Solar cell welding device and string welding machine

Abstract

The present invention discloses a solar cell welding device and a string welding machine. The solar cell welding device includes a bracket, a first driving mechanism, a second driving mechanism, a positioning mechanism, and a heating mechanism; the first driving mechanism and the second driving mechanism are arranged on the bracket; the positioning mechanism is connected to the output end of the first driving mechanism, and the first driving mechanism can drive the positioning mechanism to move up and down; the heating mechanism includes a positive electrode and a negative electrode respectively connected to the output end of the second driving mechanism, the positive electrode and the negative electrode are respectively connected to a power source, the second driving mechanism can drive the positive electrode and the negative electrode to move up and down, and the positive electrode and the negative electrode are respectively located on opposite sides of the positioning mechanism; when the positioning mechanism presses against the battery cell, the second driving mechanism can drive the positive electrode and the negative electrode to respectively press against the battery cell. The present invention can improve the welding efficiency, and the welding tape can be uniformly heated, and the battery cell will not be deformed due to excessive local temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell welding, and particularly relates to a solar cell welding device and a string welding machine. Background Art

[0002] The welding process of welding a welding tape on the grid line of a solar cell is an important process in the production process of photovoltaic modules. The main function of the welding tape is to collect the current on the solar cell and transmit the current.

[0003] The existing technology mainly uses heating lamps or infrared heating to heat the surface of the welding tape. During welding, the welding tape is arranged on the grid line of the solar cell, and the heating device moves above the solar cell and the welding tape to heat the welding tape, so as to complete the welding of the welding tape and the solar cell. When heating the welding tape by the existing method, the designed energy consumption of the heating device is too high, the temperature is uneven, and the solar cell receives too much heat, which easily causes the deformation of the solar cell. Summary of the Invention

[0004] The purpose of the present invention is to provide a solar cell welding device, which can make the welding temperature more uniform, improve the qualified rate of solar cell welding, and improve the welding efficiency.

[0005] Another purpose of the present invention is to provide a solar cell string welding machine, which can improve the qualified rate of solar cell welding and improve the welding efficiency.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A solar cell welding device includes a bracket, a first driving mechanism, a second driving mechanism, a positioning mechanism, and a heating mechanism; the first driving mechanism is arranged on the bracket; the second driving mechanism is arranged on the bracket, and the second driving mechanism is located above the first driving mechanism; the positioning mechanism is connected to the output end of the first driving mechanism, the first driving mechanism can drive the positioning mechanism to lift and lower, and the positioning mechanism can press against the upper surface of the solar cell located below the positioning mechanism to position the solar cell; the heating mechanism includes a positive electrode and a negative electrode respectively connected to the output end of the second driving mechanism, the positive electrode and the negative electrode are respectively connected to a power supply, the second driving mechanism can drive the positive electrode and the negative electrode to lift and lower, and the positive electrode and the negative electrode are respectively located on opposite sides of the positioning mechanism;

[0008] When the positioning mechanism presses against the solar cell, the second driving mechanism can drive the positive electrode and the negative electrode to respectively press against the solar cell, so that the positive electrode and the negative electrode form a current loop with the welding tape on the solar cell to electrically heat the welding tape.

[0009] Optionally, the heating mechanism further includes a connecting plate, the connecting plate is connected to the output end of the second driving mechanism, and the positive electrode and the negative electrode are respectively connected to the connecting plate.

[0010] Optionally, the heating mechanism further includes a first buffer assembly, and the positive electrode and the negative electrode are respectively connected to the connecting plate through at least one first buffer assembly.

[0011] Optionally, the first buffer assembly includes a guide sleeve, a first guide post and a first elastic member. The guide sleeve is arranged on the connecting plate; the first guide post penetrates and is slidably connected to the guide sleeve, and the first guide post penetrates the connecting plate and is connected to the positive electrode or the negative electrode; the first elastic member is sleeved on the first guide post and its two ends respectively abut against the bottom surface of the connecting plate and the positive electrode or the negative electrode.

