Battery Pack Reinforcing Part Load Resistance
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Solution Overview
Problem
The conventional battery pack design has a reinforcement bar that easily bends when subjected to external forces, compromising load resistance and the protection of battery cells.
Innovation Solution
A battery pack with a reinforcing part that extends along the bottom wall of the case, fixed at multiple points, including both ends and an intermediate point, to prevent bending and enhance rigidity, thereby improving load resistance and protecting the battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcement bar is used to strengthen the battery pack case, then the structural strength is improved, but the reinforcement bar easily bends when subjected to external forces
Solution Approach 1:
The reinforcement bar is segmented into multiple sections by providing intermediate support portions that divide the bar into multiple spans. This segmentation prevents the bar from bending as a single continuous element, significantly improving its load resistance while maintaining structural strength.
Solution Approach 2:
Intermediate support portions are strategically positioned at specific locations along the reinforcement bar to provide localized support. This allows the structure to have varying properties along its length, with enhanced support at critical points where bending moments are highest, optimizing both strength and reliability.
2Object-affected harmful factors
If the reinforcement bar is positioned above the junction box, then the junction box is protected from external forces, but the reinforcement bar structure becomes less stable
Solution Approach 1:
The reinforcement bar is extended in the width direction beyond the side walls of the case, utilizing the third dimension (width direction) to improve stability. This extension allows the bar to form a more rigid spatial structure that resists deformation while maintaining protection of the junction box located below.
Data Source
AI summary
Provided is a battery pack capable of improving load resistance of a reinforcing part and protecting battery cells inside a case. The battery pack 100 includes a reinforcing part 30 that is in contact with a bottom wall 10e of the case 10. The reinforcing part 30 extends in one direction D1 along the bottom wall 10e, and has dimensions d1, d2 in directions orthogonal to the one direction D1 that are larger than thickness t of side walls 10a, 10b, 10c, 10d of the case 10 and of the bottom wall 10e. The reinforcing part 30 has a pair of end fixed parts 31 that are fixed to both ends of the battery module 20 in the one direction D1, and an intermediate fixed part 32 between the pair of end fixed parts 31 and fixed to the battery module 20 or the case 10.