A stringing apparatus

Abstract

The utility model relates to photovoltaic module manufacturing technical field, specifically disclose a stringing equipment. The stringing equipment includes compound platform and stringing conveying line, and the compound platform includes workstation and rotary table, and rotary table circulates rotation along the first station, second station, third station and fourth station of workstation, the top surface of rotary table is intervally provided with four placement sites along the ring, each placement site all is provided with two rows of receiving platform group, each row of receiving platform group is provided with two columns or three columns of receiving platform, and one receiving platform adsorbs and fixes one cell piece, the both ends of each receiving platform are away from and close to rotary table center and are provided with the welding strip positioning assembly, each station place is provided with cell piece feeding device, welding strip feeding device, first laminating device and carrying device respectively, and the second laminating device is provided above stringing conveying line. The stringing equipment passes through once compound four two -piece cell pieces or six two -piece cell pieces, realizes the preparation of two or three cell strings simultaneously, and the stringing efficiency is improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module manufacturing technology, and in particular to a stringing device. Background Technology

[0002] Current solar cell stringing equipment includes a rotary composite platform and a stringing conveyor line. The rotary composite platform consists of a worktable and a turntable rotatably mounted on the worktable. During operation, solar cells are placed one by one on the turntable, causing each individual cell to rotate with the turntable. During rotation, the individual cells are fitted with solder strips and coated with film. At a specific station, the coated cells are transported to the subsequent processing mechanism for stringing. However, for two-piece and three-piece solar cells, the existing rotary composite platform can only process one two-piece or three-piece solar cell at a time. When stringing, one coated cell is placed at a time, and the stringing efficiency needs to be further improved. Summary of the Invention

[0003] The purpose of this invention is to propose a stringing device that can simultaneously produce two or three battery strings by combining four or six two-piece battery cells in one step, thereby greatly improving the stringing efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution: A stringing device includes a composite platform and a stringing conveyor line. The composite platform includes a workbench and a turntable. The workbench is provided with a first station, a second station, a third station and a fourth station. The turntable rotates cyclically along the first station, the second station, the third station and the fourth station. The top surface of the turntable is provided with four placement positions along the circumferential direction. Each placement position is provided with two rows of receiving platforms along the radial direction of the turntable. Each row of receiving platforms is provided with two or three columns of receiving platforms, and one receiving platform is used to adsorb and fix one battery cell. Each receiving platform is provided with a welding strip positioning component at both ends away from and near the center of the turntable. The first workstation is equipped with a battery cell feeding device, which can supply battery cells to all the receiving tables at the same placement position; The second workstation is equipped with a welding strip feeding device, which can supply welding strip groups to all the receiving platforms at the same placement position and lay each welding strip group on the corresponding battery cell. The third workstation is equipped with a first film coating device, which can supply first adhesive film groups to all the receiving tables at the same placement position and make each first adhesive film group be applied to the corresponding battery cell. The fourth workstation is equipped with a conveying device. The conveying device can flip all the battery cells after the first adhesive film group is laid on the same placement position to the string conveyor line, and lay the extension of the solder ribbon group on the next battery cell in the same row on the previous battery cell to form at least two battery strings. A second coating device is provided above the string conveyor line, which can apply a second adhesive film to the battery cells on each string of batteries.

[0005] Furthermore, the welding strip positioning assembly includes a gripper base and a plurality of first grippers and a plurality of second grippers arranged alternately side by side. Each first gripper is connected to a first gripper plate, and each second gripper is connected to a second gripper plate. The first gripper plates and the second gripper plates are slidably disposed on the gripper base facing each other or away from each other. The gripper base is slidably connected to the turntable and can slide toward or away from the center of the turntable. A sliding block is slidably disposed below the gripper base, and a second return spring is disposed between the sliding block and the gripper base. The sliding block is hinged to two connecting rods, one of which is hinged to the first gripper plate, and the other of which is hinged to the second gripper plate. At the same placement position, each sliding block located at the end of each row of receiving platforms away from the center of the turntable is connected by a first connecting frame, and each sliding block located at the end of each row of receiving platforms near the center of the turntable is connected by a second connecting frame; the lower ends of the first connecting frame and the lower ends of the second connecting frame extend downwards out of the bottom surface of the turntable.