[0012] Optionally, the positioning mechanism includes a positioning plate and welding pressure point sheets. The positioning plate is connected to the output end of the first driving mechanism; the welding pressure point sheets are arranged on the positioning plate, and a plurality of the welding pressure point sheets are arranged at intervals along the relative direction of the positive electrode and the negative electrode. A plurality of bumps are arranged at intervals along the direction perpendicular to the interval distribution of the welding pressure point sheets at the bottom of each welding pressure point sheet, and the bumps protrude from the bottom surface of the positioning plate.

[0013] Optionally, the positioning mechanism further includes a support plate and a second buffer assembly. An avoidance groove is formed in the middle of the positioning plate, the middle of the welding pressure point sheet is recessed in the avoidance groove, and one support plate is arranged on the top surface of the positioning plate on both sides of the avoidance groove; the second buffer assembly is arranged on the support plate, and both ends of each welding pressure point sheet are respectively connected to one second buffer assembly.

[0014] Optionally, the second buffer assembly includes a second guide post, a sliding sleeve and a second elastic member. The two ends of the second guide post are connected to the support plate; the sliding sleeve is slidably sleeved on the second guide post, and the welding pressure point sheet is connected to the sliding sleeve; a second elastic member is sleeved on the second guide post on both sides of the sliding sleeve, and the two ends of the second elastic member respectively abut against the sliding sleeve and the support plate.

[0015] Optionally, a cooling mechanism is further included, and the cooling mechanism is used to cool the battery sheet after welding.

[0016] Optionally, the cooling mechanism includes a connecting rod and a blowing hood. One end of the connecting rod is connected to the bracket; the blowing hood is connected to the other end of the connecting rod, and the air outlet of the blowing hood faces the lower part of the positioning mechanism, and the blowing hood is connected with a gas source.

[0017] A solar cell string welding machine includes a solar cell conveying device and a welding tape conveying device. The welding tape conveying device can convey the welding tape onto the solar cells located on the solar cell conveying device. It also includes the above-mentioned solar cell welding device, and the positioning mechanism is arranged above the solar cell conveying device.

[0018] The beneficial effects of the present invention are as follows:

[0019] The present invention includes a bracket, a first driving mechanism, a second driving mechanism, a positioning mechanism, and a heating mechanism. The first driving mechanism and the second driving mechanism are both arranged on the bracket. The second driving mechanism is located above the first driving mechanism. The heating mechanism includes a positive electrode and a negative electrode respectively connected to the output end of the second driving mechanism. The positive electrode and the negative electrode are respectively connected to a power supply. When the first driving mechanism drives the positioning mechanism to press against the solar cell, the second driving mechanism can drive the positive electrode and the negative electrode to press against the solar cell respectively, so that the positive electrode and the negative electrode form a current loop with the welding tape on the solar cell to heat the welding tape. The welding tape serves as a conductor to make the circuit conduct, and the circuit is short-circuited, so that the temperature of the welding tape can rise rapidly, thereby improving the welding efficiency. Moreover, the welding tape can be uniformly heated, the welding performance is stable, and the solar cell will not be deformed due to excessive local temperature, improving the yield rate of welding between the solar cell and the welding tape. Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the solar cell welding device provided by the specific embodiment of the present invention;

[0021] Figure 2 is a three-dimensional structural schematic diagram of another perspective of the solar cell welding device provided by the specific embodiment of the present invention;

[0022] Figure 3 is a circuit schematic diagram when the solar cell and the welding tape are welded by the solar cell welding device provided by the specific embodiment of the present invention;

[0023] Figure 4 is a three-dimensional structural schematic diagram of the heating device of the solar cell welding device provided by the specific embodiment of the present invention;

[0024] Figure 5 is a three-dimensional structural schematic diagram of the positioning mechanism of the solar cell welding device provided by the specific embodiment of the present invention;

[0025] Figure 6 is a three-dimensional structural schematic diagram of the welding pressure point piece of the solar cell welding device provided by the specific embodiment of the present invention.

