Lamination device

Abstract

The utility model provides a lamination device. The lamination device comprises at least two knife pressing units, the driving unit comprises an annular conveying belt, the conveying belt comprises a first belt section and a second belt section, and the first belt section is located above the second belt section; each of the first belt section and the second belt section is connected with a knife pressing unit; in one driving unit, the two cutter pressing units are arranged in a spaced mode in the first direction, and the conveying belt is used for driving the two cutter pressing units to move face to face or back to back; and the first lifting unit is connected with the driving unit and used for driving the driving unit to ascend and descend. According to the lamination device, the two cutter pressing units are connected with the same conveying belt, the two cutter pressing units can be simultaneously driven to move in the opposite directions or in the opposite directions through the conveying belt, the driving structure of the cutter pressing units can be simplified, the driving reliability can be improved, and it can be guaranteed that the two cutter pressing units have high synchronism.

Description

Technical Field

[0001] The present application relates to the technical field of battery core processing equipment, and in particular to a lamination device. Background Art

[0002] Lamination is a relatively important part of the cutting and lamination process. During the lamination process, the existing press knife needs to frequently open and close horizontally and lift and lower vertically to press the pole pieces and diaphragms used to form the battery cell. Since the movement accuracy of the existing press knife directly affects the alignment of the structural pieces, the control accuracy and synchronization of the existing press knife movement are required to be relatively high.

[0003] In the related art, the stacking table of the cutting and stacking machine includes four existing pressing knives, and a horizontal driving mechanism and a vertical driving mechanism are separately provided for each existing pressing knife. This makes the structure of the stacking table more complicated, the internal maintenance space is relatively small and crowded, the maintenance is more difficult, and the maintenance cost is high. Utility Model Content

[0004] In view of this, the purpose of the present application is to propose a lamination device to at least partially solve the problems of complex structure and inconvenient maintenance caused by separately providing a horizontal drive mechanism and a vertical drive mechanism for each existing pressing knife in the related art.

[0005] Based on the above-mentioned purpose, the present application provides a lamination device, including: at least two knife pressing units; a driving unit, including an annular conveyor belt, the conveyor belt including a first belt segment and a second belt segment, the first belt segment being located above the second belt segment; the first belt segment and the second belt segment are each connected to a knife pressing unit; in one of the driving units, the two knife pressing units are arranged at intervals along a first direction, and the conveyor belt is used to drive the two knife pressing units to move toward or away from each other; the first direction is parallel to the extension direction of the conveyor belt; a first lifting unit, connected to the driving unit, and the first lifting unit is used to drive the driving unit to move up and down.

[0006] Optionally, the knife pressing unit connected to the first belt segment includes a first main body, the top of the first main body is connected to a knife pressing unit extending out of the first main body along the first direction, the bottom of the first main body is connected to a clamping piece, the first belt segment is inserted between the first main body and the clamping piece, and the first main body is fixedly connected to the first belt segment via the clamping piece.

[0007] Optionally, the conveyor belt is a synchronous belt, and the bottom of the first body and / or the top of the clamping member are provided with teeth that mesh with the conveyor belt.

[0008] Optionally, the clamping member is connected to the bottom of the first main body through connecting structures respectively arranged on both sides of the conveyor belt along the second direction, and the clamping member and the first main body are respectively abutted against the conveyor belt; the second direction is parallel to the width direction of the conveyor belt.

[0009] Optionally, the knife pressing unit connected to the second belt segment includes a second body, a knife pressing unit is connected to the top of the second body, a clamping piece is connected to the bottom of the second body, the second body is also provided with a belt passing hole passing through the second body along the first direction, the first belt segment is passed through the belt passing hole, the second belt segment is passed between the second body and the clamping piece, and the second body is fixedly connected to the second belt segment via the clamping piece.

[0010] Optionally, the driving unit also includes a pulley connected to the conveyor belt; the stacking device has a compression state and a separation state, when the stacking device is in the compression state, the spacing distance between the two press units in the same driving unit is the smallest; when the stacking device is in the separation state, the spacing distance between the two press units in the same driving unit is the largest; when the stacking device is in the compression state, the spacing distance between the press unit and the pulley is not less than the moving distance of the press unit switching from the compression state to the separation state.

