Hi, I congratulate you on the splendid restoration work! I am an electronic engineer and I have the answer to the question you asked yourself at the end of the video: NiCd batteries have a nominal voltage of 1.2V and when fully charged they reach up to 1.3V. The old battery pack contained 12, which corresponds to a nominal battery voltage of 14.4V and a maximum of 15.6V at full charge. Instead the new battery is composed of 4 NMC lithium cells which have a nominal voltage of 3.7V but when fully charged they reach up to 4.2V and overall correspond to 16.8V at full charge. The charger of the old battery is built to charge up to a voltage of 15.6V so if you use it to charge the new lithium cells you will not damage them at all, but rather you will always charge them up to about 80% and it is an optimal condition for the life of lithium batteries. Obviously you will not exploit their potential to the maximum but if this is enough for you, this is fine! Hope I've been of help, congratulations again!
Dear Marco Zeni Master, I have dyson V6 when the battery pack is full it shows 24,6 v and when i used it is empty it shows 1V .and i have been using that battery pack for the last 5 years. Does it mean battery life is finished. By the way when it was new running time was 15 mn ,now it is 8 mn. Thanks in advance
So it is safe to charge these homemade battery backs with the original NiCd charger? The BMS can handle that? Can you safely keep the battery in the charger for days?
I made similar modification, but the drill was a older blue model, 9.6V, I removed all the electronics inside the charger leaving only the transformer, the idea was using a simple constant current/constant voltage regulator, I had only issues with the voltage, after rectify was 16 and more volts, noto suitable for my application, I had to use a single wave rectifier to give less to the regulator, everything went fine, and my old bosch is still alive and kicking, I bought it when I graduated from school in 1984 ;) I used very nice and powerful Sony VTC-5.
Thanks to you i rebuild the batterries from my old Bosch PSR12 with lithium 18650 and now it works perfectly! Thank you very much one more for your videos my friend!
I did exactly the same thing with an old Ryobi 12 volt drill. The NiCad batteries never really held a charge, so I put 3 lithiums in each, and I can use the drill for days before switching batteries. New life for an old drill, and a 3S BMS is a lot cheaper than a new drill. (I had perfectly good cells in a few old laptops that I took apart for parts.)
No problem charging the 4s li-ion cells with the old ni-mh charger. Max current from the charger i ok, the cells balancing will be done by the BMS, as overdischarge protection. You will only charge the new battery up to 15.6, that is 3.9 volt per cell, so almost 70% of the full capacity. It's not bad at all, and the battery will last many cycle this way. Good job!
@@Kungfupanda839 Check the output voltage of the charger. If it's not over the fully charged voltage of the battery pack you want to charge and you have a bms, it should be safe, as long as the max charge current is within the li-ion cell charge specs.
i used 4 cells and a 15amp bridge rectifier with 2x 5amp shottky diodes inline between + and - on the bridge rec, so in through any AC terminal ,+,-,+,-,+,-, and out through the other AC terminal, (draw it out to understand) put this inline with the 4 cells via the AC terminals, the forward voltage drop on 4 diodes going both in and out of the lithiums allowed me to use the makita charger as the voltage is too high otherwise, it only stops charging if I used used 2 shottky diodes in the middle of the bridge, all parts were salvaged from old PC psu's. Bridge was D15XB 60 on a heatsink and various shottky diodes worked, SB540, SB5150, 31D0046B. Keep the temperature sensor and thermal cutout in the battery housing. Was this just luck as im damned if i can explain the science why this tricks the charger into stopping the charge before it got above max of 4 x 4.2v ie.16.8v,. Dont flame me bro, i didnt even use any BMS module, i was desperate with 3 dead makita 9.6v drills that i couldn't buy the original batteries for in HK anymore. I dont charge lithiums indoors, i never let them go flat. With terminals to the outside of the case i can monitor its charging state staying within their 3v to 4.2v safe operation window.
Dear Mr"Gear Show" . I can assure you, that Ni-MH charger can't be used with Li-Po cells. Spend 3$ and buy DC/DC step down module with voltage and current control. Take down charging unit from charger, and put new module after diode bridge (put into module appx 18V DC). Output contacts mount straight to charger output. And job is done. If you will use NI-MH charger it will destroy Your cells. You should read about Charging VAC (Volt-Amper Characteristics) of Nicel and Lithium battery cells. Forgive me saying, but I'm an electronics and telecommunication engineer. I know what I'm saying. Best regards.
@@E-hab He is using the correct BMS (4S 40A). Which is designed for, as the name suggests, a 4 cells in series. 40A is the maximum continuous discharge current and 20A is the maximum continuous charging current. Those numbers assume very good cooling so they're to be considered an upper limit. One thing to note about the connections (soldering) is that the inner connections between the 4 cells and the BMS don't need to be heavy gauge. They won't be carrying any serious current as they're for sensing. As far as i can see and keep in mind that i am a bit old. That's an AL 60 DV Bosch charger for the 14.4v Ni-Cd battery. The old battery got 12 cells each with 1.2v nominal to make the total of 14.4v. The charger output voltage is around 15.83v which was just fine for the old Ni-Cd at 1.32v per cell but a bit low for the 18650. The new 18650s can take up to 4.2v per cell or 16.8 for the battery as he says at 17:12 in the video. Long story short, the charger output is a bit lower than what the BMS can work with if you want 4.2v per cell. I think that BMS needs something like 18.1v input to be able to charge the new cells fully. So you can either gut the charger, keep the shell and the contacts and install a small 18v SMPS board inside which is kind of a crappy solution because it won't supply the current for fast charging. Or you can hack whatever board Bosch put in there to get the 18 volts you need. Some of those charger revisions work with PICs, Max232s or the TL494.
I did exactly this modification over a year ago using a similar chinese BMS and charging on the original Bosch nicad charger. I have had no issues whatsoever other than the BMS overcurrent cuts in if you pull the trigger too fast initially.
@@cedley1969 Looks like you have a weak cells. When you pull the trigger to fast voltage goes down and BMS shuts down power. Use a capacitor 16-25V 10.000mF connected on BMS output contacts.
Memorável 🤩 tenho pesquisado o assunto e vi diversos vídeos até chegar ao seu; alguns em minha língua natal e outros em vários idiomas e todos foram muito instrutivos, no entanto o seu vídeo me chamou a atenção pelas interações dos participantes que, generosamente, ofertam informações complementares respondendo aos questões de outros que como eu buscam respostas para o uso do "carregador original" sem necessidade de descarte. Infelizmente, como dito em alguns comentários, o seu uso pode ser perigoso caso entregue mais de 16v...o que faria a aquisição de um novo carregador dedicado as baterias de litio mais seguro para esse projeto. Aqui no Brasil há divergência de opinião quanto ao uso do carregador original, mas nenhum vídeo sobre "uma adaptação" para usá-lo o que seria ótimo. Sou grata pelo vídeo e, por gostar do seu estilo respeitoso e gentil, fiz inscrição no canal para acompanhar o seu trabalho. Sou agradecida também aos seus colaboradores que nos comentários ofereceram informação valiosa e também gentil com palavras de incentivo. Saudações do Brasil- setembro de 2022.
