A printing device for black photovoltaic busbars

Abstract

The present invention discloses a printing device for black photovoltaic busbars, comprising a printing mechanism and guide mechanisms disposed at the front and rear ends of the printing mechanism. The busbar passes through the front guide mechanism, the printing mechanism, and the rear guide mechanism in sequence. The printing mechanism further comprises a printing base, two support blocks, a horizontal adjustment assembly, and a printing assembly. The support blocks are slidably disposed on the printing base, and the horizontal positions of the support blocks are adjusted by the horizontal adjustment assemblies. The busbar is carried on the support blocks. The printing assembly is disposed above the busbar to print on the surface of the busbar. An air outlet is further disposed on the upper surface of the support block. The present invention replaces an inkjet method with a printing method, thereby reducing ink consumption.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaics, and in particular to a printing device for a black photovoltaic busbar. Background Art

[0002] Photovoltaic welding ribbon, also known as tin-coated copper ribbon, is a flat copper ribbon of a certain size coated with a layer of tin-based solder of uniform thickness. Its main function is to connect the cells and junction boxes and conduct electricity in the production of photovoltaic modules. Its performance indicators are closely related to the current collection efficiency of solar photovoltaic modules, the fragmentation rate of solar cells and the long-term reliability of photovoltaic modules. It is an important material in the welding process of photovoltaic modules. The base of photovoltaic welding ribbon is copper ribbon, and the copper ribbon is hot-dip or electroplated with tin-containing alloy materials such as tin-silver-copper alloy, tin-lead alloy or tin-copper alloy. Figure 1 As shown, the tin coating has a uniform thickness of 15-30 μm, primarily providing protection and soldering. Conventional photovoltaic ribbons have a clean, smooth surface, typically silver in color. Because silver is reflective, a black absorption layer is applied to portions of the ribbon to absorb light.

[0003] Publication No. CN 214599911 U describes a spraying device for high-temperature resistant, single-sided, black, segmented busbar ribbons. A channel for the ribbon is formed between two movable blocks, and inclined surfaces are provided on opposing sides of the movable blocks. A liquid trough is located at the bottom of the inclined surfaces to collect waste liquid from the spraying process. During spraying, ink inevitably gets sprayed between the ribbon and the movable blocks, where it flows onto the workbench and coats the back of the ribbon. Furthermore, inkjet printing can result in ink waste. Summary of the Invention

[0004] In view of the above defects in the prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art and disclose a printing device for black photovoltaic busbars, comprising a printing mechanism and guide mechanisms provided at the front and rear ends of the printing mechanism. The busbars pass through the guide mechanism at the front end, the printing mechanism, and the guide mechanism at the rear end in sequence.

[0005] The printing mechanism includes a printing base, two support blocks, a horizontal adjustment component and a printing component. The support block is slidably arranged on the printing base, and the horizontal position of the support block is adjusted by the horizontal adjustment component respectively. The busbar is carried on the support block, and the printing component is arranged above the busbar to print on the surface of the busbar; an air blowing port is arranged on the upper surface of the support block.

[0006] Furthermore, the angle α between the air outlet and the horizontal plane is 45°-75°.

[0007] Furthermore, the guide mechanism includes a first bracket and at least one set of guide wheel assemblies, the guide wheel assembly includes a first support wheel, a first pressure wheel and a first spring, the first support wheel is fixedly set on the first bracket, the first pressure wheel is vertically slidably set on the first bracket, and the first spring is used to provide downward thrust for the first pressure wheel.

[0008] Furthermore, a damping mechanism is provided between the guide mechanism at the front end and the printing mechanism, and the busbar is tightened by utilizing the damping mechanism.

[0009] Furthermore, the damping mechanism includes a second bracket, a second support wheel, a second pressure wheel, a second spring and a damper. The second support wheel is fixedly set on the second bracket, and the damper is connected to the second support wheel; the second pressure wheel is vertically slidably set on the second bracket, and the second pressure wheel is driven downward by the second spring to be pressed on the second support wheel.

