一种基于压力特征参数的锂离子电池析锂检测方法及系统
By using a method based on pressure characteristic parameters, the sensitivity and accuracy issues of lithium plating detection in lithium-ion batteries have been resolved, enabling rapid and accurate assessment of lithium plating amount and state determination. This method is applicable to the safety testing of lithium-ion batteries under different temperatures and operating conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING JIAOTONG UNIV
- Filing Date
- 2025-09-06
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, lithium-ion batteries have a high risk of lithium plating when charged at low temperatures or at high rates, leading to battery capacity degradation and safety hazards. Furthermore, it is difficult to achieve high sensitivity and accurate assessment of lithium plating detection in large-capacity batteries under complex operating conditions.
By conducting battery tests at different charging rates and under constant current/dynamic low-current discharge conditions, pressure curves are recorded, a lithium insertion/extraction benchmark interpolation function is defined, fuzzy c-means clustering is used to determine the lithium plating threshold, the pressure characteristic parameter RLSF reflecting the amount of lithium stripping is extracted, and the influence of temperature is compensated by the coefficient of thermal expansion to achieve the determination of lithium plating state.
It achieves highly sensitive lithium plating detection, is suitable for different temperatures and operating conditions, and can quickly and accurately quantify and evaluate the amount of lithium plating. It overcomes the limitations of voltage and impedance signals and has strong adaptability.
Smart Images
Figure CN121208686B_ABST