Battery Cell Vent Cover With Staggered Notches for Vent Pressure
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Solution Overview
Problem
Conventional battery cells require significant notch formation for venting, leading to mold damage and reduced productivity, while maintaining adequate vent pressure.
Innovation Solution
A battery cell design with staggered upper and lower notched portions on the housing cover, forming a circular closed loop, to ensure vent pressure with reduced notch formation, minimizing mold damage and enhancing lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of notch formation is performed to secure vent pressure, then vent pressure is maintained, but mold damage increases and productivity decreases
Solution Approach 1:
The venting portion is segmented into multiple notched portions (first notched portion and second notched portion) distributed across different regions of the housing cover. This segmentation allows the venting function to be achieved through multiple smaller notches rather than one large notch, reducing mold damage while maintaining adequate vent pressure
Solution Approach 2:
Different regions of the housing cover are assigned different notched portions with specific configurations. The first notched portion is in a first region and the second notched portion is in a second region, allowing localized stress distribution and preventing concentrated mold damage while achieving overall vent pressure requirements
2Reliability
If a large amount of notch formation is performed to secure vent pressure, then vent pressure is maintained, but damage to mold increases
Solution Approach 1:
The venting function is divided into multiple notched portions located in different regions of the housing cover. This segmentation distributes the formation process across multiple smaller notches rather than one large notch, significantly reducing stress concentration and damage to the mold while maintaining the required vent pressure
Solution Approach 2:
The notched portions are arranged in different spatial regions (first region and second region) of the housing cover, utilizing spatial distribution to reduce localized stress on the mold during formation. This dimensional distribution approach protects mold integrity while achieving vent pressure requirements
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 staggered notched design allows for efficient vent pressure with less notch formation, reducing mold damage and increasing the battery cell's lifespan and productivity.
Implementation Method 1
wherein the venting portion is configured to break when internal pressure of the battery housing increases to a predetermined level or more
Data Source
AI summary
A battery cell according to an embodiment of the present disclosure includes an electrode assembly including a first electrode, a second electrode, and a separator interposed therebetween, a battery housing configured to receive the electrode assembly through an opening formed on one side thereof, and a housing cover configured to cover the opening and having a venting portion configured to break when internal pressure of the battery housing increases to a predetermined level or more, wherein the venting portion includes an upper notched portion provided on the upper surface of the housing cover and a lower notched portion provided on the lower surface of the housing cover, and wherein the upper notched portion and the lower notched portion are provided in a staggered state.