All-Solid-State Battery Side Surface Resin Coating
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Solution Overview
Problem
The existing methods for coating all-solid-state batteries with resin result in increased battery volume, reducing energy density due to the difficulty of resin penetration into narrow clearances between protruding layers, leading to inefficient use of resin and increased battery size.
Innovation Solution
A manufacturing method and apparatus that supply a liquid resin only to the side surface of the battery, allowing it to penetrate into the clearances between protruding layers, while maintaining the end surfaces exposed, thereby enhancing energy density by minimizing resin usage and preventing volume increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dipping method or casting method is used to coat the laminated battery with resin, then the resin coating is achieved, but the volume of the laminated battery increases in the lamination direction, so that the energy density of the battery decreases
Solution Approach 1:
The invention segments the resin coating process by applying resin only to the side surface of the battery rather than the entire surface. The side surface is divided into regions above and below the protruding layers, with resin applied only in the region corresponding to the clearances between protruding layers, avoiding resin application on end surfaces and reducing overall resin volume.
Solution Approach 2:
The invention applies local quality by making the resin coating non-uniform: resin is applied only to specific locations (side surface region above protruding layers) where it is needed to fill clearances, while other regions (end surfaces, regions below protruding layers) remain without resin coating. This localized approach reduces total resin consumption and battery volume.
2Reliability
If a large amount of resin is supplied to the laminated battery, then the resin can potentially fill the narrow clearances, but the volume of the laminated battery increases, reducing the energy density
Solution Approach 1:
The resin supply is segmented to target only the specific region where clearances exist (side surface above protruding layers). By dividing the battery surface into regions that need resin and regions that don't, the invention supplies resin only where necessary, minimizing total resin amount while ensuring penetration into clearances.
Solution Approach 2:
The invention implements local quality by varying resin presence across different battery surfaces: high resin concentration in side surface regions above protruding layers (where clearances need filling), and zero resin on end surfaces and below protruding layers. This localized resin application reduces overall resin quantity while maintaining effective penetration.
3Reliability
If the resin is supplied to both end surfaces and side surface, then complete coating is achieved, but the energy density decreases due to increased battery volume
Solution Approach 1:
The invention segments the coating coverage by dividing the battery surface into coated and uncoated regions. Only the side surface region above protruding layers receives resin coating, while end surfaces and regions below protruding layers remain uncoated. This segmentation maintains adequate coating coverage for structural integrity while minimizing volume increase.
Solution Approach 2:
The invention applies local quality by creating non-uniform coating distribution: full resin coating only in the side surface region where clearances exist between protruding layers, and no coating on end surfaces. This localized approach provides sufficient coating coverage for reliability while reducing overall battery volume to maintain energy density.
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
The method effectively increases the energy density of all-solid-state batteries by allowing resin to penetrate into narrow clearances, reducing the need for extensive resin application and maintaining the structural integrity of the battery, resulting in a more compact and efficient energy storage solution.
Implementation Method 1
supplying the liquid resin to only the side surface of the laminated battery so that the liquid resin penetrates into a clearance between one protruding layer and another protruding layer
Data Source
AI summary
A manufacturing method for an all-solid-state battery includes: producing a laminated battery having both end surfaces in a lamination direction and a side surface by laminating pluralities of collector layers, positive electrode mixture layers, solid electrolyte layers, and negative electrode mixture layers; supplying a liquid resin to only the side surface of the laminated battery; and curing the liquid resin. Producing the laminated battery by protruding at least one layer of the collector layer, the positive electrode mixture layer, the solid electrolyte layer, and the negative electrode mixture layer relative to remaining of the layers to form a protruding layer. Protruding a plurality of protruding layers from the side surface of the battery. Supplying the resin involves supplying the liquid resin to only the side surface of the laminated battery such that the liquid resin penetrates into a clearance between one protruding layer and another protruding layer.