High-efficiency solar cell printing equipment

Abstract

The present invention discloses a highly efficient solar cell printing device. By adopting two sets of printing mechanisms, two sets of printing channels, two sets of first loading and unloading mechanisms, and two sets of second loading and unloading mechanisms, and simultaneously using two sets of transfer mechanisms to transfer solar cells between the printing channels and the two sets of first loading and unloading mechanisms and the two sets of second loading and unloading mechanisms, uninterrupted printing operation of the printing mechanism is achieved, the printing production efficiency is improved, the production cost is reduced, and the competitiveness of the enterprise is enhanced. At the same time, the CCD positioning system camera is used to capture the image of the mark point of the solar cell, and after calculation and positioning by the control system, the DD motor is used to accurately correct the position of the solar cell, improving the printing accuracy and printing quality, enabling finer grid lines and lower contact resistance, thereby creating higher cell efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing, and particularly to a high-efficiency inkjet printing device for solar cell wafers. Background Art

[0002] Digital inkjet printing technology was first developed in the fields of desktop document printing and inkjet painting, and has gradually been applied to industrial inkjet printing. Its principle is to use digital program control to make the corresponding functional ink pass through a nozzle with tiny orifices and be ejected to a predetermined position on the surface of the material to be processed, so as to form a preset pattern. This process technology has many advantages such as digitization, large area, low cost, environmental friendliness, and flexible production, and has been widely applied in many industries such as food, building materials, medicine, chemical industry, and electronics.

[0003] The sustainable development of energy and the environment has become a hot issue of global concern. Photovoltaic power generation has advantages that cannot be compared with traditional energy sources, realizing the direct conversion of solar energy into electrical energy, and is the most ideal and sustainable green energy. The demand for solar cell wafers will also be increasing, so the research and development of related production process equipment is very meaningful. The production equipment for solar cell wafers is the main equipment in the production process of cell wafers, directly affecting the photoelectric conversion efficiency of the cell wafers.

[0004] However, the existing digital printing systems applied to industry generally operate on a single platform. Although the platform is provided with a feeding system, a discharging system, and a printing system, when printing products, the feeding or discharging needs to wait until the printing of the product is completed before it can continue to work. The degree of automation and production efficiency are generally low, and it cannot meet the needs of large-scale production of products. At the same time, due to the manufacturing process limitations of the cell wafers, the running straightness requirement during the printing process of the cell wafers is within 10 um, and it is difficult for the existing platform to achieve the running accuracy during the printing process of the cell wafers. Summary of the Invention

[0005] In order to overcome the above defects, the present invention provides a high-efficiency inkjet printing device for solar cell wafers that can not only improve the degree of production automation and production efficiency, but also meet the printing accuracy of the cell wafers.

[0006] The technical solution adopted by the present invention to solve its technical problems is: to provide a high-efficiency inkjet printing device for solar cell wafers, including a device base, a first gantry bracket horizontally arranged on the device base, and a printing mechanism arranged on the first gantry bracket. CCD positioning mechanisms, a first loading and unloading mechanism, and a second loading and unloading mechanism are sequentially and symmetrically arranged on both sides of the first gantry bracket. The CCD positioning mechanism is arranged on the device base through a second gantry bracket, and the second gantry bracket, the first loading and unloading mechanism, and the second loading and unloading mechanism are arranged parallel to the first gantry bracket;

[0007] A longitudinal printing channel is provided between the two CCD positioning mechanisms on the equipment base. A printing carrier table and a first driving mechanism are provided on the printing channel, and the first driving mechanism drives the printing carrier table to move back and forth on the printing channel;

[0008] A transfer mechanism is longitudinally installed on the equipment base, and the transfer mechanism is used to transfer products between the printing carrier table and the first loading and unloading mechanism or the second loading and unloading mechanism.

[0009] As a further improvement of the present invention, the printing mechanism includes two groups of printing modules; each printing module includes a printing bracket provided on the first gantry bracket, a nozzle holder and an ink supply device provided on the printing bracket, and a nozzle assembly provided on the nozzle holder. The nozzle assembly includes multiple groups of nozzles for printing products and a fourth driving mechanism for driving the nozzles to move horizontally or vertically.