[0011] Optionally, the first lifting unit includes a support plate and a linear drive assembly connected to the bottom of the support plate, the drive unit is arranged on the support plate, and the first lifting unit is used to drive the drive unit to move up and down through the support plate.

[0012] Optionally, the lamination device further includes: a carrier, which is arranged between the two knife pressing units of the same driving unit; and a second lifting unit, which is connected to the carrier, and is used to drive the carrier to move up and down.

[0013] Optionally, the lamination device comprises at least two driving units, and the at least two driving units are arranged at intervals along the second direction.

[0014] Optionally, the first lifting unit and the driving unit are arranged in a one-to-one correspondence.

[0015] From the above, it can be seen that in the lamination device provided by the present application, the two press knife units are connected to the same conveyor belt, and the two press knife units can be driven to move toward or away from each other at the same time through the conveyor belt, which can not only simplify the driving structure of the press knife unit and improve the driving reliability, but also ensure that the two press knife units have high synchronization. At the same time, compared with the driving structure of the lead screw and the motor, the conveyor belt is less difficult to maintain and has less lubrication requirements, which can reduce the number of lubrication pipelines, so that the lamination device has a larger maintenance space, which is convenient for maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A three-dimensional schematic diagram of a lamination device according to an embodiment of the present application;

[0018] Figure 2 A schematic diagram of a lamination device in a separated state according to an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a lamination device in a compacted state according to an embodiment of the present application;

[0020] Figure 4 A three-dimensional schematic diagram of a knife pressing unit connected to the first belt segment of the lamination device according to an embodiment of the present application;

[0021] Figure 5 It is a cross-sectional schematic diagram of the lamination device of the embodiment of the present application in which the press knife unit is connected to the first belt segment;

[0022] Figure 6 An exploded schematic diagram of a knife pressing unit connected to the first belt segment of the lamination device according to an embodiment of the present application;

[0023] Figure 7 A three-dimensional schematic diagram of a knife pressing unit connected to the second belt segment of the lamination device according to an embodiment of the present application;

[0024] Figure 8 A side view schematic diagram of a lamination device according to an embodiment of the present application;

[0025] Fig. 9 It is a schematic top view of the lamination device according to an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 100, driving unit; 10, conveyor belt; 101, first belt segment; 102, second belt segment; 103, belt teeth; 20, pulley; 201, driving wheel; 202, driven wheel; 30, conveying motor;

[0028] 200, knife pressing unit; 210, first body; 220, clamping member; 2201, connection structure; 230, second body; 2301, belt passing hole; 240, knife pressing; 250, tooth;

[0029] 300, first lifting unit; 310, support plate; 320, linear drive assembly;

[0030] 400, carrier; 410, through slot; 500, second lifting unit; 600, structural piece. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0033] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] In the related art, the lamination table controls the horizontal and vertical movement of the existing pressing knife by driving the lead screw through a servo motor, so that the existing pressing knife can complete the combined action of approaching the pole piece and descending to press the pole piece, and the combined action of ascending and horizontally moving away from the pole piece. Usually, each existing pressing knife is equipped with a set of independently driven servo motors and lead screws to drive the existing pressing knife to move horizontally; and on this basis, additional servo motors and lead screws are set to drive the existing pressing knife to move vertically.

[0037] Since the existing press cutter frequently performs the above-mentioned combined actions, in order to ensure the smooth movement of the existing press cutter, a corresponding lubrication system needs to be set for the lead screw. Since the number of lead screws on the stacking table is large, the number and length of the pipelines used to transport the lubricating fluid in the lubrication system will also be correspondingly large, which will take up a lot of space, and the cost is high, and the risk of leakage is high. At the same time, even if a lubrication system is set for the lead screw, the lead screw will also experience significant mechanical wear after long-term and frequent movement, affecting the movement accuracy of the existing press cutter. In particular, when the horizontal movement accuracy of the existing press cutter decreases, the stop position of the existing press cutter close to the pole piece in the current movement cycle may be different from the stop position close to the pole piece in the next movement cycle, and the alignment accuracy between the pole pieces cannot be guaranteed, resulting in a reduction in the yield of the battery cell.

