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Charge Timer cuts charge short

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by uropip, Aug 17, 2013.

  1. uropip

    uropip Member

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    I have noticed that when using the "END TIMER" my full charge range seems to be slightly shorter than if i just plug it in and let go til its done on its own.

    Upto .8 miles difference.. which I know isn't huge by any means but it can make a difference..

    Also.. Seems my first few charges were consistantly giving me in the 13.x's mile range and now I am only in the 12.x's.. (1 month in)

    Just curious if anyone else has noticed this too..
     
    #1 uropip, Aug 17, 2013
  2. jnet

    jnet Member

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    It appears that the system is inaccurately estimating the SOC of the battery when it begins the charging process. BTW, is there a reason why you would want to use the END Timer during warm weather? I thought this feature is mainly used during cold weather.
     
    #2 jnet, Aug 17, 2013
  3. uropip

    uropip Member

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    was experimenting with different settings
    I set it to be done like 10 minutes before I plan to leave in the AM so I " wouldn't lose any charge overnight"

    gonna try setting it to start like 3.5 hours before I leave and see what it does.
     
    #3 uropip, Aug 17, 2013
  4. jnet

    jnet Member

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    With Lithium battery, your lost in charge is very little overnight. During winter months, you do want to use END timer so that your battery is warm when you leave in the morning.
     
    #4 jnet, Aug 17, 2013
  5. usbseawolf2000

    usbseawolf2000 HSD PhD

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    You can't go by the estimated EV range. It is based on how you drove prior to charging.

    A better way is to look at the battery state of charge. Full is usually 85.1%.

    You need an OBDII reader with CAN support to see SOC.
     
    #5 usbseawolf2000, Aug 17, 2013
  6. uropip

    uropip Member

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    OH I know that the ev range is just something to show me cause I almost always go more than it shows of if i am aggressive with the pedal its less. So I know that's not a guaranteed #
     
    #6 uropip, Aug 17, 2013
  7. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Even though it only sits at 80%, it's still not as good on the battery to let it sit there "full" when it doesn't need to.
     
    #7 markabele, Aug 19, 2013
  8. jnet

    jnet Member

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    Interesting. I thought lithium batteries were designed to be always full or near full. All of our electronics devices such as smart phones and iPods use lithium and I bet most people keep their batteries charged everyday especially the smart phones.
     
    #8 jnet, Aug 19, 2013
  9. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Ya, but those batteries are so cheap people don't care that it limits their life.
     
    #9 markabele, Aug 19, 2013
  10. CharlesH

    CharlesH CA HOV Decal #5 on former PiP

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    And besides, you are supposed to replace your smartphone every year or so, so why even bother with a replaceable battery (q.v. iPhone)? :rolleyes:
     
    #10 CharlesH, Aug 19, 2013
  11. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    That's actually one of many reasons I prefer Android over iPhone...because you can remove and exchange batteries.
     
    #11 markabele, Aug 19, 2013
    DadofHedgehog and jnet like this.
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