[0010] As a further improvement of the present invention, the printing bracket is slidably connected to the first gantry bracket.

[0011] As a further improvement of the present invention, two groups of printing channels are provided. Two groups of printing carrier tables and two groups of first driving mechanisms are provided on the printing channels, and the printing carrier tables and the first driving mechanisms are arranged in correspondence.

[0012] As a further improvement of the present invention, the printing carrier table includes a slider provided on the printing channel, a DD motor provided on the slider, and an adsorption platform provided on the upper end surface of the DD motor.

[0013] As a further improvement of the present invention, the CCD positioning mechanism includes two groups of CCD positioning systems. Each CCD positioning system includes a positioning frame provided on the second gantry bracket and two groups of horizontal adjusting rods provided on the positioning frame; two groups of cameras are provided on the horizontal adjusting rods.

[0014] As a further improvement of the present invention, the horizontal adjusting rod is movably connected to the positioning frame; the camera is movably connected to the horizontal adjusting rod.

[0015] As a further improvement of the present invention, the first loading and unloading mechanism includes two groups of first conveyor belts arranged in parallel at intervals and a second driving mechanism for driving the first conveyor belts to run; the second loading and unloading mechanism includes two groups of second conveyor belts arranged in parallel at intervals and a third driving mechanism for driving the second conveyor belts to run.

[0016] As a further improvement of the present invention, the transfer mechanism includes a slide rail, two suction cups disposed on the slide rail, and a driving mechanism for driving the suction cups to move back and forth along the slide rail; the suction cups are symmetrically arranged on both sides of the slide rail.

[0017] As a further improvement of the present invention, the height of the camera is higher than the height of the transfer mechanism.

[0018] As a further improvement of the present invention, a nozzle maintenance component is provided on the equipment base, and a nozzle cleaning groove corresponding to the nozzle is provided on the nozzle maintenance component.

[0019] As a further improvement of the present invention, the equipment base includes an intermediate base and first bases symmetrically arranged on both sides of the intermediate base; the intermediate base is provided with the printing mechanism, the CCD positioning mechanism, the printing channel and the nozzle maintenance component; the first bases are provided with the first loading and unloading mechanism, the second loading and unloading mechanism and the transfer mechanism.

[0020] The beneficial effects of the present invention are as follows: Two sets of printing mechanisms, two sets of printing channels, two sets of first loading and unloading mechanisms and two sets of second loading and unloading mechanisms are adopted. At the same time, two sets of transfer mechanisms are used to transfer the solar cell wafers between the printing channels and the two sets of first loading and unloading mechanisms and the two sets of second loading and unloading mechanisms, realizing continuous printing operation of the printing mechanism and improving the printing efficiency. At the same time, the positioning system uses the CCD camera to capture the mark point image of the solar cell wafer, and after calculating and positioning through the control system, the DD motor is used to accurately correct the position of the solar cell wafer, improving the printing accuracy and printing quality. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the present invention;

[0022] Figure 2 It is a schematic structural diagram of another perspective of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the printing mechanism and the printing channel of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the printing carrier platform of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the positioning mechanism of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the loading and unloading mechanism and the transfer mechanism of the present invention.

[0027] The following description is made in conjunction with the accompanying drawings:

[0028] 1. First loading and unloading mechanism; 101. First conveyor belt; 102. Second driving mechanism; 103. First bracket; 2. Second loading and unloading mechanism; 201. Second conveyor belt; 202. Third driving mechanism; 3. Inkjet printing mechanism; 301. First gantry bracket; 302. Equipment base; 3021. Intermediate base; 3022. First base; 303. Inkjet printing bracket; 304. Nozzle holder; 305. Ink supply device; 306. Fourth driving mechanism; 307. Fifth driving mechanism; 4. CCD positioning mechanism; 401. Second gantry bracket; 402. CCD positioning system; 4021. Positioning frame; 4022. Transverse adjusting rod; 4023. Camera; 5. Inkjet printing channel; 501. Inkjet printing carrier platform; 5011. Slide block; 5012. DD motor; 5013. Adsorption platform; 5014. Grating scale; 502. First driving mechanism; 6. Transfer mechanism; 601. Slide rail; 602. Suction cup; 603. Second bracket; 7. Nozzle maintenance component; 701. Nozzle cleaning tank. Detailed implementation mode

[0029] The following is a detailed description of a preferred embodiment of the present invention in conjunction with the accompanying drawings.

