Battery Pack Side Member Structure for Crash Load Distribution
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Solution Overview
Problem
The existing battery pack mounting structures for vehicles face a trade-off between increasing the vehicle's range by accommodating more battery modules or cells and ensuring adequate crash performance, as reinforcing members required for crash performance reduce the space for additional battery modules.
Innovation Solution
A battery pack mounting structure that includes a side member with partition walls, a side bush fastened through the partition walls, and a side mounting bolt secured to the vehicle body, which effectively distributes and supports external impacts, enhancing crash performance while allowing for increased battery module accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing members are provided in the battery pack to ensure crash performance, then the rigidity and crash performance are improved, but the number of battery modules or cells that can be accommodated is reduced, decreasing the vehicle range
Solution Approach 1:
The side member is segmented into multiple partition walls (first partition wall, second partition wall, third partition wall) that divide the side member into multiple compartments. This segmentation allows the structure to achieve high rigidity and crash performance through the distributed partition walls while still accommodating multiple battery modules or cells in the spaces between partitions, thus resolving the contradiction between structural strength and battery capacity.
2Quantity of substance
If the number of battery modules is increased to extend vehicle range, then the vehicle range is improved, but the crash performance and rigidity of the battery pack are reduced
Solution Approach 1:
The side member is divided into multiple partition walls that create a segmented structure. This segmentation provides multiple mounting positions for battery modules while maintaining structural rigidity through the distributed partition walls, allowing both increased battery capacity and preserved crash performance.
Solution Approach 2:
The partition walls are strategically positioned at specific locations within the side member to provide localized reinforcement where needed for crash performance, while leaving other areas open for battery module accommodation. This local quality approach ensures structural strength is enhanced precisely where required without unnecessarily reducing battery capacity.
3Strength
If partition walls are added to the side member to improve impact distribution, then the crash performance is improved, but the device complexity increases
Solution Approach 1:
The side member is segmented into multiple partition walls that work together to distribute impact forces. While this segmentation does increase structural complexity, it provides systematic and predictable impact distribution patterns that improve crash performance in a controlled manner.
Solution Approach 2:
The partition walls serve multiple functions simultaneously: they provide structural reinforcement for crash performance, create mounting positions for battery modules, and distribute impact forces throughout the side member. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall device complexity.
Data Source
AI summary
An embodiment battery pack mounting structure for a vehicle includes a side member disposed at a lateral side of a battery pack, the side member including a plurality of partition walls, a side bush fastened passing through the side member vertically and passing through the plurality of partition walls, and a side mounting bolt fastened to a vehicle body while passing through the side bush and the plurality of partition walls.