Intelligent sampling of battery cells for in-depth quality evaluation and analysis

EP4623295A1Pending Publication Date: 2025-10-01LIMINAL INSIGHTS INC
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Patent Information

Application Number
EP2023833272
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-22
Filing Date
2023-11-23
Publication Date
2025-10-01

AI Technical Summary

Technical Problem

Current methods for detecting defects in battery cells are inefficient, as they often require costly and time-consuming processes like X-ray scans and teardowns, and are unable to detect operational defects such as lithium plating and electrolyte degradation, leading to potential catastrophic failures.

Method used

A two-stage acoustic signal-based system is deployed on battery cell manufacturing lines, using a first scanner for rapid anomaly detection and a second scanner for high-resolution confirmation, allowing for intelligent selection of defective cells for in-depth analysis, reducing waste and resource allocation.

Benefits of technology

This approach effectively identifies defective cells with high confidence, minimizing unnecessary in-depth analysis of defect-free cells and preventing defective cells from entering the market, thereby enhancing manufacturing efficiency and quality control.

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Abstract

Provided is an approach for fast and efficient analysis of acoustic signals to detect anomalies in battery cells and using the results of such analysis for intelligent selection of a subset of battery cells for in-depth quality control analysis. In one aspect, a system includes a first acoustic scanner configured to scan a battery cell; determine if the battery cell is potentially anomalous or not; and send the battery cell for a high-resolution scan if the battery cell is determined to be potentially anomalous. The system further includes a second acoustic scanner configured to perform a high-resolution scan of the battery cell; and one of confirm that the battery cell is defective or to determine that the battery cell is defect-free.
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