Lamination station, lamination machine and lamination method

Abstract

The application provides a lamination table, a lamination machine and a lamination method, and relates to the technical field of batteries. The lamination table comprises a cutting mechanism and a plurality of sub-lamination tables; each sub-lamination table has a bearing surface for bearing a composite material belt A; the plurality of sub-lamination tables have a shared material receiving station; the plurality of sub-lamination tables are moved along a first direction, so that the plurality of sub-lamination tables can be arranged at the material receiving station in turn; and the cutting mechanism is configured to cut the composite material belt A between adjacent two sub-lamination tables. According to the application, the plurality of sub-lamination tables are arranged in turn along the first direction, and are moved along the first direction, so that the sub-lamination tables can be arranged at the material receiving station in turn, and the composite material belt A carried by a sub-lamination table arranged at the material receiving station in turn can be guided by the movement of the sub-lamination table arranged at the material receiving station in turn. In this way, the position of the composite material belt A carried by the sub-lamination table can be effectively controlled, and additional guiding operation is not needed, so that the stacking efficiency of the lamination type electrode assembly can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a lamination table, a lamination machine and a lamination method. BACKGROUND

[0002] The electrode assembly is one of the core components of the battery. According to the forming mode, the electrode assembly is divided into a wound electrode assembly and a laminated electrode assembly. The main forming mode of the laminated electrode assembly is: first, a composite tape is formed by a forming device, then a part of the composite tape is folded back and forth in a Z shape on a lamination table to form a folded body, and then the folded body and the remaining part of the composite tape are cut off to form a laminated electrode assembly. The composite tape includes a diaphragm and a plurality of negative electrode sheets and a plurality of positive electrode sheets connected by the diaphragm. Each negative electrode sheet, the corresponding positive electrode sheet and the diaphragm located therebetween constitute a composite sheet. A plurality of composite sheets are stacked in sequence on the lamination table.

[0003] After the part of the composite tape is folded on the lamination table to form the folded body, the folded body needs to be cut off with the remaining part of the composite tape. After cutting, the end of the composite tape needs to be guided to the lamination table again, thereby resulting in a low stacking efficiency of the laminated electrode assembly. SUMMARY

[0004] Embodiments of the present application provide a lamination table, a lamination machine and a lamination method, which can improve the stacking efficiency of the laminated electrode assembly.

[0005] In a first aspect, embodiments of the present application provide a lamination table, which comprises a plurality of sub-lamination tables and a cutting mechanism; the plurality of sub-lamination tables are arranged in sequence along a first direction, and each sub-lamination table has a bearing surface for bearing a composite tape A; the plurality of sub-lamination tables have a common material receiving station; the plurality of sub-lamination tables are moved along the first direction, so that the plurality of sub-lamination tables are arranged in the material receiving station in turn; and the cutting mechanism is configured to cut the composite tape A between two adjacent sub-lamination tables.

[0006] In an embodiment, the sub-lamination table comprises a bearing plate and a lifting mechanism; the bearing plate has a bearing surface; and the lifting mechanism is connected to the bearing plate and is used to adjust the height position of the bearing surface.

[0007] In an embodiment, the sub-lamination table further comprises a fixed baffle, the fixed baffle is fixed relative to the lifting mechanism, and the fixed baffles of two adjacent sub-lamination tables along the first direction are arranged adjacent to each other; wherein, when the bearing plate is in the lowest position, the fixed baffle is at least partially located on the side of the bearing surface close to the composite tape A; and when the bearing plate is in the highest position, the fixed baffle does not exceed the bearing surface.

[0008] In an embodiment, when the first direction is a straight direction, the sub-stacking table at the head and tail positions in the first direction further comprises a synchronous baffle; for each sub-stacking table at the head and tail positions in the first direction, the synchronous baffle is connected to the bearing plate and at least partially located on the side of the bearing surface close to the composite material belt A, and the synchronous baffle of the sub-stacking table at the head and tail positions is arranged away from the adjacent sub-stacking table.

[0009] In an embodiment, the cutting mechanism comprises a cutter connected to a second driving assembly, and the second driving assembly drives the cutter to reciprocate in the second direction perpendicular to the bearing surface; wherein the cutter is configured to cut the composite material belt A at the position between two adjacent sub-stacking tables.

[0010] In an embodiment, the cutting mechanism further comprises a pressing cutter and a third driving assembly connected to the pressing cutter and the second driving assembly, and the third driving assembly drives the pressing cutter and the second driving assembly to reciprocate in the second direction; wherein the pressing cutter is configured to press down the composite material belt A at the material receiving station.

[0011] In an embodiment, the distance between the pressing cutter and the edge of the bearing surface adjacent to the material receiving station is 2mm-6mm.

[0012] In an embodiment, the stacking table further comprises a transposition driving assembly connected to the plurality of sub-stacking tables, and the transposition driving assembly drives the sub-stacking table at the material receiving station to move to one side of the material receiving station and simultaneously drives another sub-stacking table to move to the material receiving station.

[0013] In an embodiment, there are two cutting mechanisms, and along the first direction, the two cutting mechanisms are respectively located on the two sides of the material receiving station, and along the feeding direction of the composite material belt A, the structures of the two cutting mechanisms are mutually symmetrical.

[0014] In an embodiment, there are two sub-stacking tables, and the two sub-stacking tables are reciprocated along the first direction, so that the two sub-stacking tables can be alternately located at the material receiving station.

[0015] In a second aspect, an embodiment of the present application provides a stacking machine, which comprises a forming device and the aforementioned stacking table; the forming device is used for forming a composite material belt A, and the composite material belt A comprises a plurality of composite material pieces connected in sequence by a diaphragm; wherein the composite material belt A output by the forming device moves along a second direction to the bearing surface, and the second direction is perpendicular to the bearing surface.

[0016] In an embodiment, the forming device comprises a first feeding mechanism, two diaphragm feeding mechanisms, a first thermal compounding mechanism, two second feeding mechanisms, and a second thermal compounding mechanism; the first feeding mechanism is configured to provide the first pole piece; the two diaphragm feeding mechanisms are configured to respectively feed the diaphragm to the two sides of the first pole piece; the first thermal compounding mechanism is configured to heat at least one of the diaphragm and the first pole piece, and to press the diaphragm and the first pole piece to form a compound tape B; the two second feeding mechanisms are configured to respectively feed the second pole piece to the two sides of the compound tape B, and the two second feeding mechanisms feed alternately; the second thermal compounding mechanism is configured to heat at least one of the compound tape and the second pole piece, and to press the second pole piece and the compound tape B to form a compound tape A.

[0017] In an embodiment, the first thermal compounding mechanism comprises a first heating assembly and a first pressing roller assembly; the first heating assembly is configured to heat the first pole piece; and the first pressing roller assembly is configured to press the diaphragm and the heated first pole piece.

[0018] In an embodiment, the second thermal compounding mechanism comprises a second heating assembly and a second pressing roller assembly; the second heating assembly is configured to heat the second pole piece; and the second pressing roller assembly is configured to press the compound tape B and the heated second pole piece; wherein the second heating assembly comprises two second heating assemblies, and the two second heating assemblies are respectively arranged adjacent to the discharge ports of the two second feeding mechanisms.

[0019] In an embodiment, the forming device further comprises a heating and heat preservation assembly; the heating and heat preservation assembly is arranged between the second feeding mechanism and the second pressing roller assembly; and the heating and heat preservation assembly is configured to heat and preserve the second pole piece in contact with the compound tape B.

[0020] In an embodiment, the heating mode of the first thermal compounding mechanism and / or the second thermal compounding mechanism is any one of the following heating modes: electric heating, magnetic field heating, and heat exchange plate heating.

[0021] In an embodiment, the forming device further comprises a diaphragm edge sealing mechanism; the diaphragm edge sealing mechanism is arranged between the first thermal compounding mechanism and the discharge port of the second feeding mechanism; and the diaphragm edge sealing mechanism is configured to connect the two diaphragms at the part between the adjacent two first pole pieces.

[0022] In an embodiment, the forming device further comprises a deviation rectifying device; the part between the adjacent two first pole pieces is a spacing part; the deviation rectifying device collects position information of the spacing part relative to the working end of the diaphragm edge sealing mechanism, and controls the conveying speed of the compound tape A according to the position information.

[0023] In an embodiment, the deviation rectifying device comprises an image acquisition end for acquiring position information; wherein the image acquisition end is a CCD vision camera for acquiring position, and / or the distance between the image acquisition end and the working end of the diaphragm edge sealing mechanism is 1-3 center distances, and the center distance is the center distance between adjacent two composite material pieces when the composite material band A is in a flattened state.

