BC battery sheet dual-drive variable-pitch conveying correction device and variable-pitch conveying correction method

Abstract

The present invention discloses a BC battery cell dual-drive variable-pitch conveying alignment device and a variable-pitch conveying alignment method, comprising a base, a first conveying line and a second conveying line, a first driving mechanism, and an alignment mechanism, wherein the alignment mechanism comprises a push plate A, a push plate a, a push plate B, a push plate b, a first synchronous belt transmission assembly and a second synchronous belt transmission assembly, wherein the first synchronous belt transmission assembly comprises a driving pulley A, a driven pulley A, a motor A and a synchronous belt A, and the second synchronous belt transmission assembly comprises a driving pulley B, a driven pulley B, a motor B and a synchronous belt B, wherein the push plates A and B are respectively located on the outside of the first conveying line and the outside of the second conveying line, and the push plates a and b are respectively located on the inside of the first conveying line and the inside of the second conveying line. Advantages: The left and right alignment distances of the battery cells can be adjusted separately to ensure that the battery cells are accurately docked with the flower basket.

Description

Technical Field

[0001] The present invention relates to the field of BC battery equipment, and in particular to a BC battery sheet dual-drive variable-pitch conveying and correction device and a variable-pitch conveying and correction method. Background Art

[0002] BC cell is a general term for back-contact cells, and its main feature is that both the PN junction and the metal contact are located on the back of the solar cell. During the manufacturing process of BC cells, the cells need to be processed through multiple processes, two of which are designed to transfer the cells from the conveyor runway to the basket. There are generally multiple conveyor runways on the production line, so it is necessary to set up baskets that correspond to the conveyor runways one by one to dock with them. When the traditional basket is docked with the conveyor runway, the basket cannot be adjusted after it is fixed, but there is still a docking error between the basket and the conveyor runway. The existing correction mechanism has equal correction distances on both sides of the cell during correction, so it cannot guarantee that the cell is exactly corrected to the state of precise alignment with the basket, resulting in the cell not being easy to transition into the basket during docking, and it is easy to cause the cell to scratch the basket.

[0003] In view of this, it is necessary to provide a BC battery cell dual-drive variable-length conveying correction device and a variable-length conveying correction method. Summary of the invention

[0004] The present invention provides a BC battery cell dual-drive variable-distance conveying alignment device and a variable-distance conveying alignment method, which effectively solves the problem that the existing conveying alignment device cannot individually adjust the alignment distances on both sides of the battery cell when conveying the battery cell, increases the difficulty of the battery cell entering the flower basket from the conveying runway, and increases the damage rate of the battery cell.

[0005] The technical solution adopted by the present invention is:

[0006] The BC battery sheet dual-drive variable-distance conveying and correcting device comprises a base, a first conveying line and a second conveying line arranged on the base along the Y direction, and a first driving mechanism for driving the first conveying line and the second conveying line to synchronously transmit. The base is also provided with a correcting mechanism, and the correcting mechanism includes a push plate A, a push plate a, a push plate B, a push plate b, a first synchronous belt transmission assembly and a second synchronous belt transmission assembly, and the push plate A, the push plate a, the push plate B and the push plate b are all slidably connected to the base along the Y direction, the first synchronous belt transmission assembly includes a driving pulley A, a driven pulley A, a motor A that drives the driving pulley A to rotate, and a synchronous belt A that is connected to the driving pulley A and the driven pulley A, and the second synchronous belt transmission assembly includes a driving pulley B, a driven pulley B, a motor B that drives the driving pulley B to rotate, and a synchronous belt B that is connected to the driving pulley B and the driven pulley B, and the two sides of the synchronous belt A are respectively fixedly connected to the push plate A and the push plate B, and the two sides of the synchronous belt B are respectively fixedly connected to the push plate a and the push plate b, and the push plate A and the push plate B are respectively located on the outside of the first conveyor line and the outside of the second conveyor line, and the push plate a and the push plate b are respectively located on the inside of the first conveyor line and the inside of the second conveyor line.

