Finally - 48v 21700 Cell modules

[@ronghengtai]

👍👍👍Your hands-on ability is very strong and your technology is great. I need to tell you and everyone that I am the designer of this 21700 battery holder. I tell you very seriously that the positive electrode must be installed first when installing the battery in this battery holder. Then press down the negative pole. When removing the battery, you must first remove it from the negative pole. If possible, it is best to put a colored cloth strip under the negative pole of the battery when installing the battery, so that you can disassemble the battery more easily. Good luck to everyone.👍👍👍👍👍👍👍👍👍👍

[@Beakerzor]

wow, I'm impressed, having followed you for years, at how easy you've made everything for the DIY home hobbyist - thank you for your years of work

[@nloggraficas]

After the math its way too expensive $970 plus shipping of all those parts plus taxes plus any miscellaneous expenses for just 1 battery of 25 ah, if you want 2 set would reach $1300; with $200 more id rather buy a EG4 $1500 100ah 5.12kw/h fully assambled and guaranteed

[@normellow]

Thanks for the price breakdown.

[@niktak1114]

These cylindrical cell packs don't really make sense anymore unless you need a tiny pack or you have a bunch of free cells

[@user-jk9zr3sc5h]

What's the price per kw

[@Shmade0304]

This is DIY it’s always been that here on this channel he never claimed to say it was cheaper..it’s all about the battery building experience…if you don’t like it then like you said just get a eg4 but your not gonna have the feeling of building your own stuff that’s how I feel expensive or not that …DIY gang

[@nloggraficas]

@@Shmade0304 its not about the like it or not; it’s about that the DIY for this video makes no sense, I already did a 2kw/h battery using a123 batteries and I only expend $400 dollars instead of $900 or more and it’s working perfectly; the reason for DIY its to do save money in a reasonable way not reaching the 65% of the cost of the same product; but if you will do a DIY that will cost you almost the same or more as the product in the maket and will be less capacity then its not worth the efforts constructing something like that; better to buy new products and that’s it; the feelings of DIY it’s to say i did it with less money and work great not to say i did but i expend more and the capacity is not the same and many other issues… by the way id follow this channel for years and I found he it’s a great genius making DIY easier and safely and people learn a lot with his work… so?

[@ripy3422]

I need a battery not a mortgage

[@seymourpro6097]

Consider taking the power connectors to diagonal corners of the battery to ensure that all the assemblies charge and discharge evenly. Using the top corners means that the top assembly charges and discharges more than the others simply for the minute difference in the resistance of the posts. Could you make an assembly matching cable with say 10 ohms between each connector so that power sharing on initial contact is moderated? -Not everyone gets a box of perfectly matched cells. First assembly gets the resistor link, final assembly gets a zero ohm wire.

[@MattWells0]

When adding the heatshrink to the battery, I use a small round magnet that is about 1mm on a metal serface and place the negative end of the battery on the magnet. This stops it from rolling around when blowing it with hot air and gives a consistent wrap around the bottom of the heatshring.

[@shadowmoon7763]

Love your video's... You should consider the same concept but using 18650's, Would love to see a build PCB for 48v for those.

[@Randomologi]

You could put 18650’s in the same assembly and it would work. They are still 14S to get 48V.

[@MmeHyraelle]

@@Randomologi you're right! Only 5mm shorter, that's less than a quarter inch. They should hold inside the holders and the chemistry is the same so the bms will work.

[@charlestatakis9363]

Wow, amazing update. Jehu, I continue to be impressed with your direct plausible approach we can all follow. I'm always totally comfortable with what you bring to battery configurations and charging. Watching you with total confidence is a stressfree approach for many of us.

[@EngineeredMojo]

You inspire me to start exploring battery power

[@68pishta68]

careful putting these naked batteries in holder type chargers. They (18650) can arc easily when you slide the positive end into the contact as it usually hits the negative edge first then the positive button, POW! I now insert the positive end first and an angle them let the negative end slide in.

[@chris_mk5supra]

these modual are so good ...

[@fouroakfarm]

12V 100Ah LiFe batteries are as low as $350 now. And cheaper if you buy cells and DIY. These would be good for a mobile application where weight matters but they don't seem cost competitive for stationary storage

[@LimbaZero]

for design point of view I think I would have used angled fuse holders that you don't need to disassembly pack when changing fuse

[@mr-biz]

If you have blown a fuse on a pack, do you want to replace it without determining the problem first? Being forced to disassemble the pack would seem to be a feature, not a hindrance.

