LMF
Posts: 1
Joined: Tue Jan 09, 2018 1:46 pm

Battery recall

Tue Jan 09, 2018 1:55 pm

My Bolt was manufactured in the timeframe where the known issue with the faulty batteries was created, November 2016. I have been reading on other groups that people are driving along with a 100+ miles range and the car just dies in the middle of the road. How is this not a mandatory recall? People can be seriously injured or be killed in a car accident. How do you know if your car is faulty, just want for it to conk out?

elpwr
Posts: 92
Joined: Fri Jan 15, 2016 1:38 am

Re: Battery recall

Tue Jan 09, 2018 2:28 pm

GM monitors the condition of the battery cells and if they fall out of specification it triggers an in-car alert to you that is followed up with an email alert. This isn’t 100% fool proof but it is a good proactive approach.

And remember, there are lots of failure modes in ICE cars that can render them “dead in the middle of the road” without warning, too.

JorgeBarrera
Posts: 2
Joined: Tue Jan 23, 2018 9:49 pm

Re: Battery recall

Tue Jan 23, 2018 10:03 pm

My battery didn't suddenly just died but when it reached thirty percent of remaining charge and the display showed sixty five mikes left, the car went into power save mode, which meant I couldn't go past forty miles per hour. After only driving for another ten miles or so on level ground, the battery was empty and the car died. The total mileage I was able to reach on that full charge was one hundred seventy five miles even though I always drive on L mode, and without using the heater or AC. The mileage on my car at the time of the incident was seventeen hundred miles. Brand new. Has anybody heard of faulty batteries?

SeanNelson
Posts: 1460
Joined: Tue Jul 05, 2016 2:43 am
Location: Vancouver, BC

Re: Battery recall

Wed Jan 24, 2018 8:55 am

I've heard that the car's ability to estimate the state of battery charge may deteriorate if you don't let it complete its charge from time to time. So if you've been doing a lot of unplugging and driving before you get the "charge complete" message (in either "full" or "hilltop reserve" mode) then it might possibly result in this kind of behaviour.

If I understand the issue correctly, the next full charge should recalibrate the software and return range estimates to their original accuracy.

SparkE
Moderator
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Joined: Sun Sep 11, 2016 5:53 am
Location: SF Bay Area

Re: Battery recall

Thu Jan 25, 2018 12:49 am

SeanNelson wrote:I've heard that the car's ability to estimate the state of battery charge may deteriorate if you don't let it complete its charge from time to time. So if you've been doing a lot of unplugging and driving before you get the "charge complete" message (in either "full" or "hilltop reserve" mode) then it might possibly result in this kind of behaviour.

If I understand the issue correctly, the next full charge should recalibrate the software and return range estimates to their original accuracy.


Yes, but the estimate shouldn't result in a 'guestimate' difference of 60+ miles!

SeanNelson
Posts: 1460
Joined: Tue Jul 05, 2016 2:43 am
Location: Vancouver, BC

Re: Battery recall

Thu Jan 25, 2018 2:58 am

SparkE wrote:
SeanNelson wrote:I've heard that the car's ability to estimate the state of battery charge may deteriorate if you don't let it complete its charge from time to time...

Yes, but the estimate shouldn't result in a 'guestimate' difference of 60+ miles!

I would imagine that it depends on how long it's been since the car was able to calibrate its range estimate from a full charge. But it's just speculation at this point.

JorgeBarrera
Posts: 2
Joined: Tue Jan 23, 2018 9:49 pm

Re: Battery recall

Fri Jan 26, 2018 8:32 pm

I usually charge the battery until I get the notification that the battery is fully charged; but I will be more aware of this from now on. I will probably do another try to see how many miles I can get on the full battery next week. I'll make sure that the battery is fully charged before then. Will keep you posted my results.

SeanNelson
Posts: 1460
Joined: Tue Jul 05, 2016 2:43 am
Location: Vancouver, BC

Re: Battery recall

Sat Jan 27, 2018 5:03 am

JorgeBarrera wrote:I usually charge the battery until I get the notification that the battery is fully charged...

If that's the case then I wouldn't think you'd fall victim to that potential issue. And it is just a potential issue - I think it was a theory I read in some other thread but I don't think anyone has ever confirmed it.

gpsman
Posts: 506
Joined: Thu Oct 20, 2016 9:10 pm

Re: Battery recall

Fri Mar 16, 2018 12:48 am

Apparently there is a battery pack recall. And this explains the behavior people here have seen. I just got wind of this when my car “sent GM a trouble code over the air” and Chevy Corporate called me to schedule an appointment asap at the dealer of my choice.

“May exceed a threshold” is code for “your car may stop unexpectedly.”

My car is driving fine by the way.

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gpsman
Posts: 506
Joined: Thu Oct 20, 2016 9:10 pm

Re: Battery recall

Fri Mar 16, 2018 6:37 pm

Talked to the recall advisor today. I asked if my car specifically sent out a trouble code, or if she was calling because my car was included in a block of affected VIN’s. She said my car specifically sent out an error code to them.

She made me an appt. at my local dealer in 7 days, which was the soonest opening. She said if I must continute to drive the car, that’s fine, but she said to keep the car above 30% charged. She stated exactly what is said in this thread. Below 30% the range gauge may be inaccurate and the car may run out of power sooner than expected.

Sounds like if one cell, or bank gets lower voltage than the rest by a certain “threshold” the car shuts down.

They also said while they will do a diagnostics first, they expect to change the battery. I don’t know if that means a complete change, one package, one bank, or one cell. A new battery is being “reserved” under my name and VIN for 14 days at the nearest dealer.

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