Battery Cell End Cover Venting Channel for Liquid Seal Avoidance
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Solution Overview
Problem
Battery cells face challenges in exhaust efficiency and reliability due to liquid sealing issues caused by pressure imbalances, which can lead to safety problems and hinder air circulation to exhaust mechanisms.
Innovation Solution
An end cover assembly with an insulating component and an exhaust channel between the end cover and the insulating component, facilitating air circulation to the exhaust mechanism and pressure relief components, thereby improving exhaust efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the space between the end cover and the insulating component is reduced, then the structural compactness is improved, but the exhaust efficiency deteriorates due to liquid sealing and hindered air circulation
Solution Approach 1:
The exhaust channel is segmented into multiple sections: a first exhaust channel section extending from the exhaust mechanism toward the insulating component, and a second exhaust channel section extending from the first section to the edge of the insulating component. This segmentation allows the exhaust function to be maintained while accommodating the compact structural requirements.
Solution Approach 2:
The exhaust channel utilizes three-dimensional spatial arrangement by extending in multiple directions and sections rather than a simple linear path. The channel navigates around the insulating component's position, using vertical and horizontal extensions to achieve communication between the exhaust mechanism and the external environment without requiring large overall space.
2Reliability
If the exhaust channel is extended to improve air circulation, then the exhaust efficiency is improved, but the structural complexity increases
Solution Approach 1:
The exhaust channel is integrated directly into the end cover structure, merging the exhaust function with the existing end cover component. This eliminates the need for separate exhaust housings or additional structural elements, reducing overall device complexity while maintaining effective exhaust performance.
Solution Approach 2:
The end cover serves multiple functions: it provides structural closure, houses the exhaust mechanism, and incorporates the exhaust channel pathway. This multi-functionality reduces the number of separate components needed, simplifying the overall structure while ensuring reliable exhaust operation.
Data Source
AI summary
The present application provides an end cover assembly for a battery cell. The end cover assembly includes: an end cover, an exhaust mechanism being provided on the end cover; and an insulating component provided on the side of the end cover close to the interior of the battery cell. An exhaust channel is provided between the insulating component and the end cover to communicate the exhaust mechanism with the interior of the battery cell. The end cover assembly can improve the exhaust efficiency of the battery cell, thereby improving the reliability of the battery cell.