CN210099286U - Heterogeneous crystalline silicon solar cell welding system - Google Patents

Abstract

The purpose of the utility model is to provide a heterogeneous crystalline silicon solar cell welding system, which includes a frame, a welding strip feeding device, a cell feeding box, a conveyor belt, a cell grabbing device, a heating box, a welding strip feeding device, The battery chip feeding box, the conveyor belt, the battery chip grabbing device and the heating box are all arranged on the frame. The battery chip feeding device is used to grab the battery chips in the battery chip feeding box to the conveyor belt, and the heating box is arranged on the conveyor belt; The welding belt feeding device includes a plurality of guide wheels, a plurality of tensioning components, a cutting component and a welding belt grabbing component. A plurality of tensioning sub-pieces are arranged therebetween, and a cutting sub-piece is arranged between the plurality of tensioning sub-pieces and the conveyor belt. The utility model has the advantages of improving the welding efficiency of solar cells.

Description

A heterogeneous crystalline silicon solar cell welding system

technical field

The utility model relates to the technical field of solar cells, in particular to a welding system for heterogeneous crystalline silicon solar cells.

Background technique

High efficiency and low cost are the decisive factors for the survival and development of photovoltaic technology. At present, among the high-efficiency crystalline silicon cell technology that has been mass-produced, for the heterojunction solar technology with thin amorphous silicon layer, that is, SHJ (also called HIT). , HJT, etc.), due to its advantages of low temperature preparation, simple process steps and good temperature coefficient, it is expected to become one of the mainstream technologies in the photovoltaic industry. The preparation temperature of each film layer of SHJ solar cells is below 250°C. In order to maintain the electrical properties of the cell and not damage the film layer, the subsequent module preparation temperature cannot exceed 230°C within a certain period of time. In addition, the silicon heterojunction solar cell has a double-sided symmetrical structure, the thickness of the silicon wafer is reduced, and the cell sheet is not bent and deformed, which is very suitable for the preparation of ultra-thin cells.

In the manufacturing process of solar cell modules, it is necessary to weld a ribbon on the surface of a single cell, and then connect a certain number of cells in series or in parallel to achieve a given output voltage and current. The Chinese patent with the authorization announcement number CN207787906U discloses a string welding machine, which includes: a conveying device; The two groups of first baffles are respectively arranged at one end of the welding area adjacent to the preheating area and one end of the welding area adjacent to the cooling area, and there is a first set distance between the two groups of first baffles. In the above-mentioned string welding machine, two sets of first baffles block the heat at one end of the welding area adjacent to the preheating area and the end of the welding area adjacent to the cooling area, so as to prevent the heat of the welding area from radiating to the preheating area and the cooling area, preventing preheating The unwelded cells and ribbons in the area are welded together in advance at the end near the welding area, and the welded cells and ribbons in the cooling area are prevented from being melted and welded twice at the end near the welding area, ensuring that The welding tension of each position of the battery string after welding can meet the design requirements.

The prior art has the following defects: in the process of using the above-mentioned string welding machine to connect a certain number of battery pieces in series or in parallel, an operator is required to place the battery pieces on the conveying device, then lay the welding tape on the battery pieces, and weld the battery pieces. The cycle is longer and the efficiency is lower.

SUMMARY OF THE INVENTION

The utility model aims to provide a heterogeneous crystalline silicon solar cell welding system, which has the advantage of improving the welding efficiency of the solar cell.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a heterogeneous crystalline silicon solar cell welding system, including a frame, a welding belt feeding device, a cell feeding box, a conveyor belt, a cell grabbing device and a The heating box, the welding belt feeding device, the battery chip feeding box, the conveyor belt, the battery chip grabbing device and the heating box are all arranged on the frame, and the battery grabbing device is used to load the battery chips in the battery chip feeding box. Grab onto the conveyor belt, and the heating box is arranged on the conveyor belt;

The welding belt feeding device includes a plurality of guide pulleys, a plurality of tensioning components, a cutting component and a welding belt grabbing component, and the plurality of the guide pulleys are rotatably arranged on the frame. A plurality of tensioning sub-components are arranged between each of the pulleys and the conveyor belt, and a cutting sub-component is arranged between the plurality of the tensioning sub-components and the conveyor belt.

