CN214398471U

CN214398471U - Transfer chain with segmentation structure

Info

Publication number: CN214398471U
Application number: CN202023221568.6U
Authority: CN
Inventors: 雍江涛; 陈玉振; 吴鑫; 宋南海
Original assignee: Nanjing Bon Automation Technology Co ltd
Current assignee: Shenzhen Greensheng Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-10-15
Anticipated expiration: 2030-12-28

Abstract

A conveying line with a segmented structure is used for conveying battery cell pole pieces in an automatic assembly line and comprises a first segmented conveying line; a second section conveying line; the first subsection conveying line and the second subsection conveying line are arranged in a connected mode and are provided with subsection conveying lines with different lengths, and transition intervals are arranged at the connection positions; an image acquisition device; and the motor controller is used for respectively controlling the movement speeds of the conveying belts of the first section conveying line and the second section conveying line according to the position of the battery cell pole piece collected by the image collecting device.

Description

Transfer chain with segmentation structure

Technical Field

The utility model relates to an industrial automation control technical field, concretely relates to transfer chain with segmentation structure.

Background

Lithium batteries are widely used for industrial and consumer products represented by mobile phones, electric vehicles, unmanned aerial vehicles, and the like due to their excellent energy storage performance. In the structure of the lithium battery, a diaphragm is one of key inner layer components, and the diaphragm mainly has the functions of separating a positive electrode from a negative electrode of the battery, preventing the two electrodes from contacting and short-circuiting, and enabling electrolyte ions to pass through. The separator material is non-conductive, and the physical and chemical properties of the separator have a great influence on the performance of the battery. The battery is different in kind and the separator used is different. In the lithium battery system, since the electrolyte is an organic solvent system, a separator material resistant to an organic solvent is required, and a polyolefin porous film having a high strength and a thin film is generally used. The performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, directly influences the capacity, circulation, safety performance and other characteristics of the battery, and the diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery.

At present, the localization of lithium batteries is gradually realized in China, but how to design a production line in the automatic processing process of the lithium batteries improves the processing yield of battery core pole pieces in the lithium batteries and the working efficiency of the production line, and more efficient and safe production is still the subject of research in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model provides a conveying line with a segmented structure, which is used for conveying electric core pole pieces in an automatic assembly line, and comprises a first segmented conveying line, a second segmented conveying line and a conveying belt, wherein the first segmented conveying line comprises a motor and a conveying belt, and the conveying belt moves under the driving of the motor so as to convey the electric core pole pieces on the conveying belt; the second segmented conveying line comprises a motor and a conveying belt, and the conveying belt is driven by the motor to move so as to convey the battery cell pole pieces on the conveying belt; the first subsection conveying line and the second subsection conveying line are arranged in a connected mode and are provided with subsection conveying lines with different lengths, and transition intervals are arranged at the connection positions; the image acquisition device is used for acquiring the positions of the battery cell pole pieces conveyed on the first subsection conveying line and the second subsection conveying line; and the motor controller is used for respectively controlling the movement speeds of the conveying belts of the first section conveying line and the second section conveying line according to the positions of the battery cell pole pieces acquired by the image acquisition device.

Optionally, the negative pressure cavity is arranged inside the conveying belt, and negative pressure is generated to adsorb the battery cell pole piece on the conveying belt.

Optionally, the negative pressure cavity is not disposed at the transition interval.

Optionally, the conveying belt is arranged on the conveying line base frame, and the motor drives the cam on the conveying line base frame to rotate so as to drive the conveying belt to rotate around the conveying line base frame in a circulating manner.

Alternatively, the moving speed of the conveyor belt is controlled by controlling the rotational speed of the cam.

Optionally, the image acquisition device is arranged above the conveying line, and acquires position data of the battery cell pole piece on the conveying line along a vertical downward direction.

Optionally, the conveying line comprises a sheet taking station, and the sheet taking station is provided with a sheet taking manipulator and/or a pole piece posture recognition sensor.

