Backup power supply device and electronic device

By monitoring the status of the secondary battery through voltage conversion circuits and monitoring circuits, the problems of reduced battery capacity and ineffective power consumption under microcomputer management are solved, achieving efficient protection of the secondary battery and reliable backup function.

CN122374822APending Publication Date: 2026-07-10MAXELL LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MAXELL LTD
Filing Date
2025-03-03
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the prior art, using a microcomputer to manage the charging and discharging process of a secondary battery can lead to a reduction in battery capacity and may result in the inability to restore backup operation when the battery has not been charged or used for a long time, resulting in useless power consumption and battery life problems.

Method used

A voltage conversion circuit and a voltage monitoring circuit are used. By monitoring the voltage state of the secondary battery, the operation of the voltage conversion circuit is controlled to prevent unnecessary power consumption and restore standby operation when necessary. The function of the voltage conversion circuit can be restored using a simple circuit.

Benefits of technology

It effectively protects secondary batteries, prevents unnecessary power consumption, ensures the backup function of semiconductor memory, supports long-term storage and rapid recovery to backup state, and improves battery efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The protection of the secondary battery is performed without the secondary battery losing the capacity that it originally has, and the unnecessary power consumption of the secondary battery is suppressed at the time of output short circuit and at the time of storage. A voltage conversion circuit that converts the voltage of the secondary battery into a backup voltage required for a semiconductor memory is provided, a voltage monitoring circuit that monitors the output voltage is provided on the output side of the voltage conversion circuit, and in the case where the result of the voltage monitoring is a state of short circuit or a state close to short circuit, the operation of the voltage conversion circuit is stopped.
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