CN102385039B - Test method and device for high-light intensity and large-scale solar cell illumination linearity - Google Patents

Test method and device for high-light intensity and large-scale solar cell illumination linearity Download PDF

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CN102385039B
CN102385039B CN 201110233740 CN201110233740A CN102385039B CN 102385039 B CN102385039 B CN 102385039B CN 201110233740 CN201110233740 CN 201110233740 CN 201110233740 A CN201110233740 A CN 201110233740A CN 102385039 B CN102385039 B CN 102385039B
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solar cell
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CN102385039A (en
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杨亦强
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514 Institute of China Academy of Space Technology of CASC
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Abstract

The invention discloses a test method and a test device for high-light intensity and large-scale solar cell illumination linearity, which can accurately test short-circuit current or open circuit voltage illumination linearity when the light intensity variation scale is more than three orders of magnitude and especially under the high light intensity of thousands of solar constants, measurement can be continuously carried out, and light intensity intervals can be freely set. The test device comprises a test light source and a test darkroom, wherein the test light source can generate light pulse; the test darkroom is provided with an orifice window; a light spectrum regulation light filter is arranged behind the orifice window; a beam splitter is aslant arranged; a tested solar cell and a standard solar cell are arranged on the light path of the transmission light of the beam splitter by one group of vertically-arranged neutral attenuation light filters which can be independently movedin or out of the light path; the light path of the reflected light of the beam splitter is provided with a monitoring solar cell through the attenuation light filters; the tested solar cell and the standard solar cell are both fixed on a temperature-control test bench; and the temperature-control test bench is arranged on a guide rail which can cause the temperature-control test bench to move from back and front along the light axis of the light source.

Description

A kind of high light intensity linearity test method of solar cell illumination on a large scale and device
Technical field
The invention belongs to technical field of solar cells, particularly relate to method of testing and the device of a kind of high light intensity solar cell illumination on a large scale linearity.Described high light intensity refers to that light intensity is at 1 solar constant (1367W/m 2) above light intensity, described light irradiance variation range or the light intensity variation range of referring on a large scale is at 3 more than the order of magnitude.
Background technology
Solar cell short-circuit current (or open-circuit voltage) is called solar cell short-circuit current (or open-circuit voltage) the illumination linearity with the variation of intensity of illumination change curve slope.The solar cell illumination linearity is to estimate an important parameter of solar cell performance.For example the illumination linearity of the short-circuit current of required standard solar cell in using range of light intensity should be in ± 2% among the international standard ISO-15387, and open-circuit voltage should be in ± 5% with the linearity of light intensity logarithm.The bad standard solar cell of the linearity will produce serious error to departing to demarcate when the larger light intensity of light intensity is measured.Normally under 1 solar constant, demarcate with standard solar cell for the space, the light intensity that needs in actual use to measure often has larger departing from 1 solar constant, in the application of space: the intensity of solar radiation of Mercury track is about 6.7 solar constants, the intensity of solar radiation of Mars track is about 0.42 solar constant, and the satellite sun sensor test is about 0.1 solar constant with the irradiation intensity of solar simulator; In the Ground Application: the work light intensity of concentrator solar cell is from several solar constants to thousands of solar constants.Therefore, for standard solar cell, need to understand from 0.1 linearity to thousands of solar constant range of light intensity.
