Recessed Battery Cover Plate Assembly for Pole Stability and Venting
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Solution Overview
Problem
Existing battery cover plate assemblies lack sufficient structural stability, leading to pole displacement under external pressure, which can cause disconnection of the current collector and disrupt electrical connections, resulting in unstable power supply and safety concerns.
Innovation Solution
A cover plate assembly with a recessed carrier portion and a pole that abuts against the carrier, featuring an explosion-proof assembly with a valve and protective sheet, providing structural support and pressure relief through intersecting sub-holes to maintain electrical connection and prevent explosions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pole is fixed by an injection process without additional support, then the manufacturing process is simple, but the pole is prone to displacement under external pressure, resulting in dislocation and disconnection of the current collector
Solution Approach 1:
The cover plate is segmented into a cover plate body and a carrier portion that are connected but can move relative to each other. The carrier portion can rotate about the pole, allowing the pole to be supported at multiple positions along its length, preventing displacement while maintaining manufacturing simplicity
Solution Approach 2:
The carrier portion is designed to be dynamically adjustable, capable of rotating about the pole to different positions. This dynamic capability allows the system to adapt to external pressures and maintain pole stability without requiring complex fixed support structures
2Stability of the object's composition
If the cover plate body is made larger to provide better support, then the pole stability improves, but the battery volume increases, affecting energy density
Solution Approach 1:
Instead of increasing the cover plate body size in all dimensions, the solution adds a rotational degree of freedom to the carrier portion. This allows the same cover plate dimensions to provide enhanced support by utilizing the rotational mechanism rather than increasing physical size
Solution Approach 2:
The carrier portion is nested within or integrated with the cover plate body structure. The abutting portion of the carrier fits within the cover plate body's recess, creating a compact nested arrangement that provides structural support without increasing overall battery volume
3Reliability
If the pole is constrained more rigidly to prevent displacement, then electrical connection stability improves, but the battery's ability to release internal pressure deteriorates
Solution Approach 1:
The carrier portion acts as an intermediary between the pole and the cover plate body. It provides support to the pole while allowing relative movement and rotation, thereby maintaining electrical connection stability without creating rigid constraints that would interfere with pressure release mechanisms
Data Source
AI summary
A cover plate assembly, a battery, and a method for assembling a battery are provided. The cover plate assembly includes a cover plate, a pole, and an explosion-proof assembly. The cover plate includes a cover plate body and a carrier portion. The cover plate body is disposed around an external periphery of the carrier portion. The carrier portion is recessed from a first surface of the cover plate body. The carrier portion and the cover plate body cooperatively define a first recess communicating with a first through hole defined by the carrier portion. The pole is disposed in the first recess. The pole abuts against the carrier portion. The explosion-proof assembly includes an explosion-proof valve and a protective sheet. The explosion-proof valve and the protective sheet are disposed in a second through hole defined by the pole. The explosion-proof valve is spaced apart from the protective sheet.