Optionally, the motor controller, according to the position of the battery cell pole piece collected by the image collecting device, respectively controlling the movement speeds of the conveying belts of the first segment conveying line and the second segment conveying line, includes: and the controller respectively controls the first subsection conveying line and the second subsection conveying line to move for different distances at different speeds according to the position of the battery core pole piece acquired by the image acquisition device so as to convey the pole piece to the transition interval.

Optionally, the motor controller, according to the position of the battery cell pole piece collected by the image collecting device, respectively controlling the movement speeds of the conveying belts of the first segment conveying line and the second segment conveying line, includes: and the controller controls the first subsection conveying line and the second subsection conveying line to convey the pole pieces to pass through the transition interval at the same speed when the pole pieces pass through the transition interval according to the position of the battery core pole piece acquired by the image acquisition device.

Optionally, the motor controller, according to the position of the battery cell pole piece collected by the image collecting device, respectively controlling the movement speeds of the conveying belts of the first segment conveying line and the second segment conveying line, includes: and the controller respectively controls the first subsection conveying line and the second subsection conveying line to move for different preset distances at different speeds after the pole pieces pass through the transition interval according to the position of the battery core pole piece acquired by the image acquisition device.

Based on the utility model provides a transfer chain can design different length segmentation transfer chains, appears skidding when avoiding the pole piece to transmit on the transfer chain, phenomenons such as fold.

Drawings

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a schematic view of a lithium battery processing line according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a bare chip transferring robot according to an embodiment of the present invention;

fig. 3 is a top view of the conveying line with a segmented structure provided by the embodiment of the present invention;

fig. 4 is a front view of the conveying line with a segmented structure provided by the embodiment of the invention;

fig. 5 is a top view of a single conveyor line provided by an embodiment of the present invention;

fig. 6 is a front view of a single conveyor line provided by an embodiment of the present invention;

fig. 7 is a schematic structural view of a sheet taking manipulator provided by an embodiment of the present invention;

fig. 8 is a schematic structural view of a sheet taking manipulator provided in an embodiment of the present invention;

fig. 9 is a schematic structural view of a sheet taking manipulator provided by the embodiment of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

The first embodiment is as follows:

as shown in fig. 1, there is shown an automated lamination line comprising: the lamination table circulation line comprises a plurality of lamination tables 2, and when the lamination table circulation line rotates, the plurality of lamination tables 2 circularly rotate along a fixed direction on the lamination table circulation line; the first rotary mechanical hand 6 is arranged on the circulation line of the lamination table and is used for placing a bottom-layer diaphragm on the lamination table through rotary operation; the second rotary mechanical arm 7 is arranged behind the first rotary mechanical arm 6 on the circulation line of the lamination table and is used for stacking a first pole piece on a bottom-layer diaphragm through rotary operation; the third rotary mechanical arm 3 is arranged behind the second rotary mechanical arm 7 on the circulation line of the lamination table and is used for stacking a middle-layer diaphragm on the first pole piece through rotary operation; and the fourth rotary mechanical hand 4 is arranged behind the third rotary mechanical hand 3 on the circulation line of the lamination table and is used for stacking a second pole piece on the middle-layer diaphragm through rotary operation. The lamination table flow line is annular, and the number of the lamination tables 2 is set according to the length of the lamination table flow line.

The first pole piece is a positive pole piece, and the second pole piece is a negative pole piece; or, the first pole piece is a negative pole piece, and the second pole piece is a positive pole piece.

The equipment further comprises a rubberizing conveyor, and the rubberizing conveyor conveys the stacked battery core pole pieces on the lamination table to be rubberized. The rubberizing conveyer 5 is provided with a rubberizing station, when the rubberizing station is occupied, a lamination table circulation line continues to rotate, and the first rotary mechanical arm 6, the second rotary mechanical arm 7, the third rotary mechanical arm 3 and the fourth rotary mechanical arm 4 stop rotating lamination movement.

The first rotary mechanical arm 6, the second rotary mechanical arm 7, the third rotary mechanical arm 3 and the fourth rotary mechanical arm 4 all comprise CCD visual detectors, and whether the current lamination is aligned with the previous lamination or not is judged through the visual detectors.

