EV Floor Panel Reinforcement for Rear-End Collision
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Solution Overview
Problem
The existing designs of electric vehicle bodies fail to effectively mitigate deformation of the floor panel during a rear-end collision, particularly due to the lack of adequate reinforcement in the vicinity of the battery case, which can lead to structural instability and increased risk of damage.
Innovation Solution
The proposed solution involves a battery case reinforcement extending along the side edge of the battery case, fastened to the rocker with multiple bolts, which provides additional support to the floor panel by distributing the load applied during a collision, thereby reducing deformation. This reinforcement is strategically positioned from a point forward of the first floor crossmember to a point rearward of the first crossmember, enhancing the structural integrity of the vehicle's floor panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the battery case is placed below the floor panel without additional reinforcement, then the vehicle structure is simpler and easier to manufacture, but the floor panel deforms easily during rear-end collision
Solution Approach 1:
The patent applies local quality by adding reinforcement members specifically at the battery case and floor panel areas that require enhanced strength during rear-end collisions, while keeping other parts of the vehicle structure simple. The reinforcement members are strategically positioned to provide localized strengthening without complicating the overall manufacturing process.
2Strength
If the battery case reinforcement extends from frontward to rearward of the first floor crossmember and is fastened with multiple fastening members, then the floor panel deformation is mitigated during rear-end collision, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the reinforcement structure into multiple components: the battery case reinforcement extending along the side edge, multiple fastening members (first and second) positioned at different locations, and integration with the first floor crossmember. This segmented approach allows the reinforcement function to be achieved through coordinated simple elements rather than a single complex structure.
Data Source
AI summary
A body of an electric vehicle may include: a floor panel; a rocker; a first floor crossmember protruding from a first surface of the floor panel and joined to the rocker; a body component protruding from the first surface and extending rearward from the first floor crossmember so as to shift upward toward a rear end of the electric vehicle; a battery case located below the floor panel; a battery case reinforcement extending along a side edge of the battery case, located below the rocker, and extending from a position frontward of the first crossmember to a position rearward of the first crossmember; a first fastening member fastening the battery case reinforcement to the rocker in a range frontward of the first floor crossmember; and a second fastening member fastening the battery case reinforcement to the rocker in a range rearward of the first floor crossmember.