Laminating table and laminating machine

Abstract

The utility model belongs to the technical field of lithium battery production, and discloses a stacking table and a laminating machine, the stacking table comprises a laminating table and a pressing knife mechanism, the laminating table is used for stacking pole pieces with tabs, and the laminating table is provided with a first placing area for placing the pole pieces and a second placing area for placing the tabs; the pressing knife mechanism is arranged corresponding to each second placing area, the pressing knife mechanism comprises a first pressing knife assembly and a second pressing knife assembly, and the first pressing knife assembly and the second pressing knife assembly can alternately abut against and position the pole lug and the pole piece which are stacked on the topmost layer of the lamination table. According to the lamination table disclosed by the utility model, the first pressing knife assembly and the second pressing knife assembly are used for alternately pressing and positioning the pole piece on the topmost layer and the pole lug on the pole piece, and preparation is made in advance in the alternate working process of the first pressing knife assembly and the second pressing knife assembly, so that the lamination speed is accelerated; in addition, the first pressing knife assembly and the second pressing knife assembly abut against and position the pole piece and the pole lug on the pole piece at the same time when working respectively, so that the pole lug is not prone to being turned over, and the lamination quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a stacking table and a laminator. Background Art

[0002] A laminator is a key device for laminating lithium battery cells. Laminating refers to cutting the positive and negative plates into appropriate sizes and laminating them together with an isolation film to form the core of a lithium battery. The current laminating operation is carried out on a stacking table. To prevent situations such as the warping of the plates, the collapse of the plate group, and the movement of the plates during the laminating process, after the manipulator places the plates one by one on the top of the stacking table, the pressing knife presses down on the topmost plate in sequence to press and position the laminated plates.

[0003] When the manipulator stacks the plates on the stacking table, the pressing knife needs to switch from the bottom of the topmost plate to the top of the topmost plate to press and position the topmost plate. During this process, the pressing knife needs to first move away from the stacking table to withdraw from the bottom of the plate, then move upward to a position higher than the topmost plate, and then the pressing knife approaches the stacking table and moves downward until it presses the topmost plate.

[0004] Currently, there are many actions during the switching of the pressing knife. The manipulator needs to wait for the pressing knife to switch positions and press the topmost plate before it can continue to grasp the plates, thus affecting the laminating efficiency. In addition, due to reasons such as large product static electricity or untimely vacuum breakage of the suction cup of the manipulator, the ear tab is easily lifted when the manipulator lifts, causing the ear tab to fold, resulting in a short circuit of the plate group. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a stacking table and a laminator to improve the switching efficiency of the pressing knife, while improving the positioning effect of the plates and preventing the folding of the ear tabs.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A stacking table, which includes a laminating table and a pressing knife mechanism. The laminating table is used for stacking plates with ear tabs. A first placement area for placing the plates and a second placement area for placing the ear tabs are provided on the laminating table.

[0008] One pressing knife mechanism is provided corresponding to each second placement area. The pressing knife mechanism includes a first pressing knife assembly and a second pressing knife assembly. The first pressing knife assembly and the second pressing knife assembly can alternately press and position the topmost plate stacked on the laminating table and the ear tab on the plate.

[0009] Preferably, the upper surface of the body of the stacking table forms the first placement area, and convex platforms are provided on both opposite sides of the upper surface of the stacking table, and the upper surfaces of the convex platforms form the second placement area.

[0010] Preferably, the first pressing knife assembly includes:

[0011] A first pressing knife holder that can move in a first direction parallel to the surface of the pole piece and in a second direction perpendicular to the thickness direction of the pole piece; and

[0012] A first pressing knife, the first pressing knife is connected to the first pressing knife holder, a plurality of the first pressing knives are provided, at least one of the first pressing knives can press and position the pole piece, and at least one of the first pressing knives can press and position the pole ear.

[0013] Preferably, the first pressing knife assembly further includes:

[0014] A sliding seat that is slidably connected to the stacking table and moves along the first direction; and

[0015] A first driving member, the first driving member is connected to the sliding seat, the first pressing knife holder is connected to the first driving member, and the first driving member can drive the first pressing knife holder to move along the second direction.

[0016] Preferably, the first pressing knife holder includes:

[0017] A first fixing member, one first fixing member is provided corresponding to each of the first pressing knives, and the first pressing knife is connected to the first fixing member, and

[0018] A first connecting member that is connected between two adjacent first fixing members.

