TheButcher Posted September 22, 2021 Share Posted September 22, 2021 Posted for the benefit of the people here that assemble their own lithium batteries. Check out the amount of casing plastic that protudes over those FETs. Even though there is a thermal pad involved that casing plastic can't be helping with heat conduction & dissipation. The silpad itself is even covered by the casing plastic in places. Quite surprising given the price of a Daly BMS. Caveat emptor. Quote Link to comment Share on other sites More sharing options...
Sid Genetry Solar Posted September 22, 2021 Share Posted September 22, 2021 21 minutes ago, TheButcher said: Check out the amount of casing plastic that protudes over those FETs. Even though there is a thermal pad involved that casing plastic can't be helping with heat conduction & dissipation. So I don't think these FETs will be dissipating much heat. They are simply on/off switches, and a large number are used to try to prevent them from "fusing on" with a short circuit / high surge load. I would expect any heat generated to be extremely minimal. And then of course there's the 0.03A (max) balance things...little resistors with transistors to turn 'em on. Next to useless on the large battery banks often used in off-grid systems....... Quote Link to comment Share on other sites More sharing options...
TheButcher Posted September 24, 2021 Author Share Posted September 24, 2021 Gets hot enough to justify a couple of decent heatsinks and a fan ... Quote Link to comment Share on other sites More sharing options...
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