CN117438504B - Interconnection method and interconnection system for photovoltaic cells without main grid - Google Patents
Interconnection method and interconnection system for photovoltaic cells without main grid Download PDFInfo
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- CN117438504B CN117438504B CN202311682954.0A CN202311682954A CN117438504B CN 117438504 B CN117438504 B CN 117438504B CN 202311682954 A CN202311682954 A CN 202311682954A CN 117438504 B CN117438504 B CN 117438504B
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- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000003466 welding Methods 0.000 claims abstract description 195
- 239000002390 adhesive tape Substances 0.000 claims abstract description 183
- 239000002131 composite material Substances 0.000 claims abstract description 134
- 239000000463 material Substances 0.000 claims abstract description 72
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- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 238000010415 tidying Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 19
- 238000003825 pressing Methods 0.000 description 70
- 229910000679 solder Inorganic materials 0.000 description 38
- 230000009471 action Effects 0.000 description 27
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to the technical field of automatic assembly of photovoltaic modules, and provides an interconnection method and an interconnection system of photovoltaic cells without main grids, wherein the method comprises the following steps: s1: placing a first adhesive tape group at the starting end of a material receiving platform; s2: placing the second section of the first tape set over the first tape set; s3: placing a first battery piece above a first tape group; s4: preparing a first pre-composite part and placing a first adhesive tape group at a station downstream of a last battery piece; s5: attaching the first pre-composite to the upper part of the upper cell; s6: placing a battery piece at a downstream station; s7: and repeating S4 to S6 until the placement of the last battery piece is completed. The welding strip is adhered to the surface of the battery piece, so that the welding strip and the battery piece are adhered to each other, the traditional infrared thermal welding is replaced, and related processes are improved.
Description
Technical Field
The invention relates to the technical field of automatic assembly of photovoltaic modules, in particular to an interconnection method and an interconnection system of photovoltaic cells without main grids.
Background
The photovoltaic panel of the photovoltaic module is formed by mutually connecting and splicing a plurality of battery strings through bus bars, the battery strings are formed by mutually connecting a plurality of battery pieces through welding strips, the connection structure of the battery strings in the current mainstream mainly comprises two types, one type is the battery strings in the IBC structural type and the other type is the battery pieces without the main grid structural type, the welding strips only need to be laid on one side of the battery pieces for the battery strings in the IBC structural type, the welding strips only need to be connected to the back of the adjacent battery piece from the front of one battery piece for the battery pieces without the main grid structural type, and the welding strip heads of the short welding strips need to be leaked on the two battery pieces at the foremost end and the rearmost end respectively so as to be convenient for carrying out welding connection with the bus bars, so that the whole process is more complicated.
At present, the mainstream mode of connecting the welding strip on the battery piece adopts and welds the welding strip on the grid line on the battery piece through infrared welding, and the infrared accuracy requirement of this kind of mode is high, and the heating temperature is difficult to control and leads to influencing the beat, and the solder joint loosens easily, and the thermal expansion shrinkage of welding strip can lead to the atress inhomogeneous etc. of battery piece.
Therefore, there is a need to develop an interconnection method and an interconnection system for photovoltaic cells without main grids, in which a solder strip is adhered to the surface of the photovoltaic cells, so that the solder strip and the photovoltaic cells are adhered to each other, thereby replacing the conventional infrared thermal welding and improving the related process.
Disclosure of Invention
The invention aims to provide an interconnection method and an interconnection system for photovoltaic cells without main grids, which solve the problems of low welding quality and low efficiency, and adhere a welding strip on the surface of the photovoltaic cells so as to bond the welding strip and the photovoltaic cells with each other, thereby replacing the traditional infrared and external thermal welding and improving the related process.
In order to solve the technical problems, as one aspect of the present invention, there is provided an interconnection method of photovoltaic cells without main grid, comprising the following steps:
s1: placing a first adhesive tape group with an upward adhesive surface at the initial end on a material receiving platform, wherein the initial end of the material receiving platform is positioned at the upstream of a battery string;
S2: the first welding strip group comprises a first section and a second section, the second section of the first welding strip group is arranged above the first adhesive tape group, and the first section of the first welding strip group extends out towards the upstream direction of the battery string;
S3: placing a first battery piece above a first tape group;
S4: preparing a first pre-composite part and placing a first adhesive tape group with an upward adhesive surface at a station at the downstream of the last battery piece, wherein the first pre-composite part comprises a second welding band group and a second adhesive tape group, the second welding band group comprises a first section and a second section, the adhesive surface of the second adhesive tape group is downward, the first section of the second welding band group is adhered below the second adhesive tape group, and the second section of the second welding band group extends out towards the downstream direction of the battery string;
S5: attaching a second adhesive tape group of the first pre-composite part above the upper battery piece, wherein a second section of the second adhesive tape group is above the first adhesive tape group of a station at the downstream of the upper battery piece;
s6: placing the battery piece above the first tape group and the second section of the second welding tape group of a station at the downstream of the last battery piece;
S7: and repeating the steps S4 to S6 until the placement of the last battery piece is completed.
According to an example embodiment of the present invention, the interconnection method of the photovoltaic cells without main grid further includes:
s8: preparing a second pre-composite piece, wherein the second pre-composite piece comprises a third welding band group and a second adhesive tape group, the third welding band group comprises a first section and a second section, the adhesive surface of the second adhesive tape group is downward, the first section of the third welding band group is stuck below the second adhesive tape group, the second section of the third welding band group extends out towards the downstream direction of the battery string, and the length of the third welding band group is smaller than that of the second welding band group;
S9: and attaching a second adhesive tape group of the second pre-composite piece above the last battery piece.
According to an exemplary embodiment of the present invention, the step S6 is performed simultaneously with the step S4.
According to an exemplary embodiment of the present invention, in step S4, a method of preparing a first pre-composite includes:
and (3) pulling out the second welding band group to a target length, cutting the welding band group so that the welding band group is positioned on the composite part carrier, and placing the second adhesive tape group above the first section of the second welding band group to form a first pre-composite part.
According to an exemplary embodiment of the present invention, before the battery pieces are placed in step S3 and step S6, the whole battery piece is divided into small battery pieces, and then the battery pieces are arranged.
According to an exemplary embodiment of the invention, a laser scribing method is adopted to divide the whole battery piece into small battery pieces; and (5) carrying out sheet tidying by a rotating method.
According to an exemplary embodiment of the present invention, the first and second tape groups are obtained by pulling out the whole roll of tape, cutting it, and then performing a pitch change.
According to an exemplary embodiment of the present invention, the method of slitting a whole roll of adhesive tape after being pulled out includes pulling out the whole roll of adhesive tape, slitting the adhesive tape from above and/or below the adhesive tape by a plurality of cutters, and slitting the adhesive tape in a direction parallel to the direction in which the adhesive tape is pulled out.
According to an exemplary embodiment of the present invention, the method for performing the pitch change includes guiding the slit tape set to a plurality of guide grooves, and pulling apart a plurality of tapes of the tape set.
As a second aspect of the present invention, the present invention provides an interconnection system for photovoltaic cells without main grids, which comprises a cell feeding mechanism, a cell handling mechanism, a receiving platform, a solder strip composite preparation device, a tape slitting and distance changing mechanism, and a solder strip roll; the tape cutting and distance changing mechanism comprises a first tape cutting and distance changing mechanism and a second tape cutting and distance changing mechanism;
the battery piece feeding mechanism is the same as the battery piece preparation mechanism;
the battery piece carrying mechanism is used for carrying battery pieces to the receiving platform;
the first tape slitting and distance changing mechanism is used for preparing a first tape group, and the adhesive surface of the first tape group faces upwards;
The second tape slitting and distance changing mechanism is used for preparing a second tape group, and the adhesive surface of the second tape group faces downwards;
the welding strip material roll is used for providing a welding strip group;
The welding strip composite part preparation device is used for preparing a first pre-composite part and a second pre-composite part, the first pre-composite part comprises a second adhesive tape group and a second welding tape group, the second welding tape group comprises a first section and a second section, and the adhesive surface of the second adhesive tape group faces downwards; the second adhesive tape group of the first pre-composite piece is attached to the upper part of the upper battery piece, and the second section of the second welding tape group is attached to the upper part of the first adhesive tape group of a station at the downstream of the upper battery piece; the second pre-composite comprises a second adhesive tape group and a third adhesive tape group, the third adhesive tape group comprises a first section and a second section, the adhesive surface of the second adhesive tape group faces downwards, and the first section of the third adhesive tape group is adhered below the second adhesive tape group; the second adhesive tape group of the second pre-composite piece is attached above the last battery piece, the second section of the third welding band group extends out towards the downstream direction of the battery string, and the length of the third welding band group is smaller than that of the second welding band group.
The beneficial effects of the invention are as follows:
The preparation of the pre-composite part and the placement of the battery piece and the lamination of the pre-composite part and the battery piece are performed simultaneously, so that an infrared welding method is avoided, the interconnection efficiency and the connection quality of the battery string are improved, and the method has the following advantages that:
1. the defects of the traditional welding process are overcome, the adhesive tape preparation process is fast, the welding time can be omitted, the influence of temperature on the welding effect is not required to be considered, the process is simple, and the automation efficiency is high;
2. the needed adhesive tape sections are manufactured in a tape cutting mode, and compared with the traditional mode of replacing the adhesive tape disc, the material replacing mode is simpler, and the deflection of the positions of the adhesive tape sections can be effectively prevented;
3. the pre-composite piece is prepared for standby, so that the material receiving platform can prepare required components in the process of streaming, the waiting time for supplying the adhesive tape can be effectively shortened, and the productivity of the device can be improved;
4. the material receiving platform can circularly and alternately act, so that the continuity of battery piece string making can be ensured, and the string making efficiency can be improved.
