The latest 21700 lithium cells - Free Gerber file

[@elijahmalik9365]

I have a little suggestion, leave some security zone at the edge. This makes it easy to put a single module into a metal box.

[@freakern]

Thank you Jehu for showing us, how you create these boards. You really motivated me creating my first pcb by myself. I did a lot of mistakes, so it took me a lot of time to finish my first iteration, but this is how we all learn, right?

[@anarpearls9785]

You say you are self taught but you design better than some ivy engineers

[@japrogramer]

Appreciate the open sourceness of battery diy

[@acalciu]

Damn, all that high-speed screen flashing will give someone an epileptic seizure.

[@Shmade0304]

Now we’re really making diy powerwalls 🔋🔋🔋👑👑👑🐐🐐🐐

[@ElViejoNL]

My bread and butter. I've been designing circuit boards for 26 years as a Cad Designer. If you ever need support, reach out to me. Great tutorial by the way.

[@JohnNorrbin]

Nice fart at #7:22 🤣🤣🤣

[@jehugarcia]

It was bruce my dog...... lol

[@markreed9853]

I would like to see a case like a battery for a scooter that can open up and you add your own 18650/21700 cells into, then a number of these clip into a wall case for easy in and out removal ( holding 5-10 maybe) which then checks and balances them. You could then use this as a powerwall style home battery and change each pack as they degrade for newer cells.

[@elijahmalik9365]

OMG,I want this module 2 years.Now the price of 21700 has increased by 3 times, and the first 5000mAh's new battery is as long as 1 dollar.I am designing a 4680 for QC5 + (48V 240W) scheme.

[@acalciu]

Where will you find 4680 cells? They are not yet available to the public.

[@Darer007]

@@acalciu salvaged Cybertrucks

[@acalciu]

@Darer007 cybertruck production to start 2023. Add another 2 years for the first salvaged ones become available and that makes it 2025 before you see the first cell. Use your time wisely and do something useful in the meantime.

[@elijahmalik9365]

@@acalciu There aren't a ton of cheap 4680 batteries available right now, but there are a handful of samples that will allow me to make a kit ahead of time right now.

[@joeows6537]

Fortunately there's plenty of really good 18650s out there that can really pack a punch. What I would like is something along the lines of a 15 500 battery like a triple a that packs a punch of a 21700. In the e-bike world size really does matter.

[@D9ID9I]

Would love to get pure 14s board. And that way 16 pin connector will be utilized way better.

[@joramotorsportteam3277]

Where is another parts? Holder, contacts and anoter? :_

[@jameshancock]

Do you have a 32700 LiFePO4 8s or 4s version of the board?

[@BoostedNW]

What program are you using to design the pcb's??

[@SurakIII]

4680? I know, there aren’t enough of them out there in the wild. I can dream though.

[@jehugarcia]

What the hell? Someone impersonating me?

[@Lenbo1977]

Did u realize what u did 7:34 into the video...I laughed so hard because while u was speaking I can tell u was concentrating on something else then u leaned forward and thats when it happened 💨and I realized why u was so distracted..😂🤣😂🤣...on a serious note, I really love your videos 📹 that's where I get most of my battery knowledge..So thank you so much for that..

[@jehugarcia]

It was my dog

[@Utube2Itube]

How is the contact resistance with those cell-swappable cell holders? I always found them to result in high voltage drops in high power applications. I much prefer spot welding with nickel tabs to minimize the internal losses. That just gives a much more well defined electrical connection.

[@jehugarcia]

they support 1c rates, thats why I fuse these boards at 5A

[@ContentPLUS1]

You're awesome!

[@amham48]

`Great tutorial! How do you know how far should each separation, open space, be (between +/-, gnd) to avoid voltage flash over/shorts? The distance would need to be adequate, plus some margin?

[@jehugarcia]

I don’t know

[@dantyler6907]

@@jehugarcia Kinda' takes away from the value of the the whole venture. How does the capacity of the 21700 compare to the 18650?

[@86OEd]

Very interesting...!

[@NotaRobot_gif]

Isn't there a lot of resistance because there's so many "touching" connections and not spot welds? I feel like there's a resistance/fire risk?

[@jehugarcia]

Not if you know what you are doing. These boards have been used for a few years now, no problems

[@danielmunnemann2987]

What software do you use there? Looks easy and good :)

[@MrLandphill]

what are the dimensions of this board?

[@putteslaintxtbks5166]

I'm wondering what the weight per each single cell and watt hour per kg. is. Is would help in desighing a ebike battery. Thank you.

[@acalciu]

Read the battery spec sheet.

[@putteslaintxtbks5166]

@@acalciu Looked again and don't see it. Two versions 4000mah and 4500mah. No wt. I can see.

[@philipjfry9312]

How bout him building an electric motorcycle like sondors?

[@MagivaIT]

21700 ?? you mean 2170 right ? the 21 and 70 is the width and length, it was said a long time ago that hte extra 0 for 18650 was a mistake as its really an 1865 I see you even put 2170 on one side of your board.

[@jehugarcia]

Call it what you will

[@mehdikhan]

Are you specifying 2oz or 3oz copper?

[@jehugarcia]

1oz should be enough, unless the holders can do way more than 5A which I doubt

[@JamesDoylesGarage]

I HAVE A BURNING QUESTION ! Have you ever looked at batteries made of Hemp?

[@Kaickong]

you age so much in 10 years

[@jehugarcia]

age catches up to everyone. My deal with the devil ran out.

[@mackpowerev1092]

Jehu..pls how can i reach you..?

[@jehugarcia]

you just did

[@jehugarcia]

[e-mail]

[@denniskramer9788]

Are cells individually fused some how.....lessons from Tesla and others.....

[@jehugarcia]

yes

[@cooltimo]

Are you going to sell your 21700 cells?

[@jehugarcia]

jag35.com/products/4000mah-12a-3-65v-21700-cells-lishen-lr2170sa?_pos=1&_sid=fae64a628&_ss=r

[@philipjfry9312]

All right let's win us some battery lol joke I can't nothing