Hi Micah, I cant thank you enough, in 6 months time I went from total newbie not understanding a thing to a competent person ready to build my own ebike from scratch. Between this channel and EbikeSchool, your book and Vruzend there was enough material to keep me busy interested and learning for days upon end, and I enjoyed every bit of it and still at it. There is one subject that keeps eluding me and that is controllers, I dont know if you had that covered already on your channel I couldnt find it and I would love to learn a bit more about that. And while on the subject, what are the chances of you developing and offering a product like that for sale? Thank you.
Hello Lynda, I'm a newbee to this thread and everything still looks like magic to me. I am amazed at your recorded successes. I wrote to the presenter but have not heard from him. Can I buy one sample of your own build 72V battery to help me "step by step" in studying the procedure as a newbee. Also, where can I buy all the required parts from? Where store sells them? If you send me your phone number I can also call you. My name is "Bill", I'm in New York and my email is cctvwholesaler@gmail.com Thank you.
@@D_Onibokun the only good way to learn about building battery packs is to buy his book, it is by far the cheapest, shortest and most safe way of learning ALL you need to know about lithium packs. It covers absolutely everything, from basics of lithium chemistries and different types to sourcing, ratings, building and construction methods, management, connections, charging, everything and anything to do with lithium batteries is covered in that book. Cheap too, best 20 dollars you will ever spend. Book is "diy lithium batteries, how to build your own battery packs" by Micah Toll , available on amazon, he has a couple of other good books too. Dont know what parts you are looking for but plenty of websites around the world sell lithium cells, one of them is vruzend.com or co.uk and they also sell some other great stuff like assembly kits for builings complete packs, bms, chargers etc. Read that book and watch few of the uploads on this channel and you will have no problem understanding where and what you want to do. Research and discovery is the next best part of the journey besides building, for me at least.
@@MrNobody_1618 first of all, you need to consider the basic cost of materials and battery cells. Then the manhours to build it, and then the final manufacturing that ensures minimal hazards for the user once they install the battery to an appliance. When you do it yourself you can jsut jerry rig whatever idiotic bomb you desire, but as an actual industry supplier you need to achieve certain safety standards. This all costs a ton of money, especially when you aren't a mass producing manufacturer. Price always escalates exponentially when you go up in size and complexity per unit.
What size of nickel strip did you use for the connections. Was the parallel strip the same size as the series strip ? Looking to do a similar project for perhaps a 150- 200cc equivalent. Thinking about a123 cells or using a electric car pack. Thanks. By the way did you ever finish this project ?
@@jcnorth take a look at batteryhookup.com - they have a steady supply of standard new cells, plus a fast changing stock of salvage stuff from ev's and industrial recycling. Have to check frequently if you want to snag the best deals on the non standard stuff.
I think he is placing it where the motor/gas tank goes so when it is in motion the air going around it will act like a cooling system but just a guess on my end
MJ1's are not high drain cells by any stretch. Also, with this hexagonal packing scheme, the batteries near the center of the pack will get a lot hotter than those on the outside. That's of course dependant on how much power is charged or discharged, though.
20S12P with 200 amp discharge, 72 volts 36Ah ... I just purchaesed 3 of your books on Amazon... I am looking forward to building a battery for the Luna Galaxy Paint I'm gettin. Thanks for the video's.
I have seen many battery making videos. this one being one of the most safety oriented ones. others use really unsafe methods of connecting the cells, ignoring the possibility of error and so on. thank you so much for a good video!
Can't wait to see the finished product because I've been wanting to do this for a while now¡! Thanks for doing it and getting all the important details right... That's helps alot. 😊👍🏻
I love the simplicity of your videos, I just built my first mountain bike conversion and with your video on how to build power packs , I’m confident I can make a proper power supply for my 2000 watt hub system, I’m a subscriber and I give this video 2thumbs up 😊
actually since lithium batteries are explosive if cut or damaged, people are researching new types of batteries with even higher energy densities compared to li-on. The guy who worked on the li-on battery helped with a new battery based on glass and sodium and it has 3x higher energy density compared to li-on. www.forbes.com/sites/unicefusa/2019/12/26/qa-austyn-weiner-in-senegal-with-unicef/#57ed73ae59e3
Why don't you build a generator or put a generator on one of these bikes so you never run out of battery power they build generators like that for homes that keep recycling electricity they never run out of juice once you plug it in and get it going you can unplug it and it stays running right off its own generator can't you do that with a bicycle and electric bike put a generator on it never run out of power or your batteries are always charged I'm sure you'd have to put in some kind of switching there so you don't over charge your battery and blow them up but you'd be able to figure that out
I had this question in your last video, but I think I know the answer now - Hi since this is latest video I hope a get a response 😅 Basically I have a 14s 2p battery with mj1 3.5ah 10A cells with a 30a bms and 1500w motor Basically if I give to much throttle the bms is switching the power off and I need to unplug and plug back the battery otherwise the power won't come up Do you know why this is happening and what I could do to fix it Thanks in advance
The battery voltage rating is: • 14s*4.2Vmax= 58.8Vmax • 14s*3.6Vnom= 50.4Vmax • 14s*2.5Vmin= 35Vmin The battery current rating is: • 2P*10A=20A Power (W)/Energy (V)=Current (A) • 1,500W/58.8Vmax)=25.5A • 1,500W/50.4Vnom)=29.8A • 1,500W/35Vmin)=42.8A The 14S/30A BMS rating is 50.4Vnom*30A=1,512W To put it simply, you've connected a load greater than the system rating. Especially considering that electrical circuits are typically specified with a 25% safety margin. Yours has almost none. Not all Battery Management Systems are created equal. While the BMS is _rated_ at 30A, it may not be up to pumping that much power on a continuous basis. Most likely, the BMS is disconnecting on over current. What's unseen is how your batteries are being damaged. They may be *rated* at 10A, however they're *capable* of discharging at higher rates, up to and including that of a dead short. When goosing the throttle to full power, depending on state-of-charge, you're pulling between 25.5A and 42.8A from a pack rated at only 20A. This generates a lot of heat, and heat does two things: If there's enough of it for a sufficient duration, there will be fire. However, without fire, the life of the cells is being drastically shortened. You have two choices: *Option A:* Decrease the motor power rating by governing it down, or replacing it with a smaller motor. *Option B:* Go to a 3P or 4P pack, as well as a 50A BMS. Of course, you could always keep your "foot off the gas", so to speak. Best of luck.