[0019] Preferably, the second pressing knife assembly includes:

[0020] A second pressing knife holder that is located on one side of the first pressing knife holder and can move relative to the first pressing knife holder in the first direction and the second direction; and

[0021] A second pressing knife, the second pressing knife is connected to the second pressing knife holder, a plurality of the second pressing knives are provided, at least one of the second pressing knives can press down the pole piece, and at least one of the second pressing knives can press down the pole ear.

[0022] Preferably, the second pressing knife holder includes:

[0023] A second fixing member, one second fixing member is provided corresponding to each of the second pressing blades, the second pressing blade is connected to the second fixing member, and the plurality of second fixing members and the plurality of first fixing members are staggered in a third direction perpendicular to the first direction and the second direction, and

[0024] A second connecting member, the second connecting member is connected between two adjacent second fixing members, the second connecting member is located at an end of the second fixing member away from the second pressing blade, and there is a gap between the second connecting member and the first connecting member in the first direction, and there is a gap between the second connecting member and the first pressing blade in the second direction.

[0025] Preferably, the stacking table further includes a driving mechanism, the driving mechanism includes a first driving component and a second driving component, the first pressing blade assembly is connected to the first driving component, and the first driving component can drive the first pressing blade assembly to move in a direction perpendicular to the thickness direction of the pole piece, the second pressing blade assembly is connected to the second driving component, and the second driving component can drive the second pressing blade assembly to move in a direction perpendicular to the thickness direction of the pole piece.

[0026] Preferably, the first driving component includes:

[0027] A driving frame, all the first pressing blade assemblies are connected to the driving frame; and

[0028] A second driving member, the second driving member is connected to the driving frame, and the second driving member can drive the driving frame to move in a direction perpendicular to the thickness direction of the pole piece.

[0029] A laminator, the laminator includes a film covering mechanism, a first material taking mechanism and a second material taking mechanism, and is characterized in that the laminator further includes a stacking table, the first material taking mechanism and the second material taking mechanism can alternately grab the pole pieces and place them on the stacking table, and the film covering mechanism can cover the surface of the pole pieces with a film.

[0030] Advantages of the present utility model:

[0031] For the stacked platform of the present utility model, during the process of stacking sheets, the electrode plates are located in the first placement area, and the electrode tabs are located in the second placement area. By alternately pressing and positioning the topmost electrode plates and electrode tabs using the first pressing knife assembly and the second pressing knife assembly, it is possible to prepare in advance for pressing the electrode plates and electrode tabs during the alternating operation of the first pressing knife assembly and the second pressing knife assembly, thereby reducing the waiting time of the manipulator and accelerating the stacking speed. In addition, when the first pressing knife assembly and the second pressing knife assembly are working respectively, they can simultaneously press the electrode plates and electrode tabs, which can prevent the electrode tabs from being lifted when the manipulator is lifted, so that the electrode tabs are not easily folded, improving the quality of the stacked sheets, and ultimately achieving a double improvement in the stacking efficiency and the stacking quality. Brief Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the stacker of the present utility model;

[0033] Figure 2 is a schematic structural diagram of the stacked platform of the present utility model;

[0034] Figure 3 is a schematic structural diagram of the first pressing knife holder and the second pressing knife holder of the present utility model.

[0035] In the figure:

[0036] 100, electrode plate; 200, electrode tab; 1, stacking table; 11, convex platform; 12, first placement area; 13, second placement area; 2, first pressing knife assembly; 21, first pressing knife holder; 211, first fixing member; 212, first connecting member; 213, connecting portion; 214, connecting rod; 22, first pressing knife; 23, sliding seat; 24, first driving member; 3, second pressing knife assembly; 31, second pressing knife holder; 311, second fixing member; 312, second connecting member; 32, second pressing knife; 4, first driving assembly; 41, driving frame; 42, second driving member; 5, second driving assembly; 6, film covering mechanism; 7, first material taking mechanism; 8, second material taking mechanism; 9, bottom frame; 91, first placement table; 92, support frame; 93, second placement table. Detailed Description of the Preferred Embodiment

[0037] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0038] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the" second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] The following refers to Figures 1 to 3 to illustrate the stacked table and the stacking machine provided by the present utility model. Referring to Figure 1 , the stacking machine includes a film covering mechanism 6, a first material taking mechanism 7, a second material taking mechanism 8, a chassis 9, and a stacked table. The film covering mechanism 6, the first material taking mechanism 7, the second material taking mechanism 8, and the stacked table are all arranged on the chassis 9. The film covering mechanism 6 is located above the stacked table. The chassis 9 is provided with a first placement table 91 and a second placement table 93. The stacked table is located between the first placement table 91 and the second placement table 93. The first material taking mechanism 7 is located above the first placement table 91, and the second material taking mechanism 8 is located above the second placement table 93.

