公开(公告)号：US11685289B2

公开(公告)日：2023-06-27

申请号：US17562286

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jinfeng Gao ,  Chen Qi ,  Xiyang Zuo ,  Xiaojian Huang

IPC: B60L58/12 ,  B60L50/64 ,  H02J7/00

CPC classification number: B60L58/12 ,  B60L50/64 ,  H02J7/007 ,  B60L2210/10 ,  B60L2210/30

Abstract: Embodiments of the present application provide a charging and discharging device. The charging and discharging device includes an AC/DC converter, a first DC/DC converter, a second DC/DC converter and a control unit. The control unit is used to: receive a first charging request, the first charging request including a first charging voltage and a first charging current; set output power of the first DC/DC converter based on the first charging voltage and the first charging current; turn on the second DC/DC converter if an SOC of the energy storage unit is greater than a first threshold to charge the battery by the energy storage unit; and adjust output power of the second DC/DC converter, so as to enable a voltage difference between a bus voltage and a bus balance voltage of the charging and discharging device to be less than or equal to a preset value.