Regen can sometimes be limited to protect the battery. (For example,
when the battery is fully charged so shouldn't be accepting more charge,
when it is very cold (so shouldn't be charged),etc...
[Also, I believe as the battery ages, at some point (8 capacity bars?)
regen is limited or cut off just because the battery health has gotten
low (total capacity is lower, so they worry about putting as many amps
into the battery....)]
You might be running into a combination of cold and battery capacity
that disables the regen temporarily until the battery temp gets warm
enough to go over whatever threshold is set in the BMS.
[People don't usually notice the cold weather charging limit, because a
lot of the time they charge immediately after driving, which warms up
the battery.... but if you plug in the car when the battery is too cold,
it will (only) run the battery heater until the cells warm up enough to
be charged...]
Jay
On 3/19/23 18:25, Mark Hanson via EV wrote:
Hi Folks
Last year when regen was intermittently dropping out at 26F degrees, I took it
to the stealership who said it was a bad 12V battery they wanted to replace for
$500. I got an Optima at Advance Auto and then this year (surprise ) the
problem is back. I assume they must be turning off the regen when it gets below
26F. Not sure why since the battery tolerates 100s of amps load, going through
other way shouldn’t matter.
Best regards
Mark
Sent from my iPhone
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