Integrated Balance Explosion-Proof Valve for Lower CNC Complexity
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Solution Overview
Problem
Existing balance explosion-proof valves for power batteries face challenges in manufacturing cost and processing complexity, particularly due to the separation of guide rod and piston components and the complex bottom structure of the guide rod.
Innovation Solution
The proposed balance explosion-proof valve integrates a valve body with a pressure relief assembly and an air pressure balance assembly, featuring a guide rod and piston as a single unit and simplifying the structure by using a magnetic sheet with notches for ventilation, reducing CNC processing steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the guide rod and piston are separated components, then the structure can be assembled, but sealing performance cannot be ensured and manufacturing cost increases
Solution Approach 1:
The guide rod and piston are merged into a single integrated component. The piston forms the bottom structure of the guide rod, eliminating the need for separate components and their associated sealing requirements. This integration reduces manufacturing cost while ensuring reliable sealing as there are no joint interfaces between separate parts.
2Ease of manufacture
If the guide rod is processed by turning and milling with complex bottom structure, then the structure can be formed, but CNC processing steps increase significantly
Solution Approach 1:
The complex bottom structure of the guide rod is merged with the piston body. The piston forms the bottom closure of the guide rod, combining what would otherwise be separate structural elements into one integrated component that requires fewer CNC processing steps.
3Ease of manufacture
If vent grooves are defined in the piston by turning and milling, then ventilation function is achieved, but CNC processing amount increases
Solution Approach 1:
The vent grooves are extracted from the piston and relocated to the upper cover plate. The upper cover plate defines the vent grooves that communicate with the inner concave cavity, eliminating the need for complex CNC processing of the piston while maintaining the ventilation function.
4Ease of manufacture
If serrated structure is disposed on the piston upper surface, then gripping function is achieved, but CNC processing amount increases
Solution Approach 1:
The serrated structure is extracted from the piston and relocated to the upper cover plate. The upper cover plate defines serrated structures that engage with the piston, providing the gripping function while eliminating complex CNC processing requirements from the piston itself.
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
This design reduces manufacturing costs and processing complexity while maintaining effective pressure balancing and relief functions, enhancing the safety and efficiency of power battery explosion-proofing.
Implementation Method 1
a waterproof breathable membrane covering the air hole is mounted on the piston
Implementation Method 2
a waterproof breathable membrane covering the air hole is mounted on the piston
Implementation Method 3
a spring disposed between the valve body and the guide rod
Data Source
AI summary
A balance explosion-proof valve includes a valve body, a pressure relief assembly assembled on the valve body, and an air pressure balance assembly assembled on the pressure relief assembly. The valve body includes an outer ring body, an inner ring body, and connecting arms connected to an inner surface of the outer ring body and an outer surface of the inner ring body. The pressure relief assembly includes a piston pressed against a surface of the outer ring body, a waterproof breathable membrane, an upper cover plate, and a magnetic sheet covering the waterproof breathable membrane. The waterproof breathable membrane is coupled to the piston. The air pressure balance assembly is installed on the piston and passes through the central sleeve hole. The piston includes an inner concave cavity, a pressing step protruding from the inner concave cavity, and an outer ring portion protruding from the pressing step.