Lamination Component, Laminator and Method for Coating Lithium on Electrode Sheet

Abstract

The present invention discloses a composite component, a laminating machine and a method for coating a lithium film on a pole piece. The composite component includes a lithium strip conveying roller, a rolling component and a laminating roller; the rolling component includes a first rolling roller, the first rolling roller is arranged on one side of the lithium strip conveying roller, and a gap between the first rolling roller and the lithium strip conveying roller forms a first channel for the lithium strip to pass through or for the lithium strip and a first isolation structure to pass through. The first isolation structure is used to contact the other side of the lithium strip and wind around the roller surface of the first rolling roller; the laminating roller is arranged on the other side of the lithium strip conveying roller, and a gap between the laminating roller and the lithium strip conveying roller forms a second channel for the lithium strip and the pole piece to pass through. During the operation of the composite component, the lithium strip passes through the first channel, bypasses the roller surface of the lithium strip conveying roller, and enters the second channel, simplifying the structure of the composite component and shortening the conveying time for lithium strip rolling and pole piece lithium coating. The present invention can be widely applied to the technical field of pole piece lithium coating equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of pole piece lithium coating equipment, and particularly relates to a composite component, a composite machine, and a pole piece lithium coating method. Background Art

[0002] Pole piece lithium coating is an important process in lithium battery production. Usually, a lithium strip and a pole piece are simultaneously sent to a composite pressing roller group for roll pressing and composite coating, and the pressing roller coats the lithium strip on the surface of the pole piece. The accuracy of the lithium strip on the surface of the pole piece processed by this composite coating method is low. To solve this problem, the composite machine performs calendering on the lithium strip before composite coating. The composite machine uses a roller group to extrude the lithium strip to form a tensile force inside the lithium strip.

[0003] However, currently, for manufacturers to complete processes such as calendering and pole piece lithium coating, the designed composite machine equipment has a complex structure, a large number of roller parts, a complex structure, and a high equipment cost. On the other hand, during calendering, the lithium strip is extruded by the roller group, and it is easy to have friction between the lithium strip and the roller surface of the roller group, resulting in adhesion between the lithium strip and the roller group, or powder falling off the surface of the lithium strip. Summary of the Invention

[0004] To solve at least one of the above technical problems, the present invention provides a composite component, a composite machine, and a pole piece lithium coating method, and the technical solutions adopted are as follows.

[0005] The composite component provided by the present invention includes a lithium strip conveying roller, a calendering component, and a composite roller. One side surface of the lithium strip is wound around the roller surface of the lithium strip conveying roller; the calendering component includes a first pressing roller, the first pressing roller is arranged on one side of the lithium strip conveying roller, and a gap between the first pressing roller and the lithium strip conveying roller forms a first channel for the lithium strip to pass through or for the lithium strip and a first isolation structure to pass through. The first isolation structure is used to contact the other side surface of the lithium strip and is wound around the roller surface of the first pressing roller; the composite roller is arranged on the other side of the lithium strip conveying roller, the pole piece is wound around the roller surface of the composite roller, and a gap between the composite roller and the lithium strip conveying roller forms a second channel for the lithium strip and the pole piece to pass through.

[0006] In some embodiments of the present invention, the roller surface of the lithium strip conveying roller allows the lithium strip passing through the first channel to enter the second channel after winding around. That is, during the operation of the composite component, the lithium strip passes through the first channel and winds around the roller surface of the lithium strip conveying roller, and then enters the second channel. After the lithium strip winds around the lithium strip conveying roller, it can enter the second channel for composite coating. The position where the lithium strip is calendered in the first channel is close to the position where it is composite coated in the second channel, so that when the lithium strip reaches the composite coating position in the second channel, it can avoid the loss of the temporarily increased temperature generated after calendering, and the temporarily increased temperature can be utilized for the composite coating of the lithium strip and the pole piece, improving the composite coating effect.