[0024] In an embodiment, the first feeding mechanism comprises a first unwinding assembly, a first tab die cutting assembly, and a first tab cutting assembly; the first unwinding assembly is used for mounting a first tab roll, the first tab die cutting assembly is used for cutting the empty foil area of the first tab roll from the first unwinding assembly to form a first tab, and the first tab cutting assembly is used for cutting the first tab roll cut by the first tab die cutting assembly to form a first tab; and / or the second feeding mechanism comprises a second unwinding assembly, a second tab die cutting assembly, a second tab cutting assembly, and a second tab conveying device; the second unwinding assembly is used for mounting a second tab roll, the second tab die cutting assembly is used for cutting the empty foil area of the second tab roll from the second unwinding assembly to form a second tab, the second tab cutting assembly is used for cutting the second tab roll cut by the second tab die cutting assembly to form a second tab, and the second tab conveying device is used for conveying the second tab roll from the second unwinding assembly to the second tab die cutting assembly, the second tab cutting assembly, and the composite material band B in sequence.

[0025] In an embodiment, the laminating machine further comprises a material guiding mechanism; the forming device transmits the composite material band A along a direction parallel to a horizontal plane; the material guiding mechanism is located above the material receiving station, and the material guiding mechanism guides the composite material band A from the forming device to the carrying surface at the material receiving station along a second direction and stacks and places the composite material band A.

[0026] In an embodiment, the material guiding mechanism comprises a plurality of driving roller groups, the plurality of driving roller groups are arranged at intervals along the second direction, each driving roller group comprises two driving rollers arranged at intervals along a first direction, and the distance between the two driving rollers of each driving roller group is used for transmitting the composite material band A; and / or the material guiding mechanism has a first end facing the carrying surface, and the distance between the first end and the carrying surface is 1.5-2 center distances, and the center distance is the center distance between adjacent two composite material pieces when the composite material band A is in a flattened state.

[0027] In an embodiment, the first feeding mechanism is used for providing negative electrode tabs, and the second feeding mechanism is used for providing positive electrode tabs.

[0028] In a third aspect, an embodiment of the present application provides a laminating method, which is applied to stack the composite material band A on the laminating table provided by some embodiments of the present application, and the composite material band A comprises a plurality of composite material pieces connected in sequence by diaphragms.

[0029] The laminating method comprises:

[0030] The composite material tape A is conveyed to the bearing surface of the sub-laminating table at the receiving station, and the adjacent two composite material pieces are stacked in turn along the direction perpendicular to the bearing surface;

[0031] When the number of the composite material pieces stacked on the sub-laminating table at the receiving station reaches the preset value, the plurality of sub-laminating tables are moved along the first direction, so that the sub-laminating table whose number of the composite material pieces carried on the bearing surface reaches the preset value is located at one side of the receiving station, and another sub-laminating table is located at the receiving station;

[0032] When at least one composite material piece falls on the bearing surface of the sub-laminating table at the receiving station, the diaphragm part between the two adjacent sub-laminating tables is cut off by the cutting mechanism.

[0033] The beneficial effects of the embodiments of the present application are:

[0034] In the embodiments of the present application, the plurality of sub-laminating tables are arranged in turn along the first direction and are moved along the first direction to be located at the receiving station in turn, so that the composite material tape A carried by the sub-laminating table located at the receiving station is guided by the movement of the previous sub-laminating table. In this way, the position controllability of the composite material tape A carried by the sub-laminating table can be effectively ensured, and no additional guiding operation is required, thereby improving the stacking efficiency of the laminated electrode assembly. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a structural schematic view of a laminating table provided by the embodiments of the present application;

[0037] Figure 2 is a schematic view of the receiving of the laminating table provided by the embodiments of the present application;

[0038] Figure 3 is a structural schematic view of a sub-laminating table provided by the embodiments of the present application;

[0039] Figure 4 is a schematic view of the receiving of the laminating table provided by the embodiments of the present application;

[0040] Figure 5 is Figure 4 a schematic view of the sub-laminating table switched by the laminating table;

[0041] Figure 6 isFigure 1 Enlarged view of the middle A;

[0042] Figure 7 is a structural schematic view of another laminating table provided by embodiments of the present application;

[0043] Figure 8 is a structural schematic view of a laminating machine provided by embodiments of the present application;

[0044] Figure 9 is a top view of a composite material belt provided by embodiments of the present application;

[0045] Figure 10 is a structural schematic view of a composite material belt provided by embodiments of the present application;

[0046] Figure 11 is a schematic view of the positional relationship between an image acquisition end and a working end of a diaphragm edge sealing machine provided by embodiments of the present application;

[0047] Figure 12 is a schematic view of the positional relationship between a material guiding mechanism and a bearing surface provided by embodiments of the present application;

[0048] Figure 13 is a flow schematic view of a laminating method provided by embodiments of the present application;

[0049] Figure 14 is a first state schematic view of a laminating table receiving material provided by embodiments of the present application;

[0050] Figure 15 is a second state schematic view of a laminating table receiving material provided by embodiments of the present application;

[0051] Figure 16 is a third state schematic view of a laminating table receiving material provided by embodiments of the present application;

[0052] Figure 17 is a fourth state schematic view of a laminating table receiving material provided by embodiments of the present application;

[0053] Figure 18 is a fifth state schematic view of a laminating table receiving material provided by embodiments of the present application.

[0054] BRIEF DESCRIPTION OF THE DRAWINGS:

[0055] 1 - laminating table;

[0056] 11 - sub-laminating table; 111 - bearing surface; 112 - bearing plate; 113 - lifting mechanism; 114 - fixed baffle; 115 - synchronous baffle; 116 - assembling plate;

[0057] 12 - first sub-laminating table; 13 - second sub-laminating table;

[0058] 14 - material receiving station;

[0059] 15 - cutting mechanism; 151 - cutter; 152 - second driving assembly; 153 - third driving assembly; 154 - pressing knife;

[0060] 16 - transposition driving assembly;

[0061] 2 - laminating machine; 21 - forming device;

[0062] 22 - first feeding mechanism; 221 - first unwinding assembly; 222 - first tab die-cutting assembly; 223 - first tab cutting assembly;

[0063] 23 - diaphragm feeding mechanism;

[0064] 24 - first thermal compounding mechanism; 241 - first heating assembly; 242 - first pressing roller assembly;

[0065] 25 - second feeding mechanism; 251 - second unwinding assembly; 252 - second tab die-cutting assembly; 253 - second tab cutting assembly; 254 - second tab feeding device;

[0066] 26 - second thermal compounding mechanism; 261 - second heating assembly; 262 - second pressing roller assembly;

[0067] 27 - heating and holding assembly;

[0068] 28 - diaphragm edge sealing mechanism; 281 - working end;

[0069] 29 - deviation rectifying device; 291 - image acquisition end;

[0070] 300 - material guiding mechanism; 301 - driving roller set; 302 - driving roller; 303 - first end;

[0071] 31 - material line detection camera;

[0072] 10 - first tab; 20 - second tab; 30 - diaphragm; 40 - composite material tape A; 400 - composite material sheet; 50 - composite material tape B; 60 - first tab roll; 70 - second tab roll. DETAILED DESCRIPTION

[0073] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application.

[0074] In the present application, the orientation words such as "upper" and "lower" are generally used to refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing surface in the drawings. Multiple refers to at least two. The terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0075] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] The term "including", "containing" or any other variant thereof is intended to cover non-exclusive inclusion, so that the product or method including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such product or method.

[0077] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of the laminated plate table 1 provided by the embodiments of the present application, Figure 2Figure 1 is a schematic view of a lamination table 1 according to an embodiment of the present application. An embodiment of the present application provides a lamination table 1. The lamination table 1 comprises a plurality of sub-lamination tables 11 and a cutting mechanism 15. The plurality of sub-lamination tables 11 are arranged in sequence along a first direction. Each of the sub-lamination tables 11 has a bearing surface 111 for bearing a composite material strip A40. The plurality of sub-lamination tables 11 have a common material receiving station 14. The plurality of sub-lamination tables 11 are moved along the first direction so that the plurality of sub-lamination tables 11 are arranged in sequence at the material receiving station 14. The cutting mechanism 15 is configured to cut the composite material strip A40 between two adjacent sub-lamination tables 11.

[0078] It can be understood that the composite material strip A40 comprises a plurality of composite material pieces 400, and each of the composite material pieces 400 comprises a separator 30, a negative electrode piece, a separator 30 and a positive electrode piece in sequence. The separators 30 of two adjacent composite material pieces 400 are connected to each other.

[0079] It can be understood that the cutting mechanism 15 can be arranged on one side of the sub-lamination table 11, or on one side of the material receiving station, or held by an operator.

