The 5th digit is its shape. So the 0 means a cylindrical cell.

@tomstdenis

4 жыл бұрын

yup prismatic or pouch cells use 3 groups of 2 digits

@LithiumSolar

4 жыл бұрын

Great to know, thank you!

@Chris-lp2dk

2 жыл бұрын

Hey- Actually 5th digit (0) is a zero. 700 mm = length of the cell. 21700 = 21mm x 700mm

@NeariX846

2 жыл бұрын

@@Chris-lp2dk 700mm is wrong. That’s 70cm so nearly a full meter

Very cool. Thanks for the demo!

Soldering Iron looks great. As always an enjoyable video.

As an rc car hobbyist I will tell you this battery is a thing if beauty. 4s battery with 30000 mah. That would run my cars all day

Superb way of explaining. Thank you so much from India.

Maybe for safety reasons you should mention that if someone wanted to use additional flux for the soldering, they must under no circumstances use flux that contains organic acids of any kind. I've come across so many people who think flux = flux, what's the difference? And then they end up with some acid corroding through their electronics, or even worse, through their batteries. Make sure that all flux is rated for electronics use, the strongest you should use is ROM1 type flux, but even that should be brushed off with IPA after soldering (it might re-activate in humid and warm conditions and start corroding stuff, although not nearly as badly as acid flux). The safest flux to use in these types of projects would be a mild REM0 no-clean flux intended for smd electronics.

very nice details. Thank you.

Thankyou a lot brother.... I tried a lot of videos but u defined it well... 💕

Great video. I really enjoy your work and the way you present and explain everything. How much does that battery weigh? Thanks and keep up the great work.

Thanks for another great video

thank you for this video it is well explained and I really learned a lot

Awesome video as always 🙂👍

These packs would make a great power wheels car battery replacement!.

Your videos have good knowledge keep it up 👍👍

Just wondering about the battery options. You have shown using 18650 grid holders with nickel strips with shrink wrap, jahu garcia uses pcb to hold batteries, and will prowse uses the larger lithium cells. All are good and work. Pros and cons?

I like the disclaimer. More folks should do that. To many people setting things on fire and blaming everyone but themselves. Also interesting cells, I will have to look for some.

073020/1153 pst. Thanks again for this educational/ instructional video. Stay safe and 73s..

Could you use these cells to build some 14s14p packs to charge a Bluetti AC200 or something similar? Maybe build 2 or 3 of them, and connect them in parallel then to the unit?

Please share your view on spot welding with nickel strip vs soldering with fuses to a bus bar. Thanks.

Thank you, sir.

Could you do a tear down and possible replacement cells video on a Bosch 625 wh ebike battery. Not a single video on it and loads of people with worn out cells, would be good to see if you think you could replace cells, maybe even increase capacity with good quality cells

Thanks for the video. This is super helpful. I am building a battery pack for an efoil board. 52V, 70AH with a peak draw of 200A. It will be a 14S and 14P using 21700 cells. I was wondering if you have come across a nickel plate with fuse for individual cells.

pretty sure the extra 0 means its cylindrical

@LithiumSolar

4 жыл бұрын

Ah good to know, thanks!

0:50... It s called diameter on a round cell....

@LithiumSolar

4 жыл бұрын

Thank you for your feedback...

Those cells are good :)

could u also teach how do u change the weld pen for the sunkko? it looks really neat

@dieselphiend

3 жыл бұрын

He just took the unit apart, and attached them to the contacts.

These make great Xmas gifts. How can I get on the list?

@LithiumSolar the zero at the end of batteries like 18650 or 21700 indicates the shape of the batteries, 0 means cylindrical. 1:00

After watching a number of videos on making battery packs the issue of fusing individual cells has come up. It looks like a major PITA to fuse each cell. What do you thing about doing this?