By adopting the above technical solution, the welding strips on the multiple pulleys pass through the multiple tensioning components respectively, the welding strip grabbing component grabs the multiple welding strips and lays them on the conveyor belt, and then cuts the multiple welding strips after cutting the components. . The cell grabbing device grabs a cell from the cell loading box and places it on the conveyor belt. After the conveyor belt drives the first cell to move for a certain distance, it stops rotating. The welding tape grabs the sub-component to grab a plurality of welding strips and lay them on the conveyor belt, so that the welding strips are laid on the first cell and the other end of the welding strips is laid on the conveyor belt. On the conveyor belt close to the cutting sub-component, the cutting sub-component cuts off a plurality of welding strips, and the cell grabbing device grabs a cell sheet from the cell feeding box and places it on the conveyor belt. The rotation of the conveyor belt drives the two cells to move, so that the connected ends of the two cells are located in the heating box, and the heating box heats and welds the two cells, thereby improving the welding efficiency of the solar cells.

Preferably, the tensioning component includes a first tensioning pulley and a second tensioning pulley, the first tensioning pulley and the second tensioning pulley are both rotatably arranged on the frame, and the second tensioning pulley The tensioner is located just above the second tensioner.

By adopting the above technical solution, one end of the welding tape on the guide pulley passes between the first tensioning wheel and the second tensioning wheel, and the first tensioning wheel and the second tensioning wheel cooperate to press the welding tape, so that the cutting After the sub-part cuts the welding tape, the welding tape on the pulley is still neatly wound on the pulley.

Preferably, the cutting sub-piece includes a pneumatic cylinder, a first cutting blade and a second cutting blade, the pneumatic cylinder is fixedly arranged on the frame, and the piston of the pneumatic cylinder extends in a vertical downward direction, The first cutting blade is fixedly connected with the end of the piston rod of the pneumatic cylinder, the second cutting blade is fixedly mounted on the frame, and the first cutting blade is located just above the second cutting blade, The length directions of the first cutting blade and the second cutting blade are both perpendicular to the conveying direction of the conveying belt.

By adopting the above technical solution, when the welding tape needs to be cut, the piston rod of the pneumatic cylinder extends in a vertical downward direction, which drives the first cutting blade to move downward. When the piston rod of the pneumatic cylinder is fully extended, the first cutting blade and the The second cutting blade abuts, so as to achieve the effect of cutting the welding tape.

Preferably, the welding ribbon grabbing component includes a moving cross arm, a first electric push rod, a first vacuum pump, a plurality of first air intake pipes and a plurality of first suction cups, and the first electric push rod is fixedly arranged on the On the frame, the length direction of the first electric push rod is parallel to the conveying direction of the conveyor belt, the piston rod of the first electric push rod extends in the direction close to the tensioning component, and the moving cross arm is fixedly arranged at the The end of the piston rod of the first electric push rod, the first vacuum pump is fixedly arranged on the moving cross arm, the multiple first intake pipes are connected to the intake end of the first vacuum pump, and the multiple first intake pipes are connected to the intake end of the first vacuum pump. A plurality of first suction cups are respectively connected to one end of the first air inlet pipe away from the first vacuum pump, and the plurality of first suction cups are respectively disposed opposite to the plurality of tensioning components.

By adopting the above technical solution, when the piston rod of the first electric push rod is fully extended in the direction close to the tensioning sub-piece, the plurality of first suction cups are respectively facing the plurality of tensioning sub-pieces, the vacuum pump works, and the plurality of first suction cups Adsorb multiple ribbons respectively. The piston rod of the first electric push rod is retracted in the direction away from the tensioning component, so as to achieve the effect of driving a plurality of welding belts to move to the conveyor belt.

