Power supply protection circuit and power supply system

By using the energy storage module and discharge control module in the power supply protection circuit, a stable power supply voltage is generated, which solves the problem of controller startup failure or crash caused by unstable photovoltaic voltage, and realizes the stability and reliability of power supply.

CN121238465BActive Publication Date: 2026-06-09SHENZHEN POWEROAK NEWENER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN POWEROAK NEWENER CO LTD
Filing Date
2025-11-28
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In photovoltaic applications of energy storage systems, the output photovoltaic voltage is unstable in the morning or during periods of poor sunlight, causing the controller to fail to start or crash.

Method used

The power supply protection circuit includes a first energy storage module, a second energy storage module, a discharge control module, and a power supply switch module. By setting energy storage modules and discharge control modules with different charging efficiencies, the power supply voltage is monitored in real time to generate a stable power supply voltage, and the power supply switch module controls the conduction and disconnection of the power supply path.

Benefits of technology

It effectively prevents unstable power supply voltage from being output to the controller, avoiding the controller's inability to start or crash due to power supply abnormalities such as undervoltage or overvoltage.

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    Figure CN121238465B_ABST
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Abstract

The application relates to a power supply protection circuit and a power supply system. The power supply protection circuit comprises a first energy storage module, a second energy storage module, a discharge control module and a power supply switch module. The first energy storage module is charged in response to a power supply voltage of a power supply, and generates a first voltage. The second energy storage module is charged in response to the power supply voltage, and generates a second voltage. The charging efficiency of the second energy storage module is less than the charging efficiency of the first energy storage module. The discharge control module is used for receiving the first voltage and the power supply voltage, and works to discharge the second energy storage module when the first voltage is greater than the power supply voltage. The power supply switch module is used for turning on a power supply path between the power supply and a controller when the second voltage is greater than or equal to a preset threshold value, and cutting off the power supply path when the second voltage is less than the preset threshold value. Unstable power supply voltage can be prevented from being output to the controller.
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