26650 94v build questions!

speedy1984

100 W
Joined
Sep 28, 2018
Messages
248
Ok so the time has come to start welding my 26650 cells together. Now after some research I found that the pure nickel strips I will be using will take 45a per strip between each cell. As I'm after as much amps as possible from this build (22s 20.000mah 26650)These cells are rated at 50a burst so 200a burst is what I should get ish!So with that in mind should I layer my strips four times between each cell plus between +&- for current sharing. Looked at a few pack builds now but as this is my first build from scratch I thought I would ask👍
 
20Ah in a 26650 cell? You might want to check that.

Might also want to verify they'll do that 50A peak current, too, and for how long before they get hot, when embedded in a pack, (so you'll know they'll actually do what you want without damage).
 
Hi, I'm new to this forum, and Li-ion cells and chemistries are one of my interests. Not sure the mfr of your 26650 cells, but A123 has a 26650 cell that has a max continuous discharge current of 50A and can peak/pulse for up to 10-sec. at 120A. It's an LFP, so cell voltage is 2.3V nom. Multiple spot welding on each tab will minimize hot spots.
 
amberwolf said:
20Ah in a 26650 cell? You might want to check that.
).
I think we all know that is impossible.. :bigthumb:
But we may be missinterpreting the description..
Reading between the lines, the OP may mean the 22s pack is 20,000mah total.?
And at 200a burst from the pack using 50a burst individual cells,...that would suggest a 4p arrangement od 5,000 mah cells . :?:
There are several 5000ah , 26650 LiCo INR cells that have those specs.
It would be good if the OP can clarify exactly what cells he has.

But , in reply to the original question, ..yes double up on those strips , or find a better method for the bus bar interconnects. 200a is beyond most nickel strip methods.
 
https://www.instagram.com/p/Bu90_thHA7K/?utm_source=ig_share_sheet&igshid=c802mvzvyx9e

Hi ,these are the cells in question guys. Sorry for not explaining myself a little more clear. Also thanks for reply
 
The link just gives me a blank page. What is it supposed to show? Is it the manufacturer or seller site with specifications? Or is it just an image?

If the latter, then you should attach the image directly to the post in the attachments tab, so that anyone that can see the post can see the image.

If the former, perhaps you can copy the text information and paste it into a post.


If it's something else than those two, you'll have to explain what it is supposed to show.
 
AW, its an instagram photo of a bunch of boxes, marked 'Llitokala 26650"
So i guess they are this cell...
https://lygte-info.dk/review/batteries2012/LiitoKala%20INR26650-50A%205000mAh%20(Black)%20UK.html
OP ,..please confirm .
 
Hillhater said:
AW, its an instagram photo of a bunch of boxes, marked 'Llitokala 26650"
So i guess they are this cell...
https://lygte-info.dk/review/batteries2012/LiitoKala%20INR26650-50A%205000mAh%20(Black)%20UK.html
OP ,..please confirm .


Hi, yes these are the correct cells I was talking about.
 
According to a google search, a number of sites show they are only 5Ah cells, not 20Ah.

They also say they are 50A (assuming short bursts), so I wouldn't try to pull 200A from one.
 
amberwolf said:
According to a google search, a number of sites show they are only 5Ah cells, not 20Ah.

They also say they are 50A (assuming short bursts), so I wouldn't try to pull 200A from one.

200a from one cell :lol:
 
https://www.instagram.com/p/BwQULrIHZif/?utm_source=ig_share_sheet&igshid=1mvv7qi4cwbdw
Ended up going over every connection three times and used .2 pure nickel strips.Hoping that should handle some short high amp burst👍
 
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