Laminating device and laminating machine

Abstract

The invention relates to a laminating device and a laminating machine, the laminating device comprises a laminating table, two groups of material pressing mechanisms, two horizontal moving mechanisms and two vertical moving mechanisms, each group of material pressing mechanism comprises two material pressing assemblies located on the left side and the right side of the laminating table, and each horizontal moving mechanism comprises a moving seat and a driving part; the two material pressing assemblies in each group of material pressing mechanisms are arranged on the corresponding moving seats in a sliding manner, and are driven by a driving part to move towards each other or move away from each other; the power output end of each vertical moving mechanism is connected with the corresponding moving base and used for driving the moving base to ascend and descend. Each material pressing assembly comprises a tool rest, a material pressing air cylinder installed on the tool rest and a pressing cutter fixedly connected to the output end of the material pressing air cylinder. Wherein the material pressing assembly is in sliding connection with the corresponding moving seat through the tool rest so as to obtain power input of horizontal face-to-face or back-to-back movement; and the pressing knife is used for being in contact with the battery cell on the lamination table so as to press the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing equipment, and in particular to a lamination device and a lamination machine. Background Art

[0002] Lithium battery stacking technology is a lithium battery manufacturing technology that uses a diaphragm to separate the positive and negative electrodes and stack them in sequence to form a battery cell. Z-type stacking is a relatively important stacking method in lithium batteries. Its basic principle and working process are: use the unwinding mechanism to unwind the diaphragm wound on it, and fold the diaphragm into a Z shape through the reciprocating movement of the stacking table. At the same time, use a manipulator to alternately place the positive and negative electrodes between the folded diaphragms, and the diaphragms separate the positive and negative electrodes; repeat the above process many times to eventually form a lithium battery cell with a certain thickness.

[0003] Usually, in order to improve the stability of the battery cells during the lamination process, a pressing mechanism is also provided on the lamination table, and the semi-finished battery cells folded on the lamination table are pressed by the pressing mechanism to prevent the semi-finished battery cells folded on the lamination table from spreading out when the tension changes due to the lack of fixing force, and the diaphragm and the positive and negative electrode sheets shifting, thereby ensuring the reliability of lamination. However, the pressing force and direction of the pressing mechanism in the prior art are unstable, and the pressing action synchronization of multiple pressing knives is poor, so that the pressing stability and reliability of the battery cells are poor, resulting in poor quality consistency of the finished battery. Summary of the invention

[0004] The first purpose of the present invention is to provide a stacking device to solve the technical problems that the size and direction of the pressing force of the existing battery cell stacking mechanism are unstable, and the pressing action synchronization of multiple pressing knives is poor, thereby the pressing stability and reliability of the battery cell are poor, resulting in poor quality consistency of the finished battery product.

[0005] The laminating device provided by the present invention comprises a laminating platform, two groups of pressing mechanisms, two horizontal moving mechanisms and two vertical moving mechanisms, wherein the two horizontal moving mechanisms are used to drive the two groups of pressing mechanisms to move in the horizontal direction in a one-to-one correspondence; the two vertical moving mechanisms are used to drive the two groups of pressing mechanisms to move in the vertical direction in a one-to-one correspondence;

[0006] Each group of the pressing mechanisms comprises two pressing assemblies located on the left and right sides of the laminating platform, and each of the horizontal moving mechanisms is used to drive the two pressing assemblies in the corresponding pressing mechanism to move toward or away from each other;

[0007] Each of the horizontal moving mechanisms comprises a moving seat and a driving component, and the two pressing assemblies in each group of the pressing mechanisms are slidably arranged on the corresponding moving seat and move towards or away from each other under the drive of the driving component;

[0008] The power output end of each vertical moving mechanism is connected to the corresponding moving seat, and is used to drive the moving seat to move up and down so as to drive the two pressing assemblies arranged on the moving seat to move up and down, thereby pressing the battery cells on the laminating table;

[0009] Each of the pressing assemblies comprises a tool holder, a pressing cylinder mounted on the tool holder, and a pressing knife fixed to the output end of the pressing cylinder; wherein the pressing assembly is slidably connected with the corresponding moving seat through the tool holder to obtain power input for horizontal movement toward or away from each other; the pressing knife is used to contact the battery cell on the lamination table to press it tightly;

[0010] During the lamination process, the lamination device moves back and forth, and the diaphragm is laid on the lamination table during the movement; when the pressing operation is required, the vertical moving mechanism drives the corresponding moving seat to drive the tool holder to move downward, thereby achieving contact between the pressing knife and the battery cell on the lamination table.

[0011] Further, each of the horizontal moving mechanisms comprises a first shaft segment and a second shaft segment pivotally connected to the moving seat, and the driving component is used to drive the first shaft segment and the second shaft segment to rotate;

[0012] Wherein, the first shaft segment and the second shaft segment both extend in the horizontal direction and are both provided with threads; the two pressing assemblies of each group of the pressing mechanism are respectively threadedly connected to the first shaft segment and the second shaft segment of the corresponding horizontal moving mechanism.

[0013] Further, the horizontal moving mechanism includes a first screw rod pivotally connected to the moving seat, the first screw rod extends in the horizontal direction, and two ends of the first screw rod are provided with threads with opposite rotation directions, and the first screw rod has two sections with threads with opposite rotation directions to form the first shaft section and the second shaft section respectively; the driving component includes a first driving member drivingly connected to the first screw rod;

[0014] The horizontal moving mechanism also includes a first transmission member fixedly connected to the tool holder of the corresponding pressing assembly, the first transmission member is threadedly connected to the first screw rod, and is slidably connected to the moving seat.