[0007] In some embodiments of the present invention, the lamination assembly includes a first adjustment assembly for adjusting the center distance between the first pressing roller and the lithium tape conveying roller. The first adjustment assembly includes a second pushing member and a second driver, and the second driver drives the second pushing member to move. Under the action of the second pushing member, the relative distance between the rolling assembly and the lithium tape conveying roller increases.

[0008] In some embodiments of the present invention, the first adjustment assembly includes a first abutting seat connected to the rolling assembly. The second driver drives the second pushing member to move in a first direction so that the second pushing member pushes the first abutting seat, thereby moving the rolling assembly away from the lithium tape conveying roller. The first abutting seat has a first abutting surface inclined with respect to the first direction, and the second pushing member has a second abutting surface inclined with respect to the first direction. The second abutting surface abuts against the first abutting surface.

[0009] In some embodiments of the present invention, the lamination assembly includes a first driver adapted to drive the rolling assembly to move in a second direction so that the first pressing roller presses the lithium tape on the roller surface of the lithium tape conveying roller.

[0010] In some embodiments of the present invention, the rolling assembly includes a second pressing roller, the roller surface of the second pressing roller is in rolling contact with the roller surface of the first pressing roller, and the diameter of the first pressing roller is smaller than that of the lithium tape conveying roller.

[0011] In some embodiments of the present invention, the lamination assembly includes a first oiling mechanism for oiling the side of the lithium tape facing the lithium tape conveying roller, or the first oiling mechanism is used to oil the two opposite sides of the lithium tape respectively. The lamination assembly includes a second oiling assembly, and the second oiling assembly includes a second oiling roller for coating the side of the first isolation structure in contact with the lithium tape with oil.

[0012] The laminator provided by the present invention includes a lamination assembly.

[0013] In some embodiments of the present invention, two lamination assemblies are provided, and the two lamination assemblies respectively perform lithium lamination on the two opposite surfaces of the pole piece.

[0014] In some embodiments of the present invention, the laminator includes a second winding assembly that provides a second isolation structure to one of the lamination assemblies. One side surface of the second isolation structure is wound around the roller surface of the lamination roller, and the other side surface of the second isolation structure is used to contact the side surface of the pole piece laminated with the lithium tape.

[0015] The lithium-coated pole piece method provided by the present invention is realized by a laminating machine. The laminating machine includes a laminating assembly, and the laminating assembly includes a lithium strip conveying roller, a rolling assembly, and a laminating roller. The rolling assembly includes a first rolling roller. A first channel for the lithium strip and the first isolation structure to pass through is formed by the gap between the first rolling roller and the lithium strip conveying roller. A second channel for the lithium strip and the pole piece to pass through is formed by the gap between the lithium strip conveying roller and the laminating roller. During the operation of the laminating assembly, there is a differential speed between the tangential speed of the roller surface of the first rolling roller and the tangential speed of the roller surface of the lithium strip conveying roller.

[0016] The embodiments of the present invention have at least the following beneficial effects: In the laminating assembly, the first rolling roller and the laminating roller are respectively arranged on both sides of the lithium strip conveying roller. The lithium strip is wound around the roller surface of the lithium strip conveying roller and can be subjected to rolling treatment and pole piece lithium coating successively. Therefore, a set of roller groups composed of the first rolling roller, the lithium strip conveying roller, and the laminating roller can be used to realize rolling and pole piece lithium coating, simplify the structures required for rolling and pole piece lithium coating, shorten the conveying time of the lithium strip between rolling and pole piece lithium coating, and utilize the frictional heat generated during the rolling of the lithium strip by the first rolling roller and the lithium strip conveying roller to briefly increase the temperature of the lithium strip, which helps with pole piece lithium coating. During the rolling treatment, a first isolation structure is input between the first rolling roller and the lithium strip to prevent the lithium strip and the powder on the surface of the lithium strip from adhering to the roller surface of the first rolling roller. The present invention can be widely applied to the technical field of pole piece lithium coating equipment. Description of the Drawings

[0017] The aspects and advantages described and / or appended in the embodiments of the present invention will become obvious and easy to understand in conjunction with the following drawings. It should be noted that the embodiments shown in the following drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0018] Figure 1-1 It is a structural schematic diagram of the laminating machine, and two laminating assemblies are shown in the figure.

