US 12,224,674 B2
DC-DC converter, on-board charger, and electric vehicle
Xiaobin Zhang, Shenzhen (CN)
Assigned to BYD COMPANY LIMITED, Shenzhen (CN)
Filed by BYD COMPANY LIMITED, Guangdong (CN)
Filed on Sep. 29, 2023, as Appl. No. 18/375,432.
Application 18/375,432 is a continuation of application No. 17/050,166, granted, now 11,870,357, previously published as PCT/CN2019/084328, filed on Apr. 25, 2019.
Claims priority of application No. 201810385200.1 (CN), filed on Apr. 26, 2018.
Prior Publication US 2024/0030826 A1, Jan. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 3/335 (2006.01); G01R 15/18 (2006.01); G01R 19/25 (2006.01); H02J 7/00 (2006.01); H02M 1/42 (2007.01); H02M 1/00 (2006.01)
CPC H02M 3/33584 (2013.01) [G01R 15/18 (2013.01); G01R 19/25 (2013.01); H02J 7/007 (2013.01); H02M 1/42 (2013.01); H02M 3/33592 (2013.01); H02J 2207/20 (2020.01); H02M 1/0009 (2021.05)] 20 Claims
OG exemplary drawing
 
1. An on-board charger, comprising a three-phase power factor correction (PFC) circuit and a DC-DC converter, wherein the DC-DC converter comprises:
a first adjustment module, a resonance module, a second adjustment module, a current detection module, and a controller;
the first adjustment module is configured to: adjust frequency of an input signal of the DC-DC converter when a battery module of a vehicle is charged by an external power supply, and rectify an output signal of the resonance module when the battery module is discharged by the external power supply;
the resonance module is configured to: resonate an output signal of the first adjustment module when the battery module of the vehicle is charged by the external power supply, and resonate an output signal of the second adjustment module when the battery module is discharged by the external power supply;
the second adjustment module is configured to: adjust frequency of an output signal of the battery module when the battery module of the vehicle is discharged by the external power supply, and rectify the output signal of the resonance module when the battery module is charged by the external power supply;
the current detection module is configured to detect a current signal of the resonance module; and
the controller is connected to a control end of the first adjustment module and a control end of the second adjustment module, and is configured to control the first adjustment module and the second adjustment module when the current signal is greater than a current threshold, to reduce an output power.