Laminating machine and laminating method

Abstract

The invention discloses a lamination machine and a lamination method, and the lamination machine comprises a lamination table which can move in a reciprocating manner along a first direction, and the side edge of the lamination table is provided with a diaphragm pressing claw; the first pole piece feeding mechanism comprises a first piece placing manipulator for conveying a first pole piece to the lamination table; the second pole piece feeding mechanism comprises a second piece placing manipulator for conveying a second pole piece to the lamination table; the diaphragm placing mechanism comprises a diaphragm pushing part capable of reciprocating along the first direction, a pole piece picking part is arranged on the bottom surface of the diaphragm pushing part, and the diaphragm pushing part forms the second pole piece placing manipulator; the diaphragm pushing part and the lamination table can move oppositely or move away from each other in the first direction, and when the diaphragm pushing part moves from the diaphragm taking position to the diaphragm placing position in the first direction, the first end of the diaphragm pushing part pushes the diaphragm to move, and the diaphragm is laid on the lamination table. The lamination efficiency can be improved, and the cost can be effectively controlled.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lithium battery manufacturing equipment, and particularly relates to a lamination machine and a lamination method for lithium ion cell production and manufacturing. BACKGROUND

[0002] The cell of a lithium ion battery is usually produced by using two processes, i.e., a winding process and a lamination process. The lamination process is to alternately stack the cut positive and negative electrode sheets by using a lamination machine to form a stacked cell. The lithium battery manufactured by using the lamination process has advantages in energy density, internal resistance, battery rate and cycle life. In the traditional lamination process, the basic action of the lamination machine is to swing left and right above the lamination table by using a separator placing mechanism to form a Z-shaped layering structure of the separator on the lamination table, and to sequentially place the positive and negative electrode sheets during the swinging and placing process of the separator to form a stacked cell. Since the electrode sheet placement needs to wait for the complete placement of the separator, there is a speed bottleneck, especially when producing large cells, the waiting time is longer, and therefore, the production efficiency of the lamination process is relatively lower than that of the winding process. In order to improve the efficiency, a new type of hot compounding lamination process appears on the market. The main principle of this process is to compound the separator and the electrode sheet by heating first, so as to break through the limitation of the placing speed of the separator and improve the speed when stacking the positive and negative electrode sheets. However, this process has the following problems. On the one hand, the requirement for the separator material is relatively high, which increases the material cost. On the other hand, since the hot compounding process is newly added, the corresponding hot compounding equipment needs to be added, which requires a large one-time investment and increases the production cost. SUMMARY

[0003] The application aims to provide a lamination machine and a lamination method which can improve the lamination efficiency and are beneficial to controlling the production cost.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical solutions:

[0005] The lamination machine comprises a lamination table, a first electrode sheet feeding mechanism, a second electrode sheet feeding mechanism and a separator swinging mechanism. The lamination table is reciprocally movable along a first direction, and the side edge of the lamination table is provided with a separator pressing claw. The first electrode sheet feeding mechanism comprises a first sheet placing manipulator for feeding the first electrode sheet to the lamination table. The second electrode sheet feeding mechanism comprises a second sheet placing manipulator for feeding the second electrode sheet to the lamination table. The separator swinging mechanism comprises a separator pushing part which is reciprocally movable along the first direction. The bottom surface of the separator pushing part is provided with an electrode sheet picking part, and the separator pushing part constitutes the second electrode sheet placing manipulator. The separator pushing part and the lamination table are movable towards or away from each other along the first direction. When the separator pushing part moves from a sheet picking position to a sheet placing position along the first direction, the first end of the separator pushing part pushes the separator to move and lay the separator on the lamination table.

[0006] In some embodiments, the first end of the membrane pushing part is provided with a membrane passing roller, which pushes the membrane to move.

