Front Cross Beam Rib Structure for Electric Vehicle Impact Force Transfer
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Solution Overview
Problem
Electric vehicles face challenges due to the bulkiness and weight of batteries, which pose safety risks during collisions, as well as the need for efficient and lightweight body structures to counteract these factors, while protecting batteries from damage to prevent fires and corrosive hazards.
Innovation Solution
A front impact system for electric vehicles is designed, featuring a front cross beam with ribs and coupled crash beams that absorb and transfer collision forces, combined with a rigid tunnel and battery placement under the floor structure to isolate batteries and enhance passenger safety, using lightweight yet strong materials like aluminum and carbon fiber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If batteries are made larger and more numerous to power electric vehicles, then the vehicle's energy capacity and driving range are improved, but the vehicle's weight and bulkiness increase significantly
Solution Approach 1:
The battery pack is divided into multiple individual battery cells arranged in a modular fashion. This segmentation allows the energy capacity to be increased by adding more cells while maintaining a manageable weight distribution throughout the vehicle structure, preventing excessive concentration of weight in one location.
Solution Approach 2:
The battery cells are arranged in a three-dimensional configuration extending along the longitudinal axis of the vehicle and positioned beneath the floor structure. This spatial arrangement optimizes energy capacity while distributing weight across multiple dimensions, reducing the impact of total weight on vehicle performance.
2Reliability
If structural features are added to protect batteries during collisions, then battery safety is improved, but the vehicle's weight and structural complexity increase
Solution Approach 1:
The battery pack structure is merged with the vehicle's floor structure and chassis components. The battery cells are positioned within the structural framework of the vehicle, combining the protective function of the chassis with the battery housing, thereby improving battery safety without adding separate complex protective structures.
Solution Approach 2:
The vehicle's floor structure and chassis components serve multiple functions: they provide structural support for the vehicle, protect the battery cells during collisions, and contribute to the overall safety framework. This multi-functionality reduces the need for additional dedicated protective structures, maintaining structural simplicity while enhancing battery protection.
3Reliability
If the battery pack structure is integrated with the vehicle floor and chassis, then battery protection and vehicle stability are improved, but the difficulty of battery replacement increases
Solution Approach 1:
The battery pack is segmented into individual replaceable modules or cells that are connected to the vehicle's electrical system through standardized interfaces. This segmentation allows the entire battery pack to be protected as an integrated unit with the floor structure, while individual modules can be quickly replaced without requiring complex disassembly of the vehicle chassis.
Solution Approach 2:
Standardized electrical interfaces and connection mechanisms serve as intermediaries between the battery modules and the vehicle's chassis structure. These intermediaries facilitate easy connection and disconnection of battery modules, simplifying the replacement process while maintaining the integrated protective structure.
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 system effectively absorbs and directs collision forces, reducing the impact on batteries and passengers, while allowing for easy battery replacement and improving the vehicle's stability and safety by distributing weight and isolating batteries from the passenger compartment.
Implementation Method 1
The front cross beam may be configured to transfer force from a front collision to one or both of the left crash beam or the right crash beam
Data Source
AI summary
A front impact system for an electric vehicle includes a front cross beam extending across a front end of the electric vehicle. The front cross beam defines an interior comprising at least one rib extending along a length of the front cross beam. A left crash beam is coupled with a rear surface of the front cross beam. A right crash beam is coupled with the rear surface of the front cross beam. The front cross beam is configured to transfer force from a front collision to one or both of the left crash beam or the right crash beam.