Quote:
Originally Posted by Stubby79
Any reasonable option(s) to keep the li-ion warm or warm them up before use?
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Yes.
Here is an interesting video on supercaps:
Personally the super cap idea is really cool though. If you could wire the super cap starting battery in parallel with the li-ion high capacity accessory battery and have a switch to hot swap them you would be golden.
Now you guys just need to do some hands on testing.
I recommend a radiant heating loop wrap on the battery, a small water tank with a heating coil, or maybe even 3m Novec if you're feeling appropriate, and in the summer you could just reverse the goal and take energy out. You would just need a bms to start. Arduino with enough inputs could probably cover it.