Battery heating circuit

摘要

The present invention provides a battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, a freewheeling circuit (20), and an energy superposition unit, the energy storage circuit is designed to connect with the battery to form a loop, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, the switch unit (1), the current storage element L1, and the charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy superposition unit is connected with the energy storage circuit, and is designed to superpose the energy in the energy storage circuit with the energy in the battery when the switch unit (1) switches on and then switches off; the freewheeling circuit (20) is designed to form a serial loop with the battery and the current storage element L1 to sustain current flow in the battery after the switch unit (1) switches on and then switches off.