CN105406817A - Method for detecting and determining hot spots of solar cell - Google Patents
Method for detecting and determining hot spots of solar cell Download PDFInfo
- Publication number
- CN105406817A CN105406817A CN201510880985.6A CN201510880985A CN105406817A CN 105406817 A CN105406817 A CN 105406817A CN 201510880985 A CN201510880985 A CN 201510880985A CN 105406817 A CN105406817 A CN 105406817A
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- hot spot
- solar cell
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- hot spots
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a method for detecting and determining hot spots of a solar cell. The method comprises the following steps: testing hot spots of the solar cell; classifying the hot spots of the solar cell; determining the hot spots of the solar cell; and the like. According to the method disclosed by the invention, whether the solar cell has a risk of hot spots or not can be quickly and reliably detected and determined; and the determination is accurate.
Description
Technical field
The present invention relates to a kind of detection and decision method of solar cell hot spot.
Background technology
Along with the extensive use of solar cell, some unfavorable factors affecting photovoltaic module power generation performance and life-span thereof also occur thereupon, and hot spot effect is exactly one of them.So-called hot spot effect, refers to when the battery of in assembly or a Battery pack are blocked or damage, and operating current has exceeded the short circuit current that this battery or battery pack reduce, and hot spot heating can occur in assembly.Now affected battery or battery pack are placed in reverse-bias state, consumed power, thus cause overheated.Temperature is too high assembly regional area may be caused to burn or form blackening, the permanent damage such as solder joint melts, encapsulating material is aging, glass rupture, welding corrosion, cause great hidden danger to the safety and reliability of assembly.
Cause a lot of because have of assembly hot spot, one of them key factor is solar cell hot spot.Solar cell hot spot refers under certain condition, in battery somewhere owing to hiddenly to split, the local temperature that causes of edge current leakage, burning etc. is too high.If this cell piece is used for photovoltaic module, under given conditions, probably can causes assembly hot spot, cause assembly to damage.
At present, most photovoltaic module manufacturer is for the management and control of hot spot, and the method for employing extracts assembly in proportion to do hot spot test, and solar cell does not do hot spot and detects.There is two problems in this kind of way, one is very limited by the component count inspected by random samples, and most assembly does not detect through any hot spot, considerably increases the risk that hot spot effect in use occurs assembly.Two is that hot spot test period of assembly is longer, cannot realize the timely feedback to the solar cell quality of production.
Summary of the invention
The object of the present invention is to provide a kind of easy and simple to handle, fast and reliable, the detection of economical and practical solar cell hot spot and decision method.
Technical solution of the present invention is:
The detection of solar cell hot spot and a decision method, is characterized in that: comprise the following steps:
(1) solar cell hot spot test
Certain reverse biased is added to solar cell, maintains the regular hour, record hot spot position and the shape of this solar cell;
(2) solar cell hot spot classification
Hot spot is divided into following three types by the position occurred according to solar cell hot spot and shape:
If hot spot appears at four corners of solar cell, long for L1, wide be the rectangular region of W1, this hot spot type definition is Corner;
If hot spot appears at four limits of solar cell, long for L1, wide be W2 or long for L2, wide be the rectangular region of W1, this hot spot type definition is MiddleEdge;
If hot spot appears at the centre of solar cell, long for L2, wide be the rectangular region of W2, shape is circle, and this hot spot type definition is SiNxArea;
(3) solar cell hot spot judges
For the solar cell hot spot of Corner and MiddleEdge two type, can directly be judged to be excessive risk hot spot, this type of battery is not useable for assembly; For SiNxArea type, need judge in conjunction with electric leakage, electric leakage > 0.3A's, be judged to be hot spot excessive risk, be not useable for assembly, electric leakage < 0.3A's, be judged to be hot spot low-risk, can be used for assembly.
Step adds certain reverse biased to solar cell described in (1), maintains the regular hour, refers to reverse biased >=20V, maintain at least 200ms.
The present invention can detect fast, reliably and judge whether solar cell has hot spot risk, differentiates accurately.