Drawings
Fig. 1 schematically shows a block diagram of an interconnect system without a primary grid photovoltaic cell.
Fig. 2 schematically shows a block diagram (another angle) of a device for manufacturing a string of photovoltaic cells without primary grids.
Fig. 3 schematically shows a structural view of the laser dicing handling mechanism.
Fig. 4 schematically shows a structural view of the third bracket.
Fig. 5 schematically shows a positional relationship diagram of the battery pieces before and after the dicing.
Fig. 6 schematically shows a block diagram of the tape slit pitch mechanism.
Fig. 7 schematically shows a partial enlarged view at a in fig. 6.
Fig. 8 schematically shows a partial enlarged view at B in fig. 6.
Fig. 9 schematically shows a structural view of the solder ribbon composite preparation apparatus.
Fig. 10 schematically illustrates a top view of the composite carrier.
Fig. 11 schematically shows a structure of the draw tape handle.
Fig. 12 schematically shows a structural view of the battery sheet composite pressing device.
Fig. 13 schematically shows a step diagram of an interconnection method of a string of photovoltaic cells without a main grid.
Fig. 14 schematically shows a positional relationship diagram of the receiving platform and other devices in step S1.
Fig. 15 schematically shows a positional relationship diagram of the receiving platform and other devices in step S2.
Fig. 16 schematically shows a schematic of the simultaneous execution of step S4 and step S6.
Fig. 17 schematically shows a schematic diagram in which step S4 and step S5 are performed simultaneously.
Fig. 18 schematically shows a schematic of an alternating cycle of two receiving platforms.
Wherein, 1-a material receiving platform;
2-battery piece feeding mechanism, 21-laser scribing carrying mechanism, 211-first action module, 211A-first support, 211B-first motor, 212-second action module, 212A-second support, 212B-second motor, 212C-turntable, 212D-gas electric slip ring, 213-third support, 213A-support rod, 213B-connecting rod, 213C-connecting piece, 214-carrying module, 214A-first gripper, 214A 1-gripper frame, 214A 2-sucker, 214B-second gripper, 214C-cylinder, 214D-solenoid valve, 214E-vacuum generator, 22-conveying component, 23-piece arranging device, 24-line scanning module, 25-centering positioning component;
3-welding a strip coil;
4-adhesive tape slitting and distance-changing mechanism, 41-mounting substrate, 42-material shaft, 421-material disc, 43-cutter component, 430-cutter backing plate, 432-cutter fixing plate, 433-cutter, 433A-upper cutter group, 433B-lower cutter group, 434-separation ring, 435-mounting fixing plate, 441-first guide wheel component, 442-second guide wheel component, 460-mounting plate, 461-distance-changing plate, 461A-guide groove, 463A-support plate, 463B 1-guide post, 463B 2-press block, 463B 3-stop, 463B 4-spring, 47-guide distance-separating component, 491-residue detecting sensor, 492-driving motor;
The device comprises a 5-welding strip composite part preparation device, a 51-welding strip feeding roll, a 52-first pressing and holding mechanism, a 53-cutting mechanism, a 531-welding strip threading die, a 54-composite part transferring mechanism, a 541-composite part carrying platform, a 541A-first bottom plate, a 541B-adsorption plate, a 541C-welding strip groove, a 541D-adhesive tape adsorption block, a 55-pulling strip handle, a 551-second bottom plate, a 551A-air hole, a 551B-connecting part, a 552-clamping jaw, a 553-rotating shaft, 554-elastic membrane, a 555-positioning connecting ring, 556-first elastic parts, 557-second elastic parts, a 56-adhesive tape carrying mechanism, a 57-second pressing and holding mechanism and a 58-sliding platform;
6-a composite carrying mechanism;
71-transmission components, 711-transmission shafts, 712-belt pulley sets, 712A-driving wheels, 712B-driven wheels, 712C-belts, 713-driving mechanisms, 72-eccentric wheels, 73-bearings, 74-cams, 75-pressing members, 751-action plates, 752-sliding blocks, 754-pressing plates, 755-guide rods, 756-springs, 757-pressing tools and 76-frames;
8-a dust removing device, 81-an adsorption dust removing mechanism and 82-a dust removing negative pressure air source;
9, streaming out the carrying hand;
10-stringing the platforms;
11-cell handling mechanism.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
This example is only a part of embodiments of the present invention, but the scope of the present invention is not limited thereto. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be encompassed within the scope of the present invention.
As a first embodiment of the present invention, there is provided an interconnection system of photovoltaic cells without main grid, as shown in fig. 1 and 2, including: the device comprises a receiving platform 1, a battery piece feeding mechanism 2, a welding strip material roll 3, an adhesive tape slitting and distance changing mechanism 4, a welding strip composite part preparation device 5, a composite part conveying mechanism 6, a battery piece composite part pressing device (not shown in fig. 1 and 2), a dust removing device 8, a series of conveying hands 9, a series of forming platforms 10 and a battery piece conveying mechanism 11. In fig. 2, strings are input from the lower right and output from the upper left. The two tape slitting and distance-changing mechanisms 4 are used for providing a tape group, and the tape slitting and distance-changing mechanisms 4 comprise a first tape slitting and distance-changing mechanism and a second tape slitting and distance-changing mechanism.
The material receiving platform 1 is a rectangular table top and is used for placing a battery string semi-finished product, the material receiving platform 1 comprises two ends, one end is a starting end and is used for placing a first battery piece, and the other end is a tail end and is used for placing a last battery piece. The beginning is located upstream of the string and the end is located downstream of the string. The negative pressure generating device is connected with the material receiving platform 1, a vacuum adsorption hole is formed in the material receiving platform 1 and used for adsorbing the adhesive tape group or the battery piece placed on the material receiving platform, dislocation of the adhesive tape group in the moving process of the material receiving platform is prevented, and the battery piece and the adhesive tape group can be pre-adhered by adsorbing the battery piece. As the preferred implementation mode, the number of the material receiving platforms 1 is two, alternating circulation actions are carried out on the assembly line for forming the battery strings through the lifting module and the reciprocating movement module, when one material receiving platform moves to the material discharging station, the other material receiving platform can move to the assembly line for continuously executing the string forming action, so that corresponding equipment has faster beat and higher productivity.
The battery piece feeding mechanism 2 is arranged on one side of the material receiving platform 1, and the welding strip material roll 3, the first adhesive tape slitting and distance changing mechanism, the second adhesive tape slitting and distance changing mechanism, the welding strip composite part preparation device 5 and the composite part carrying mechanism 6 are arranged on the other side of the material receiving platform 1.
