Quote:
Originally Posted by redpoint5
The problem with LiFePo4 is that it becomes permanently damaged when charged in sub-freezing temperatures.
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According to my research (with the possibility of a lithium powered car project this summer), this may not actually be the case. There are many threads on DIYelectriccar.com that say sub-zero charging does not wreck LiFePO4 batteries. Sure, they won't take much of a charge right away, but they quickly heat up and do just fine. It seems that when charging at C/10, temperature doesn't matter.
Real experience on cold temperature charging of lithium cells? - DIY Electric Car Forums