Some photodetector linear measurement methods can be used for measuring the illumination linearity of solar cell.The most basic method is in the linearity of shining to calculate detector on the optical track by the distance realization different light intensity between change optical light source and detector photosurface according to inverse square law, yet, the light intensity that realizes based on inverse square law on 6 meters long optical tracks on the one hand changes only has at most tens times, on the other hand, because when lamp and detector pitch were very large, the impact of parasitic light was with fairly obvious; Spacing is too little then will to cause inverse square law to lose efficacy, and therefore, the linear measurement of special highly-sensitive detector implements very difficultly at optical track on a large scale, and precision is difficult to guarantee.Except square distance inverse ratio method, researchers have also proposed the method that several acquisition irradiance increase, as, optical filter or filter set method, the Beer damped method, Polarization Method etc., all limited because of the extra error that the auxiliary quantity measurement is introduced.The most ripe Linear testing method is two light source method of superposition at present, have high reliability and degree of precision, and the light irradiance variation range is expanded greatly.Although two light source method of superposition have high reliability and high precision, but because the each time realization of light source superposition value all will be passed through repeatedly the light source on the mobile optical track, actual mechanical process is very loaded down with trivial details, and requires also higher, not extensive in actual applications to appointed condition.In addition, two light source method of superposition can only obtain the test point of benchmark light intensity even-multiple, and namely test point is discontinuous, and the interval of the larger test point of light intensity is also larger.Also have and a kind ofly utilize the linear measuring system of intelligent opto-electrical detector of integrating sphere mixed light to solve the problem (Xie Yinzhong: the research of the linear measuring system of intelligent opto-electrical detector) of automatic intelligent test based on two light source method of superposition.The light irradiance variation range of all said methods and system all is difficult to reach 3 more than the order of magnitude, the illumination linearity test value in the time of particularly can't obtaining high light intensity (such as 1 more than the solar constant).
Summary of the invention
Defective and deficiency for prior art, the present invention proposes method of testing and the device of a kind of high light intensity solar cell illumination on a large scale linearity, can accurately test the light intensity variation range 3 short-circuit current illumination linearities under the high light intensity at thousands of solar constants particularly more than the order of magnitude, but but both also free setting light intensity interval of continuous coverage.
Technical scheme of the present invention is:
The proving installation of a kind of high light intensity solar cell illumination on a large scale linearity, described high light intensity refers to that light intensity is at 1 solar constant (1367W/m 2) above light intensity, described light irradiance variation range or the light intensity variation range of referring on a large scale is at 3 more than the order of magnitude, it is characterized in that, comprise testing light source and the test darkroom that can produce light pulse, described test darkroom has the aperture window in light source light axis direction, place the spectrum adjusting optical filter behind the aperture window, spectrum adjusting optical filter back slant setting beam splitter will be divided into by the light beam of aperture window weak reflected light and main projection light; On the transmitted light light path of beam splitter, place tested solar cell and standard solar cell through one group of neutrality decay optical filter that can move into separately or shift out light path of vertically placing; On the reflected light light path of beam splitter, place the monitoring solar cell through the decay optical filter; Described tested solar cell and standard solar cell all are fixed on the temperature control test board, and described temperature control test board places and can make it on the mobile guide rail in front and back on the light source light axis direction; Described testing light source comprises the one or more pulse xenon lamps that are connected with the pulse power respectively; The described pulse power connects by computer-controlled synchronous trigger circuit and light source output energy amount control circuit, controls flash time and the light intensity of synchronization flash and the pulse xenon lamp of a plurality of pulse xenon lamps; Described monitoring solar cell, standard solar cell and the solar cell of being connected connect simultaneously by computer-controlled data acquisition processing circuit, gather simultaneously monitoring battery, the short-circuit current of standard solar cell and the short-circuit current of tested solar cell during glistening.
Each pulse xenon lamp has the elliptical mirror of focused beam; Described testing light source also comprises tapered light pipe or the vertebra shape fibre bundle that converges a plurality of pulse xenon lamp optical radiation.
Described temperature control test board connects stepper motor, and described stepper motor connects by computer-controlled mechanical shift control circuit; The neutrality decay optical filter of described neutral decay filter set connects servomotor, and described servomotor connects by computer-controlled mechanical shift control circuit.
Described temperature control test board connects by computer-controlled temperature control circuit.
