Battery Pack Hold Down Bracket for Vibration Fixation
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Solution Overview
Problem
Conventional battery packs lack a structure to securely fix battery modules against forward and backward directional vibrations, leading to potential deformation when external forces are applied.
Innovation Solution
Incorporating a hold down bracket that covers outward protrusions of battery modules and couples to a base plate, providing stable fixation and minimizing deformation through fastening members and a bead structure for increased rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If supporting bars and end plates are used to fix battery modules, then rigidity is improved and movement is minimized, but the battery pack remains vulnerable to forward and backward directional vibrations causing internal deformation
Solution Approach 1:
The holding structure is divided into multiple independent holding pieces, each responsible for securing specific battery modules at different positions. This segmentation allows the structure to address vibration issues at multiple locations simultaneously, preventing internal deformation while maintaining overall rigidity.
Solution Approach 2:
The holding pieces extend in the forward-backward direction (third dimension relative to the battery module arrangement), providing support specifically targeted at counteracting vibrations in this direction. This dimensional addition addresses the previously unprotected vibration direction without compromising existing structural strength.
2Reliability
If a structure to prevent forward and backward vibration is added, then stability is improved, but device complexity increases
Solution Approach 1:
The holding pieces serve multiple functions: they secure battery modules in place, prevent forward-backward vibrations, and maintain structural alignment. By designing components that perform multiple functions simultaneously, the patent achieves vibration protection without proportionally increasing overall structural complexity.
Solution Approach 2:
Rather than redesigning the entire support structure, the patent applies holding pieces at specific locations where vibration protection is most needed. This localized approach provides necessary stability while minimizing the addition of structural complexity to the overall system.
Data Source
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AI summary
Disclosed herein is a battery pack including a battery module assembly configured to have a structure in which two or more battery modules, each of which includes battery cells arranged in an upright state such that electrode terminals of the battery cells are directed upward, are arranged such that the battery modules are adjacent to each other, and outward protrusions are formed at a lower end of one side or lower ends of opposite sides of each of the battery modules, a base plate, on a top of which the battery module assembly is loaded, and a hold down bracket having one side region covering the outward protrusions of the battery modules and the other side region coupled to the base plate so as to correctly fix the respective battery modules of the battery module assembly to the base plate.