Hola Micah, Merry Christmas to you and yours, I've made it just under the wire (11:27PM 12-25-19). Glad to see you back, healthy, wealthy and having fun. I have 3 words;eHONDA eHONDA eHONDA!!!!! Really want to see this project's progress. This video is a great continuation and contribution. I'm more excited now than before!!.I don't like the look, or how NOT nimble they are, but for $500, I couldn't pass up an eDrift Fat Tire Scooter. It needs a larger pack than the 60V 10ah Li-Ion it has at the moment, so this video may be instrumental. Do you have any thoughts on overvolting that eBike's 1500W Brushless motor's speed controller? BTW; something I've been doing to my 57V (soon to be 61V) "Vruzend" packs, since I live in So. Cal. ie the Mojave Desert, is NOT completely sealing the battery packs I build. I leave 2 sides open, so there is airflow through the pack. On my little 32mph 750W Brushed Motor CURRIE Schwinn "TESLA" eScooter (stock was 36V/15mph), I also drill out/swiss cheese the bottom floor of the battery case, so air can get up into the pack and add even more cooling. Even in the 90-100 degree temps that I've run my eBike packs in this last summer, none got over ambient temp and my packs are as strong now as when I built them. Just a tip that I hope may help for those of you in hot climates. Now, heat shrink is cheap, so for this cold(er) time of year it's easy to seal those battery pack sides up & the holes in the battery tray and allow the packs temp to stay inside to help keep the pack warm as well. Then, just cut the sides back out for summer and only do the reseal job once a year. Thanks in advance.CheersBoots LangleyLa Mesa, ca.PS; Hey, I have a decent Resume myself;Mechanical Design & Machine Drafting (2 yr Tech School Degree), a lifetime of Automotive/Motorcycle Service, Repair & Restorations/ Racing , including several years as a Technical Editor (Cordura Publications/ Mitchell Auto & Truck Repair Manuals). Any need of a part time, Old, toothless, fat guy as a USA/So. Cal Editor of anything Electrical Transpo Related? Especially 2 wheeled? Just wondering!! ;-)Thanks in advance.PPS; I just spent 30 minutes typing and spacing and creating a completely readable message and stupid youtube turned it into an almost unreadable blob of text!! SIGH!
Micah nice build! Can you tell us about what BMS you used? It's sometimes hard to locate a high amp discharge BMS for these applications. Also what steps did you calculate for your amp draw with controller? Enjoying this build, good luck!
A good tip to customize blue shrinking tube is that you can glue them together with superglue to create really big tubes or custom shapes. Note that the superglue won't release when hot air is applied l. Happy building!
Thanks Micah, I have 3 not working, good, nearly new ebike batteries: (52v15ah, 52v14ah, 36v8ah) plus a few small packs for a few more cells, and a spot welder, i want to combine my cells/packs to get a 72v battery for a new upgrade to an old 2014 A2B Alva+ with the 24" MXUS 3kw kit. what should i have, or do, to best build my battery. As far as shaping it, mainly, the original battery on these bikes wrapped around a beautiful strut under the rear rack, so if i could shape it to do that again that would be optimum.
Hello, how are you? I came to your Channel researching DIY batteries for Bikes and conversion for electric bike ... Congratulations on the video! My name is Raul Júnior and I am from Brazil, student of Electroelectronics and I really want to professionalize myself in this follow-up, and it is very complicated to find study materials here in Brazil, as well as inputs to start producing or doing test and field labs. (Forgive my grammar, I don't have English fluency, I used a Translator!)
so i have a 14s24p Li ion battery with a standard 5A charger and if my BMS supports for example 30A Chargepower i can use a charger with 30A safely at home? samsung 25R cell btw
OMG, how much time did it take you to put this together?? I am putting together a small(er) 14S pack, but it's taking me forever since i don't have all the tools on hand plus I am not yet too comfortable with all the techniques. This is just inspirational!!
What about heat dissipation? And short protection? You know if something goes wrong that’s allot of burn time there. Heat shrink is nice but not puncture proof. Obviously you are experienced with battery packs and I’m a noob. So could you explain your thought process on safety please.
2:40 It's good that you're wearing gloves, mr. Ghee made his 72V nom. with his greasy hands. but he only uses it for vaporising copper wire! 8:09 solder has 10x resistance of copper-copper connections, such as crimping. so, where possible, better to crimp! minimise connections, so if the BMS wire isn't long enough to reach the terminals, replace it with a longer one, rather than extending it.
HEY MIKE, I HAVE 3000WATT CYCLONE MID. KIT ON MY BIKE, AND I RUN 2 PARALEL{ (3X18V 9AMPS=54V 9AMPS)=54V 18AMPS}= 972 WATT HOURS? MILWAUKEE 18V. 9AMP BATTS. WILL THE CYCLONE MID RUN THE SAME DISTANCE , BUT SLOWER IF I TRY 3 PARALEL{(2X18V 9AMP=36V 9AMPS)=36V 27AMPS}=972 WATT HOURS. CAN THE CYCLONE EVEN RUN ON 2 18V 9AMP BATTS?