Çok iyi bir çalışma ve sürükleyici bir Video... PSR 14.4 BOSH matkabım İyi bir restorasyon ile hayata döndü. Paylaşımlarınız için Teşekkürler. Türkiye'den selamlar...
I really liked yr vid a lot, since I have been revamping that old stuff myself recently - all into 18650 LiIons.This transformation is at the cost of the device to charge this battery pack, however, which needs to be either a balanced charger (then you would have to provide leads to a balancer) or a fully regulated (laboratory) power supply. I have both, so I do not bother, but be warned that your former battery charger goes directly into trash, unfortunately as BMSes come in two flavours, so beware!. Hope you'll be happy with the retrofit, anyway, as I am!
Good job! With regards to the battery, the NiCd/NiMH charger will definitely be not good for the LiIon cells, they require a totally different voltage/amps while charging. You can get PCBs which are capable of not only distributing the load on the cells while discharging, but also aid in the charging as well. That way you only have to supply an approximate voltage to the whole battery and the PCB does its job, charging the cells separately and evenly. That is what I used when rebuilding an old cordless drill with LiIon cells.
@@Apafej627 Or, if you are in Hungary, here are some: www.vatera.hu/szorakoztato-elektronika/elemek-akkumulatorok-toltok/toltok-toltoszettek/index-c7468.html?qt=1&td=on&q=Li-ion+18650%2C+Cella+v%C3%A9delemmel+ell%C3%A1tott+BMS+t%C3%B6lt%C5%91+modul+t%C3%B6bb+cell%C3%A1hoz+is.
Thợ nước ngoài hay hơn thợ vn ,vn mà thay pin lion mà xài mạch này thì phải móc dây ra để sặc bằng alapto còn đằng này cắm luôn vào cái sặc rin mà vẫn nhận sặc được, quá giỏi 🏆🏆👍👍👍
Great video, I have the older 12volt version of that as well the blue 12volt pistol drill, the batteries still take a charge if you want to use them but lose charge in storage, i have just broken a 48v 18650 battery into bits. I have the battery welder and all the nickel strip. I also need 18v and 24 v batteries. I guess it’s time to have ago, maybe in the garden to start with. Need to get some BMS’s first.
Lithium batteries have a different charge method than NiCad or NiMh batteries. Also you have a BMS built into the charger that is set up to charge/monitor NiCad while also having a BMS in the battery for the LiPO Batts. A converted LiPO charger that plugs into the B6 works wonders. I've done this with all my old Makita cordless tools
If the power charge amperage is compatible (ex,1.5 Ah) with the batteries its OK,otherwise you have to change(adopt) the transformer inside the charger like I did to same look like Bosch drill 7.2 volts, and worked very well..👍
At about 12:40 You can see a resistor at the connector which is used to set the charging-Voltage ( It is connected to the + connection of the battery and one of the Control-Pins on the battery-connector. The other Control-Pin is used to measure the temperature ) You may change its value to set the correct charging-Voltage.
Hallo Juergen, eine Frage aus Holland: ich suche jemanden der bekannt ist mit die bms Platine von eine Bosch psr 14,4 Li machine. Kannste du mir weiter helfen? Gr. Jan
I did the same before i watched this video but 3S 2P with 20Amp. BMS in my old 12v Bosch drill machine, what resistor value can i use Sir Juergen Schimmer?.
Estimado Sr. "Gear Show" Excelente trabajo!!!... Me parece que se debe hacer modificaciones en el cargador, porque el mismo está diseñado para cargar celdas Nicd/Nimh y no celdas de Lithium!!!... Gracias por tus videos y aportes a la sociedad, al difundirlos!!!... Sigue así!!!
@Yonnata pero parece que el cargador no lo modifica, yo creo que carga Con el cargador antiguo, porque deja en los conectores los diodos o resistencias puestos.
People should understand the difference between 'live longer' and 'last longer'. The first means longer lifetime, more charging and discharging cycles. The latter means 'one charge life', so, how long you can use the drill until battery needs recharging. I would agree that charging battery to less than 100 per cent could make it live longer. But I think discharging to 0% kills the battery even harder.
Nice. I hadn't thought of putting the cells in L shape. I refurbished my METABO (12V, NiCd) in a similar way, you can fit 2 packs of 4 18650 cells in a 2x2 setup in there (as 4s2p). But you definitely have to sharpen your drill bits :-)
Gear Show Buon lavoro, per fare bene quello che tu hai fatto , sarebbe stato utile vedere con meticolosità il collegamento in serie delle pile, In teoria + -+-+-+ - in pratica dovendole mettere in modo diverso per via dello spazio, ci si confonde un pò. Bravo Grazie
Very good video, and really well filmed. It's really recommended to charge lithium batterie with a specific Lithium charger. Your NICD charger did not overcharge the pack and it's a chance, it could waste your pack. But as you have an Imax (not expensive and very useful), so connect every balance wire from + pole of each accu to the BMS (you didn't do it) and simply use the Imax, it's much safer . But it was a good experience. Well, some nicd chargers give easily 18/20V and it would be a pity for the pack, so for each one, control absolutely the voltage of the charger before use. Hi from France!
One other issue to use Ni-Cd charger for lithium battery is that you have no trickle charge at the end to balance the cells correctly. Your charger gives max 15,6V, but you must reach16,8V : after that a (good) BMS stops constant current for constant voltage and balances the cells with the trickle charge. With 15,6V max this operation cannot be done , and after several charges you can get an unbalanced pack, in particular if you build this pack with "recuperated" cells. (NO laptop cells for a drill pack!! Discharge amps too low!) A good lithium charger (like Imax B6) realises the trickle charge perfectly and protects the pack during charge and balance, even if these cheap BMS are faulty, and it's often possible. I always add a balance connector to the pack , also connected to the Imax (necessary for the trickle charge), and so I know exactly the voltage of each cell and balance quality on the screen of the Imax. It's an important condition for a long life of the pack. And I know immediately if one cell begins to be faulty to change it....A lot of packs have only one dead cell (in this case the battery does not run anymore)
Hi Kaziomiesz xd yeah that sounds exactly right. I have done this Li Ion rebuild on my Bosch 9.6V drill using very similar BMS and method to gear show in this vid. It's clear to me this is the right BMS. As well as high 40A, other ones have different input and output terminals. That means that you would not be able to use the original charger - if you tried to you would have the charging current going to the wrong BMS terminals. I opened up my old charger, there is a lot of control circuitry. To my surprise when I plugged it in, I measured 19V across the output terminals (it's a typ 2 607224006 sec 7.2-12V, 1.3A/15.3VA). One thing that hasn't been mentioned is that a temperature sensor is standard on thse old NiCd batteries with a 3rd connection on the battery to connect to the charger. I made a point of keeping that connected in my rebuild with the intent of trying the old charger. However if I rip out all the old circuitry that all becomes irrelevant. Can you suggest suitable rectifier and CCCV (buck/boost?) for doing this?
