CN210092114U - Solar cell electrode preparation or poor contact repair equipment - Google Patents
Solar cell electrode preparation or poor contact repair equipment Download PDFInfo
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- CN210092114U CN210092114U CN201920973967.6U CN201920973967U CN210092114U CN 210092114 U CN210092114 U CN 210092114U CN 201920973967 U CN201920973967 U CN 201920973967U CN 210092114 U CN210092114 U CN 210092114U
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Abstract
The utility model provides a solar cell electrode preparation or poor contact repair device, which comprises a laser processing module, a processing platform module and a temperature control module; the solar cell is arranged on the processing platform module; laser output by the laser processing module is irradiated on a surface to be prepared or repaired of a solar cell piece on the processing platform module; the temperature control module is used for controlling the temperature of the solar cell on the processing platform module. The utility model discloses a laser beam machining's mode only carries out heat treatment to solar wafer's front region, can obviously improve the contact behavior on positive metal thick liquids of solar cell and silicon surface, improves contact resistance, reduces crystalline silicon solar cell's series resistance, improves the FF, improves conversion efficiency, guarantees the form and the performance of back aluminium thick liquid simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the photovoltaic, concretely relates to solar cell electrode preparation or bad contact's repair equipment.
Background
With the gradual flourishing market demand of clean energy, the photovoltaic industry is greatly developed. The technical development of the crystalline silicon solar cell as a vitality force of the photovoltaic industry is rapidly advanced in recent years.
The metal conductive electrode of the crystalline silicon solar cell generally adopts metal slurry, ohmic contact is formed by chain type rapid sintering, the peak temperature of front silver slurry sintering is generally controlled between 750 and 820 ℃, and the sintering time is very short and is generally 5-10 s. The pressure of cost is compelled, the productivity requirement of the solar cell production line is continuously improved, and the sintering time is further reduced. With the further improvement of the conversion efficiency, the diffusion square resistance is gradually improved, the surface diffusion concentration of the silicon wafer is gradually improved, and the contact performance with the metal slurry needs to be well matched with the sintering condition. Particularly, the back surface of the passivated emitter cell adopts aluminum oxide and silicon nitride as the passivation layer, so that the recombination rate of the back surface of the cell is reduced, and the passivation effect is improved. In order to reduce the damage of high-temperature sintering to the passivation effect, the sintering temperature is low, the time is short, and the contradiction is formed between the high-temperature long-time sintering of the front surface of the crystalline silicon solar cell.
Therefore, in actual production, poor sintering of the electrode of the solar cell is often caused. When the secondary heat treatment method in the prior art is adopted for improvement, due to the fact that double surfaces are heated, when the temperature exceeds the aluminum-silicon alloy temperature of 577 ℃, the shape of the aluminum paste on the back surface is changed again, the phenomena of aluminum beads and aluminum bracts are prone to occurring, the compactness is poor, and the reliability requirement of the solar cell cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the equipment for preparing the solar cell electrode or repairing the poor contact is provided, and the shape and the performance of the back aluminum paste can be ensured.
The utility model discloses a solve the technical scheme who above-mentioned technical problem took and be: a solar cell electrode preparation or bad contact repair equipment is characterized in that: the device comprises a laser processing module, a processing platform module and a temperature control module; the solar cell is arranged on the processing platform module; laser output by the laser processing module is irradiated on a surface to be prepared or repaired of a solar cell piece on the processing platform module; the temperature control module is used for controlling the temperature of the solar cell on the processing platform module.
According to the above scheme, the laser processing module comprises a laser, a laser shaping device and a focusing device which are sequentially arranged according to the emitting sequence of laser, and further comprises a cooling module for cooling the laser shaping device and the focusing device.
According to the scheme, the temperature control module comprises a heating module and a cooling module; wherein, the heating module is arranged below the processing platform module, and the cooling module is arranged above the processing platform module.
According to the scheme, the equipment is further provided with a mobile module, and the mobile module is connected with at least 1 of the laser processing module and the processing platform module so as to scan the surface to be prepared or repaired of the solar cell piece by laser.
According to the scheme, the laser platform module comprises a preheating station, a processing station and a cooling station, and the battery pieces are driven to pass through the stations in sequence by a driving device; wherein the heating module is arranged below the preheating station, the laser processing module is arranged above the processing station, and the cooling module is arranged above the cooling station.