[0030] Refer to Figure 1 and Figure 2 The high-efficiency solar cell inkjet printing equipment provided by the present invention includes an equipment base 302, a first gantry bracket 301 horizontally arranged on the equipment base 302, and an inkjet printing mechanism 3 arranged on the first gantry bracket 301. Among them, CCD positioning mechanisms 4, a first loading and unloading mechanism 1, and a second loading and unloading mechanism 2 are symmetrically arranged on both sides of the first gantry bracket 301 in sequence. The CCD positioning mechanism 4 is arranged on the equipment base 302 through a second gantry bracket 401, and the second gantry bracket 401, the first loading and unloading mechanism 1, and the second loading and unloading mechanism 2 are arranged parallel to the first gantry bracket 301.

[0031] A longitudinal inkjet printing channel 5 is arranged on the equipment base 302 between the two CCD positioning mechanisms 4. An inkjet printing carrier platform 501 and a first driving mechanism 502 are arranged on the inkjet printing channel 5. The first driving mechanism 502 drives the inkjet printing carrier platform 501 to move back and forth on the inkjet printing channel 5, and both ends of the inkjet printing channel 5 extend to both ends of the equipment base 302.

[0032] Two groups of transfer mechanisms 6 are longitudinally arranged on the equipment base 302. The two groups of transfer mechanisms 6 straddle above the first loading and unloading mechanism 1 and the second loading and unloading mechanism 2 on both sides respectively, and are used to transfer products between the inkjet printing carrier platform 501 and the first loading and unloading mechanism or the second loading and unloading mechanism 2.

[0033] The above-mentioned first loading and unloading mechanism 1, second loading and unloading mechanism 2, inkjet printing mechanism 3, CCD positioning mechanism 4, inkjet printing channel 5, and transfer mechanism 6 are all connected to a computer control system (not marked in the figure), and the control system is used to control the coordinated operation between the various mechanisms.

[0034] Refer to Figure 3 , the inkjet printing mechanism 3 includes two groups of inkjet printing modules; each group of inkjet printing modules includes an inkjet printing bracket 303 provided on the first gantry bracket 301, a nozzle holder 304 and an ink supply device 305 provided on the inkjet printing bracket 303, and a nozzle assembly provided on the nozzle holder 304. The nozzle assembly includes multiple groups of nozzles for inkjet printing products and a fourth driving mechanism 306 for driving the nozzles. The inkjet printing bracket 303 is slidably connected to the first gantry bracket 301. Corresponding to each group of inkjet printing modules on the first gantry bracket 301, there are guide rails, and a fifth driving mechanism 307 drives the inkjet printing bracket 303 to move back and forth on the corresponding guide rails. There are multiple nozzles on the nozzle assembly to quickly complete the inkjet printing process for the products to be inkjet printed. At the same time, the guide rails are linearly arranged to make the inkjet printing process stable and ensure high-quality inkjet printing effects. Among them, the inkjet printing mechanism 3 can open one group of inkjet printing modules or two groups simultaneously according to production capacity requirements.

[0035] Furthermore, two groups of inkjet printing channels 5 are provided below the inkjet printing mechanism 3. Each group of inkjet printing channels 5 is provided with two groups of inkjet printing platforms 501 and two groups of first driving mechanisms 502, and the inkjet printing platforms 501 and the first driving mechanisms 502 are correspondingly arranged. The first driving mechanism 502 is used to drive the inkjet printing platform 501 to move back and forth between the inkjet printing mechanism 3 and the CCD positioning mechanism 4.

[0036] Refer to Figure 4 , the inkjet printing platform 501 includes a slider 5011 provided on the inkjet printing channel 5, a DD motor 5012 provided on the slider 5011, and an adsorption platform 5013 provided on the upper end surface of the DD motor 5012. The DD motor 5012 is used to correct the position of the solar cell on the adsorption platform 5013 before inkjet printing.

