Battery Pack Case Cover Fixation Without Complex Buckles
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Solution Overview
Problem
Conventional notebook computer battery pack cases face challenges due to insufficient snap-fit force from simple buckles and increased space and cost requirements from complex buckles, which hinder efficient accommodation of protection plates and cells.
Innovation Solution
The battery pack case features a frame body with partition strips and a cover plate assembled via laser welding, utilizing first and second protrusions on the partition strips to securely position and fix the cover plate, eliminating the need for additional buckles and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple buckle is used to fix the cover plate, then the device complexity is reduced, but the snap-fit force is insufficient and reliability deteriorates
Solution Approach 1:
The partition strip is segmented into multiple functional zones: a first protrusion for supporting the cover plate, a second protrusion for limiting the edge position, and a communication groove for cell placement. This segmentation allows each zone to perform its specific function independently, achieving reliable fixation without requiring a complex buckle structure.
2Reliability
If a complex buckle is used to improve snap-fit force, then the reliability is improved, but the space occupied increases and the volume of the battery pack case deteriorates
Solution Approach 1:
The partition strip integrates multiple functions that would traditionally require separate components: structural support, edge positioning, and cell access. By merging these functions into a single integrated partition strip with protrusions and grooves, the design eliminates the need for additional buckles, thereby reducing the overall volume of the battery pack case while maintaining reliable fixation.
3Reliability
If a complex buckle is used to improve snap-fit force, then the reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The partition strip is designed with distinct segmented features (first protrusion, second protrusion, communication groove) that can be directly formed during injection molding. This segmentation approach allows for straightforward mold design compared to integrating a complex buckle mechanism, thereby reducing manufacturing complexity and processing costs while achieving the required snap-fit force through the distributed protrusion structure.
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 solution effectively reduces the space occupied by the cover plate in the battery pack case, allows for larger protection plates, and lowers production costs while improving waterproof performance and assembly efficiency.
Implementation Method 1
a lower end of the edge of the cover plate is fixedly connected to upper ends of the first protrusions in a manner of laser welding
Data Source
AI summary
Disclosed are a battery pack case and a battery pack. The battery pack case includes a frame body and a cover plate. The frame body includes partition strips, and the frame body is internally provided with an accommodating space for a protection plate defined by the partition strips. The cover plate is assembled on an upper opening of the accommodating space for the protection plate. A top end of the partition strips is provided with first protrusions and second protrusions, and the second protrusions are located at an outer side of the first protrusions and are higher than the first protrusions. An edge of the cover plate is limited to inner sides of the second protrusions and is supported on the first protrusions. A lower end of the edge of the cover plate is fixedly connected to the upper ends of the first protrusions in a manner of laser welding.