Vacuum adsorption device and lamination equipment

Abstract

The utility model relates to the technical field of battery production, and discloses a vacuum adsorption device and lamination equipment. According to the structure, the vacuum adsorption device comprises a base, a vacuum suction assembly and a plurality of adsorption assemblies. The adsorption assembly comprises a first suction cup and an elastic supporting piece, and the first suction cup is connected with the base through the elastic supporting piece. The elastic supporting piece has a compressed state, and when the surface of the side, away from the base, of the first suction cup is pressed, the elastic supporting piece is in the compressed state. The base is provided with a first surface which is fixedly connected with a plurality of second suction cups. Compared with the second suction cup, the first suction cup protrudes out of the first surface, and the height of the first suction cup protruding out of the first surface is larger than that of the second suction cup protruding out of the first surface. And at the sheet combining station, the first suction cups in the vacuum adsorption devices on the two sides of the diaphragm are in one-to-one correspondence and abut against each other, so that the positive plate, the diaphragm and the negative plate are tightly pressed, and relative dislocation of the positive plate, the diaphragm and the negative plate does not occur easily.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field especially relates to a vacuum adsorption device and laminating equipment. BACKGROUND

[0002] In the production process of lithium ion battery, laminating procedure is a very key procedure, directly influences the quality of lithium ion battery. Simply speaking, laminating procedure is to stack positive plate, negative plate and diaphragm, thereby forms electric core. In this procedure, can adopt two vacuum adsorption devices to suck positive plate and negative plate respectively, and transfer positive plate and negative plate to laminating station. In laminating station, positive plate and negative plate are located at the two sides of diaphragm respectively. Then, two vacuum adsorption devices drive positive plate and negative plate to approach each other to laminate, after laminating, sends laminating gripper to clamp positive plate, negative plate and diaphragm after laminating, and sends to laminating table to laminate.

[0003] However, in one prior art, after two vacuum adsorption devices transfer positive plate and negative plate to laminating station, positive plate and negative plate cannot be compressed and attached. In this case, when laminating gripper clamps positive plate, negative plate and diaphragm, positive plate and negative plate are prone to dislocation relative to diaphragm, thereby affecting the quality of electric core. SUMMARY

[0004] The utility model provides a kind of vacuum adsorption device and laminating equipment to solve the problem that in prior art, in laminating station, positive plate and negative plate cannot be completely attached, laminating gripper clamps positive plate, negative plate and diaphragm, and positive plate and negative plate are prone to dislocation relative to diaphragm.

[0005] In the first aspect, the utility model embodiment provides a kind of vacuum adsorption device.The vacuum adsorption device includes base, vacuum suction assembly and multiple adsorption components;Wherein:

[0006] The adsorption component includes first suction cup and elastic support;The first suction cup and the vacuum suction assembly are communicated, and the first suction cup is connected by the elastic support and the base;The elastic support has compression state, when the side surface of the first suction cup away from the base is subjected to pressure, the elastic support is in the compression state;

[0007] The base has first surface, and the first surface is fixedly connected with multiple second suction cups;

[0008] The first suction cup protrudes from the first surface, and the height of the first suction cup protruding from the first surface is greater than the height of the second suction cup protruding from the first surface.

[0009] The vacuum adsorption device provided by the embodiment of the utility model has the following beneficial effects:

[0010] In the production process of the battery, the vacuum adsorption device can be used to transfer the pole piece from the pre-positioning platform to the piece combining station. In the piece combining station, the first suction disc in the vacuum adsorption device located on the two sides of the diaphragm is one-to-one corresponding and abuts against each other, and the elastic support is in the compressed state, so that the positive pole piece, the diaphragm and the negative pole piece are compressed and are not prone to relative misplacement.

[0011] In the second aspect, the embodiment of the utility model provides a piece stacking device. The piece stacking device comprises two vacuum adsorption devices as described in the first aspect, one of the two vacuum adsorption devices is used to transfer the positive pole piece to the piece combining station, and the other of the two vacuum adsorption devices is used to transfer the negative pole piece to the piece combining station; in the two vacuum adsorption devices, at least part of the first suction disc is used to adsorb the edge of the pole piece.

[0012] In the piece combining station, the positive pole piece and the negative pole piece are located on the opposite sides of the diaphragm; the first suction disc in the two vacuum adsorption devices is one-to-one corresponding and compresses the positive pole piece, the negative pole piece and the diaphragm together.

