Vehicle Body Coupling Structure for Battery Capacity and Crash Rigidity
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Solution Overview
Problem
The challenge is to enhance the safety performance and body rigidity of a vehicle while increasing the battery capacity, which is difficult due to the limited space under the body for mounting batteries, leading to compromised structural integrity during collisions.
Innovation Solution
The proposed solution involves a vehicle body design that includes an internal side member on the center floor, a battery cross member within a battery case at the lower end of the center floor, and a coupling structure that connects these components at their intersection points, thereby improving the structural integrity and dispersing collision loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery volume is increased by 1.5 times or more to secure the cruising distance of 200 miles or more, then the battery capacity is improved, but the space for mounting main members and reinforcement materials under the body is reduced, causing body rigidity and safety performance to deteriorate
Solution Approach 1:
The patent positions the battery case at the lower end portion of the center floor, utilizing the vertical dimension and lower space that would otherwise be unused. This allows increased battery capacity without compromising the upper structural space needed for main members and reinforcement materials, effectively resolving the space conflict between battery capacity and body rigidity.
Solution Approach 2:
The patent divides the body structure into distinct functional zones: the lower end portion of the center floor is dedicated to battery mounting, while the upper portions maintain traditional structural components. This segmentation allows each zone to optimize its function without interfering with the other, enabling both high battery capacity and maintained body rigidity.
2Quantity of substance
If the battery volume is increased by 1.5 times or more to secure the cruising distance of 200 miles or more, then the battery capacity is improved, but the safety performance during collision is reduced due to insufficient reinforcement materials
Solution Approach 1:
The patent applies reinforcement materials and main members specifically in the upper portions of the body structure where they are most needed for collision protection, while the lower battery area is protected through strategic positioning and selective reinforcement. This localized approach ensures safety performance is maintained in critical areas without sacrificing battery capacity.
Solution Approach 2:
The patent introduces a coupling structure that acts as an intermediary between the battery case and the body's main members. This coupling structure disperses collision loads effectively, protecting both the battery and the overall body structure during impacts, thereby maintaining safety performance despite increased battery capacity.
3Quantity of substance
If most of the space under the body is used for mounting the battery, then the battery capacity is improved, but the device complexity increases due to difficulty in constructing main members and reinforcement materials
Solution Approach 1:
By utilizing the lower end portion of the center floor for battery mounting, the patent creates a clear spatial separation between battery placement and structural component construction. This dimensional approach simplifies the construction process by providing dedicated zones for each function, reducing the complexity of coordinating battery installation with reinforcement material placement.
Data Source
AI summary
A body for a vehicle configured for securing safety performance and vehicle rigidity according to a vehicle collision while increasing a battery capacity mounted in the vehicle, may include an internal side member mounted on a center floor in a longitudinal direction of the body; a battery cross member mounted in a width direction of the body inside a battery case provided at a lower end portion of the center floor while intersecting the internal side member; and a coupling structure coupled to the battery case, the battery cross member, and the center floor.