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GM tells some Bolt owners to park 50 feet away from other cars

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Re: GM tells some Bolt owners to park 50 feet away from other cars

#111
post #27

Earlier quoted context omitted.

Price and panel gaps

My Model Y, delivered within the last few weeks, has no panel gaps (edit: the panel gaps, measured with an $8 tool at delivery, are within spec). It was delivered in perfect condition and is garage safe. I can even park next to other cars safely.

Your car has panel gaps, it's just a question of whether they're within spec. Most people who aren't either in the automotive industry or really big car buffs won't notice until it gets really bad.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#112
post #59
post #4

> The automaker told Bolt owners to limit the charge to 90 percent, plug in more frequently and avoid depleting the battery to below about 70 miles of remaining range. Tesla's approach here would be to issue an OTA update that told your car to treat 90% as 100% and 25% as 0. I can't decide if I like that better or worse.

To be fair this is the norm for pretty much any rechargeable electronic device. Lithium chemistries in particular are sensitive to damage from over discharging. "5% battery remaining on the display" is pretty much never "5% of available energy available"

Yes, but raw cells basically stop being rechargeable when you discharge them past a certain cell voltage. They either won’t recharge or are rather likely to burn when you do.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#113
post #4

> The automaker told Bolt owners to limit the charge to 90 percent, plug in more frequently and avoid depleting the battery to below about 70 miles of remaining range. Tesla's approach here would be to issue an OTA update that told your car to treat 90% as 100% and 25% as 0. I can't decide if I like that better or worse.

As a Bolt owner and advocate for right-to-repair/etc - I'd prefer the OTA option for sure.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#114
post #44

My understanding is that GM will replace the battery within 3 years, right? Seems like a good time to buy a cheap electric car at a discount from someone who is (understandably) impatient.

Correct, they're planning on replacing them but it will take a while to build the batteries and do all the swaps.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#115
post #15

The Chevy volt model as established in the early 2010s is an arm and a leg beyond the next closest competitor in the electric automobile space and this is a smirch upon its namespace

While I don't agree with your statement, I do think the Volt platform was the best Hybrid platform and GM should have scaled it up for their Trucks and SUVs.

The instant torque provided by the electric motor and the ability to switch to just EV mode and run silent would have been killer for ORV enthusiasts and hunters.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#116
post #4

> The automaker told Bolt owners to limit the charge to 90 percent, plug in more frequently and avoid depleting the battery to below about 70 miles of remaining range. Tesla's approach here would be to issue an OTA update that told your car to treat 90% as 100% and 25% as 0. I can't decide if I like that better or worse.

I think practicality is governing each company’s choice; there’s no way GM is capable of pushing an OTA update to change all those cars’ firmware. If they could push an update over cellular, I would bet you GM would do it in a heartbeat.

They could easily achieve the same 90% == 100% charging result with “myChevrolet” (onstar).

Car sends status update that charge has hit >=90%: stop charge command issued server side. Last I checked, the car sends a vehicle status update every percentage tick on charging so this wouldn’t be perfect but it’d be better than nothing.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#117
post #99

Earlier quoted context omitted.

How many of those are with the car off and at rest ?

Is that actually relevant though, or just an implementation detail? Perhaps you could argue a moving car seems more potentially hazardous? But then that's only learned from extant behaviour anyway?

A car being driven is guaranteed to have a person behind the wheel. (For now...) A electric car in an attached garage spontaneously bursting into flame at 2 am is a recipe for burning a house to the ground.

Re: GM tells some Bolt owners to park 50 feet away from other cars

#118
post #99

Earlier quoted context omitted.

How many of those are with the car off and at rest ?

Is that actually relevant though, or just an implementation detail? Perhaps you could argue a moving car seems more potentially hazardous? But then that's only learned from extant behaviour anyway?

[deleted]

Re: GM tells some Bolt owners to park 50 feet away from other cars

#119
post #111

Earlier quoted context omitted.

My Model Y, delivered within the last few weeks, has no panel gaps (edit: the panel gaps, measured with an $8 tool at delivery, are within spec). It was delivered in perfect condition and is garage safe. I can even park next to other cars safely.

Your car has panel gaps, it's just a question of whether they're within spec. Most people who aren't either in the automotive industry or really big car buffs won't notice until it gets really bad.

[deleted]

Re: GM tells some Bolt owners to park 50 feet away from other cars

#120
post #55

Earlier quoted context omitted.

I don't see how electric cars are any different than mobile phones. So basically this means a 3 year life span in terms of battery performance. Regular combustion cars though also suffer reduced mpg so I am not saying this is an apples to apples comparison.

While nobody will come out and say it, I’m convinced based on some extensive early career battery system engineering and various evidence from tesla that what they do is put in much more raw capacity than they sell you and then limit with software the capacity of the battery. Early in the life of the battery this leads to slowed degredation and as the battery agrees the software uses more and more of the raw capacity…

I mean, you don't have to guess. There are plenty of battery teardown videos where they count the cells. IIRC it's on the order of 5-10% kWh reserved.
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