battery contact for high current LiFePO4 cells

wattwatt

Member
Joined
May 21, 2018
Messages
55
I have 30-ish Headway 38120 LiFePO4 cells with flat tabs/tops (not the screw style) and building a DIY battery holder for them so I can do some cell and packtesting (similar to the ones for 18650's:https://www.amazon.com/Battery-Case-Holder-4x3-7V-18650/dp/B01FSDKXRI). I was going to use D cell battery contacts (like these:https://www.amazon.com/gp/product/B00LQPWLJ6/), but I learned D cell batteries only have a max amperage of 4 to 5 amps - I'll be testing these38120's up to30 amps max(they're rated for 100 amps, though). Any idea what metal/material I can use as contacts for up to 30 amps and that can also be soldered to (for 10 gaugepositive & negative leads andBMS leads)??
 

Redpacket

Well-known member
Joined
Feb 28, 2018
Messages
1,265
Perhaps brass strips with a spring like your link behind them?
 

wattwatt

Member
Joined
May 21, 2018
Messages
55
Redpacket said:
Perhaps brass strips with a spring like your link behind them?


Can brass handle 30 amps? If so, can I bend it around a spring and it (the brass) won't break?
 

Korishan

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Staff member
Joined
Jan 7, 2017
Messages
6,423
This is what you're looking for:
beryllium copper spring
https://www.google.com/search?client=firefox-b-1-d&q=spring+beryllium+copper


image_gdmrld.jpg
 
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