Preferably, the frame is further provided with two sliding rails, the two sliding rails are respectively located on both sides of the moving cross arm, and the length direction of the sliding rails is perpendicular to the length direction of the moving cross arm, so Both ends of the moving cross-arm are provided with rollers, and the rollers at both ends of the moving cross-arm slide in the two sliding rails respectively.

By adopting the above technical solution, the effect of making the moving cross arm move smoothly during the moving process is achieved.

Preferably, a second electric push rod is provided at the bottom of the battery chip feeding box, the piston rod of the second electric push rod extends in a vertical upward direction, and the end of the piston rod of the second electric push rod A supporting plate is fixedly connected, a placing plate is also arranged on the supporting plate, a plurality of springs are arranged between the supporting plate and the placing plate, and the plurality of springs extend in the vertical direction.

By adopting the above technical solution, the operator stacks the battery sheets on the placing plate, and the battery grabbing device grabs the uppermost cell sheet onto the conveyor belt. After the battery grabbing device grabs the uppermost battery sheet on the placement plate, the pressure of the gravity from the battery sheet received by the plurality of springs is reduced, and the plurality of springs push the battery plate to move upward. When the distance between the battery grabbing device and the top cell sheet is too large and the battery grabbing device cannot grab the top cell sheet, the second electric push rod pushes the support plate to move in the vertical upward direction, so that the The battery grabbing device can grab the topmost cell, so as to achieve the effect of grabbing the cell onto the conveyor belt.

Preferably, the cell grabbing device includes a support arm, a slider, a second vacuum pump, a plurality of second air intake pipes and a plurality of second suction cups, and the support arm is fixed on the frame, so One end of the support arm is located directly above the conveyor belt, the other end of the support arm is located just above the cell loading box, the length direction of the support arm is perpendicular to the conveying direction of the conveyor belt, and the A chute is provided on the side wall of the support cross arm, the slider is slidably arranged in the chute, and an adsorption plate is fixed at one end of the slider outside the chute, and the adsorption plate is parallel to the conveyor belt. A second vacuum pump is fixedly arranged on the adsorption plate, a plurality of the second intake pipes are connected with the intake end of the second vacuum pump, and the ends of the plurality of second intake pipes away from the second vacuum pump are respectively connected with a plurality of Second suction cups, a plurality of second suction cups are all penetrated on the suction plate, and the plurality of second suction cups are all arranged facing the conveyor belt, and the support cross arm is provided with a slider for driving the slider along the support cross arm. A drive that reciprocates in the longitudinal direction.

By adopting the above technical solution, the driving member drives the slider to move, and when the suction plate is located directly above the placement plate, the second vacuum pump is turned on, so that the plurality of second suction cups absorb the uppermost battery slices. After the plurality of second suction cups are adsorbed on the battery sheets, the driving part drives the slider to move. When the slider moves to the top of the conveyor belt, the second vacuum pump is turned off, so that the battery plate falls to the conveyor belt under the action of gravity, thus completing the operation. The feeding work of the battery board.

Preferably, the driving member includes a reciprocating screw and a first inner threaded sleeve threaded on the reciprocating screw, the reciprocating screw is rotatably disposed in the chute of the support cross arm, and the support The length direction of the transverse arm is parallel to the length direction of the reciprocating screw, the sliding block is penetrated on the reciprocating screw, and the sliding block is fixedly connected with the outer wall of the first internal thread sleeve. A motor for driving the reciprocating screw to rotate is arranged on the support cross arm.

By adopting the above technical solution, the motor drives the reciprocating screw to rotate, so that the inner threaded sleeve tends to rotate with the reciprocating screw, and the slider is fixedly connected to the outer wall of the first inner threaded sleeve to prevent the inner threaded sleeve from rotating. Therefore, under the rotation of the reciprocating screw, the inner thread sleeve drives the slider to reciprocate along the length direction of the chute supporting the transverse arm, thereby achieving the effect of driving the slider to reciprocate along the length direction of the chute supporting the transverse arm.

