CN113447835A - Test evaluation method for reliability of fuel cell system - Google Patents
Test evaluation method for reliability of fuel cell system Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 155
- 238000012360 testing method Methods 0.000 title claims abstract description 122
- 238000011156 evaluation Methods 0.000 title claims abstract description 14
- 238000013101 initial test Methods 0.000 claims abstract description 9
- 238000013102 re-test Methods 0.000 claims abstract description 5
- 238000011056 performance test Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 28
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 16
- 239000001257 hydrogen Substances 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 16
- 239000000110 cooling liquid Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010998 test method Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000002826 coolant Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 208000012661 Dyskinesia Diseases 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000000725 suspension Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The invention provides a test evaluation method for reliability of a fuel cell system, which comprises the following steps: s1, performing performance initial test on the reliability of the fuel cell system, and detecting and evaluating the initial performance of the fuel cell system; s2, performing reliability test on the reliability of the fuel cell system, and detecting whether the fuel cell system meets the actual use requirement; and S3, retesting the reliability of the fuel cell system, and comparing the retest with the initial performance test result to obtain the performance attenuation condition of the fuel cell system. The invention has the beneficial effects that: the scheme fills the international blank of a reliability test system for the fuel cell engine, improves the adaptability test of the extreme environment and the reliability of the fuel cell engine when leaving the factory, and embodies obvious advantages from the aspects of simplification, rationality, authenticity and the like of the test.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a test evaluation method for reliability of a fuel cell system.
Background
With the large-scale demonstration application of the fuel cell in the field of new energy vehicles, the existing test evaluation system can not completely cover the application scene of the fuel cell engine, and a test method meeting different working conditions needs to be established, so that the applicability of the product is improved. In order to improve the reliability of a fuel cell engine when leaving a factory, the working condition of a limit test condition must be improved to meet the actual use requirement and scene, for example, a conventional engine and a power cell both have a relatively mature test system, so that a test evaluation method for the reliability of a fuel cell system is urgently needed.
Disclosure of Invention
In view of the above, the present invention aims to provide a test and evaluation method for reliability of a fuel cell system, to specify a test method for reliability of a proton exchange membrane fuel cell engine, to set up test methods under different working conditions, to cover an application scenario of the fuel cell system, to well supplement a standard system of the fuel cell system, to fill up a gap in the international test system for reliability of the fuel cell engine, to improve adaptability test in a limited environment and reliability of the fuel cell engine when the fuel cell engine leaves a factory, and to embody obvious advantages in the aspects of simplification, rationality, authenticity and the like of the test.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a test evaluation method for reliability of a fuel cell system comprises the following steps:
s1, performing performance initial test on the reliability of the fuel cell system, and detecting and evaluating the initial performance of the fuel cell system;
s2, performing reliability test on the reliability of the fuel cell system, and detecting whether the fuel cell system meets the actual use requirement;
and S3, retesting the reliability of the fuel cell system, and comparing the retest with the initial performance test result to obtain the performance attenuation condition of the fuel cell system.
Further, in step S1, the performance initial test includes a gas tightness test, a steady-state load characteristic test, a rated power test, and an insulation test.
Further, in step S2, the reliability test includes: start-stop cycle condition test, rated condition test and load cycle condition test.
Further, the air tightness test comprises the following steps:
a1, pretreatment by using a soaking machine: completing a startup and shutdown process of the fuel cell before soaking, and standing the fuel cell engine in a normal-temperature environment to ensure that the internal temperature of the fuel cell engine is the same as the ambient temperature;
a2, single-cavity pressure maintaining: closing an exhaust port of a fuel cell engine, filling detection gas into a hydrogen inlet port of the fuel cell engine, setting the pressure as a working pressure specified by a manufacturer, closing a hydrogen inlet valve after the pressure is stable, keeping the pressure, and recording a pressure drop value;
double-cavity pressure maintaining: closing an exhaust port, an air exhaust port and a cooling liquid outlet of the fuel cell engine, simultaneously filling detection gas into a hydrogen flow channel, an air flow channel and a cooling liquid flow channel, setting the pressure as the working pressure specified by a manufacturer, closing an air inlet valve and keeping the pressure after the pressure is stable, and recording the pressure drop value; a3, if the recorded descending value is higher than the pressure value specified by the manufacturer, the item is qualified.
