Battery Pack Gasket Compression for Waterproof Corner Sealing
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Solution Overview
Problem
Existing battery packs face challenges in achieving effective waterproof and dustproof performance due to assembly errors and shape differences in the pack case, which can lead to gaps and reduced sealing efficiency.
Innovation Solution
A battery pack design featuring a pack case with a case cover and a case tray, where a gasket with a flat part and a corner part is used to match the shape of the pack case, enhancing sealing efficiency by varying compression volumes across different areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber gasket is used at the junction between cases to seal the battery pack, then waterproof and dustproof performance is improved, but assembly errors occur due to step differences at contact portions
Solution Approach 1:
The gasket is segmented into different regions: a first region with a first thickness and a second region with a second thickness greater than the first thickness. This segmentation allows the gasket to accommodate step differences at case junctions while maintaining sealing effectiveness, thereby resolving the contradiction between waterproof performance and assembly accuracy.
Solution Approach 2:
The gasket exhibits local quality variation through its dual-region thickness design. The thicker second region is positioned at specific locations to compensate for step differences, while the thinner first region provides adequate sealing in flat areas. This localized adaptation enables the gasket to maintain both sealing performance and assembly tolerance.
2Reliability
If the case shape is changed to improve sealing, then waterproof and dustproof performance is improved, but the case complexity increases
Solution Approach 1:
The gasket serves as an intermediary element between the case components, absorbing the complexity of shape adaptation. Rather than modifying the case geometry to achieve sealing, the gasket's variable thickness profile accommodates case irregularities, thereby maintaining case simplicity while ensuring waterproof and dustproof performance.
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 proposed design significantly improves the waterproof and dustproof performance of the battery pack by ensuring a tighter seal through the adaptive gasket design, which corresponds to the shape of the pack case and varies compression volumes to enhance airtightness.
Implementation Method 1
varying compression volumes across different areas
Implementation Method 2
a gasket that is compressed to seal a junction between the cases
Data Source
AI summary
The present disclosure relates to a battery pack and a device including the same, and a battery pack according to an example embodiment of the present disclosure includes at least one battery module; a pack case that includes a case cover for covering the at least one battery module and a case tray coupled with an edge of the case cover; and a gasket that is arranged between the case cover and the case tray, wherein the gasket comprises a gasket flat part that is an area where the gasket extends without curvature, and a gasket corner part that is an area where the gasket is deformed to correspond to the shape of the pack case and is bent while having a curvature.