Over 77 Fahrenheit ruining batteries?

[Hummina Shadeeba]

https://evwest.com/support/21700_M50LT_datasheet.pdf

Luckily I live in a cool area.
What’s a safe way to get airflow through a battery in a box?

 

[calab]

Mini 12v electronic cooling fans attached to a custom battery case with airflow in mind.

 

[TDA78]

That temperature derating data would be better represented by a graph. Imagine a sloping line from 3C @ 25°C to 1.5C @ 55°C.

 

[calab]

Some of the bus a123's had wider spacing between the 26500's for better cooling.
3d print build/make your own 21700 holders for your INR21700M50LT along with a custom case.

 

[Hummina Shadeeba]

The battery is already made and just have to put the three in series, then put them in a steel box welded to the bottom of the frame.

I feel like fans in a closed box would just be blowing the heat around like a convection oven.



I think will use thermal pads between the big nickel strips and the steel box. The batteries actually came with just such a thing already (the grey putty-like stuff on an unopened battery in the background under a removed bms).