Battery Cell Pressure Sensing With Gas-Permeable Liquid Sealing
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Solution Overview
Problem
Existing battery cell information collection methods require external devices that modify the cover plate, increasing complexity and reducing reliability.
Innovation Solution
An information collection device is arranged inside the battery cell, utilizing an air pressure sensor snap-fitted into a casing with a sealing member that allows gas passage but blocks liquid, ensuring reliable sealing and parameter acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external collection device is used with the collection terminal penetrating into the battery cell, then information collection is achieved, but the cover plate structure becomes complex and reliability decreases
Solution Approach 1:
The patent inverts the conventional external collection approach by placing the information collection device inside the battery cell. The collection terminal extends outward from the battery cell interior to the external environment, reversing the traditional penetration direction. This inversion eliminates the need for complex cover plate modifications while maintaining effective information collection capability.
Solution Approach 2:
The patent extracts the information collection function from the cover plate structure and integrates it into a separate device positioned within the battery cell. By taking out the collection terminal from the cover plate and making it an independent component that extends from the cell interior, the cover plate structure is simplified while the collection function is preserved.
2Loss of information
If an external collection device is used, then information collection is achieved, but the structure of the battery cell cover plate becomes more complex
Solution Approach 1:
The patent inverts the conventional external collection approach by placing the information collection device inside the battery cell. The collection terminal extends outward from the battery cell interior to the external environment, reversing the traditional penetration direction. This inversion eliminates the need for complex cover plate modifications while maintaining effective information collection capability.
3Loss of information
If the collection terminal penetrates into the battery cell, then information collection is achieved, but the sealing performance may be compromised
Solution Approach 1:
The patent introduces a sealing structure as an intermediary element that allows the collection terminal to pass through the battery cell cover plate while maintaining sealing performance. The sealing structure acts as a mediator between the penetration requirement for information collection and the sealing requirement for battery protection, resolving the contradiction between these two opposing needs.
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 internal arrangement simplifies the structure, enhances reliability, and allows real-time parameter collection without affecting the battery cell's integrity or power consumption.
Implementation Method 1
a sealing member sealing the first installation hole, the sealing member being used to allow gas to pass through and prevent liquid from passing through
Implementation Method 2
an air pressure sensor installed inside the casing, at least a part of the air pressure sensor being snap-fitted into the first installation hole to acquire an air pressure parameter outside the casing
Data Source
AI summary
An information collection device includes a casing, an air pressure sensor, and a sealing member. The casing has a first installation hole, the air pressure sensor is installed inside the casing, and at least a part of the air pressure sensor is snap-fitted into the first installation hole to acquire an air pressure parameter outside the casing. The sealing member seals the first installation hole, and the sealing member is used to allow gas to pass through and prevent liquid from passing through. Thereby, the information collection device is arranged in the battery cell, enabling it to collect information in an environment of electrolyte, thus mitigating the technical problems of complex structure and insufficient reliability of the cover plate of the battery cell caused by the external arrangement of the prior art information collection device.