The battery piece feeding mechanism 2 is used for preparing battery pieces. The battery piece carrying mechanism 11 is used for carrying battery pieces to the receiving platform 1. The battery piece feeding mechanism comprises a laser scribing device (not shown in fig. 2), a laser scribing carrying mechanism 21 (not shown in fig. 2), a conveying assembly 22, a piece arranging device 23, a line scanning module 24, a centering assembly 25 and a positioning camera (not shown in fig. 2). The laser scribing device is used for dividing the whole battery piece. The laser dicing and conveying mechanism 21 is used for conveying the divided battery pieces to the conveying assembly 22. As shown in fig. 3, the laser dicing carrying mechanism 21 includes: a first motion module 211, a second motion module 212, a third support 213 and a plurality of groups of carrying modules 214. The first motion module 211 is connected to the second motion module 212 to drive the second motion module 212 to move up and down. The first motion module 211 includes a first bracket 211A, a first motor 211B, and a cam. The first motor 211B is horizontally arranged and comprises a fixed end and a free end, the fixed end of the first motor 211B is fixedly connected with the first bracket 211A, the free end of the first motor 211B is fixedly connected with the inner ring of the cam, the outer ring of the cam is fixedly connected with the second bracket 212A of the second action module 212, and the cam drives the second action module 212 to move up and down. When the first motor 211B rotates, the outer peripheral side of the first motor continuously abuts against the second support 212A of the second action module 212 when the cam structure rotates, so that the second action module 212 can rapidly achieve a corresponding lifting function, and finally the lifting function is represented as lifting of the third support 213 for grabbing the battery piece, and the whole mechanism is simple to set. The second motion module 212 is slidably disposed along a vertical direction, and is configured to drive the third bracket 213 to rotate in a horizontal direction with the vertical direction as an axis, and includes a second bracket 212A, a second motor 212B, a turntable 212C, and an air electric slip ring 212D. The second bracket 212A is slidably disposed on the first bracket 211A of the first motion module 211, and moves up and down under the driving of the first motion module 211. Specifically, the outer ring of the cam of the first motion module 211 is in sliding contact with the second bracket 212A of the second motion module 212, i.e. the cam and the second bracket 212A are in contact and can slide relatively, so that the second motion module 212 can move up and down. If the cam adopts an eccentric wheel, the outer circumference of the eccentric wheel is a perfect circle, and the outer ring of the eccentric wheel is connected with the second bracket 212A through a bearing. The second motor 212B is vertically arranged and comprises a fixed end and a free end, the fixed end of the second motor 212B is located above and is fixedly connected with the second bracket 212A, the free end of the second motor 212B is located below and is fixedly connected with the turntable 212C, and the second motor 212B drives the turntable 212C to rotate. The turntable 212C is horizontally disposed. The gas-electric slip ring 212D is disposed between the rotary table 212C and the second motor 212B, a fixed end of the gas-electric slip ring 212D is fixedly connected with the second bracket 212A, a rotating end of the gas-electric slip ring 212D is fixedly connected with the rotary table 212C, a gas path is arranged inside the gas-electric slip ring, the gas-electric slip ring 212D is used for supplying gas to the cylinder, and when rotating, the gas path and the circuit are ensured to be unobstructed and cables are prevented from winding. The third support 213 is horizontally disposed and is rotationally symmetrical about the center, and is fixedly connected to the lower portion of the turntable 212C. The rotation axis of the turntable 212C coincides with the rotation symmetry center of the third bracket 213, the second motor 212B drives the turntable 212C to rotate, and the third bracket 213 rotates along with the rotation. The third support 213 is provided with a plurality of grabbing stations, and the distances between each grabbing station and the rotation symmetry center of the third support 213 are equal. The third rack 213 includes four corners on which a plurality of gripping stations are located, respectively. As shown in fig. 4, the third support 213 includes four support rods 213A, four connecting rods 213B and a connecting piece 213C, each support rod 213A includes a first end point, a second end point and a connecting point between the two end points, the first end point is used as a head, the connecting point is used as a tail, the four support rods 213A are connected end to end, a line segment from the first end point to the connecting point of the four support rods 213A forms a square structure, the connecting piece 213C is located at the center of the square, and the four connecting rods 213B are respectively connected with the connecting piece 213C and the four corners. The third bracket 213 allows the supporting rod 213A, the connecting rod 213B and the connecting member 213C to form a whole with each other, so that it is not necessary to provide a strong structure to secure the strength of the structure. As shown in fig. 3, a set of handling modules 214 is provided at one gripping station, each set of handling modules 214 including a first gripper 214A, a second gripper 214B, a cylinder 214C, a solenoid valve 214D, and a vacuum generator 214E. The first grip 214A and the second grip 214B are provided on both sides of the connection point, respectively. The first grip 214A is located on a side away from the second end point and the second grip 214B is located on a side near the second end point. The second grip 214B is fixed to the third bracket 213. The air cylinder 214C includes a fixed end and a free end, the fixed end of the air cylinder 214C is fixedly connected with the third bracket 213, the free end of the air cylinder 214C is fixedly connected with the first gripper 214A, and the air cylinder 214C drives the first gripper 214A to approach or depart from the second gripper 214B along the length direction of the supporting rod 213A, so that the battery pieces are separated. The first gripper 214A includes a gripper frame 214A1 and a plurality of suction cups 214A2 for sucking the battery pieces. A plurality of suction cups 214A2 are provided on the gripper frame 214 A1. The gripper frame 214A1 has an H structure, and four or more suction cups 214A2 are provided at least at four corners of the gripper frame 214A1 by four suction cups 214A2. The suction cup 214A2 is communicated with the vacuum generator 214E through a transfer air path, which may be disposed in the gripper frame 214A1 or may be disposed outside the gripper frame 214 A1. The structure of the second gripper 214B is the same as that of the first gripper 214A. A gripper frame of the second gripper 214B and a plurality of suction cups for sucking the battery pieces. The plurality of suckers are arranged on the gripper frame. The tongs frame is H structure, and the sucking disc is more than four, is set up at four angles of tongs frame by four sucking discs at least. Solenoid valve 214D switches on the gas circuit of cylinder 214C and gas electric slip ring 212D, and solenoid valve 214D controls the ventilation and the outage of cylinder 214C, realizes extension and shortening of cylinder 214C free end, and then realizes the branch distance. Vacuum generator 214E is in communication with suction cup 214A2. The vacuum generator 214E includes a base, control valves, blowing nozzles, air intake nozzles, and a vacuum generating chamber. The air blowing nozzle, the air inlet nozzle and the vacuum generating cavity are arranged in the base. The blowing nozzle and the air inlet nozzle are respectively arranged at two sides of the vacuum generating cavity, the control valve is arranged above the base and used for controlling the on-off of the feeding of the high-pressure gas, and the vacuum generating cavity is communicated with the sucker 214A2. When negative pressure adsorption is needed, the vacuum generating cavity is connected with an internal gas path channel (a transfer gas path and a sucker), and the gas blowing nozzle ejects the accessed high-pressure gas to the gas inlet of the gas inlet nozzle so as to allow the gas inlet nozzle to discharge the gas; at this time, since the air pressure is smaller when the high-speed air flow passes through, the air in the vacuum generating chamber is attracted by the position of the high-speed air flow to generate negative pressure, and thus the vacuum pumping effect is realized through the connecting sucker 214A2. The laser scribing carrying mechanism 21 adsorbs the battery piece through the sucker 214A2 to carry, carries the battery piece through the rotary turntable 212C, realizes continuous carrying, does not need to reciprocate, has good carrying efficiency, improves the beat of carrying, and has better application prospect; the separation of the first gripper 214A and the second gripper 214B is realized through the air cylinder 214C, the separation distance is realized, and the functions of the device are optimized; the third bracket 213 has superior structural strength.
Along the direction of transport of the transport assembly 22 are in turn a film handling device 23, a wire sweep module 24, a centering assembly 25, a positioning camera (not shown in fig. 2) and a correction module (not shown in fig. 2). The conveying component 22 is located at the downstream of the laser scribing conveying mechanism 21 and is used for conveying small cut battery pieces, a conveying belt on the conveying component 22 has a certain adsorption force and is used for maintaining the position state of the battery pieces on the conveying component, a first sensor is arranged on the conveying component 22 and is used for sensing whether the battery pieces are input on the conveying component 22 or not, a second sensor is arranged on the conveying component 22 and is used for sensing whether the battery pieces are input on the working position of the battery piece arranging device 23 or not near the battery piece arranging device 23.
In the preparation processes of printing, gluing, welding and the like of solar cells, the step of cutting a large cell into small cells exists, and two small cells cut by the same large cell usually come out of a cutting machine in a symmetrical form and do not conform to the subsequent processing process, so that a sheet processing device is required to turn one of the two small cells at the moment, and the orientation of each small cell is caused to be consistent. As shown in fig. 5, the left side is two small battery pieces cut out of the same large battery piece, and the right side is a battery piece after being processed by the piece processing device. The tab arrangement 23 is used to divert one of the two small battery tabs. The line scanning module 24 comprises a light source assembly positioned above the conveying assembly 22 and a line scanning camera positioned above the light source assembly, wherein a light source of the light source assembly is obliquely arranged above the conveying assembly 22, and the light source assembly and the line scanning camera are matched for use and are used for observing fine damages which cannot be perceived by naked eyes of people on the battery piece. The centering assembly 25 is used to center the battery cells. The positioning camera is used for being matched with the correction module, is arranged above the conveying assembly 22 and used for carrying out four-point positioning on the battery piece, the positioning camera sends the acquired position information of the battery piece to the system terminal, and the system terminal controls the correction module to accurately correct the battery piece according to the position information of the battery piece.
