CN115411145B - Welding device and method for solar cell - Google Patents
Welding device and method for solar cellInfo
- Publication number
- CN115411145B CN115411145B CN202211091437.1A CN202211091437A CN115411145B CN 115411145 B CN115411145 B CN 115411145B CN 202211091437 A CN202211091437 A CN 202211091437A CN 115411145 B CN115411145 B CN 115411145B
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- welding
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- shaped
- guide groove
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F71/00—Manufacture or treatment of devices covered by this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/0426—Fixtures for other work
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
- H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F71/00—Manufacture or treatment of devices covered by this subclass
- H10F71/137—Batch treatment of the devices
- H10F71/1375—Apparatus for automatic interconnection of photovoltaic cells in a module
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/50—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for positioning, orientation or alignment
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
本发明公开了一种太阳能电池片的焊接装置，包括带导正槽的施压件和加热焊接单元；施压件可与电池片产生相对平移；在相对平移过程中，导正槽可上下浮动，且导正槽始终压在电池片表面的条状焊接材料上，并导正槽导正条状焊接材料的布设方向；加热焊接单元可对条状焊接材料进行直接加热和/或间接加热，使条状焊接材料受热并完成与电池片的焊接。本发明还提供一种太阳能电池片的焊接方法，采用上述的焊接装置，在电池片表面焊接条状焊接材料。本发明可提升电池片表面金属焊丝焊接精度；可解决小面积接触焊接难度大的问题，使得超细超多焊丝焊接工艺得以实现；可解决异形焊丝无法焊接问题；可解决电池片表面焊丝多无法焊接问题。
The present invention discloses a welding device for solar cell sheets, comprising a pressure piece with a guiding groove and a heating welding unit; the pressure piece can produce relative translation with the cell sheet; during the relative translation process, the guiding groove can float up and down, and the guiding groove is always pressed on the strip welding material on the surface of the cell sheet, and the guiding groove guides the layout direction of the strip welding material; the heating welding unit can directly and/or indirectly heat the strip welding material, so that the strip welding material is heated and completes the welding with the cell sheet. The present invention also provides a welding method for solar cell sheets, using the above-mentioned welding device to weld the strip welding material on the surface of the cell sheet. The present invention can improve the welding accuracy of metal welding wire on the surface of the cell sheet; can solve the problem of difficulty in small-area contact welding, so that the welding process of ultra-fine and ultra-multi welding wire can be realized; can solve the problem that special-shaped welding wire cannot be welded; can solve the problem that there are too many welding wires on the surface of the cell sheet and cannot be welded.
Description
Technical Field
The invention relates to the field of photovoltaics, in particular to a welding device and method for solar cells.
Background
The solar photovoltaic module battery piece serial connection method generally uses tin-coated copper strips or tin-coated copper wires to be respectively welded on the front and back silver electrodes of the battery piece, the number of welding strips or welding wires welded on one side of a single battery piece is generally 2-20, the number of welding strips or welding wires is generally 2-20, the number of welding strips is small, the cross section of the welding strips is generally flat, and the number of welding wires is large. The more the number of welding wires on the surface of the battery piece is, the smaller and finer the sectional area of a single welding wire is required, for example, the number of the welding wires is 9, the wire diameter of the welding wires is generally 0.32-0.35 mm, the number of the welding wires is more than 15, and the wire diameter of the welding wires is generally 0.25-0.3 mm. The welding method generally uses clamping jaws to simultaneously clamp and slightly stretch welding wires at two ends of a plurality of welding wires to extend a bit so as to straighten the welding wires, then transfers the welding wires to the surface of a battery piece, places the welding wires on a surface electrode, vertically places a plurality of wire pressing or briquetting flows on the welding wires so as to enable the welding wires to be only attached to the surface electrode of the battery piece, and heats the battery piece and the battery piece through an infrared heating pipe above so as to enable the welding wires to be welded with the electrode of the battery piece.