According to the scheme, the processing platform module further comprises a feeding station and a discharging station, and the feeding station and the discharging station correspond to the feeding mechanism and the discharging mechanism respectively.
According to the scheme, the processing platform module and the temperature control module are composed of suckers with the functions of negative pressure adsorption, preheating and cooling.
According to the scheme, the processing platform module is a belt type conveying module, and the belt type conveying module comprises a conveying belt and a driving mechanism; the temperature control module comprises a heating module and a cooling module; the heating module, the laser processing module and the cooling module are sequentially arranged along the conveying direction, wherein the heating module is arranged above and/or below the conveying belt, the laser processing module is arranged above the conveying belt, and the cooling module is arranged above the conveying belt or below the conveying belt.
According to the scheme, the heating module is a heating plate or an infrared lamp tube.
According to the scheme, the cooling module is an air knife or a cooling plate.
According to the scheme, the laser processing module further comprises a scanning device arranged behind the focusing device, and the scanning device comprises a galvanometer and a field lens.
The utility model has the advantages that: the utility model discloses a solar cell electrode preparation or bad contact's repair equipment, equipment structure is simple, convenient operation. By adopting a laser processing mode, only the front area of the solar cell is subjected to heat treatment, so that the contact performance of the metal slurry on the front surface of the solar cell and the silicon surface can be obviously improved, the contact resistance is improved, the series resistance of the crystalline silicon solar cell is reduced, the FF (field-effect transistor) is improved, the conversion efficiency is improved, and the form and the performance of the aluminum slurry on the back surface are ensured.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural view of a processing platform module according to a third embodiment of the present invention.
Fig. 3 is a schematic structural view of a laser processing module according to a fourth embodiment of the present invention.
In the figure: 100-laser processing module, 110-laser, 120-first laser shaping device, 130-focusing device, 140-cooling module, 150-optical shutter, 1110-reflector, 160-beam expanding device, 170-second laser shaping device, 180-vibrating mirror, 190-field lens, 200-processing platform module, 210-conveyor belt, 220-driving motor, 230-driving shaft, 240-driven shaft, 300-temperature control module, 310-heating module, 320-cooling module and 4-battery piece.
Detailed Description
The invention is further illustrated by the following specific examples and figures.
In order to ensure the shape and performance of the aluminum paste on the back surface of the solar cell piece, the utility model provides a solar cell electrode preparation or poor contact repair device, which comprises a laser processing module, a processing platform module and a temperature control module; the solar cell is arranged on the processing platform module; laser output by the laser processing module is irradiated on a surface to be sintered or repaired of a solar cell piece on the processing platform module, and an electrode printed on the surface is irradiated and sintered or a poorly contacted electrode is repaired; the temperature control module is used for controlling the temperature of the solar cell on the processing platform module.
Example one
As shown in fig. 1, the present embodiment includes a laser processing module 100, a processing platform module 200, and a temperature control module 300. The battery piece 4 (or the battery piece with poor electrode contact, which is called battery piece for short, the same below) which is coated with the electrode slurry and to be sintered is placed on the processing platform module 200, and the laser processing module 100 is arranged above the processing platform module 200 and irradiates the battery piece 4 placed thereon to complete the sintering or repairing of the electrode. The temperature control module 300 includes a heating module 310 and a cooling module 320, which are disposed near the processing platform module 200, and are used for preheating the battery plate 4 before laser processing and cooling after laser processing.
Further, the laser processing module 100 includes a laser 110, a first laser shaping device 120, and a focusing device 130, which are arranged in a laser irradiation order, and further includes a cooling module 140 for cooling the first laser shaping device 120 and the focusing device 130. In particular, laser 110 may be selected to be a continuous or pulsed laser, preferably an infrared fiber laser, with long pulse times. The first laser shaping device 120 is used to shape the laser beam into a desired shape, and a shaping lens of the prior art is used, and as an implementable solution, the shaping lens is one or more fly's eye lenses. The focusing device 130 is used to focus the light beam, and is implemented by using a focusing lens. The cooling module 140 may use an air-cooled or water-cooled module. Specifically, the light beam of the laser 110 is collimated and then enters a shaping lens to shape the light beam, and then is focused by a focusing lens to obtain a desired spot shape and size on the cell 4. The size of the light spot in at least one direction is slightly larger than the size of the battery piece 4.
