I hope you guys enjoyed my How to Build a Lithium Battery tutorial series. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX
EbikeSchool.com what diameter/ flat width size heat shrink tubing do i need for 13s 5p battery. Is there a calculation. I cant do trail and error i am ordering heat shrink online there are 200mm 320mm 450mm etc.
Presumably measure the cross sectional circumference e.g. 2*width + 2*height. Divide that number by 2 and that's the minimum overall width of the pvc you need. Or just do cross sectional width + height
this is such a valuable class thanks ! Usually, i look at those DYI, and im like.. "im not gonna do any of that", but you really makes me want to do this, im evaluating all the tools i may need!
That's a nice thermally insulated pack ...fine for cold climates but might cook the batteries in summer ... could put a thermocouple in the heart of the pack , be interesting to log the temp.
oz93666 I was thinking about protection also i visualized his pack as a bomb really since all standards point to charging li-ion batteries under temperature observation
great tutorial Micah, i have followed the video and text and i have what indeed looks like a battery, but you do not show any testing of voltage along the way, i am not showing anything on the multi meter from the battery. and i am a little stuck as to which balance wires are which as there is no numbers on my BMS B1+, B2+ etc regards
Man those solder connections had me screeching every time :X I would heat everything up more for security against cold welds breaking on your connections. I'm sure the cells can withstand a small amount more heat than you're subjecting them to.
How do you determine heat shrink size? I'm trying to wrap a 4s battery pack with a radiating shell holder,but I don't want to order the wrong size. I found a formula (A+B=C)X(C X 1.5) and came up just under 158.75mm,but while searching I found that each option had 2 different sizes (Example: 188mm ( Circle with a vertical line through it 118mm) ). I don't want to assume that the line through it means equal to,and then end up with the wrong wrap.
For reference: circle with vertical line is "diameter". If the diameter is 118 mm, then the circumference is 370 mm. Half of that (when the tube is flattened on a roll) is 185 mm, close enough that it matches 188 for the most common measurement this stuff is sold by: width when flat. So that is what the 188 mm is.
Quick question for you, I am a hobbyist and I like to make electric long boards. I have a board that has three 4s 5,000 mah batteries. I have a BMS but I only want to use it for charging not for an output current. I have a speed controller for that. In the first picture you had he charging set up, now if i was to wire up all the sensor wires and wired the negative through the BMS then hooked up the positive to the positive on the battery hypothetically I could use the BMS as a balance charger. I also have as you put it an aluminum cased cooling fan charger that chargers it to the correct voltage.
HI Micah, Somewhat related. Any issues running a 48volt bafang mid drive with the battery like 17ah hours in a back pack? I want to keep the lines of my bike and also manage the weight of the bike. I see many emtb do with with like cyc motor. I'm putting it on a beach cruiser riding on rail trails. thanks.
I live in Arizona and just make sure my cells stay under the max continuous current draw. I also just heat shrink it and skip the foam and box. Never had a problem.
Set it up in a way so that there is space between the batteries and make it so that air flows between them while you ride. Look up how Tesla motors would do it to their battery backs, maybe you can apply it to a bike.
@Jean-Marc Chauveau .Jean-Marc Chauveau...The solution is not to fall for the biggest money & power grab scam the world has ever seen. Man-made Climate Change. Billionaire Globalists are laughing their asses off as you buy up their indulgences- er, Carbon Credits- as they fly around in their G7s. Looking down at you, laughing, as you desperately try to pay your penance to their Climate Church. Humanism is just another religion for men to cling to...
One question - when one disconnect and connect BMS - what is the sequence, so old or new BMS is not smoked accidentally? First battery plus and minus to "main* terminals and then add balancing connector (on connect) and first balancing connector removal and them remove battery plus and minus from BMS (on disconnect) or I am wrong? I see post is quite old, but I hope someone is reading still. Thanks!
I made 7 packs of 18650 (22 cells per pack) and want to hold them together so I can make a 24v battery out of them, can I wrap them in Kapton to hold them together?
I would go with a 20s configuration. 20 cells in series will give you 60v at the low end and 84v at the high, 74v nominal (assuming you're 72v setup is derived of a 6s car battery system this would do nicely, also if you're using cells that have a 3.6v nominal range than the voltage will be spot on at 72v nominal). Assuming you use new cells of 2800mah you would need 29 cells in parallel but I would go with 30 to make it even. So 30 times 21 equals 600 cells. That's a massive pack though.
