battery design and layout 14s5p

please have a look at the following layout, i'am planning to spot weld this in the near future.
this should become my first made (test)battery. any help is well appreciated.

batteries are recycled power tools cells with discharge cont 10A. the pack should be able to deliver 30A max.
nickelstrip is 8x0.15mm,

two questions remain:
1. would this work? any critical questions?
2. what is the correctwelding order? parallel first or one side first? and then series connection? what if i cant do all parallel first? :huh:









many thanks for answering

Dont have much say but it looks ok. You will have a bit different load on the right hand side of the pack but nothing major I would say if the cells can handle the load per cell.

Connecting the cells in a particular order doesn't really matter. The important thing is to make sure your work surface is clear of any kind of debris. There was another user that ended up getting a small piece of solder ball or silver strip caught on the Pos end and lodged between the shell and raised hat. He ended up with a smoking pack after awhile. So make sure you keep the area clear as you rotate and flip the pack around.

I'm assuming you're using an existing pack that is already assembled and you're just rewiring it for your needs. That's the reason for the odd shape?

Korishan said:

Connecting the cells in a particular order doesn't really matter. The important thing is to make sure your work surface is clear of any kind of debris. There was another user that ended up getting a small piece of solder ball or silver strip caught on the Pos end and lodged between the shell and raised hat. He ended up with a smoking pack after awhile. So make sure you keep the area clear as you rotate and flip the pack around.

I'm assuming you're using an existing pack that is already assembled and you're just rewiring it for your needs. That's the reason for the odd shape?

Click to expand...

yes..., so many bad stories, burned houses, battery fires, it is very scared after reading all that. I call it really into question whether i should proceed this battery thing. i dont know if i could sleep quiet if they where thousands of recycled cells discharging all night. :dodgy:question forwardedtothese mass storage holders??

this is just an ebike test battery for experimenting. the odd shape resulted from fitting it to the frame and case.
maybe a few encouraging words would be better thank you very much for the clean workplace tip. i will take care on that one.

Encouraging..... hmmmmmm .... Well your not dead YET? lol Just kidding. These cells are actually really safe. The issues arise due to neglect or severe Issues. Ive had cells vent with little more than a puff. Now if there is a thermal runaway event those can get nasty but Ive processed over 2000 cells so far... in my house. And while I do have provisions for thermal issues via 2 large buckets of dry sand to throw any offending cells into then cover them with sand. as well as where I charge is shielded by a metal shroud that if there were a fire it would be contained to that area and not catch anything else on fire.