[0015] Furthermore, the horizontal moving mechanism also includes a first slide rail arranged on the moving seat, the first slide rail is spaced apart from the first screw rod and extends in the horizontal direction, and the first transmission member is slidably connected to the first slide rail.

[0016] Further, the threads on the first shaft segment and the second shaft segment have the same rotation direction, and the driving component drives the first shaft segment and the second shaft segment to rotate in opposite directions.

[0017] Furthermore, it also includes a mounting seat, and the stacking platform is mounted on the mounting seat.

[0018] Further, the vertical movement mechanism comprises a second driving member and a second screw rod provided on the mounting seat, wherein the second screw rod extends in a vertical direction, and the second driving member is drivingly connected to the second screw rod;

[0019] The moving seat is slidably connected to the mounting seat, and the vertical moving mechanism further includes a second transmission member fixedly connected to the moving seat, and the second transmission member is threadedly connected to the second screw rod.

[0020] Furthermore, the vertical moving mechanism also includes a second slide rail arranged on the mounting seat, the second slide rail is spaced apart from the second screw rod and extends in the vertical direction, and the moving seat is slidably connected to the second slide rail.

[0021] Furthermore, it also includes a lifting mechanism for lifting the stacking table, and the lifting mechanism is installed on the mounting seat.

[0022] Furthermore, the pressing end of the pressing knife is in the shape of a sheet; when the pressing operation is required, under the action of the vertical moving mechanism, the moving seat drives the knife holder to move downward, so that the pressing knife is in contact with the battery cell on the lamination table;

[0023] When the pressing knife contacts the battery cell on the lamination table, the pressing cylinder always outputs a constant pulling force to the pressing knife, so that the pressing knife applies a constant downward pressure to the battery cell.

[0024] The beneficial effects brought by the lamination device of the present invention are:

[0025] When the stacking device is working, in each group of pressing mechanisms, the pressing assemblies located on both sides of the stacking table move away from each other under the drive of the driving component in the horizontal moving mechanism, so that the pressing end of the pressing assembly is moved away from the battery cell, thereby achieving avoidance relative to the battery cell; then, the vertical moving mechanism is used to raise the pressing assembly by a certain distance, so that the pressing assembly is located above the battery cell; thereafter, the driving component in the horizontal moving mechanism is used again to drive the pressing assemblies on both sides to move toward each other until they are in the pressing position where they can press the battery cell on the stacking table after they are lowered; finally, the vertical moving mechanism is used again to drive the pressing assembly to descend to press the battery cell on the stacking table.

[0026] After the diaphragm spreads a new layer, the pole piece is put in, and another set of pressing mechanisms arranged opposite to the aforementioned pressing mechanisms in the front-to-back direction loosens the battery cell, and after the same action process as the above-mentioned pressing mechanism, the battery cell on this side is pressed; then, the diaphragm continues to spread, the pole piece continues to be put in, and the pressing mechanism on the other side continues to press the corresponding side of the battery cell according to the above-mentioned action process. The above-mentioned actions are repeated continuously, and the pressing operation in the process of stacking the battery cells is realized during the multiple folding of the diaphragm and the multiple placement of the positive and negative pole pieces. Among them, the pressing mechanisms that press on the battery cell each time can be one group or multiple groups.

[0027] In the lamination device, the vertical moving mechanism is used to drive the pressing assemblies on both sides of the lamination platform to rise or fall, so that the pressing knives of the pressing assemblies are separated from or in contact with the battery cells on the lamination platform. When the vertical moving mechanism drives the pressing assemblies on both sides of the lamination platform to fall until the pressing knives press the battery cells on the lamination platform, the pressure applied by the pressing knives to the battery cells is provided by the pressing cylinder. Furthermore, two pressing assemblies in a group of pressing mechanisms are installed on the same moving seat, and the driving components of a horizontal moving mechanism are used to drive the two pressing assemblies on the moving seat to move toward or away from each other, and a vertical moving mechanism is used to drive the moving seat to rise and fall, thereby driving the two pressing assemblies on the moving seat to rise and fall synchronously, thereby greatly improving the consistency of the pressing action of the two pressing knives of the same group of pressing assemblies (i.e., the movement of the two pressing knives toward or away from each other and the lifting and lowering movement). Therefore, by setting up a pressing cylinder, it is helpful to control the pressure size and direction of the pressing knife on the battery cell each time to be more consistent, and avoid the unstable situation that the size and direction of the pressure of the pressing knife on the battery cell each time; by using the driving parts of the same horizontal moving mechanism to drive two pressing components in a group of pressing mechanisms to move away from or towards each other, and using the same vertical moving mechanism to drive the two pressing components in a group of pressing mechanisms to rise and fall synchronously, it is avoided that the pressing actions of the two pressing knives in the same group of pressing mechanisms are inconsistent, which greatly improves the consistency, stability and reliability of the pressing of the battery cells, and is beneficial to improving the quality consistency of the finished battery products.

[0028] The second object of the present invention is to provide a stacking machine to solve the technical problem that the existing stacking machine cannot meet the stacking operation requirements of various types of battery cells.

[0029] The laminating machine provided by the present invention comprises the laminating device mentioned above.

[0030] The beneficial effects brought by the laminating machine of the present invention are:

[0031] By arranging the above-mentioned lamination device in the lamination machine, the lamination machine accordingly has all the advantages of the above-mentioned lamination device, which will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the main structure of a lamination device provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the main structure of the lamination device provided in an embodiment of the present invention when the lamination platform and the lifting mechanism are not shown;

[0035] Figure 3 A schematic diagram of a top view of the structure of the laminating device provided in an embodiment of the present invention when the laminating platform and the lifting mechanism are not shown;

[0036] Figure 4 for Figure 1 A partial enlarged view of the middle A;

[0037] Figure 5 A schematic diagram of the movement paths of the pressing blade and the battery cell when the lamination device provided in an embodiment of the present invention performs lamination once.

