Battery Support Cross Member Connection Structure
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Solution Overview
Problem
Conventional battery support structures in electric vehicles compromise vehicle body strength and weight reduction due to inadequate connection designs, leading to suboptimal travel performance.
Innovation Solution
A battery support structure that connects the end of a cross member for battery support to a rear cross member and a side sill using a connection member with specific flange and web configurations, enhancing torsion strength and compactness while reducing vehicle weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional support members are used to support the battery, then the battery can be mounted on the vehicle body, but the strength of the vehicle body becomes low due to the vulnerable connection structure
Solution Approach 1:
The connection member merges the cross member for battery support with the rear cross member and side sill into a unified structural assembly. By integrating these components through a shared connection member with flanges and webs, the patent creates a combined structure that distributes loads across multiple vehicle body components, thereby enhancing overall connection strength and vehicle body strength simultaneously.
2Weight of moving object
If conventional support members are used to support the battery, then the battery can be mounted on the vehicle body, but the weight of the vehicle body cannot be reduced
Solution Approach 1:
The connection member employs parameter optimization in its geometric design, specifically using flanges with optimized thickness and width dimensions, and webs with optimized thickness and length. These parameter changes allow the connection structure to achieve high strength-to-weight ratio, enabling weight reduction while maintaining or enhancing vehicle body strength.
3Strength
If the connection structure is designed to consider the strength of the vehicle body, then the strength of the vehicle body is improved, but the travel performance of the vehicle becomes lower
Solution Approach 1:
The connection member implements local quality optimization by concentrating structural reinforcement only at the critical connection zones where the cross member meets the rear cross member and side sill. The flanges and webs are strategically positioned and dimensioned to provide localized strength enhancement without adding unnecessary weight or complexity to the entire vehicle body, thereby maintaining travel performance while improving connection strength.
Data Source
AI summary
A battery support structure of a vehicle includes a number of battery support members installed on a bottom surface of a rear floor of a vehicle body to support a battery unit. The battery support members include cross members for battery support extending in a widthwise direction of the vehicle body. A pair of side sills is installed on opposite sides of the rear floor. A rear cross member is installed on the bottom surface of the rear floor. At least one of the plurality of cross members for battery support is connected to the rear cross member and the side sill.