The conventional welding method has the main defect that ① has low welding precision. The welding strip or the carrying flow of the welding wire is aligned with the electrode of the battery piece, and then gravity pressing is applied to the partial point, so that the welding wire is easy to deviate due to the integral mechanical control process, the round structure of the welding wire and the characteristic that the welding wire is easy to expand and bend when heated, the actual welding condition is that the welding wire deviates from the center of the electrode seriously, in general actual production, a welding pad with the size slightly larger than the wire diameter of the welding wire is arranged on the electrode, and the welding wire is required to not deviate from the welding pad after the welding is finished, but the welding quality and the assembly performance of the battery piece are reduced. ② The weld design area cannot be too small. Because the welding accuracy is low, if the designed welding area is too small, the welding wire is deviated from the welding area, and the welding cannot be formed. In addition, the welding wire has few points except the pressed points, the rest part is hardly well attached to the battery plate electrode, and even many places are not contacted at all, only the distance between the two parts is very small. After the battery piece and the welding wire are heated, tin on the welding wire starts to melt and flows downwards to touch the electrode of the battery piece, the welding joint can be formed at the position where the molten tin and the electrode touch, the welding joint cannot be formed at the position where the molten tin and the electrode touch, if the electrode area is too small and the welding belt is offset, a better touch surface is difficult to form, and a better welding effect cannot be formed. Therefore, in actual production, only the welding effect at the welding pads with larger area is good, the extremely fine electrode grid lines between the welding pads are hardly formed by welding, or the welding effect is poor, and the welding quality of the area is generally not required. ③ The special-shaped welding strip cannot be welded. With the technical development of photovoltaic modules, special-shaped welding strips are increasingly used, the wire diameters are increasingly smaller, and particularly, the special-shaped welding strips are triangular welding wires with low shading to battery pieces, the structure of the special-shaped welding strips determines that the directionality of the welding wires needs to be considered in welding, and the problem is basically not considered in the conventional welding wire fixing process, so that welding of the special-shaped welding wires cannot be realized.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a welding device for a solar cell, which comprises:
The pressure application part is provided with a guide groove, the pressure application part can generate relative translation with a battery piece needing to be welded with the strip-shaped welding material, the guide groove on the pressure application part faces the battery piece, the guide groove can be used for allowing the corresponding strip-shaped welding material to pass, in the relative translation process, the guide groove is pressed on the corresponding strip-shaped welding material on the surface of the battery piece, and the guide groove is guided to the arrangement direction of the corresponding strip-shaped welding material (namely, the extension direction of the guide strip-shaped welding material on the surface of the battery piece) so as to enable the strip-shaped welding material to extend according to the preset arrangement direction;
And the heating and welding unit can directly heat and/or indirectly heat the strip-shaped welding material at the position of the guide groove (the area near the guide groove can be also included) in the relative translation process, so that the strip-shaped welding material is heated and the welding with the battery piece is completed.
The embodiment of the invention relates to a welding device for solar cells.
The invention also provides a welding method of the solar cell, which adopts the welding device to weld the strip-shaped welding material on the surface of the cell, and when in welding, the pressing piece and the cell are subjected to relative translation (the relative translation direction is the preset arrangement direction of the strip-shaped welding material), and in the relative translation process:
the guide groove on the pressing piece is pressed on the corresponding strip-shaped welding material on the surface of the battery piece, and the guide groove is opposite to the arrangement direction of the strip-shaped welding material (namely, the extension direction of the guide strip-shaped welding material on the surface of the battery piece), so that the strip-shaped welding material extends according to the preset arrangement direction;
And the heating and welding unit directly heats and/or indirectly heats the strip-shaped welding materials at the positions of the guide grooves (the areas near the guide grooves can be included), so that the strip-shaped welding materials are heated and the welding with the battery piece is completed.
The welding device and the method for the solar cell have the advantages that the welding precision of the metal welding wire on the surface of the cell can be improved, the problem of high difficulty in small-area contact welding can be solved, the ultra-fine ultra-multiple welding wire welding process can be realized, the problem that special-shaped welding wires cannot be welded can be solved, and the problem that more welding wires on the surface of the cell cannot be welded can be solved.