[0038] Reference numerals:

[0039] 100- stacking table; 200- pressing assembly; 300- horizontal moving mechanism; 400- vertical moving mechanism; 500- lifting mechanism; 600- mounting seat; 700- battery cell;

[0040] 210- knife pressing; 220- knife rest; 230- press cylinder;

[0041] 310-first slide rail; 320-first driving member; 330-first screw rod; 340-first transmission member; 350-movable seat; 360-first transmission assembly;

[0042] 331-first shaft section; 332-second shaft section;

[0043] 410 - second slide rail; 420 - second driving member; 430 - second screw rod; 440 - second transmission member; 450 - mounting plate; 460 - second transmission assembly;

[0044] 510-lifting screw nut; 520-lifting screw rod; 530-sleeve; 540-bearing seat; 550-guide rail; 560-support frame;

[0045] 710-diaphragm; 720-pole piece;

[0046] S1-the first rising distance of the press knife;

[0047] S2-the second rising distance of the knife press;

[0048] H- The distance the stacking platform descends each time. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "vertical" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Figure 1 This is a schematic diagram of the main structure of the lamination device provided in this embodiment, Figure 2 A schematic diagram of the main structure of the lamination device provided in this embodiment when the lamination platform 100 and the lifting mechanism 500 are not shown, Figure 3 The schematic diagram of the top view of the stacking device provided in this embodiment when the stacking platform 100 and the lifting mechanism 500 are not shown. Figures 1 to 3 As shown, this embodiment provides a lamination device, including a lamination platform 100, a material pressing mechanism, a horizontal moving mechanism 300 and a vertical moving mechanism 400. The lamination platform 100 is installed on a mounting seat 600.

[0053] For details, please refer to Figures 1 to 3The pressing mechanism includes pressing assemblies 200 located on the left and right sides of the stacking table 100, and the horizontal moving mechanism 300 includes a moving seat 350, a first shaft segment 331 and a second shaft segment 332 both pivotally connected to the moving seat 350, and a driving component for driving the first shaft segment 331 and the second shaft segment 332 to rotate, wherein the first shaft segment 331 and the second shaft segment 332 both extend in the horizontal direction and are both provided with threads, and each pressing assembly 200 is respectively threadedly connected to the first shaft segment 331 and the second shaft segment 332, and is slidably connected to the moving seat 350 to move toward or away from each other under the drive of the driving component.

[0054] Please continue to refer to Figures 1 to 3 The power output end of the vertical moving mechanism 400 is connected to the moving seat 350, which is used to drive the moving seat 350 to move up and down to drive the pressing assembly 200 to move up and down, so as to press the battery cells 700 on the lamination table 100. There are two groups of pressing mechanisms, and specifically, the two groups of pressing mechanisms are arranged at intervals along the front-to-back direction. Among them, the number of horizontal moving mechanisms 300 is the same as the number of pressing mechanisms, which are used to drive each group of pressing mechanisms to move in the horizontal direction respectively; the number of vertical moving mechanisms 400 is also the same as the number of pressing mechanisms, which are used to drive each group of pressing mechanisms to move in the vertical direction respectively.

[0055] When the laminating device is working, in a group of pressing mechanisms, the first shaft segment 331 and the second shaft segment 332 rotate under the drive of the driving component in the horizontal moving mechanism 300. Under the spiral transmission of the first shaft segment 331 / the second shaft segment 332 and the pressing assembly 200 and the sliding limit action of the moving seat 350 on the pressing assembly 200, the rotational motion of the first shaft segment 331 and the second shaft segment 332 is converted into a linear feeding motion of the pressing assemblies 200 on both sides, so that the pressing assemblies 200 located on both sides of the laminating table 100 move in opposite directions, so that the pressing end of the pressing assembly 200 is moved away from the battery cell 700, thereby realizing relative to the battery cell 700. 00; then, the vertical moving mechanism 400 is used to raise the pressing assembly 200 by a certain distance so that the pressing assembly 200 is located above the battery cell 700; thereafter, the driving component in the horizontal moving mechanism 300 is used again to drive the first shaft segment 331 and the second shaft segment 332 to rotate respectively in directions opposite to the above-mentioned rotation directions, so that the pressing assemblies 200 on both sides move toward each other until they are in the pressing position where they can press the battery cell 700 on the laminating table 100 after they are lowered; finally, the vertical moving mechanism 400 is used again to drive the pressing assembly 200 to descend to press the battery cell 700 on the laminating table 100.

[0056] After the diaphragm 710 spreads a new layer, the electrode 720 is placed in, and another set of pressing mechanisms arranged opposite to the aforementioned pressing mechanisms in the front-to-back direction loosens the battery cell 700, and after the same action process as the above-mentioned pressing mechanisms, the battery cell on this side is pressed tightly; then, the diaphragm 710 continues to be spread, the electrode 720 continues to be placed in, and the pressing mechanism on the other side continues to press the corresponding side of the battery cell 700 according to the above-mentioned action process, and the above-mentioned actions are repeated continuously. During the multiple folding of the diaphragm 710 and the multiple placement of the electrode 720, the pressing operation of the battery cell 700 is realized during the stacking process.

[0057] In the stacking device, the spiral transmission action of the horizontal moving mechanism 300 is utilized to realize the linear feeding of the pressing assemblies 200 on both sides of the stacking table 100. Not only is the feeding stroke controllable, but the feeding stroke is also relatively long, thereby expanding the application scope of the stacking device, enabling it to meet the stacking requirements of various types of battery cells 700, greatly improving the degree of commonality, and reducing the stacking cost of the finished battery cells to a certain extent.