Po naładowaniu oryginalną ładowarką przed pomiarem trzeba pobudzić BMS czyli na chwilę obciążyć (raz wcisnąć włącznik) i zmierzyć napięcie. Oryginalna ładowarka daje radę. Filmik jak najbardziej OK W modelu na 12V można zastosować 6 ogniw. Mam tak przerobioną i jestem bardzo zadowolony.
Hello,Nice Work!. From my Experiance,i think because you have the BMS board it doesnt mater at all. It will take any settings of voltage and amperes for Nicd batteries and convert them just right for the 18650...i do that all the time. if charger wont work you always can add a back boost converter inside and fix the apropreate voltage and ampers. good job!
Hello. The BMS from the video while charging is monitoring only thr voltage of each cell. Unfortunately it is not monitoring the charging current. So it is needed a correct CC-CV charger for this setup.
Hello,the charging curent of the BMS board has a wide range of Voltage and Amperes so you dont need to worry at all.Look at the specifications of your BMS board.
You can use a dji phantom 3 or 4 battery charger (17.4V) to charge the new litium battery, the bms will cut the charge at 16.8V, or a laptop charger rated 17.4V (could be a 19.5v modified), remove the electronics from inside the charger and put them inside de old nicad charger case
Man i just did this thing to the same drill model, same bms type and cell number, i wasn't sure if i can use the same charger until i saw this video, thank you very much for this ! I had subscribed!
Charging a Lipo cell bellow its top capacity (voltage) will increase its life span (by a lot actually): the lipo cell will take much more cycles of charge/discharge
@@gear_show not really, he say and i confirm that it will have more life cycles, because you not fully charging. The battery will be killed because you did not connect balance leads
Yes, charging below full charge will give the cells more lifespan. However, you need each cells to 4.2V (16.8V in 4s) because the balancing function of the BMS starts at 4.15 above. Therefore you need to periodically charge the pack to 100% if you intend to maintain all cells balanced in the long run
That's OK charging a LiIon battery not Full helps it lifetime, best value would be about 85%. The charging itself is protect by the BMS so you can't overcharge or overdischarge the battery.
Not really. If some cells are dead or have very low voltage, then you will overcharge others, because the total voltage is still low. That's why balance cables and sometimes fully charging is important. Overcharged lithium batteries can combust or explode like fireworks! If one is lit, it's a chain reaction with all the others. Also I would use spacers instead of just letting the cells touch. For parallel groups this isn't a problem, but when the wrapping around the cell rips, for example when the drill falls or gets vibration, then you get a short! Lithium cells are amazing because of their energy density, but at the same time dangerous when not used right.
Tjorven Van Hoeyveld he is using a BMS with balanced, and charging up to 80% is best for LiIon, of course in the case one cell is defective it could happen that you reverse charge. If you use an external charger with individual cell protection it’s the only way to detect this.
It is a pity that the currently produced NI-CD cells have such poor durability, 30 years was completely different. Currently, Ni-Cd is expensive and very unstable, and Li-ion is cheap and durable. Things were reversed. Previously, Bosch had an AL15FC charger that charged the battery in about 12-15 minutes, and had about 1000-2000 work cycles (for AL12FC - 3000 cycles). Currently, Bosch has been making chargers 60 minutes of charging and about 300 duty cycles, like other manufacturers. Interestingly, the scientific possibilities have retreated, for years the producers of ni-cd and ni-mh have not been able to construct a cell that can withstand charging with the AL15FC charger with a current of 8.5-10 A. This charger has not been used for several years due to the lack of quality cells from the 90s '. Great job :-) Regards :-).
These are my MOST favorite videos, I just love when someone restores something that is destined for the scrapper to fully working order! Also I love when you clean up the things SO much that they're identical to brand new I do have a few salvaged cells from laptops... Maybe I'll try this?
Ya lo hice todo perfecto. Gracias a tu ayuda. Se puede utilizar el mismo cargador? Me dio la impresión que cargaba lento. Lo voy a utilizar al taladro para acabar la batería y así probar cuánto tarda en cargar
@@chimpora0623 no del todo bien. Me falta el tema de la carga. Utilice el mismo cargador pero no llega a completar la carga y el taladro se la consume rápido
Good conversion！I believe this type of BMS module only monitor the discharging voltage of the battery pack. When the pack is charged with Ni-mh charger, the end-of-charge pack voltage is determined by the charger which is why only 15.83v compared to imax b6's 16.8v. 15.83v definitely not an ideal fully-charged 4s li-ion pack .
Maybe you can open up the charger and see if you can change the output voltage to get more voltage out of it. I am sure the circuit can be tweaked to get more output and that will charge the new cells higher and give you more run time. I am pretty sure it is a switching mode charger. Just an idea...
Good job. I have just done a very similar rebuild on my old Bosch 9.6v batteries. One thing I did that you didn't is incorporate a LED charge indicator. I also set it up so I can optionally charge using spec for the 3S bms 12V DC input via the BMS (5.5mm jack), or with my Imax B6 (direct connection to the cells via Dean connector + JST balance connector). See also my reply below to Kaziomiesz
@@marahutti7465 I have come to the conclusion that the simplest way to go is to pick up a cheap (~ 5 bucks/pounds or so) Li On charger rated for 3S = 12.6v, these normally come with a 5.5mm jack plug. I did try an original charger for a 14.4v drill, (4S rebuild), its spec output V was nominally ok at 17.5V (BMS spec 16.8-18V), but it wouldn't charge the rebuilt battery, green LED came on but not red charging led. Maybe blocked by the bms actually now I think about it, when I measure the output V acros the charger terminals without load it was about 18.5v. Using a Li IOn dedicated charger avoids issues over the differences between charging Ni Cad and charging Li IOn, as per other comments here...