[0019] Figure 1-2 It is a schematic diagram of two laminating assemblies respectively coating lithium on opposite sides of the pole piece.

[0020] Figure 1-3 It is a structural schematic diagram of the laminating machine, and one laminating assembly is shown in the figure.

[0021] Figure 2-1 It is a structural diagram of the laminating assembly.

[0022] Figure 2-2 It is a structural diagram of the first adjustment assembly.

[0023] Figure 3-1 It is a structural diagram of the first oiling mechanism.

[0024] Figure 3-2 It is a structural diagram of the first oiling mechanism.

[0025] Figure 3-3 Structural diagram of the first oiling roller, auxiliary oiling roller, first oil storage plate and first oil storage side baffle.

[0026] Figure 3-4 Schematic diagram of the relative position relationship of two first oiling rollers.

[0027] Figure 4-1 Structural diagram of the second oiling assembly.

[0028] Figure 4-2 Structural diagram of the second oil storage assembly.

[0029] Figure 4-3 Structural diagram of the second oiling assembly, showing two auxiliary pressing rollers in the figure.

[0030] Reference numerals:

[0031] 1101, lithium strip conveying roller; 1102, fixed seat;

[0032] 1201, first pressing roller; 1202, second pressing roller; 1203, calendering mounting seat;

[0033] 1301, laminating roller;

[0034] 1400, first adjusting assembly; 1401, second pushing member; 1402, second driver; 1403, first abutting seat;

[0035] 1500, first driver;

[0036] 2000, first oiling mechanism;

[0037] 2100, first oiling roller;

[0038] 2201, first oil storage plate; 2202, first mounting seat; 2203, first oil storage side baffle; 2204, first baffle guiding structure;

[0039] 2300, auxiliary oiling roller; 2301, first oil storage area;

[0040] 2401, first pushing member; 2402, first moving member;

[0041] 2501, oil receiving tank; 2502, second adjusting assembly;

[0042] 3000, second oiling assembly;

[0043] 3100, second oiling roller;

[0044] 3200, the second oil storage component; 3201, the second oil storage chamber; 3202, the second oil storage side baffle

[0045] 3301, the auxiliary pressure roller; 3302, the fourth driver

[0046] 4101, the first unwinding roller; 4102, the first rewinding roller

[0047] 4201, the second unwinding roller; 4202, the second rewinding roller

[0048] 4301, the third unwinding roller; 4302, the third rewinding roller

[0049] 4501, the fifth unwinding roller Detailed implementation manners

[0050] The following will combine Figures 1-1 to 4-3 to describe the embodiments of the present invention in detail. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention

[0051] In the description of the present invention, it should be understood that if terms such as "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation of the present invention. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more

[0052] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances

[0053] The present invention relates to a lamination assembly. The lamination assembly includes a lithium strip conveying roller 1101 and a lamination roller 1301. The lithium strip conveying roller 1101 and the lamination roller 1301 are arranged adjacent to each other, and the rotation center lines of the lithium strip conveying roller 1101 and the lamination roller 1301 are arranged in parallel. Specifically, one side surface of the lithium strip is wound around the roller surface of the lithium strip conveying roller 1101, and the roller surface of the lithium strip conveying roller 1101 is in rolling contact with the side surface of the lithium strip to realize the conveyance of the lithium strip. The electrode sheet is wound around the roller surface of the lamination roller 1301, and the lamination roller 1301 is used to laminate the electrode sheet and the lithium strip. The roller surface of the lamination roller 1301 is in rolling contact with the side surface of the electrode sheet to realize the conveyance and extrusion of the electrode sheet by the lamination roller 1301. It can be understood that under the extrusion of the lamination roller 1301 and the lithium strip conveying roller 1101, the electrode sheet and the lithium strip are laminated.

