Battery Explosion-Proof Valve Geometry for Pressure Release Timing
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Solution Overview
Problem
Existing battery designs face challenges in controlling the timing of pressure release through explosion-proof valves, leading to potential safety issues due to unpredictable valve activation.
Innovation Solution
A battery design incorporating an explosion-proof valve with specific geometric configurations, including a first straight line segment, a second straight line segment, and a circular arc segment, with defined ratios and dimensions to ensure controlled pressure release when internal pressure reaches a preset value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional explosion-proof valve is used to release pressure, then pressure release function is provided, but the timing of valve activation cannot be controlled
Solution Approach 1:
The patent applies parameter changes by precisely controlling the geometric dimensions of the explosion-proof valve structure. The specific ratios (0.9≤a/b≤1.9 and 0.5≤c/r≤2.7) are designed to ensure the valve activates at the appropriate pressure threshold, transforming the uncontrolled valve into one with predictable timing through dimensional parameter optimization
Solution Approach 2:
The patent incorporates a circular arc segment with specific radius ratio constraints (0.5≤c/r≤2.7) into the explosion-proof valve structure. This curved geometry distributes stress more effectively and contributes to controlling the activation timing, replacing purely linear structures with optimized curved profiles
2Ease of manufacture
If the explosion-proof valve structure is simplified, then manufacturing is easier, but the control over valve activation timing is lost
Solution Approach 1:
The patent establishes specific parameter ranges (0.9≤a/b≤1.9 and 0.5≤c/r≤2.7) that balance manufacturing feasibility with functional performance. These parameter specifications provide clear manufacturing targets while ensuring the valve achieves the desired activation timing, avoiding both overly complex and overly simplified designs
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 design ensures reliable and timely pressure release, enhancing safety performance by preventing unexpected valve activation and minimizing the risk of explosion, while optimizing stress distribution and space utilization.
Implementation Method 1
When the internal pressure of battery casing 20 reaches a preset value, at least one of the first straight line segment 11, the second straight line segment 12 and the circular arc segment 13 may be broken through
Data Source
AI summary
A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve includes a first straight line segment, a second straight line segment and a circular arc segment. Two ends of the circular arc segment are respectively connected to the first straight line segment and the second straight line segment. Lengths of the first straight line segment and the second straight line segment are respectively a and b, and an arc length of the circular arc segment is c, a radius of curvature of the circular arc segment is r, and 0.8≤a/b≤1.2 and 0.5≤c/r≤2.7 are satisfied.