Hybrid battery temperature and fan speed (Hybrid Assistant)

excellent

 

I feel your pain, because I cannot enjoy my car because of this. The place where I live has many ups and downs and the weather is very hot, so the battery temp flies to 45C after 3-4 hard braking or after driving downhill. There's nothing I can do except to turn the fan to the highest and leave it like that (Dr. Prius app). The software for the cooling system is crap. It should spin the fan faster and start to spin it sooner. I don't know what is the science behind this.
I would pay a lot of money just to be able to change the fan settings: 1 speed when the temp is 27, 2 speed when the temp is 29, 3 speed when the temp is 33, 4 speed when the temp is 37...
Leaving the fan to keep the battery around 38 (with Dr. Prius) helps and the car ban be driven without going to semi limp mode.

 

If the battery is good it won't overheat with programmed fan speeds.