[0006] Furthermore, a reset mechanism, a first lifting mechanism, and a first drive mechanism for triggering the movement of the first connecting frame are provided below the turntable; The reset mechanism is located at the first station, the second station, or between the first station and the second station, and can drive the first connecting frame to move toward the central axis of the turntable, so that the clamping ends of each of the welding strip positioning components located at the end of each row of receiving platforms away from the center of the turntable move together to the top of the corresponding battery cell. The first lifting mechanism is located at the second work station and can lift the first connecting frame so that the clamping ends of each of the welding strip positioning components located above the battery cell open synchronously; The first drive mechanism is located at the fourth station, or between the third station and the fourth station, and is capable of lifting the first connecting frame and driving the first connecting frame to move along a direction away from the central axis of the turntable, so that each of the welding strip positioning components away from the center of the turntable releases its clamping on the welding strip and exits from above the corresponding battery cell after the clamping is released.

[0007] Furthermore, a first return spring is provided between each of the gripper seats located at one end of each row of receiving platforms near the center of the turntable and the corresponding receiving platform; a second drive mechanism and a second lifting mechanism are provided below the turntable for triggering the movement of the second connecting frame; The second drive mechanism is located at the second work station and is capable of driving the second connecting frame to move in a direction away from the center of the turntable to compress the first return spring, and lifting the second connecting frame to open the corresponding welding strip positioning components; The second lifting mechanism is located at the fourth work station and is capable of lifting the second connecting frame so that the welding strip positioning components located at the end of each row of receiving platforms near the center of the turntable release their clamping on the welding strip.

[0008] Furthermore, the welding strip feeding device includes a welding strip unwinding assembly, a welding strip pulling mechanism, and a welding strip cutting mechanism; the welding strip pulling mechanism includes several independently moving welding strip pullers, one of which pulls the welding strip from the welding strip unwinding assembly, and the other welding strip pullers clamp the pulled-out welding strip in segments; after the welding strip is cut into segments by the welding strip cutting mechanism, each welding strip puller drives the clamped welding strip group to move toward the receiving platform, and adjusts the pitch between each welding strip puller during the movement.

[0009] Furthermore, the first film coating device includes a first film pulling and cutting mechanism and a first film transport mechanism; the first film transport mechanism includes several independently moving first film adsorption platforms; the first film pulling and cutting mechanism can pull out the film and cut the pulled-out film into segments; each first film adsorption platform can adsorb and fix the first film group and drive the adsorbed first film group to move toward the receiving platform, and adjust the distance between each first film adsorption platform during the movement.

[0010] Furthermore, the conveying device includes a flipping device and a stacking device. The flipping device is located at the fourth station and can flip the battery cells after each first adhesive film is applied to the string conveyor line. The stacking device is located above the string conveyor line and can place the extension of the solder strip on the battery cells in the rear row onto the battery cells in the front row of the same row.

[0011] Furthermore, a lifting mechanism is provided below the turntable, which can abut against the bottom surface of the turntable, and the lifting mechanism is located at the third work station.

[0012] Furthermore, a roller pressing device is provided above the string conveyor line, which can roll all the battery strings after the second adhesive film is applied.

[0013] Furthermore, the second film coating device includes a second film pulling and cutting mechanism and a second film transport mechanism; the second film pulling and cutting mechanism can pull out the film and cut the pulled-out film into segments; the second film transport mechanism includes several independently moving second film adsorption platforms, each of which can adsorb and fix the second film group and drive the adsorbed second film group to move toward the string conveyor line to lay the second film group.

[0014] The beneficial effects of this utility model are as follows: The stringing equipment of this utility model can realize the composite of four or six two-piece battery cells in one step using a composite platform. The composited battery cells are flipped together and sent to the stringing conveyor line for stacking and coating, thereby realizing the simultaneous preparation of two or three battery strings, which greatly improves the stringing efficiency. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a stringing device provided by this utility model.

