Elastic Pressure Pads for Uniform Pouch Cell Pressing
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Solution Overview
Problem
Existing battery cell pressing jigs made of inflexible materials fail to provide uniform pressure and effective outgassing, leading to uneven electrolyte distribution and reduced battery capacity, particularly in areas with beveled surfaces or near terminals.
Innovation Solution
The use of elastic pressure pads, which can be inflatable or made of materials like silicone, with varying thickness and internal structures to adapt to the battery cell's contour, ensuring uniform pressure and efficient gas removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inflexible pressing materials are used, then structural strength is maintained, but uniform pressure distribution and effective outgassing are compromised
Solution Approach 1:
The patent replaces inflexible pressing materials with flexible pressing elements that can conform to the pouch battery cell surface, including beveled areas and terminal regions. These flexible elements maintain sufficient structural strength while adapting to surface variations to ensure uniform pressure distribution and effective outgassing across the entire cell surface.
Solution Approach 2:
The patent changes the physical parameter of the pressing material from rigid to flexible, allowing the material to deform and conform to the battery cell surface geometry. This parameter change enables the pressing element to maintain contact with uneven surfaces while still providing the necessary pressing force for electrolyte distribution and gas removal.
2Force
If inflexible pressing materials are used, then pressing force can be applied, but outgassing efficiency and electrolyte distribution are reduced
Solution Approach 1:
The flexible pressing elements conform to the battery cell surface geometry, allowing pressing force to be effectively transmitted to all areas including beveled surfaces and terminal regions. This ensures complete contact and maximizes outgassing efficiency and electrolyte distribution while maintaining the necessary pressing force.
Solution Approach 2:
The patent applies pressing force with enhanced effectiveness in critical areas such as beveled surfaces and terminal regions where outgassing is most challenging. The flexible material allows local adaptation to surface variations, ensuring that pressing force is optimally distributed where it is most needed for effective gas removal and electrolyte penetration.
3Manufacturing precision
If uniform pressing is achieved across beveled surfaces, then battery capacity is maximized, but pressing material flexibility is required
Solution Approach 1:
The patent employs flexible pressing elements that can adapt to the varying geometry of pouch battery cells, including beveled surfaces and terminal areas. This flexibility enables the material to conform to surface variations and deliver uniform pressure distribution, achieving homogeneous electrolyte distribution and maximizing battery capacity.
Solution Approach 2:
The patent changes the material parameter from rigid to flexible, enabling the pressing element to adapt its shape and conform to the battery cell surface. This parameter change allows uniform pressure application across complex geometries, ensuring consistent electrolyte distribution and optimal battery performance.
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
Achieves homogeneous electrolyte distribution and maximizes battery capacity by uniformly pressing all areas, including beveled surfaces and terminal regions, enhancing the battery's service life and performance.
Implementation Method 1
the first and the second pressure pads are made of an elastic material
Data Source
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AI summary
The present invention relates to a battery cell pressing jig for manufacturing a battery cell, the battery cell pressing jig comprising: a first pressure pad configured to apply a uniform mechanical pressure to a first main outer surface of a pouch-type battery cell in a direction essentially perpendicular to the first main outer surface; a second pressure pad configured to apply a uniform mechanical pressure to a second main outer surface of the pouch-type battery cell in a direction essentially perpendicular to the second main outer surface, the first and second main outer surfaces of the pouch-type battery cell being opposite each other; wherein the first and the second pressure pads are made of an elastic material. The invention further relates to a battery cell manufacturing system.