[0080] It can be understood that, in order to reduce the difficulty of material receiving, the bearing surface 111 is parallel to a horizontal plane, and the composite material strip A40 can fall onto the bearing surface 111 under the action of gravity.

[0081] It can be understood that the movement of the sub-lamination table 11 along the first direction can be achieved by a driving assembly or manually.

[0082] It can be understood that the material receiving station 14 can be one, and the position of the sub-lamination table 11 on one side of the material receiving station 14 can be a material discharging station.

[0083] It can be understood that the number of sub-lamination tables 11 can be two or more. When the number of sub-lamination tables 11 is two, the first direction is a straight line direction, and the two sub-lamination tables 11 are moved back and forth along the first direction so that the two sub-lamination tables 11 are arranged in sequence at the material receiving station 14 and the material discharging station. When the number of sub-lamination tables 11 is more than two, the first direction can be a straight line direction. At this time, each of the sub-lamination tables 11 can be moved in sequence along a direction so that the plurality of sub-lamination tables 11 are arranged in sequence at the material receiving station 14. When all the sub-lamination tables 11 have completed material receiving, each of the sub-lamination tables 11 can be moved in sequence along an opposite direction so that the plurality of sub-lamination tables 11 are arranged in sequence at the material receiving station 14 again for material receiving.

[0084] In addition, when there are multiple sub-stacking tables 11, the first direction can also be a rotating direction, for example, a clockwise direction or an anticlockwise direction. At this time, the multiple sub-stacking tables 11 can be arranged in a ring shape, so that each sub-stacking table 11 can be sequentially moved in the clockwise direction or the anticlockwise direction, and the multiple sub-stacking tables 11 can be sequentially located at the material receiving station 14. In order to adapt to the formation of the composite material sheet 400, the moving track of the sub-stacking table 11 at the material receiving station is a straight line.

[0085] As shown in Figure 2 the drawings, when the number of the composite material sheets 400 carried by the sub-stacking table 11 located at the material receiving station 14 reaches the preset value, each sub-stacking table 11 is moved in the first direction, so that the sub-stacking table 11 carrying the composite material sheets 400 with the number reaching the preset value is located at the material discharging station, and another sub-stacking table 11 is located at the material receiving station 14. With the movement of the sub-stacking table 11, the continuously conveyed composite material sheet 400 automatically falls onto the next carrying surface 111 located at the material receiving station 14, so as to perform the stacking operation of the next stacked electrode assembly. Then, the cutting mechanism 15 cuts the composite material belt A40 between two adjacent sub-stacking tables 11, so that the composite material sheet 400 located at the material discharging station can be discharged.

[0086] In the embodiment, the multiple sub-stacking tables 11 are sequentially arranged in the first direction and are sequentially moved in the first direction, so as to be sequentially located at the material receiving station 14. Therefore, the composite material belt A40 carried by the sub-stacking table 11 located at the material receiving station 14 can be guided by the movement of the previous sub-stacking table 11 located at the material receiving station 14. In this way, on the one hand, the position controllability of the composite material belt A40 carried by the sub-stacking table 11 can be effectively ensured, and no additional guiding operation is needed, so as to improve the stacking efficiency of the stacked electrode assembly. On the other hand, the alignment of the first and last composite material sheets 400 of each stacked electrode assembly can be improved, so as to improve the stacking alignment of the electrode assemblies stacked on the stacking table 1.

[0087] The guiding operation refers to guiding the cut end of the composite material belt A40 to a preset position of the carrying surface 111, so that the end of the composite material belt A40 from the forming device can be folded in a Z-shaped reciprocating manner on the carrying surface 111 according to a preset folding direction under the action of gravity to form a neat folded body.

[0088] Please refer to Figure 3 , Figure 3 is a structural schematic diagram of the sub-stacking table 11 provided by the embodiment. In an embodiment, the sub-stacking table 11 includes a carrying plate 112 and a lifting mechanism 113. The carrying plate 112 has a carrying surface 111. The lifting mechanism 113 is connected with the carrying plate 112. The lifting mechanism 113 is used for adjusting the height position of the carrying surface 111.

[0089] Exemplarily, the lifting mechanism 113 includes but is not limited to a linear motor, a pneumatic rod, a hydraulic rod, a worm gear assembly, a scissor assembly, a screw rod assembly, and a return spring.

[0090] It can be understood that the driving end of the lifting mechanism 113 is connected with the bearing plate 112.

[0091] It can be understood that the lifting mechanism 113 can be fixed on any structure other than the sub-lamination table 11 and capable of moving along the first direction with the sub-lamination table 11.

[0092] It can be understood that as the composite material sheet 400 is stacked on the bearing surface 111 at the receiving station 14, the height of the stacked composite material sheet 400 will increase. If the height position of the bearing surface 111 is not adjusted, the falling position of the composite material sheet 400 will increase, which will reduce the smoothness of the subsequent composite material sheet 400 falling into the sub-lamination table 11.

[0093] Based on this, the embodiment sets the lifting mechanism 113 to adjust the height of the bearing surface 111, as shown in Figure 4 Figure 4 is another schematic diagram of the receiving of the lamination table 1 provided by the embodiment. As the height of the stacked composite material sheet 400 increases, the height position of the bearing plate 112 is adjusted by the lifting mechanism 113, so that the height position of the bearing plate 112 is constantly lowered. When the bearing plate 112 is empty, the bearing plate 112 is at the highest position. Optionally, the height of the empty bearing surface 111 is consistent with the height of the top surface of the loaded preset number of composite material sheets 400. When the bearing plate 112 is loaded with the preset number of composite material sheets 400, the height position of the bearing plate 112 is the lowest.

[0094] In the embodiment, by setting the lifting mechanism 113 to adjust the height of the bearing surface 111, the height of the bearing surface 111 can be constantly lowered as the height of the stacked composite material sheet 400 increases, so that the falling position height of each composite material sheet 400 is consistent, thereby improving the smoothness of the subsequent composite material sheet 400 falling into the sub-lamination table 11.

[0095] Furthermore, by setting the lifting mechanism 113 to adjust the height of the bearing surface 111, the top surface of the completed stacked composite material sheet 400 can be consistent with the height of the bearing surface 111 of the next receiving sub-lamination table 11 after carrying a composite material sheet 400. In this way, not only can the smoothness of the cutting mechanism 15 cutting the part of the composite material belt A40 between two adjacent sub-lamination tables 11 be improved, but also the support of the bearing plate 112 of the receiving station 14 to the composite material sheet 400 can be improved, thereby improving the smoothness of the cutting, as shown in Figure 5 Figure 5 is Figure 4 ​​A schematic view of the lamination station 1 switching the sub-lamination station 11 receiving the material.

[0096] In addition, by adjusting the height of the bearing surface 111 through the lifting mechanism 113, the top surface of the stacked composite material sheet 400 can be consistent with the height of the bearing surface 111 of the next sub-lamination station 11 after receiving a composite material sheet 400, and thus the composite material sheet 400 on the next sub-lamination station 11 can be in a horizontal position, so that the composite material sheet 400 has a larger contact area with the corresponding bearing surface 111. In this way, after cutting the composite material strip A40 at the part between the adjacent two sub-lamination stations 11, the composite material sheet 400 on the next sub-lamination station 11 will not move. In this way, the movement of the previous sub-lamination station 11 in the receiving station 14 can improve the smoothness of the composite material strip A40 guided by the next sub-lamination station 11 in the receiving station 14.

[0097] Please refer to Figure 3 In an embodiment, the sub-lamination station 11 further comprises a fixed baffle 114. The fixed baffle 114 is fixed relative to the lifting mechanism 113. The fixed baffles 114 of two adjacent sub-lamination stations 11 in the first direction are arranged adjacent to each other. Among them, when the bearing plate 112 is in the lowest position, the fixed baffle 114 is at least partially located on the side of the bearing surface 111 close to the composite material strip A40. When the bearing plate 112 is in the highest position, the fixed baffle 114 does not exceed the bearing surface 111.

[0098] It can be understood that the fixed baffle 114 is fixed relative to the lifting mechanism 113, which means that the fixed baffle 114 can move with the corresponding sub-lamination station 11 as the lifting mechanism 113 moves, but does not move with the driving end of the lifting mechanism 113.

[0099] It can be understood that the fixed baffle 114 can be fixed on any structure other than the sub-lamination station 11 and capable of moving in the first direction with the sub-lamination station 11, for example, the shell of the lifting mechanism 113.