[0007] In some embodiments, the first pole piece feeding mechanism further comprises a first pole piece feeding mechanism, a first pole piece feeding manipulator, a first pole piece vision rectification platform and a first vision detection sensor; the first pole piece feeding manipulator and the first pole piece feeding manipulator can reciprocate along the second direction, the first pole piece vision rectification platform is arranged between the first pole piece feeding manipulator and the first pole piece feeding manipulator, the first pole piece feeding manipulator is used to send the first pole piece from the first pole piece feeding mechanism to the first pole piece vision rectification platform, and the first pole piece feeding manipulator is used to send the first pole piece from the first pole piece vision rectification platform to the stacking table.

[0008] In some embodiments, the first vision detection sensor comprises five CCD cameras arranged above the first pole piece vision rectification platform.

[0009] In some embodiments, the second pole piece feeding mechanism further comprises a second pole piece feeding mechanism, a second pole piece feeding manipulator, a second pole piece vision rectification platform and a second vision detection sensor; the second pole piece feeding manipulator can reciprocate along the second direction, the second pole piece vision rectification platform is arranged between the second pole piece feeding manipulator and the membrane placing mechanism, the second pole piece feeding manipulator is used to send the second pole piece from the second pole piece feeding mechanism to the second pole piece vision rectification platform, and the membrane pushing part sends the second pole piece from the second pole piece vision rectification platform to the stacking table.

[0010] In some embodiments, the second vision detection sensor comprises five CCD cameras arranged above the second pole piece vision rectification platform.

[0011] In some embodiments, the second direction and the first direction are perpendicular.

[0012] In some embodiments, the membrane pushing part can move along the vertical direction.

[0013] In some embodiments, further comprising a membrane unwinding mechanism, the membrane unwinding mechanism comprises a membrane unwinding roller arranged to wind a membrane, a plurality of membrane buffer rollers and a membrane cutter, and the membrane placing mechanism is arranged at the discharge end of the membrane unwinding mechanism.

[0014] The method for stacking using the aforementioned stacking machine comprises the following steps:

[0015] After the membrane is unwound, the free end of the membrane is fixed on the stacking table;

[0016] The push diaphragm part picks up the second pole piece and pushes the diaphragm to the laminating table along the first direction, and the laminating table also moves along the first direction and the push diaphragm part;

[0017] The laminating table stops when moving to the first position, at this time, the push diaphragm part moves above the laminating table and lays the diaphragm on the laminating table, the second pole piece is sent to the diaphragm sandwich by the push diaphragm part, the push diaphragm part puts down the second pole piece, and the diaphragm pressing jaw fixes the diaphragm and the second pole piece on the laminating table;

[0018] The push diaphragm part retreats and resets, and the laminating table also retreats and resets;

[0019] The laminating table resets to the second position, the first pole piece is laid on the diaphragm by the first pole piece laying mechanism, the diaphragm and the first pole piece are fixed on the laminating table by the diaphragm pressing jaw, and the laminating of one layer of the battery cell is completed;

[0020] The push diaphragm part resets to the pole piece picking position to pick up the second pole piece, and the foregoing steps are repeated to laminate the next layer of the battery cell.

[0021] According to the technical scheme, the pole piece picking part is arranged on the push diaphragm part, so that the push diaphragm part has the function of moving and sending the pole piece, the diaphragm can be laid on the laminating table with the pole piece, the pole piece can be put down after the diaphragm is laid on the laminating table, two processes are realized by one action, the time of laminating the pole piece is saved, and the efficiency is improved. Moreover, when the diaphragm is laid, the laminating table and the push diaphragm part move towards each other at the same time, the moving stroke of a single part (the laminating table or the push diaphragm part) is reduced, the action efficiency is improved, the function layout of the laminating is optimized, and the action rhythm is more reasonable. The laminating machine can be compatible with the original laminating process, a new process or special equipment does not need to be added, and the cost can be effectively controlled. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating labor.

