Battery protection circuit and power supply equipment

By setting up a self-locking circuit unit and a charging detection unit in the battery protection circuit, the problem of continuous power consumption of the battery in the sleep state is solved, and the safety protection of the battery and the service life are extended.

CN119696122APending Publication Date: 2025-03-25SHENZHEN GREEN CONNECTION TECH CO LTD
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Patent Information

Application Number
CN202411999005.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

In the prior art, the battery continues to consume power while in a dormant state, resulting in exhaustion of battery power, greatly reducing capacity and life, and posing safety hazards.

Method used

A battery protection circuit is designed, including a charge and discharge switch unit, a voltage stabilization circuit unit, a self-locking circuit unit, a charge detection unit and a battery management unit. Through the setting of the self-locking circuit unit, the battery management unit outputs a second level signal when the battery power is lower than the preset value, drives the self-locking circuit unit into the shutdown state, cuts off the power supply of the circuit, and enters the "mechanical" shutdown state.

Benefits of technology

It effectively avoids the battery's continued power consumption when the battery is low, prevents irreversible damage, improves the service life of the battery and the power equipment used, and reduces safety hazards.

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Abstract

The invention relates to the technical field of battery management, and relates to a battery protection circuit and power supply equipment. The circuit comprises a charging and discharging switch unit, a voltage stabilizing circuit unit, a self-locking circuit unit, a charging detection unit and a battery management unit, the charge-discharge switch unit is arranged between the battery and the load circuit, and the driving end of the charge-discharge switch unit is connected with the battery management unit; the self-locking circuit unit is arranged between the positive electrode of the load circuit and the voltage input end of the voltage stabilizing circuit unit, and the voltage output end of the voltage stabilizing circuit unit is connected with the power supply end of the battery management unit; the charging detection unit is used for feeding back a first level signal to the battery management unit based on the potentials of the negative electrode of the battery and the grounding end of the load circuit, and driving the self-locking circuit unit to enter a self-locking conduction state; the battery management unit is used for comparing the battery electric quantity with a preset value and then outputting a second level signal so as to drive the self-locking circuit unit to enter a turn-off state. The service lives of the battery and the applied power supply equipment can be prolonged, and potential safety hazards are reduced.
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