Title:
CHARGING CIRCUIT FOR ON-BOARD CHARGER, ON-BOARD CHARGER, AND CHARGING CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2021/227537
Kind Code:
A1
Abstract:
The present application provides a charging circuit for an on-board charger, an on-board charger, and a charging control method, pertaining to the technical field of on-board chargers. A second end of a first power conversion circuit of the charging circuit is connected to a first end of a second power conversion circuit. A high-voltage output terminal of the second power conversion circuit charges a power battery pack of an electric vehicle. A first low-voltage output terminal of the second power conversion circuit supplies power to a low-voltage system of the electric vehicle. When the electric vehicle is in a charging mode, the first power conversion circuit converts an alternating current input into a first terminal of the first power conversion circuit into a direct current, and transmits the direct current to the first terminal of the second power conversion circuit. When the electric vehicle is in a traveling mode, the first power conversion circuit performs, on the direct current obtained from the second power conversion circuit, direct current conversion and then supplies the result to the low-voltage system. When the electric vehicle is in the traveling mode, the second power conversion circuit converts a high voltage of the power battery pack into a low voltage, transmits the low voltage to the first low-voltage output terminal, and outputs a direct current to the first power conversion circuit.
Inventors:
GU SHIDA (CN)
ZHANG WEI (CN)
CHENG YANG (CN)
CUI ZHAOXUE (CN)
ZHANG WEI (CN)
CHENG YANG (CN)
CUI ZHAOXUE (CN)
Application Number:
PCT/CN2020/141899
Publication Date:
November 18, 2021
Filing Date:
December 31, 2020
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02J7/06; H02M1/42; H02M3/335; H02M7/219
Foreign References:
| CN111641247A | 2020-09-08 | |||
| CN109756122A | 2019-05-14 | |||
| CN102694409A | 2012-09-26 | |||
| CN110040028A | 2019-07-23 | |||
| EP1919070A2 | 2008-05-07 | |||
| KR102064876B1 | 2020-02-12 | |||
| CN202010413876A | 2020-05-15 |
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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