Did you test it before wrapping it up??? Lovely build mikey I'm 'borrowing' your bendi-battery-build of that's OK sir? The reason for it is that for years I suffered the teasing 48v hub motor and 48v 11ah battery. I use those values loosely as at full throttle it effectively is a 42v battery. When fully charged to 56.4 it performs lovely.... For a few minutes then performs like a damp squib.. In my view I want a battery that has a constant minimum output of around 60 v and the ability to provide 1500 Watts at max output both continuously or until at max discharged but with a reserve tank ability. Good sir HOW IS THIS POSSIBLE PLEASE.... X Regards David wiles In the UK (on private roads)
Hello all. I want some help about Nickel strip size. I plan to assemble 72V 42Ah battery pack with LIFEPO4 Cells. The series parallel combination is 23S7P. Now, I received 0.15 thick nickel plated strip with weld machine. What thickness is OKAY for my battery pack. Please reply. (Battery application- 3000watt hub motor of bike). Thanks
Hi guys, i have a question, thx in advance if youll help. Im building a ebike, with my own battery pack, 72v 20s 3p (80a continuous, 105A peak) with 18650 cells sony vtc5a, what BMS do i have to get, i found one on aliexpress from Daly, and i can pick common port (2 wire) and separate port (3 wire) . Which one to buy, 2 or 3 wire version? Do you have another BMS to recommend? Thx guys, im new here and in e bike space, cheers
Bought your ebike book. Watched many of your videios. Liked & subscribed and have really learned a lot. Building folded 36V/20.4AH/10S6p ebike battery to convert my existing mountain bike to front drive ebike. One question on this video. The white insulated wire you used as parallel connector near end looks like dual 14 Gauge lamp cord. Shouldn't it be 10-12 gauge for the amount of current your pack is going to deliver?
That is a beautiful Bike my friend, Hate to see it get taken apart. I have an 82 and 84 cr125 complete. I was going to redo it so its showroom quality or (yup, convert to electric). I know you are very educated about electric, Does it not scare you to use Lith ion? Mine are lipo because I see so many fires. Any advice?
Hi Micah. I have two of your books. I'm now ready to order my first batch iof 18650's can you point me in the direction of a supply of good quality 18650's please...
I'm just starting to convert my old year 80 into an electric street bike so of course I have to source some street tires and appropriate lighting but I'm looking forward to the challenge. Hopefully I win one of your books. Would probably be really usefull
I have a 48v 1000w rear motor hub in which I'm using 60v30a(16s10p) to push it. The problem is that it's getting hot and, I guess, the magnets are swelling up(expanding) and causing the motor to seize up. Once it cools it will spin again. What's going on? Great vids by the way
I have a 48v 1000w rear motor hub in which I'm using 60v30a(16s10p) to push it. The problem is that it's getting hot and, I guess, the magnets are swelling up(expanding) and causing the motor to seize up. Once it cools it will spin again. What's going on? Great vids by the way
2000 watt or more rwd hub motor (12 ,inch or larger tires and wheel) and even heaviest scooter etc. with iron chassis; it will definitely fly, at least 55 Kph without limiter,no whatsoever problem about up hills. My RWD 2000 watt hub wheel scooter with very heavy iron body have 6 ( 12v and 20 amp) lead acid battery (Each 7.5 Kilos) 45 kilos in total. With that configuration; 2 adult guys at 150 kilos in total + 2 sand bags around 100 kilo in total, it pulls great. With lithium batteries you are gonna safe at least 40 kilos and in this configuration it is also 40 Amps. Distance is gonna be way longer, speed is gonna be much better.
It so interesting to see your videos,I really wanna learn how to build my own battery when the time my E-bike battery failed.I have 48V 15 AMH on my hey bike ranger 500 w motor.Looking for up grade for high voltage and amp hour battery and bigger 750 w motor.
Good evening, I made a 48 volt battery, but after a full charge it does not exceed 51 volts. What is the problem? Thank you, my friend. I follow you from Egypt
Why do you connect all the batteries when you do the parallel welding? For efficiency? Couldn't you just connect the extremity of the 20s batteries in parallel? If you can explain why i can go to bed less stupid :) Great video Thank you !
Hi please help. I have a 48v 1500w ebike build and planning to buy a new battery. The one im looking at is a 48v 28ah 1000w battery, will it work on my current build?? Please help
Hi guys, I'm a beginner and I'm building a battery pack with salvaged cells from laptops very similar with this one 72v as well. I have a question: Why he spot welded the the batteries positive with negative even in parallel? For instance the whole pack is one positive up and one negative up. I didn't understand. Could someone explain to me? ELI5 peharps. Thanks!
Hi, I have a 1500watt 72v motor and I would like to get the most out of it. What battery configuration should I be using. At the moment I am using led acid 6 * 12v 10ah. I feel like I can get a lot more speed out of the motor that’s why I am asking. My controller I am using it rated for 72v 1500w.
I'm starting to convert/ build an electric motorcycle - my goal is max speed 70-80km/h and 40-50km range, but I don't know from where to start, I hope I win electric motorcycle eBook.
How do I replace the 6x 12v lead acid batteries with this in my ebike? The connection type is different. Also, will I be able to use the same charger? (72v 20ah) Thanks
Question. New to doing packs. You do series first, then you do parallel. Why not do parallel, then connect the parallel blocks in series? Wouldn't that be less welding as you would only have 2 connection from block to block. To me, it looks like you built 140 cells in series, what am I missing :)
Shouldn't the BMS be outside of the battery pack? won't shrinkwrapping it in with the batteries over-heat it? I'm new to the channel and don't know how hot these will get. Looks cool though. I was considering buying a Zero FX this summer but now I'm reconsidering.
What gauge wire did you use to your XT90 connector? I'm trying to build a battery for an electric motorcycle with a 5kW motor. All the batteries I'm seeing online say 60A continuous which is what I need, but then they only have 12 gauge wire...
Bro i am india, I am planning to make an electric car using 72 v 5 kw BLDC motor, And i am watcing so many video for making battery pack, But this is one of best video i have watched till now.. Great work..I would like be in your contact..
A query - How can we reduce our battery size? One way is by using DC -DC booster but efficiency is 80-86% only. Any other possible way to get same 72V and 20AH battery ?
i just purchased this type of battery... $500. my ebike came with (6) 12v acid Motorcycle size batteries (Heavy). i didnt understand the concept of the auto shut off on the charger. so i left it plugged in even after charge was complete. well, one day it stayed charging and cooked my batteries and it left me with damaged batteries which didnt hold charge and i use it to commute to work (8 miles round trip) i tried to replace the batteries but they were hard to come across and it was difficult to understand all this volt, amp talk! so i purchased a 48v battery pack and learned that i needed a 72v. needless to say, I FIGURED IT OUT! i recommend this DIY battery packs! its not as heavy, and performs better than the acid batteries. i hope this encourages somebody to go with these types of battery packs!