[0054] Further, the lamination assembly includes a calendering assembly. The calendering assembly includes a first calender roller 1201. The roller surface of the first calender roller 1201 rolls and extrudes the side surface of the lithium strip, and the first calender roller 1201 is used to calender the lithium strip. Specifically, the first calender roller 1201 is arranged adjacent to the lithium strip conveying roller 1101, and the rotation center line of the first calender roller 1201 is arranged in parallel with the rotation center line of the lithium strip conveying roller 1101.

[0055] Combined with the attached drawings, the first calender roller 1201 is arranged on one side of the lithium strip conveying roller 1101, and the lamination roller 1301 is arranged on the other side of the lithium strip conveying roller 1101. The lithium strip conveying roller 1101 is located between the first calender roller 1201 and the lamination roller 1301. Specifically, the gap between the first calender roller 1201 and the lithium strip conveying roller 1101 forms a first channel, and the gap between the lamination roller 1301 and the lithium strip conveying roller 1101 forms a second channel.

[0056] Specifically, the roller surface of the lithium strip conveying roller 1101 is for the lithium strip passing through the first channel to bypass and then enter the second channel. It can be understood that during the operation of the lamination assembly, the lithium strip passes through the first channel and bypasses the roller surface of the lithium strip conveying roller 1101, and then the lithium strip enters the second channel.

[0057] When the lithium strip is conveyed to the first channel, one side surface (A surface) of the lithium strip is wound around the lithium strip conveying roller 1101, the first calender roller 1201 calenders the other side surface (B surface) of the lithium strip. The lithium strip passes through the first channel. After the lithium strip is calendered, the lithium strip conveying roller 1101 conveys the lithium strip to the second channel. The lamination roller 1301 conveys the electrode sheet to the second channel. The lithium strip and the electrode sheet pass through the second channel, and under the action of the lamination roller 1301 and the lithium strip conveying roller 1101, the B surface of the lithium strip is laminated with the electrode sheet.

[0058] It should be noted that the so-called "A surface" and "B surface" are only for distinguishing two opposite side surfaces of the film material for the convenience of description, rather than specifically referring to a certain side surface of the film material must be the A surface.

[0059] It can be understood that in the composite component designed by the present invention, there is no need to set two sets of independent pressure roller groups to roll the lithium strip and laminate the pole piece respectively. The first pressure roller 1201 and the lamination roller 1301 are respectively arranged on both sides of a lithium strip conveying roller 1101. The lithium strip passes through the first channel and the second channel in sequence, and the lithium strip realizes the rolling process and the lamination of the pole piece and the lithium strip on the lithium strip conveying roller 1101 successively, reducing the number of rollers in the equipment and simplifying the equipment structure.

[0060] On the other hand, the surface temperature of the lithium strip after the rolling process can be briefly increased, which is more conducive to the lamination of the lithium strip and the pole piece. In this case, the composite component is designed to complete rolling and lithium coating on the pole piece successively on both sides of a lithium strip conveying roller 1101, which can shorten the interval time between the rolling and lamination of the lithium strip, avoid the loss of the briefly increased temperature on the lithium strip, and is beneficial to the lithium coating on the pole piece.

[0061] Furthermore, the composite component is provided with a first isolation structure. The first isolation structure passes through the first channel, and the first isolation structure is located between the first pressure roller 1201 and the lithium strip. When the A side of the lithium strip is wound around the roller surface of the lithium strip conveying roller 1101, the first isolation structure is used to contact the other side B surface of the lithium strip. The first isolation structure is wound around the roller surface of the first pressure roller 1201, and the first isolation structure is used to prevent the lithium strip and the powder on the lithium strip from adhering to the roller surface of the first pressure roller 1201.

[0062] In some examples, the first isolation structure is set as an isolation film. Specifically, the first isolation structure is set as a PET film. Of course, as an alternative solution, the first isolation structure can also be designed as other film materials with a smooth surface and not easily adhered to the lithium strip.

