Bussing bar welding method and welding machine for solar photovoltaic cell strings

Abstract

The present invention relates to technical fields such as the manufacturing of solar photovoltaic cell string welding equipment, and provides a method for welding a bus bar of a solar photovoltaic cell string and a welding machine. By controlling the contact between the end of the cell string of the photovoltaic cell string and a bus bar with a preset length, the welding mechanism welds the contact position. At the spacer attaching station, the spacer attaching mechanism attaches the spacer to the bus bar isolation position of the photovoltaic cell string, thereby improving the efficiency of manually attaching the spacer, reducing the cost of attaching the spacer, reducing the fluctuation of the attaching quality of the spacer, and reducing the risk of damage to the photovoltaic cell string.

Description

Technical Field

[0001] The present invention relates to the technical fields of manufacturing solar photovoltaic cell string welding equipment, manufacturing components of photovoltaic equipment, and manufacturing electrical component assemblies, etc., and particularly relates to a method for welding bus bars of a solar photovoltaic cell string and a bus bar welding machine for a solar photovoltaic cell string. Background Art

[0002] In a solar photovoltaic system, the conductive strip that connects the solder tapes at both ends of a single string or multiple strings of cell strings is usually referred to as a bus bar (which can also be called a bus strip). The main functions of the bus bar include: current collection, electrical energy conduction, enhancing connection stability, facilitating wiring and connecting to an external circuit, and realizing circuit connection configuration, etc. Current collection means collecting the current generated by the cell string to achieve a larger current output. Electrical energy conduction means efficiently conducting the electrical energy generated by the cell string and reducing resistance loss. Enhancing connection stability means providing a more stable connection and reducing the risk of contact resistance and connection failures. Facilitating wiring and connecting to an external circuit means enabling the electrical energy generated by the cell string to be more conveniently connected and transmitted to an external circuit or equipment such as an inverter. Realizing circuit connection configuration means meeting the requirements of series or parallel connection circuits between cell strings, so as to flexibly adjust the voltage and current output of the photovoltaic system to adapt to different application scenarios and load requirements. For example, the bus strip can be used to achieve series or parallel connection between cell strings, enabling the photovoltaic system to provide different voltage and current combinations according to actual needs. During the production process of solar photovoltaic cell string products, it is necessary to attach isolation components, such as isolation strips, isolation tapes, isolation papers, etc., to the bus bar isolation positions on the photovoltaic cell string. The isolation components used in solar photovoltaic lamination and bus bar welding may also be referred to as "separator", "insulating isolation component", "protective isolation component", and "barrier strip / tape / paper", etc. After attaching the isolation component to the bus bar isolation position, it can prevent the bus bar from directly contacting the surface of the photovoltaic cell string and causing a short circuit. Moreover, since the photovoltaic cell string is fragile, after attaching the isolation component to the bus bar isolation position, the isolation component can form a buffer between the photovoltaic cell string and the bus bar, playing a protective role for the photovoltaic cell string. In the prior art, the attachment of the isolation component mostly occurs on the photovoltaic cell string assembly formed after the welding of the bus bar and the cell string end of the photovoltaic cell string, and the isolation component is manually attached to the bus bar isolation position on the photovoltaic cell string. Manually attaching the isolation component not only has low efficiency and high cost, but also due to reasons such as different levels of proficiency, the attachment quality is difficult to be unified, and even the photovoltaic cell string may be damaged.

[0003] In summary, in the prior art of bus bar welding for solar photovoltaic cell strings, there are technical problems such as low efficiency, high cost, large fluctuations in attachment quality, and a relatively high risk of damaging the photovoltaic cell string in manually attaching the isolation component. Summary of the Invention

[0004] In view of the deficiencies of the above-mentioned existing technologies, the present invention provides a method and a welding machine for welding busbars of a solar photovoltaic cell string, so as to improve the efficiency of manually attaching isolation parts, reduce the cost of attaching isolation parts, reduce the fluctuation of the quality of attaching isolation parts, and reduce the risk of damage to the photovoltaic cell string.

[0005] In a first aspect, the present invention provides a method for welding busbars of a solar photovoltaic cell string, including:

[0006] Controlling the end of the cell string of the photovoltaic cell string to contact a busbar of a preset length, and welding the contact position through a welding mechanism;

[0007] At the isolation part attaching station, attaching the isolation part to the busbar isolation position of the photovoltaic cell string through an isolation part attaching mechanism.