The method of testing of a kind of high light intensity solar cell illumination on a large scale linearity, described high light intensity refers to that light intensity is at 1 solar constant (1367W/m 2) above light intensity, described light irradiance variation range or the light intensity variation range of referring on a large scale is characterized in that more than the order of magnitude at 3, may further comprise the steps:
1) light pulse that utilizes pulse xenon lamp to produce Millisecond, and by the light source convergence apparatus, the light beam of pulse xenon lamp is focused to the test point light source of high light intensity;
2) the test point light beam of light source with high light intensity is divided into weak reflected light and main transmitted light by light-dividing device, main transmitted light shines on tested solar cell and the standard solar cell through a plurality of neutrality decay filter set that can shift out separately and move into light path, and weak reflected light shines on the monitoring solar cell through the decay optical filter;
3) tested solar cell and standard solar cell being installed in can be along guide rail before and after on the light source light axis direction on the mobile temperature control test board;
4) mobile temperature control test board on light source light axis direction, select suitable neutrality decay optical filter sheet number, flash time and the light intensity of control light source are measured monitoring solar cell, the short-circuit current of standard solar cell and the short-circuit current of tested solar cell simultaneously during glistening; When tested solar cell at the different position L of distance test light source 1And L 2The light intensity at place is respectively E 1And E 2The time, the short-circuit current of the tested solar cell that records is respectively I 1And I 2, then the illumination linearity of tested solar cell is obtained by following formula:
σ = ( I 1 / E 2 I 2 / E 1 - 1 ) × 100 % .
At every turn the glisten difference of light intensity of described pulse xenon lamp is revised by following formula by the short-circuit current of measuring the monitoring solar cell:
I SC = I 1 ( I MR I M )
V OC=V 1-R S(I SC-I 1)
In the formula: I 1, V 1-be short-circuit current, the open-circuit voltage of the tested solar cell of actual measurement;
I SC, V OC-be short-circuit current, the open-circuit voltage of revised tested solar cell;
I M-be the short-circuit current of the monitoring solar cell of actual measurement;
I MRUnder-1 solar constant light intensity condition when the short-circuit current of standard solar cell equals its calibration value, the short-circuit current of the monitoring solar cell that records;
R SThe series resistors inside of-tested solar cell;
Then the illumination linearity of tested solar cell is:
σ = ( I SC 2 / E 2 I SC 1 / E 1 - 1 ) × 100 %
I wherein SC1, I SC2Being respectively tested solar cell is E in light intensity 1And E 2The time the revised short-circuit current of process.
Described tested solar cell is at the different position L of distance test light source 1And L 2The light intensity E at place 1And E 2Draw by following manner:
A) the tested solar cell on the temperature control test board and standard solar cell are all placed the position L suitable apart from light source 1The sheet number of suitable neutral colour filter is selected at the place, carries out flash test, and the light intensity by the regulating impulse xenon lamp makes the short-circuit current of standard solar cell equal its calibration value, and then tested solar cell is L in the position of distance test light source 1The light intensity at place is 1 solar constant E 1Then the temperature control test board is moved a segment distance to position Lx place, then tested solar cell is at the light intensity E of the position of Lx XCan be drawn by following formula:
E x = E 1 L x 2 L 1 2
B) moving into or shift out a slice neutral colour filter, is T such as the transmittance of this optical filter 1, then tested solar cell in the light intensity of the position of Lx is:
When moving into a slice neutral colour filter:
E x T 1 = T 1 E 1 L x 2 L 1 2
When shifting out a slice neutral colour filter:
E x T 1 = 1 T 1 E 1 L x 2 L 1 2
The like, add or shift out N neutral colour filter, then tested solar cell in the light intensity of the position of Lx is:
When moving into N neutral colour filter:
E x T N = T 1 T 2 . . . T N E 1 L x 2 L 1 2
When shifting out N neutral colour filter:
E x T N = 1 T 1 T 2 . . . T N E 1 L x 2 L 1 2
In the formula: T 1, T 2... T N, be respectively the 1st, 2 ... the transmitance of N optical filter, therefore, as long as accurately measure T 1, T 2... T N, L 1, L X, can obtain accurately light intensity E XValue.
