CN104953949A - Electric performance test method of solar cells and solar cell modules - Google Patents
Electric performance test method of solar cells and solar cell modules Download PDFInfo
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- CN104953949A CN104953949A CN201510352857.4A CN201510352857A CN104953949A CN 104953949 A CN104953949 A CN 104953949A CN 201510352857 A CN201510352857 A CN 201510352857A CN 104953949 A CN104953949 A CN 104953949A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011056 performance test Methods 0.000 title claims abstract description 24
- 230000003595 spectral effect Effects 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 230000001960 triggered effect Effects 0.000 claims abstract description 17
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 230000010354 integration Effects 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 49
- 230000005540 biological transmission Effects 0.000 description 6
- 230000001737 promoting effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Testing Of Individual Semiconductor Devices (AREA)
Abstract
The invention discloses an electric performance test method of solar cells and solar cell modules and belongs to the field of tests on the solar cells. The method is characterized by comprising steps as follows: selecting and evenly distributing light sources with N kinds of wavebands in a test area, and evenly distributing light radiation of all the wavebands; controlling the light sources with the N kinds of wavebands to be triggered simultaneously, and measuring short-circuit currents of to-be-measured objects; performing triggering sequentially for N times in any (N-1) combination manner, and measuring short-circuit currents of missed wavebands in an (N-1) mode each time; corresponding to a standard cell, acquiring short-circuit currents of all the light sources with the wavebands, acquiring absolute spectral responsivity of the to-be-measured objects, performing multiplication and integration on the absolute spectral responsivity and standard solar radiation spectrum distribution to acquire short-circuit current densities, multiplying the short-circuit current densities by effective lighted areas of the to-be-measured objects to acquire short-circuit currents; adjusting total light source output energy according to the short-circuit currents of the to-be-measured objects and modulating loads to finish tests. The electric performance test method of the solar cells and the solar cell modules is easy to operate and suitable for popularization and application, steps are simple, and test results are more accurate.
Description
Technical field
The invention belongs to solar cell field tests, particularly relate to a kind of electric performance test method of solar cell and solar module.
Background technology
Solar cell detects the research and development at solar cell, all plays an important role in production and selling, and the measurement result of electrical property evaluates the whether advanced standard of solar cell production technology, is also the foundation that solar cell enters realm of sale price.
Current, mainstream technology, still by tracing to the source to standard test condition (i.e. STC) by standard solar cell or standard solar cell assembly, realizes transmission of quantity value to realize test by standard solar cell or standard solar cell component calibrates solar simulator.But carrying out in transmission of quantity value process, due to many factors such as solar cell technique or raw materials, cause existing between different solar cell or solar module comparatively significantly spectral response difference, tested solar cell or solar module are only under the condition similar or consistent with the spectral response of standard solar cell or solar module, transmission error solar simulator carrying out introduce in transmission of quantity value process just can be similar to be ignored, test result is relatively reliable, transmission of quantity value can be carried out, and transmission of quantity value requires also can suitably reduce to the Spectral matching of solar simulator in this situation, meet IEC 60904-9 2007 A level spectrum.In actual industrial site environment, all measurands can not be met and all with standard, there is similar or identical spectral response, even can not there is the spectral response similar or identical with standard in measurand, therefore after utilizing standard calibration solar simulator, test measurand again and cannot eliminate calibration difference, namely the test environment calibrated and current test environment cannot be consistent, and the result error now tested under this test condition is unpredictable.
Current, solution for such problem can by promoting the performance index of solar simulator further, especially Spectral matching degree, the matching degree of original 0.75-1.25 is promoted to 0.9-1.1 even higher, but be limited to technical reason Spectral matching forever cannot equal AM1.5G condition really under sunlight.By the decrease value transmit difference that the Key Performance Indicator promoting solar simulator can be suitable, but cannot fundamentally control this difference, in test process, still there is uncontrollable testing differentia.
Summary of the invention
The present invention is intended to for solving the problem, and provides a kind of method accurately detecting the electrical property of solar cell and solar module.