Hai Micah... I was reading ur book DIY Lithium batteries... I have a doubt that if Balanced chargers do balanced charging of cell groups then function of BMS is only need to cut off the discharging of cell or there is any other drawback with balanced chargers that BMS could rectify it?
I have a question, I made a 72v batterie out of 6 12v batteries in series for a e bike, my problem is that by battery die really quickly. Is there anyway I can make those last longer with a different wiring? Or do I need those small 3,6v battery? Thank you all!
So I assume your motorcycle will be drawing less than 90amps which will only net you between 8.8 kW at max 84v charge. I say that since he has a XT90 connector that’s only rated for 90A. People often forget about this fact.
Great video Micah. I learn more from you and your battery build videos than anyone else. You actually teach by explaining each part of the process. Great job! Thanks!
you can hawe a new cells from china bud they hawe wery diference betwen of capacity when you whil hawe wery good pack you mast oll cells carge and discharge and mesure you du this one time and ride longere::::::: i thing ok???? Mali ste na mysli: rozdielmi 9/5000 differences capacity
TY for another video . You say cell must be at the same V b4 assembly ; getting 00's cell at exactly the same V is ideal but unlikely so what is a range that is acceptable 25mv ? the cell i have purchased have 3.226v-3.236 ATM , it's going to be a couple weeks b4 i have the missing hardware and assemble the pack , i will mesure them again then , that will also tell me if the $ i spent was worth them , cheers & ride safe
Hi really Great, But my idea is 1. you should of add cell level fusing system to battery long life ....yes Offcource yiu might use fuse at battery pack on total voltage and ah but cell level fuses will save the rest of the cells if there is any Hazard/blast/short circute etc... 2. You should of add any third party spar sensor parts to maintain normal temparature. Yes these temparature sensors are not available but you kindly do research how to maintain to keep normal temperature between cells. These two points will give batterypack long life running, Safety, avoid any danger incidents. It's just my opinion dude.
Hai bro, i'm ezy from indonesia, i have a quetion for you.. Whether the battery pack can be used as a variable like variable power supply, so if we need a power 24v we just click 24v button, if we need 36 v we just click 36v button according we need in one battery pack and how to make it? Thankyou 😊
LG MJ1 cells go for around 5 dollars. 240 cells is 1200 dollars. If you get 1000 charge cycles that's 1.20 dollars per charge. Those old Hondas get very high mileage and range isn't an issue because of gas stations. Is there a goal beyond making an electric motorcycle?
Hey man I love your videos I would like to get your DIY lithium battery book I think it would help me out a lot to learn everything that I want to know
My request to you to make a d i y battery build.. dimension mast be 1inch wide 1 inch height. And two feet long.. the battery must be 48 volt with quality BMS and battery.. My humble request to you to make a simple video this video looking very complicated... I want to run 1000 watt motor with that battery so help me.. I have a bicycle and I just want to hide all the electronic equipment inside my bike to other people can't recognise is my E bike fron outside. I really need to created this on my house and I don't want to take any risk. I trust you sir please teach us
Nice video. Very informative. I'm building a escooter now and working on my pack. I am uber interested in our book on solar. I hope to cut my dependence to fossil fuels in 202.
You must have missed catching it on film... Yeah yeah, sure... I think you just had trouble soldering it. Or it took too long for it to be considered good for the cells or even safe... The thing is I wanted to see what soldering iron you used and in the end, I couldn't :3
I love how every diy battery pack looks like a bomb while making it
On that note. When fully charged, there is roughly 10MJ of energy in this pack, which is about equivalent to a Coca Cola bottle Molotov Cocktail :)
@rbc21 Yeah, pooly used vapes knows that
well, it basically is.
@@vex123 True xD
@B. Lim That dude was a little more insane then a 300w cloud but yeah
Hi Micah, I cant thank you enough, in 6 months time I went from total newbie not understanding a thing to a competent person ready to build my own ebike from scratch. Between this channel and EbikeSchool, your book and Vruzend there was enough material to keep me busy interested and learning for days upon end, and I enjoyed every bit of it and still at it.
There is one subject that keeps eluding me and that is controllers, I dont know if you had that covered already on your channel I couldnt find it and I would love to learn a bit more about that.
And while on the subject, what are the chances of you developing and offering a product like that for sale?
Thank you.
Hello Lynda, I'm a newbee to this thread and everything still looks like magic to me.
I am amazed at your recorded successes. I wrote to the presenter but have not heard from him.
Can I buy one sample of your own build 72V battery to help me "step by step" in studying the procedure as a newbee. Also,
where can I buy all the required parts from? Where store sells them? If you send me your phone number I can also call you.
My name is "Bill", I'm in New York and my email is cctvwholesaler@gmail.com
Thank you.
@@D_Onibokun the only good way to learn about building battery packs is to buy his book, it is by far the cheapest, shortest and most safe way of learning ALL you need to know about lithium packs. It covers absolutely everything, from basics of lithium chemistries and different types to sourcing, ratings, building and construction methods, management, connections, charging, everything and anything to do with lithium batteries is covered in that book. Cheap too, best 20 dollars you will ever spend. Book is "diy lithium batteries, how to build your own battery packs" by Micah Toll , available on amazon, he has a couple of other good books too.
Dont know what parts you are looking for but plenty of websites around the world sell lithium cells, one of them is vruzend.com or co.uk and they also sell some other great stuff like assembly kits for builings complete packs, bms, chargers etc. Read that book and watch few of the uploads on this channel and you will have no problem understanding where and what you want to do. Research and discovery is the next best part of the journey besides building, for me at least.
@@D_Onibokun we can provide.
How did you learn all about electricity?
Now i understand why they charge 2000$ for these battery's
No I don't it look really easy when you know what your doing and pretty fast too !
convince and time
@@MrNobody_1618 first of all, you need to consider the basic cost of materials and battery cells. Then the manhours to build it, and then the final manufacturing that ensures minimal hazards for the user once they install the battery to an appliance. When you do it yourself you can jsut jerry rig whatever idiotic bomb you desire, but as an actual industry supplier you need to achieve certain safety standards. This all costs a ton of money, especially when you aren't a mass producing manufacturer. Price always escalates exponentially when you go up in size and complexity per unit.
