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Charging HV Battery to MFD full SOC

Discussion in 'Gen 2 Prius Main Forum' started by Presto, Apr 15, 2006.

  1. Presto

    Presto Has his homepage set to PC

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    I can't believe I didn't know about this feature before, but it may interest folks who live in flatter areas that never see the SOC go to the green bars. After having a discussion with my friend, he told me that I should be able to charge the HV to a full SOC (green bars) without regen braking down a long hill.

    1) Put the car in D (drive)
    2) Fully press down the brake pedal
    3) Press down gas pedal (the further you push it, the greater the charge rate)


    The car will charge at a max rate of ~60 amps. Once it starts to reach full SOC then it will not charge as quick. It sucks down the gas, but it's a good way to get a green SOC. The Prius never ceases to amaze me :)
     
    #1 Presto, Apr 15, 2006
  2. Tideland Prius

    Tideland Prius Moderator of the North
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    Yeah but I don't like idling hehe. Besides, Vancouver's hilly enough.
     
    #2 Tideland Prius, Apr 16, 2006
  3. Ray Moore

    Ray Moore Active Member

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    We did this prior to running the 1/4 mile at the Houston raceway. The only problem is that it heats up the inverter and battery so some of what you gain, you lose back to increased resistance from heat in the components. We tried to let it rest prior to the run but of course you want the engine warm. I'm not sure what the best balance is for achieving the fastest times. I'm sure a can-view would help but for some odd reason, I don't have one yet. Our fastest time was 17.8 seconds at 87.7 mph.
     
    #3 Ray Moore, Apr 16, 2006
  4. Presto

    Presto Has his homepage set to PC

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    I ran into a similar problem with the HV battery getting too hot after a full charge to be useful under immediate hard acceleration. I'm wondering if there is a method to cool the battery quicker, like running the a/c directly into the battery vent.
     
    #4 Presto, Apr 16, 2006
  5. Frank Hudon

    Frank Hudon Senior Member

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    the problem comes in from the internal cell temp. We have the same problem with forklift batterys with the middle cells of the battery boiling at the end of an extended charge. Ideal is 8 hours charge followed by 8 hours of cooling and then 8 hours of use. It's the internal temp that is slow to drop to a temp that leaves the battery in it's most effecient state.
     
    #5 Frank Hudon, Apr 16, 2006
  6. Amyshubby

    Amyshubby 2017 Prius Prime Advanced

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    <div class='quotetop'>QUOTE(Presto @ Apr 15 2006, 11:41 PM) [snapback]240389[/snapback]</div>

    I live on Long Island. It's a long flat island. Interestingly, my car usually has either the green bars or is one bar below. I see the green bars on almost every trip.
     
    #6 Amyshubby, Apr 16, 2006
  7. cwerdna

    cwerdna Senior Member

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    #7 cwerdna, Apr 16, 2006
  8. Presto

    Presto Has his homepage set to PC

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    I think what contributes to the Prius' time is the quicker-than-average acceleration thanks to the high torque of the electric motor, and the lack of having to shift with the CVT.
     
    #8 Presto, Apr 16, 2006
  9. cwerdna

    cwerdna Senior Member

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    #9 cwerdna, Apr 16, 2006
  10. hobbit

    hobbit Senior Member

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    Question is, how did you launch? You'd probably do best having
    the ICE already running, in "B", and have the accelerator slightly
    pressed so that the instant your left foot comes off the brake,
    all that lovely combined torque is right there. Wasteful as hell,
    but probably what you want for the quarter.
    .
    _H*
     
    #10 hobbit, Apr 16, 2006
  11. 240sxer

    240sxer New Member

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    #11 240sxer, Aug 29, 2006
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