Battery Venting Cover Structure for Controlled Pressure Release
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Solution Overview
Problem
Secondary batteries are prone to short circuits due to manufacturing errors causing unintended contact between the cathode and anode plates, and existing venting mechanisms may fail prematurely under unexpected pressure, compromising safety and reliability.
Innovation Solution
A secondary battery design featuring a venting portion with a venting cover, notch portions, and a protrusion to manage pressure and prevent premature venting by incorporating protrusions to manage pressure, including a venting cover, notch portions, and protrusions to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple venting cover is used, then the structure is simple and easy to manufacture, but the venting reliability is low and unintended venting may occur
Solution Approach 1:
The venting cover is divided into multiple functional regions: a first venting cover portion and a second venting cover portion, with the second portion having a smaller area than the first. This segmentation allows different regions to perform different functions - the larger first portion provides stable support while the smaller second portion controls venting precision, thereby improving reliability without requiring complete structural redesign.
Solution Approach 2:
Different regions of the venting cover are designed with different properties. The first venting cover portion has a larger area to provide structural stability and support, while the second venting cover portion has a smaller area to precisely control the venting opening. This local differentiation optimizes both reliability and controlled venting behavior without unnecessarily increasing overall complexity.
2Stability of the object's composition
If the venting cover area is increased to improve stability, then stability improves, but unintended venting may occur under unexpected pressure
Solution Approach 1:
The venting cover is segmented into a first venting cover portion with larger area for stability and a second venting cover portion with smaller area for precise venting control. This segmentation resolves the contradiction by assigning different functional priorities to different regions - stability to the larger first portion and controlled venting to the smaller second portion.
Solution Approach 2:
The venting cover exhibits local quality differentiation where the first portion provides structural stability through its larger area, while the second portion provides precise venting control through its smaller area. This local differentiation allows the cover to simultaneously achieve both stability and venting precision without compromise.
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 enhanced venting reliability of the venting mechanism ensures the venting cover, notch portions, and protrusions manage pressure effectively, preventing unintended venting and enhancing the safety and reliability of secondary batteries.
Implementation Method 1
a venting portion disposed in the housing and openable by pressure of the accommodation space
Data Source
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AI summary
A secondary battery according to an embodiment of the present disclosure may include: a housing having an accommodation space; and a venting portion disposed in the housing and openable by pressure of the accommodation space, and the venting portion may include: a venting cover having one surface facing the accommodation space; a notch portion formed in the venting cover; and a protrusion portion protruding toward the notch portion.