The invention has the following characteristics:
1) According to the invention, each strip-shaped welding material (welding wire or welding strip) is independently positioned through the pressing piece, and certain pressure is applied to the strip-shaped welding material, so that the strip-shaped welding material can be completely attached to the battery plate electrode all the time in the running process;
2) The pressing piece can be in the forms of a spring plate, a swing rod, a roller and the like, and only needs to apply pressure to strip-shaped welding materials (welding wires or welding strips) and float up and down to be compatible with tiny height fluctuation;
3) The invention can heat the contact point of the strip welding material (welding wire or welding belt) and the electrode and the nearby area to melt the soldering tin, and can form welding with the electrode when the strip welding material (welding wire or welding belt) slides out of the pressing piece, and the heating welding unit can be combined with the pressing piece into a whole or arranged separately;
4) The heating mode of the heating welding unit can be hot air, infrared, electromagnetic, inductive, resistance wire conduction, current conduction and other heating modes, and only the requirement of heating the welding belt to the tin melting temperature is met;
5) The depth of the guide groove is slightly smaller than the thickness/height of the strip-shaped welding material (welding wire or welding strip), and one part of the strip-shaped welding material is pressed in the groove, and the other part of the strip-shaped welding material is exposed so as to be convenient for contacting with a battery electrode;
6) The position and the direction of the strip-shaped welding material (welding wire or welding strip) are completely determined by the pressing piece/the guide groove, so that the position precision and the direction of the strip-shaped welding material can be ensured, the strip-shaped welding material is always contacted with the battery piece and certain pressure is applied, and the welding effect of each point on the strip-shaped welding material can be ensured;
7) The welding device is characterized in that a plurality of strip-shaped welding materials (welding wires or welding strips) are welded at the same time, each strip-shaped welding material corresponds to an independent guide groove, each guide groove can independently float up and down and is not interfered with each other, and the upper error and the lower error of each strip-shaped welding material during welding can be well compatible, which is very critical in that in the welding process, the battery piece cannot be absolutely parallel to the pressing piece/guide groove, the surface of the electrode of the battery piece is uneven, the height between the electrode and the electrode, and between the guide groove and the guide groove is not absolutely equal, and the pressing piece/guide groove is necessarily required to be kept to float up and down in a certain range along with the welding, so that each strip-shaped welding material is pressed by the guide groove at any time, and the full contact between the strip-shaped welding material wire and the electrode is ensured.
Compared with the prior art, the invention has the following advantages:
1) The invention can guide the strip welding material (welding wire or welding strip) in real time by the pressing piece provided with the guide groove, so that the strip welding material is always kept in the preset arrangement direction (electrode grid line), and the welding is finished immediately after the guide is finished, thereby greatly improving the welding precision.
2) The invention can realize high-precision control, the strip welding material (welding wire or welding strip) and the electrode grid line are not easy to deviate, so that small-area welding is possible, and extremely fine welding with a plurality of welding wires is realized.
3) The pressing piece of the invention guides and corrects the arrangement direction of strip welding materials (welding wires or welding strips) at the same time, so that welding of welding wires with special-shaped structures such as triangles and the like can be realized.
4) The invention can independently guide and correct a plurality of strip-shaped welding materials (welding wires or welding strips) without interfering with each other, and can lead each strip-shaped welding material (welding wires or welding strips) to be independently stressed and independently guided, so that the simultaneous welding of a plurality of strip-shaped welding materials (welding wires or welding strips) can be realized, and the minimum spacing between the welding wires can be less than 1mm.
