Fuel Cell Turbo And Humidifier Degradation Detection By Efficiency Gap
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Solution Overview
Problem
Existing fuel cell systems for vehicles lack an efficient method to determine the degradation state of the turbo and/or humidifier, which can impact system efficiency and require premature maintenance or replacement.
Innovation Solution
A computer-implemented method that calculates the degradation state of the turbo and/or humidifier by comparing the efficiency decrease of the fuel cell system with the efficiency decrease of the fuel cell stack, using sensors to measure efficiency values and relative air humidity, and applying a humidifier model when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no degradation determination method is implemented, then the system operates without additional complexity, but the degradation state of the turbo and/or humidifier remains unknown leading to premature maintenance or replacement
Solution Approach 1:
The system uses its own existing sensors and operational data to determine the degradation state of the turbo and/or humidifier. The control unit utilizes already-available measurements of efficiency, power, and operational parameters without requiring external monitoring equipment, making the system self-diagnosing and avoiding additional hardware complexity.
Solution Approach 2:
The control unit continuously monitors efficiency values and operational parameters, comparing current performance against reference values to detect degradation. This feedback mechanism enables real-time assessment of component health, allowing the system to adapt operations or alert operators when degradation thresholds are reached, thereby improving reliability without significant added complexity.
2Measurement precision
If traditional monitoring methods are used, then comprehensive component surveillance is possible, but the determination process becomes time-consuming and costly
Solution Approach 1:
The method extracts the specific degradation information for the turbo and/or humidifier from the overall system operational data. By isolating the efficiency decrease specifically attributable to these components through calculation based on power balance and operational parameters, the system obtains precise degradation measurements without requiring separate dedicated monitoring equipment or time-consuming separate tests.
Solution Approach 2:
The patent replaces physical inspection methods or dedicated sensor installations with a computational approach. The control unit calculates degradation state using software-based analysis of existing operational data, substituting mechanical or manual assessment methods with automated computational evaluation, thereby reducing both time and cost while maintaining measurement precision.
3Reliability
If the turbo and/or humidifier are replaced prematurely, then system reliability is maintained, but resource waste and increased maintenance costs occur
Solution Approach 1:
The system performs preliminary assessment of the degradation state using calculated efficiency values and operational data before replacement is considered necessary. By evaluating the actual degradation level through the control unit's calculations, the system can determine the optimal replacement timing in advance, preventing both premature replacement and operation beyond acceptable degradation thresholds, thereby optimizing resource utilization while maintaining reliability.
Data Source
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Figure 3
Figure 4a~4b
AI summary
The invention relates to a computer-implemented method for determining a degradation state of a turbo (20) and/or a humidifier (30) of a fuel cell system (1) for a vehicle (100), the fuel cell system (1) comprising a fuel cell stack (10), in addition to the turbo (20) and the humidifier (30), wherein the method comprises: - obtaining (S1) a fuel cell system efficiency value which corresponds to a measured efficiency decrease of the fuel cell system (1) during use with respect to a first reference efficiency, - obtaining (S2) a fuel cell stack efficiency value which corresponds to a measured efficiency decrease of the fuel cell stack (10) during use with respect to a second reference efficiency, and - determining (S3) the degradation state of the turbo (20) and/or the humidifier (30) based on a difference between the fuel cell system efficiency value and the fuel cell stack efficiency value. The invention also relates to a control unit (40), a fuel cell system (1), a vehicle (100), a computer program and a computer-readable medium.