What size of nickel strip did you use for the connections. Was the parallel strip the same size as the series strip ? Looking to do a similar project for perhaps a 150- 200cc equivalent. Thinking about a123 cells or using a electric car pack. Thanks. By the way did you ever finish this project ?
@@jcnorth take a look at batteryhookup.com - they have a steady supply of standard new cells, plus a fast changing stock of salvage stuff from ev's and industrial recycling. Have to check frequently if you want to snag the best deals on the non standard stuff.
lol the individually packaged cells, that’s a lot of cardboard
Hey! I'm a Happy Winner !!!! I send you an email, Mikah. Thanks in advance.
Folding the pack over like that is kinda terrifying, why did you do it that way instead of connecting the 2 packs in series?
He wanted tighter packaging due to the space constraints.
Hi James. Didn’t really understand your comment. Maybe cause I’m a newbie. Could you explain further?
What about cooling, Sorry I am New, but i have heard, generally high drain batteries emits lot of heat.
I think he is placing it where the motor/gas tank goes so when it is in motion the air going around it will act like a cooling system but just a guess on my end
12 Parallel, this configurations will help keep cooling down.
I am sure whatever housing he builds for the battery will also channel air flow to assist with cooling.
Nice job
MJ1's are not high drain cells by any stretch. Also, with this hexagonal packing scheme, the batteries near the center of the pack will get a lot hotter than those on the outside. That's of course dependant on how much power is charged or discharged, though.
20S12P with 200 amp discharge, 72 volts 36Ah ... I just purchaesed 3 of your books on Amazon... I am looking forward to building a battery for the Luna Galaxy Paint I'm gettin. Thanks for the video's.
I have seen many battery making videos. this one being one of the most safety oriented ones. others use really unsafe methods of connecting the cells, ignoring the possibility of error and so on. thank you so much for a good video!
Sure, laying a whole battery pack on the bent connections is way safer than other methods
You like those orange gloves huh.
@@mateng7707when did he do that
Can you text me the online shopping centre where you bought the 18650 battery .Please
Also the spacer you have used.
I spent 11 mins here and he didnt even demonstrate the use of the damn thing...smh... highly disappointed Mr. Ebike, highly!
if you touch either pole youll die pretty quick.
@@joshbrock2663 no
You wanna build me a battery? I want a 72v 132ah battery for my 2023 super Soco tc max
Can't wait to see the finished product because I've been wanting to do this for a while now¡! Thanks for doing it and getting all the important details right... That's helps alot. 😊👍🏻
Very good tutorial. Thanks.
I love the simplicity of your videos, I just built my first mountain bike conversion and with your video on how to build power packs , I’m confident I can make a proper power supply for my 2000 watt hub system, I’m a subscriber and I give this video 2thumbs up 😊
Can I just add cells to a battery pack I'm using in a parallel connection only and not doing a series connection?? Thank You
this is the future. hope lithium mining can become more sustainable for ecology and people.
actually since lithium batteries are explosive if cut or damaged, people are researching new types of batteries with even higher energy densities compared to li-on.
The guy who worked on the li-on battery helped with a new battery based on glass and sodium and it has 3x higher energy density compared to li-on. www.forbes.com/sites/unicefusa/2019/12/26/qa-austyn-weiner-in-senegal-with-unicef/#57ed73ae59e3
Lithium mining is not even close to what oil is doing to the nature and human.
@@username-rs4vf I think a new sulfer battery was created recently
Why don't you build a generator or put a generator on one of these bikes so you never run out of battery power they build generators like that for homes that keep recycling electricity they never run out of juice once you plug it in and get it going you can unplug it and it stays running right off its own generator can't you do that with a bicycle and electric bike put a generator on it never run out of power or your batteries are always charged I'm sure you'd have to put in some kind of switching there so you don't over charge your battery and blow them up but you'd be able to figure that out
One day I'll replace the two-stroke gas motor on my Paramotor with a battery pack driven electric motor.
Cool, make some videos about it! I would love to see thatà
I assume it would be a lot better feeling flying silent rather than with that noise.
With lithium ion battery it wouldn't be a nice Idea. Hopefully in future with newer battery technologies it would be possible.
I had this question in your last video, but I think I know the answer now
- Hi since this is latest video I hope a get a response 😅
Basically I have a 14s 2p battery with mj1 3.5ah 10A cells with a 30a bms and 1500w motor
Basically if I give to much throttle the bms is switching the power off and I need to unplug and plug back the battery otherwise the power won't come up
Do you know why this is happening and what I could do to fix it
Thanks in advance
The battery voltage rating is:
• 14s*4.2Vmax= 58.8Vmax
• 14s*3.6Vnom= 50.4Vmax
• 14s*2.5Vmin= 35Vmin
The battery current rating is:
• 2P*10A=20A
Power (W)/Energy (V)=Current (A)
• 1,500W/58.8Vmax)=25.5A
• 1,500W/50.4Vnom)=29.8A
• 1,500W/35Vmin)=42.8A
The 14S/30A BMS rating is 50.4Vnom*30A=1,512W
To put it simply, you've connected a load greater than the system rating. Especially considering that electrical circuits are typically specified with a 25% safety margin. Yours has almost none.
Not all Battery Management Systems are created equal. While the BMS is _rated_ at 30A, it may not be up to pumping that much power on a continuous basis. Most likely, the BMS is disconnecting on over current.
What's unseen is how your batteries are being damaged. They may be *rated* at 10A, however they're *capable* of discharging at higher rates, up to and including that of a dead short. When goosing the throttle to full power, depending on state-of-charge, you're pulling between 25.5A and 42.8A from a pack rated at only 20A.
This generates a lot of heat, and heat does two things: If there's enough of it for a sufficient duration, there will be fire. However, without fire, the life of the cells is being drastically shortened.
You have two choices:
*Option A:* Decrease the motor power rating by governing it down, or replacing it with a smaller motor.
*Option B:* Go to a 3P or 4P pack, as well as a 50A BMS.
Of course, you could always keep your "foot off the gas", so to speak.