The processing platform module is preferred to be negative pressure adsorption processing platform, adsorbs battery piece 4 on it, realizes the good fixed of battery piece 4, and negative pressure adsorption processing platform is prior art, and here is no longer repeated.
The heating module 310 may be a heating plate disposed below the laser processing module 100, and the cooling module 320 may be an air cooling module, which may be an air knife disposed above the laser processing module 100, and the air outlet direction of the air knife faces the battery piece 4.
Preferably, the equipment is further provided with a moving module, and the moving module is connected with at least 1 of the laser processing module 100 and the processing platform module 200 to scan the surface to be repaired of the battery piece 4 by laser. In this embodiment, the laser processing module 100 is fixed on the linear moving mechanism, and is driven by the linear moving mechanism to scan along the scanning direction shown in the figure. The linear moving mechanism can be a linear module and the like. In addition, the processing platform module 200 can be set as an electric platform, and moves relative to the laser processing module 100 to scan the battery piece 4.
In this embodiment, the light spot irradiated by the laser onto the battery piece 4 is slightly larger than the width of the battery piece 4 in the direction perpendicular to the scanning direction, so that the whole battery piece 4 can be conveniently scanned.
The laser processing process is as follows: 1. placing the battery plate 4 with the light receiving surface facing upwards on the processing platform module 200, and starting the heating module 310 for preheating; 2. the light spot of the laser processing module 100 moves to scan the whole cell 4. 3. The cooling module 320 is turned on to cool the battery plate 4.
In order to improve the processing efficiency, a feeding mechanism and a discharging mechanism may be further included to convey and transfer the battery piece 4 to be processed to the processing platform module 200, and to convey and transfer the processed battery piece 4. Feeding mechanism and unloading mechanism can be the negative pressure sucking disc manipulator that the adsorption plane faces down, for prior art, and this place is no longer repeated.
Still further, in order to improve the processing efficiency, the processing platform is a multi-surface processing turntable, 2 or more processing platforms are respectively connected to the DD motor through a support, the DD motor rotates in a stepping manner and respectively passes through a feeding station, a preheating station, a processing station, a cooling station and a discharging station, the heating module 310 is arranged below the preheating station, the laser processing module 100 is arranged above the processing station, the laser processing module 100 is fixed on the linear moving mechanism and scans the battery piece 4, the cooling module 320 is arranged obliquely above the cooling station and respectively completes feeding, preheating, processing, cooling, discharging and the like, and the feeding station and the discharging station respectively correspond to the feeding mechanism and the discharging mechanism. Of course, the feeding and discharging stations can be combined, the processing of a plurality of battery pieces 4 can be completed in a production line, meanwhile, the preheating and cooling are realized when the battery pieces rotate to the corresponding stations, the waiting time of the preheating and cooling is avoided, and the processing efficiency is further improved.
Example two
As an improvement to the first embodiment, the processing platform module 200 and the temperature control module 300 are integrated to form a suction cup with functions of negative pressure absorption, preheating and cooling as a processing platform. The negative pressure adsorption preheating and cooling integrated suction cup is referred to as application number: 201621062533.3 entitled vacuum chuck for preheating and cooling battery piece.
EXAMPLE III
As an improved scheme, in the present embodiment, the processing platform module 200 is directly configured as a belt conveyor module, the belt conveyor module includes a conveyor belt 210 and a driving mechanism, in the present embodiment, the driving mechanism is a driving motor 220 and a driving shaft 230, the driving motor 220 drives the driving shaft 230 to roll, so that the conveyor belt 210 wound around the driving shaft 230 and the driven shaft 240 rotates, and the function of conveying the battery pieces 4 is realized. The temperature control module 300 comprises a heating module 310 and a cooling module 320; the heating module 310, the laser processing module 100 and the cooling module 320 are sequentially arranged along the conveying direction, wherein the heating module 310 is arranged above and/or below the conveying belt 210, the laser processing module 100 is arranged above the conveying belt, and the cooling module 320 is arranged obliquely above, above or below the conveying belt.
The conveyor belt 210 is made of a metal band or a metal chain belt, and can bear high temperature and laser irradiation, so that the material of the conveyor belt 210 is prevented from polluting the battery piece 4 during high temperature and laser irradiation.