Preferably, multiple infrared heating tubes are arranged on multiple side walls of the heating box.

By adopting the above technical solution, a plurality of infrared heating tubes can heat and weld two adjacent battery sheets.

To sum up, the beneficial effects of the present invention are:

1. The utility model has the advantage of improving the welding effect of solar cells;

2. The frame of the present utility model is also provided with two sliding rails. The two sliding rails are respectively located on both sides of the moving cross arm. Both ends of the moving cross arm are provided with rollers. The two sliding rails slide inside, which has the advantage of making the moving cross arm move smoothly during the moving process.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram after the utility model hides the slide rail and the partial sectional view for showing the infrared heating tube;

Fig. 3 is the enlarged schematic diagram of A part in Fig. 2;

FIG. 4 is a schematic structural diagram of the present invention for displaying the battery chip feeding box and the battery chip grabbing device;

FIG. 5 is an enlarged schematic view of part B in FIG. 4 .

In the figure, 1, the frame; 2, the welding belt feeding device; 21, the guide pulley; 22, the tensioning component; 221, the first tensioning wheel; 222, the second tensioning wheel; 23, the cutting component ; 231, pneumatic cylinder; 232, the first cutting blade; 233, the second cutting blade; 24, the welding ribbon grabbing component; 241, the moving arm; 242, the first electric push rod; 243, the first vacuum pump; 244 , the first air intake pipe; 245, the first suction cup; 3, the battery chip feeding box; 31, the second electric push rod; 32, the support plate; 33, the placing plate; 34, the return spring; 4, the conveyor belt; Grabbing device; 51, support arm; 52, slider; 53, second vacuum pump; 54, second intake pipe; 55, second suction cup; 6, heating box; 61, infrared heating tube; 7, slide rail; 8. Driving part; 81. Reciprocating screw; 82. Internal thread sleeve; 9. Motor.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings 1 to 5 of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIG. 1 , a heterogeneous crystalline silicon solar cell welding system includes a frame 1 , a welding tape feeding device 2 , a cell feeding box 3 , a conveyor belt 4 , a cell grabbing device 5 and a heating box 6 . The ribbon feeding device 2 , the battery chip feeding box 3 , the conveyor belt 4 , the battery chip grabbing device 5 and the heating box 6 are all arranged on the rack 1 . Grab onto the conveyor belt 4 , and the heating box 6 is arranged on the conveyor belt 4 . In this embodiment, three infrared heating tubes 61 are arranged on the four side walls of the heating box 6 .

2 and 3, the welding strip feeding device 2 includes three guide rollers 21, three tensioning components 22, cutting components 23 and welding strip grabbing components 24, wherein the three guide rollers 21 are along the The three tensioning sub-pieces 22 are arranged in parallel along the width direction of the conveyor belt 4, and the three pulleys 21 are rotatably arranged on the frame 1, and the pulleys 21 surround the pulleys. The circumference of 21 is wound with welding tape. A tensioning sub-piece 22 is correspondingly arranged between a pulley 21 and the conveyor belt 4. The tensioning sub-piece 22 includes a first tensioning wheel 221 and a second tensioning wheel 222, and the first tensioning wheel 221 and the second tensioning wheel 221. The wheels 222 are all rotatably arranged on the frame 1 , and the second tensioning wheel 222 is located just above the second tensioning wheel 222 . A cutting sub-component 23 is arranged between the three tensioning sub-components 22 and the conveyor belt 4. The cutting sub-component 23 includes a pneumatic cylinder 231, a first cutting blade 232 and a second cutting blade 233, and the pneumatic cylinder 231 is fixedly arranged on the frame. 1, the piston of the pneumatic cylinder 231 extends in a vertically downward direction. The first cutting blade 232 is fixedly connected with the end of the piston rod of the pneumatic cylinder 231, the second cutting blade 233 is fixedly installed on the frame 1, the first cutting blade 232 is located directly above the second cutting blade 233, the first cutting blade 233 is The length directions of the 232 and the second cutting blade 233 are both perpendicular to the conveying direction of the conveying belt 4 .