Drawings
Fig. 1 to 4 are schematic views of the present invention.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The invention provides a solar cell welding device, comprising:
The pressure applying piece is provided with a guide groove, the pressure applying piece can generate relative translation with a battery piece needing to be welded with the strip-shaped welding material, the guide groove on the pressure applying piece faces the battery piece, the cross section shape of the guide groove is matched with that of the corresponding strip-shaped welding material, the depth of the guide groove is not greater than the thickness of the corresponding strip-shaped welding material, in the relative translation process, the guide groove presses the corresponding strip-shaped welding material on the surface of the battery piece, and the guide groove guides the corresponding strip-shaped welding material in the arrangement direction (namely, the extension direction of the guide strip-shaped welding material on the surface of the battery piece) to enable the strip-shaped welding material to extend according to the preset arrangement direction, and in the relative translation process, the pressure applying piece can float up and down relative to the surface of the battery piece to enable the guide groove to be pressed on the corresponding strip-shaped welding material on the surface of the battery piece at all times;
The heating welding unit can directly heat and/or indirectly heat the strip-shaped welding material at the position of the guide groove (the area near the guide groove can be included) in the relative translation process, so that the strip-shaped welding material is heated and the welding with the battery piece is finished;
And the translation driving unit enables the pressing piece and the battery piece to generate relative translation, the direction of the relative translation is the preset arrangement direction of the strip-shaped welding materials, and the translation driving unit also enables the heating welding unit and the pressing piece to synchronously translate.
Specifically, the strip-shaped welding material is a welding strip or a welding wire, and the cross section of the strip-shaped welding material is circular, triangular or rectangular.
If a plurality of parallel strip-shaped welding materials are required to be welded on the surface of the battery piece, the specific scheme of the pressing piece comprises the following steps:
1) Scheme one:
The pressing piece is provided with a plurality of guide grooves which face the battery piece, the guide grooves are arranged side by side (the arrangement direction of the guide grooves is mutually perpendicular to the preset arrangement direction of the strip-shaped welding materials), the guide grooves are in one-to-one correspondence with the strip-shaped welding materials, the guide grooves can be used for the corresponding strip-shaped welding materials to pass through, the cross section shape of the guide grooves is matched with the shape of the corresponding strip-shaped welding materials, and the depth of the guide grooves is not greater than the thickness of the corresponding strip-shaped welding materials;
The heating and welding unit can directly heat and/or indirectly heat the strip-shaped welding materials at each guide groove (the area near each guide groove can be included) at the same time (in the relative translation process), so that each strip-shaped welding material is heated and the welding with the battery piece is completed.
Specifically, in scheme one:
The pressing piece provided with the plurality of guide grooves is an elastic pressing piece, the elastic pressing piece comprises a pressing end facing the battery piece, and the pressing end of the elastic pressing piece is provided with the plurality of guide grooves. More specifically, the pressing end of the elastic pressing piece is divided into a plurality of pressing strips facing the battery piece, and one or more guide grooves are respectively arranged at the end part of each pressing strip facing the battery piece. In the relative translation process, the pressing strip can float up and down relative to the surface of the battery piece, so that the guide groove at the end part of the pressing strip always presses on the corresponding strip-shaped welding material on the surface of the battery piece. The elastic pressing piece is also provided with a threading hole for guiding the strip-shaped welding material to lean against the guide groove, and the strip-shaped welding material passes through the threading hole and then passes through the guide groove in the relative translation process. In the detailed view of fig. 1, in fig. 1, welding wires with equilateral triangle (the side length of a triangle is 0.13 mm) are adopted as strip-shaped welding materials, each welding wire is controlled by one pressing strip on an elastic pressing sheet, a guide groove at the end part of the pressing strip is a V-shaped groove, the vertex angle of the V-shaped groove is 60 degrees, the maximum depth of the V-shaped groove is 0.1mm, the welding wires are pulled into the guide groove at the end part of the pressing strip through a threading hole on the elastic pressing sheet, in the welding process, each pressing strip independently gives pressure to the corresponding welding wire, the superposition compaction of each welding wire and an electrode grid line on a battery piece (the extending direction of the electrode grid line is the preset arrangement direction of the welding wire) can be ensured, a heating wire or a heating rod is adopted as a heating welding unit, the elastic pressing sheet is integrally heated through the heating wire, the welding wire passes through the elastic pressing sheet and is contacted, the welding wire is heated to the melting temperature in the process of melting tin melting on the welding wire, and the welding wire is welded onto the electrode grid line on the surface of the battery piece when the welding wire slides out from the guide groove at the bottom of the elastic pressing sheet.
