GB/T 38914-2020 PDF English
US$145.00 · In stock · Download in 9 secondsGB/T 38914-2020: Evaluation method for lifetime of proton exchange membrane fuel cell stack in vehicle application Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 38914-2020 | English | 145 |
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Evaluation method for lifetime of proton exchange membrane fuel cell stack in vehicle application
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GB/T 38914-2020: Evaluation method for lifetime of proton exchange membrane fuel cell stack in vehicle application
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT38914-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.070
K 82
Evaluation method for lifetime of proton exchange
membrane fuel cell stack in vehicle application
Issued on. JUNE 02, 2020
Implemented on. DECEMBER 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Test equipment and conditions... 5
4.1 Test object... 5
4.2 Test platform and test object installation... 6
4.3 Test environment and basic requirements... 7
4.4 Special requirements... 7
5 Test method of lifetime... 8
5.1 General... 8
5.2 Activation, testing and stability assessment... 8
5.3 Test based on working conditions... 10
5.4 Power generation performance test at the end of lifetime test... 17
5.5 Determination of the cycle condition spectrum... 17
5.6 Performance decay rate and calculation of fuel cell’s lifetime... 18
6 Evaluation report... 19
References... 21
1 Scope
This standard specifies the test and calculation method of the lifetime of the
proton exchange membrane fuel cell stack in vehicle application.
This standard applies to the test and evaluation of the lifetime of the proton
exchange membrane fuel cell stack for road vehicles and non-road vehicles.
Note. This standard does not consider the impact of the difference in ambient
air quality between the laboratory and the road.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 20042.1 Proton exchange membrane fuel cell - Part 1.Terminology
GB/T 23645-2009 Test methods of fuel cell power system for passenger cars
GB/T 28183-2011 Test methods of fuel cell power system for bus
GB/T 29838-2013 Fuel cell modules
GB/T 36288-2018 Fuel cell electric vehicles - Safety requirement of fuel cell
stack
3 Terms and definitions
The terms and definitions as defined in GB/T 20042.1, GB/T 23645-2009, GB/T
28183-2011, GB/T 29838-2013 as well as the following terms and definitions
apply to this document.
3.1
Idling current
The output current of the tested fuel cell stack corresponding to the fuel cell
stack of the on-board fuel cell system under idling conditions. Under this
current, the fuel cell stack can maintain the fuel cell system itself for a certain
period of time, without outputting power externally.
3.2
Rated current
The output current of the tested fuel cell stack corresponding to the fuel cell
stack of the on-board fuel cell system under the rated operating conditions.
Under this current, the fuel cell stack can maintain operation for a certain
period of time.
3.3
Reference current condition
Working conditions based on a specific current in the evaluation of the
lifetime of fuel cell.
3.4
Operation mode cycle
The change history of operating conditions of the fuel cell stack during
continuous operation from startup to shutdown of the tested fuel cell stack
corresponding to the on-board fuel cell system.
4 Test equipment and conditions
4.1 Test object
The test object is generally a single fuel cell stack or a combination of multiple
fuel cell stacks. The tested cell stack, internal membrane electrodes and bipolar
plates have the same structural dimensions and materials as the actual fuel cell
stack.
4.2 Test platform and test object installation
The main measuring devices and measuring accuracy are as shown in Table 1.
4.3 Test environment and basic requirements
The specified test environmental conditions are as follows. the altitude does not
exceed 1000 m; the ambient temperature is 5 °C ~ 40 °C; the laboratory and
outdoor shall be kept ventilated.
Basic requirements. The purity of the hydrogen used shall not be less than
99.97%, which meets the requirements of GB/T 37244-2018.
4.4 Special requirements
The test evaluation of the fuel cell stack shall be carried out in accordance with
the following provisions.
5 Test method of lifetime
5.1 General
It is required to complete the following tests in sequence. It shall not adjust the
test sequence. Unless otherwise specified. The loading and unloading process
is generally completed according to the control method required by the client.
When an unexpected shutdown occurs, the fuel cell stack’s voltage shall be
reduced to below 0.3 V in each segment in time.
5.2 Activation, testing and stability assessment
5.2.1 Activation of fuel cell stack
Activate the fuel cell stack according to the method specified by the client.
5.2.2 Test of fuel cell stack performance and determination of current
parameters
5.2.3 Assessment of fuel cell stack stability and determination of initial
voltage V0
Perform 100 h operation according to Figure 2 and Table 2.The operating
condition spectrum is as follows. start and stop 1 time per hour, apply load 27
times, idle speed 21 min, rated working condition 18 min. Every 4 hours of
operation of fuel cell stack, shut down for 1 hour.
5.3.5 Start-stop conditions
Add 7 times of start-stop in the middle of the variable load test cycle. Split it into
8 stages to complete; every about 30 minutes is a small "start-variable load-
stop" cycle, as shown in Figure 6.A complete cycle of testing includes 8 start-
stop, 217 loading, rated operating time of 738 s, idle time of 3680 s, of which
maintain 90 s after the last loading to the reference current condition, record of
voltage. Table 6 is the operating procedures of test cycle.
6 Evaluation report
The evaluation report shall include the following.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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