Busbar welding method and welding machine for solar photovoltaic cell strings

Abstract

This invention relates to the technical fields of manufacturing solar photovoltaic cell string welding equipment, manufacturing components for photovoltaic equipment, and manufacturing electrical component assemblies. It provides a method and machine for welding busbars of solar photovoltaic cell strings. The method involves a busbar clamping and feeding mechanism that clamps busbars of a preset length cut by a busbar supply device and transports them to the busbar feeding side of a busbar welding platform. A photovoltaic cell string feeding and transmission mechanism then transports the photovoltaic cell string to the photovoltaic cell string feeding side of the busbar welding platform. The method controls the contact between the busbar on the busbar feeding side and the end of the photovoltaic cell string on the photovoltaic cell string feeding side. A welding mechanism then welds the contact points, thereby improving the welding quality of the busbar-to-cell string end welding.

Description

Technical Field

[0001] This invention relates to the technical fields of manufacturing solar photovoltaic cell string welding equipment, manufacturing components of photovoltaic equipment, and manufacturing electrical component assemblies, and particularly to a method for welding busbars of solar photovoltaic cell strings and a welding machine for welding busbars of solar photovoltaic cell strings. Background Technology

[0002] In the production process of solar photovoltaic (PV) cell strings, busbars need to be transported to the welding station and welded to the ends of the PV cell strings. In existing technologies, the transport of busbars mainly involves: using a suction cup mechanism to hold the upper side of the busbar, then transporting the held busbar to the welding station to overlap it with the upper side of the cell string ends, and finally welding the overlapped busbars to the cell string ends using a welding mechanism. During the overlapping process, the suction cup mechanism needs to release the negative pressure suction force. Due to the disappearance of the negative pressure suction force and the falling of the busbar, the busbar is prone to shifting at the cell string ends at the moment of overlap, reducing the welding quality.

[0003] In summary, existing busbar welding technologies for solar photovoltaic cell strings have technical problems such as the busbars being prone to misalignment at the ends of the cell strings, resulting in reduced welding quality. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides a method and machine for welding busbars of a solar photovoltaic cell string, thereby improving the welding quality of the busbars and the ends of the cell string.

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

[0006] The busbar clamping and feeding mechanism clamps the busbar supply device to cut the busbars to a preset length, and transports them to the busbar feeding side of the busbar welding platform;

[0007] The photovoltaic cell strings are transported to the photovoltaic cell string loading side of the busbar welding platform via a photovoltaic cell string loading and conveying mechanism.

[0008] The busbar on the feeding side of the busbar is controlled to contact the end of the photovoltaic cell string on the feeding side of the photovoltaic cell string, and the contact position is welded by a welding mechanism.

[0009] Furthermore, the insulating paper is attached to the busbar isolation position on the surface of the photovoltaic cell string using the insulating paper attachment mechanism.

[0010] Furthermore, the busbar welding method for solar photovoltaic cell strings also includes: setting up multiple busbar welding station groups, each of the busbar welding station groups including the busbar clamping and feeding mechanism, the busbar supply device, the busbar welding platform, and the welding mechanism; during the busbar welding process, after one of the busbar welding station groups welds one end of the photovoltaic cell string to the busbar, another busbar welding station group welds the other end of the photovoltaic cell string to the busbar.

[0011] Secondly, the present invention provides a busbar welding machine for solar photovoltaic cell strings, wherein the busbar welding machine applies the above-mentioned busbar welding method for solar photovoltaic cell strings to weld the busbars of the solar photovoltaic cell strings.

