Black bus bar manufacturing tool

Abstract

The utility model provides a black bus bar manufacturing tool, which comprises a bus bar unwinding mechanism, a spraying mechanism, a heating channel and a bus bar winding mechanism, the unwinding mechanism and the winding mechanism are matched with each other to enable a bus bar to keep tension to pass through the spraying mechanism, the spraying mechanism comprises a base, two shielding arms are arranged on the base, and the heating channel is arranged on the base. The ends of the shielding arms oppositely protrude to form shielding parts and spraying openings, bus bars can pass through the shielding parts, the spraying openings and the base, and the bus bars sprayed with the black coating on the spraying mechanism pass through the heating channel, so that the sprayed black coating is heated and fixed. According to the tool, roll-to-roll production of the black bus bars is achieved, the automation degree is high, the transformation cost of an existing production line is low, and large-scale popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a manufacturing tool for a black bus bar. Background Art

[0002] Black photovoltaic modules are increasingly used in the photovoltaic field due to their pure black appearance, zero color difference between modules, and high aesthetics.

[0003] Due to its significant cost-effectiveness and practicality, 0BB (Zero Busbar) technology has become a key technology strategy in the photovoltaic industry in recent years. The application of 0BB technology to black modules, due to its lack of a busbar and the presence of numerous and thinner secondary busbars, requires the use of smaller diameter solder ribbons, further enhancing the module's aesthetics. Even on different building exteriors and at varying tilt angles, the modules maintain a highly consistent all-black appearance and aesthetic effect.

[0004] However, because 0BB technology requires smaller diameter solder ribbons, traditional 0BB ribbons cannot currently be made completely black while ensuring effective weldability and reliability. Directly welding the interconnect ribbon to the busbar would inevitably expose the silver ribbon alloy layer, severely impacting the consistent black appearance of the 0BB black module. Therefore, we have designed a black busbar for connecting cell strings in stacked grid black modules or 0BB black modules. This ensures weldability and reliability while maintaining the consistent and aesthetically pleasing appearance of the black module. Utility Model Content

[0005] The purpose of the utility model is to provide a black busbar manufacturing tool to meet the production needs of the black busbar.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A tool for manufacturing a black busbar includes a busbar unwinding mechanism, a spraying mechanism, a heating channel and a busbar winding mechanism. The unwinding mechanism and the winding mechanism cooperate with each other to keep the busbar in tension as it passes through the spraying mechanism. The spraying mechanism includes a base, on which two shielding arms are installed. The ends of the shielding arms protrude relative to each other to form a shielding part and a spraying port. The busbar is accommodated between the shielding part, the spraying port and the base. The busbar sprayed with black paint in the spraying mechanism passes through the heating channel so that the sprayed black paint is heated and fixed.

[0008] Preferably, a punching mechanism is further included to punch holes in the busbar sprayed with black paint to produce a black punched busbar.

[0009] More preferably, the punching mechanism is located between the heating channel and the winding mechanism to achieve assembly line production of the black perforated busbar.

[0010] Preferably, the shielding arm is mounted on the base through an adjusting bolt, and the base has a telescopic opening for accommodating the movement of the shielding arm.

[0011] Preferably, the shielding arm is installed below the base, and the spraying port opens downward. When the bus bar passes through the spraying mechanism, black paint is sprayed on the bus bar from bottom to top.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. Currently, similar partially blackened busbar products on the market are all produced using a screen printing plate-to-plate process. The use of the above-mentioned tooling can achieve mass production of black busbars using a roll-to-roll process.

[0014] 2. The solution of this utility model has a high degree of automation, and the entire process from spraying, curing to punching is fully automated;

[0015] 3. The spraying technology and equipment used are mature, and the cost of modifying the existing production line is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the production tool of the utility model;

[0017] Figure 2 It is a structural diagram of the spraying mechanism of the utility model production tool;

[0018] Figure 3 Shows a normal bus bar before painting;

[0019] Figure 4 Shows the black busbar after painting;

[0020] Figure 5 The black busbars are shown after being punched.

[0021] In the figure: 1. Unwinding mechanism; 2. Spraying mechanism; 3. Heating channel; 4. Rewinding mechanism; 5. Bus bar; 6. Black bus bar; 7. Base; 8. Shielding arm; 9. Spray port; 10. Adjusting bolt; 11. Telescopic port; 12. Ordinary bus bar; 13. Blank area; 14. Blackened area. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] The utility model designs a black busbar production tool, such as Figure 1 As shown, the tooling includes a busbar unwinding mechanism 1, a spraying mechanism 2, a heating channel 3, and a busbar rewinding mechanism 4. The unwinding mechanism 1 and the rewinding mechanism 4 cooperate with each other to keep the busbar 5 in tension, and the busbar is sprayed by the spraying mechanism 2 to form a black busbar 6.

