Battery Cell Terminal Layout for Faster Formation Cycling
Find Innovative SolutionsGenerate Solutions
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 includes a shell with a circular wall portion where the first and second terminal posts, having opposite polarities, are spaced apart and located on different radii, allowing for an annular structure of probes to contact them separately, eliminating the need for secondary positioning and optimizing the cycle time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the terminal posts are positioned symmetrically on the wall portion, then the structural balance is improved, but the formation process requires secondary positioning 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 while maintaining structural stability, thereby improving production efficiency.
2Ease of manufacture
If the terminal posts are arranged to require secondary positioning, then the initial assembly is simplified, but the cycle time increases and manufacturing costs rise
Solution Approach 1:
The patent implements preliminary action by pre-positioning the terminal posts at different distances from the central axis during the initial assembly stage. This preliminary asymmetric positioning ensures that the terminal posts are correctly aligned for the formation process without requiring secondary positioning, thus reducing cycle time and manufacturing costs.
3Manufacturing precision
If the terminal posts are placed at different radii from the central axis, then the formation process accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent uses asymmetry to place terminal posts at different radii from the central axis, which improves formation process accuracy by eliminating the need for secondary positioning. The asymmetric design is simple to implement and does not significantly increase device complexity.
Data Source
Figure 1~2
Figure 3
Figure 4
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. The battery cell implements a structure in which the first terminal post surrounds the exterior of the second terminal post in an arc extension direction, so as to facilitate distinguishing and avoid errors in a formation process of the battery cell. The battery cell does not need to be secondarily positioned but a positive probe and a negative probe of a formation device are configured into an annular structure in which an outer ring surrounds an inner ring, thereby facilitating optimization of a cycle time of the battery cell.