Power supply circuit, battery management system, battery pack and electronic device

Abstract

The embodiment of the invention provides a power supply circuit, a battery management system, a battery pack and an electronic device. The power supply circuit comprises a current generation module, a first switch module, an energy storage module and a second switch module. The first switch module is electrically connected between the current generation module and the energy storage module, and is configured to enable the current generated by the current generation module to flow to the energy storage module when the first switch module executes conduction. And the second switch module is electrically connected with the energy storage module and is configured as follows: when the second switch module executes conduction, the energy storage module discharges, and the current formed by discharging flows to the external control unit through the second switch module. Based on the scheme, it can be ensured that the external control unit can normally execute the power-off program, meanwhile, the frequent power-off situation can be effectively dealt with, and the application requirement of the battery management system is met.

Description

technical field [0001] The embodiments of the present application relate to the field of electronic technologies, and in particular, to a power supply circuit, a battery management system, a battery pack, and an electronic device. Background technique [0002] The Battery Management System (BMS) can monitor the status of the battery, and then intelligently manage and maintain each battery unit, prevent the battery from overcharging and overdischarging, and prolong the service life of the battery. In some application scenarios, the control unit of the battery management system can be powered by a power source external to the battery pack. When the power supply is suddenly cut off, the battery management system cannot normally perform the power-off procedure. This will lead to problems such as abnormal data loss and abnormal sleep power consumption in the battery management system. In the case of frequent power-off and power-on actions in a short period of time, the battery m...

AI Technical Summary

Problems solved by technology

When the power supply suddenly loses power, the battery management system cannot normally execute the power-off procedure

This will lead to problems such as abnormal data loss and abnormal sleep power consumption of the battery management system. In the case of frequent power-off and power-on actions in a short period of time, the battery management system is more prone to unknown faults such as software runaway.

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