The side peripheral surface of the pressing wheel faces towards the battery piece, the side peripheral surface of the pressing wheel is provided with a plurality of guide grooves, and the guide grooves are annular grooves coaxial with the pressing wheel. More specifically, the pinch roller is a soft wheel. In the relative translation process, the pressing wheel (soft wheel) can float up and down relative to the surface of the battery piece, so that the guide groove on the side peripheral surface of the pressing wheel is always pressed on the corresponding strip-shaped welding material on the surface of the battery piece. In detail, as shown in fig. 2, the strip welding material adopts welding wires with equilateral triangle (the side length of the triangle is 0.13 mm), the guide groove on the side circumferential surface of the pressing wheel is a V-shaped groove, the depth of the V-shaped groove is 0.5mm, the vertex angle of each welding wire is 60 DEG, each welding wire is pressed down by one guide groove on the side circumferential surface of the pressing wheel, the vertex angle of the welding wire is pressed on an electrode grid line of a battery piece by the pressing wheel, the side circumferential surface/the guide groove is flexibly contacted with the vertex angle of the welding wire, one downward pressure is applied to the welding wire from the vertex angle, the height difference between different welding wires can be compatible, the mutual independence between the welding wires and the electrode grid line can be ensured, each point between the welding wires and the electrode grid line (the extending direction of the electrode grid line is the preset arrangement direction of the welding wires), the heating welding unit adopts an infrared heating tube, and the infrared heating tube heats the welding wires at the pressing wheel and the nearby area, so that the welding tin on the welding wire is melted and welded on the electrode grid line.
2) Scheme II:
The plurality of pressing pieces are in one-to-one correspondence with the plurality of strip-shaped welding materials, the plurality of pressing pieces can translate synchronously, the guide grooves on the plurality of pressing pieces face the battery piece, the guide grooves on the plurality of pressing pieces are arranged side by side (the arrangement direction of the guide grooves is mutually perpendicular to the preset arrangement direction of the strip-shaped welding materials), the guide grooves are in one-to-one correspondence with the strip-shaped welding materials, the guide grooves can allow the corresponding strip-shaped welding materials to pass through, the cross section shape of the guide grooves is matched with the shape of the corresponding strip-shaped welding materials, and the depth of the guide grooves is not larger than the thickness of the corresponding strip-shaped welding materials;
The heating and welding unit can directly heat and/or indirectly heat the strip-shaped welding materials at each guide groove (the area near each guide groove can be included) at the same time (in the relative translation process), so that each strip-shaped welding material is heated and the welding with the battery piece is completed.