The first rotary manipulator 6, the second rotary manipulator 7, the third rotary manipulator 3 and the fourth rotary manipulator 4 all comprise four adsorption plates 8.

Four adsorption plate rotational symmetry, and produce suction when rotatory to getting the material station, adsorb lamination subassembly.

The first rotary manipulator 6, the second rotary manipulator 7, the third rotary manipulator 3 and the fourth rotary manipulator 4 are also provided with a lifting mechanism for controlling the lifting of the rotary manipulators.

Based on the technical scheme provided by the embodiment one, the lamination precision can be improved, the quality of the lithium battery is effectively improved, meanwhile, the lamination efficiency can be improved in the form of high-speed circulation lamination, and the structure of the multi-lamination platform can enable the system to have great redundancy, so that flexible expansion can be carried out, and the lamination efficiency is further improved.

Example two:

in the in-line working environment of the first embodiment, a vacuum belt with negative pressure is used to transfer the pole pieces from the die cutting equipment or the laminating equipment directly to the laminating equipment. The transfer belts are not of equal length due to factors such as equipment space or layout of the lamination stations. In the multi-station lamination equipment, the intervals of the belt conveying pole pieces are required to be equal as much as possible, and in the transfer process, the pole pieces cannot stop at the joint of the belt and the belt when the belt stops.

Therefore, during structural design, reasonable layout lamination stations need to be considered, corresponding to pole pieces with different sizes, and the lamination taking station is ensured to be always at the last position of each section of belt. Since a piece of equipment is generally compatible with small and large scale production, the design process often fails to ensure that all types of cell pole pieces are within the range of pole pieces available for lamination. Therefore, the production line cannot meet the processing requirements of pole pieces of all models (sizes). The lamination taking positions cannot be flexibly arranged, and the cost is increased due to the replacement of equipment.

This embodiment will suggest a transfer line having a segmented structure, which comprises a first segmented transfer line 11 and a second segmented transfer line 12, as shown in fig. 3 and 4. The first and second

segment conveying lines

11 and 12 respectively include a motor and a conveying belt 15. The conveying belt moves under the driving of the motor and is used for conveying the battery core pole pieces on the conveying belt. The negative pressure cavity 14 is arranged inside the conveying belt 15 and generates negative pressure to adsorb the battery pole pieces on the conveying belt 15. Because of the structural limitation, the negative pressure cavity 14 is not arranged at the transition interval, and the pole pieces cannot be effectively prevented from slipping in the transportation process because the negative pressure cavity is not arranged, however, the best speed matching between the two segmental conveying lines is easily realized because the negative pressure cavity is not arranged.

The first and second

segment transfer lines

11 and 12 may have the same length, but for engineering design, it is often necessary to design the first and second

segment transfer lines

11 and 12 having different lengths. The pole piece appears fold or phenomenon of skidding easily when the joint between the transfer chain is transmitted this moment.

Therefore, on one hand, the first segment conveying line 11 and the second segment conveying line 12 which are arranged in a joint mode are set to be different in length so as to meet engineering requirements, and on the other hand, transmission of pole pieces at the joint position with the transition interval 13 is designed. Specifically, an image acquisition device is arranged to acquire the positions of the cell pole pieces conveyed on the first subsection conveying line and the second subsection conveying line; and the motor controller is matched with the image acquisition device for use, and respectively controls the movement speeds of the conveying belts of the first segmental conveying line and the second segmental conveying line according to the position of the battery pole piece acquired by the image acquisition device. The image acquisition device can be arranged above the conveying line and acquires the position data of the battery cell pole piece on the conveying line along the vertical downward direction. The position data obtained by the pattern acquisition device can be used for respectively adjusting the speeds of the two conveying lines, so that the pole piece is ensured to be difficult to slip, wrinkle and the like when passing through the transition interval 13 as much as possible.

