Anti-explosion valve patch for battery, end cover assembly, battery, and electric apparatus
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Solution Overview
Problem
Existing anti-explosion valve patches for batteries face challenges in maintaining protection capability due to deformation issues, which can allow electrolyte to flow and corrode the anti-explosion valve, and may lead to misjudgment during air tightness detection.
Innovation Solution
An anti-explosion valve patch with a closed convex ring and reinforcing ribs, where the exhaust hole is located within or on the closed convex ring, preventing electrolyte flow and enhancing deformation resistance to maintain protection and detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the anti-explosion valve patch is made thin and flexible for easy installation, then the ease of operation is improved, but the deformation resistance deteriorates, allowing electrolyte to flow and corrode the valve
Solution Approach 1:
The valve patch is divided into multiple functional regions: a central exhaust hole region, surrounding closed convex rings, and outer reinforcing ribs. This segmentation allows each region to perform its specific function - the thin central area provides ease of installation while the thicker convex rings and ribs provide deformation resistance.
Solution Approach 2:
Different thickness and structural properties are applied to different locations of the valve patch. The closed convex rings and reinforcing ribs have greater thickness and structural rigidity to prevent deformation, while the central area around the exhaust hole remains thinner for flexibility and ease of installation.
2Productivity
If the exhaust hole is made larger for better venting, then the productivity is improved, but the reliability deteriorates as electrolyte can more easily flow in and cause corrosion
Solution Approach 1:
The closed convex rings act as an intermediary barrier between the exhaust hole and the surrounding electrolyte. These rings block electrolyte from directly contacting the exhaust hole edges and flowing inward, while still allowing gas to escape through the exhaust hole.
Solution Approach 2:
The closed convex rings and reinforcing ribs are pre-positioned around the exhaust hole to prevent electrolyte from reaching the exhaust hole and corroding the valve before corrosion can occur. This preliminary protective action maintains reliability while allowing large exhaust holes for productivity.
3Strength
If the valve patch material is made more resistant to deformation, then the strength is improved, but the manufacturing complexity increases due to processing difficulties
Solution Approach 1:
The valve patch is segmented into standardized components (convex rings, reinforcing ribs, exhaust hole region) that can be independently formed and then assembled. This segmentation simplifies manufacturing of each component while achieving the overall deformation resistance of the complete structure.
Solution Approach 2:
Multiple protective features (convex rings, reinforcing ribs, exhaust hole structure) are merged into a single integrated valve patch component. This combining reduces the number of separate parts to manufacture and assemble, simplifying the overall manufacturing process while maintaining high deformation resistance.
Data Source
AI summary
This disclosure provides an anti-explosion valve patch for battery, an end cover assembly, a battery, and an electric apparatus. The anti-explosion valve patch has an exhaust hole and includes: a patch body; and a closed convex ring disposed on the patch body, protruding from a surface of the patch body to a same side, where the exhaust hole is located on the closed convex ring or in a region enclosed by the closed convex ring. The anti-explosion valve patch of this disclosure is conducive to maintaining the protection capability of the anti-explosion valve. The end cover assembly of this disclosure includes such anti-explosion valve patch. The battery of this disclosure includes such end cover assembly. The electric apparatus of this disclosure includes such battery.