[0042] The first placement table 91 and the second placement table 93 are both horizontally arranged. The first placement table 91 is used to place the positive electrode tab 100, and the second placement table 93 is used to place the negative electrode tab 100. Both the first placement table 91 and the second placement table 93 can correct the deviation and position the tab 100. Specifically, deviation correction mechanisms are provided on both the first placement table 91 and the second placement table 93. The deviation correction mechanism is any one of the existing technologies that can correct the deviation and position the tab 100. Its specific structure is the existing technology and will not be elaborated here.

[0043] The film laminating mechanism 6 in this embodiment is any one of the existing technologies that can laminate the tab 100. Its specific structure is the existing technology and will not be elaborated here. The first material taking mechanism 7 and the second material taking mechanism 8 in this embodiment are any one of the existing technologies of a manipulator or a moving module, which can grab the tabs 100 one by one and stack the tabs 100 above the stacking table. In this embodiment, a two-axis manipulator is taken as an example. The two-axis manipulator can imitate some action functions of the human hand and arm, grab or carry objects according to a fixed program through programming, and has the respective advantages of both humans and mechanical robots in terms of structure and performance. The specific structure of the two-axis manipulator is the existing technology and will not be elaborated here.

[0044] Based on the above, when the laminator operates, the positive electrode tab 100 is placed on the first placement table 91, and the first placement table 91 corrects the deviation and positions the positive electrode tab 100. The negative electrode tab 100 is placed on the second placement table 93, and the second placement table 93 corrects the deviation and positions the negative electrode tab 100. Then, through the alternating operation of the first material taking mechanism 7 and the second material taking mechanism 8, the positive electrode tab 100 and the negative electrode tab 100 are alternately stacked on the stacking table. And after each placement of the tab 100 on the stacking table by the film laminating mechanism 6, the film laminating mechanism 6 covers the separator on the topmost tab 100. The film laminating mechanism 6 in this embodiment reciprocates to fold the separator into a Z shape.

[0045] The stacking table is intended to stack the tabs 100 and press and position the tabs 100 to prevent the tabs 100 from warping, the pole group from caving in, the tabs 100 from moving, and the tab ears 200 from folding. In response to scenarios such as large product static electricity or untimely vacuum breakage of the suction cup of the manipulator, it can prevent the tab ears from being lifted when the manipulator is lifted, so that the tab ears are not easily folded, improving the quality of lamination and ultimately improving the quality of the lithium battery. The exemplary structure of the stacking table can be referred to in the following content of this embodiment.

[0046] Refer to Figures 1 to 3 , the stacking table includes a lamination table 1, a pressing knife mechanism, and a driving mechanism. The lamination table 1 is connected above the chassis 9. The driving mechanism is located at the bottom of the lamination table 1. The driving mechanism is connected to the chassis 9, and the pressing knife mechanism is connected to the driving mechanism.

[0047] Specifically, the lamination table 1 is horizontally arranged, and the upper surface of the lamination table 1 is rectangular. The length direction of the lamination table 1 is the first direction, the width direction of the lamination table 1 is the third direction, and the direction perpendicular to the first direction and the third direction is the second direction. In this embodiment, the second direction is the vertical direction. It should be noted that in other embodiments, the lamination table 1 can also be tilted to a certain extent as long as the electrode sheets 100 can be stacked.

[0048] The upper surface of the body of the lamination table 1 forms a first placement area 12. Both ends of the lamination table 1 in the length direction are connected with bosses 11, so that the upper surfaces of the two bosses 11 respectively form two second placement areas 13. In this embodiment, there is only one tab 200 on the stacked electrode sheets 100, and the two second placement areas 13 respectively correspond to the tab 200 of the positive electrode sheet 100 and the tab 200 of the negative electrode sheet 100. When the electrode sheet 100 is placed on the lamination table 1, the electrode sheet 100 is located in the first placement area 12, while the tab 200 of the positive electrode sheet 100 is located in one of the second placement areas 13, and the tab 200 of the negative electrode sheet 100 is located in the other second placement area 13. It should be noted that in other embodiments, the upper surface of the lamination table 1 can also be other shapes such as square, circular, pentagonal, etc., which is not specifically limited as long as the first placement area 12 and the second placement area 13 can be divided.