The present invention only need carry out hot spot detection and judgement to solar cell, just substantially can realize the control to photovoltaic module hot spot, greatly reduce the hot spot risk caused by solar cell.Further, adopt in this way, to the detection of monolithic battery and judge can complete in very short time, convenient and swift, accurately and reliably.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is solar cell hot spot position and schematic shapes
Fig. 2 is the infrared figure of Corner hot spot
Fig. 3 is the infrared figure of MiddleEdge hot spot
Fig. 4 is the infrared figure of SiNXArea hot spot.
Embodiment
Embodiment 1:
The detection of novel solar battery hot spot and a decision method, wherein: to the reverse voltage of tested solar cell applying >=20V, maintain at least 200ms, use IR-Camera to gather the hot spot picture of tested battery.As shown in Figure 2, hot spot appears at a corner of cell piece, and maximum temperature point is certain point near cell piece summit, and heat is along this point to cell piece internal radiation, and shape is roughly fan-shaped, and according to our definition, this kind of hot spot type is Corner.Therefore we judge that this cell piece has high hot spot risk, are not useable for making assembly.
Embodiment 2:
The detection of novel solar battery hot spot and a decision method, wherein: the reverse voltage of applying >=20V, maintain at least 200ms, uses IR-Camera to gather the hot spot picture of tested battery.As shown in Figure 3, hot spot appears at an edge of cell piece, and maximum temperature point is certain point near cell piece edge, heat is along this point to cell piece internal radiation, shape is roughly semicircle, and according to our definition, this kind of hot spot type is MiddleEdge.Therefore we judge that this cell piece has high hot spot risk, are not useable for making assembly.
Embodiment 3:
The detection of novel solar battery hot spot and a decision method, wherein: to the reverse voltage of tested solar cell applying >=20V, maintain at least 200ms, use IR-Camera to gather the hot spot picture of tested battery.As shown in Figure 4, hot spot appears at the inside of cell piece, and maximum temperature point is certain point of cell piece inside, and heat is along this point to surrounding radiation, and shape is roughly circle, and according to our definition, this kind of hot spot type is SiNxArea.And recording this cell piece reverse current corresponding under particular inverse voltage is >=1.0A, and therefore we judge that this cell piece has high hot spot risk, are not useable for making assembly.
Claims (2)
1. the detection of solar cell hot spot and a decision method, is characterized in that: comprise the following steps:
(1) solar cell hot spot test
Certain reverse biased is added to solar cell, maintains the regular hour, record hot spot position and the shape of this solar cell;
(2) solar cell hot spot classification
Hot spot is divided into following three types by the position occurred according to solar cell hot spot and shape:
If hot spot appears at four corners of solar cell, this hot spot type definition is Corner;
If hot spot appears at four limits of solar cell, this hot spot type definition is MiddleEdge;
If hot spot appears at the centre of solar cell, shape is circular, and this hot spot type definition is SiNxArea;
(3) solar cell hot spot judges
For the solar cell hot spot of Corner and MiddleEdge two type, can directly be judged to be excessive risk hot spot, this type of battery is not useable for assembly; For SiNxArea type, need judge in conjunction with electric leakage, electric leakage > 0.3A's, be judged to be hot spot excessive risk, be not useable for assembly, electric leakage < 0.3A's, be judged to be hot spot low-risk, can be used for assembly.