[0026] In the figure:

[0027] 100, solar cell; 200, welding tape;

[0028] 1. Bracket; 2. First driving mechanism; 3. Positioning mechanism; 31. Second buffer assembly; 311. Sliding sleeve; 312. Second elastic member; 32. Support plate; 33. Welding pressure point sheet; 331. Convex point; 34. Positioning plate; 341. Clearance groove; 4. Cooling mechanism; 41. Blowing hood; 42. Connecting rod; 5. Heating mechanism; 51. Negative electrode; 52. Connecting plate; 53. Positive electrode; 54. First buffer assembly; 541. Guide sleeve; 542. First guide post; 543. First elastic member; 6. Second driving mechanism. Specific embodiments

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0030] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0032] The following combines the attached Figure 1-6 And further illustrates the technical solution of the present invention through specific embodiments.

[0033] This embodiment discloses a solar cell string welding machine. The solar cell string welding machine includes a cell conveying device, a solder tape conveying device, and a solar cell welding device. The solder tape conveying device can convey the solder tape 200 onto the cell 100 located on the cell conveying device.

[0034] As Figures 1 to 3 shown, the solar cell welding device includes a bracket 1, a first driving mechanism 2, a second driving mechanism 6, a positioning mechanism 3, and a heating mechanism 5. The positioning mechanism 3 is arranged above the cell conveying device.

[0035] The first driving mechanism 2 is arranged on the bracket 1. The second driving mechanism 6 is arranged on the bracket 1, and the second driving mechanism 6 is located above the first driving mechanism 2. The positioning mechanism 3 is connected to the output end of the first driving mechanism 2. The first driving mechanism 2 can drive the positioning mechanism 3 to move up and down, and the positioning mechanism 3 can press against the upper surface of the cell 100 located below the positioning mechanism 3 to position the cell 100. The heating mechanism 5 includes a positive electrode 53 and a negative electrode 51 respectively connected to the output end of the second driving mechanism 6. The positive electrode 53 and the negative electrode 51 are respectively connected to a power source. Specifically, the power source is a DC power source. The second driving mechanism 6 can drive the positive electrode 53 and the negative electrode 51 to move up and down, and the positive electrode 53 and the negative electrode 51 are respectively located on opposite sides of the positioning mechanism 3.

[0036] When the positioning mechanism 3 presses against the cell 100, the second driving mechanism 6 can drive the positive electrode 53 and the negative electrode 51 to respectively press against the cell 100, so that the positive electrode 53 and the negative electrode 51 form a current loop with the solder tape 200 on the cell 100 to electrically heat the solder tape 200.

[0037] In this embodiment, the circuit is conducted through the solder tape 200 as a conductor, and the circuit is short-circuited. The temperature of the solder tape 200 can rise rapidly, thereby improving the welding efficiency. Moreover, the solder tape 200 can be uniformly heated, the welding performance is stable, and the cell 100 will not be deformed due to excessive local temperature, improving the yield rate of the welding between the cell 100 and the solder tape 200.

[0038] Optionally, both the first driving mechanism 2 and the second driving mechanism 6 can be linear modules. However, the driving methods of the first driving mechanism 2 and the second driving mechanism 6 are not used to limit the present invention. For example, the first driving mechanism 2 and the second driving mechanism 6 can also be cylinders.

[0039] To make the structure of the solar cell welding device in this embodiment more compact, the heating mechanism 5 further includes a connecting plate 52. The connecting plate 52 is connected to the output end of the second driving mechanism 6, and the positive electrode 53 and the negative electrode 51 are respectively connected to the connecting plate 52.

[0040] When the positive electrode 53 and the negative electrode 51 are pressed against the solar cell 100, in order to avoid damage to the solar cell 100 caused by the pressure of the positive electrode 53 and the negative electrode 51 on the solar cell 100, as Figure 2 shown, the heating mechanism 5 further includes a first buffer assembly 54, and the positive electrode 53 and the negative electrode 51 are respectively connected to the connecting plate 52 through at least one first buffer assembly 54.