[0063] It can be understood that during the rolling process of the composite component on the lithium strip, the first isolation structure is synchronously wound and unwound. Specifically, the composite component includes a first winding and unwinding component, and the first winding and unwinding component is used to wind and unwind the first isolation structure. The first winding and unwinding component includes a first unwinding roller 4101 and a first winding roller 4102. Furthermore, the first winding roller 4102 is connected to a motor, or both the first winding roller 4102 and the first unwinding roller 4101 are connected to motors.

[0064] As an implementation manner, the composite component includes a third winding and unwinding component, and the third winding and unwinding component is used to wind and unwind the pole piece. Specifically, the third winding and unwinding component includes a third unwinding roller 4301 and a third winding roller 4302, and the third winding roller 4302 is connected to a motor or both the third winding roller 4302 and the third unwinding roller 4301 are connected to motors.

[0065] In some examples, the laminating roller 1301 is connected to a motor. It can be understood that the laminating roller 1301 has rotational power and functions to roll and laminate, transmit power, and tension the pole piece. Of course, as an alternative solution, it can also be designed that the laminating roller 1301 is not connected to the motor. When the third winding assembly winds and unwinds the pole piece, the pole piece drives the laminating roller 1301 to rotate. In this case, the laminating roller 1301 functions to roll and laminate, tension, and redirect and transmit the pole piece.

[0066] As an implementation manner, the laminating assembly includes a fifth unwinding roller 4501, and the fifth unwinding roller 4501 is used to provide lithium tape. Further, the fifth unwinding roller 4501 is connected to a motor.

[0067] In some examples, the lithium tape conveying roller 1101 is connected to a motor. The lithium tape conveying roller 1101 has rotational power, and the rotation speed of the lithium tape conveying roller 1101 can be adjusted by adjusting the power of the motor. Of course, as an alternative solution, it can also be designed that the lithium tape conveying roller 1101 is not connected to the motor. In this case, when the third winding roller 4302 winds the pole piece after lithium coating, the lithium tape drives the lithium tape conveying roller 1101 to rotate.

[0068] As an implementation manner, the laminating assembly includes a first driver 1500. Specifically, the laminating assembly drives the calendering assembly to move along the second direction through the first driver 1500, so that the first calender roller 1201 extrudes the lithium tape on the roller surface of the lithium tape conveying roller 1101, so that a pressure towards the lithium tape conveying roller 1101 can be generated during the rotation of the first calender roller 1201, and the calendering treatment of the lithium tape is realized.

[0069] Specifically, the calendering assembly includes a calendering mounting seat 1203. At least one end of the first calender roller 1201 is rotatably connected to the calendering mounting seat 1203. The calendering mounting seat 1203 is connected to the first driver 1500. The first driver 1500 includes a cylinder or an electric cylinder or a hydraulic cylinder. The first driver 1500 drives the calendering mounting seat 1203 to move, so that the first calender roller 1201 approaches or moves away from the lithium tape conveying roller 1101.

[0070] Further, the laminating assembly includes a first guiding structure. The first guiding structure is arranged along the moving direction of the calendering mounting seat 1203, and the calendering mounting seat 1203 is slidably connected to the first guiding structure. Specifically, the first guiding structure includes at least one guide rail. Of course, as an alternative solution, it can also be designed that in some examples, the first guiding structure includes at least one guide rod; in some examples, the first guiding structure is arranged as at least one chute.

[0071] As an implementation manner, the laminating assembly includes a first adjusting assembly 1400, and the first adjusting assembly 1400 is used to adjust the center distance between the first calender roller 1201 and the lithium tape conveying roller 1101, so as to adjust the width of the first channel.

[0072] It can be understood that the lamination assembly is provided with a first adjusting assembly 1400. On the one hand, it can enable the lamination assembly to adapt to scenarios with different calendering requirements. On the other hand, during the process of the calendering assembly being driven by the first driver 1500 to move, if the structural dimensions of the calendering assembly change or the moving distance of the calendering assembly deviates, resulting in a deviation in the size of the first channel, it can be corrected by the first adjusting assembly 1400.

[0073] Specifically, the first adjusting assembly 1400 includes a second pushing member 1401 and a second driver 1402, and the second pushing member 1401 is connected to the second driver 1402. It can be understood that the second driver 1402 drives the second pushing member 1401 to move, and the second pushing member 1401 acts on the calendering assembly. Under the action of the second pushing member 1401, the relative distance between the calendering assembly and the lithium tape conveying roller 1101 increases, and then the center distance between the first calender roll 1201 and the lithium tape conveying roller 1101 increases.

[0074] Furthermore, the first adjusting assembly 1400 includes a first abutting seat 1403, and the first abutting seat 1403 is connected to the calendering assembly. It can be understood that the first abutting seat 1403 is connected to the calendering mounting seat 1203, and the second pushing member 1401 acts on the calendering assembly by abutting against the first abutting seat 1403. Specifically, the second driver 1402 drives the second pushing member 1401 to move in the first direction, so that the second pushing member 1401 pushes the first abutting seat 1403, and thus the calendering assembly moves away from the lithium tape conveying roller.

[0075] Combined with the attached drawings, the second pushing member 1401 has a second abutting surface, the second abutting surface is located on the side surface of the second pushing member 1401, and the second abutting surface is inclined relative to the first direction. Specifically, the second pushing member 1401 is arranged in an inclined iron structure. The first abutting seat 1403 has a first abutting surface, the first abutting surface is located on the side surface of the first abutting seat 1403, and the first abutting surface is inclined relative to the first direction. Furthermore, the inclination angles of the second abutting surface and the first abutting surface are the same.

[0076] In this case, when the second driver 1402 drives the second pushing member 1401 to move in the first direction, the second abutting surface abuts against the first abutting surface, and the second pushing member 1401 and the first abutting seat 1403 are wedged together, so that the second pushing member 1401 pushes the first abutting seat 1403. The movement of the second pushing member 1401 in the first direction is transformed into the movement of the first abutting seat 1403 in the second direction, so that the calendering assembly moves away from the lithium tape conveying roller 1101, increasing the width of the first channel.

[0077] In some examples, driven by the second driver 1402, the second pusher 1401 rises along the first direction. Under the action of the second pusher 1401, the calendering assembly moves horizontally along the second direction, so that the calendering assembly moves away from the lithium strip conveying roller 1101. In this case, the first abutting surface slopes downward and the second abutting surface slopes upward. It should be noted that the first direction refers to the direction extending along both ends of a straight line, and the second direction refers to the direction extending along both ends of a straight line.

[0078] As an implementation manner, the second driver 1402 drives the second pusher 1401 to move along the first direction in a screw drive manner. Specifically, a transmission rod is provided on the rotating shaft of the second driver 1402, an external thread is provided on the transmission rod, an internal thread structure is provided on the second pusher 1401, and the transmission rod is threadedly connected to the internal thread structure.

[0079] It can be understood that the internal thread structure is set as the threaded hole in the second pusher 1401. Of course, it can also be alternatively designed as: the internal thread structure is set as the moving block connected to the second pusher 1401, and the moving block is provided with a threaded hole.

[0080] Combined with the attached drawings, the laminating assembly includes a fixed seat 1102. The lithium strip conveying roller 1101 is rotatably connected to the fixed seat 1102. The second pusher 1401 is located between the first abutting seat 1403 and the fixed seat 1102. It can be understood that the second abutting surface on one side of the second pusher 1401 acts on the first abutting seat 1403, and the side surface on the other side of the second pusher 1401 acts on the fixed seat 1102.

[0081] Further, the first adjustment assembly 1400 includes a second abutting seat. The second abutting seat is connected to the fixed seat 1102, and the side surface on the other side of the second pusher 1401 abuts against the second abutting seat.

[0082] Of course, regarding the setting of the second pusher 1401, as an alternative solution, it can also be designed as: the second abutting surface on one side of the second pusher 1401 acts on the first abutting seat 1403, and the side surface on the other side of the second pusher 1401 acts on the frame of the laminating assembly. Further, when the second abutting seat is provided in the first adjustment assembly 1400, the second abutting seat is connected to the frame of the laminating assembly.

[0083] Regarding the setting of the second pusher 1401, the first abutting seat 1403 and the second abutting seat, it can also be alternatively designed as: in some examples, the second abutting seat has a first abutting surface, and during the movement of the second pusher 1401 along the first direction, the second abutting surface of the second pusher 1401 abuts against the first abutting surface on the second abutting seat.

[0084] It can be understood that, in order to make the thickness of the lithium strip after rolling even, a second pusher 1401 is designed between the rolling component and the lithium strip conveyor roller 1101 as a blocking structure. During the process of the first driver 1500 driving the first pressing roller 1201 to press towards the lithium strip conveyor roller 1101, the rolling mounting base 1203 simultaneously presses the second pusher 1401 through the first abutting seat 1403. In this case, by moving the second pusher 1401 in the first direction, the width of the first channel can be adjusted to adjust the pressing force of the first pressing roller 1201 on the lithium strip.

[0085] As an implementation method, the diameter of the first pressing roller 1201 is smaller than that of the lithium strip conveyor roller 1101 to improve the rolling accuracy of the first pressing roller 1201. On the other hand, designing a first pressing roller 1201 with a small diameter can also reduce the power required for the operation of the first pressing roller 1201.

[0086] Furthermore, to prevent the first pressing roller 1201 from deforming or swinging due to its small diameter during operation, the rolling component is designed to include a second pressing roller 1202. The second pressing roller 1202 is rotatably connected to the rolling mounting base 1203. The second pressing roller 1202 is arranged adjacent to the first pressing roller 1201. The rotation center line of the second pressing roller 1202 and the rotation center line of the first pressing roller 1201 are arranged in parallel. The roller surface of the second pressing roller 1202 is in rolling contact with the roller surface of the first pressing roller 1201. The second pressing roller 1202 has a rolling effect on the first pressing roller 1201, thereby preventing the first pressing roller 1201 from deforming or swinging.

[0087] Specifically, the included angle between the plane formed by the rotation center line of the first pressing roller 1201 and the rotation center line of the lithium strip conveyor roller 1101 and the plane formed by the rotation center line of the second pressing roller 1202 and the rotation center line of the first pressing roller 1201 is greater than 90° and less than or equal to 180°. In some examples, one side of the roller surface of the first pressing roller 1201 is used for rolling the lithium strip, and the roller surface of the second pressing roller 1202 rolls the roller surface on the other side of the first pressing roller 1201. The rotation center lines of the first pressing roller 1201, the second pressing roller 1202, and the lithium strip conveyor roller 1101 are in the same plane.

[0088] It can be understood that the rolling component includes a rolling driver. The rolling driver includes a motor. The rolling driver outputs power through a rotating shaft or a belt drive. Specifically, the rolling driver is connected to the second pressing roller 1202, and the second pressing roller 1202 is in rolling transmission with the first pressing roller 1201. Combining with the attached drawings, the diameter of the second pressing roller 1202 is larger than that of the first pressing roller 1201 so that the second pressing roller 1202 can drive the first pressing roller 1201. Of course, it can also be designed alternatively as: the rolling driver is connected to the first pressing roller 1201.

[0089] In some examples, the diameter of the second pressing roller 1202 is larger than that of the first pressing roller 1201, which improves the stability when the second pressing roller 1202 rotates, thereby ensuring the stability when the first pressing roller 1201 rotates.