Described testing light source comprises a plurality of pulse xenon lamps, when a pulse xenon lamp can't meet the demands high light intensity, trigger simultaneously a plurality of pulse xenon lamps by computer-controlled synchronous trigger circuit, and adopt tapered light pipe or vertebra shape fibre bundle or other light path system the optical radiation of a plurality of pulse xenon lamps to be focused to the test point light source of higher light intensity.
Flash time and light intensity by computer-controlled light source output energy amount control circuit gating pulse xenon lamp; During glistening, gathered simultaneously short-circuit current, the short-circuit current of standard solar cell and the short-circuit current of tested solar cell of monitoring solar cell by computer-controlled data acquisition processing circuit; Control respectively the stepper motor that is connected with neutral colour filter with the temperature control test board by computer-controlled mechanical shift control circuit, the displacement of control temperature control test board and neutral colour filter from light path immigration and shift out; By the tested solar cell on the computer-controlled temperature control circuit monitoring temperature control test board and the temperature variation of standard solar cell.
Technique effect of the present invention:
Proving installation and the method for a kind of high light intensity solar cell illumination on a large scale linearity that the present invention proposes, can accurately test the light intensity variation range 3 short-circuit current illumination linearities under the high light intensity at thousands of solar constants particularly more than the order of magnitude, for example the illumination linearity of the standard solar cell of working under the high power concentrator condition is tested, but get final product also free setting light intensity interval of continuous coverage, can realize that simultaneously computer program-control tests automatically, can carry out effective evaluation to the performance of standard solar cell, also can provide the light intensity modified value of the standard solar cell of the range of light intensity that is applied to work greatly, to the design of standard solar cell, make, screening and application are offered help.
The present invention utilizes pulse xenon lamp to produce the high-energy light pulse of Millisecond as testing light source, when a pulse xenon lamp can't meet the demands high light intensity, can trigger simultaneously a plurality of pulse xenon lamps by synchronous trigger circuit, adopt tapered light pipe, vertebra shape fibre bundle or other light path system that the optical radiation of a plurality of pulse xenon lamps is converged to the aperture window, reaching higher light intensity, so the present invention can measure the short-circuit current illumination linearity under the high light intensity of thousands of solar constants; And can finish test at the millisecond order of magnitude, the intensification of tested solar cell when avoiding high light intensity; The present invention can move into separately or shift out the neutral decay of light path filter set by arranging, enlarged the variation range of light intensity, can obtain the light intensity variation range in the test result of 3 large-scale short-circuit current illumination linearities more than the order of magnitude, and because each optical filter can move into separately and shift out, light intensity test point is free setting continuously; The present invention utilizes the short-circuit current of known standard solar cell under a solar constant light intensity, according to inverse square law, can obtain the accurate light intensity value of tested solar cell when distance light source diverse location, and by the monitoring solar cell at every turn the glisten difference (generally in 3%) of light intensity of light source pulse xenon lamp is revised, elimination is on the impact of measurement result, and short-circuit current that therefore can the tested solar cell of Measurement accuracy is with the variation of light intensity.Whole measurement mechanism is controlled by computing machine, has improved repeatability and the testing efficiency of test test result.
Description of drawings
Fig. 1 is the structural representation of the proving installation of the high light intensity of the present invention solar cell illumination on a large scale linearity.