[0016] Figure 2 This is a structural diagram of the receiving platform and the two welding strip positioning components at its two ends.

[0017] Figure 3 This is a structural schematic diagram of one embodiment of the first connecting frame.

[0018] Figure 4 This is a partial structural diagram of the welding strip positioning assembly.

[0019] Figure 5 This is a schematic diagram of the first lifting mechanism.

[0020] Figure 6 This is a schematic diagram of the first drive mechanism.

[0021] Figure 7 This is a schematic diagram of the strip pulling process by the welding strip puller.

[0022] Figure 8 This is a schematic diagram of the first coating device. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 8As shown, a stringing device includes a composite platform 1 and a stringing conveyor line 2. The composite platform 1 includes a workbench and a turntable 11. The workbench is provided with a first station, a second station, a third station, and a fourth station. The turntable 1 rotates cyclically along the first station, the second station, the third station, and the fourth station. The top surface of the turntable 11 is provided with four placement positions arranged circumferentially. Each placement position is provided with two rows of receiving platforms arranged radially along the turntable 11. Each row of receiving platforms is provided with two or three rows of receiving platforms 12, and one receiving platform 12 is used to attach and fix one battery cell. Each receiving platform 12 is provided with a welding strip positioning component 13 at both ends away from and near the center of the turntable 11.

[0025] Specifically, when preparing two-cell solar cells into strings, two rows of receiving platforms 12 are set in each row of receiving platform groups; when preparing three-cell solar cells into strings, three rows of receiving platforms 12 are set in each row of receiving platform groups.

[0026] In this string assembly equipment, a cell feeding device 3 is provided at the first station, which can supply cells to all receiving platforms 12 at the same placement position; a solder ribbon feeding device 4 is provided at the second station, which can supply solder ribbon groups to all receiving platforms 12 at the same placement position and lay each solder ribbon group on the corresponding cell; a first coating device 5 is provided at the third station, which can supply first adhesive film groups to all receiving platforms 12 at the same placement position and lay each first adhesive film group on the corresponding cell. The adhesive film is applied to the corresponding battery cell and the solder ribbon on the surface of the battery cell is fixed. A conveying device 6 is provided at the fourth station. The conveying device 6 can flip all the battery cells that have been applied with the first adhesive film at the same placement position onto the stringing conveyor line 2, and lay the extension of the solder ribbon of the solder ribbon group on the previous battery cell in the same row to form at least two battery strings. A second coating device 7 is provided above the stringing conveyor line 2. The second coating device 7 can apply the second adhesive film to the battery cells on each battery string.

[0027] In some embodiments, such as Figure 2-4As shown, the welding strip positioning assembly 13 includes a gripper base 133 and several first grippers 1311 and several second grippers 1321 arranged side by side and alternately. Each first gripper 1311 is connected to a first gripper plate 131, and each second gripper 1321 is connected to a second gripper plate 132. The first gripper plates 131 and second gripper plates 132 are slidably disposed on the gripper base 133 facing each other or away from each other. The gripper base 133 is slidably connected to the turntable 11 and can slide toward or away from the center of the turntable 11. A sliding block 135 is slidably disposed below the gripper base 133. A second return spring is provided between the sliding block 135 and the gripper seat 133; the sliding block 135 is hinged to two connecting rods, one of which is hinged to the first gripper plate 131 and the other connecting rod is hinged to the second gripper plate 132; wherein, at the same placement position, each sliding block 135 located at the end of each row of receiving platforms 12 away from the center of the turntable 11 is connected by a first connecting frame 137, and each sliding block 135 located at the end of each row of receiving platforms 12 near the center of the turntable 11 is connected by a second connecting frame; the lower ends of the first connecting frame 137 and the second connecting frame extend downwards out of the bottom surface of the turntable 11.

[0028] Furthermore, the structure of the first connecting frame 137 can be referred to Figure 3 As shown; the structure of the second connecting frame can refer to the structure of the first connecting frame 137, and avoidance measures can be taken according to the actual situation to prevent interference between the first connecting frame 137 and the second connecting frame during movement.

