Thursday, May 19, 2022

Re: [electricboats] LifePo4 build questions


Aluminum, Flat Bar Stock, Thickness (Decimal) 0.25 in, Width and Length 4 in x 72 in


These bus bars can do 100 amps all day and not get warm to the touch. 

Pics on Instagram


Note the black "spacers" between the bus bars. This keeps the pressure off the cells and does not let them touch. The entire metal cell casing is positive. You need more than just the green plastic covering to keep the series cells from coming in contact with each other. 

Matt Foley

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On May 19, 2022, at 2:19 AM, bobkart <couch45@msn.com> wrote:

"I have 6061 in various thicknesses in my shop."

Note: the alloy I referenced is 6101.  The 6061 you mention is much more common:

https://www.mcmaster.com/bars/material~6061-aluminum/

I'm sure it will conduct electricity acceptably well, but I do see maybe 30%-40% better conductivity for 6101:

https://www.makeitfrom.com/compare/6061-T6-Aluminum/6101-E-AlMgSi-91E-Aluminum

If you already have 6061 on hand, but would need to buy some 6101, it's probably not worth the conductivity difference, especially when you're going oversize anyway.  In my case I didn't have either on hand, so it made sense to get the one that conducted better (assuming similar price).

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