CN208368532U - Crystal silicon photovoltaic solar battery electrical pumping annealing test device - Google Patents
Crystal silicon photovoltaic solar battery electrical pumping annealing test device Download PDFInfo
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- CN208368532U CN208368532U CN201821005659.6U CN201821005659U CN208368532U CN 208368532 U CN208368532 U CN 208368532U CN 201821005659 U CN201821005659 U CN 201821005659U CN 208368532 U CN208368532 U CN 208368532U
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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
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Abstract
The utility model discloses a kind of crystal silicon photovoltaic solar battery electrical pumping annealing test devices, the test device includes camera bellows, sample test platform, temperature control device, power supply device and image collecting device, the sample test platform, temperature control device, power supply device and image collector are setting in camera bellows, the sample test platform is for placing solar battery sheet, the temperature control device is used to control the temperature of solar battery sheet, the power supply device provides electric current to solar battery sheet, described image acquisition device is for acquiring electroluminescent image of the solar battery sheet under different temperatures and current condition.The device is capable of providing stable temperature and electric current, and the electroluminescent image of solar battery sheet is obtained at different temperature and current condition, can conveniently check cell piece excitation defect and be passivated the overall process of defect, structure is simple, convenient test.
Description
Technical field
The utility model relates to solar battery sheet manufacturing field, in particular to a kind of crystal silicon photovoltaic solar battery electricity note
Enter test device of annealing.
Background technique
Solar energy is of interest by people always to its utilization as a kind of cleaning, the reproducible energy.The crystalline silicon sun
Energy battery is the major product on current photovoltaic market, but photo attenuation (light-induced degradation, LID)
Problem strongly limits its scale volume production application.The initial photo attenuation of photovoltaic module on the market is the initial light by battery
Caused by induced attenuation, therefore the processing that anti-light to cell piece need to decline.Be passivated to corresponding defect and impurity is to inhibit photic to decline
The effective means subtracted, dominant mechanism are: illumination or electrical pumping change the formation that carrier concentration induces complex centre, change simultaneously
The quasi-Fermi level of power transformation promotes respective element to be passivated complex centre.To realize the injection mode, existing crystal silicon light
The volt anti-LID technology of solar battery is mainly to pass through photo-thermal furnace and the realization of electrical pumping annealing furnace.
The light implantation annealing equipment used in the prior art is mainly tunnel structure, and light source (halogen is equipped in tunnel
Lamp/LED/ laser), when cell piece process of passing through tunnel, certain temperature is heated to cell piece using the photothermal technique of light source, thus real
Now the anti-LID of cell piece is handled, can effectively inhibit monocrystalline passivation emitter and back local contact battery (Passivated
Emitter Rear Contact, PERC) light decay, transfer efficiency attenuation results are reduced to from 3%~5% before
Within 1.5%.But the output less stable of cell piece after illumination degeneration processing is found in actual test, there is also biggish
Decaying, while power consumption is big, higher cost.Therefore it proposes to carry out the anti-light processing that declines using the method for electrical pumping annealing, it can be fine
Ground reduces cost and guarantees the stability of battery.
Since the defect and impurity of crystal silicon photovoltaic solar battery is complicated, for temperature needed for every kind of complex centre and apply
External voltage is added all to be not quite similar.Once beyond corresponding temperature or applying external voltage, the complex centre of loss of activity will
It is activated, single injection mode is difficult to effectively be passivated all complex centres.For a variety of attenuating mechanisms, polycrystalline processing mode
Multiple sub-stages will be present, need the longer processing time.Therefore, in order to more effectively be passivated defect, it is known that solar battery
The type and its treatment conditions of piece major defect, it is to be understood that the influence of temperature and electric current in defect passivation and activation.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art and deficiencies, provide a kind of crystal silicon photovoltaic solar energy
Battery electrical pumping annealing test device, which is capable of providing stable temperature and electric current, in different temperature and current condition
The lower electroluminescent image for obtaining solar battery sheet can conveniently check the overall process of cell piece excitation defect and passivation defect,
Structure is simple, convenient test.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of crystal silicon photovoltaic solar battery electrical pumping annealing test device, the test device include camera bellows, sample survey
Test stand, temperature control device, power supply device and image collecting device, the sample test platform, temperature control device, power supply device and image are adopted
Acquisition means are located in camera bellows, and the sample test platform is for placing solar battery sheet, and the temperature control device is for controlling the sun
The temperature of energy cell piece, the power supply device give solar battery sheet to provide electric current, and described image acquisition device is for acquiring too
Electroluminescent image of the positive energy cell piece under different temperatures and current condition.
