US 12,227,109 B2
Power battery heating system and control method and control circuit thereof
Xiaojian Huang, Ningde (CN); Zhimin Dan, Ningde (CN); Xianxi Pan, Ningde (CN); and Jinfeng Gao, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 27, 2021, as Appl. No. 17/562,562.
Application 17/562,562 is a continuation of application No. PCT/CN2021/110706, filed on Aug. 5, 2021.
Prior Publication US 2023/0037865 A1, Feb. 9, 2023
Int. Cl. B60L 58/27 (2019.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 10/615 (2014.01); H01M 10/625 (2014.01); H02J 7/00 (2006.01); H02P 27/06 (2006.01); B60L 50/60 (2019.01)
CPC B60L 58/27 (2019.02) [H01M 10/425 (2013.01); H01M 10/441 (2013.01); H01M 10/443 (2013.01); H01M 10/615 (2015.04); H01M 10/625 (2015.04); H02J 7/007192 (2020.01); H02P 27/06 (2013.01); B60L 50/60 (2019.02); B60L 2240/42 (2013.01); B60L 2240/545 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01); H02J 2207/20 (2020.01)] 17 Claims
OG exemplary drawing
 
1. A control method of a power battery heating system, wherein:
the power battery heating system comprises a first motor, at least one inductor, a switch module, and a power supply module,
wherein the switch module comprises a first bridge arm group and a second bridge arm group, each bridge arm of the first bridge arm group and the second bridge arm group comprises an upper bridge arm and a lower bridge arm, connection points of the upper bridge arm and the lower bridge arm of each bridge arm of the first bridge arm group are connected to all windings of the first motor in a one-to-one correspondence, connection points of the upper bridge arm and the lower bridge arm of each bridge arm of the second bridge arm group are connected to the at least one inductor in a one-to-one correspondence, and the first bridge arm group and the second bridge arm group are both connected in parallel to the power supply module; and
the control method comprises:
sending a first heating signal to the switch module, wherein the first heating signal is configured to control all the upper bridge arms of the first bridge arm group to be turned on, all the lower bridge arms of the first bridge arm group to be turned off, all the lower bridge arms of the second bridge arm group to be turned on and all the upper bridge arms of the second bridge arm group to be turned off, so as to form a first loop between all the upper bridge arms of the first bridge arm group, all the windings of the first motor, the at least one inductor, all the lower bridge arms of the second bridge arm group and the power supply module; and
sending a second heating signal to the switch module, wherein the second heating signal is configured to control all the lower bridge arms of the first bridge arm group to be turned on, all the upper bridge arms of the first bridge arm group to be turned off, all the upper bridge arms of the second bridge arm group to be turned on and all the lower bridge arms of the second bridge arm group to be turned off, so as to form a second loop between all the lower bridge arms of the first bridge arm group, all the windings of the first motor, the at least one inductor, all the upper bridge arms of the second bridge arm group and the power supply module;
wherein the first loop and the second loop are configured to generate heat in a power battery by a current to heat the power battery, and currents flowing through all the windings of the first motor have a same magnitude and phase.