Battery Cell Venting Structure Using Seal Reinforcement Tapes
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Solution Overview
Problem
Pouch-shaped batteries face safety risks due to gas buildup during charge and discharge, which can lead to ignition or explosion, and existing gas discharge solutions increase manufacturing costs and complexity.
Innovation Solution
A battery cell with a venting structure using taping, where seal reinforcement tapes are attached to some thermally bonded edges to allow gas generated during charge and discharge to be safely discharged through venting guide parts at unattached edges, simplifying the manufacturing process and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas discharge solutions are implemented in pouch-shaped batteries, then safety is improved by preventing ignition and explosion, but manufacturing cost and complexity increase
Solution Approach 1:
The patent extracts the gas discharge function from a separate complex component and integrates it directly into the sealing structure itself. The sealing structure includes a rupture disk and vent channel formed as integral parts of the sealed enclosure, eliminating the need for additional gas discharge components and reducing manufacturing complexity while maintaining safety functionality
Solution Approach 2:
The patent merges the sealing function and gas discharge function into a single integrated sealing structure. The sealing structure simultaneously provides hermetic sealing and controlled gas discharge pathways, combining multiple functions into one component to reduce overall device complexity and manufacturing steps
2Reliability
If gas discharge solutions are implemented in pouch-shaped batteries, then safety is improved by preventing ignition and explosion, but manufacturing cost increases
Solution Approach 1:
The patent extracts the gas discharge function from a separate complex component and integrates it directly into the sealing structure itself. The sealing structure includes a rupture disk and vent channel formed as integral parts of the sealed enclosure, eliminating the need for additional gas discharge components and reducing manufacturing cost
Solution Approach 2:
The sealing structure is designed to perform multiple functions: hermetic sealing, controlled gas discharge, and structural support. This multi-functionality eliminates the need for separate gas discharge components, reducing part count and manufacturing cost while maintaining safety functionality
3Reliability
If the battery case is completely sealed to prevent leakage, then reliability is improved, but gas buildup causes safety risks
Solution Approach 1:
The patent introduces a rupture disk as an intermediary element within the sealing structure. This rupture disk acts as a pressure-sensitive mediator that remains intact during normal operation to maintain sealing, but ruptures when excessive pressure builds up, providing a safety release mechanism without compromising the overall sealing integrity
Solution Approach 2:
The sealing structure is pre-designed with integrated vent channels and rupture disks that automatically activate when gas pressure exceeds safe levels. This preliminary design ensures that before dangerous pressure buildup occurs, the built-in safety mechanisms are already in place to prevent ignition or explosion
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 solution effectively prevents ignition and explosion by safely discharging high-pressure gas and simplifies the battery cell structure and manufacturing process, improving overall safety while maintaining cost-effectiveness.
Implementation Method 1
thermally bonded edges for sealing the receiving part
Implementation Method 2
gas generated in the receiving part during charge and discharge of the battery cell is discharged out of the receiving part through venting guide parts
Data Source
AI summary
A battery cell of a venting structure using taping is disclosed. The battery cell includes a battery case including a first case and a second case, at least one of the first and second cases being provided with a receiving part for receiving the electrode assembly, thermally bonded edges for sealing the receiving part being provided outside the receiving part, a positive electrode lead and a negative electrode lead protruding outward from the battery case, and an electrode assembly received in the battery case, the electrode assembly having electrode tabs protruding from one end thereof, the electrode tabs being coupled to the positive electrode lead and the negative electrode lead, wherein seal reinforcement tapes are attached to some of the thermally bonded edges so as to surround outer ends of the some thermally bonded edges.