Battery protection circuit, battery assembly and electronic cigarette

By introducing a two-stage over-inhalation protection mechanism with a battery protection circuit into the electronic cigarette, and by using load detection and a logic control unit to disconnect the second switching unit, the problem of temperature rise caused by the long-term operation of the first switching unit is solved, thereby improving the safety and reliability of the electronic cigarette.

CN114631651BActive Publication Date: 2026-07-17XI AN WENXIAN SEMICON TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN WENXIAN SEMICON TECH CO LTD
Filing Date
2022-03-31
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing electronic cigarettes, the first switching unit is prone to damage due to excessive temperature rise during prolonged operation, which can lead to an increase in the internal temperature of the entire electronic cigarette and potentially cause safety issues. Furthermore, existing protection mechanisms are prone to failure or incompleteness.

Method used

A battery protection circuit is adopted, including a battery protection module and a second switching unit. Two-stage over-suction protection is achieved through load detection and a logic control unit. When the logic control unit detects that the current exceeds the threshold, it counts the time and disconnects the second switching unit after a preset time to prevent prolonged operation.

Benefits of technology

It effectively prevents the first switching unit and system control module from being damaged by high temperature, reduces the risk of electronic cigarette damage, improves safety, and does not require the addition of an extra switching unit, resulting in low cost and compatibility with existing electronic cigarettes.

✦ Generated by Eureka AI based on patent content.

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    Figure CN114631651B_ABST
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Abstract

The application provides a battery protection circuit applied to an electronic cigarette, comprising a battery protection module and a second switch unit, wherein the battery protection module further comprises a secondary over-charge protection unit and a load detection unit, the secondary over-charge protection unit is electrically connected with the load detection unit and a logic control unit respectively, the load detection unit is used for obtaining a first detection voltage, the first detection voltage is used for corresponding to a current in a discharge main loop where the second switch unit is located, when the secondary over-charge protection unit judges that the current in the discharge main loop is greater than a first current threshold according to the first detection voltage, the logic control unit starts timing, and when the timing duration of the logic control unit is greater than or equal to a second preset duration, the logic control unit controls the second switch unit to remain disconnected. The application also provides a battery assembly and an electronic cigarette.
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