[0026] The main body of the spraying mechanism 2 is composed of a base 7 and a shielding arm 8. Figure 2As shown, the ends of the shielding arms 8 are relatively protruding to form a shielding portion and a spray port 9. When the busbar 5 passes through, the nozzle sprays black paint from the spray port 9 to the busbar 5 to form a black busbar 6. The inner and outer surfaces of the spraying mechanism are preferably made of Teflon material, which can effectively prevent the problem of paint accumulation on the surface of the tooling and difficult to clean. The base 7 and the shielding arms 8 can be made into versions with different widths and shielding widths. At the same time, the bottoms of the two shielding arms 8 are fixed with screws with adjustable heights. The telescopic opening 11 installed on the base 7 by adjusting the bolts 10 can adapt to busbars of different thicknesses and also enable it to shield and spray busbars of different specifications. Due to the process characteristics of spraying, bottom spraying can be adopted, that is, the spray port 9 opens downward, which can avoid the penetration of slurry into the mechanism; at the same time, the spray gun used in conjunction with the shielding mechanism can directly use existing and matching models on the market without the need for special customization. Example 1

[0027] The material to be processed is a common photovoltaic bus bar 12, which is characterized by a thickness of 0.1 mm, a width of 8 mm, and a material of Sn60Pb40 alloy. Figure 3 The black slurry used for spraying is characterized by being water-based and having a viscosity of 100 Pda.s.

[0028] Use Figure 2 The shielding spray mechanism shown here features an 8mm-wide, height-adjustable through-hole within the tooling, with Teflon surfaces inside and outside. When a busbar passes through the through-hole, two shielding arms block the busbar by 2mm above and below, leaving a 4mm-wide area in the middle. The coating is then applied to the unshielded 4mm area through bottom spraying.

[0029] According to the production process of the present invention, a busbar with a width of 8 mm is unwound and passed through a shielding spraying mechanism at a certain rate, and the nozzle distance is controlled to ensure that the coating surface is smooth and the thickness is 10-20 μm; the sprayed busbar is pulled through a heating channel by a reel, and the temperature of the heating channel is 100-120°C, and the heating time is 3-6 minutes, to obtain a black busbar with a blank area 13 and a blackened area 14, as shown in FIG. Figure 4 As shown, the final step is to roll up.

[0030] The black busbar can be punched along the length direction by a punching machine before or after winding. The punching characteristics are: punching length 8mm, punching width 4mm, punching gap 2mm, punching in the middle of the top and bottom, and the punched black busbar product is obtained, such as Figure 5 shown. Example 2

[0031] The material to be processed is a common photovoltaic busbar, which is characterized by a thickness of 0.1 mm, a width of 8 mm, and a material of Sn60Pb40 alloy. Figure 3The black slurry used for spraying is characterized by being water-based and having a viscosity of 100 Pda.s.

[0032] Use shielding spraying mechanism, such as Figure 2 As shown, the interior of the spraying mechanism is composed of an 8mm wide and height-adjustable through-hole, and the inner and outer surfaces are made of Teflon material. By replacing different types of shielding arms, the busbar is shielded by 1.5mm width at the top and bottom, leaving a 5mm width area in the middle. The unshielded 5mm area in the middle is covered with the coating by spraying at the bottom.

[0033] Use Figure 1 The production process shown is as follows: a busbar with a width of 8 mm is unwound and passed through a shielded spraying mechanism at a certain rate. The nozzle distance is controlled to ensure that the coating surface is smooth and the thickness is 10-20 μm. The sprayed busbar is then pulled through a heating channel with the heating channel temperature set to 120°C. The pulling speed is set so that the busbar is heated in the heating channel for 3 minutes to obtain a black busbar, which is then rewound.

[0034] The black busbar can be punched along the length direction by a punching machine before or after winding. The punching characteristics are: punching length 8mm, punching width 5mm, punching gap 2mm, punching in the middle of the top and bottom, and the punched black busbar product is obtained, such as Figure 5 shown.

[0035] The utility model discloses a tool for producing black busbars. The tool adopts a method of shielding the upper and lower sides of the busbar, and cooperates with the spraying process to achieve partial blackening of the busbar product. The surface material of the tool of the utility model is preferably a non-stick material such as Teflon, so that the slurry used for spraying will not condense on the surface. The shielding arm of the spraying mechanism of the tool is height-adjustable and can be used with busbars of different thicknesses. The spraying mechanism preferably adopts an inverted spraying method to prevent excess slurry from overflowing to areas that do not need to be sprayed.

[0036] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A black busbar manufacturing tool, comprising a busbar unwinding mechanism, a spraying mechanism, a heating channel and a busbar winding mechanism, characterized in that: The unwinding mechanism and the rewinding mechanism cooperate with each other to keep the busbar under tension as it passes through the spraying mechanism. The spraying mechanism includes a base on which two shielding arms are installed. The ends of the shielding arms protrude relative to each other to form a shielding part and a spraying port. The busbar is accommodated between the shielding part, the spraying port and the base. The busbar sprayed with black paint in the spraying mechanism passes through a heating channel so that the sprayed black paint is heated and fixed.

2. The tooling for manufacturing the black busbar according to claim 1, wherein: It also includes a punching mechanism for punching holes in the busbars that have been sprayed with black paint.

3. The tooling for manufacturing the black busbar according to claim 2, wherein: The punching mechanism is located between the heating channel and the winding mechanism.

4. The tooling for manufacturing a black busbar according to claim 1, wherein: The shielding arm is mounted on the base through an adjusting bolt, and the base is provided with a telescopic opening for accommodating the movement of the shielding arm.

5. The tooling for manufacturing the black busbar according to claim 1, wherein: The shielding arm is installed under the base, and the spraying port opens downward. When the bus bar passes through the spraying mechanism, black paint is sprayed on the bus bar from bottom to top.

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