PreshipmentInspection of solar panelWord格式文档下载.docx

1、5.1 Inspection steps 65.2 Sampling 75.3 Accept Criteria 75.4 Visual inspection: 75.5 Flash inspection 135.6 EL inspection 146. Loading 156.1 Checklists 166.2 Loading procedure 161. ObjectThis document intends to describe all the inspection works related to solar panel quality control services2. Scop

2、eThis document applies to the inspection of crystalline silicon terrestrial photovoltaic （PV） modules for long-term operation in general open-air climates. 2.1 Type of panel Polycrystalline Monocrystalline Amorph3. Relevant standards2005Photovoltaic （PV） modules Design qualification and type approva

3、l2004Photovoltaic （PV） module safety qualification2007Concentrator photovoltaic （CPV） modules and assemblies Design qualification and type approval2001Recommended practice for qualification of concentrator photovoltaic （PV） receive sections and modulesFlat-plate photovoltaic modules and panels4. Tes

4、t points4.1 Certification test:TestTitleTest conditions4.1.1Visual inspectionSee Detail inspection list in 6.44.1.2Maximum power determinationSince a solar cell has a wavelength-dependent response, its performance is significantly affected by the spectral distribution of the incident radiation, whic

5、h in natural sunlight varies with several factors such as location, weather, time of year, time of day, orientation of the receiving surface, etc., and with a simulator varies with its type and conditions of use. If the irradiance is measured either with a thermopile-type radiometer （that is not spe

6、ctrally selective） or with a reference solar cell, the spectral irradiance distribution of the incoming light must be known in order to make the necessary corrections to obtain the performance of the PV device under the reference solar spectral distribution defined in this standard as specified. It

7、is also possible for a user or array designer, using the spectral response of the cells, to compute within a reasonable tolerance the performance of a PV device when exposed to light of any other known spectral irradiance distribution.4.1.3Insulation testDielectric withstand at 1000 V d.c. + twice t

8、he maximum systems voltage for 1 min.For modules with an area of less than 0.1 m2 the insulation resistance shall be not less than 400M. For modules with an area larger than 0.1m2, the measured insulation resistance times the area of the module shall be not less than 40 Mm2 measured at 500V or maxim

9、um systems voltage, whichever is greater.4.1.4Measurement of temperature coefficientsDetails see IEC 61215Determine the temperature coefficients of current （）, voltage （） and peak power （） from module measurements as specified. The coefficients so determined are valid at the irradiance at which the

10、measurements were made. See evaluation of module temperature coefficients at different irradiance levels. For linear modules, they are also valid over an irradiance range of 30 % of this level.4.1.5Measurement of nominal operating cell temperature（NOCT）Total solar irradiance 800 W m-2Ambient tempera

11、ture: 20Wind seep: 1 ms-14.1.6Performance at STC and NOCTCell temperature: 25 and NOCTIrradiance: 1000 and 800 Wm-2 with IEC 60904-3 reference solar spectral irradiance distributions4.1.7Performance at low irradiance 25Irradiance： 200 Wm-2 with IEC 60904-3 reference solar spectral irradiance distrib

12、ution4.1.8Outdoor exposure test60 kWhm-2 total solar irradiance4.1.9Hot-spot endurance testFive-hour exposure to 1000Wm-2 irradiance in worst-case hot-spot condition4.1.10UV preconditioning test15kWhm-2 total UV irradiation in the wavelength range from 280 nm to 385 nm with 5 kWhm-2 UV irradiation i

13、n the wavelength range from 280 nm to 385 nm4.1.11Thermal cycling test50 to 200 cycles from -40 to +85 with STC peak power current during 200 cycles4.1.12Humidity-freeze test10 cycles from +85,85% RH to -404.1.13Damp-heat test1000h at +85,85% RH4.1.14Robustness of terminations testSee details in IEC

14、 60068-2-214.1.15Wet leakage current testFor modules with an area of less than 0.1m2 the insulation resistance shall be not less than 400M.For modules with an area larger than 0.1m2 the measure insulation resistance times the area of module shall be not less 40 Mm2 to be measured at 500V or maximum

15、system voltage, whichever is greater4.1.16Mechanical load test3 cycles of 2400 Pa uniform load, applied for 1 h to front and back surfaces in turn.Optional snow load of 5400 Pa during last front cycle4.1.17Hail test25mm diameter ice ball at 23ms-1, directed at 11 impact locations4.1.18Bypass diode t

