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From Electrek: GM warns of potential battery degradation of up to 40% for Chevy Bolt EV...

Discussion in 'News from Electrek.co' started by RSSFeed, Dec 7, 2016.

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  1. RSSFeed

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    GM warns of potential battery degradation of up to 40% for Chevy Bolt EV during warranty period or 100,000 miles

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    Battery capacity degradation is to be expected with any battery-powered electric vehicle. The questions are how much degradation, how fast, and what is covered under the warranty. GM released the owner’s manual for the Chevy Bolt EV this week and in it, the automaker warns of potential battery degradation of up to 40% during the 8-year warranty period or within 100,000 miles. more…

    Filed under: Uncategorized [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG][​IMG]

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  2. Tom Bodera

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    Holy cow. What a disappointment. So the leaf issues all over again. Good thing they will only make 30k a year then.

    You think a caviat like that would be in the contract and well known in advance.

    As an example my solar panels have a 20y 80% guarantee. Not apples to apples I know but come on.
     
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  3. Jayc

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    Hmm did I misread or Tesla has no clearly defined warranty cover at all on battery for normal degradation yet people are complaining about GM saying they will only cover if it lost more than 40% capacity.
     
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  4. Tom Bodera

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  5. garsh

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    Man, I wish Nissan would do that. I'm already down to about 2/3 of my original capacity.
     
  6. TrevP

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    Folks, let's not pile up on GM just yet. Battery degradation is a real thing but I think in this case they're CYA (covering their asses) in the manual because of the lawsuits that will surely happen when people experience *some* range loss over time.

    We have plenty of experience and evidence about Tesla's cells and how they age (extremely well) but this is the first time that this many LG Chem prismatic cells have been used in a battery this size so we really don't know yet how much degradation will occur.
     
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  7. Tom Bodera

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    I agree the Trevor but the issue is setting precedence. CYA is one thing. I am afraid of them setting a mentality that a 40% product degradation is acceptable with warranty when there is evidence to the contrary from the competition.

    Maybe I came off to hard on my first response. Must be my time of the month.
     
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  8. MichelT3

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    It's also putting the ax to the young sapling of trust in EV's by the general public. Who's doubts are constantly being reconfirmed by the fossil ICE-producers.
    It would be much better if companies who put EV's on the market would say (like Tesla is doing in a way): "Don't worry, if degradation is excessive, we will solve your problem."
     
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  9. Michael Russo

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    Concern about T≡SLA batteries degradation? How about this one: Roadster, 5 years old, 75k miles, 101% retention! :D

     
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  10. MichelT3

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    Which is another reason why the GM prediction is such an insult and blow to the BEV-sector.
     
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  11. Dan Detweiler

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    I think this probably represents the difference between the GM cells and the Tesla cells. It would be interesting to see a comparison of degradation between the two design choices.

    Dan
     
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  12. MichelT3

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    That's very well possible @Dan Detweiler
    My point: such an inferior solution undermines the trust people will have in BEV, slowing down the essential transition towards renewable energy consumption. Strengthening thoughts that old car manufacturers really are trying to postpone this transition.
     
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  13. garsh

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    Keep in mind, Tesla takes some chances with its battery pack design. In particular, we've all seen that they can undergo uncontrolled thermal reactions when damaged. The fires that have occurred start slowly enough that conscious occupants can safely escape before it gets bad, so I'm not too concerned.

    Now, compare that to the Nissan Leaf.

    I don't believe that there have been *any* cases of a Leaf's battery pack contributing to a fire in any way. I tried searching. The only fire-destroyed Leaf I found appeared to actually have it's battery pack intact, which is kind of amazing.

    I assume that Nissan was really, really worried about how EVs would appear to the public if it were possible for the battery pack to erupt into flames. So they chose the safest cell chemistry available. It's inferior to Tesla's choice when it comes to degradation, but definitely superior for safety.
     
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  14. MichelT3

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    How many fires with non-accidented Tesla cars have occurred? Do we know? In # and %?
     
  15. garsh

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    I only remember the one, during a test drive in France IIRC.
     
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  16. MichelT3

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  17. BigBri

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    Seems like covering their butt for sure but who knows. Will be interesting to see once they've got a lot of real world miles on them. This might be one thing that would kill my interest in one (if I wanted one). If the average car decays 5% but the one I theoretically had decays 35% GM would just say it's within their parameters despite being a huge outlier.
     
  18. garsh

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  19. MichelT3

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    Ah! Thanks!
    So also one while charging in Norway. And I saw an article about one in the US on a streetcorner IIRC ;).
    Do we know if it were all three early cars / if Tesla found out the reasons?
    Not that I'm worried, just to know.
     
  20. BigBri

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    The one in France I believe ended up being an electrical connection that wasn't robot done but human done so it wasn't quite right.
     
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