In this embodiment, the heating module 310 is a heating plate or an infrared lamp tube, and is disposed above or below the conveyor belt 210, and as an optimal scheme, the heating plate is disposed above and below the conveyor belt 210 at the same time to heat the battery pieces 4 up and down, so as to achieve a better heating effect. At this point, the conveyor belt 210 is preferably two spaced metal belts to avoid thermal blockage.
The laser processing is performed while the battery plate 4 is transferred to the middle of the transfer module.
The cooling module 320 may be an air knife disposed diagonally above the conveyor belt 210 or a cooling plate disposed above or below the conveyor belt 210. As a preferable scheme, cooling plates are arranged above and below the conveyor belt 210 at the same time to cool the battery pieces 4 up and down, so as to achieve a better cooling effect. At this point, the conveyor belt 210 is preferably two spaced metal belts to avoid thermal blockage.
The cooling plate comprises a perforated plate, the perforated plate is a plate body, one or more air cavities are formed in the middle of the perforated plate, air inlets communicated with the air cavities are formed in the side wall of the plate body, a plurality of air outlets communicated with the air cavities are formed in the top of the plate body, cooling air enters the air cavities from the air inlets, is discharged from the air outlets, and is conveyed to the battery piece 4 to complete cooling of the battery piece 4. The cooling module 320 further includes a gas source for providing cooling gas to the porous plate.
The laser processing process is as follows: on placing conveyer belt 210 with cell 4 photic side up, in the transfer process, accomplish preheating to cell 4 when heating module 310, again through the processing station, laser beam keeps motionless, and cell 4 passes through conveyer belt 210 uniform velocity and moves to make whole cell 4 of laser scanning, accomplish processing, then through the cooling station, the cooling module 320 accomplishes the cooling.
In this embodiment, the light spot of the laser light irradiated on the cell 4 is slightly larger than the width of the cell 4 in the direction perpendicular to the conveying direction, so that the cell 4 can scan the entire cell 4 while moving by the conveyor belt 210.
Example four
As an improvement to the first, second, or third embodiment, the laser processing module employs a galvanometer and a field lens for scanning. The laser beam directly acts on the front metal electrode area, and the galvanometer scans according to the pattern of the front electrode. At this time, the laser processing module and the processing platform module do not need to move relatively during processing.
As shown in fig. 3, the laser processing module of this embodiment includes a laser 110, a beam expander 160, a second laser shaping device 170, a galvanometer 180, and a field lens 190, which are sequentially arranged along a laser emitting direction.
Laser 110 may be selected as a continuous or pulsed laser, preferably an infrared fiber laser, with long pulse times. The beam expander 160 is a prior art beam expander, the second laser shaper 170 is a prior art spot shaper for obtaining a desired spot shape, the galvanometer 180 is configured to scan the beam according to a predetermined scan path, in this embodiment, the beam is directed to scan according to the pattern of the electrodes, and the field lens 190 is configured to form the laser beam into a focused spot of uniform size in the processing plane.
Further, a shutter 150 may be disposed behind the laser 100 to control the light emission, and a mirror 1110 may be included in the light path to change the direction of the laser.
In order to enable the laser to scan according to a predetermined path, the laser processing device further comprises a photographing positioning module which is arranged above the processing platform module and used for positioning the battery piece 4. The photographing positioning module comprises one or more CCD cameras and a light source, and is used for respectively positioning the battery outline or the Mark, preferably the Mark, and the precision is higher.
When the scheme of the first embodiment and the second embodiment is adopted, the laser processing module and the processing platform module do not need to move relatively in the laser processing process. When the scheme of the third embodiment is adopted, the laser processing is finished by adopting a stepping mode for conveying and staying at the processing station.
The processing process is as follows: the light receiving surface of the battery piece 4 is placed on the laser processing module in an upward mode, the CCD shoots and captures the position information of the battery piece 4 and feeds the position information back to the marking control system, and the laser is controlled to directly scan the metal electrode area on the front side.
The utility model is suitable for an all solar cell that need form the contact with metal paste and silicon chip through high temperature sintering is not limited to single crystal or polycrystal, is not limited to P type battery or N type battery, is not limited to single face or double-sided battery.
Although the utility model discloses use solar cell electrode preparation or bad contact's repair equipment to describe for the example, the utility model discloses an equipment also can be applied to other needs and carry out temperature control's equipment to the battery, and technical personnel in this technical field can set up the temperature control module group as required.