[0013] The piece stacking device provided by the embodiment of the utility model has the following beneficial effects:

[0014] In the production process of the battery, the vacuum adsorption device can be used to transfer the pole piece from the pre-positioning platform to the piece combining station. In the piece combining station, the first suction disc in the vacuum adsorption device located on the two sides of the diaphragm is one-to-one corresponding and abuts against each other, and the elastic support is in the compressed state, so that the positive pole piece, the diaphragm and the negative pole piece are compressed and are not prone to relative misplacement. When the positive pole piece, the diaphragm and the negative pole piece are clamped by the piece stacking clamp, the three are not prone to relative misplacement, so that the position accuracy of the positive pole piece and the negative pole piece is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structural diagram of the vacuum adsorption device provided by the embodiment of the utility model is provided;

[0016] Figure 2 A schematic view of the two vacuum adsorption devices provided by the embodiment of the utility model in the piece combining station is provided;

[0017] Figure 3 A schematic view of the vacuum adsorption device provided by the embodiment of the utility model for adsorbing the pole piece from the bearing surface of the pole piece is provided;

[0018] Figure 4 Another structural diagram of the vacuum adsorption device provided by the embodiment of the utility model is provided;

[0019] Figure 5Another structural diagram of a vacuum adsorption device provided by an embodiment of the present application;

[0020] Figure 6 A distribution diagram of the first and second suction discs provided by an embodiment of the present application in the orthographic projection of the plane in which the first surface is located;

[0021] Figure 7 A structural diagram of a vacuum adsorption device provided by an embodiment of the present application from a first perspective;

[0022] Figure 8 A structural diagram of a vacuum adsorption device provided by an embodiment of the present application from a second perspective;

[0023] Figure 9 A partial enlarged view of a vacuum adsorption device provided by an embodiment of the present application.

[0024] Reference signs:

[0025] 1-base; 101-via; 102-first surface; 103-notch; 11-main part; 12-subpart;

[0026] 13-fixed part; 121-substrate; 122-boss; 1221-adsorption hole; 2-vacuum suction assembly;

[0027] 3-adsorption assembly; 31-first suction disc; 32-elastic support; 33-suction rod; 34-sleeve;

[0028] 35-locking structure; 351-fixing nut; 4-second suction disc; 5-pole piece; 5a-positive pole piece;

[0029] 5b-negative pole piece; 6-bearing surface; 7-septum; MN-first axis of symmetry; AB-second axis of symmetry. DETAILED DESCRIPTION

[0030] The technical solutions in the example embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the example embodiments of the present application. The example embodiments described in this paper are only for illustrative purposes, and are not intended to limit the protection scope of the present application, so it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present application.

[0031] In the description of the present application, unless otherwise explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" means two or more than two; the term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0032] Unless otherwise defined or specified, the terms "connect", "fixed", and the like are to be construed broadly, for example, "connect" can be fixed connection, or detachable connection, or integrally connected, or electrical connection, or signal connection; "connect" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Further, in the description of the present application, it should be understood that the orientation terms such as "upper", "lower", "inner", "outer" and the like described in the example embodiments of the present application are described with the angle shown in the drawings, and should not be construed as a limitation on the example embodiments of the present application. It should also be understood that in the context, when referring to one element or feature connected to another element (one or more) "on", "under", or "inner", "outer", it can not only be directly connected to another element (one or more) "on", "under", or "inner", "outer", but also indirectly connected to another element (one or more) "on", "under", or "inner", "outer" through an intermediate element.

[0034] In order to facilitate the understanding of the technical solutions provided by the present application, first of all, the application scenario of the present application will be introduced. The present application relates to a vacuum suction device, the object sucked by the vacuum suction device can be some sheet-shaped components, for example, pole piece, steel sheet, etc. In the following, the structure and effect of the above-mentioned vacuum suction device will be described in detail with the pole piece as the suction object.

[0035] It should be noted that the pole piece is a component of the battery. In one production process of the battery, first, the positive material belt and the negative material belt are cut to form positive and negative pole pieces with a set shape and size; then, the positive and negative pole pieces are transferred to the corresponding positioning platform; on the positioning platform, the positions of the positive and negative pole pieces are corrected; then, the positive and negative pole pieces are transferred to the piece combining station; on the piece combining station, the positive and negative pole pieces are located on both sides of the diaphragm, and the stacking clamp jaw clamps the positive and negative pole pieces and the diaphragm, and stacks them to the stacking table. One end of the diaphragm is fixed to the stacking table, and the other end is wound on the unwinding roller. On the stacking table, the diaphragm is Z-shaped stacked, so as to separate the positive and negative pole pieces.

[0036] In the above production process of the battery cell, the vacuum suction device can be used to suck the pole piece from the positioning platform and transfer the pole piece to the piece combining station. However, in the piece combining station, the outer circle of the positive and negative pole pieces is warped, and the positive and negative pole pieces are not completely attached. When the stacking clamp jaw clamps the positive and negative pole pieces and the diaphragm, the positive and negative pole pieces are prone to misalignment relative to the diaphragm, thereby affecting the quality of the battery cell.

[0037] In view of the above, the embodiment of the present application provides a vacuum adsorption device to reduce the risk of misalignment of the pole piece relative to the diaphragm at the splicing station. To improve the stability of adsorption and reduce misalignment in the case of uneven bearing surface of the pole piece.

[0038] Figure 1 A structural schematic diagram of the vacuum adsorption device provided by the embodiment of the present application is shown in FIG. 1. In one embodiment, the vacuum adsorption device includes a base 1, a vacuum suction assembly 2, and a plurality of adsorption assemblies 3. Specifically, the adsorption assembly 3 is arranged on the base 1, and the adsorption assembly 3 includes a first suction disc 31, which is in communication with the vacuum suction assembly 2. The vacuum suction assembly 2 can form a negative pressure inside the first suction disc 31, so that the pole piece 5 is tightly attached to the first suction disc 31 under the action of atmospheric pressure, or in other words, the first suction disc 31 adsorbs the pole piece 5. The vacuum suction assembly 2 can also release the negative pressure state of the first suction disc 31, so that the pole piece 5 is separated from the first suction disc 31. Figure 1

[0039] In the specific arrangement of the vacuum suction assembly 2, the vacuum suction assembly 2 can include a vacuum pump or a vacuum generator.

