A dual-battery charging and discharging circuit

By coordinating the control module and the switch module, the voltage difference between the two batteries is automatically adjusted, which solves the problem of inconsistent voltage during the disassembly and assembly of dual-battery powered equipment, and improves charging and discharging efficiency and equipment reliability.

CN224626313UActive Publication Date: 2026-08-11SHENZHEN FENGHEYUAN TECH
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Patent Information

Application Number
CN202521812216.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2026-08-11
Estimated Expiration
2035-08-25

AI Technical Summary

Technical Problem

Existing dual-battery powered devices are prone to voltage inconsistencies during disassembly and assembly, leading to energy loss, battery damage, low charging efficiency, and insufficient adaptive adjustment capabilities.

Method used

The system uses a control module to detect battery voltage and a switch module to control the charging and discharging modes. It prioritizes using high-voltage batteries for power supply or charging low-voltage batteries, thereby automatically adjusting the battery voltage difference and preventing backflow and overcharging/over-discharging.

Benefits of technology

Automatically adjusts charging and discharging modes to reduce energy loss, extend battery life, improve charging efficiency, adapt to the rapid adaptation needs of removable batteries, reduce hardware costs, and improve device reliability.

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Abstract

This utility model discloses a dual-battery charging and discharging circuit, including: a control module, a first switch module, a second switch module, a first battery, and a second battery; the control module is connected to the first battery and the second battery respectively, and is used to detect the voltage of the first battery and the second battery; the control module is also connected to the first switch module and the second switch module respectively, and is used to control the conduction and cutoff of the first switch module and the second switch module according to the voltage difference between the first battery and the second battery, so as to realize the switching of charging and discharging modes. In the discharging mode, the high-voltage battery is given priority to be powered or the batteries are connected in parallel to be powered; in the charging mode, the low-voltage battery is given priority to be charged or the batteries are connected in parallel to be charged.
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