Laminated Battery Comb Electrode Structure for Position Accuracy
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Solution Overview
Problem
Conventional lithium ion solid battery manufacturing methods face challenges in maintaining the position accuracy of electrode composite material portions, leading to displacement issues, reduced yield, and compromised safety and durability due to the complexity of the manufacturing process.
Innovation Solution
The method involves producing positive and negative electrode structures in comb shapes with electrode composite material layers positioned in advance, allowing for a laminated structure where the electrode composite material portions are not displaced, by alternately folding the sheets to form comb-shaped structures that fit together, simplifying the manufacturing process and improving yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrode sheets are cut to desired sizes and laminated alternately, then the battery structure can be formed, but the electrode composite material portions are displaced due to thickness differences between tab welded portions and electrode composite material portions
Solution Approach 1:
The patent applies preliminary action by pre-positioning the electrode composite material layers on the current collector before lamination. The electrode composite material is coated on both surfaces of the current collector foil to manufacture an electrode sheet, ensuring that the material layers are already in their correct positions before the lamination process begins. This prevents displacement during subsequent assembly steps.
Solution Approach 2:
The patent segments the electrode structure into distinct components: current collector foil, electrode composite material layers, and tab welded portions. By treating these as separate elements that can be independently prepared and then assembled, the patent maintains position accuracy while managing the complexity of the manufacturing process.
2Reliability
If press molding is performed at high surface pressure to improve adhesion of laminated interfaces, then the battery performance is improved, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The patent applies parameter changes by optimizing the coating thickness and material composition of the electrode composite material layers. By carefully controlling these parameters during the coating process, the patent achieves sufficient adhesion at the laminated interfaces without requiring excessive press molding pressure, thereby improving manufacturing efficiency while maintaining reliability.
3Quantity of substance
If the number of lamination layers is increased to increase capacity, then the battery capacity is improved, but the electrode composite material portions are more likely to be displaced
Solution Approach 1:
The patent applies continuity of useful action by ensuring that the electrode composite material layers are continuously coated on the current collector surfaces throughout the electrode sheet. This continuous coating structure maintains position accuracy even when multiple layers are laminated, allowing the battery capacity to be increased by adding more layers without sacrificing manufacturing precision.
Data Source
AI summary
The disclosure provides a laminated battery that can realize a laminated structure in which electrode composite material portions are not displaced, can simplify the manufacturing process, and has improved production yield, and provides a manufacturing method thereof. A positive electrode structure and a negative electrode structure in comb shapes are respectively produced with electrode composite material layers positioned in advance, and these are fitted to produce a laminate serving as a battery.