US 12,230,987 B2
Power conversion device
Weiping Sun, Ningde (CN); Zhimin Dan, Ningde (CN); Zhanliang Li, Ningde (CN); Shuyun Xiong, Ningde (CN); and Yu Yan, 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 Aug. 27, 2021, as Appl. No. 17/459,220.
Application 17/459,220 is a continuation of application No. PCT/CN2021/074196, filed on Jan. 28, 2021.
Prior Publication US 2022/0239127 A1, Jul. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); B60L 58/12 (2019.01); G01R 31/382 (2019.01)
CPC H02J 7/0047 (2013.01) [B60L 58/12 (2019.02); G01R 31/382 (2019.01)] 19 Claims
OG exemplary drawing
 
1. A method for pre-charging a power conversion device, wherein the power conversion device is configured to perform power conversion between a charging pile and a traction battery, and the method comprises:
receiving, by the power conversion device, a first message sent by a battery management system of the traction battery, and the first message is configured to indicate that the battery management system is ready for charging;
performing, by the power conversion device, a pre-charging, and the pre-charging comprises: charging a capacitor in the power conversion device; and
forwarding, by the power conversion device, the first message to the charging pile after the pre-charging is completed;
the power conversion equipment is connected between the charging pile and a power consumption device, and the power consumption device comprises the traction battery.