[0012] Compared with the prior art, the beneficial effects of this invention are as follows:

[0013] This invention provides a method and machine for welding busbars in a solar photovoltaic (PV) cell string. A busbar clamping and feeding mechanism clamps busbars of a preset length cut by a busbar supply device and transports them to the busbar feeding side of a busbar welding platform. A PV cell string feeding and transfer mechanism then transports the PV cell string to the PV cell string feeding side of the same platform. The method controls the contact between the busbars on the feeding side and the ends of the PV cell strings on the feeding side. A welding mechanism then welds the contact points, thereby improving the welding quality between the busbars and the PV cell string ends. Furthermore, a release liner attachment mechanism attaches release liner to the busbar isolation positions on the PV cell string surface, protecting the PV cell string and preventing short circuits caused by the busbars contacting the PV cell string surface. Additionally, multiple busbar welding stations operate independently yet cooperate with each other, significantly improving welding efficiency. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. Some specific embodiments of the invention will be described in detail below with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings designate the same or similar parts or components. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0015] Figure 1 This is a schematic flowchart of a busbar welding method for a solar photovoltaic cell string according to an embodiment of the present invention;

[0016] Figure 2This is a schematic diagram of a busbar clamping and feeding mechanism located on the feeding side of the busbar welding platform according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of a busbar welding machine for solar photovoltaic cell strings according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of a two-station busbar clamping and feeding mechanism for a busbar welding machine for solar photovoltaic cell strings, as described in an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of a structure in which the first station busbar clamping and feeding mechanism and the first station busbar supply device are arranged in a mirror image according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of a structure of the release paper feeding and shearing mechanism according to an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of a busbar clamping and feeding mechanism according to an embodiment of the present invention, showing how the busbar clamping and feeding mechanism accurately clamps and shapes the busbar after cutting and shaping on one side of the busbar supply device;

[0022] Figure 8 This is a schematic diagram of the structure of the material tray on the material tray feeding mechanism according to an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of a photovoltaic cell string assembly on a material tray in an embodiment of the present invention, on a material tray positioning and conveying feeding mechanism.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Busbar clamping and feeding mechanism; 1000. First station busbar clamping and feeding mechanism; 10000. First busbar clamping and feeding mechanism; 10001. Second busbar clamping and feeding mechanism; 1001. Second station busbar clamping and feeding mechanism;

[0026] 101. Busbar supply device; 1010. Bending and shaping mechanism; 1011. Pressing and shaping mechanism; 1012. Shearing mechanism; 1013. First station busbar supply device; 10130. First busbar supply device; 10131. Second busbar supply device;

[0027] 102. Busbar welding platform; 103. Photovoltaic cell string feeding and conveying mechanism; 104. Welding mechanism; 105. Photovoltaic cell string positioning mechanism; 106. Photovoltaic cell string feeding area; 107. Release paper attaching mechanism; 1070. Release paper feeding and cutting mechanism; 1071. Release paper suction and attaching mechanism; 108. Cell string transfer and conveying mechanism; 109. Material tray positioning and conveying unloading mechanism; 110. Material tray feeding mechanism; 111. Heating device; 112. Photovoltaic cell string assembly. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] Example 1

[0030] See Figures 1-9 This embodiment provides a method for welding busbars of a solar photovoltaic cell string, including the following steps:

[0031] S1. The busbars of a preset length, formed by the cutting of the busbars by the busbar clamping and feeding mechanism, are clamped and transported to the busbar feeding side of the busbar welding platform.

[0032] S3. The photovoltaic cell string is transported to the photovoltaic cell string loading side of the busbar welding platform through the photovoltaic cell string loading and conveying mechanism;

[0033] S5. Control the busbar on the busbar feeding side to contact the end of the photovoltaic cell string on the photovoltaic cell string feeding side, and weld the contact position through a welding mechanism.