The first tape slitting and distance changing mechanism is used for providing a first tape group, and the adhesive surface of the first tape group faces upwards. The second tape slitting and distance changing mechanism is used for providing a second tape group, and the adhesive surface of the second tape group faces downwards. The first tape slitting and distance changing mechanism and the second tape slitting and distance changing mechanism have the same structure. The tape slitting and distance-changing mechanism 4 comprises: a mounting substrate 41 as an assembly carrier for each relevant component; the material shaft 42 is specifically and rotatably arranged on the first side surface of the mounting substrate 41, at least two material trays 421 are sleeved on the material shaft 42, a wide adhesive tape is wound on each material tray 421, and the material shaft 42 is driven to rotate by a driving motor 492 (which may include a speed change mechanism) so as to drive each material tray 421 sleeved on the material shaft to synchronously rotate to realize discharging of the wide adhesive tape; the cutter assembly 43 may also be disposed on the first side (in other possible embodiments, it may be disposed on a mounting carrier separately from the mounting substrate 41) for cutting the wide adhesive tape on each tray 421 into a target number of narrow adhesive tapes, where it is to be noted that, in comparison with the wide adhesive tapes, the width relationship between the wide adhesive tapes and the narrow adhesive tapes is determined according to the width of the adhesive tape to be finally cut and the number of divided wide adhesive tapes, for example, in a specific example shown in fig. 6, one wide adhesive tape is uniformly cut into five narrow adhesive tapes, thus, the width of the wide adhesive tape should be five times the width of the narrow adhesive tapes, further, for different working conditions, the number of the trays 421 may be correspondingly configured, as in the example shown in fig. 6, the trays 421 are configured with five groups, so that 25 narrow adhesive tapes with consistent widths can be finally formed; and the tape pitch changing mechanism is used for widening the interval between the narrow tapes cut by the cutter assembly 43. According to the technical scheme, the mode of supplying the initial adhesive tape (namely the wide adhesive tape) by the single material tray in the prior art is improved into the mode of simultaneously configuring at least two material trays for supplying, so that the angle of the cut adhesive tape (namely the narrow adhesive tape) is greatly reduced compared with the previous crossing angle when the adhesive tape pitch-changing mechanism executes the pitch-changing operation, the incidence rate of inclination or deformation of the cut narrow adhesive tape is greatly reduced, the cut adhesive tape is conveniently and subsequently installed on a battery piece, the length distance required by the adhesive tape pitch-changing is reduced, and the operation error rate is reduced. Referring to fig. 6, in some embodiments, along the pulling direction of the wide tape (from left to right in the orientation shown in fig. 6), the upstream side (i.e., the left side in the orientation shown in fig. 6) and the downstream side (i.e., the left side in the orientation shown in fig. 1) of the cutter assembly 43 are respectively provided with a first guide wheel assembly 441 and a second guide wheel assembly 442, wherein the guide surface of the first guide wheel assembly 441 faces downward and the guide surface of the second guide wheel assembly 442 faces upward, and the first guide wheel assembly 441 is parallel to the rotation axis of the second guide wheel assembly 442. In the technical scheme, a group of guide wheel assemblies are respectively arranged at the upstream and downstream of the cutter assembly 43, so that guiding and limiting are formed on the positions of the adhesive tapes entering the cutter assembly 43 and pulling out the cutter assembly 43, and smooth adhesive tape cutting is ensured. The first guide wheel assembly 441 and the second guide wheel assembly 442 may be identical in structure, and include a fixed shaft fixedly mounted on the first side of the mounting substrate 41, and a plurality of spacer sleeves and guide wheels are sleeved on the fixed shaft, and each spacer sleeve and each guide wheel are sequentially and alternately arranged along the axial direction of the fixed shaft, so that it can be understood that the number and positions of the guide wheels are in one-to-one correspondence with the number and positions of the trays 421, and further, smooth guiding of each wide adhesive tape is ensured, and the arrangement of the spacer sleeves ensures that the guide wheels are in position correspondence with the trays 421. Referring to fig. 7 specifically, in some embodiments, the cutter assembly 43 includes a cutter pad 430, a cutter mounting shaft, and a plurality of cutter fixing plates 432 sleeved on the cutter mounting shaft, a section of the cutter mounting shaft is linked with a mounting fixing plate 435, and along the axial direction of the cutter mounting shaft, two adjacent cutter fixing plates 432 form alternately spaced cutter mounting intervals and interval intervals, each cutter mounting interval is internally provided with a plurality of cutters 433, each interval is internally provided with a separation ring 434, and a plurality of notches are formed on the plane of the cutter pad 430 and are inserted in each notch in a one-to-one correspondence with the cutting edges of the cutters 433. In this technical scheme, form the clearance of cutting of sticky tape between cutting edge and the breach of cutter 433, adjacent cutter fixed plate 432 forms reliable fixed to each cutter 433 in the cutter installation interval between the two, and can correspond with the introduction position of each wide sticky tape, and spacing ring 434 in the interval then makes each cutter 433 can be in the axial of cutter installation axle with the position one-to-one accurate correspondence of each wide sticky tape. With continued reference to fig. 7, each of the cutters 433 in each of the cutter mounting sections includes an upper cutter group 433A and a lower cutter group 433B, that is, an upper cutter group 433A and a lower cutter group 433B, which are symmetrical with respect to the central axis of the cutter mounting shaft, opposite to each other, so that a slitting tape can be set by selecting one of the upper cutter group 433A and the lower cutter group 433B to correspond to the cutter backing plate 430, and the other group can be used as a spare cutter group, for example, when the lower cutter group 433B is slit for a long time to cause wear and rejection, the upper cutter group 433A can be set to correspond to the cutter backing plate 430 in an adjustment position (turned 180 °), so that an operator does not need to prepare a new cutter, but rotates the cutter assembly by 180 °, and replaces the lower cutter group 433B originally at the lower end with the upper cutter group 433A originally at the upper end, thereby greatly facilitating maintenance of the apparatus by an operator. Referring to fig. 6 and 8 in combination, the tape pitch change mechanism includes: the pitch changing assembly and the guiding and separating assembly 47 are assembled on the mounting plate 460, and the mounting plate 460 can be connected with the mounting substrate 41, wherein the pitch changing assembly is positioned on the tape leading-out side of the cutter assembly 43 and on the tape leading-in side of the guiding and separating assembly 47; the distance changing assembly comprises a distance changing plate 461 and an adhesive tape pressing plate, wherein a plurality of groups of guide grooves 461A are formed on the top surface of the distance changing plate 461, each guide groove 461A is arranged in a divergent mode along the leading-out direction of the adhesive tape, and the adhesive tape pressing plate is connected to the top surface of the distance changing plate 461 so as to seal the notch of each guide groove 461A. In this technical scheme, through each guide slot 461A that diverges the form setting, increase the interval of each narrow sticky tape gradually, and then realize the matching of the welding strip interval of each narrow sticky tape after cutting and follow-up battery piece, foretell sticky tape clamp plate then can restrict each sticky tape and be in each guide slot 461A completely, guarantees the level and smooth of each sticky tape after cutting. Further, the distance-changing assembly further includes a front-end pressing block assembly (not shown) that includes a support plate 463A that is erected on the distance-changing plate 461, and a plurality of pressing block members, where each pressing block member is disposed corresponding to each group of the guide grooves 461A. The front end pressing block assembly is arranged on the adhesive tape entering side of each group of guide grooves 461A, so that the position of each adhesive tape can be maintained in a state of being manually placed, and the adhesive tape entering the subsequent guide grooves 461A is ensured to be flat. As a specific implementation manner of the briquetting component, each briquetting component includes two guide posts 463B1 arranged at intervals, a briquetting 463B2 connected to the bottom ends of the two guide posts 463B1, and a stop block 463B3 connected to the top ends of the two guide posts 463B1, the two guide posts 463B1 are inserted into through holes of the supporting plate 463A, a spring 463B4 is sleeved on the guide posts 463B1, and two ends of the spring 463B4 respectively collide with the bottom surface of the supporting plate 463A and the top surface of the briquetting 463B 2. It will be appreciated that the aforementioned press block 463B2, the adhesive tape press plate should be made of a material which is not adhered by the adhesive tape or should have a corresponding anti-adhesive layer on the side of the adhesive surface facing the adhesive tape. In a specific application process, the slit tape (i.e. the narrow tape) pulled by the second guide wheel assembly 442 is manually placed into the tape pitch-changing mechanism, in this process, the pressing block 463B2 needs to be lifted manually by the lifting block 463B3, then the slit tape is pulled out from the lower side of the pressing block 463B2 and inserted between the pitch-changing plate 461 and the tape pressing plate, after the tape is threaded, the block 463B3 is placed, the pressing block 463B2 is driven by the spring 463B4 to be pressed down above the notch of each guide slot 461A, the pressing block 463B2 is in direct contact with the tape, the front section for tape pitch separation is limited, after the tape passes out from the position of the pressing block 463B2, the tape extends along the guide slots 461A on the pitch-changing plate 461A distribution, so that a certain distance exists between the slit tapes, and finally each tape is threaded by the guide pitch-changing assembly 47, so that the tapes can be mounted on a battery piece with a constant pitch. The specific structure and principle of the guiding and spacing assembly 47 can be the same as the first guiding wheel assembly 441 and the second guiding wheel assembly 442, except that the number of guiding wheels is larger and the spacing is smaller, so as to form the spacing guiding for a plurality of narrow adhesive tapes. In a preferred embodiment, a residue detection sensor 491 is provided corresponding to each tray 421 to enable real-time detection of tape residue on each tray 421. The tape slitting and distance-changing mechanism has small structure and large pressing force.
The solder strip coil 3 is used for providing a solder strip group, and comprises a first solder strip group, a second solder strip group and a third solder strip group. The first welding strip group is a welding strip group positioned below the first battery piece, the third welding strip group is a welding strip group positioned above the last battery piece, the second welding strip group is connected with two adjacent battery pieces, one section is positioned on the upper surface of the battery piece, and the other section is positioned on the lower surface of the other battery piece. The first welding band group, the second welding band group and the third welding band group are provided by the welding band material roll 3, and only the lengths of the first welding band group, the second welding band group and the third welding band group are different, the length of the second welding band group is about the width of two battery pieces, and the lengths of the first welding band group and the third welding band group are longer than the width of one battery piece. The length of the first welding band group is smaller than that of the second welding band group, and the length of the third welding band group is smaller than that of the second welding band group.
