The increase in density and power of EV batteries goes along with higher heat generation, which has become significant during high-power charge or discharge events. At the same time, EV batteries last the longest when they are operated within a narrow temperature range of between 20 and 30 °C.

FAHRENHEIT developed a technology to maintain this temperature range during operation and fast charging. In a mechanically stable and very dense form factor, our technology uses the temperature differential between the battery and the car’s heat pump for cooling and even pre-warming the battery, without tapping into the battery’s precious electrical energy.

In addition, the technology allows very homogenous cooling and warming of the battery, reducing the risk of temperature gradients within the cells. It even saves weight compared to existing water cooled solutions. Finally, our a system is safer than liquid cooled solutions as it operates with water vapor—which is non-conductive, non-toxic and non-flammable—under a vacuum, making leaks to the outside and in particular to the electrodes highly unlikely.