The above embodiments are only used for illustrating the design ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all the equivalent changes or modifications made according to the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.
Claims (10)
1. A solar cell electrode preparation or bad contact repair equipment is characterized in that: the device comprises a laser processing module, a processing platform module and a temperature control module; the solar cell is arranged on the processing platform module; laser output by the laser processing module is irradiated on a surface to be prepared or repaired of a solar cell piece on the processing platform module; the temperature control module is used for controlling the temperature of the solar cell on the processing platform module.
2. The apparatus for solar cell electrode preparation or contact failure repair according to claim 1, wherein: the laser processing module comprises a laser, a laser shaping device and a focusing device which are sequentially arranged according to the emitting sequence of laser, and further comprises a cooling module for cooling the laser shaping device and the focusing device.
3. The apparatus for solar cell electrode preparation or contact failure repair according to claim 2, wherein: the temperature control module comprises a heating module and a cooling module; wherein, the heating module is arranged below the processing platform module, and the cooling module is arranged above the processing platform module.
4. The apparatus for solar cell electrode preparation or contact failure repair according to claim 2 or 3, wherein: the equipment is also provided with a mobile module, and the mobile module is connected with at least 1 of the laser processing module and the processing platform module so as to scan the surface to be prepared or repaired of the solar cell piece by laser.
5. The apparatus for solar cell electrode preparation or contact failure repair according to claim 3, wherein: the processing platform module comprises a preheating station, a processing station and a cooling station, and the battery pieces are driven by the driving device to sequentially pass through the stations; wherein the heating module is arranged below the preheating station, the laser processing module is arranged above the processing station, and the cooling module is arranged above the cooling station.
6. The apparatus for solar cell electrode preparation or contact failure repair according to claim 5, wherein: the processing platform module further comprises a feeding station and a discharging station, and the feeding station and the discharging station correspond to the feeding mechanism and the discharging mechanism respectively.
7. The apparatus for solar cell electrode preparation or contact failure repair according to claim 1 or 2, characterized in that: the processing platform module and the temperature control module are composed of suckers with the functions of negative pressure adsorption, preheating and cooling.
8. The apparatus for solar cell electrode preparation or contact failure repair according to claim 1, wherein: the processing platform module is a belt type conveying module which comprises a conveying belt and a driving mechanism; the temperature control module comprises a heating module and a cooling module; the heating module, the laser processing module and the cooling module are sequentially arranged along the conveying direction, wherein the heating module is arranged above and/or below the conveying belt, the laser processing module is arranged above the conveying belt, and the cooling module is arranged above the conveying belt or below the conveying belt.
9. The apparatus for solar cell electrode preparation or contact failure repair according to claim 3 or 8, wherein: the heating module is a heating plate or an infrared lamp tube; the cooling module is an air knife or a cooling plate.
10. The apparatus for solar cell electrode preparation or contact failure repair according to claim 2, wherein: the laser processing module also comprises a scanning device arranged behind the focusing device, and the scanning device comprises a galvanometer and a field lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920973967.6U CN210092114U (en) | 2019-06-26 | 2019-06-26 | Solar cell electrode preparation or poor contact repair equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920973967.6U CN210092114U (en) | 2019-06-26 | 2019-06-26 | Solar cell electrode preparation or poor contact repair equipment |
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| CN210092114U true CN210092114U (en) | 2020-02-18 |
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| CN201920973967.6U Active CN210092114U (en) | 2019-06-26 | 2019-06-26 | Solar cell electrode preparation or poor contact repair equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466983A (en) * | 2020-06-10 | 2021-03-09 | 帝尔激光科技(无锡)有限公司 | Method and equipment for repairing solar cell interface defects |
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2019
- 2019-06-26 CN CN201920973967.6U patent/CN210092114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466983A (en) * | 2020-06-10 | 2021-03-09 | 帝尔激光科技(无锡)有限公司 | Method and equipment for repairing solar cell interface defects |
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| CP02 | Change in the address of a patent holder |
Address after: No. 142, Chunhui East Road, Xishan Economic and Technological Development Zone, Wuxi, Jiangsu 214000 Patentee after: Dier Laser Technology (Wuxi) Co.,Ltd. Address before: 2 Fengwei Road, Xishan Economic and Technological Development Zone, Xishan District, Wuxi City, Jiangsu Province Patentee before: Dier Laser Technology (Wuxi) Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |