A stacking device and battery cell production line

Abstract

The present application provides a stacking device, including: a stacking platform assembly; a first material-retrieving station and a second material-retrieving station, respectively located on both sides of the stacking platform assembly; a stacking platform assembly, which is rotatably provided with a plurality of transfer parts, and can alternately transfer the pole pieces of the first material-retrieving station and the second material-retrieving station to the stacking platform assembly; wherein the extension direction of the transfer part and the rotation path meet the tangent condition, so that the extension direction of the pole piece on the transfer part and the rotation path of the transfer part meet the tangent condition. With such an arrangement, through the design of the transfer part of the stacking platform assembly, the transfer part drives the pole piece to form a small rotation radius, which is conducive to saving space and controlling energy consumption when stacking long strip pole pieces.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell preparation, and in particular to a stacking device and a battery cell production line. Background Art

[0002] In the lithium battery manufacturing process, stacking cells is a very important cell manufacturing process. During the cell preparation process, positive and negative electrodes need to be stacked alternately, and a diaphragm is required to separate the positive and negative electrodes.

[0003] The lamination device in the prior art has two stacking platform assemblies, a first material picking station, a second material picking station and a lamination assembly. The first material picking station and the second material picking station are adjacent to the lamination assembly respectively. The lamination assembly is rotatably arranged on a frame and has four manipulators distributed along the circumference. Through the rotation of the lamination assembly, the multiple manipulators are respectively rotated to the top of the first material picking station, the top of the second material picking station and the top of the lamination assembly, so that materials can be picked up at the first material picking station and the second material picking station while materials are placed on the two stacking platform assemblies. However, since the lamination is performed by rotating the lamination assembly, when the pole piece is in a long strip shape, the rotation radius formed by the pole piece driven by the lamination assembly is large, resulting in a large occupied space and a large rotation inertia, which is not conducive to saving space and controlling energy consumption. Summary of the invention

[0004] In view of this, the present application provides a stacking device battery cell production line, which can stack long strip pole pieces, which is conducive to saving space and controlling energy consumption.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A lamination device, comprising:

[0007] Stacking components;

[0008] A first material taking station and a second material taking station are respectively located on two sides of the stacking platform assembly;

[0009] A stacking assembly is rotatably provided with a plurality of transfer parts, and is capable of alternately transferring the pole pieces of the first material taking station and the second material taking station to the stacking assembly;

[0010] Among them, the extension direction of the transfer part and the rotation path meet the tangency condition, so that the extension direction of the upper pole piece of the transfer part and the rotation path of the transfer part meet the tangency condition.

[0011] Optionally, the plurality of transfer parts include a first transfer part rotating along a first arc-shaped trajectory and a second transfer part rotating along a second arc-shaped trajectory, the first arc-shaped trajectory and the second arc-shaped trajectory are coaxial, and the radius of the first arc-shaped trajectory is greater than the radius of the second arc-shaped trajectory;

[0012] The stacking assembly includes a stacking station capable of switching between a first arc track and a second arc track and a diaphragm conveying line located between the first arc track and the second arc track;

[0013] Wherein, the first material picking station is located on the first arc track, and the second material picking station is located on the second arc track.

[0014] Optionally, the radius difference between the first arc-shaped trajectory and the second arc-shaped trajectory is greater than the width of the pole piece.

[0015] Optionally, the stacking assembly is provided with an avoidance position, which is located between the first arc-shaped trajectory and the second arc-shaped trajectory and can allow the diaphragm conveying line to pass when the first transfer part displaces along the first arc-shaped trajectory or the second transfer part displaces along the second arc-shaped trajectory.

[0016] Optionally, the lamination assembly is provided with a turntable, and the first transfer part and the second transfer part are both arranged on the periphery of the turntable and rotate with the turntable.

[0017] Optionally, the adjacent ends of two adjacent first transfer parts are connected to the turntable via a support rod to form the avoidance position between the first transfer part and the turntable.

