Battery pack fault early-warning method and apparatus, and vehicle, storage medium and program product
By performing Fourier transform and equivalent circuit conversion on the voltage response signals of the battery pack cells, the risk of battery pack failure can be identified, which solves the problem of insufficient early warning of battery pack failure in the existing technology and realizes early warning of battery pack failure and reduction of safety risks.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2025-10-15
- Publication Date
- 2026-07-09
AI Technical Summary
Existing technologies lack effective early warning methods for electric vehicle battery pack failures. Warnings are typically only issued when a cell fails or is about to fail, which fails to prevent potential safety risks.
By acquiring the voltage response signal of each cell in the battery pack, performing windowed Fourier transform and equivalent circuit conversion, the imaginary part of the impedance of each cell at a predetermined frequency is determined, abnormal data points are identified to provide early warning of battery pack failures, and the capacitive reactance value at a suitable frequency is selected as a judgment parameter by utilizing the imaginary part of the impedance of the cell under different compression conditions.
It enables early warning of battery pack failures, reduces vehicle safety risks, and allows for timely measures to prevent safety accidents caused by battery pack failures.
Smart Images
Figure CN2025127864_09072026_PF_FP_ABST