US 12,485,800 B2
Traction battery heating circuit, system, and control method, and electric device
Xiaojian Huang, Ningde (CN); Zhimin Dan, Ningde (CN); Jinfeng Gao, Ningde (CN); and Jin Huang, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Apr. 20, 2023, as Appl. No. 18/303,584.
Application 18/303,584 is a continuation of application No. PCT/CN2022/085823, filed on Apr. 8, 2022.
Claims priority of application No. PCT/CN2021/110708 (WO), filed on Aug. 5, 2021.
Prior Publication US 2023/0256867 A1, Aug. 17, 2023
Int. Cl. B60L 58/27 (2019.01); B60L 1/02 (2006.01); B60L 50/51 (2019.01); B60L 53/22 (2019.01); B60L 58/12 (2019.01); B60L 58/25 (2019.01); H01M 10/615 (2014.01); H01M 10/625 (2014.01); H01M 10/63 (2014.01); H02M 7/537 (2006.01)
CPC B60L 58/27 (2019.02) [B60L 1/02 (2013.01); B60L 50/51 (2019.02); B60L 53/22 (2019.02); B60L 58/12 (2019.02); B60L 58/25 (2019.02); H01M 10/615 (2015.04); H01M 10/625 (2015.04); H01M 10/63 (2015.04); H02M 7/537 (2013.01); B60L 2210/40 (2013.01); B60L 2240/545 (2013.01); H01M 2220/20 (2013.01)] 18 Claims
OG exemplary drawing
 
11. A traction battery heating control method, applied by a traction battery heating circuit, wherein the traction battery heating circuit comprises a power supply module, an inverter module, a driving module, and a control module,
wherein the power supply comprises at least one battery group,
the inverter module is connected to the power supply module and comprises an M-phase leg circuit, wherein the M-phased leg circuit is connected in parallel to the battery group, and M is an even multiple of three,
the driving module comprises a motor having M windings, wherein the M windings are respectively connected to M phase legs of the leg circuit in one-to-one correspondence,
the control module is connected to the leg circuit,
wherein the traction battery heating control method comprises:
sending, by the control module, an enabling signal to the inverter module, the enabling signal comprising a first enabling signal and a second enabling signal at a preset frequency, wherein
the first enabling signal controls upper legs of at least three phase legs in the M-phase leg circuit and lower legs of the same number of phase legs in remaining legs of the M-phase leg circuit to be turned on and controls the lower legs of the at least three phase legs and upper legs of the remaining phase legs to be turned off, so that the power supply module, the inverter module, and the driving module of the battery heating circuit form a charge loop,
the second enabling signal controls the lower legs of the at least three phase legs and the upper legs of the remaining phase legs to be turned on and controls the upper legs of the at least three phase legs and the lower legs of the remaining phase legs to be turned off to form a discharge loop, whereby the charge loop and the discharge loop are alternately switched.