[0010] Furthermore, it also includes a horizontal guide mechanism, which is arranged at the inlet end of the guide mechanism at the front end, and is used to perform horizontal calibration on the busbar.

[0011] Furthermore, the horizontal guide mechanism includes a third bracket, a side guide wheel assembly and the horizontal adjustment assembly, the side guide wheel assembly is slidingly arranged on the third bracket at intervals, and the horizontal adjustment assembly is used to drive the side guide wheel assembly to move horizontally; the side guide wheel assembly includes a base and side guide wheels arranged on the base, and the base is slidingly arranged on the third bracket.

[0012] Furthermore, the level adjustment assembly includes a screw and a handwheel.

[0013] Furthermore, a horizontal plane and an inclined plane are provided on the upper surface of the support block, and the air blowing port is provided on the horizontal plane.

[0014] Furthermore, a blowing nozzle is provided between the guide mechanism at the rear end and the printing mechanism.

[0015] The beneficial effects achieved by the present invention are:

[0016] This invention replaces the inkjet method with a printing method, reducing ink usage. The printing roller can also achieve full-segment printing or segmented printing. Air vents are provided on the support block to prevent ink from flowing to the bottom of the busbar and affecting product quality. A damping mechanism is provided at the front end to keep the busbar taut, improving printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a printing device for a black photovoltaic busbar according to the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the printing mechanism;

[0019] Figure 3 Schematic diagram of the structure of the support block;

[0020] Figure 4 Schematic diagram of the coordination between the guide mechanism and the damping mechanism;

[0021] Figure 5 Schematic diagram of the three-dimensional structure of the horizontal guide mechanism;

[0022] Figure 6 Schematic diagram of the wind direction of the blowing nozzle of the support block;

[0023] The reference numerals are as follows:

[0024] 1. Printing mechanism, 2. Guide mechanism, 3. Horizontal adjustment assembly, 4. Damping mechanism, 5. Horizontal guide mechanism, 6. Blowing nozzle, 11. Printing base, 12. Support block, 13. Printing assembly, 21. First bracket, 22. Guide wheel assembly, 41. Second bracket, 42. Second support wheel, 43. Second pressure wheel, 44. Second spring, 51. Third bracket, 52. Side guide wheel assembly, 121. Blowing port, 122. Horizontal plane, 123. Inclined plane, 221. First support wheel, 222. First pressure wheel, 223. First spring, 521. Base, 522. Side guide wheel. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] A printing device for black photovoltaic busbars, such as Figures 1-6 As shown, it includes a printing mechanism 1 and a guide mechanism 2 arranged at the front and rear ends of the printing mechanism 1. The bus strip passes through the front guide mechanism 2, the printing mechanism 1 and the rear guide mechanism 2 in sequence. The bus strip is guided by the guide mechanisms 2 at both ends and kept at the same height, and the upper surface of the bus strip is printed by the printing mechanism 1.

[0027] The printing mechanism 1 includes a printing base 11, two support blocks 12, a horizontal adjustment assembly 3, and a printing assembly 13. The support block 12 is slidably mounted on the printing base 11 via a guide rail. The horizontal adjustment assembly 3 is mounted on the printing base 11. The horizontal adjustment mechanism 3 drives the support block 12 to move horizontally, thereby adjusting the horizontal position of the support block 12 so that both sides of the lower surface of the busbar are supported on the support blocks 12. The printing assembly 13 is mounted above the busbar to print on the upper surface of the busbar. The printing assembly 13 includes a printing roller and an inking roller. The printing roller is used to print the busbar, and the inking roller is used to transfer ink to the printing roller. The printing assembly 13 is prior art and will not be described in detail here. In addition, a water-based ink printer that facilitates cleaning of the printing roller has been described in detail in Publication No. CN211518853U. In addition, the horizontal adjustment assembly 3 includes a screw 31 and a handwheel 32. One end of the screw 31 is rotatably connected to the support block 12, and the screw 31 is threadedly engaged with the side wall of the printing base 11. A handwheel 32 is provided at the other end of the screw 31, and the screw 31 is driven to rotate by the handwheel 32 to realize axial movement of the screw 31, thereby driving the support block 12 to adjust its position horizontally.