[0041] As Figure 4 shown, the first buffer assembly 54 includes a guide sleeve 541, a first guide post 542 and a first elastic member 543. The guide sleeve 541 is provided on the connecting plate 52. The first guide post 542 passes through and is slidably connected to the guide sleeve 541, and the first guide post 542 passes through the connecting plate 52 and is connected to the positive electrode 53 or the negative electrode 51. The first elastic member 543 is sleeved on the first guide post 542 and its two ends respectively abut against the bottom surface of the connecting plate 52 and the positive electrode 53 or the negative electrode 51. Specifically, the guide sleeve 541 can be provided on the top of the connecting plate 52, and the first guide post 542 passes through the guide sleeve 541 and the connecting plate 52 in sequence. In order to prevent the first guide post 542 from disengaging from the guide sleeve 541, a plug is connected to the top of the first guide post 542, and the diameter of the top of the plug is larger than the inner diameter of the guide sleeve 541. Optionally, the first elastic member 543 is a spring. It can be understood that when the second driving mechanism 6 drives the heating mechanism 5 to descend, under the elastic force of the first elastic member 543, the force that can press down the positive electrode 53 and the negative electrode 51 is softer, avoiding damage to the solar cell 100.

[0042] Optionally, one first buffer assembly 54 can be respectively provided at both ends of the positive electrode 53 or the negative electrode 51, so that the positive electrode 53 and the negative electrode 51 can move smoothly when pressed down.

[0043] As Figure 2 and Figure 5 shown, the positioning mechanism 3 includes a positioning plate 34 and a welding pressure point sheet 33. The positioning plate 34 is connected to the output end of the first driving mechanism 2. The welding pressure point sheet 33 is provided on the positioning plate 34, and a plurality of welding pressure point sheets 33 are arranged at intervals along the relative direction of the positive electrode 53 and the negative electrode 51. A plurality of bumps 331 are arranged at intervals along the direction perpendicular to the interval distribution of the welding pressure point sheets 33 at the bottom of each welding pressure point sheet 33, and the bumps 331 protrude from the bottom surface of the positioning plate 34. During welding, each bump 331 corresponds to a welding point, and through the extrusion of the bump 331 on the welding tape 200 and the solar cell 100, the welding of the welding tape 200 and the solar cell 100 is completed.

[0044] To avoid damaging the solar cell 100 when the welding pressure piece 33 is pressed down, the positioning mechanism 3 further includes a support plate 32 and a second buffer assembly 31. A clearance groove 341 is formed in the middle of the positioning plate 34, and the middle part of the welding pressure piece 33 is recessed in the clearance groove 341. A support plate 32 is provided on the top surface of the positioning plate 34 on both sides of the clearance groove 341. The second buffer assembly 31 is arranged on the support plate 32, and both ends of each welding pressure piece are respectively connected to a second buffer assembly 31. It can be understood that when the first driving mechanism 2 drives the positioning mechanism 3 to descend, the elastic force of the first elastic member 543 can make the force for pressing down the welding pressure piece 33 softer, avoiding damaging the solar cell 100.

[0045] Specifically, the second buffer assembly 31 includes a second guide post, a sliding sleeve 311, and a second elastic member 312. Both ends of the second guide post are connected to the support plate 32. An installation groove is formed in the middle of the support plate 32, and the second guide post is arranged in the installation groove and both ends are connected to the two side walls of the installation groove. The sliding sleeve 311 is slidably sleeved on the second guide post, and the welding pressure piece is connected to the sliding sleeve 311. First connection holes are formed at both ends of the welding pressure piece 33, a connection piece is connected to the outer side wall of the sliding sleeve 311, and a second connection hole is formed in the connection piece. The welding pressure piece 33 and the sliding sleeve 311 are connected by a screw rod passing through the first connection hole and the second connection hole. Nuts are respectively sleeved on the screw rods on both sides of the connection piece and the welding pressure piece 33. The setting of the nuts can make the connection between the connection piece and the welding pressure piece 33 more stable. A second elastic member 312 is sleeved on the second guide post on both sides of the sliding sleeve 311, and both ends of the second elastic member 312 respectively abut against the sliding sleeve 311 and the support plate 32. Optionally, the second elastic member 312 can be a spring.