[0018] Optionally, the number of the stacking platform assemblies is twice the number of the first material picking station or the second material picking station, and each of the stacking platform assemblies is located between the adjacent first material picking station and the second material picking station, and the number of the transfer parts is the sum of the number of the stacking platform assemblies, the first material picking station and the second material picking station, so that the multiple transfer parts can alternately transfer the pole pieces of the first material picking station and the second material picking station to each of the stacking platform assemblies.

[0019] Optionally, two stacking stage assemblies are provided.

[0020] Optionally include:

[0021] A first deviation-correcting component is provided with the first material-retrieving station;

[0022] The second deviation-correcting component is provided with the second material-retrieving station.

[0023] A battery cell production line comprises a lamination device, wherein the lamination device is the lamination device as described in any one of the above items.

[0024] In the lamination device provided by the present application, the transfer part of the lamination assembly is set to be long strip, and the extension direction of the transfer part and the rotation path of the transfer part meet the tangent condition, that is, the extension direction of the transfer part meets the vertical condition relative to the line connecting the transfer part and its rotation center. When the transfer part grabs the long strip pole piece, the extension direction of the pole piece is consistent with the extension direction of the transfer part, so that the extension direction of the pole piece grabbed on the transfer part and the rotation path of the rotating part meet the tangent condition, that is, the extension direction of the pole piece and the rotation path of the pole piece meet the tangent condition. In this way, when the lamination assembly transfers the pole piece, the rotation radius formed by the transfer part driving the pole piece is small, which can reduce the space occupied by the rotation, and the rotation inertia is small, which is convenient for controlling the start and stop of the transfer, and reducing the motion energy consumption of the lamination assembly. In this way, through the design of the transfer part of the lamination assembly, the rotation radius formed by the transfer part driving the pole piece is small, which is conducive to saving space and controlling energy consumption when laminating the long strip pole piece.

[0025] Furthermore, during the lamination process, the first transfer part and the second transfer part are displaced along the first arc track and the second arc track respectively. Since the first arc track and the second arc track are coaxial and have different radii, the motion tracks of the first transfer part and the second transfer part do not overlap, ensuring that the positive electrode sheet and the negative electrode sheet do not interfere with each other when placing the material on the stacking assembly, which is beneficial to improving the stability of the transfer. Moreover, the extension direction of the first transfer part satisfies the tangent condition with the first arc track, and the extension direction of the second transfer part satisfies the tangent condition with the second arc track, so that when grabbing the electrode sheet, the width direction of the electrode sheet is in the radial direction of the first arc track and the second arc track, which is beneficial to reducing the radius difference and radius of the first arc track and the second arc track, thereby making the rotation radius formed by the electrode sheet small, which is beneficial to saving space and improving the transfer efficiency. By switching the stacking station between the first arc track and the second arc track, the discharge switching of the positive and negative electrode sheets is realized to form alternating discharge of the positive and negative electrode sheets, and the position of the diaphragm conveying line is fixed between the first arc track and the second arc track, which can ensure a better diaphragm conveying effect. The diaphragm on the diaphragm conveying line is pulled under the drive of the displacement of the stacking station. The pulling direction of the diaphragm conveying line by the stacking station is tangent to the feeding direction of the electrode sheet, which is conducive to Z-shaped stacking of the diaphragm in the width direction of the electrode sheet, is more suitable for the processing and preparation of long strip electrode sheets, and is conducive to improving the tightness of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A top view of a lamination assembly is shown for some embodiments;

[0028] Figure 2 A top view of a lamination device in a first state is shown for some embodiments;

[0029] Figure 3 A side view of a lamination device in a first state is shown for some embodiments;

[0030] Figure 4 A top view of a lamination device in a second state is shown for some embodiments;

[0031] Figure 5 A side view of a lamination assembly in a second state is shown for some embodiments.

[0032] In the figure: 1. First transfer section; 2. Second transfer section; 3. Stacking station; 4. Diaphragm conveying line; 5. Turntable; 6. Support rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] like Figure 1-Figure 5 As shown, an embodiment of the present application provides a lamination device, including a lamination stage assembly, a first material retrieving station, a second material retrieving station and a lamination stage assembly, wherein the first material retrieving station and the second material retrieving station are material retrieving stations for positive electrode sheets and negative electrode sheets, respectively, and the lamination stage assembly is used to transfer the positive electrode sheets and negative electrode sheets on the first material retrieving station and the second material retrieving station to the lamination stage assembly, respectively, so as to alternately stack the positive electrode sheets and the negative electrode sheets on the lamination stage assembly, and at the same time, lay a diaphragm between the positive electrode sheets and the negative electrode sheets through the lamination stage assembly, thereby completing the lamination process. When in use, the conveying assembly conveys the positive electrode sheets and the negative electrode sheets to the first material retrieving station and the second material retrieving station, respectively, so as to facilitate the lamination stage assembly to retrieve materials.

[0035] The first material retrieving station and the second material retrieving station are respectively located on both sides of the stacking assembly to reduce the transfer stroke of the electrode sheet, which is conducive to improving the transfer efficiency. Specifically, the first material retrieving station can be provided with a positive electrode sheet and the second material retrieving station can be provided with a negative electrode sheet, or the first material retrieving station can be provided with a negative electrode sheet and the second material retrieving station can be provided with a positive electrode sheet.

[0036] The stacking assembly is rotatably provided with a plurality of transfer parts, and the transfer parts can be switched between the first material taking station and the stacking assembly or between the second material taking station and the stacking assembly by rotating the transfer parts along the rotation center, so as to alternately transfer the pole pieces of the first material taking station and the second material taking station to the stacking assembly. For example, two transfer parts are provided, and when one of the transfer parts is opposite to the stacking assembly and discharges the material, the other is opposite to the first material taking station or the second material taking station and takes the material, so as to avoid the transfer part being empty.

[0037] The transfer part of the stacking assembly is set to be long and narrow, and the extension direction of the transfer part and the rotation path of the transfer part meet the tangent condition, that is, the extension direction of the transfer part meets the vertical condition relative to the line connecting the transfer part and its rotation center. When the transfer part grabs the long strip pole piece, the extension direction of the pole piece is consistent with the extension direction of the transfer part, so that the extension direction of the pole piece grabbed on the transfer part meets the tangent condition with the rotation path of the rotating part, that is, the extension direction of the pole piece meets the tangent condition with the rotation path of the pole piece. In this way, when the stacking assembly transfers the pole piece, the transfer part drives the pole piece to form a smaller rotation radius, which can reduce the space occupied by the rotation, and the rotational inertia is small, which is convenient for controlling the start and stop of the transfer and reducing the motion energy consumption of the stacking assembly.

[0038] It should be noted that the above-mentioned "tangent condition" is a state close to tangency, and the above-mentioned "vertical condition" is a state close to verticality, so that the extension direction of the transfer part is close to vertical relative to the line connecting the transfer part and its rotation center, and the angle can be specifically 85-95 degrees.

[0039] With such arrangement, through the design of the transfer part of the stacking assembly, the transfer part drives the pole pieces to form a small rotation radius, which is beneficial to saving space and controlling energy consumption when stacking long strip pole pieces.

[0040] In this solution, the multiple transfer parts include a first transfer part 1 and a second transfer part 2, that is, a part of the multiple transfer parts is the first transfer part 1, and the other part is the second transfer part 2. The first transfer part 1 rotates along a first arc track, and the second transfer part 2 rotates along a second arc track. The rotation center of the first transfer part 1 and the rotation center of the second transfer part 2 are located on the same straight line, that is, the first arc track and the second arc track are coaxial, and the radius of the first arc track is greater than the radius of the second arc track, so that a gap is formed between the first arc track and the second arc track.

[0041] The stacking assembly includes a stacking station 3 and a diaphragm conveyor line 4, wherein the stacking station 3 can switch between a first arc trajectory and a second arc trajectory, when the stacking station 3 is on the first arc trajectory, the first transfer part 1 can discharge materials on the stacking station 3, and when the stacking station 3 is on the second arc trajectory, the second transfer part 2 can discharge materials on the stacking station 3, and then by switching the position of the stacking station 3, the discharge switching of the positive and negative electrode sheets is realized to form alternating discharge of the positive and negative electrode sheets; the diaphragm conveyor line 4 is located between the first arc trajectory and the second arc trajectory, when the stacking station 3 completes the discharge on the first arc trajectory, the stacking station 3 is displaced from the first arc trajectory to the second arc trajectory, and the diaphragm on the diaphragm conveyor line 4 is driven by the displacement of the stacking station 3, so that the diaphragm is laid on the topmost electrode sheet on the stacking station 3, so that the electrode sheet when discharging again is separated from the electrode sheet when discharging last time by the diaphragm.

[0042] The first material picking station is located on the first arc trajectory, so that the first transfer part 1 can transfer the pole piece of the first material picking station to the stacking station 3 on the first arc trajectory, and the second material picking station is located on the second arc trajectory, so that the second transfer part 2 can transfer the pole piece of the second material picking station to the stacking station 3 on the second arc trajectory.

[0043] During the stacking process, the first transfer part and the second transfer part are displaced along the first arc track and the second arc track respectively. Since the first arc track and the second arc track are coaxial and have different radii, the movement trajectories of the first transfer part and the second transfer part do not overlap, ensuring that the positive electrode sheet and the negative electrode sheet do not interfere with each other when placing the material on the stacking assembly, which is beneficial to improving the stability of the transfer. Moreover, the extension direction of the first transfer part meets the tangent condition with the first arc track, and the extension direction of the second transfer part meets the tangent condition with the second arc track, so that when grabbing the electrode sheet, the width direction of the electrode sheet is in the radial direction of the first arc track and the second arc track, which is beneficial to reduce the radius difference and radius of the first arc track and the second arc track, thereby making the rotation radius formed by the electrode sheet small, which is beneficial to saving space and improving the transfer efficiency.

[0044] In this way, the discharge switching of the positive and negative electrode sheets is realized by switching the stacking station 3 between the first arc trajectory and the second arc trajectory, so as to form alternating discharge of the positive and negative electrode sheets, and the position of the diaphragm conveyor line 4 is fixed between the first arc trajectory and the second arc trajectory, which can ensure a better diaphragm conveying effect. The diaphragm on the diaphragm conveyor line 4 is pulled under the drive of the displacement of the stacking station 3. The pulling direction of the diaphragm conveyor line by the stacking station is tangent to the feeding direction of the electrode sheet, which is conducive to Z-shaped stacking of the diaphragm in the width direction of the electrode sheet, is more suitable for the processing and preparation of long strip electrode sheets, and is conducive to improving the tightness of the diaphragm.

[0045] Specifically, the stacking assembly includes a bracket and a diaphragm unwinding mechanism, and the stacking station 3 is slidably arranged on the bracket to achieve switching between a first arc track and a second arc track; the diaphragm unwinding mechanism is used to convey the diaphragm to form a diaphragm conveying line 4.

[0046] Of course, in other schemes, the radius of the first arc trajectory and the second arc trajectory are the same, and the first material picking station, the second material picking station and the stacking station are all located on the first arc trajectory and the second arc trajectory. At this time, the stacking station 3 can be fixed to the bracket, and the diaphragm winding of the electrode is achieved through the displacement switching of the diaphragm unwinding mechanism relative to the bracket.

[0047] Among them, the radius difference between the first arc trajectory and the second arc trajectory is greater than the width of the pole piece, so that the diaphragm conveying line 4 can be set between the first arc trajectory to ensure stable diaphragm conveying, and to leave a displacement margin for the stacking station 3 to ensure the stacking integrity of the diaphragm of the pole piece on the stacking station 3.