[0008] In a second aspect, the present invention provides a welding machine for welding busbars of a solar photovoltaic cell string. The welding machine for welding busbars of the solar photovoltaic cell string welds the busbars of the solar photovoltaic cell string by applying the above-mentioned method for welding busbars of a solar photovoltaic cell string.

[0009] Compared with the existing technologies, the beneficial effects of the present invention are as follows:

[0010] The present invention provides a method and a welding machine for welding busbars of a solar photovoltaic cell string. By controlling the end of the cell string of the photovoltaic cell string to contact a busbar of a preset length and welding the contact position through a welding mechanism, and at the isolation part attaching station, attaching the isolation part to the busbar isolation position of the photovoltaic cell string through an isolation part attaching mechanism, thereby improving the efficiency of manually attaching isolation parts, reducing the cost of attaching isolation parts, reducing the fluctuation of the quality of attaching isolation parts, and reducing the risk of damage to the photovoltaic cell string. Description of the Drawings

[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0012] Figure 1 is a schematic flow chart of a method for welding busbars of a solar photovoltaic cell string according to an embodiment of the present invention;

[0013] Figure 2 is a schematic structural diagram of a busbar clamping and feeding mechanism located on the feeding side of a welding platform according to an embodiment of the present invention;

[0014] Figure 3 It is a schematic structural diagram of a bus bar welding machine for a solar photovoltaic cell string according to an embodiment of the present invention;

[0015] Figure 4 It is a schematic structural diagram of a bus bar clamping and feeding mechanism for a bus bar welding machine for a solar photovoltaic cell string according to an embodiment of the present invention, showing two stations;

[0016] Figure 5 It is a schematic structural diagram of a mirror image setting of a bus bar clamping and feeding mechanism at a first station and a bus bar supply device at the first station according to an embodiment of the present invention;

[0017] Figure 6 It is a schematic structural diagram of an isolation member feeding and shearing mechanism according to an embodiment of the present invention;

[0018] Figure 7 It is a schematic structural diagram of a bus bar clamping and feeding mechanism accurately clamping a bus bar after shearing, shaping and forming on one side of a bus bar supply device according to an embodiment of the present invention;

[0019] Figure 8 It is a schematic structural diagram of a tray on a tray feeding mechanism according to an embodiment of the present invention;

[0020] Figure 9 It is a schematic structural diagram of a photovoltaic cell string assembly on a tray on a tray positioning, transporting and discharging mechanism according to an embodiment of the present invention.

[0021] Explanation of reference numerals:

[0022] 100, bus bar clamping and feeding mechanism; 1000, bus bar clamping and feeding mechanism at the first station; 10000, first bus bar clamping and feeding mechanism; 10001, second bus bar clamping and feeding mechanism; 1001, bus bar clamping and feeding mechanism at the second station;

[0023] 101, bus bar supply device; 1010, bending and shaping mechanism; 1011, pressing and shaping mechanism; 1012, shearing mechanism; 1013, bus bar supply device at the first station; 10130, first bus bar supply device; 10131, second bus bar supply device;

[0024] 102, welding platform; 103, photovoltaic cell string feeding and transporting mechanism; 104, welding mechanism; 105, photovoltaic cell string positioning mechanism; 106, feeding area of photovoltaic cell string; 107, isolation member attaching mechanism; 1070, isolation member feeding and shearing mechanism; 1071, isolation member sucking and attaching mechanism; 108, battery string transfer belt transporting mechanism; 109, tray positioning, transporting and discharging mechanism; 110, tray feeding mechanism; 111, heating device; 112, photovoltaic cell string assembly. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] See Figures 1-9 , this embodiment provides a method for welding a bus bar of a solar photovoltaic cell string, including the following steps:

[0028] S101. Control the cell string end of the photovoltaic cell string to contact a bus bar of a preset length, and weld the contact position through a welding mechanism. Preferably, controlling the cell string end of the photovoltaic cell string to contact a bus bar of a preset length and welding the contact position through a welding mechanism may include: transporting the photovoltaic cell string and the bus bar of the preset length formed by shearing to a welding station, where the photovoltaic cell string includes a bus bar isolation position, controlling the cell string end of the photovoltaic cell string to contact the bus bar of the preset length, and welding the contact position through a welding mechanism 104; or, controlling the cell string end of the photovoltaic cell string to contact the bus bar of the preset length formed by shearing, transporting the cell string end of the photovoltaic cell string after contact and the bus bar of the preset length to a welding station, and welding the contact position through a welding mechanism 104;

[0029] S102. At an isolator attachment station, attach an isolator to the bus bar isolation position of the photovoltaic cell string through an isolator attachment mechanism 107.