[0023] Figure 1 It is a structure schematic view of the laminating machine of the embodiment of the present application;

[0024] Figure 2 It is a top view of the laminating machine of the embodiment of the present application;

[0025] Figure 3 It is a structure schematic view of the first pole piece feeding mechanism, the diaphragm laying mechanism and the laminating table of the embodiment of the present application;

[0026] Figure 4 Structure diagram of the laminating table of the embodiment of the present application;

[0027] Figure 5 Structure diagram of the diaphragm placing mechanism of the embodiment of the present application;

[0028] Figure 6 Structure diagram of the diaphragm placing mechanism of the embodiment of the present application;

[0029] Figure 7 Structure diagram of the diaphragm placing mechanism of the embodiment of the present application;

[0030] Figure 8 Structure diagram of the diaphragm placing mechanism of the embodiment of the present application;

[0031] Figure 9 Structure diagram of the diaphragm placing mechanism of the embodiment of the present application;

[0032] Figure 10 Structure diagram of the diaphragm placing mechanism of the embodiment of the present application;

[0033] The specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0034] The present application is described in detail below in conjunction with the accompanying drawings. In the detailed description of the embodiments of the present application, the drawings of the device structures are partially enlarged without the general scale for the convenience of description, and the described schematic diagrams are only examples, which should not limit the scope of protection of the present application. It should be noted that the drawings are simplified and all use non-precise scales, only to facilitate and clearly assist the purpose of describing the embodiments of the present application. Meanwhile, in the description of the present application, the terms “first”, “second”, etc. are only used for differentiation, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features; the terms “positive”, “negative”, “bottom”, “upper”, “lower”, etc. indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the stacking machine of this embodiment includes a machine base 1, on which a first electrode feeding mechanism 2, a second electrode feeding mechanism 3, a stacking table 4, a diaphragm placement mechanism 5, and a diaphragm placement mechanism 6 are arranged. In this embodiment, the stacking table 4 is located between the first electrode feeding mechanism 2 and the second electrode feeding mechanism 3, and the stacking table 4 can move along a first direction (…). Figure 2 The first electrode (in the direction indicated by the hollow arrow) is reciprocated on the machine base 1. Two types of electrodes are stacked sequentially on the stacking table 4, with the electrodes separated by diaphragms. The first and second electrodes are two types of electrodes with opposite polarities. In this embodiment, the first electrode is a positive electrode and the second electrode is a negative electrode, as an example for explanation.

[0037] The first electrode feeding mechanism 2 includes at least a first electrode feeding mechanism 2-1 and a first electrode placement robot 2-2. The first electrode feeding mechanism 2-1 is used to store the cut first electrodes. In this embodiment, the first electrode feeding mechanism 2-1 adopts a spring-loaded feeding mechanism, which supplies the stacked first electrodes sequentially from bottom to top, facilitating orderly picking by the robot. The first electrode placement robot 2-2 is used to place the first electrodes onto the stacking table 4.

[0038] The first electrode feeding mechanism 2 in this embodiment also includes a first electrode visual correction platform 2-3, a first electrode feeding robot 2-4, and a first visual inspection sensor 2-5. The first electrode visual correction platform 2-3 is located between the first electrode feeding robot 2-4 and the first electrode placement robot 2-2. After picking up the first electrode from the first electrode feeding mechanism 2-1, the first electrode feeding robot 2-4 sends the first electrode to the first electrode visual correction platform 2-3 for visual inspection and correction. The first electrode placement robot 2-2 then picks up the qualified first electrode from the first electrode visual correction platform 2-3 and sends it to the stacking table 4. The first visual inspection sensor 2-5 is located above the first electrode visual correction platform 2-3 and includes five CCD cameras, which are used to take pictures of the four corners of the electrode and the electrode as a whole, respectively, to detect whether the edges of the electrode are warped, whether there are folded edges, or other appearance defects.

