Battery Floor Assembly Layout for EV Side-Collision Protection
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Solution Overview
Problem
Electric vehicle batteries, particularly auxiliary batteries, are vulnerable to side collisions and require effective protection to prevent damage and secondary damage from fires.
Innovation Solution
A vehicle structure incorporating a pair of side sills with reinforcement materials and a floor assembly that includes a first and second cross member, distributing side loads and simplifying the connection structure to absorb impact energy, thereby protecting both main and auxiliary batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single cross member is used to connect side sills, then the connection structure is simple, but the side load cannot be effectively distributed and battery protection is insufficient
Solution Approach 1:
The single cross member is divided into two separate cross members (first cross member and second cross member) positioned at different locations. This segmentation allows the side load to be distributed to multiple connection points, enhancing battery protection while maintaining reasonable structural complexity through modular design
2Strength
If the second cross member is coupled directly to side sills, then the connection is strong, but it may interfere with battery mounting space
Solution Approach 1:
The second cross member is positioned in the height direction (vertical dimension) between the first battery mounting space and the second battery mounting space. This vertical positioning allows the cross member to connect to side sills at a height that does not encroach upon the horizontal battery mounting spaces, thereby maintaining both connection strength and adequate battery volume
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure effectively absorbs impact energy from side collisions, reduces vehicle body deformation, and enhances the connection integrity of battery protection components, improving the side collision performance of electric vehicles.
Implementation Method 1
a pair of side sills each extending in a longitudinal direction of a vehicle body... effectively protect a battery of an electric vehicle including an auxiliary battery from a side collision by distributing a side load
Implementation Method 2
a first cross member coupled to the panel and having both ends coupled to the pair of side sills in a first direction; and a second cross member having both ends coupled to the pair of side sills in a second direction... distributing a side load
Data Source
AI summary
A structure for protecting a battery for a vehicle can include a pair of side sills each extending in a longitudinal direction of a vehicle body, and a floor assembly coupled between the pair of side sills. The floor assembly can include a panel that forms a space for mounting a first battery, a first cross member coupled to the panel and having both ends coupled to the pair of side sills in a first direction, and a second cross member having both ends coupled to the pair of side sills in a second direction and spaced apart from the first cross member with the space for mounting the first battery therebetween.