Self-Heating Battery Battles Cold Weather

Self-heating lithium-ion battery warms itself automatically in cold weather. If the temperature reaches below freezing, the temperature sensor will trigger the current to re-route through the foil, creating resistance heat that will warm the battery’s interior until it reaches a safe level. http://news.psu.edu/story/388410/2016/01/20/research/self-heating-lithium-ion-battery-could-beat-winter-woes/