[@LimbaZero]

​@@mr-biz Basically you can do sanity checks from fuse holder. If it show more voltage than 0v then test with resistor you can try charge board to same level. If it has short cell then you also have burn "fuses" in balance connector. It seems those fuses is mainly for user error when building that pack so you notice when it burns when you assembly it.

[@waynegabler6570]

The e-bike thingy. People converting from sla batteries have cases from either 12v 10-14ah or 12v 18-22 that should be filled with cells and then put back into the bike. 3.2v x 4s =12.8v which is perfect. Rather than use new cells there are lots of used 3.7v cells that are 20% below capacity but available 'dirt cheap'. Powering bikes also gives those cells a 2nd life. Those little packs that are 48V should power any 48V bike, a box that 4 batteries came out of (7x3x7) could hold even more cells. Most riders only go 16mi or less so having 1 hour ride time would work and their batteries can be charged a few 1,000 times. That being said, there are times when 4hrs would be better than having to charge. Based on that info and the same 500watt motor being used what is the lowers mah I can have for the various bikes 48v, 60v, 72v, 84v (Daymak makes bluetooth controllers for all those so the specs would help as far as controller voltages). The motor can take more voltage of cooling is increased. Now that I have 48v - 84v using 12v 'cells' is there a bms that would to keep the charge level to the same even though the batteries are slightly different. More than once I have 1 sla battery go flat, that is a lot of work to repair and replacing the whole set is 'needlessly expensive'.

[@Xero1of1]

12:37 Another think you can do is spread some polyurethane over the contacts. It acts as an insulator, but it can be worn through, so you have to be careful, but it does make the boards safer, which is what you'll need given the power you've got packed in there. It'll also help the longevity of the boards by helping prevent corrosion and wear from weather.

[@ejonesss]

i think at 36 volts is where they consider the battery to be high voltage. in electric cars all high voltage wiring is orange so if the car is in an accident the first responders especially the ones running the jaws of life because at like 400 volts there can be lots of sparks and vaporize metal and even fire.

[@edgaro.4564]

Under 50v is low voltage, after 50v is medium voltage until 1000, after 1000 is high voltage. The orange cables in the car are carrying 600v.

[@GannDolph]

Nice haul Jehu - great you guys can make these kind of cells available! However, the 21700s still seem to command an enormous premium over 18650's -- in terms of $$$ per kilowatts hour. I guess they make sense for someone who needs the absolute maximum power density/ minimal volume and weight..

[@yasirrakhurrafat1142]

Maybe if you find a better supplier , you'll get better deals . But I really love the safety and high amp output potential of lifepo4 s (32600) .

[@bobforte9343]

Uhhh…I paid $5.50 each for P42A’s a couple months ago. What 18650 can touch that capacity and CDR (ie 3200mah+ and 25A+) under $7?

[@yasirrakhurrafat1142]

@@bobforte9343 hey yo ! What's CDR ?

[@GannDolph]

@@bobforte9343 these are energy cells - 9.8A max continuous for the M50L's. there are opportunities all the time to get equivalent style 18650 energy cells by major brands, unused condition , 5 to 7amp continuous energy cells in surplus packs, for a dollar a piece. 2900 to 3200 mah. battery hookup has panasonic Ncr18650a's in unused new medical packs for under a dollar a cell right now. for the high capacity power cells , yes those cost more : i bought a couple of 200ct factory new boxes of sony vtc6 18650 from ev west for 3.25 a cell. but these m50l 21700 are not power cells.

[@GannDolph]

@@yasirrakhurrafat1142 Jag35 deals are great , it's just that there's still a huge market premium for 21700 cells generally. I think it's irrational since most of them aren't high discharge rate cells. So for most applications you need to make a big sized pack with several cells in parallel. The end result isn't much different than building an 18650 based pack. At five times the price. It's crazy..

[@hamprepph]

I've had a great idea just popped up in my mind and I found your channel. Think of having many Dewalt batteries, building a power bank without extracting the cells inside, and still using it with your portable drills! Hope you'll find this comment!

[@mrfrenzy.]

That's a great idea, but Dewalt already figured it out, you can buy their "1800 Watt Portable Power Station" :)

[@ericklein5097]

Tindie is full of people that make adapters that go on top of the batteries and output DC in all kinds of ways.

[@gemrough]

Yea price is way too high! I still have several boxes of Model 3 20700’s I bought… they build awesome packs!

[@eprofessio]

I always liked this guy.