[0100] It can be understood that as the height of the stacked composite material sheet 400 increases, the height of the bearing plate 112 decreases, so that the height dimension of the fixed baffle 114 on the side of the bearing surface 111 close to the composite material strip A40 increases, as shown in Figure 4 and Figure 5 In this way, the fixed baffle 114 can limit the stacked composite material sheet 400, so that during the movement of the sub-lamination station 11, the stacked composite material sheet 400 can not move relative to the bearing plate 112 due to inertia, and thus the movement speed of the sub-lamination station 11 can be improved to improve the stacking efficiency of the laminated electrode assembly.

[0101] Please refer to Figure 3In an embodiment, when the first direction is a straight line, the sub-stacking table 11 at the head and tail positions of the first direction further comprises a synchronous stop plate 115. For each sub-stacking table 11 at the head and tail positions of the first direction, the synchronous stop plate 115 is connected to the bearing plate 112 and at least partially located on the side of the bearing surface 111 close to the composite material belt A40. The synchronous stop plate 115 of the sub-stacking table 11 at the head and tail positions is arranged away from the adjacent sub-stacking table 11.

[0102] It can be understood that, due to the arrangement of the sub-stacking table 11 on one side of the head and tail positions, the other side of the sub-stacking table 11 is empty. Therefore, the synchronous stop plate 115 can be arranged on the side of the sub-stacking table 11 at the head and tail positions without the sub-stacking table 11 without affecting the stacking of the composite material sheet 400.

[0103] In the present embodiment, by arranging the synchronous stop plate 115 on the sub-stacking table 11 at the head and tail positions, the synchronous stop plate 115 can limit the stacking of the composite material sheet 400, and the synchronous stop plate 115 can be directly fixed to the bearing plate without additional design of the sliding fit structure between the synchronous stop plate 115 and the bearing plate, thereby reducing the design difficulty and manufacturing difficulty.

[0104] Please refer to Figure 1 or Figure 2 or Figure 4 or Figure 5 In an embodiment, the cutting mechanism 15 comprises a cutter 151 and a second driving assembly 152 connected thereto. The second driving assembly 152 drives the cutter 151 to reciprocate along a second direction. The second direction is perpendicular to the bearing surface 111. The cutter 151 is configured to cut the composite material belt A40 between two adjacent sub-stacking tables 11.

[0105] Exemplarily, the second driving assembly 152 includes but is not limited to a linear motor, a pneumatic rod, a hydraulic rod, a worm gear assembly, a scissor-type telescopic assembly, and a lead screw assembly.

[0106] It can be understood that the driving end of the second driving assembly 152 is connected to the cutter 151.

[0107] It can be understood that the second driving assembly 152 can be fixed to the sub-stacking table 11, in which case a cutting mechanism 15 needs to be configured for each sub-stacking table 11. The second driving assembly 152 can also be fixed to the rack to fix its position and cut the composite material belt A40 between each sub-stacking table 11 at the material receiving station 14 and the sub-stacking table 11 on the side of the material receiving station 14.

[0108] It can be understood that the length of the cutting edge of the cutter 151 is not less than the size of the position of the composite material belt to be cut along the extension direction of the cutting edge. In this way, the composite material belt A40 can be cut by one cutting stroke.

[0109] Referring to Figure 1 or Figure 2 or Figure 4 or Figure 5 In an embodiment, the cutting mechanism 15 further comprises a pressing knife 154 and a third driving assembly 153. The third driving assembly 153 is connected with the pressing knife 154 and the second driving assembly 152. The third driving assembly 153 drives the pressing knife 154 and the second driving assembly 152 to reciprocate in the second direction. The pressing knife 154 is configured to press the edge of the membrane 30 of the composite material strip A40 located in the receiving station 14.

[0110] Specifically, the pressing knife 154 is configured to press the edge of the membrane 30 of the composite material strip A40 located in the receiving station 14.

[0111] Exemplarily, the third driving assembly 153 comprises but is not limited to a linear motor, a pneumatic rod, a hydraulic rod, a worm gear assembly, a scissor-type telescopic assembly, and a lead screw assembly.

[0112] It can be understood that the driving end of the third driving assembly 153 is connected with the pressing knife 154 and the second driving assembly 152.

[0113] It can be understood that the third driving assembly 153 can be fixed on the sub-laminate table 11, in which case a cutting mechanism 15 needs to be configured for each sub-laminate table 11. The third driving assembly 153 can also be fixed on the rack to fix its position and cut the composite material strip A40 between each sub-laminate table 11 in the receiving station 14 and the sub-laminate table 11 on one side of the receiving station 14.

[0114] It can be understood that when the composite material strip A40 is located between two adjacent sub-laminate tables 11, the third driving assembly 153 is started first to press the composite material strip A40 with the pressing knife 154, specifically, to press the membrane 30 between the two adjacent composite material pieces 400. Then the second driving assembly 152 is started to move the pressing knife 154 downward, thereby cutting the composite material strip A40 between the two adjacent sub-laminate tables 11.

[0115] In this embodiment, by providing the pressing knife 154, the stacked composite material strip can be fixed when cutting the composite material strip A40, thereby avoiding the movement of the stacked composite material pieces 400 during cutting. In this way, the consistency of the positions of the composite material pieces 400 before and after cutting can be effectively ensured, thereby improving the neatness of the stacking of the composite material pieces 400.

[0116] Referring to Figure 6 , Figure 6 is Figure 1 an enlarged view of A in FIG. 4. In an embodiment, the distance d1 between the pressing knife 154 and the edge of the bearing surface 111 adjacent thereto is 2mm-6mm.

[0117] It can be understood that the spacing d1 between the pressing knife 154 and the edge of the bearing surface 111 adjacent to the pressing knife 154 includes but is not limited to 2 mm, 2.6 mm, 3 mm, 3.2 mm, 3.8 mm, 4 mm, 4.5 mm, 4.7 mm, 4.9 mm, 5 mm, 5.2 mm, 5.6 mm, 5.8 mm, 6 mm.

[0118] In the embodiment, by limiting the spacing d1 between the pressing knife 154 and the edge of the bearing surface 111 adjacent to the pressing knife 154, the current collector and the active material layer of the positive and negative electrode sheets can be prevented from being damaged in the cutting process of the pressing knife 154, so as to ensure the quality of the laminated electrode assembly.

[0119] Please refer to Figure 1 or Figure 7 , Figure 7 is another structure diagram of a laminating table provided by the embodiment of the present application. In an embodiment, the laminating table 1 further comprises a transposition driving assembly 16. The transposition driving assembly 16 is connected with the plurality of sub-laminating tables 11. The transposition driving assembly 16 drives the sub-laminating table 11 located at the material receiving station 14 to move to one side of the material receiving station 14, and simultaneously drives another sub-laminating table 11 to move to the material receiving station 14.

[0120] Exemplarily, the transposition driving assembly 16 includes but is not limited to a linear motor, a pneumatic rod, a hydraulic rod, a worm gear assembly, a scissor-type telescopic assembly, and a lead screw assembly.

[0121] It can be understood that the driving end of the transposition driving assembly 16 is connected with the sub-laminating table 11.

[0122] It can be understood that the transposition driving assembly 16 can be fixed on the rack, or can be directly fixed on the ground.

[0123] Specifically, the transposition driving assembly 16 is a lead screw assembly. The axis of the lead screw is parallel to the first direction. A driving nut is threadedly sleeved on the lead screw. The driving nut serves as the driving end of the transposition driving assembly 16. The lead screw rotates forward or reversely to drive the driving nut to move back and forth along the first direction, so as to drive the sub-laminating table 11 to reciprocate along the first direction.

[0124] Specifically, the lifting mechanism 113 and the fixed baffle 114 are fixed on the driving end of the transposition driving assembly 16.

[0125] In the embodiment, the sub-laminating table 11 is driven to move along the first direction by the transposition driving assembly 16, which can reduce the labor intensity of workers and ensure the consistency of the movement of each sub-laminating table 11, so as to facilitate the smooth stacking of the composite material sheets 400.

[0126] In addition, as Figure 7As shown, in order to improve the integrity of each sub-stacking table 11, an assembly plate 116 can be arranged between the sub-stacking table 11 and the driving end of the transposition driving assembly 16, so that the sub-stacking table 11 can be assembled on the assembly plate 116, and then fixed on the driving end of the transposition driving assembly 16 through the assembly plate 116, to improve the assembly convenience.

[0127] Referring to Figure 1 or Figure 2 or Figure 4 or Figure 5 In an embodiment, the cutting mechanism 15 has two. Along the first direction, the two cutting mechanisms 15 are respectively located on both sides of the receiving station 14. And along the feeding direction of the composite material strip A40, the structures of the two cutting mechanisms 15 are mutually symmetrical. In this way, the arrangement difficulty of the cutting mechanism 15 can be reduced, and one of the cutting mechanisms 15 to be worked can be maintained in the operation of cutting the composite material strip A40 without interruption, so as to improve the smoothness of the stacking of the composite material pieces 400.