[0040] In the specific arrangement of the adsorption assembly 3, the number of adsorption assemblies 3 is not limited, for example, the adsorption assembly 3 can be two, three, four or other number. Here, the present application does not enumerate one by one. In the specific arrangement of the plurality of adsorption assemblies 3, the plurality of adsorption assemblies 3 can be randomly distributed, or can be distributed in a circular or array manner.

[0041] In one specific embodiment, at least part of the adsorption assemblies 3 can be distributed at the edge position of the base 1, so that in the process of sucking the pole piece 5, the adsorption assemblies 3 can adsorb the edge area of the pole piece 5 to reduce the warping of the edge of the pole piece 5. Optionally, some adsorption assemblies 3 can be distributed in the corner area of the base 1.

[0042] In the specific arrangement of the first suction disc 31, the first suction disc 31 can be a horn-shaped structure. In this way, the first suction disc 31 and the pole piece 5 have a larger contact area, thereby improving the adsorption effect of the pole piece 5. In the preparation of the first suction disc 31, flexible materials such as rubber and silicone can be used to reduce damage to the pole piece 5 during the adsorption of the pole piece 5.

[0043] In the specific installation of the first suction disc 31, the first suction disc 31 can be elastically connected with the base 1. As shown in FIG. 2, the first suction disc 31 can be elastically connected with the base 1 through a spring 4. Figure 1 ​As shown, the adsorption assembly 3 further comprises an elastic support 32, and the first suction cup 31 is connected to the base 1 through the elastic support 32. When the side surface of the first suction cup 31 away from the base 1 is subjected to a pressure, the elastic support 32 can be compressed and deformed, so as to be in a compressed state. The greater the pressure on the side surface of the first suction cup 31 away from the base 1, the greater the compression amount of the elastic support 32. Conversely, the smaller the pressure on the side surface of the first suction cup 31 away from the base 1, the smaller the compression amount of the elastic support 32.

[0044] Please continue to refer to Figure 1 In addition to the first suction cup 31, the vacuum adsorption device further comprises a plurality of second suction cups 4, which are also communicated with the vacuum suction assembly 2. Moreover, the base 1 has a first surface 102, and the plurality of second suction cups 4 are fixed to the first surface 102. Taking the state that the vacuum adsorption device adsorbs the pole piece 5 as a reference state, the first surface 102 is located on the side of the base 1 facing the pole piece 5.

[0045] The second suction cup 4 and the first suction cup 31 are the same in that both are communicated with the vacuum suction assembly 2. That is, the vacuum suction assembly 2 can also form a negative pressure in the second suction cup 4, so that the second suction cup 4 adsorbs the pole piece 5. The arrangement of the second suction cup 4 increases the adsorption force of the vacuum adsorption device on the pole piece 5, improves the adsorption effect of the pole piece 5, and makes the pole piece 5 not easy to fall off during the transfer process.

[0046] The second suction cup 4 and the first suction cup 31 are different in that the first suction cup 31 is connected to the base 1 through the elastic support 32, and the first suction cup 31 is in a floating state relative to the base 1. While the second suction cup 4 is fixed to the first surface 102 of the base 1, that is, the second suction cup 4 is fixed relative to the base 1.

[0047] It should be pointed out that the adsorption strength of the second suction cup 4 on the pole piece 5 can be the same as or different from the adsorption strength of the first suction cup 31 on the pole piece 5. In specific implementation, the area of the orthographic projection of the second suction cup 4 on the plane where the first surface 102 is located can be the same as or different from the area of the orthographic projection of the first suction cup 31 on the plane where the first surface 102 is located.

[0048] Please continue to refer to Figure 1With the plane containing the first surface 102 as a reference, the first suction cup 31 protrudes from the first surface 102, and the height of the first suction cup 31 protruding from the first surface 102 is greater than the height of the second suction cup 4 protruding from the first surface 102. The height of the first suction cup 31 protruding from the first surface 102 is greater than zero, and the height of the second suction cup 4 protruding from the first surface 102 is greater than or equal to zero. In specific design, the second suction cup 4 can be flush with the first surface 102, or it can be slightly protruding from the first surface 102. If the height of the first suction cup 31 protruding from the first surface 102 is represented by H1, and the height of the second suction cup 4 protruding from the first surface 102 is represented by H2, then H1 > 0, H2 ≥ 0.

[0049] In one embodiment, 1.0mm ≤ H1 - H2 ≤ 2.0mm. Optionally, the above difference can be 1.2mm, 1.4mm, 1.6mm, 1.8mm, or other values.

