Building battery packs. Need advice

Batteries, Chargers, and Battery Management Systems.
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Dr.Electric   1 mW

1 mW
Posts: 10
Joined: Jun 15 2014 4:16pm

Building battery packs. Need advice

Post by Dr.Electric » May 08 2015 9:33am

So I just bought 224 Samsung inr 25 r cells.

And I'm planning to build 3 battery packs 2 packs with 13 s5p for my friend and his wife and one 13s7p for my cargo/kid bike.
But I need a little advice concerning BMS and charger.

I am considering this one:
http://www.ebay.com/itm/48V-54-6V-13S-4 ... 33a0bef155

From Su power.

What I'm looking for is something both cheap, but also of good tested quality.

Any ideas ore suggestions?

I looking at 25A draw in current but will probably prefere to go with at least 40A BMS.

Any ideas for at power supply. Live in Norway and need 220 volt compatibility.

What size on Nikkelstrip do you suggest for welding. 10 mm*0.15mm ?

Best regards
Johannes :idea:

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riba2233   1 MW

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Posts: 1853
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: Building battery packs. Need advice

Post by riba2233 » May 08 2015 4:01pm

For welding and nickel size: -for parallel connections as this as possible, and for series connections I don't recommend nickel, solder copper wire on the nickel between the cells or weld copper sheet.

I had good experience with this BMS:

http://www.ebay.com/itm/Battery-Protect ... 3a8e707b5b
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

Dr.Electric   1 mW

1 mW
Posts: 10
Joined: Jun 15 2014 4:16pm

Re: Building battery packs. Need advice

Post by Dr.Electric » May 11 2015 2:38am

That BMS is perhaps a litle bit ont the small size i current carrying capasity.
I have written to Bestech for a quote.

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riba2233   1 MW

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Posts: 1853
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: Building battery packs. Need advice

Post by riba2233 » May 11 2015 2:53am

Maybe this one:

http://www.aliexpress.com/store/product ... 21963.html


Bestech will cost a lot, because you have to order at least two, and add a shipping cost.
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

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