[0128] Referring to Figure 1 or Figure 2 or Figure 4 or Figure 5 In an embodiment, the sub-stacking table 11 has two. Moving the two sub-stacking tables 11 along the first direction reciprocally can make the two sub-stacking tables 11 rotate in the receiving station 14. In this way, the number of sub-stacking tables 11 can be reduced to meet the stacking of the composite material pieces 400, and the complexity of switching the sub-stacking tables 11 can be reduced to improve the smoothness of the stacking of the composite material pieces 400.

[0129] Referring to Figure 8 , Figure 8 is a structural schematic diagram of the laminating machine 2 provided by an embodiment of the present application. Accordingly, an embodiment of the present application provides a laminating machine 2. The laminating machine 2 comprises a forming device 21 and the aforementioned laminating table 1. The forming device 21 is used for forming a composite material strip A40. The composite material strip A40 comprises a plurality of composite material pieces 400 connected in sequence by a diaphragm 30. The diaphragms 30 of adjacent two composite material pieces 400 are connected to each other. Among them, the composite material strip A40 output by the forming device 21 moves along the second direction to the bearing surface 111, and the second direction is perpendicular to the bearing surface 111.

[0130] In the embodiment, by using the laminating table 1 provided by some embodiments of the present application, a plurality of sub-stacking tables 11 can be arranged in sequence along the first direction and rotated in the receiving station 14 by moving along the first direction, so that the composite material strip A40 carried by the sub-stacking table 11 located in the receiving station 14 can be guided by the movement of the previous sub-stacking table 11. In this way, the position controllability of the composite material strip A40 carried by the sub-stacking table 11 can be effectively guaranteed, and no additional guiding operation is needed, so that the stacking efficiency of the laminated electrode assembly can be improved.

[0131] Referring to Figure 8 In an embodiment, the forming device 21 comprises a first feeding mechanism 22, two diaphragm feeding mechanisms 23, a first thermal compounding mechanism 24, two second feeding mechanisms 25, and a second thermal compounding mechanism 26. The first feeding mechanism 22 is configured to provide the first electrode plate 10. The two diaphragm feeding mechanisms 23 are respectively arranged on the two sides of the first feeding mechanism 22, and are configured to respectively feed the diaphragm 30 to the two sides of the first electrode plate 10. The first thermal compounding mechanism 24 is configured to heat at least one of the diaphragm 30 and the first electrode plate 10, and to press the diaphragm 30 and the first electrode plate 10 to form a compound material strip B50. The two second feeding mechanisms 25 are respectively arranged on the two sides of the first feeding mechanism 22, and are configured to respectively feed the second electrode plate 20 to the two sides of the compound material strip B50, and the two second feeding mechanisms 25 feed alternately. The second thermal compounding mechanism 26 is configured to heat at least one of the compound material strip and the second electrode plate 20, and to press the second electrode plate 20 and the compound material strip B50 to form a compound material strip A40.

[0132] It can be understood that the speed of feeding the first electrode plate 10 and the second electrode plate 20 by the first feeding mechanism 22 and the second feeding mechanism 25 can be adjusted, so that the interval between the adjacent two compound material strips 400 can be adapted to different production requirements. For example, when the first electrode plate 10 and the second electrode plate 20 fed by the first feeding mechanism 22 and the second feeding mechanism 25 belong to the same laminated electrode assembly, the feeding speed can be relatively large, so that the interval d2 between the adjacent two compound material strips 400 is relatively small. Alternatively, the interval d2 is 1mm-2mm, as shown in Figure 9 Figure 9 is a top view of the compound material strip provided by the embodiment of the present application.

[0133] When the first electrode plate 10 and the second electrode plate 20 fed by the first feeding mechanism 22 and the second feeding mechanism 25 belong to two laminated electrode assemblies, the feeding speed can be reduced, so that the interval d3 between the two laminated electrode assemblies is relatively large, so as to facilitate the cutting of the cutting mechanism 15. Alternatively, the interval d3 is 0.3mm-0.5mm, as shown in Figure 9

[0134] In addition, in order to avoid lithium precipitation, the number of negative electrode plates in each electrode assembly can be more than the number of positive electrode plates. For example, the negative electrode plate and the diaphragm 30 can be compounded in the head compound laminated plate or the tail compound laminated plate of each electrode assembly, as shown in Figure 10 Figure 10 is a structural schematic view of the compound material strip provided by the embodiment of the present application.​​​

[0135] Referring to Figure 8 In an embodiment, the first thermal compounding mechanism 24 comprises a first heating assembly 241 and a first compression roller assembly 242. The first heating assembly 241 is configured to heat the first pole piece 10. The first compression roller assembly 242 is configured to press the diaphragm 30 and the heated first pole piece 10 together. In this embodiment, the first pole piece 10 is heated to make the first pole piece 10 and the diaphragm 30 integrated, on the one hand, the air permeability of the diaphragm 30 can be ensured by avoiding the air permeable holes of the diaphragm 30 being blocked; on the other hand, the difficulty of cleaning the first compression roller assembly 242 can be reduced by avoiding the diaphragm 30 being heated to cause the glue particles on the surface of the diaphragm 30 sticking to the roller.

[0136] In addition, the diaphragm 30 is not heated by the first compression roller assembly 242, which can reduce the structural complexity of the first compression roller, thereby reducing the manufacturing cost of the lamination machine 2.

[0137] Optionally, the first compression roller assembly 242 comprises two oppositely arranged compounding rollers. The two compounding rollers press the first pole piece 10 and the diaphragm 30 stacked together, thereby connecting the first pole piece 10 and the diaphragm 30 together.

[0138] In this embodiment, the first heating assembly 241 can heat the first pole piece 10 to 80-180°C. In this way, the first pole piece 10 can not only heat melt the diaphragm 30 to make the first pole piece 10 and the diaphragm 30 integrated, but also avoid the first pole piece 10 being damaged due to high temperature.

[0139] Referring to Figure 8 In an embodiment, the second thermal compounding mechanism 26 comprises a second heating assembly 261 and a second compression roller assembly 262. The second heating assembly 261 is configured to heat the second pole piece 20. The second compression roller assembly 262 is configured to press the compounding tape B50 and the heated second pole piece 20 together. In this embodiment, the second pole piece 20 is heated to make the second pole piece 20 and the compounding tape B50 integrated, on the one hand, the air permeability of the diaphragm 30 can be ensured by avoiding the air permeable holes of the diaphragm 30 being blocked; on the other hand, the difficulty of cleaning the second compression roller assembly 262 can be reduced by avoiding the diaphragm 30 being heated to cause the glue particles on the surface of the diaphragm 30 sticking to the roller.

[0140] Optionally, the second compression roller assembly 262 comprises two oppositely arranged compounding rollers. The two compounding rollers press the second pole piece 20 and the compounding tape B50 stacked together, thereby connecting the second pole piece 20 and the compounding tape B50 together.

[0141] In addition, the second pressing roller assembly 262 is cancelled to heat the diaphragm 30, and the structure of the second pressing roller is simplified, thereby reducing the manufacturing cost of the laminating machine 2.

[0142] The distance between the heating end of the second heating assembly 261 and the first pole piece 10 is 3mm-5mm. The second heating assembly 261 can heat the second pole piece 20 to 80℃-180℃. In this way, the second pole piece 20 can not only heat the diaphragm 30 to compound the second pole piece 20 and the diaphragm 30 into one, but also avoid damage to the second pole piece 20 due to high temperature.

[0143] In addition, compared with the way of heating the second pole piece 20 by setting two second heating assemblies 261 at the part of the second pole piece 20 contacting the compound material belt B50, setting two second heating assemblies 261 adjacent to the discharge ports of two second feeding mechanisms 25 respectively can not only reduce the arrangement length of the forming device 21 to reduce the floor area of the forming device 21, but also avoid the influence of heating the second pole piece 20 on the diaphragm 30, thereby effectively ensuring the air permeability of the diaphragm 30.

[0144] Please refer to Figure 8 In an embodiment, the forming device 21 further comprises a heating and heat preservation assembly 27. The heating and heat preservation assembly 27 is arranged between the second feeding mechanism 25 and the second pressing roller assembly 262. The heating and heat preservation assembly 27 is used to heat and preserve the second pole piece 20 contacting the compound material belt B50.

[0145] The heating temperature of the heating and heat preservation assembly 27 is 40℃-80℃.

[0146] Optionally, the heating and heat preservation assembly 27 can be an oven. The second pole piece 20 contacts the compound material belt B50, enters the heating and heat preservation assembly 27 from one end of the heating and heat preservation assembly 27, and is output from the other end to enter the second pressing roller assembly 262.