The technical scheme based on this embodiment can reach beneficial effect: the different length segmentation transfer chain of design, phenomenons such as the pole piece appears skidding when guaranteeing the pole piece to transmit on the transfer chain, fold can satisfy the pole piece of multiple size and transmit on the transfer chain.

Example three:

the scheme of the present embodiment will be further described below on the basis of the second embodiment, with reference to fig. 7.

In the foregoing conveying line with a segmented structure, the controlling, by the motor controller, the movement speeds of the conveying belts of the first segmented conveying line and the second segmented conveying line, respectively, according to the positions of the cell pole pieces acquired by the image acquisition device includes:

the controller respectively controls the first subsection conveying line and the second subsection conveying line to move for different distances at different speeds according to the position of the battery core pole piece acquired by the image acquisition device so as to convey the pole piece to the transition interval;

and the controller controls the first subsection conveying line and the second subsection conveying line to convey the pole pieces to pass through the transition interval at the same speed when the pole pieces pass through the transition interval according to the position of the battery core pole piece acquired by the image acquisition device.

And the controller respectively controls the first section conveying line and the second section conveying line to move for different preset distances at different speeds after the pole pieces pass through the transition interval (13) according to the position of the battery core pole piece acquired by the image acquisition device.

In one example, the first and second segment conveying lines are controlled to move by a first length (o) and a second length (a), respectively, after being started. In the process, the first subsection conveying line and the second subsection conveying line are in a non-uniform speed process, different distances are carried out in the same time period, and the foremost pole pieces on the two conveying lines are conveyed to the edge of the conveying lines at the same time, namely the pole pieces are about to enter the transition interval 13. Thereafter, throughout the passage of the pole piece through the transition space 13, the two transport lines will remain transporting at the same rate, both transport lines moving at the same rate over a distance d, d being the length of one pole piece. For design reasons, the distance of the constant-speed movement may be a correction value δ d which is slightly larger than d and is added on the basis of the distance d, wherein δ d takes the size and the error of the transition interval into consideration.

After the pole piece has passed the transition gap 13, the two lines will continue to move the distance p and b at different rates so that the position of the pole piece on the belt is equivalent to completing one cycle back to the distance o and a from the line edge, respectively. In this process, the correction introduced when the pole piece passes through the transition interval 13 is taken into account for subtraction.

And then, the control system transmits the film position information on the belt and informs a manipulator at a station near the belt to take the film or take pictures and the like. And (5) finishing the action of the stations near the belt, and repeating the steps.

The control process reflects the speed curve and an electronic cam table established by a PLC program, wherein the cam number in the table is composed of three key points according to the situation. The connection between points uses 3 times curve, straight line, 3 times curve respectively.

And operating the compiled PLC and recording an operating curve.

"run cam table to parameter 1", this section of belt 1 and belt 2 run "HM I feeding belt 1L 1" at the speed calculated by the electronic cam, it can be seen that the belt 1 and belt 2 and the virtual spindle speed are different from each other.

"run cam table to parameter 2" this section of belt 1 and belt 2 run "HM I feeding belt 1L1+ pole piece width" at the speed calculated by the electronic cam. The speed of the section of belt 1, the belt 2 and the virtual main shaft is constant, and the pole piece is ensured not to have position deviation when the belt and the belt are in transition.

"run cam table to parameter 3" the length of belt 1 and belt 2 run "HM I loading belt 1L 2" at electronically cammed speed, each belt speed being related to position setting.

The technical scheme based on this embodiment can reach beneficial effect: the different length segmentation transfer chain of design, phenomenons such as the pole piece appears skidding when guaranteeing the pole piece to transmit on the transfer chain, fold can satisfy the pole piece of multiple size and transmit on the transfer chain. The pole pieces with unequal intervals on different belts are transferred, the belts run smoothly in the transfer process, and the pole pieces do not shake or shift relative positions.

Example four:

the present embodiment will further describe the structure of the conveying line on the basis of the foregoing embodiments, with reference to fig. 5 and 6:

conveyor belt 15 sets up on the transfer chain bed frame, the motor is through driving the cam rotation on the transfer chain bed frame to drive conveyor belt 15 winds the transfer chain bed frame circulation rotates.

