CN102565187A - Method for detecting reverse bias noise in solar cell detection system - Google Patents
Method for detecting reverse bias noise in solar cell detection system Download PDFInfo
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- CN102565187A CN102565187A CN2011104404763A CN201110440476A CN102565187A CN 102565187 A CN102565187 A CN 102565187A CN 2011104404763 A CN2011104404763 A CN 2011104404763A CN 201110440476 A CN201110440476 A CN 201110440476A CN 102565187 A CN102565187 A CN 102565187A
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Abstract
The invention provides a method for detecting reverse bias noise in a solar cell detection system. The method comprises the following steps: A, enabling a solar cell to be positioned in a reverse bias condition state; B, acquiring an I-V characteristic curve of the solar cell under the condition that light does not exist by using a shielding box; C, determining voltage corresponding to a starting point where current is increased sharply according to the I-V characteristic curve; and E, starting to adjust the bias voltage of the solar cell from 0V at a first voltage step length to detect a noise signal of the solar cell, and after the bias voltage is adjusted to the voltage corresponding to the starting point where the current is increased sharply, continuously adjusting the bias voltage of the solar cell at a second voltage step length to detect the noise signal of the solar cell. According to the method disclosed by the invention, the breakdown position of the solar cell and reliable parameters can be detected by analyzing the reverse bias noise of the solar cell and the detection precision of the method is higher than that of an image detection method.
Description
Technical field
The present invention relates to the solar cell detection system, particularly, relate to the anti-noise detecting method partially in the solar cell detection system.
Background technology
There is abundant solar energy resources in China, and solar energy power generating has obtained widespread use in a lot of fields such as communication, traffic, oil, the electrification of the countryside, the product for civilian use.The quality of assurance solar photovoltaic generation system not only depends on the design of system, also depends on the quality of each parts product of construction system.Photovoltaic module is as the critical piece of solar photovoltaic generation system, and the quality of its product is very important.For guaranteeing the quality of this product, country has formulated relevant examination criteria, and in the production run of enterprise, the accuracy of its parameter detecting is directly to embody the key factor of assembly quality, so the detection link when component package is dispatched from the factory is particularly important.Mostly checkout equipment of the prior art is to detect through the IMAQ identification mode, and its accuracy of detection is not high.
Summary of the invention
To defective of the prior art, the purpose of this invention is to provide the anti-noise detecting method partially in a kind of solar cell detection system.
According to an aspect of the present invention, the anti-noise detecting method partially in a kind of solar cell detection system is provided, comprises the steps:
Steps A: place anti-testing circuit partially to make solar cell be in the reverse bias condition state in solar cell;
Step B: utilize shading box to obtain the I-V family curve of solar cell under no optical condition;
Step C: according to the definite corresponding voltage in starting point place that increases sharply with electric current of said I-V family curve;
Step D: first voltage step size and second voltage step size are set, and wherein, said first voltage step size is greater than said second voltage step size;
Step e: the bias voltage that begins to adjust solar cell from OV with said first voltage step size detects the noise signal of solar cell; After said bias voltage is adjusted to the said voltage corresponding with the starting point place of electric current surge, continue the noise signal of the bias voltage detection solar cell of adjustment solar cell with said second voltage step size;
Step F: confirm that according to said noise signal the position that punctures takes place solar cell;
Step G: obtain the dependability parameter of solar cell according to said noise signal,
Wherein, said step e does not have really and to carry out under the optical condition.
Preferably, in said step e, said bias voltage is adjusted to-35V from OV.
Preferably, said second voltage step size is 0.01V.
Preferably, said first voltage step size is 0.2V.
The present invention can detect the puncture place and the dependability parameter of solar battery sheet through the anti-noise partially of analyzing solar cell, and accuracy of detection is higher than image detecting method.
Description of drawings
Through reading the detailed description of non-limiting example being done with reference to following accompanying drawing, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 illustrates according to the positively biased testing circuit principle schematic among the embodiment of the anti-noise detecting method partially in the solar cell detection system of the present invention.
Embodiment
Anti-noise detecting method partially according in the solar cell detection system provided by the invention comprises the steps: steps A: place anti-testing circuit partially to make solar cell be in the reverse bias condition state in solar cell; Step B: utilize shading box to obtain the I-V family curve of solar cell under no optical condition; Step C: according to the definite corresponding voltage in starting point place that increases sharply with electric current of said I-V family curve; Step D: first voltage step size and second voltage step size are set, and wherein, said first voltage step size is greater than said second voltage step size; Step e: the bias voltage that begins to adjust solar cell from OV with said first voltage step size detects the noise signal of solar cell; After said bias voltage is adjusted to the said voltage corresponding with the starting point place of electric current surge, continue the noise signal of the bias voltage detection solar cell of adjustment solar cell with said second voltage step size; Step F: confirm that according to said noise signal the position that punctures takes place solar cell; Step G: the dependability parameter that obtains solar cell according to said noise signal.Wherein, said step e does not have really and to carry out under the optical condition.
