Battery Cell Venting Structure for Insulation-Safe Gas Exhaust
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Solution Overview
Problem
The discharge of high-temperature gas from an explosion-proof valve located on the electrode side of a battery cell damages the insulating material, increasing the risk of short-circuit failure and explosion.
Innovation Solution
The valve member for gas discharge is positioned away from the electrode, with a configuration compartment and exhaust compartment separated by a support member, incorporating cavities and flow guiding structures to expand gas diffusion and filter explosive impurities, reducing pressure and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the explosion-proof valve is disposed on the side where the electrode is located, then the gas discharge function is achieved, but the insulating material is damaged by high-temperature gas, increasing the risk of short-circuit failure
Solution Approach 1:
The invention extracts the harmful high-temperature gas discharge path away from the electrode side by positioning the explosion-proof valve on the opposite side of the cell. The gas discharge port is specifically arranged to face away from the electrode, thereby separating the harmful exhaust flow from the electrical components and insulating materials, eliminating the damage caused by high-temperature gas while maintaining the pressure relief function.
2Reliability
If the valve member is positioned on the electrode side for gas discharge, then the pressure relief mechanism functions, but the high-temperature gas damages electrical insulation and increases explosion risk
Solution Approach 1:
The invention inverts the conventional arrangement by positioning the explosion-proof valve on the side opposite to the electrode rather than on the electrode side itself. The valve member and gas discharge port are specifically oriented to expel high-temperature gas away from the electrical components, thereby protecting the insulation from thermal damage and reducing explosion risk while maintaining effective pressure relief.
3Reliability
If the electrode and gas discharge path are separated by positioning the valve member away from the electrode, then the insulating material is protected, but the device structure becomes more complex
Solution Approach 1:
The cell housing serves multiple functions: it contains the electrode assembly, provides structural support, and acts as the mounting structure for the explosion-proof valve on its opposite side. The housing itself becomes the gas discharge path, eliminating the need for separate exhaust channels or complex routing structures. This multi-functional design achieves insulation protection while avoiding increased structural complexity.
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
This configuration reduces the risk of explosion by separating the electrode's electrical connection from the gas discharge path, expanding gas diffusion, filtering impurities, and cooling the gas, thereby minimizing the risk of cell explosion.
Implementation Method 1
The addition of the cavity can expand a diffusion space of the gas and extend a flow path of the gas, such that gas pressure can be reduced through expansion
Implementation Method 2
explosive impurities therein can be filtered through the extended path and cooled, reducing a risk of explosion due to high pressure and high temperature
Data Source
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AI summary
The present application provides a battery (10) and an electric apparatus (100), the battery (10) includes a cell (11) and a support member (12), the support member (12) is provided with a configuration compartment (120) and an exhaust compartment (122), the cell (11) is disposed in the configuration compartment (120), the cell (11) includes a housing (113), an electrode (111), and a valve member (112), the valve member (112) is disposed on a side of the housing (113) facing the exhaust compartment (122) and is in communication with the exhaust compartment (122) in an open state, and the electrode (111) is disposed on a side of the housing (113) facing away from the valve member (112).