The electric performance test method of a kind of solar cell of the present invention and solar module, comprises the steps:
(1) select the single-range light source of N kind, each wave band light source distribution of radiant energy in test zone is evenly distributed, and the optical radiation energy of the whole wave band of N kind single band light source is also evenly distributed;
(2) control N kind single band light source triggers simultaneously, records the short circuit current lsc of tested solar cell or battery component
n;
(3) combined in the mode of N-1 by different for N kind single-range light source, formula is C (N, 1), triggers N time successively respectively in the mode of N-1 combination in any, triggers the short-circuit current value lsc obtained respectively successively with N kind single band light source simultaneously
nwith the short-circuit current value lsc tested under N-1 pattern
n-1correspondence asks poor, the short circuit current lsc of the single band light source that gained short-circuit current value lacks under being corresponding each N-1 pattern
m, guarantee that often kind of wave band LED all can only once not be triggered;
lsc
m=lsc
n-lsc
n-1;
(4) standard cell is utilized to record short circuit current Isc when N kind wave band light source is triggered simultaneously
nRFF, the absolute spectral response R (λ) that combined standard battery is known
rEF, according to following formula:
Jsc=∫R(λ)×S(λ) dλ （1）
Isc=Jsc×A （2）
Wherein R (λ)---spectral responsivity, unit A/W;
S (λ)---spectral irradiance distributes, unit W/m
2/ nm;
A---measurand effective area of shining light, unit cm
2;
Learn the spectral irradiance S (λ) when N kind wave band light source is triggered simultaneously
n;
The corresponding short circuit current Isc recording standard cell under N-1 pattern
n-1REF, to lack wave band to the short circuit current of standard cell be Isc
mREF=Isc
nREF-Isc
n-1REF, with the spectral irradiance S (λ) of each single band light source under above-mentioned steps successively known N-1 pattern
n-1;
According to obtaining single light source spectral irradiance S (λ) corresponding respectively
n-1, because light output is uniformly distributed, therefore can think that the spectral irradiance arriving standard cell is consistent, therefore according to the short circuit current Isc of gained measurand under N-1 pattern in step (3)
m, according to above-mentioned formula (1) and (2), correspondence tries to achieve the absolute spectral response R (λ) of measurand at different single band light source.
(5) by the R(λ of step (4) gained) and standard A M1.5G solar radiation spectral distribution S (λ), to be multiplied with (2) according to step (4) described formula (1) and integration can obtain short-circuit current density Jsc, then the effective area of shining light A being multiplied by measurand can obtain short circuit current Isc;
(6) calculate the Isc of gained measurand according to step (5), by adjustment N kind wave band light source light output gross energy, guarantee the Isc of measurand
mvalue is the above-mentioned Isc calculated, then can obtain all the other unit for electrical property parameters by load-modulate, completes the electric performance test of solar cell or battery component.
The electric performance test method of solar cell of the present invention and solar module, the wavelength band of described light source is the combination in any between 280nm-1700nm.
The electric performance test method of solar cell of the present invention and solar module, described each wave band light source single band light source that each is triggered when triggering with N-1 pattern keeps constant for the light energy that current constant control pattern or the single band light source that is respectively triggered export when it triggers.
The electric performance test method of solar cell of the present invention and solar module, described light source is solid state LED light source.
The electric performance test method of solar cell of the present invention and solar module, by adopting N kind single band light source, utilize standard cell in two kinds of situations that N kind light source is triggered simultaneously and N-1 pattern triggers, test and calculate the short circuit current of measurand, irradiance difference is determined by comparing with measured value, when adjustment test short circuit current is equal with the short circuit current calculated, all the other unit for electrical property parameters can be obtained, complete the electric performance test of solar cell or battery component with this.The electric performance test method step of solar cell of the present invention and solar module is simple, be easy to operation, standard solar cell or standard solar cell assembly is eliminated to the calibration process of equipment in test process, require to reduce even no requirement (NR) to the Spectral matching of testing equipment, manufacturer or enterprise without the need to frequently by solar cell or solar module sample presentation to third party authority Laboratory Calibration, save calibration cost, also save the expense of preserving standard solar cell or standard solar cell assembly simultaneously, and experimental result is more accurate, be suitable for promoting the use of.
