Bolt battery only 57kWh?

Discussion in 'Bolt EV' started by JyChevyVolt, Feb 10, 2018.

  1. JyChevyVolt

    JyChevyVolt Active Member

    Screenshot_20180210-170052.png

    GM quality, steering wheel fluid leaking on a brand new car. Oh my.
     
    Last edited: Feb 10, 2018
  2. WadeTyhon

    WadeTyhon Well-Known Member

    Only 57 kWh? Interesting! That's smaller than I expected! But since my lifetime average is 4.2 miles / kWh (when it is not below 40 degrees!) I guess that tracks. 239 miles!

    There still could be a few kWh that are inaccessible though. GM has done that on their other EVs and PHEVs so far. But with a pack this large it may be a small portion of the pack.

    Lots of positive comments on the car (and the video) from future and current service techs. That's good to see! Looks like the guy doing the battery removal thinks the battery packs will be simple to replace but are going to have a nice long shelf life.

    Commenter: "Will these cars see multiple owner paid for battery packs in respective their lifetimes, thus making them viable to operate economically well past the normal 150-250K mile service life we see today? "

    Video Poster: "Now that I see how easy it is to swap out the battery, I suspect it would take 2 hours labor for the complete job. I also suspect the batteries will last well beyond 100k miles. The rest of the Powertrain is pretty simple. Not much to go wrong mechanically. "
     
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  3. Tim Miser

    Tim Miser New Member

    Hmmm... Yeah that is interesting about the 57 KWh label on the battery. I wonder what the explanation is for that? Hasn't GM quoted it to be a 60 KWh battery?
     
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  4. God

    God Member

    The MY14 Spark EV had a 21.3KW A123 battery then in MY15 it switched to a LG Chem battery which had a 19 KW battery...With Tesla, they haven't confirmed this, but a well known Tesla tinkerer ran some tests and concluded the 85kWh battery is really 81kWhs of which 77kWh are usable...Not sure what the advertising laws are...
     
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  5. Aladesuru Adewale

    Aladesuru Adewale New Member

    Awesome. Tnks for sharing your thoughts with us. Am concerns is if the battery served it purpose.....?

    Sent from my www.aladesuru-walter-adewale.strikingly.com
     
  6. Domenick

    Domenick Administrator Staff Member

    I wonder how this might impact efficiency measurements?
    Obviously, if they used 60 kWh instead of 57, then it may be more get more km per kWh, no?
     
  7. WadeTyhon

    WadeTyhon Well-Known Member

    Just taking a guess here - perhaps ~60 kWh is the actual pack size but 57 is the usable capacity?
     
  8. Neromanceres

    Neromanceres New Member

    The Bolt EV has been documented having a usable capacity of 60KWh (at least according to the on board displays). If you do a full tear down and pull out the cells and add up the individual cell capacities you get 67KWh as the actual full capacity. I'm not sure where the 57KWh comes from. Now this is apparently version two of the Bolt EV battery. Is it possible that version one was 60KWh and version two 57KWh? It will be interesting to see Weber Auto's future video's when they further tear down the battery pack.
     
    Domenick likes this.
  9. Domenick

    Domenick Administrator Staff Member

    I hadn't heard about a 2nd version of the Bolt battery. Do you have a source for the info, or is this something you've surmised.

    I've subscribed to the Weber channel so hopefully I'll notice it as soon as it's published.
     
  10. Neromanceres

    Neromanceres New Member

    The Bolt EV service manual references two versions of the battery. The WeberAuto video even mentions this. They state based on the construction of the coolant tube connections that this is a version 2 of the battery. Though version 2 could be simply a series of small revisions or it could be something more major. A new tear down video has been posted. But I haven't had the time to watch it in detail yet.

     
    Domenick likes this.
  11. Domenick

    Domenick Administrator Staff Member

    This video just came out this morning, and I've watched the first 20 minutes. Not sure if the capacity of the pack changed over the two versions, but hopefully we'll find out. Need to see if someone's reported having a version one, and maybe checked out the label.
     
  12. Neromanceres

    Neromanceres New Member

    I just watched the video. He doesn't break down to the cell level. But there are 8 modules marked 5.94KWh and 2 modules marked 4.75KWh which does add up to 57KWh.

    What's interesting is that 57KWh number doesn't make sense. Below is a video of the Ampera-e on a full charge run and the display clearly shows more than 57KWh being used. And 100% of the battery would not be usable.

     
  13. JyChevyVolt

    JyChevyVolt Active Member

    The version that Bjorn tested was 1st Gen battery.

    GM probably eliminated the top buffer after all the data collected on version one. 3kWh is about $700 dollars. That a huge savings in the automotive world.
     
  14. Domenick

    Domenick Administrator Staff Member

    Video of Bjorn testing the Bolt/Ampera for context. I haven't had the chance to watch it yet, but I hear it's a great overall review of the car.



    *Edit: Actually the Bjorn video for context seems to be the short one above, while this is another long drive of the car, but in Korea instead of Scandinavia. Oops?
     
    Last edited: Feb 20, 2018

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