Bidirectional Battery Venting Disk for Side Gas Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current venting devices in secondary batteries discharge dangerous factors such as high-temperature gases and sparks directly upwards, posing safety risks, especially in electric vehicles.
Innovation Solution
A bidirectional venting device with a rupture disk featuring separate notch parts along the left and right half-surface corners that rupture to form a butterfly shape, directing discharge to both sides instead of upwards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a venting device is designed to discharge dangerous factors directly upwards, then the pressure release function is effective, but safety risk to driver or passengers increases
Solution Approach 1:
The single venting opening is segmented into multiple venting holes arranged in a circular pattern on the flange surface. This segmentation allows the dangerous factors to be discharged in multiple directions rather than concentrated in one upward direction, reducing the safety risk to driver or passengers while maintaining effective pressure release
Solution Approach 2:
The venting holes are arranged asymmetrically in a circular pattern around the central axis of the venting device. This asymmetric circular arrangement distributes the discharge direction radially outward in multiple directions, preventing concentrated upward discharge while ensuring effective pressure relief from the sealed cavity
2Ease of manufacture
If the venting device structure is simplified, then manufacturing cost decreases, but discharge direction control capability is reduced
Solution Approach 1:
The flange structure serves multiple functions: it provides mechanical support for the venting device, creates the sealed connection to the battery casing, and simultaneously forms the venting holes for directional discharge control. This multi-functionality achieves discharge direction control without adding separate complex components, maintaining ease of manufacture
Solution Approach 2:
The venting device utilizes the thin flange structure to achieve both sealing and venting functions. The flange acts as a flexible element that can be formed with integrated venting holes during manufacturing, providing directional discharge control through a simple, thin-walled structure rather than requiring rigid complex assemblies
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
Enhances safety by discharging hazardous materials to the sides, reducing the risk of injury to drivers or passengers in electric vehicles.
Implementation Method 1
a rupture disk provided with a notch part that ruptures when a pressure exceeds a preset value
Implementation Method 2
the rupture disk ruptures so that the first and second notch parts form a butterfly shape upon application of a pressure exceeding a preset value
Implementation Method 3
releases the pressure inside the secondary battery by rupturing when the pressure exceeds a certain level
Data Source
AI summary
Disclosed herein relates to a bidirectional venting device, including: a rupture disk provided with a notch part that ruptures when a pressure exceeds a preset value; and a mounting part provided along the border of the rupture disk, wherein the notch part includes: a first notch part formed along a left half-surface corner of the rupture disk, and a second notch part formed along a right half-surface corner of the rupture disk, spaced apart so as not to connect with the first notch part.