Battery protection circuit, battery assembly and electronic device

Abstract

The invention provides a battery protection circuit which comprises a battery protection module and a first switch unit. The battery protection module comprises an over-discharge voltage protection unit, a discharge over-current protection unit, a reference voltage generation unit and a logic control unit; the logic control unit is electrically connected with the first switch unit so as to control on or off of the first switch unit; the first switch unit is used for controlling a battery to supply power to a system circuit; the battery protection circuit further comprises a capacitance detection module, the capacitance detection module comprises a capacitance detection unit, the capacitance detection unit is used for being electrically connected with the detection electrode, the capacitance detection module is further electrically connected with the battery protection module, and when the capacitance detection unit detects capacitance change, the capacitance detection module sends a shipping control signal to the battery protection module. The battery protection module enters or exits from the shipping mode, and in the shipping mode, the first switch unit is switched off to enable the battery to stop supplying power to the system circuit. The invention further provides a battery assembly and an electronic device.

Description

technical field [0001] The present application relates to the field of battery technology, in particular to a battery protection circuit, a battery assembly and an electronic device. Background technique [0002] Existing electronic cigarettes usually consist of two parts: a device and a pod with an atomizer. The pod stores e-liquid, and the atomizer atomizes the e-liquid when the atomizer is working; the device is equipped with a battery, a system circuit, and an airflow sensor. (such as a microphone), the battery is electrically connected to the system circuit, and the system circuit is electrically connected to the atomizer and the air flow sensor respectively. When the air flow sensor detects the air flow caused by the user smoking, the system circuit judges that the user has a smoking action, and the system The circuit controls the output power of the atomizer, and the atomizer heats and atomizes the e-liquid to achieve smoke. [0003] The inventors of the present appl...

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Problems solved by technology

[0003] The inventor of the present application found that, regardless of conventional electronic cigarettes or disposable electronic cigarettes, the battery always needs to supply power to the system circuit, the system circuit always supplies power to the airflow sensor, and the system circuit, airflow sensor and other internal circuits will continue to consume battery power

However, the power of the battery is certain. When the e-cigarette with a battery with a preset power is manufactured at the production site, the e-cigarette will be transported (such as by sea), stored for a long time, and finally sold to the end user. When the end user When using a brand new e-cigarette for the first time, due to the long-term transportation and storage of the e-cigarette, the battery may be exhausted or consumed a lot due to the consumption of the internal circuit of the e-cigarette, so that the end user cannot directly pick up the e-cigarette Just use or use e-cigarettes for a short period of time to run out of power. Due to the urgency and persistence of smoking, the experience of users using e-cigarettes is worse than that of traditional cigarettes.

Moreover, the existing electronic cigarettes have relatively single functions

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