[0007] Furthermore, the first conveyor line and the second conveyor line have the same structure, the first conveyor line comprising a conveyor belt, a front end seat body fixedly arranged on a base, a rear end seat body, straight slide rails respectively docked with the front end seat body and the rear end seat body at two ends, a slide seat slidably connected to the straight slide rails, a screw module arranged on the base for driving the slide seat to slide along the straight slide rails, a convex plate arranged on the upper end of the slide seat, a driving wheel arranged on the front end seat body, a No. 1 driven wheel arranged on the rear end seat body, a No. 2 driven wheel arranged on the side of the convex plate away from the front end seat body, a No. 3 driven wheel arranged on the slide seat, and a plurality of tensioning wheels arranged on the front end seat body, the tensioning wheel, the driving wheel, the No. 1 driven wheel, the No. 2 driven wheel and the No. 3 driven wheel are connected through a conveyor belt transmission, the No. 2 driven wheel and the No. 3 driven wheel are both located on one side of the No. 1 driven wheel, and the horizontal distance between the No. 2 driven wheel and the No. 1 driven wheel is smaller than the horizontal distance between the No. 3 driven wheel and the No. 1 driven wheel.

[0008] Furthermore, the first driving mechanism includes a first motor fixedly arranged on a base, a first synchronous belt, a first pulley coaxially fixedly arranged on an output shaft of the first motor, a rotating shaft coaxially fixedly connected to a plurality of driving wheels, and a second pulley coaxially fixedly arranged on the rotating shaft, and the first pulley and the second pulley are connected via a first synchronous belt transmission.

[0009] Furthermore, a height adjustment mechanism is also arranged on the base, and the height adjustment mechanism comprises a plurality of bolts arranged on the base, and the lower ends of the bolts protrude from the lower end surface of the base.

[0010] Furthermore, the push plates A, B, a and b have the same structure, and the push plate A includes a connecting block that is slidably connected to the base and fixedly connected to the synchronous belt A, a vertical plate bolted to the connecting block, a horizontal plate bolted to the upper end of the vertical plate, and a plurality of cylindrical rods arranged along the X direction at the upper end of the horizontal plate.

[0011] Furthermore, the vertical plate is provided with a plurality of No. 1 waist-shaped grooves arranged along the Z direction and extending along the Z direction, and the connecting block is provided with No. 1 screw holes matching with the No. 1 waist-shaped grooves.

[0012] Furthermore, the horizontal plate is provided with a plurality of No. 2 waist-shaped grooves arranged along the X direction and extending along the Y direction, and the upper end of the vertical plate is provided with No. 2 screw holes matched with the No. 2 waist-shaped grooves.

[0013] Furthermore, a No. 1 linear guide rail and a No. 2 linear guide rail are respectively arranged on both sides of the base, the push plate A, push plate B and push plate a are all slidably connected to the No. 1 linear guide rail, and the push plate b is slidably connected to the No. 2 linear guide rail.

[0014] Furthermore, the synchronous belt A is arranged on the side of the base located at the first linear guide rail, and the synchronous belt B is arranged on the upper end surface of the base.

[0015] A dual-drive variable-pitch conveying and alignment method for BC battery cells adopts the dual-drive variable-pitch conveying and alignment device. The first conveyor line and the second conveyor line respectively synchronously convey two battery cells. When passing through the alignment mechanism, the active pulley A is driven to rotate by the motor A. The transmission of the synchronous belt A is realized with the cooperation of the driven pulley A. During the transmission process of the synchronous belt A, the push plates A and B are driven to move toward each other, and the battery cells on the first conveyor line and the battery cells on the second conveyor line are pushed inward from the outside respectively. The active pulley B is driven to rotate by the motor B. The transmission of the synchronous belt B is realized with the cooperation of the driven pulley B. During the transmission process of the synchronous belt B, the push plates a and b are driven to move in opposite directions. By controlling the output power of the motor A and the motor B, the rotation speeds of the synchronous belt A and the synchronous belt B are different, so that the distance that the push plates A and B push the battery cells from the outside is different from the distance that the push plates a and b push the battery cells from the inside.

[0016] Beneficial effects of the invention:

[0017] The structural design of the correction mechanism is that the two push plates used to correct the same battery cell are driven by two synchronous belt transmission components respectively, which can realize the separate adjustment of the left and right correction distances of the battery cell to ensure the precise docking of the battery cell and the flower basket.

