Rechargeable Battery Pack Holder Case Coupling
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Solution Overview
Problem
Standard rechargeable battery packs for portable power tools lack sufficient protection against mechanical impacts and have complex assembly processes.
Innovation Solution
A rechargeable battery pack design featuring a holder with coupling protrusions and grooves that securely attach to a case, providing enhanced impact resistance and simplifying assembly by using a combination of cylindrical and semi-circular structures for unit cell accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard rechargeable battery pack design is used, then the assembly process is simple, but the protection against mechanical impacts is insufficient
Solution Approach 1:
The coupling protrusions and coupling grooves merge the holder and case into a unified structure. The protrusions extend from the holder and fit into corresponding grooves in the case, creating an integrated assembly that provides impact protection while maintaining simple assembly through a single coupling mechanism.
Solution Approach 2:
The coupling protrusions are designed with curved surfaces including inclined portions and arc-shaped sections. These curved geometries enable smooth insertion and automatic alignment when the holder is placed into the case, simplifying the assembly process while ensuring secure mechanical coupling for impact resistance.
2Power
If multiple unit cells are accommodated in a single holder, then the battery pack meets power requirements, but the structural complexity increases
Solution Approach 1:
The holder is segmented into multiple receiving portions, each designed to accommodate a single unit cell. Each receiving portion includes cylindrical side walls and a bottom wall with coupling features. This segmentation allows multiple unit cells to be independently held within a unified structure, meeting power requirements while maintaining manufacturing simplicity through modular design.
Data Source
AI summary
A rechargeable battery pack is disclosed. In one aspect, the rechargeable battery pack includes a holder accommodating a plurality of unit cells, wherein each unit cell includes a rechargeable battery, and a case accommodating the holder. The case includes a bottom portion and a cover placed over the bottom portion and the holder. The holder includes a plurality of protrusions that protrude toward the bottom portion and the bottom portion has a plurality grooves defined to respectively correspond to the protrusions.