Lithium Battery Electrode Conductivity Screening for Additive Content
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Solution Overview
Problem
The existing methods for manufacturing lithium secondary battery electrodes are time-consuming and costly, requiring the production of secondary battery cells to accurately evaluate the output properties, which is inefficient for determining the optimum content of conductive agents.
Innovation Solution
A method for designing and manufacturing lithium secondary battery electrodes involves measuring the electrical conductivity of electrodes using an alternating current with a broadband dielectric spectrometer to determine if an electrical path is properly formed, allowing for the determination of the optimal content of conductive agents without manufacturing a full battery cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a secondary battery cell is manufactured to evaluate output properties, then the evaluation accuracy is improved, but the time and cost consumption increases
Solution Approach 1:
The patent uses broadband dielectric spectrometer measurements as a simplified copy or proxy for full battery cell testing. By measuring the electrode assembly directly without assembling complete battery cells, the invention creates a surrogate evaluation method that maintains essential measurement capabilities while eliminating unnecessary manufacturing steps, thus reducing time and cost while preserving evaluation accuracy
Solution Approach 2:
The invention extracts the electrode assembly from the complete battery cell structure for direct measurement. By taking out the electrode assembly and measuring it separately using broadband dielectric spectrometer, the patent eliminates the need to manufacture full battery cells for evaluation purposes, thereby reducing time and cost consumption while maintaining evaluation accuracy
2Measurement precision
If a secondary battery cell is manufactured to evaluate output properties, then the evaluation accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
The patent uses broadband dielectric spectrometer measurements as a simplified copy or proxy for full battery cell testing. By measuring the electrode assembly directly without assembling complete battery cells, the invention creates a surrogate evaluation method that maintains essential measurement capabilities while eliminating unnecessary manufacturing steps, thus reducing time and cost while preserving evaluation accuracy
Solution Approach 2:
The invention extracts the electrode assembly from the complete battery cell structure for direct measurement. By taking out the electrode assembly and measuring it separately using broadband dielectric spectrometer, the patent eliminates the need to manufacture full battery cells for evaluation purposes, thereby reducing time and cost consumption while maintaining evaluation accuracy
3Reliability
If the content of conductive agent is increased, then the electrical conductivity is improved, but the determination of optimum content becomes more complex
Solution Approach 1:
The patent replaces complex manual evaluation methods with automated broadband dielectric spectrometer measurements. By using frequency-dependent AC conductivity measurements, the invention substitutes subjective or complex analytical processes with an objective, instrument-based system that automatically determines optimum conductive agent content through frequency response analysis
Solution Approach 2:
The invention changes the measurement parameter from DC conductivity to frequency-dependent AC conductivity. By measuring conductivity at different frequencies and analyzing the transition from DC to AC behavior, the patent creates a new parameter space that simplifies the determination of optimum conductive agent content, making the evaluation process more straightforward and less complex
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 method enables the simple determination of electrode composition by assessing electrical conductivity, reducing the time and cost associated with evaluating electrode performance and optimizing conductive agent content.
Implementation Method 1
measuring the electrical conductivity of an electrode with an alternating current to determine whether an electrical path in the electrode has been appropriately formed
Implementation Method 2
applying an alternating current to each of the plurality of electrodes manufactured above while changing a frequency
Data Source
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AI summary
Provided are a method for designing an electrode for a lithium secondary battery comprising measuring the electrical conductivity of an electrode with an alternating current to determine whether an electrical path in the electrode has been appropriately formed, and a method for manufacturing an electrode for a lithium secondary battery comprising the same. According to the present invention, it is possible to determine the content of a conductive agent in the electrode using the same.