Best of luck.
Hola Micah,
Merry Christmas to you and yours, I've made it just under the wire (11:27PM 12-25-19).
Glad to see you back, healthy, wealthy and having fun.
I have 3 words;eHONDA eHONDA eHONDA!!!!!
Really want to see this project's progress. This video is a great continuation and contribution. I'm more excited now than before!!.I don't like the look, or how NOT nimble they are, but for $500, I couldn't pass up an eDrift Fat Tire Scooter. It needs a larger pack than the 60V 10ah Li-Ion it has at the moment, so this video may be instrumental. Do you have any thoughts on overvolting that eBike's 1500W Brushless motor's speed controller?
BTW; something I've been doing to my 57V (soon to be 61V) "Vruzend" packs, since I live in So. Cal. ie the Mojave Desert, is NOT completely sealing the battery packs I build. I leave 2 sides open, so there is airflow through the pack. On my little 32mph 750W Brushed Motor CURRIE Schwinn "TESLA" eScooter (stock was 36V/15mph), I also drill out/swiss cheese the bottom floor of the battery case, so air can get up into the pack and add even more cooling. Even in the 90-100 degree temps that I've run my eBike packs in this last summer, none got over ambient temp and my packs are as strong now as when I built them.
Just a tip that I hope may help for those of you in hot climates.
Now, heat shrink is cheap, so for this cold(er) time of year it's easy to seal those battery pack sides up & the holes in the battery tray and allow the packs temp to stay inside to help keep the pack warm as well.
Then, just cut the sides back out for summer and only do the reseal job once a year.
Thanks in advance.CheersBoots LangleyLa Mesa, ca.PS; Hey, I have a decent Resume myself;Mechanical Design & Machine Drafting (2 yr Tech School Degree), a lifetime of Automotive/Motorcycle Service, Repair & Restorations/ Racing , including several years as a Technical Editor (Cordura Publications/ Mitchell Auto & Truck Repair Manuals). Any need of a part time, Old, toothless, fat guy as a USA/So. Cal Editor of anything Electrical Transpo Related?
Especially 2 wheeled?
Just wondering!! ;-)Thanks in advance.PPS; I just spent 30 minutes typing and spacing and creating a completely readable message and stupid youtube turned it into an almost unreadable blob of text!! SIGH!
Any tips on how to do 72v 54ah but 400amp or not possible working on 8000watt e-bike eventually I’d like to build my own battery for it
Same here. Looking at some 32700 cells for 6000mAh each. Should be less cells required for a 72-96v high Ah battery
Really interested to see what your typical range and max speed is on this build.
Micah nice build! Can you tell us about what BMS you used? It's sometimes hard to locate a high amp discharge BMS for these applications. Also what steps did you calculate for your amp draw with controller? Enjoying this build, good luck!
I want to see the whole process of building batteries and using them on Ebike. Can you make a video of it?
he just did
@@SupremeRuleroftheWorld where
A good tip to customize blue shrinking tube is that you can glue them together with superglue to create really big tubes or custom shapes. Note that the superglue won't release when hot air is applied l. Happy building!
I wanna rebuild this exact battery for my old honda
I should really get one of those Arduino spot welders... getting tired of soldering batteries.
I'm doing a project for school and we could really use those books!
Bro nice battery pack. I love it
I love all the videos you produce, whether building batteries like this one, or reviewing e-two wheelers. Keep 'em coming, please!
SUCH POWER MAN!!!!!!!😂😂😂
Link to the bms?
yeap. That AliExpress link does not match the one he used
here you go www.alibaba.com/product-detail/20S-72V-Li-ion-Battery-Management_60742136406.html
Wat the fack
2PAC is proud😂⚡
I cant wait to see the top speed of this thing! my brother in law wants to build one now! LOL
Someone show this to LG_Chem and watch them flip their shit... (Anyone who's seen the "don't buy it" campaign will get this joke)
this is DEFINITELY something I wish I had started learning a long time ago
Thanks Micah, I have 3 not working, good, nearly new ebike batteries: (52v15ah, 52v14ah, 36v8ah) plus a few small packs for a few more cells, and a spot welder, i want to combine my cells/packs to get a 72v battery for a new upgrade to an old 2014 A2B Alva+ with the 24" MXUS 3kw kit. what should i have, or do, to best build my battery. As far as shaping it, mainly, the original battery on these bikes wrapped around a beautiful strut under the rear rack, so if i could shape it to do that again that would be optimum.
1ST 😜👍
Hello, how are you? I came to your Channel researching DIY batteries for Bikes and conversion for electric bike ... Congratulations on the video! My name is Raul Júnior and I am from Brazil, student of Electroelectronics and I really want to professionalize myself in this follow-up, and it is very complicated to find study materials here in Brazil, as well as inputs to start producing or doing test and field labs. (Forgive my grammar, I don't have English fluency, I used a Translator!)
so i have a 14s24p Li ion battery with a standard 5A charger and if my BMS supports for example 30A Chargepower i can use a charger with 30A safely at home?
samsung 25R cell btw
Awesome sir..👌👌👌💪💪💪👍👍👍👍👍✌️✌️✌️....... I love Electric Vehicles......
Please tell me about battery-fuse
OMG, how much time did it take you to put this together??
I am putting together a small(er) 14S pack, but it's taking me forever since i don't have all the tools on hand plus I am not yet too comfortable with all the techniques.
This is just inspirational!!
What about heat dissipation? And short protection? You know if something goes wrong that’s allot of burn time there. Heat shrink is nice but not puncture proof. Obviously you are experienced with battery packs and I’m a noob. So could you explain your thought process on safety please.
Awesome video, learn a lot about battery building even thought I’m into electric skateboard. Your videos are very helpful
You make it look easy...what was the total cost of this battery?
2:40 It's good that you're wearing gloves, mr. Ghee made his 72V nom. with his greasy hands. but he only uses it for vaporising copper wire! 8:09 solder has 10x resistance of copper-copper connections, such as crimping. so, where possible, better to crimp! minimise connections, so if the BMS wire isn't long enough to reach the terminals, replace it with a longer one, rather than extending it.
I want to make my own motar cycle i want your book sir..!