[0034] It should be noted that the step numbers are not used to indicate or imply the order of different steps, but are for the convenience of explaining the steps. For example, the busbar welding method for solar photovoltaic cell strings can be performed by first implementing step S1 and then step S3, or by first implementing step S3 and then step S1. In this embodiment, the busbar clamping and feeding mechanism 100 clamps the busbars of a preset length formed by the busbar supply device 101 cutting the busbars, and transports them to the busbar feeding side of the busbar welding platform 102. The photovoltaic cell string feeding and transmission mechanism 103 transports the photovoltaic cell string to the photovoltaic cell string feeding side of the busbar welding platform 102. The busbars on the busbar feeding side are controlled to contact the cell string ends of the photovoltaic cell string on the photovoltaic cell string feeding side. The welding mechanism 104 welds the contact position, thereby improving the welding quality of the busbar and cell string end welding.

[0035] In step S1, the busbar clamping and feeding mechanism 100 clamps the busbar supply device 101 to cut the busbar to a preset length, and transports it to the busbar feeding side of the busbar welding platform 102.

[0036] It should be noted that the busbar welding platform 102 can be integrally installed with the photovoltaic cell string loading and conveying mechanism 103, or it can be installed separately from the photovoltaic cell string loading and conveying mechanism 103. Meanwhile, the photovoltaic cell string loading and conveying mechanism 103 includes, but is not limited to, a conveyor belt-type photovoltaic cell string loading and conveying mechanism 103. For example, when using a conveyor belt-type photovoltaic cell string loading and conveying mechanism 103 to transport photovoltaic cell strings, the busbar welding platform 102 can be installed at one end of the conveyor belt-type photovoltaic cell string loading and conveying mechanism 103; the specific installation method can be integral or separate. Preferably, the busbar welding platform 102 is installed at one end of the conveyor belt-type photovoltaic cell string loading and conveying mechanism 103, specifically in a separate installation method. Preferably, the busbar welding platform 102 can be a liftable busbar welding platform 102 with lifting function. When the photovoltaic cell string is transported by the photovoltaic cell string feeding and conveying mechanism 103 in the form of a conveyor belt, the liftable busbar welding platform 102 rises to one end of the photovoltaic cell string feeding 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 transported to one side of the liftable busbar welding platform 102 and collides and aligns with the liftable busbar welding platform 102 to avoid the position of the photovoltaic cell string being offset and reducing the welding quality.

[0037] It should also be noted that the busbar supply device 101 can directly cut a busbar of a preset length according to the required busbar length. Alternatively, it can shape and cut the busbar according to the required length and shape to supply a busbar with a specific shape. For example, it can supply an L-shaped busbar. In some preferred embodiments, the busbar supply device 101 includes a bending and shaping mechanism 1010, a pressing and shaping mechanism 1011, and a cutting mechanism 1012. The pressing and shaping mechanism 1011 is disposed between the bending and shaping mechanism 1010 and the cutting mechanism 1012. The busbar is bent and shaped by the bending and shaping mechanism 1010 to obtain a busbar with a bent portion. The busbar with the bent portion is conveyed to the pressing and shaping mechanism 1011 to be pressed, thus shaping the bent portion on the busbar. After the bent portion is shaped, the busbar is cut by the cutting mechanism 1012 to obtain a busbar with a specific shape. It is understood that the number of busbar supply devices 101 can be one or more. When there are multiple busbar supply devices 101, multiple busbar supply devices 101 can supply busbars to one busbar clamping and feeding mechanism 100 simultaneously or sequentially, or multiple busbar supply devices 101 can supply busbars to multiple busbar clamping and feeding mechanisms 100 simultaneously or sequentially.

[0038] In step S3, the photovoltaic cell strings are transported to the photovoltaic cell string loading side of the busbar welding platform 102 via the photovoltaic cell string loading and conveying mechanism 103. It should be noted that the photovoltaic cell string loading and conveying mechanism 103 includes, but is not limited to, a conveyor belt-type photovoltaic cell string loading and conveying mechanism 103. When selecting a conveyor belt-type photovoltaic cell string loading and conveying mechanism 103, the required conveying capacity can be set, and different numbers of photovoltaic cell strings can be conveyed using a suitable conveying width.

