Is it ok to charge at low temperature? (0c or lower)

Discussion in 'Clarity' started by bigbug, Oct 26, 2018.

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  1. bigbug

    bigbug Member

    As winter is coming, there are more chances that I need to charge in public station below 0 degree (C). But I remember reading somewhere that battery degrades faster when charge at low temperature. Can anyone comment on this?
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  3. marshall

    marshall Well-Known Member

  4. KentuckyKen

    KentuckyKen Well-Known Member

    “Trust the Force, Luke”...err..., I mean the Battery Management System.
    insightman likes this.
  5. AnthonyW

    AnthonyW Well-Known Member

    The Canadians have dedicated battery warmers. Here in the US we have a thermistor system. With a thermistor, internal resistance is higher at lower temperatures. Thus, initial charge energy does not go into the battery but is lost as heat-heat that warms the battery. As the thermistor heats up resistance decreases and charge starts to go into the battery. I don’t believe that the thermistor system is as robust as the dedicated battery warmer or else the Canadians wouldn’t have a different system. That said the operators manual says that at -22F the car will not start. One could assume that above that temp it is okay to charge.

    Sent from my iPhone using Inside EVs
    insightman likes this.

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