Zte Corporation

Shihao Qin

Jianye Liu

Mingming Liu

Baohang Zhou

Lingqiao Teng

Min Shao

Guohua Tang

Yuhui Ye

Shuo Su

Bao Song

Provided is a distributed insulation detection device for a multi-stage DC system. A basic insulation combination module is configured to detect a ground insulation fault of the multi-stage DC system, a sampling module is configured to collect voltage data and/or leakage current data of the multi-stage DC system, to transmit the collected voltage data and/or the leakage current data to an intelligent control module for data processing, to control a resistance value of the basic insulation combination module and a resistance value of an intelligent resistance switching network module, so as to adjust a total balance resistance of the distributed insulation detection device for the multi-stage DC system.

Distributed insulation detection device for multi-stage DC system

A storage battery device, a charging and discharging monitoring method and device thereof and a corresponding system are described. The storage battery device includes multiple storage batteries connected in parallel. A storage battery switching unit connected in series with each storage battery is arranged on a parallel branch circuit where the storage battery is located, and includes a charging control unit configured to switch on or switch off a charging loop of the storage battery and a discharging control unit connected in parallel with the charging control unit and configured to switch on or switch off a discharging loop of the storage battery.

Storage battery device, and charging-discharging monitoring method, device and system thereof

A protection circuit of a communication interface includes: a first-level protection circuit, a second-level protection circuit and a third-level protection circuit that are sequentially connected, wherein the first-level protection circuit comprises a current discharge circuit comprising a first connection end, a second connection end and a third connection end, wherein the first connection end is connected with a first signal line of an RS-485 port, the second connection end is connected with a second signal line of the RS-485 port, and the third connection end is connected to the protection ground; the second-level protection circuit comprises a first current limiting resistor, a second current limiting resistor and a bidirectional transient suppression diode; and the third-level protection circuit comprises a voltage discharge circuit.

Protection circuit of communication interface

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Shenzhen, China

Shihao Qin