Fuel Cell Stack Damage Detection via Deformable Fragile Part
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Solution Overview
Problem
In typical fuel cell vehicles, determining stack damage from lateral displacement during collisions is challenging without external sensors, leading to increased costs due to the necessity of acceleration and pressure sensors.
Innovation Solution
A fuel cell vehicle design featuring a fragile part integrated with the stack frame that deforms visibly upon collision, allowing visual inspection to assess stack damage orthogonal to the cell stacking direction, thereby omitting the need for external sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If acceleration sensors and pressure sensors are mounted on the vehicle body to detect collision forces, then the accuracy of determining stack damage is improved, but the manufacturing cost increases
Solution Approach 1:
The patent employs a fragile part that is intentionally designed to be deformable and sacrificial. This fragile part serves as a low-cost, single-use indicator that deforms under collision forces to reveal stack damage, replacing expensive reusable sensors with a disposable visual indicator system
Solution Approach 2:
The patent replaces the electronic sensor-based detection system with a mechanical indicator system. The fragile part mechanically responds to collision forces through deformation, substituting complex electronic measurement systems with a simple mechanical visual indication mechanism
2Strength
If the stack frame is made rigid to protect the stack from collision damage, then the stack protection is improved, but the ability to visually detect lateral displacement damage is worsened
Solution Approach 1:
The patent divides the stack frame into two functional segments: a rigid main body for structural protection and a fragile part for damage indication. This segmentation allows the frame to simultaneously provide strong protection while enabling visual detection of lateral displacement through the deformable fragile component
Solution Approach 2:
The fragile part acts as an intermediary element between the rigid stack frame and the visual observation system. It translates internal lateral displacement forces into external visible deformation, serving as a mediator that makes invisible damage mechanisms observable without compromising the overall structural integrity
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
Enables cost-effective visual determination of stack damage after collisions, reducing the reliance on acceleration and pressure sensors while ensuring accurate assessment of lateral displacement impacts.
Implementation Method 1
a fragile part configured to be located so as to come into contact with a side surface of the stack frame that is orthogonal to a direction in which cells in the stack are stacked while the stack is fixed to the stack frame, and be deformed when a preset collision force causing damage to a stack is applied
Data Source
AI summary
A fuel cell vehicle capable of determining, when a fuel cell vehicle collides with a rigid body, whether a stack is damaged by a visual observation at a low cost. A fuel cell vehicle includes: a fragile part configured to be located so as to come into contact with a side surface of the stack frame that is orthogonal to a direction in which cells in the stack are stacked, and be deformed when a preset collision force causing damage to a stack is applied; and a deformation part configured to form a part of the vehicle body, and be deformed and come into contact with the fragile part when a collision force is applied to the vehicle body.