[0058] It should be noted that, in this embodiment, the "horizontal direction" refers to: the moving direction of each pressing assembly 200 in each group of pressing mechanisms in the horizontal plane, including the direction in which the pressing assemblies 200 move toward each other and move away from each other; the "front-back direction" refers to: the direction perpendicular to the moving direction of the pressing assembly 200 in the horizontal plane, that is: Figure 3 In addition, “the left and right sides of the laminating table 100 ” refers to: the two sides of the laminating table 100 along the moving direction of the pressing assembly 200 .

[0059] It should also be noted that when the number of pressing mechanisms is greater than two groups, there can be more than two groups of pressing mechanisms pressing on the battery cell each time. This arrangement allows the battery cell 700 to be pressed at the same time near the middle of the battery cell 700 during the lamination process. The double pressing form prevents the battery cell 700 from becoming loose due to the failure of one group of pressing mechanisms, thereby ensuring the working reliability of the lamination device of this embodiment.

[0060] Please continue to refer to Figure 1 In this embodiment, the lamination device may further include a mounting seat 600, wherein the lamination table 100 is mounted on the mounting seat 600. Such a setting realizes the reliable installation of the lamination table 100, provides a stable working environment for the lamination of the battery cell 700, and ensures the reliability of the lamination. Moreover, such a setting also realizes the modularization of the lamination device of this embodiment, which is convenient for its assembly and fixation in the lamination machine.

[0061] Please continue to refer to Figures 1 to 3In this embodiment, the pressing assembly 200 includes a tool holder 220, a pressing cylinder 230 installed on the tool holder 220, and a pressing knife 210 fixedly connected to the output end of the pressing cylinder 230, wherein the pressing assembly 200 is threadedly connected to the first shaft segment 331 / the second shaft segment 332 through the tool holder 220, and is slidingly connected to the movable seat 350 through the tool holder 220, and the pressing knife 210 is used to contact the battery cell 700 on the lamination table 100 to press it.

[0062] When the pressing operation is required, the moving seat 350 is driven to drive the knife holder 220 to move downward under the action of the vertical moving mechanism 400, so as to achieve the contact between the pressing knife 210 and the battery cell 700 on the lamination table 100. The pressing cylinder 230 works and always outputs a constant pulling force to the pressing knife 210, so that the pressing knife 210 applies a constant downward pressure to the battery cell 700 to complete the pressing action on the battery cell 700.

[0063] Specifically, in this embodiment, the pressing cylinder 230 may be a slide cylinder.

[0064] By setting the pressing cylinder 230, the pressing knife 210 can apply constant pressure to the battery cell 700 each time. Moreover, the slide cylinder is used as the setting form of the pressing cylinder 230 to apply pressure to the battery cell 700. The vertical guiding function of the slide is used to ensure that the pulling force provided by the pressing cylinder 230 to the pressing knife 210 can always be in the vertical direction without shaking, thereby ensuring the consistency of the battery cell 700 after lamination, thereby improving the consistency of the finished lithium battery to a certain extent. In addition, this pressing structure has a high pressing reliability, thereby ensuring the smooth lamination operation.

[0065] It should be noted that, in this embodiment, the pressing assembly 200 can be in the form of applying pressure to the battery cell 700 through the pressing cylinder 230, but it is not limited to this, and other settings can also be adopted, such as: a tension spring is set between the knife holder 220 and the pressing knife 210. When the pressing knife 210 contacts the battery cell 700 on the lamination table 100, the tension spring is in a stretched state, and under the action of its elastic restoring force, the battery cell 700 on the lamination table 100 is pressed. Therefore, as long as this setting form of the pressing assembly 200 is used, the pressing operation of the battery cell 700 on the lamination table 100 can be achieved.

[0066] Please continue to refer to Figures 1 to 3 In this embodiment, the pressing end of the pressing knife 210 is in a sheet shape and has a rounded corner for preventing the battery cell 700 from being scratched.

[0067] By setting the pressing knife 210 in a sheet shape, the contact area between the pressing knife 210 and the battery cell 700 is increased, and the local warping of the battery cell 700 is prevented, thereby improving the lamination effect. In addition, when the diaphragm 710 is folded again, the setting form of the sheet pressing knife 210 reduces the height difference between the pole piece 720 and the diaphragm 710, thereby reducing the situation where the diaphragm 710 is too long after folding due to the height of the pressing knife 210, which not only avoids the waste of the diaphragm 710 material, but also ensures the flatness of the battery cell 700 between the two adjacent pole pieces 720 after lamination, further improving the lamination effect.

[0068] In addition, by setting the pressing end of the pressing knife 210 to a rounded form, not only is damage to the diaphragm 710 or the pole piece 720 prevented during the withdrawal of the pressing knife 210, but the resistance during the withdrawal of the pressing knife 210 is also reduced, making it easier to quickly withdraw the pressing knife 210, thereby improving the working efficiency of the lamination device of this embodiment to a certain extent.

[0069] Please continue to refer to Figures 1 to 3 In this embodiment, the horizontal moving mechanism 300 may include a first screw rod 330 pivotally connected to the moving seat 350, the first screw rod 330 extends in the horizontal direction, and two ends thereof are provided with threads of opposite hand directions, wherein the first screw rod 330 has two sections of threads of opposite hand directions to form a first shaft section 331 and a second shaft section 332 respectively. The driving component includes a first driving member 320 that is transmission-connected to the first screw rod 330. In addition, the horizontal moving mechanism 300 also includes a first transmission member 340 that is fixedly connected to the tool holder 220, wherein the first transmission member 340 connected to each tool holder 220 is threadedly connected to the two ends of the first screw rod 330, and is slidably connected to the moving seat 350.

