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Backup Battery for low battery scenario?

Discussion in 'Charging Standards and Infrastructure' started by Iamthecaliflower, Jan 25, 2012.

  1. Iamthecaliflower

    Dec 27, 2011
    #1 Iamthecaliflower, Jan 25, 2012
    Last edited: Jan 25, 2012
    High Capacity Backup Battery Will Keep You Powered For a Week

    Let's assume you need to drive around 300miles straight, for some reason. However, for some reason you only get 270-290miles per charge. Would it be possible for something like the above device to give you enough juice for say an extra 100-300miles, assuming there isn't a charging station near by where you run out of juice? In theory, this might only cost an extra $500-1000, if that. Would this further help with range anxiety? Does something like this exist?
  2. VolkerP

    VolkerP EU Model S P-37

    Jul 6, 2011
    #2 VolkerP, Jan 26, 2012
    Last edited: Jan 26, 2012
    From the linked data sheet:
    That makes for 49.5Wh of energy. Model S uses 300Wh per mile so not much help here. If you calculate kWh/kg or kWh/$ it loses out against Tesla battery pack by far.

    There is no reasonable way that an extra battery helps with range after your main battery passes out. Always better to have all batteries contribute their power all the time & absorb energy from regenerative braking. This transcribes in better warranty terms for the larger Tesla battery packs.

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