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Leaving traction battery SOC low overnight

Discussion in 'Gen 3 Prius Main Forum' started by hummusdude, Feb 3, 2020.

  1. hummusdude

    hummusdude New Member

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    The particulars of my geography make it easy for me to drive the last few miles home at low speed in EV mode. Recently, I've been in the habit of doing this and it uses up all of the available battery down to 2 bars, right before the car starts the motor automatically to charge the traction battery. In the morning, the motor will run for 10 minutes or so regardless of the charge on the traction battery, so it seems like a more efficient use of that motor time. I'm wondering if this is putting excessive stress on the traction battery.
     
  2. bettergolf

    bettergolf Active Member

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    I wouldn't think so the battery is programmed to protect itself. The engine runs to warm up so I think it's efficient to have it charging if it's going to run anyway.
     
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  3. bisco

    bisco cookie crumbler

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  4. hummusdude

    hummusdude New Member

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    That's my assumption as well. Thanks for your 2 cents!
     
  5. Grit

    Grit Senior Member

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    Thought you have about 45 secs before EV kicks out and cannot drive no farther than 1.5 miles without ICE before auto regen kicks in.
     
  6. Grit

    Grit Senior Member

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    This is abnormal.
     
  7. fotomoto

    fotomoto Senior Member

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    Might have to something to do with this:

     
  8. hummusdude

    hummusdude New Member

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    Thanks Grit but not quite sure what you mean.
     
  9. hummusdude

    hummusdude New Member

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    Are you saying it's abnormal for the ICE to run a few minutes when first started? My 2012 V has always done that so I figured it was normal...to warm up the ICE.
     
  10. Grit

    Grit Senior Member

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    My hv bat gets driven down to 40 to 41% SOC every night and cold soak start up, ICE is not on more than 3 minutes during winters.
     
  11. fotomoto

    fotomoto Senior Member

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    OP might have a 10 minute leg every morning before the first stop/opportunity for ICE shutdown.
     
  12. hummusdude

    hummusdude New Member

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    Sorry...OP?
     
  13. davecook89t

    davecook89t Senior Member

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    OP = Original Poster
     
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  14. Threej

    Threej Member

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    Is this winter on Venus? Sure, I can get in the engine to shut off *at a complete stop* after 3 minutes. But shut off at 30 mph? That takes 10 minutes (maybe faster if I had to grind it up a hill or accelerate to freeway speed first) .
     
  15. B. Roberts

    B. Roberts Hypah Milah! Ayuh.

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    "Geography" meaning slight downhill to get some brake regen during the last few miles? Extends EV capability?
     
  16. hummusdude

    hummusdude New Member

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    More like mostly flat and 30 mph zones or less.