The camera bellows includes nitrogen injection port and exhaust outlet as a preferred technical solution,.It can be injected from nitrogen injection port
Nitrogen, nitrogen avoid solar battery sheet from being oxidized in electrical pumping annealing test process.
The sample test platform includes upper probe fixing frame as a preferred technical solution, upper probe is arranged, lower probe is fixed
Frame and lower probe row, the fixed upper probe row of upper probe fixing frame, the fixed lower probe of lower probe fixing frame
Row.
Temperature control device includes heated at constant temperature platform, temperature sensor, temperature detect switch (TDS) and fan as a preferred technical solution,
The heated at constant temperature platform is placed in the lower section of the sample test platform, and the temperature sensor is connect with solar battery sheet, described
Fan is installed at the exhaust outlet of camera bellows, and temperature detect switch (TDS) is used to control the power on/off of fan.
The power supply device is constant-current source as a preferred technical solution,.Constant-current source can provide surely for solar battery sheet
Fixed electric current.
Described image acquisition device includes camera, camera support, camera fixed block and cunning as a preferred technical solution,
Block, the camera are fixed on camera support by camera fixed block, and the camera is realized sliding on camera support by sliding block
It is dynamic.
The utility model compared with prior art, is had the following advantages and beneficial effects:
1, the test device of the utility model is to be annealed into one in conjunction with solar battery sheet electroluminescent detection and electrical pumping
The test device of body can carry out electroluminescent detection during electrical pumping anneals test, reduce detection time, reduce test
Energy consumption.
2, the temperature control device that the utility model uses can be according to the temperature controlled fan of the solar battery sheet detected
On-off improves cooling rate to adjust the temperature of solar battery sheet, so that test environment is maintained temperature constant state, effectively protects
Card solar battery sheet is decayed under different electrical pumping annealing conditions and regenerated stability.
3, electroluminescent image of the utility model in the case where obtaining different time sections different temperatures and current condition, is changed
It can be more that dynamic analysis, which is learned, to study the influence of temperature, electric current to solar battery sheet decling phase and regeneration stage
Step annealing processing provides foundation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of camera bellows in the utility model embodiment
Fig. 2 is sample test platform, temperature control device, power supply device and the image being placed in camera bellows in the utility model embodiment
The structural schematic diagram of acquisition device
Fig. 3 is crystal silicon photovoltaic solar battery electrical pumping annealing test method flow chart in the utility model embodiment
Detailed description of the invention: 1: computer, 2: lower probe fixing frame, 3: lower probe row, 4: solar battery sheet, 5: carrier frame,
6: sliding block, 7: camera support, 8: camera fixed block, 9: camera, 10: upper probe row, 11: upper probe fixing frame, 12: temperature sensing
Device, 13: temperature detect switch (TDS), 14: heated at constant temperature platform, 15: constant-current source, 16: nitrogen injection port, 17: camera bellows, 18: exhaust outlet, 19: wind
Fan
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
As shown in Figure 1, 2, a kind of crystal silicon photovoltaic solar battery electrical pumping annealing is provided in the utility model embodiment
Test device, the device include camera bellows 17, sample test platform, temperature control device, power supply device and image collecting device.Sample test
Platform, temperature control device, power supply device and image collector are setting in camera bellows 17.Camera bellows 17 is a rectangular parallelepiped structure, in camera bellows
A side offer nitrogen injection port 16, another symmetrical side offers exhaust outlet 18.It can be from nitrogen injection port 16
Nitrogen is injected, solar battery sheet is avoided to be oxidized in electrical pumping annealing test process.Camera bellows 17 be it is lighttight, take
Electroluminescent image definition is more preferable, and accuracy is higher.
