Battery Cell Lead-Out Layout for Extrusion-Resistant Connections
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Solution Overview
Problem
Battery cells face challenges in anti-extrusion capability, leading to reduced service life and increased volume due to parallel electrode lead-out components being prone to insertion and extrusion forces during manufacturing and use.
Innovation Solution
Inclining the connection surfaces of electrode lead-out components and using an adapter sheet with compressible portions to decompose extrusion forces perpendicular to the arrangement direction, thereby alleviating pressure on the components and improving the anti-extrusion capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode lead-out components are arranged parallel to each other for electrical connection, then the electrical connectivity is ensured, but the components are prone to insertion and extrusion forces during manufacturing and use, reducing service life
Solution Approach 1:
The patent applies asymmetry by changing the arrangement of electrode lead-out components from parallel to inclined relative to the battery cell arrangement direction. This asymmetric configuration transforms the force distribution, converting direct extrusion forces into components that are partially perpendicular to the lead-out direction, thereby reducing the harmful insertion and extrusion effects on the components.
Solution Approach 2:
The patent introduces a dimensional change by arranging electrode lead-out components at an inclination angle rather than parallel to the battery cell arrangement direction. This creates a spatial relationship where the lead-out components extend in both the arrangement direction and a perpendicular direction, effectively distributing forces across multiple dimensions and reducing concentrated extrusion stress.
2Device complexity
If the electrode lead-out components are arranged parallel to each other, then the structure is simple, but the length of components increases occupying more space, reducing energy density
Solution Approach 1:
The asymmetric inclined arrangement allows the electrode lead-out components to share space more efficiently. By extending at an angle rather than parallel, the components utilize three-dimensional space more effectively, reducing the overall length required in the battery cell arrangement direction while maintaining electrical connectivity.
Solution Approach 2:
The patent utilizes spatial optimization by arranging lead-out components in an inclined configuration that extends into a perpendicular dimension. This dimensional approach allows the components to achieve electrical connection with shorter lengths in the primary arrangement direction, thereby reducing the volume occupied within the battery cell.
Data Source
AI summary
A battery cell includes a case, a first battery cell, and a second battery cell, the first battery cell being arranged inside the case, the first battery cell including a first main body part and a first electrode lead-out component extending from a first side of the first main body part, the second battery cell being arranged inside the case, and the second battery cell including a second main body part and a second electrode lead-out component extending from a second side of the second main body part, wherein the first side of the first main body part and the second side of the second main body part are adjacent and arranged oppositely, the first electrode lead-out component includes a first connection surface inclined with respect to the first direction, and the second electrode lead-out component includes a second connection surface inclined with respect to the first direction.