Embodiment
The electric performance test method of a kind of solar cell of the present invention and solar module, comprises the steps:
(1) select N kind single-range light source (N be not less than 1 natural number), each wave band light source distribution of radiant energy in test zone is evenly distributed, and the optical radiation energy of the whole wave band of N kind single band light source is also evenly distributed;
(2) control N kind single band light source triggers simultaneously, records the short circuit current lsc of tested solar cell or battery component
n;
(3) combined in the mode of N-1 by different for N kind single-range light source, formula is C (N, 1), triggers N time successively respectively in the mode of N-1 combination in any, triggers the short-circuit current value lsc obtained respectively successively with N kind single band light source simultaneously
nwith the short-circuit current value lsc tested under N-1 pattern
n-1correspondence asks poor, the short circuit current lsc of the single band light source that gained short-circuit current value lacks under being corresponding each N-1 pattern
m, guarantee that often kind of wave band LED all can only once not be triggered;
lsc
m=lsc
n-lsc
n-1;
(4) standard cell is utilized to record short circuit current Isc when N kind wave band light source is triggered simultaneously
nRFF, the absolute spectral response R (λ) that combined standard battery is known
rEF, the absolute spectral response R (λ) of standard cell
rEFcan be detected by the third-party institution and obtain, according to following formula:
Jsc=∫R(λ)×S(λ) dλ （1）
Isc=Jsc×A （2）
Wherein R (λ)---spectral responsivity, unit A/W;
S (λ)---spectral irradiance distributes, unit W/m
2/ nm;
A---measurand effective area of shining light, unit cm
2;
Learn the spectral irradiance S (λ) when N kind wave band light source is triggered simultaneously
n;
The corresponding short circuit current Isc recording standard cell under N-1 pattern
n-1REF, to lack wave band to the short circuit current of standard cell be Isc
mREF=Isc
nREF-Isc
n-1REF, with the spectral irradiance S (λ) of each single band light source under above-mentioned steps successively known N-1 pattern
n-1;
According to obtaining single light source spectral irradiance S (λ) corresponding respectively
n-1, because light output is uniformly distributed, therefore can think that the spectral irradiance arriving standard cell is consistent, therefore according to the short circuit current Isc of gained measurand under N-1 pattern in step (3)
m, according to above-mentioned formula (1) and (2), correspondence tries to achieve the absolute spectral response R (λ) of measurand at different single band light source.
(5) by the R(λ of step (4) gained) and standard A M1.5G solar radiation spectral distribution S (λ), to be multiplied with (2) according to step (4) described formula (1) and integration can obtain short-circuit current density Jsc, then the effective area of shining light A being multiplied by measurand can obtain short circuit current Isc;
(6) calculate the Isc of gained measurand according to step (5), by adjustment N kind wave band light source light output gross energy, guarantee the Isc of measurand
mvalue is the above-mentioned Isc calculated, then can obtain all the other unit for electrical property parameters by load-modulate, completes the electric performance test of solar cell or battery component.Detailed process is as follows: because Isc only has relation with irradiance, both are linear under normal circumstances, therefore when by after calculating the real Isc of measurand, namely by comparing with measured value, determine irradiance difference, after specifying difference, adjust to the amount of needs by the loop current value of each wave band light source of automatic Modulation.As the Isc of test
mwith calculate Isc complete equal time, now electronic load is progressively modulated to off state by short-circuit condition and can obtains all the other unit for electrical property parameters, complete the electric performance test of solar cell or battery component.
The electric performance test method of solar cell of the present invention and solar module, the wavelength band of described light source is the combination in any between 280nm-1700nm.Solar cell has spectrum-selectivity characteristic, and the solar cell of crystalline silicon substrate has response to 300-1100nm wave band usually, and below 300nm compound is contributed without electric energy, and the basic full impregnated mistake of 1100nm back segment, also contributes without electric energy; But multijunction cell can respond 1700nm.
