Electrolyte-Immersed Electrode Testing for Accurate Property Measurement
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Solution Overview
Problem
Existing methods for measuring the physical properties of electrodes and separators in secondary batteries fail to account for the softening effects of electrolyte impregnation, leading to inaccurate evaluations of battery performance.
Innovation Solution
A measuring apparatus that immerses the specimen in electrolyte, allowing for tests such as uniaxial and biaxial tensile tests and compression tests, using a container with a viewing window, grippers, and a camera unit to accurately measure physical properties under conditions simulating the actual battery environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specimens are tested in a dry state, then the testing process is simple and fast, but the measurement results do not reflect the actual physical properties of electrodes and separators in secondary batteries
Solution Approach 1:
The patent introduces an electrolyte container as an intermediary environment that immerses the specimen in electrolyte solution during testing. This mediator allows the specimen to be tested in a state that closely resembles its actual operating condition in a secondary battery, thereby improving measurement accuracy without requiring complex modifications to the fundamental testing mechanism
Solution Approach 2:
The patent changes the environmental parameter from dry state to wet state by immersing the specimen in electrolyte. This parameter change transforms the testing conditions to match the actual operating environment of battery components, enabling accurate measurement of physical properties such as tensile strength and compression resistance that are relevant to real battery performance
2Measurement precision
If specimens are immersed in electrolyte for testing, then the measurement accuracy improves, but the testing process becomes more complex and time-consuming
Solution Approach 1:
The patent performs preliminary action by pre-filling the container with electrolyte solution before placing the specimen for testing. This eliminates the need for time-consuming electrolyte impregnation steps during the actual testing process, as the specimen is already in the correct environmental state when placed in the testing apparatus
Solution Approach 2:
The testing apparatus is designed with multi-functionality, combining the testing mechanism with an integrated electrolyte container system. This universal design allows the same apparatus to perform both mechanical testing and environmental control functions, eliminating the need for separate pre-treatment equipment and reducing overall testing time
Data Source
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AI summary
A measuring apparatus for an electrode and/or a separator for a secondary battery according to one embodiment of the present disclosure includes a container including a body in which a specimen and an electrolyte can be stored inside, and a measuring unit for measuring physical properties of the specimen, wherein the specimen is at least one of an electrode and a separator for a secondary battery, and the measurement is performed under a state where the specimen is immersed with the electrolyte.