[0030] It should be noted that in this embodiment, by transporting the photovoltaic cell string and the bus bar of the preset length formed by shearing to a welding station, where the photovoltaic cell string includes a bus bar isolation position, controlling the cell string end of the photovoltaic cell string to contact the bus bar of the preset length, and welding the contact position through a welding mechanism, or, controlling the cell string end of the photovoltaic cell string to contact the bus bar of the preset length formed by shearing, transporting the cell string end of the photovoltaic cell string after contact and the bus bar of the preset length to a welding station, and welding the contact position through a welding mechanism, and at the isolator attachment station, attaching an isolator to the bus bar isolation position of the photovoltaic cell string through an isolator attachment mechanism, the efficiency of manually attaching the isolator is improved, the cost of attaching the isolator is reduced, the fluctuation of the quality of attaching the isolator is reduced, and the risk of damage to the photovoltaic cell string is reduced.

[0031] In some preferred embodiments, transporting the photovoltaic cell string and the bus bar of a preset length formed by shearing to the welding station may include: setting a welding platform 102 at the welding station, and transporting the photovoltaic cell string to the photovoltaic cell string loading side of the welding platform; transporting the bus bar of the preset length formed by shearing to the bus bar loading side of the welding platform.

[0032] It should be noted that at the spacer attaching station, the spacer is attached to the busbar isolation position of the photovoltaic cell string through the spacer attaching mechanism, including but not limited to the following preferred embodiments, so as to achieve various options for spacer attachment and meet the needs of different production practices. In some preferred embodiments, before or after the welding mechanism welds the contact position, at the spacer attaching station, the spacer is attached to the busbar isolation position of the photovoltaic cell string through the spacer attaching mechanism. Further, when the spacer attachment occurs before the welding mechanism welds the contact position, the spacer attaching station is arranged on the conveyor belt mechanism for transporting the photovoltaic cell string to the welding station; the spacer attaching mechanism attaches the spacer to the busbar isolation position of the photovoltaic cell string located on the conveyor belt mechanism. Additionally, when the spacer attachment occurs before the welding mechanism welds the contact position, the spacer attaching station is arranged in the loading area 106 of the photovoltaic cell string, and the loading area of the photovoltaic cell string places the photovoltaic cell string that needs to be transported to the welding station; the spacer attaching mechanism 107 attaches the spacer to the busbar isolation position of the photovoltaic cell string located in the loading area of the photovoltaic cell string. In some preferred embodiments, the loading area 106 of the photovoltaic cell string is provided, and the loading area of the photovoltaic cell string is used to place the photovoltaic cell string that needs to be transported to the welding station; when the spacer attachment occurs before the welding mechanism welds the contact position, before the photovoltaic cell string is placed in the loading area of the photovoltaic cell string, at the spacer attaching station, the spacer is attached to the busbar isolation position of the photovoltaic cell string through the spacer attaching mechanism. In some preferred embodiments, when the spacer attachment occurs before the welding mechanism welds the contact position, the spacer attaching station is arranged on the photovoltaic cell string positioning mechanism 105, and the photovoltaic cell string positioning mechanism positions the photovoltaic cell string that needs to be transported to the welding station; the spacer attaching mechanism attaches the spacer to the busbar isolation position of the photovoltaic cell string before or after the photovoltaic cell string is positioned by the photovoltaic cell string positioning mechanism. In some preferred embodiments, the battery string transfer belt transmission mechanism 108 is provided, and the battery string transfer belt transmission mechanism is used to transfer and transport the photovoltaic cell string after one battery string end is welded by the welding mechanism to the welding station of the other battery string end of the photovoltaic cell string; when the spacer attachment occurs after the welding mechanism welds the contact position, the spacer attaching station is arranged on the battery string transfer belt transmission mechanism, and the spacer attaching mechanism attaches the spacer to the busbar isolation position of the photovoltaic cell string located on the battery string transfer belt transmission mechanism.In some preferred embodiments, a second welding mechanism for welding a bus bar to the other battery end of the photovoltaic cell string is provided after welding one end of the photovoltaic cell string; before or after the second welding mechanism welds the bus bar to the other battery end, at the spacer attaching station, the spacer is attached to the bus bar isolation position of the photovoltaic cell string by the spacer attaching mechanism.