Heyyy Dear u r perfect Man. I wanna say something about NiCd battery charger. Yes it is possible but u can charge with it Just 10 15 times. U can arrange New adapter 16.8 V or 19.6(laptop battery charger with step down or without step down). NiCd charger kills ur batteries. I like ur videos and follow u 👏👍😊. This is my experience. 😉 U r better than me. Maybe U know 1 miilion things. I know 10 things. Sincerely. 👍
Cuanto tiempo duraron tus celdas con ese cargador (el original)?, Las mías menos de 10 cargas y fallaron dos celdas, tuve que agregar a la batería un conector DC jack y cualquier cargador que entregue entre 17 y 20 volts DC a 3 ampers me sirvió
I love UA-cam, there's a lot of smart people in this world and most of the time they can put their brains together and do great things. Careful though 'cause there's a lot of bullshit too.
hi your shows 15.49 v at the bms + - port but mine shows 12.65v, all the other volts 0, 4.2, 8.4, 12.6, 16.4 on the bms show correctly what is the problem is it a bad board, wiring was done as you have shown
The NiMh/NiCd charger won't give a full capacity charge but the US military only charges lithium cells to about 89% of capacity for longer life. You'll get fewer minutes per charge but many more charges - it's a trade0off.
Сверление не показатель, надо закручивать саморез 100 мм. Обязательна переделка зарядного устройства, другой тип аккумуляторов. Но все равно лайк за продление жизни, Bosch хорошая фирма.
The white element at the end of two black wires is a thermistor. Please place this element as close to the battery cells as possible. It is used to measure temperature during charging. If the cells are damaged, overheating will occur, then the charger will stop charging and may save you from fire.
Creo que las baterias de litio necesitan un corte de corriente de carga al llegar a Vmax =4.2V Los cargadores NiCad suelen dejar una carga de goteo que podria estropear las baterias de Litio.
Hi, I congratulate you on the splendid restoration work! I am an electronic engineer and I have the answer to the question you asked yourself at the end of the video: NiCd batteries have a nominal voltage of 1.2V and when fully charged they reach up to 1.3V. The old battery pack contained 12, which corresponds to a nominal battery voltage of 14.4V and a maximum of 15.6V at full charge. Instead the new battery is composed of 4 NMC lithium cells which have a nominal voltage of 3.7V but when fully charged they reach up to 4.2V and overall correspond to 16.8V at full charge. The charger of the old battery is built to charge up to a voltage of 15.6V so if you use it to charge the new lithium cells you will not damage them at all, but rather you will always charge them up to about 80% and it is an optimal condition for the life of lithium batteries. Obviously you will not exploit their potential to the maximum but if this is enough for you, this is fine! Hope I've been of help, congratulations again!
Very well explanation, I do appreciate with your information. Now I got it.
Dear Marco Zeni Master, I have dyson V6 when the battery pack is full it shows 24,6 v and when i used it is empty it shows 1V .and i have been using that battery pack for the last 5 years. Does it mean battery life is finished. By the way when it was new running time was 15 mn ,now it is 8 mn. Thanks in advance
So it is safe to charge these homemade battery backs with the original NiCd charger? The BMS can handle that? Can you safely keep the battery in the charger for days?
I made similar modification, but the drill was a older blue model, 9.6V, I removed all the electronics inside the charger leaving only the transformer, the idea was using a simple constant current/constant voltage regulator, I had only issues with the voltage, after rectify was 16 and more volts, noto suitable for my application, I had to use a single wave rectifier to give less to the regulator, everything went fine, and my old bosch is still alive and kicking, I bought it when I graduated from school in 1984 ;) I used very nice and powerful Sony VTC-5.
DO YOU USE A 2S BMS ? USING 16 VOLTS NO PROBLEM THE BMS WILL LINIT THE CHARGING CURRENT TO 500 mA per cell and the voltage to 8.4 volts on the cells
Thanks to you i rebuild the batterries from my old Bosch PSR12 with lithium 18650 and now it works perfectly! Thank you very much one more for your videos my friend!
I have done this exact thing to this exact drill 2 years ago, still works 100% fine!
Hi bro, What type of battery is used? I try to diy, used battery 18650 , 30A?
@@nz9552 i used some used laptop cells... i don’t know the amps... but IT’s not more than 2000mAh... the bms used was a 25A bms Off eBay
주의할점 한가지! 배터리 직렬 연결시에는 셀간 절연필수. 셀간 공간을(약1mm) 두거나,절연지&절연링 넣고 고정하세요.시간지나면 외부충격으로 배터리 비닐 마모로 인하여 short로 화재 위험이 있음.
영상 잘보았습니다 ♡
공유해 주셔서 감사합니다!
I have wanted to do this for my cordless and feel better about doing it now that I have seen your video. Thanks
I did exactly the same thing with an old Ryobi 12 volt drill. The NiCad batteries never really held a charge, so I put 3 lithiums in each, and I can use the drill for days before switching batteries. New life for an old drill, and a 3S BMS is a lot cheaper than a new drill. (I had perfectly good cells in a few old laptops that I took apart for parts.)
Were the lithium cells 10C capacity or more ??
I have 1C lithium batteries
Bosch drill ;Made in Malaysia. Thanks for your using Malaysian product
My pleasure!
No problem charging the 4s li-ion cells with the old ni-mh charger. Max current from the charger i ok, the cells balancing will be done by the BMS, as overdischarge protection. You will only charge the new battery up to 15.6, that is 3.9 volt per cell, so almost 70% of the full capacity. It's not bad at all, and the battery will last many cycle this way. Good job!
Thank you for sharing!
Is it advisable to charge li-ion using old ni-cad charger rated 12-14v with 1.5A?
@@Kungfupanda839 Check the output voltage of the charger. If it's not over the fully charged voltage of the battery pack you want to charge and you have a bms, it should be safe, as long as the max charge current is within the li-ion cell charge specs.
i used 4 cells and a 15amp bridge rectifier with 2x 5amp shottky diodes inline between + and - on the bridge rec, so in through any AC terminal ,+,-,+,-,+,-, and out through the other AC terminal, (draw it out to understand) put this inline with the 4 cells via the AC terminals, the forward voltage drop on 4 diodes going both in and out of the lithiums allowed me to use the makita charger as the voltage is too high otherwise, it only stops charging if I used used 2 shottky diodes in the middle of the bridge, all parts were salvaged from old PC psu's.
Bridge was D15XB 60 on a heatsink and various shottky diodes worked, SB540, SB5150, 31D0046B.
Keep the temperature sensor and thermal cutout in the battery housing.
Was this just luck as im damned if i can explain the science why this tricks the charger into stopping the charge before it got above max of 4 x 4.2v ie.16.8v,.
Dont flame me bro, i didnt even use any BMS module, i was desperate with 3 dead makita 9.6v drills that i couldn't buy the original batteries for in HK anymore.