[0018] The first conveyor line and the second conveyor line can not only realize the smooth conveyance of the battery cells, but also adjust the position of the slide according to the actual working conditions to realize the change of the conveying distance of the battery cells.

[0019] The design of the push plate can utilize the cylindrical rod to contact the battery cell, and at the same time can ensure that the pushing height and pushing distance of the battery cell can be adjusted by adjusting the vertical plate and the horizontal plate.

[0020] The first driving mechanism drives the first conveyor line and the second conveyor line at the same time, and the alignment mechanism aligns the battery cells on the first conveyor line and the second conveyor line at the same time, which can save equipment structure and ensure the consistency of the alignment of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of a dual-drive variable-pitch conveying straightening device provided in an embodiment of the present application.

[0022] Figure 2 A schematic diagram showing one perspective of the correction mechanism of the dual-drive variable-pitch conveying correction device provided in an embodiment of the present application.

[0023] Figure 3 A schematic diagram showing one perspective of the correction mechanism of the dual-drive variable-pitch conveying correction device provided in an embodiment of the present application.

[0024] Figure 4 The dual-drive variable-pitch conveying correction device provided in the embodiment of the present application omits the schematic diagram of the correction mechanism.

[0025] Figure 5 A schematic diagram of the first conveying line and the first driving mechanism of the dual-drive variable-distance conveying and straightening device provided in an embodiment of the present application.

[0026] Figure 6 A schematic diagram of a push plate A of a dual-drive variable-pitch conveying and straightening device provided in an embodiment of the present application.

[0027] The markings in the figure are: 1, base; 2, first conveyor line; 3, second conveyor line; 4, return mechanism; 5, first driving mechanism; 41, push plate A; 42, push plate B; 43, push plate a; 44, push plate b; 45, first synchronous belt transmission assembly; 46, second synchronous belt transmission assembly; 451, motor A; 452, driving pulley A; 453, driven pulley A; 454, synchronous belt A; 461, motor B; 462, driving pulley B; 463, driven pulley B; 464, synchronous belt B; 201, conveyor belt; 202, front end seat body; 203, rear end seat body; 20 4. Straight slide rail; 205. Slide seat; 206. Screw module; 207. Convex plate; 208. Driving wheel; 209. No. 1 driven wheel; 210. No. 2 driven wheel; 211. No. 3 driven wheel; 212. Tensioning wheel; 51. First motor; 52. First synchronous belt; 53. First pulley; 54. Rotating shaft; 55. Second pulley; 6. Height adjustment mechanism; 411. Connecting block; 412. Vertical plate; 413. Horizontal plate; 414. Cylindrical rod; 401. No. 1 waist-shaped groove; 402. No. 2 waist-shaped groove; 7. No. 1 linear guide; 8. No. 2 linear guide; 100. Battery cell. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 As shown, the present application provides a first embodiment, which is a BC battery sheet dual-drive variable-pitch conveying and correcting device, comprising a base 1, a first conveying line 2 and a second conveying line 3 arranged on the base 1 along the Y direction, and a first driving mechanism 5 for driving the first conveying line 2 and the second conveying line 3 to synchronously drive. The base 1 is also provided with a correcting mechanism 4. Figure 2 and Figure 3As shown, the correction mechanism 4 includes a push plate A41, a push plate a43, a push plate B42, a push plate b44, a first synchronous belt transmission component 45 and a second synchronous belt transmission component 46. The push plate A41, the push plate a43, the push plate B42 and the push plate b44 are all connected to the base 1 in a sliding manner along the Y direction. The first synchronous belt transmission component 45 includes a driving pulley A452, a driven pulley A453, a motor A451 that drives the driving pulley A452 to rotate, and a synchronous belt A454 that is connected to the driving pulley A452 and the driven pulley A453. The second synchronous belt transmission component 46 includes a drive pulley A452, a driven pulley A453, a motor A451 that drives the driving pulley A452 to rotate, and a synchronous belt A454 that is connected to the driving pulley A452 and the driven pulley A453. A driving pulley B462, a driven pulley B463, a motor B461 for driving the driving pulley B462 to rotate, and a synchronous belt B464 for transmission connection between the driving pulley B462 and the driven pulley B463 are on the base 1. Both sides of the synchronous belt A454 are fixedly connected to the push plate A41 and the push plate B42 respectively. Both sides of the synchronous belt B464 are fixedly connected to the push plate a43 and the push plate b44 respectively. The push plate A41 and the push plate B42 are respectively located on the outside of the first conveyor line 2 and the outside of the second conveyor line 3. The push plate a43 and the push plate b44 are respectively located on the inside of the first conveyor line 2 and the inside of the second conveyor line 3.

