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Characterization of On-Board Vehicular Hydrogen Sensors
- Ground Vehicle Standard
- J3089_201810
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Technical Information Report (TIR) provides test methods for evaluating hydrogen sensors when the hydrogen system integrator and/or vehicle manufacturer elect to use such devices on board their hydrogen vehicles, including hydrogen fuel cell electric vehicles (FCEV).
The tests described in 5.1 of this document are performance-based and were developed to assess hydrogen sensor metrological parameters. These tests were designed to accommodate a wide range of environmental and operating conditions based on different possible situations and sensor implementations within the vehicle. Section 5.2 covers supplemental electrical safety and physical stress tests. These are based upon standard tests developed for qualifying electrical and other components for use on vehicles and do not explicitly pertain to gas sensor metrological performance assessment. Since the use of on-board hydrogen sensors is not standardized or mandated, their implementation can vary greatly from vehicle to vehicle and among potential applications or functions. For example, an on-board sensor could be located in a relatively dry environment such as in the passenger compartment or in a “highly humidifed” environment, such as within the process exhaust from the fuel cell system. As this is a guidance document and not a standard, no specific application will be identified. Also, as a guidance document, no performance specification or pass/fail criteria will be defined. For this reason, the hydrogen system integrator and/or vehicle manufacturer need to determine which tests and associated test conditions are relevant for their application(s). Thus, it is the prerogative of the hydrogen system integrator and/or vehicle manufacturer to define specific test acceptance criteria necessary to achieve the required performance of their process control and protective systems within the vehicle. The sensor manufacturer or testing laboratory is to present results of each test to the hydrogen system integrator and/or vehicle manufacturer, who will then use the results to ascertain the suitability of a sensor technology for their application.
Rationale
Standards (such as SAE J2578 [1], SAE J2579 [2], and ISO 23273 [3]) and regulations such as the Global Technical Regulation Number 13 (GTR) for hydrogen powered vehicles [4] provide requirements for hydrogen and fuel cell vehicles and associated hydrogen systems. While these standards and regulations do not explicitly prescribe that hydrogen sensors are to be used on-board the vehicle, vehicle manufacturers and hydrogen system integrators may chose to use hydrogen sensors as part of their process control and fault management strategies to protect occupants of the vehicle and by-standers from flammable gas hazards.
This SAE report defines tests and decribes protocols that can be employed by hydrogen system integrators and vehicle manufacturers and their suppliers to evaluate the performance of hydrogen sensors under conditions likely to exist within their systems/vehicles. By so doing, the proper sensor can be selected for on-board their vehicles.
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Topic
Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Table 1 | Preferred hydrogen concentration units | |
Table 2 | Common sensor platforms used for the detection of hydrogen | |
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
Unnamed Dataset 5 | ||
Table 3 | Temperature dependence of humidity levels in air | |
Table 4 | Test gases and concentrations for use in the Chemical Stress Test - Impact of Chemical Interferents | |
Table 5 | Test gases and concentrations for use in the Chemical Stress Test - Impact of Poisons (10-hour exposures) | |
Table 6 | Recommended Physical Stress Tests | |
Table 7 | PSD values for different frequencies | |
Table A1 | Comparison of sensor F.I. (Sensor Validation Test versus Measurement Range Test) | |
Table A2 | Measuring Range Test - Sensor 1 F.I. for the ascending and descending exposures | |
Table A3 | Sensor F.I. for the Repeatability/Short-Term Stability Test | |
Table A4 | Sensor pressure dependence, net and normalized F.I. | |
Table A5 | Sensor temperature dependence, net and normalized F.I. | |
Table A6 | Humidity Dependence Test net and normalized F.I. | |
Table A7 | Orientation Test | |
Table A8 | Cold Power-Up Test | |
Table A9 | Low- and High-Power Operation Test | |
Table A10 | Chemical Interference Test, response of 1 vol% CH on H sensors | |
Unnamed Dataset 21 | ||
Table B1 | Parts list for the gas generation system (see ) | |
Table B2 | Relative volumes of hydrogen and air source gases to generate various test gases (normalized to 1000 sccm) | |
Table B3 | Relative flow rates of air, 2 vol% H in air, and the contaminant in air source gases needed to generate the required test gases (normalized to 1000 sccm) for the Chemical Interferent Test (see ) |
Issuing Committee
The Fuel Cell Standards Committee is responsible for establishing standards for hydrogen and fuel cell vehicles. Standards will cover the safety aspects of hydrogen, fuel cell, and electrical systems in the vehicle, test procedures to establish the performance of the vehicle, system/components, and interface requirements.
Reference
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