[0050] During the process of adsorbing the electrode sheet, both the first suction cup 31 and the second suction cup 4 of the aforementioned vacuum adsorption device can generate adsorption force on the electrode sheet 5, thereby making the electrode sheet 5 more stable during the transfer process. Furthermore, since the height difference between the first suction cup 31 and the second suction cup 4 is small, the deformation of the electrode sheet 5 is reduced, allowing the electrode sheet 5 to be in a relatively flat state after being adsorbed.

[0051] During the stacking process, two vacuum adsorption devices are required to transfer electrode 5 to the lamination station. Figure 2 This is a schematic diagram of two vacuum adsorption devices provided in an embodiment of this application at a lamination station, as shown below. Figure 2 As shown, in one embodiment, one of the two vacuum adsorption devices transfers the positive electrode 5a to the lamination station, and the other transfers the negative electrode 5b to the lamination station. At the lamination station, the positive electrode 5a and the negative electrode 5b are located on both sides of the separator 7, and the two vacuum adsorption devices are also located on both sides of the separator 7. The first suction cups 31 in the two vacuum adsorption devices correspond one-to-one. Since the height of the first suction cup 31 protruding from the first surface 102 is greater than the height of the second suction cup 4 protruding from the first surface 102, at the lamination station, the first suction cups 31 in the two vacuum adsorption devices can abut against each other, and the elastic support member 32 is in a compressed state, thereby pressing the positive electrode 5a, the separator 7, and the negative electrode 5b together, making it difficult for the three to move relative to each other.

[0052] In one embodiment, at least some of the first suction cups 31 in the vacuum adsorption device can be distributed along the edge of the base 1. Thus, the first suction cups 31 can correspondingly adsorb the edge region of the electrode 5, thereby reducing the warpage of the edge region of the electrode 5. Furthermore, at the lamination station, the edge regions of the positive electrode 5a and the negative electrode 5b can be pressed together by the corresponding first suction cups 31, making it less likely for the positive electrode 5a and the negative electrode 5b to shift relative to the separator 7.

[0053] Furthermore, during the process of the aforementioned vacuum adsorption device picking up the electrode 5 from the bearing surface 6 of the electrode 5, when the bearing surface 6 of the electrode 5 is uneven, the elastic support members 32 at different positions can undergo adaptive compression deformation, thereby ensuring that the first suction cup 31 makes good contact with the electrode 5, thus producing a good adsorption effect on the electrode 5 and making it less likely for the electrode 5 to become misaligned during transfer. The aforementioned bearing surface can refer to the surface of the belt or the surface of the pre-positioning platform.

[0054] Figure 3 A schematic diagram of a vacuum adsorption device provided in this application for picking up an electrode from the bearing surface of the electrode, as shown in the embodiment. Figure 3 As shown, when the bearing surface 6 of the electrode 5 has a protrusion 601, during the process of adsorbing the electrode 5 using the aforementioned vacuum adsorption device, the electrode 5 covering the surface of the protrusion 601 first contacts the first suction cup 31. Then, as the vacuum adsorption device gradually approaches the bearing surface 6 of the electrode 5, the protrusion 601 will squeeze the elastic support member 32 connected to the first suction cup 31, causing the elastic support member 32 to undergo compression deformation. During this process, the first suction cups 31 at other positions successively contact the electrode 5, and the correspondingly provided elastic support members 32 can undergo adaptive compression deformation or remain unchanged. When the vacuum adsorption device is stationary relative to the bearing surface 6 of the electrode 5, under the elastic adjustment of the elastic support member 32, the first suction cups 31 at different positions can all make close contact with the electrode 5, thereby adsorbing the electrode 5.

[0055] It should be added that when the bearing surface 6 of the electrode 5 is relatively flat, during the process of adsorbing the electrode 5 using the above-mentioned vacuum adsorption device, the compression state of the elastic support members 32 at different positions is basically the same, and each of the first suction cups 31 can contact and adsorb the electrode 5. It can be seen that the above-mentioned vacuum adsorption device can be compatible with both flat and uneven bearing surfaces 6 of the electrode 5.

[0056] There are various ways to specifically connect the first suction cup 31 and the vacuum suction assembly 2. For example... Figure 1As shown, in one embodiment, in addition to the first suction cup 31 and the elastic support member 32, the adsorption assembly 3 also includes a suction rod 33, which has a hollow structure. One end of the suction rod 33 is connected to the suction cup, and the other end of the suction rod 33 away from the suction cup is connected to the vacuum suction assembly 2. The base 1 has a through hole 101, and the suction rod 33 is located within the through hole 101. Furthermore, the suction rod 33 can move axially within the through hole 101.

[0057] The aforementioned suction rod 33 has a certain structural strength, thus providing support for the first suction cup 31. Furthermore, when the first suction cup 31 is subjected to pressure, the suction rod 33 can guide the elastic support member 32 to undergo compression deformation along the length direction of the suction rod 33, making it less likely for the elastic support member 32 to tilt.

[0058] In another embodiment, in addition to the first suction cup 31 and the elastic support 32, the adsorption assembly 3 also includes a flexible tube, one end of which is connected to the first suction cup 31 and the other end of which is connected to the vacuum suction assembly 2. In this embodiment, the base 1 may also be provided with a through hole 101, so that the aforementioned flexible tube passes through the through hole 101.