Could you tell me how to conduct discharge / charge of Lithium ion battery experiment and log every 1 second. And using the experiment I can calculate SOC and SOH of the Battery. Please give me any clue how I can log (the devices that I can use). Thanks

Nice and helpful video. Where did you source the extra balance leads?

@LithiumSolar

3 жыл бұрын

Thanks! The extra balance leads were these amzn.to/3jcYAzC You really made me hunt for the order, I purchased them all the way back in 2016 LOL

Make a custom Charge/Discharge Profile and you can set it up to whatever voltages you want!

@LithiumSolar

4 жыл бұрын

Thanks! I really need to spend some time figuring it out lol

Thanks, I enjoy your thorough explanation and videography! Would you please provide a source link for the large blue heat shrink packaging material. Thanks again.

@LithiumSolar

4 жыл бұрын

Thanks! I purchased the large blue heat shrink from ebay.to/2WIjKNF

@pjhalchemy

4 жыл бұрын

@@LithiumSolar Thanks Much!

Bro your really fucking things up right now.... That wood clearly says this side down.... Good job dudeski.

@LithiumSolar

3 жыл бұрын

LOL. I put that side up as it was the smoother of the two sides. I really need to get something to put over it as a better surface to work on, just not sure what to use.

Nothing like building your own tools for a project.

I’m confused with the bms wiring...when searching that 4S bms diagram shows using P+ P- and B+ B-. Yours only uses B- and P-. Will that be the case for any bms?

@LithiumSolar

4 жыл бұрын

In the case of this particular BMS, the P+, B+n and red positive wire are all connected together on the board. The negative is the only pole being switched. The BMS was designed to fit on the side of an 18650 battery pack, where you would bend over the nickel strips to sit on those pads. That's why the pads are in each corner they way they are. Since we are connecting with the balance wire connecter instead, there's no reason to connect the P+ or B+. You could if you wanted, but don't have to.

Do a discharge test to see if it is 5000maH per cell

Please test the 21700 model 3 cell individually.it would be really helpful

Hi..! Hope you have a great day. Please guide me if I want to build same like this a 4s 6p 21700 battery pack will be it is suitable for laptop power bank..? I have HP ProBook 430 g2 laptop which requires 14.8v and approximate 2A Please reply I'm waiting for your kind guidance. Regards: M.Zubair

I've got a Model 3 battery module I'm disassembling and building a couple 100 Ah, 24 V packs, some 48V 14s2p ebike packs and a few little 12V packs to power misc. projects. Thank for the informative video. Any way I could get the honeycomb 21700 cell holders?

@LithiumSolar

4 жыл бұрын

Cool, wish I could get my hands on a complete module. That would be a fun tear-down! The holders should be available soon. I just checked with Keith, the person who owns that eBay store, and he said maybe end of the week. The batch he got in was defective, (oversized by 1mm) which is why they look a bit loose in my video, and is waiting for the replacement shipment.

@LithiumSolar

4 жыл бұрын

The holders are listed now ebay.to/31f4mc5

@stanmacdonald1073

4 жыл бұрын

I got my Model 3 module on ebay from a company in Rancho Cordova near Sacramento, CA for a very reasonable price. The module was from a car with less than 30k miles and the cells are measuring close to 5 Ah. The teardown is a PITA. The glue is strong and there is a fair a amount of fiberglass reinforcement. If you had use for a 23s pack it would be great as is. I ordered the cell spacers. They look like the ticket! Thank you for the info.

I cant recall, but didnt you create a pack with individually fused cells with lead wires? I'd like to review that again.

4s6p battery is nice can the two of the 4s6p battery be connerted in parallel

18 65 0 means 18 x 65 mm and the last 0 stands for round shape. Same for 21 70 0.

@LithiumSolar

4 жыл бұрын

Thanks! This is why I love doing these kinds of videos. I always end up learning something new.

Any idea on when the 21700 honeycomb cell holders will be available again?