The electric performance test method of solar cell of the present invention and solar module, described each wave band light source single band light source that each is triggered when triggering with N-1 pattern keeps constant for the light energy that current constant control pattern or the single band light source that is respectively triggered export when it triggers.
The electric performance test method of solar cell of the present invention and solar module, described light source is solid state LED light source, and light source also can be the laser in combination of different-waveband, or is combined by Halogen lamp LED and xenon lamp.
Claims (4)
1. an electric performance test method for solar cell and solar module, is characterized in that comprising the steps:
(1) select the single-range light source of N kind, each wave band light source distribution of radiant energy in test zone is evenly distributed, and the optical radiation energy of the whole wave band of N kind single band light source is also evenly distributed;
(2) control N kind single band light source triggers simultaneously, records the short circuit current lsc of tested solar cell or battery component
n;
(3) combined in the mode of N-1 by different for N kind single-range light source, formula is C (N, 1), triggers N time successively respectively in the mode of N-1 combination in any, triggers the short-circuit current value lsc obtained respectively successively with N kind single band light source simultaneously
nwith the short-circuit current value lsc tested under N-1 pattern
n-1correspondence asks poor, the short circuit current lsc of the single band light source that gained short-circuit current value lacks under being corresponding each N-1 pattern
m, guarantee that often kind of wave band LED all can only once not be triggered;
lsc
m=lsc
n-lsc
n-1;
(4) standard cell is utilized to record short circuit current Isc when N kind wave band light source is triggered simultaneously
nRFF, the absolute spectral response R (λ) that combined standard battery is known
rEF, according to following formula:
Jsc=∫R(λ)×S(λ) dλ （1）
Isc=Jsc×A （2）
Wherein R (λ)---spectral responsivity, unit A/W;
S (λ)---spectral irradiance distributes, unit W/m
2/ nm;
A---measurand effective area of shining light, unit cm
2;
Learn the spectral irradiance S (λ) when N kind wave band light source is triggered simultaneously
n;
The corresponding short circuit current Isc recording standard cell under N-1 pattern
n-1REF, to lack wave band to the short circuit current of standard cell be Isc
mREF=Isc
nREF-Isc
n-1REF, with the spectral irradiance S (λ) of each single band light source under above-mentioned steps successively known N-1 pattern
n-1;
According to obtaining single light source spectral irradiance S (λ) corresponding respectively
n-1, because light output is uniformly distributed, therefore can think that the spectral irradiance arriving standard cell is consistent, therefore according to the short circuit current Isc of gained measurand under N-1 pattern in step (3)
m, according to above-mentioned formula (1) and (2), correspondence tries to achieve the absolute spectral response R (λ) of measurand at different single band light source;
(5) by the R(λ of step (4) gained) and standard A M1.5G solar radiation spectral distribution S (λ), to be multiplied with (2) according to step (4) described formula (1) and integration can obtain short-circuit current density Jsc, then the effective area of shining light A being multiplied by measurand can obtain short circuit current Isc;
(6) calculate the Isc of gained measurand according to step (5), by adjustment N kind wave band light source light output gross energy, guarantee the Isc of measurand
mvalue is the above-mentioned Isc calculated, then can obtain all the other unit for electrical property parameters by load-modulate, completes the electric performance test of solar cell or battery component.
2. the electric performance test method of solar cell according to claim 1 and solar module, is characterized in that the wavelength band of described light source is the combination in any between 280nm-1700nm.
3. the electric performance test method of solar cell according to claim 1 and 2 and solar module, is characterized in that described each wave band light source single band light source that each is triggered when triggering with N-1 pattern keeps constant for the light energy that current constant control pattern or the single band light source that is respectively triggered export when it triggers.
4. the electric performance test method of solar cell according to claim 3 and solar module, is characterized in that described light source is solid state LED light source.
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Cited By (1)
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| CN104953949B (en) | 2017-12-29 |
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