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US government battery study

Discussion in 'Gen 3 Prius Main Forum' started by Former Member 68813, Mar 26, 2013.

  1. Former Member 68813

    Former Member 68813 Senior Member

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    Sorry, if this was posted before, but didn't see it on a brief search. I came across interesting US government battery studies in two 2010 Prius cars:

    http://avt.inel.gov/pdf/hev/batterygenIIIprius0462.pdf
    http://avt.inel.gov/pdf/hev/batterygenIIIprius6063.pdf

    the conclusions were:

    I thought the results were very good, why did they say "below targets" ?

    Edit: judging from another interesting document, government considers 160,000 miles "end of life" in a car:
    http://avt.inl.gov/pdf/hev/end_of_life_test_1.pdf

    Edit2: After reading this for a second time I noticed the Legend for Fig 7 explained why the battery failed DOE targets. Still not sure why those arbitrary targets.
     
    #1 Former Member 68813, Mar 26, 2013
    fuzzy1 likes this.
  2. drysider

    drysider Active Member

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    Interesting that the battery degradation toward the end of the test did not effect the mileage. There is also a good breakdown of the regen system.
     
    #2 drysider, Mar 26, 2013
  3. TwoUnderPar

    TwoUnderPar Member

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    Thanks for the links.

    From Page 5:
    This indicates that at the time of BOT testing, the Prius battery performance was below DOE targets.

    Yeah, the battery, even when brand new, did not meet the DOE's "maximum power target". I didn't find (or may have missed) where the "target" comes from.
     
    #3 TwoUnderPar, Mar 27, 2013
  4. Former Member 68813

    Former Member 68813 Senior Member

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    #4 Former Member 68813, Mar 27, 2013
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