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Portable Battery Pack

Discussion in 'Charging Standards and Infrastructure' started by STxTesla, May 23, 2012.

  1. STxTesla

    STxTesla Sig #1278

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    To calm some of the range anxiety that Tesla owners may develop while traveling long distances, it might be a good idea for Tesla to offer a portable battery pack...distance extender.
    The portable battery pack could get you out of a bad situation if you ran out of charge and get you to the nearest charge station.
     
  2. VolkerP

    VolkerP EU Model S P-37

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    Aux battery has been discussed before - any additional battery capacity is better used if included in the main battery, and the driver should pay attention of low SOC warnings issued by the vehicle.

    I see the possible scenario to walk and get more juice with the portable battery, though - resembling the spare can for fuel. But would it be practical? A portable pack of 200 cells (e.g. Panasonic NCR-18650) weights 10kg (22lbs) and holds 2.4kWh - enough to move a Model S for another 10 miles. And you have to walk to the next outlet, charge it, and walk back - or get a hitch.
     
  3. Iz

    Iz EVs are here to stay

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    An Aux battery pack would not be a bad thing. Based on the previous post, a 20kg pack could squeeze out ~ 20 miles. Another application for such a pack would be testing new battery & capacitor chemistries. Not sure how TM would see this; but new battery claims can be field tested using these smaller portable packs. Eventually, these smaller packs may even rival a 300-mile pack.
     
  4. Kevin Sharpe

    Kevin Sharpe Active Member

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    IMO it's just easier and cheaper to get dumb sockets installed everywhere so that you can stop and recharge... wouldn't take long on a 40A socket to get your 10 to 20 miles extra range.
     
  5. Eberhard

    Eberhard #421 Model S #S32

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    It would be a very good idea indeed. I can charge the extra pack from my PV, while driving around. Next day, i can charge my second one.
     
  6. VolkerP

    VolkerP EU Model S P-37

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    The aux pack cannot be used to drive the vehicle, unless it has beefy power density. This comes at a trade-in for energy density and mass/volume, both adverse for portability.
    You would hook up the aux battery to the car and wait until charge is transferred to the main battery.
    Eberhards idea of "charge one, drive one" appears to me like a full battery swap. If the vehicle doesn't support that, you can use two vehicles. Or if parked for longer time, you could transfer charge from a stationary battery.
     
  7. STxTesla

    STxTesla Sig #1278

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    Perhaps AAA will be around with charge packs in the future to assist those that run out of charge on the highways.
     
  8. Adm

    Adm Active Member

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  9. samcarney

    samcarney Sam C

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