[@Beakerzor]

21:15 WOW, look at how even the temperature is among them all

[@buzzofftoxicblog791]

👏brilliant I see this is education knowledge is power 🔋

[@James-hb8qu]

The engineer in me, of course, starts thinking of what can go wrong. Those are fairly inexpensive battery holders so if corrosion develops on the contacts and causes a voltage drop across them will the design fail safe or cause a problem? I don't know enough about the battery controller to know if this would be a issue and how the controller would respond to it.

[@Velislide]

What is that, like 1000$ for a 85AH 12v battery with no warranty, in the end?

[@Kettenhund75]

That's what I was thinking.

[@bobforte9343]

Been waiting for this!

[@SuperMapupa]

the best layout would be to have high current traces on the bottom of the board as the pin from the battery holder will be solder to the current carrying side of the copper vs current flowing through the plating in the pin hole...

[@kendallosenbaugh8858]

WE NEED SOME 48,52,60,72 VOLT EBIKE BATTERIES! k.o.

[@dreamkiss4u]

did you ad the link to the 48v bms you talked about that is budget friendly for it?

[@FabriDragon]

You should put red and black heat shrink tube on those bus bar standoffs

[@leandromachado2854]

We need 72v modules. It will be fantastic 👌

[@MmeHyraelle]

Most areas in the world requires people certifications, like being an electrician, for mid voltage ranges. Low voltage free for everyone systems stops at 48V as 60V systems can shock ya.

[@leandromachado2854]

@@MmeHyraelle I understand.

[@__WJK__]

Looks great but didn't you do this w/18650s and discover the +/- spring terminals couldn't handle the current and got too hot(?)

[@Mooheda]

I'm wondering about the pcb software? Also having issues finding safe 18560s/ 21700 way to many fakes floating around the Web.

[@thanapatrachartburut513]

you should make a pack of 72v 20ah for e motocycle and see how it perform.

[@waynegabler6570]

One more question. I can get solder to stick to the nickle a lot better than I can to the cell. If I tin the nickle in the right places and then spot weld it in place, would I get any benefits in terms of strength (via melted solder plus nickle to nickle) as a bike would be 'high vibration area'. (in my 'case' I have 16 cells (26650) in a old sla case x 5 cases)

[@alsemi-back-up579]

How about 7s for 24 Volt Packs? Do You Sell The Boards for 7s Packs?

[@chucktrotter9699]

7.1.22 Great video. Thanks for making it.

[@PCBWay]

You Rock 👍👍👍👍

[@GregOnSummit]

You need to do the same for us with 18650s, double sided ... 48v FTW

[@Builtbypete]

How can we get this kits for the UK. I've been to your site to purchase but says international from the US is not available. Anyway around this?

[@bobforte9343]

I almost bought a BG8S but saw how much more powerful the ToolkitRC M8S is and decided to risk choosing not so great reputation ToolkitRC over ISDT. Any experience with the M8S? iCharger X6 and the bigger brothers were on my radar but they are pricey. Still might get a BG8S for powerwall building alone.

[@Screamingtut]

I want only 12v pcb board and using 4 batteries in each. I just ordered 24 - 21700 4000mAh LG cells I need the BMS that will handle and I will be making 2 battery packs using 12 cells each (3S3P)

[@seavil1]

Can you use them for battery bank replacements, or for my Coyote Cannon Light? I normally use NL2160HP. I know I'm a bit of a dope but this is how I learn

[@ericklein5097]

What's the ampacity rating of those brass standoffs? Is there anything out there with less resistance we could use? I'm sure pure copper is probably a bit too soft.

[@ericklein5097]

Batemo only got 9.3A CDR off those cells so I'd be careful saying they are capable of doing a lot more than 5A. I typically find a cells max CDR should be reduced by 50% to get the best balance of capacity, cycle life, voltage sag, and cell temp at discharge cutoff.

[@jehugarcia]

Gold standoffs would be the best

[@coldrider3517]

Thanks for all your help , QUESTION; When you say cell and packs (parallel ) of cells must be at the same voltage , to what decimal point do they have to be the same 0.1-0.01-0.001v . Or in another way how close to one another is ok or is too far apart ? assembling parallel packs 1st , cell with small differences will self balance what is the time to wait for that to be completed ?

[@mr-biz]

A couple of math problems. 1. 10:13 The pack is 14S5P (=70 cells). You have finished soldering the first pack. You said, "It's fully put together. Now we must do this five more times." It should be four more times. On the PCBWay page, you specify 5x4 cell holders and 5x3cell holds = 35 cells, but the project is for 70 cells. Despite my OCD nitpicking, this is a great video. What happened to the BMS?