Further, the steady-state load characteristic test is carried out when the fuel cell engine is in a heat engine state, and the method comprises the following steps:
b1, after the heat engine process is finished, returning to the idling state for running, loading to a predetermined working condition point according to a loading mode specified by a manufacturer, and continuously and stably running for a set time at each working condition point;
and B2, recording the current, the voltage and the hydrogen consumption of the fuel cell engine and the voltage and the current of the auxiliary system, and obtaining a polarization characteristic curve of the fuel cell stack, a power curve of the fuel cell stack, an efficiency curve of the fuel cell stack, a power curve of the fuel cell engine, an efficiency curve of the fuel cell engine and a power curve of the auxiliary system according to the test data.
Further, the rated power test is carried out when the fuel cell engine is in a heat engine state, and the method comprises the following steps:
c1, after the heat engine process is finished, returning to the idling state for running, loading to a working condition point of rated power according to a loading mode specified by a manufacturer, and continuously and stably running for a set time;
c2, recording the time of rated power operation, the voltage of the fuel cell engine, the current, the hydrogen consumption, the circuit voltage of the auxiliary system.
Further, the reliability test of the start-stop working condition comprises the following steps:
d1, starting the fuel cell engine according to the technical requirements and carrying out heat engine, and carrying out start-stop cycle working condition test after the outlet temperature of the cooling liquid of the fuel cell engine reaches the temperature value required by the heat engine;
d2, operating each working condition in turn according to the preset fuel cell engine start-stop cycle working condition: after the fuel cell engine is started, loading to a rated working condition according to the requirements specified by a manufacturer, stopping after stable operation is carried out for a set time under the rated working condition, rapidly cooling a fuel cell cooling system within the allowable range of the fuel cell engine after stopping, and cooling the outlet temperature of the cooling liquid to the end.
Further, in step S2, the reliability test includes a start-stop condition reliability test, a rated condition reliability test, and a load cycle condition reliability test.
Further, the rated working condition reliability test comprises the following steps:
e1, starting the fuel cell engine according to the technical requirements and carrying out heat engine, and carrying out rated working condition test after the water outlet temperature of the fuel cell engine reaches the temperature value required by the heat engine;
e2, the fuel cell engine stably operates under the rated working condition, each cycle is carried out for a set time, the cycles are carried out for a set number of times, the set duration is operated, and data are recorded.
Further, the load cycle working condition reliability test comprises the following steps:
f1, starting the fuel cell engine according to the technical requirements and carrying out heat engine, and carrying out load cycle working condition test after the outlet temperature of the cooling liquid of the fuel cell engine reaches the temperature value required by the heat engine;
f2, loading the power value of the fuel cell engine to a working condition point P1, and stably operating T1; continuously loading to a power value of a working condition point P2, and stably operating T2; and continuing loading to the rated working condition, and stably operating for T3 time.