The welding strip composite preparation device 5 is arranged between the first adhesive tape slitting and distance changing mechanism and the second adhesive tape slitting and distance changing mechanism and is used for attaching the first adhesive tape group or the second adhesive tape group to the welding strip group to form a welding strip composite, namely, a first pre-composite and a second pre-composite are prepared, wherein the first pre-composite comprises the second adhesive tape group and the second welding strip group, the second welding strip group comprises a first section and a second section, and the adhesive surface of the second adhesive tape group faces downwards; the second adhesive tape group of the first pre-composite piece is attached to the upper part of the upper battery piece, and the second section of the second welding tape group is attached to the upper part of the first adhesive tape group of a station at the downstream of the upper battery piece; the second pre-composite comprises a second adhesive tape group and a third adhesive tape group, the third adhesive tape group comprises a first section and a second section, the adhesive surface of the second adhesive tape group faces downwards, and the first section of the third adhesive tape group is adhered below the second adhesive tape group; the second adhesive tape group of the second pre-composite piece is attached above the last battery piece, and the second section of the third welding tape group extends out towards the downstream direction of the battery string. Because the welding strip composite part preparation device 5 is arranged between the two adhesive tape slitting variable-pitch mechanisms, the first adhesive tape group, the second adhesive tape group and the welding strip group are prepared in advance through relatively fixed stations, the complex preparation devices can be not required to be moved by controlling the movement of the material receiving platform 1, only fixed program actions are executed, and the battery string forming precision can be improved in a simple and convenient mode. As shown in fig. 9, the device comprises a solder strip feeding roll 51, a first pressing and holding mechanism 52, a cutting mechanism 53, a composite part transferring mechanism 54 and a pull strip hand 44, wherein the solder strip feeding roll 51, the first pressing and holding mechanism 52, the cutting mechanism 53, the composite part transferring mechanism 54 and the pull strip hand 55 are sequentially and alternately arranged on a solder strip traction path along a solder strip traction direction, the first pressing and holding mechanism 52 is the solder strip pressing and holding mechanism, and the solder strip composite part preparation device 5 further comprises an adhesive tape conveying mechanism 56 for transferring and attaching an adhesive tape set to the solder strip set on the composite part transferring mechanism 400. It can be understood that the aforementioned solder strip feed roll 51 is a placement member of a solder strip reel, which is capable of feeding the solder strip groups by the solder strip roll 3; the cutting mechanism 53 is provided with a corresponding cutting knife and the like, so that the welding strip group pulled from the welding strip feeding roll 51 can be cut to form a welding strip section with a target length, and the first pressing and holding mechanism 52 can ensure that the position of the welding strip group is reliable and stable when the cutting mechanism 53 cuts, thereby facilitating smooth cutting; the tape pulling hand 55 can linearly translate back and forth along the length direction of the tape set so as to pull the tape set out of the target length, and the composite transferring mechanism 54 is used for placing the cut tape segment with the target length so as to facilitate the tape set transferred by the tape transferring mechanism 56 to be attached to the tape segment to form a tape composite. The first pressing mechanism comprises a pad table and pressing components arranged above the pad table, the pressing components comprise a mounting frame and a plurality of pressing block components arranged on the mounting frame, the pressing block components are in one-to-one correspondence with welding strips passing between the pad table and the pressing components, a main air chamber and a plurality of air passage channels which are in controllable communication with the main air chamber are arranged in the mounting frame, the main air chamber is in controllable communication with an external pressure air source, and the output ends of the air passage channels are respectively corresponding to the pressing block components, so that the pressing block components can be forced to move towards the pad table to press and hold the welding strips. The composite transfer mechanism 54 includes a composite carrier 541, and the composite carrier 541 can adsorb only the tape set and simultaneously adsorb the tape set and the tape set, so that the composite transfer mechanism 54 can transfer both the pre-composite (tape set+tape set) and the tape set. Preferably, two kinds of suckers are arranged on the composite part transferring mechanism 54, the two kinds of suckers are respectively distributed on two sides of the composite part transferring mechanism 54, the suction holes of one group of suckers are in a plane and used for sucking an upper adhesive tape or a lower adhesive tape, the suction holes of the other group of suckers are in a V shape, and the composite part transferring mechanism 54 can clamp the gap part in the V shape of the sucker at the position of a welding belt, so that the suction area of the welding belt is favorably lifted, and the welding belt can be accurately sucked. As shown in fig. 10, the composite carrier 541 includes a first base plate 541A and an adsorption plate 541B connected to the first base plate 541A, where the adsorption plate 541B is configured with a plurality of solder grooves 541C for limiting each solder strip, the bottom of each solder groove 541C has an adsorption hole, the adsorption plate 541B is also configured with a plurality of tape adsorption blocks 541D, each tape adsorption block 541D is disposed at intervals on a length extension path of each solder groove 541C, the tape adsorption blocks 541D also have the adsorption holes, each tape adsorption block 541D and each solder groove 541C are arranged along a straight line and are all located on a path of travel of the solder strip, and the solder groove 541C is located upstream of each tape adsorption block 541D with respect to a direction of travel of the solder strip. In this technical scheme, set gradually along the direction of advancing of wearing of welding strip and weld the trough 541C and a plurality of sticky tape absorption piece 541D on the absorption board 541B of compound carrier 541, wherein weld the trough 541C and can guarantee that the position of welding strip is accurate to guarantee the quality of sticky tape and welding strip complex pre-bonding, and the sticky tape absorption piece 541D that the interval set up can reduce sticky tape and sticky tape absorption piece 541D's area of contact, reduces the adhesion probability. As a more preferable embodiment, the adhesive tape adsorption block 541D may be made of an anti-adhesive material or provided with an anti-adhesive layer on its top surface, so as to further reduce the adhesion probability of the adhesive tape. In a preferred embodiment, the width of the suction hole in the tape suction block 541D is larger than the width of the solder strip section, so as to ensure that the tape pre-adhered to the solder strip section and the solder strip are simultaneously and reliably sucked. In another possible embodiment, the composite transfer mechanism 54 further has a lifting assembly (not shown) capable of driving the composite carrier 541 to lift, and the lifting assembly can be controlled to lift the adhesive tape on each adhesive tape suction block to attach the adhesive tape from the bottom surface of the solder tape section. In another preferred embodiment, the welding strip composite preparation apparatus further includes a second pressing mechanism 57, the second pressing mechanism 57 is located between the cutting mechanism 53 and the first pressing mechanism 52, and the second pressing mechanism 57 and the cutting mechanism 53 are jointly disposed on the same sliding platform 58, wherein the second pressing mechanism 57 is fixedly disposed on the sliding platform 58, and the cutting mechanism 53 can move transversely relative to the sliding platform 58. In this technical solution, by setting the second pressing mechanism 57 adjacent to the cutting mechanism 53, the position change of the welding band set can be avoided when the cutting mechanism 53 cuts the welding band set, so as to ensure good cutting, and the second pressing mechanism 57 may be identical to the first pressing mechanism 52 in specific structure, or may be different from the first pressing mechanism, and may be a pressing mechanism commonly used in the prior art. At this time, it should be noted that, in a specific application process, when the welding band set is cut and then the band handle 55 is required to pull the welding band set with the target length outwards again, the first pressing mechanism 52 is controlled to reliably press the welding band set to achieve positioning of the welding band set, meanwhile, the second pressing mechanism 57 releases the pressing of the welding band set at this time, and along with the cutting mechanism 53, it follows the sliding platform 58 to approach the welding band feeding roll 51 side, that is, the first pressing mechanism 52 side, so as to leak the clamping end of the welding band set, and the band handle 55 moves to the cutting mechanism 53 side and clamps the clamping end and reversely moves the welding band set to the target length. Referring to fig. 9 specifically, the composite carrying platforms 541 have two groups, and the two groups of composite carrying platforms 541 can be alternately switched between the station to be extracted from the welding strip group and the station to be fed from the welding strip group, and by alternately switching the two groups of composite carrying platforms 541, the prepared beats can be improved to supply to the back end assembly line, which is beneficial to improving the processing efficiency. Specifically, the composite transferring mechanism 54 includes a second frame (not labeled in the figure), and two sets of composite carriers 541 are respectively disposed on opposite sides of the second frame, and are respectively driven to move transversely and lift by a related driving mechanism (such as a translation sliding table module, etc.), so that the two sets of composite carriers 541 are circularly lifted in an "o" shape. The tape handling mechanism 56 is disposed corresponding to the tape pitch-changing mechanism (not shown in fig. 9), and is used for handling the prepared tape set onto the composite carrier 541 so as to complete the pre-bonding operation of the tape and the solder tape; specifically, it includes the support of installing on the linear movement module, is equipped with corresponding actuating mechanism on the support, and actuating mechanism's below is equipped with the sucking disc, and the sucking disc is used for adsorbing the sticky tape, and actuating mechanism is used for driving the sucking disc and removes in vertical direction to place the sticky tape that is adsorbed on compound carrier 541, with attaching the welding set of bands. Note that, the above-mentioned tape handling mechanism 56 may be used to handle an upper tape or a lower tape, where the upper tape refers to a tape with a tape surface facing downward, the lower tape refers to a tape with a tape surface facing upward, and when the upper tape is sucked, it is noted that the contact surface of the composite carrier 541 should be a non-stick layer, and when the lower tape is sucked, the portion where the suction cup contacts the tape surface of the tape is a non-stick layer. The foregoing cutting mechanism 53 further includes a solder strip threading die 531 disposed in mating relationship with the cutting blade thereof.