[0046] To enable the solar cell 100 to be quickly cooled after being welded to the solder joints, as Figure 1 and Figure 2 shown, the solar cell welding device in this embodiment further includes a cooling mechanism 4, and the cooling mechanism 4 is used to cool the welded solar cell 100.

[0047] Specifically, the cooling mechanism 4 includes a connecting rod 42 and a blowing hood 41. One end of the connecting rod 42 is connected to the bracket 1. The blowing hood 41 is connected to the other end of the connecting rod 42, and the air outlet of the blowing hood 41 faces the lower part of the positioning mechanism 3. The blowing hood 41 is connected to a gas source.

[0048] The present invention comprises a support 1, a first driving mechanism 2, a second driving mechanism 6, a positioning mechanism 3 and a heating mechanism 5. The first driving mechanism 2 and the second driving mechanism 6 are both arranged on the support 1, the second driving mechanism 6 is located above the first driving mechanism 2, the heating mechanism 5 comprises a positive electrode 53 and a negative electrode 51 respectively connected to the output end of the second driving mechanism 6, the positive electrode 53 and the negative electrode 51 are respectively connected to the power supply, when the first driving mechanism 2 drives the positioning mechanism 3 to press against the battery cell 100, the second driving mechanism 6 can drive the positive electrode 53 to press against the battery cell 100, and the positive electrode 53 and the negative electrode 51 are respectively connected to the power supply ... The positive electrode 53 and the negative electrode 51 are respectively pressed against the battery cell 100, so that the positive electrode 53 and the negative electrode 51 form a current loop with the welding strip 200 on the battery cell 100 to heat the welding strip 200. The welding strip 200 acts as a conductor to conduct the circuit, and the circuit is short-circuited. The temperature of the welding strip 200 can be increased rapidly, thereby improving the welding efficiency, and the welding strip 200 can be evenly heated, the welding performance is stable, the battery cell 100 will not be deformed due to the local excessive temperature, thereby improving the yield rate of the welding between the battery cell 100 and the welding strip 200.

[0049] When in use, the battery cell conveying device conveys the battery cell 100, and the welding tape conveying device places the welding tape 200 on the battery cell 100. When the battery cell conveying device conveys the battery cell 100 with the welding tape 200 placed thereon to the bottom of the positioning mechanism 3, the first driving mechanism 2 drives the positioning mechanism 3 to press against the battery cell 100, and the second driving mechanism 6 presses the positive electrode 53 and the negative electrode 51 against the battery cell 100 respectively. The positive electrode 53 and the negative electrode 51 form a current loop with the welding tape 200, so that the welding tape 200 can be heated, the tin layer on the surface of the welding tape 200 melts, and the welding pressure point sheet 33 presses against the welding tape 200 to complete the welding of the welding tape 200 and the battery cell 100. After the welding is completed, the second driving mechanism 6 drives the positive electrode 53 and the negative electrode 51 to rise, and the first driving mechanism 2 drives the positioning mechanism 3 to rise, and the above operations are repeated, so that the batch welding of the battery cell 100 and the welding tape 200 can be completed.

