Assembly line type solar photovoltaic cell string bus bar welding method and welding machine

Abstract

The invention relates to the technical field of solar photovoltaic cell string welding equipment manufacturing, photovoltaic equipment component manufacturing, electrical component assembly manufacturing and the like, and provides an assembly line type solar photovoltaic cell string bus bar welding method and a welding machine. The assembly line type conveying mechanism comprises a bus bar feeding station and a bus bar welding station, the conveying stop time of the assembly line type conveying mechanism is preset, and a bus bar is placed on the bus bar feeding station when the assembly line type conveying mechanism stops during bus bar feeding. When the photovoltaic cell strings and the bus bars exist on the bus bar welding station when the assembly line type conveying mechanism stops during bus bar welding, the contact portions of the photovoltaic cell strings and the bus bars on the bus bar welding station are welded through the welding mechanism, the mechanisms of different stations do not affect each other, and operation of the mechanisms is independently completed. And the welding efficiency of the bus bar and the battery string is greatly improved.

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 of electrical component assemblies, and in particular to an assembly line type bus bar welding method of a solar photovoltaic cell string and an assembly line type bus bar welding machine of a solar photovoltaic cell string. Background Art

[0002] In the production process of solar photovoltaic cell string products, it is necessary to weld the busbar to the cell string end of the photovoltaic cell string. In the prior art, the welding method of the busbar to the photovoltaic cell string is mainly sequence welding. In the sequence welding method, the mechanisms of multiple stations are queued according to the order of time. The mechanism of the previous station needs to wait for the mechanism of the next station to finish operation before it can start operation. The mechanisms of the previous and subsequent stations affect each other, which seriously limits the welding efficiency.

[0003] In summary, the existing busbar welding technology for photovoltaic cell strings has technical problems such as mutual influence between workstation mechanisms, which seriously limits welding efficiency. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned prior art, the present invention provides an assembly line type busbar welding method and welding machine for a solar photovoltaic cell string. By welding in an assembly line manner, the mechanisms at different workstations do not affect each other and independently complete their own operations, thereby improving the welding efficiency of the busbar and the cell string.

[0005] In a first aspect, the present invention provides a method for welding busbars of a solar photovoltaic cell string in an assembly line, comprising: An assembly line transmission mechanism is provided, wherein the assembly line transmission mechanism includes a bus bar loading station and a bus bar welding station; Presetting the transmission stop time of the pipeline transmission mechanism, the transmission stop time includes the time when the pipeline transmission mechanism stops when the busbar is loaded and the time when the pipeline transmission mechanism stops when the busbar is welded; When the assembly line transmission mechanism stops during bus bar loading, the bus bar is placed on the bus bar loading station. When the assembly line transmission mechanism stops during bus bar welding, if there are photovoltaic cell strings and bus bars on the bus bar welding station, the contact parts of the photovoltaic cell strings and bus bars on the bus bar welding station are welded by the welding mechanism.

[0006] In a second aspect, the present invention provides an assembly-line busbar welding machine for a solar photovoltaic cell string, which uses the above-mentioned assembly-line busbar welding method for a solar photovoltaic cell string to weld the busbars of the solar photovoltaic cell string.

[0007] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an assembly line type busbar welding method and welding machine for a solar photovoltaic cell string. An assembly line type transmission mechanism is provided, wherein the assembly line type transmission mechanism comprises a busbar loading station and a busbar welding station, and a transmission stop time of the assembly line type transmission mechanism is preset, wherein the transmission stop time comprises a stop time of the assembly line type transmission mechanism when the busbar is loaded and a stop time of the assembly line type transmission mechanism when the busbar is welded. When the assembly line type transmission mechanism stops during the busbar loading, a busbar is placed on the busbar loading station, and when the assembly line type transmission mechanism stops during the busbar welding, when a photovoltaic cell string and a busbar are present at the busbar welding station, a contact portion of the photovoltaic cell string and the busbar at the busbar welding station is welded by a welding mechanism, and mechanisms at different stations do not affect each other and independently complete their own operations, thereby greatly improving the welding efficiency of the busbar and the cell string. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute an improper limitation of the present invention. Some specific embodiments of the present invention will be described in detail in an exemplary and non-restrictive manner with reference to the drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 It is a schematic flow chart of a method for welding busbars of a solar photovoltaic cell string in an assembly line manner according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a busbar welding machine of an assembly line type solar photovoltaic cell string according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of a bent busbar feeding mechanism according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a left L-shaped busbar feeding mechanism and a right L-shaped busbar feeding mechanism according to an embodiment of the present invention; Figure 5 This is a structural schematic diagram of a straight busbar feeding mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram for comparing the states of cyclic loading of a photovoltaic cell string loading mechanism according to an embodiment of the present invention; Figure 7 This is a structural schematic diagram of a material box picking robot according to an embodiment of the present invention; Figure 8This is a structural schematic diagram of a battery string loading robot according to an embodiment of the present invention; Fig. 9 This is a structural schematic diagram of a battery string alignment mechanism according to an embodiment of the present invention; Fig.10 This is a schematic diagram of the structure of an automatic EL testing mechanism according to an embodiment of the present invention; Fig.11 It is a schematic diagram of a state of the busbar discharge mechanism of the embodiment of the present invention after placing the busbar and leaving the assembly line type transmission mechanism; Fig.12 It is a structural schematic diagram of the isolation piece attachment mechanism according to an embodiment of the present invention.

[0009] Description of reference numerals: 1. Assembly line transmission mechanism; 110. Straight busbar loading station; 111. Bending busbar loading station; 12. Photovoltaic cell string loading station; 130. Bending busbar welding station; 131. Straight busbar welding station; 14. Cell string assembly unloading station; 20. Straight busbar feeding mechanism; 201. Straight busbar welding coil unwinding mechanism; 202. Busbar feeding detection mechanism; 203. Solder flux feeding mechanism; 204. Straight busbar cutting mechanism; 205. Straight busbar belt pulling manipulator; 206. Straight busbar drying device; 21. Bending busbar feeding mechanism; 210. Belt feeding mechanism; 211. Bending and forming mechanism; 212. Shearing mechanism; 213. Pick-up and place mechanism; 214. Left L-shaped busbar feeding mechanism; 2140. Left L-shaped busbar drying device; 215. Right L-shaped busbar feeding mechanism; 2150. Right L-shaped busbar drying device; 3. Photovoltaic cell string loading mechanism; 30. Feeding transmission mechanism; 31. Discharging transmission mechanism; 32. Material box transport lifting mechanism; 40. Bending busbar welding mechanism; 41. Straight busbar welding mechanism; 42. Busbar unloading mechanism; 420. Suction nozzle; 5. Isolation piece attaching mechanism; 50. Isolation piece feeding and shearing mechanism; 51. Isolation piece suction attaching mechanism; 60. Automatic feeding mechanism for large glass; 61. EVA transmission mechanism for manual laying; 62. EVA assembly transmission mechanism for large glass; 63. Alignment and steering mechanism for EVA assembly for large glass; 70. Conveying mechanism for large and small glass EVA components; 71. Manual loading station for small glass EVA components; 72. Alignment, steering and correction mechanism for large and small glass EVA components; 720. Conveyor belt transportation mechanism for large and small glass EVA components; 721. Lifting and alignment mechanism for large and small glass EVA components; 73. Automatic EL testing mechanism; 74. Automatic fixing mechanism for EVA glass components; 75. NG battery string conveying mechanism; 8. Battery string alignment mechanism; 80. Battery string alignment correction mechanism; 81. String and string baffle; 82. Battery string side alignment correction assembly; 83. Battery terminal alignment correction assembly. DETAILED DESCRIPTION

[0010] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0011] Embodiment 1 See also Figure 1-Figure 12 This embodiment provides a method for welding busbars of a solar photovoltaic cell string in an assembly line, comprising the following steps: S101, setting up an assembly line transmission mechanism 1, wherein the assembly line transmission mechanism 1 includes a busbar loading station and a busbar welding station; S103, presetting the transmission stop time of the pipeline transmission mechanism 1, wherein the transmission stop time includes the stop time of the pipeline transmission mechanism when the busbar is loaded and the stop time of the pipeline transmission mechanism when the busbar is welded; S105. When the assembly line transmission mechanism stops during the busbar loading, a busbar is placed on the busbar loading station. When the assembly line transmission mechanism stops during the busbar welding, when there are photovoltaic cell strings and busbars on the busbar welding station, the contact parts of the photovoltaic cell strings and busbars on the busbar welding station are welded by the welding mechanism. The photovoltaic cell string on the busbar welding station may be a single cell string or multiple cell strings. When there are multiple photovoltaic cell strings on the busbar welding station, the multiple photovoltaic cell strings may be connected in series, in parallel, or in series and in parallel. The busbar on the busbar welding station may also include different numbers of busbars, and the shape of the busbar may also include a variety of different shapes. For example, there may be multiple straight busbars or multiple bent busbars on the busbar welding station. The busbar welding station may include a straight busbar and a bent busbar, and the straight busbar and the bent busbar may be distributed at the same end or different ends of the photovoltaic cell string.

[0012] It should be noted that, in this embodiment, by setting an assembly line transmission mechanism 1, the assembly line transmission mechanism 1 includes a bus bar loading station and a bus bar welding station, and the transmission stop time of the assembly line transmission mechanism 1 is preset, and the transmission stop time includes the time when the assembly line transmission mechanism stops when the bus bar is loaded and the time when the assembly line transmission mechanism stops when the bus bar is welded. When the assembly line transmission mechanism stops when the bus bar is loaded, the bus bar is placed on the bus bar loading station, and when the assembly line transmission mechanism stops when the bus bar is welded, when there are photovoltaic cell strings and bus bars on the bus bar welding station, the contact parts of the photovoltaic cell strings and bus bars on the bus bar welding station are welded by the welding mechanism, and the mechanisms of different stations do not affect each other, and independently complete their own operations, which greatly improves the welding efficiency of the bus bar and the battery string. Among them, step S101 divides the loading and welding of the bus bar into independent stations on the assembly line transmission mechanism by designing the production process into an assembly line mode. In this way, the busbar feeding and welding mechanisms can operate independently, reducing waiting time and improving welding efficiency. Step S103 ensures that each station has enough time to complete its own tasks by presetting the stop time of the transmission mechanism. The two types of time, the time when the assembly line transmission mechanism stops when the busbar is fed and the time when the assembly line transmission mechanism stops when the busbar is welded, are clearly allocated to avoid waiting between the various stations, ensuring that the operation of the mechanism of each station has high time accuracy, avoiding time conflicts between the mechanisms of each station, and thus reducing operation waiting. Step S105, after the busbar is placed at the feeding station, it is transferred to the welding station, while ensuring that the busbar and the photovoltaic cell string are in stable contact at the welding station, and the contact parts are welded by the welding mechanism, thereby eliminating the situation in which the previous station needs to wait for the next station to complete the operation in the sorting welding, and improving the utilization rate of the welding station. It should be noted that, in this embodiment, the transmission stop time of the pipeline transmission mechanism 1 may refer to the time when the pipeline transmission mechanism 1 stops transmission, or may refer to the waiting time when the pipeline transmission mechanism 1 adjusts the transmission speed to a slow waiting state.

[0013] In some preferred embodiments, the assembly-line transmission mechanism 1 further includes a photovoltaic cell string loading station 12, and the transmission stop time also includes the time when the assembly-line transmission mechanism stops when the photovoltaic cell string is loaded; the photovoltaic cell string is placed at the photovoltaic cell string loading station 12 during the time when the assembly-line transmission mechanism stops when the photovoltaic cell string is loaded. Exemplarily, the photovoltaic cell string loading station 12 is upstream or downstream of the bus bar loading station. Exemplarily, the photovoltaic cell string loading station is upstream or downstream of the straight bus bar loading station and the bent bus bar loading station. Optionally, the bus bar loading station may include the straight bus bar loading station 110 alone, or may include the bent bus bar loading station 111 alone.

[0014] Preferably, the busbar loading station includes a straight busbar loading station 110 and a bent busbar loading station 111, and the straight busbar loading station 110 is located upstream or downstream of the bent busbar loading station 111. It should be noted that the photovoltaic cell string loading station 12 can ensure that the photovoltaic cell string and the busbar arrive at the welding station synchronously or quasi-synchronously, avoiding waiting at the welding station, and further allocating and optimizing the transmission stop time in the assembly line, so that the loading and transmission time of each stage are reasonably arranged, thereby improving the production efficiency of the entire assembly line. In addition, the photovoltaic cell string loading station 12 can be located upstream or downstream of the busbar loading station. The specific position depends on the requirements of the production process. For example, selecting the upstream position allows the photovoltaic cell string to be prepared in advance and transmitted stably, while selecting the downstream position is more conducive to adjusting the loading timing of the photovoltaic cell string according to the specific state of the busbar loading to achieve the best match. In addition, the busbars are divided into straight busbars and bent busbar loading stations 111, which can meet the welding requirements of busbars of different shapes. The loading stations can be flexibly adjusted for busbars of different specifications or designs. It can be understood that in this embodiment, by adding different types of loading stations and reasonably arranging upstream or downstream positions, each type of busbar and photovoltaic cell string can be loaded according to a predetermined order and accurately reach the welding station, thereby improving welding efficiency and reducing waiting time.

[0015] In some preferred embodiments, the photovoltaic cell string loading station 12 is located between the straight bus bar loading station 110 and the bent bus bar loading station 111; or, the photovoltaic cell string loading station 12 is located upstream or downstream of the straight bus bar loading station 110 and the bent bus bar loading station 111. The bus bar welding station includes a bent bus bar welding station 130 and a straight bus bar welding station 131, and the bent bus bar welding station 130 is located upstream or downstream of the straight bus bar welding station 131; or, the straight bus bar welding station and the bent bus bar welding station are set as the same welding station. The welding mechanism includes a bent bus bar welding mechanism 40 and a straight bus bar welding mechanism 41; the bent bus bar welding mechanism 40 is set at the bent bus bar welding station 130, and the straight bus bar welding mechanism 41 is set at the straight bus bar welding station 131. The busbar is fed through a busbar feeding mechanism, and the busbar feeding mechanism includes a straight busbar feeding mechanism 20 and a bent busbar feeding mechanism 21; the straight busbar feeding mechanism 20 is arranged at the straight busbar feeding station 110, and the bent busbar feeding mechanism 21 is arranged at the bent busbar feeding station 111. It should be noted that the photovoltaic cell string feeding station 12 is arranged between the straight busbar and the bent busbar feeding station 111, which can optimize the connection and transmission between the photovoltaic cell string and the busbar. Under this setting, the photovoltaic cell string can be flexibly combined with a straight busbar or a bent busbar according to production requirements. Since the photovoltaic cell string feeding is located in the middle position, it is possible to balance the time allocation between the upstream and downstream stations, thereby improving the coordination of the production rhythm. It should be noted that the straight busbar and the bent busbar can be welded at the same welding station, but this method only allows the welding of cell strings of the same length. In this embodiment, the bent busbar welding station 130 is preferably located upstream or downstream of the straight busbar welding station 131, which can enhance the flexibility of the production line and adapt to battery strings of different lengths. Preferably, the upstream station can preferentially weld the bent busbars and then weld the straight busbars. This sorting method can be dynamically adjusted according to the actual needs of production, thereby improving the overall production efficiency. In addition, other stations can also be set between the straight busbar welding station and the bent busbar welding station to complete other processes that need to be implemented on the assembly line. In addition, independent welding mechanisms are set for straight busbars and bent busbars to ensure that each busbar has dedicated equipment for welding. The bent busbar welding mechanism 40 is located on one side of the bent busbar welding station 130, while the straight busbar welding mechanism 41 is located on one side of the straight busbar welding station 131, which avoids the mixing of equipment for different welding processes, improves welding accuracy, reduces errors and equipment adjustment time, and makes the welding process more efficient. In addition, by separately providing feeding mechanisms for the straight busbars and the bent busbars, a more efficient feeding operation can be achieved.The straight busbar feeding mechanism 20 is arranged on one side of the straight busbar feeding station 110, and the bent busbar feeding mechanism 21 is located on one side of the bent busbar feeding station 111, so as to reduce the interference of different busbar types during the feeding process. It can be understood that in the above embodiment, each feeding and welding station can be operated independently without waiting for each other, thereby greatly improving the production capacity of the entire production system.

[0016] In some further preferred embodiments, the straight bus bar feeding mechanism 20 is located upstream of the bent bus bar feeding mechanism 21, the bent bus bar welding mechanism 40 and the straight bus bar welding mechanism 41 are located downstream of the bent bus bar feeding mechanism 21, the bent bus bar welding mechanism 40 is located upstream of the straight bus bar welding mechanism 41, and a photovoltaic cell string feeding mechanism 3 is arranged on one side of the photovoltaic cell string feeding station 12, and the photovoltaic cell string feeding mechanism 3 is located upstream of the bent bus bar feeding mechanism 21 and located at the straight bus bar feeding mechanism 20; the straight bus bar feeding mechanism 20 places the straight bus bar to the straight bus bar loading station 110, and after the straight bus bar located at the straight bus bar loading station 110 is transferred to the photovoltaic cell string loading station 12, the photovoltaic cell string loading mechanism 3 places the photovoltaic cell string to the photovoltaic cell string loading station 12 so that the cell string ends of the photovoltaic cell string are crimped to the straight bus bar to obtain a first crimping assembly, and the first crimping assembly is transferred to the bending bus bar loading station 111 to receive the bending bus bar loading mechanism 21 to load the bending bus bar to obtain a second crimping assembly. The second crimping assembly is transferred to the bent bus bar welding station 130, and is welded by the bent bus bar welding mechanism 40. After welding, the second crimping assembly is transferred to the straight bus bar welding station 131, and is welded by the straight bus bar welding mechanism 41, so that the first contact portion between the straight bus bar of the second crimping assembly and the battery string end of the photovoltaic cell string is welded, and the second contact portion between the bent bus bar of the second crimping assembly and the battery string end of the photovoltaic cell string is welded. In this embodiment, the straight bus bar welding station 131 is arranged downstream of the bent bus bar welding station 130, and the contact portion between the bent bus bar of the second crimping assembly and the battery string end of the photovoltaic cell string is welded first, and then the contact portion between the straight bus bar of the second crimping assembly and the battery string end of the photovoltaic cell string is welded. It should be noted that, in this embodiment, by placing the straight bus bar feeding mechanism 20 upstream of the bent bus bar feeding mechanism 21 and reasonably arranging the downstream position of the welding mechanism, the smoothness and efficiency of the production line can be ensured, thereby reducing the waiting time and the conflict between processes and improving the overall production efficiency. In addition, the photovoltaic cell string feeding mechanism 3 is located upstream of the bent bus bar feeding mechanism 21 and downstream of the straight bus bar feeding mechanism 20, ensuring that the photovoltaic cell string and the straight bus bar can arrive at the welding station synchronously or quasi-synchronously, avoiding the waiting time of the welding station, and further improving the production efficiency. In addition, in this embodiment, by performing crimping and welding in steps, first forming a first crimping assembly (crimping of the straight bus bar and the photovoltaic cell string), then forming a second crimping assembly (adding crimping of the bent bus bar on the basis of the first crimping assembly), and finally welding the two contact parts respectively, which helps to ensure the accuracy and quality of welding and reduce welding defects.Independent welding mechanisms are provided for straight busbars and bent busbars respectively to avoid the situation where different welding processes use mixed equipment, thereby improving the accuracy and efficiency of welding. In this embodiment, the order of the bent busbar welding station 130 and the straight busbar welding station 131 can be flexibly adjusted according to production requirements, which helps to adapt to different production requirements and product specifications and enhance the adaptability and competitiveness of the production line. In addition, each loading and welding station can operate independently without waiting for other stations to complete operations, thereby improving the production capacity and efficiency of the production system. It should be noted that in actual production, you can choose to load the bent busbars first and then weld them, and then load the straight busbars and then weld them; you can also load the straight busbars first and then weld them, and then load the bent busbars and then weld them.

[0017] In some further preferred embodiments, the bent busbar feeding mechanism 21 includes a tape supply mechanism 210, a bending and forming mechanism 211, a pick-up and placement mechanism 213, and a shearing mechanism 212. The tape supply mechanism 210 is located on one side of the bending and forming mechanism 211, the shearing mechanism 212 is located on the other side of the bending and forming mechanism 211, and the pick-up and placement mechanism 213 is located on one side of the bending and forming mechanism 211. The busbar provided by the tape supply mechanism 210 is bent and formed by the bending and forming mechanism 211 to obtain a busbar with a bending portion. The busbar with a bending portion is sheared by the shearing mechanism 212 and then picked up and placed by the pick-up and placement mechanism 213. It can be understood that the number of the bent busbar feeding mechanism 21 can be one or more. Preferably, the bent busbar loading mechanism 21 includes a left L-shaped busbar loading mechanism 214 and a right L-shaped busbar loading mechanism 215. With reference to the transmission direction of the assembly line transmission mechanism 1, the left L-shaped busbar loading mechanism and the right L-shaped busbar loading mechanism are respectively located on the left and right sides of the assembly line transmission mechanism 1; wherein, a left L-shaped busbar drying device 2140 can be provided on the left L-shaped busbar loading mechanism 214 to dry the flux on the left L-shaped busbar; and a right L-shaped busbar drying device 2150 can be provided on the right L-shaped busbar loading mechanism 215 to dry the flux on the right L-shaped busbar. It should be noted that after the left L-shaped busbar feeding mechanism and the right L-shaped busbar feeding mechanism are loaded, the contact state between the busbar and the battery string is: the bending opening direction of one busbar is toward the left side of the battery string end, that is, the left L-shaped busbar, and the bending opening direction of one busbar is toward the right side of the battery string end, that is, the right L-shaped busbar. In addition, the straight busbar feeding mechanism 20 may include a straight busbar welding coil unloading mechanism 201, a busbar feeding detection mechanism 202, a flux feeding mechanism 203, a straight busbar cutting mechanism 204, a straight busbar pulling robot 205 and a straight busbar drying device 206; after the straight busbar welding coil unloading mechanism 201 provides the busbar material strip, the busbar feeding detection mechanism 202, the flux feeding mechanism 203, the straight busbar drying device 206 and the straight busbar cutting mechanism 204 are arranged on the feeding path of the busbar material strip. The busbar feeding detection mechanism 202 detects the presence or absence of the busbar material strip, the flux feeding mechanism 203 provides flux for the busbar material strip, the straight busbar drying device 206 dries the flux on the busbar material strip, the straight busbar cutting mechanism 204 cuts off the busbar material strip containing flux and is taken away by the straight busbar pulling manipulator 205, and is fed to the feeding position of the straight busbar, which can be a selected position of the conveyor belt on the assembly line conveyor mechanism 1, or a set position outside the assembly line conveyor mechanism 1. When the straight busbar is fed to the selected position of the conveyor belt on the assembly line conveyor mechanism 1, there can be two feeding methods.Method 1: The selected position of the conveyor belt on the assembly-line transmission mechanism 1 is used as the straight bus bar loading station 110, and the straight bus bar is fed to the selected position of the conveyor belt on the assembly-line transmission mechanism 1 to complete the loading; Method 2: The bus bar unloading mechanism 42 takes away the straight bus bar at the selected position of the conveyor belt on the assembly-line transmission mechanism 1, and loads it to the straight bus bar loading station 110. When the straight bus bar is fed to the set position outside the assembly-line transmission mechanism 1, the bus bar unloading mechanism 42 takes away the straight bus bar at the set position outside the assembly-line transmission mechanism 1, and loads it to the straight bus bar loading station 110. It should be noted that the straight bus bar drying device 206 is provided on the straight bus bar feeding mechanism 20 to dry the flux provided by the flux feeding mechanism 203 to the bus bar material belt, and the drying of the flux is realized during the straight bus bar feeding process, which greatly improves the efficiency of the straight bus bar feeding.

[0018] In some further embodiments, the photovoltaic cell string loading mechanism 3 may include a feeding conveying mechanism 30, a discharging conveying mechanism 31 and a material box transfer lifting mechanism 32; the feeding conveying mechanism 30 is located on one side of the discharging conveying mechanism 31, and the material box transfer lifting mechanism 32 is located on the same side of the feeding conveying mechanism 30 and the discharging conveying mechanism 31; the material box transfer lifting mechanism 32 lifts and transfers the battery string material box, so that after the battery string in the material box loaded with the battery string on the discharging conveying mechanism 31 is taken away by the material box taking robot, the empty battery string material box is transferred to the feeding conveying mechanism 30 to receive the loading of the battery string, and the material box loaded with the battery string is transferred to the material box transfer lifting mechanism 32 through the feeding conveying mechanism 30. It should be noted that, in the present embodiment, the feed conveying mechanism 30, the discharge conveying mechanism 31 and the material box transfer lifting mechanism 32 can all process multiple material boxes at the same time, and because the material box transfer lifting mechanism 32 lifts and transfers the battery string material box, after the battery string in the material box loaded with battery strings on the discharge conveying mechanism 31 is taken away by the material box taking robot, the empty battery string material box is transferred to the feed conveying mechanism 30 to receive the loading of battery strings, and the material box loaded with battery strings is transferred to the material box transfer lifting mechanism 32 through the feed conveying mechanism 30, so that the photovoltaic cell string loading mechanism 3 can cyclically transfer the material boxes, allowing the material box taking robot to continuously take away the photovoltaic cell strings in the material boxes, thereby realizing efficient loading.

[0019] In some further preferred embodiments, the material box taking manipulator takes out the photovoltaic cell string in the material box and then transports it to the cell string alignment mechanism 8 for alignment to generate the cell string reference position. The aligned cell string is taken out by the cell string loading manipulator and placed in the photovoltaic cell string loading station 12. Further, the cell string alignment mechanism 8 includes a cell string alignment correction mechanism 80, a string-to-string baffle 81, a cell string side alignment correction component 82, and a cell terminal alignment correction component 83; the string-to-string baffle 81 and the cell string side alignment correction component 82 are arranged in parallel on the cell string alignment correction mechanism 80 to form a cell string alignment mechanism with the cell string long side alignment function and the different cell string separation function on the cell string alignment correction mechanism 80, and the cell terminal alignment correction component 83 is arranged at the end of the cell string alignment mechanism, and the cell terminal alignment correction component 83 contacts the short side of the cell string transported to the position to perform alignment correction on the short side of the cell string. It should be noted that, in the present embodiment, since the string-to-string baffle 81 and the battery string side alignment correction component 82 are arranged in parallel on the battery string alignment correction mechanism 80, so as to form a battery string alignment mechanism having the battery string long side alignment function and the function of separating different battery strings on the battery string alignment correction mechanism 80, the battery end alignment correction component 83 is arranged at the end of the battery string alignment mechanism, and the battery end alignment correction component 83 contacts the short side of the battery string transported to the position, and performs alignment correction on the short side of the battery string, so that the battery string loading robot can take the battery string after the alignment generates the battery string reference position and place it into the photovoltaic battery string loading station 12, so as to design the transmission rhythm of the assembly line transmission mechanism 1 based on this reference position.

[0020] In some further preferred embodiments, the bus bar loading mechanism is used to place the bus bar on the assembly line conveyor belt corresponding to the bus bar loading station when the assembly line transmission mechanism stops when the bus bar is being loaded; the bus bar loading mechanism includes a bus bar unloading mechanism 42, and the bus bar unloading mechanism 42 includes a suction nozzle 420, and the suction nozzle 420 is externally connected to a negative pressure source; when the bus bar is placed on the assembly line conveyor belt, the assembly line conveyor belt is in a stationary state, and the suction nozzle 420 absorbs the bus bar and presses the absorbed bus bar down to contact the surface of the assembly line conveyor belt and then rises up and leaves the bus bar after the negative pressure in the negative pressure source is canceled. It should be noted that in the prior art, when the suction nozzle 420 discharges the adsorbed busbar, the busbar is not pressed down to the surface of the placement position, which often causes the discharged busbar to fall to the surface of the placement position in a falling manner. The busbar is very light, so it is easy for the busbar to be not accurate enough in the placement position and cause deviation due to the disappearance of air and negative pressure suction and collision with the placement position. In this embodiment, since the busbar is placed on the assembly line conveyor belt, the assembly line conveyor belt is in a stationary state, the suction nozzle 420 adsorbs the busbar and presses the adsorbed busbar down to contact the surface of the assembly line conveyor belt and rises away from the busbar after the negative pressure in the negative pressure source is cancelled, so that the busbar can be accurately placed, so that other stations on the assembly line transmission mechanism 1 are not affected by the displacement of the busbar placement, thereby improving the quality of the finished products of the production line. It can be understood that in this embodiment, the suction nozzle 420 can be a standard suction nozzle 420 or a homemade suction nozzle 420 made according to actual needs.

[0021] In some further preferred embodiments, an isolating member attaching mechanism 5 is provided on one side of the assembly line transmission mechanism 1, and the isolating member attaching mechanism 5 attaches the isolating member to the busbar isolating position on the surface of the photovoltaic cell string. It should be noted that the isolating member attached to the busbar isolating position on the surface of the photovoltaic cell string can prevent the busbar from contacting the surface of the photovoltaic cell string and causing a short circuit. In addition, since the photovoltaic cell string is fragile, the isolating member can act as a buffer between the surface of the photovoltaic cell string and the busbar to protect the photovoltaic cell string. In addition, according to actual conditions, when the isolating member is attached to the busbar isolating position on the surface of adjacent different photovoltaic cell strings, it can also play a role in limiting the adjacent different photovoltaic cell strings to avoid position deviation between different photovoltaic cell strings. In some preferred embodiments, the isolation member attaching mechanism 5 includes an isolation member feeding and shearing mechanism 50 and an isolation member suction and attaching mechanism 51; the isolation member feeding and shearing mechanism 50 is located on one side of the isolation member suction and attaching mechanism 51, and is used to provide isolation members and shear isolation members of a required length, and the isolation member suction and attaching mechanism 51 sucks the sheared isolation members and attaches them to the busbar isolation position on the surface of the photovoltaic cell string.

[0022] In some further preferred embodiments, when the isolation piece attaching mechanism 5 is set, the straight bus bar feeding mechanism 20 is located upstream of the bent bus bar feeding mechanism 21, and the welding mechanism is located downstream of the bent bus bar feeding mechanism 21; the straight bus bar feeding mechanism 20 places the straight bus bar on the straight bus bar feeding station 110, and after the straight bus bar located at the straight bus bar feeding station 110 is transferred to the photovoltaic cell string feeding station 12, the photovoltaic cell string feeding mechanism 3 places the photovoltaic cell string on the photovoltaic cell string feeding station 12 so that the cell string end of the photovoltaic cell string is crimped to the straight bus bar. The first crimping assembly is obtained by the strip, and the isolation member attaching mechanism 5 attaches the isolation member to the busbar isolation position on the surface of the photovoltaic cell string of the first crimping assembly. After the first crimping assembly with the isolation member attached is transferred to the bent busbar loading station 111, the bent busbar loading mechanism 21 places the bent busbar on the bent busbar loading station 111, so that the bent busbar is crimped to the battery string end of the photovoltaic cell string of the first crimping assembly, and the second crimping assembly is transferred to the busbar welding station, and the contact part between the photovoltaic cell string and the busbar on the busbar welding station is welded by the welding mechanism. It should be noted that isolation members play a vital role in the production of photovoltaic cell strings. They are used to prevent short circuits between busbars, protect the battery string from damage by the external environment, and improve the safety and reliability of the overall assembly. In this embodiment, it is considered that if the bent busbar is loaded first, the bent busbar will block the busbar isolation position, resulting in the inability of the isolation member to be properly attached. Therefore, in this embodiment, the straight busbar is processed first and placed in the straight busbar loading station 110. After the straight busbar and the photovoltaic cell string are initially crimped and the first crimping assembly is formed, the spacer is attached, and then the bent busbar is loaded to ensure that the spacer can be correctly attached before the bent busbar is loaded. Optionally, when attaching the spacer, the spacer can also be attached after the alignment of the cell string alignment correction mechanism 80 is completed.

[0023] In some preferred embodiments, the assembly-line transmission mechanism 1 further includes a battery string assembly discharging station 14, wherein the battery string assembly is an assembly formed by the bus bar and the photovoltaic cell string after the bus bar is welded to the photovoltaic cell string; the transmission stop time also includes the time when the assembly-line transmission mechanism stops when the battery string assembly is discharged; the battery string assembly is removed from the battery string assembly discharging station at the time when the assembly-line transmission mechanism stops when the battery string assembly is discharged. It should be noted that the setting of the discharging station enables the welded battery string assembly to be directly removed from the discharging station after production is completed, thereby reducing the stagnation time of the production line. In addition, incorporating the discharging time of the battery string assembly into the transmission stop time can accurately control the working sequence of each station to ensure that loading, welding and discharging are carried out in an orderly manner in the assembly line. The addition of discharge time helps to form a complete time closed loop in each cycle, ensuring that the components are discharged within the predetermined time node and free up space for new photovoltaic cell strings to enter the welding station, so that each production step has a clear time constraint, avoiding chain reactions due to step delays, and further improving production efficiency. In addition, the setting of the discharge station also facilitates the quality inspection and management of finished components. Each welded component can be fully inspected at the discharge station to ensure that the welding quality meets the requirements. If problems are found at this stage, the components can be reworked in time to avoid flowing into the next link.

[0024] In some further preferred embodiments, a large glass automatic feeding mechanism 60, a manually laid EVA transmission mechanism 61, a large glass EVA assembly transmission mechanism 62 after laying EVA, a large glass EVA assembly alignment and steering mechanism 63, a large and small glass EVA assembly conveying mechanism 70, and a large and small glass EVA assembly alignment and steering mechanism 72 are arranged on one side of the battery string assembly discharge station 14; the large glass automatic feeding mechanism 60, the manually laid EVA transmission mechanism 61, the large glass EVA assembly transmission mechanism 62, and the large glass EVA assembly alignment and steering mechanism 63 are arranged in sequence to form a large glass EVA assembly processing production line; the large and small glass EVA assembly conveying mechanism 70 is located on the discharge side of the large glass EVA assembly alignment and steering mechanism 63, and a small glass EVA assembly manual feeding station 71 is arranged on one side of the large and small glass EVA assembly conveying mechanism 70, and the large and small glass EVA assembly alignment and steering mechanism 72 are arranged on one side of the large and small glass EVA assembly conveying mechanism 70. The structure 72 is located at the discharge side of the large and small glass EVA component conveying mechanism 70; the processing of large glass EVA components and small glass EVA components is carried out selectively, when the small glass EVA components are manually loaded at the small glass EVA component manual loading station, the large glass EVA component processing production line stops, and when the large glass EVA component processing production line is in operation, the small glass EVA component manual loading station stops manual loading; after the large and small glass EVA component alignment, steering and correction mechanism 72 completes the alignment and correction of the large glass EVA components or the small glass EVA components, the battery string components taken away by the battery string component discharge station 14 fall onto the glass EVA components after the alignment and correction; or, the glass EVA components after the alignment and correction are transmitted to a designated suitable position, and the battery string components taken away by the battery string component discharge station 14 fall onto the glass EVA components at the designated suitable position to obtain the glass EVA components of the battery string to be tested. When the alignment, turning and correcting mechanism 72 of the large and small glass EVA components performs alignment and correcting on the large and small glass EVA components, there are two alignment methods, namely, alignment method 1 and alignment method 2. Alignment method 1 refers to that the alignment, turning and correcting mechanism 72 of the large and small glass EVA components is in the ascending position, and when the large and small glass EVA components are transmitted to the side of the alignment, turning and correcting mechanism 72 of the large and small glass EVA components in the ascending position, the alignment, turning and correcting mechanism 72 of the large and small glass EVA components completes the alignment of the large and small glass EVA components or the small glass EVA components. Alignment method 2 refers to that the alignment, turning and correcting mechanism 72 of the large and small glass EVA components is in the descending position, and the large and small glass EVA components pass over the alignment, turning and correcting mechanism 72 of the large and small glass EVA components in the descending position, and the alignment, turning and correcting mechanism 72 of the large and small glass EVA components in the descending position rises, and the large and small glass EVA components or the small glass EVA are reversely transmitted close to the alignment, turning and correcting mechanism 72 of the large and small glass EVA components to complete the alignment.The alignment, steering and correction mechanism 72 of the large and small glass EVA components is lowered after completing the alignment through alignment method one or alignment method two. It should be noted that in the present embodiment, since the processing of the large glass EVA components and the small glass EVA components is performed selectively, when the small glass EVA components are manually loaded at the manual loading station of the small glass EVA components, the large glass EVA component processing production line stops operating, and when the large glass EVA component processing production line operates, the manual loading station of the small glass EVA components stops manual loading. Therefore, the processing of the large glass EVA components and the small glass EVA components can be integrated together, which greatly saves costs and provides users with a variety of processing options for glass EVA components. Among them, the large and small glass EVA component conveying mechanism 70 and the large and small glass EVA component alignment, steering and correction mechanism 72 can both perform corresponding processing on the large glass EVA components or the small glass EVA components separately, which not only greatly saves costs, but also greatly reduces the space occupied by the welding production line, making it convenient for users to install and use. Furthermore, the alignment, steering and correction mechanism 72 for the large and small glass EVA components includes a large and small glass EVA component conveyor belt transport mechanism 720 and a large and small glass EVA component lifting and alignment mechanism 721; the large and small glass EVA component lifting and alignment mechanism is located at the discharge side of the large and small glass EVA component conveying mechanism 70, and is between the large and small glass EVA component conveying mechanism 70 and the large and small glass EVA component conveyor belt transport mechanism; the large and small glass EVA component conveyor belt transport mechanism transports the large glass EVA component or the small glass EVA component to contact the large and small glass EVA component lifting and alignment mechanism when rising, so as to realize the alignment and correction of the large glass EVA component or the small glass EVA component. It should be noted that, according to actual needs, a mechanism and process for processing large glass EVA components can be set separately, or a mechanism and process for processing small glass EVA components can be set separately.

[0025] In some further preferred embodiments, the large and small glass EVA component alignment, turning and correcting mechanism 72 is respectively provided with an automatic EL testing mechanism 73, an NG battery string conveying mechanism 75 and an automatic fixing EVA glass component mechanism 74 at different positions in the discharge direction; the large and small glass EVA component alignment, turning and correcting mechanism 72 transmits the battery string glass EVA component to be tested to one side of the automatic EL testing mechanism 73 for EL testing, and the qualified battery string glass EVA component that passes the test is conveyed to the automatic fixing EVA glass component mechanism 74 for EVA packaging film fixation, and the NG battery string glass EVA component that fails the test is conveyed out through the NG battery string conveying mechanism 75 for repair. It should be noted that the EL test (Electroluminescence Testing: Electroluminescence Testing) can detect defects in welding or components themselves, such as cracks or short circuits, and timely separate unqualified battery string components for repair processing, so as to avoid unqualified products from entering the next process and improve the yield rate. After passing the test, the qualified components directly enter the EVA packaging film fixing process, which can ensure the smooth connection of the process. As an important protective material for photovoltaic modules, the quality of EVA encapsulation film is crucial to the durability and reliability of the finished product. Directly transporting qualified components to the EVA fixing station can avoid the damage of the qualified battery string components due to multiple handling, and ensure that the packaging and fixing are carried out immediately after the quality inspection is qualified, reducing the process problems caused by delays. It can be understood that in this embodiment, the large and small glass EVA component alignment and turning correction mechanism 72 transmits the glass EVA component of the battery string to be tested to one side of the automatic EL testing mechanism 73 for EL testing, and the qualified battery string glass EVA component that passes the test is transported to the automatic fixing EVA glass component mechanism 74 for EVA encapsulation film fixation, and the NG battery string glass EVA component that fails the test is transported out through the NG battery string transport mechanism 75 for repair, which can form a complete quality control and packaging process, realize the automatic closed loop from component welding, detection to packaging, ensure that each product can undergo strict testing and packaging steps, and make the entire production process both efficient and reliable. Among them, the automatic EL testing mechanism 73 can test the glass EVA component of the battery string to be tested through the automatic EL test needle and imaging system.

[0026] Embodiment 2 See also Figure 1-Figure 12 Based on the above embodiments, this embodiment provides an assembly-line busbar welding machine for a solar photovoltaic cell string. The assembly-line busbar welding machine for a solar photovoltaic cell string applies the assembly-line busbar welding method for a solar photovoltaic cell string described in any of the above embodiments to weld the busbars of the solar photovoltaic cell string.

[0027] The above embodiments are only preferred specific implementation modes 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 any technician familiar with the technical field 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 based on the protection scope of the claims.

Claims

1. A method for welding busbars of a solar photovoltaic cell string in an assembly line, characterized in that: include: An assembly line transmission mechanism is provided, wherein the assembly line transmission mechanism includes a bus bar loading station and a bus bar welding station; Presetting the transmission stop time of the pipeline transmission mechanism, the transmission stop time includes the time when the pipeline transmission mechanism stops when the busbar is loaded and the time when the pipeline transmission mechanism stops when the busbar is welded; When the assembly line transmission mechanism stops during bus bar loading, the bus bar is placed on the bus bar loading station. When the assembly line transmission mechanism stops during bus bar welding, if there are photovoltaic cell strings and bus bars on the bus bar welding station, the contact parts of the photovoltaic cell strings and bus bars on the bus bar welding station are welded by the welding mechanism.

2. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 1, characterized in that: The assembly-line transmission mechanism also includes a photovoltaic cell string loading station, and the transmission stop time also includes the time when the assembly-line transmission mechanism stops when the photovoltaic cell string is loaded; the photovoltaic cell string is placed on the photovoltaic cell string loading station during the time when the assembly-line transmission mechanism stops when the photovoltaic cell string is loaded.

3. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 1, characterized in that: The assembly-line transmission mechanism also includes a battery string assembly unloading station, and the battery string assembly is an assembly formed by the bus bar and the photovoltaic cell string after the photovoltaic cell string is welded to the bus bar; the transmission stop time also includes the time when the assembly-line transmission mechanism stops when the battery string assembly is unloaded; the battery string assembly is removed from the battery string assembly unloading station at the time when the assembly-line transmission mechanism stops when the battery string assembly is unloaded.

4. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 2, characterized in that: The photovoltaic cell string loading station is located upstream or downstream of the bus bar loading station.

5. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 2, characterized in that: The busbar loading station includes a straight busbar loading station and a bent busbar loading station, and the straight busbar loading station is located upstream or downstream of the bent busbar loading station.

6. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 5, characterized in that: The photovoltaic cell string loading station is located between the straight bus bar loading station and the bent bus bar loading station, or the photovoltaic cell string loading station is located upstream or downstream of the straight bus bar loading station and the bent bus bar loading station.

7. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 5, characterized in that: The busbar welding station includes a straight busbar welding station and a bent busbar welding station, the straight busbar welding station is located upstream or downstream of the bent busbar welding station, or the straight busbar welding station and the bent busbar welding station are set as the same welding station.

8. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 7, characterized in that: The welding mechanism comprises a straight bus bar welding mechanism and a bent bus bar welding mechanism; the straight bus bar welding mechanism is arranged at the straight bus bar welding station, and the bent bus bar welding mechanism is arranged at the bent bus bar welding station.

9. The assembly line busbar welding method of solar photovoltaic cell string as claimed in claim 5, characterized in that: The busbars are loaded through a busbar loading mechanism, which includes a straight busbar feeding mechanism and a bent busbar loading mechanism; the straight busbar feeding mechanism is arranged at the straight busbar loading station, and the bent busbar loading mechanism is arranged at the bent busbar loading station.

10. A production line type busbar welding machine for solar photovoltaic cell strings, characterized in that: The assembly-line busbar welding machine for a solar photovoltaic cell string uses the assembly-line busbar welding method for a solar photovoltaic cell string as described in any one of claims 1 to 9 to weld the busbars of the solar photovoltaic cell string.

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