[0029] In some embodiments, a reset mechanism is provided below the turntable 11. This reset mechanism is located at the first station, the second station, or between the first and second stations, and can drive the first connecting frame 137 to move towards the central axis of the turntable 11, so that the clamping ends of the welding strip positioning components 13 located at the ends of each receiving platform 12 away from the center of the turntable 11 move together above the corresponding battery cell. In a preferred embodiment, the reset mechanism includes a first side push block and a first side push cylinder that drives the first side push block to move linearly. In use, the first side push cylinder drives the first side push block to move, applying a force to the first connecting frame 137, causing the first connecting frame 137 to move towards the central axis of the turntable 11, so that the clamping ends of the corresponding welding strip positioning components 13 move above the battery cell. It should be noted that if the reset mechanism is located at the first station, the reset operation must be performed after the battery cell is placed.

[0030] In some embodiments, a first lifting mechanism 14 is provided below the turntable 11. This first lifting mechanism 14 is located at the second work station and is capable of lifting the first connecting frame 137 to simultaneously open the clamping ends of each welding strip positioning assembly 13 located above the battery cell. As a preferred embodiment, such as... Figure 5As shown, the first lifting mechanism 14 includes a first lifting block 141 and a first lifting cylinder 142 that drives the first lifting block 141 to move up and down. In use, the first lifting cylinder 142 drives the first lifting block 141 to move upward, thereby applying an upward force to the first connecting frame 137, causing the first connecting frame 137 to move upward, which in turn drives each sliding block 135 to move upward, compressing the second return spring, and simultaneously driving the corresponding two connecting rods to rotate, causing the first gripper plate 131 and the second gripper plate 132 to move in opposite directions, thereby opening the clamping of each welding strip positioning assembly 13. After the welding strip group is placed, the first lifting mechanism 14 resets. Under the elastic force of the second return spring and the clamping spring 134, each sliding block 135, each first gripper plate 131 and each second gripper plate 132 moves back to its original position, and each welding strip positioning assembly 13 is in the state of clamping the welding strip.

[0031] In some embodiments, a first drive mechanism 15 is provided below the turntable. This first drive mechanism 15 is located at the fourth work station, or between the third and fourth work stations, and is capable of lifting the first connecting frame 137 and driving the first connecting frame 137 to move along a direction away from the central axis of the turntable 11. This causes each welding strip positioning assembly 13, located away from the center of the turntable 11, to release its clamping on the welding strip and exit from above the corresponding battery cell after the clamping is released. As a preferred embodiment, such as... Figure 6 As shown, the first drive mechanism 15 includes a second lifting block 151, a second side push block 152, a second lifting cylinder 153, and a second side push cylinder 154; wherein the second side push block 152 and the second lifting cylinder 153 are both connected to the moving end of the second side push cylinder 154, and the second lifting block 151 is connected to the moving end of the second lifting cylinder 153.

[0032] In use, firstly, the second lifting cylinder 153 drives the second lifting block 151 to move upward, thereby applying an upward force to the first connecting frame 137, causing the first connecting frame 137 to move upward, which in turn drives each sliding block 135 to move upward, compressing the second return spring and simultaneously driving the corresponding two connecting rods to rotate, causing the first gripper plate 131 and the second gripper plate 132 to move in opposite directions, thereby opening the clamping of each welding strip positioning assembly 13; after the first connecting frame 137 moves upward into place, the second side push cylinder 154 drives the second side push block 152 and the second lifting cylinder 153 to move together along the direction away from the central axis of the turntable 11, causing the first connecting frame 137 to move away from the central axis of the turntable 11, so that the clamping end of each welding strip positioning assembly 13 exits from above the battery cell.

[0033] In some embodiments, a first return spring is provided between each gripper seat 133 located at one end of each row of receiving platforms 12 near the center of the turntable 11 and the corresponding receiving platform 12, so as to use the elastic force of the first return spring to straighten the welding strip.

