Battery protection chip, battery assembly and electronic cigarette

CN114794586BActive Publication Date: 2026-07-21XI 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
2026-07-21

AI Technical Summary

Technical Problem

In existing electronic cigarettes, the over-inhalation protection mechanism of the airflow sensor is prone to failure, causing the first switching unit to work for a long time, resulting in excessive temperature rise, damage to the circuit and safety hazards, especially when high current discharge occurs.

Method used

The circuit design employs a battery protection chip, which includes a battery protection module and a second switching unit. Through a two-stage over-sucking protection unit and a logic control unit, the second switching unit is controlled to disconnect when the voltage of the overheat detection pin is abnormal, preventing prolonged operation. The circuit design includes a power supply pin, a ground pin, an over-discharge voltage protection unit, a discharge overcurrent protection unit, and a logic control unit.

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, is low in cost, is compatible with existing electronic cigarettes, and has a wide range of applications.

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Abstract

The application provides a battery protection chip applied to an electronic cigarette, comprising a battery protection module and a second switch unit; the battery protection module further comprises a secondary overcharge protection unit and a heating detection pin, the secondary overcharge protection unit is electrically connected with the heating detection pin and the logic control unit respectively, the heating detection pin is used for being electrically connected with a connection point of a first switch unit and a heating element or the heating detection pin is used for being electrically connected with a control end of the first switch unit, when the secondary overcharge protection unit judges that the voltage of the heating detection pin is greater than a third preset reference voltage or less than a fourth preset reference voltage, the logic control unit starts timing, 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 further provides a battery assembly and an electronic cigarette.
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