Battery Pack Guide Projection for Scratch-Free Disassembly
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Solution Overview
Problem
Existing battery packs face challenges in easily separating components adhered to the case, as the wire saw used to cut the adhesive often catches on steps between the component and the case, leading to scratches and inefficient disassembly.
Innovation Solution
The battery pack design incorporates guide projections with inclined portions that guide the wire saw to the adhesive, preventing it from catching on steps and allowing for easy separation of the component from the case, while also providing intervals to manage adhesive spreading and prevent unintended adhesive placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire saw is inserted to cut the adhesive between the component and the case, then the component can be separated from the case, but the wire saw catches on the step between the bottom surface and the adhesion projection causing scratches and cutting failure
Solution Approach 1:
The inclined portion is provided in advance on the guide projection to prepare a smooth guiding path for the wire saw before it reaches the adhesion projection. This preliminary action prevents the wire saw from catching on the step by gradually guiding it to the correct position, thereby avoiding scratches and cutting failures.
Solution Approach 2:
The guide projection with the inclined portion acts as an intermediary between the wire saw and the adhesion projection. It mediates the interaction by providing a smooth transition surface that guides the wire saw to the adhesive without direct contact with the step, preventing harmful effects while enabling the cutting operation.
2Strength
If the adhesion projection is provided to adhere the component to the case, then the component is securely fixed, but the step between the bottom surface and the adhesion projection causes wire saw catching
Solution Approach 1:
The guide projection is segmented into two distinct portions: the inclined portion for guiding the wire saw and the first portion for overlapping with the adhesion projection. This segmentation allows each portion to perform its specific function independently, with the inclined portion facilitating easy disassembly while the first portion maintains adhesion strength.
Solution Approach 2:
Different portions of the guide projection have different local qualities: the inclined portion has a gradual slope for guiding the wire saw, while the first portion has a higher projection degree to overlap with the adhesion projection. This local differentiation allows the structure to simultaneously achieve secure adhesion and easy disassembly.
3Ease of operation
If the projection degree of the guide projection is increased to guide the wire saw effectively, then the wire saw guidance is improved, but the guide projection may interfere with the adhesive application area
Solution Approach 1:
The guide projection utilizes the vertical dimension by having different projection degrees at different locations. The inclined portion has a lower projection degree to guide the wire saw, while the first portion has a higher projection degree to overlap with the adhesion projection. This dimensional variation allows effective wire saw guidance without interfering with adhesive placement.
Data Source
AI summary
A battery pack may include a component housed in a case. The component may include an adhesion projection and a first guide projection projecting from a bottom surface of the component. The first guide projection may include: a first portion overlapping the adhesion projection; and a second portion not overlapping the first portion. A projection degree of the first portion may be greater than or equal to a projection degree of the adhesion projection. The second portion may include an inclined portion, wherein a projection degree of the inclined portion increases toward the first portion so that a projection degree of the second portion increases from a value lower than the projection degree of the adhesion projection to a value greater than or equal to the projection degree of the adhesion projection. An end surface of the adhesion projection may be adhered to the inner surface.