Sample test platform includes upper probe fixing frame 11, upper probe row 10, lower probe fixing frame 2 and lower probe row 3.Upper spy
The fixed upper probe row 10 of needle fixed frame 11, the fixed lower probe row 3 of lower probe fixing frame 2.Solar battery sheet 4 is placed on sample survey
In test stand, upper probe row 10, lower probe row 3 every probe all with 4 main grid precise contact of solar battery sheet, it is ensured that it is brilliant too
Positive energy cell piece 4 is powered.
Temperature control device includes heated at constant temperature platform 14, temperature sensor 12, temperature detect switch (TDS) 13 and fan 19.Heated at constant temperature platform 14
It is placed in the lower section of sample test platform, 14 highest of heated at constant temperature platform is controllable to 450 DEG C.Temperature sensor 12 is that electric thermo-couple temperature passes
Sensor is connect with solar battery sheet 4.Fan 19 is installed at the exhaust outlet 18 of camera bellows 17.Temperature detect switch (TDS) 13 is for controlling wind
The power on/off of fan 19.The temperature of solar battery sheet is transmitted to temperature detect switch (TDS) 13 by temperature sensor 12, passes through temperature detect switch (TDS) 13
The power on/off of fan 19 is controlled, to keep solar battery sheet constant temperature.
Power supply device is constant-current source 15, and constant-current source 15 passes through high temperature-resistant cable and upper probe row 10 and 3 connection of lower probe row.
The main grid precise contact of upper probe row 10 and lower probe row 3 and solar battery sheet 4, it is ensured that solar battery can be connected in electric current
Piece 4.
Image collecting device includes camera 9, camera support 7, camera fixed block 8 and sliding block 6.Camera 9 is near infrared camera,
Camera 9 is fixed on camera support 7 by camera fixed block 8, is realized by sliding block 6 and is slided on camera support 7.Camera 9 is used
In obtaining electroluminescent image, electric current and temperature are analyzed to decaying by the changing rule of dark area in electroluminescent image
The influence of rate and regeneration rate.Image collecting device and sample test platform are mounted on carrier frame 5, and carrier frame 5 is for aluminium conjunction
Golden material is made.
A kind of crystal silicon photovoltaic solar battery electrical pumping annealing test method, institute are additionally provided in the utility model embodiment
The method of stating includes the following steps:
Temperature control device is connected, solar battery sheet is made to be maintained at steady temperature T, T is 50 DEG C.
The main grid of solar battery sheet is well contacted with upper probe row 10 and lower probe row 3, circuit is connected, to solar energy
Cell piece Injection Current I, I 10A, and obtain the initial electroluminescent image of solar battery sheet.
Keep temperature T and electric current I constant, the electroluminescent image of acquisition in (5 minutes) at regular intervals, until electroluminescent
The constant just stopping of dark area in luminescent image.
Situation is changed over time by dark area in analysis electroluminescent image to estimate die-away time tdegWhen with regeneration
Between tre, corresponding rate of decay can be obtainedAnd regeneration rateSuch as according to experiment choose 0h, 4h,
Electroluminescent image corresponding to 10h, 27h, 45h, 66h, 90h, 140h moment carries out the situation of change analysis of dark area.
(A) entire electroluminescent image can be contrasted dimmed and relatively uniform by 0h to 10h, there is a few regions dark journey
Degree is more obvious, and decaying is steady, and rate of decay is small；(B) this period from 10h to 27h, dark area becomes more in image
Homogenization, almost without obvious region outstanding, there is not biggish fluctuation in rate of decay；(C) but after having arrived 45h, figure
There is apparent local phaeodium in many places as in, form sharp contrast, and decaying mutates, and rate of decay sharply increases；(D) from
This period of 66h to 90h, phaeodium are disappearing, slowly mobile to central area, in decaying and regenerated dynamic equilibrium,
Decay in general and reducing, regeneration rate is increasing；(E) last 90h to 140h, decaying fade away, based on regeneration,
Regeneration rate is relatively stable, and final image is compared with initial pictures, still remains seldom dark trace, but can ignore.