@LithiumSolar

3 жыл бұрын

I asked and was told they're sold out, but more are on the way and to check back in about 2 weeks. They sure sold out fast... lol

@AdventureMachines

3 жыл бұрын

@@LithiumSolar I just DM'd him on FB, will let y'all know if I get any more details on the ETA.

A bit confused... are these straight Lithium or Lithium/iron/phosphate (LiFePo4)? What was your final cost for all materials? I am an Amateur Radio operator, & I am looking to build/buy a 30AH lifepo4 for my portable Ham equipment in the near future. My equipment nominal voltage is 13.8 vdc +/- 15% @ max 25 Amps.

@LithiumSolar

4 жыл бұрын

They are 3.7V lithium. If you're looking for a 12V replacement, LiFePO4 would better suited for your needs. The voltages of 3.7V cells doesn't work out well for 12V applications as it ends up being too high or too low.

@jptucsonaz8503

4 жыл бұрын

@@LithiumSolar thanks...

nice and simple battery. i guess the nickel strip is acting also as a fuse between each cell?

@LithiumSolar

4 жыл бұрын

No. There are no fuses between the cells. There are only 6 in each parallel grouping - no reason for fuses.

probably a stupid question, but is there anything that would prohibit using a charger meant for 18650 packs to charge a 21700 pack?

@LithiumSolar

3 жыл бұрын

There are no stupid questions, better to be safe than sorry!! And no, the 18650 vs 21700 is just a formfactor of the battery. The 18650 means 18mm wide and 65mm in length. It doesn't have any relation to the chemistry or voltage parameters of the cell. As long as the cell is of the same chemistry and same voltages, there are no problems at all. You just can't take a charger intended for 18650 lithium cobalt and use it on 26650 lithium iron phosphate cells - because at that point, the chemistry and voltages are different.

Really wanna get those cell holders. No link for them yet?

@LithiumSolar

4 жыл бұрын

I'll add it when they're available. I explained in more detail on Facebook :)

@BigBattery

4 жыл бұрын

BigBattery is including FREE cell holders with each purchase!

Why do you use nickel ? and can copper be used as well ? im not very experienced sorry for the dumb question :P

@LithiumSolar

4 жыл бұрын

Nickel is the standard with spot-welded batteries. You can certainly use copper, which has better conductivity, but you won't be able to spot-weld it without some very expensive equipment :)

@turner7777

4 жыл бұрын

@@LithiumSolar Ah ok, thank you so much!

Too bad, it doesn't ship here. I kinda wish that there was someone in Europe to supply these. Or any kind of recycled cells. I was surprised, because I thought that these were from batteryhookup.

What if I want to make a 36volt battery at 10 or 20 amp hours what kind of bms do I need for it and what kind of charger do I need I have a swagtron electric bike it only has a 36 volt 4 amp hour battery the charger is 42 volts at 1.5 amps do I need a 42 volt charger with higher amps how much will the battery’s cost to make that I am getting a new electric bike that I can go 230 miles on a charge that cost about $6,000 but they say it’s going to take awhile to get it

Why did you use the LiFePO4 setting on the charger?

@LithiumSolar

4 жыл бұрын

I used the LiPo setting (lithium polymer) because it is pre-configured to stop charging at 4.20V where as the Li-Ion is pre-configured to stop at 4.10V. You can edit these, I just haven't bothered as it's easier just to click the LiPo option.

@maximilianmustermann5763

4 жыл бұрын

@@LithiumSolar I'm glad I am not the only one doing this! ;)

2:15 that's also supposed to be the E from the Tesla logo

Could you visit Corridor Cast some time ?

Where can I get some of these to buy

0 at the end means it is cylindrical form factor

Has anyone seen hexagonal holders for 32xxx cells?

I noticed what you refer to as a "cell" is actually 6 NCR21700 connected in parallel. I found this terminology a bit odd. But hey if it works for you then it's all good.