[0028] In the above embodiment, if Figures 1-6 As shown, a blower port 121 is provided on the upper surface of the support block 12. The support block 12 is connected to an air source to eject high-pressure gas from the blower port 121. The blower port 121 is oriented toward the lower surface of the converging strip to prevent ink from flowing to the lower surface and staining the lower surface. Preferably, the angle α between the blower port 121 and the horizontal plane is 45°-75°.

[0029] In one embodiment, if Figures 1-6 As shown, the guide mechanism 2 includes a first bracket 21 and at least one guide wheel assembly 22. The guide wheel assembly 22 includes a first support wheel 221, a first pressure wheel 222, and a first spring 223. The first support wheel 221 is fixed to the first bracket 21. Slideways are provided on both side walls of the first bracket 21. Slideways are provided within the slideways. The two ends of the first pressure wheel 222 are connected to the slideways. Furthermore, the first spring 223 is provided within the slideway. The two ends of the first spring 223 act on the slideway and the first bracket 21, respectively, providing downward thrust to the first pressure wheel 222. The busbar passes between the first support wheel 221 and the first pressure wheel 222.

[0030] During use, in order to improve the printing quality, the busbar needs to be straightened during printing. In a preferred embodiment, a damping mechanism 4 is provided between the front guide mechanism 2 and the printing mechanism. During use, the busbar reeling mechanism pulls the busbar to move, and the damping mechanism applies resistance to the busbar to achieve tightening of the busbar. Specifically, the damping mechanism 4 includes a second bracket 41, a second support wheel 42, a second pressure wheel 43, a second spring 44, and a damper (not shown). The second support wheel 42 is fixed to the second bracket 41 and connected to the damper so that the second support wheel 42 has resistance when rotating. Slide grooves are provided on the two side walls of the second bracket 41, and a slider is provided in the slide groove. The two ends of the second pressure wheel 43 are connected to the slider. The second spring 44 is provided in the slide groove. The two ends of the second spring 44 act on the slider and the second bracket 41 respectively, and the second spring 44 is used to provide a downward thrust for the second pressure wheel 43.

[0031] In one embodiment, if Figures 1-6 As shown, the printing device also includes a horizontal guide mechanism 5, which is disposed at the inlet end of the front guide mechanism 2 and is used to horizontally calibrate the busbar. Specifically, the horizontal guide mechanism 5 includes a third bracket 51, a side guide wheel assembly 52, and a horizontal adjustment assembly 3. The side guide wheel assembly 52 is slidably disposed on the third bracket 51 at intervals, and is driven horizontally by the horizontal adjustment assembly 3. The side guide wheel assembly 52 includes a base 521 and side guide wheels 522 arranged on the base 521. The base 521 is slidably disposed on the third bracket 51. The horizontal adjustment assembly 3 includes a screw 31 and a handwheel 32. One end of the screw 31 is rotatably connected to the base 521, and the screw 31 is threadedly engaged with the side wall of the third bracket 51. The other end of the screw 31 is provided with a handwheel 32, which drives the screw 31 to rotate, thereby achieving axial movement of the screw 31, thereby driving the side guide wheel assembly 52 to adjust its horizontal position.

[0032] In one embodiment, if Figures 1-6 As shown, the upper surface of the support block 12 is provided with a horizontal surface 122 and an inclined surface 123, and the blowing port 121 is provided on the horizontal surface 122. When in use, the lower surface of the converging strip partially covers the blowing port 121, so that air blows toward the lower surface of the converging strip and blows away excess ink to the sides. Ink that falls on the inclined surface 123 slides down and does not flow back to the converging strip.