[0034] In some embodiments, a second drive mechanism is provided below the turntable, located at a second workstation, and is capable of driving the second connecting frame to move in a direction away from the center of the turntable 11 to compress the first return spring, and lifting the second connecting frame to open the corresponding welding strip positioning assemblies 13. In a preferred embodiment, the second drive mechanism may have the same or similar structure as the first drive mechanism. In use, firstly, the second drive mechanism applies a force to the second connecting frame, causing it to move in a direction away from the center of the turntable 11; after the second connecting frame moves into position, the second drive mechanism applies an upward force to the second connecting frame, causing it to move upward.

[0035] In some embodiments, a second lifting mechanism is provided below the turntable 11. This second lifting mechanism is located at the fourth work station and can lift the second connecting frame to release the welding strip positioning components 13 located at the end of each row of receiving platforms 12 near the center of the turntable 11 from clamping the welding strip. As a preferred embodiment, the second lifting mechanism can adopt the same or similar structure as the first lifting mechanism 14. In use, the second lifting mechanism applies an upward force to the second connecting frame, causing the second connecting frame to move upward, thereby driving each sliding block 135 to move upward, compressing the second return spring, and simultaneously driving the corresponding two connecting rods to rotate, causing the first gripper plate 131 and the second gripper plate 132 to move in opposite directions, thereby opening the clamping of each welding strip positioning component 13. After the coated battery cell is removed, the second lifting mechanism resets. Under the elastic force of the second return spring and the clamping spring 134, each sliding block 135, each first gripper plate 131 and each second gripper plate 132 moves back to its original position, and each welding strip positioning component 13 returns to its clamping state.

[0036] In some embodiments, the battery cell loading device 3 uses a vacuum adsorption plate to adsorb and fix multiple battery cells, and uses a lifting and moving module and a linear moving module to drive the vacuum adsorption plate to lift and move linearly, thereby transporting multiple battery cells to the receiving platforms 12 at the same placement position at one time. The lifting and moving module and the linear moving module can be conventional driving devices such as electric linear modules and cylinders.

[0037] In some embodiments, the welding strip feeding device 4 includes a welding strip unwinding assembly, a welding strip pulling mechanism, and a welding strip cutting mechanism; wherein, the welding strip pulling mechanism includes several independently moving welding strip pulling hands 41, one of which pulls the welding strip from the welding strip unwinding assembly, and the remaining welding strip pulling hands 41 clamp the pulled-out welding strip in segments; after the welding strip cutting mechanism cuts the welding strip in segments, each welding strip pulling hand 41 drives the clamped welding strip group to move towards the receiving platform 12, and adjusts the pitch between each welding strip pulling hand 41 during the movement, such as... Figure 7As shown. After the welding strip is cut into segments, each welding strip puller 41 moves laterally and longitudinally along its respective slide rail; the spacing is adjusted during the movement to correspond to the grid line position of the battery cell carried by each receiving platform 12 in the same placement position.

[0038] The number of welding strip rolls in the welding strip unwinding assembly can be set according to the number of columns of the receiving platform 12. The welding strip cutting mechanism can adopt existing cutting methods, which will not be described in detail here.

[0039] In some embodiments, such as Figure 8 As shown, the first coating device 5 includes a film unwinding assembly 51, a first film pulling and cutting mechanism 52, and a first film transport mechanism; wherein, the first film transport mechanism includes several independently moving first film adsorption platforms 53; the first film pulling and cutting mechanism 52 can pull out the film released by the film unwinding assembly 51 and cut the pulled-out film into segments; each first film adsorption platform 53 drives the adsorbed first film group to move toward the receiving table 12, and adjusts the distance between each first film adsorption platform 53 during the movement.

[0040] The number of film rolls in the film unwinding assembly 51 can be set according to the number of columns of the receiving platform 12. The first film pulling and cutting mechanism 52 includes a film pulling handle 521 that can adsorb and fix the film and pull it out by rotational motion, and a film cutting assembly 522, which can adopt existing technology. In this embodiment, the first film group formed after cutting includes a plurality of first films, and one first film corresponds to one welding strip in the welding strip group.

