Battery Venting Cover Structure to Prevent Unintended Opening
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Solution Overview
Problem
Secondary batteries are prone to short circuits due to unintended contact between cathode and anode plates during manufacturing, and existing venting mechanisms may fail prematurely under pressure, compromising safety and reliability.
Innovation Solution
A secondary battery design featuring a venting portion with a venting cover and notch portions that include protrusion elements to manage pressure and prevent unintended venting, enhancing structural integrity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a venting portion is designed to open under pressure, then venting reliability is improved, but unintended venting may occur due to manufacturing errors or pressure fluctuations
Solution Approach 1:
A support structure is introduced as an intermediary element between the electrode assembly and the venting portion. This support structure prevents direct contact between the electrode assembly and the venting portion, thereby eliminating unintended venting caused by manufacturing errors while preserving the venting function when actually needed
Solution Approach 2:
The support structure is pre-installed to counteract potential manufacturing errors and pressure fluctuations before they can cause unintended venting. By providing preliminary support, the system prevents harmful venting events before they occur
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 increases venting reliability by managing pressure and preventing premature venting, ensuring safer operation and improved safety in secondary batteries.
Implementation Method 1
a venting portion disposed in the housing and openable by the pressure of the accommodation space
Data Source
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.