@LithiumSolar

4 жыл бұрын

Yes. If you want to be technical, when you connect two cells it becomes a "battery"

Where do you get the BMS boards?

@LithiumSolar

4 жыл бұрын

This is the BMS amzn.to/3jY3gdB I'll add it to the description

@hextreme42

4 жыл бұрын

@@LithiumSolar Thanks!

The last digit is the shape 0 for a round cell..

careful where you are putting the knife around the plus end of the cell if you was to short the cell bad things can happen. a suggestion: in future videos you may want to use some non conductive when ever pointing at the top of a cell.

You can stick your hand across those conductors. You can do so all the way up to about 70v- that's where you'll begin to get shocked. Not even my 50.4v battery can shock me.

@LithiumSolar

3 жыл бұрын

It depends on a lot of factors. I can feel 24V from a 7s battery...

@dieselphiend

3 жыл бұрын

@@LithiumSolar Sweaty hands? I don't know. I know some people have a higher salt content on the surface of their skin, so who knows. I just built a 12s10p 18650 pack, and I might have felt a tickle or two. There's no need to treat it any different than a 12v battery. You can handle it, you can put both hands on those conductors all day long.

which spot welder did you use?

@LithiumSolar

3 жыл бұрын

Sunkko 709AD, 240V Model

🤔 U got the big battery link have..?

@LithiumSolar

Жыл бұрын

I don't think they've sold these cells in a couple of years now.

if they was pulled from a faulty pack then they should have sharp points from where they was welded to and then the bus wiring was removed. even if you dremel down the sharp points there would be evidence of salvaging. unless they are playing it safe and they dont want the same lot numbered cells being used in newer revision bms packs be very carefull poking anything metal on the positive end of a battery cell if you was to touch the + and - together you would have a short and bad things can happen. you should use plastic pointer instead. a single cell you may get a spark and destablize the cell if shorted but a large battery pack big sparks., fire and blinding light and molten metal.

@BigBattery

4 жыл бұрын

You can see how we demanufacture these model 3 cells form its original pack to the individual cell here: kzread.info/dash/bejne/lZ-czLuGcaifqco.html

Why does the Title say Telsa?

@LithiumSolar

4 жыл бұрын

These cells are from Tesla Model 3 electric vehicle batteries.

@ahaveland

4 жыл бұрын

@@LithiumSolar Telsa != Tesla :-)

@LithiumSolar

4 жыл бұрын

OOOOO crap. Thanks!

@ahaveland

4 жыл бұрын

@@LithiumSolar Dylsexics of the world untie, you have nothing to lose but your brians! :-)

@sreekumarUSA

4 жыл бұрын

LithiumSolar 073120/1210pst. Please no need to be perturbed by the slip of words, typos and mistakes. Show me one single person who has not erred. To be honest, I have spoken at an audience “Telsa”, inadvertently. I was not corrected by those eminent scientists and researchers. It is called understanding, it is called judgement. We all make many mistakes in life and it’s out of those mistakes, we correct ourselves and that’s called ‘experience’ . Sir, go on, do your relentless service to humanity, we care. You are one of a kind. We need you. Stay safe and 73s..

since batterhockup sells them for 2,49 big battery also does a sale )-:

@LithiumSolar

4 жыл бұрын

Yes, it seems a price war has begun lol. That just means cheaper prices for us! :)

for a good high-current load, just use a long spool of very thin magnet wire, (unspooled, of course) into a plastic tub of water. it's amazing how much current and time it takes to heat up water this way. You could probably dump 40-60A into that wire for 18 hours before you had to change the water, depending on how big of a plastic tub you use. kzread.info/dash/bejne/iXl3uZpxoq2_oqg.html

How many hrs of pokemon go would that last you for?

