Battery End Cover Assembly for Cover Plate Rotation Locking
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Solution Overview
Problem
The structural stability of battery cells with combined housings connected via an end cover is compromised due to relative rotation between cover plates, leading to potential leakage and safety issues, especially under lateral shear forces.
Innovation Solution
An end cover assembly with an anti-rotation device, including a connecting post and insulating members, is introduced to prevent relative rotation between cover plates, enhancing torsion resistance and structural stability without adding new components, thereby reducing weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an end cover with integrated structure is used to connect two housings, then the battery cell can be assembled with combined housings, but relative rotation between cover plates occurs leading to reduced structural stability
Solution Approach 1:
The patent introduces anti-rotation structures with asymmetric geometric features (such as protrusions and corresponding recesses) on the cover plates. These asymmetric features prevent relative rotation between the first and second cover plates by providing mechanical interlocking that allows assembly in only one orientation, thereby resolving the rotational instability issue while maintaining the combined housing structure
Solution Approach 2:
The anti-rotation structures are pre-integrated into the cover plate designs before assembly. The geometric features (protrusions, recesses, or non-circular shapes) are built-in during manufacturing, so that when the cover plates are assembled, the anti-rotation function is automatically activated without requiring additional components or steps, thus preventing relative rotation from the outset
2Stability of the object's composition
If anti-rotation devices are added to prevent relative rotation between cover plates, then structural stability is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the anti-rotation function with the existing cover plate structures by integrating geometric features directly into the cover plates themselves. Instead of adding separate anti-rotation components, the anti-rotation capability is combined with the cover plate design, eliminating the need for additional devices and reducing overall assembly complexity while maintaining structural stability
Solution Approach 2:
The cover plates are designed to serve multiple functions: they provide structural closure for the housings, enable electrical connections through integrated terminals, and prevent relative rotation through built-in anti-rotation geometric features. This multi-functionality eliminates the need for separate anti-rotation devices, reducing component count and assembly complexity while achieving the desired structural stability
Data Source
AI summary
An end cover assembly includes a first cover plate, a second cover plate and an anti-rotation device. The first cover plate is configured to close a first housing, the second cover plate is configured to close a second housing, the second cover plate and the first cover plate are arranged opposite to each other in a first direction, and the anti-rotation device is configured to prevent a relative rotation between the first cover plate and the second cover plate. The battery cell includes the end cover assembly.