[0039] In this embodiment, both the first wafer placement robot 2-2 and the first wafer feeding robot 2-4 can reciprocate in the horizontal direction, thereby conveying the first electrode sheet from the first electrode sheet feeding mechanism 2-1 to the first electrode sheet visual correction platform 2-3, and then from the first electrode sheet visual correction platform 2-3 to the stacking table 4. In this embodiment, both the first wafer placement robot 2-2 and the first wafer feeding robot 2-4 move along the second direction ( Figure 2 The first electrode placement robot 2-2 and the first electrode delivery robot 2-4 reciprocate in the direction indicated by the solid arrow. Both robots use suction cups to pick up the electrodes; that is, the electrode picking part of the robot is a vacuum suction cup, which picks up the electrode and then moves it. The reciprocating movement of the first electrode placement robot 2-2 and the first electrode delivery robot 2-4 can be controlled by conventional drive units such as motors, linear modules, and cylinders. In this embodiment, the second direction is perpendicular to the first direction.

[0040] In this embodiment, a gate-shaped first support 7 is provided on the machine base 1. A first slide rail 7-1 extending horizontally along a second direction is provided on the first support 7. A first wafer placement robot 2-2 and a first wafer feeding robot 2-4 are both mounted on the first slide rail 7-1 and can reciprocate along the first slide rail 7-1, thereby realizing the feeding and placement of the first electrode sheet. Optionally, to facilitate the picking and placing of the electrode sheet, in some embodiments, the first wafer feeding robot 2-4 and the first wafer placement robot 2-2 can also move vertically. By controlling the lifting and lowering of the robots, the electrode sheet can be picked up or placed more effectively. The lifting and lowering of the robots can be controlled by a cylinder.

[0041] The second electrode feeding mechanism 3 includes at least a second electrode feeding mechanism 3-1 and a second electrode placement robot. The second electrode feeding mechanism 3-1 is used to store the cut second electrodes. In this embodiment, the second electrode feeding mechanism also adopts a spring-loaded feeding mechanism. The second electrode placement robot is used to place the second electrodes onto the stacking table 4.

[0042] The second pole piece visual rectification platform 3-3 is located between the second piece feeding manipulator 3-4 and the second piece placing manipulator, the second pole piece feeding manipulator 4-4 picks up the second pole piece from the second pole piece feeding mechanism 3-1 and feeds the second pole piece to the second pole piece visual rectification platform 3-3 for visual detection and rectification. The second pole piece visual rectification platform 3-3 is located between the second piece feeding manipulator 3-4 and the second piece placing manipulator, the second pole piece feeding manipulator 4-4 picks up the second pole piece from the second pole piece feeding mechanism 3-1 and feeds the second pole piece to the second pole piece visual rectification platform 3-3 for visual detection and rectification. The second piece placing manipulator picks up the second pole piece that has completed visual detection from the second pole piece visual rectification platform 3-3 and feeds the second pole piece to the piece stacking table 4. The second visual detection sensor 3-5 is arranged above the second pole piece visual rectification platform 3-3, the structure of the second visual detection sensor 3-5 of the embodiment is the same as that of the first visual detection sensor 2-5, and the second visual detection sensor 3-5 also includes five CCD cameras, which are respectively used for photographing four corners of the pole piece and the whole pole piece. The rectification platform can adjust the position of the pole piece by rotation, so as to rectify the position of the pole piece. The rectification platform has the same structure as the rectification platform of the conventional piece stacking machine, and the present application does not improve the structure of the rectification platform, which will not be described here.

[0043] The second piece feeding manipulator 3-4 and the first piece placing manipulator 2-2 of the embodiment are oppositely arranged, and the second piece feeding manipulator 3-4 can reciprocate along the second direction. The machine table 1 of the embodiment is provided with a second support 8 in the shape of a door. The second support 8 is provided with a second sliding rail (not shown) extending horizontally along the second direction, and the second pole piece feeding manipulator 3-4 is arranged on the second sliding rail and can reciprocate along the second sliding rail, so as to realize the feeding of the second pole piece, feed the second pole piece from the second pole piece feeding mechanism 3-1 to the second pole piece visual rectification platform 3-3. The second piece feeding manipulator 3-4 also adopts the mode of suction cup to pick up the pole piece. The reciprocating movement of the second piece feeding manipulator 3-4 can be controlled by a conventional driving unit such as a motor, a linear module or an air cylinder.