[0038] In view of this, if Figure 1 As shown, Figure 1 The present invention provides a laminating device, comprising: at least two press knife units 200; a driving unit 100, comprising an annular conveyor belt 10, the conveyor belt 10 comprising a first belt segment 101 and a second belt segment 102, the first belt segment 101 being located above the second belt segment 102; the first belt segment 101 and the second belt segment 102 are each connected to a press knife unit 200; in one driving unit 100, the two press knife units 200 are arranged along a first direction (such as Figure 1 The conveyor belt 10 is used to drive the two knife pressing units 200 to move toward or away from each other; the first direction is parallel to the extension direction of the conveyor belt 10; the first lifting unit 300 is connected to the driving unit 100, and the first lifting unit 300 is used to drive the driving unit 100 to move up and down.

[0039] Exemplarily, the lamination device includes one, two or more driving units 100 , and the conveyor belt 10 of each driving unit 100 is connected to two knife pressing units 200 .

[0040] Exemplarily, the first direction may be parallel to the length direction of the structural sheet 600 (pole sheet or separator) used to form the battery cell.

[0041] The operation of the lamination device is described below.

[0042] like Figure 2 , Figure 2 A schematic diagram showing the lamination device in a separated state. Figure 2 In the direction of the belt, the knife pressing unit 200 connected to the first belt segment 101 is located on the left, and the knife pressing unit 200 connected to the second belt segment 102 is located on the right.

[0043] like Figure 2 Before lamination, the first lifting unit 300 drives the conveyor belt 10 to rise. At the same time, the conveyor belt 10 rotates counterclockwise, the first belt segment 101 drives the knife pressing unit 200 connected thereto to move to the left, and the second belt segment 102 drives the knife pressing unit 200 connected thereto to move to the right, that is, the two knife pressing units 200 move back to back to form a space between the two knife pressing units 200 for placing the structural sheet 600.

[0044] like Figure 3 , Figure 3 A schematic diagram of the lamination device in a compacting state is shown. When lamination is performed, the structural sheet 600 is placed between the two knife pressing units 200. When the structural sheet 600 needs to be compacted, the conveyor belt 10 rotates clockwise, the first belt segment 101 drives the knife pressing unit 200 connected thereto to move to the right, and the second belt segment 102 drives the knife pressing unit 200 connected thereto to move to the left, that is, the two knife pressing units 200 move toward each other to synchronously approach the structural sheet 600. When the two knife pressing units 200 move to the preset position, the conveyor belt 10 stops rotating, and the two knife pressing units 200 stop moving horizontally. Afterwards, the first lifting unit 300 drives the conveyor belt 10 to descend, so that the two knife pressing units 200 move downward to compact the structural sheet 600.

[0045] In the laminating device provided in the embodiment of the present application, the two press knife units 200 are connected to the same conveyor belt 10, and the two press knife units 200 can be driven to move toward or away from each other at the same time through the conveyor belt 10, which can not only simplify the driving structure of the press knife unit 200 and improve the driving reliability, but also ensure that the two press knife units 200 have high synchronization. At the same time, compared with the driving structure of the lead screw and the motor, the conveyor belt 10 is less difficult to maintain and has less lubrication requirements, which can reduce the number of lubrication pipelines, so that the laminating device has a larger maintenance space, which is convenient for maintenance operations.

[0046] like Figure 4 As shown, Figure 4 The three-dimensional schematic diagram of the knife pressing unit connected to the first belt segment is shown. In some embodiments, the knife pressing unit 200 connected to the first belt segment 101 includes a first body 210, and the top of the first body 210 is connected with a Figure 4 The pressing blade 240 extends out of the first body 210 in the X direction, and the bottom of the first body 210 is connected to the clamping member 220. Figure 5 , Figure 5 The cross-sectional schematic diagram of the knife pressing unit connected to the first belt segment 101 is shown. The first belt segment 101 is arranged between the first body 210 and the clamping member 220 , and the first body 210 is fixedly connected to the first belt segment 101 through the clamping member 220 .