[0147] It can be understood that since two second heating assemblies 261 are arranged adjacent to the discharge ports of two second feeding mechanisms 25 respectively, when the second pole piece 20 is heated and then compounded onto the compound material belt B50 by the second pressing roller assembly 262, the distance is far, which is easy to cause the temperature of the second pole piece 20 when compounded with the compound material belt B50 to be low.

[0148] Therefore, in this embodiment, by setting the heating and heat preservation assembly 27, the second pole piece 20 can be heated and preserved, so as to effectively ensure the compounding temperature of the formed compound material belt A40, thereby ensuring the forming quality of the compound material belt.

[0149] In an embodiment, the heating mode of the first thermal compounding mechanism 24 and / or the second thermal compounding mechanism 26 is any one of the following heating modes: electric heating, magnetic field heating, and heat exchange plate heating.

[0150] Optionally, the heating mode of the first thermal compounding mechanism 24 and the second thermal compounding mechanism 26 is electromagnetic heating. Electromagnetic heating is a heating mode that converts electric energy into heat energy by using the principle of electromagnetic induction. In the process of electromagnetic heating, the first thermal compounding mechanism 24 and the second thermal compounding mechanism 26 generate an alternating magnetic field through the electronic circuit board component. When the first pole piece 10 and the second pole piece 20 enter the magnetic field, the magnetic lines of force generate alternating currents, i.e. eddy currents, at the current collectors of the first pole piece 10 and the second pole piece 20. The high-speed random motion of the eddy current current collectors, the mutual collision and friction of the atoms generate heat energy.

[0151] The use of electromagnetic heating can reduce the loss in the heat transfer process, and can make the first pole piece 10 and the second pole piece 20 reach a high temperature in a short time, and can improve the control accuracy of the heating temperature. In this way, the stacking efficiency of the laminated electrode assembly can be improved.

[0152] Please refer to Figure 8 In an embodiment, the forming device 21 further comprises a separator sealing mechanism 28. The separator sealing mechanism 28 is located between the first thermal compounding mechanism 24 and the discharge port of the second feeding mechanism 25. The separator sealing mechanism 28 is used to connect the two layers of separators 30 located between the adjacent two first pole pieces 10. In this way, after the composite material belt A40 is cut, the sealing operation can be used to connect the cut parts of the separators 30 into one, so as to effectively avoid the flanging of the separators 30, thereby improving the insulation isolation between the positive and negative pole pieces. In this way, the quality of the stacked electrode assembly can be improved.

[0153] It can be understood that the extension direction of the heat fusion seam formed by the separator sealing mechanism 28 on the separator 30 is perpendicular to the transmission direction of the composite material belt.

[0154] Optionally, the working end 281 of the separator sealing mechanism 28 is a cam mechanism. The cam mechanism rotates, so that the outer circumferential surface thereof is in contact with the separator 30. The cam mechanism is electrified and conducts heat, so as to heat and fuse the separator 30, so as to connect the separators 30 on both sides of the pole piece to each other.

[0155] Optionally, the width size w1 of the heat fusion seam formed by the heat fusion connection of the separator sealing mechanism 28 to the separator 30 is 0.3mm~0.5mm, as Figure 9 shown.

[0156] Please refer to Figure 8In one embodiment, the forming apparatus 21 further includes a web guiding device 29. The portion of the diaphragm 30 located between two adjacent first electrode plates 10 is a gap portion. The web guiding device 29 collects the position information of the gap portion relative to the working end 281 of the diaphragm sealing mechanism 28, and controls the conveying speed of the composite material strip A40 according to the position information.

[0157] The correction device 29 includes an image acquisition end 291 for acquiring position information, and the image acquisition end is a CCD (Charge Coupled Device) vision camera for acquiring position.

[0158] It can be understood that the working end 281 refers to the component of the diaphragm 30 edge sealing machine used to connect the two layers of diaphragm 30 together. For example, the working end 281 of the cam-type diaphragm 30 edge sealing machine is a cam.

[0159] Optionally, there are two image acquisition terminals 291, which are located on both sides of the working end 281 of the diaphragm 30 edge sealing machine along the conveying direction of the composite material belt A40.

[0160] In this embodiment, by setting up the correction device 29, the position information of the interval part relative to the working end 281 of the diaphragm 30 edge sealing machine can be used to control the conveying speed of the composite material belt A40, thereby ensuring the control closed loop of the correction operation. This effectively ensures the correspondence between the interval part and the working section of the diaphragm 30 edge sealing machine, thus effectively ensuring the accuracy of the hot melt joint position.

[0161] Please see Figure 11 , Figure 11 This is a schematic diagram showing the positional relationship between the image acquisition end 291 and the working end 281 of the diaphragm 30 sealing machine according to an embodiment of this application. In one embodiment, the distance W2 between the image acquisition end 291 and the working end 281 of the diaphragm sealing mechanism 28 is 1 to 3 center-to-center distances. The center-to-center distance is the center-to-center distance between two adjacent composite sheets 400 when the composite strip A40 is in a flattened state.

[0162] It is understood that the distance W2 between the image acquisition end 291 and the working end 281 of the diaphragm sealing mechanism 28 includes, but is not limited to, 1 center-to-center distance, 1.5 center-to-center distance, 2 center-to-center distance, 2.2 center-to-center distance, 2.8 center-to-center distance, and 3 center-to-center distance.

[0163] In this embodiment, by limiting the distance as described above, on the one hand, the distance can be avoided from being too small, thereby providing sufficient adjustment time for the correction device 29 to control the conveying speed of the composite material belt A40 according to the position information; on the other hand, the distance can be avoided from being too large, thereby avoiding missing the position information of a certain partition relative to the working end 281 of the diaphragm 30 sealing machine.

[0164] In one embodiment, the first feeding mechanism 22 comprises a first unwinding assembly 221, a first tab die-cutting assembly 222, and a first tab cutting assembly 223. The first unwinding assembly 221 is configured to mount the first tab roll 60. The first tab die-cutting assembly 222 is configured to cut the empty foil area of the first tab roll 60 from the first unwinding assembly 221 to form the first tab. The first tab cutting assembly 223 is configured to cut the first tab roll 60 after being cut by the first tab die-cutting assembly 222 to form the first tab 10. In this way, the first feeding mechanism 22 is simple and easy to manufacture.

[0165] In one embodiment, the power source for moving the first tab 10 from the first feeding mechanism to contact with the separator 30 can be the first feeding mechanism, or the first heat load mechanism, or a tab feeding device configured to feed the first tab roll 60 from the first unwinding assembly 221 between the two layers of the separator 30.

[0166] Referring to Figure 8 In some embodiments, the second feeding mechanism 25 comprises a second unwinding assembly 251, a second tab die-cutting assembly 252, a second tab cutting assembly 253, and a second tab feeding device 254. The second unwinding assembly 251 is configured to mount the second tab roll 70. The second tab die-cutting assembly 252 is configured to cut the empty foil area of the second tab roll 70 from the second unwinding assembly 251 to form the second tab. The second tab cutting assembly 253 is configured to cut the second tab roll 70 after being cut by the second tab die-cutting assembly 252 to form the second tab 20. The second tab feeding device 254 is configured to feed the second tab roll 70 from the second unwinding assembly 251 to the second tab die-cutting assembly 252, the second tab cutting assembly 253, and the composite tape B50 in sequence. In this way, the second feeding mechanism 25 is simple and easy to manufacture.

[0167] Referring to Figure 8 In one embodiment, the laminating machine 2 further comprises a material guiding mechanism 300. The forming device 21 is configured to transport the composite tape A40 in a direction parallel to the horizontal plane. The material guiding mechanism 300 is located above the receiving station 14. The material guiding mechanism 300 is configured to guide the composite tape A40 from the forming device 21 to the carrying surface 111 of the receiving station 14 in the second direction.

[0168] It can be understood that when guiding the composite tape A40 to the carrying surface 111 of the receiving station 14 in the second direction, the composite tape A40 can be moved by gravity, thereby reducing power consumption and reducing the difficulty of stacking the composite tab 400 on the carrying surface 111.

[0169] If the molding device 21 is fed in the second direction, the height dimension of the molding device 21 will be large. This not only causes difficulty in arranging the molding device 21, but also causes poor maintenance convenience.

[0170] Therefore, in the embodiment, the molding device 21 is transmitted in a direction parallel to the horizontal plane, and a material guiding mechanism 300 is arranged between the molding device 21 and the lamination table 1, so that the composite material belt A40 is guided in the second direction to the bearing surface 111 at the material receiving station 14. In this way, not only can the height dimension of the molding device 21 be reduced to reduce the difficulty of arranging the molding device 21 and improve the maintenance convenience, but also the composite material belt A40 can be guided in the second direction to the bearing surface 111 at the material receiving station 14, so that the power consumption can be reduced, and the smoothness of stacking the composite material pieces 400 on the bearing surface 111 can be improved.