Change temperature or electric current, repeat the above steps, when obtaining that crystal silicon photovoltaic battery is long under different electrical pumping annealing conditions
Between electroluminescent image, thus analysis obtain the rate of decay R under different electrical pumping annealing conditionsdegWith regeneration rate Rre。
According to the rate of decay R under different electrical pumping annealing conditionsdegWith regeneration rate Rre, analysis temperature, electric current are to decaying
Rate RdegWith regeneration rate RreInfluence.
Solar battery sheet 4 can be the Monocrystalline silicon cell piece or polycrystalline silicon battery plate for mixing B, mixing Ga, mixing Ge, and best
The solar battery sheet for selecting the same specification of same producer guarantees the stability of test result.The range of temperature T is 30-100
DEG C, the range of electric current I is 0.1A-15A, and interval of taking pictures is 1-10 minutes.
By repeatedly testing, temperature is obtained to rate of decay RdegWith regeneration rate RreInfluence can be fitted to lower section
Journey:
With
Wherein T is temperature, EaFor reaction activity, Ea=0.5921, kB=1.38 × 10-23J/K, A are frequency factor, A
=1.42 × 10-8。
By repeatedly testing, electric current is obtained to rate of decay RdegWith regeneration rate RreInfluence can be fitted to lower section
Journey:
WithWherein I is electric current, and a and b are impact factor, a=-3.11, b=67.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
- The test device 1. a kind of crystal silicon photovoltaic solar battery electrical pumping is annealed, which is characterized in that the test device includes dark Case, sample test platform, temperature control device, power supply device and image collecting device, the sample test platform, temperature control device, power supply dress It sets with image collector setting in camera bellows, the sample test platform is used for placing solar battery sheet, the temperature control device In the temperature of control solar battery sheet, the power supply device provides electric current, described image acquisition device to solar battery sheet For acquiring electroluminescent image of the solar battery sheet under different temperatures and current condition.
- The test device 2. a kind of crystal silicon photovoltaic solar battery electrical pumping according to claim 1 is annealed, which is characterized in that The camera bellows includes nitrogen injection port and exhaust outlet.
- The test device 3. a kind of crystal silicon photovoltaic solar battery electrical pumping according to claim 1 is annealed, which is characterized in that The sample test platform includes that upper probe fixing frame, upper probe row, lower probe fixing frame and lower probe row, the upper probe are fixed The fixed upper probe row of frame, the fixed lower probe row of lower probe fixing frame.
- The test device 4. a kind of crystal silicon photovoltaic solar battery electrical pumping according to claim 1 is annealed, which is characterized in that The temperature control device includes heated at constant temperature platform, temperature sensor, temperature detect switch (TDS) and fan, and the heated at constant temperature platform is placed in the sample The lower section of product testboard, the temperature sensor are connect with solar battery sheet, and the fan is installed at the exhaust outlet of camera bellows, Temperature detect switch (TDS) is used to control the power on/off of fan.
- The test device 5. a kind of crystal silicon photovoltaic solar battery electrical pumping according to claim 1 is annealed, which is characterized in that The power supply device is constant-current source.
- The test device 6. a kind of crystal silicon photovoltaic solar battery electrical pumping according to claim 1 is annealed, which is characterized in that Described image acquisition device includes camera, camera support, camera fixed block and sliding block, and the camera is fixed by camera fixed block In on camera support, the camera is realized by sliding block and is slided on camera support.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000793A1 (en) * | 2018-06-28 | 2020-01-02 | 华南理工大学 | Crystalline silicon photovoltaic solar cell electric injection annealing test device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000793A1 (en) * | 2018-06-28 | 2020-01-02 | 华南理工大学 | Crystalline silicon photovoltaic solar cell electric injection annealing test device and method |
| US11929448B2 (en) | 2018-06-28 | 2024-03-12 | South China University Of Technology | Electric injection annealing test device and a method thereof for crystalline silicon photovoltaic solar cells |
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