Battery temp and "Regenerative braking reduced" warning

[ColonelBadger]

What temperature does the battery need to be to get "Regenerative braking reduced" when starting the car?

This morning I got in to go to work and put it in reverse only to be told Regen was reduced. The car was charged to 80% so it wasn't that. My only assumption was because the battery was cold, but it hadn't been that cold here; it had got to 27F outside the previous night but the car was in the garage. I wasn't expecting to see that until much colder.

 

[segbrk]

50-60F seems to be low enough for a slight reduction in regen.

 

[suchluke]

It's the combination of both State of Charge and outside temp. For example you may get a warning at 80% SOC and 50F outside. You may also get full regen when its 80% SOC and 75F+ outside. Also when it's below 50F and SOC is below 50% you may also get full regen. I don't know exact thresholds but hopefully you get the idea. This is all done to protect the battery health.

 

[ColonelBadger]

It's the combination of both State of Charge and outside temp. For example you may get a warning at 80% SOC and 50F outside. You may also get full regen when its 80% SOC and 75F+ outside. Also when it's below 50F and SOC is below 50% you may also get full regen. I don't know exact thresholds but hopefully you get the idea. This is all done to protect the battery health.

So bottom line its normal and everyone is seeing it as temperature drops. I guess I wasn't expecting it until way lower temps, but I'm new to EVs .

 

[suchluke]

Yes, completely normal. I am located in PA and observed similar warning when the temp dropped to 45F. Once I started driving and the state of charge reduced and battery temp increased the regen also increased. There is an indicator now around the speedometer when the regen is reduced it will be shown with the dashed line.

 

[mraschko]

So, I had the reduced braking warning come on as I was backing out of the garage this morning. Car was at 80% charge and said 56F. Now I haven't paid much attention to the garage temp leading up to this, but I'm pretty sure it's been similar lately and I haven't gotten the warning those other morning. I didn't notice any reduction in the regenerative braking either.