[0050] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A solar cell welding device, characterized in that, Comprising: A bracket (1); A first driving mechanism (2), arranged on the bracket (1); A second driving mechanism (6), arranged on the bracket (1), and the second driving mechanism (6) is located above the first driving mechanism (2); A positioning mechanism (3), connected to the output end of the first driving mechanism (2), the first driving mechanism (2) can drive the positioning mechanism (3) to move up and down, and the positioning mechanism (3) can press against the upper surface of the solar cell (100) located below the positioning mechanism (3) to position the solar cell (100); and A heating mechanism (5), the heating mechanism (5) includes a positive electrode (53) and a negative electrode (51) respectively connected to the output end of the second driving mechanism (6), the positive electrode (53) and the negative electrode (51) are respectively connected to a power source, the second driving mechanism (6) can drive the positive electrode (53) and the negative electrode (51) to move up and down, and the positive electrode (53) and the negative electrode (51) are respectively located on opposite sides of the positioning mechanism (3); When the positioning mechanism (3) presses against the solar cell (100), the second driving mechanism (6) can drive the positive electrode (53) and the negative electrode (51) to respectively press against the solar cell (100), so that the positive electrode (53) and the negative electrode (51) form a current loop with the welding tape (200) on the solar cell (100) to electrically heat the welding tape (200); The positioning mechanism (3) includes: A positioning plate (34), the positioning plate (34) is connected to the output end of the first driving mechanism (2); and Welding pressure point pieces (33), the welding pressure point pieces (33) are arranged on the positioning plate (34), and a plurality of the welding pressure point pieces (33) are arranged at intervals along the opposite direction of the positive electrode (53) and the negative electrode (51), and a plurality of bumps (331) are arranged at intervals at the bottom of each welding pressure point piece (33) along the direction perpendicular to the interval distribution of the welding pressure point pieces (33), and the bumps (331) protrude from the bottom surface of the positioning plate (34); The positioning mechanism (3) further includes: A support plate (32), a clearance groove (341) is formed in the middle of the positioning plate (34), the middle of the welding pressure point piece (33) is recessed in the clearance groove (341), and one support plate (32) is arranged on the top surface of the positioning plate (34) on both sides of the clearance groove (341); and A second buffer assembly (31), the second buffer assembly (31) is arranged on the support plate (32), and both ends of each welding pressure point piece (33) are respectively connected to one second buffer assembly (31); It further includes a cooling mechanism (4), and the cooling mechanism (4) is used for cooling the welded solar cell (100).

2. The solar cell welding device according to claim 1, characterized in that, The heating mechanism (5) further includes: A connecting plate (52), the connecting plate (52) is connected to the output end of the second driving mechanism (6), and the positive electrode (53) and the negative electrode (51) are respectively connected to the connecting plate (52).

3. The solar cell welding device according to claim 2, characterized in that, The heating mechanism (5) further includes: A first buffer assembly (54), the positive electrode (53) and the negative electrode (51) are respectively connected to the connecting plate (52) through at least one of the first buffer assemblies (54).

4. The solar cell welding device according to claim 3, characterized in that, The first buffer assembly (54) includes: A guide sleeve (541), the guide sleeve (541) is arranged on the connecting plate (52); A first guide post (542), the first guide post (542) penetrates and is slidably connected to the guide sleeve (541), and the first guide post (542) penetrates the connecting plate (52) and is connected to the positive electrode (53) or the negative electrode (51); and A first elastic member (543), the first elastic member (543) is sleeved on the first guide post (542) and its two ends respectively abut against the bottom surface of the connecting plate (52) and the positive electrode (53) or the negative electrode (51).

5. The solar cell welding device according to claim 1, characterized in that, The second buffer assembly (31) includes: A second guide post, both ends of the second guide post are connected to the support plate (32); A sliding sleeve (311), the sliding sleeve (311) is slidably sleeved on the second guide post, and the welding pressure point piece (33) is connected to the sliding sleeve (311); and A second elastic member (312), one second elastic member (312) is sleeved on each of the second guide posts on both sides of the sliding sleeve (311), and the two ends of the second elastic member (312) respectively abut against the sliding sleeve (311) and the support plate (32).

6. The solar cell welding device according to claim 1, characterized in that, The cooling mechanism (4) includes: A connecting rod (42), one end of the connecting rod (42) is connected to the bracket (1); and A blowing hood (41), the blowing hood (41) is connected to the other end of the connecting rod (42), and the air outlet of the blowing hood (41) faces the lower part of the positioning mechanism (3), and the blowing hood (41) is connected to a gas source.

7. A solar cell string welding machine, comprising a solar cell conveying device and a welding tape conveying device, wherein the welding tape conveying device is capable of conveying a welding tape (200) onto a solar cell (100) located on the solar cell conveying device, and is characterized in that, It further includes the solar cell welding device according to any one of claims 1-6, and the positioning mechanism (3) is arranged above the battery sheet conveying device.

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