CN114407507B - Solar cell fine grid preparation method and device - Google Patents
Solar cell fine grid preparation method and device Download PDFInfo
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- CN114407507B CN114407507B CN202011170968.0A CN202011170968A CN114407507B CN 114407507 B CN114407507 B CN 114407507B CN 202011170968 A CN202011170968 A CN 202011170968A CN 114407507 B CN114407507 B CN 114407507B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052709 silver Inorganic materials 0.000 claims abstract description 42
- 239000004332 silver Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims description 30
- 230000033001 locomotion Effects 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000007639 printing Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 8
- 238000012797 qualification Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000007650 screen-printing Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004881 precipitation hardening Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/08—Machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a method and a device for preparing a solar cell fine grid, and belongs to the technical field of photovoltaics. The invention automatically adjusts the processing gap between the die head and the surface of the battery piece and the feeding speed in a constant direction in real time, ensures the uniformity and consistency of the thickness of the grid line and the continuity of the length of the grid line, greatly improves the preparation efficiency and the qualification rate of the finished product of the grid line, simultaneously improves the utilization rate of silver paste to the maximum extent and reduces the production cost.
Description
Technical Field
The invention relates to a method and a device for preparing a solar cell fine grid, and belongs to the technical field of photovoltaics.
Background
With the deep implementation of low-carbon economic development strategy, low-cost and high-efficiency solar cells have become an important link for new energy development. The photosensitive panel of the traditional solar cell has a serious influence on the charge collection capacity because a considerable proportion of area is occupied by the grid lines, so that the photoelectric conversion efficiency is low and becomes the biggest bottleneck for restricting the development of the solar cell. It can be seen that the maximum increase of the effective photosensitive area is a key path for improving the photoelectric conversion efficiency of the solar cell. Therefore, the improvement of the solar cell grid line preparation process is carried out by breaking through the new process and the new method from the aspect of reducing the shading area of the grid line as much as possible, so that the geometric dimension of the cell grid line is effectively reduced, and the area occupation ratio of the cell grid line in the photosensitive panel is reduced as much as possible.
The current method for preparing the grid line of the solar cell is a screen printing method, the minimum line width and the minimum thickness of the minimum pattern are limited by the mesh, the geometric dimension of the grid line electrode pattern processing is large and no lifting space exists, and on one hand, the grid line occupies a larger area occupation ratio in the photosensitive panel directly; on the other hand, causes great consumption of silver paste material. In order to comprehensively realize the technical bottleneck of grid line preparation, the invention is urgently needed to invent a novel preparation method of the solar cell grid line with high cell conversion efficiency and low production cost.
With the rapid development of new photovoltaic energy, low-temperature silver paste gradually replaces high-temperature silver paste and is widely applied to the preparation of the grid lines of heterojunction battery plates. Compared with high-temperature silver paste, the low-temperature silver paste contains a large amount of flaky particles, and when the screen printing technology is used for preparing the grid line, the screen plate is damaged, so that the grid line is not beneficial to forming. Therefore, the novel preparation method of the solar cell grid line should also solve the practical production and use problems of the rigid carrier and silver paste bearing at the same time.
Disclosure of Invention
The invention solves the technical problems of limited aspect ratio, low photoelectric conversion efficiency, large contact resistance, large silver paste consumption and the like of the traditional screen printing preparation grid line type.
A solar cell fine grid fabrication apparatus comprising:
the vacuum adsorption platform is used for fixing the battery piece in an adsorption mode;
the multidimensional movement assembly is used for driving the vacuum adsorption platform to do feeding movement;
and the spraying die head is used for printing the slurry on the surface of the battery piece to form fine grids.
In one embodiment, the multi-dimensional motion assembly is capable of achieving feed in three directions X, Y, Z.
In one embodiment, the multidimensional movement assembly comprises a Z-direction feeding mechanism, an X-direction feeding mechanism and a Y-direction feeding mechanism.
In one embodiment, the method further comprises: and the silver paste injection device is used for injecting paste into the spraying die head.
In one embodiment, the method further comprises: the surface of the vacuum adsorption platform is provided with adsorption air holes which are connected with a vacuum pump.
In one embodiment, the spray die comprises: a gasket is pressed between the first die head and the second die head; the first die head and the second die head are communicated through a gasket, and a micro-channel is formed in the bottom of the gasket.
In one embodiment, the width of the bottom outlet of the micro flow channel is 5-50 ㎛.
In one embodiment, the number of the micro-channels is a plurality of, and the micro-channels are sequentially arranged in a linear shape.