[0059] When installing the elastic support 32, one end of the elastic support 32 abuts against the first suction cup 31, and the other end of the elastic support 32 away from the first suction cup 31 can abut directly against the base 1 or indirectly against the base 1. The following will describe the two arrangements in detail.

[0060] like Figure 1 As shown, in one embodiment, one end of the elastic support 32 abuts against the first suction cup 31, and the other end of the elastic support 32 away from the first suction cup 31 abuts directly against the base 1. The suction rod 33 passes through the interior of the elastic support 32 and exits through the through hole 101 of the base 1. When the first suction cup 31 is subjected to pressure, the elastic support 32 can undergo compression deformation, causing the suction rod 33 to move axially within the through hole 101.

[0061] To improve the stability of the elastic support 32, the surface of the base 1 can be provided with a groove, so that the end of the elastic support 32 away from the first suction cup 31 is located in the groove, thereby reducing the risk of misalignment of the elastic support 32 on the surface of the base 1 and improving the stability of the elastic support 32.

[0062] Figure 4 This is another structural schematic diagram of the vacuum adsorption device provided in the embodiments of this application, as shown below. Figure 4As shown, in an embodiment, the adsorption assembly 3 further comprises a sleeve 34, which is sleeved on the outside of the suction rod 33. The sleeve 34 is located in the through hole 101, and the sleeve 34 and the base 1 are fixedly connected. Optionally, the sleeve 34 and the base 1 can be threadedly connected or welded. The suction rod 33 can move axially in the inside of the sleeve 34, and the sleeve 34 can guide the suction rod 33, so that the suction rod 33 is always in the central position of the sleeve 34, reducing the risk of tilting of the suction rod 33.

[0063] Please continue to refer to Figure 4 When the elastic support 32 is installed, one end of the elastic support 32 abuts against the bottom of the first suction disc 31, and the other end of the elastic support 32 away from the first suction disc 31 can abut against the end of the sleeve 34. Since the sleeve 34 is fixed relative to the base 1, the other end of the elastic support 32 away from the suction disc can be understood as abutting against the base 1 indirectly. When the first suction disc 31 is subjected to pressure, the elastic support 32 can be compressed and deformed, so that the suction rod 33 moves axially relative to the sleeve 34.

[0064] When the sleeve 34 and the base 1 are connected, various connection modes are included. For example Figure 4 As shown, in an embodiment, the peripheral surface of the sleeve 34 has threads, and the inner wall of the through hole 101 also has threads, or in other words, the through hole 101 is a threaded hole. The sleeve 34 is located in the through hole 101, and the sleeve 34 and the through hole 101 are threadedly connected.

[0065] During the process of sucking the pole piece, the sleeve 34 can be fixed relative to the base 1. When it is necessary to adjust the height of the first suction disc 31, the sleeve 34 can be rotated, so that the length of the part of the sleeve 34 located on the side where the first suction disc 31 is located changes, thereby adjusting the initial height of the first suction disc 31, and thus the different scene requirements can be met, thereby improving the adaptability of the vacuum adsorption device.

[0066] Figure 5 Another structural schematic diagram of the vacuum adsorption device provided by the embodiment of the present application is shown in FIG. 4. Figure 5 As shown, in an embodiment, the sleeve 34 can move along the central axis direction of the through hole 101. Moreover, the adsorption assembly 3 further comprises a locking structure 35 for locking and fixing the sleeve 34 and the base 1. The locking structure 35 has a locked state and an unlocked state. When the locking structure 35 is in the unlocked state, the sleeve 34 can move along the central axis direction of the through hole 101, so that the length of the part of the sleeve 34 located on the side where the first suction disc 31 is located changes, thereby achieving the purpose of adjusting the initial height of the first suction disc 31. When the locking structure 35 is in the locked state, the sleeve 34 and the base 1 are locked and fixed.

[0067] In one embodiment of the locking structure 35, the locking structure 35 includes two fixing nuts 351. The two fixing nuts 351 are arranged at intervals along the length of the sleeve 34, and are threadedly connected to the sleeve 34. The two fixing nuts 351 are located on both sides of the through hole 101 and press against the surface of the base 1, thereby locking and fixing the sleeve 34 and the base 1.

[0068] When it is necessary to adjust the height of the first suction cup 31, by rotating the two fixing nuts 351, the two fixing nuts 351 are moved away from each other, allowing the sleeve 34 to move along the central axis of the through hole 101. This adjusts the length of the portion of the sleeve 34 located on the side where the first suction cup 31 is located, thereby achieving the purpose of adjusting the height of the first suction cup 31. Then, the two fixing nuts 351 can be tightened, causing them to press against the surface of the base 1, thereby fixing the sleeve 34.

[0069] Of course, the locking structure 35 can also have other structural forms, which will not be listed one by one in this application.

[0070] When specifically setting the elastic support 32, the elastic support 32 can be a spring or an elastic element made of flexible materials such as rubber or silicone.