[0048] In some embodiments, a avoidance position is provided on the stacking assembly, and the avoidance position is located between the first arc track and the second arc track, and can allow the diaphragm conveying line to pass when the first transfer part is displaced along the first arc track or the second transfer part is displaced along the second arc track. Specifically, the avoidance position can be set on the side of the first transfer part close to the rotation center, so that when the stacking assembly drives the first transfer part to displace along the first arc track, the structure on the stacking assembly connected to the first transfer part will not interfere with the diaphragm conveying line; of course, the avoidance position can also be set on the side of the second transfer part away from the rotation center, so that when the stacking assembly drives the second transfer part to displace along the second arc track, the structure on the stacking assembly connected to the second transfer part will not interfere with the diaphragm conveying line. In this way, the avoidance position can avoid obstructing the conveying of the diaphragm during the displacement of the stacking assembly.

[0049] like Figure 1 As shown, the lamination assembly includes a turntable 5, and the first transfer part 1 and the second transfer part 2 are both arranged on the outer periphery of the turntable 5, and the rotation of the turntable 5 can drive multiple transfer parts (the first transfer part 1 and the second transfer part 2) to rotate and lift. Since the turntable 5 is close to the rotation center of the multiple transfer parts (the first transfer part 1 and the second transfer part 2) relative to the multiple transfer parts (the first transfer part 1 and the second transfer part 2), the lamination assembly can have a smaller occupied space, which is convenient for saving processing space.

[0050] Furthermore, the avoidance position is arranged between the first transfer part 1 and the turntable 5, and can allow the diaphragm conveyor line 4 to pass when the first transfer part 1 is displaced along the first arc trajectory. When the first transfer part 1 is displaced between the first material picking station and the stacking station, the diaphragm conveyor line 4 can be displaced along the avoidance position relative to the first transfer part 1, so that when the first transfer part 1 is displaced to any position between the first material picking station and the stacking station, the avoidance position can allow the diaphragm conveyor line 4 to pass, thereby avoiding obstruction of the diaphragm transportation during the displacement of the stacking assembly.

[0051] Specifically, the adjacent ends of two adjacent first transfer parts 1 are connected to the turntable 5 through the support rod 6 to form an avoidance position between the first transfer part 1 and the turntable 5. Here, the adjacent ends of two adjacent first transfer parts 1 are connected together by a connecting rod, and the connecting rod is connected to the turntable 5 through the support rod 6, thereby realizing the connection and fixation between the first transfer part 1 and the turntable 5. The structure is simple, convenient and reliable.

[0052] In this solution, the number of stacking assemblies is twice the number of the first material picking station or the second material picking station, and each stacking assemblies is located between the adjacent first material picking station and the second material picking station, and the number of transfer parts is the sum of the number of stacking assemblies, the first material picking station and the second material picking station, so that multiple transfer parts can alternately transfer the pole pieces of the first material picking station and the second material picking station to each stacking assemblies.

[0053] The stacking platform assembly can be set to at least two. Here, four transfer parts, two stacking platform assemblies, a first material picking station and a second material picking station are used as examples for explanation. The first material picking station and the second material picking station are respectively set to one, and four transfer parts are provided (the first transfer part 1 and the second transfer part 2 are respectively provided with two), so that the preset angle of rotation of the multiple transfer parts is 90 degrees. When the multiple transfer parts rotate 90 degrees forward or 90 degrees reverse, the two stacking platform assemblies can be used to stack positive and negative sheets at the same time, thereby improving the stacking efficiency. Among them, the two stacking station groups of the two stacking platform assemblies are symmetrically arranged with respect to the rotation center of the stacking assembly, and the first material picking station and the second material picking station respectively form an angle of 90 degrees with the two stacking platform assemblies relative to the rotation center, so that the positive and negative sheets can be loaded from opposite sides. The forward rotation and reverse rotation here are counterclockwise rotation and clockwise rotation.