In one embodiment, the number of microchannels is 100-500; the micro-channels are spaced apart from each other by 10-50 ㎛.
In one embodiment, the first die is in communication with a silver paste injection device.
In one embodiment, the first die head and/or the second die head is/are provided with an inner cavity towards the direction of the gasket, a multi-channel feed port is arranged in the first die head, and the inner cavity is communicated with the silver paste injection device through the multi-channel feed port.
In one embodiment, the first die, the second die and the gasket are fixedly connected through bolts through bolt holes.
In one embodiment, the inner chamber is fan-shaped, the circular arc is upward, and the circular arc is provided with a drainage groove which is communicated with the multichannel feed inlet.
In one embodiment, the method further comprises: and the control computer is used for controlling the multi-dimensional motion assembly.
In one embodiment, the method further comprises: and the laser displacement sensor is used for detecting the feeding motion of the multidimensional motion assembly and feeding back the result to the control computer.
A preparation method of a solar cell fine grid comprises the following steps:
step 1, placing the battery piece on a vacuum adsorption platform, and starting a vacuum pump to enable the battery piece to be adsorbed and fixed;
step 2, pressing the slurry into a spraying die head through a silver slurry injection device, so that the slurry is pressed out of the micro-channel;
and 3, printing the slurry fine grid on the surface of the battery piece through the feeding movement of the multidimensional movement assembly.
Advantageous effects
1. The invention automatically adjusts the processing gap between the die head and the surface of the battery piece and the feeding speed in a constant direction in real time, ensures the uniformity and consistency of the thickness of the grid line and the continuity of the length of the grid line, greatly improves the preparation efficiency and the qualification rate of the finished product of the grid line, simultaneously improves the utilization rate of silver paste to the maximum extent and reduces the production cost.
2. According to the invention, the rigid material spraying die head is introduced as a silver paste carrier for preparing the fine grid line, so that the problem that friction resistance of flaky particles in low-temperature silver paste is increased and a screen printing screen is scratched is effectively solved, and the production efficiency and the finished product qualification rate of heterojunction battery grid line preparation are practically improved.
3. The invention introduces the vacuum adsorption table to realize the flexible fixation of the battery piece, reliably ensures the surface smoothness and uniformity of the whole processing process of the battery piece, and meets the green manufacturing requirement.
4. Compared with the traditional coating method, the precise spraying die head device for preparing the thin grid line has the advantages that slurry is split through the design of the fine flow channel, a slit linear spraying effect is generated on the surface of a substrate, and the reliable preparation of the thin grid line with the width of 5-50 ㎛ is completed. For the field of new photovoltaic energy, the device breaks through the technical barriers that the geometric parameters of grid line preparation in the field of new photovoltaic energy are limited, successfully solves the problems in the existing grid line preparation process, such as limited aspect ratio, low photoelectric conversion efficiency, large contact resistance, large silver paste consumption and the like, and effectively improves the process preparation capacity and production efficiency.
Drawings
FIG. 1 is a schematic diagram of a negative feedback system.
Fig. 2 is a schematic diagram of the working principle of the present invention.
FIG. 3 is a schematic view of a vacuum adsorption platform.
Fig. 4 is a schematic view of a spray die.
FIG. 5 is an axial schematic view of a die of the present invention.
FIG. 6 is a schematic view of a first die of the present invention.
FIG. 7 is a second die of the present invention.
Fig. 8 is a schematic view of a gasket of the present invention.
FIG. 9 is a schematic view of a microchannel according to the present invention.
Wherein, silver thick liquid injection device (1), control computer (2), laser displacement sensor (3), spraying die head (4), battery piece (5) and, vacuum adsorption platform (6), multidimensional movement subassembly (7), first die head (40), second die head (41), gasket (42), multichannel feed inlet (44), inner chamber (45), drainage groove (46), bolt hole (47), microchannel (48), absorption gas pocket (61), induction port (62), Z to feed mechanism (70), X to feed mechanism (71), Y to feed mechanism (72), base (73)
Description of the embodiments
The invention provides a method and a device for preparing and printing a solar cell fine grid line, which are composed of a silver paste injection device, a control computer, a laser displacement sensor, a multidimensional movement assembly, a vacuum adsorption platform, a spraying die head and the like. Compared with the traditional screen printing preparation grid line processing method, the silver paste is split by the spraying die head provided with a plurality of micro flow channels, and the continuous feeding of the multidimensional movement assembly in the constant direction is matched, so that the fine grid line with the width range of 5-50 ㎛ can be adjusted and prepared at any width, the limit of the aspect ratio of the fine grid line is broken through, and the photoelectric conversion efficiency is effectively improved. The invention automatically adjusts the processing gap between the die head and the surface of the battery piece and the feeding speed in a constant direction in real time, ensures the uniformity and consistency of the thickness of the grid line and the continuity of the length of the grid line, greatly improves the preparation efficiency and the qualification rate of the finished product of the grid line, simultaneously improves the utilization rate of silver paste to the maximum extent and reduces the production cost; the invention adopts the vacuum adsorption table to fix the battery piece in a flexible way, and reliably ensures the surface smoothness and uniformity of the whole processing process of the battery piece.