Fine ,clean job ,……
Hlw bro...i have a E bike... 72v 20 ah.....so how much Li buttery pak making to buy....plz
Micah ... the Sunkko spot welder you linked to seems to be running off AC 220V ... I cannot locate AC 110V ... is this not available, do you know?
HEY MIKE, I HAVE 3000WATT CYCLONE MID. KIT ON MY BIKE, AND I RUN 2 PARALEL{ (3X18V 9AMPS=54V 9AMPS)=54V 18AMPS}= 972 WATT HOURS? MILWAUKEE 18V. 9AMP BATTS.
WILL THE CYCLONE MID RUN THE SAME DISTANCE , BUT SLOWER IF I TRY 3 PARALEL{(2X18V 9AMP=36V 9AMPS)=36V 27AMPS}=972 WATT HOURS. CAN THE CYCLONE EVEN RUN ON 2 18V 9AMP BATTS?
Did you test it before wrapping it up??? Lovely build mikey I'm 'borrowing' your bendi-battery-build of that's OK sir?
The reason for it is that for years I suffered the teasing 48v hub motor and 48v 11ah battery.
I use those values loosely as at full throttle it effectively is a 42v battery.
When fully charged to 56.4 it performs lovely.... For a few minutes then performs like a damp squib..
In my view I want a battery that has a constant minimum output of around 60 v and the ability to provide 1500 Watts at max output both continuously or until at max discharged but with a reserve tank ability.
Good sir HOW IS THIS POSSIBLE PLEASE.... X
Regards
David wiles
In the UK (on private roads)
Hello all. I want some help about Nickel strip size. I plan to assemble 72V 42Ah battery pack with LIFEPO4 Cells. The series parallel combination is 23S7P. Now, I received 0.15 thick nickel plated strip with weld machine. What thickness is OKAY for my battery pack. Please reply. (Battery application- 3000watt hub motor of bike). Thanks
new subscriber here, I like the the video and hopefully you can gave more tips on and some book on how to make DIY battery and Electric Motorcycle.
Do you sell kits for building batteries? IE do you sell the connectors, strips, BMSs, cells, wires, heat shrink, and everything?
Hi guys, i have a question, thx in advance if youll help.
Im building a ebike, with my own battery pack, 72v 20s 3p (80a continuous, 105A peak) with 18650 cells sony vtc5a, what BMS do i have to get, i found one on aliexpress from Daly, and i can pick common port (2 wire) and separate port (3 wire) . Which one to buy, 2 or 3 wire version? Do you have another BMS to recommend?
Thx guys, im new here and in e bike space, cheers
Mj1s are bullshiiiit. Low charging and discarging Speed with high temps. Not recommended.
Bought your ebike book. Watched many of your videios. Liked & subscribed and have really learned a lot. Building folded 36V/20.4AH/10S6p ebike battery to convert my existing mountain bike to front drive ebike. One question on this video. The white insulated wire you used as parallel connector near end looks like dual 14 Gauge lamp cord. Shouldn't it be 10-12 gauge for the amount of current your pack is going to deliver?
That is a beautiful Bike my friend, Hate to see it get taken apart. I have an 82 and 84 cr125 complete. I was going to redo it so its showroom quality or (yup, convert to electric). I know you are very educated about electric, Does it not scare you to use Lith ion? Mine are lipo because I see so many fires. Any advice?
Hi Micah. I have two of your books. I'm now ready to order my first batch iof 18650's can you point me in the direction of a supply of good quality 18650's please...
I'm just starting to convert my old year 80 into an electric street bike so of course I have to source some street tires and appropriate lighting but I'm looking forward to the challenge. Hopefully I win one of your books. Would probably be really usefull
I have a 48v 1000w rear motor hub in which I'm using 60v30a(16s10p) to
push it. The problem is that it's getting hot and, I guess, the magnets
are swelling up(expanding) and causing the motor to seize up. Once it
cools it will spin again. What's going on? Great vids by the way
I have a 48v 1000w rear motor hub in which I'm using 60v30a(16s10p) to
push it. The problem is that it's getting hot and, I guess, the magnets
are swelling up(expanding) and causing the motor to seize up. Once it
cools it will spin again. What's going on? Great vids by the way
2000 watt or more rwd hub motor (12 ,inch or larger tires and wheel) and even heaviest scooter etc. with iron chassis; it will definitely fly, at least 55 Kph without limiter,no whatsoever problem about up hills. My RWD 2000 watt hub wheel scooter with very heavy iron body have 6 ( 12v and 20 amp) lead acid battery (Each 7.5 Kilos) 45 kilos in total. With that configuration; 2 adult guys at 150 kilos in total + 2 sand bags around 100 kilo in total, it pulls great. With lithium batteries you are gonna safe at least 40 kilos and in this configuration it is also 40 Amps. Distance is gonna be way longer, speed is gonna be much better.
It so interesting to see your videos,I really wanna learn how to build my own battery when the time my E-bike battery failed.I have 48V 15 AMH on my hey bike ranger 500 w motor.Looking for up grade for high voltage and amp hour battery and bigger 750 w motor.
Folding battery lol. .that is the reason why seing battery explosion. .booommm bbooommm🔥🔥🔥happy new year
Good evening, I made a 48 volt battery, but after a full charge it does not exceed 51 volts. What is the problem? Thank you, my friend. I follow you from Egypt
Why do you connect all the batteries when you do the parallel welding? For efficiency? Couldn't you just connect the extremity of the 20s batteries in parallel? If you can explain why i can go to bed less stupid :) Great video Thank you !
Hi please help. I have a 48v 1500w ebike build and planning to buy a new battery. The one im looking at is a 48v 28ah 1000w battery, will it work on my current build?? Please help
Hi guys, I'm a beginner and I'm building a battery pack with salvaged cells from laptops very similar with this one 72v as well. I have a question: Why he spot welded the the batteries positive with negative even in parallel? For instance the whole pack is one positive up and one negative up. I didn't understand. Could someone explain to me? ELI5 peharps. Thanks!
