Side Vehicle Body Reinforcing Structure for Load Path Continuity
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Solution Overview
Problem
The existing structure for mounting high-capacity batteries in vehicles complicates load transfer, leading to a deterioration in collision performance, especially for side vehicle bodies, due to severed load paths.
Innovation Solution
A side vehicle body reinforcing structure that includes a center floor panel, side sill, seat cross member, combination reinforcement member, partition wall panel, extending nut, and internal nut, which collectively enhance load transfer efficiency and collision performance by ensuring continuity of load paths and preventing direct load transfer to the battery compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a battery case is mounted to the lower surface of the center floor panel in the existing structure, then the high-capacity battery can be accommodated, but the load transfer path is severed and collision performance deteriorates
Solution Approach 1:
The floor panel structure is segmented into multiple components: center floor panel, side floor panels, and a separate battery case. The battery case is positioned on the lower surface of the center floor panel but does not interrupt the load transfer path between the side floor panels, allowing both battery accommodation and load transfer continuity.
Solution Approach 2:
The side floor panels act as intermediary elements that transfer side collision loads from the side sills to the front and rear side members, bypassing the battery case area. This intermediary load path prevents the battery case from being in the direct load transfer path while still providing structural reinforcement.
2Ease of manufacture
If the battery case is directly mounted to the center floor panel, then installation is simplified, but load transfer efficiency decreases due to severed load paths
Solution Approach 1:
The floor panel structure has different functional zones: the center floor panel area accommodates the battery case, while the side floor panel areas are optimized for load transfer. The side floor panels are specifically designed with reinforcement to handle side collision loads, creating local quality differences that optimize both battery mounting and load transfer.
3Reliability
If reinforcement structures are added to maintain load transfer paths, then collision performance improves, but device complexity increases
Solution Approach 1:
The side floor panels serve multiple functions: they provide structural reinforcement for load transfer, define the boundary of the battery case mounting area, and contribute to the overall rigidity of the floor assembly. This multi-functionality reduces the need for separate reinforcement structures.
Solution Approach 2:
The battery case mounting structure is merged with the floor panel assembly. The side floor panels are positioned to work together with the center floor panel and battery case, creating an integrated structure where the load transfer path flows through the side floor panels without requiring separate reinforcement components.
Data Source
AI summary
A side vehicle body reinforcing structure may include a center floor panel; a side sill respectively combined to both sides of the center floor panel in a width direction of the vehicle body; a seat cross member configured so that a lower end thereof is combined to the center floor panel and both ends thereof in a width direction of the vehicle body are combined to the side sill to cross the center floor panel in a width direction of the vehicle body; a battery case combined to a lower surface of the center floor panel and disposed at an internal to the side sill; and a partition wall panel respectively both side plates of the battery case in a width direction of the vehicle body, wherein a combining bolt sequentially penetrating the seat cross member and the center floor panel is engaged to the partition wall panel.