As shown in fig. 11, referring to fig. 11 in combination, the handle 55 includes a second bottom plate 551 and a plurality of clamping jaws 552, the second bottom plate 551 is connected with a rotating shaft 553, the plurality of clamping jaws 552 are sequentially and rotatably connected to the rotating shaft 553 along an axial direction of the rotating shaft 553 (for example, each clamping jaw 552 is sleeved on the rotating shaft 553), the second bottom plate 551 is further provided with an elastic membrane 554 or an air bag, the clamping jaws 552 have a first end for clamping a belt body and a second end for matching with the elastic membrane 554 or the air bag, the elastic membrane 554 or the air bag is located between each second end and the second bottom plate 551, the clamping jaws 552 have a belt body clamping state in which the first end moves close to the second bottom plate 551 and an unclamping state in which the first end moves away from the second bottom plate 551, and the elastic membrane 554 or the air bag can drive the clamping jaws 552 to switch between the belt body clamping state and the unclamping state under the action of pressure gas inlet or discharge. In this technical solution, the synchronous force application to the second end of each clamping jaw 552 matched with the elastic membrane 554 or the air bag is achieved through the actuation action of the elastic membrane 554, and under the action of the actuation force (i.e. deformation force), each clamping jaw 552 rotates by taking the rotating shaft 553 as the rotation center to achieve that each clamping jaw 552 is switched from the clamping releasing state to the clamping state of the belt body, no driving part (such as a plurality of direct-drive cylinders respectively corresponding to each clamping jaw 552) in the prior art is required, the whole device volume of the belt handle is greatly reduced, the utilization rate of the equipment to the space is improved, the synchronous state switching of the driving of each clamping jaw 552 by the same elastic membrane 554 or the air bag can be ensured, and the clamping force of each clamping jaw 552 can be ensured to be relatively consistent. The belt body can be an adhesive belt or a welding belt according to actual working requirements. In a preferred embodiment, the elastic membrane 554 is preferably used, where the second bottom plate 551 is provided with air holes 551A, the elastic membrane covers the second bottom plate 551, and the air holes 551A are located in the coverage area of the elastic membrane, and in a preferred embodiment, the elastic membrane 554 is implemented by using a silica gel membrane, which has high strength and wear resistance, so that the service life of the elastic membrane 554 is relatively long. In this technical scheme, the gas through gas pocket 551A input certain pressure can make the elastic membrane take place deformation and bulge, utilizes the elasticity effect of diaphragm deformation to snatch (i.e. the centre gripping) to sticky tape or welding area in order to make clamping jaw 552 on clamping jaw 552, because this elastic deformation can be fine effect on every clamping jaw, consequently every clamping jaw all can have better clamping force to weld area or sticky tape centre gripping, need not to consider the action precision of transmission precision to every clamping jaw. The elastic membrane's in this scheme of adoption stretching strap hand, it only needs and the air supply direct intercommunication can, need not to directly link by relevant control mechanism, consequently its thickness size can accomplish very thinly, uses in this embodiment, can accomplish thickness to be about 12mm, can effectively promote the inside space utilization of equipment. In a specific embodiment, the thickness of the elastic membrane is preferably about 1mm, so as to prevent the irreversible deformation from affecting the subsequent operation. The elastic membrane can be specifically adhered to the top surface of the second bottom plate 551 in an adhesive manner, and in another preferred embodiment, the peripheral edge of the elastic membrane is detachably connected with the second bottom plate 551 through the positioning connection ring 555, so that the elastic membrane can be replaced more conveniently, and the overall service life of the pull belt handle is prolonged. The portion between each first end and the rotating shaft 553 is defined as a first section, a first elastic piece 556 is arranged between the first section and the second bottom plate 551, and an upward elastic force can be applied by the first elastic piece 556, so that each clamping jaw 552 can be switched to a clamping-releasing state more smoothly when the air hole 551A is exhausted; as a preferred embodiment, the first elastic members 556 are coil springs, and the second bottom plate 551 has a plurality of accommodating holes formed on a plane facing the first end, and one end of each first elastic member 556 away from the first section is located in each accommodating hole (not labeled in the figure) in a one-to-one correspondence manner, so that the positions of the first elastic members 556 can be ensured to be more reliable and stable. In another preferred embodiment, a second elastic member 557 is disposed at a side of each second end away from the elastic membrane 554 or the air bag, so as to apply a downward elastic force, thereby further enabling each clamping jaw 552 to be smoothly switched to the clamping-released state when the air hole 551A is exhausted. Specifically, the second elastic member 557 is a spring, one end of the second elastic member 557 is fixedly connected with the second bottom plate 551, the other end is abutted against one side of the second end, which is away from the elastic membrane 554 or the air bag, the spring is in a cantilever structure, and elastic force can be applied to the second end through the free end of the spring, preferably, the whole structure of the spring can be in a V shape, and the inflection point position of the spring is abutted against the second end of the clamping jaw 552. In some embodiments, the second bottom plate 551 has a connection portion 551B, and the connection portion 551B is located at one end of the second bottom plate 551, specifically, the connection portion 551B has a plurality of connection holes thereon, through which detachable connection with the corresponding displacement driving components is achieved. The pull belt handle 55 has a small structure and high holding force.
The composite carrying mechanism 6 is used for carrying the welding strip composite to the receiving platform 1.
The battery piece composite part pressing device is arranged above the material receiving platform 1. As shown in fig. 12, the battery sheet composite pressing device includes: the drive assembly 71, eccentric 72, bearing 73, cam 74, hold-down 75 and frame 76. The frame 76 is a door frame structure and comprises side frames on two sides and an upper frame fixedly connected with the side frames on two sides. The drive assembly 71 includes a drive shaft 711, a drive mechanism, and a drive mechanism 713. The transmission shaft 711 is horizontally disposed between two side frames of the stand 76 and below the upper frame. The drive mechanism 713 may be a motor or a cylinder. The transmission mechanism is used for driving the transmission shaft 711 to rotate under the drive of the driving mechanism 713, and the transmission mechanism can be a belt pulley group, a screw rod or a direct connection rod. When a lead screw is used, the drive mechanism 713 may be a motor, preferably a torque motor, that may be used to control the pressure on the battery plate assembly. When a straight rod is used, the driving mechanism 713 adopts an air cylinder, and the action precision of the pressing position of the air cylinder needs to be ensured through a responsive limiting mechanism, so that the proper pressure is ensured. When a pulley set is used, the driving mechanism 713 uses a motor. Preferably, the transmission mechanism adopts a pulley group 712 comprising a driving pulley 712A, a driven pulley 712B and a belt 712C. The driving mechanism 713 of the transmission assembly 71 is fixed above the frame 76, and the driving mechanism 713 is fixedly connected with the driving wheel 712A to drive the driving wheel 712A to rotate. The belt 712C is wound around the outer rings of the driving pulley 712A and the driven pulley 712B, and the driving pulley 712A drives the driven pulley 712B to rotate. The driven wheel 712B is sleeved on the transmission shaft 711, and an inner ring of the driven wheel 712B is fixedly connected with the transmission shaft 711 to drive the transmission shaft 711 to rotate. The number of eccentric wheels 72, bearings 73 and cams 74 is uniform, and preferably, as shown in fig. 12, the number of eccentric wheels 72, bearings 73 and cams 74 is 2. The transmission shaft 711 passes through the inner ring of the eccentric 72 and is fixedly connected with the eccentric 72. The inner ring of the bearing 73 is fixedly connected with the outer ring of the eccentric wheel 72. The cam 74 is in the shape of an inverted drop, and the cam 74 includes a wheel portion and a boss portion. The wheel part of the cam 74 comprises an inner ring, the wheel part is connected with the eccentric wheel 72 through a bearing 73, and the outer ring of the bearing 73 is fixedly connected with the inner ring of the wheel part of the cam 74. The pressing member 75 is provided below the transmission shaft 711 and is hinged to the boss of the cam 74. The pressing member 75 is slidably disposed on the frame 76 in a vertical direction, and the pressing member 75 includes an action plate 751, a slider 752, a slide rail, a pressing plate 754, a guide bar 755, a spring 756, a presser 757, and a hinge 758. The slide rail is vertically arranged on two sides of the acting plate 751, the sliding block 752 is fixed on the frame 76, the sliding block 752 is matched with the slide rail, and the slide rail can slide up and down along the length direction of the slide rail, so that the acting plate 751 can move up and down along the vertical direction. The hinge 758 is fixed above the acting plate 751, is hinged with the boss of the cam 74, and is driven by the cam 74, the hinge 758 drives the acting plate 751 to move up and down. The pressing plate 754 is disposed below the action plate 751. The guide bar 755 is vertically arranged, and the lower end of the guide bar is fixedly connected with the pressing plate 754. The acting plate 751 is provided with a through hole through which the guide bar 755 passes, a transverse plate is fixed at the upper end of the guide bar 755, and the transverse plate is larger than the through hole, so that the acting plate 751 can drive the guide bar 755 to move upwards, and the guide bar 755 and the pressing plate 754 move downwards when the acting plate 751 moves downwards under the action of gravity of the pressing plate 754. The spring 756 is vertically sleeved on the guide bar 755 and is positioned between the pressing plates 754 of the acting plate 751, and the spring serves as a buffer to control the force of the presser 757 on the surface of the battery pack. The presser 757 is fixed below the pressing plate 754, and the lower surface of the presser 757 includes a plurality of parallel adhesive tape pressing ribs and a plurality of parallel solder grooves. Each adhesive tape pressing raised strip is provided with a welding groove which is parallel to the adhesive tape pressing raised strips. The adhesive tape pressing raised strips are beneficial to the discharge of bubbles, and the welding belt grooves are used for avoiding the parts penetrated by the welding belt with the adhesive tape adhered. The presser 757 is made of silica gel. When the driving shaft 711 drives the eccentric wheel 72 to rotate, the hinge point of the cam 74 can be lifted, so that the action plate 751 is driven to lift, and the action plate 751 can reciprocate, so that the pressing tool 757 arranged below can press the composite part repeatedly. The reciprocating lifting action of the pressing plate 754 and the pressing tool 757 can be realized by driving the driving mechanism 713, the rotation direction of the driving mechanism 713 is not required to be changed, and the action beat efficiency is high; through the design of the cam 74 and other mechanisms, the action plate 751 can realize reciprocating lifting action, and the mechanism has novel structure and strong stability; the spring 756 changes the hard contact into the flexible contact, so that the overlarge surface stress of the battery plate component can be effectively prevented, the better pressure can be stabilized to act on the adhesive tape, and the damage to the battery plate can be prevented.