16、hermal testOne houre at ISC and 75One hour at 1.25 times ISC and 754.2.1 Visual inspectionPurpose:Detect any visual defects in the module.Major visual defects:1. Verifying all the elements and the installation2. Broken, cracked, or torn external surfaces, including superstrates, frames and junction

17、boxes3. Bent or misaligned external surfaces, including superstrates, substrates, frames and junction boxes to the extent that the installation and/or operation of the module would be impaired4. A crack in a cell the propagation of which could remove more than 10% of that cells area from the electri

18、cal circuit of the module5. Bubbles or delaminations forming a continuous path between any part of the electrical circuit and the edge of the module6. Loss of mechanical integrity, to the extent that the installation and/or operation of the module would be impaired.4.2.2 Flash testTo confirm the PV

19、panels reliability and the veracity of the flash data report given by from the factory.Equipment:1. A radiant source machine （natural sunlight or a solar simulator class B or better calibrated in accordance with IEC 60904-9）2. A PV reference module （calibrated in accordance with IEC 60904-2 or IEC 6

20、0904-6）3. A temperature detector （calibrated by local lab） which an accuracy of 1 and repeatability of 0.54.2.3 EL testDetect any invisible defects in the module, test specially aimed to detect hidden cracks in the silicon cellsEL RX machine5. Inspection procedure6.1 Inspection stepsNo.Inspection it

21、emsCommentsPicture1Check the flash reportFlash report is a test report given by factory 2Check packing solutionConfirm the packing solution is according to the specification and in good condition3SamplingSelect the quantity of inspection product4Detect any visual defects in the module5Dimension insp

22、ectionConfirm the module is according to the specification6EL inspectionDetect any invisible defects in the module7Power inspectionPower inspection is taken by a flash equipment and shows the performance of product8Loading supervisingInsure the product properly stored before shipping9Inspection pict

23、uresThe records and the traceability of inspection work10Record unqualified modules numberReject product control6.2 SamplingAccording to AQL （Acceptance Quality Limit） & standard of contact & client agreements randomly take samples from each path.6.3 Accept CriteriaAccording to AQL & client requirem

24、ents6.4 Visual inspection:ProcedureCarefully inspect each module under an illumination of not less than 1000 lux for the following conditions:a） Cracked, bent, misaligned or torn external surfaces b） Broken cells c） Cracked cells d） Faulty interconnections or joints e） Cells touching one another or

25、the framef） Failure of adhesive bondsg） Bubbles or delaminations forming a continuous path between a cell and the edge of the moduleh） Tacky surfaces of plastic materialsi） Faulty terminations, exposed live electrical partsj） Any other conditions which may affect performanceBasic requirements （Detai

26、l requirement according the contact and client agreements）Description1.Chipped cell （No more than two （2） chipped cells per module）2.Chipped cell （Max. Total missed surface 0.5 cm2）3.Cell impurities （Foreign conducting particles; Area 4 mm allowed）4.Cell impurities （Foreign non-conducting particles;

27、 Area 10 mm dia. allowed）Bubbles （Area 5 cm allowed per. sq. meter of module）Gap between cells （Adjusted in Stringing machine）Gap between cells （Gap 1.0 mm）Ribbon misalignment （ 1 mm allowed）Ribbon misalignment （The ribbons on each cell are not allowed to touch each other, and connection should not

28、be closer to the cell edge than the last gridline）Broken cells （Not admitted）11Cracked cells （Not admitted）12Space between cells and frame edge （Cell to frame 8 4 mm / Not accepted if less than 4mm）13Scratches on glass （No serious scratches or damaged glass allowed）14Scratches on glass （Length 60mm,

29、 width 0.1mm, not allowed）15Scratches on glass （Length =60mm, width =0.1mm, only 1 per square meter is allowed）16Ribbons （Broken leads not admitted）17Label （Missing bar code）18Label （front label Covering cell）19Frame scratches （Scratch longer than 30 mm is not allowed）20Frame assembly （Frame corner Gap on front side; Gap 1 mm not allowed.）21Frame dimensions （According to module datasheet）22Frame adhesive tape （Remains after proper cutting with knife allowed.）B