Laminated Battery Cutting Layout for Precise Capacity Control
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Solution Overview
Problem
Conventional battery manufacturing methods fail to accurately produce batteries with target capacities due to variations in active material coating and density, leading to inconsistent battery performance.
Innovation Solution
A battery manufacturing method involving a laminate structure with alternating regions of active material layers and solid electrolyte layers, allowing for precise cutting to achieve desired capacity by adjusting cutting positions in each region, thereby controlling the amount of active material and ensuring high accuracy in battery capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional battery manufacturing methods are used, then production process is simple, but battery capacity precision is poor due to variations in active material coating and density
Solution Approach 1:
The electrode is divided into multiple regions along the coating direction, with each region having different active material coating amounts. This segmentation allows precise control of capacity distribution, enabling the battery to achieve target capacity with high precision despite variations in coating and density.
Solution Approach 2:
Different regions of the electrode are designed with different local qualities, specifically different active material coating amounts. The first region has a different coating amount compared to the second region, allowing each region to contribute differently to the overall capacity and enabling precise capacity control.
2Manufacturing precision
If intermittent coating method is used, then capacity control is improved, but manufacturing process complexity increases
Solution Approach 1:
The coating process is segmented into multiple zones along the coating direction, with each zone having a different coating amount. This is achieved by controlling the coating apparatus to deposit different amounts of active material in different regions, enabling precise capacity control while maintaining a relatively simple continuous coating process.
Solution Approach 2:
The coating amount parameter is varied along the coating direction to create regions with different active material densities. By changing the coating amount parameter in different zones, the invention achieves precise capacity control without requiring complex intermittent coating operations.
Data Source
AI summary
A manufacturing method of the present disclosure includes (A) obtaining a battery by cutting a long laminate in a lamination direction, the laminate including a first active material layer, a solid electrolyte layer, and a second active material layer that are disposed in this order. The laminate has a first region and a second region that are repeated alternately in a lengthwise direction, where the first active material layer is present in the first region and is not present in the second region in plan view in the lamination direction. In the (A), the laminate is cut in the first region and the second region so that the battery has a desired capacity.