Conductive Roller Cell Insulation Defect Detection
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Solution Overview
Problem
Existing methods for detecting insulation defects in battery cells within a module are inadequate, as they fail to identify issues before assembly, leading to potential field problems and increased costs due to poor insulation performance.
Innovation Solution
A cell insulation defect detection system utilizing a contact unit with a conductive roller and a measurement unit to measure insulation resistance between the roller and the cell, allowing for pre-assembly inspection of individual cells using a rotation pressurization method to ensure accurate detection of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional insulation detection methods are used for battery modules, then the detection process is simple, but insulation defects of individual cells cannot be detected before assembly
Solution Approach 1:
The patent divides the battery module inspection into individual cell inspections. Each cell is detected separately using a conductive roller that contacts the cell surface, allowing insulation defects to be identified at the cell level rather than only at the module level. This segmentation enables precise localization of insulation defects to specific cells.
Solution Approach 2:
The patent implements preliminary inspection of individual cells before they are assembled into a battery module. The conductive roller detects insulation defects on cell surfaces prior to assembly, allowing defective cells to be identified and replaced early in the manufacturing process, preventing field failures.
2Reliability
If individual cell inspection is implemented, then insulation defects can be detected early, but the inspection process becomes more complex
Solution Approach 1:
The patent replaces complex electrical insulation testing equipment with a simple mechanical conductive roller system. The roller is driven by a motor to rotate and contact the cell surface, using mechanical friction to generate heat that detects insulation defects. This mechanical approach simplifies the manufacturing inspection process while maintaining reliability.
Solution Approach 2:
The patent changes the detection parameter from electrical resistance measurement to thermal response analysis. By applying mechanical friction heat through the conductive roller and monitoring temperature changes, the system detects insulation defects without requiring complex electrical testing equipment, making the process easier to manufacture and implement.
3Ease of manufacture
If insulation defects are detected after module assembly, then the detection method is straightforward, but correction costs increase and field issues occur
Solution Approach 1:
The patent performs insulation defect detection on individual cells before they are assembled into battery modules. By inspecting cells in advance using the conductive roller system, defective cells are identified and replaced during manufacturing rather than after assembly, preventing costly field failures and reducing waste of defective cells.
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 reliable detection of insulation defects in individual cells prior to module assembly, reducing costs and preventing field issues by identifying and addressing problems early on.
Implementation Method 1
a measurement unit configured to measure insulation resistance between the roller and the cell in contact with each other
Data Source
AI summary
The present disclosure relates to a battery cell, and more particularly, to a cell insulation defect detection system configured to detect insulation defects of individual cells forming a battery. The cell insulation defect detection system of the present disclosure comprises a contact unit comprising a conductive roller configured to contact a battery cell to be inspected, the battery cell being rotatably housed therein, and a measurement unit configured to measure insulation resistance between the roller and the cell in contact with each other.