Battery Cell Alignment Hole Structure for Precise Layer Positioning
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Solution Overview
Problem
The positioning of insulating and separation structures in battery cells is difficult due to manufacturing errors causing misalignment of through holes, making it challenging to achieve precise alignment using conventional positioning structures.
Innovation Solution
The design incorporates through holes in the insulating and separation structures with varying cross-sectional areas, including alignment holes larger than corresponding first holes, allowing multiple positioning structures to compensate for manufacturing errors and enhance alignment precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional positioning structures with identical through holes are used in insulating and separation structures, then the structure is simple to manufacture, but manufacturing errors cause misalignment making positioning difficult
Solution Approach 1:
The patent applies asymmetry by making the cross-sectional areas of through holes different between the insulating structure and separation structure. Specifically, the through holes in one structure have larger cross-sectional areas than the corresponding through holes in the other structure, creating an asymmetric relationship that compensates for manufacturing errors and facilitates positioning.
Solution Approach 2:
The patent applies local quality by varying the cross-sectional area of through holes at different locations. The alignment through holes have larger cross-sectional areas to accommodate positioning structures and compensate for misalignment, while other through holes have smaller cross-sectional areas for their specific functions, creating localized quality differences throughout the structure.
2Reliability
If multiple positioning structures are used to compensate for manufacturing errors, then positioning effectiveness is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the cross-sectional area parameter of through holes. By changing the size parameter of the through holes (making them larger in one structure compared to the other), the positioning reliability is improved without requiring complex positioning mechanisms, as the size parameter itself provides the compensation for manufacturing errors.
Solution Approach 2:
The patent applies segmentation by dividing the through holes into different types: alignment through holes with larger cross-sectional areas for positioning purposes, and other through holes with smaller cross-sectional areas for their specific functions. This segmentation allows the positioning function to be separated from other functions, improving positioning reliability while maintaining overall structural simplicity.
Data Source
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AI summary
The present application is applicable to the technical field of batteries, and provides a battery cell, a battery, and an electrical apparatus. The battery cell comprises a shell, an electrode assembly, an insulating structure, and a separation structure. The shell has an inner cavity, and the shell has a first wall; the electrode assembly is provided in the inner cavity; both the separation structure and the insulating structure are provided between the electrode assembly and the first wall; one of the insulating structure and the separation structure is provided with at least two first through holes, and the other is provided with second through holes respectively corresponding to the first through holes; the second through holes comprise an alignment hole, and the cross-sectional area of the alignment hole is greater than that of the corresponding first through hole, or the cross-sectional area of the alignment hole is greater than that of other second through holes. Since the battery cell provided in the present application is provided with the alignment hole, at least two positioning pins may be inserted between the insulating structure and the separation structure for positioning, resulting in more effective positioning.