[0030] In actual use, the first conveyor line 2 and the second conveyor line 3 simultaneously receive the battery cells 100 and convey the battery cells 100. During the conveying process, the battery cells 100 on the first conveyor line 2 and the second conveyor line 3 are simultaneously corrected by the correction mechanism 4. During the correction, the driving pulley A452 is driven to rotate by the motor A451, and the synchronous belt A454 is driven with the cooperation of the driven pulley A453. During the transmission process of the synchronous belt A454, the push plate A41 and the push plate B42 are driven to move toward each other, and the battery cells 100 on the first conveyor line 2 and the battery cells 100 on the second conveyor line 3 are pushed inward from the outside. The driving pulley B462 is driven to rotate by the motor B461, and the synchronous belt B464 is driven with the cooperation of the driven pulley B463. During the transmission process of the synchronous belt B464, the push plate a43 and the push plate b44 are driven to move inward. By controlling the output power of motor A451 and motor B461, the rotation speeds of synchronous belt A454 and synchronous belt B464 are different, so that the distance that push plates A41 and push plates B42 push the battery cell 100 from the outside is different from the distance that push plates a43 and push plates b44 push the battery cell 100 from the inside.

[0031] In the above design, the structural design of the correction mechanism 4 can realize the separate adjustment of the left and right correction distances of the battery cell 100, realize the offset adjustment of the battery cell 100 in the conveying process, and ensure the accurate docking of the battery cell 100 with the flower basket.

[0032] Specifically: Figure 1 , Figure 4 and Figure 5 As shown, the first conveyor line 2 and the second conveyor line 3 have the same structure. The first conveyor line 2 includes a conveyor belt 201, a front end seat body 202 fixedly arranged on the base 1, a rear end seat body 203, a straight slide rail 204 with two ends respectively connected to the front end seat body 202 and the rear end seat body 203, a slide seat 205 slidably connected to the straight slide rail 204, a screw rod module 206 arranged on the base 1 for driving the slide seat 205 to slide along the straight slide rail 204, and a convex plate 207 arranged on the upper end of the slide seat 205 , a driving wheel 208 arranged on the front seat body 202, a No. 1 driven wheel 209 arranged on the rear seat body 203, a No. 2 driven wheel 210 arranged on the side of the convex plate 207 away from the front seat body 202, a No. 3 driven wheel 211 arranged on the slide 205, and a plurality of tensioning wheels 212 arranged on the front seat body 202, wherein the tensioning wheel 212, the driving wheel 208, the No. 1 driven wheel 209, the No. 2 driven wheel 210 and the No. 3 driven wheel 211 are connected by transmission through the transmission belt 201. The No. 2 driven wheel 210 and the No. 3 driven wheel 211 are both located on one side of the No. 1 driven wheel 209, and the horizontal distance between the No. 2 driven wheel 210 and the No. 1 driven wheel 209 is smaller than the horizontal distance between the No. 3 driven wheel 211 and the No. 1 driven wheel 209.

[0033] In actual use, the driving wheel 208 rotates under the drive of the first driving mechanism 5, and the transmission of the conveyor belt 201 is realized under the cooperation of the No. 1 driven wheel 209, the No. 2 driven wheel 210, the No. 3 driven wheel 211 and the tensioning wheel 212, so as to transport the battery cell 100. When it is necessary to change the conveying distance of the conveyor belt 201, the slide 205 is driven by the screw module 206 to slide along the straight slide rail 204, so that the No. 3 driven wheel 211 and the No. 2 driven wheel 210 move horizontally and synchronously, and the conveyor belt 201 is still in a tensioned state during and after the movement.