[0047] Exemplarily, the pressing blade 240 may be connected to the first body 210 by fasteners such as bolts; or, the pressing blade 240 may be integrally formed and connected to the first body 210 .

[0048] Exemplarily, the clamping member 220 and the first body 210 may be fixedly connected by clamping, welding, bonding or fasteners such as bolts.

[0049] Exemplarily, the first body 210 and the first band segment 101 can be connected by bonding or clamping, or the clamping member 220 and the first band segment 101 can be connected by bonding or clamping, or the first body 210 and the clamping member 220 can cooperate to clamp the first band segment 101.

[0050] For example, along the width direction of the conveyor belt 10 (eg Figure 4 In the Y direction), the size of the clamping member 220 and / or the size of the bottom of the first body 210 is greater than the width of the conveyor belt 10.

[0051] Exemplarily, the horizontal dimensions of the first body 210, except for the bottom connected to the clamping member 220, can be designed to be smaller to reduce the manufacturing cost and weight of the knife pressing unit 200. For example, along the width direction of the conveyor belt 10, the bottom dimension of the first body 210 is larger than the middle and top dimensions of the first body 210.

[0052] After the pressing blade unit 200 connected to the first belt segment 101 approaches the structural sheet 600 along the first direction, the portion of the pressing blade 240 extending out of the first body 210 along the first direction can overlap with the structural sheet 600. In other words, after the pressing blade 240 descends, the portion thereof extending out of the first body 210 can abut against the structural sheet 600 to press the structural sheet 600.

[0053] like Figure 5 The first belt segment 101 is inserted between the first main body 210 and the clamping member 220. Both the first main body 210 and the clamping member 220 can contact the first belt segment 101. Therefore, both the first main body 210 and the clamping member 220 can be provided with a structure for connecting the first belt segment 101, so that the connection between the knife pressing unit 200 and the first belt segment 101 can be more reliable.

[0054] like Figure 5As shown, in some embodiments, the conveyor belt 10 is a synchronous belt, and the bottom of the first body 210 and / or the top of the clamping member 220 are provided with teeth 250 that mesh with the conveyor belt 10 .

[0055] In order to further ensure that the knife pressing unit 200 and the conveyor belt 10 can move synchronously, the conveyor belt 10 can be a synchronous belt (or synchronous toothed belt), and at least one side of the synchronous belt is evenly provided with protruding belt teeth 103, such as Figure 5 When the teeth 250 at the bottom of the first body 210 and / or the teeth 250 at the top of the clamping member 220 are engaged with the belt teeth 103 , relative sliding between the knife pressing unit 200 and the conveyor belt 10 can be avoided, thereby ensuring that the knife pressing unit 200 can move synchronously with the conveyor belt 10 .

[0056] like Figure 6 As shown, Figure 6 An exploded schematic diagram of a knife pressing unit connected to the first belt segment is shown. In some embodiments, the clamping member 220 is connected to the bottom of the first body 210 through connection structures 2201 respectively arranged on both sides of the conveyor belt 10 along the second direction, and the clamping member 220 and the first body 210 are respectively in contact with the conveyor belt 10; the second direction is parallel to the width direction of the conveyor belt 10.

[0057] Exemplarily, the connection structure 2201 may be a claw fixedly connected to the clamping member 220 , or the connection structure 2201 may be a screw rotatably connected to the clamping member 220 , or the connection structure 2201 may also be a plug-in column fixedly connected to the clamping member 220 .

[0058] The clamping member 220 and the first body 210 are respectively in contact with the conveyor belt 10, that is, the clamping member 220 and the first body 210 cooperate with each other to clamp the first belt segment 101, so that the knife pressing unit 200 can be reliably connected to the conveyor belt 10, and further ensure that the knife pressing unit 200 can move synchronously with the conveyor belt 10. At the same time, the connection structure 2201 is arranged on both sides of the conveyor belt 10 along the width direction of the conveyor belt 10, which can make the clamping force generated by the first body 210 and the clamping member 220 on the conveyor belt 10 more uniform, ensuring stable and reliable clamping.