[0049] The driving mechanism includes a first driving component 4 and a second driving component 5. The second driving component 5 and the first driving component 4 are distributed along the third direction, and the structure of the second driving component 5 is the same as that of the first driving component 4. The first driving component 4 includes a driving frame 41 and a second driving member 42. The second driving member 42 is connected to the driving frame 41, and the second driving member 42 can drive the driving frame 41 to move in a direction perpendicular to the thickness direction of the electrode sheet 100. Specifically, a support frame 92 is connected to the base frame 9. The driving frame 41 is arranged along the first direction, and the driving frame 41 is slidably connected to the support frame 92. The driving frame 41 slides along the second direction. In this embodiment, the second driving member 42 is a cylinder. The cylinder body of the cylinder is connected to the support frame 92, and the piston rod of the cylinder moves in a direction perpendicular to the thickness direction of the electrode sheet 100, that is, the piston rod of the cylinder moves along the second direction. The piston rod of the cylinder is connected to the driving frame 41. In other alternative embodiments, the second driving member 42 can also be other components such as an oil cylinder or an electric cylinder.

[0050] Furthermore, a pressing knife mechanism is provided corresponding to each second placement area 13. In this embodiment, two pressing knife mechanisms are taken as an example, and the two pressing knife mechanisms are respectively located at both ends of the lamination table 1 in the length direction. Each pressing knife mechanism includes a first pressing knife assembly 2 and a second pressing knife assembly 3. The two first pressing knife assemblies 2 are both connected to the driving frame 41 of the first driving assembly 4, and the two second pressing knife assemblies 3 are both connected to the driving frame 41 of the second driving assembly 5. During the lamination process, the first driving assembly 4 drives the first pressing knife assembly 2 to gradually rise with the height of the uppermost pole piece 100 on the lamination table 1, and the second driving assembly 5 drives the second pressing knife assembly 3 to gradually rise with the height of the uppermost pole piece 100 on the lamination table 1.

[0051] The first pressing knife assembly 2 and the second pressing knife assembly 3 can alternately press and position the uppermost pole piece 100 on the lamination table 1 and the tab 200 on this pole piece 100. It can be understood that one first pressing knife assembly 2 and one second pressing knife assembly 3 are provided corresponding to each second placement area 13 in this embodiment, so that one of the first pressing knife assemblies 2 and one of the second pressing knife assemblies 3 can alternately press and position the tab 200 on the uppermost pole piece 100. Specifically, the first pressing knife assembly 2 includes a first pressing knife frame 21, a first pressing knife 22, a sliding seat 23, and a first driving member 24. The sliding seat 23 is slidably connected to the driving frame 41, and the sliding seat 23 moves along the first direction. In this embodiment, a linear guide rail is connected between the driving frame 41 and the sliding seat 23 to guide and drive the sliding seat 23. In other alternative embodiments, the sliding seat 23 can also be driven to slide along the first direction by components such as an oil cylinder and an electric cylinder. The first driving member 24 is connected to the sliding seat 23. In this embodiment, the first driving member 24 is a cylinder, the cylinder body of the cylinder is connected to the sliding seat 23, the piston rod of the cylinder moves along the direction perpendicular to the thickness direction of the pole piece 100, that is, the piston rod of the cylinder moves along the second direction, and the piston rod of the cylinder is connected to the first pressing knife frame 21. In other alternative embodiments, the first driving member 24 can also be other components such as an oil cylinder and an electric cylinder.

[0052] Furthermore, the first pressing knife frame 21 is located at the end of the lamination table 1. The first pressing knife frame 21 includes a first fixing member 211 and a first connecting member 212. The first fixing member 211 is arranged along the second direction, that is, vertically arranged. A plurality of first fixing members 211 are arranged along the third direction, and a horizontal connecting portion 213 is connected to the top end of each first fixing member 211. The first connecting member 212 is connected between two adjacent first fixing members 211, and the first connecting member 212 is located at the bottom end of the first fixing member 211. A connecting rod 214 is connected between the first pressing knife frame 21 and the first driving member 24.

