Laminated Battery Cell Stacking for Precise Capacity Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional laminated batteries face issues with battery capacity precision and reliability, particularly due to the tendency of thin unit battery cells to collapse and develop internal cracks during cutting, and the need for precise capacity adjustment to prevent overcharge and over-discharge.
Innovation Solution
A method for manufacturing laminated batteries involves measuring the characteristics of unit cells, such as charge and discharge characteristics and impedance, to adjust their areas through collective cutting, ensuring the battery capacity falls within a predetermined range, thereby enhancing precision and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If unit battery cells are cut individually to adjust area, then battery capacity precision can be improved, but the risk of collapse and internal cracks increases due to thin cell structure
Solution Approach 1:
Multiple unit battery cells are stacked together to form a stacked body before cutting. This merging approach provides mutual support among cells, preventing collapse and internal cracks during cutting while enabling precise area adjustment for battery capacity control.
2Productivity
If cutting speed is increased to improve productivity, then manufacturing efficiency improves, but cut surface quality deteriorates due to thin cell structure
Solution Approach 1:
By stacking multiple unit battery cells into a stacked body, the structure gains sufficient rigidity to withstand faster cutting speeds. This enables high productivity while maintaining excellent cut surface quality without the collapse issues that would occur with individual thin cells.
3Stability of the object's composition
If distributed pressure is applied to the periphery of laminated battery, then structural stability improves, but manufacturing complexity increases
Solution Approach 1:
Multiple unit battery cells are stacked together to form a stacked body, which inherently provides structural stability through mutual support. This self-stabilizing structure eliminates the need for complex distributed pressure application systems, simplifying the manufacturing process while maintaining structural integrity.
Data Source
AI summary
A method for manufacturing a laminated battery in which a plurality of unit battery cells each having a negative-electrode layer, a positive-electrode layer, and a solid electrolyte layer located between the negative-electrode layer and the positive-electrode layer are laminated, the method including: measuring respective characteristics of the plurality of unit battery cells; laminating the plurality of unit battery cells, the characteristics of the plurality of unit battery cells being measured; and on the basis of the respective characteristics of the plurality of unit battery cells laminated in the laminating, adjusting areas of the plurality of unit battery cells which are laminated by collectively cutting the plurality of unit battery cells which are laminated and thereby so that a battery capacity of the laminated battery falls within a predetermined range of value.