[0171] Please refer to Figure 8 In an embodiment, the material guiding mechanism 300 includes a plurality of drive roller groups 301. The plurality of drive roller groups 301 are arranged at intervals in the second direction. Each drive roller group 301 includes two drive rollers 302 arranged at intervals in the first direction. The distance between the two drive rollers 302 of each drive roller group 301 is used to transmit the composite material belt A40. In this way, the stability of the transmission of the composite material belt A40 can be improved.

[0172] Alternatively, the material guiding mechanism 300 includes two drive roller groups 301.

[0173] Please refer to Figure 12 , Figure 12 is a schematic view of the positional relationship between the material guiding mechanism 300 and the bearing surface 111 provided by the embodiment of the present application. In an embodiment, the material guiding mechanism 300 has a first end 303 facing the bearing surface 111, and the distance W3 between the first end 303 and the bearing surface 111 is 1.5-2 center distances. The center distance is the center distance between adjacent two composite material pieces 400 when the composite material belt A40 is in a flattened state.

[0174] It can be understood that the distance W3 between the end of the material guiding mechanism 300 facing the bearing surface 111 and the bearing surface 111 includes but is not limited to 1.5 center distances, 1.6 center distances, 1.7 center distances, 1.8 center distances, and 2 center distances.

[0175] In the embodiment, by limiting the distance W3 between the end of the material guiding mechanism 300 facing the bearing surface 111 and the bearing surface 111, the falling height of the composite material pieces 400 can be avoided from being insufficient, and the falling height of the composite material pieces 400 can be avoided from being too large to deviate from the preset falling position. In this way, the neatness of stacking the composite material pieces 400 can be improved.

[0176] In an embodiment, the first feeding mechanism 22 is configured to provide the negative electrode sheet. The second feeding mechanism 25 is configured to provide the positive electrode sheet.

[0177] It can be understood that the active material layer of the positive electrode sheet adopts an oily binder, and thus the surface of the positive electrode sheet is relatively smooth, which is easy to be heat-welded with the separator 30. The active material layer of the negative electrode sheet adopts an aqueous binder, and the negative electrode sheet is mainly composed of layered graphite, and the peeling force between the active material and the foil is lower than that of the positive electrode. Therefore, the peeling force between the negative electrode sheet and the separator 30 is much lower than that between the positive electrode sheet and the separator 30.

[0178] Based on this, the embodiment first composites the negative electrode sheet with the upper and lower separators 30, and then composites the negative electrode sheet with the upper and lower separators 30 again based on the heat-welding between the positive electrode sheet and the separator 30, so as to improve the reliability of the connection between the negative electrode sheet and the separator 30.

[0179] In an embodiment, the stacking machine 2 further comprises a material line detection camera 31. The material line detection camera 31 detects whether the positive and negative electrode ears of the composite material belt A40 are folded. If so, an alarm is started to remind the relevant operator to handle.

[0180] Please refer to Figure 13 , Figure 13 is a flowchart of the stacking method provided by the embodiments of the present application. Accordingly, the embodiments of the present application provide a stacking method. The method is applied to the stacking of the composite material belt A40 on the stacking table 1 provided by some embodiments of the present application, and the composite material belt A40 comprises a plurality of composite material sheets 400 connected in sequence by the separators 30.

[0181] The stacking method comprises:

[0182] S100, conveying the composite material belt A40 to the bearing surface 111 of the sub-stacking table 11 located at the material receiving station 14, and making the adjacent two composite material sheets 400 stacked in sequence along the direction perpendicular to the bearing surface 111;

[0183] S200, when the number of the composite material sheets 400 stacked by the sub-stacking table 11 located at the material receiving station 14 reaches a preset value, moving a plurality of sub-stacking tables 11 along a first direction, so that the sub-stacking table 11 whose number of the composite material sheets 400 carried by the bearing surface 111 reaches the preset value is located at one side of the material receiving station, and another sub-stacking table 11 is located at the material receiving station 14;

[0184] S300, when at least one composite material sheet 400 falls on the bearing surface 111 of the sub-stacking table 11 located at the material receiving station 14, cutting the part of the separator 30 between the two adjacent sub-stacking tables 11 by the cutting mechanism 15.

[0185] The following will take the lamination station 1 including two sub-lamination stations 11 as an example to specifically describe the lamination method. For the convenience of description, the two sub-lamination stations 11 are respectively a first sub-lamination station 12 and a second sub-lamination station 13.

[0186] Please refer to Figures 14-17 , the lamination method comprises:

[0187] The composite material tape A40 is conveyed to the bearing surface 111 of the first sub-lamination station 12 located at the material receiving station 14, and the adjacent two composite material pieces 400 are stacked in turn along the direction perpendicular to the bearing surface 111, as shown in Figure 14 ;

[0188] When the number of the composite material pieces 400 stacked in the first sub-lamination station 12 located at the material receiving station 14 reaches a preset value n (n is a positive integer, and n≥1), the two sub-lamination stations 11 are moved along the first direction, so that the first sub-lamination station 12 is located at one side of the material receiving station 14, and the second sub-lamination station 13 is located at the material receiving station 14; at this time, the n+1th composite material piece 400 falls onto the bearing surface 111 of the second sub-lamination station 13 under the movement of the first sub-lamination station 12. As shown in Figure 15 , wherein as the composite material pieces 400 continuously fall into the first sub-lamination station 12, the lifting mechanism 113 of the first sub-lamination station 12 drives the bearing plate 112 of the first sub-lamination station 12 to continuously descend, so that the falling height of the composite material pieces 400 from the material guide mechanism 300 is consistent.

[0189] When at least one composite material piece 400 is located on the bearing surface 111 of the second lamination station 1, the part of the diaphragm 30 between the first sub-lamination station 12 and the second sub-lamination station 13 is cut off by the cutting mechanism 15, as shown in Figure 16 .

[0190] It can be understood that after the part of the diaphragm 30 between the first sub-lamination station 12 and the second sub-lamination station 13 is cut off, the composite material pieces 400 stacked on the first sub-lamination station 12 are transferred to the next station; at the same time, the composite material pieces 400 continue to be stacked on the second sub-lamination station 13, as shown in Figure 17 . When the number of the composite material pieces 400 stacked on the second sub-lamination station 13 reaches the preset value n, the two sub-lamination stations 11 are simultaneously moved in the opposite direction, so that the second sub-lamination station 13 is located at one side of the material receiving station 14, and the 2n+1th composite material piece 400 falls onto the bearing surface 111 of the first sub-lamination station 12 under the movement of the second sub-lamination station 13. At this time, the first sub-lamination station 12 is located at the material receiving station 14 for receiving material, as shown in Figure 18 . Wherein as the composite material pieces 400 continuously fall into the second sub-lamination station 13, the lifting mechanism 113 of the second sub-lamination station 13 drives the bearing plate 112 of the second sub-lamination station 13 to continuously descend, so that the falling height of the composite material pieces 400 from the material guide mechanism 300 is consistent.

[0191] Then, the part of the diaphragm 30 between the first sub-stacking table 12 and the second sub-stacking table 13 is cut off by the cutting mechanism 15.

[0192] In the embodiment, by the above stacking method, the plurality of sub-stacking tables 11 are sequentially arranged along the first direction and are moved along the first direction to be sequentially located at the receiving station 14, so that the composite material strip A40 carried by the sub-stacking table 11 located at the receiving station 14 last time can be guided by the movement of the sub-stacking table 11 located at the receiving station 14 first time. In this way, the position controllability of the composite material strip A40 carried by the sub-stacking table 11 can be effectively ensured, and additional guiding operation is not required, so that the stacking efficiency of the stacked electrode assembly can be improved.

[0193] The above describes the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples; the above embodiment descriptions are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed; in conclusion, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A stacking stage, characterized in that, include: Multiple sub-stacking platforms are arranged sequentially along a first direction. Each sub-stacking platform has a bearing surface for bearing composite material strip A. The multiple sub-stacking platforms have a shared receiving station. Moving the multiple sub-stacking platforms along the first direction allows the multiple sub-stacking platforms to take turns being located at the receiving station. A cutting mechanism configured to cut the portion of the composite strip A located between two adjacent sub-stacking platforms; The cutting mechanism includes a cutter connected to it and a second drive assembly. The second drive assembly drives the cutter to reciprocate along a second direction, which is perpendicular to the bearing surface. The cutter is configured to cut the portion of the composite strip A located between two adjacent sub-stacking platforms. The cutting mechanism further includes a pressure knife and a third drive assembly. The third drive assembly is connected to the pressure knife and the second drive assembly, and the third drive assembly drives the pressure knife and the second drive assembly to reciprocate along the second direction. The pressure knife is configured to press down on the composite material strip A located at the receiving station.