Compared with the prior art, the method for testing and evaluating the reliability of the fuel cell system has the following beneficial effects:
the test and evaluation method for the reliability of the fuel cell system provided by the invention defines a test method for the reliability of the proton exchange membrane fuel cell engine, establishes test methods under different working conditions, can cover the application scene of the fuel cell system, can well supplement a standard system of the fuel cell system, fills up the international blank for a reliability test system of the fuel cell engine, improves the adaptability test of a limit environment and the reliability of the fuel cell engine when leaving a factory, and embodies obvious advantages in the aspects of simplicity, reasonableness, authenticity and the like of the test.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a start-stop cycle according to an embodiment of the present invention;
FIG. 2 is a schematic view of a nominal duty cycle according to an embodiment of the present invention;
FIG. 3 is a schematic view of a load cycle according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Requirements of the test equipment: the required accuracy of the measuring instrument is shown in Table 1
TABLE 1 test instruments and accuracy requirements
| Serial number | Measuring instrument | Unit of measurement | Accuracy of measurement |
| 1 | Humidity measuring instrument | ％ | ±3.0％RH |
| 2 | Temperature measuring instrument | ℃ | ±1.0℃ |
| 3 | Pressure measuring instrument | kPa | ±1.0％FS |
| 4 | Fuel mass flowmeter | L/min (in the standard state) | ±1.0％FS |
| 5 | Water (liquid) flowmeter | L/min | ±2.0％FS |
| 6 | Voltage measuring instrument | V | ±0.5％FS |
| 7 | Current measuring instrument | A | ±0.5％FS |
Fuel cell system requirements: the general test requirements during the test are as follows:
parts cannot be replaced randomly in the test process, and the appearance structure and technical parameters of the fuel cell engine when leaving a factory are kept;
the fuel cell engine does not allow the coolant and the humidification water to be supplemented in the test process, and after the test is started, the fuel cell engine does not need to be changed and human intervention is avoided in the test process.
Test items: the test items were performed as in table 2.
TABLE 2 items of reliability testing
Performance initial test:
1. air tightness test
a) Pretreatment of soaking machine
Completing a fuel cell startup and shutdown process before soaking, and standing a fuel cell engine (coolant is filled) in a normal-temperature environment for a sufficient time to ensure that the internal temperature of the fuel cell engine is the same as the ambient temperature, wherein the soaking time is at least 12 hours;
b) single chamber pressure maintaining
Closing an exhaust port of a fuel cell engine, filling detection gas (preferably mixed gas with the volume ratio of nitrogen to helium being 9:1 or nitrogen with the purity being more than 99%) into a hydrogen inlet port of the fuel cell engine, setting the pressure as the working pressure specified by a manufacturer, closing a hydrogen inlet valve after the pressure is stable, keeping the pressure for 20min, and recording the pressure drop value;
c) double-cavity pressure maintaining
Closing an exhaust port, an air exhaust port and a cooling liquid outlet of a fuel cell engine, filling detection gas (preferably mixed gas with the volume ratio of nitrogen to helium being 9:1 or nitrogen with the purity being more than 99%) into a hydrogen flow channel, an air flow channel and a cooling liquid flow channel, setting the pressure as the working pressure specified by a manufacturer, closing an air inlet valve after the pressure is stable, keeping the pressure for 20min, and recording the pressure drop value;
d) determination
The recorded value is higher than the pressure value specified by the manufacturer, and the product is qualified.
2. Steady state characteristic test
a) Test conditions
The fuel cell engine was in a warm engine state prior to testing. The test process is carried out automatically and cannot be intervened manually.
b) Test method
After the heat engine process is finished, returning to an idling state for 10 s;
loading the load to predetermined working condition points (recommending 10% PE, 20% PE, 30% PE, 40% PE, 50% PE, 60% PE, 70% PE, 80% PE, 90% PE and PE) according to a loading mode specified by a manufacturer, and continuously and stably operating each working condition point for at least 3 min;
c) recording data
Current, voltage, hydrogen consumption of the fuel cell engine, voltage, current of the auxiliary system.
Obtaining a polarization characteristic curve (V-I curve) of the fuel cell stack, a power curve of the fuel cell stack and an efficiency curve of the fuel cell stack according to the test data; a power curve of the fuel cell engine, an efficiency curve of the fuel cell engine; power curves of the auxiliary systems, etc.
3. Rated power test
a) Test conditions
The fuel cell engine was in a warm engine state prior to testing. The test process is carried out automatically and cannot be intervened manually.
b) Test method
After the heat engine process is finished, returning to an idling state for 10 s;
and loading the mixture to a rated power working point according to a loading mode specified by a manufacturer, and continuously and stably operating for at least 10 min.
c) Recording data
Time of rated power operation, voltage of the fuel cell engine, current, hydrogen consumption, circuit voltage of the auxiliary system.