[0033] It should be noted that attaching the spacer to the bus bar isolation position on the surface of the photovoltaic cell string can prevent the bus bar from contacting the surface of the photovoltaic cell string and causing a short circuit. Additionally, since the photovoltaic cell string is fragile, the spacer can act as a buffer between the surface of the photovoltaic cell string and the bus bar, protecting the photovoltaic cell string. Furthermore, according to the actual situation, when the spacer is attached to the bus bar isolation positions on the surfaces of adjacent different photovoltaic cell strings, it can also limit the adjacent different photovoltaic cell strings and prevent the positions of different photovoltaic cell strings from deviating. In some preferred embodiments, the spacer attaching mechanism 107 includes a spacer feeding and shearing mechanism 1070 and a spacer sucking and attaching mechanism 1071; the spacer feeding and shearing mechanism 1070 is located on one side of the spacer sucking and attaching mechanism 1071 and is used to provide the spacer and shear it to obtain the required length of the spacer, and the spacer sucking and attaching mechanism 1071 sucks the sheared spacer and attaches it to the bus bar isolation position on the surface of the photovoltaic cell string.

[0034] Embodiment Two

[0035] See Figures 1-9, in the first embodiment, the photovoltaic cell string can be transported to the welding station through the photovoltaic cell string loading and transporting mechanism 103. The preset-length busbar can be formed by shearing through the busbar supply device 101, and can be clamped and transported by the busbar clamping and loading mechanism 100, or adsorbed and transported by the busbar adsorption mechanism. It can be controlled that after the end of the cell string of the photovoltaic cell string contacts the preset-length busbar, they are then transported to the welding station together, or the photovoltaic cell string and the preset-length busbar can be transported separately to the welding station, and after the end of the cell string of the photovoltaic cell string contacts the preset-length busbar, welding is performed. In some preferred embodiments, the preset-length busbar formed by shearing the busbar by the busbar supply device is clamped by the busbar clamping and loading mechanism and transported to the busbar loading side of the welding platform; the photovoltaic cell string is transported to the photovoltaic cell string loading side of the welding platform through the photovoltaic cell string loading and transporting mechanism; it is controlled that the busbar on the busbar loading side contacts the end of the cell string of the photovoltaic cell string on the photovoltaic cell string loading side, and the contact position is welded by the welding mechanism. It should be noted that in this embodiment, the preset-length busbar formed by shearing the busbar by the busbar supply device 101 is clamped by the busbar clamping and loading mechanism 100 and transported to the busbar loading side of the welding platform 102. The photovoltaic cell string is transported to the photovoltaic cell string loading side of the welding platform 102 through the photovoltaic cell string loading and transporting mechanism 103. It is controlled that the busbar on the busbar loading side contacts the end of the cell string of the photovoltaic cell string on the photovoltaic cell string loading side, and the contact position is welded by the welding mechanism 104, thereby improving the welding quality of the busbar and the end of the cell string. The preset-length busbar formed by shearing the busbar by the busbar supply device 101 is clamped by the busbar clamping and loading mechanism 100 and transported to the busbar loading side of the welding platform 102. It should be noted that the welding platform 102 can be integrally provided with the photovoltaic cell string loading and transporting mechanism 103, or can be separately provided from the photovoltaic cell string loading and transporting mechanism 103. At the same time, the photovoltaic cell string loading and transporting mechanism 103 includes, but is not limited to, the photovoltaic cell string loading and transporting mechanism 103 in the form of a conveyor belt. Exemplarily, when using the photovoltaic cell string loading and transporting mechanism 103 in the form of a conveyor belt to transport the photovoltaic cell string, the welding platform 102 can be provided at one end of the photovoltaic cell string loading and transporting mechanism 103 in the form of a conveyor belt, and the specific setting method can be integral or separate. Preferably, the welding platform 102 is provided at one end of the photovoltaic cell string loading and transporting mechanism 103 in the form of a conveyor belt, and the specific setting method is a separate form.Preferably, the welding platform 102 can be a liftable welding platform 102 with a lifting function. When using the photovoltaic cell string loading and conveying mechanism 103 in the form of a conveyor belt to convey the photovoltaic cell string, the liftable welding platform 102 rises to one end of the photovoltaic cell string loading and conveying mechanism 103 in the form of a conveyor belt and is higher than the conveyor belt where the photovoltaic cell string is located. The photovoltaic cell string is conveyed to one side of the liftable welding platform 102 and collides with the liftable welding platform 102 for alignment, so as to avoid the position deviation of the photovoltaic cell string and reduce the welding quality. It should also be noted that the bus bar supply device 101 can directly cut the bus bar with a preset length according to the required length of the bus bar. It can also shape and cut the bus bar according to the required length and shape of the bus bar, so as to supply the bus bar with a specific shape. For example, supply an L-shaped bus bar. In some preferred embodiments, the bus bar supply device 101 includes a bending and shaping mechanism 1010, a pressing and shaping mechanism 1011, and a shearing mechanism 1012. The pressing and shaping mechanism 1011 is arranged between the bending and shaping mechanism 1010 and the shearing mechanism 1012. The bus bar is bent and shaped by the bending and shaping mechanism 1010 to obtain a bus bar with a bent part. The bus bar with the bent part is conveyed to one side of the pressing and shaping mechanism 1011 to be pressed by the pressing and shaping mechanism 1011, so that the bent part on the bus bar is fixed. The bus bar after the bent part is fixed is cut by the shearing mechanism 1012 to obtain a bus bar with a specific shape. It can be understood that the number of bus bar supply devices 101 can be one or more. When there are multiple bus bar supply devices 101, multiple bus bar supply devices 101 can supply bus bars to a bus bar clamping and loading mechanism 100 simultaneously or successively, or multiple bus bar supply devices 101 can supply bus bars to multiple bus bar clamping and loading mechanisms 100 simultaneously or successively.