[0041] After the adhesive film is cut into segments, each first adhesive film adsorption platform 53 moves laterally and longitudinally along its respective slide rail; by adjusting the spacing of each first adhesive film adsorption platform 53 during the movement, it corresponds to the battery cells carried by each receiving platform 12 in the same placement position.

[0042] In some embodiments, a lifting mechanism capable of abutting against the bottom surface of the turntable 11 is provided below the turntable 11, and the lifting mechanism is located at the third work station. In a preferred embodiment, the lifting mechanism includes a lifting seat, a lifting block inclinedly slidably disposed on the lifting seat, and a lifting cylinder connected to the lifting block. In use, the lifting cylinder drives the lifting block to slide upwards at an angle, causing the lifting block to abut against the bottom surface of the turntable 11, thereby preventing the turntable 11 from rotating during the coating process and affecting the coating effect.

[0043] In some embodiments, the conveying device 6 includes a flipping device 61 and a stacking device 62. The flipping device 61 is located at the fourth station and is capable of flipping the battery cells after each first adhesive film is applied onto the string conveyor line 2. The stacking device 62 is located above the string conveyor line 2 and is capable of placing the solder strip extensions on the rear row of battery cells onto the front row of battery cells in the same row. It should be noted that the string conveyor line 2 can be configured as a single conveyor line, or as two or three conveyor lines arranged side by side.

[0044] In some embodiments, the second coating device 7 includes a second film pulling and cutting mechanism and a second adhesive film transport mechanism. The second film pulling and cutting mechanism can pull out the adhesive film and cut it into segments. The second adhesive film transport mechanism includes several independently moving second adhesive film adsorption platforms. Each second adhesive film adsorption platform can adsorb and fix the second adhesive film group and drive the adsorbed second adhesive film group toward the string conveyor line 2 to lay each second adhesive film group on the corresponding battery cell. The difference between the second coating device 7 and the first coating device 5 is that the second adhesive film adsorption platform 53 in the second coating device 7 does not need to be spaced. In this embodiment, the second adhesive film group formed after cutting includes several second adhesive films, and one second adhesive film corresponds to one solder strip in the solder strip group.

[0045] In some embodiments, a roller pressing device 8 is provided above the string conveyor line 2. The roller pressing device 8 is used to press each second adhesive film group so that the second adhesive film group is pasted on the corresponding battery cell.

[0046] The working process of the high-efficiency stringing device for solar cells according to the present invention is as follows: When each receiving platform 12 in the same placement position rotates to the first working position with the turntable 11, the battery cell feeding device 3 supplies the required battery cells to each receiving platform 12 at one time, and each receiving platform 12 adsorbs and fixes one battery cell. After the battery cell is placed, the reset mechanism drives the first connecting frame 137 to move toward the central axis of the turntable 11, so that the clamping ends of each welding strip positioning assembly 13 move together above the corresponding battery cell.

[0047] When each receiving platform 12 in the same placement position rotates to the second work position with the turntable 11, the first lifting mechanism 14 lifts the first connecting frame 137, so that the clamping ends of each welding strip positioning component 13 open synchronously; the second driving mechanism drives the second connecting frame to move away from the center of the turntable 11, and lifts the second connecting frame to open each welding strip positioning component 13; the welding strip feeding device 4 supplies the required welding strip group to each receiving platform 12 at one time, and one welding strip group is laid on one battery cell; the first lifting mechanism 14 and the second driving mechanism reset, thereby clamping and fixing each welding strip in the welding strip group, and tightening the clamped welding strip under the elastic force of the first reset spring.

[0048] When each receiving platform 12 in the same placement position rotates to the third working position with the turntable 11, the lifting mechanism abuts against the bottom surface of the turntable 11; the first film coating device 5 supplies the required first film set to each receiving platform 12 at one time, and one first film set is laid on one battery cell; after the first film set is laid, the lifting mechanism resets.

[0049] When each receiving platform 12 in the same placement position rotates with the turntable 11 to the third and fourth work positions, the first drive mechanism first lifts the first connecting frame 137 to loosen each welding strip positioning component 13 that is away from the center of the turntable 11, and then drives the first connecting frame 137 to move along the axis away from the center of the turntable 11 so that each loosened welding strip positioning component 13 exits from above the corresponding battery cell.

