US 12,068,466 B2
Battery heating system and method, power supply system, and electrical apparatus
Xinwei Chen, Ningde (CN); Yu Yan, Ningde (CN); Zhimin Dan, Ningde (CN); Zhanliang Li, Ningde (CN); Yizhen Hou, Ningde (CN); and Wei Zhang, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Aug. 15, 2023, as Appl. No. 18/450,375.
Application 18/450,375 is a continuation of application No. PCT/CN2021/143908, filed on Dec. 31, 2021.
Prior Publication US 2023/0387492 A1, Nov. 30, 2023
Int. Cl. H01M 10/615 (2014.01); G01R 31/36 (2020.01); G01R 31/367 (2019.01); H01M 10/633 (2014.01)
CPC H01M 10/615 (2015.04) [G01R 31/3648 (2013.01); G01R 31/367 (2019.01); H01M 10/633 (2015.04); H01M 2220/20 (2013.01)] 18 Claims
 
1. A battery heating system, comprising:
a voltage conversion unit configured to be electrically connected to a power source and to a battery to be heated, to receive a first voltage input by the power source or a second voltage input by the battery to be heated, a charging and discharging frequency of the voltage conversion unit being a maximum switching frequency of the voltage conversion unit; and
a control unit for acquiring the charging and discharging frequency of the voltage conversion unit, determining a charge transfer impedance of the battery to be heated according to the charging and discharging frequency, calculating a safe amplitude current of the battery to be heated according to the charge transfer impedance, and sending a control signal to the voltage conversion unit according to the charging and discharging frequency and the safe amplitude current to cause the voltage conversion unit to perform boost or buck processing of the first voltage or the second voltage according to the control signal.