[0039] In step S5, the busbar on the busbar feeding side is controlled to contact the end of the photovoltaic cell string on the photovoltaic cell string feeding side, and the contact position is welded by the welding mechanism 104.

[0040] It should be noted that there are multiple ways in which the busbar contacts the end of the battery string. For example, the busbar is stationary, and the photovoltaic battery string feeding and conveying mechanism 103 conveys the photovoltaic battery string so that the end of the battery string contacts the busbar. Alternatively, the photovoltaic battery string is stationary, and the busbar clamping and feeding mechanism 100 clamps the busbar and transports it to contact the end of the photovoltaic battery string. Alternatively, the photovoltaic battery string feeding and conveying mechanism 103 conveys the photovoltaic battery string, and the busbar clamping and feeding mechanism 100 clamps the busbar, causing the photovoltaic battery string and the busbar to move towards each other, thus achieving contact between the busbar and the end of the photovoltaic battery string. It should also be noted that there are multiple options for the contact point between the busbar and the end of the battery string. For example, when the busbar contacts the end of the battery string, the busbar contacts the end of the battery string on the upper side. Alternatively, the busbar contacts the end of the battery string on the lower side. After the busbar contacts the end of the battery string, the platform of the busbar welding platform 102 is located below the end of the battery string, supporting the end of the battery string and the busbar. The welding mechanism 104 welds the end of the battery string and the busbar under the support.

[0041] It should also be noted that during welding, the busbar clamping and feeding mechanism 100 can clamp the busbar to the battery string end for welding. After welding, the busbar clamping and feeding mechanism 100 releases the clamped busbar, thereby ensuring good contact between the busbar and the battery string end during welding and improving welding quality. Furthermore, before the welding platform 102 moves down, the busbar clamping and feeding mechanism 100 clamps the welded busbar. After the welding platform 102 moves down, the busbar clamping and feeding mechanism 100 releases the clamped busbar. It should be noted that during welding, solder may adhere between the busbar welding platform 102 and the battery string end. By releasing the clamped busbar after the welding platform 102 moves down, the pulling force can be prevented from damaging the battery string. It should also be noted that during welding, a pressing structure can be used to press the battery string ends and the busbar together, thereby ensuring good contact between the busbar and the battery string ends during welding and improving welding quality. The pressing structure can be selected differently depending on the welding mechanism 104 chosen. For example, when using a welding head contact welding mechanism 104 that requires contact between the welding head and the welding mechanism 104, the welding head of the welding head contact welding mechanism 104 can be used as a pressing structure to press the battery string ends and the busbar together. Alternatively, when using a non-contact welding mechanism 104 such as an infrared lamp, if a pressing element is provided on the welding side of the non-contact welding mechanism 104, the pressing element can be used as a pressing structure to press the battery string ends and the busbar together. If the welding side of the non-contact welding mechanism 104 does not have a pressing element, a pressing structure independent of the welding mechanism 104 can be provided on one side of the battery string ends and the busbar to press the battery string ends and the busbar together.