[0070] When the first driving member 320 drives the first screw rod 330 to rotate, under the spiral transmission of the first transmission member 340 and the first screw rod 330 and the sliding limiting action of the moving seat 350 on the first transmission member 340, the spiral transmission between the first transmission member 340 and the first screw rod 330 is converted into a linear feed motion of the first transmission member 340, so that the tool holders 220 arranged at both ends of the first screw rod 330 move toward or away from each other at the same time, so as to achieve the simultaneous approach or distance between the two relative to the stacking table 100.

[0071] Such a configuration achieves the purpose of simultaneously driving two pressing assemblies 200 by one driving member, and reduces the configuration cost of the horizontal moving mechanism 300. Moreover, such a transmission form has a stable transmission, reduces the adverse effects on the lamination process, and further improves the working reliability of the lamination device of this embodiment.

[0072] Please continue to refer to Figure 1 and Figure 2In this embodiment, the horizontal moving mechanism 300 may further include a first slide rail 310 disposed on the moving seat 350 . Specifically, the first slide rail 310 is spaced apart from the first screw rod 330 and extends in the horizontal direction, and the first transmission member 340 is slidably connected to the first slide rail 310 .

[0073] When the first driving member 320 drives the pressing assemblies 200 on both sides to move toward or away from each other in the horizontal direction, the first transmission member 340 slides on the first slide rail 310 .

[0074] By providing the first slide rail 310, the first transmission member 340 is slidably connected to the movable seat 350, thereby achieving horizontal movement of the tool holder 220. In addition, the first slide rail 310 is simple in structure, easy to implement, and low in cost.

[0075] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the horizontal moving mechanism 300 may further include a first transmission assembly 360 , wherein the first driving member 320 is transmission-connected to the first screw rod 330 via the first transmission assembly 360 .

[0076] The setting of the first transmission assembly 360 realizes the power transmission from the first driving member 320 to the first screw rod 330, which not only meets the various installation requirements of the first driving member 320, but also makes the structure of the lamination device of this embodiment more compact and saves floor space. Moreover, by selecting the first transmission assembly 360, the purpose of speed reduction and torque increase can be achieved to ensure reliable driving of the first screw rod 330.

[0077] Specifically, in this embodiment, the first driving member 320 may be a servo motor, and the first transmission assembly 360 may be a belt transmission assembly. The belt transmission assembly includes a driving wheel fixedly connected to the output shaft of the servo motor, a driven wheel fixedly sleeved on the first screw rod 330, and a transmission belt sleeved on the driving wheel and the driven wheel. When the output shaft of the servo motor rotates, the driving wheel is driven to rotate, and then the power is output to the driven wheel through the transmission belt, and finally the first screw rod 330 is driven.

[0078] The form of using a belt drive assembly for power transmission is not only simple in structure and easy to assemble, but also requires almost no lubrication, thereby reducing the contamination of the lubricant to the diaphragm 710 and the pole piece 720.

[0079] It should be noted that, in the present embodiment, the first shaft segment 331 and the second shaft segment 332 in the horizontal moving mechanism 300 can be the above-mentioned form of setting threads with opposite rotation directions at both ends of a first screw rod 330, but it is not limited to this, and other settings can also be adopted, such as: the first shaft segment 331 and the second shaft segment 332 are two independent shaft segments, and the two have threads with the same rotation direction. The driving component drives the first shaft segment 331 and the second shaft segment 332 to rotate in opposite directions, thereby realizing the toward or away movement of the pressing assemblies 200 on both sides of the stacking table 100.

[0080] Specifically, when the threads on the first shaft section 331 and the second shaft section 332 have the same rotation direction, the first shaft section 331 and the second shaft section 332 can be coaxially arranged, and the two can be spaced apart along the axial direction. At this time, the driving component can include a first bevel gear fixedly sleeved on the first shaft section 331, a second bevel gear fixedly sleeved on the second shaft section 332, a power bevel gear meshed with the first bevel gear and the second bevel gear at the same time, and a motor for driving the above-mentioned power bevel gear to rotate, and the motor is installed on the moving seat 350. When the motor rotates, the power bevel gear rotates, thereby driving the first bevel gear and the second bevel gear meshed with it to rotate, thereby realizing the reverse rotation of the first shaft section 331 and the second shaft section 332.

[0081] Of course, the driving of the first shaft segment 331 and the second shaft segment 332 can also be achieved through other driving components. As long as the setting of such driving components can realize the rotation of the first shaft segment 331 and the second shaft segment 332 in opposite directions, this embodiment does not limit the specific form of the driving components.

[0082] Please continue to refer to Figures 1 to 3 In this embodiment, the vertical moving mechanism 400 may include a second driving member 420 and a second screw rod 430 disposed on the mounting seat 600, wherein the second driving member 420 is transmission-connected to the second screw rod 430, and the second screw rod 430 extends in the vertical direction. In addition, the moving seat 350 is slidably connected to the mounting seat 600, and the vertical moving mechanism 400 further includes a second transmission member 440 fixedly connected to the moving seat 350, and the second transmission member 440 is threadedly connected to the second screw rod 430.

[0083] When the second driving member 420 drives the second screw rod 430 to rotate, under the spiral transmission of the second transmission member 440 and the second screw rod 430 and the sliding limiting action of the mounting seat 600 on the second transmission member 440, the spiral transmission between the second transmission member 440 and the second screw rod 430 is converted into a linear feeding motion of the second transmission member 440, thereby realizing the rising or falling motion of the movable seat 350, and further realizing the rising or falling of the pressing assembly 200.