Hi, I have a 1500watt 72v motor and I would like to get the most out of it. What battery configuration should I be using. At the moment I am using led acid 6 * 12v 10ah. I feel like I can get a lot more speed out of the motor that’s why I am asking. My controller I am using it rated for 72v 1500w.
I'm starting to convert/ build an electric motorcycle - my goal is max speed 70-80km/h and 40-50km range, but I don't know from where to start, I hope I win electric motorcycle eBook.
How do I replace the 6x 12v lead acid batteries with this in my ebike? The connection type is different. Also, will I be able to use the same charger? (72v 20ah) Thanks
those holders are mad trash, you can see that the insulation of every 1.-2. cell is damaged, unwrapped or just shoved up
Enjoyed watching your making process,all the from Nigeria. And will be grad to learn more from you.
Question. New to doing packs. You do series first, then you do parallel. Why not do parallel, then connect the parallel blocks in series? Wouldn't that be less welding as you would only have 2 connection from block to block. To me, it looks like you built 140 cells in series, what am I missing :)
Shouldn't the BMS be outside of the battery pack? won't shrinkwrapping it in with the batteries over-heat it? I'm new to the channel and don't know how hot these will get. Looks cool though. I was considering buying a Zero FX this summer but now I'm reconsidering.
What gauge wire did you use to your XT90 connector? I'm trying to build a battery for an electric motorcycle with a 5kW motor. All the batteries I'm seeing online say 60A continuous which is what I need, but then they only have 12 gauge wire...
Bro i am india, I am planning to make an electric car using 72 v 5 kw BLDC motor, And i am watcing so many video for making battery pack, But this is one of best video i have watched till now..
Great work..I would like be in your contact..
A query - How can we reduce our battery size? One way is by using DC -DC booster but efficiency is 80-86% only. Any other possible way to get same 72V and 20AH battery ?
i just purchased this type of battery... $500. my ebike came with (6) 12v acid Motorcycle size batteries (Heavy). i didnt understand the concept of the auto shut off on the charger. so i left it plugged in even after charge was complete. well, one day it stayed charging and cooked my batteries and it left me with damaged batteries which didnt hold charge and i use it to commute to work (8 miles round trip) i tried to replace the batteries but they were hard to come across and it was difficult to understand all this volt, amp talk! so i purchased a 48v battery pack and learned that i needed a 72v. needless to say, I FIGURED IT OUT! i recommend this DIY battery packs! its not as heavy, and performs better than the acid batteries. i hope this encourages somebody to go with these types of battery packs!
Hai Micah... I was reading ur book DIY Lithium batteries... I have a doubt that if Balanced chargers do balanced charging of cell groups then function of BMS is only need to cut off the discharging of cell or there is any other drawback with balanced chargers that BMS could rectify it?
I have a question, I made a 72v batterie out of 6 12v batteries in series for a e bike, my problem is that by battery die really quickly. Is there anyway I can make those last longer with a different wiring? Or do I need those small 3,6v battery?
Thank you all!
So I assume your motorcycle will be drawing less than 90amps which will only net you between 8.8 kW at max 84v charge. I say that since he has a XT90 connector that’s only rated for 90A. People often forget about this fact.
Great video Micah. I learn more from you and your battery build videos than anyone else. You actually teach by explaining each part of the process. Great job! Thanks!
you can hawe a new cells from china bud they hawe wery diference betwen of capacity when you whil hawe wery good pack you mast oll cells carge and discharge and mesure you du this one time and ride longere::::::: i thing ok????
Mali ste na mysli: rozdielmi
9/5000
differences capacity
TY for another video . You say cell must be at the same V b4 assembly ; getting 00's cell at exactly the same V is ideal but unlikely so what is a range that is acceptable 25mv ? the cell i have purchased have 3.226v-3.236 ATM , it's going to be a couple weeks b4 i have the missing hardware and assemble the pack , i will mesure them again then , that will also tell me if the $ i spent was worth them , cheers & ride safe
Hi really Great,
But my idea is
1. you should of add cell level fusing system to battery long life ....yes Offcource yiu might use fuse at battery pack on total voltage and ah but cell level fuses will save the rest of the cells if there is any Hazard/blast/short circute etc...
2. You should of add any third party spar sensor parts to maintain normal temparature.
Yes these temparature sensors are not available but you kindly do research how to maintain to keep normal temperature between cells.
These two points will give batterypack long life running,
Safety, avoid any danger incidents.
It's just my opinion dude.
Hai bro, i'm ezy from indonesia, i have a quetion for you.. Whether the battery pack can be used as a variable like variable power supply, so if we need a power 24v we just click 24v button, if we need 36 v we just click 36v button according we need in one battery pack and how to make it? Thankyou 😊
LG MJ1 cells go for around 5 dollars. 240 cells is 1200 dollars. If you get 1000 charge cycles that's 1.20 dollars per charge. Those old Hondas get very high mileage and range isn't an issue because of gas stations. Is there a goal beyond making an electric motorcycle?
What about the thermal management of this battery pack? No cooling mechanism needed for a 2kWh 72V pack?
So that is 240 cells. Where are people buying individual cells that don't result in a battery pack costing thousands of dollars?
Hey man I love your videos I would like to get your DIY lithium battery book I think it would help me out a lot to learn everything that I want to know
My request to you to make a d i y battery build.. dimension mast be 1inch wide 1 inch height. And two feet long.. the battery must be 48 volt with quality BMS and battery..
My humble request to you to make a simple video this video looking very complicated...
I want to run 1000 watt motor with that battery so help me..
I have a bicycle and I just want to hide all the electronic equipment inside my bike to other people can't recognise is my E bike fron outside.
I really need to created this on my house and I don't want to take any risk.
I trust you sir please teach us
Nice video. Very informative. I'm building a escooter now and working on my pack. I am uber interested in our book on solar. I hope to cut my dependence to fossil fuels in 202.
Thank-you, your videos have encouraged me to build my first E-bike.
I haven't checked all of your questions here but, but do you build battery packs four people if they give you the configuration?
You must have missed catching it on film... Yeah yeah, sure... I think you just had trouble soldering it. Or it took too long for it to be considered good for the cells or even safe...
The thing is I wanted to see what soldering iron you used and in the end, I couldn't :3