[0042] In some preferred embodiments, the photovoltaic strings transported by the photovoltaic string loading and conveying mechanism 103 are provided by a photovoltaic string loading mechanism; the photovoltaic string loading mechanism transports the acquired photovoltaic strings onto the photovoltaic string loading and conveying mechanism 103. It should be noted that the photovoltaic string loading mechanism can be a suction cup type photovoltaic string loading suction cup mechanism, or it can be a photovoltaic string loading mechanism with other structures. To obtain the reference position before loading, the photovoltaic string loading mechanism can obtain the positioned photovoltaic strings from the photovoltaic string positioning mechanism 105, or it can position itself after obtaining the photovoltaic strings. Preferably, the photovoltaic string loading mechanism is a suction cup type photovoltaic string loading suction cup mechanism, which picks up the positioned photovoltaic strings from the photovoltaic string positioning mechanism 105 and places them onto the photovoltaic string loading and conveying mechanism 103. The photovoltaic (PV) cell string loading suction cup mechanism is mounted on a suction cup moving track above the PV cell string positioning mechanism 105 and the PV cell string loading and conveying mechanism 103. The PV cell string loading suction cup mechanism moves along the suction cup moving track, picking up the positioned PV cell string from the PV cell string positioning mechanism 105 and placing it onto the PV cell string loading and conveying mechanism 103. It should be noted that the number of PV cell string loading suction cup mechanisms can be one or more, and the specific configuration can be appropriately determined based on the welding machine's production capacity. It should also be noted that the PV cell strings on the PV cell string positioning mechanism 105 can be picked up from the PV cell string loading area 106 by the PV cell string loading suction cup mechanism, or they can be obtained from the PV cell string loading area 106 by other PV cell string loading mechanisms. Preferably, the photovoltaic cell string feeding suction cup mechanism also moves on the suction cup moving track, picking up the photovoltaic cell strings placed in the feeding area 106 from above and placing them on the photovoltaic cell string positioning mechanism 105. After receiving the photovoltaic cell strings from the feeding area, the photovoltaic cell string positioning mechanism 105 positions the photovoltaic cell strings from the feeding area. Preferably, the photovoltaic cell string feeding area 106, the photovoltaic cell string positioning mechanism 105, and the photovoltaic cell string feeding and conveying mechanism 103 are arranged side by side, with the photovoltaic cell string positioning mechanism 105 located between the photovoltaic cell string feeding area 106 and the photovoltaic cell string feeding and conveying mechanism 103.

[0043] Example 2

[0044] See Figures 1-9Based on Embodiment 1, this embodiment further proposes a method for welding busbars of a solar photovoltaic cell string. This method includes attaching insulating paper to the busbar isolation positions on the surface of the photovoltaic cell string using an insulating paper attaching mechanism 107. It should be noted that attaching the insulating paper to the busbar isolation positions on the surface of the photovoltaic cell string can prevent the busbar from contacting the photovoltaic cell string surface and causing a short circuit. Additionally, since photovoltaic cell strings are fragile, the insulating paper acts as a buffer between the photovoltaic cell string surface and the busbar, protecting the photovoltaic cell string. Furthermore, depending on the actual situation, when the insulating paper is attached to the busbar isolation positions on the surfaces of adjacent photovoltaic cell strings, it can also limit the position of adjacent photovoltaic cell strings, preventing positional deviation between different photovoltaic cell strings. In some preferred embodiments, the release liner attachment mechanism 107 includes a release liner feeding and cutting mechanism 1070 and a release liner suction and attachment mechanism 1071; the release liner feeding and cutting mechanism 1070 is located on one side of the release liner suction and attachment mechanism 1071, and is used to provide release liner and cut it to the required length; the release liner suction and attachment mechanism 1071 suctions the cut release liner and attaches it to the busbar isolation position on the surface of the photovoltaic cell string.

[0045] Example 3

[0046] See Figures 1-9 Based on Embodiments 1 and 2, this embodiment further proposes a method for welding busbars of a solar photovoltaic cell string. The method includes: setting up multiple busbar welding station groups, each of which includes a busbar clamping and feeding mechanism 100, a busbar supply device 101, a busbar welding platform 102, and a welding mechanism 104. During the busbar welding process, one busbar welding station group welds one end of the photovoltaic cell string to the busbar, and another busbar welding station group welds the other end of the photovoltaic cell string to the busbar. It should be noted that different welding station groups within the multiple busbar welding station groups can work independently and cooperate with each other, greatly improving welding efficiency.