Specifically, in scheme two:
The plurality of pressing pieces are a plurality of pressing rods, the plurality of pressing rods are arranged side by side, the plurality of pressing rods respectively comprise pressing ends facing the battery piece, and the pressing ends of the plurality of pressing rods are respectively provided with a guide groove. More specifically, each pressure lever is respectively provided with a swing lever mechanism for pressing the pressing end of the pressure lever to the battery piece, and the pressure lever is used as a swing lever in the swing lever mechanism (a plurality of pressure levers can swing around the same axis). In the relative translation process, the pressing end of the pressing rod can float up and down relative to the surface of the battery piece, so that the guide groove of the pressing end is always pressed on the corresponding strip-shaped welding material on the surface of the battery piece. The pressure lever is also provided with a threading hole for guiding the strip welding material to lean against the guide groove, and the strip welding material passes through the threading hole and then passes through the guide groove in the relative translation process. In the detailed view of FIG. 3, in FIG. 3, a flat welding strip with the width of 0.3mm and the thickness of 0.1mm is adopted as a strip welding material, a guide groove at the pressing end of the bottom of the pressing rod is a rectangular groove, the depth of the rectangular groove is 0.05mm, the width of the rectangular groove is 0.35mm, a small bearing is arranged on the pressing rod, the pressing rod is used as a swinging rod in a swinging rod mechanism, the swinging rod mechanism comprises a spring for pressing the pressing end of the pressing rod to a battery piece, a threading hole is further arranged on the pressing rod, the welding strip passes through the threading hole and is pulled into the guide groove at the bottom of the pressing rod, the whole pressing rod is in an inclined state above the battery piece, the pressing rod can rotate through the small bearing on the pressing rod, a spring is arranged at the upper end of the pressing rod for increasing the pressure of the pressing rod to enable the guide groove at the bottom of the pressing rod to apply larger pressure to the welding wire through the stretching of the spring. Each welding wire corresponds to one pressing rod, the rotation of each pressing rod is supported by a small bearing on the pressing rod, each pressing rod is mutually independent, the pressing ends/the guide grooves can float up and down in a certain height range through rotation of the pressing rods, the heating welding unit adopts a current heating mode, direct current is conducted between the pressing rods and the metal guide wheels, a welding belt between the metal guide wheels and the pressing rods heats and melts tin, and when the welding belt is pressed and contacted on an electrode on the surface of a battery piece by the pressing rods, the welding belt is welded with the electrode together through the molten tin.
The side circumferential surfaces of the pressing wheels face the battery piece, the side circumferential surfaces of the pressing wheels are respectively provided with a guide groove, and the guide grooves are annular grooves coaxial with the pressing wheels. More specifically, each press wheel is respectively provided with a swing rod mechanism for pressing the lateral peripheral surface of the press wheel to the battery piece, and the press wheels are hinged with swing rods in the swing rod mechanism. In the relative translation process, the pressing wheel can float up and down relative to the surface of the battery piece, so that the guide groove on the side peripheral surface of the pressing wheel always presses on the corresponding strip-shaped welding material on the surface of the battery piece. In the figure 4, the welding wire with circular cross section is adopted as the welding wire, the diameter of the welding wire is 0.2mm, the guide groove on the side circumferential surface of the pressing wheel is a semicircular groove with the depth of 0.1mm, a small bearing is arranged on the pressing rod, the pressing rod is used as the swinging rod in the swinging rod mechanism, the swinging rod mechanism comprises a spring for pressing the lower end of the swinging rod towards a battery piece, the swinging rod is provided with the small bearing and a threading hole, the welding wire passes through the threading hole and is pulled into the guide groove of the pressing wheel at the bottom of the swinging rod, the whole swinging rod is in an inclined state above the battery piece, the swinging rod can rotate through the small bearing on the swinging rod, the spring is arranged at the upper end of the swinging rod for increasing the pressure of the welding wire, the pressing wheel at the bottom of the swinging rod applies larger pressure to the welding wire through the stretching of the spring, each welding wire corresponds to one swinging rod, the rotation of each swinging rod is supported by the small bearing on the swinging rod, each swinging rod is mutually independent, the pressing wheel/the guide groove can float up and down in a certain height range through the swinging rod, the hot air gun is adopted by the welding unit, the hot air gun is aligned with the compacted position of the pressing wheel and the welding wire is blown to the welding wire.
