Self-locking circuit and corresponding BMS battery protection board

By introducing a delay enable module and a delay unit into the self-locking circuit, the problem that the self-locking circuit system cannot continuously provide the enable driving voltage is solved, the stable operation and self-protection function of the system are realized, and the stability of the BMS battery protection board is improved.

CN115800453BActive Publication Date: 2025-03-25SHENZHEN DAREN HIGH TECH ELECTRONICS CO LTD
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Patent Information

Application Number
CN202211548341.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-05
Publication Date
2025-03-25
Estimated Expiration
2042-12-05

AI Technical Summary

Technical Problem

The existing self-locking circuit system cannot continuously and stably provide the enable drive voltage, resulting in the automatic power-off of the system and unable to operate normally.

Method used

A self-locking circuit is designed, including a power supply module, a delay enable module, a switch module, a system power module and a microcontroller module. The delay enable module releases energy when the microcontroller module is abnormally reset through the delay unit, and delays the enable signal to maintain the normal working state of the system.

Benefits of technology

It effectively solves the problem of power failure caused by abnormal reset of the self-locking circuit system, ensures that the system will power down normally under specific conditions, improves the functional stability of the BMS battery protection board, and brings a good user experience to users.

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Abstract

The present invention provides a self-locking circuit and a corresponding BMS battery protection board, wherein the self-locking circuit includes a power supply module, a delay enable module, a switch module, a system power supply module, and a micro-control module. The power supply module is used to generate a power supply voltage, and the delay enable module is used to generate an enable signal. The switch module can receive the power supply voltage, drive the switch module to conduct based on the enable signal, and the switch module is used to output the power supply voltage to the system power supply module. The system power supply module performs a step-down operation on the power supply voltage, and the system power supply module can generate a system power supply voltage. The micro-control module supplies power based on the system power supply voltage, and the micro-control module generates a feedback signal based on the system power supply voltage. The delay enable module generates an enable signal based on the feedback signal, and the enable module also includes a delay unit. When the micro-control module works normally, the delay unit stores energy based on the power supply voltage. When the micro-control module is abnormally reset, the delay unit releases energy to delay the enable signal.
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