Before welding, the battery grabbing device first grabs a cell and lays it on the conveyor belt 4, and the conveyor belt 4 drives the first cell to move a distance of the width of a cell. One end of the welding tape on the three pulleys 21 passes between the first tensioning pulley 221 and the second tensioning pulley 222 of the three tensioning sub-pieces 22 respectively. The tensioning pulley 222 cooperates to press the welding tape, so that after the cutting sub-piece 23 cuts the welding tape, the welding tape on the pulley 21 is still neatly wound on the pulley 21 . The ribbon grabbing component 24 grabs three ribbons and lays them on the conveyor belt 4 , so that one end of the three ribbons is located on the first cell, and the other end of the three ribbons is located on the conveyor belt 4 close to the cutting component 23 . The piston rod of the pneumatic cylinder 231 extends in a vertical downward direction, driving the first cutting blade 232 to move downward. When the piston rod of the pneumatic cylinder 231 is fully extended, the first cutting knife and the second cutting knife are in contact, cutting off welding bring.

2 and 3 , the ribbon grabbing component 24 includes a moving cross arm 241, a first electric push rod 242, a first vacuum pump 243, three first air intake pipes 244 and three first suction cups 245. The first electric push rod 242 is fixed on the frame 1 , the length direction of the first electric push rod 242 is parallel to the conveying direction of the conveyor belt 4 , and the piston rod of the first electric push rod 242 extends in a direction close to the tensioning sub-piece 22 . The moving cross arm 241 is fixed on the end of the piston rod of the first electric push rod 242 , and the first vacuum pump 243 is fixed on the moving cross arm 241 . The three first intake pipes 244 are all connected to the intake end of the first vacuum pump 243 , and the ends of the three first intake pipes 244 away from the first vacuum pump 243 are respectively connected with three first suction cups 245 , and the three first suction cups 245 are respectively opposite to the three first suction cups 245 . A tensioning sub-piece 22 is provided. The rack 1 is also provided with two slide rails 7, the two slide rails 7 are respectively located on both sides of the moving cross arm 241, the length direction of the slide rail 7 is perpendicular to the length direction of the moving cross arm 241, and the two slide rails 7 of the moving cross arm 241 are vertical. Both ends are provided with rollers, and the rollers at both ends of the moving transverse arm 241 slide in the two slide rails 7 respectively.

When the piston rod of the first electric push rod 242 is fully extended in the direction close to the tensioning sub-piece 22, the three first suction cups 245 are respectively facing the three tensioning sub-pieces 22, the vacuum pump works, and the three first suction cups 245 are respectively Adsorb three ribbons. After the welding rod is adsorbed, the piston rod of the first electric push rod 242 is retracted in a direction away from the tensioning component 22 , thereby driving a plurality of welding strips to move to the conveyor belt 4 .

4 and 5 , a second electric push rod 31 is disposed at the bottom of the cell loading box 3 , and the piston rod of the second electric push rod 31 extends in a vertical upward direction. A support plate 32 is fixedly connected to the end of the piston rod of the second electric push rod 31 , and a placement plate 33 is also arranged on the support plate 32 . A plurality of springs are arranged between the support plate 32 and the placement plate 33 , and the plurality of springs extend along the vertical direction. Extend straight.