The dust removing device 8 is arranged above the receiving platform 1. As shown in fig. 2, the dust removing device 8 includes an adsorption dust removing mechanism 81 and a dust removing negative pressure air source 82. The dust removal negative pressure air source 82 is connected with the adsorption dust removal mechanism 81 and is used for providing an air source. The adsorption and dust removal mechanism 81 is arranged above the material receiving platform 1 and is used for adsorbing dust and preventing viscose from pressing fragments.
The serial-out carrying hand 9 is disposed in the serial output direction and is used for carrying the serial battery strings completed on the material receiving platform 1 to the serial platform 10.
The scheme gets rid of the defects of the traditional welding process, the adhesive tape preparation process is fast, the welding time can be omitted, the influence of temperature on the welding effect is not required to be considered, the process is simple, and the automatic efficiency is high; the needed adhesive tape sections are manufactured in a tape cutting mode, and compared with the traditional mode of replacing the adhesive tape disc, the material replacing mode is simpler, and the deflection of the positions of the adhesive tape sections can be effectively prevented; the preparation of the pre-composite piece and the placement of the battery piece can be performed simultaneously, the preparation of the pre-composite piece and the placement of the adhesive tape group can be performed simultaneously, and the preparation of the pre-composite piece is used for standby, so that the material receiving platform 1 can prepare required components in the process of streaming, the supply waiting time of the adhesive tape can be effectively shortened, and the productivity of a device can be improved; the material receiving platform can circularly and alternately act, so that the continuity of battery piece string making can be ensured, and the string making efficiency can be improved.
As a second embodiment of the present invention, there is provided a method for interconnecting photovoltaic cells without main grid, using the interconnection system without main grid of the first embodiment, as shown in fig. 13, comprising the steps of:
S1: the first adhesive tape set with the adhesive surface facing upwards is arranged at the initial end on the material receiving platform, and the initial end of the material receiving platform is positioned at the upstream of the battery strings.
As shown in fig. 14, the first tape position is used for preparing a first tape group, which is the position of the first tape slitting and distance changing mechanism; preparing a welding strip group and a pre-composite piece at a welding strip position, namely the position of a welding strip material roll and welding strip composite piece preparation device 5; preparing a second tape group at a second tape position, wherein the second tape group is the position of a second tape slitting and pitch-changing mechanism; the battery piece position is a battery piece feeding mechanism 2, and a first adhesive tape group is firstly arranged at the starting end of the material receiving platform.
And preparing a first tape group by adopting a first tape slitting and pitch-changing mechanism.
The first adhesive tape group is obtained by pulling out the whole roll of adhesive tape, cutting the whole roll of adhesive tape, and then performing pitch change.
The method for cutting the whole roll of adhesive tape after being pulled out comprises the following steps: as shown in fig. 6, the whole roll of tape is pulled out, and as shown in fig. 7, a plurality of cutters 433 cut the tape from above and/or below the tape in a direction parallel to the tape pulling-out direction. Compared with the mode that a plurality of flat tape reels are directly adopted, the material changing mode is more convenient, in addition, the tape rolls on the tape reels cannot incline due to over-thinness, and the accurate tape supply is more facilitated to be ensured.
The method of performing the pitch change includes, as shown in fig. 8, guiding the slit tape set to the plurality of guide grooves 461A, and pulling apart the plurality of tapes of the tape set.
S2: the first welding band group comprises a first section and a second section, the second section of the first welding band group is arranged above the first adhesive band group, and the first section of the first welding band group extends out towards the upstream direction of the battery string.
As shown in fig. 15, the starting end of the material receiving platform 1 moves to the welding strip position, and the welding strip position prepares a first welding strip group and is firstly arranged above the first adhesive strip group at the starting end of the material receiving platform. The first welding strip group is moved to the material receiving platform 1 by the composite transfer mechanism 54.
S3: the first battery piece is placed over the first tape set.
Before the battery piece is placed, the whole battery piece is divided into small battery pieces by adopting the battery piece feeding mechanism 2, and then the battery pieces are arranged.
Dividing the whole battery piece into a front small battery piece and a back small battery piece by adopting a laser scribing method; and the opposite battery pieces are adsorbed by the suction disc, and then the whole suction disc is rotated for 180 degrees to carry out piece arrangement.
S4: preparing a first pre-composite part and placing a first adhesive tape group with an adhesive surface upwards at a station at the downstream of the last battery piece, wherein the first pre-composite part comprises a second welding band group and a second adhesive tape group, the second welding band group comprises a first section and a second section, the adhesive surface of the second adhesive tape group is downwards, the first section of the second welding band group is adhered below the second adhesive tape group, and the second section of the second welding band group extends towards the downstream direction of the battery string.
As shown in fig. 16, the second tape set and the second tape set are combined into a first pre-composite at the tape position, and the placement of the battery cells is performed at step S6.
The method of preparing the first pre-composite comprises:
The second tape set is pulled out of the target length and then cut so that the tape set is on the composite carrier 541, and the second tape set is placed over the first section of the second tape set to form the first pre-composite.
Specifically, the following steps are performed by using the welding strip composite preparation device 5:
S41, moving a first composite carrying platform 541 to a welding strip group material-taking station, and sequentially pulling out the welding strip group from the welding strip material roll 51 by a strip pulling hand 55 through a first pressing mechanism 52, a second pressing mechanism 57 and a cutting mechanism 53, wherein the corresponding second composite carrying platform 541 is positioned at the welding strip group material-feeding station;
S42, after the welding strip group is pulled out by a target length, the cutting mechanism 53 cuts the welding strip group, the strip pulling hand 55 places the cut welding strip section on the first composite piece carrying platform 541, and the first composite piece carrying platform 541 adsorbs and positions the welding strip section opposite to the first composite piece carrying platform 541; carrying the welding strip group and carrying the pre-composite part by adopting the same carrying mechanism and carrying the welding strip group and the pre-composite part by utilizing the suction effect of negative pressure;
S43, resetting the handle 55 to the side close to the cutting mechanism 53, placing the adhesive tape group on the composite carrying platform 541 of the station to be taken, and forming a welding tape composite (a first pre-composite) by the welding tape section and the adhesive tape group, wherein when the handle 55 is reset, the adhesive tape carrying mechanism 56 is controlled to synchronously move towards the side close to the handle 55;
S44, the first composite carrying platform 541 is moved out to the composite feeding position, and the second composite carrying platform 541 is synchronously moved to the station to be extracted by the welding strip group.
In the preparation and grabbing process of the adhesive tape group and the pre-composite part, any part contacted with the adhesive surface of the adhesive tape group (comprising the first adhesive tape group and the second adhesive tape group) is made of a non-sticky material.
The tape carrying mechanism 56 moves along with the tape pulling handle 55, so that the tape pulling handle 55 does not need to additionally carry out avoiding action when the tape carrying mechanism carries out tape carrying, and the action beat of equipment is saved; the composite carrying platform 541 is used for continuously supplying composite to the feeding position in a circulating manner, and the other composite carrying platform 541 is used for taking materials during feeding, so that the waiting time of the equipment can be further shortened, and the productivity of the equipment can be improved. In the implementation method, the welding belt group can be placed first, then the adhesive tape group with the adhesive surface downwards is placed, so that the corresponding composite part can be formed, and the welding belt group can be placed first, then the adhesive tape group with the adhesive surface upwards is placed, so that the required composite part can be formed.
And preparing a second tape group by adopting a second tape slitting and pitch-changing mechanism.
The second adhesive tape group is obtained by pulling out the whole roll of adhesive tape, cutting the whole roll of adhesive tape, and then changing the distance.
The method for cutting the whole roll of adhesive tape after being pulled out comprises the following steps: as shown in fig. 6, the whole roll of tape is pulled out, and as shown in fig. 7, a plurality of cutters 433 cut the tape from above and/or below the tape in a direction parallel to the tape pulling-out direction.
The method of performing the pitch change includes, as shown in fig. 8, guiding the slit tape set to the plurality of guide grooves 461A, and pulling apart the plurality of tapes of the tape set.
S5: and attaching a second adhesive tape group of the first pre-composite piece above the upper battery piece, wherein a second section of the second adhesive tape group is above the first adhesive tape group of a station at the downstream of the upper battery piece.
Since there are two composite carriers 541, as shown in fig. 17, the step S4 and the step S5 can be performed simultaneously, so as to improve the preparation efficiency of the battery string.
S6: the battery piece is placed over the second sections of the first tape group and the second solder group at a station downstream of the last battery piece.
Before the battery piece is placed, the whole battery piece is divided into small battery pieces by adopting the battery piece feeding mechanism 2, and then the battery pieces are arranged.
Dividing the whole battery piece into small battery pieces by adopting a laser scribing method; and (5) carrying out sheet tidying by a rotating method.
And (3) compacting the tape groups on the upper and lower surfaces of the battery piece by adopting a battery piece composite part compacting device.
Step S6 and step S4 are performed simultaneously, so that efficiency is improved.
