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GB/T 23751.2-2017 English PDF (GBT23751.2-2017)

GB/T 23751.2-2017 English PDF (GBT23751.2-2017)

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GB/T 23751.2-2017: Micro fuel cell power systems -- Part 2: Performance test methods

This Part of GB/T 23751 provides performance test methods for the evaluation of micro fuel cell power systems for portable computers, mobile phones, personal digital assistants (handheld computers), home wireless appliances, television broadcast cameras, and autonomous robots, etc.
GB/T 23751.2-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.070
K 82
GB/T 23751.2-2017 / IEC 62282-6-200:2012
Replacing GB/T 23751.2-2009
Micro fuel cell power systems - Part 2: Performance test
methods
(IEC 62282-6-200:2012, Fuel cell technologies - Part 6-200: Micro fuel cell power systems - Performance test methods, IDT)
ISSUED ON: JULY 12, 2017
IMPLEMENTED ON: FEBRUARY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 6
3 Terms and definitions... 6
4 General principles ... 7
5 Test ... 9
6 Marking and labeling ... 14
7 Test report ... 14
Micro fuel cell power systems - Part 2: Performance test
methods
1 Scope
This Part of GB/T 23751 provides performance test methods for the evaluation of micro fuel cell power systems for portable computers, mobile phones, personal digital assistants (handheld computers), home wireless appliances, television broadcast cameras, and autonomous robots, etc.
This Part introduces the performance test methods for the power characteristics, fuel consumption and mechanical durability of micro fuel cell power systems with an output not exceeding 60V DC and 240 W. The functional arrangement of a typical micro fuel cell power system that is evaluated according to this Part is shown in Figure 1. This Part does not address the safety issues of micro fuel cell power systems. This Part does not address the interchangeability of micro fuel cell power systems. 2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 28816-2012, Fuel cell - Terminology (IEC/T S62282-1:2010, IDT)
IEC 60068-2-6, Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal)
IEC 60721-3-7, Classification of environmental conditions - Part 3-7: Classification of groups of environmental parameters and their severities - Portable and non- stationary use
ISO 4677-1, Atmospheres for conditioning and testing - Determination of relative humidity - Part 1: Aspirated psychrometer method
ISO 4677-2, Atmospheres for Conditioning and Testing - Determination of Relative Humidity - Part 2: Whirling Psychrometer Method
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
3 Terms and definitions
Terms and definitions determined by GB/T 28816-2012, and the following ones are applicable to this document.
3.1
conditioning
An operation where, before the performance test, the micro fuel cell power system in standby state is placed in the test environment for a period of time to adjust the system to the specified test conditions.
3.2
micro fuel cell power system
DC power supply powered by fuel cells, including a fuel container, which provides a DC output voltage not exceeding 60 V and an output power of 240 W, and is connected to a hand-held or portable electrical device, such as a portable computer, mobile phone, personal digital assistant (PDA), home wireless appliance, television broadcast camera -- Time: ±1%;
-- Mass: ±1%;
-- Temperature: ±2 °C;
-- Humidity: ±5%;
-- Pressure: ±5%;
-- Vibration frequency: ±1 Hz (5 Hz < frequency ≤ 50 Hz) or ±2% (frequency > 50 Hz);
-- Volume: ±2%.
4.3 Measuring instruments
4.3.1 General
Measuring instruments shall be determined according to the required accuracy and the range of the measured value. Measuring instruments shall be calibrated periodically to maintain the level of accuracy specified in 4.2. With reference to ISO/IEC 17025, calibration information shall be described in the test report. Instruments for measuring voltage and current shall be capable of continuously recording values throughout the measurement process.
4.3.2 Voltage
The accuracy specified in 4.2 above shall be guaranteed. The internal resistance of the voltage measuring instrument shall be greater than or equal to 1 MΩ.
4.3.3 Current
The accuracy specified in 4.2 above shall be guaranteed.
4.3.4 Time
The time measuring instrument shall have an accuracy of ±1 s/h or higher, so as to ensure the measurement accuracy specified in 4.2.
4.3.5 Mass
The accuracy specified in 4.2 above shall be guaranteed. The measurement of mass shall be carried out in accordance with relevant national standards, industry norms or norms of relevant organizations.
4.3.6 Temperature
The accuracy specified in 4.2 above shall be guaranteed. Recommended instruments for direct measurement of ambient temperature are:
a) Thermocouple with sensor; or
b) Resistance thermometer with sensor.
4.3.7 Humidity
The accuracy specified in 4.2 above shall be guaranteed. Refer to the requirements of ISO 4677-1 and ISO 4677-2 for the measurement of ambient humidity.
4.3.8 Pressure
The accuracy specified in 4.2 above shall be guaranteed. The measurement of pressure shall be carried out in accordance with relevant national standards, industry norms or norms of relevant organizations. If neither is available, the relevant organization shall create a stress measurement standard or specification for this performance test. 4.3.9 Vibration frequency
