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Does Bolt EV have a battery buffer like in the Volt?

Posted: Tue Aug 13, 2019 10:29 am
by Vanit
Does Bolt EV have a battery buffer like in the Volt? Gen 1 Volt had a 16.5 kwh battery with roughly 10.5 kwh usable (63.6%) from 0-100%. Any mentions about this in the manual? Any daring Bolt EV owners willing to do a 100% -> 0% run and see if the usage is 60 kwh?

The reason I'm asking is I'm curious whether it's "safe" to charge to 100% and back down to 0% on a regular basis, or even occasionally. I know that Tesla's have irreplaceable damage to the battery if it reaches 0% even once, and costs $40k to replace the pack. Tesla has a software safeguard where it shuts down the car before it reaches this level, so this never happens in reality. Similarly, I've read that leaving the battery pack at 100% for an extended period is also bad, especially in the heat. In the Volts, we don't have to worry about this due to the buffer.

Re: Does Bolt EV have a battery buffer like in the Volt?

Posted: Tue Aug 13, 2019 11:28 am
by GetOffYourGas
I'm sure the Bolt has some kind of buffer, at least at the low end. Any lithium battery will be severely damaged when fully discharged - that's not restricted to Tesla.

That said, I can't imagine it has anywhere near the percentage buffer of a Volt. The Volt's battery system was perhaps the most conservatively designed xEV ever made.

Re: Does Bolt EV have a battery buffer like in the Volt?

Posted: Wed Aug 14, 2019 2:10 pm
by paulgipe
I agree with Brian. There is a long thread either on this forum or the other Bolt forum on this topic.

Jeff Nisewanger, https://electricrevs.com/category/charging/, is very clear on the range of charge to discharge that he recommends. I don't know if he's on this forum or not.

The short answer is what Brian posted. Avoid discharging it too low, don't charge it to 100% more than necessary to drive it as it was intended. Eric Way has discharged his to 1% because he had to--he was headed to a charger too far. Some have taken the Bolt down to turtle in Leaf lingo.

Do a google search on this topic and the thread should show up.

Paul