Preferably, in said step e, said bias voltage is adjusted to-35V from 0V.Preferably, said second voltage step size is 0.01V.Preferably, said first voltage step size is 0.2V.When said second voltage step size is 0.01V, can obviously reflect the three phases that solar cell punctures, make that test is more accurate.When said first voltage step size is 0.2V, can accelerate detection speed, and can not influence the obvious characteristic of the three phases of solar cell puncture, guaranteed the accuracy of test.Wherein, said anti-inclined to one side testing circuit is preferably as shown in Figure 1, and said solar cell 1 and pull-up resistor 2 are connected in the said anti-testing circuit partially.
More than specific embodiment of the present invention is described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the claims, and this does not influence flesh and blood of the present invention.
Claims (4)
1. the anti-noise detecting method partially in the solar cell detection system is characterized in that, comprises the steps:
Steps A: place anti-testing circuit partially to make solar cell be in the reverse bias condition state in solar cell;
Step B: utilize shading box to obtain the I-V family curve of solar cell under no optical condition;
Step C: according to the definite corresponding voltage in starting point place that increases sharply with electric current of said I-V family curve;
Step D: first voltage step size and second voltage step size are set, and wherein, said first voltage step size is greater than said second voltage step size;
Step e: the bias voltage that begins to adjust solar cell from 0V with said first voltage step size detects the noise signal of solar cell; After said bias voltage is adjusted to the said voltage corresponding with the starting point place of electric current surge, continue the noise signal of the bias voltage detection solar cell of adjustment solar cell with said second voltage step size;
Step F: confirm that according to said noise signal the position that punctures takes place solar cell;
Step G: obtain the dependability parameter of solar cell according to said noise signal,
Wherein, said step e does not have really and to carry out under the optical condition.
2. the anti-noise detecting method partially in the solar cell detection system according to claim 1 is characterized in that in said step e, said bias voltage is adjusted to-35V from 0V.
3. the anti-noise detecting method partially in the solar cell detection system according to claim 1 and 2 is characterized in that said second voltage step size is 0.01V.
4. according to the anti-noise detecting method partially in each described solar cell detection system in the claim 1 to 3, it is characterized in that said first voltage step size is 0.2V.
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| CN2011104404763A CN102565187A (en) | 2011-12-26 | 2011-12-26 | Method for detecting reverse bias noise in solar cell detection system |
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| CN2011104404763A CN102565187A (en) | 2011-12-26 | 2011-12-26 | Method for detecting reverse bias noise in solar cell detection system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406819A (en) * | 2015-12-24 | 2016-03-16 | 常州天合光能有限公司 | Reverse breakdown performance testing method for solar cell |
| CN107846193A (en) * | 2017-12-14 | 2018-03-27 | 西安电子科技大学 | A kind of performance test methods of solar cell reverse breakdown three phases |
| TWI662785B (en) * | 2018-01-05 | 2019-06-11 | 財團法人工業技術研究院 | Defect inspection method and system for solar cell |
| US10461690B2 (en) | 2017-12-04 | 2019-10-29 | Industrial Technology Research Institute | Defect inspection method and system for solar cell |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406819A (en) * | 2015-12-24 | 2016-03-16 | 常州天合光能有限公司 | Reverse breakdown performance testing method for solar cell |
| CN105406819B (en) * | 2015-12-24 | 2018-03-20 | 天合光能股份有限公司 | The performance test methods of solar cell reverse breakdown |
| US10461690B2 (en) | 2017-12-04 | 2019-10-29 | Industrial Technology Research Institute | Defect inspection method and system for solar cell |
| CN107846193A (en) * | 2017-12-14 | 2018-03-27 | 西安电子科技大学 | A kind of performance test methods of solar cell reverse breakdown three phases |
| CN107846193B (en) * | 2017-12-14 | 2019-09-03 | 西安电子科技大学 | A kind of performance test methods of solar battery reverse breakdown three phases |
| TWI662785B (en) * | 2018-01-05 | 2019-06-11 | 財團法人工業技術研究院 | Defect inspection method and system for solar cell |
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Application publication date: 20120711 |