[0053] The first pressing blade 22 is arranged along the first direction, that is, the first pressing blade 22 is horizontally arranged. There are multiple second pressing blades 32 arranged along the third direction. In this embodiment, the number of the first fixing members 211 and the second pressing blades 32 is two each. One end of a single first pressing blade 22 is detachably connected to a single connecting portion 213, and the other end of the first pressing blade 22 extends above the lamination table 1. One of the second pressing blades 32 is located above the first placement area 12, and the other second pressing blade 32 is located above the second placement area 13.

[0054] Based on the above, when the first pressing blade assembly 2 works, through the sliding of the sliding seat 23 and the driving of the first driving member 24, the first pressing blade holder 21 can drive the first pressing blade 22 to move away from or close to the lamination table 1 along the first direction, and can move along the second direction, so that the first pressing blade 22 can press the pole piece 100 and the pole ear 200 from top to bottom. One of the second pressing blades 32 presses the pole piece 100, and the other second pressing blade 32 presses the pole ear 200. In addition, by setting the connecting portion 213, the contact area between the first pressing blade holder 21 and the first pressing blade 22 is increased, which not only facilitates the detachable connection between the first pressing blade holder 21 and the first pressing blade 22, facilitates the replacement of the first pressing blade 22, but also improves the connection stability between the first pressing blade holder 21 and the first pressing blade 22.

[0055] The second pressing blade assembly 3 includes a second pressing blade holder 31 and a second pressing blade 32. The second pressing blade holder 31 is located on the side of the first pressing blade holder 21 close to the lamination table 1. The connection relationship between the second pressing blade holder 31 and the second driving assembly 5 refers to the connection relationship between the first pressing blade holder 21 and the first driving assembly 4, that is, the second pressing blade holder 31 can move along the first direction and the second direction.

[0056] Further, the second pressing blade holder 31 can move along the first direction and the second direction relative to the first pressing blade holder 21. Exemplarily, the second pressing blade holder 31 includes a second fixing member 311 and a second connecting member 312. The second fixing member 311 is arranged along the second direction, that is, vertically arranged. There are multiple second fixing members 311 arranged along the third direction. In this embodiment, two are taken as an example. One second pressing blade 32 is connected to each second fixing member 311. The connection manner between the second pressing blade 32 and the second pressing blade holder 31 refers to the connection manner between the first pressing blade 22 and the first pressing blade holder 21. The multiple second fixing members 311 and the multiple first fixing members 211 are staggered along the third direction, that is, the two first pressing blades 22 and the two second pressing blades 32 are staggered along the third direction.

[0057] The second connecting member 312 is connected between two adjacent second fixing members 311, and the second connecting member 312 is located at the bottom end of the second fixing member 311. There is a gap between the second connecting member 312 and the first connecting member 212 in the first direction, and there is a gap between the second connecting member 312 and the connecting portion 213 in the second direction, that is, there is a gap between the second connecting member 312 and the first pressing blade 22 in the second direction. Thus, the second connecting member 312 can move relative to the first connecting member 212 in the first direction, and the second connecting member 312 can move relative to the connecting portion 213 in the second direction, so that the second pressing blade holder 31 is not likely to interfere with the first pressing blade holder 21 and the first pressing blade 22.

[0058] Based on the above, before the lamination operation, the first pressing blade 22 and the second pressing blade 32 are both located above the side of the lamination table 1. That is, there are gaps between the first pressing blade 22 and the second pressing blade 32 and the lamination table 1 in the first direction, and the first pressing blade 22 and the second pressing blade 32 are arranged higher than the lamination table 1 to prepare for pressing the electrode sheet 100 and the tab 200.

[0059] Then, the lamination operation is carried out. First, the separator is laid on the upper surface of the lamination table 1, and then the negative electrode sheet 100 is placed on the separator. At this time, both the first pressing blade holder 21 and the second pressing blade holder 31 slide in the first direction towards the direction close to the lamination table 1, and the first pressing blade holder 21 and the second pressing blade holder 31 descend synchronously until one first pressing blade 22 and one second pressing blade 32 abut against the electrode sheet 100, and the other first pressing blade 22 and the other second pressing blade 32 abut against the tab 200, so as to realize the pressing and positioning of the bottommost electrode sheet 100. Then, the negative electrode sheet 100 is covered with the separator. During the process of covering the negative electrode sheet 100 with the separator, the first pressing blade holder 21 drives the first pressing blade 22 to reset to the upper side of the lamination table 1 to prepare for pressing the positive electrode sheet 100 to be placed. In actual operation, after placing the negative electrode sheet 100, the first pressing blade holder 21 can also be kept above the side of the lamination table 1 to prepare for pressing the positive electrode sheet 100 to be placed.