[0033] In one embodiment, if Figures 1-6 As shown, a blowing nozzle 6 is provided between the guide mechanism 2 at the rear end and the printing mechanism 1. Air is blown toward the upper surface of the converging strip through the blowing nozzle 6 to dry the ink and prevent the ink from being transferred to the guide mechanism 2 at the rear end before it dries.

[0034] In the present invention, Figures 1-6As shown, the busbar first passes through the horizontal guide mechanism 5, the front guide mechanism 2, the damping mechanism 4, the printing mechanism 1, and the rear guide mechanism 2. The printing assembly then prints black ink on the surface of the busbar, blowing away excess ink from the sides to prevent it from flowing to the bottom of the busbar. The top surface of the busbar is then dried by the blower nozzle 6. Finally, it passes through the guide mechanism 2 and enters the reel mechanism at the rear end. The entire top surface of the busbar can be printed black by attaching a rubber sheet to the entire printing roller; alternatively, the rubber sheet can be attached to a portion of the printing roller to achieve segmented black printing of the busbar.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced with equivalents without departing from the spirit and scope of the present invention, they should be included in the scope of protection of the claims of the present invention.

Claims

1. A printing device for black photovoltaic busbars, characterized in that: It includes a printing mechanism and guide mechanisms arranged at the front and rear ends of the printing mechanism, and the busbar passes through the guide mechanism at the front end, the printing mechanism and the guide mechanism at the rear end in sequence; The printing mechanism includes a printing base, two support blocks, a horizontal adjustment assembly, and a printing assembly. The support blocks are slidably arranged on the printing base, and the horizontal positions of the support blocks are adjusted by the horizontal adjustment assemblies. The busbar is carried on the support blocks. The printing assembly is arranged above the busbar to print on the surface of the busbar. An air blowing port is arranged on the upper surface of the support block. The angle α between the air outlet and the horizontal plane is 45°-75°; The guide mechanism includes a first bracket and at least one set of guide wheel assemblies, the guide wheel assembly includes a first support wheel, a first pressure wheel and a first spring, the first support wheel is fixedly arranged on the first bracket, the first pressure wheel is vertically slidably arranged on the first bracket, and the first spring is used to provide downward thrust for the first pressure wheel; It also includes a horizontal guide mechanism, which is arranged at the inlet end of the guide mechanism at the front end, and is used to perform horizontal calibration on the busbar; The horizontal guide mechanism includes a third bracket, a side guide wheel assembly and the horizontal adjustment assembly. The side guide wheel assembly is slidingly arranged on the third bracket at intervals, and the horizontal adjustment assembly is used to drive the side guide wheel assembly to move horizontally; the side guide wheel assembly includes a base and side guide wheels arranged on the base, and the base is slidingly arranged on the third bracket.

2. The printing device for a black photovoltaic busbar according to claim 1, characterized in that: A damping mechanism is provided between the guide mechanism at the front end and the printing mechanism, and the busbar is tightened by utilizing the damping mechanism.

3. The printing device for a black photovoltaic busbar according to claim 2, characterized in that: The damping mechanism includes a second bracket, a second support wheel, a second pressure wheel, a second spring and a damper. The second support wheel is fixedly set on the second bracket, and the damper is connected to the second support wheel; the second pressure wheel is vertically slidably set on the second bracket, and the second pressure wheel is driven downward by the second spring to be pressed on the second support wheel.

4. The printing device for a black photovoltaic busbar according to claim 1, characterized in that: The level adjustment assembly includes a screw rod and a hand wheel.

5. The printing device for a black photovoltaic busbar according to claim 1, characterized in that: The upper surface of the support block is provided with a horizontal surface and an inclined surface, and the air blowing port is provided on the horizontal surface.

6. The printing device for a black photovoltaic busbar according to claim 1, characterized in that: An air blowing nozzle is provided between the guide mechanism at the rear end and the printing mechanism.

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