[0036] It should also be noted that when the photovoltaic cell string is transported to the photovoltaic cell string loading side of the welding platform 102 through the photovoltaic cell string loading and conveying mechanism 103, the photovoltaic cell string loading and conveying mechanism 103 includes, but is not limited to, the photovoltaic cell string loading and conveying mechanism 103 in the form of a conveyor belt. When selecting the photovoltaic cell string loading and conveying mechanism 103 in the form of a conveyor belt, the required conveying capacity can be set, and different numbers of photovoltaic cell strings can be conveyed through a suitable conveying width.

[0037] It should also be noted that when the bus bar on the feeding side of the bus bar is in contact with the battery string end of the photovoltaic cell string on the feeding side of the photovoltaic cell string, and the contact position is welded by the welding mechanism 104, there are various ways for the bus bar to contact the battery string end. For example, the bus bar is stationary, and the photovoltaic cell string feeding and transporting mechanism 103 transports the photovoltaic cell string so that the battery string end contacts the bus bar. Or, the photovoltaic cell string is stationary, and the bus bar clamping and feeding mechanism 100 clamps the bus bar and transports it to contact the battery string end of the photovoltaic cell string. Or, the photovoltaic cell string feeding and transporting mechanism 103 transports the photovoltaic cell string, and the bus bar clamping and feeding mechanism 100 clamps the bus bar, so that the photovoltaic cell string and the bus bar move towards each other to achieve the contact between the bus bar and the battery string end of the photovoltaic cell string. It should also be noted that there are also various choices for the contact part between the bus bar and the battery string end. For example, when the bus bar contacts the battery string end, the bus bar contacts the battery string end on the upper side of the battery string end. Or, the bus bar contacts the battery string end on the lower side of the battery string end. After the bus bar contacts the battery string end, the tabletop of the welding platform 102 is located below the battery string end to support the battery string end and the bus bar, and the welding mechanism 104 welds the battery string end and the bus bar under support.