[0050] When each receiving platform 12 in the same placement position rotates to the fourth position with the turntable 11, the second lifting mechanism lifts the second connecting frame so that each welding strip positioning component 13 releases its clamping on the welding strip; the second driving mechanism drives the second connecting frame to move away from the center of the turntable 11 and lifts the second connecting frame so that the corresponding welding strip positioning components 13 release their clamping on the welding strip; the conveying device 6 flips all the battery cells after the first adhesive film group is laid together onto the string conveyor line 2, and lays the welding strip extension of the welding strip group on the next battery cell in the same row onto the previous battery cell to form at least two battery strings; the second lifting mechanism and the second driving mechanism are reset.

[0051] The second coating device 7 applies a second adhesive film to each battery string; the rolling device 8 rolls each applied second adhesive film to complete the preparation of the battery string.

[0052] The present invention provides a stringing device that can perform one-time composite of four or six two-piece battery cells using a composite platform 1. The composited battery cells are then flipped onto a stringing conveyor line 2 for stacking and coating, thereby enabling the simultaneous preparation of two or three battery strings and greatly improving stringing efficiency.

[0053] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A stringing device, characterized in that, It includes a composite platform (1) and a series conveyor line (2). The composite platform (1) includes a workbench and a turntable (11). The workbench is provided with a first station, a second station, a third station and a fourth station. The turntable (11) rotates cyclically along the first station, the second station, the third station and the fourth station. The top surface of the turntable (11) is provided with four placement positions along the circumferential direction. Each placement position is provided with two rows of receiving platforms along the radial direction of the turntable (11). Each row of receiving platforms is provided with two or three columns of receiving platforms (12), and one receiving platform (12) is used to attach and fix one battery cell. Each receiving platform (12) is provided with a welding strip positioning component (13) at both ends away from and near the center of the turntable (11). A battery cell feeding device (3) is provided at the first work station. The battery cell feeding device (3) can supply battery cells to all the receiving tables (12) at the same placement position. The second work station is equipped with a welding strip feeding device (4), which can supply welding strip groups to all the receiving platforms (12) at the same placement position and make each welding strip group lay on the corresponding battery cell; The third work station is provided with a first film coating device (5), which can supply first adhesive film groups to all the receiving tables (12) in the same placement position and make each first adhesive film group be applied to the corresponding battery cell. The fourth work station is equipped with a conveying device (6). The conveying device (6) can flip all the battery cells after the first adhesive film group is laid in the same placement position to the string conveyor line (2), and lay the extension of the welding ribbon group on the next battery cell in the same column on the previous battery cell to form at least two battery strings. A second film coating device (7) is provided above the string conveyor line (2). The second film coating device (7) can apply a second adhesive film to the battery cells on each string of batteries.

2. The stringing device according to claim 1, characterized in that, The welding strip positioning assembly (13) includes a gripper seat (133) and a plurality of first grippers (1311) and a plurality of second grippers (1321) arranged alternately side by side. Each first gripper (1311) is connected to a first gripper plate (131), and each second gripper (1321) is connected to a second gripper plate (132). The first gripper plates (131) and the second gripper plates (132) are slidably disposed on the gripper seat (133) facing each other or back to back. 133) is slidably connected to the turntable (11) and can slide toward or away from the center of the turntable (11); a sliding block (135) is slidably arranged below the gripper seat (133), and a second return spring is arranged between the sliding block (135) and the gripper seat (133); the sliding block (135) is hinged to two connecting rods, one of which is hinged to the first gripper plate (131), and the other connecting rod is hinged to the second gripper plate (132); At the same placement position, each of the sliding blocks (135) located at the end of each row of receiving platforms (12) away from the center of the turntable (11) is connected by a first connecting frame (137), and each of the sliding blocks (135) located at the end of each row of receiving platforms (12) close to the center of the turntable (11) is connected by a second connecting frame; the lower ends of the first connecting frame (137) and the lower ends of the second connecting frame extend downwards out of the bottom surface of the turntable (11).