I dont charge lithiums indoors, i never let them go flat.
With terminals to the outside of the case i can monitor its charging state staying within their 3v to 4.2v safe operation window.
Dear Mr"Gear Show" . I can assure you, that Ni-MH charger can't be used with Li-Po cells. Spend 3$ and buy DC/DC step down module with voltage and current control. Take down charging unit from charger, and put new module after diode bridge (put into module appx 18V DC). Output contacts mount straight to charger output. And job is done.
If you will use NI-MH charger it will destroy Your cells. You should read about Charging VAC (Volt-Amper Characteristics) of Nicel and Lithium battery cells.
Forgive me saying, but I'm an electronics and telecommunication engineer. I know what I'm saying.
Best regards.
Even with the correct BMS in place? By the way, he's using the wrong BMS for the job.
@@andreykldjian
What is the correct one?
@@E-hab He is using the correct BMS (4S 40A). Which is designed for, as the name suggests, a 4 cells in series. 40A is the maximum continuous discharge current and 20A is the maximum continuous charging current. Those numbers assume very good cooling so they're to be considered an upper limit. One thing to note about the connections (soldering) is that the inner connections between the 4 cells and the BMS don't need to be heavy gauge. They won't be carrying any serious current as they're for sensing.
As far as i can see and keep in mind that i am a bit old. That's an AL 60 DV Bosch charger for the 14.4v Ni-Cd battery. The old battery got 12 cells each with 1.2v nominal to make the total of 14.4v. The charger output voltage is around 15.83v which was just fine for the old Ni-Cd at 1.32v per cell but a bit low for the 18650. The new 18650s can take up to 4.2v per cell or 16.8 for the battery as he says at 17:12 in the video.
Long story short, the charger output is a bit lower than what the BMS can work with if you want 4.2v per cell. I think that BMS needs something like 18.1v input to be able to charge the new cells fully. So you can either gut the charger, keep the shell and the contacts and install a small 18v SMPS board inside which is kind of a crappy solution because it won't supply the current for fast charging. Or you can hack whatever board Bosch put in there to get the 18 volts you need. Some of those charger revisions work with PICs, Max232s or the TL494.
I did exactly this modification over a year ago using a similar chinese BMS and charging on the original Bosch nicad charger. I have had no issues whatsoever other than the BMS overcurrent cuts in if you pull the trigger too fast initially.
@@cedley1969 Looks like you have a weak cells. When you pull the trigger to fast voltage goes down and BMS shuts down power. Use a capacitor 16-25V 10.000mF connected on BMS output contacts.
Memorável 🤩 tenho pesquisado o assunto e vi diversos vídeos até chegar ao seu; alguns em minha língua natal e outros em vários idiomas e todos foram muito instrutivos, no entanto o seu vídeo me chamou a atenção pelas interações dos participantes que, generosamente, ofertam informações complementares respondendo aos questões de outros que como eu buscam respostas para o uso do "carregador original" sem necessidade de descarte. Infelizmente, como dito em alguns comentários, o seu uso pode ser perigoso caso entregue mais de 16v...o que faria a aquisição de um novo carregador dedicado as baterias de litio mais seguro para esse projeto. Aqui no Brasil há divergência de opinião quanto ao uso do carregador original, mas nenhum vídeo sobre "uma adaptação" para usá-lo o que seria ótimo. Sou grata pelo vídeo e, por gostar do seu estilo respeitoso e gentil, fiz inscrição no canal para acompanhar o seu trabalho. Sou agradecida também aos seus colaboradores que nos comentários ofereceram informação valiosa e também gentil com palavras de incentivo. Saudações do Brasil- setembro de 2022.
Fico muito feliz em saber disso, muito obrigado por compartilhar!
Çok iyi bir çalışma ve sürükleyici bir Video... PSR 14.4 BOSH matkabım İyi bir restorasyon ile hayata döndü. Paylaşımlarınız için Teşekkürler. Türkiye'den selamlar...
Great.. I'm going to do the same thing with some older cordless drills...
I really liked yr vid a lot, since I have been revamping that old stuff myself recently - all into 18650 LiIons.This transformation is at the cost of the device to charge this battery pack, however, which needs to be either a balanced charger (then you would have to provide leads to a balancer) or a fully regulated (laboratory) power supply. I have both, so I do not bother, but be warned that your former battery charger goes directly into trash, unfortunately as BMSes come in two flavours, so beware!. Hope you'll be happy with the retrofit, anyway, as I am!
Good job! With regards to the battery, the NiCd/NiMH charger will definitely be not good for the LiIon cells, they require a totally different voltage/amps while charging.
You can get PCBs which are capable of not only distributing the load on the cells while discharging, but also aid in the charging as well. That way you only have to supply an approximate voltage to the whole battery and the PCB does its job, charging the cells separately and evenly. That is what I used when rebuilding an old cordless drill with LiIon cells.
I appreciate you sharing your experience with me. I have learned a new thing.
Can you share a link to the PCBs you're talking about? Please.
@@Apafej627 Or, if you are in Hungary, here are some: www.vatera.hu/szorakoztato-elektronika/elemek-akkumulatorok-toltok/toltok-toltoszettek/index-c7468.html?qt=1&td=on&q=Li-ion+18650%2C+Cella+v%C3%A9delemmel+ell%C3%A1tott+BMS+t%C3%B6lt%C5%91+modul+t%C3%B6bb+cell%C3%A1hoz+is.
Thợ nước ngoài hay hơn thợ vn ,vn mà thay pin lion mà xài mạch này thì phải móc dây ra để sặc bằng alapto còn đằng này cắm luôn vào cái sặc rin mà vẫn nhận sặc được, quá giỏi 🏆🏆👍👍👍
Great video, I have the older 12volt version of that as well the blue 12volt pistol drill, the batteries still take a charge if you want to use them but lose charge in storage, i have just broken a 48v 18650 battery into bits. I have the battery welder and all the nickel strip. I also need 18v and 24 v batteries. I guess it’s time to have ago, maybe in the garden to start with. Need to get some BMS’s first.
Lithium batteries have a different charge method than NiCad or NiMh batteries. Also you have a BMS built into the charger that is set up to charge/monitor NiCad while also having a BMS in the battery for the LiPO Batts. A converted LiPO charger that plugs into the B6 works wonders. I've done this with all my old Makita cordless tools
From what I understand this charger,set up for NiCad will never fully charge the lithium cells,that have a higher maximum voltage,right?
could you explain more plz ?
Nice ....Wow that old model but looks original..love Bosch
Terima kasih atas berbagi ilmu cara mengatasi kelistrikan pada cordless.
Sama-sama, saya senang video saya membantu Anda.
Good lock always to you my brother.
