| 摘要 |
Certain embodiments of the present invention provide a battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping component R1, an energy storage circuit, and a freewheeling circuit (20), wherein: the energy storage circuit is connected with the battery, and comprises a current storage component L1 and a charge storage component C1; the damping component R1, switch unit (1), current storage component L1, and charge storage component C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is configured to control ON/OFF of the switch unit (1), so that the energy can flow back-and-forth between the battery and the energy storage circuit when the switch unit (1) switches on, and amplitude of the current flowing from the energy storage circuit to the battery can be controlled; the freewheeling circuit (20) is configured to sustain the current flowing to the battery when there is current flowing from the energy storage circuit to the battery and after the switch unit (1) switches off. For example, the battery heating circuit provided in certain embodiments of the present invention can avoid the safety problem caused by over-current in the heating circuit, so as to protect the battery efficiently.
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