Great vid! A question about the battery cases that you have linked in the description. Some of them come with a pre-made nickel belt that fits the structure of the battery case. Do you know if these belts are pure nickel and not nickel plated? Also do they need to be soldered down like you would with a nickel strip? Or would the encasement hold the belt in place? Thanks!
Hi I just would like to know if you can use a BMS just to balance the battery using just the C- for charge and discharge instead of using both ports. I'm building a 48v battery 13 long and 12 wide now I don't know how many amps that will be but the balancer I've ordered will be 20 amps. I've had my ebike hook up to as high as 36 amps, 3 sets of batteries in my trailer, I was thinking of making my 48v lithium 14 cell instead of 13 and 10 wide or if i can get enough batteries to make it 12 wide. The extra 4.3 volts would be a sweat spot i think this should not hurt the bike. The lithiums I'm using are from old laptop batteries. If i do stay with the 13 cell 48v and 12 wide I have no idea on how many amps it will put out. Oh ya and one more thing how many milliamps does it take to make 1 amp, I could never figure that out
yes, you are fine. heat will depends on your loads, add more batteries in parallel to lessen the load of cells thus less heat, and use larger gauge if you are concerned.
looks like your try to keep the heat in the pack this good for the horth country but not where it hot cloment if you happen to have a heater in that pack make shure you have a way to put out the fire
I will be ordering your books soon love your tutorials ...only one boo boo its the music ...is it absolutely necessarie a bit annoying when trying to concentrate on what your doing...( just saying) Thank you
when you pack the battery in such air tight case then what about the ventilation for the pack where the heat is going which generate during cells charging and discharging,,,,your concept is good but i am worried about ventilation of battery pack
i thought about mounting a wireless infrared camera and smoke detectors inside a ebike battery so you could monitor inside a sealed battery pack in zero light to save taking it apart
We would like to know what size he used because I am building a pack that is the same size, and plan to use heat shrink in the same orientation. Signed - ALL OF US
I hope you guys enjoyed my How to Build a Lithium Battery tutorial series. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX
you forgot to put the speed controller! Do you have any video teaching about the speed controller?
EbikeSchool.com what diameter/ flat width size heat shrink tubing do i need for 13s 5p battery. Is there a calculation. I cant do trail and error i am ordering heat shrink online there are 200mm 320mm 450mm etc.
Definitley buying the book awesome
Really wish you talked about the heat shrink sizing for help buying the stuff in the right size!
Presumably measure the cross sectional circumference e.g. 2*width + 2*height. Divide that number by 2 and that's the minimum overall width of the pvc you need.
Or just do cross sectional width + height
this is such a valuable class thanks ! Usually, i look at those DYI, and im like.. "im not gonna do any of that", but you really makes me want to do this, im evaluating all the tools i may need!
I just want to know how big was the blue shrink tube that you use was it 150 MM???
For a pack like that, what size is the PCV tubing you are using? Thanks! Great video!
That's a nice thermally insulated pack ...fine for cold climates but might cook the batteries in summer ... could put a thermocouple in the heart of the pack , be interesting to log the temp.
oz93666 I was thinking about protection also i visualized his pack as a bomb really since all standards point to charging li-ion batteries under temperature observation
What size is the Heat Shrink wrap you are using? Thank you!
Thanks for the series ..
Although this is almost a decade old video, I think it's more relevent today ..
how to choose the heat shrink tube width size?
great tutorial Micah, i have followed the video and text and i have what indeed looks like a battery, but you do not show any testing of voltage along the way, i am not showing anything on the multi meter from the battery. and i am a little stuck as to which balance wires are which as there is no numbers on my BMS B1+, B2+ etc
regards
what size is the heat shrink
Hi, thanks a lot for your video, what about foam temperature behaviour ?
I think same it will increase the temperature
Man those solder connections had me screeching every time :X I would heat everything up more for security against cold welds breaking on your connections. I'm sure the cells can withstand a small amount more heat than you're subjecting them to.
Great video. Do you have any recommendations for a hard case for the DIY batteries? Thanks!
How do you determine heat shrink size? I'm trying to wrap a 4s battery pack with a radiating shell holder,but I don't want to order the wrong size. I found a formula (A+B=C)X(C X 1.5) and came up just under 158.75mm,but while searching I found that each option had 2 different sizes (Example: 188mm ( Circle with a vertical line through it 118mm) ). I don't want to assume that the line through it means equal to,and then end up with the wrong wrap.
For reference: circle with vertical line is "diameter". If the diameter is 118 mm, then the circumference is 370 mm. Half of that (when the tube is flattened on a roll) is 185 mm, close enough that it matches 188 for the most common measurement this stuff is sold by: width when flat. So that is what the 188 mm is.
