Battery Lead-Out Layout for Higher Capacity and Conductivity
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Solution Overview
Problem
In batteries, the close proximity of positive and negative electrode lead-out pieces reduces the size of the electrode core, thereby decreasing the battery's capacity due to the occupied internal space.
Innovation Solution
The battery design ensures sufficient conductivity by positioning the positive and negative electrode lead-out pieces with a specific distance (0.95≤L1/L≤0.99) within the battery casing, allowing for efficient use of space and maintaining conductivity, with the lead-out pieces' thickness ranging from 0.6 mm to 2 mm and their connection sheets parallel to the casing's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the positive and negative electrode lead-out pieces are positioned close to each other inside the battery casing, then the space occupation is reduced, but the conductivity is insufficient
Solution Approach 1:
The patent positions the positive and negative electrode lead-out pieces at opposite ends of the battery casing along the length direction, utilizing the longitudinal dimension to maximize separation distance. This dimensional arrangement ensures sufficient conductivity while efficiently using the available space within the battery casing.
2Reliability
If the lead-out pieces occupy more space inside the battery casing, then the conductivity is improved, but the electrode core size is reduced
Solution Approach 1:
The patent extracts the lead-out pieces from the internal space of the battery casing and positions them at the opposite ends along the length direction. This extraction approach allows the lead-out pieces to maintain sufficient conductivity without occupying valuable internal space that would otherwise be available for the electrode core.
3Reliability
If the distance between lead-out pieces is increased, then the conductivity is improved, but the battery length is increased
Solution Approach 1:
The patent utilizes the full length dimension of the battery casing to position the lead-out pieces at opposite ends, making the length direction serve dual purposes: ensuring sufficient conductivity through maximum separation while simultaneously defining the overall battery dimensions. This multi-functional use of the length direction optimizes both conductivity and compactness.
Data Source
AI summary
A battery, a battery pack, and a vehicle. The battery comprises: a battery casing; a pole core, arranged in the battery casing; and a positive electrode lead-out piece and a negative electrode lead-out piece, the positive electrode lead-out piece comprising a positive-electrode first connecting sheet, the negative electrode lead-out piece comprising a negative-electrode first connecting sheet, and the positive-electrode first connecting sheet and the negative-electrode first connecting sheet being distributed at two opposite ends of the pole core in the length direction of the battery casing. The distance between the positive-electrode first connecting sheet and the negative-electrode first connecting sheet in the length direction of the battery casing is L1, the size of the battery in the length direction of the battery casing is L, and L1 and L meet: 0.95≤L1/L≤0.99.