The invention also provides a welding method of the solar cell, which adopts the welding device to weld the strip-shaped welding material on the surface of the cell, and when in welding, the pressing piece and the cell are subjected to relative translation (the relative translation direction is the preset arrangement direction of the strip-shaped welding material), and in the relative translation process:
the guide groove on the pressing piece is pressed on the corresponding strip-shaped welding material on the surface of the battery piece, and the guide groove is opposite to the arrangement direction of the strip-shaped welding material (namely, the extension direction of the guide strip-shaped welding material on the surface of the battery piece), so that the strip-shaped welding material extends according to the preset arrangement direction;
And the heating and welding unit directly heats and/or indirectly heats the strip-shaped welding materials at the positions of the guide grooves (the areas near the guide grooves can be included), so that the strip-shaped welding materials are heated and the welding with the battery piece is completed.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (17)
1. A solar cell welding apparatus, comprising:
The pressure application piece is provided with a guide groove, the pressure application piece can generate relative translation with a battery piece needing to be welded with the strip-shaped welding material, the guide groove on the pressure application piece faces the battery piece, the guide groove can be used for allowing the corresponding strip-shaped welding material to pass, in the relative translation process, the guide groove presses the corresponding strip-shaped welding material on the surface of the battery piece, the guide groove guides the strip-shaped welding material in the extending direction of the surface of the battery piece, so that the strip-shaped welding material extends according to the preset arrangement direction;
The heating and welding unit can directly heat and/or indirectly heat the strip-shaped welding materials at the guide groove in the relative translation process, so that the strip-shaped welding materials are heated and the welding with the battery piece is completed;
The direction of the relative translation is the preset arrangement direction of the strip-shaped welding materials;
the pressure applying piece is also provided with a threading hole for guiding the strip-shaped welding material to lean against the guide groove, and the strip-shaped welding material passes through the threading hole and then passes through the guide groove in the relative translation process.
2. The welding device for solar cells according to claim 1, wherein the surface of the cell requires welding a plurality of strip-shaped welding materials;
The pressing piece is provided with a plurality of guide grooves which face the battery piece, the guide grooves are arranged side by side and correspond to the strip-shaped welding materials one by one, in the relative translation process, the guide grooves are pressed on the corresponding strip-shaped welding materials on the surface of the battery piece, and the guide grooves are opposite to the arrangement direction of the strip-shaped welding materials;
The heating and welding unit can directly heat and/or indirectly heat the strip-shaped welding materials at the position of each guide groove at the same time, so that each strip-shaped welding material is heated and is welded with the battery piece.
3. The welding device for solar cells according to claim 1, wherein the surface of the cell requires welding a plurality of strip-shaped welding materials;
The plurality of pressing pieces can translate synchronously, the guide grooves on the plurality of pressing pieces face the battery piece, the guide grooves on the plurality of pressing pieces are arranged side by side and correspond to the strip-shaped welding materials one by one, and in the relative translation process, the guide grooves are pressed on the corresponding strip-shaped welding materials on the surface of the battery piece and correspond to the arrangement direction of the strip-shaped welding materials;
The heating and welding unit can directly heat and/or indirectly heat the strip-shaped welding materials at the position of each guide groove at the same time, so that each strip-shaped welding material is heated and is welded with the battery piece.
4. The solar cell welding apparatus according to claim 1,2 or 3, further comprising a translation driving unit for translating the pressing member and the cell relative to each other.
5. The welding device for solar cells according to claim 4, wherein the translational drive unit further translates the heating welding unit in synchronization with the pressing member.
6. A device for soldering solar cells according to claim 1, 2 or 3, wherein the strip of soldering material is a solder strip or a solder wire.
7. A solar cell soldering apparatus according to claim 1,2 or 3, wherein the cross-sectional shape of the strip of soldering material is circular, triangular or rectangular.
8. A solar cell soldering apparatus according to claim 1,2 or 3, wherein the cross-sectional shape of the guide groove matches the cross-sectional shape of the corresponding strip-shaped soldering material.
9. A solar cell soldering apparatus according to claim 1, 2 or 3, wherein the depth of the guide groove is not greater than the thickness of the corresponding strip-shaped soldering material.
10. The welding device for solar cells according to claim 2, wherein the pressing member provided with a plurality of guide grooves is an elastic pressing plate or a pressing wheel;
The elastic pressing piece comprises a pressing end facing the battery piece, and a plurality of guide grooves are formed in the pressing end of the elastic pressing piece;
The lateral peripheral surface of the pinch roller faces the battery piece, a plurality of guide grooves are formed in the lateral peripheral surface of the pinch roller, and the guide grooves are annular grooves coaxial with the pinch roller.