[0037] Among them, a photoelectric induction switch is provided on one side of the DD motor 5012 to limit the rotation angle of the DD motor 5012, playing the role of resetting and stopping when the signal reaches the position. At the same time, a grating ruler 5014 is installed inside the slider 5011 to detect the running distance of the inkjet printing platform 501 on the inkjet printing channel 5, so as to accurately control the start and stop positions of the inkjet printing platform 501 moving back and forth between the inkjet printing mechanism 3 and the CCD positioning mechanism 4. To ensure that the linearity during the inkjet printing process of the solar cell is within 10um.

[0038] Further, the adsorption platform 5013 is used to carry solar cells, and is provided with a plurality of air holes thereon, which can ensure that the solar cells carried thereon are tightly adsorbed during the conveying process without displacement and movement.

[0039] Refer to Figure 5 , CCD positioning mechanisms 4 are symmetrically arranged on both sides of the printing mechanism. The CCD positioning mechanism 4 includes two groups of CCD positioning systems 402. Each group of CCD positioning systems 402 includes a positioning frame 4021 arranged on the second gantry bracket 401, a transverse adjusting rod 4022 arranged on the positioning frame 4021, and a camera 4023 arranged on the transverse adjusting rod 4022. There are two groups of transverse adjusting rods 4022, and each group of transverse adjusting rods 4022 can be longitudinally adjusted on the positioning frame 4021; there are four groups of cameras 4023, and two groups of cameras 4023 are arranged on each group of transverse adjusting rods 4022, and each group of cameras 4023 can be transversely adjusted on the transverse adjusting rod 4022.

[0040] Among them, the distance between the two transverse adjusting rods 4022 on each group of positioning frames 4021 can be longitudinally adjusted according to the distance between the required mark points, and the 4 groups of cameras can also be transversely adjusted respectively, so that the CCD positioning system 402 can perform mark point positioning on special-shaped products. At the same time, a compensation light source is sleeved on one of the four groups of cameras 4023 to ensure the clarity of the captured points.

[0041] That is to say, each group of CCD positioning systems 402 can position the product to be printed on the printing stage 501 below it. The printing stage 501 carrying the solar cells to be printed moves to the lower part of the CCD positioning mechanism 4 through the printing channel 5. The mark point images of the solar cells are captured by the 4 groups of cameras 4023 of the CCD positioning system 402, and the positioning is calculated through the control system. Then, the position of the solar cells is accurately corrected by the DD motor 5012 under the adsorption platform 5013. The battery cells with corrected positions are carried to the printing mechanism 3 for inkjet printing to ensure the printing accuracy.

[0042] Further, a nozzle maintenance component 7 is provided on the equipment base 302. A nozzle cleaning tank 701 corresponding to the nozzle is provided on the nozzle maintenance component 7. A collection box is arranged below the nozzle cleaning tank 701 to clean the nozzles on the nozzle rack 304, thereby ensuring the graphic quality and accuracy of the solar cell printing. At the same time, the nozzle maintenance component 7 is arranged outside the printing mechanism 3, which is convenient for manual maintenance and cleaning.

[0043] Refer to Figure 6, the first loading and unloading mechanism 1 includes two groups of first conveyor belts 101 arranged in parallel at intervals, and a second driving mechanism 102 for driving the operation of the first conveyor belts 101; the second loading and unloading mechanism 2 includes two groups of second conveyor belts 201 arranged in parallel at intervals, and a third driving mechanism 202 for driving the operation of the second conveyor belts 201. The first loading and unloading mechanism 1 and the second loading and unloading mechanism 2 are arranged in parallel at intervals and are respectively horizontally mounted on the equipment base 302 through a first support 103. Among them, the first conveyor belts 101 and the second conveyor belts 201 are flat belts. At the same time, both the first loading and unloading mechanism 1 and the second loading and unloading mechanism 2 can be set as a loading mechanism for conveying products to be printed or a unloading mechanism for conveying products that have completed printing according to requirements through a control system.

