Battery Cell Thermochromic Coating for Rapid Wear Detection
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Solution Overview
Problem
Conventional methods for identifying defective battery cells within a block are time-consuming and burdensome, requiring manual testing of each cell, which is inefficient especially when dealing with large numbers of cells.
Innovation Solution
Coating each battery cell with thermochromic material that changes color when its condition falls below a predetermined threshold, allowing for quick identification of defective cells through image capture and analysis by a battery management unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual testing of each battery cell is performed, then identification accuracy is improved, but time consumption and operational burden increase significantly
Solution Approach 1:
The patent applies color-changing materials (thermochromic, electrochromic, or liquid crystal materials) coated on battery cell exteriors that change color when the cell condition falls below a predetermined threshold. This allows defective cells to be visually identified without manual testing, resolving the contradiction by providing accurate identification through optical changes rather than time-consuming electrical testing.
Solution Approach 2:
The patent replaces manual mechanical testing procedures with an automated optical detection system using cameras and image processing algorithms. The system captures images of battery cells and automatically analyzes color changes to identify defective cells, eliminating the need for manual testing while maintaining identification accuracy.
2Measurement precision
If manual testing of each battery cell is performed, then identification accuracy is improved, but operational complexity and burden increase
Solution Approach 1:
The battery cells essentially self-identify their defective state through the color-changing materials on their exteriors. When a cell's condition deteriorates below the threshold, the material automatically changes color, making the cell's status self-evident without requiring external testing or manual intervention.
Solution Approach 2:
The patent replaces complex manual testing operations with simple visual inspection or automated image capture. The operational burden is reduced from performing electrical tests on each cell to simply observing color changes or capturing images for automated analysis.
3Productivity
If automated image capture and analysis is implemented, then processing speed is improved, but device complexity increases
Solution Approach 1:
The battery management unit is designed to perform multiple functions: monitoring electrical parameters of battery cells, capturing images of cell exteriors, analyzing color changes through image processing, and determining cell status. This multi-functional approach integrates complexity into a single system rather than requiring separate dedicated devices for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and automated detection of defective cells, simplifying the identification process and potentially extending the usability of batteries, while aiding in recycling.
Implementation Method 1
an exterior of each of the plurality of cells is coated with a thermochromic material designed to undergo a color change event responsive to a cell condition falling below a predetermined threshold
Data Source
AI summary
One embodiment provides a method, including: monitoring, using a battery management unit, a condition of one or more cells within a block of a battery, wherein the monitoring comprises capturing, using a camera associated with the battery management unit, an image of an exterior of the one or more cells; determining, using a processor, that the condition of at least one of the one or more cells has fallen below a predetermined threshold, wherein the determining comprises identifying that the exterior of the at least one of the one or more cells has undergone a color change event; and providing, responsive to the determining, a notification. Other aspects are described and claimed.