Electrode Assembly Voltage Monitoring for Short-Circuit Detection
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Solution Overview
Problem
Current methods for identifying short circuits in lithium-ion electrode assemblies are inefficient, costly, and unreliable, often requiring disassembly and relying on subjective human judgment, which can lead to safety hazards and errors.
Innovation Solution
A method and apparatus that monitor voltage at preset sampling time points during charging, detecting continuous voltage drops to determine if a short circuit is present, eliminating the need for disassembly and reducing reliance on human judgment, with a battery management system that acquires and analyzes voltage data to identify short circuits quickly and accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode assembly is disassembled to visually judge lithium precipitation, then the short circuit identification can be performed, but the implementation cost increases and efficiency decreases
Solution Approach 1:
The patent replaces the mechanical disassembly process with an electrical measurement system. By monitoring voltage changes during charging, the system can detect short circuits without physically disassembling the electrode assembly, thus maintaining identification reliability while dramatically improving efficiency and reducing labor costs
Solution Approach 2:
The patent introduces voltage as an intermediary parameter to indirectly detect short circuits. Instead of directly observing lithium precipitation through disassembly, the system uses voltage monitoring during charging as a mediator to infer the presence of short circuits, achieving non-invasive detection
2Reliability
If the electrode assembly is disassembled for visual judgment, then short circuit identification can be achieved, but safety hazards increase due to disassembly
Solution Approach 1:
The patent replaces mechanical disassembly with electrical measurement, eliminating the safety hazards associated with opening and handling battery components. The voltage monitoring method allows detection of short circuits while the battery remains intact and safe
3Reliability
If human experience judgment is used to assess lithium precipitation, then short circuit identification can be performed, but errors occur due to subjective judgment
Solution Approach 1:
The patent replaces subjective human judgment with objective electrical measurement. By using voltage monitoring and automated analysis algorithms, the system eliminates human error and subjectivity, providing consistent and accurate short circuit identification based on measurable electrical parameters
Solution Approach 2:
The patent implements a feedback mechanism where voltage data during charging is continuously monitored and analyzed. The system compares actual voltage behavior against expected charging curves to automatically detect deviations indicating short circuits, providing objective and repeatable identification without human intervention
Data Source
AI summary
An electrode assembly short circuit identification method includes: during charging, according to preset sampling time points, sequentially acquiring a voltage of an electrode assembly at each of the sampling time points; judging whether the electrode assembly has a continuous voltage drop according to the voltage acquired at each of the sampling time points; and determining whether the electrode assembly has a short circuit according to a judgment result.