4 and 5, the cell grabbing device 5 includes a support arm 51, a slider 52, a second vacuum pump 53, four second air intake pipes 54 and four second suction cups 55. The support arm 51 is fixedly arranged on the machine On the rack 1 , one end of the supporting transverse arm 51 is located directly above the conveyor belt 4 , and the other end of the supporting transverse arm 51 is located directly above the battery chip loading box 3 . The length direction of the support cross arm 51 is perpendicular to the conveying direction of the conveyor belt 4 , a chute is provided on the side wall of the support cross arm 51 , a slider 52 is slidably arranged in the chute, and one end of the slider 52 outside the chute is fixedly provided with suction plate, the suction plate is parallel to the conveyor belt 4. A second vacuum pump 53 is fixedly arranged on the adsorption plate. The two suction cups 55 and the four second suction cups 55 are all disposed on the suction plate, and the four second suction cups 55 are all disposed facing the conveyor belt 4 . In this embodiment, the four second suction cups 55 are respectively located around the suction plate. A motor 9 is provided on the support cross arm 51 , and the output shaft of the motor 9 is coaxially connected to one end of the reciprocating screw 81 .

After the cutting of the welding ribbon is completed, the motor 9 is turned on, and the reciprocating screw 81 is driven to rotate, so that the female threaded sleeve 82 tends to rotate with the reciprocating screw 81, and the slider 52 is fixedly connected to the outer wall of the first female threaded sleeve 82. , preventing the internal thread sleeve 82 from rotating. Therefore, when the reciprocating screw 81 rotates, the inner thread sleeve 82 drives the slider 52 to reciprocate along the length direction of the chute supporting the transverse arm 51 . When the slider 52 moves to the end of the support cross arm 51 outside the conveyor belt 4, and the suction plate is located directly above the placing plate 33, the second vacuum pump 53 is turned on, so that the four second suction cups 55 absorb the uppermost Cell. After the four second suction cups 55 absorb the battery sheets, the slider 52 moves toward the direction close to the conveyor belt 4 as the reciprocating screw 81 continues to rotate. When the slider 52 moves to the end of the reciprocating screw 81 on the conveyor belt 4, the adsorption plate is located directly above the conveyor belt 4, and the second vacuum pump 53 is turned off, so that the battery plate falls to the conveyor belt 4 under the action of gravity, thereby Complete the battery board loading work.

The implementation principle of the utility model is as follows: before welding, the battery grabbing device first grabs a battery slice and lays it on the conveyor belt 4, and the conveyor belt 4 drives the first battery slice to move a distance of the width of a battery slice. One end of the welding tape on the three pulleys 21 passes between the first tensioning pulley 221 and the second tensioning pulley 222 of the three tensioning sub-pieces 22 respectively. The tensioning pulley 222 cooperates to press the welding tape, so that after the cutting sub-piece 23 cuts the welding tape, the welding tape on the pulley 21 is still neatly wound on the pulley 21 . The piston rod of the first electric push rod 242 is completely extended in the direction close to the tensioning sub-piece 22, the three first suction cups 245 are facing the three tensioning sub-pieces 22 respectively, the vacuum pump works, and the three first suction cups 245 are sucked respectively Three welding strips. After the welding rod is adsorbed, the piston rod of the first electric push rod 242 is retracted in the direction away from the tensioning member 22, thereby driving a plurality of welding strips to move to the conveyor belt 4, so that one end of the three welding strips is located on the first battery. On the sheet, the other ends of the three welding strips are located on the conveyor belt 4 near the cutting sub-piece 23 . The piston rod of the pneumatic cylinder 231 extends in a vertical downward direction, driving the first cutting blade 232 to move downward. When the piston rod of the pneumatic cylinder 231 is fully extended, the first cutting knife and the second cutting knife are in contact, cutting off welding bring. After the cutting of the welding ribbon is completed, the motor 9 is turned on, and the reciprocating screw 81 is driven to rotate, so that the female threaded sleeve 82 tends to rotate with the reciprocating screw 81, and the slider 52 is fixedly connected to the outer wall of the first female threaded sleeve 82. , preventing the internal thread sleeve 82 from rotating. Therefore, when the reciprocating screw 81 rotates, the inner thread sleeve 82 drives the slider 52 to reciprocate along the length direction of the chute supporting the transverse arm 51 . When the slider 52 moves to the end of the support cross arm 51 outside the conveyor belt 4, and the suction plate is located directly above the placing plate 33, the second vacuum pump 53 is turned on, so that the four second suction cups 55 absorb the uppermost Cell. After the four second suction cups 55 absorb the battery sheets, the slider 52 moves toward the direction close to the conveyor belt 4 as the reciprocating screw 81 continues to rotate. When the slider 52 moves to the end of the reciprocating screw 81 on the conveyor belt 4, the adsorption plate is located directly above the conveyor belt 4, and the second vacuum pump 53 is turned off, so that the battery plate falls to the conveyor belt 4 under the action of gravity, thereby Complete the loading of the battery plates, so that the second battery piece is located directly above the conveyor belt 4, and the conveyor belt 4 rotates to drive the two battery plates to move until the ends of the two battery plates connected are located in the heating box 6, and the heating box 6 The infrared heating tubes 61 above the four inner side walls of the two cells are heated and welded.