Reference numeral lists as follows: 1-pulse xenon lamp, 2-reflective mirror, 3-tapered light pipe, 4-aperture window, 5-spectrum adjusting optical filter, 6-beam splitter, the 7-neutral colour filter, the 8-optical filter of decaying, the tested solar cell of 9-, 10-standard solar cell, 11-monitors solar cell, 12-temperature control test board, 13-guide rail, 14-darkroom.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1: the proving installation of a kind of high light intensity solar cell illumination on a large scale linearity, comprise testing light source and the test darkroom that can produce light pulse, this device utilizes pulse xenon lamp 1 to produce the high-energy light pulse of Millisecond as testing light source, each pulse xenon lamp has the oval concave mirror 2 of focused beam, when high light intensity that a pulse xenon lamp can't meet the demands, can trigger simultaneously a plurality of pulse xenon lamps by synchronous trigger circuit, employing tapered light pipe 3 or vertebra shape fibre bundle or other light path system converge the optical radiation of a plurality of pulse xenon lamps, to reach higher light intensity.Test darkroom 14 has aperture window 4 in light source light axis direction, and the luminous energy of pulse xenon lamp focuses on the aperture window in test darkroom, forms the test point light source of a high light intensity; Place spectrum adjusting optical filter 5 behind the aperture window, spectrum adjusting optical filter back slant setting beam splitter 6, the beam splitter 6 that the light beam by aperture window 4 is tilted placement is divided into weak reflected light and main projection light; On the transmitted light light path of beam splitter 6, place tested solar cell 9 and standard solar cell 10 through one group of neutrality decay optical filter 7 that can move into separately or shift out light path of vertically placing; On beam splitter 6 reflected light light paths, place monitoring solar cell 11 through decay optical filter 8; Weak reflected light is through shining behind the decay optical filter on the monitoring solar cell 11, and main transmitted light shines on tested solar cell 9 and the standard solar cell 10 after a plurality of neutrality that can shift out separately and move into light path decay filter set.Tested solar cell 9 and standard solar cell 10 all are fixed on the temperature control test board 12, and temperature control test board 12 places and can make it on the mobile guide rail 13 in front and back on the light source light axis direction.One or more pulse xenon lamps 1 of above-mentioned testing light source be connected with the pulse power respectively; The pulse power connects by computer-controlled synchronous trigger circuit and light source output energy amount control circuit, controls flash time and the light intensity of synchronization flash and the pulse xenon lamp of a plurality of pulse xenon lamps; Monitoring solar cell, standard solar cell and the solar cell of being connected connect simultaneously by computer-controlled data acquisition processing circuit, gather simultaneously monitoring battery, the short-circuit current of standard solar cell and short-circuit current or the open-circuit voltage of tested solar cell during glistening; The neutrality decay optical filter of neutral decay filter set connects servomotor, and servomotor connects by computer-controlled mechanical shift control circuit, and the control optical filter shifts out and move into light path; The temperature control test board connects stepper motor, and stepper motor connects by computer-controlled mechanical shift control circuit, and the displacement of temperature control test board can accurately be controlled by the mechanical shift control circuit that is connected with computing machine; The temperature control test board also connects by computer-controlled temperature control circuit, monitors the temperature variation of tested solar cell and standard solar cell.Therefore the immigration of optical filter in the proving installation, shift out, flash of light and data test, processing and the calculating of the moving forward and backward of temperature control test board, pulse xenon lamp all can be controlled by computer program, realize whole proving installation robotization.
The method of testing of a kind of high light intensity solar cell illumination on a large scale linearity may further comprise the steps:
1) light pulse that utilizes pulse xenon lamp to produce Millisecond, and by the light source convergence apparatus, the light beam of pulse xenon lamp is focused to the test point light source of high light intensity;
2) the test point light beam of light source with high light intensity is divided into weak reflected light and main transmitted light by light-dividing device, main transmitted light shines on tested solar cell and the standard solar cell through a plurality of neutrality decay filter set that can shift out separately and move into light path, and weak reflected light shines on the monitoring solar cell through the decay optical filter;
3) tested solar cell and standard solar cell being installed in can be along guide rail before and after on the light source light axis direction on the mobile temperature control test board;
4) mobile temperature control test board on light source light axis direction, select suitable neutrality decay optical filter sheet number, flash time and the light intensity of control light source are measured monitoring solar cell, the short-circuit current of standard solar cell and the short-circuit current (or open-circuit voltage) of tested solar cell simultaneously during glistening; When tested solar cell at the different position L of distance test light source 1And L 2The light intensity at place is respectively E 1And E 2The time, short-circuit current or the open-circuit voltage of the tested solar cell that records are respectively I 1And I 2(or V 1And V 2), then the illumination linearity of tested solar cell is obtained by following formula:
σ = ( I 1 / E 2 I 2 / E 1 - 1 ) × 100 % - - - ( 1 )
First the temperature control test board is placed an end of guide rail when beginning to test, measurement range is as requested selected the sheet number of neutral colour filter, carry out flash test, light intensity by the regulating impulse xenon lamp makes the short-circuit current of standard solar cell equal its calibration value, at this moment the position of tested solar cell is L1, and light intensity herein is 1 solar constant E 1, obtaining simultaneously one group of light intensity is a solar constant E 1The time short-circuit current, the short-circuit current of standard solar cell and short-circuit current or the open-circuit voltage of tested solar cell of monitoring solar cell.