4. Insulation resistance test
The megameter range is selected to be 500V when the maximum voltage of the fuel cell engine does not exceed 250V, and 1000V when the maximum operating voltage of the fuel cell engine exceeds 250V but is not higher than 1000V. During measurement, the number should be read after the pointer of the megger or the display value is stable.
And (3) reliability test: the test was carried out according to the test specifications specified below.
The performance retest is the content of the repeated performance initial test, and then is compared with the result of the initial test.
Specification of reliability test
Test items
The method is suitable for factory verification of the fuel cell engine, different engines of the same type are recommended to be used for testing, and test items and running time are shown in table 3
TABLE 3 test specifications and run times
Starting and stopping working condition reliability test: the start-stop test cycle working condition comprises the processes of starting, heating, idling and stopping, the working condition cycle schematic diagram is shown in figure 1, the requirement of the working condition cycle is shown in table 4, and the specific steps are as follows:
a) starting a fuel cell engine according to technical requirements and carrying out heat engine, and carrying out start-stop cycle working condition test after the temperature of a cooling liquid outlet of the fuel cell engine reaches a temperature value required by the heat engine (if the temperature is not required, the temperature is 45 ℃);
b) start-stop each operating mode is operated according to table 4 in proper order: after the fuel cell engine is started, loading to a rated working condition according to the requirements specified by a manufacturer, stopping after the fuel cell engine stably runs for 3min under the rated working condition, rapidly cooling the fuel cell cooling system within the allowable range of the fuel cell engine after stopping, and cooling the coolant outlet to T0.
c) Thus, one cycle is completed for 6min +/-1 min, and 500 cycles are operated.
TABLE 4 Start-stop cycle operating mode table for fuel cell engine
Rated working condition reliability test
The nominal working condition cycle schematic diagram is shown in FIG. 2, and the specific steps are as follows:
a) starting a fuel cell engine according to technical requirements and carrying out heat engine, and carrying out rated working condition test after the water outlet temperature of the fuel cell engine reaches the temperature value required by the heat engine (if no requirement exists, the temperature is 45 ℃);
b) the fuel cell engine stably runs under a rated working condition, each cycle is carried out for 1h, 1000 cycles are carried out totally, the running duration is 1000h, and data are recorded.
Load cycle condition reliability test
The load cycle working condition cycle schematic diagram is shown in figure 3, and the specific steps are as follows:
a) starting a fuel cell engine according to technical requirements and carrying out heat engine, and carrying out load cycle working condition test after the temperature of a cooling liquid outlet of the fuel cell engine reaches a temperature value required by the heat engine (if the temperature is not required, the temperature is 45 ℃);
b) the fuel cell engine is loaded to a working condition point P1 power value, and stably runs T1; continuously loading to a power value of a working condition point P2, and stably operating T2; continuously loading to a rated working condition, and stably operating for T3 time;
c) thus, one cycle is completed for 180min +/-5 min, 100 cycles are operated, and the operation duration is 18000 min.
TABLE 5 Fuel cell Engine load cycle behavior Table
Inspection and maintenance
The general requirements are as follows: the inspection and maintenance are carried out according to the following requirements, but the content and the period can be properly increased and decreased, the inspection result and the maintenance condition should be recorded in detail, and the corresponding test record table is shown in appendix A.
Checking at any time:
the operation data is observed at any time through the setting limit of the testing equipment and a control system of the fuel cell engine, and when the operation data exceeds the limit range, an alarm or an emergency stop is sent out, and the operation data is processed according to the severity of the fault. If the engine fault belongs to the detected fuel cell engine fault, the engine is judged to be fault shutdown. The downtime, cause and handling of the fault are recorded.
Monitoring abnormal movement sound of the moving parts of the fuel cell engine and taking measures if necessary.
Check every 1 h:
the operation data is observed at any time through the setting limit of the testing equipment and a control system of the fuel cell engine, and when the operation data exceeds the limit range, an alarm or an emergency stop is sent out, and the operation data is processed according to the severity of the fault. If the engine fault belongs to the detected fuel cell engine fault, the engine is judged to be fault shutdown. The downtime, cause and handling of the fault are recorded.
Monitoring abnormal movement sound of the moving parts of the fuel cell engine and taking measures if necessary.
Check every 2 h:
the machine is allowed to shut down 1 time, the test equipment is patrolled, and the fasteners, mechanical links and pipes, especially hoses, link cables and interfaces are inspected, in principle only the bench itself is inspected.
The liquid level of the coolant is checked, and the coolant is replenished if necessary, by checking the level of the coolant and whether the coolant leaks.
And (4) checking the surface leakage of the sample, detecting whether hydrogen leakage occurs at the link position or not, and performing sealing treatment if necessary.
The down time does not exceed 1h at most.
And (3) fault and shutdown treatment:
recording the reason and the operation content of each shutdown;
when a fault occurs, fault analysis is carried out, the fault is eliminated, and the fault is recorded.
And (3) finishing test results: evaluation is carried out according to chapter 10, based on the actual duration (h) and the record during operation of the fuel cell engine under test.
And (3) evaluating the reliability:
the actual run time of the tested fuel cell engine should not be below 500 h.
The reliability test faults are evaluated by using average first fault time, fault stop times and fault average interval time.
Mean time between failure MTBF
MTBF — point estimate of mean time between failures in hours (h);
r-total number of faults occurring in T time, no slight fault;
n-total number of fuel cell engine tests;
j-jth system termination test;
k-the number of fuel cell engines at the time of suspension of the test;
t-total time worked, in hours (h);
tj-the jth fuel cell engine system suspension test time in hours (h), not counting minor faults;
te-sequential truncation time, unit is hour (h).
And comparing the performance curves and parameters of the initial test and the retest.
Those of ordinary skill in the art will appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of clearly illustrating the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed method and system may be implemented in other ways. For example, the above described division of elements is merely a logical division, and other divisions may be realized, for example, multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not executed. The units may or may not be physically separate, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A test evaluation method for reliability of a fuel cell system is characterized by comprising the following steps:
s1, performing performance initial test on the reliability of the fuel cell system, and detecting and evaluating the initial performance of the fuel cell system;
s2, performing reliability test on the reliability of the fuel cell system, and detecting whether the fuel cell system meets the actual use requirement;
and S3, retesting the reliability of the fuel cell system, and comparing the retest with the initial performance test result to obtain the performance attenuation condition of the fuel cell system.
2. The method of claim 1, wherein in step S1, the performance initial test includes a gas tightness test, a steady-state load characteristic test, a rated power test, and an insulation test.
3. The test evaluation method for the reliability of the fuel cell system according to claim 1, wherein in step S2, the reliability test includes: start-stop cycle condition test, rated condition test and load cycle condition test.
4. The test evaluation method of the reliability of the fuel cell system according to claim 2, characterized in that the airtightness test comprises the steps of:
a1, pretreatment by using a soaking machine: completing a startup and shutdown process of the fuel cell before soaking, and standing the fuel cell engine in a normal-temperature environment to ensure that the internal temperature of the fuel cell engine is the same as the ambient temperature;
a2, single-cavity pressure maintaining: closing an exhaust port of a fuel cell engine, filling detection gas into a hydrogen inlet port of the fuel cell engine, setting the pressure as a working pressure specified by a manufacturer, closing a hydrogen inlet valve after the pressure is stable, keeping the pressure, and recording a pressure drop value;
double-cavity pressure maintaining: closing an exhaust port, an air exhaust port and a cooling liquid outlet of the fuel cell engine, simultaneously filling detection gas into a hydrogen flow channel, an air flow channel and a cooling liquid flow channel, setting the pressure as the working pressure specified by a manufacturer, closing an air inlet valve and keeping the pressure after the pressure is stable, and recording the pressure drop value;
a3, if the recorded descending value is higher than the pressure value specified by the manufacturer, the item is qualified.
