Sungrow Power Supply Co., Ltd.

Qingqing Xu

Jianjie Zhou

Xiaodong Mei

Houlai Geng

Yonghong Li

Peng Chen

Puyun Dong

Haoyuan Li

Benhe Yang

Hui Tong

Wenhao Li

Jun Xing

Yin Zhu

A battery cluster management device and a battery energy storage system are provided. The battery cluster management device includes a networking circuit and an integrated controller, a connecting circuit of the networking circuit and a power conversion circuit connected in series, the integrated controller is respectively connected to the connecting circuit, the power conversion circuit, and a BMU in a battery cluster, and the integrated controller is configured to: perform a preset battery management process according to preset electrical information fed back by the connecting circuit and the BMU, and control the power conversion circuit to perform a preset current conversion process. In the present disclosure, the connecting circuit and the power conversion circuit are integrated, thus repeated voltage and current detection circuits and corresponding soft start circuits are unnecessary, the integration level of the battery cluster management device is improved effectively, and the overall cost is reduced.

Battery cluster management device and battery energy storage system

A wiring device of photovoltaic power generation equipment includes an aluminum wire and a copper-aluminum transition element. One end of the aluminum end is connected with the aluminum end of the copper-aluminum transition piece, and the other end of the aluminum end is configured to connect with an external connecting component. The copper end is configured to connect with photovoltaic power generation equipment. In the wiring device of the photovoltaic power generation equipment provided in the present application, the copper-aluminum transition piece is arranged at the position of the photovoltaic power generation equipment, and the aluminum end of the copper-aluminum transition piece is connected to the external connecting component by the aluminum wire, avoiding using copper wire for long-distance conduction. The cost of the aluminum wire is much lower than that of the copper wire. Therefore, the cost of the wiring device provided by the application is reduced.

Wiring device of photovoltaic equipment

Provided is a grid-connected inverter safety detection device applied in a photovoltaic inverter system and including voltage detection circuit, a filter circuit, a comparison circuit and a controller. The voltage detection circuit is configured to detect a voltage between the point N and the ground, or a voltage between the first terminal for any phase of the three-phase power grid and the ground. The filter circuit is configured to filter out an alternating current component of the voltage detected by the voltage detection circuit and to retain an direct current component of the voltage. The comparison circuit is configured to compare the direct current component of the voltage with a preset voltage value and transmit a comparison result to the controller. The controller is configured to determine, according to the comparison result, whether an alternating current side at the output terminal of the inverter has normal insulation.

Safety detection device and method of grid-connected inverter

Growing community of inventors

Anhui, China

Qingqing Xu