The temperature control test board is moved a segment distance to Lx along guide rail, carry out short-circuit current, the short-circuit current of standard solar cell and the short-circuit current (or open-circuit voltage) of tested solar cell of the flash test monitoring solar cell that to obtain one group of light intensity be Ex, light intensity herein can be provided by formula (2)
E x = E 1 L x 2 L 1 2 - - - ( 2 )
Mobile temperature control test board and carry out flash test until position L2 successively.
Moving into or shift out a slice neutral colour filter, is T1 such as the transmittance of this optical filter, and then test board locational light intensity of Lx between L1 and L2 is:
Move into:
E x T 1 = T 1 E 1 L x 2 L 1 2 - - - ( 3 )
Shift out:
E x T 1 = 1 T 1 E 1 L x 2 L 1 2 - - - ( 4 )
The like, add or the light intensity that shifts out N neutral colour filter Lx place is:
Move into:
E x T N = T 1 T 2 . . . T N E 1 L x 2 L 1 2 - - - ( 5 )
Shift out:
E x T N = 1 T 1 T 2 . . . T N E 1 L x 2 L 1 2 - - - ( 6 )
In the formula: T 1, T 2... T N, be respectively the 1st, 2 ... the transmitance of N optical filter,
Therefore, as long as accurately measure T 1, T 2... T N, L 1, L XCan obtain accurately light intensity E XValue.
At every turn the glisten difference (generally in 3%) of light intensity of pulse xenon lamp can be revised by the short-circuit current of measuring the monitoring solar cell:
I SC = I 1 ( I MR I M ) - - - ( 7 )
In the formula: I 1---the short-circuit current of the tested solar cell of actual measurement;
I SC---the short-circuit current of revised tested solar cell;
I M---the short-circuit current of the monitoring solar cell of actual measurement;
I MR---under 1 solar constant illumination condition when the short-circuit current of standard solar cell equals its calibration value, the short-circuit current of the monitoring solar cell that records.
If solar cell is respectively E in light intensity 1And E 2The time short-circuit current that records after revising, be respectively I SC1, I SC2, then the linearity of this solar cell is obtained by following formula:
σ = ( I 1 / E 2 I 2 / E 1 - 1 ) × 100 % - - - ( 8 )
Flash time and light intensity by computer-controlled light source output energy amount control circuit gating pulse xenon lamp; During glistening, gathered simultaneously short-circuit current, the short-circuit current of standard solar cell and short-circuit current or the open-circuit voltage data of tested solar cell of monitoring solar cell by computer-controlled data acquisition processing circuit; Control respectively the stepper motor that is connected with neutral colour filter with the temperature control test board by computer-controlled mechanical shift control circuit, the displacement of control temperature control test board and neutral colour filter from light path immigration and shift out; By the tested solar cell on the computer-controlled temperature control circuit monitoring temperature control test board and the temperature variation of standard solar cell.
Should be understood that; the above embodiment can make the invention of those skilled in the art's comprehend; but do not limit the present invention in any way creation; all do not break away from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all is encompassed in the middle of the protection domain of the invention patent.

