Pouch Cell Sealed-Portion Venting for Pressure-Triggered Gas Release
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Solution Overview
Problem
Pouch-shaped battery cells face the risk of swelling and explosion due to gas generation during use, and existing venting solutions complicate the manufacturing process and lower productivity.
Innovation Solution
A venting adjustment means is mounted to the sealed portion of the pouch-shaped battery cell, adjusting opening and closing based on internal pressure, comprising a clip-like structure with an external main body and an inner elastic portion to manage gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a main gas discharge pipe and an auxiliary gas discharge pipe are provided at a sealed portion to rapidly discharge gas, then gas discharge capability is improved, but the manufacturing process becomes complicated and productivity is lowered
Solution Approach 1:
The patent extracts the gas discharge function from the sealed portion itself and relocates it to a dedicated venting adjustment means mounted on the sealed portion. This separates the sealing function from the gas discharge function, allowing the sealed portion to be simple and easy to manufacture while the venting adjustment means handles gas discharge independently.
Solution Approach 2:
The venting adjustment means is designed to automatically adjust its opening and closing based on the pressure of gas generated in the battery cell, without requiring external control or complex mechanisms. The means serves itself by using the gas pressure to control the venting process, simplifying the overall system while maintaining effective gas discharge capability.
2Reliability
If the exposed part of the main gas discharge pipe is hermetically sealed by thermal fusion after gas discharge, then sealing reliability is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The venting adjustment means is designed to automatically close and seal the venting path before gas discharge is completed, eliminating the need for subsequent thermal fusion sealing steps. The preliminary closing action of the venting adjustment means ensures sealing reliability without requiring additional complex sealing processes.
Solution Approach 2:
The patent separates the venting adjustment function from the sealed portion structure, allowing the venting adjustment means to handle both gas discharge and automatic sealing operations independently. This extraction simplifies the sealed portion design while maintaining reliability through the dedicated venting means.
3Adaptability or versatility
If a venting adjustment means is mounted to the sealed portion to automatically adjust opening and closing based on gas pressure, then gas discharge control is improved, but the structure becomes more complex
Solution Approach 1:
The venting adjustment means automatically adjusts its opening and closing based on the pressure of gas generated in the battery cell, operating autonomously without external control systems. This self-service mechanism provides adaptive venting control while minimizing structural complexity by eliminating the need for external actuators or control circuits.
Solution Approach 2:
The venting adjustment means responds to changes in gas pressure parameters, automatically adjusting its state based on the pressure conditions inside the battery cell. This parameter-based control provides versatility in venting operations while maintaining a relatively simple structure that directly responds to pressure changes.
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 allows automatic venting when pressure increases, preventing explosions and simplifying the manufacturing process by eliminating the need for complex venting formations.
Implementation Method 1
the venting adjustment means adjusts opening and closing of the sealed portion having the venting adjustment means mounted thereto based on the pressure of gas in the pouch-shaped battery case
Implementation Method 2
the venting adjustment means may include an external main body portion and an inner elastic portion directly abutting the pouch-shaped battery case
Data Source
AI summary
The present invention relates to a pouch-shaped battery cell including an electrode assembly with a venting adjustment member. The pouch-shaped battery case can be configured to receive the electrode assembly, with an electrode lead extending from the electrode assembly. A part of the electrode lead can protrude outwards from the pouch-shaped battery case. A sealed portion can be formed at an outer periphery of the pouch-shaped battery case. The venting adjustment member can be mounted to a part of the sealed portion in a direction in which the electrode lead protrudes. The venting adjustment member is configured to adjust opening and closing of the sealed portion having the venting adjustment member mounted thereto based on the pressure of gas in the pouch-shaped battery case.