The moving speed of the conveyor belt 15 can be controlled by controlling the rotational speed of the cam.

And a piece taking station is arranged on one side of the conveying belt, and a piece taking manipulator and/or a pole piece posture recognition sensor are/is arranged on the piece taking station.

The station pick robot is shown in fig. 7-9. For the sake of clarity of the description of the present embodiment, the direction in which the manipulator slides horizontally along the guide rail is defined as the 'X' direction, and the motor driving the manipulator to move in the X direction is an X-axis motor, which may be a linear motor. The motor body may be mounted on a back plate, connected by a back plate guide rail, and at the same time, the motor body may slide up and down in a vertical direction with respect to the back plate, the vertical direction being defined as a 'Z' direction, and a direction perpendicular to the 'X' and 'Z' directions being a 'Y' direction. The entire motor may be driven by a linear motor to slide in the X direction, or may be driven by a Z-axis servo motor 1101 to move up and down in the Z direction.

The moving motor body in the Z direction includes a main frame plate 1111 having an 'L' shape, i.e., a horizontal plate 11111 and a vertical plate 11112 perpendicular to each other. Vertical board 11112 is driven by the Z-axis servo motor, specifically, the Z-axis servo motor is connected with a vertical ball screw 1104, and the vertical board 11112 of the 'L' -shaped main frame board is connected with the ball screw 1104, and when the Z-axis servo motor generates driving force, it is a rotating torque force, and this torque force is converted into the driving force of the vertical direction through the ball screw 1104, so that when the Z-axis servo motor is driven, the ball screw can be driven, and the ball screw moves the main frame board up and down in the Z direction through its connection with the vertical board 11112.

The main frame plate 1111 also has a horizontal plate 11111 part, which moves in the X direction and the Z direction along with the movement of the main frame plate, and the horizontal chassis plate is loaded with the deviation rectifying device, on one hand, the deviation rectifying device 1112 is installed on the horizontal plate 11111 through a Y-axis electric cylinder 1107 and a Y-direction slide rail, and when the Y-axis electric cylinder generates driving force, the deviation rectifying device is driven to move in the Y direction along the Y-direction slide rail; on the other hand, the deviation correcting device is connected with a sucker plate 1108 arranged below the main frame plate 1111 through a rotating shaft 11121, and the sucker plate 1108 can rotate by taking the rotating shaft as the center; on the side of the suction plate remote from the axis of rotation there is a cam shaft 1106, the centre of the suction plate 1108 being parallel to the Y-axis when the cam shaft is in a rest position, and the cam structure causing the suction plate to deviate from being parallel to the Y-axis when the cam shaft is rotated, which deviation is defined as the angle of the theta-axis. The angle through which the suction plate rotates with respect to the Y axis is called an angle θ due to the driving of the cam structure, and the posture of the suction plate can be controlled by controlling the cam shaft by a servo motor 1105 of the axis θ to control the angle.

For example, in one example, the deflection of the sucker plate swinging on the X axis is 15mm by setting the diameter difference between the long side and the short side of the cam shaft, the rotation radius from the cam shaft 1106 to the rotation center 11121 is 270mm, and the angle θ can be obtained by the deflection distance and the rotation radius.

This angle is typically between-2 ° and 2 °, but values within 2 ° or slightly larger, for example no larger than 5 °, may also be used depending on the operating conditions.

Therefore, after the sucker plate sucks up one pole piece, the sucker plate can be controlled to rotate through the theta-axis servo motor 1105 so as to adjust the angle of the pole piece, and the Y-axis electric cylinder drives the deviation correcting part to move on the Y axis so as to adjust the position of the pole piece in the Y direction; the position of the pole piece in the X-axis direction is adjusted through the driving of an X-axis motor, and the position of the pole piece in the Z direction is adjusted through a Z-axis servo motor and a ball screw.

