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  • 1
    Publication Date: 2013-08-31
    Description: The measurement system requirements to obtain accurate electrical performance measurements of amorphous silicon cells and modules were described. The progress achieved in modifying the Jet Propulsion Laboratory (JPL) system toward that objective were reviewed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Proceedings of the 26th Project Integration Meeting; p 491-496
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  • 2
    Publication Date: 2016-03-08
    Description: A flexible solar array strip is formed by providing printed circuitry between flexible layers of a nonconductive material, depositing solder pads on the printed circuitry, and storing the resulting substrate on a drum from which it is then withdrawn and advanced along a linear path. Solderless solar cells are serially transported into engagement with the pads and are infrared radiation to melt the solder and attach the cells to the circuitry. Excess flux is cleaned from the solar cells which are then encapsulated in a protective coating. The resulting array is then wound on a drum.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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  • 3
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    In:  CASI
    Publication Date: 2016-06-07
    Description: The use of secondary calibration in large area pulsed solar simulators (LAPSS) is discussed. It is argued that primary calibration in sunlight is time consuming, that only a limited sun calibration of a set of primary reference cells is required, that the LAPSS light source is filtered to closely match the am 1.5 direct spectrum, and that the temperal stability of the filtered LAPSS is excellent. There is the possibility of a lower error rate. Lower costs are anticipated.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the 24th Project Integration Meeting; p 663-668
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  • 4
    Publication Date: 2016-03-08
    Description: A flexible solar array strip is formed by a method which lends itself to automatic production techniques. Solder pads are deposited on printed circuitry deposited on a flexible structure. The resultant substrate is stored on a drum from which it is withdrawn and incrementally advanced along a linear path. Solderless solar cells are serially transported into engagement with the pads which are then heated in order to attach the cells to the circuitry. Excess flux is cleaned from the cells which are encapsulated in a protective coating. The resultant array is then spirally wound on a drum.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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  • 5
    Publication Date: 2016-03-08
    Description: A machine is described for attaching solar cells to a flexable substrate on which printed circuitry has been deposited. The strip is fed through: (1) a station in which solar cells are elevated into engagement with solder pads for the printed circuitry and thereafter heated by an infrared lamp; (2) a station at which flux and solder residue is removed; (3) a station at which electrical performance of the soldered cells is determined; (4) a station at which an encapsulating resin is deposited on the cells; (5) a station at which the encapsulated solar cells are examined for electrical performance; and (6) a final station at which the resulting array is wound on a takeup drum.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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  • 6
    Publication Date: 2016-06-07
    Description: The development of the capability for measurement under global irradiance spectral distribution is reported. The airmass 1.5 global measurement procedure is given. Also given is the procedure and justification for using the large area pulsed solar simulator (LAPSS). The status of the international round robin of reference cell measurements managed by the Commission of European Communities (CEC) is described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Proceedings of the 25th Project Integration Meeting; p 641-648
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  • 7
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    In:  CASI
    Publication Date: 2019-06-28
    Description: The Large Area Pulsed Solar Simulator (LAPSS) has been installed at JPL. It is primarily intended to be used to illuminate and measure the electrical performance of photovoltaic devices. The simulator, originally manufactured by Spectrolab, Sylmar, CA, occupies an area measuring about 3 m wide x 12 m long. The data acquisition and data processing subsystems have been modernized. Tests on the LAPSS performance resulted in better than plus or minus 2 percent uniformity of irradiance at the test plane and better than plus or minus 0.3 percent measurement repeatability after warm-up. Glass absorption filters reduce the ultraviolet light emitted from the xenon flash lamps. This results in a close match to three different standard airmass zero and airmass 1.5 spectral irradiances. The 2-ms light pulse prevents heating of the device under test, resulting in more reliable temperature measurements. Overall, excellent electrical performance measurements have been made of many different types and sizes of photovoltaic devices. Since the original printing of this publication, in 1993, the LAPSS has been operational and new capabilities have been added. This revision includes a new section relating to the installation of a method to measure the I-V curve of a solar cell or array exhibiting a large effective capacitance. Another new section has been added relating to new capabilities for plotting single and multiple I-V curves, and for archiving the I-V data and test parameters. Finally, a section has been added regarding the data acquisition electronics calibration.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-197339 , JPL-PUBL-93-22-REV-A , NAS 1.26:197339
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  • 8
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    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: A Large Area Pulsed Solar Simulator (LAPSS) has been installed at JPL. It is primarily intended to be used to illuminate and measure the electrical performance of photovoltaic devices. The simulator, originally manufactured by Spectrolab, Sylmar, California, occupies an area measuring about 3 meters wide by 12 meters long. The data acquisition and data processing subsystems have been modernized. Tests on the LAPSS performance resulted in better than +/- 2 percent uniformity of irradiance at the test plane and better than +/- 0.3 percent measurement repeatability after warm-up. Glass absorption filters are used to reduce the level of ultraviolet light emitted from the xenon flash lamps. This provides a close match to standard airmass zero and airmass 1.5 spectral irradiance distributions. The 2 millisecond light pulse prevents heating of the device under test, resulting in more reliable temperature measurements. Overall, excellent electrical performance measurements have been made of many different types and sizes of photovoltaic devices.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-194507 , JPL-PUBL-93-22 , NAS 1.26:194507
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