[0060] When continuing to stack the positive electrode sheets 100 on the separator, the first pressing blade holder 21 drives the first pressing blade 22 to slide in the first direction towards the direction close to the lamination table 1 again, and the first pressing blade holder 21 drives the first pressing blade 22 to descend synchronously until one first pressing blade 22 abuts against the positive electrode sheet 100, and the other first pressing blade 22 abuts against the tab 200, thereby completing the pressing and positioning of the electrode sheet 100. Then, the positive electrode sheet 100 is covered with a film. At the same time, the second pressing blade holder 31 drives the second pressing blade 32 to reset to the upper side of the lamination table 1 to prepare for pressing the negative electrode sheet 100 and the tab 200 to be placed. The above operation process is continuously repeated until the lamination operation of the lithium battery cell is completed.

[0061] It should be noted that in the process of laminating in this embodiment, the driving mechanism drives the first pressing knife holder 21 and the second pressing knife holder 31 to move in the second direction, so that the heights of the first pressing knife 22 and the second pressing knife 32 change following the height of the uppermost pole piece 100. In other embodiments, the driving mechanism can also be omitted, and by increasing the stroke of the first pressing knife holder 21 and the second pressing knife holder 31 in the second direction, the heights of the first pressing knife 22 and the second pressing knife 32 can be directly adjusted according to the height of the uppermost pole piece 100.

[0062] In the above operation process, since the first pressing knife 22 and the second pressing knife 32 alternately position the uppermost pole piece 100, and after each placement of the pole piece 100, the first pressing knife 22 and the second pressing knife 32 only need two actions to complete the pressing of the pole piece 100. Compared with the original four actions that took 0.24 s, the current time consumption is at least saved by half, and the lamination time of a single station is shortened from 0.8 s to 0.6 s, that is, the time for laminating a single pole piece 100, thus accelerating the lamination speed and improving the lamination efficiency. Moreover, during the working process of both the first pressing knife 22 and the second pressing knife 32, they always press the tab 200 of the pole piece 100, which can prevent the tab 200 from being lifted when the first material taking mechanism 7 and the second material taking mechanism 8 move upward due to reasons such as large product static electricity and untimely vacuum break of the suction cup, thereby avoiding the phenomenon of short circuit of the pole group caused by the folding of the tab 200, improving the lamination quality, and ultimately realizing the double improvement of lamination efficiency and lamination quality, greatly improving the production efficiency and yield rate of lithium battery products.

[0063] In addition, the two first pressing knives 22 and the two second pressing knives 32 are staggered. When the first pressing knife 22 and the second pressing knife 32 operate alternately, the pressing areas of the two first pressing knives 22 and the two second pressing knives 32 on the pole piece 100 are wider, making the force on the pole piece 100 more uniform, the positioning effect better, and preventing the pole piece 100 from being deformed or damaged due to uneven force.

[0064] Optionally, in other embodiments, the first pressing knife holder 21 and the second pressing knife holder 31 can also be spaced apart along the third direction, so that the first pressing knife holder 21 and the second pressing knife holder 31 can operate independently without interference, and the second pressing knife holder 31 can also move relative to the first pressing knife holder 21 in the first direction and the second direction.

[0065] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A stacking platform, comprising a stacking platform (1) and a pressing mechanism, wherein the stacking platform (1) is used for stacking pole pieces (100) with pole ears (200), and is characterized in that: The lamination platform (1) is provided with a first placement area (12) for placing the pole piece (100) and a second placement area (13) for placing the pole lug (200); The knife pressing mechanism is provided with one corresponding to each second placement area (13), and the knife pressing mechanism comprises a first knife pressing assembly (2) and a second knife pressing assembly (3), and the first knife pressing assembly (2) and the second knife pressing assembly (3) are capable of alternately pressing and positioning the topmost pole piece (100) stacked on the lamination platform (1) and the pole ear (200) on the pole piece (100).

