Battery Cell Terminal Layout for Faster Formation Assembly
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Solution Overview
Problem
The existing battery cell production process has an improper cycle time, leading to low production efficiency and increased manufacturing costs due to the need for secondary positioning of terminal posts during the formation process.
Innovation Solution
The battery cell design features terminal posts with specific radial spacing and annular contact structures, allowing for distinct positioning without secondary adjustments, facilitating efficient assembly and reducing material waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If terminal posts are positioned symmetrically on the wall portion, then the structure is simple and easy to manufacture, but secondary positioning is required during the formation process which increases cycle time and reduces production efficiency
Solution Approach 1:
The patent applies asymmetry by positioning the first terminal post at a first distance from the central axis and the second terminal post at a second distance from the central axis, where the first distance is different from the second distance. This asymmetric arrangement eliminates the need for secondary positioning during the formation process, as the terminal posts are already in their correct positions after initial assembly, thereby reducing cycle time and improving production efficiency while maintaining ease of manufacture.
2Productivity
If terminal posts are positioned at different distances from the central axis, then secondary positioning is eliminated and production efficiency is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by creating distinct local characteristics for each terminal post position. The first terminal post is positioned at a specific distance from the central axis corresponding to a first polarity, and the second terminal post is positioned at a different distance corresponding to a second polarity. This localized differentiation simplifies the formation process by eliminating the need for secondary positioning, as each terminal post's position is optimized for its specific function, thereby improving production efficiency without introducing unnecessary overall complexity.
3Ease of operation
If symmetric positioning of terminal posts is used, then assembly is straightforward, but assembly errors occur during the formation process requiring repositioning
Solution Approach 1:
The patent applies asymmetry to eliminate assembly errors by positioning terminal posts at different distances from the central axis. The first terminal post is located at a first distance corresponding to a first polarity, and the second terminal post is located at a second distance corresponding to a second polarity. This asymmetric configuration provides unique positional identifiers for each terminal post, making it easy to distinguish between positive and negative terminals during assembly and the formation process, thereby improving manufacturing precision while maintaining ease of operation.
4Manufacturing precision
If secondary positioning of terminal posts is performed, then positioning accuracy is improved, but cycle time increases and production efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-positioning the terminal posts at their final correct locations during the assembly process. The first terminal post is positioned at a first distance from the central axis and the second terminal post is positioned at a second distance from the central axis, ensuring that no secondary positioning is needed during the formation process. This preliminary correct positioning eliminates time-consuming repositioning operations, thereby reducing cycle time and improving production efficiency while maintaining positioning accuracy.
Data Source
AI summary
The present application provides a battery cell, a battery, and a power consuming apparatus, and belongs to the field of battery technologies. The battery cell includes a shell, an electrode assembly, a first terminal post, and a second terminal post. The shell has a circular wall portion. The electrode assembly is accommodated in the shell. The first terminal post and the second terminal post have opposite polarities. The first terminal post and the second terminal post are spaced apart on the wall portion and are both electrically connected to the electrode assembly. A minimum distance between the first terminal post and a central axis of the wall portion is greater than a minimum distance between the second terminal post and the central axis of the wall portion in a radial direction of the wall portion.