In the description of the present invention, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "horizontal", "top", "bottom", "front", "rear" and "left" , "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, only In order to facilitate the description of the present invention, it is not indicated or implied that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Claims (9)

1. A heterogeneous crystalline silicon solar cell welding system, characterized in that: comprising a frame (1), a welding strip feeding device (2), a cell feeding box (3), a conveyor belt (4), a cell grabbing A pick-up device (5) and a heating box (6), the ribbon feeding device (2), the cell feeding box (3), the conveyor belt (4), the cell grabbing device (5) and the heating box (6) Both are arranged on the frame (1), the battery grabbing device is used for grabbing the battery pieces in the battery piece feeding box (3) to the conveyor belt (4), and the heating box (6) is arranged on the battery piece feeding box (3). on the conveyor belt (4); The welding strip feeding device (2) comprises a plurality of guide pulleys (21), a plurality of tensioning sub-components (22), a cutting sub-component (23) and a welding-belt grabbing sub-component (24). The pulleys (21) are all rotatably arranged on the frame (1), and a plurality of tensioning sub-pieces (22) are arranged between a plurality of the pulleys (21) and the conveyor belt (4). A cutting sub-component (23) is arranged between each of the tensioning sub-components (22) and the conveyor belt (4). 2 . The welding system for heterogeneous crystalline silicon solar cells according to claim 1 , wherein the tensioning component ( 22 ) comprises a first tension wheel ( 221 ) and a second tension wheel ( 2 . 3 . 222), the first tensioning wheel (221) and the second tensioning wheel (222) are both rotatably arranged on the frame (1), and the second tensioning wheel (222) is located on the second tensioning wheel (222) Just above the tensioner (222). 3 . The welding system for heterogeneous crystalline silicon solar cells according to claim 1 , wherein the cutting component ( 23 ) comprises a pneumatic cylinder ( 231 ), a first cutting blade ( 232 ) and a second cutting blade ( 232 ). 4 . A cutting blade (233), the pneumatic cylinder (231) is fixedly arranged on the frame (1), the piston of the pneumatic cylinder (231) extends in a vertical downward direction, the first cutting blade ( 232) is fixedly connected with the end of the piston rod of the pneumatic cylinder (231), the second cutting blade (233) is fixedly installed on the frame (1), and the first cutting blade (232) is located at Just above the second cutting blade (233), the length directions of the first cutting blade (232) and the second cutting blade (233) are both perpendicular to the conveying direction of the conveyor belt (4). 4 . The welding system for heterogeneous crystalline silicon solar cells according to claim 1 , wherein the welding ribbon grabbing component ( 24 ) comprises a moving cross arm ( 241 ), a first electric push rod ( 4 . 5 . 242), a first vacuum pump (243), a plurality of first air intake pipes (244) and a plurality of first suction cups (245), the first electric push rod (242) is fixedly arranged on the frame (1) , the length direction of the first electric push rod (242) is parallel to the conveying direction of the conveyor belt (4), and the piston rod of the first electric push rod (242) extends along the direction close to the tensioning component (22), The moving cross arm (241) is fixedly arranged on the end of the piston rod of the first electric push rod (242), and the first vacuum pump (243) is fixedly arranged on the moving cross arm (241), and more The first intake pipes (244) are all connected with the intake end of the first vacuum pump (243), and the ends of the plurality of first intake pipes (244) away from the first vacuum pump (243) are respectively connected with a plurality of first vacuum pumps (243). A suction cup (245), and the plurality of first suction cups (245) are respectively disposed opposite to the plurality of tensioning sub-pieces (22). 