GB/T 31035-2014 English PDF (GBT31035-2014)

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GB/T 31035-2014: Test methods for proton exchange membrane fuel cell stack at subzero environment
GB/T 31035-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.070
K 82
Test methods for proton exchange membrane
fuel cell stack at subzero environment
ISSUED ON. DECEMBER 5, 2014
IMPLEMENTED ON. JULY 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword . 3 
1 Scope .. 4 
2 Normative References . 4 
3 Terms and definitions . 4 
4 General safety requirements . 5 
5 Test conditions . 6 
6 Test platform . 6 
7 Routine tests before low-temperature test . 9 
8 Low-temperature test . 11 
9 Test reports. 16 
Annex A (Informative) Starting procedures . 19 
Annex B (Informative) Shutdown procedures for low-temperature storage
. 20 
Annex C (Informative) Test report . 21 
Test methods for proton exchange membrane
fuel cell stack at subzero environment
1 Scope
This Standard specifies the general safety requirements, test conditions, test
instrument accuracies, routine tests before low temperature test, low temperature test
methods and test reports for proton exchange membrane fuel cell stack in the subzero
environment (below 0°C).
This Standard applies to tests for the storage, starting and working performance of
proton exchange membrane cell stack in the subzero environment (below 0°C).
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to This Standard.
GB/T 28816, Fuel cell - Terminology
GB/T 20042.2-2008, Proton exchange membrane fuel cell - General technical
specification of fuel cell stacks
3 Terms and definitions
For the purposes of this document, the following terms, and those defined in GB/T
28816, apply.
3.1
climate chamber
Equipment in which fuel cell stack to be tested can be placed to control temperature
and humidity stably as required by tests.
3.2
coolant
Conduct operating training for the personnel of fuel cell stack test to enable them to be
experienced in the operation of fuel cell stack test system and know the safety
operating procedures in the fuel cell stack test (including electrical equipment
operation, chemical reaction and compressed gas). The safety operation of fuel cell
stack test platform requires appropriate technical training and experiences as well as
safety facilities and equipment. However, above-mentioned content is not within the
scope of this Standard.
5 Test conditions
When test is conducted, test conditions shall comply with the specifications as follows.
-- environment temperature. room temperature 25°C, low-temperature environment
temperatures 0°C, - 5°C, - 10°C, - 20°C, - 30°C, - 40°C. In a specific test, all
parties of the test shall agree on environment temperature adopted for the test
in accordance with test objective, controlling the error of environment
temperature within the scope of ± 1°C;
-- test environment air pressure. 86 kPa ~ 106 kPa.
Preparatory work before test.
For the leakage test of fuel cell stack, conduct gas leakage test for fuel cell stack as
specified in 5.2 of GB/T 20042.2-2008; the external and internal leakage of fuel cell
stack shall not exceed the maximum leakage amount specified by the manufacturer;
and the differential pressure between two sides of the diaphragm in fuel cell stack shall
not exceed the maximum differential pressure specified by the manufacturer.
6 Test platform
6.1 Test equipment and requirements
The low-temperature climate chamber for fuel cell stack test and the platform for fuel
cell stack test shall comply with the following requirements.
-- the low-temperature climate chamber
The low-temperature climate chamber shall be capable of satisfying the low-
temperature environment conditions, temperature uniformity inside the chamber
and temperature control accuracy (set temperature ± 2°C), which meet test
requirements. The interfaces of supply gas, coolant and circuit are located inside
the climate chamber to ensure the gas temperature at the intake of air and fuel
of fuel cell stack is the set environment temperature. Hydrogen alarms and air
outtakes shall be provided inside the chamber to ensure the safety of test.
-- the fuel cell stack test platform, it shall have the following functions.
 reactant gas flow regulation. measuring the flow rate of fuel and oxidizing
agent gas of fuel cell stack under the stoichiometric ratio required.
 reactant gas humidification control. humidifying reactant gas before delivering
gas to fuel cell stack to achieve the dew point required.
NOTE. The gas transfer line between humidifier and cell can be heated to at least
5°C ~ 10°C above dew point temperature to minimize condensation. In order to lower
heat loss, the section of line shall be heat insulated.
 reactant gas pressure control. regulating the pressure intensity of intake
reactant gas of fuel cell stack.
 load control. loading fuel cell stack to the current specified. Load control shall
be capable of operating both in the constant current mode and in the constant
voltage or constant power modes.
 fuel cell stack temperature monitoring. monitoring the temperature of fuel cell
stack as required by the manufacturer (it is recommended that the
temperature monitoring values of the central and edge positions of fuel cell
stack be provided, i.e. the maximum temperature and minimum temperature
inside stack).
 monitoring and data acquisition instruments of the current, voltage and power
of fuel cell stack. measure and record the current, voltage and power of fuel
cell stack in real time during test.
 applied power consumption control. provide the applied power consumption
required by fuel cell stack as required by the manufacturer, including auxiliary
electric/thermal energy consumption and gas-coolant usage.
 test platform control. test platform shall be capable of controlling and
recording test parameters in real time.
 safety system. safety system shall be capable of monitoring cell stack alarms
and stopping test automatically. It is recommended that anode-cathode lines
have inert gas purging capability. It is also recommended that real-time linked
protective function be provided for the voltage, pressure intensity and
temperature of high/low monocell and gas leakage. And meanwhile,
appropriate ventilation equipment shall be provided.
6.2 Test instruments and precisions
The test instruments and precision requirements are as follows.
a) the instruments measuring environmental conditions. barometers, hygrometers
and temperature sensors;
b) the instruments measuring fuel conditions. fuel flowmeters, pressure sensors,
Conduct the blow-by test for the fuel cavity, oxidizing agent cavity and cooling agent
cavity of fuel cell stack as specified in 5.6 of GB/T 20042.2-2008.
7.7 Differential pressure test
Conduct the differential pressure test for fuel cell stack as specified in 5.10 of GB/T
20042.2-2008.
7.8 Starting test
In accordance with the starting procedures specified by the manufacturer of fuel cell
stack, conduct the starting test for fuel cell stack; and record respectively. the time
required from the cold sta...