[0047] In some preferred embodiments, the busbar welding platform 102 includes a first-station busbar welding platform 102, the busbar clamping and feeding mechanism 100 includes a first-station busbar clamping and feeding mechanism 1000, the busbar supply device 101 includes a first-station busbar supply device 1013, the first-station busbar supply device 1013 supplies first-station busbars with a preset length; the photovoltaic cell string's cell string end includes a first cell string end, and the photovoltaic cell string feeding and conveying mechanism 103 includes the first cell string... The photovoltaic cell string at the end is transported to the photovoltaic cell string loading side of the first station busbar 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 busbar welding platform 102; the first station busbar on the busbar loading side of the first station busbar welding platform 102 is controlled to contact the end of the first cell string on the photovoltaic cell string loading side of the first station busbar welding platform 102, and the welding mechanism 104 welds the contact position. Furthermore, the busbar welding platform 102 also includes a second-station busbar welding platform 102, and the busbar clamping and feeding mechanism 100 further includes a second-station busbar clamping and feeding mechanism 1001; the busbar supply device 101 further includes a second-station busbar supply device 101, which supplies second-station busbars of a preset length; the second-station busbar clamping and feeding mechanism 1001 clamps the second-station busbar and transports it to the busbar feeding side of the second-station busbar welding platform 102; the battery string end of the photovoltaic cell string includes a second battery. The photovoltaic cell string, after being welded to the first terminal of the first battery string, is transported to the battery string transfer mechanism 108 via the photovoltaic cell string loading and transfer mechanism 103, and then transported to the photovoltaic cell string loading side of the second terminal busbar welding platform 102 via the battery string transfer mechanism 108. The second terminal busbar on the loading side of the second terminal busbar welding platform 102 is controlled to contact the second battery string end on the photovoltaic cell string loading side of the second terminal busbar welding platform 102, and welding is performed at the contact position via the welding mechanism 104. It should be noted that the battery string transfer mechanism 108 includes, but is not limited to, a conveyor belt-type battery string transfer mechanism 108. When selecting both the conveyor belt-type battery string transfer mechanism 108 and the conveyor belt-type photovoltaic cell string loading transfer mechanism 103, the conveyor belt-type battery string transfer mechanism 108 and the belt-feeding photovoltaic cell string loading transfer mechanism 103 can be set on the same straight line to improve the transfer efficiency.Furthermore, after the second station busbar is welded to the end of the second battery string, a welded photovoltaic battery string is obtained. The welded photovoltaic battery string is picked up by a photovoltaic battery string unloading suction cup mechanism located above the material tray positioning and conveying unloading mechanism 109 and the battery string transfer and conveying mechanism 108, and placed onto the material tray positioned on the material tray positioning and conveying unloading mechanism 109, and then conveyed and unloaded by the material tray positioning and conveying unloading mechanism 109. Furthermore, the material tray positioned on the material tray positioning and conveying unloading mechanism 109 is provided by a material tray feeding mechanism 110 on one side of it.

[0048] In some preferred embodiments, the first station busbar clamping and feeding mechanism 1000 includes a first busbar clamping and feeding mechanism 10000 and a second busbar clamping and feeding mechanism 10001; the first station busbar supply device 1013 includes a first busbar supply device 10130 and a second busbar supply device 10131; the first busbar clamping and feeding mechanism 10000 and the first busbar supply device 10130 constitute a first busbar feeding unit, and the second busbar clamping and feeding mechanism 10001 and the second busbar supply device 10131 constitute a second busbar feeding unit; the first busbar feeding unit and the second busbar feeding unit are mirror images of the first station busbar welding platform 102, with the first station busbar welding platform 102 as the center, on both sides of the first station busbar welding platform 102. It should be noted that the first busbar feeding unit and the second busbar feeding unit are mirror images of the first station busbar welding platform 102, centered on it, and can simultaneously or individually supply busbars to the first station busbar welding platform 102. It is understood that the number of busbar feeding units is not limited to the first and second busbar feeding units; different numbers of busbar feeding units can be configured according to actual conditions. Furthermore, among different busbar feeding units, only one busbar feeding unit can provide busbars independently, or multiple busbar feeding units can provide busbars simultaneously.