[0059] In some embodiments, the knife pressing unit 200 connected to the second belt segment 102 includes a second body 230, such as Figure 7 As shown, Figure 7The 3D schematic diagram of the knife pressing unit connected to the second belt segment is shown. The knife pressing unit 240 is connected to the top of the second body 230, the clamping member 220 is connected to the bottom of the second body 230, the second body 230 is also provided with a belt-through hole 2301 penetrating the second body 230 along the first direction, the first belt segment 101 is passed through the belt-through hole 2301, the second belt segment 102 is passed between the second body 230 and the clamping member 220, and the second body 230 is fixedly connected to the second belt segment 102 through the clamping member 220.

[0060] Exemplarily, the hole wall of the belt-penetrating hole 2301 does not contact the first belt segment 101 .

[0061] The way in which the second body 230 is connected to the second band segment 102 through the clamping member 220 is the same as the way in which the first body 210 is connected to the first band segment 101 through the clamping member 220, and will not be described in detail herein.

[0062] like Figure 2 Since the first belt segment 101 is located above the second belt segment 102, and the second body 230 also needs to be connected to the pressing knife 240 located above the first belt segment 101, the second body 230 also needs to avoid the first belt segment 101. To this end, a belt through hole 2301 is set on the second body 230, such as Figure 7 The first belt segment 101 is inserted into the belt-through hole 2301 and can move along the first direction, that is, the first belt segment 101 and the second body 230 can move relative to each other.

[0063] like Figure 1 The driving unit 100 further includes a pulley 20 connected to the conveyor belt 10 .

[0064] Exemplarily, the pulley 20 includes a driving wheel 201 and a driven wheel 202, the driving wheel 201 is in transmission connection with the transmission motor 30, and the transmission motor 30 is configured to drive the conveyor belt 10 to rotate through the driving wheel 201. The driven wheel 202 rotates as the conveyor belt 10 rotates, and the driven wheel 202 supports the conveyor belt 10 with the help of a bracket.

[0065] The lamination device has a compressed state and a separated state, such as Figure 3 When the lamination device is in the compacting state, the distance H1 between the two pressing knife units 200 in the same driving unit 100 is the smallest (i.e., the two pressing knife units 200 move toward each other to the limit position). Figure 2 When the laminating device is in the separated state, the distance H2 between the two pressing knife units 200 in the same driving unit 100 is the largest (i.e., the two pressing knife units 200 move to the limit position in opposite directions). When the laminating device is in the pressed state, the distance H3 between the pressing knife unit 200 and the pulley 20 is not less than the moving distance of the pressing knife unit 200 switching from the pressed state to the separated state.

[0066] Exemplarily, when the laminating device is in the pressing state, the spacing distance H3 between the pressing unit 200 and the belt wheel 20 is greater than the moving distance of the pressing unit 200 when switching from the pressing state to the separating state.

[0067] Combination Figure 3 When the lamination device is in a compacting state, along the first direction, the distance between the press blade unit 200 and the structural sheet 600 is the smallest, and the distance H3 between the press blade unit 200 and the pulley 20 is the largest. Figure 2 When the lamination device is in the separated state, the distance between the press unit 200 and the structural sheet 600 is the largest, and the distance H4 between the press unit 200 and the pulley 20 is the smallest. The difference between H3 and H4 is the moving distance of the press unit 200 from the pressed state to the separated state (hereinafter referred to as the one-way moving distance of the press unit).

[0068] In this embodiment, if H3 is greater than the one-way moving distance of the press unit, it means that the press unit 200 always maintains a distance from the belt wheel 20 during the movement, and there is no contact between the two. If H3 is equal to the one-way moving distance of the press unit, it means that the press unit 200 at most just contacts the belt wheel 20 during the movement toward the belt wheel 20. Therefore, ensuring that H3 is not less than the one-way moving distance of the press unit can provide sufficient moving space for the press unit 200, avoid the press unit 200 from colliding with the belt wheel 20 during the movement, and help to improve the service life of the stacking device.

[0069] like Figure 1 In some embodiments, the first lifting unit 300 includes a support plate 310 and a linear drive assembly 320 connected to the bottom of the support plate 310 , the drive unit 100 is disposed on the support plate 310 , and the first lifting unit 300 is used to drive the drive unit 100 to move up and down through the support plate 310 .