[0071] During the adsorption process of the aforementioned vacuum adsorption device, the first suction cup 31 initially contacts the electrode 5. When the bearing surface 6 of the electrode 5 is uneven, the elastic support member 32 connected to the first suction cup 31 can undergo adaptive compression deformation. The second suction cup 4 may or may not contact the electrode 5. Under the action of the vacuum suction assembly 2, both the first suction cup 31 and the second suction cup 4 are in a negative pressure state, thereby generating an adsorption force on the electrode 5.

[0072] Figure 6 A schematic diagram showing the distribution of the first and second suction cups as orthographic projections onto the plane containing the first surface, as provided in the embodiments of this application. Figure 6 As shown, in one embodiment, the first surface 102 has a first axis of symmetry AB and a second axis of symmetry MN, the first axis of symmetry AB and the second axis of symmetry MN are perpendicular to each other, and the first axis of symmetry AB and the second axis of symmetry MN intersect, and the intersection point of the first axis of symmetry AB and the second axis of symmetry MN is located at the center of the first surface 102.

[0073] With the first symmetry axis AB as a reference, the first suction cup 31 and the second suction cup 4 can be arranged in the following manner: the distance from the center of the orthographic projection of the first surface 102 to the first symmetry axis AB is greater than the distance from the center of the orthographic projection of the second suction cup 4 to the first symmetry axis AB. In other words, the first suction cup 31 is farther away from the first symmetry axis AB than the second suction cup 4. Alternatively, the first suction cup 31 is closer to the edges of the first surface 102 on both sides of the first symmetry axis AB. For ease of description, the above arrangement can be referred to as arrangement one.

[0074] With the second symmetry axis MN as a reference, the first suction cup 31 and the second suction cup 4 can be arranged in the following manner: the distance from the center of the orthographic projection of the first surface 102 to the second symmetry axis MN can be greater than the distance from the center of the orthographic projection of the second suction cup 4 to the second symmetry axis MN. In other words, the first suction cup 31 is farther away from the second symmetry axis MN than the second suction cup 4. Alternatively, the first suction cup 31 is closer to the edges of the first surface 102 on both sides of the second symmetry axis MN. For ease of description, the above arrangement can be referred to as arrangement two.

[0075] For any one of the plurality of first suction cups 31 included in the vacuum adsorption device, the first suction cup 31 can simultaneously satisfy the above-mentioned arrangement one and arrangement two. Alternatively, the first suction cup 31 can satisfy one of the arrangement one and the arrangement two.

[0076] For the plurality of first suction cups 31 included in the vacuum adsorption device, the plurality of first suction cups 31 can simultaneously satisfy the above-mentioned arrangement one and arrangement two. Alternatively, part of the first suction cups 31 simultaneously satisfy the arrangement one and the arrangement two, and part of the first suction cups 31 satisfy the arrangement one. Alternatively, part of the first suction cups 31 simultaneously satisfy the arrangement one and the arrangement two, and part of the first suction cups 31 satisfy the arrangement two. Alternatively, part of the first suction cups 31 satisfy the arrangement one, and part of the first suction cups 31 satisfy the arrangement two.

[0077] With the center O of the first surface 102 as a reference, in one embodiment, L1 represents the distance from the center of the orthographic projection of the first suction cup 31 on the first surface 102 to the center O of the first surface 102, and L2 represents the distance from the center of the orthographic projection of the second suction cup 4 on the first surface 102 to the center O of the first surface 102, then L1>L2. In this way, the orthographic projection of the plurality of second suction cups 4 on the first surface 102 is located within the polygon formed by the orthographic projection of the plurality of first suction cups 31 on the first surface 102. That is, the second suction cup 4 is surrounded by the first suction cup 31.

[0078] It is worth noting that the distance from the center of the orthographic projection of each first suction cup 31 onto the plane containing the first surface 102 to the center O of the first surface 102 can be equal or unequal. Similarly, the distance from the center of the orthographic projection of each second suction cup 4 onto the plane containing the first surface 102 to the center O of the first surface 102 can be equal or unequal.

[0079] In the above embodiments, the first suction cup 31 can be distributed in the edge area of ​​the base 1, and the second suction cup 4 can be distributed in the center area of ​​the base 1. Accordingly, the first suction cup 31 can adsorb the edge area of ​​the electrode sheet, and the second suction cup 4 can adsorb the center area of ​​the electrode sheet. At the lamination station, after the first suction cup 31 in the vacuum adsorption device located on both sides of the diaphragm comes into contact, the edge of the electrode sheet can be pressed tightly, thereby reducing the warping of the electrode sheet edge, improving the accuracy of visual edge grasping, and reducing the risk of electrode skipping.

[0080] The base 1 can have various structural forms. For example, the base 1 can be a flat plate. Alternatively, it can be a hollow structure with cavities. Furthermore, the base 1 can be a single piece or assembled from multiple parts. The structure of the base 1 will be described in detail below, along with explanations of the arrangement and installation of the adsorption components 3 on the base 1.

[0081] Figure 7 This is a schematic diagram of the vacuum adsorption device provided in the embodiments of this application from a first-view perspective. Figure 8 This is a schematic diagram of the vacuum adsorption device described above from a second perspective. Figure 7 and Figure 8 As shown, in one embodiment, the base 1 has notches 103 on opposite sides along the first direction X, and each notch 103 accommodates an adsorption component 3. Optionally, the first direction X can be... Figure 5 The first axis of symmetry AB shown extends in the same direction.

