Vehicle Floor Reinforcement Layout for Battery Rigidity
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Solution Overview
Problem
Conventional vehicle body structures face limitations in overall rigidity enhancement due to local reinforcement methods for batteries in hybrid electric vehicles, which restrict the increase in torsional, front-rear, and left-right bending stiffness.
Innovation Solution
A vehicle body structure design that includes a battery mounting part with improved coupling and supporting structures, featuring cross members, center side members, reinforcing frames, and coupling bands to distribute impact loads and enhance stiffness, along with a battery coupling structure and fuel tank mounting system to increase rigidity and collision resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If local reinforcement of fastening portion is performed to fix battery to vehicle body structure, then battery mounting stability is improved, but overall vehicle body rigidity cannot be sufficiently increased
Solution Approach 1:
The vehicle body structure is divided into multiple reinforcement zones with different cross-member configurations. The floor structure includes first cross members in front of the battery, second cross members behind the battery, and third cross members at the rear, creating segmented reinforcement zones that collectively enhance overall rigidity while providing stable battery mounting support.
Solution Approach 2:
The reinforcement structure extends in multiple spatial dimensions with cross members arranged in front, behind, and at various positions relative to the battery. This multi-dimensional arrangement of first, second, and third cross members creates a comprehensive reinforcement network that simultaneously improves battery mounting stability and overall vehicle body rigidity.
2Strength
If conventional local reinforcement is applied to the battery mounting area, then battery fixation is achieved, but torsional stiffness and bending stiffness are limited
Solution Approach 1:
The cross member structure serves multiple functions simultaneously: first cross members provide battery fixation support, second cross members reinforce the rear floor, and third cross members enhance rear structural rigidity. This multi-functional reinforcement system collectively improves battery fixation capability while simultaneously enhancing torsional and bending stiffness throughout the vehicle body.
3Strength
If reinforcement structure is added to increase vehicle body rigidity, then overall stiffness is improved, but structural complexity increases
Solution Approach 1:
Reinforcement is applied locally at specific positions rather than uniformly throughout the entire vehicle body. First cross members are positioned in front of the battery, second cross members behind the battery, and third cross members at the rear, creating localized reinforcement zones that enhance rigidity without requiring complex structures throughout the entire vehicle body.
Data Source
AI summary
A vehicle body structure includes a battery mounting part provided below a floor for mounting at least one battery, first and second cross members to reinforce the floor in front of and behind the battery mounting part, respectively, left and right center side members extending in a front-rear direction and connecting the first cross member and the second cross member, wherein the left and right center side members are spaced apart from each other in a left-right direction and reinforce a portion of the floor, a fuel tank mounting part provided below the floor behind the second cross member, left and right reinforcing frames extending rearward from rear ends of the left and right center side members, respectively, to reinforce the floor, and left and right extension members extending rearward from rear ends of the left and right reinforcing frames, respectively, to reinforce the floor.