[0070] Exemplarily, the linear drive assembly 320 may include a lead screw, a motor connected to the lead screw, a nut threadedly connected to the lead screw, and a sliding member rotatably connected to the nut. After the motor is started, it can drive the lead screw to rotate, and the rotating lead screw can drive the nut to drive the sliding member to move linearly along the axis of the lead screw. In this embodiment, the lead screw of the linear drive assembly 320 of the first lifting unit 300 is vertically arranged, and the support plate 310 can be connected to the sliding member to achieve the lifting and moving of the support plate 310 by the linear drive assembly 320.

[0071] The drive unit 100 is arranged on the support plate 310, and the lifting and lowering of the two press knife units 200 can be controlled by a linear drive assembly 320, which helps to simplify the structure of the lamination device and helps to reduce maintenance costs and maintenance difficulties.

[0072] like Figure 2As shown, in some embodiments, the lamination device further includes: a carrier 400, which is disposed between two press units 200 of the same drive unit 100. When performing the lamination process, the structure sheet 600 is placed on the carrier 400. Figure 8 , Figure 8 The stacking device further comprises a second lifting unit 500 connected to the carrier 400, and the second lifting unit 500 is used to drive the carrier 400 to move upward and downward.

[0073] For example, Figure 2 The carrier 400 is provided with a through slot 410 that passes through the carrier 400 along the width direction of the conveyor belt 10, and the through slot 410 passes through the upper surface of the carrier 400. The carrier 400 can avoid the robot arm that grabs the structural sheet 600 or the support arm that supports the structural sheet 600 through the through slot 410.

[0074] Exemplarily, the structure of the second lifting unit 500 may be the same as that of the first lifting unit 300 , and the connection method between the second lifting unit 500 and the carrier 400 may be the same as that between the first lifting unit 300 and the pallet 310 , which will not be described in detail herein.

[0075] Exemplarily, the first lifting unit 300 and the second lifting unit 500 are controlled separately.

[0076] Before the lamination begins, the carrier 400 is located at the highest position, and the first lifting unit 300 drives the pressing knife 240 to rise to the first vertical preset position and move away from the carrier 400 along the first direction. When the first structural sheet is placed on the carrier 400, the pressing knife 240 approaches the carrier 400 along the first direction. After the pressing knife 240 moves to the preset position, the first lifting unit 300 drives the pressing knife 240 to descend to the second vertical preset position, so that the pressing knife 240 presses the first structural sheet on the carrier 400. After that, the second structural sheet is transported and placed on the first structural sheet, the pressing knife 240 still rises to the first vertical preset position, and the second lifting unit 500 drives the carrier 400 to descend a distance equal to the thickness of the second structural sheet. After that, the pressing knife 240 approaches the carrier 400 and still descends to the second vertical preset position, so that the pressing knife 240 presses the second structural sheet on the carrier 400. Repeat the above process until the lamination process of the battery cell is completed.

[0077] The second lifting unit 500 can make the carrier 400 descend a matching distance according to the thickness of the newly inserted structural sheet 600 during the stacking process. In this way, even if multiple structural sheets 600 are placed on the carrier 400, the position of the pressing knife 240 after rising and falling remains unchanged, which helps to simplify the operation control of the pressing knife 240.

[0078] like Fig. 9As shown, Fig. 9 In some embodiments, the stacking device includes at least two drive units 100, and the at least two drive units 100 are arranged along a second direction (such as Fig. 9 The Y direction in the image is used to set the interval.

[0079] Exemplarily, one support plate 310 may be connected to one driving unit 100 , two driving units 100 , or a plurality of driving units 100 .

[0080] Exemplarily, the second direction may be parallel to the width direction of the structural sheet 600 .

[0081] In combination with the foregoing content, it can be known that each driving unit 100 is connected to two pressing knife units 200. The stacking device of this embodiment can provide at least two pairs of pressing knife units 200 by setting at least two driving units 100, so as to realize multi-position pressing of the structural sheet 600 on the carrier 400, which can avoid the warping or tilting of the structural sheet 600 after local pressure, and help to improve the stacking quality and battery cell yield.