These videos are very encouraging no need to throw things away that are easily repairable 👍
If the power charge amperage is compatible (ex,1.5 Ah) with the batteries its OK,otherwise you have to change(adopt) the transformer inside the charger like I did to same look like Bosch drill 7.2 volts, and worked very well..👍
Okay, I see, thank you for sharing!
This video gave me some good ideas. Thank you.
Samos island, Greece 🇬🇷
Bu matkabı satarmısın samsun
Γειά σου πατρίδα.
Από Αθήνα.
Πολλοί Σαμιώτες βλέπουμε το κανάλι του τελικά
At about 12:40 You can see a resistor at the connector which is used to set the charging-Voltage ( It is connected to the + connection of the battery and one of the Control-Pins on the battery-connector. The other Control-Pin is used to measure the temperature ) You may change its value to set the correct charging-Voltage.
Hallo Juergen, eine Frage aus Holland: ich suche jemanden der bekannt ist mit die bms Platine von eine Bosch psr 14,4 Li machine. Kannste du mir weiter helfen? Gr. Jan
I had wondered about mission of you mentioned resistor. I have learned because of you. Thank you.
I did the same before i watched this video but 3S 2P with 20Amp. BMS in my old 12v Bosch drill machine, what resistor value can i use Sir Juergen Schimmer?.
buen trabajo, ¿podrias convertir el cargador de Nicd/Nimh a uno de Litio usando la misma carcasa? gracias por tu respuesta, saludos desde Peru
Estimado Sr. "Gear Show" Excelente trabajo!!!... Me parece que se debe hacer modificaciones en el cargador, porque el mismo está diseñado para cargar celdas Nicd/Nimh y no celdas de Lithium!!!... Gracias por tus videos y aportes a la sociedad, al difundirlos!!!... Sigue así!!!
Hello @Yonnata David Pavón! Sí, necesito modificar el cargador. De todos modos gracias por compartir!
@Yonnata pero parece que el cargador no lo modifica, yo creo que carga Con el cargador antiguo, porque deja en los conectores los diodos o resistencias puestos.
Excelente y limpio trabajo, el mejor que he visto. Profesional. Thank you.!
C’est excellent merci beaucoup pour l’exercice
Charged with nicd charger 80%, thats nice for the cells👍👍 they live a lot longer this way
Oh, really! I am glad to hear that. But I saw many comments in this video I need to make a modification on this charger.
People should understand the difference between 'live longer' and 'last longer'. The first means longer lifetime, more charging and discharging cycles. The latter means 'one charge life', so, how long you can use the drill until battery needs recharging.
I would agree that charging battery to less than 100 per cent could make it live longer. But I think discharging to 0% kills the battery even harder.
Excellent! Completely clear instructions. Exactly what I need to do for my Bosch PSR - thank you!
I'm glad it helped!
Nice. I hadn't thought of putting the cells in L shape. I refurbished my METABO (12V, NiCd) in a similar way, you can fit 2 packs of 4 18650 cells in a 2x2 setup in there (as 4s2p).
But you definitely have to sharpen your drill bits :-)
Yes it is, I drill it touched the screws inside the wooden. Anyway thank you for sharing.
Gear Show Buon lavoro, per fare bene quello che tu hai fatto , sarebbe stato utile vedere con meticolosità il collegamento in serie delle pile, In teoria + -+-+-+ - in pratica dovendole mettere in modo diverso per via dello spazio, ci si confonde un pò. Bravo Grazie
Very good video, and really well filmed.
It's really recommended to charge lithium batterie with a specific Lithium charger. Your NICD charger did not overcharge the pack and it's a chance, it could waste your pack. But as you have an Imax (not expensive and very useful), so connect every balance wire from + pole of each accu to the BMS (you didn't do it) and simply use the Imax, it's much safer .
But it was a good experience. Well, some nicd chargers give easily 18/20V and it would be a pity for the pack, so for each one, control absolutely the voltage of the charger before use. Hi from France!
One other issue to use Ni-Cd charger for lithium battery is that you have no trickle charge at the end to balance the cells correctly. Your charger gives max 15,6V, but you must reach16,8V : after that a (good) BMS stops constant current for constant voltage and balances the cells with the trickle charge. With 15,6V max this operation cannot be done , and after several charges you can get an unbalanced pack, in particular if you build this pack with "recuperated" cells. (NO laptop cells for a drill pack!! Discharge amps too low!)
A good lithium charger (like Imax B6) realises the trickle charge perfectly and protects the pack during charge and balance, even if these cheap BMS are faulty, and it's often possible.
I always add a balance connector to the pack , also connected to the Imax (necessary for the trickle charge), and so I know exactly the voltage of each cell and balance quality on the screen of the Imax. It's an important condition for a long life of the pack. And I know immediately if one cell begins to be faulty to change it....A lot of packs have only one dead cell (in this case the battery does not run anymore)
Two Words : Simply Excellent! 👏👏👏
Thank you so much 😀
You have to make new charger. You can use old transformator from this charger, add graetz bridge and set 16,8v 1,5A with cccv step Down/up controller
Okay, I got it. thank you so much!
gear show make a video pls
Hi Kaziomiesz xd yeah that sounds exactly right. I have done this Li Ion rebuild on my Bosch 9.6V drill using very similar BMS and method to gear show in this vid. It's clear to me this is the right BMS. As well as high 40A, other ones have different input and output terminals. That means that you would not be able to use the original charger - if you tried to you would have the charging current going to the wrong BMS terminals.
I opened up my old charger, there is a lot of control circuitry. To my surprise when I plugged it in, I measured 19V across the output terminals (it's a typ 2 607224006 sec 7.2-12V, 1.3A/15.3VA). One thing that hasn't been mentioned is that a temperature sensor is standard on thse old NiCd batteries with a 3rd connection on the battery to connect to the charger. I made a point of keeping that connected in my rebuild with the intent of trying the old charger. However if I rip out all the old circuitry that all becomes irrelevant.
Can you suggest suitable rectifier and CCCV (buck/boost?) for doing this?
@@familybrown2283 can you send me photo of this to my mail janekkazimir2005@gmail.com or on fb "Janek Kazimir" from Poland?
Ktoś lubi staśka od wazzup
Great job ! An old drill back to service !!
Po naładowaniu oryginalną ładowarką przed pomiarem trzeba pobudzić BMS czyli na chwilę obciążyć (raz wcisnąć włącznik) i zmierzyć napięcie.
Oryginalna ładowarka daje radę.
Filmik jak najbardziej OK
W modelu na 12V można zastosować 6 ogniw.
Mam tak przerobioną i jestem bardzo zadowolony.