11. The solar cell welding device according to claim 10, wherein the pressing end of the elastic pressing piece is divided into a plurality of pressing strips facing the cell, and one or more guide grooves are respectively arranged at the end part of each pressing strip facing the cell.
12. The solar cell welding apparatus according to claim 10, wherein the pinch roller is a soft wheel.
13. The welding device for solar cells according to claim 3, wherein the plurality of pressing members are a plurality of pressing bars or a plurality of pressing wheels;
the plurality of press rods are arranged side by side, the plurality of press rods respectively comprise a pressing end facing the battery piece, and the pressing ends of the plurality of press rods are respectively provided with a guide groove;
the plurality of pinch rollers are arranged side by side, the lateral peripheral surfaces of the plurality of pinch rollers face the battery piece, the lateral peripheral surfaces of the plurality of pinch rollers are respectively provided with a guide groove, and the guide grooves are annular grooves coaxial with the pinch rollers.
14. The welding device for solar cells according to claim 13, wherein each of the pressing bars is provided with a swing bar mechanism for pressing a pressing end of the pressing bar toward the cell, and the pressing bar serves as a swing bar in the swing bar mechanism.
15. The welding device for solar cells according to claim 13, wherein each pressing wheel is provided with a swing link mechanism pressing a lateral peripheral surface of the pressing wheel against the cell, and the pressing wheel is hinged to a swing link in the swing link mechanism.
16. The solar cell welding device according to claim 1, 2 or 3, wherein the heating and welding unit is one or more of hot air heating, infrared heating, electromagnetic induction heating, conduction heating and electric current heating.
17. A method for welding solar cells, characterized in that the welding device according to any one of claims 1 to 16 is used for welding strip-shaped welding materials on the surfaces of the cells, the pressing piece and the cells are relatively translated during welding, and in the process of the relative translation:
The guide groove on the pressing piece is pressed on the corresponding strip-shaped welding material on the surface of the battery piece, and the guide groove is opposite to the arrangement direction of the strip-shaped welding material;
And the heating and welding unit directly heats and/or indirectly heats the strip-shaped welding materials at the position of each guide groove, so that the strip-shaped welding materials are heated and the welding with the battery piece is completed.
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| CN202211091437.1A CN115411145B (en) | 2022-09-07 | 2022-09-07 | Welding device and method for solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111180549A (en) * | 2019-12-26 | 2020-05-19 | 泰州隆基乐叶光伏科技有限公司 | Production device and production method of conductive interconnection plate, and conductive interconnection plate |
| CN111168184A (en) * | 2020-01-13 | 2020-05-19 | 张俊 | A solar cell welding machine and welding method |
| CN215644425U (en) * | 2021-06-28 | 2022-01-25 | 嘉兴隆基乐叶光伏科技有限公司 | Handling device and series welding machine |
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| US20160380120A1 (en) * | 2015-06-26 | 2016-12-29 | Akira Terao | Metallization and stringing for back-contact solar cells |
| US20220320811A1 (en) * | 2019-09-26 | 2022-10-06 | O.M.C. Co., Ltd. | Laser soldering method and device |
| CN114649439B (en) * | 2020-12-18 | 2025-04-15 | 营口金辰机械股份有限公司 | A high-speed string welding machine welding conveying line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111180549A (en) * | 2019-12-26 | 2020-05-19 | 泰州隆基乐叶光伏科技有限公司 | Production device and production method of conductive interconnection plate, and conductive interconnection plate |
| CN111168184A (en) * | 2020-01-13 | 2020-05-19 | 张俊 | A solar cell welding machine and welding method |
| CN215644425U (en) * | 2021-06-28 | 2022-01-25 | 嘉兴隆基乐叶光伏科技有限公司 | Handling device and series welding machine |
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