Laminated Electrode Resin Layer Curing for Precise Flow Control
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Solution Overview
Problem
Existing methods for forming resin layers on the side surfaces of laminated electrode bodies in power storage devices struggle to accurately control the flow of resin material, leading to inaccurate placement and potential overflow, especially when forming around current collecting terminals.
Innovation Solution
A manufacturing apparatus and method using a resin filling mold with light radiation devices to photo-cure the resin at predetermined positions, employing light-transmittable molds and light-shielding bodies to control resin flow and prevent unintended curing, allowing for precise resin layer formation on the side surfaces of laminated electrode bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resin material is supplied to the side surface of the laminated electrode body using a mold, then a resin layer can be formed to improve rigidity and provide barrier protection, but it becomes difficult to accurately control the flow of resin material, leading to inaccurate placement and potential overflow
Solution Approach 1:
The patent replaces the conventional mechanical curing method with photo-curing technology. A light radiation device irradiates ultraviolet light to cure the photo-curing resin at predetermined positions during the flow process, enabling precise control of resin placement without relying solely on mechanical flow control mechanisms. This substitution allows the resin to be cured in situ at specific locations, preventing overflow and ensuring accurate layer formation.
Solution Approach 2:
The patent employs light-shielding bodies positioned at predetermined locations to control the flow of resin material in advance. These shielding bodies prevent the resin from flowing beyond desired boundaries before curing occurs, ensuring that the resin layer is formed only at the intended positions on the side surfaces of the laminated electrode body.
2Manufacturing precision
If light radiation is applied to cure the photo-curing resin, then precise resin layer formation is achieved, but light scattering may cause unintended curing at wrong positions
Solution Approach 1:
The patent introduces light-shielding bodies as intermediary elements between the light radiation device and the resin material. These shielding bodies selectively block ultraviolet light from reaching certain areas, preventing unintended curing of the resin at positions where it should not be formed. This intermediary structure ensures that curing occurs only at the intended locations where the light can directly reach the resin.
Solution Approach 2:
The patent applies different properties to different parts of the mold structure. The mold includes light-transmittable portions at positions where resin layer formation is desired and light-shielding portions at positions where resin layer formation should be prevented. This local differentiation of optical properties ensures that the resin is cured only at the correct positions, maintaining high precision in resin layer placement.
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
Enables accurate and stable formation of resin layers at predetermined positions, preventing overflow and ensuring precise resin layer placement, even around current collecting terminals, thereby enhancing the manufacturing efficiency and quality of power storage devices.
Implementation Method 1
a light radiation device configured to radiate light which photo-cures the photo-curing resin supplied to an internal space of the resin filling mold
Implementation Method 2
when front parts of the photo-curing resin supplied to the internal space that flow along the side surfaces of the electrode body reach predetermined positions
Data Source
AI summary
A manufacturing apparatus of a power storage device includes a resin filling mold configured to form an internal space that houses a laminated electrode body and to supply photo-curing resin used for forming a resin layer on at least a side surface on a long side of the laminated electrode body. The mold includes an upper mold, a lower mold, and two side surface molds on the long sides. Further, the manufacturing apparatus includes a light radiation device that radiates light which photo-cures the photo-curing resin supplied to the internal space. The manufacturing apparatus is configured to, when a front part of the supplied photo-curing resin that flows along the side surface reaches a predetermined position of the side surface, cure the flowing front parts by radiating the light from the light radiation device and stop the flowing front part from flowing along the side surface.