Hello,Nice Work!. From my Experiance,i think because you have the BMS board it doesnt mater at all. It will take any settings of voltage and amperes for Nicd batteries and convert them just right for the 18650...i do that all the time. if charger wont work you always can add a back boost converter inside and fix the apropreate voltage and ampers.
good job!
Hello. The BMS from the video while charging is monitoring only thr voltage of each cell. Unfortunately it is not monitoring the charging current. So it is needed a correct CC-CV charger for this setup.
Hello,the charging curent of the BMS board has a wide range of Voltage and Amperes so you dont need to worry at all.Look at the specifications of your BMS board.
@@bunsoft2 Hi, can you indicate a good charger unit? like a IMAX b6? or?
Thanks for your video, it’s very helpful . Good job
I always like to watch these kind of videos, nice and give some experience to do what you didn't know what to
Yeah?
Its a restoration masterclass... so cool to watch. Thank you for sharing.
it's nice to get old power tools going.
You can use a dji phantom 3 or 4 battery charger (17.4V) to charge the new litium battery, the bms will cut the charge at 16.8V, or a laptop charger rated 17.4V (could be a 19.5v modified), remove the electronics from inside the charger and put them inside de old nicad charger case
Otima ideia para o reaproveitamento da carcaça. grata por compartilhar.
Bosch,makita and dewalt is my favorite brand of drills
Very instructif video ...I love it ....thankyou
I honestly love these drill videos! The time and effort they take to fix is crazy! Keep up The good work!
Thank you so much :)
Jg
شكرا لك على هذه المعلومات .. كنت أتساءل هل تغير الشاحن اقديم ام لا .. ابراهيم من الجزائر
This is how we start saving the world!
And our wallet.......
Man i just did this thing to the same drill model, same bms type and cell number, i wasn't sure if i can use the same charger until i saw this video, thank you very much for this ! I had subscribed!
Any issues thenafter ? I am thinking to make the same experiment with 18650 batteries + BMS + original charger Ni-Cd but I am worried if this is safe
00:06:21 ale wydłubał a wystarczyło wkręta czarnego do drewna wkręcić i pięknie wychodzi, taki Januszowy sposób widzę, ślady otwierania muszą być ;D
Cześć Weryfany. Napisz w englisch, żeby człowiek zrozumiał o co Ci chodzi. Podziel się wiedzą. Pozdro
I envy your skill. I will try it. Thank you.
You can do it!
I did the same before i watched this video but 3S 2P with 20Amp. BMS in my old 12v Bosch drill machine
Good restoration work
Charging a Lipo cell bellow its top capacity (voltage) will increase its life span (by a lot actually): the lipo cell will take much more cycles of charge/discharge
Okay, I understand it. So this way it reduce lipo cell life span. Anyway thank you so much!
@@gear_show not really, he say and i confirm that it will have more life cycles, because you not fully charging. The battery will be killed because you did not connect balance leads
@@michalhudek But he did hook up balance connections? He just did it with the nickel strips directly.
Yes, charging below full charge will give the cells more lifespan. However, you need each cells to 4.2V (16.8V in 4s) because the balancing function of the BMS starts at 4.15 above. Therefore you need to periodically charge the pack to 100% if you intend to maintain all cells balanced in the long run
That's OK charging a LiIon battery not Full helps it lifetime, best value would be about 85%. The charging itself is protect by the BMS so you can't overcharge or overdischarge the battery.
Oh really, Thank for sharing!
Not really. If some cells are dead or have very low voltage, then you will overcharge others, because the total voltage is still low. That's why balance cables and sometimes fully charging is important. Overcharged lithium batteries can combust or explode like fireworks! If one is lit, it's a chain reaction with all the others. Also I would use spacers instead of just letting the cells touch. For parallel groups this isn't a problem, but when the wrapping around the cell rips, for example when the drill falls or gets vibration, then you get a short! Lithium cells are amazing because of their energy density, but at the same time dangerous when not used right.
Tjorven Van Hoeyveld he is using a BMS with balanced, and charging up to 80% is best for LiIon, of course in the case one cell is defective it could happen that you reverse charge. If you use an external charger with individual cell protection it’s the only way to detect this.
It is a pity that the currently produced NI-CD cells have such poor durability, 30 years was completely different. Currently, Ni-Cd is expensive and very unstable, and Li-ion is cheap and durable. Things were reversed. Previously, Bosch had an AL15FC charger that charged the battery in about 12-15 minutes, and had about 1000-2000 work cycles (for AL12FC - 3000 cycles). Currently, Bosch has been making chargers 60 minutes of charging and about 300 duty cycles, like other manufacturers. Interestingly, the scientific possibilities have retreated, for years the producers of ni-cd and ni-mh have not been able to construct a cell that can withstand charging with the AL15FC charger with a current of 8.5-10 A. This charger has not been used for several years due to the lack of quality cells from the 90s '. Great job :-) Regards :-).
Very good technical job .
This Bosch batpack can be fitted with up to 8 cells. Just arrange them in T shape, 3 on bottom, one of the top.
Okay, thank you so much for sharing, I will try it for my next rebuild.
These are my MOST favorite videos, I just love when someone restores something that is destined for the scrapper to fully working order!
Also I love when you clean up the things SO much that they're identical to brand new
I do have a few salvaged cells from laptops...
Maybe I'll try this?
For anyone wanting an amazing tool I would highly recommend GenScrew's electric screwdriver kit. It is an actual godsend: genscrew.com/kit
dont use laptop cells most tools require special high drain 18650s.
you need at least 10A drain 18650 for these maybe even more differs with the tool you using.
Ya lo hice todo perfecto. Gracias a tu ayuda. Se puede utilizar el mismo cargador? Me dio la impresión que cargaba lento. Lo voy a utilizar al taladro para acabar la batería y así probar cuánto tarda en cargar
Hola, como te fue con la prueba?
@@chimpora0623 no del todo bien. Me falta el tema de la carga. Utilice el mismo cargador pero no llega a completar la carga y el taladro se la consume rápido
Good conversion！I believe this type of BMS module only monitor the discharging voltage of the battery pack. When the pack is charged with Ni-mh charger, the end-of-charge pack voltage is determined by the charger which is why only 15.83v compared to imax b6's 16.8v. 15.83v definitely not an ideal fully-charged 4s li-ion pack .
The 18Volt batteries in my DeWalt are failing fast. Need to see if this trick will work for them too.
It will, but use the correct BMS and correct batteries.
www.amazon.com/DEWALT-18v-20v-Adapter-DCA1820/dp/B016K1UD0E
You can use the Dewalt 20v max batteries with it using this.
excelente!genio total mejor que el original saludo de chaco kapo.
