Battery Cover Member Positioning for Precise Electrode Assembly
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Solution Overview
Problem
The positions of lids with respect to the electrode assembly in electrical storage devices may deviate during the manufacturing process due to movement of the intermediate body, leading to inaccuracies in the assembly.
Innovation Solution
The electrical storage device incorporates lids with protrusions or recessed portions that facilitate accurate positioning using a fixing jig, and a transport jig that includes plates and a coupling portion to maintain the electrode assembly's alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the intermediate body is moved to the next manufacturing workplace, then the manufacturing process can proceed, but the positions of the lids with respect to the electrode assembly may deviate
Solution Approach 1:
Positioning protrusions are formed on the lids before the intermediate body is moved to the next manufacturing workplace. These protrusions preliminarily establish the correct position, preventing deviation during transport and subsequent processing steps.
Solution Approach 2:
The positioning protrusions act as intermediary elements between the lids and the electrode assembly. They mediate the positioning relationship, ensuring that the lids maintain accurate positions relative to the electrode assembly even when the intermediate body is moved between workplaces.
2Manufacturing precision
If positioning protrusions are formed on the lids, then lid positioning accuracy is improved, but the lid structure becomes more complex
Solution Approach 1:
The positioning function is segmented from the main lid body. Positioning protrusions are formed as separate structural elements on the lids, allowing the positioning function to be added without fundamentally redesigning the entire lid structure. This modular approach minimizes overall complexity.
Solution Approach 2:
The positioning protrusions are localized features on specific areas of the lids rather than requiring changes to the entire lid structure. This local modification approach adds minimal complexity while achieving the positioning function where it is most needed.
Data Source
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AI summary
This power storage device is provided with an electrode body and an outer package in which the electrode body is sealed. The outer package comprises an outer package film which enfolds the electrode body in such a manner that an opening is formed, and a cover member which is disposed at the position of the opening. The cover member has a first surface that faces the electrode body, a second surface that is on the reverse side of the first surface, and a projection that protrudes from the second surface.