公开(公告)号：US20200083815A1

公开(公告)日：2020-03-12

申请号：US16465944

申请日：2017-12-01

Applicant: BYD COMPANY LIMITED

Inventor： Ni ZHANG ,  Xinghui WANG ,  Chao WANG ,  Xiaofeng SHEN ,  Baihe WU

IPC: H02M3/335 ,  H02J7/00 ,  H02M1/088 ,  H02M1/36 ,  B60L53/22

Abstract: A control method includes the following steps: when the DC-DC converter works every time, acquiring total time TC for controlling an H-bridge in a third mode and total time TD for controlling the H-bridge in a fourth mode, and acquiring set time Ti for controlling the H-bridge in the third mode and set time Tm for controlling the H-bridge in the fourth mode in each working cycle during a working process of the DC-DC converter; judging a relation between the TC and the TD; and selecting the mode for controlling the H-bridge when the DC-DC converter is started according to the relation between the total time TC and the total time TD, and alternately controlling the H-bridge according to the Ti and the Tm, the second switch tube, the third switch tube and the fourth switch tube in the H-bridge to be relatively balanced.