how hot would be too hot on the battery bank with windows down?

Discussion in 'Gen 3 Prius Technical Discussion' started by priustexasbob, Aug 27, 2011.

  1. priustexasbob

    priustexasbob Member

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    the search function didn't turn up this answer.

    how hot is too hot to roll with the windows down on the battery bank in the back of the car? ie: 95F+

    not that I would drive with the windows down at that kinda temp, just wondering what affect it has.
     
    #1 priustexasbob, Aug 27, 2011
  2. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Battery air intake fan has 6 speeds (7 if you count OFF). When the battery temp read over 111 deg F and outside temp was around 90 deg F, my fan was running at speed #3.
     
    #2 usbseawolf2000, Aug 27, 2011
  3. F8L

    F8L Protecting Habitat & AG Lands

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    Not much as long as there is air circulation. I never use my AC unless it's over 105deg. I've been driving for years in 95+ temps with my driver's side window down and the rear passenger window cracked to reduce noise. This hasn't been a problem for the car.
     
    #3 F8L, Aug 27, 2011
  4. David Beale

    David Beale Senior Member

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    The standard answer is "If you are uncomfortable, so is the battery."

    The -reason- you don't find a definitive number stated anywhere is there isn't one. The hotter the battery, the worse it is for it. Below "room temperature" the colder the battery the worse it is for it.
    The battery will last the longest just below room temp. which is usually considered STP (standard temperature and pressure), between 20 and 25C.
     
    #4 David Beale, Aug 28, 2011
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