[0044] As shown in Figure 4 , diaphragm pressing claws 4-1 are arranged on the opposite sides of the piece stacking table 4, the diaphragm pressing claws 4-1 are used to press the diaphragm laid on the piece stacking table 4, fix the diaphragm and keep the diaphragm flat, so as to stack the pole pieces on the diaphragm.

[0045] As shown in Figure 1 and Figure 6 , the diaphragm placing mechanism 5 includes a diaphragm unwinding roller 5-1, diaphragm buffer rollers 5-2 and a diaphragm cutter 5-3. The machine table 1 is provided with a third support 9, the diaphragm unwinding roller 5-1 is arranged on the third support 9, and a plurality of diaphragm buffer rollers 5-2 and a diaphragm cutter 5-3 are further arranged on the third support 9. The diaphragm roll is arranged on the diaphragm unwinding roller 5-1 and is unwound by rotating around its own axis through the diaphragm unwinding roller 5-1, and the unwound diaphragm successively winds around the diaphragm buffer rollers 5-2.

[0046] AsFigure 5 and Figure 6 As shown in FIG. 6, the diaphragm placing mechanism 6 is arranged at the discharge end of the diaphragm placing mechanism 5, and is used to stack the diaphragm in a Z shape on the stacking table 4. The diaphragm placing mechanism 6 of the present embodiment includes a diaphragm pushing part 6-1 and a diaphragm passing roller 6-2 arranged at one end of the diaphragm pushing part 6-1. A pole piece picking part is arranged on the bottom surface of the diaphragm pushing part 6-1. The pole piece picking part of the present embodiment is a vacuum suction cup. The diaphragm pushing part 6-1 of the present embodiment has the functions of pushing the diaphragm, stacking the diaphragm on the stacking table 4, and also has the functions of adsorbing the second pole piece and placing the second pole piece on the stacking table 4, that is, the diaphragm pushing part 6-1 also serves as a second piece placing manipulator. The diaphragm placing mechanism 6 can move the second pole piece to the stacking table 4 while placing the diaphragm, and has two functions, thereby improving the operation efficiency.

[0047] As shown in FIG. 6, the diaphragm placing mechanism 6 is arranged at the discharge end of the diaphragm placing mechanism 5, and is used to stack the diaphragm in a Z shape on the stacking table 4. The diaphragm placing mechanism 6 of the present embodiment includes a diaphragm pushing part 6-1 and a diaphragm passing roller 6-2 arranged at one end of the diaphragm pushing part 6-1. A pole piece picking part is arranged on the bottom surface of the diaphragm pushing part 6-1. The pole piece picking part of the present embodiment is a vacuum suction cup. The diaphragm pushing part 6-1 of the present embodiment has the functions of pushing the diaphragm, stacking the diaphragm on the stacking table 4, and also has the functions of adsorbing the second pole piece and placing the second pole piece on the stacking table 4, that is, the diaphragm pushing part 6-1 also serves as a second piece placing manipulator. The diaphragm placing mechanism 6 can move the second pole piece to the stacking table 4 while placing the diaphragm, and has two functions, thereby improving the operation efficiency. Figure 1 and Figure 5 As shown in FIG. 6, the diaphragm placing mechanism 6 is arranged at the discharge end of the diaphragm placing mechanism 5, and is used to stack the diaphragm in a Z shape on the stacking table 4. The diaphragm placing mechanism 6 of the present embodiment includes a diaphragm pushing part 6-1 and a diaphragm passing roller 6-2 arranged at one end of the diaphragm pushing part 6-1. A pole piece picking part is arranged on the bottom surface of the diaphragm pushing part 6-1. The pole piece picking part of the present embodiment is a vacuum suction cup. The diaphragm pushing part 6-1 of the present embodiment has the functions of pushing the diaphragm, stacking the diaphragm on the stacking table 4, and also has the functions of adsorbing the second pole piece and placing the second pole piece on the stacking table 4, that is, the diaphragm pushing part 6-1 also serves as a second piece placing manipulator. The diaphragm placing mechanism 6 can move the second pole piece to the stacking table 4 while placing the diaphragm, and has two functions, thereby improving the operation efficiency.