@ketas

4 жыл бұрын

that's funny because i started with li-ion because i wanted to play 12h of pokemon go (have done 24h too) li-ion was one of 3 things i didn't want to touch, li-ion (fire), hv (death), lasers (retina damage) but it was only option now i have way too much of 18650 cells and fallen pokemon go interest but of course i don't stop. as portable packs became boring as they just don't ever run out, i'll be building house(s) backup power next, following the electric bicycle probably and then maybe a car it's fun!

DeltaV you say.. KSP explosions INTENSIFY

Hello, do you have an email address? I have a few questions regarding my own project I am dreaming up and would love some input on any recommended components. Additionally, do you build custom packs for purchase or would you consider it? I have a unique circumstance that may interest you. Thanks, -Matt

I'd buy the pack you built here, if you're willing to sell it

@LithiumSolar

3 жыл бұрын

I don't sell batteries unfortunately.

error 3211? a5? watchdog error?

@LithiumSolar

3 жыл бұрын

Yeah I really don't know what that was about, but I didn't want to look deceptive by cutting it out. All I did was unplug and replug and it worked fine after. No idea.

😁✌🖖👌👍😎very cool

You sure know a lot of battery charging tricks.

@LithiumSolar

3 жыл бұрын

It's a fun hobby, I'm constantly learning something new every day :)

@Beaches_south_of_L.A.

3 жыл бұрын

@@LithiumSolar could you help me navigate the ins and outs of purchasing a spot welder. I seen cheap ones and wonder if they are just junk and a waste of time and money. Any input would be much appreciated. If you have a moment. Thanks.

You were almost better off just buying a couple 3S LiPO packs from an RC hobby shop

@LithiumSolar

3 жыл бұрын

Maybe. I enjoy the hobby of making my own though.

@Pops180

3 жыл бұрын

@@LithiumSolar same here honestly. I did something similar for my kids powerwheel

Please make a video of you trying to take this battery through airport security

@LithiumSolar

4 жыл бұрын

No thanks. I'd prefer NOT spending a night in prison while they sort it out... LOL

@ZubairKhan-vs8fe

4 жыл бұрын

@@LithiumSolar lol

I got these from battery hookup $2.49 each

@LithiumSolar

3 жыл бұрын

Yes, it seems the competition has driven the price down quite a bit since this video lol

You need to work with KZreadr, #StyroPyro Your guys brains belong together. You guys would make the most amazing invention since the creation of the Ipod. Who cares about who paid what.. and make millions in views alone!

@johnbrown2163

4 жыл бұрын

I see you guys making worlds most powerful self charging laser. IE Free Electricity and Power.

damn Tesla spot welder makes a "Model ///" shape .. Elon is crazy ~_~

@bretjcbsn22

Жыл бұрын

It’s actually Panasonic 😅

I'd change the thumbnail image to something less Homeland Security attracting 😂

@LithiumSolar

4 жыл бұрын

I would welcome Homeland Security to come check my BATTERIES at any time ;)

the cells have diameter, not thickness

@LithiumSolar

4 жыл бұрын

Thank you for that correction :)

Why dont use a Kweld? You can be much more productive.

@LithiumSolar

4 жыл бұрын

How is the kWeld more productive than the spot-welder I have currently? It works great...

@BastelPichi

4 жыл бұрын

@@LithiumSolar You can set in the settings that as soon as you touch the nickel with both electrodes, it automaticly activates the spot-weldig proces.

@LithiumSolar

4 жыл бұрын

I prefer to use the pedal so I have control over when the weld happens. I don't like the weld-on-touch and yes I know you can configure a delay for it, but still... I want the control of it.

@BastelPichi

4 жыл бұрын

@@LithiumSolar Yes thats personal. But ive you only got a limited time budget, its preatty helpful

It's great that you want people to sub, but what will you do for that sub. I'm I the only one that thinks that when someone Subs, that those channels should also sub those others. If not that's fine, But we will not sub any longer.

@LithiumSolar

4 жыл бұрын

You should only subscribe to things you're interested in. If you're not interested in the videos I'm putting out, by all means, feel free to NOT subscribe :)