[0082] like Figure 8 As shown, in some embodiments, the first lifting unit 300 and the driving unit 100 are arranged in a one-to-one correspondence.

[0083] In this embodiment, the lifting action of each driving unit 100 is individually controlled by the first lifting unit 300 corresponding to the driving unit 100. Fig. 9 Taking the structure and direction shown as an example, during the lamination process, a pair of knife pressing units 200 connected to the lower driving unit 100 keep pressing down the existing structural sheet 600 on the carrier 400, while a pair of knife pressing units 200 connected to the upper driving unit 100 are away from the carrier 400 to prepare to press down the structural sheet 600 that is put in later. In other words, the two pairs of knife pressing units 200 can alternately press down the structural sheet 600 on the carrier 400 to further ensure that the position of the structural sheet 600 on the carrier 400 is fixed, which helps to improve the alignment of the structural sheet 600 and the cell yield.

[0084] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0085] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0086] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0087] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0088] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0089] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A lamination device, characterized in that: include: At least two knife pressing units; The driving unit comprises an annular conveyor belt, wherein the conveyor belt comprises a first belt segment and a second belt segment, wherein the first belt segment is located above the second belt segment; each of the first belt segment and the second belt segment is connected to a knife pressing unit; in one of the driving units, two knife pressing units are arranged at intervals along a first direction, and the conveyor belt is used to drive the two knife pressing units to move toward or away from each other; the first direction is parallel to the extension direction of the conveyor belt; The first lifting unit is connected to the driving unit, and the first lifting unit is used to drive the driving unit to move up and down.

2. The lamination device according to claim 1, characterized in that: The knife pressing unit connected to the first belt segment includes a first main body, the top of the first main body is connected to a knife pressing unit extending out of the first main body along the first direction, the bottom of the first main body is connected to a clamping piece, the first belt segment is inserted between the first main body and the clamping piece, and the first main body is fixedly connected to the first belt segment through the clamping piece.

3. The lamination device according to claim 2, characterized in that: The conveyor belt is a synchronous belt, and the bottom of the first body and / or the top of the clamping member are provided with teeth meshing with the conveyor belt.

4. The lamination device according to claim 2, characterized in that: The clamping member is connected to the bottom of the first main body through connection structures respectively arranged on both sides of the conveyor belt along the second direction, and the clamping member and the first main body are respectively in contact with the conveyor belt; the second direction is parallel to the width direction of the conveyor belt.

5. The lamination device according to claim 1, characterized in that: The knife pressing unit connected to the second belt segment includes a second main body, a knife pressing unit is connected to the top of the second main body, a clamping piece is connected to the bottom of the second main body, the second main body is also provided with a belt passing hole penetrating the second main body along the first direction, the first belt segment is passed through the belt passing hole, the second belt segment is passed between the second main body and the clamping piece, and the second main body is fixedly connected to the second belt segment through the clamping piece.

6. The lamination device according to claim 1, characterized in that: The driving unit further comprises a pulley connected to the conveyor belt; The lamination device has a pressing state and a separation state. When the lamination device is in the pressing state, the distance between the two pressing knife units in the same driving unit is the smallest; when the lamination device is in the separation state, the distance between the two pressing knife units in the same driving unit is the largest. When the lamination device is in the pressing state, the spacing distance between the knife pressing unit and the pulley is not less than the moving distance of the knife pressing unit when switching from the pressing state to the separation state.

7. The lamination device according to claim 1, characterized in that: The first lifting unit includes a support plate and a linear drive assembly connected to the bottom of the support plate. The drive unit is arranged on the support plate. The first lifting unit is used to drive the drive unit to move up and down through the support plate.

8. The lamination device according to claim 1, characterized in that: The lamination device further comprises: A carrier, arranged between the two knife pressing units of the same driving unit; The second lifting unit is connected to the carrier, and is used to drive the carrier to move up and down.

9. The lamination device according to claim 1, characterized in that: The lamination device comprises at least two driving units, and the at least two driving units are arranged at intervals along the second direction.

10. The lamination device according to claim 9, characterized in that: The first lifting unit and the driving unit are arranged in a one-to-one correspondence.

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