The flow of the preparation method of the invention is shown in figure 1, and the adopted device is shown in figure 2.
The device comprises a silver paste injection device 1, a control computer 2, a laser displacement sensor 3, a spraying die head 4, a battery piece 5, a vacuum adsorption platform 6 and a multidimensional movement assembly 7. The spraying die head 4 is fixed right above the battery piece 5 through a bracket; the battery piece 5 is fixed on the vacuum adsorption platform 6 through vacuum adsorption; the silver paste injection device 1 is connected with the spraying die head 4 through a runner; the device is also provided with a control device comprising a control computer 2 and a laser displacement sensor 3.
The silver paste injection device 1 adopts a micro screw valve for feeding, the outlet pressure of the screw valve reaches 5-12 kg, and the flow reaches more than 0.04 ml/s. The control computer 2 employs an ARM-based CPU. The laser displacement sensor 3 adopts a Kidney 3D line laser measuring instrument. The multidimensional movement assembly 7 comprises a Z-direction feeding mechanism 70, an X-direction feeding mechanism 71, a Y-direction feeding mechanism 72 and a base 73; the base 73 is provided with a Y-direction feeding mechanism 72, the Y-direction feeding mechanism 72 is provided with an X-direction feeding mechanism 71, the X-direction feeding mechanism 71 is provided with a Z-direction feeding mechanism 70, and the Z-direction feeding mechanism 70 is provided with a vacuum adsorption table 6.
As shown in fig. 3, the vacuum adsorption table 6 is a square platform, and a plurality of adsorption holes are formed in the platform, and the outer contours of the arrangement of the holes are consistent with those of the battery pieces, so that the reliability of the adsorption in the processing process is ensured. The area of the vacuum adsorption table and the adsorption air hole 61 is 150X 150mm to 500X 500mm. The bottom of the vacuum adsorption platform is provided with an air suction port 62 which is connected with the vacuum pump through an air pipe.
As shown in fig. 4 and 5, the spray die 4 includes a first die 40, a second die 41, and a shim 42; the first die 40 and the second die 42 are detachably connected, as shown in fig. 6 and 7, and are fixed to each other by mounting bolts in bolt holes 47, and the gasket 42 is fixed between the first die 40 and the second die 41 by bolting.
The structure of the first die 40 is shown in fig. 7, and a multi-channel feed port 44 is arranged on the side surface, and the feed port 44 is communicated with the silver paste injection device 1 and is used for adding paste into the die; an inner cavity 45 is arranged at the joint end of the side surface of the second die head 41 and the first die head 40, and the inner cavity 45 is a sector cavity. The upper end of the inner chamber 45 is provided with a plurality of drainage grooves 46 for smoothly guiding silver paste to flow into the cavity, and the cavity structure is narrow in top and wide in bottom so as to reduce the flow resistance of the paste, prevent the deposition of the paste and ensure the continuity and uniformity of the discharge of the paste in the spraying process. The assembled multichannel feed inlet 44 is directly opposite to the drainage groove 46 so as to be communicated with the air outlet 43 and the inner cavity 45 to form a closed space for storing slurry, and when slurry is injected and printed, the slurry is continuously fed, so that the slurry can be kept in a low-temperature state as much as possible on one hand, and the flow of silver slurry is promoted so as to ensure the freshness and quality of the slurry.
