2x 7s10p in Series (Triangle Pack)

Batteries, Chargers, and Battery Management Systems.
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doomy
1 µW
1 µW
Posts: 2
Joined: Feb 07, 2018 11:39 am

2x 7s10p in Series (Triangle Pack)

Post by doomy » Feb 14, 2018 5:16 am

Hello everyone,

This is going to be my first Pack and it would be great if you could give me some input on how i can improve it.

I plan on using it with a BBSHD motor so max 30A current draw.

My Cells are recycled Sanyo NCR18650GA.

The pack will be seperated in 2x7s because i want to balance charge it with my iCharger 208B.

2018-02-10 (4) - Kopie - Kopie.png
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I use a DIY microwave transformer spot welder with 15ms preweld and 30ms weld setting.

I have bought 0.15x10 and 0.15x25 pure nickel strips.

Plan on using the larger strips for the rectangle pack and some for the triangle pack where the space allows it.

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IMG-20180213-WA0003.jpg (95.67 KiB) Viewed 59 times

Will post more pics while the build continues.

Thanks!!

doomy
1 µW
1 µW
Posts: 2
Joined: Feb 07, 2018 11:39 am

Re: 2x 7s10p in Series (Triangle Pack)

Post by doomy » Feb 15, 2018 9:07 am

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I just glued the triangle pack together with hot glue. I was scared somtimes that the nozzle could burn trough the insulation when i glued the strips in the jig. This was luckily not the case tough.

The hot glue gets hard very fast and when i tried to glue the second row to the first row it was not completely straight. I had to use force to separate the batteries again and tore off some of the heat shrink from a few batteries.

I continued gluing the rows together first and then just placed them where they should go and tried to fill the holes between the batteries. This was no good because the surface area of the glue was too small and it was very messy. You can see it from the 2nd to 3rd row.

I then just placed the pack in front of me, prepared the row so i can just flip it up to the pack, quickly put some hot glue on it and then flipped it up and pressed it to the pack. This worked quite well.

So the pack is ready for welding now.
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IMG_20180215_145203.jpg (117.33 KiB) Viewed 26 times

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