SJ/T 10459-1993 English PDF (SJT10459-1993)

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SJ/T 10459-1993: Measurement method for temperature coefficients of solar cell
SJ/T 10459-1993
SJ
ELECTRONIC INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
K 83
SJ/T 10459-93
Measurement method for temperature coefficients of solar
cell
ISSUED ON: DECEMBER 17, 1993
IMPLEMENTED ON: JUNE 01, 1994
Issued by: Ministry of Electronics Industry of PRC
Table of Contents
1 Subject content and scope of application ... 3
2 Normative references ... 3
3 Principles ... 3
4 General provisions for test ... 3
5 Test steps ... 5
6 Data processing and test report ... 6
Appendix A Test system of solar cell temperature coefficient (block diagram)
(Informative)... 7
Appendix B Test report sheet for solar cell temperature coefficient (Informative) ... 8
Additional information ... 9
Measurement method for temperature coefficients of solar
cell
1 Subject content and scope of application
This standard specifies the general requirements, test procedures, calculation methods
for temperature coefficient testing of monocrystalline silicon solar cells (hereinafter
referred to as solar cells).
This standard applies to non-concentrating monocrystalline silicon monomer solar cells,
solar cell modules, solar panels. Non-monocrystalline silicon monomer solar cells can
also make reference to this standard.
2 Normative references
GB 2297 Terminology for solar photovoltaic energy system
GB 6494 Measurement procedures for electrical characteristics of astronautic solar
cells
GB 6495 Measurement procedures for electrical characteristics of terrestrial solar
cells
3 Principles
The electrical performance parameters of solar cells (short-circuit current ISC, open-
circuit voltage VOC, maximum power Pmax, etc.) change with changes in the ambient
temperature of the solar cell. Under constant irradiance, by changing the temperature
of the solar cell, the relationship curve between the electrical performance parameters
of the solar cell and the temperature change is obtained. The temperature coefficient of
the electrical performance parameters of the solar cell is calculated from the slope of
the curve.
4 General provisions for test
4.1 The short-circuit current temperature coefficient αC, open-circuit voltage
temperature coefficient βC, maximum power temperature coefficient γC of the solar cell
are related to the irradiance. The nominal temperature coefficient of solar cells, which
is measured using the irradiance specified in Article 2.1.2 of GB 6494, is suitable for
space applications. The nominal temperature coefficient of solar cells, which is
measured using the irradiance specified in Article 2.1.2 of GB 6495, is suitable for
ground application. The temperature coefficient of solar cells, which is measured under
non-standard irradiance, shall indicate the irradiance value, which is used during the
test.
4.2 The AMO solar simulator is used to test the temperature coefficient of aerospace
solar cells; its characteristics shall comply with the requirements of Article 2.1.2 and
3.1 of GB 6494. The AMl.5 solar simulator is used to test the temperature coefficient
of ground solar cells; its characteristics shall comply with the requirements of Article
2.1.2 and 3.1 of GB 6495.
4.3 Measuring instruments and devices for testing the electrical parameters of solar cells
for aerospace use, shall comply with the requirements of Article 2.2 of GB 6494. The
measuring instruments and devices, for testing the electrical parameters of solar cells
for ground use, shall comply with the requirements of Article 2.2 of GB 6495.
4.4 In order to prevent frost on the surface of the solar cell under test, when the test
temperature is lower than room temperature, during the test, affects the measurement
accuracy, the solar cell under test shall be placed in a vacuum chamber OR protected
by appropriate inert gas.
4.5 The temperature sensor for measuring the temperature of the solar cell is adhered
to the middle of the back of the cell under test, using an adhesive with good thermal
conductivity. The measurement accuracy shall be better than ±0.5 °C.
4.6 The cell under test is pasted on a temperature-controlled test bench, using an
adhesive with good thermal conductivity. The angle between the normal line of the test
plane and the incident light shall not be greater than 5°.
4.7 The standard cell and the cell under test are in the same plane AND within the
effective irradiation area of the simulated light source.
4.8 The circuit block diagram, for measuring the volt-ampere characteristics of solar
cells, shall comply with the requirements in the Figure below.