2. The stacking stage according to claim 1, characterized in that, The sub-stacking platform includes: The support plate has the aforementioned support surface; A lifting mechanism is connected to the support plate, and the lifting mechanism is used to adjust the height position of the support surface.

3. The stacking stage according to claim 2, characterized in that, The sub-stacking platform also includes a fixed baffle, which is fixed relative to the lifting mechanism. The fixed baffles of two adjacent sub-stacking platforms along the first direction are arranged adjacent to each other. Specifically, when the bearing plate is at its lowest position, the fixed baffle is at least partially located on the side of the bearing surface closest to the composite strip A; when the bearing plate is at its highest position, the fixed baffle does not extend beyond the bearing surface.

4. The stacking stage according to claim 3, characterized in that, When the first direction is a straight line, the sub-stacking platform located at the beginning and end of the first direction further includes a synchronization baffle. For each of the sub-stacking platforms located at the beginning and end of the first direction, the synchronization baffle is connected to the bearing plate and is located at least partially on the side of the bearing surface close to the composite strip A. The synchronization baffle of the sub-stacking platform located at the beginning and end is disposed away from the adjacent sub-stacking platform.

5. The stacking stage according to any one of claims 1-4, characterized in that, The distance between the pressing knife and the adjacent edge of the bearing surface located at the receiving station is 2mm to 6mm.

6. The stacking stage according to any one of claims 1-4, characterized in that, The stacking stage also includes a shifting drive assembly, which is connected to multiple sub-stacking stages. The shifting drive assembly drives one of the sub-stacking stages located at the receiving station to move to one side of the receiving station, and simultaneously drives another sub-stacking stage to move to the receiving station.

7. The stacking stage according to any one of claims 1-4, characterized in that, There are two cutting mechanisms. Along the first direction, the two cutting mechanisms are located on both sides of the receiving station, and along the feeding direction of the composite material strip A, the structures of the two cutting mechanisms are symmetrical to each other.

8. The stacking stage according to any one of claims 1-4, characterized in that, There are two sub-stacking platforms. The two sub-stacking platforms can be moved back and forth along the first direction so that the two sub-stacking platforms are located at the receiving station in turn.

9. A stacking machine, characterized in that, include: A forming device is used to form the composite strip A, wherein the composite strip A comprises a plurality of composite sheets connected in sequence by diaphragms; And, the stacking stage as described in any one of claims 1-8; The composite strip A output by the forming device moves toward the bearing surface along a second direction, which is perpendicular to the bearing surface.

10. The stacking machine according to claim 9, characterized in that, The molding apparatus includes: The first feeding mechanism is used to supply the first electrode sheet; Two diaphragm feeding mechanisms are configured to supply diaphragms to both sides of the first electrode, respectively; A first thermal bonding mechanism is used to heat at least one of the diaphragm and the first electrode, and to press the diaphragm and the first electrode together to form a composite strip B; Two second feeding mechanisms are configured to supply second electrode sheets to both sides of the composite strip B respectively, and the two second feeding mechanisms alternately feed materials in sequence; The second thermal bonding mechanism is used to heat at least one of the composite strip and the second electrode, and to press the second electrode with the composite strip B to form the composite strip A.

11. The stacking machine according to claim 10, characterized in that, The first thermal bonding mechanism includes a first heating component and a first pressure roller assembly. The first heating component is used to heat the first electrode sheet, and the first pressure roller assembly is used to press the diaphragm and the heated first electrode sheet together.

12. The stacking machine according to claim 10, characterized in that, The second thermal bonding mechanism includes a second heating component and a second pressure roller assembly. The second heating component is used to heat the second electrode sheet, and the second pressure roller assembly is used to press the composite strip B with the heated second electrode sheet. There are two second heating components, which are respectively located near the discharge ports of the two second feeding mechanisms.

13. The stacking machine according to claim 12, characterized in that, The forming device further includes a heating and heat preservation component, which is disposed between the second feeding mechanism and the second pressure roller assembly. The heating and heat preservation component is used to keep the second electrode sheet, which is in contact with and heated by the composite strip B, warm.

14. The stacking machine according to any one of claims 10-13, characterized in that, The heating method of the first thermal composite mechanism and / or the second thermal composite mechanism is any one of the following heating methods: electric heating, magnetic field heating, and heat exchange plate heating.

15. The stacking machine according to any one of claims 10-13, characterized in that, The forming device further includes a diaphragm sealing mechanism, which is located between the outlet of the first thermal bonding mechanism and the second feeding mechanism. The diaphragm sealing mechanism is used to connect the portions of the two diaphragms located between two adjacent first electrodes.

16. The stacking machine according to claim 15, characterized in that, The forming device also includes a correction device. The portion of the diaphragm located between two adjacent first electrodes is a gap portion. The correction device collects the position information of the gap portion relative to the working end of the diaphragm sealing mechanism and controls the conveying speed of the composite material belt A according to the position information.

17. The stacking machine according to claim 16, characterized in that, The correction device includes an image acquisition terminal for acquiring the location information; Wherein, the image acquisition end is a CCD vision camera, and / or, the distance between the image acquisition end and the working end of the diaphragm sealing mechanism is 1 to 3 center distances, wherein the center distance is the center distance between two adjacent composite sheets when the composite strip A is in a flattened state.

18. The stacking machine according to any one of claims 10-13, characterized in that, The first feeding mechanism includes a first unwinding assembly, a first electrode tab die-cutting assembly, and a first electrode sheet cutting assembly; the first unwinding assembly is used to mount the first electrode sheet roll, and the first electrode tab die-cutting assembly is used to cut the empty foil area of ​​the first electrode sheet roll from the first unwinding assembly to form the first electrode tab; The first electrode cutting assembly is used to cut the first electrode roll after it has been cut by the first electrode tab die-cutting assembly to form the first electrode; And / or, The second feeding mechanism includes a second unwinding assembly, a second electrode ear die-cutting assembly, a second electrode sheet cutting assembly, and a second sheet feeding device; the second unwinding assembly is used to mount the second electrode sheet roll, and the second electrode ear die-cutting assembly is used to cut the empty foil area of ​​the second electrode sheet roll from the second unwinding assembly to form the second electrode ear; The second electrode cutting assembly is used to cut the second electrode after it has been cut by the second electrode die-cutting assembly to form the second electrode. The second feeding device sequentially delivers the second electrode roll from the second unwinding assembly to the second electrode ear die-cutting assembly, the second electrode cutting assembly, and the composite strip B.

19. The stacking machine according to any one of claims 9-13, characterized in that, The stacking machine also includes a material guiding mechanism; the forming device transmits the composite material strip A in a direction parallel to the horizontal plane; the material guiding mechanism is located above the receiving station, and along the second direction, the material guiding mechanism guides the composite material strip A from the forming device to the bearing surface located at the receiving station and stacks it.

20. The stacking machine according to claim 19, characterized in that, The material guiding mechanism includes multiple drive roller groups, which are spaced apart along the second direction. Each drive roller group includes two drive rollers spaced apart along the first direction. The distance between the two drive rollers in each drive roller group is used to transmit the composite material belt A. And / or, The material guiding mechanism has a first end facing the bearing surface located at the receiving station. The distance between the first end and the bearing surface is 1.5 to 2 center-to-center distances. The center-to-center distance is the center-to-center distance between two adjacent composite sheets when the composite strip A is in a flattened state.

21. The stacking machine according to any one of claims 10-13, characterized in that, The first feeding mechanism is used to provide the negative electrode sheet; the second feeding mechanism is used to provide the positive electrode sheet.

22. A stacking method, characterized in that, Application to stacking composite strip A on a stacking table as described in any one of claims 1-8, wherein the composite strip A comprises a plurality of composite sheets connected in sequence by diaphragms; The stacking method includes: The composite strip A is conveyed to the bearing surface of the sub-stacking platform located at the receiving station, and two adjacent composite sheets are stacked sequentially in a direction perpendicular to the bearing surface. When the number of composite sheets stacked on the sub-stacking platform at the receiving station reaches a preset value, multiple sub-stacking platforms are moved along the first direction, such that the sub-stacking platform on which the number of composite sheets supported by the bearing surface reaches the preset value is located on one side of the receiving station, while another sub-stacking platform is located at the receiving station. When at least one of the composite sheets falls onto the bearing surface of the sub-stacking platform located at the receiving station, the portion of the diaphragm located between two adjacent sub-stacking platforms is cut by the cutting mechanism.

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