5. A heterogeneous crystalline silicon solar cell welding system according to claim 4, characterized in that: the frame (1) is further provided with two sliding rails (7), the two sliding rails (7) are respectively located on both sides of the moving cross arm (241), the length direction of the sliding rail (7) is perpendicular to the length direction of the moving cross arm (241), and the two ends of the moving cross arm (241) Both are provided with rollers, and the rollers at both ends of the moving transverse arm (241) slide in the two sliding rails (7) respectively. 6 . The welding system for heterogeneous crystalline silicon solar cells according to claim 1 , wherein a second electric push rod ( 31 ) is arranged at the bottom of the cell loading box ( 3 ). The piston rods of the second electric push rods (31) extend vertically upward, and the ends of the piston rods of the second electric push rods (31) are fixedly connected with a support plate (32), and the support plate (32) A placing plate (33) is also provided on the upper surface, and a plurality of springs are arranged between the supporting plate (32) and the placing plate (33), and the plurality of springs extend in the vertical direction. 7 . The welding system for heterogeneous crystalline silicon solar cells according to claim 6 , wherein the cell grabbing device ( 5 ) comprises a support arm ( 51 ), a slider ( 52 ), a first Two vacuum pumps (53), a plurality of second air intake pipes (54) and a plurality of second suction cups (55), the support arm (51) is fixedly arranged on the frame (1), the support arm (51) One end of (51) is located directly above the conveyor belt (4), the other end of the support cross arm (51) is located directly above the cell loading box (3). The length direction is perpendicular to the conveying direction of the conveyor belt (4), the side wall of the support cross arm (51) is provided with a chute, and the slider (52) is slidably arranged in the chute, and the slider ( 52) An adsorption plate is fixedly arranged at one end outside the chute, the adsorption plate is parallel to the conveyor belt (4), a second vacuum pump (53) is fixedly arranged on the adsorption plate, and a plurality of the second air intake pipes ( 54) are all connected to the air inlet end of the second vacuum pump (53), and one end of the plurality of second air intake pipes (54) away from the second vacuum pump (53) is respectively connected with a plurality of second suction cups (55), and a plurality of second suction cups (55) are respectively connected The second suction cups (55) are all penetrated on the suction plate, a plurality of the second suction cups (55) are all arranged facing the conveyor belt (4), and the support cross arm (51) is provided with a driving slide The block (52) is a driving member (8) for reciprocating motion along the length direction of the support cross arm (51). 8 . The welding system for heterogeneous crystalline silicon solar cells according to claim 7 , wherein the driving member ( 8 ) comprises a reciprocating screw ( 81 ) and is threadedly connected to the reciprocating screw ( 81 ). 9 . ), the reciprocating screw (81) is rotatably arranged in the chute of the support cross arm (51), and the length direction of the support cross arm (51) is the same as that of the support cross arm (51). The length direction of the reciprocating screw (81) is parallel, the sliding block (52) is passed through the reciprocating screw (81), and the sliding block (52) is connected to the first internal thread sleeve (82). ) is fixedly connected to the outer wall of the ), and a motor (9) that drives the reciprocating screw (81) to rotate is provided on the support cross arm (51). 9 . The welding system for heterogeneous crystalline silicon solar cells according to claim 1 , wherein a plurality of infrared heating tubes ( 61 ) are arranged on a plurality of side walls of the heating box ( 6 ). 10 .

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