Hello out there,
I'm working on a mobile device which is to be used under cold weather conditions. For convenience I'm using LiPo batteries to power this device. However, LiPo batteries discharge much faster below 12-10 degree celcius. Since I expect temperatures down to -20 degree and the device not producing enough heat itself, I'd like to heat the batteries while in use.
I wonder if someone attempted something similar already and has some experience with heating LiPo battery packs and has some pointers as what to take care of.
I'd like to have used an ATMega406, as it has cell balancing FETs, I2C and PWM outputs for heating, unfortunately it's not working below 0 degree C. So I think a Max6680 for temperature control and a Max2775 for battery protection along with a small ATtiny for heater control might be a way to go.
What would you think?
I'm working on a mobile device which is to be used under cold weather conditions. For convenience I'm using LiPo batteries to power this device. However, LiPo batteries discharge much faster below 12-10 degree celcius. Since I expect temperatures down to -20 degree and the device not producing enough heat itself, I'd like to heat the batteries while in use.
I wonder if someone attempted something similar already and has some experience with heating LiPo battery packs and has some pointers as what to take care of.
I'd like to have used an ATMega406, as it has cell balancing FETs, I2C and PWM outputs for heating, unfortunately it's not working below 0 degree C. So I think a Max6680 for temperature control and a Max2775 for battery protection along with a small ATtiny for heater control might be a way to go.
What would you think?