Battery Case Pressure Relief Valve With Dual Pressure Surfaces
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Solution Overview
Problem
Existing pressure release valves for battery cases may not open promptly due to inefficient pressure reception by the valve body, which can lead to delayed pressure reduction and potential damage to the case.
Innovation Solution
A valve configuration that includes a first valve body with a first and second pressure receiving surface, an elastic member to press the valve body toward the gas outlet, and a support to maintain the elastic member, allowing the valve to open quickly when pressure exceeds a predetermined value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the valve body tilts relative to the axis of the gas outlet when opening, then the valve structure can be simplified, but the valve body cannot efficiently receive the pressure of escaping gas, causing delayed opening
Solution Approach 1:
The valve body is designed with an asymmetric pressure receiving surface configuration where the first pressure receiving surface is positioned at an angle to the gas outlet axis, and the second pressure receiving surface is positioned at a different angle, creating an asymmetric arrangement that optimizes pressure reception while maintaining simplified structure
Solution Approach 2:
The invention transitions from a single-pressure-receiving-surface design to a two-dimensional pressure reception system by adding the second pressure receiving surface around the first, effectively utilizing multiple spatial dimensions to receive pressure from escaping gas and improve opening speed
2Ease of manufacture
If the valve body tilts relative to the axis of the gas outlet, then manufacturing may be easier, but the pressure receiving efficiency decreases, hindering prompt opening
Solution Approach 1:
The pressure receiving function is segmented into two distinct surfaces: the first pressure receiving surface facing inside the case and the second pressure receiving surface located around it, allowing each surface to independently receive pressure from different directions of escaping gas
Solution Approach 2:
Different portions of the valve body are assigned different functional qualities - the first pressure receiving surface is optimized for receiving pressure from the case interior, while the second pressure receiving surface is optimized for receiving pressure from the escaping gas flow, creating local quality differentiation
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 increased pressure receiving area enables the valve to open the gas outlet promptly, effectively reducing pressure in the case and preventing damage.
Implementation Method 1
an elastic member configured to press the first valve body toward the gas outlet
Implementation Method 2
a first pressure receiving surface facing inside of the case via the gas outlet
Implementation Method 3
a second pressure receiving surface located around the first pressure receiving surface. The second pressure receiving surface may be configured to receive a pressure of gas escaping from the gas outlet to the outside of the case
Data Source
AI summary
A valve may be mounted on a case that houses a battery. The valve may be configured to open and close a gas outlet through which gas inside the case escapes to outside of the case. The valve may include: a first valve body configured to open and close the gas outlet; an elastic member configured to press the first valve body toward the gas outlet; and a support configured to support the elastic member. The first valve body may include: a first pressure receiving surface facing inside of the case via the gas outlet; and a second pressure receiving surface located around the first pressure receiving surface. The second pressure receiving surface may be configured to receive a pressure of gas escaping from the gas outlet to the outside of the case when the first valve body opens the gas outlet.