Battery Pressure Relief Valve Plate Mounting for Stable Vent Opening
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Solution Overview
Problem
Existing pressure relief mechanisms in batteries suffer from early valve opening due to welding stress and deformation issues, affecting the reliability and stability of the pressure relief valve plate.
Innovation Solution
A pressure relief component with a mounting member and a pressure relief valve plate featuring a bent mounting part supported on a recess bottom wall and welded to a recess side wall, which distributes stress uniformly and enhances vibration resistance, reducing deformation and improving the valve opening timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pressure relief valve plate is directly welded to the mounting member, then the welding process is simple, but welding stress causes early valve opening and deformation
Solution Approach 1:
The mounting part is divided into multiple sections (first mounting part, second mounting part, third mounting part) with different functions. The first mounting part contacts the recess bottom wall for support, the second mounting part is welded to the recess side wall, and the third mounting part connects to the body part. This segmentation allows stress to be distributed across different regions, preventing stress concentration at the welding location and avoiding early valve opening.
Solution Approach 2:
The mounting part acts as an intermediary component between the pressure relief valve plate and the mounting member. It includes a recess bottom wall contact section, a recess side wall welding section, and a connection section, which together serve as a stress-distributing intermediary that protects the valve plate from direct welding stress while maintaining secure attachment.
2Strength
If the mounting part is rigidly connected to the body part, then the structural strength is high, but vibration resistance and stress distribution are poor
Solution Approach 1:
The third mounting part changes its geometric parameters to form a bent structure with specific curvature radius and thickness. This bent configuration transforms the rigid connection into a flexible joint that can absorb vibration energy while maintaining sufficient structural strength. The parameter optimization allows the mounting part to deform elastically under vibration, protecting the valve plate from stress concentration.
3Productivity
If the pressure relief valve plate is welded without support structure, then the welding process is fast, but deformation such as edge warping occurs
Solution Approach 1:
The mounting part is pre-formed with a bent structure and positioned on the recess bottom wall before welding occurs. This preliminary positioning provides structural support and constraint to the valve plate during the welding process, preventing edge warping and deformation. The pre-configured mounting part acts as a temporary support framework that maintains geometric precision throughout welding.
Solution Approach 2:
The mounting part extends into the recess depth direction, utilizing the third dimension (depth) to provide support. The recess bottom wall contact section and recess side wall welding section create a three-dimensional support structure that constrains the valve plate in multiple directions, preventing planar deformation during welding while maintaining welding speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves the stability and reliability of the pressure relief valve plate by uniformly distributing stress, reducing deformation, and enhancing vibration resistance, ensuring accurate valve opening timing and improved welding quality.
Implementation Method 1
the mounting parts being bent to be supported on the recess bottom walls and being welded to the recess side walls
Data Source
AI summary
A pressure relief component, a battery cell, a battery and an electrical apparatus, belonging to the technical field of batteries. The pressure relief component includes a mounting member and a pressure relief valve plate; the mounting member is provided with an opening, the mounting member is provided with sinking recesses around a circumferential direction of the opening, and each sinking recess includes a recess bottom wall and a recess side wall; and the pressure relief valve plate covers the opening, and the pressure relief valve plate includes a body part and mounting parts, the body part being provided with weak areas, the mounting parts being connected to a periphery of the body part, and the mounting parts being bent to be supported on the recess bottom walls and being welded to the recess side walls.