[0082] In the above embodiment, by providing notches 103 on both sides of the base 1 along the first direction X, the adsorption component 3 is accommodated within the notches 103, thereby avoiding the adsorption component 3 additionally increasing the size of the vacuum adsorption device along the first direction X, which helps to reduce the space occupied by the vacuum adsorption device. In addition, when the base 1 is also provided with a second suction cup 4, the space corresponding to the notch 103 can at least accommodate part of the elastic support member 32, thereby reducing the height difference between the first suction cup 31 and the second suction cup 4, and thus improving the flatness of the electrode 5 after adsorption.

[0083] Please continue to refer to this. Figure 7 and Figure 8In an embodiment, the base 1 comprises a main part 11 and a plurality of sub-parts 12, which are distributed on both sides of the main part 11 along the second direction Y. Optionally, the second direction Y can be parallel to the first direction X. Figure 5 The extension direction of the second symmetry axis MN is consistent with the direction shown.

[0084] When the notch 103 is arranged in the base 1, the notch 103 can be located on both sides of the main part 11 along the first direction X, and one or more adsorption assemblies 3 can be accommodated in each notch 103. In the specific installation of the adsorption assembly 3, the side of the main part 11 away from the first suction cup 31 is provided with a fixed part 13, the fixed part 13 can cover the notch 103, and the fixed part 13 and the main part 11 are fixedly connected, and the fixed part 13 can carry the adsorption assembly 3. Specifically, the fixed part 13 has a through hole 101, and the adsorption rod 33 in the adsorption assembly 3 passes through the through hole 101. The elastic support 32 in the adsorption assembly 3 can be directly or indirectly supported on the surface of the fixed part 13.

[0085] When the main part 11 is specifically arranged, the main part 11 can be a hollow structure to reduce the weight of the base 1. The surface of the main part 11 can be provided with a plurality of second suction cups 4, and the part of the pipeline connected with the second suction cup 4 can be arranged in the inner cavity of the main part 11.

[0086] When the sub-part 12 is specifically arranged, the sub-part 12 is fixedly connected with the main part 11. Each sub-part 12 can be provided with at least one adsorption assembly 3, which is located at the end of the base 1 along the second direction Y and can adsorb the corresponding end position of the pole piece 5. In other embodiments, the sub-part 12 can also not be provided with the adsorption assembly 3.

[0087] As shown in the figure, in an embodiment, the sub-part 12 comprises a base plate 121 and a boss 122, the base plate 121 is fixedly connected with the main part 11, and the base plate 121 is provided with at least one adsorption assembly 3. The boss 122 protrudes from the surface of the base plate 121, and the boss 122 is located on the side of the adsorption assembly 3 away from the base 1. Figure 8

[0088] When the boss 122 is specifically arranged, with the base plate 121 as the reference, the height of the boss 122 protruding from the surface of the base plate 121 is less than the height of the first suction cup 31 protruding from the surface of the base plate 121. With the main part 11 as the reference, the side surface of the boss 122 facing the pole piece 5 can be flush with the side surface of the main part 11 facing the pole piece 5. The boss 122 can form support for the end of the pole piece 5 along the first direction X.

[0089] Please continue to refer to Figure 8 ​In one embodiment, the plurality of sub-parts 12 included in the base 1 includes a first sub-part 12a corresponding to the tab of the pole piece 5. The plurality of suction holes 1221 are arranged on the side surface of the boss 122 of the first sub-part 12a corresponding to the tab of the pole piece 5, and the plurality of suction holes 1221 are in communication with the vacuum suction assembly 2. The vacuum suction assembly 2 can cause the plurality of suction holes 1221 to be in a negative pressure state, thereby adsorbing the tab of the pole piece 5. Correspondingly, the first suction disc 31 and the second suction disc 4 are used to adsorb the material area of the pole piece 5.

[0090] For the pole piece 5, the material area of the pole piece 5 has active material, and the tab does not have active material. Therefore, the material area of the pole piece 5 is thicker, and the tab is thinner. In the case of uneven force, the tab is prone to wrinkling. In the above embodiment, the adsorption force generated by the suction hole 1221 is small relative to the first suction disc 31 and the second suction disc 4, which can reduce the adsorption force on the local tab. Moreover, the suction holes 1221 can be uniformly distributed on the surface of the boss 122, thereby making the force on the tab uniform. In addition, the arrangement of the suction holes 1221 will not affect the flatness of the surface of the boss 122, so that the tab can be attached to the surface of the boss 122 in a flat state. In this way, the above-mentioned suction holes 1221 can adapt to the characteristics of the thin and wrinkled tab of the pole piece 5, and can reduce the wrinkles of the tab when adsorbing the tab.

[0091] Figure 9 A structural diagram of a sub-part of a base provided by an embodiment of the present application is shown in Figure 9 In one embodiment, the surface of the base plate 121 has a limiting protrusion 1211 abutting the edge of the main body part 11, thereby forming a limit. The base plate 121 has a fixing hole that can accommodate a fastener, and the fastener is used to fixedly connect the base plate 121 and the main body part 11.

