Multi-Segment EV Chassis for Protected Battery and Electronics Support
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Solution Overview
Problem
Electrically-powered delivery and utility vehicles face limitations in their design, particularly in the arrangement and support of power sources and electronic devices, which can affect performance and efficiency.
Innovation Solution
A multi-segment chassis design is introduced, comprising a front suspension subframe assembly, rear suspension subframe assembly, power source cradle assembly, midframe assembly, and electronics cradle assembly, which support wheels, power sources, and electronic devices, respectively, with specific structural components like base rails, cross rails, and enclosures to optimize their arrangement and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power sources and electronic devices are installed in electric delivery vehicles using conventional chassis designs, then the vehicles can be manufactured with simpler structures, but the structural integrity and protection of power sources are compromised
Solution Approach 1:
The chassis is divided into multiple subframes (front suspension subframe, rear suspension subframe, midframe subframe) that are coupled together. Each subframe serves specific functions and provides localized support and protection for different components, thereby improving overall structural integrity while maintaining manufacturing feasibility through modular assembly.
Solution Approach 2:
The power sources are enclosed within an enclosure that is integrated with the chassis structure. The enclosure is positioned between the front and rear suspension subframes, nesting the power sources within the protective framework of the chassis to enhance their protection without significantly increasing external dimensions.
2Reliability
If power sources are arranged between suspension subframes, then protection and support are improved, but the device complexity increases
Solution Approach 1:
The midframe subframe serves multiple functions: it couples the front and rear suspension subframes together, provides structural support, and helps define the enclosure for power sources. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while achieving improved power source protection.
Solution Approach 2:
The enclosure for power sources is merged with the chassis structure itself rather than being a separate standalone component. The enclosure walls are formed by structural elements of the chassis, combining the protective function with the load-bearing function of the chassis.
Data Source
AI summary
Land vehicles are disclosed. A land vehicle includes a chassis extending in a longitudinal direction and a plurality of wheels supported by the chassis. The plurality of wheels include a pair of front wheels and a pair of rear wheels arranged rearward of the pair of front wheels in the longitudinal direction. The chassis includes multiple sections or segments that are spaced from one another in the longitudinal direction.