After the bonding work is completed, the material receiving platform 1 is moved. The first adhesive tape group, the second adhesive tape group and the welding tape group are prepared in advance through relatively fixed stations, at the moment, the complex preparation devices can be moved without moving by controlling the material receiving platform 1, only fixed program actions are executed, and the battery string forming precision can be improved in a simple mode.
S7: and repeating the steps S4 to S6 until the placement of the last battery piece is completed.
As a preferred embodiment, step S8 and step S9 are also included.
S8: preparing a second pre-composite piece, wherein the second pre-composite piece comprises a third welding band group and a second adhesive band group, the third welding band group comprises a first section and a second section, the adhesive surface of the second adhesive band group faces downwards, the first section of the third welding band group is stuck below the second adhesive band group, and the second section of the third welding band group extends out towards the downstream direction of the battery string.
S9: and attaching a second adhesive tape group of the second pre-composite piece above the last battery piece.
The method of making the second pre-composite is substantially the same as the method of making the first pre-composite, except that the second and third sets of weld beads are different in length.
As shown in fig. 18, after one receiving platform 1 completes the interconnection of the battery strings, the second receiving platform moves to the first adhesive tape position to continue to interconnect the battery strings, so as to realize the alternate action of the two receiving platforms 1.
As a third embodiment of the present invention, there is provided a method for interconnecting photovoltaic cells without main grid, using the interconnection system without main grid of the first embodiment, the interconnection method for photovoltaic cells without main grid being substantially the same as the method of the third embodiment except for steps S1 to S7, in which:
s8: preparing a first pre-composite part, wherein the first pre-composite part comprises a second welding band group and a second adhesive tape group, the second welding band group comprises a first section and a second section, the adhesive surface of the second adhesive tape group is downward, the first section of the second welding band group is stuck below the second adhesive tape group, and the second section of the second welding band group extends out towards the downstream direction of the battery string; and placing the first adhesive tape group with the adhesive surface upwards at the initial end on the next material receiving platform, wherein the initial end of the material receiving platform is positioned at the upstream of the next battery string.
The second welding band group can be used as a first welding band group of the next material receiving platform.
S9: the second adhesive tape group of the first pre-composite piece is attached to the upper side of the last battery piece, and the second section of the second welding tape group is arranged on the upper side of the first adhesive tape group of the next material receiving platform.
The last battery piece of the previous material receiving platform and the second welding band group of the first battery piece of the next material receiving platform can be cut through a cutting device.
S10: repeating steps S3 to S9, continuously interconnecting a plurality of battery strings.
The preparation of the pre-composite part and the placement of the battery piece and the lamination of the pre-composite part and the battery piece are performed simultaneously, so that an infrared welding method is avoided, the interconnection efficiency and the connection quality of the battery string are improved, and the method has the following advantages that:
1. the defects of the traditional welding process are overcome, the adhesive tape preparation process is fast, the welding time can be omitted, the influence of temperature on the welding effect is not required to be considered, the process is simple, and the automation efficiency is high;
2. the needed adhesive tape sections are manufactured in a tape cutting mode, and compared with the traditional mode of replacing the adhesive tape disc, the material replacing mode is simpler, and the deflection of the positions of the adhesive tape sections can be effectively prevented;
3. the pre-composite piece is prepared for standby, so that the material receiving platform can prepare required components in the process of streaming, the waiting time for supplying the adhesive tape can be effectively shortened, and the productivity of the device can be improved;
4. the material receiving platform can circularly and alternately act, so that the continuity of battery piece string making can be ensured, and the string making efficiency can be improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The interconnection method of the photovoltaic cell without the main grid is characterized by comprising the following steps of:
s1: placing a first adhesive tape group with an upward adhesive surface at the initial end on a material receiving platform, wherein the initial end of the material receiving platform is positioned at the upstream of a battery string;
S2: the first welding strip group comprises a first section and a second section, the second section of the first welding strip group is arranged above the first adhesive tape group, and the first section of the first welding strip group extends out towards the upstream direction of the battery string;
S3: placing a first battery piece above a first tape group;
S4: preparing a first pre-composite part and placing a first adhesive tape group with an upward adhesive surface at a station at the downstream of the last battery piece, wherein the first pre-composite part comprises a second welding band group and a second adhesive tape group, the second welding band group comprises a first section and a second section, the adhesive surface of the second adhesive tape group is downward, the first section of the second welding band group is adhered below the second adhesive tape group, and the second section of the second welding band group extends out towards the downstream direction of the battery string;
S5: attaching a second adhesive tape group of the first pre-composite part above the upper battery piece, wherein a second section of the second adhesive tape group is above the first adhesive tape group of a station at the downstream of the upper battery piece;
s6: placing the battery piece above the first tape group and the second section of the second welding tape group of a station at the downstream of the last battery piece;
S7: and repeating the steps S4 to S6 until the placement of the last battery piece is completed.
2. The method of interconnecting photovoltaic cells without primary grids according to claim 1, wherein step S6 is performed simultaneously with step S4.
3. The method of interconnecting photovoltaic cells without primary grids according to claim 1, wherein in step S4, the method of preparing the first pre-composite comprises:
Pulling out the second welding strip group to a target length and then cutting the second welding strip group so that the second welding strip group is positioned on the composite part carrying platform; a second tape set is placed over the first section of the second tape set to form a first pre-composite.
4. The method of interconnecting photovoltaic cells without primary grids according to claim 1, wherein in step S3 and step S6, the whole cell is divided into small cells before being placed, and then the cells are sorted.
5. The interconnection method of the photovoltaic cells without main grids according to claim 4, wherein the whole cell is divided into small cells by a laser scribing method; and (5) carrying out sheet tidying by a rotating method.
6. The method of interconnecting a photovoltaic cell without primary grids according to claim 1, wherein the first tape set and the second tape set are obtained by pulling out the whole roll of tape, slitting the whole roll of tape, and then performing pitch-shifting.
7. The method of interconnecting photovoltaic cells without primary grids according to claim 6, wherein the method of slitting the whole roll of tape after being pulled out comprises pulling out the whole roll of tape, and wherein the plurality of cutters slit the tape from above and/or below the tape, and wherein the direction of the slits is parallel to the direction of tape pulling out.
8. The method of interconnecting photovoltaic cells without primary grids according to claim 6, wherein the pitch-changing method comprises guiding the slit tape sets to a plurality of guiding grooves, and pulling apart the plurality of tapes of the tape sets.
9. An interconnection system for a photovoltaic cell without a primary grid, comprising: the device comprises a battery piece feeding mechanism, a battery piece carrying mechanism, a material receiving platform, a welding strip composite part preparation device, an adhesive tape slitting and distance changing mechanism and a welding strip material roll; the tape cutting and distance changing mechanism comprises a first tape cutting and distance changing mechanism and a second tape cutting and distance changing mechanism;
the battery piece feeding mechanism is used for preparing battery pieces;
the battery piece carrying mechanism is used for carrying battery pieces to the receiving platform;
the first tape slitting and distance changing mechanism is used for preparing a first tape group, and the adhesive surface of the first tape group faces upwards;
The second tape slitting and distance changing mechanism is used for preparing a second tape group, and the adhesive surface of the second tape group faces downwards;
the welding strip material roll is used for providing a welding strip group;
The welding strip composite part preparation device is used for preparing a first pre-composite part and a second pre-composite part, the first pre-composite part comprises a second adhesive tape group and a second welding tape group, the second welding tape group comprises a first section and a second section, and the adhesive surface of the second adhesive tape group faces downwards; the first section of the second welding strip group is stuck below the second adhesive strip group, and the second section of the second welding strip group extends out towards the downstream direction of the battery string; the second adhesive tape group of the first pre-composite piece is attached to the upper part of the upper battery piece, and the second section of the second welding tape group is attached to the upper part of the first adhesive tape group of a station at the downstream of the upper battery piece; the second pre-composite comprises a second adhesive tape group and a third adhesive tape group, the third adhesive tape group comprises a first section and a second section, the adhesive surface of the second adhesive tape group faces downwards, and the first section of the third adhesive tape group is adhered below the second adhesive tape group; the second adhesive tape group of the second pre-composite piece is attached above the last battery piece, the second section of the third welding band group extends out towards the downstream direction of the battery string, and the length of the third welding band group is smaller than that of the second welding band group.
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| CN202311682954.0A CN117438504B (en) | 2023-12-08 | 2023-12-08 | Interconnection method and interconnection system for photovoltaic cells without main grid |
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| CN202311682954.0A CN117438504B (en) | 2023-12-08 | 2023-12-08 | Interconnection method and interconnection system for photovoltaic cells without main grid |
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| JP5377019B2 (en) * | 2009-03-23 | 2013-12-25 | 三洋電機株式会社 | Manufacturing method of solar cell module |
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| CN115207166A (en) * | 2022-09-15 | 2022-10-18 | 苏州小牛自动化设备有限公司 | Battery string making method and battery string making equipment |
| CN115621369A (en) * | 2022-12-19 | 2023-01-17 | 苏州智慧谷激光智能装备有限公司 | Adhesive tape laying device and method for serially connected battery pieces |
| CN115863483A (en) * | 2022-12-21 | 2023-03-28 | 李晶 | Photovoltaic cell string buffer layer manufacturing device and method |
| CN219497816U (en) * | 2023-05-05 | 2023-08-08 | 苏州智慧谷激光智能装备有限公司 | Main-grid-free battery string series connection equipment |
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