Rivian Blue
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- Nov 14, 2024
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- Rivian
- R1S Rivian Blue
I have searched the forums and online and have not found anything specifically like the issue I had about a week ago.
While coming down a steep hill (24 degree slope) motors instantly started heating up. In a very short time they went to 270 degrees and kept climbing. Both front motors hit 307 degrees, which is in the red zone. I could hear the motor cooling system ramp up but it didn’t drop the temp. When we got off the hill, the motor temps dropped very quickly. I had the truck in off road, the regen system was controlling the descent well, but that’s what caused the motors to get so hot. The motors were at that temp for around a minute or two, but had the hill been much longer, I don’t think they could have handled it. The hill was only about 100 yards and the outside temperature was about 50 degrees.
Someone suggested it might be possible that the battery was at it's max regen power limit, so I'm wondering if the additional braking current was intentionally being dissipated as heat in the motor.
I don't think Rivian has released enough/any tech info related to motor temps. We do see temps like that during battery preconditioning so we can assume Rivian has designed/engineered for these temperatures.
While coming down a steep hill (24 degree slope) motors instantly started heating up. In a very short time they went to 270 degrees and kept climbing. Both front motors hit 307 degrees, which is in the red zone. I could hear the motor cooling system ramp up but it didn’t drop the temp. When we got off the hill, the motor temps dropped very quickly. I had the truck in off road, the regen system was controlling the descent well, but that’s what caused the motors to get so hot. The motors were at that temp for around a minute or two, but had the hill been much longer, I don’t think they could have handled it. The hill was only about 100 yards and the outside temperature was about 50 degrees.
Someone suggested it might be possible that the battery was at it's max regen power limit, so I'm wondering if the additional braking current was intentionally being dissipated as heat in the motor.
I don't think Rivian has released enough/any tech info related to motor temps. We do see temps like that during battery preconditioning so we can assume Rivian has designed/engineered for these temperatures.