[0034] In the above design, the structural design of the first conveyor line 2 and the second conveyor line 3 can realize the stable conveyance of the battery cells 100 and the adjustment of the conveyance distance of the battery cells 100 .

[0035] Specifically: Figure 4 and Figure 5 As shown, the first driving mechanism 5 includes a first motor 51 fixedly arranged on the base 1, a first synchronous belt 52, a first pulley 53 coaxially fixedly arranged on the output shaft of the first motor 51, a rotating shaft 54 ​​coaxially fixedly connected to a plurality of driving wheels 208, and a second pulley 55 coaxially fixedly arranged on the rotating shaft 54. The first pulley 53 and the second pulley 55 are connected through the first synchronous belt 52.

[0036] In actual use, the first motor 51 drives the first pulley 53 to rotate, and the first synchronous belt 52 rotates with the cooperation of the second pulley 55, so that the first synchronous belt 52 drives the driving wheel 208 to rotate synchronously.

[0037] In the above design, the structural design and specific implementation of the first driving mechanism 5 can effectively realize the synchronous driving of the first conveyor line 2 and the second conveyor line 3 .

[0038] Specifically: Figure 1 As shown, the base 1 is also provided with a height adjustment mechanism 6 , which includes a plurality of bolts provided on the base 1 , and the lower ends of the bolts protrude from the lower end surface of the base 1 .

[0039] In actual use, the distance that the lower end of the bolt protrudes from the lower end surface of the base 1 is changed by adjusting the degree of screwing of the bolt on the base 1 .

[0040] In the above design, the height adjustment mechanism 6 is convenient for adjusting the actual application height of the entire device.

[0041] Specifically: Figure 3 and Figure 6 As shown, the push plate A41, push plate B42, push plate a43 and push plate b44 have the same structure. The push plate A41 includes a connecting block 411 which is slidably connected to the base 1 and fixedly connected to the synchronous belt A454, a vertical plate 412 bolted to the connecting block 411, a horizontal plate 413 bolted to the upper end of the vertical plate 412, and a plurality of cylindrical rods 414 arranged along the X direction at the upper end of the horizontal plate 413.

[0042] In actual use, the connecting block 411 follows the transmission of the synchronous belt A454, and the vertical plate 412, the horizontal plate 413 and the cylindrical rods 414 follow the connecting block 411 to move synchronously, and finally a plurality of cylindrical rods 414 are abutted against the outer side of the battery cell 100.

[0043] In the above design, the structural design and specific implementation of the push plate A41 can effectively ensure the abutment against the side of the battery cell 100 .

[0044] Specifically: Figure 6 As shown, the vertical plate 412 is provided with a plurality of No. 1 waist-shaped grooves 401 arranged along the Z direction and extending along the Z direction, and the connecting block 411 is provided with No. 1 screw holes matching with the No. 1 waist-shaped grooves 401 .

[0045] In actual use, when the height of the vertical plate 412 needs to be adjusted, different No. 1 waist-shaped grooves 401 or different positions of the same No. 1 waist-shaped groove 401 are matched with the No. 1 screw holes, and then locked with bolts.

[0046] In the above design, the structural design and specific implementation of the vertical plate 412 and the connecting block 411 can achieve the adjustment of the height of the vertical plate 412.

[0047] Specifically: Figure 6 As shown, the horizontal plate 413 is provided with a plurality of second waist-shaped grooves 402 arranged along the X direction and extending along the Y direction, and the upper end of the vertical plate 412 is provided with second screw holes matched with the second waist-shaped grooves 402 .

[0048] In actual use, when the horizontal position of the horizontal plate 413 relative to the battery cell 100 needs to be adjusted, the horizontal position of the horizontal plate 413 can be adjusted by adjusting the corresponding positions of the second screw hole and the second waist-shaped groove 402 .

[0049] In the above design, the structural design and specific implementation of the horizontal plate 413 and the vertical plate 412 can effectively achieve the horizontal adjustment of the horizontal plate 413 .

[0050] Specifically: Figure 2 and Figure 3 As shown, a No. 1 linear guide rail 7 and a No. 2 linear guide rail 8 are respectively provided on both sides of the base 1, and the push plate A41, push plate B42 and push plate a43 are all slidably connected to the No. 1 linear guide rail 7, and the push plate b44 is slidably connected to the No. 2 linear guide rail 8.

