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6 mile (10 km) Lithium Ion battery in Non-Plug-in?

Discussion in 'Gen 4 Prius Main Forum' started by iplug, Sep 21, 2015.

  1. iplug

    iplug Senior Member

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    All credit to civicdriver06.

    Thought we should start a new thread on this.

    He linked a video of Toyota telling us:

    "a lithium ion battery ensures pure electric range* at about 10 km".
    (I only know enough German to be dangerous, so please correct any errors in interpretation.)



    Starts at 1:20

    *Edited: originally I used the wrong word "thereafter" instead of "range"
     
    #1 iplug, Sep 21, 2015
    Last edited: Sep 21, 2015
  2. bisco

    bisco cookie crumbler

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    what do they mean, 'thereafter'?
     
  3. Sergiospl

    Sergiospl Senior Member

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    Without an outside plug, you'll use gas or regen to charge it, right?

    Many times I drive around with a full battery and wished it had more capacity.
     
  4. iplug

    iplug Senior Member

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    Any Germans here? civicdriver06, can you clarify?

    He's talking about the horse power and fuel efficiency of the ICE right before. There is no mention of waiting for it to be charged from the ICE, so not sure if I am misinterpreting something.

    It's very clear, however that he mentions a lithium ion battery getting 10 km of pure EV. He uses a term than maybe I am confusing and may mean "pure electric range" instead of "pure electric thereafter".
     
  5. bisco

    bisco cookie crumbler

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    can't really understand it based on the first 3 gen's. maybe the engineers had some kind of breakthrough.

    i could see slightly more capacity being useful, but not on the epa test as part of the increased mpg's.

    it might help some people, buy i have never seen my battery full often enough to make it worthwhile.
    certainly not 6 miles. i don't see how the car could recharge the battery the much and that often. but who knows? maybe that's why they are being so cagey.
     
  6. civicdriver06

    civicdriver06 Active Member

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    Well they said that new Prius would challenge everything we know about hybrids!
     
  7. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    I would be surprised if a Prius designed to charge NiMH technology was correctly programmed to charge LIon. They have very different needs.
     
  8. iplug

    iplug Senior Member

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    Help us out with the translation. Is he saying "pure electric thereafter" or "pure electric range" or did I totally mistranslate?
     
  9. Sergiospl

    Sergiospl Senior Member

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  10. bisco

    bisco cookie crumbler

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    not sure what you mean here, isn't the gen IV going to have li-on option?
     
  11. David Beale

    David Beale Senior Member

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    It appears from the "reveal" that there are two options for the "traction battery". If I were designing it, I would put some kind of "switch" in the inverter/charger so only one part would work with both options, but it may be better to have -two different- inverters.
    We haven't seen yet how they are going to equip each option package. We have seen that some cars will have no spare, with just foam energy absorbent pieces in place of the spare.
    It seems to me that video indicates that the lithium battery will have perhaps twice the capacity of the NiMH one. Lithium batteries do charge more efficiently, so the old "50% loss" calculation probably doesn't apply. Perhaps it will be a "30% loss" when using the battery in "EV" mode. Just a guess, of course. Also, it may be the lithium battery won't get as hot under use, as that is a major limiting factor with the current Prius.

    I question how useful it will be, having to use fuel to recharge the battery, but I'm sure some of you will find it useful.

    Something it keep in mind however, re charging. I had to buy a new battery for my "Roomba". It uses a 3 A-Hr 12 cell NiMH battery. I got one, but while searching also found a lithium one that is supposedly "drop in". It may be that the lithium works just fine with a NiMH charger. o_O
     
  12. iplug

    iplug Senior Member

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  13. bisco

    bisco cookie crumbler

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    still not sure what that means, after warm up?
     
  14. wjtracy

    wjtracy Senior Member

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    I couldn't get it. I heard aluminum and carbon (fiber) presumably weight reduction ideas.

    The red prius was looking pretty to me except the ninja wheels/hub caps.
     
  15. iplug

    iplug Senior Member

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    We are left hanging, no further battery/electric details mentioned other than this short statement.
     
  16. cyclopathic

    cyclopathic Senior Member

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    I suppose you've never driven in mountains.

    Increased capacity could also mean higher battery voltage, and as a result higher recovery rate if the current kept the same. The direct implications of this would be that what now is used by friction brakes would be recoverable, and higher draw could allow more powerful electric motors and further reduction and optimization of ICE.
     
  17. Trollbait

    Trollbait It's a D&D thing

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    Remember, 6 miles of EV range is approaching the Prius PHV's, and it has a 4.4kWh Li-ion pack that takes up the under floor space in the rear.

    Li-ion with larger capacity can increase the amount recovered from braking, and deliver more power for acceleration, but even if it can go 6 miles on EV, that will be inefficient. At the end of pushing the EV button and driving those 6 miles, all the energy to replenish the pack will come from the ICE and gasoline.
     
  18. cyclopathic

    cyclopathic Senior Member

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    It really depends on what they do with it, and if what they've done will have any impact on EPA numbers.

    As an example I have ~1.5mi stroll through neighborhood, which improves MPG reading on the way home. If EV was available I could have avoided needlessly running ICE until reaching open highway. Total improvement of MPG would have been worth 1-2 MPG.
     
  19. Tideland Prius

    Tideland Prius Moderator of the North
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    It would be nice but it seems unnecessary for a normal hybrid. 6 miles might end up being 3-4 miles with EPA testing.
     
  20. iplug

    iplug Senior Member

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    The German Toyota website lists the Gen 1 Prius as 25 km (15.5 miles) of EV range. Over in the U.S. we get an EPA rated 11 miles.

    Using that conversion, if accurate, one would predict 4.5 miles EV range with EPA for the Gen 4 liftback.

    Li-Ion has both a higher gravimetric density (Whr/kg) and volumetric density (Whr/L) than NiMH. Therefore it is possible for the new Gen 4, presumed 4.5 mile range hybrid battery to have similar weight as the old Gen 3 NiMH one.

    No reason they wouldn't be able to hide the battery in a similar place and not need more room like the Plug-in version.
     
    #20 iplug, Sep 21, 2015
    Last edited: Sep 21, 2015