[@RyCorp77]

also wouldn't a 48v pack nominal be a 13s? 3.7 x 13 = 48.1 (max/charge ~54v)

[@kimholam3530]

May I ask which BMS should be used to use it and ask for recommendation. Will you consider the matching BMS PCB tutorial? Thank you very much. 🙏

[@Dichiara1rg]

Why don’t you offer a package deal? With everything (soup to nuts) you need to build this battery. I’m lazy and actually don’t have time to or inclination to order everything separately. Throw it all in a box and ship it to the customer.

[@sff5758]

Nice setup. I just ordered a few. Did you ever finish the BMS? I would love to get some to match!

[@sff5758]

nm found it! thanks. kzbin.info/www/bejne/oHubYaNmotOJqJY

[@m.s.5914]

Thx for the video! Is there a chance you could make a video about how to choose the right bms and controller? I m about to build my first battery pack, 13S 6P, and find it very hard to decide what to buy.

[@hobiethompson8986]

any reply to this? I also need info on the BMS for this great thing

[@lamnot85]

can i use with ecoflow delta mini

[@Bruno-jp1wq]

Great video Jehu ! do you have any way to know if these 2170 cells are NCM or NCMA chemistry ??

[@jamesdavenport4583]

What will I need if I wanted to build a 30amp solar generator for my RV?

[@spokehedz]

I wish there was a way to make something along these lines for a triangle battery pack.

[@吕航-i9c]

What it use for?

[@ajingolk7716]

Its nice to build something your self for quality but fancy builds is expensive, a factory buy is to reduce costs

[@nolan412]

In parallel!? Serial 120+ V would be more fun.

[@roxy_xcxc6869]

😃 can you measure LG 21700 internal resistance video have ! 13 mili Omp is it new battery or 18 mili Omp is it new or old battery !

[@kimholam3530]

What should be the length of the M5 stud?

[@mahirfredericks4013]

Do the brass stand offs add any resistance?

[@kurtisengle6256]

Suppose I had a 1980 Trumph TR7 convertable with original paint and 40 year old rubber in the engine bay... Full discloosure : I have a 1980 TR7 in my garage with clogged carbs (ethanol) and leaky everything. Only a trace of rust, though. Don't know if I should rebuild (everything) or electrify. Thoughts?

[@martinair329]

Start by finding somebody who will insure it if you electrify it.

[@justanpayne8748]

I have 30 21700 cells I bought. I want to make 12 volt ish battery packs. Is there a simple one way to do it?. I'm also looking for a charge board.

[@jehugarcia]

Set them up in 3s10p, There’s no kit to do this because 3s = 11.1v = weird voltage that’s not usable with most 12v devices. You’ll likely have to build your battery pack from scratch

[@roxy_xcxc6869]

🤔 Can u open up the wrapper LG Cell m50T 21700🤔 is it real or Fake!

[@edgaro.4564]

So, I can use any 60v / 30a power supply to charge them since the BMS will regulate the batteries??, I want to build a UPS, so it will be all the time the PS and the inverter plug-in to the batteries. Is that correct or what you suggest is? Thanks

[@davidrogers5343]

what if you can not see well old age?

[@captainobvious9188]

What software is this that he is designing the PCB with?

[@Beakerzor]

W A N T

[@zonebernz8185]

i need ah 78volt module how much?

[@iangriffin8591]

How or where do we get the PCB boards?

[@jehugarcia]

Link

[@iangriffin8591]

@@jehugarcia I spoke to PCB and they can’t find the boards in the video or their web site?

[@itsaj007]

Yessir

[@meco3215]

can these be used to create ebike battery?

[@jasongooden917]

You should make a 24 volt module. Most mobility devices like power wheelchairs and mobility scooters use 24 volt. Imagine not having to use lead acid.

[@MmeHyraelle]

That's what i'm building for solar power. 7S, 25v nominal packs. :)

[@jasongooden917]

@@MmeHyraelle i need to learn how to do that

[@evapena100]

Dear Jaguars, I intend to buy a 2013 Nissan Leaf, can I increase the range and electric capacity of this car easily myself?

[@magnumoppai159]

How much does this weigh?

[@MrPir84free]

48V nominal or 52V nominal ?

[@AboveandBeyond44]

😎👍

[@VietnamReviews]

It would be nice if this board had an extra hole to mount the 18650 battery tray.

[@jehugarcia]

One board for both applications…. Yeah that can be done

[@VietnamReviews]

@@jehugarcia Everyone is waiting for a new version. Thank you for the great videos

[@troyyarbrough]

Forgive my lack of knowledge on this type of build. You state 48 Volts, but what are the Amp Hours or Watt Hours?

