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Posted: Thu Jul 08, 2021 7:19 pm
Posted: Thu Jul 08, 2021 9:49 pm
Yes, I hope we find out some details. But it also seems to be another case of someone discharging pretty low fairly often. So that could be a trigger also.
But the main point would still be that the final software update was unaware of a cell problem and didn't warn the owner. Then the "alarm" part didn't happen until the event was taking place so that's basically no help at all.
Closely monitoring the again just when I was beginning to feel safe. I hope the house doesn't burn down before we get some real information from GM. I may need to see what my 2017 is worth on the used market, or see what Carmax will give me for it. If the resale value of a Bolt doesn't now drop to $0.
Posted: Thu Jul 15, 2021 6:59 pm
Apologies if this has been discussed already. Might it be possible that the battery temperature sensor module fails in a way that always indicates that the battery is too cold? This would turn the battery heater on, and leave it on no matter how hot the battery got. Could this induce thermal runaway?
Posted: Fri Jul 16, 2021 12:31 pm
DaveInAvl wrote:Apologies if this has been discussed already. Might it be possible that the battery temperature sensor module fails in a way that always indicates that the battery is too cold? This would turn the battery heater on, and leave it on no matter how hot the battery got. Could this induce thermal runaway?
I suppose anything is possible, but in my opinion, the separator in the battery is getting compromised (probably from dendrite growth) which causes a short. Then the energy stored in the battery is "dumped" through that small area which causes a fast temperature rise and leads to a fire.
I'm sure GM is vigorously pursuing a solution but they are hampered because the "evidence" was burned in the fire. My guess is they'll wind up replacing the batteries, like Kona did, or offer a new car with a battery made in the US.
Edit: If the sensor is a thermocouple and fails, it will read a high temp, which should turn on battery cooling.
Posted: Fri Jul 16, 2021 1:04 pm
Posted: Fri Jul 16, 2021 9:00 pm
In view of this latest from GM they should AT LEAST reimburse me for my increased insurance premium now I can no longer garage the vehicle at night.............
"General Motors has been notified of two recent Chevrolet Bolt EV fire incidents in vehicles that were remedied as part of the safety recall announced in November 2020. Out of an abundance of caution, we are asking owners of 2017-2019 Chevrolet Bolt EVs who were part of the recall population to park their vehicles outdoors immediately after charging and not leave their vehicles charging overnight while we investigate these incidents.
Customers who have not had the remedy completed should still visit their dealer for the recall remedy while our investigation continues. At GM, safety is our highest priority, and we are moving as quickly as we can to investigate this issue. Customers should visit https://my.chevrolet.com/recalls
or contact the Chevrolet EV Concierge 1-833-EVCHEVY or their preferred Chevrolet EV dealer."
Posted: Sun Jul 18, 2021 11:32 pm
I'd sure to see a buyback. I can't park farther than about 13 feet from a structure on my property, and the house is right on the street. The nearest EV certified Chevrolet dealer in the US is 260 miles away. Car was bought in North Carolina, then I moved to far northern Maine. Probably a nearby dealer in New Brunswick, but the Canadian border is still closed..
Posted: Sat Jul 24, 2021 11:39 am
Is there a way of finding out if my 2019 Bolt has the battery that is not made by LG Chem? The sticker shows a manufacturing date of 2/2019.
Not sure if that is still in the "bad lot". When I go to the NHTSA site and put in my VIN, it shows 0 recalls.
Posted: Sat Jul 24, 2021 11:56 pm