[0051] In actual use, driven by the synchronous belt A454, the push plate A41 and the push plate B42 slide relatively along the No. 1 linear guide 7, and driven by the synchronous belt B464, the push plate a43 and the push plate b44 move relatively along the No. 1 linear guide 7 and the No. 2 linear guide 8 respectively.

[0052] In the above design, the arrangement of the No. 1 linear guide rail 7 and the No. 2 linear guide rail 8 facilitates the sliding of the push plates A41, B42, a43 and b44.

[0053] Specifically: the synchronous belt A454 is arranged on the side of the base 1 located at the first linear guide rail 7, and the synchronous belt B464 is arranged on the upper end surface of the base 1.

[0054] In the above design, the assembly positions of the synchronous belt A454 and the synchronous belt B464 can ensure that there is no interference in the transmission.

[0055] The dual-drive variable-pitch conveying and correcting method for BC battery cells 100 adopts the dual-drive variable-pitch conveying and correcting device. The first conveyor line 2 and the second conveyor line 3 respectively convey two battery cells 100 synchronously. When passing through the correcting mechanism 4, the driving pulley A452 is driven to rotate by the motor A451, and the transmission of the synchronous belt A454 is realized with the cooperation of the driven pulley A453. During the transmission process of the synchronous belt A454, the push plate A41 and the push plate B42 are driven to move toward each other, respectively, and the battery cells 100 on the first conveyor line 2 and the battery cells 100 on the second conveyor line 3 are respectively pressed from the outside. Pushing inward, the active pulley B462 is driven to rotate by the motor B461, and the transmission of the synchronous belt B464 is realized with the cooperation of the driven pulley B463. During the transmission of the synchronous belt B464, the push plate a43 and the push plate b44 are driven to move oppositely. By controlling the output power of the motor A451 and the motor B461, the rotation speeds of the synchronous belt A454 and the synchronous belt B464 are different, so that the distance that the push plates A41 and B42 push the battery cell 100 from the outside is different from the distance that the push plates a43 and b44 push the battery cell 100 from the inside.

[0056] In the above design, the offset of the battery cells 100 on several adjacent conveyor tracks can be adjusted, so that the spacing of the battery cells 100 on the conveyor tracks when they are aligned is different, so that the battery cells 100 can accurately enter the basket connected to the conveyor track, thereby improving work efficiency and reducing the damage rate of the battery cells 100 when receiving the basket.

[0057] To further explain in detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A BC battery sheet dual-drive variable-pitch conveying and correcting device, comprising a base, a first conveying line and a second conveying line arranged on the base along the Y direction, and a first driving mechanism for driving the first conveying line and the second conveying line to synchronously drive, characterized in that: The base is also provided with a return mechanism, and the return mechanism includes a push plate A, a push plate a, a push plate B, a push plate b, a first synchronous belt transmission assembly and a second synchronous belt transmission assembly, and the push plate A, the push plate a, the push plate B and the push plate b are all connected to the base in a sliding manner along the Y direction, and the first synchronous belt transmission assembly includes a driving pulley A, a driven pulley A, a motor A that drives the driving pulley A to rotate, and a synchronous belt A that is connected to the driving pulley A and the driven pulley A in a transmission manner, and the second synchronous belt transmission assembly includes a driving pulley B, a driven pulley B, a motor B that drives the driving pulley B to rotate, and a synchronous belt A that is connected to the driving pulley B and the driven pulley B in a transmission manner. A synchronous belt B, the two sides of the synchronous belt A are fixedly connected to the push plates A and B respectively, the two sides of the synchronous belt B are fixedly connected to the push plates a and b respectively, the push plates A and B are respectively located on the outside of the first conveyor line and the outside of the second conveyor line, the push plates a and b are respectively located on the inside of the first conveyor line and the inside of the second conveyor line; a linear guide No. 1 and a linear guide No. 2 are respectively arranged on both sides of the base, the push plates A, B and a are all slidably connected to the linear guide No. 1, and the push plate b is slidably connected to the linear guide No. 2; the synchronous belt A is arranged on the side of the base located on the linear guide No. 1, and the synchronous belt B is arranged on the upper end surface of the base.