The accuracy specified in 4.2 above shall be guaranteed. Refer to the requirements of GB/T 2423.10 for the vibration frequency.
4.3.10 Volume
The accuracy specified in 4.2 above shall be guaranteed.
5 Test
5.1 Test procedures
Each test shall be performed on 3 samples. The conditioning of samples shall be carried out at least 2 h before the start of the test, so as to adjust the sample to meet the test environmental conditions; the test shall be started immediately after conditioning. Unless otherwise specified, the micro fuel cell power system shall be connected to the voltmeter and load specified by the manufacturer, so that it can operate at rated power or rated current; the measurement shall last for 1 h or according to the time specified by the manufacturer, so as to observe characteristics of the micro fuel cell power system in actual operation. Throughout the measurement process, data shall be recorded at the sampling frequency specified by the manufacturer. The reported test measurement value shall be the average of the average measurement values of 3 samples, wherein the average measurement value of each sample is the average value of the recorded data of the sample. These tests can be performed sequentially using one set of samples, or simultaneously using different sets of samples. Electrical parameter measurements shall be taken at the power interface.
5.2.4 Power generation test under low temperature and high temperature
conditions
a) The purpose of this test is to confirm the performance of the micro fuel cell power system under low temperature and high temperature conditions.
b) The test temperature shall be the minimum and maximum operating temperature specified by the manufacturer. At the beginning of the test, the rechargeable battery or capacitor (optional) shall be fully charged, and the sample's internal reservoir or fuel container shall also be full. The sample shall be subjected to conditioning under the test temperature conditions in accordance with the provisions of 5.1, and then the output voltage shall be measured. The temperature of the test, the load connected and the duration of measurement shall be recorded in the test report.
5.2.5 Power generation test under low humidity and high humidity conditions a) The purpose of this test is to confirm the performance of the micro fuel cell power system under low humidity and high humidity conditions.
b) The humidity for the test shall be specified by the manufacturer at a humidity level below 20% relative humidity and a humidity level above 80% relative humidity. At the beginning of the test, the rechargeable battery or capacitor (optional) shall be fully charged, and the sample's internal reservoir or fuel container shall also be full. The sample shall be subjected to conditioning under the test humidity in accordance with the provisions of 5.1, and then the output voltage shall be measured. The humidity of the test, the connected load and the measurement time shall be recorded in the test report.
5.2.6 Altitude test
a) The purpose of this test is to confirm the performance of the micro fuel cell power system under reduced atmospheric pressure conditions.
b) The test pressure shall be 680 -10 kPa, and the air pressure shall be as close to 68 kPa as possible. At the beginning of the test, the rechargeable battery or capacitor (optional) shall be fully charged, and the sample's internal reservoir or fuel container shall also be full. The sample shall be regulated under the test pressure in accordance with the provisions of 5.1, and then the output voltage shall be measured. The test pressure, the connected load and the measurement time shall be recorded in the test report.
Note: 68 kPa is the minimum standard pressure in the aircraft cabin.
5.3 Fuel consumption test
a) The purpose of this test is to measure the fuel mass provided by the fuel container and consumed by the micro fuel cell power system when the micro fuel cell power system operates continuously under the conditions of rated current or rated power. b) The micro fuel cell power system shall operate at rated current or rated power. If it operates at rated current, the overall fuel consumption, the voltage of the micro fuel cell power system and the duration of power generation shall be measured in accordance with the provisions of 5.1; if it operates at rated power, the overall fuel consumption and the duration of power generation shall be measured. The overall fuel consumption shall be measured in terms of the mass or volume of fuel consumed during the electrical measurement. During the electrical
measurements, the system shall run continuously for at least 2 h in steady state. If it is desired or required to increase the accuracy of the measurement, during the measurement, the sample can run for a longer period of time than that specified by the manufacturer. The fuel consumption per unit time and the electricity generated per unit fuel quantity can be calculated according to the following formula:
Fuel consumption rate:
Fuel consumption per hour (g/h or mL/h) =
Electric energy generated per unit amount of fuel (Wh/g or Wh/mL) =
Where:
P = U × I (running at rated current);
I – rated current;
U – average value of the measured voltage.
Or
P – rated power (running at rated power);
h – hours of electricity generation.
The specifications of the fuel shall be recorded in the test report.
5.4 Mechanical durability test
5.4.1 Drop test

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