[0038] It should also be noted that during welding, the bus bar clamping and feeding mechanism 100 can clamp the bus bar and weld it to the end of the battery string. After welding, the bus bar clamping and feeding mechanism 100 releases the clamped bus bar, thereby ensuring good contact between the bus bar and the end of the battery string during welding and improving the welding quality. Further, before the welding platform 102 moves down, the bus bar clamping and feeding mechanism 100 clamps the bus bar after welding is completed. After the welding platform 102 moves down, the bus bar clamping and feeding mechanism 100 releases the clamped bus bar after welding is completed. It should be noted that during the welding process, solder adhesion may occur between the welding platform 102 and the end of the battery string. By releasing the clamped bus bar after welding is completed by the bus bar clamping and feeding mechanism 100 after the welding platform 102 moves down, the pulling force can be avoided from damaging the battery string. It should also be noted that during welding, the end of the battery string and the bus bar can be pressed together by a pressing structure, thereby ensuring good contact between the bus bar and the end of the battery string during welding and improving the welding quality. Among them, the pressing structure can be selected differently according to different welding mechanisms 104. For example, when selecting a welding mechanism 104 that requires contact between the welding head and the welding mechanism 104 for welding, the welding head of the welding head contact type welding mechanism 104 can be used as the pressing structure to press together the end of the battery string and the bus bar. Another example is that when selecting a non-contact welding mechanism 104 such as an infrared lamp for welding, if there is a pressing part on the welding side of the non-contact welding mechanism 104, the pressing part can be used as the pressing structure to press together the end of the battery string and the bus bar. If there is no pressing part on the welding side of the non-contact welding mechanism 104, a pressing structure independent of the welding mechanism 104 can be provided on one side of the end of the battery string and the bus bar to press together the end of the battery string and the bus bar.

[0039] In some preferred embodiments, the photovoltaic cell string feeding and transporting mechanism 103 transports the photovoltaic cell string provided by the photovoltaic cell string feeding mechanism; the photovoltaic cell string feeding mechanism transports the obtained photovoltaic cell string onto the photovoltaic cell string feeding and transporting mechanism 103. It should be noted that the photovoltaic cell string feeding mechanism can adopt a suction cup type photovoltaic cell string feeding suction cup mechanism, or other structured photovoltaic cell string feeding mechanisms. To obtain the reference position before feeding, the photovoltaic cell string feeding mechanism can obtain the positioned photovoltaic cell string from the photovoltaic cell string positioning mechanism 105, or can perform self-positioning after obtaining the photovoltaic cell string. Preferably, the photovoltaic cell string feeding mechanism adopts a suction cup type photovoltaic cell string feeding suction cup mechanism, and the photovoltaic cell string feeding suction cup mechanism sucks the positioned photovoltaic cell string from the photovoltaic cell string positioning mechanism 105 and places it onto the photovoltaic cell string feeding and transporting mechanism 103. The photovoltaic cell string feeding suction cup mechanism is arranged on the suction cup moving track above the photovoltaic cell string positioning mechanism 105 and the photovoltaic cell string feeding and transporting mechanism 103; the photovoltaic cell string feeding suction cup mechanism moves on the suction cup moving track, sucks the positioned photovoltaic cell string from the photovoltaic cell string positioning mechanism 105, and places it onto the photovoltaic cell string feeding and transporting mechanism 103. It should be noted that the number of the photovoltaic cell string feeding suction cup mechanisms can be one or more, and can be appropriately configured according to the production capacity of the welder. It should also be noted that the photovoltaic cell string on the photovoltaic cell string positioning mechanism 105 can be sucked from the feeding area 106 of the photovoltaic cell string by the photovoltaic cell string feeding suction cup mechanism, or can be obtained from the feeding area 106 of the photovoltaic cell string by other photovoltaic cell string feeding mechanisms. Preferably, the photovoltaic cell string feeding suction cup mechanism also moves on the suction cup moving track, sucks the photovoltaic cell string placed in the feeding area from above the feeding area 106 of the photovoltaic cell string, and places it onto the photovoltaic cell string positioning mechanism 105. After the photovoltaic cell string positioning mechanism 105 obtains the photovoltaic cell string from the feeding area, it positions the photovoltaic cell string from the feeding area. Preferably, the feeding area 106 of the photovoltaic cell string, the photovoltaic cell string positioning mechanism 105, and the photovoltaic cell string feeding and transporting mechanism 103 are arranged side by side, and the photovoltaic cell string positioning mechanism 105 is located between the feeding area 106 of the photovoltaic cell string and the photovoltaic cell string feeding and transporting mechanism 103.

[0040] Embodiment III

[0041] See Figures 1-9, on the basis of Embodiments 1 and 2, this embodiment further proposes a method for welding busbars of a solar photovoltaic cell string, and the method includes: setting a plurality of busbar welding station groups, each of the busbar welding station groups including the busbar clamping and loading mechanism 100, the busbar supply device 101, the welding platform 102, and the welding mechanism 104; during the busbar welding process, after one busbar welding station group welds one end of a cell string of the photovoltaic cell string to the busbar, another busbar welding station group welds the other end of the cell string of the photovoltaic cell string to the busbar. It should be noted that different welding station groups in the plurality of busbar welding station groups can work independently and cooperate with each other, greatly improving the welding efficiency.