[0048] The diaphragm pushing part 6-1 of the present embodiment is located below the diaphragm unwinding roller 5. The free end of the unwound diaphragm is fixed on the stacking table 4. When the diaphragm pushing part 6-1 moves in the first direction, the diaphragm passing roller 6-2 can push the diaphragm to move in the direction close to the stacking table 4, so that the diaphragm is laid on the stacking table 4. The diaphragm pushing part 6-1 of the present embodiment has a plate-shaped structure. For the convenience of description, the end of the diaphragm pushing part 6-1 close to the stacking table 4 is defined as the first end. The diaphragm passing roller 5-4 is arranged at the first end of the diaphragm pushing part 6-1. When the diaphragm pushing part 6-1 pushes the diaphragm to the stacking table 4 in the first direction, the diaphragm passing roller 6-2 is in contact with the diaphragm and moves together with the diaphragm pushing part 6-1.

[0049] In this embodiment, the diaphragm pushing section 6-1 can move along a first direction between a third position (the third position is the sheet picking position, where the diaphragm pushing section picks up the second electrode sheet) and a fourth position (the fourth position is the sheet placement position, where the diaphragm pushing section places the electrode sheet). When the diaphragm pushing section 6-1 is in the third position, the suction cup located at the bottom of the diaphragm pushing section 6-1 picks up the second electrode sheet. In this embodiment, when the diaphragm pushing section 6-1 is in the third position, it is located above the second electrode sheet visual correction platform 3-3, thus allowing it to pick up the second electrode sheet from the second electrode sheet visual correction platform 3-3. When the diaphragm pushing section 6-1 is in the fourth position, it is located above the stacking table 4. At this time, the diaphragm roller 6-2 is located at the position furthest from the diaphragm cutter 5-3, and also the position closest to the second end of the stacking table 4 (the end of the stacking table 4 closest to the diaphragm cutter is defined as the first end, and the end furthest from the diaphragm cutter is defined as the second end). When the stacking table 4 is in the first position, the diaphragm roller 6-2 is located above the second end of the stacking table 4, and at this time, the diaphragm pushing part 6-1 has completed the action of laying a layer of diaphragm on the stacking table 4. When the stacking table 4 is in the second position, the diaphragm pushing part 6-1 retracts to the initial position to facilitate the picking up of the second electrode sheet.

[0050] The method for stacking wafers using the stacking machine of this embodiment will be described below with reference to the accompanying drawings.

[0051] like Figure 6 As shown, after the diaphragm 100 is unwound from the diaphragm unwinding roller 5-1, the diaphragm 100 passes sequentially around each diaphragm buffer roller 5-2, and the free end of the diaphragm 100 is fixed by the diaphragm clamping claw 4-1; at the same time, the first electrode feeding mechanism 2-1 and the second electrode feeding mechanism 3-1 are respectively filled with the first electrode and the second electrode; before the stacking begins, the stacking table 4 is in the second position, at which time the distance between the stacking table 4 and the diaphragm pushing part 6-1 is the largest;

[0052] When the equipment is started, the stacking begins. The first feeding robot 2-4 and the second feeding robot 3-4 pick up the first electrode and the second electrode from the first electrode feeding mechanism 2-1 and the second electrode feeding mechanism 3-1, respectively, and send the first electrode and the second electrode to the first electrode visual correction platform 2-3 and the second electrode visual correction platform 3-3 for visual inspection and correction.