2. The stacking platform according to claim 1, characterized in that: The upper surface of the main body of the stacking platform (1) forms the first placement area (12), and bosses (11) are provided on opposite sides of the upper surface of the stacking platform (1), and the upper surface of the bosses (11) forms the second placement area (13).

3. The stacking platform according to claim 1, characterized in that: The first pressing knife assembly (2) comprises: a first pressing tool stand (21), the first pressing tool stand (21) being capable of moving in a first direction parallel to the surface of the pole piece (100) and in a second direction perpendicular to the thickness direction of the pole piece (100); and A first pressing knife (22), wherein the first pressing knife (22) is connected to the first pressing knife frame (21), and a plurality of the first pressing knives (22) are provided, and at least one of the first pressing knives (22) can press against and position the pole piece (100), and at least one of the first pressing knives (22) can press against and position the pole ear (200).

4. The stacking platform according to claim 3, characterized in that: The first knife pressing assembly (2) further comprises: a sliding seat (23), the sliding seat (23) being slidably connected to the lamination platform (1), and the sliding seat (23) moving along the first direction; and A first driving member (24), wherein the first driving member (24) is connected to the sliding seat (23), the first knife pressing frame (21) is connected to the first driving member (24), and the first driving member (24) can drive the first knife pressing frame (21) to move along the second direction.

5. The stacking platform according to claim 3, characterized in that: The first knife pressing frame (21) comprises: a first fixing member (211), wherein each of the first pressing blades (22) is provided with one first fixing member (211), and the first pressing blade (22) is connected to the first fixing member (211); and A first connecting member (212), wherein the first connecting member (212) is connected between two adjacent first fixing members (211).

6. The stacking platform according to claim 5, characterized in that: The second knife pressing assembly (3) comprises: a second knife pressing frame (31), the second knife pressing frame (31) being located at one side of the first knife pressing frame (21), the second knife pressing frame (31) being able to move along the first direction and the second direction relative to the first knife pressing frame (21); and A second pressing knife (32), wherein the second pressing knife (32) is connected to the second pressing knife frame (31), and a plurality of the second pressing knives (32) are provided, and at least one of the second pressing knives (32) is capable of pressing down the pole piece (100), and at least one of the second pressing knives (32) is capable of pressing down the pole ear (200).

7. The stacking platform according to claim 6, characterized in that: The second knife pressing frame (31) comprises: a second fixing member (311), wherein each second pressing knife (32) is provided with one second fixing member (311), the second pressing knife (32) is connected to the second fixing member (311), a plurality of the second fixing members (311) and a plurality of the first fixing members (211) are staggeredly distributed along a third direction, the third direction being perpendicular to the first direction and the second direction, and A second connecting member (312), the second connecting member (312) is connected between two adjacent second fixing members (311), the second connecting member (312) is located at an end of the second fixing member (311) away from the second pressing knife (32), a gap is left between the second connecting member (312) and the first connecting member (212) along the first direction, and a gap is left between the second connecting member (312) and the first pressing knife (22) along the second direction.

8. The stacking platform according to claim 1, characterized in that: The stacking platform also includes a driving mechanism, which includes a first driving component (4) and a second driving component (5); the first pressing tool component (2) is connected to the first driving component (4), and the first driving component (4) can drive the first pressing tool component (2) to move along a thickness direction perpendicular to the pole piece (100); the second pressing tool component (3) is connected to the second driving component (5), and the second driving component (5) can drive the second pressing tool component (3) to move along a thickness direction perpendicular to the pole piece (100).

9. The stacking platform according to claim 8, characterized in that: The first driving assembly (4) comprises: A driving frame (41), all of the first knife pressing assemblies (2) are connected to the driving frame (41); and A second driving member (42), the second driving member (42) is connected to the driving frame (41), and the second driving member (42) can drive the driving frame (41) to move along a direction perpendicular to the thickness of the pole piece (100).

10. A laminating machine, comprising a laminating mechanism (6), a first material taking mechanism (7) and a second material taking mechanism (8), characterized in that: The stacking machine also includes a stacking table as described in any one of claims 1 to 9, the first material picking mechanism (7) and the second material picking mechanism (8) are capable of alternately grabbing the pole piece (100) and placing it on the stacking table, and the coating mechanism (6) is capable of coating the surface of the pole piece (100).

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