Overvoltage protection circuit and energy storage power supply

The embodiment of the invention relates to an overvoltage protection circuit and an energy storage power supply. The overvoltage protection circuit is arranged on a power supply line, and a relay is arranged on the power supply line. The relay control module is configured to control the relay to be closed when receiving the first control signal; when the second control signal is received, the relay is controlled to be switched off; the overvoltage detection module is configured to output an overvoltage signal when the input voltage on the power supply line is greater than a preset threshold value; and the overvoltage control module is configured to control the pre-charging module to be in an off state when receiving the overvoltage signal, and lock the control signal received by the relay control module at a second control signal. According to the overvoltage protection circuit, the input voltage of the power supply line is detected, when the overvoltage of the input voltage is detected, the pre-charging modu