@@laurjoost9317 Ah, that makes a lot of sense. :) Thanks.
How do we measure the already built pack in order to know the correct size of pvc heat shrink we are going to use?
I think its assumed that you should get a couple sizes or at least one thats TOO big, eye ball it, then cut it to size. Its assumed, I would assume.
How many meter and mm heat shrink will u recommend i used to heat shrink my 13s 8p battery pack.
I wanna know the same question
me too..
me as well
Me too he obviously doesn’t care about his viewers
good stuff. love the information. the background music is not necessary, at all. almost distracting LOL
Quick question for you, I am a hobbyist and I like to make electric long boards. I have a board that has three 4s 5,000 mah batteries. I have a BMS but I only want to use it for charging not for an output current. I have a speed controller for that. In the first picture you had he charging set up, now if i was to wire up all the sensor wires and wired the negative through the BMS then hooked up the positive to the positive on the battery hypothetically I could use the BMS as a balance charger. I also have as you put it an aluminum cased cooling fan charger that chargers it to the correct voltage.
Sir please tell me how much width of this heat sink
Looks like its about 200mm, I just bought some and it looks about the same size.
Thank you very nice videos.
If I don't have or even have the box for the battery I create, what's the solution. What I have to do?
So how do you connect the smal display, the 1 where you can see how much power there is in the battery?
Between B+ and B-: mine works fine with that battery case , which originally contained a 24V battery (I have 7s)
Are there any fuses inside your battery pack?
Good day!
can i use any foam when wrapping the battery pack?
witch size should i use for a 1400mah 6s battery (40mm wide battery)? tnks
HI Micah, Somewhat related. Any issues running a 48volt bafang mid drive with the battery like 17ah hours in a back pack? I want to keep the lines of my bike and also manage the weight of the bike. I see many emtb do with with like cyc motor. I'm putting it on a beach cruiser riding on rail trails. thanks.
I have 4.8 to 4.0 volts how do i balance it or will the bms do that for me
Do you have a supplier for the PVC blue heat shrink for the large 72 volt battery
that would roast here in Arizona. what do you do for extremely hot climates?
Laura Downs cool it
I live in Arizona and just make sure my cells stay under the max continuous current draw. I also just heat shrink it and skip the foam and box. Never had a problem.
Set it up in a way so that there is space between the batteries and make it so that air flows between them while you ride. Look up how Tesla motors would do it to their battery backs, maybe you can apply it to a bike.
@Jean-Marc Chauveau .Jean-Marc Chauveau...The solution is not to fall for the biggest money & power grab scam the world has ever seen. Man-made Climate Change.
Billionaire Globalists are laughing their asses off as you buy up their indulgences- er, Carbon Credits- as they fly around in their G7s. Looking down at you, laughing, as you desperately try to pay your penance to their Climate Church. Humanism is just another religion for men to cling to...
What if I am gonna put it in a bag, what are the thickness of the wires that I should use?
heat shrink tubing diameter??
One question - when one disconnect and connect BMS - what is the sequence, so old or new BMS is not smoked accidentally? First battery plus and minus to "main* terminals and then add balancing connector (on connect) and first balancing connector removal and them remove battery plus and minus from BMS (on disconnect) or I am wrong? I see post is quite old, but I hope someone is reading still. Thanks!
I recently refurbished a large 72 volt bike battery I need to find out who the supplier for the PVC shrink tubing
I made 7 packs of 18650 (22 cells per pack) and want to hold them together so I can make a 24v battery out of them, can I wrap them in Kapton to hold them together?
Was thinking of just cutting an acrylic case for mine. That way it can still get some airflow. Any issues with this?
Can you please told how many batteries to build 72v 80A and the configuration
Thanks for your help and support
I would go with a 20s configuration. 20 cells in series will give you 60v at the low end and 84v at the high, 74v nominal (assuming you're 72v setup is derived of a 6s car battery system this would do nicely, also if you're using cells that have a 3.6v nominal range than the voltage will be spot on at 72v nominal). Assuming you use new cells of 2800mah you would need 29 cells in parallel but I would go with 30 to make it even. So 30 times 21 equals 600 cells. That's a massive pack though.
