Shielded Battery Cell Cross-Section Analysis Under Inert Gas
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Solution Overview
Problem
Existing in-situ analysis methods for secondary batteries face challenges in preventing side reactions due to atmospheric exposure and humidity, and lack the ability to analyze the cross-section of the battery cell in real time during charging and discharging while adjusting pressure.
Innovation Solution
An atmospheric shielding type analysis device that isolates the battery cell from the atmosphere and maintains low humidity, allowing real-time analysis of the cross-section by loading the cell parallel to the ground, with adjustable pressure, using conductive wire members, mounting members, and gas inlet/outlet for inert gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery cell is exposed to the atmosphere during analysis, then the analysis can be performed with simple device structure, but side reactions occur due to humidity and atmospheric exposure
Solution Approach 1:
The patent implements an inert atmosphere environment within the analysis device by introducing inert gas (such as nitrogen or argon) through the gas inlet and maintaining a controlled atmosphere in the analysis chamber. This prevents side reactions between the battery cell components and atmospheric moisture or oxygen during in-situ analysis, while keeping the device structure relatively simple through the use of gas flow control rather than complex vacuum or sealed systems.
2Device complexity
If the battery cell is analyzed in traditional horizontal orientation, then the analysis setup is simple, but the interface analysis during charging and discharging cannot be performed in real time
Solution Approach 1:
The patent changes the orientation dimension of the battery cell from traditional horizontal stacking to a configuration where the battery cell is positioned with its stacking direction parallel to the ground, enabling the cross-section interface to be exposed and accessible for real-time analysis during charging and discharging cycles. This dimensional reorientation allows the analysis probe to access the interface region while maintaining a relatively simple overall setup.
3Device complexity
If the battery cell is analyzed without pressure adjustment capability, then the device structure remains simple, but cross-section analysis cannot be performed under different pressure conditions
Solution Approach 1:
The patent incorporates a pressure adjustment mechanism that allows the analysis chamber to operate under different pressure conditions. The gas inlet system can introduce inert gas at controlled pressures, and the chamber pressure can be adjusted dynamically during analysis. This provides versatility for analyzing the battery cell cross-section under various pressure conditions without significantly complicating the overall device structure, as the pressure control integrates with the existing gas flow system.
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
Prevents side reactions, enables real-time analysis of the battery cell interface during charging and discharging, and allows pressure-adjusted cross-section analysis, providing accurate data without distortion.
Implementation Method 1
a gas inlet formed through one side portion of one side wall of the body member and configured to provide gas into the inner space, and a gas outlet formed through one side portion of another side wall of the body member and configured to discharge the gas in the inner space to the outside
Data Source
AI summary
Disclosed is an atmospheric shielding type analysis device for a cross-section of a battery cell and an analysis method using the same. The device comprises 1) a body member comprising a bottom plate, a side wall, and an inner space partitioned by the bottom plate and the side wall; 2) a cover member; 3) a first conductive wire member penetrating one side wall of the body member; 4) a first mounting member comprising a first substrate having a shape of a plate and being coupled to an end of the first conductive wire member; 5) a second conductive wire member penetrating another side wall of the body member; 6) a second mounting member comprising a second substrate having a shape of a plate and being coupled to an end of the second conductive wire member; 7) a gas inlet; and 8) a gas outlet.