[0042] In some preferred embodiments, the welding platform 102 includes a first-station welding platform 102, the busbar clamping and loading mechanism 100 includes a first-station busbar clamping and loading mechanism 1000, the busbar supply device 101 includes a first-station busbar supply device 1013, and the first-station busbar supply device 1013 supplies a first-station busbar with a preset length; the battery string end of the photovoltaic cell string includes a first battery string end, and the photovoltaic cell string loading and transporting mechanism 103 transports the photovoltaic cell string including the first battery string end to the photovoltaic cell string loading side of the first-station welding platform 102; the first-station busbar clamping and loading mechanism 1000 clamps the first-station busbar and transports it to the busbar loading side of the first-station welding platform 102; control the first-station busbar on the busbar loading side of the first-station welding platform 102 to contact the first battery string end on the photovoltaic cell string loading side of the first-station welding platform 102, and weld the contact position through the welding mechanism 104. Further, the welding platform 102 further includes a second-station welding platform 102, and the busbar clamping and loading mechanism 100 further includes a second-station busbar clamping and loading mechanism 1001; the busbar supply device 101 further includes a second-station busbar supply device 101, and the second-station busbar supply device 101 supplies a second-station busbar with a preset length; the second-station busbar clamping and loading mechanism 1001 clamps the second-station busbar and transports it to the busbar loading side of the second-station welding platform 102; the battery string end of the photovoltaic cell string includes a second battery string end; the photovoltaic cell string after the first-station busbar is welded to the first battery string end is transmitted to the battery string transfer belt transmission mechanism 108 through the photovoltaic cell string loading and transporting mechanism 103, and is transported to the photovoltaic cell string loading side of the second-station welding platform 102 through the battery string transfer belt transmission mechanism 108; control the second-station busbar on the busbar loading side of the second-station welding platform 102 to contact the second battery string end on the photovoltaic cell string loading side of the second-station welding platform 102, and weld the contact position through the welding mechanism 104. It should be noted that the battery string transfer belt transmission mechanism 108 includes, but is not limited to, a battery string transfer belt transmission mechanism 108 in the form of a conveyor belt. When selecting a battery string transfer belt transmission mechanism 108 in the form of a conveyor belt and a photovoltaic cell string loading and transporting mechanism 103 in the form of a conveyor belt, the battery string transfer belt transmission mechanism 108 in the form of a conveyor belt and the photovoltaic cell string loading and transporting mechanism 103 in the form of a conveyor belt can be arranged on the same straight line to improve the transmission and transfer efficiency.Further, after the second-station bus bar is welded to the second battery string end, a welded photovoltaic battery string is obtained; the welded photovoltaic battery string is sucked by a photovoltaic battery string blanking suction cup mechanism arranged above the tray positioning transmission blanking mechanism 109 and the battery string transfer belt transmission mechanism 108, and placed on the tray positioned on the tray positioning transmission blanking mechanism 109, and then transmitted and blanked through the tray positioning transmission blanking mechanism 109. Further, the tray positioned on the tray positioning transmission blanking mechanism 109 is transmitted and provided by a tray feeding mechanism 110 on one side thereof.

[0043] In some preferred embodiments, the first-station bus bar clamping and loading mechanism 1000 includes a first bus bar clamping and loading mechanism 10000 and a second bus bar clamping and loading mechanism 10001; the first-station bus bar supply device 1013 includes a first bus bar supply device 10130 and a second bus bar supply device 10131; the first bus bar clamping and loading mechanism 10000 and the first bus bar supply device 10130 form a first bus bar loading unit, and the second bus bar clamping and loading mechanism 10001 and the second bus bar supply device 10131 form a second bus bar loading unit; the first bus bar loading unit and the second bus bar loading unit are mirror-symmetrically arranged on both sides of the first-station welding platform 102 with the first-station welding platform 102 as the center. It should be noted that the first bus bar loading unit and the second bus bar loading unit are mirror-symmetrically arranged on both sides of the first-station welding platform 102 with the first-station welding platform 102 as the center, and can supply bus bars to the first-station welding platform 102 simultaneously or separately. It can be understood that the number of bus bar loading units is not limited to the first and second bus bar loading units, and different numbers of bus bar loading units can be configured according to actual situations. Moreover, in different bus bar loading units, only one bus bar loading unit can supply bus bars alone, or multiple bus bar loading units can supply bus bars simultaneously.