Great vid! A question about the battery cases that you have linked in the description. Some of them come with a pre-made nickel belt that fits the structure of the battery case. Do you know if these belts are pure nickel and not nickel plated? Also do they need to be soldered down like you would with a nickel strip? Or would the encasement hold the belt in place? Thanks!
sir what is the proper battery charger on 36v 12ah? thanks for the lesson i am from the phillipines and you help me to extend my knowledge
Depends on your battery chemistry , if it's 18650 like on the video, use 36v lithium ion charger
@@corsame14 ty
A 36v battery 12ah with 18650 lion cells must use a 42v charger not 36v
I would never laugh at your battery holder. Everything you do is cool, bro.
can i use the legg style battery building to make a power wall?
Sure, a bunch of people have.
Hi I just would like to know if you can use a BMS just to balance the battery using just the C- for charge and discharge instead of using both ports. I'm building a 48v battery 13 long and 12 wide now I don't know how many amps that will be but the balancer I've ordered will be 20 amps. I've had my ebike hook up to as high as 36 amps, 3 sets of batteries in my trailer, I was thinking of making my 48v lithium 14 cell instead of 13 and 10 wide or if i can get enough batteries to make it 12 wide. The extra 4.3 volts would be a sweat spot i think this should not hurt the bike. The lithiums I'm using are from old laptop batteries. If i do stay with the 13 cell 48v and 12 wide I have no idea on how many amps it will put out. Oh ya and one more thing how many milliamps does it take to make 1 amp, I could never figure that out
Oh by the way great vid on how to make a battery pack, For the first time builders this is where they should be
Hi, very thanks for your video, pls where can find this case and the shrink
Hi Cherif, the links are always in the description, but you can get cases here: goo.gl/W2DLmE and heat shrink here: goo.gl/6v1ow9
EbikeSchool.com lot of thanks, pls I need to understund how to use paint for your cells configuration
Sir how to put fuse in the battery out put wire? How to choose the amps of the fuse
What size would I use for 3s7p? IE 3x7
Do you not have wire strippers
You didn't use the vruzend pack!
liquid flux will make your soldering life so much easier and better...
But good work!
I wouldn't be able to build the end part. The hooking up the charger wires you weren't very clear on that very confusing
How do you have electro Hanan אילקטרו חנן fan?
Good video, nicely done!
Are these "unprotected" batteries to begin with. (Before the BMS)…?
What is the cost of building your own. My battery costs $299.00 to replace?
thanks, great video
Can we enclose big battery packs in wodden or plastic waterproof case .. will heating an issue
yes, you are fine. heat will depends on your loads, add more batteries in parallel to lessen the load of cells thus less heat, and use larger gauge if you are concerned.
Very risk job!
looks like your try to keep the heat in the pack this good for the horth country but not where it hot cloment
if you happen to have a heater in that pack make shure you have a way to put out the fire
Looks like a bomb to most people.
I will be ordering your books soon love your tutorials ...only one boo boo its the music ...is it absolutely necessarie a bit annoying when trying to concentrate on what your doing...( just saying) Thank you
Sr
BMS Lod 220-230/Dc 48Volt
Liking the series :)
Home Solar Research lol I see what you did there... Nice
Don't you need a heat sensor for the battery ???, even my electric screw driver has one on the battery .
when you pack the battery in such air tight case then what about the ventilation for the pack where the heat is going which generate during cells charging and discharging,,,,your concept is good but i am worried about ventilation of battery pack
#---48 March 22, 2023 Processing $110.97 for 6 items
today is 4/4/223 no answrer to inquiry about order status
has not answer email about order...
you soldring - to + you make mistake i have same board i know
2:48
אלקטרו חנן
Ha nice catch, what language/brand is that?
But so much confusion I have
i thought about mounting a wireless infrared camera and smoke detectors inside a ebike battery so you could monitor inside a sealed battery pack in zero light to save taking it apart
Dude, your soldering skills... Work on them please. What you're doing is unsafe
can you share what is unsafe about it.. time to learn!
Disliked for literally no info on how to determine shrinking tube size.
How can he tell you what size to get when you can build battery of a shit load of different sizes
We would like to know what size he used because I am building a pack that is the same size, and plan to use heat shrink in the same orientation.
Signed
- ALL OF US
@@kenleckie2359well he could have told us what size he used for the battery pack that he was building. Kind of dumb not to tell us!
Love the lazy French
You must be crazy to advise someone to buy at Alibaba, the most deceptive site in the world.Read reviews and you will see for yourself.
Nearly every single battery building component I own came from Aliexpress....
what makes them deceptive?
I've been buying from AliExpress for years, never had a problem, I can't say the same for eBay.
Here is s stupid question: why is your hairdryer an Israeli company?
What size heat shrink is that
Thanks for the video