Fuel Cell Under-Panel Impact Absorption
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Solution Overview
Problem
Existing fuel cell vehicle structures inadequately protect fuel cell units from collisions from the bottom surface, as they lack effective impact absorption mechanisms, particularly from road surface interference.
Innovation Solution
Incorporating a fuel cell system with protective structural bodies featuring an under-panel at the bottom surface, which includes a reinforcing frame and carbon fibers for enhanced rigidity and impact absorption, and strategically positioning the fuel cell unit and related devices to absorb collision energy effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel cell system is disposed on the lower side of the occupant cabin to reduce piping and wiring length, then the safety in the event of collision from side directions is improved, but the protection from impacts from the ground surface deteriorates
Solution Approach 1:
An under-panel is introduced as an intermediary protective element between the ground surface and the fuel cell system. The under-panel is disposed below the fuel cell unit and related devices, serving as a mediator that absorbs and distributes impact forces from road surface interference, thereby protecting the fuel cell system without requiring it to be positioned higher up
Solution Approach 2:
The under-panel provides beforehand cushioning by being positioned in advance below the fuel cell system components. It is designed to absorb impact energy from ground-level collisions before the force can reach the fuel cell unit and related devices, creating a protective buffer zone that cushions against road surface interference
2Length of stationary object
If the fuel cell unit is positioned close to the ground surface to minimize vehicle height, then the vehicle size is reduced, but the impact energy from road surface interference increases
Solution Approach 1:
The under-panel serves as a mediator structure between the ground and the fuel cell system components. It is specifically designed to intercept and absorb impact forces from road surface interference, allowing the fuel cell unit to remain positioned low in the vehicle while still being protected from impact energy
Solution Approach 2:
The under-panel changes the parameter of impact force distribution by spreading the concentrated impact energy from road surface interference across a larger area. This parameter change reduces the peak force transmitted to the fuel cell unit, enabling low-positioned components to withstand ground-level impacts
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 solution effectively protects fuel cell units and related devices from collision impacts using a lightweight structure, ensuring the fuel cell system's integrity and safety by distributing and absorbing impact energy through the under-panel and structural integration with the vehicle frame.
Implementation Method 1
impact energy from the ground surface cannot be absorbed
Implementation Method 2
an under-panel on a bottom surface of one of the protective structural bodies... including a reinforcing frame and carbon fibers for enhanced rigidity and impact absorption
Data Source
AI summary
Provided is a protective structure for a fuel cell system in a vehicle. The fuel cell system includes a fuel cell unit accommodating a fuel cell and a related device disposed adjacently to the fuel cell unit. The protective structure enables effective protection of the fuel cell unit and the related device from impacts from below the vehicle. The fuel cell unit and the related device are provided at respective protective structural bodies. An under-panel is provided on at least one of the bottom surfaces of the protective structural bodies. A floor panel covers commonly the bottom surface sides of the fuel cell unit and the related device.