[0054] The number of stacking assemblies may be 2, 4, 6, 2N, where N=1, 2, 3, 4, and other positive integers. For example, when the number of stacking assemblies is four, the number of first material-retrieving stations is two, the number of second material-retrieving stations is two, and the preset rotation angle of the multiple transfer parts is 45 degrees. When the multiple transfer parts rotate 45 degrees forward or 45 degrees backward, the four stacking assemblies can be stacked with positive and negative electrode sheets at the same time, thereby further improving the stacking efficiency.

[0055] It can be seen that for each additional set of the first material reclaiming station and the second material reclaiming station, two stacking assemblies can be added accordingly, and the number of stacking assemblies is an even number, and the first material reclaiming station and the second material reclaiming station are alternately arranged between two adjacent stacking assemblies. When the number of sets of the first material reclaiming station and the second material reclaiming station is more, the number of stacking assemblies required is also more, and the efficiency of lamination is also higher.

[0056] Specifically, in the present solution, there are two stacking stage assemblies, two first transfer parts 1 and two second transfer parts 2, and one first material picking station and one second transfer part 2. In this way, a larger space can be reserved in the circumferential direction of the multiple transfer parts (the first transfer part 1 and the second transfer part 2) to facilitate the stacking processing of pole pieces with a relatively large length and width (such as a short knife with a length of 500 mm and a width of 100 mm).

[0057] Here, the transfer part includes a vacuum adsorption plate, and the positive electrode sheet or the negative electrode sheet is adsorbed by the vacuum adsorption plate, so that the taking and placing of the positive electrode sheet and the negative electrode sheet can be better controlled.

[0058] The stacking device further comprises a first deflection correction component and a second deflection correction component. The first deflection correction component and the second deflection correction component are used to correct the positive electrode sheet and the negative electrode sheet respectively, so that the positive electrode sheet and the negative electrode sheet at the first material picking station and the second material picking station are in an accurate posture, so as to be directly grabbed by the transfer part, thereby ensuring the efficiency of stacking.

[0059] Specifically, the first correcting assembly and the second correcting assembly are respectively arranged downstream of the conveying assembly for conveying the positive electrode sheet and the negative electrode sheet, so as to correct the posture of the positive and negative electrode sheets conveyed to the first material taking station and the second material taking station.

[0060] The present lamination device will be described in detail below in conjunction with the preferred solutions of the above embodiments.

[0061] like Figure 2-5 As shown, the stacking assembly includes two first transfer parts 1 (A and B) and two second transfer parts 2 (C and D), two stacking stations 3 are located at the upper and lower transfer parts, the first material taking station and the second material taking station are located at the left and right transfer parts, and the first material taking station and the second material taking station are used to provide negative electrode sheets and positive electrode sheets respectively. The specific steps of the stacking device during operation are as follows:

[0062] Step 1: If Figure 2 As shown, the two stacking stations 3 are in the overlapping position of the transfer parts B and D, that is, the upper stacking station 3 is on the second arc trajectory, and the lower stacking station 3 is on the first arc trajectory. At this time, the transfer part A grabs a negative electrode sheet from the first material picking station, and the transfer part C is empty.

[0063] Step 2: The four transfer parts A, B, C, and D rotate 90 degrees clockwise at the same time, and the two stacking stations 3 move upward to Figure 2 In the dotted box, the status of each component after the action is completed is as follows Figure 4 shown.

[0064] Step 3: The transfer unit A places the grabbed negative electrode sheet on the stacking station 3, and the transfer units B and D grab a negative electrode sheet and a positive electrode sheet from the first material picking station and the second material picking station respectively.

[0065] Step 4: The four transfer parts A, B, C, and D rotate 90 degrees counterclockwise at the same time, and the two stacking stations 3 move downward to Figure 4 In the dotted box, the status of each component after the action is completed is as follows Figure 2 shown.

[0066] Step 5: The transfer unit D places the positive electrode sheet on the upper stacking station 3, the transfer unit B places the negative electrode sheet on the lower stacking station 3, and the transfer units A and C take the negative electrode sheet and the positive electrode sheet respectively.

