公开(公告)号：US10958181B2

公开(公告)日：2021-03-23

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: H02J7/00 ,  H02M7/5395 ,  H02J7/14 ,  H02M7/5387 ,  B60L53/22 ,  B60L58/10 ,  B60L53/14 ,  B60L53/60 ,  H02M7/793 ,  H02M1/00 ,  H02M1/32 ,  H02M7/219 ,  H02M3/335 ,  H02M1/088 ,  H02M1/36

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 transistor, the third switch transistor and the fourth switch transistor in the H-bridge to be relatively balanced.