公开(公告)号：US20220385231A1

公开(公告)日：2022-12-01

申请号：US17826475

申请日：2022-05-27

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhen CAO ,  Guilei GU ,  Su ZHOU ,  Dong CHEN ,  Lei SHI ,  Yanzhong ZHANG

IPC: H02S40/36 ,  H02S40/34 ,  H02S40/32

Abstract: A power converter box and at least one junction box are integrated on a backplane of the photovoltaic module as a whole, and there is a cable for connecting the power converter and the junction box. In this case, relative to the conventional technology in which a junction box is independent of a power converter, a length of a cable used when the junction box and the power converter box are taken as a whole is shorter than a length of a cable used in the conventional technology. In this case, compared with the conventional technology in which a cable is connected to an independently placed power converter, the power converter only needs to establish a connection relationship by using a solder ribbon, a circuit board cable, and the like with low costs, so that production costs are low.

公开(公告)号：US20230223835A1

公开(公告)日：2023-07-13

申请号：US18174855

申请日：2023-02-27

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhen CAO ,  Dong CHEN ,  Xiaofeng YAO

IPC: H02M1/088 ,  H02M1/32 ,  H02M3/158 ,  H02J3/38

CPC classification number: H02M1/088 ,  H02M1/32 ,  H02M3/158 ,  H02J3/38 ,  H02J2300/24

Abstract: A serial-parallel converter protection system includes a controller, a drive, a first switching transistor, and a second switching transistor. An input terminal of a converter is connected to an output terminal of the converter through the first switching transistor. The output terminal of the converter is connected in parallel with the second switching transistor. When an output voltage of the converter is greater than a first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on. In some embodiments, when the output voltage of the converter is greater than the first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on, so that the converter is bypassed, thereby preventing a voltage and a current from impacting a component inside the converter.

公开(公告)号：US20230208182A1

公开(公告)日：2023-06-29

申请号：US18170606

申请日：2023-02-17

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Dong CHEN ,  Zhen CAO ,  Yongquan LIU ,  Xiaofeng YAO

IPC: H02J7/35 ,  H02J3/00

CPC classification number: H02J7/35 ,  H02J3/002 ,  H02J2300/26

Abstract: A power supply system and method. The power supply system includes: a first branch on which a first string is located, a second branch on which a second string is located, a transfer switch unit, a first voltage compensation unit, and a controller. The transfer switch unit is configured to connect the first voltage compensation unit to the first branch based on a voltage compensation enabling signal received from the controller, where the voltage compensation enabling signal is generated by the controller based on an operating state parameter of the first string and an operating state parameter of the second string. The first voltage compensation unit is configured to compensate for an output voltage of the first branch. Thus the system and method can prevent the voltage compensation unit from causing an unnecessary system loss in the branch requiring no voltage compensation, and reduce system costs.