公开(公告)号：US20240235378A1

公开(公告)日：2024-07-11

申请号：US18614196

申请日：2024-03-22

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Wenbin Hou ,  Xiaoqiu Li ,  Yanjun Hu

IPC: H02M1/32 ,  B60L53/60 ,  H02J7/00 ,  H02M1/42 ,  H02M3/335

CPC classification number: H02M1/322 ,  B60L53/60 ,  H02J7/0063 ,  H02M1/4233 ,  H02M3/33573 ,  H02M3/33576 ,  B60L2210/10

Abstract: This application discloses a bus capacitor discharging method and a related device thereof. The discharging method is applicable to a DC/DC converter, and the DC/DC converter includes a chopper unit, a transformer, and a rectifier unit. A bus capacitor is coupled to the chopper unit, the chopper unit is coupled to a primary side of the transformer, a secondary side of the transformer is coupled to the rectifier unit, and the chopper unit and the rectifier unit are both coupled to a controller. During specific implementation, when determining to discharge the bus capacitor, the controller may control the rectifier unit to short-circuit the secondary side of the transformer, and control the chopper unit to close a loop formed between the bus capacitor and the primary side of the transformer.

公开(公告)号：US11860243B2

公开(公告)日：2024-01-02

申请号：US17566291

申请日：2021-12-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Lei Zhou ,  Xiaoqiu Li

IPC: G01R31/69 ,  B60L53/66 ,  B60L53/16

CPC classification number: G01R31/69 ,  B60L53/16 ,  B60L53/66

Abstract: A plug status detection circuit, a controller, and a vehicle are provided, to detect a plug status in different standards by using one detection circuit. The plug status detection circuit includes a wake-up circuit and a sampling circuit. The wake-up circuit is configured to immediately output or delay outputting a wake-up signal based on a resistance value of a connected resistor of the plug status detection circuit when a plug is connected to a socket, where the wake-up signal is used to trigger a CPU to drive the sampling circuit. The sampling circuit is configured to inject a startup voltage under the drive of the CPU, and after the startup voltage is injected, a level of a detection point of the sampling circuit is used to indicate a plug status.

公开(公告)号：US20230369979A1

公开(公告)日：2023-11-16

申请号：US18361016

申请日：2023-07-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xiaoqiu Li

IPC: H02M3/158 ,  H02M1/08 ,  B60L53/22

CPC classification number: H02M3/1582 ,  H02M1/083 ,  B60L53/22 ,  B60L2210/10

Abstract: A conversion circuit includes a buck-boost unit and a switched capacitor unit. The buck-boost unit may perform buck conversion or boost conversion on a received first input voltage, use a first input voltage obtained after the buck conversion or boost conversion as a forward voltage, and provide the forward voltage for the switched capacitor unit. The switched capacitor unit may perform boost conversion on the forward voltage, and output a forward voltage obtained after the boost conversion as a first output voltage. The conversion circuit may support continuous adjustment of a transformation ratio, and a maximum transformation ratio of the conversion circuit is not limited by a transformation ratio of the switched capacitor unit. The first output voltage of the conversion circuit may be any voltage not less than the first input voltage.