The gasket 42 is preferably made of martensitic precipitation-hardening stainless steel SUS630, has a hardness of HRC35-39, and has a thickness preferably ranging from 50 to 100 μm, and has a length and width consistent with the die size. As shown in FIG. 8, the bottom of the gasket 42 (opposite to the direction in the drawing with respect to FIGS. 4-7) is provided with a fan-shaped hollowed-out area which is consistent with the shape and size of the inner chamber 45 of the second die 41, and the front end of the fan-shaped hollowed-out area is provided with a sinking area, the length of which is preferably 1mm, and the sinking thickness of which is preferably 30 μm to 50 μm. The submerged area is provided with a plurality of protrusions, and the height of the protrusions is preferably in the range of about 30-50 μm to ensure that the upper surfaces of the protrusions are flush with the surfaces of the gaskets, thereby ensuring that the protrusions are in gapless fit with the first die 40 and the second die 41 so as to ensure the tightness of the whole die. As shown in fig. 9, a plurality of micro-channels 48 are formed between a plurality of protrusions in the fan-shaped sinking area of the gasket 42, the number of the micro-channels 48 is preferably 100-500, the micro-channels are funnel-shaped and have wide upper part and narrow lower part, and the number of the width of the lower diameter opening of the micro-channel is preferably 5-50 ㎛; after the slurry is fed, the slurry forms pressure in the inner chamber 45, so that the slurry is uniformly oozed out of the micro-channels 48, and the fine grid is formed by matching with the feeding of the three-dimensional working platform.
The die is preferably made of martensitic precipitation hardening stainless steel SUS630, and has a hardness of HRC35-39, and the die is preferably provided with the following parameters: the working face flatness is 0.003mm, the roughness Ra0.02, the rest surface roughness Ra0.08 and the lip straightness is 0.003mm. The size range is as follows: 220-320 mm long, 80-120 mm wide and 100-150 mm high. Through the design of the fine flow channel, slurry flow distribution is realized, a slit linear spraying effect is generated on the surface of the substrate, and the reliable preparation of the fine grid line with the width of 5-50 ㎛ is completed.
The technical scheme of the invention is further described below in connection with the preparation steps, and the method comprises the following steps:
step 1, firstly, selecting and designing a reasonable spraying die head 4 (comprising the number and the width of micro-channels of a gasket) according to the requirements of the size, the width, the number and the like of the prepared grid lines of the battery piece 5.
And 2, fixing the designed spraying die head 4 on a bracket, connecting the spraying die head with the silver paste injection device 1, and adjusting the multidimensional movement assembly 7 to enable the die head to be placed at the starting position. Placing the battery piece 5 on a vacuum adsorption table 6, and starting a vacuum pump to carry out vacuum adsorption; the closed-loop control system is formed by the control computer 2, the laser displacement sensor 3 and the multidimensional movement assembly 7, so that the machining gap adjustment and the real-time feedback adjustment of the feeding speed are performed. The regulating system negative feedback system is shown in fig. 5.
And 3, installing a quick plug at a multichannel feed inlet of the second die head 41, connecting the quick plug with a screw valve through a hose, enabling the outlet pressure of the screw valve to reach 5-12 kg, enabling the flow rate of the screw valve to reach more than 0.04ml/s, enabling the screw valve to ensure constant pressure and flow rate when slurry is injected into the screw valve through an injector, continuously feeding the slurry into a fan-shaped cavity through the hose from the multichannel feed inlet and a drainage groove, converging the slurry into a fan-shaped hollowed-out area on the gasket 42, and further shunting the slurry through a micro-channel, and converting the flow rate of the slurry into point flow. The silver paste injection device 1 is started, silver paste is injected into the spraying die head 4 through a runner, when the silver paste fills the cavity of the second die head 41 to form certain pressure, the silver paste flows into the micro-runner at the bottom of the gasket 42 to be split, and the fine grid line is prepared by matching with the feeding of the multidimensional motion platform 7 in the X direction or the Y direction, and meanwhile, the preparation of the fine grid line on the substrate is realized by matching with the continuous feeding and the interval regulation of the multidimensional motion assembly in the constant direction.
The battery piece size is as follows: 156.75-210 mm.
The silver paste comprises high-temperature silver paste and low-temperature silver paste, when the battery piece is a heterojunction solar battery, the low-temperature silver paste is selected, the viscosity of the low-temperature silver paste is 40-60 Pa.s, and the tension angle of the low-temperature silver paste and the battery piece is less than 90 degrees.
The machining gap is preferably: 10-50 and ㎛; the feed speed is preferably 0-800mm/s:
the Z-direction feeding mechanism, the X-direction feeding mechanism and the Y-direction feeding mechanism have the travel range of 200-500mm and the repeated positioning accuracy of 2-3 ㎛.