[0049] Example 4

[0050] See Figures 1-9Based on embodiments one, two, and three, this embodiment further proposes a busbar welding method for solar photovoltaic cell strings. The method includes: after the cell string ends of the photovoltaic cell string are welded to the busbars to be welded, a photovoltaic cell string assembly 112 is unloaded from the cell string assembly unloading station. A first curing layer connects and fixes the photovoltaic cell string assembly 112 from the unloading station to a backplate. Further, the photovoltaic cell string assembly 112 after backplate connection is inspected. If the inspection passes, a second curing layer connects and fixes the upper side of the photovoltaic cell string assembly 112 from the unloading station to a transparent protective layer. The backplate is then connected to a junction box, and the transparent protective layer is fitted over a frame to obtain the solar photovoltaic cell string product. It should be noted that both the first and second curing layers can be EVA encapsulation film. Before connection and fixation via the second curing layer, the EVA encapsulation film can be heated by a heating device 111. The transparent protective layer can be tempered glass, and the frame fitted over the transparent protective layer can be silicone. It is understood that a heating device 111 can be installed at the battery string assembly unloading station for heating and curing. In the busbar welding method for solar photovoltaic cell strings, an inspection device can also be installed at appropriate stages for inspection, depending on actual needs. For example, the inspection device can perform battery string inspection between the battery string loading area and the positioning area, or it can perform inspection during the unloading process after the busbars at both ends are welded to form the battery string assembly, or it can perform inspection before or after heating by the heating device 111.

[0051] Example 5

[0052] See Figures 1-9 Based on embodiments one, two, three, and four, this embodiment provides a busbar welding machine for solar photovoltaic cell strings. The busbar welding machine for solar photovoltaic cell strings applies the busbar welding method for solar photovoltaic cell strings described in any of the above embodiments to weld the busbars of the solar photovoltaic cell strings.

[0053] The above embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for welding busbars in a solar photovoltaic cell string, characterized in that, include: The busbar clamping and feeding mechanism clamps the busbar supply device to cut the busbars to a preset length, and transports them to the busbar feeding side of the busbar welding platform; The photovoltaic cell strings are transported to the photovoltaic cell string loading side of the busbar welding platform via a photovoltaic cell string loading and conveying mechanism. The busbar on the busbar feeding side is controlled to contact the end of the photovoltaic cell string on the photovoltaic cell string feeding side, and the contact position is welded by a welding mechanism; The insulating paper is attached to the busbar isolation position on the surface of the photovoltaic cell string by the insulating paper attachment mechanism. The insulating paper attachment mechanism includes an insulating paper feeding and cutting mechanism and an insulating paper suction and attachment mechanism. The insulating paper feeding and cutting mechanism is located on one side of the insulating paper suction and attachment mechanism and is used to provide insulating paper and cut it to the required length. The insulating paper suction and attachment mechanism picks up the cut insulating paper and attaches it to the busbar isolation position on the surface of the photovoltaic cell string. The insulating paper is attached to the busbar isolation position on the surface of the photovoltaic cell string to prevent short circuits caused by contact between the busbar and the surface of the photovoltaic cell string; the insulating paper acts as a buffer between the surface of the photovoltaic cell string and the busbar, protecting the photovoltaic cell string.

2. The busbar welding method for solar photovoltaic cell strings as described in claim 1, characterized in that, The busbar contacts the end of the battery string in two ways: the photovoltaic battery string feeding and conveying mechanism conveys the photovoltaic battery string so that the end of the battery string contacts the busbar; or the busbar clamping and feeding mechanism clamps the busbar and transports it to contact the end of the photovoltaic battery string.

3. The busbar welding method for solar photovoltaic cell strings as described in claim 1, characterized in that, When the busbar contacts the end of the battery string, the busbar contacts the end of the battery string on the upper side, or the busbar contacts the end of the battery string on the lower side.

4. The busbar welding method for solar photovoltaic cell strings as described in claim 1, characterized in that, After the busbar contacts the end of the battery string, the platform of the busbar welding platform is located below the end of the battery string, supporting the end of the battery string and the busbar. The welding mechanism then welds the end of the battery string and the busbar together.

5. The busbar welding method for solar photovoltaic cell strings as described in claim 4, characterized in that, During welding, the busbar clamping and feeding mechanism clamps the busbar and welds it to the end of the battery string. Before the welding platform moves down, the busbar clamping and feeding mechanism clamps the busbar after welding. After the welding platform moves down, the busbar clamping and feeding mechanism releases the clamped busbar. Alternatively, during welding, the battery string end and the busbar are pressed together by a pressing structure.

6. The busbar welding method for a solar photovoltaic cell string as described in claim 1, characterized in that, The busbar welding platform includes a first-station busbar welding platform, the busbar clamping and feeding mechanism includes a first-station busbar clamping and feeding mechanism, and the busbar supply device includes a first-station busbar supply device, which supplies first-station busbars of a preset length. The photovoltaic cell string's cell string end includes a first cell string end. The photovoltaic cell string feeding and transmission mechanism transports the photovoltaic cell string including the first cell string end to the photovoltaic cell string feeding side of the first-station busbar welding platform. The first-station busbar clamping and feeding mechanism clamps the first-station busbar and transports it to the busbar feeding side of the first-station busbar welding platform. The first-station busbar on the busbar feeding side of the first-station busbar welding platform is controlled to contact the first cell string end on the photovoltaic cell string feeding side of the first-station busbar welding platform, and welding is performed at the contact position by a welding mechanism.

7. The busbar welding method for solar photovoltaic cell strings as described in claim 6, characterized in that, The busbar welding platform further includes a second-station busbar welding platform, and the busbar clamping and feeding mechanism further includes a second-station busbar clamping and feeding mechanism; the busbar supply device further includes a second-station busbar supply device, which supplies second-station busbars of a preset length; the second-station busbar clamping and feeding mechanism clamps the second-station busbar and transports it to the busbar feeding side of the second-station busbar welding platform; the photovoltaic cell string's cell string end includes a second cell string end; the photovoltaic cell string after the first-station busbar and the first cell string end are welded is transported to the cell string transfer mechanism through the photovoltaic cell string feeding and transmission mechanism, and then transported to the photovoltaic cell string feeding side of the second-station busbar welding platform through the cell string transfer mechanism; the second-station busbar on the busbar feeding side of the second-station busbar welding platform is controlled to contact the second cell string end on the photovoltaic cell string feeding side of the second-station busbar welding platform, and the contact position is welded by the welding mechanism.

8. The busbar welding method for a solar photovoltaic cell string as described in claim 6, characterized in that, The first station busbar clamping and feeding mechanism includes a first busbar clamping and feeding mechanism and a second busbar clamping and feeding mechanism; the first station busbar supply device includes a first busbar supply device and a second busbar supply device; the first busbar clamping and feeding mechanism and the first busbar supply device form a first busbar feeding unit, and the second busbar clamping and feeding mechanism and the second busbar supply device form a second busbar feeding unit; the first busbar feeding unit and the second busbar feeding unit are mirror images of the first station busbar welding platform on both sides of the first station busbar welding platform.

9. The busbar welding method for solar photovoltaic cell strings as described in any one of claims 1-8, characterized in that, After the ends of the photovoltaic cell string are welded to the busbars to be welded, the photovoltaic cell string assembly is unloaded from the cell string assembly unloading station. The photovoltaic cell string assembly from the cell string assembly unloading station is connected and fixed to the backplate by the first curing layer. The first curing layer is an EVA encapsulation film, which is heated by a heating device.

10. A busbar welding machine for solar photovoltaic cell strings, 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 1-9 to weld the busbars of the solar photovoltaic cell string.

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