3. The stringing device according to claim 2, characterized in that, Below the turntable (11) are a reset mechanism, a first lifting mechanism (14), and a first drive mechanism (15) for triggering the movement of the first connecting frame (137). The reset mechanism is located at the first station, the second station, or between the first station and the second station, and can drive the first connecting frame (137) to move toward the central axis of the turntable (11), so that the clamping ends of each of the welding strip positioning components (13) located at the end of each row of receiving platforms (12) away from the center of the turntable (11) move together to the top of the corresponding battery cell. The first lifting mechanism (14) is located at the second work station and can lift the first connecting frame (137) so that the clamping ends of each of the welding strip positioning components (13) located above the battery cell open synchronously; The first drive mechanism (15) is located at the fourth station or between the third station and the fourth station, and is capable of lifting the first connecting frame (137) and driving the first connecting frame (137) to move along the direction away from the central axis of the turntable (11), so that each of the welding strip positioning components (13) away from the center of the turntable (11) releases its clamping on the welding strip and exits from above the corresponding battery cell after the clamping is released.

4. A stringing device according to claim 2, characterized in that, A first return spring is provided between each of the gripper seats (133) located at one end of each row of receiving platforms (12) near the center of the turntable (11) and the corresponding receiving platform (12); a second drive mechanism and a second lifting mechanism are provided below the turntable (11) for triggering the movement of the second connecting frame; The second drive mechanism is located at the second work station and is capable of driving the second connecting frame to move in a direction away from the center of the turntable (11) to compress the first reset spring, and lifting the second connecting frame to open the respective welding strip positioning assemblies (13); The second lifting mechanism is located at the fourth work station and is capable of lifting the second connecting frame so that each of the welding strip positioning components (13) located at one end of each row of receiving platforms (12) near the center of the turntable (11) releases its grip on the welding strip.

5. A stringing device according to claim 1, characterized in that, The welding strip feeding device (4) includes a welding strip unwinding assembly, a strip pulling mechanism, and a welding strip cutting mechanism; the strip pulling mechanism includes several independently moving strip pulling hands, one of which pulls the welding strip out of the welding strip unwinding assembly, and the other strip pulling hands clamp the pulled-out welding strip in segments; after the welding strip is cut into segments by the welding strip cutting mechanism, each strip pulling hand drives the clamped welding strip group to move toward the receiving platform, and adjusts the pitch between each strip pulling hand during the movement.

6. A stringing device according to claim 1, characterized in that, The first film coating device (5) includes a first film pulling and cutting mechanism and a first film transport mechanism; the first film transport mechanism includes several independently moving first film adsorption platforms; the first film pulling and cutting mechanism can pull out the film and cut the pulled-out film into segments; each first film adsorption platform can adsorb and fix the first film group and drive the adsorbed first film group to move toward the receiving platform, and adjust the distance between each first film adsorption platform during the movement.

7. A stringing device according to claim 1, characterized in that, The transport device (6) includes a flipping device (61) and a stacking device (62). The flipping device (61) is located at the fourth station and can flip the battery cells after each first adhesive film group is applied to the string conveyor line (2). The stacking device (62) is located above the string conveyor line (2) and can make the extension of the solder strip on the battery cells in the rear row lay on the battery cells in the front row of the same row.

8. A stringing device according to claim 1, characterized in that, A lifting mechanism is provided below the turntable (11) that can abut against the bottom surface of the turntable (11), and the lifting mechanism is located at the third work station.

9. A stringing device according to claim 1, characterized in that, A roller pressing device (8) is provided above the string conveyor line (2), which can press all the battery strings after the second adhesive film is applied.

10. A stringing device according to claim 1, characterized in that, The second film coating device (7) includes a second film pulling and cutting mechanism and a second film transport mechanism; the second film pulling and cutting mechanism can pull out the film and cut the pulled-out film into segments; the second film transport mechanism includes several independently moving second film adsorption platforms, each of which can adsorb and fix the second film group and drive the adsorbed second film group to move toward the string conveyor line (2) to lay the second film group.

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