[0053] The qualified first and second electrodes are then respectively transported from the first electrode visual correction platform 2-3 and the second electrode visual correction platform 3-3 to the stacking table 4 by the first electrode placement robot 2-2 and the diaphragm pushing unit 6-1; the diaphragm pushing unit 6-1 transports the second electrode to the stacking table 4 along the first direction; as... Figure 7As shown, when the membrane pushing part 6-1 pushes the membrane 100 along the first direction to move the membrane 100 to the lamination table 4, the lamination table 4 also moves along the first direction to the direction close to the membrane pushing part 6-1, that is, from the second position to the first position;

[0054] When the lamination table 4 moves to the first position (designated position), the movement stops, at this time, the membrane pushing part 6-1 is located at the fourth position, that is, completely above the lamination table 4, and the membrane passing roller 6-2 is farthest away from the membrane cutter 5-3, as shown in Figure 8 and Figure 9 As shown, at this time, the membrane pushing part 6-1 has laid the membrane on the lamination table 4, and the second pole piece moves to the laid membrane interlayer following the membrane pushing part 6-1, the membrane pushing part 6-1 puts down the second pole piece, and the membrane pressing claw 4-1 fixes the membrane and the second pole piece on the lamination table 4, as shown in Figure 10 As shown;

[0055] After the membrane and the second pole piece are fixed, the membrane pushing part 6-1 retreats and resets, and the lamination table 4 also resets in sequence and pushes to the second position; after the membrane pushing part 6-1 and the lamination table 4 reset, as shown in Figure 3 The first pole piece is laid on the membrane by the first pole piece laying manipulator 2-2, and the lamination of one layer of the battery cell is completed; then the above steps are repeated to laminate the next layer of the battery cell.

[0056] In this embodiment, by arranging the membrane passing roller 6-2 at the first end (the end against the membrane) of the membrane pushing part 6-1, the impact on the membrane can be effectively reduced, the friction on the membrane can be reduced, and the membrane can be prevented from being damaged. Optionally, after the membrane pushing part 6-1 resets, the membrane unwinding roller recovers the membrane by a distance (such as 50 mm) by reversing the control motor, so as to eliminate the size occupied by the membrane passing roller.

[0057] From the above action process can be seen, the diaphragm push plate of the diaphragm laying and the second pole piece pickup mechanism are integrated together, the pole piece pickup part is arranged at the bottom of the diaphragm pushing part, the diaphragm pushing part moves to the laminating table with the second pole piece while pushing the diaphragm to lay on the laminating table, when a layer of diaphragm is laid on the laminating table, the second pole piece is also sent to the laminating table synchronously and is clamped between the laid diaphragm layers, one action of the diaphragm pushing part can complete two processes (laying diaphragm and laying second pole piece), the action efficiency is improved, time is saved, after the diaphragm pushing part exits and resets, the first pole piece can be laminated above the laid diaphragm layer, the action is simple and efficient. The laminating machine adopting the diaphragm pushing part does not need to change the existing material structure, does not need to increase new processes and equipment, does not need to increase new equipment cost and material cost, is beneficial to control the overall production cost. In addition, the laminating table can also move along the second direction, when the diaphragm pushing part pushes the diaphragm to the laminating table, the laminating table also moves towards the diaphragm pushing plate, the moving stroke of the diaphragm pushing plate is reduced, the diaphragm laying time is shortened, and the efficiency is more improved.