[0067] Step 6: The four transfer parts A, B, C, and D rotate 90° clockwise at the same time, and the two stacking stations 3 move upward to Figure 2 In the dotted box, the status of each component after the action is completed is as follows Figure 4 shown.

[0068] Step 7: The transfer unit C places the positive electrode sheet on the stacking station 3 below, the transfer unit A places the negative electrode sheet on the stacking station 3 above, and the transfer units B and D take the negative electrode sheet and the positive electrode sheet respectively.

[0069] Repeat steps five to seven, and repeat this process repeatedly to achieve the simultaneous stacking of positive and negative electrodes on the stacking table.

[0070] The embodiment of the present application provides a battery cell production line, including a lamination device, which is the lamination device in the above embodiment. With such a configuration, through the design of the transfer part of the lamination assembly, the transfer part drives the pole piece to form a small rotation radius, which is beneficial to saving space and controlling energy consumption when laminating the long strip pole piece.

[0071] In addition, for other beneficial effects brought about by the battery cell production line, please refer to the above description of the stacking device, which will not be repeated here.

[0072] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0073] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0074] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0075] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0076] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0077] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A lamination device, characterized in that: include: Stacking components; A first material taking station and a second material taking station are respectively located on two sides of the stacking platform assembly; A stacking assembly is rotatably provided with a plurality of transfer parts, and is capable of alternately transferring the pole pieces of the first material taking station and the second material taking station to the stacking assembly; Wherein, the extension direction of the transfer part and the rotation path meet the tangent condition, so that the extension direction of the upper pole piece of the transfer part and the rotation path of the transfer part meet the tangent condition; The multiple transfer parts include a first transfer part rotating along a first arc trajectory and a second transfer part rotating along a second arc trajectory, the first arc trajectory and the second arc trajectory are coaxial, and the radius of the first arc trajectory is greater than the radius of the second arc trajectory; the stacking stage assembly includes a stacking stage station capable of switching between the first arc trajectory and the second arc trajectory and a diaphragm conveying line located between the first arc trajectory and the second arc trajectory; the first material picking station is located on the first arc trajectory, and the second material picking station is located on the second arc trajectory.

2. The lamination device according to claim 1, characterized in that: The difference between the radii of the first arc-shaped trajectory and the second arc-shaped trajectory is greater than the width of the pole piece.

3. The lamination device according to claim 1, characterized in that: The stacking assembly is provided with an avoidance position, which is located between the first arc-shaped trajectory and the second arc-shaped trajectory and can allow the diaphragm conveying line to pass when the first transfer part displaces along the first arc-shaped trajectory or the second transfer part displaces along the second arc-shaped trajectory.

4. The lamination device according to claim 3, characterized in that: The lamination assembly is provided with a turntable, and the first transfer part and the second transfer part are both arranged at the periphery of the turntable and rotate with the turntable.

5. The lamination device according to claim 4, characterized in that: One end of two adjacent first transfer parts that are close to each other is connected to the turntable through a support rod to form the avoidance position between the first transfer parts and the turntable.

6. The lamination device according to claim 1, characterized in that: The number of the stacking platform assemblies is twice the number of the first material picking station or the second material picking station, and each of the stacking platform assemblies is located between the adjacent first material picking station and the second material picking station. The number of the transfer parts is the sum of the number of the stacking platform assemblies, the first material picking station and the second material picking station, so that the multiple transfer parts can alternately transfer the pole pieces of the first material picking station and the second material picking station to each of the stacking platform assemblies.

7. The lamination device according to claim 6, characterized in that: The stacking platform components are provided with two.

8. The lamination device according to claim 1, characterized in that: include: A first deviation-correcting component is provided with the first material-retrieving station; The second deviation-correcting component is provided with the second material-retrieving station.

9. A battery cell production line, characterized in that: It comprises a lamination device, and the lamination device is the lamination device as described in any one of claims 1-8.

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