Claims (9)

1. the proving installation of a high light intensity solar cell illumination on a large scale linearity, described high light intensity refers to that light intensity is at 1 solar constant (1367W/m 2) above light intensity, described light irradiance variation range or the light intensity variation range of referring on a large scale is at 3 more than the order of magnitude, it is characterized in that, comprise testing light source and the test darkroom that can produce light pulse, described test darkroom has the aperture window in light source light axis direction, place the spectrum adjusting optical filter behind the aperture window, spectrum adjusting optical filter back slant setting beam splitter will be divided into by the light beam of aperture window weak reflected light and main projection light; On the transmitted light light path of beam splitter, place tested solar cell and standard solar cell through one group of neutrality decay optical filter that can move into separately or shift out light path of vertically placing; On the reflected light light path of beam splitter, place the monitoring solar cell through the decay optical filter; Described tested solar cell and standard solar cell all are fixed on the temperature control test board, and described temperature control test board places and can make it on the mobile guide rail in front and back on the light source light axis direction; Described testing light source comprises the one or more pulse xenon lamps that are connected with the pulse power respectively; The described pulse power connects by computer-controlled synchronous trigger circuit and light source output energy amount control circuit, controls flash time and the light intensity of synchronization flash and the pulse xenon lamp of a plurality of pulse xenon lamps; Described monitoring solar cell, standard solar cell and the solar cell of being connected connect simultaneously by computer-controlled data acquisition processing circuit, gather simultaneously monitoring battery, the short-circuit current of standard solar cell and the short-circuit current of tested solar cell during glistening.
2. the proving installation of the high light intensity according to claim 1 solar cell illumination on a large scale linearity is characterized in that, each pulse xenon lamp has the elliptical mirror of focused beam; Described testing light source also comprises tapered light pipe or the vertebra shape fibre bundle that converges a plurality of pulse xenon lamp optical radiation.
3. the proving installation of the high light intensity according to claim 1 and 2 solar cell illumination on a large scale linearity is characterized in that, described temperature control test board connects stepper motor, and described stepper motor connects by computer-controlled mechanical shift control circuit; The neutrality decay optical filter of described neutral decay filter set connects servomotor, and described servomotor connects by computer-controlled mechanical shift control circuit.
4. the proving installation of the high light intensity according to claim 1 and 2 solar cell illumination on a large scale linearity is characterized in that, described temperature control test board connects by computer-controlled temperature control circuit.
5. the method for testing of a high light intensity solar cell illumination on a large scale linearity, described high light intensity refers to that light intensity is at 1 solar constant (1367W/m 2) above light intensity, described light irradiance variation range or the light intensity variation range of referring on a large scale is characterized in that more than the order of magnitude at 3, may further comprise the steps:
1) light pulse that utilizes pulse xenon lamp to produce Millisecond, and by the light source convergence apparatus, the light beam of pulse xenon lamp is focused to the test point light source of high light intensity;
2) the test point light beam of light source with high light intensity is divided into weak reflected light and main transmitted light by light-dividing device, main transmitted light shines on tested solar cell and the standard solar cell through a plurality of neutrality decay filter set that can shift out separately and move into light path, and weak reflected light shines on the monitoring solar cell through the decay optical filter;
3) tested solar cell and standard solar cell being installed in can be along guide rail before and after on the light source light axis direction on the mobile temperature control test board;
4) mobile temperature control test board on light source light axis direction, select suitable neutrality decay optical filter sheet number, flash time and the light intensity of control light source are measured monitoring solar cell, the short-circuit current of standard solar cell and the short-circuit current of tested solar cell simultaneously during glistening; When tested solar cell at the different position L of distance test light source 1And L 2The light intensity at place is respectively E 1During with E2, the short-circuit current of the tested solar cell that records is respectively I 1And I 2, then the illumination linearity of tested solar cell is obtained by following formula:
σ = ( I 1 / E 2 I 2 / E 1 - 1 ) × 100 % .
