Battery Pole Structure Geometry for Stable Cell Connection
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Solution Overview
Problem
The structural form of the pole structure in batteries often hinders convenient connection with the cell, leading to assembly inefficiencies, increased risks of short circuits, and instability in the connection, which affects the battery's safe use performance.
Innovation Solution
The battery design includes a pole structure with an end face area S1 that protrudes from the battery housing through a pole through hole with an area greater than or equal to S1, and a size a1 that facilitates connection, ensuring a creepage distance and reducing stress concentration, thereby improving assembly efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pole structure uses a conventional structural form, then the battery structure is simple, but the connection between the pole structure and the cell is inconvenient and unstable
Solution Approach 1:
The pole structure transitions from a planar configuration to a three-dimensional structure by protruding from the battery housing inner surface toward the cell. This dimensional change enables the pole structure to extend into the space between the housing and cell, facilitating direct and stable electrical connection with the cell terminal without requiring complex external connection mechanisms.
Solution Approach 2:
The pole structure is pre-configured with a specific protruding dimension (a1) and end face area (S1) during manufacturing, establishing the optimal geometric relationship with the cell before assembly. The ratio S1/a1 is controlled within 7-19000 mm to ensure proper connection geometry, eliminating the need for complex adjustment mechanisms during assembly.
2Reliability
If the pole structure protrudes more from the battery housing, then the connection stability with the cell improves, but the risk of short circuit increases
Solution Approach 1:
The protruding dimension a1 of the pole structure is precisely controlled within specific ranges to optimize the balance between connection stability and short circuit prevention. By adjusting this geometric parameter, the pole structure achieves sufficient protrusion for reliable cell connection while maintaining adequate clearance from the cell body to prevent short circuits.
Solution Approach 2:
The pole structure exhibits non-uniform geometry with a specific end face area S1 concentrated at the protruding tip. This local concentration of conductive surface area ensures stable electrical connection with the cell terminal while the tapered or controlled geometry reduces the overall protrusion volume, minimizing the risk of contact with the cell body and preventing short circuits.
3Strength
If the pole structure has a larger end face area, then the electrical connection area with the cell increases, but the stress concentration after connection increases
Solution Approach 1:
The pole structure geometry is optimized to distribute mechanical stress dynamically across its volume. The relationship between end face area S1 and protruding dimension a1 creates a stress-distributing configuration where the connection interface has sufficient area for electrical contact while the underlying structure gradually transitions to the housing, preventing stress concentration at any single point.
Data Source
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AI summary
A battery, including: a cell (10); a pole structure (20) electrically connected to the cell (10), wherein an area of an end face (22), facing the cell (10), of the pole structure (20) is S1; and a battery housing (30), wherein the cell is provided in the battery housing (30), the battery housing is provided with a pole through hole (31), at least a part of the pole structure (20) penetrates through the pole through hole (31) inside, and an area of the pole through hole (31) is greater than or equal to S1, wherein one end, facing the cell (10), of the pole structure (20) is provided protruding from an inner surface (32) of the battery housing (30), a size, protruding from the inner surface (32), of the pole structure (20) is a1, and S1/a1 is 7 mm-19000 mm.