Fuel Cell Vehicle Hydrogen Pump Bracket Deformation
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Solution Overview
Problem
In fuel cell vehicles, the hydrogen pump's overhang structure leads to increased dash panel retreatment during collisions, applying a load to the vehicle's interior, which existing designs fail to adequately mitigate.
Innovation Solution
A fuel cell vehicle configuration with a hydrogen pump fixed to a lower portion of the fuel cell module via a bracket with controlled deformation strength, inclined positioning relative to an air compressor, and a layered bracket system to facilitate movement and reduce reaction forces during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hydrogen pump is installed to overhang the stack frame using a bracket, then the water discharging performance is improved, but the dash panel retreating amount increases during collision
Solution Approach 1:
The bracket's deformation strength parameter is specifically designed to be lower than the collision load from the wall portion, allowing controlled deformation during collision to reduce the dash panel retreating amount while maintaining the overhang configuration for water discharging performance
2Object-affected harmful factors
If the bracket deformation strength is set low to reduce dash panel retreating amount, then collision load is reduced, but the hydrogen pump movement may be insufficient
Solution Approach 1:
The bracket is designed with dynamic deformation characteristics that allow controlled movement of the hydrogen pump during collision. The deformation strength is optimized to enable sufficient hydrogen pump movement while effectively reducing the dash panel retreating amount, balancing collision load reduction with movement reliability
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
Effectively suppresses the load applied to the vehicle's interior during collisions by allowing the hydrogen pump to move and reduce dash panel retreatment, thereby minimizing internal loads.
Implementation Method 1
the deformation strength of the bracket is set to be lower than a load input from a wall portion behind the fuel cell accommodation space at the time of collision of the vehicle... since the bracket is deformed when input is applied to the bracket from the wall portion at the time of head-on collision of the vehicle
Data Source
AI summary
A fuel cell vehicle includes a fuel cell module accommodated in a fuel cell accommodation space disposed in a front portion of the vehicle, a hydrogen circulation flow path configured to recirculate anode off-gas that is discharged from a fuel cell constituting the fuel cell module to the fuel cell, and a hydrogen pump provided in the hydrogen circulation flow path and fixed to a lower portion of the fuel cell module. The hydrogen pump is fixed to the fuel cell module via a bracket and the deformation strength of the bracket is set to be lower than a load input from a wall portion behind the fuel cell accommodation space at the time of collision of the vehicle.