[0084] This transmission form can adjust the ascending stroke or descending stroke of the pressing assembly 200 according to actual needs, thereby meeting the lamination requirements for various types of battery cells 700. Moreover, this transmission form is stable and reliable, reducing vibration and noise during the operation of the lamination device of this embodiment.

[0085] Specifically, the second driving member 420 is connected to the mounting seat 600 via the mounting plate 450 .

[0086] Please continue to refer to Figures 1 to 3 In this embodiment, the vertical moving mechanism 400 may further include a second slide rail 410 disposed on the mounting seat 600 . Specifically, the second slide rail 410 is spaced apart from the second screw rod 430 and extends in the vertical direction, and the moving seat 350 is slidably connected to the second slide rail 410 .

[0087] When the second driving member 420 drives the moving base 350 to rise or fall, the moving base 350 slides on the second slide rail 410 .

[0088] By setting the second slide rail 410, the sliding connection of the movable seat 350 relative to the mounting seat 600 is realized, that is, the sliding connection of the second transmission member 440 relative to the mounting seat 600 is realized, assisted by the spiral transmission of the second screw rod 430 and the second transmission member 440, thereby realizing the movement of the movable seat 350 in the vertical direction.

[0089] Please continue to refer to Figure 1 and Figure 2 In this embodiment, there may be two second slide rails 410, and the two second slide rails 410 are arranged at intervals along the length direction (left-right direction in the figure) of the moving seat 350. Such an arrangement realizes the simultaneous sliding connection between the two ends of the moving seat 350 and the mounting seat 600, prevents the stress concentration of the second slide rail 410 on one side caused by the suspension of one end and the jamming phenomenon caused by the large overturning force on the moving seat 350, thereby ensuring the smoothness of the lifting and lowering of the moving seat 350.

[0090] Specifically, a slider matched with the second slide rail 410 can be fixedly provided on the movable seat 350 , and the sliding connection of the movable seat 350 relative to the mounting seat 600 can be achieved by utilizing the sliding cooperation between the slider and the second slide rail 410 .

[0091] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the vertical moving mechanism 400 may further include a second transmission assembly 460 , wherein the second driving member 420 is transmission-connected to the second screw rod 430 via the second transmission assembly 460 .

[0092] The second transmission assembly 460 is provided to realize the power transmission from the second driving member 420 to the second screw rod 430, which not only meets the various installation requirements of the second driving member 420, but also makes the structure of the lamination device of this embodiment more compact and saves floor space. Moreover, by selecting the second transmission assembly 460, the purpose of speed reduction and torque increase can be achieved to ensure reliable driving of the second screw rod 430.

[0093] Specifically, in this embodiment, the second driving member 420 may be a servo motor, and the second transmission assembly 460 may be a belt transmission assembly. The belt transmission assembly includes a driving wheel fixedly connected to the output shaft of the servo motor, a driven wheel fixedly sleeved on the second screw rod 430, and a transmission belt sleeved on the driving wheel and the driven wheel. When the output shaft of the servo motor rotates, the driving wheel is driven to rotate, and then the power is output to the driven wheel through the transmission belt, and finally the second screw rod 430 is driven.

[0094] The form of using a belt drive assembly for power transmission is not only simple in structure and easy to assemble, but also requires almost no lubrication, thereby reducing the contamination of the diaphragm 710 and the pole piece 720 caused by the lubricant.

[0095] Please continue to refer to Figure 1 In this embodiment, the lamination device may further include a lifting mechanism 500 for lifting and lowering the lamination platform 100 , wherein the lifting mechanism 500 is installed on a mounting seat 600 .

[0096] During the lamination process of the lamination device, the lifting mechanism 500 can drive the lamination table 100 to descend a certain distance each time the diaphragm 710 is folded, so that the highest surface on the lamination table 100 on which the battery cells 700 are placed can always be in the same plane position, thereby ensuring the reliability and consistency of the pressing of the battery cells 700 by the pressing assembly 200, and further ensuring the lamination effect.

[0097] It should be noted that, in the present embodiment, “the highest surface on the stacking table 100 where the battery cells 700 are placed” refers to: after the battery cells 700 are placed on the stacking table 100, the highest surface of the two as a whole, that is, the surface where the top layer of the battery cells 700 is located; and “the same plane position” means: the same plane position as the surface position of the stacking table 100 when no battery cells 700 are placed.

[0098] Figure 4 for Figure 1 A partial enlarged view of the middle A. Please continue to refer to Figure 1 , and combined with Figure 4In this embodiment, the lifting mechanism 500 includes a bearing seat 540, a lifting nut 510, a lifting screw rod 520, a sleeve 530 and a support frame 560. Specifically, the bearing seat 540 is fixedly connected to the mounting seat 600, and guide rails 550 are arranged on both sides of the bearing seat 540. The support frame 560 is slidably connected to the guide rails 550, and the stacking table 100 is fixedly set on the support frame 560; the lifting nut 510 is threadedly connected to the lifting screw rod 520, wherein the lifting screw rod 520 is driven to rotate by a lifting driving member (not shown in the figure); the sleeve 530 is sleeved on the lifting screw rod 520, and its lower end is fixedly connected to the lifting nut 510, and its upper end is fixedly connected to the support frame 560.

[0099] When the stacking table 100 needs to be raised or lowered, the lifting drive is started to rotate the lifting screw rod 520. Under the spiral transmission action of the lifting screw rod 520 and the lifting nut 510 and the sliding limit action of the guide rail 550, the lifting nut 510 rises or falls. Since the length of the sleeve 530 between the lifting nut 510 and the support frame 560 is fixed, during the movement of the lifting nut 510, the sleeve 530 drives the support frame 560 to rise or fall, thereby realizing the lifting and lowering of the stacking table 100.