[0044] Furthermore, the transfer mechanism 6 includes a slide rail 601, two suction cups 602 provided on the slide rail 601, and a driving mechanism for driving the suction cups 602 to move back and forth along the slide rail 601; the two suction cups 602 are symmetrically arranged on both sides of the slide rail 601. The transfer mechanism 6 is arranged on a second support 603, and the second support 603 is longitudinally arranged above the first loading and unloading mechanism 1 and the second loading and unloading mechanism 2 and is mounted on the equipment base 302 to ensure that the height of the slide rail 601 is higher than that of the first loading and unloading mechanism 1 and the second loading and unloading mechanism 2. The upper ends of the two suction cups 602 are fixed on a suction cup fixing member, and the driving mechanism drives the suction cup fixing member to move back and forth on the slide rail 601, thereby driving the suction cups 602 to move back and forth on the slide rail 601. The suction cups 602 do not interfere with the operating first loading and unloading mechanism 1 and second loading and unloading mechanism 2 during operation and can clamp the products on the first loading and unloading mechanism 1 and the second loading and unloading mechanism 2. The connection of the suction cups 602 to a pneumatic device is well known to those skilled in the art and will not be elaborated here.

[0045] Among them, the height of the transfer mechanism 6 is lower than the height of the camera 4023 to ensure that there is no interference between the suction cups 602 and the CCD positioning mechanism 4 during the transfer of the solar cell wafers.

[0046] Furthermore, to make the present invention more flexible, the equipment base 302 includes an intermediate base 3021 and first bases 3022 symmetrically arranged on both sides of the intermediate base 3021; the intermediate base 3021 is provided with a printing mechanism 3, a CCD positioning mechanism 4, a printing channel 5, and a nozzle maintenance component 7; the first bases 3022 are provided with the first loading and unloading mechanism 1, the second loading and unloading mechanism 2, and the transfer mechanism 6. The intermediate base 3021 is a marble base. The first bases 3022 and the intermediate base 3021 can be quickly disassembled and connected. That is to say, if the first loading and unloading mechanism 1, the second loading and unloading mechanism 2, and the transfer mechanism 6 are idle, they can be used for other equipment according to requirements, making it have greater production value.

[0047] Specifically, the working process of the present invention is as follows:

[0048] Before use, the first loading and unloading mechanism 1 is used as the loading mechanism, and the second loading and unloading mechanism 2 is used as the unloading mechanism. The four printing carriers 501 of the two printing channels 5 are respectively parked below the four CCD positioning systems 402.

[0049] Solar cells are loaded simultaneously from the loading mechanisms on both sides. The transfer mechanism 6 picks up the solar cells from the loading mechanism and transports them to the printing carrier 501. After being photographed and positioned by the CCD positioning system 402, the position is corrected, and then it is transported below the printing mechanism 3 for printing operations.

[0050] After the printing operation is completed, the printing carrier 501 carrying the printed solar cells returns below the CCD positioning system 402. The transfer mechanism 6 picks up the printed solar cells and places them on the unloading mechanism for transportation out of the printing equipment. At the same time, another printing carrier 501 transports the solar cells to be printed below the printing mechanism 3 for printing operations, and the above operation process is cycled.

[0051] The loading and unloading of solar cells are carried out simultaneously. Each time, 2 products are transported by the transfer mechanism 6, and the CCD positioning system and the printing mechanism of each product do not affect each other. At the same time, the wax spraying or inkjet process of solar cells can be completed using the present invention.

[0052] In summary, the present invention adopts two printing mechanisms, two printing channels, two first loading and unloading mechanisms, and two second loading and unloading mechanisms. At the same time, two transfer mechanisms are used to transfer solar cells between the printing channels and the two first loading and unloading mechanisms and the two second loading and unloading mechanisms, realizing uninterrupted printing operations of the printing mechanism, improving printing production efficiency, reducing production costs, and enhancing the competitiveness of enterprises. At the same time, the CCD positioning system camera is used to capture the image of the mark point of the solar cell, and after calculation and positioning by the control system, the DD motor is used to accurately correct the position of the solar cell, improving the printing accuracy and printing quality, and enabling thinner grid lines and lower contact resistance, thereby creating higher battery efficiency.

