Lithium battery charging at or near freezing
Here's an issue I have come upon, freezing temperatures. I see the Lithium batteries will discharge down to 0 degrees F and shouldn't be charged below freezing 32 degrees F. So how would you handle...
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GordonThree wrote:MEXICOWANDERER wrote:
Hoe much HEAT does max charge rate develop in a lithium battery? I'm thinking a dedicated line from the hot water heater, volume throttled by a return line orifice might be better than nothing. Means foam covering the lines and a teensy pump.
Nissan does this, and maybe Tesla. Water cooled batteries. I think they use electric heating pads for cold weather. Haven't seen any aftermarket "drop in" types setup for water heating or cooling.
Really surprised at the prices that are charged for these batteries that heating pads aren't included along with a BMS that knows how to use them.
they don't use heating pads in Tesla, the entire thing is built into a 2 part pump system built primarily out of the coolant tank. which uses a heat ex changer.
to generate heat, the drive motors are intentionally stalled, to generate the heat needed to heat the battery packs. i don't remember how the cooling is done, prolly just fires the air conditioning up and reroutes it to the heat ex changer again.