[@edgaro.4564]

Wh is the capacity, how many hours will last for that many watts. Ah is the same just look at it with Amps

[@troyyarbrough]

@@edgaro.4564 Okay. My question was the AMOUNT of wh and ah. He never mentions either one. I know what watt hours (wh) and amp hours (ah) are.

[@onehorwincr6br]

Boas amigo, uma pergunta gostaria de saber se consigo montar um Pack de 72V 50ah deste seu projeto. Obrigado

[@jafolost]

No link to buy them ?

[@jehugarcia]

yeah I guess you right, asking people to click on the project link is too much .. I added it

[@jafolost]

@@jehugarcia when you first had the link up its went to the sponsors website. Remember some of us are not as skilled at finding links. Thanks for adding it.

[@jasonsmith4505]

@@jehugarcia that jeg wag

[@mm-hl7gh]

Asking you to talk less and say more would be too much to ask for too, right ?

[@ambersmith6517]

I WENT TO YOUR STORE TO PRICE YOUR NEW BATT IN VIDEO AND DID NOT SEE THEM i already have batterys but keep eye out for freinds at your store i may need some for ebike soon

[@ambersmith6517]

i also want to say i like how you make things so any skill or no skilled people can make diy batterys this is a very fun hobby that anyone at any skill level can very quickly learn thanks to the way you do things i know it likley helps your bizz some maybe a little but i have knowen many of people like yourself they was the hardest working best cooking close family life and good freinds i hope you truly know God our father put ALL your trust in him and i hope he God the father greatly blesses you and ALL your family!!

[@tapiten]

Maybe coat batteries with heat wrap

[@companionisolutions889]

Amigo donde puedo comprar las 21700 ?

[@jehugarcia]

jag35.com/products/4000mah-12a-3-65v-21700-cells-lishen-lr2170sa?ToPasteboard

[@javierrosario1439]

donde puedo comprar ese modulo 48v

[@jehugarcia]

En pcbway

[@dreamproduction9774]

Hello sir, I need a help from you, I have ev bike battery 60v 20ah , with 6am charger.. I want to made a power station to charge my ev bike 60v 20ah battery, two/ three time.. What type of battery and what type of inverter I need?? Please help, and explane me brief Thank you

[@garnettbingham5234]

Hey, what cycle life can we expect from these batteries?

[@shadowtheimpure]

These cells are used for EVs, so I would say you can expect pretty good cycle life.

[@MmeHyraelle]

7-10 years. I'm more worried about time/entropy degradation, unless you're making a high output pack like for an electric bike, cycle count won't really matters as they'll slowly degrade and as long you know the capacity charged everytime, you'll notice it before anything goes wrong ;)

[@P51]

did you get a xylophone?

[@jbagadiong95]

That's 14s it should be 52v nominal.

[@ezeJeff]

Samba 21700 battery pack

[@patricksmith5640]

Dude stop gouging the crap out us on shipping charges! I put 6 of these in my cart on your website went to cart to check out, an you only allow fedex for shipping an charge of $28 to ship 6 batteries to ohio So I go to Orbtonics an get free shipping

[@johnwicks6187]

😊Can sell to me 100pcs LG M50L can..! & how much..!

[@jehugarcia]

I’ll let you have them for $4/cell if you buy a whole box jag35.com/products/unused-lg-inr2170-li-ion-21700-cells-3-6v-5000mah

[@GM-qh2ki]

What happened? You used to be the leader in batteries on KZbin. Now you’re pushing these unsafe chemistries when lithium iron phosphate is the way to go now! You need to re-up your game!

[@jehugarcia]

I sell Lifepo4 also, these are not dangerous chemistries

[@alsemi-back-up579]

Your Links for Canada are NO F GOOD!!!!

[@majed.Alshahrani]

In the past you were enjoying this thing, but now you are doing a lot of advertising, which is so annoying

[@sempertard]

Another KZbinr with a great idea and product, but answers zero questions. Why? Are you really that busy?

[@jehugarcia]

Yes, what’s your question?

[@mm-hl7gh]

Can’t watch this.. he talks WAY too much, while saying way too little, skipping important parts and keeping the best infos secret.

[@dreamproduction9774]

Hello sir, I need a help from you, I have ev bike battery 60v 20ah , with 5am charger.. I want to made a power station to charge my ev bike 60v 20ah battery, two/ three time.. What type of battery and what type of inverter I need?? Please help, and explane me brief Thank you