2. the detection of solar cell hot spot according to claim 1 and decision method, is characterized in that: step adds certain reverse biased to solar cell described in (1), maintains the regular hour, refer to reverse biased >=20V, maintain at least 200ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510880985.6A CN105406817A (en) | 2015-12-04 | 2015-12-04 | Method for detecting and determining hot spots of solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510880985.6A CN105406817A (en) | 2015-12-04 | 2015-12-04 | Method for detecting and determining hot spots of solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105406817A true CN105406817A (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510880985.6A Pending CN105406817A (en) | 2015-12-04 | 2015-12-04 | Method for detecting and determining hot spots of solar cell |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057702A (en) * | 2016-08-16 | 2016-10-26 | 苏州阿特斯阳光电力科技有限公司 | Detection method for solar battery piece with qualified hot spot temperature range |
| CN107681978A (en) * | 2017-09-15 | 2018-02-09 | 韩华新能源（启东）有限公司 | A kind of detection method of solar cell hot spot |
| CN112701186A (en) * | 2020-12-25 | 2021-04-23 | 韩华新能源（启东）有限公司 | Label manufacturing method for thermosensitive camera position detection, label and detection method |
| CN113466253A (en) * | 2020-03-31 | 2021-10-01 | 苏州阿特斯阳光电力科技有限公司 | Method and equipment for detecting hot spot defect of solar cell |
| CN113731865A (en) * | 2021-09-03 | 2021-12-03 | 晶澳（扬州）太阳能科技有限公司 | Solar cell sorting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100010983A (en) * | 2008-07-24 | 2010-02-03 | 세크론 주식회사 | Testing apparatus for solar cell and testing method for solar cell using the same |
| JP5173020B2 (en) * | 2009-04-15 | 2013-03-27 | シャープ株式会社 | Solar cell panel inspection apparatus, solar cell panel inspection method, and solar cell panel manufacturing method |
| CN103825550A (en) * | 2012-11-19 | 2014-05-28 | 天津永明新能源科技有限公司 | Methods for testing reverse-bias-voltage characteristics of solar-energy cell assembly |
| CN104467663A (en) * | 2014-11-21 | 2015-03-25 | 河海大学常州校区 | System and method for detecting photovoltaic hot spot damage solar cell leak currents |
| US9217767B2 (en) * | 2013-05-27 | 2015-12-22 | Sae Magnetics (H.K.) Ltd. | Testing method of a solar cell panel, and testing apparatus thereof |
-
2015
- 2015-12-04 CN CN201510880985.6A patent/CN105406817A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100010983A (en) * | 2008-07-24 | 2010-02-03 | 세크론 주식회사 | Testing apparatus for solar cell and testing method for solar cell using the same |
| JP5173020B2 (en) * | 2009-04-15 | 2013-03-27 | シャープ株式会社 | Solar cell panel inspection apparatus, solar cell panel inspection method, and solar cell panel manufacturing method |
| CN103825550A (en) * | 2012-11-19 | 2014-05-28 | 天津永明新能源科技有限公司 | Methods for testing reverse-bias-voltage characteristics of solar-energy cell assembly |
| US9217767B2 (en) * | 2013-05-27 | 2015-12-22 | Sae Magnetics (H.K.) Ltd. | Testing method of a solar cell panel, and testing apparatus thereof |
| CN104467663A (en) * | 2014-11-21 | 2015-03-25 | 河海大学常州校区 | System and method for detecting photovoltaic hot spot damage solar cell leak currents |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057702A (en) * | 2016-08-16 | 2016-10-26 | 苏州阿特斯阳光电力科技有限公司 | Detection method for solar battery piece with qualified hot spot temperature range |
| CN106057702B (en) * | 2016-08-16 | 2018-11-27 | 苏州阿特斯阳光电力科技有限公司 | A kind of detection method of the solar battery sheet with qualified hot spot temperature range |
| CN107681978A (en) * | 2017-09-15 | 2018-02-09 | 韩华新能源（启东）有限公司 | A kind of detection method of solar cell hot spot |
| CN113466253A (en) * | 2020-03-31 | 2021-10-01 | 苏州阿特斯阳光电力科技有限公司 | Method and equipment for detecting hot spot defect of solar cell |
| CN112701186A (en) * | 2020-12-25 | 2021-04-23 | 韩华新能源（启东）有限公司 | Label manufacturing method for thermosensitive camera position detection, label and detection method |
| CN113731865A (en) * | 2021-09-03 | 2021-12-03 | 晶澳（扬州）太阳能科技有限公司 | Solar cell sorting method |
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Application publication date: 20160316 |