[0058] The above description of disclosed embodiments enables one skilled in the art to make or use the application. Numerous modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stacking machine, characterized in that, include: A stacking table, which can reciprocate along a first direction, and a diaphragm pressure claw is provided on the side of the stacking table; The first electrode feeding mechanism includes a first electrode delivery robot that delivers the first electrode to the stacking table. The second electrode feeding mechanism includes a second electrode feeding robot that delivers the second electrode to the stacking table. A diaphragm placement mechanism includes a diaphragm pushing part that can reciprocate along a first direction. The bottom surface of the diaphragm pushing part is provided with an electrode picking part. The diaphragm pushing part constitutes a second electrode placement robot. The diaphragm pushing part and the stacking table can move towards each other or away from each other along the first direction. When the diaphragm pushing part moves from the electrode picking position to the electrode placement position along the first direction, the first end of the diaphragm pushing part pushes the diaphragm to move and lays the diaphragm on the stacking table.

2. The stacking machine as described in claim 1, characterized in that: The first end of the diaphragm pushing section is provided with a diaphragm guide roller, which pushes the diaphragm to move.

3. The stacking machine as described in claim 1, characterized in that: The first electrode feeding mechanism further includes a first electrode feeding mechanism, a first electrode feeding robot, a first electrode visual correction platform, and a first visual detection sensor; both the first electrode placement robot and the first electrode feeding robot can reciprocate along a second direction, and the first electrode visual correction platform is disposed between the first electrode feeding robot and the first electrode placement robot. The first electrode feeding robot is used to feed the first electrode from the first electrode feeding mechanism to the first electrode visual correction platform, and the first electrode placement robot is used to feed the first electrode from the first visual correction platform to the stacking table.

4. The stacking machine as described in claim 3, characterized in that: The first visual detection sensor includes five CCD cameras disposed above the first electrode visual correction platform.

5. The stacking machine as described in claim 1, characterized in that: The second electrode feeding mechanism further includes a second electrode feeding mechanism, a second electrode feeding robot, a second electrode visual correction platform, and a second visual detection sensor; the second electrode feeding robot can reciprocate along a second direction, the second electrode visual correction platform is disposed between the second electrode feeding robot and the diaphragm placement mechanism, the second electrode feeding robot is used to feed the second electrode from the second electrode feeding mechanism to the second electrode visual correction platform, and the diaphragm pushing part feeds the second electrode from the second visual correction platform to the stacking table.

6. The stacking machine as described in claim 5, characterized in that: The second visual detection sensor includes five CCD cameras positioned above the second electrode visual correction platform.

7. The stacking machine as described in claim 3 or 5, characterized in that: The second direction is perpendicular to the first direction.

8. The stacking machine as described in claim 1, characterized in that: The diaphragm section can move vertically.

9. The stacking machine as described in claim 1, characterized in that: It also includes a diaphragm unwinding mechanism, which includes a diaphragm unwinding roller, a plurality of diaphragm buffer rollers, and a diaphragm cutter, and the diaphragm placement mechanism is located at the discharge end of the diaphragm unwinding mechanism.

10. A method for stacking wafers using a stacking machine as described in any one of claims 1 to 9, characterized in that, Includes the following steps: After the diaphragm is unwound, the free end of the diaphragm is fixed on the stacking table; The diaphragm pushing section picks up the second electrode and pushes the diaphragm towards the stacking stage along the first direction. The stacking stage also moves towards the diaphragm pushing section along the first direction. When the stacking table moves to the first position, it stops. At this time, the diaphragm pushing part moves above the stacking table and lays the diaphragm on the stacking table. The second electrode is sent by the diaphragm pushing part to the space between the laid diaphragm layers. The diaphragm pushing part puts down the second electrode. The diaphragm pressing claws fix the diaphragm and the second electrode on the stacking table. The diaphragm pusher retracts and resets, and the stacking stage also retracts and resets; The stacking platform is reset to the second position, the first electrode placement robot places the first electrode on the diaphragm, and the diaphragm clamping claw fixes the diaphragm and the first electrode on the stacking platform to complete the stacking of one layer of battery cells; The diaphragm is reset to the pick-up position to pick up the second electrode, and the aforementioned steps are repeated to stack the next layer of cells.

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