6. the method for testing of the high light intensity according to claim 5 solar cell illumination on a large scale linearity is characterized in that, at every turn the glisten difference of light intensity of described pulse xenon lamp is revised by following formula by the short-circuit current of measuring the monitoring solar cell:
I SC = I 1 ( I MR I M )
V OC=V 1-R S(I SC-I 1)
In the formula: I 1, V 1-be short-circuit current, the open-circuit voltage of the tested solar cell of actual measurement;
I SC, V OC-be short-circuit current, the open-circuit voltage of revised tested solar cell;
I M-be the short-circuit current of the monitoring solar cell of actual measurement;
I MRUnder-1 solar constant light intensity condition when the short-circuit current of standard solar cell equals its calibration value, the short-circuit current of the monitoring solar cell that records;
R SThe series resistors inside of-tested solar cell;
Then the illumination linearity of tested solar cell is:
σ = ( I SC 2 / E 2 I SC 1 / E 1 - 1 ) × 100 %
I wherein SC1, I SC2Being respectively tested solar cell is E in light intensity 1And E 2The revised short-circuit current of process.
7. the method for testing of the high light intensity according to claim 5 solar cell illumination on a large scale linearity is characterized in that, described tested solar cell is at the different position L of distance test light source 1And L 2The light intensity E at place 1And E 2Draw by following manner:
A) the tested solar cell on the temperature control test board and standard solar cell are all placed the position L suitable apart from light source 1The sheet number of suitable neutral colour filter is selected at the place, carries out flash test, and the light intensity by the regulating impulse xenon lamp makes the short-circuit current of standard solar cell equal its calibration value, and then tested solar cell is L in the position of distance test pointolite 1The light intensity at place is 1 solar constant E 1Then the temperature control test board is moved a segment distance to position Lx place, then tested solar cell is at the light intensity E of the position of Lx XCan be drawn by following formula,
E x = E 1 L x 2 L 1 2
B) moving into or shift out a slice neutral colour filter, is T such as the transmittance of this optical filter 1, then tested solar cell in the light intensity of the position of Lx is:
When moving into a slice neutral colour filter:
E x T 1 = T 1 E 1 L x 2 L 1 2
When shifting out a slice neutral colour filter:
E x T 1 = 1 T 1 E 1 L x 2 L 1 2
The like, add or shift out N neutral colour filter, then tested solar cell in the light intensity of the position of Lx is:
When moving into N neutral colour filter:
E x T N = T 1 T 2 . . . T N E 1 L x 2 L 1 2
When shifting out N neutral colour filter:
E x T N = 1 T 1 T 2 . . . T N E 1 L x 2 L 1 2
In the formula: T 1, T 2... T N, be respectively the 1st, 2 ... the transmitance of N optical filter, therefore, as long as accurately measure T 1, T 2... T N, L 1, L X, can obtain accurately light intensity E XValue.
8. the method for testing of the high light intensity according to claim 5 solar cell illumination on a large scale linearity, it is characterized in that, described testing light source comprises a plurality of pulse xenon lamps, when a pulse xenon lamp can't meet the demands high light intensity, trigger simultaneously a plurality of pulse xenon lamps by computer-controlled synchronous trigger circuit, and adopt tapered light pipe or vertebra shape fibre bundle or other light path system the optical radiation of a plurality of pulse xenon lamps to be focused to the test point light source of higher light intensity.
9. according to claim 5 to the method for testing of one of the 8 described high light intensity solar cell illumination on a large scale linearities, it is characterized in that, by computer-controlled light source output can amount control circuit gating pulse xenon lamp flash time and light intensity; During glistening, gathered simultaneously short-circuit current, the short-circuit current of standard solar cell and the short-circuit current of tested solar cell of monitoring solar cell by computer-controlled data acquisition processing circuit; Control respectively the stepper motor that is connected with neutral colour filter with the temperature control test board by computer-controlled mechanical shift control circuit, the displacement of control temperature control test board and neutral colour filter from light path immigration and shift out; By the tested solar cell on the computer-controlled temperature control circuit monitoring temperature control test board and the temperature variation of standard solar cell.
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