[0053] Numerous specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. All those that do not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A highly efficient solar cell printing device, comprising a device base (302), a first gantry bracket (301) horizontally arranged on the device base (302), and a printing mechanism (3) arranged on the first gantry bracket (301), characterized in that: On both sides of the first gantry bracket (301), a CCD positioning mechanism (4), a first loading and unloading mechanism (1), and a second loading and unloading mechanism (2) are symmetrically arranged in sequence. The CCD positioning mechanism (4) is arranged on the device base (302) through a second gantry bracket (401). The second gantry bracket (401), the first loading and unloading mechanism (1), and the second loading and unloading mechanism (2) are arranged parallel to the first gantry bracket (301); A longitudinal printing channel (5) is arranged on the device base (302) between the two CCD positioning mechanisms (4). A printing carrier table (501) and a first driving mechanism (502) are arranged on the printing channel (5). The first driving mechanism (502) drives the printing carrier table (501) to move back and forth between the printing mechanism (3) and the CCD positioning mechanism (4); A transfer mechanism (6) is longitudinally installed on the device base (302). The transfer mechanism (6) is used to transfer products between the printing carrier table (501) and the first loading and unloading mechanism or the second loading and unloading mechanism (2); The printing mechanism (3) includes two groups of printing modules; There are two groups of printing channels (5). On each group of printing channels (5), two printing carrier tables (501) and two first driving mechanisms (502) are arranged. The printing carrier table (501) is correspondingly arranged with the first driving mechanism (502); The printing carrier table (501) includes a slider (5011) arranged on the printing channel (5), a DD motor (5012) arranged on the slider (5011), and a suction platform (5013) arranged on the upper end surface of the DD motor (5012); The transfer mechanism (6) includes a slide rail (601), two suction cups (602) arranged on the slide rail (601), and a driving mechanism for driving the suction cups (602) to move back and forth along the slide rail (601); the suction cups (602) are symmetrically arranged on both sides of the slide rail (601); the transfer mechanism (6) is arranged on a second bracket (603). The second bracket (603) longitudinally straddles above the first loading and unloading mechanism (1) and the second loading and unloading mechanism (2) and is arranged on the device base (302).

2. The high-efficiency solar cell printing device according to claim 1, characterized in that: The printing module includes a printing bracket (303) arranged on the first gantry bracket (301), a nozzle holder (304) and an ink supply device (305) arranged on the printing bracket (303), and a nozzle assembly arranged on the nozzle holder (304); the nozzle assembly includes multiple groups of nozzles for printing products, and a fourth driving mechanism (306) for driving the nozzles to move horizontally or longitudinally.

3. The high-efficiency solar cell printing device according to claim 2, characterized in that: The inkjet printing bracket (303) is slidably connected to the first gantry bracket (301).

4. The high-efficiency solar cell printing device according to claim 1, characterized in that: The CCD positioning mechanism (4) includes two sets of CCD positioning systems (402). The CCD positioning system (402) includes a positioning frame (4021) provided on the second gantry bracket (401), and two sets of lateral adjusting rods (4022) provided on the positioning frame (4021); two sets of cameras (4023) are provided on the lateral adjusting rods (4022).

5. The high-efficiency solar cell printing device according to claim 4, characterized in that: The lateral adjusting rod (4022) is movably connected to the positioning frame (4021); the camera (4023) is movably connected to the lateral adjusting rod (4022).

6. The high-efficiency solar cell printing device according to claim 5, characterized in that: The first loading and unloading mechanism (1) includes two sets of first conveyor belts (101) arranged in parallel at intervals, and a second driving mechanism (102) for driving the first conveyor belts (101) to operate; the second loading and unloading mechanism (2) includes two sets of second conveyor belts (201) arranged in parallel at intervals, and a third driving mechanism (202) for driving the second conveyor belts (201) to operate.

7. The high-efficiency solar cell printing device according to claim 5, wherein: The height of the camera (4023) is higher than the height of the transfer mechanism (6).

8. The high-efficiency solar cell printing device according to claim 3, wherein: A nozzle maintenance assembly (7) is provided on the equipment base (302), and a nozzle cleaning tank (701) corresponding to the nozzle is provided on the nozzle maintenance assembly (7).

9. The high-efficiency solar cell printing device according to claim 8, wherein: The equipment base (302) includes an intermediate base (3021) and first bases (3022) symmetrically provided on both sides of the intermediate base (3021); the inkjet printing mechanism (3), the CCD positioning mechanism (4), the inkjet printing channel (5) and the nozzle maintenance assembly (7) are provided on the intermediate base (3021); the first loading and unloading mechanism (1), the second loading and unloading mechanism (2) and the transfer mechanism (6) are provided on the first bases (3022).

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