2. The BC battery sheet dual-drive variable-pitch conveying and correction device according to claim 1 is characterized in that: The first conveyor line and the second conveyor line have the same structure, and the first conveyor line includes a conveyor belt, a front end seat body fixedly arranged on a base, a rear end seat body, straight slide rails respectively connected to the front end seat body and the rear end seat body at two ends, a slide seat slidably connected to the straight slide rails, a screw rod module arranged on the base for driving the slide seat to slide along the straight slide rails, a convex plate arranged on the upper end of the slide seat, a driving wheel arranged on the front end seat body, a No. 1 driven wheel arranged on the rear end seat body, a No. 2 driven wheel arranged on the side of the convex plate away from the front end seat body, a No. 3 driven wheel arranged on the slide seat, and a plurality of tensioning wheels arranged on the front end seat body. The tensioning wheel, the driving wheel, the No. 1 driven wheel, the No. 2 driven wheel and the No. 3 driven wheel are connected through a conveyor belt transmission, the No. 2 driven wheel and the No. 3 driven wheel are both located on one side of the No. 1 driven wheel, and the horizontal distance between the No. 2 driven wheel and the No. 1 driven wheel is smaller than the horizontal distance between the No. 3 driven wheel and the No. 1 driven wheel.

3. The BC battery sheet dual-drive variable-pitch conveying and correction device according to claim 1 is characterized in that: The first driving mechanism includes a first motor fixedly arranged on a base, a first synchronous belt, a first pulley coaxially fixedly arranged on an output shaft of the first motor, a rotating shaft coaxially fixedly connected to a plurality of driving wheels, and a second pulley coaxially fixedly arranged on the rotating shaft. The first pulley and the second pulley are connected through a first synchronous belt transmission.

4. The BC battery sheet dual-drive variable-pitch conveying and correction device according to claim 1 is characterized in that: The base is also provided with a height adjustment mechanism, which includes a plurality of bolts arranged on the base, and the lower ends of the bolts protrude from the lower end surface of the base.

5. The BC battery sheet dual-drive variable-pitch conveying and correction device according to claim 1 is characterized in that: The push plates A, B, a and b have the same structure. The push plate A includes a connecting block that is slidably connected to the base and fixedly connected to the synchronous belt A, a vertical plate bolted to the connecting block, a horizontal plate bolted to the upper end of the vertical plate, and a plurality of cylindrical rods arranged along the X direction at the upper end of the horizontal plate.

6. The BC battery sheet dual-drive variable-pitch conveying and correction device according to claim 5 is characterized in that: The vertical plate is provided with a plurality of No. 1 waist-shaped grooves arranged along the Z direction and extending along the Z direction, and the connecting block is provided with a No. 1 screw hole matched with the No. 1 waist-shaped groove.

7. The BC battery sheet dual-drive variable-pitch conveying and correction device according to claim 5 is characterized in that: The horizontal plate is provided with a plurality of No. 2 waist-shaped grooves arranged along the X direction and extending along the Y direction, and the upper end of the vertical plate is provided with No. 2 screw holes matched with the No. 2 waist-shaped grooves.

8. A dual-drive variable-pitch conveying and correction method for BC battery cells, using a dual-drive variable-pitch conveying and correction device as claimed in any one of claims 1 to 7, characterized in that: The first conveyor line and the second conveyor line respectively convey two battery cells synchronously. When passing through the correcting mechanism, the active pulley A is driven to rotate by the motor A, and the transmission of the synchronous belt A is realized with the cooperation of the driven pulley A. During the transmission process of the synchronous belt A, the push plates A and B are driven to move toward each other, and the battery cells on the first conveyor line and the battery cells on the second conveyor line are pushed inward from the outside respectively. The active pulley B is driven to rotate by the motor B, and the transmission of the synchronous belt B is realized with the cooperation of the driven pulley B. During the transmission process of the synchronous belt B, the push plates a and b are driven to move in opposite directions. By controlling the output power of the motor A and the motor B, the rotation speeds of the synchronous belt A and the synchronous belt B are different, so that the distance that the push plates A and B push the battery cells from the outside is different from the distance that the push plates a and b push the battery cells from the inside.

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