Genial tu trabajo y video. Muy interesante y explicado en imágenes. Saludos cordiales desde Lebu Chile
Maybe you can open up the charger and see if you can change the output voltage to get more voltage out of it. I am sure the circuit can be tweaked to get more output and that will charge the new cells higher and give you more run time. I am pretty sure it is a switching mode charger. Just an idea...
Okay, Nice idea, I will made a modify on this charger. Anyway thank you for sharing!
Good job. I have just done a very similar rebuild on my old Bosch 9.6v batteries. One thing I did that you didn't is incorporate a LED charge indicator. I also set it up so I can optionally charge using spec for the 3S bms 12V DC input via the BMS (5.5mm jack), or with my Imax B6 (direct connection to the cells via Dean connector + JST balance connector).
See also my reply below to Kaziomiesz
Which charger would you use to charge 3s bms 12V via 5.5mm jack?
@@marahutti7465 I have come to the conclusion that the simplest way to go is to pick up a cheap (~ 5 bucks/pounds or so) Li On charger rated for 3S = 12.6v, these normally come with a 5.5mm jack plug. I did try an original charger for a 14.4v drill, (4S rebuild), its spec output V was nominally ok at 17.5V (BMS spec 16.8-18V), but it wouldn't charge the rebuilt battery, green LED came on but not red charging led. Maybe blocked by the bms actually now I think about it, when I measure the output V acros the charger terminals without load it was about 18.5v.
Using a Li IOn dedicated charger avoids issues over the differences between charging Ni Cad and charging Li IOn, as per other comments here...
Heyyy Dear u r perfect Man. I wanna say something about NiCd battery charger. Yes it is possible but u can charge with it Just 10 15 times. U can arrange New adapter 16.8 V or 19.6(laptop battery charger with step down or without step down). NiCd charger kills ur batteries. I like ur videos and follow u 👏👍😊. This is my experience. 😉 U r better than me. Maybe U know 1 miilion things. I know 10 things. Sincerely. 👍
Thank you for sharing your experience!
U r welcome Perfect Man 👏👍
Brilliant idea i have sake drill needs battery upgrade
Do you have the link to BMS
Cuanto tiempo duraron tus celdas con ese cargador (el original)?, Las mías menos de 10 cargas y fallaron dos celdas, tuve que agregar a la batería un conector DC jack y cualquier cargador que entregue entre 17 y 20 volts DC a 3 ampers me sirvió
Y como.hiciste o haces para saber cuando.esta.csrgado.al.100
@@ramiroalvarez7797 el cargador original tiene un indicador de carga y de carga completa
@@luisosorio9991 ha muy byeba suerre....a mi se me rompio tambueb el cargador
لا إله إلا الله وحده لا شريك له، عدد خلقه و رضى نفسه و زنة عرشه ومداد كلماته. صل على رسول الله.
Must be your name Mr professional, very good job.
Thank you for name, but I am still learning more.
Now I respact you more my friend because we are everyday learn something new.
@@gear_show is
@@gear_show r f
@@gear_show tum kya dikha rahe ho
I love UA-cam, there's a lot of smart people in this world and most of the time they can put their brains together and do great things. Careful though 'cause there's a lot of bullshit too.
Johnny J тооиоттт
Smart people don't leave tools in the rain.
Да уж,не поспоришь,чего чего а всякой бредятины хватает
@@ИванСергеев-д5о Мне тоже нравится, как мы можем общаться на многих языках
গট
hi your shows 15.49 v at the bms + - port but mine shows 12.65v, all the other volts 0, 4.2, 8.4, 12.6, 16.4 on the bms show correctly what is the problem is it a bad board, wiring was done as you have shown
Very professional job!
excelente video. It´s very good video. Es ist ain sehr gutes video.
Cheap and amazing restoration congratulations
Thank you!
very good. thank. very nice job
The NiMh/NiCd charger won't give a full capacity charge but the US military only charges lithium cells to about 89% of capacity for longer life. You'll get fewer minutes per charge but many more charges - it's a trade0off.
very clear tutorial
Good job 👍
Thank you!
awesome bro
Gracias amigo. Soy de Argentina y tengo una similar Bosch otro modelo pero la misma batería. Luego de terminar se puede utilizar el mismo cargador?
Great job worth watching
Glad you enjoyed it!
Excellent work👍👍👍. Thanks for sharing.
You're welcome! thank you!
👏 Excellent job, keep going. Where you live? I have 2 drills need to be repaired. You might help me to repair them.
Job well-done
if you don't mind sending the batteries connection diagram and how to
connect them to BMS pls.
When you buy the BMS, the diagram comes with it.
All different BMS have different connections.
Сверление не показатель, надо закручивать саморез 100 мм. Обязательна переделка зарядного устройства, другой тип аккумуляторов. Но все равно лайк за продление жизни, Bosch хорошая фирма.
как правильно выбрать батареи и платы? по каким параметрам
NICE AND CLEAN JOB.
Also another one i made 4S 2P with 40Amp BMS to my old Hitachi 16V drill machine
Great work learnt things about electronics but would it be more economically to get new one
LOL, don't marry a virgin woman and have children with her, just marry a single mother with many kids and save the hassles of making babies 😫✌
Boa tarde aí eu pergunto , podemos usar o carregador da maquina para carregar as novas baterias
Cant have enough of your videos man:D keep up the good work
You still need videos like this more?
@@gear_show yes i will answered yess
i really like all u video ... i from malaysia pray for malaysia covid-19 🙏
I hope everything get better soon, you should take care yourself and your family 😘
@@gear_show make sure i take care .. hope everything can be okay ... thank you
Bravo, excellent travail. Bon courage
Mr. Gear Show can you please tell me what BMS to use for a 18V battery?
By the way great job and videos.
Hi João Pereira! You can buy BMS 50S50A or 50S40A or 5S30A. And BMS dimension should be fit battery housing. Anyway thank you!
@@gear_show Thank you very much! Stay safe
I would have thought your spot welder would have worked for the broken battery treminal.
Greetings from Malaysia 😍
Dri mna ?
The white element at the end of two black wires is a thermistor. Please place this element as close to the battery cells as possible. It is used to measure temperature during charging. If the cells are damaged, overheating will occur, then the charger will stop charging and may save you from fire.
Oh that is very importance thing, thank you so much!
Yes li-ion charger more than good than ni-cd charger.i d like your videos 👍
Creo que las baterias de litio necesitan un corte de corriente de carga al llegar a Vmax =4.2V
Los cargadores NiCad suelen dejar una carga de goteo que podria estropear las baterias de Litio.
Si, agradezco tu bien explicacion
Yo creo que no pasa nada, para eso está el BMS, que corta al llegar a 4.2v
Please explain the function of the backing soda when cleaning plastic parts.
Can washing soda be used?