Patent ID: 9083065
Filing Date: 2015-07-14
Classification: H01M,Y02E

Abstract:
1. A battery self heating system comprising: a. a self-resonant circuit having a resonant frequency comprising said battery having an impedance inversely proportional to temperature, b. a single energy storage element comprising an inductor having an inductor value for storing an amount of energy from the battery, said inductor connected to said circuit at a positive connection point and a negative connection point by; c. a switch for cyclically transferring said amount of energy to and from the battery at said resonant frequency; d. wherein said amount of energy transferred is determined by said impedance; e. and wherein the resonant frequency is determined by said inductor value and said battery impedance together; f. and wherein an energy loss due to the impedance will be converted to heat within the battery at a rate that is at least ten times higher in the battery than in the inductor.