Side Vehicle Body Reinforcing Structure with Integrated Battery Case Mounting
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Solution Overview
Problem
The existing side vehicle body reinforcing structures for vehicles with high-capacity batteries face challenges in efficiently transferring loads and maintaining performance against collisions, particularly side collisions, due to complex battery case mounting structures that can lead to load transfer disruptions.
Innovation Solution
A side vehicle body reinforcing structure comprising a center floor panel, a battery case mounted on the center floor panel, a box-shaped side sill extending in the front and rear direction, a seat cross member, a pipe nut penetrating through the battery case and side sill, and additional reinforcing members and expansion foam for enhanced structural integrity and load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a battery case is mounted on the center floor panel with a complex structure, then the battery can be securely fixed, but the load transfer path may be severed and collision performance deteriorates
Solution Approach 1:
The battery case mounting structure is merged with the side vehicle body reinforcing structure by integrating the battery case with the side sill and seat cross member. This consolidation creates a unified load-bearing framework that eliminates separate mounting components, ensuring continuous load transfer paths while maintaining secure battery fixation.
Solution Approach 2:
The side sill and seat cross member are pre-configured with coupling structures before battery installation. The pipe nuts are positioned in advance at strategic locations where the battery case will be mounted, ensuring that the load transfer path is established prior to battery installation and preventing any severance of load paths.
2Productivity
If the battery case is mounted on the center floor panel, then space is utilized, but load transfer efficiency decreases due to structural disruption
Solution Approach 1:
The side sill and seat cross member serve dual functions: they provide structural reinforcement for side collision resistance and simultaneously serve as mounting structures for the battery case. This multi-functionality eliminates the need for separate mounting components, maintaining load transfer efficiency while utilizing the center floor panel space.
Solution Approach 2:
The pipe nut acts as an intermediary component that connects the battery case to the side sill and seat cross member. This intermediary element ensures continuous load transfer between the battery case and the vehicle body structure, preventing load path severance while enabling secure battery mounting.
3Stability of the object's composition
If additional reinforcing members and expansion foam are added, then structural integrity is enhanced, but manufacturing complexity increases
Solution Approach 1:
Reinforcement is applied locally at critical stress points rather than uniformly throughout the entire structure. The first and second reinforcing members are strategically positioned within the side sill at locations subject to highest stress during side collisions, and expansion foam is injected only into specific void spaces where structural support is most needed, optimizing strength while minimizing manufacturing complexity.
Data Source
AI summary
A side vehicle body reinforcing structure is provided to improve efficiency of load transferring and performance against a vehicle collision. The structure includes a center floor panel that forms a bottom surface of a vehicle body and a battery case coupled to a lower surface of the panel. A side sill is coupled with both sides of the panel in a width direction to be disposed at both sides of the battery case, and has a cross-section formed in a box shape and extends in a front and rear direction of a vehicle body. A seat cross member has a lower end coupled with the panel, and crosses the panel in a width direction to be coupled with the side sill. A pipe nut extends vertically to sequentially penetrate the battery case, the side sill, the panel, and the seat cross member and is fixed to the battery case.