[0100] Figure 5 This is a schematic diagram of the movement path of the pressing knife 210 and the battery cell 700 when the lamination device provided in this embodiment is laminated once. Figure 3 , and combined with Figure 5, when the diaphragm 710 is spread along the laminating table 100 from n to m, the transport mechanism places the pole piece 720 on the diaphragm 710; after the pole piece 720 is in place, the vertical moving mechanism 400 drives the two pressing knives 210 on the m side to rise (the path of the pressing knife 210 is a) to slightly move away from the pole piece 720 below it. Specifically, the rising stroke of the pressing knife 210 can be S1; the horizontal moving mechanism 300 drives the two pressing knives 210 on the m side to move in opposite directions (the path of the pressing knife 210 is b) to pull the pressing knife 210 out of the battery cell 700; the lifting mechanism 500 drives the laminating table 100 to descend a certain distance (the path of the battery cell 700 is f). Specifically, the descending distance of the laminating table 100 can be H to ensure that after the next laminating action is completed, there is a battery cell placed. The highest surface of the stacking table 100 of 700 is always on the same plane; the vertical moving mechanism 400 drives the two pressing knives 210 on the m side to rise again (the path of the pressing knife 210 is c). Specifically, the rising stroke of the pressing knife 210 this time can be S2 to ensure that the pressing end of the pressing knife 210 is sufficiently higher than the highest surface of the stacking table 100 where the battery cell 700 is placed, so as to achieve avoidance; the horizontal moving mechanism 300 is activated again to make the two pressing knives 210 on the m side move toward each other (the path of the pressing knife 210 is d), so that the pressing knife 210 reaches the pressing position for pressing the battery cell 700; the vertical moving mechanism 400 is activated again to drive the two pressing knives 210 on the m side to descend (the path of the pressing knife 210 is e), and press the battery cell 700 that has completed a stacking operation.

[0101] During the movement of the m-side pressing knife 210, the n-side pressing knife 210 remains stationary, and under the action of the pressing cylinder 230, the n-side pressing cylinder 230 applies a constant pulling force to the pressing knife 210, so that the pressing knife 210 applies a constant pressure to the battery cell 700, so as to reliably press the battery cell 700 on the stacking table 100. When the m-side pressing knife 210 completes the above-mentioned pressing action, the diaphragm 710 spreads a new layer from the m-side to the n-side along the stacking table 100, and then the transport mechanism places the pole piece 720 with the opposite polarity to the aforementioned pole piece 720 on the diaphragm 710, and the n-side pressing knife 210 repeats the above-mentioned m-side pressing knife 210 working process, and presses the end of the battery cell 700 located on the n-side again. The m-side pressing knife 210 and the n-side pressing knife 210 perform such a cyclic reciprocating action to finally realize the stacking operation of the battery cell 700.

[0102] Specifically, when the pressing knife 210 descends along the path e, its descending stroke is the sum of S1 and S2, wherein S1 may be less than S2. In this embodiment, the main purpose of the ascending stroke S1 of the pressing knife 210 is to prevent the pressing knife 210 from scratching the battery cell 700 during the withdrawal process; the main purpose of the ascending stroke S2 ​​of the pressing knife 210 is to avoid the battery cell 700 on the lamination table 100.

[0103] It should be noted that, in this embodiment, “one lamination” means that the diaphragm 710 is folded once from the m side to the n side (or from the n side to the m side), and a pole piece 720 is placed on the diaphragm 710. In other words, H is equal to the sum of the thickness of a diaphragm 710 and a pole piece 720.

[0104] It should also be noted that, in this embodiment, the pressing blades 210 on the m side and the n side can be pressed on the ends of the battery cell 700 during the process of pressing the battery cell 700. Such a setting ensures that the diaphragm 710 to be folded will not be pulled by the next folding action, and at the same time, it also ensures that the battery cell 700 that has been folded will not be loose and deformed, further improving the lamination effect of the lamination device of this embodiment.

[0105] This embodiment also provides a laminating machine, comprising the laminating device mentioned above.

[0106] By arranging the above-mentioned lamination device in the lamination machine, the lamination machine accordingly has all the advantages of the above-mentioned lamination device, which will not be described one by one here.

[0107] Specifically, the stacking machine may further include a control module, wherein the control module is electrically connected to the first drive member 320, the second drive member 420 and the lifting drive member. Such a configuration realizes automatic stacking of the stacking machine, thereby improving the stacking efficiency of the battery cell 700.

[0108] In addition, the laminating machine may further include a transporting mechanism for transporting the pole piece 720 and an unwinding mechanism for unwinding the diaphragm 710 , wherein the driving components of the transporting mechanism and the unwinding mechanism may both be electrically connected to the control module.

