Battery Cover Plate Assembly With Pole Support and Pressure Relief
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Solution Overview
Problem
Batteries face issues with structural instability and safety due to displacement of poles under external pressure, leading to disconnection of current collectors and potential explosion risks.
Innovation Solution
A cover plate assembly with a recessed design and explosion-proof valve system that supports the pole, ensuring stability and safety by allowing pressure relief through a secondary through hole when internal pressure exceeds safe limits.
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 functionally distinct. The carrier portion provides dedicated support for the pole, while the cover plate body provides the explosion-proof function. This segmentation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
The carrier portion acts as an intermediary component between the pole and the cover plate body. It provides the necessary support and positioning for the pole, mediating the connection between the pole and the overall cover plate structure, thereby preventing direct displacement of the pole under external pressure.
2Device complexity
If a through hole is defined in the cover plate for the pole, then the assembly is simple, but the battery lacks explosion-proof protection when internal pressure exceeds safe limits
Solution Approach 1:
The cover plate is divided into a cover plate body with an explosion-proof through hole and a carrier portion that supports the pole. This segmentation allows the cover plate body to maintain explosion-proof protection while the carrier portion provides pole support, eliminating the need for additional through holes in the cover plate itself.
Solution Approach 2:
The support function for the pole is extracted from the cover plate body and assigned to a separate carrier portion. This extraction allows the cover plate body to focus on its primary function of providing explosion-proof protection, while the carrier portion handles the mechanical support of the pole.
3Volume of stationary object
If the pole lacks support at the end close to the inside of the battery, then the internal space is maximized, but the pole displaces under external pressure, causing disconnection of the current collector
Solution Approach 1:
The support structure is added in a different dimension - the carrier portion extends from the cover plate body to provide support at the pole end close to the battery inside. This dimensional addition provides necessary support without significantly compromising the internal space of the battery.
Data Source
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AI summary
A cover plate assembly, a battery, a method for assembling a battery, and an electricity-consumption device are provided. The cover plate assembly is applied to a battery, and includes a cover plate, a pole, and an explosion-proof assembly. The cover plate includes a cover plate body and a carrier portion connected with each other. The cover plate body has a first surface and a second surface opposite to each other. The cover plate body is disposed around an external periphery of the carrier portion. The carrier portion is recessed from the first surface. The carrier portion and the cover plate body cooperatively define a first recess. The carrier portion defines a first through hole communicating with the first recess. When the cover plate assembly is applied to the battery, the first surface is closer to an outside of the battery than the second surface. The pole is disposed in the first recess. The pole abuts against the carrier portion. The pole is configured to be electrically connected with a current collector of the battery. The pole defines a second through hole. The explosion-proof assembly includes an explosion-proof valve and a protective sheet. The explosion-proof valve and the protective sheet are disposed in the second through hole. The explosion-proof valve is spaced apart from the protective sheet. The explosion-proof valve is disposed closer to the second surface than the protective sheet. The explosion-proof valve is configured to seal the second through hole. The cover plate assembly has good structural stability.