In the working process, the standard posture and the spacing of the pole pieces are set through an industrial personal computer. After the sucker plate absorbs one pole piece, the (X, Y, theta) parameters of the absorbed pole piece can be calculated through the shooting of the CCD (not shown in the figure, the CCD is used for obtaining the attitude projection of the pole piece on the XY plane along the Z axis) and the pattern recognition function, and the Z parameters can be fed back through a motor shaft sensor. Since the pole piece is finally placed on the diaphragm, the Z-axis height of the pole piece does not affect the posture of the pole piece, and the X-axis only affects the position of the pole piece, the posture of the pole piece can be adjusted through the (Y, theta) parameters. For example, if the standard posture of the pole piece is (Y1, θ 1), the posture can be adjusted by controlling the θ -axis servo motor 1105 to rotate by an angle (θ 1 — θ) and translating to Y1 by the Y-axis cylinder. Of course, the distance from the pole piece attitude to the standard attitude can also be calculated through a trigonometric function, and the (Y, theta) parameters are adjusted to carry out translation and rotation.

After the posture of the pole pieces is adjusted, the distance between the pole pieces can be controlled by controlling the translation of the X-axis motor, and the pole pieces can be arranged at equal intervals or arranged at unequal intervals.

The embodiment has the following beneficial effects: the posture of the pole piece can be flexibly adjusted and corrected during the pole piece taking, and the space between the pole pieces can be flexibly controlled.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A conveyor line with a segmented structure for transporting cell pole pieces in an automated assembly line, the conveyor line comprising:

the first segmented conveying line (11) comprises a motor and a conveying belt (15), and the conveying belt is driven by the motor to move so as to convey the battery cell pole pieces on the conveying belt;

the second segmented conveying line (12) comprises a motor and a conveying belt (15), and the conveying belt is driven by the motor to move so as to convey the battery core pole pieces on the conveying belt;

the first subsection conveying line (11) and the second subsection conveying line (12) are arranged in a joint mode and are provided with subsection conveying lines with different lengths, and a transition interval (13) is arranged at the joint;

the image acquisition device is used for acquiring the positions of the battery cell pole pieces conveyed on the first subsection conveying line and the second subsection conveying line;

and the motor controller is used for respectively controlling the movement speeds of the conveying belts of the first section conveying line and the second section conveying line according to the positions of the battery cell pole pieces acquired by the image acquisition device.

2. Conveying line according to claim 1, characterized in that a negative pressure chamber (14) is arranged inside the conveying belt (15) to generate negative pressure for adsorbing the cell pole pieces on the conveying belt (15).

3. Conveying wire according to claim 2, characterised in that the underpressure chamber (14) is not arranged in the transition space (13).

4. Conveyor line according to claim 1, characterized in that the conveyor belt (15) is arranged on a conveyor line base frame, and the motor rotates the conveyor belt (15) around the conveyor line base frame by driving a cam on the conveyor line base frame.

5. Conveyor line according to claim 4, characterized in that the speed of movement of the conveyor belt (15) is controlled by controlling the speed of rotation of the cam.

6. The conveying line according to claim 5, wherein an image acquisition device is arranged above the conveying line and used for acquiring position data of the cell pole pieces on the conveying line along a vertically downward direction.

7. Conveying line according to claim 1, characterized in that it comprises a pick-up station provided with a pick-up robot and/or a pole piece attitude recognition sensor.

8. Conveyor line according to claim 1, characterized in that:

and the motor controller respectively controls the first section conveying line and the second section conveying line to move for different distances at different speeds according to the position of the battery core pole piece acquired by the image acquisition device so as to convey the pole piece to the transition interval (13).

9. Conveyor line according to claim 8, characterized in that:

and the motor controller controls the first section conveying line and the second section conveying line to convey pole pieces to pass through the transition interval (13) at the same speed according to the position of the cell pole piece acquired by the image acquisition device when the pole piece passes through the transition interval (13).

10. Conveyor line according to claim 9, characterized in that:

and the motor controller respectively controls the first section conveying line and the second section conveying line to move at different speeds for different preset distances after the pole pieces pass through the transition interval (13) according to the position of the battery core pole piece acquired by the image acquisition device.