[0092] In addition, the base plate 121 can also abut the fixing part 13, thereby limiting each other. For example, after the fixing part 13 is installed on the main body part 11, the edge of the base plate 121 can be made to abut the edge of the fixing part 13, and the limiting protrusion 1211 can be made to abut the main body part 12, thereby jointly determining the position of the base plate 121.

[0093] Based on the same technical concept, an embodiment of the present application also provides a lamination device. The lamination device includes two vacuum suction devices, one of the two vacuum suction devices is used to transfer a positive pole piece to a lamination station, and the other of the two vacuum suction devices is used to transfer a negative pole piece to the lamination station.

[0094] As shown in Figure 2As shown, at the laminating station, the positive plate 5a and the negative plate 5b are located on the opposite sides of the diaphragm 7. The first suction disc 31 in the two vacuum suction devices corresponds one by one, and the elastic support 32 is in a compressed state, thereby compressing the positive plate 5a, the diaphragm 7 and the negative plate 5a. When the positive plate 5a, the diaphragm 7 and the negative plate 5b are clamped by the feeding laminating gripper, the three are not easy to relatively move, thereby ensuring the position accuracy of the positive plate 5a and the negative plate 5b.

[0095] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A vacuum suction device, characterized by, The base, the vacuum suction assembly and the plurality of suction assemblies are included. The suction assembly includes a first suction disc and an elastic support; the first suction disc and the vacuum suction assembly are in communication, and the first suction disc is connected through the elastic support and the base; the elastic support has a compression state, and when the side surface of the first suction disc away from the base is subjected to pressure, the elastic support is in the compression state. The base has a first surface, and a plurality of second suction discs are fixedly connected to the first surface. The first suction disc protrudes from the first surface, and the height of the first suction disc protruding from the first surface is greater than the height of the second suction disc protruding from the first surface.

2. The vacuum chuck of claim 1, wherein The suction assembly further includes a suction rod having a hollow structure; one end of the suction rod is in communication with the suction disc, and the other end of the suction rod is in communication with the vacuum suction assembly. The base has a through hole, the suction rod is located in the through hole, and the suction rod can move along the central axis direction of the through hole.

3. The vacuum chuck of claim 2, wherein The suction assembly further includes a sleeve and a locking structure. The sleeve is sleeved on the outside of the suction rod, and the sleeve is located in the through hole and can move along the central axis direction of the through hole. The locking structure is used for locking and fixing the sleeve and the base.

4. The vacuum chuck of claim 3, wherein The locking structure includes two fixed nuts, and the two fixed nuts are respectively in threaded connection with the sleeve. The two fixed nuts are located on the two sides of the through hole, and the two fixed nuts are respectively pressed against the surface of the base, so that the sleeve and the base are locked and fixed.

5. The vacuum chuck of claim 3 or 4, wherein One end of the elastic support is pressed against the bottom of the first suction disc, and the other end of the elastic support away from the suction disc is pressed against the end of the sleeve.

6. The vacuum chuck of any one of claims 1 to 4, wherein The height of the first suction disc protruding from the first surface is H1, the height of the second suction disc protruding from the first surface is H2, and 1.0mm≤H1-H2≤2.0mm.

7. The vacuum chuck of any one of claims 1 to 4, wherein The distance between the center of the orthographic projection of the first suction disc on the plane where the first surface is located and the center of the first surface is L1, and the distance between the center of the orthographic projection of the second suction disc on the plane where the first surface is located and the center of the first surface is L2, and the L1 and the L2 satisfy the following relationship: L1>L2.

8. The vacuum chuck of any one of claims 1 to 4, wherein The base is provided with notches on the two sides in the first direction, and each notch contains at least one suction assembly.

9. The vacuum chuck of any one of claims 1 to 4, wherein The base includes a main body and a plurality of sub-departments, and the plurality of sub-departments are distributed on the two sides of the main body in the second direction. Each sub-department is provided with at least one suction assembly.

10. The vacuum chuck of claim 9, wherein The sub-department includes a base plate and a boss. The base plate and the main body are fixedly connected, and the base plate is provided with at least one suction assembly; the boss is located on the side of the suction assembly away from the base; and the height of the boss protruding from the surface of the base plate is less than the height of the first suction disc protruding from the surface of the base plate.

11. A lamination apparatus characterized by, The vacuum adsorption device comprises two vacuum adsorption devices as claimed in any one of claims 1-10, one of the two vacuum adsorption devices is used to transfer the positive electrode sheet to the sheet combining station, and the other of the two vacuum adsorption devices is used to transfer the negative electrode sheet to the sheet combining station; in the two vacuum adsorption devices, at least part of the first adsorption disc is used to adsorb the edge of the electrode sheet. In the sheet combining station, the positive electrode sheet and the negative electrode sheet are located on opposite sides of the diaphragm; the first adsorption disc of the two vacuum adsorption devices correspond one by one and jointly press the positive electrode sheet, the negative electrode sheet and the diaphragm.

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