[0044] Embodiment 4

[0045] See Figures 1-9, on the basis of Embodiments 1, 2, and 3, this embodiment further proposes a method for welding busbars of a solar photovoltaic cell string. The method includes: after the cell string end of the photovoltaic cell string is welded to the busbar to be welded, the photovoltaic cell string assembly 112 is obtained and output from the blanking station of the cell string assembly. The photovoltaic cell string assembly 112 from the blanking station of the cell string assembly is connected and fixed to the backsheet through the first curing layer. Further, the photovoltaic cell string assembly 112 after being connected to the backsheet is detected. After passing the detection, the upper side of the photovoltaic cell string assembly 112 from the blanking station of the cell string assembly is connected and fixed to the transparent protective layer through the second curing layer; the backsheet is connected to the junction box, and the transparent protective layer is sleeved on the frame to obtain a solar photovoltaic cell string product. It should be noted that both the first curing layer and the second curing layer can be EVA encapsulation films. Before being connected and fixed through the second curing layer, the EVA encapsulation film can be heated by the heating device 111. The transparent protective layer can be tempered glass, and the frame sleeved by the transparent protective layer can be made of silicone. It can be understood that a heating device 111 can be set at the blanking station of the cell string assembly for heating and curing. In the method for welding busbars of a solar photovoltaic cell string, a detection device can also be set at a suitable process for detection according to actual needs. For example, the detection device can perform cell string detection between the cell string loading area and the positioning area, or can also perform detection during the discharging process after the busbars are welded at both ends to form a cell string assembly, or can also perform detection before or after the heating device 111 heats.

[0046] Embodiment 5

[0047] See Figures 1-9 , on the basis of Embodiments 1, 2, 3, and 4, this embodiment provides a busbar welding machine for a solar photovoltaic cell string. The busbar welding machine for a solar photovoltaic cell string welds the busbars of a solar photovoltaic cell string by using the method for welding busbars of a solar photovoltaic cell string described in any of the above embodiments.

[0048] The above embodiments are only preferred specific implementation manners of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. The protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A busbar welding method for a solar photovoltaic cell string, characterized in that: include: Controlling the cell string end of the photovoltaic cell string to contact with a busbar of preset length, and welding the contact position by a welding mechanism; At the isolating member attaching station, attaching the isolating member to the busbar isolating position of the photovoltaic cell string by an isolating member attaching mechanism; When the isolation piece is attached before the welding mechanism welds the contact position, the isolation piece attachment station is set on the photovoltaic cell string positioning mechanism, and the photovoltaic cell string positioning mechanism positions the photovoltaic cell string that needs to be transported to the welding station; the isolation piece attachment mechanism attaches the isolation piece to the bus bar isolation position of the photovoltaic cell string before or after the photovoltaic cell string positioning mechanism is positioned.

2. The busbar welding method of a solar photovoltaic cell string as claimed in claim 1, characterized in that: Controlling the contact between the cell string end of the photovoltaic cell string and the preset length busbar, and welding the contact position by a welding mechanism, including: The photovoltaic cell string and the busbar of preset length formed by cutting are transported to a welding station, wherein the photovoltaic cell string includes a busbar isolation position, the cell string end of the photovoltaic cell string is controlled to contact with the busbar of preset length, and the contact position is welded by a welding mechanism; Alternatively, the cell string end of the photovoltaic cell string is controlled to contact with the busbar of preset length formed by shearing, and the contacted cell string end of the photovoltaic cell string and the busbar of preset length are transported to a welding station, and the contact position is welded by a welding mechanism.

3. The busbar welding method of a solar photovoltaic cell string as claimed in claim 2, characterized in that: Transporting photovoltaic cell strings and busbars cut to preset lengths to the welding station, including: A welding platform is provided at the welding station, and the photovoltaic cell string is transported to the photovoltaic cell string loading side of the welding platform; The busbar of preset length formed by shearing is transported to the busbar loading side of the welding platform.

4. A busbar welding machine for a solar photovoltaic cell string, characterized in that: The busbar welding machine for the solar photovoltaic cell string uses the busbar welding method for the solar photovoltaic cell string as described in any one of claims 1 to 3 to weld the busbars of the solar photovoltaic cell string.

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