Body Transverse Wall Layout for EV Battery Crash Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing protective measures for traction batteries in electric vehicles are heavy and elaborate, which complicates their construction and does not effectively address the risk of battery deformation during accidents without adding significant weight or complexity.
Innovation Solution
A partial body design for electric vehicles featuring a double-walled body transverse wall that supports the traction battery and electric drive unit, connected to a body supporting structure via multiple joining points, allowing targeted support and deformation absorption during accidents, thus protecting the battery while maintaining a lightweight and simplified construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heavy and elaborate battery housing is used to protect the traction battery, then the battery protection is improved, but the vehicle weight increases
Solution Approach 1:
The patent combines the protective function with the existing body transverse wall structure. The body transverse wall serves dual purposes: structural support for the vehicle and protective barrier for the battery, eliminating the need for separate heavy protective housings while maintaining protection effectiveness
Solution Approach 2:
The body transverse wall is designed to perform multiple functions simultaneously: it provides structural rigidity for the vehicle body, serves as a crash element for energy absorption, and acts as a protective shield for the battery. This multi-functionality reduces overall system weight by consolidating protective functions into existing structural elements
2Reliability
If auxiliary frames and suspension elements are added to protect the battery, then the battery protection is improved, but the device complexity increases
Solution Approach 1:
The protective function is merged into the body transverse wall itself rather than adding separate auxiliary frames. The body transverse wall is designed with appropriate thickness and material properties to directly absorb crash loads and protect the battery, simplifying the overall structure by eliminating redundant protective components
Solution Approach 2:
The patent extracts the essential protective function from complex auxiliary frame systems and implements it through the simplified body transverse wall structure. By taking out only the necessary protective capability and integrating it into the existing body structure, the solution achieves protection without the complexity of multiple separate protective elements
3Reliability
If the body transverse wall is made thicker and more robust to protect the battery, then the battery protection is improved, but the vehicle weight increases
Solution Approach 1:
The body transverse wall is designed with locally optimized thickness and material properties specifically in the regions where battery protection is needed. Rather than uniformly thickening the entire wall, the design concentrates protective material where crash loads are most likely to affect the battery, reducing overall weight while maintaining protection effectiveness
Solution Approach 2:
The patent employs composite material structures for the body transverse wall, combining materials with different properties to achieve high strength-to-weight ratio. This allows the wall to provide adequate protection against battery deformation during crashes without requiring excessive material thickness that would increase vehicle weight
Data Source
AI summary
A partial body for an at least part-electrically operated motor vehicle includes a first receiving portion for a traction battery and a second receiving portion for an electric drive unit. The receiving portions are arranged behind one another with respect to a vehicle longitudinal direction and are arranged at least partially at the same height with respect to a vehicle vertical direction. Here, a body transverse wall, which is of double-walled design at least in certain portions and which extends in the vehicle vertical direction and vehicle transverse direction, is arranged between the first and second receiving portion such that, in the event of an accident-induced displacement of the drive unit in the direction of the traction battery. The drive unit can be supported on the body transverse wall in a targeted manner.