High-side driving circuit, high-side driving method and battery management system

By using a single transistor combined with a control subcircuit and a drive circuit in the battery protection device, independent control of the charging circuit and the discharging circuit is achieved, solving the problems of complex structure and limited applicability in the existing technology, improving system reliability and reducing costs.

WO2025209000A1 Publication Date: 2025-10-09INNOSCIENCE (SUZHOU) SEMICON CO LTD
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Patent Information

Application Number
PCT/CN2025/073023
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-04-03
Filing Date
2025-01-17
Publication Date
2025-10-09

AI Technical Summary

Technical Problem

Existing battery protection devices have a complex structure and are only applicable to the case of combining two silicon-based N-type MOSFET transistors. They cannot be used in combination with a single transistor, and cannot achieve independent control of the charging circuit and the discharging circuit.

Method used

A single transistor (first transistor) is used in combination with a control sub-circuit, a drive start circuit, and a drive management circuit. By controlling the charging protection signal and the discharging protection signal, independent control of the charging circuit and the discharging circuit is achieved, which is suitable for scenarios with a single control transistor.

Benefits of technology

The structural complexity of the battery protection device is reduced, the design process is simplified, the reliability and maintainability of the system are improved, the development time is reduced, and the overall cost is reduced.

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Abstract

Disclosed are a high-side driving circuit, a high-side driving method and a battery management system. The circuit comprises a control sub-circuit, a first transistor, a driving starting circuit and a driving management circuit. The control sub-circuit comprises a charging protection signal output end and a discharging protection signal output end; a first electrode of the first transistor is coupled to a second battery connecting end, and a second electrode thereof is coupled to a second terminal of a battery pack; the driving starting circuit is used for controlling the connection or disconnection of the electrical connection between an output end of a power supply voltage signal and a gate electrode of the first transistor; and the driving management circuit is used for controlling the connection or disconnection of the electrical connection between the gate electrode of the first transistor and the first electrode of the first transistor and the electrical connection between the gate electrode of the first transistor and the second electrode of the first transistor.
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