5. The method for testing and evaluating the reliability of the fuel cell system according to claim 2, wherein the steady-state load characteristic test is performed when the fuel cell engine is in a thermal engine state, and the method comprises the following steps:
b1, after the heat engine process is finished, returning to the idling state for running, loading to a predetermined working condition point according to a loading mode specified by a manufacturer, and continuously and stably running for a set time at each working condition point;
and B2, recording the current, the voltage and the hydrogen consumption of the fuel cell engine and the voltage and the current of the auxiliary system, and obtaining a polarization characteristic curve of the fuel cell stack, a power curve of the fuel cell stack, an efficiency curve of the fuel cell stack, a power curve of the fuel cell engine, an efficiency curve of the fuel cell engine and a power curve of the auxiliary system according to the test data.
6. The method for testing and evaluating the reliability of the fuel cell system according to claim 1, wherein a rated power test is performed while the fuel cell engine is in a heat engine state, comprising the steps of:
c1, after the heat engine process is finished, returning to the idling state for running, loading to a working condition point of rated power according to a loading mode specified by a manufacturer, and continuously and stably running for a set time;
c2, recording the time of rated power operation, the voltage of the fuel cell engine, the current, the hydrogen consumption, the circuit voltage of the auxiliary system.
7. The method for testing and evaluating the reliability of the fuel cell system according to claim 1, wherein the start-stop condition reliability test comprises the following steps:
d1, starting the fuel cell engine according to the technical requirements and carrying out heat engine, and carrying out start-stop cycle working condition test after the outlet temperature of the cooling liquid of the fuel cell engine reaches the temperature value required by the heat engine;
d2, operating each working condition in turn according to the preset fuel cell engine start-stop cycle working condition: after the fuel cell engine is started, loading to a rated working condition according to the requirements specified by a manufacturer, stopping after stable operation is carried out for a set time under the rated working condition, rapidly cooling a fuel cell cooling system within the allowable range of the fuel cell engine after stopping, and cooling the outlet temperature of the cooling liquid to the end.
8. The test evaluation method for the reliability of a fuel cell system according to claim 7, characterized in that: in step S2, the reliability tests include start-stop condition reliability tests, rated condition reliability tests, and load cycle condition reliability tests.
9. The method for testing and evaluating the reliability of the fuel cell system according to claim 7, wherein the rated working condition reliability test comprises the following steps:
e1, starting the fuel cell engine according to the technical requirements and carrying out heat engine, and carrying out rated working condition test after the water outlet temperature of the fuel cell engine reaches the temperature value required by the heat engine;
e2, the fuel cell engine stably operates under the rated working condition, each cycle is carried out for a set time, the cycles are carried out for a set number of times, the set duration is operated, and data are recorded.
10. The method for testing and evaluating the reliability of the fuel cell system according to claim 7, wherein the load cycle condition reliability test comprises the following steps:
f1, starting the fuel cell engine according to the technical requirements and carrying out heat engine, and carrying out load cycle working condition test after the outlet temperature of the cooling liquid of the fuel cell engine reaches the temperature value required by the heat engine;
f2, loading the power value of the fuel cell engine to a working condition point P1, and stably operating T1; continuously loading to a power value of a working condition point P2, and stably operating T2; and continuing loading to the rated working condition, and stably operating for T3 time.
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| CN114354198A (en) * | 2021-12-30 | 2022-04-15 | 重庆长安新能源汽车科技有限公司 | Fuel cell engine system durability test method |
| CN114628741A (en) * | 2022-03-15 | 2022-06-14 | 山东国创燃料电池技术创新中心有限公司 | Testing method and testing device for water adding and exhaust of fuel cell engine |
| CN115207418A (en) * | 2022-09-07 | 2022-10-18 | 中国第一汽车股份有限公司 | Method for diagnosing failure of fuel cell membrane electrode and storage medium |
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Application publication date: 20210928 |