[0109] During the stacking process, the stacking device may be fixed while the unwinding mechanism drives the diaphragm 710 to move back and forth, thereby realizing the stacking operation on the stacking table 100; alternatively, the stacking device may move back and forth while the unwinding mechanism is fixed, and the stacking table 100 receives the diaphragm released by the unwinding mechanism to realize the stacking operation.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lamination device, characterized in that: It comprises a laminating table (100), two groups of pressing mechanisms, two horizontal moving mechanisms (300) and two vertical moving mechanisms (400), wherein the two horizontal moving mechanisms (300) are used to drive the two groups of pressing mechanisms to move in the horizontal direction in a one-to-one correspondence; and the two vertical moving mechanisms (400) are used to drive the two groups of pressing mechanisms to move in the vertical direction in a one-to-one correspondence; Each group of the pressing mechanisms comprises two pressing assemblies (200) located on the left and right sides of the laminating platform (100), and each of the horizontal moving mechanisms (300) is used to drive the two pressing assemblies (200) in the corresponding pressing mechanism to move toward or away from each other; Each of the horizontal moving mechanisms (300) comprises a moving seat (350) and a driving component, and the two pressing assemblies (200) in each group of the pressing mechanisms are slidably arranged on the corresponding moving seat (350) and move towards or away from each other under the drive of the driving component; The power output end of each vertical moving mechanism (400) is connected to the corresponding moving seat (350) and is used to drive the moving seat (350) to move up and down so as to drive the two pressing assemblies (200) arranged on the moving seat (350) to move up and down, thereby pressing the battery cells (700) on the lamination table (100); Each of the pressing assemblies (200) comprises a tool holder (220), a pressing cylinder (230) mounted on the tool holder (220), and a pressing knife (210) fixedly connected to the output end of the pressing cylinder (230); wherein the pressing assembly (200) is slidably connected to the corresponding movable seat (350) through the tool holder (220) to obtain power input for horizontal movement toward or away from each other; the pressing knife (210) is used to contact the battery cell (700) on the lamination table (100) to press it tightly; During the lamination process, the lamination device moves back and forth, and the diaphragm is laid on the lamination table (100) during the movement; when a pressing operation is required, the vertical moving mechanism (400) drives the corresponding moving seat (350) to drive the knife holder (220) to move downward, thereby achieving contact between the pressing knife (210) and the battery cell (700) on the lamination table (100).

2. The lamination device according to claim 1, characterized in that: Each of the horizontal moving mechanisms (300) comprises a first shaft section (331) and a second shaft section (332) pivotally connected to the moving seat (350), and the driving component is used to drive the first shaft section (331) and the second shaft section (332) to rotate; Wherein, the first shaft section (331) and the second shaft section (332) both extend in the horizontal direction and are both provided with threads; the two pressing assemblies (200) of each group of the pressing mechanism are respectively threadedly connected to the first shaft section (331) and the second shaft section (332) of the corresponding horizontal moving mechanism (300).

3. The lamination device according to claim 2, characterized in that: The horizontal moving mechanism (300) comprises a first screw rod (330) pivotally connected to the moving seat (350), the first screw rod (330) extending in the horizontal direction, and having two ends provided with threads of opposite rotation directions, the first screw rod (330) having two sections of threads of opposite rotation directions respectively forming the first shaft section (331) and the second shaft section (332); the driving component comprises a first driving member (320) drivingly connected to the first screw rod (330); The horizontal moving mechanism (300) further comprises a first transmission member (340) fixedly connected to the tool holder (220) of the corresponding pressing assembly (200); the first transmission member (340) is threadedly connected to the first screw rod (330) and is slidably connected to the moving seat (350).

4. The lamination device according to claim 3, characterized in that: The horizontal moving mechanism (300) further comprises a first slide rail (310) arranged on the moving seat (350), the first slide rail (310) being spaced apart from the first screw rod (330) and extending in a horizontal direction, and the first transmission member (340) being slidably connected to the first slide rail (310).

5. The lamination device according to claim 2, characterized in that: The threads on the first shaft section (331) and the second shaft section (332) have the same rotation direction, and the driving component drives the first shaft section (331) and the second shaft section (332) to rotate in opposite directions.

6. The lamination device according to any one of claims 1 to 5, characterized in that: It also includes a mounting seat (600), and the lamination platform (100) is mounted on the mounting seat (600).

7. The lamination device according to claim 6, characterized in that: The vertical moving mechanism (400) comprises a second driving member (420) and a second screw rod (430) which are arranged on the mounting seat (600), wherein the second screw rod (430) extends in a vertical direction, and the second driving member (420) is transmission-connected to the second screw rod (430); The movable seat (350) is slidably connected to the mounting seat (600), and the vertical moving mechanism (400) further comprises a second transmission member (440) fixedly connected to the movable seat (350), and the second transmission member (440) is threadedly connected to the second screw rod (430).

8. The lamination device according to claim 7, characterized in that: The vertical moving mechanism (400) further comprises a second slide rail (410) arranged on the mounting seat (600), the second slide rail (410) being spaced apart from the second screw rod (430) and extending in the vertical direction, and the moving seat (350) being slidably connected to the second slide rail (410).

9. The lamination device according to claim 6, characterized in that: It also includes a lifting mechanism (500) for lifting and lowering the lamination platform (100), and the lifting mechanism (500) is installed on the mounting seat (600).

10. The lamination device according to claim 1, characterized in that: The pressing end of the pressing knife is in the shape of a sheet; when a pressing operation is required, under the action of the vertical moving mechanism (400), the moving seat (350) drives the knife holder (220) to move downward, thereby achieving contact between the pressing knife (210) and the battery cell (700) on the lamination table (100); When the pressing knife (210) contacts the battery cell (700) on the lamination table (100), the pressing cylinder (230) always outputs a constant pulling force to the pressing knife (210), so that the pressing knife (210) applies a constant downward pressure to the battery cell (700).

11. A laminating machine, characterized in that: The invention comprises a lamination device as described in any one of claims 1 to 10.

12. The laminating machine according to claim 11, characterized in that: The laminating machine comprises a transport mechanism, and the transport mechanism is used to place the pole piece on the diaphragm laid on the laminating table (100).

13. The laminating machine according to claim 11, characterized in that The laminating machine further comprises an unwinding mechanism, and the unwinding mechanism is used for unwinding the diaphragm toward the laminating platform (100).

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