The method and the device for preparing and printing the thin grid line of the solar cell can break through the limit of the width of the grid line in the traditional hard brushing method, improve the aspect ratio of the grid line, enhance the photoelectric conversion efficiency and reduce the contact resistance; meanwhile, the invention forms a closed-loop detection control system by controlling the calculator, the laser displacement sensor and the multidimensional movement assembly, and adjusts the processing gap between the die head and the surface of the battery piece and the constant-direction feeding speed in real time so as to ensure the consistency of the thickness of the grid line and the continuity of the preparation of the grid line, greatly increase the preparation efficiency of the grid line, reduce the waste of silver paste and reduce the production cost. The above description should not be taken as limiting the present patent. It should be noted that several modifications may be made without departing from the principles of the present invention, which modifications are intended to fall within the scope of the present invention.
Claims (4)
1. A solar cell fine grid preparation device, characterized by comprising:
the vacuum adsorption platform (6) is used for fixing the battery piece (5) in an adsorption mode;
the multidimensional movement assembly (7) is used for driving the vacuum adsorption platform (6) to do feeding movement;
a spraying die head (4) for printing the slurry on the surface of the battery piece (5) to form a fine grid;
the multidimensional movement assembly (7) can realize feeding in three directions X, Y, Z; the multidimensional movement assembly (7) comprises a Z-direction feeding mechanism (70), an X-direction feeding mechanism (71) and a Y-direction feeding mechanism (72);
further comprises: a silver paste injection device (1) for injecting paste into the spraying die head (4); further comprises: an adsorption air hole (61) is arranged on the surface of the vacuum adsorption platform (6), and the adsorption air hole (61) is connected with a vacuum pump;
the structure of the spraying die head (4) comprises: a first die head (40) and a second die head (41), wherein a gasket (42) is pressed between the first die head (40) and the second die head (41); the first die head (40) is communicated with the second die head (41) through a gasket (42), and a micro-channel (48) is formed at the bottom of the gasket (42);
the bottom outlet width of the micro flow channel (48) is 5-50 ㎛; the number of the micro flow channels (48) is multiple, and the micro flow channels are sequentially arranged in a linear shape; the number of the micro-channels (48) is 100-500; the micro flow channels (48) are spaced from each other by 10-50 ㎛;
the first die head (40) is communicated with the silver paste injection device (1); an inner cavity (45) is formed in the direction of the first die head (40) and/or the second die head (41) towards the gasket (42), a multi-channel feed port (44) is formed in the first die head (40), and the multi-channel feed port (44) is used for communicating the inner cavity (45) with the silver paste injection device (1);
the first die head (40), the second die head (41) and the gasket (42) are fixedly connected through bolts through bolt holes (47); the inner chamber (45) is fan-shaped as a whole, the circular arc faces upwards, the circular arc is provided with a drainage groove (46), and the drainage groove (46) is communicated with the multi-channel feed inlet (44).
2. The solar cell fine grid manufacturing apparatus according to claim 1, further comprising: and the control computer (2) is used for controlling the multidimensional movement assembly (7).
3. The solar cell fine grid manufacturing apparatus according to claim 1, further comprising: and the laser displacement sensor (3) is used for detecting the feeding motion of the multi-dimensional motion assembly (7) and feeding back the result to the control computer (2).
4. A method for manufacturing a solar cell fine grid manufacturing apparatus according to claim 1, comprising the steps of: step 1, placing the battery piece (5) on a vacuum adsorption platform (6), and starting a vacuum pump to enable the battery piece (5) to be adsorbed and fixed; step 2, pressing the slurry into a spraying die head (4) through a silver slurry injection device 1, so that the slurry is pressed out of a micro-channel (48); and 3, printing the slurry fine grid on the surface of the battery piece (5) through the feeding movement of the multidimensional movement assembly (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011170968.0A CN114407507B (en) | 2020-10-28 | 2020-10-28 | Solar cell fine grid preparation method and device |
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| CN202011170968.0A CN114407507B (en) | 2020-10-28 | 2020-10-28 | Solar cell fine grid preparation method and device |
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| CN103456835A (en) * | 2013-07-31 | 2013-12-18 | 华中科技大学 | Device and method for preparing gate electrodes of solar cell |
| WO2017201971A1 (en) * | 2016-05-24 | 2017-11-30 | 欧贝黎新能源科技股份有限公司 | Method and device for repairing broken gate line in solar cell |
| CN107662401A (en) * | 2016-07-31 | 2018-02-06 | 青岛瑞元鼎泰新能源科技有限公司 | A kind of equipment and technique for printing dereliction grid cell piece front electrode |
| CN217522026U (en) * | 2020-10-28 | 2022-09-30 | 江苏载驰科技股份有限公司 | Solar cell fine grid preparation device |
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