Battery Formation Defect Detection via Pressurized Voltage Patterns
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Solution Overview
Problem
Current methods for detecting defects in batteries during the formation process are inefficient, requiring long periods of time and reducing overall productivity.
Innovation Solution
A method and system that pressurize battery cells during the formation process to quickly stabilize voltage patterns, allowing for defect detection within a short time frame by analyzing voltage differences in microvoltage ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional defect detection methods are used in battery formation process, then detection accuracy is maintained, but detection time is excessively long which reduces productivity
Solution Approach 1:
The patent applies preliminary action by performing pressurization treatment on battery cells before the standard formation process. This pre-treatment accelerates the stabilization of voltage patterns, enabling defect detection to be performed much earlier in the manufacturing process. The pressurization is applied to cells in a charged state, causing immediate changes in voltage patterns that reveal defects without requiring extended waiting periods.
Solution Approach 2:
The patent utilizes parameter changes by altering the physical state of battery cells through pressurization. By applying pressure to charged battery cells, the voltage patterns change in a way that quickly stabilizes and reveals defects. This parameter change (pressure application) transforms the detection process from a time-consuming waiting period into an accelerated measurement process that can be completed in minutes rather than days.
2Measurement precision
If conventional defect detection methods are used, then comprehensive analysis is performed, but the process requires extended time periods exceeding 1 day
Solution Approach 1:
The pressurization treatment serves as a preliminary action that prepares the battery cells for rapid detection. By applying pressure before the measurement phase, the voltage patterns are forced into a stabilized state that can be analyzed quickly. This preliminary treatment eliminates the need for extended natural stabilization periods while maintaining the precision required for accurate defect detection.
Solution Approach 2:
The patent applies the skipping principle by rushing through the traditionally time-consuming stabilization phase. Instead of allowing battery cells to naturally stabilize over extended periods, the pressurization treatment forces rapid stabilization, enabling the detection process to skip the lengthy waiting period and proceed directly to precise voltage pattern analysis within minutes.
3Speed
If rapid detection methods are implemented, then detection speed increases, but detection accuracy and performance may deteriorate
Solution Approach 1:
The pressurization treatment creates specific parameter changes in the battery cells that enable both rapid detection and high reliability. The applied pressure causes distinct voltage pattern changes in defective cells versus normal cells, creating clear differentiation signals. This parameter change ensures that even with shortened detection time, the voltage patterns provide sufficient information for reliable defect identification with high accuracy.
Solution Approach 2:
The patent replaces the traditional time-based detection mechanism with a pressure-based mechanism. Instead of relying on extended time periods for voltage patterns to naturally stabilize and reveal defects, mechanical pressurization is applied to force rapid stabilization. This substitution of the detection mechanism (from time-dependent to pressure-dependent) maintains detection reliability while dramatically increasing detection speed.
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
This approach significantly reduces the time required for defect detection, enhances detection performance, and improves the overall efficiency and productivity of the battery manufacturing process.
Implementation Method 1
a measurement operation of pressurizing a battery cell and measuring a voltage of the battery cell under pressurization
Data Source
AI summary
A method for detecting a defect of a battery in a battery formation process according to an embodiment of the present disclosure, comprising: a measurement operation of pressurizing a battery cell and measuring a voltage of the battery cell under pressurization in the battery formation process; and an analysis operation of analyzing a difference between a pattern of the voltage and a reference pattern and detecting a defect in the battery cell based on an analysis result, wherein the analysis operation includes analyzing the difference between the pattern of the voltage and the reference pattern in a time range of less than 1 day and in a voltage range of less than 1 mV.