TEC battery water heater/cooler
Posted: Fri Aug 09, 2019 7:14 pm
Made a new topic on the TEC battery heater/cooler. Because it may not be very interesting or a little off topic.
Have used this for a few years now.
Did actually expect it to fail, but no, it works!
I first ran it directly on HV turning it ON/OFF with a SSR, but it gave to much stress on the peltier elements. They don't like PWM either.
So I went for a adjustable 250VDC PSU, this way it can be run directly on AC when plugged in, and from battery pack when unplugged.
The power is rather small 1.5kW pluss the peltier added "free" energy.
There are two water loops, one for the battery and the other is using the original cooling loop for motor, inverter DC/DC and Tesla charger.
Had it for two winters now, and It keeps the battery warm from day to day with very little power.
This is first test setup:
Have used this for a few years now.
Did actually expect it to fail, but no, it works!
I first ran it directly on HV turning it ON/OFF with a SSR, but it gave to much stress on the peltier elements. They don't like PWM either.
So I went for a adjustable 250VDC PSU, this way it can be run directly on AC when plugged in, and from battery pack when unplugged.
The power is rather small 1.5kW pluss the peltier added "free" energy.
There are two water loops, one for the battery and the other is using the original cooling loop for motor, inverter DC/DC and Tesla charger.
Had it for two winters now, and It keeps the battery warm from day to day with very little power.
This is first test setup: