Pipelined solar photovoltaic cell string busbar welding method and welding machine

Abstract

The application relates to the technical field of solar photovoltaic cell string welding equipment manufacturing, photovoltaic device component manufacturing and electrical component assembly manufacturing, and provides a flow line type solar photovoltaic cell string busbar welding method and welding machine. A flow line type transmission mechanism is arranged, the flow line type transmission mechanism comprises a busbar feeding station and a busbar welding station, a transmission stop time of the flow line type transmission mechanism is preset, the busbar feeding station is placed with the busbar during the time when the flow line type transmission mechanism stops during busbar feeding, when the busbar welding station is provided with the photovoltaic cell string and the busbar during the time when the flow line type transmission mechanism stops during busbar welding, the contact positions of the photovoltaic cell string and the busbar on the busbar welding station are welded through a welding mechanism, the mechanisms of different stations do not affect each other, and the operations of the stations are independently completed, so that the welding efficiency of the busbar and the cell string is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical fields of solar photovoltaic cell string welding equipment manufacturing, photovoltaic device component manufacturing, and electrical component assembly manufacturing, and particularly relates to a flow line type solar photovoltaic cell string busbar welding method and a flow line type solar photovoltaic cell string busbar welding machine. BACKGROUND

[0002] In the production process of a solar photovoltaic cell string product, a busbar needs to be welded with a cell string end of a photovoltaic cell string. In the prior art, the welding method of the busbar and the photovoltaic cell string is mainly a sequencing type welding. In the sequencing type welding method, mechanisms of multiple stations are queued according to the time sequence, and the mechanism of the previous station needs to wait until the operation of the mechanism of the next station is completed before starting the operation. The mechanisms of the previous and next stations affect each other, which seriously limits the welding efficiency.

[0003] In summary, the existing busbar welding technology of a photovoltaic cell string has the technical problems of mutual influence between the station mechanisms, which seriously limits the welding efficiency. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a flow line type solar photovoltaic cell string busbar welding method and a welding machine. The busbar is welded in a flow line manner, the mechanisms of different stations do not affect each other, and the operation of each station is completed independently, thereby improving the welding efficiency of the busbar and the cell string.

[0005] In a first aspect, the present application provides a flow line type solar photovoltaic cell string busbar welding method, which comprises the following steps.

[0006] A flow line type transmission mechanism is provided, which comprises a busbar feeding station and a busbar welding station.

[0007] The transmission stop time of the flow line type transmission mechanism is preset, which comprises the time when the flow line type transmission mechanism stops during busbar feeding and the time when the flow line type transmission mechanism stops during busbar welding.

[0008] The busbar is placed in the busbar feeding station during the time when the flow line type transmission mechanism stops during busbar feeding, and the contact part of the busbar and the photovoltaic cell string on the busbar welding station is welded by a welding mechanism when the busbar and the photovoltaic cell string exist on the busbar welding station during the time when the flow line type transmission mechanism stops during busbar welding.

[0009] In a second aspect, the present application provides a pipeline type solar photovoltaic cell string busbar welding machine, which applies the pipeline type solar photovoltaic cell string busbar welding method to weld the busbar of the solar photovoltaic cell string.

[0010] Compared with the prior art, the present application has the following advantages:

[0011] The present application provides a pipeline type solar photovoltaic cell string busbar welding method and welding machine. The pipeline type transmission mechanism is provided, which includes a busbar feeding station and a busbar welding station. The transmission stop time of the pipeline type transmission mechanism is preset, which includes the time when the pipeline type transmission mechanism stops during busbar feeding and the time when the pipeline type transmission mechanism stops during busbar welding. The busbar is placed in the busbar feeding station during the time when the pipeline type transmission mechanism stops during busbar feeding. When the busbar welding station has the photovoltaic cell string and the busbar during the time when the pipeline type transmission mechanism stops during busbar welding, the contact parts of the photovoltaic cell string and the busbar in the busbar welding station are welded by the welding mechanism. The mechanisms in different stations do not affect each other, and independently complete their own operations, which greatly improves the welding efficiency of the busbar and the cell string. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings, which are not necessarily drawn to scale, like reference numerals describe similar components throughout the several views. The specific embodiments of the present application will now be described with reference to the drawings:

[0013] Figure 1 is a flowchart of a pipeline type solar photovoltaic cell string busbar welding method according to an embodiment of the present application;

[0014] Figure 2 is a structural schematic diagram of a pipeline type solar photovoltaic cell string busbar welding machine according to an embodiment of the present application;

[0015] Figure 3 is a structural schematic diagram of a bent busbar feeding mechanism according to an embodiment of the present application;

[0016] Figure 4 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 application;

[0017] Figure 5 is a structural schematic diagram of the busbar feeding mechanism of the embodiment of the present application;

[0018] Figure 6 is a state comparison schematic diagram of the cycle feeding of the photovoltaic cell string feeding mechanism of the embodiment of the present application;

[0019] Figure 7 is a structural schematic diagram of the material box taking mechanical hand of the embodiment of the present application;

[0020] Figure 8 is a structural schematic diagram of the cell string feeding mechanical hand of the embodiment of the present application;

[0021] Figure 9 is a structural schematic diagram of the cell string alignment mechanism of the embodiment of the present application;

[0022] Figure 10 is a structural schematic diagram of the automatic EL testing mechanism of the embodiment of the present application;

[0023] Figure 11 is a state schematic diagram of the busbar unloading mechanism after placing the busbar and leaving the assembly line type transmission mechanism of the embodiment of the present application;

[0024] Figure 12 is a structural schematic diagram of the isolation piece attaching mechanism of the embodiment of the present application.

[0025] Legend of reference signs:

[0026] 1, assembly line type transmission mechanism; 110, straight busbar feeding station; 111, bent busbar feeding station; 12, photovoltaic cell string feeding station; 130, bent busbar welding station; 131, straight busbar welding station; 14, cell string assembly discharging station;

[0027] 20, straight busbar feeding mechanism; 201, busbar welding roll feeding mechanism; 202, busbar feeding detection mechanism; 203, flux feeding mechanism; 204, straight busbar cutting mechanism; 205, straight busbar pulling mechanical hand; 206, straight busbar drying device; 21, bent busbar feeding mechanism; 210, feeding mechanism; 211, bending forming mechanism; 212, shearing mechanism; 213, taking and placing 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;

[0028] 3, photovoltaic cell string feeding mechanism; 30, feeding transmission mechanism; 31, discharging transmission mechanism; 32, material box transfer lifting mechanism;

[0029] 40, bending busbar welding mechanism; 41, straight busbar welding mechanism; 42, busbar unloading mechanism; 420, suction nozzle;

[0030] 5, isolation piece attaching mechanism; 50, isolation piece supply cutting mechanism; 51, isolation piece suction attaching mechanism;

[0031] 60, large glass automatic feeding mechanism; 61, manual EVA laying transmission mechanism; 62, large glass EVA assembly transmission mechanism; 63, large glass EVA assembly alignment steering mechanism;

[0032] 70, large and small glass EVA assembly conveying mechanism; 71, small glass EVA assembly manual feeding station; 72, large and small glass EVA assembly alignment steering and correcting mechanism; 720, large and small glass EVA assembly conveyor belt conveying mechanism; 721, large and small glass EVA assembly lifting and aligning mechanism; 73, automatic EL testing mechanism; 74, automatic EVA glass assembly fixing mechanism; 75, NG battery string conveying mechanism;

[0033] 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 end alignment correction assembly. DETAILED DESCRIPTION

[0034] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0035] Embodiment one

[0036] Referring to Figures 1-12 , the present embodiment provides a flow line type solar photovoltaic cell string busbar welding method, comprising the following steps:

[0037] S101, a flow line type transmission mechanism 1 is provided, the flow line type transmission mechanism 1 comprising a busbar feeding station and a busbar welding station;

[0038] S103, preset the transmission stop time of the flow line type transmission mechanism 1, the transmission stop time comprising the time when the flow line type transmission mechanism stops during busbar feeding and the time when the flow line type transmission mechanism stops during busbar welding;

[0039] S105, placing the busbar on the busbar feeding station at the time when the assembly line transmission mechanism stops feeding the busbar, when the busbar welding station has the photovoltaic cell string and the busbar at the time when the assembly line transmission mechanism stops during the busbar welding, welding the contact part of the photovoltaic cell string and the busbar on the busbar welding station by the welding mechanism. Wherein the photovoltaic cell string on the busbar welding station can be a single cell string, or a plurality of cell strings. When there are a plurality of photovoltaic cell strings on the busbar welding station, the plurality of photovoltaic cell strings can be in series, parallel, or series-parallel. The busbar on the busbar welding station can also include different numbers of busbars, and the form of the busbar can also include a plurality of different forms. For example, there can be a plurality of straight busbars on the busbar welding station, or a plurality of busbars in the shape of a bend. The busbar welding station can include straight busbars and busbars in the shape of a bend, and the straight busbars and busbars in the shape of a bend can be distributed on the same end or different ends of the photovoltaic cell string.

[0040] It should be noted that in the embodiment, by setting the pipeline transmission mechanism 1, the pipeline transmission mechanism 1 includes the busbar feeding station and the busbar welding station, the transmission stop time of the pipeline transmission mechanism 1 is preset, the transmission stop time includes the time when the pipeline transmission mechanism stops during the busbar feeding and the time when the pipeline transmission mechanism stops during the busbar welding, the busbar is placed in the busbar feeding station during the time when the pipeline transmission mechanism stops during the busbar feeding, and the photovoltaic cell string and the busbar exist in the busbar welding station during the time when the pipeline transmission mechanism stops during the busbar welding, the contact parts of the photovoltaic cell string and the busbar in the busbar welding station are welded by the welding mechanism, the mechanisms of different stations do not affect each other, and the operations of the mechanisms are independently completed, so that the welding efficiency of the busbar and the cell string welding is greatly improved. In step S101, the production process is designed into a pipeline mode, and the feeding and welding of the busbar are divided into independent stations on the pipeline transmission mechanism. In this way, the mechanisms for feeding and welding the busbar can independently perform their own operations, reduce the waiting time, and improve the welding efficiency. In step S103, the stop time of the transmission mechanism is preset to ensure that each station has enough time to complete its own task. The two types of time, the time when the pipeline transmission mechanism stops during the busbar feeding and the time when the pipeline transmission mechanism stops during the busbar welding, are clearly allocated to avoid waiting between stations, ensure that the operation of the mechanism of each station has high time accuracy, avoid time conflicts between the mechanisms of each station, and thus reduce operation waiting. In step S105, after the feeding station places the busbar, the busbar is transmitted to the welding station, while ensuring that the busbar and the photovoltaic cell string are in stable contact at the welding station, and the welding mechanism is used to weld the contact parts, so as to eliminate the situation that the previous station needs to wait for the next station to complete the operation in the sequencing welding, and improve the utilization rate of the welding station. It should be noted that in the embodiment, the transmission stop time of the pipeline transmission mechanism 1 can refer to the time when the pipeline transmission mechanism 1 stops transmission, or can refer to the waiting time when the pipeline transmission mechanism 1 adjusts the transmission speed to a slow waiting state.

[0041] In some preferred embodiments, the pipeline transmission mechanism 1 further comprises a photovoltaic cell string feeding station 12, and the transmission stop time further comprises the time when the pipeline transmission mechanism stops during feeding of the photovoltaic cell string; the time when the pipeline transmission mechanism stops during feeding of the photovoltaic cell string places the photovoltaic cell string to the photovoltaic cell string feeding station 12. Exemplarily, the photovoltaic cell string feeding station 12 is upstream or downstream of the busbar feeding station. Exemplarily, the photovoltaic cell string feeding station is upstream or downstream of the straight busbar feeding station and the bent busbar feeding station. Optionally, the busbar feeding station can separately comprise a straight busbar feeding station 110 or a bent busbar feeding station 111.

[0042] Preferably, the busbar feeding station comprises a straight busbar feeding station 110 and a bent busbar feeding station 111, and the straight busbar feeding station 110 is upstream or downstream of the bent busbar feeding station 111. It should be noted that the photovoltaic cell string feeding station 12 can ensure that the photovoltaic cell string and the busbar reach the welding station synchronously or quasi-synchronously, avoid waiting at the welding station, further distribute and optimize the transmission stop time in the pipeline, so that the feeding and transmission time of each stage is reasonably arranged, and the production efficiency of the entire pipeline is improved. In addition, the photovoltaic cell string feeding station 12 can be upstream or downstream of the busbar feeding station. The specific position depends on the needs of the production process, such as selecting upstream to make the photovoltaic cell string ready in advance and stable transmission, or selecting downstream to be more conducive to adjusting the feeding time of the photovoltaic cell string according to the specific state of the busbar feeding, so as to achieve the best cooperation. In addition, the busbar is divided into straight busbar and bent busbar feeding stations 111, which can meet the welding needs of busbars of different shapes, and the feeding station can be flexibly adjusted for busbars of different specifications or designs. It can be understood that in the present embodiment, by increasing different types of feeding stations and reasonably arranging upstream or downstream positions, each type of busbar and photovoltaic cell string can be fed according to the predetermined order and accurately reach the welding station, improving the welding efficiency and reducing the waiting time.

[0043] In some preferred embodiments, the photovoltaic cell string feeding station 12 is located between the straight busbar feeding station 110 and the bent busbar feeding station 111; alternatively, the photovoltaic cell string feeding station 12 is located upstream or downstream of the straight busbar feeding station 110 and the bent busbar feeding station 111. The busbar welding station comprises a bent busbar welding station 130 and a straight busbar welding station 131, the bent busbar welding station 130 is located upstream or downstream of the straight busbar welding station 131; alternatively, the straight busbar welding station and the bent busbar welding station are provided as one welding station. The welding mechanism comprises a bent busbar welding mechanism 40 and a straight busbar welding mechanism 41; the bent busbar welding mechanism 40 is provided at the bent busbar welding station 130, and the straight busbar welding mechanism 41 is provided at the straight busbar welding station 131. The busbar feeding is performed by a busbar feeding mechanism, which comprises a straight busbar feeding mechanism 20 and a bent busbar feeding mechanism 21; the straight busbar feeding mechanism 20 is provided at the straight busbar feeding station 110, and the bent busbar feeding mechanism 21 is provided at the bent busbar feeding station 111. It should be noted that the photovoltaic cell string feeding station 12 is located between the straight busbar feeding station and the bent busbar feeding station 111, which can optimize the connection and transmission of the photovoltaic cell string and the busbar. In this arrangement, the photovoltaic cell string can be flexibly combined with the straight busbar or the bent busbar according to production needs. Since the photovoltaic cell string feeding is located in the middle position, it can balance the time allocation between the upstream and downstream stations, and improve the coordination of production rhythm. It should be noted that the straight busbar and the bent busbar can be welded in the same welding station, but this way can only weld cell strings of the same length. In this embodiment, it is preferred that the bent busbar welding station 130 is located upstream or downstream of the straight busbar welding station 131, which can enhance the flexibility of the production line and adapt to cell strings of different lengths. Preferably, the upstream station can preferentially weld the bent busbar, and then weld the straight busbar. This ordering can be dynamically adjusted according to actual production needs, thereby improving overall production efficiency. In addition, other stations can be provided between the straight busbar welding station and the bent busbar welding station for completing other processes required to be implemented on the assembly line. In addition, independent welding mechanisms are provided for the straight busbar and the bent busbar, respectively, to ensure that each type of busbar has a dedicated welding device. The bent busbar welding mechanism 40 is located on one side of the bent busbar welding station 130, and the straight busbar welding mechanism 41 is located on one side of the straight busbar welding station 131, which avoids mixing different welding processes with the same device, improves welding accuracy, reduces errors and device adjustment time, and makes the welding process more efficient. In addition, by separately providing the feeding mechanisms for the straight busbar and the bent busbar, more efficient feeding operations 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 arranged on one side of the bent busbar feeding station 111, so as to reduce the interference of different busbar types in the feeding process. It can be understood that in the above embodiment, each feeding and welding station can be independently operated without waiting for each other, thereby greatly improving the production capacity of the whole production system.

[0044] In further some preferred embodiments, the straight busbar feeding mechanism 20 is located upstream of the bent busbar feeding mechanism 21, the bent busbar welding mechanism 40 and the straight busbar welding mechanism 41 are located downstream of the bent busbar feeding mechanism 21, the bent busbar welding mechanism 40 is located upstream of the straight busbar welding mechanism 41, one side of the photovoltaic cell string feeding station 12 is provided with a photovoltaic cell string feeding mechanism 3, the photovoltaic cell string feeding mechanism 3 is located upstream of the bent busbar feeding mechanism 21 and downstream of the straight busbar feeding mechanism 20; the straight busbar feeding mechanism 20 places a straight busbar to the straight busbar feeding station 110, after the straight busbar at the straight busbar feeding station 110 is transmitted to the photovoltaic cell string feeding station 12, the photovoltaic cell string feeding mechanism 3 places a photovoltaic cell string to the photovoltaic cell string feeding station 12 so that the cell string end of the photovoltaic cell string is crimped with the straight busbar to obtain a first crimped assembly, the first crimped assembly is transmitted to the bent busbar feeding station 111 to receive the feeding of the bent busbar by the bent busbar feeding mechanism 21 to obtain a second crimped assembly. The second crimped assembly is transmitted to the bent busbar welding station 130 to receive the welding of the bent busbar welding mechanism 40, after the welded second crimped assembly is transmitted to the straight busbar welding station 131, it receives the welding of the straight busbar welding mechanism 41, so that the straight busbar of the second crimped assembly and the first contact position of the cell string end of the photovoltaic cell string are welded, and the bent busbar of the second crimped assembly and the second contact position of the cell string end of the photovoltaic cell string are welded. In this embodiment, the straight busbar welding station 131 is located downstream of the bent busbar welding station 130, the bent busbar of the second crimped assembly and the contact position of the cell string end of the photovoltaic cell string are welded first, and then the straight busbar of the second crimped assembly and the contact position of the cell string end of the photovoltaic cell string are welded. It should be noted that in this embodiment, by placing the straight busbar feeding mechanism 20 upstream of the bent busbar feeding mechanism 21 and reasonably arranging the downstream positions of the welding mechanisms, the smoothness and efficiency of the production line can be ensured, thereby reducing the waiting time and conflicts between processes and improving the overall production efficiency. In addition, the photovoltaic cell string feeding mechanism 3 is located upstream of the bent busbar feeding mechanism 21 and downstream of the straight busbar feeding mechanism 20, which ensures that the photovoltaic cell string and the straight busbar can be synchronized or quasi-synchronized to reach the welding station, avoiding the waiting time of the welding station and further improving the production efficiency. In addition, in this embodiment, the crimping and welding are carried out in steps, first forming a first crimped assembly (crimping of the straight busbar and the photovoltaic cell string), then forming a second crimped assembly (adding crimping of the bent busbar based on the first crimped assembly), and finally welding the two contact positions respectively, which helps to ensure the accuracy and quality of welding and reduce welding defects.The independent welding mechanisms are respectively arranged for the straight bus bars and the bent bus bars, so as to avoid the mixed use of the equipment with different welding processes, and to improve the precision and efficiency of welding. In the embodiment, the order of the bent bus bar welding station 130 and the straight bus bar welding station 131 can be flexibly adjusted according to the production requirements, which is helpful to adapt to different production requirements and product specifications, and to enhance the adaptability and competitiveness of the production line. In addition, each feeding and welding station can be independently operated without waiting for the completion of operation of other stations, so as to improve the production capacity and efficiency of the production system. It should be noted that in actual production, the bent bus bar can be fed first and then welded, and then the straight bus bar can be fed and welded; or the straight bus bar can be fed first and then welded, and then the bent bus bar can be fed and welded.

[0045] In further some preferred embodiments, the bent busbar feeding mechanism 21 comprises a tape feeding mechanism 210, a bending forming mechanism 211, a taking and placing mechanism 213, and a shearing mechanism 212. The tape feeding mechanism 210 is located at one side of the bending forming mechanism 211, the shearing mechanism 212 is located at the other side of the bending forming mechanism 211, and the taking and placing mechanism 213 is located at one side of the bending forming mechanism 211. The busbar provided by the tape feeding mechanism 210 is bent by the bending forming mechanism 211 to obtain a busbar with a bent part. The busbar with the bent part is sheared by the shearing mechanism 212 and then taken and placed by the taking and placing 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 feeding mechanism 21 comprises a left L-shaped busbar feeding mechanism 214 and a right L-shaped busbar feeding mechanism 215. With reference to the transmission direction of the flow line type transmission mechanism 1, the left L-shaped busbar feeding mechanism and the right L-shaped busbar feeding mechanism are located at the left side and the right side of the flow line type transmission mechanism 1, respectively. The left L-shaped busbar feeding mechanism 214 can be provided with a left L-shaped busbar drying device 2140 to dry the flux on the left L-shaped busbar. The right L-shaped busbar feeding mechanism 215 can be provided with a right L-shaped busbar drying device 2150 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 feed, the contact state of the busbar and the battery string is that the bent opening direction of a piece of busbar is towards the left side of the battery string end, that is, the left L-shaped busbar, and the bent opening direction of a piece of busbar is towards the right side of the battery string end, that is, the right L-shaped busbar. In addition, the straight busbar feeding mechanism 20 can comprise a straight busbar welding roll feeding mechanism 201, a busbar feeding detection mechanism 202, a flux feeding mechanism 203, a straight busbar cutting mechanism 204, a straight busbar pulling mechanical hand 205, and a straight busbar drying device 206. The straight busbar welding roll feeding mechanism 201 provides a busbar tape. 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 tape. The busbar feeding detection mechanism 202 detects the presence or absence of the busbar tape. The flux feeding mechanism 203 provides flux for the busbar tape. The straight busbar drying device 206 dries the flux on the busbar tape. The straight busbar cutting mechanism 204 cuts the busbar tape containing flux, which is taken away by the straight busbar pulling mechanical hand 205 and fed to the feeding position of the straight busbar. The feeding position of the straight busbar can be a selected position on the transmission belt of the flow line type transmission mechanism 1 or a set position outside the flow line type transmission mechanism 1. When the straight busbar is fed to the selected position on the transmission belt of the flow line type transmission mechanism 1, there can be two feeding modes.The first mode is that the selected position of the conveying belt of the pipeline conveying mechanism 1 is used as the busbar feeding station 110, and the busbar is fed to the selected position of the conveying belt of the pipeline conveying mechanism 1 to complete the feeding. The second mode is that the busbar is taken away from the selected position of the conveying belt of the pipeline conveying mechanism 1 by the busbar unloading mechanism 42, and then fed to the busbar feeding station 110. When the busbar is fed to the set position outside the pipeline conveying mechanism 1, the busbar is taken away from the set position outside the pipeline conveying mechanism 1 by the busbar unloading mechanism 42, and then fed to the busbar feeding station 110. It should be noted that the busbar drying device 206 is arranged on the busbar feeding mechanism 20 to dry the flux provided by the flux feeding mechanism 203 for the busbar strip, so that the flux is dried during the feeding of the busbar, and the efficiency of the busbar feeding is greatly improved.

[0046] In further embodiments, the photovoltaic cell string feeding mechanism 3 can include a feeding conveying mechanism 30, a discharging conveying mechanism 31, and a box transfer lifting mechanism 32. The feeding conveying mechanism 30 is located on one side of the discharging conveying mechanism 31, and the box transfer lifting mechanism 32 is located on the same side of the feeding conveying mechanism 30 and the discharging conveying mechanism 31. The box transfer lifting mechanism 32 lifts and transfers the cell string box, so that after the cell string in the cell string box loaded on the discharging conveying mechanism 31 is taken away by the box feeding manipulator, the unloaded cell string box is transferred to the feeding conveying mechanism 30 to receive the loading of the cell string, and the cell string loaded box is transferred to the box transfer lifting mechanism 32 through the feeding conveying mechanism 30. It should be noted that in the present embodiment, the feeding conveying mechanism 30, the discharging conveying mechanism 31, and the box transfer lifting mechanism 32 can process multiple boxes at the same time. Since the box transfer lifting mechanism 32 lifts and transfers the cell string box, so that after the cell string in the cell string box loaded on the discharging conveying mechanism 31 is taken away by the box feeding manipulator, the unloaded cell string box is transferred to the feeding conveying mechanism 30 to receive the loading of the cell string, and the cell string loaded box is transferred to the box transfer lifting mechanism 32 through the feeding conveying mechanism 30, the photovoltaic cell string feeding mechanism 3 can circulate the box conveying, so that the box feeding manipulator continuously takes away the photovoltaic cell string in the box, and high-efficiency feeding is realized.

[0047] In further some preferred embodiments, the cell string alignment mechanism 8 is used to align the photovoltaic cell string to generate a cell string reference position after the cell string is taken out of the magazine by the magazine taking robot, and the cell string is placed to the photovoltaic cell string loading station 12 by the cell string loading robot. Further, the cell string alignment mechanism 8 comprises a cell string alignment correction mechanism 80, a string-to-string baffle 81, a cell string side edge alignment correction assembly 82, and a cell end alignment correction assembly 83; the string-to-string baffle 81 and the cell string side edge alignment correction assembly 82 are arranged in parallel on the cell string alignment correction mechanism 80 to form a cell string alignment mechanism with cell string long edge alignment function and different cell string separation function on the cell string alignment correction mechanism 80, and the end of the cell string alignment mechanism is provided with the cell end alignment correction assembly 83 which contacts the short edge of the cell string to be aligned and corrects the short edge of the cell string. It is to be noted that, in the present embodiment, the string-to-string baffle 81 and the cell string side edge alignment correction assembly 82 are arranged in parallel on the cell string alignment correction mechanism 80 to form a cell string alignment mechanism with cell string long edge alignment function and different cell string separation function on the cell string alignment correction mechanism 80, and the end of the cell string alignment mechanism is provided with the cell end alignment correction assembly 83 which contacts the short edge of the cell string to be aligned and corrects the short edge of the cell string, so that the cell string loading robot can take the cell string after alignment to generate a cell string reference position and place it to the photovoltaic cell string loading station 12, and the transmission cycle of the assembly line transmission mechanism 1 is designed based on the reference position.

[0048] In some preferred embodiments, the bus bar feeding mechanism is used to place the bus bar on the corresponding flow line conveyor belt of the bus bar feeding station when the flow line conveying mechanism stops during the feeding of the bus bar. The bus bar feeding mechanism comprises a bus bar unloading mechanism 42, which comprises a suction nozzle 420 connected to a negative pressure source. When the bus bar is placed on the flow line conveyor belt, the flow line conveyor belt is in a stationary state, the suction nozzle 420 adsorbs the bus bar and presses the adsorbed bus bar to contact the surface of the flow line conveyor belt, and then lifts the bus bar away from the flow line conveyor belt after the negative pressure in the negative pressure source is cancelled. It should be noted that in the prior art, when the suction nozzle 420 unloads the adsorbed bus bar, the bus bar is not pressed to the surface of the placement position, and the unloaded bus bar often falls onto the surface of the placement position. Since the bus bar is very light, it is easy to cause the bus bar to be not accurately placed on the placement position due to the disappearance of air and negative pressure suction force, and the collision with the placement position, etc. In the present embodiment, since the bus bar is placed on the flow line conveyor belt, the flow line conveyor belt is in a stationary state, the suction nozzle 420 adsorbs the bus bar and presses the adsorbed bus bar to contact the surface of the flow line conveyor belt, and then lifts the bus bar away from the flow line conveyor belt after the negative pressure in the negative pressure source is cancelled. Therefore, the bus bar can be accurately placed, and the other stations on the flow line conveying mechanism 1 are not affected by the placement deviation of the bus bar, thereby improving the quality of the finished products of the production line. It should be understood that in the present embodiment, the suction nozzle 420 can be a standard suction nozzle 420 or a self-made suction nozzle 420 according to actual needs.

[0049] In some preferred embodiments, an isolation piece attaching mechanism 5 is arranged on one side of the flow line conveying mechanism 1, which attaches the isolation piece to the bus bar isolation position on the surface of the photovoltaic cell string. It should be noted that the attachment of the isolation piece to the bus bar isolation position on the surface of the photovoltaic cell string can prevent the bus bar from contacting the surface of the photovoltaic cell string and causing short circuit. In addition, since the photovoltaic cell string is fragile, the isolation piece can act as a buffer between the surface of the photovoltaic cell string and the bus bar to protect the photovoltaic cell string. In addition, according to actual conditions, when the isolation piece is attached to the bus bar isolation position on the surface of the adjacent different photovoltaic cell string, it can also act as a limiting position for the adjacent different photovoltaic cell string to avoid the position deviation between the different photovoltaic cell strings. In some preferred embodiments, the isolation piece attaching mechanism 5 comprises an isolation piece feeding and cutting mechanism 50 and an isolation piece suction and attaching mechanism 51. The isolation piece feeding and cutting mechanism 50 is arranged on one side of the isolation piece suction and attaching mechanism 51, which is used to provide the isolation piece and cut the isolation piece to the required length, and the isolation piece suction and attaching mechanism 51 suctions and attaches the cut isolation piece to the bus bar isolation position on the surface of the photovoltaic cell string.

[0050] In further preferred embodiments, when the isolation piece attaching mechanism 5 is set, the straight busbar feeding mechanism 20 is located upstream of the bent busbar feeding mechanism 21, and the welding mechanism is located downstream of the bent busbar feeding mechanism 21; the straight busbar feeding mechanism 20 places a straight busbar on the straight busbar feeding station 110, after the straight busbar on the straight busbar feeding station 110 is transferred to the photovoltaic cell string feeding station 12, the photovoltaic cell string feeding mechanism 3 places a photovoltaic cell string on the photovoltaic cell string feeding station 12 so that the cell string end of the photovoltaic cell string is crimped with the straight busbar to obtain a first crimped assembly, the isolation piece attaching mechanism 5 attaches an isolation piece to the busbar isolation position on the surface of the photovoltaic cell string of the first crimped assembly, after the first crimped assembly with the attached isolation piece is transferred to the bent busbar feeding station 111, the bent busbar feeding mechanism 21 places a bent busbar on the bent busbar feeding station 111 so that the bent busbar crimps the cell string end of the photovoltaic cell string of the first crimped assembly to obtain a second crimped assembly which is transferred to the busbar welding station, and the welding mechanism welds the contact position of the photovoltaic cell string and the busbar on the busbar welding station. It should be noted that the isolation pieces play a crucial role in the production of photovoltaic cell strings, they are used to prevent short circuits between busbars, protect the cell string from external environment, and improve the safety and reliability of the overall assembly. In this embodiment, considering that if the bent busbar is fed first, the bent busbar will block the busbar isolation position, resulting in the isolation piece being unable to be correctly attached. Therefore, in this embodiment, the straight busbar is first processed and placed on the straight busbar feeding station 110, after the straight busbar and the photovoltaic cell string are preliminarily crimped and form a first crimped assembly, the isolation piece is attached, and then the bent busbar is fed, ensuring that the isolation piece can be correctly attached before the bent busbar is fed. Alternatively, the isolation piece can also be attached after the cell string alignment correction mechanism 80 completes the alignment.

[0051] In some preferred embodiments, the pipeline transmission mechanism 1 further comprises a battery string assembly discharge station 14, the battery string assembly being an assembly formed by the busbar and the photovoltaic battery string after the busbar is welded to the photovoltaic battery string; the transmission stop time further comprises the time when the pipeline transmission mechanism stops during the discharge of the battery string assembly; the time when the pipeline transmission mechanism stops during the discharge of the battery string assembly is the time when the battery string assembly is taken away from the battery string assembly discharge station. It should be noted that the provision of the discharge station enables the battery string assembly after welding to be directly removed from the discharge station after production is completed, thereby reducing the idle time of the production line. In addition, the inclusion of the battery string assembly discharge time in the transmission stop time enables the working timing of each station to be accurately controlled, thereby ensuring that the feeding, welding and discharging are orderly carried out in the pipeline. The addition of the discharge time helps to form a complete time closed loop in each cycle, thereby ensuring that the assembly is discharged and space is vacated within a predetermined time node, so that a new photovoltaic battery string enters the welding station, so that each production step has a clear time constraint, thereby avoiding a chain reaction due to step delay, and further improving production efficiency. In addition, the provision of the discharge station also facilitates quality inspection and management of the finished assembly. Each welded assembly can be fully inspected at the discharge station, thereby ensuring that the welding quality meets the requirements. If a problem is found at this stage, the assembly can be timely reworked, thereby avoiding flowing into the next link.

[0052] In further some preferred embodiments, a large glass automatic feeding mechanism 60, a manual EVA laying transmission mechanism 61, a large glass EVA assembly transmission mechanism 62, a large glass EVA assembly alignment steering mechanism 63, a large and small glass EVA assembly conveying mechanism 70 and a large and small glass EVA assembly alignment steering and correcting mechanism 72 are arranged on one side of the battery string assembly discharge station 14; the large glass automatic feeding mechanism 60, the manual EVA laying transmission mechanism 61, the large glass EVA assembly transmission mechanism 62 and the large glass EVA assembly alignment steering mechanism 63 are sequentially arranged to form a large glass EVA assembly processing line; the large and small glass EVA assembly conveying mechanism 70 is located on the discharge side of the large glass EVA assembly alignment steering mechanism 63, one side of the large and small glass EVA assembly conveying mechanism 70 is provided with a small glass EVA assembly manual feeding station 71, and the large and small glass EVA assembly alignment steering and correcting mechanism 72 is located on the discharge side of the large and small glass EVA assembly conveying mechanism 70; the processing of large glass EVA assemblies and small glass EVA assemblies is alternatively performed, the large glass EVA assembly processing line stops working when the small glass EVA assembly manual feeding station performs manual feeding of small glass EVA assemblies, the small glass EVA assembly manual feeding station stops manual feeding when the large glass EVA assembly processing line works; after the large and small glass EVA assembly alignment steering and correcting mechanism 72 completes alignment and correction of large glass EVA assemblies or small glass EVA assemblies, the battery string assembly discharged by the battery string assembly discharge station 14 is discharged onto the aligned and corrected glass EVA assemblies; or, the aligned and corrected glass EVA assemblies are transmitted to a designated suitable position, the battery string assembly discharged by the battery string assembly discharge station 14 is discharged onto the glass EVA assemblies on the designated suitable position to obtain battery string glass EVA assemblies to be detected. When the large and small glass EVA assembly alignment steering and correcting mechanism 72 performs alignment and correction of large glass EVA assemblies or small glass EVA assemblies, two alignment modes, i.e., alignment mode one and alignment mode two, are included. In alignment mode one, the large and small glass EVA assembly alignment steering and correcting mechanism 72 is in an ascending position, and when large glass EVA assemblies or small glass EVA assemblies are transmitted to one side of the large and small glass EVA assembly alignment steering and correcting mechanism 72 in the ascending position, the large and small glass EVA assembly alignment steering and correcting mechanism 72 completes alignment of the large glass EVA assemblies or small glass EVA assemblies. In alignment mode two, the large and small glass EVA assembly alignment steering and correcting mechanism 72 is in a descending position, large glass EVA assemblies or small glass EVA assemblies pass over the large and small glass EVA assembly alignment steering and correcting mechanism 72 in the descending position, the large and small glass EVA assembly alignment steering and correcting mechanism 72 in the descending position is raised, and the large glass EVA assemblies or small glass EVA assemblies are reversely transmitted to be close to the large and small glass EVA assembly alignment steering and correcting mechanism 72 to complete alignment.The size glass EVA assembly alignment steering and correcting mechanism 72 is lowered after alignment by alignment mode one or alignment mode two. It should be noted that in the embodiment, since the processing of the large glass EVA assembly and the small glass EVA assembly is alternatively performed, when the small glass EVA assembly manual loading station is loading the small glass EVA assembly, the large glass EVA assembly processing production line stops, and when the large glass EVA assembly processing production line is operating, the small glass EVA assembly manual loading station stops manual loading. Therefore, the processing of the large glass EVA assembly and the small glass EVA assembly can be combined, which greatly saves costs and provides users with multiple processing options for glass EVA assemblies. The size glass EVA assembly conveying mechanism 70 and the size glass EVA assembly alignment steering and correcting mechanism 72 can process the large glass EVA assembly or the small glass EVA assembly separately, which not only greatly saves costs, but also greatly reduces the space occupied by the welding production line, making it easier for users to install and use. Further, the size glass EVA assembly alignment steering and correcting mechanism 72 includes a size glass EVA assembly conveyor belt transportation mechanism 720 and a size glass EVA assembly lifting and aligning mechanism 721. The size glass EVA assembly lifting and aligning mechanism is located on the discharge side of the size glass EVA assembly conveying mechanism 70, between the size glass EVA assembly conveying mechanism 70 and the size glass EVA assembly conveyor belt transportation mechanism. The size glass EVA assembly conveyor belt transportation mechanism contacts the size glass EVA assembly lifting and aligning mechanism when lifting the large glass EVA assembly or the small glass EVA assembly, thereby aligning and correcting the large glass EVA assembly or the small glass EVA assembly. It should be noted that according to actual needs, a mechanism and process for processing the large glass EVA assembly can also be separately provided, or a mechanism and process for processing the small glass EVA assembly can also be separately provided.

[0053] In further some preferred embodiments, the automatic EL testing mechanism 73, the NG battery string conveying mechanism 75 and the automatic EVA glass assembly fixing mechanism 74 are respectively arranged at different positions of the output direction of the size glass EVA assembly alignment steering and correcting mechanism 72; the size glass EVA assembly alignment steering and correcting mechanism 72 transmits the battery string glass EVA assembly to be detected to one side of the automatic EL testing mechanism 73 to accept EL testing, the qualified battery string glass EVA assembly after testing is conveyed to the automatic EVA glass assembly fixing mechanism 74 to fix the EVA encapsulation film, and the NG battery string glass EVA assembly after testing fails is conveyed out by the NG battery string conveying mechanism 75 to be repaired. It should be noted that the EL testing (Electroluminescence Testing) can detect defects of welding or the assembly itself, such as cracks or short circuit problems, so as to separate the unqualified battery string assembly in time to be repaired, avoid the unqualified product into the next process, and improve the yield. After detection, the qualified assembly directly enters the EVA encapsulation film fixing process, which can ensure the smooth connection of the process. The EVA encapsulation film is an important protective material of the photovoltaic assembly, and the fixing quality is crucial to the durability and reliability of the finished product. Directly conveying the qualified assembly to the EVA fixing station can avoid damage of the battery string assembly after testing due to multiple handling, and ensure that the encapsulation and fixing are performed immediately after the quality detection is qualified, thereby reducing the process problems caused by delay. It can be understood that in the embodiment, the size glass EVA assembly alignment steering and correcting mechanism 72 transmits the battery string glass EVA assembly to be detected to one side of the automatic EL testing mechanism 73 to accept EL testing, the qualified battery string glass EVA assembly after testing is conveyed to the automatic EVA glass assembly fixing mechanism 74 to fix the EVA encapsulation film, and the NG battery string glass EVA assembly after testing fails is conveyed out by the NG battery string conveying mechanism 75 to be repaired, which can form a complete quality control and encapsulation process, realize the automation closed loop from assembly welding, detection to encapsulation, and ensure that each product can pass through strict detection and encapsulation steps, so that the whole production process is efficient and reliable. The automatic EL testing mechanism 73 can test the battery string glass EVA assembly to be detected through an automatic EL testing needle and an imaging system.

[0054] Embodiment Two

[0055] Reference Figures 1-12 On the basis of the above embodiments, the embodiment provides a flow line type solar photovoltaic battery string busbar welding machine, which applies the flow line type solar photovoltaic battery string busbar welding method of any one of the above embodiments to weld the busbar of the solar photovoltaic battery string.

[0056] The above embodiments are merely preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. The protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for welding busbars in a streamlined solar photovoltaic cell string, characterized in that, include: A production line-type conveyor mechanism is provided, which includes a busbar loading station and a busbar welding station; The preset transmission stop time of the assembly line type transmission mechanism includes the time when the assembly line type transmission mechanism stops during busbar feeding and the time when the assembly line type transmission mechanism stops during busbar welding; When the busbar is being fed, the assembly line conveyor stops and a busbar is placed at the busbar feeding station. When the assembly line conveyor stops and a photovoltaic cell string and a busbar are present at the busbar welding station, the contact parts of the photovoltaic cell string and the busbar at the busbar welding station are welded by the welding mechanism. The busbar feeding and welding mechanisms operate independently, with each feeding and welding station running independently. By pre-setting the stop time of the transmission mechanism, it is ensured that each station has enough time to complete its task, avoiding waiting between stations. The assembly line-type transmission mechanism also includes a photovoltaic cell string loading station. After the photovoltaic cell string is taken out of the material box, it is transported to the cell string alignment mechanism for alignment to generate a reference position of the cell string. The aligned cell string is then taken out and placed at the photovoltaic cell string loading station. The assembly line-type conveying mechanism also includes a battery string assembly unloading station. The battery string assembly is an assembly formed by welding the busbar to the photovoltaic cell string and the photovoltaic cell string. The battery string assembly taken by the battery string assembly unloading station is dropped onto the aligned and corrected glass EVA assembly. Alternatively, the aligned and corrected glass EVA assembly is conveyed to a designated suitable position, and the battery string assembly taken by the battery string assembly unloading station is dropped onto the glass EVA assembly at the designated suitable position.

2. The method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 1, characterized in that, The transmission stop time also includes the time during which the assembly line transmission mechanism stops when the photovoltaic cell string is being fed; during the time during which the assembly line transmission mechanism stops when the photovoltaic cell string is being fed, the photovoltaic cell string is placed at the photovoltaic cell string feeding station; The photovoltaic cell string feeding mechanism includes a feeding conveying mechanism, a discharging conveying mechanism, and a material box transfer and lifting mechanism; the feeding conveying mechanism is located on one side of the discharging conveying mechanism, and the material box transfer and lifting mechanism is located on one side of both the feeding conveying mechanism and the discharging conveying mechanism.

3. The method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 1, characterized in that, The transmission stop time also includes the time during which the assembly line conveyor stops when the battery string assembly is discharged; the battery string assembly is removed from the battery string assembly discharge station during the time during which the assembly line conveyor stops when the battery string assembly is discharged; a large glass EVA assembly processing line and a small glass EVA assembly loading station are set up at the battery string assembly discharge station, and the processing of the large glass EVA assembly processing line and the small glass EVA assembly loading station can be carried out by one of them.

4. The method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 1, characterized in that, The photovoltaic cell string loading station is located upstream or downstream of the busbar loading station.

5. The method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 1, characterized in that, The busbar loading station includes a straight busbar loading station and a bent busbar loading station, with the straight busbar loading station located upstream or downstream of the bent busbar loading station.

6. The method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 5, characterized in that, The photovoltaic cell string loading station is located between the straight busbar loading station and the bent busbar loading station, or the photovoltaic cell string loading station is located upstream or downstream of the straight busbar loading station and the bent busbar loading station.

7. The method for welding busbars of a streamlined solar photovoltaic cell string as described 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 method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 7, characterized in that, The welding mechanism includes a straight busbar welding mechanism and a bent busbar welding mechanism; the straight busbar welding mechanism is located at the straight busbar welding station, and the bent busbar welding mechanism is located at the bent busbar welding station.

9. The method for welding busbars of a streamlined solar photovoltaic cell string as described in claim 5, characterized in that, The busbar is fed through a busbar feeding mechanism, which includes a straight busbar feeding mechanism and a bent busbar feeding mechanism. The straight busbar feeding mechanism is located at the straight busbar feeding station, and the bent busbar feeding mechanism is located at the bent busbar feeding station.

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

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