[0090] As an implementation manner, the laminating assembly includes a first oiling mechanism 2000. Before the lithium strip enters the first channel, the first oiling mechanism 2000 is used to coat the side surface of the lithium strip with oil liquid to increase lubrication and reduce friction. Specifically, the first oiling mechanism 2000 includes a first oiling assembly, and the first oiling assembly includes a first oiling roller 2100. The roller surface of the first oiling roller 2100 adheres to the oil liquid, and the roller surface of the first oiling roller 2100 makes rolling contact with the side surface of the lithium strip, thereby coating oil on the side surface of the lithium strip.

[0091] It can be understood that during the calendering process and the lithium coating process of the pole piece, the lithium strip is extruded. To prevent the lithium strip from adhering to the lithium strip conveying roller 1101 and prevent the powder on the lithium strip from falling off, the first oiling mechanism 2000 is used to coat the side surface of the lithium strip facing the lithium strip conveying roller 1101 with oil. In this case, the first oiling assembly is set to one.

[0092] In some examples, considering that the two sides of the lithium strip are respectively in contact with the first isolation structure and the lithium strip conveying roller 1101, the first oiling mechanism 2000 needs to coat the two opposite side surfaces of the lithium strip with oil liquid respectively. It can be understood that coating oil on the side surface of the lithium strip facing the first isolation structure can further prevent the lithium strip or the powder on the lithium strip from adhering to the first isolation structure during the calendering process.

[0093] In this case, the first oiling assembly is set to two. The lithium strip passes through between the two first oiling assemblies, and the two first oiling assemblies are respectively used to coat the two side surfaces of the lithium strip with oil liquid. Specifically, the roller surfaces of the two first oiling rollers 2100 make rolling contact with the two opposite side surfaces of the lithium strip respectively.

[0094] Furthermore, in the first oiling mechanism 2000, along the conveying direction of the lithium strip, the positions of the two first oiling rollers 2100 are arranged staggeredly. Specifically, the positions of the two first oiling rollers 2100 have a height difference. Combining with the drawings, the position of one of the first oiling rollers 2100 is higher than that of the other first oiling roller 2100. It should be noted that the height of the first oiling roller 2100 refers to the height of the rotation center line of the first oiling roller 2100.

[0095] Considering that if the two first oiling rollers 2100 are arranged at the same height, the two first oiling rollers 2100 will simultaneously squeeze the corresponding positions on the opposite sides of the lithium strip, which may damage the structure of the lithium strip and affect the conveying speed of the lithium strip. Therefore, arranging the two first oiling rollers 2100 staggeredly in height can avoid the two first oiling rollers 2100 squeezing the same position on the opposite side surfaces of the lithium strip.

[0096] Regarding the rotation of the first oiling roller 2100: In some examples, during the conveyance of the lithium strip, the first oiling roller 2100 is driven to rotate, completing the rolling contact and oiling between the first oiling roller 2100 and the lithium strip. In some examples, the first oiling assembly is provided with a motor to drive the first oiling roller 2100 to rotate, so that the first oiling roller 2100 has rotational power to avoid slipping between the first oiling roller 2100 and the lithium strip.

[0097] As an implementation manner, the first oiling assembly includes a first oil storage assembly. The first oiling roller 2100 is located above the first oil storage assembly. The first oil storage assembly has a first oil storage cavity with an opening on the upper side. It can be understood that during the rotation of the first oiling roller 2100, the roller surface of the first oiling roller 2100 adheres to the oil liquid in the first oil storage assembly.

[0098] Specifically, the first oil storage assembly includes a first oil storage plate 2201, a first mounting seat 2202, and a first oil storage side baffle 2203. The first end of the first oil storage plate 2201 is connected to the first mounting seat 2202, and the first oil storage side baffle 2203 is connected to the second end of the first oil storage plate 2201.

[0099] Combined with the attached drawings, in the first oil storage assembly, the first oil storage plate 2201 serves as the bottom plate of the first oil storage cavity, the first oil storage side baffle 2203 serves as one side plate of the first oil storage cavity, and part of the side surface of the first mounting seat 2202 serves as the other side surface of the first oil storage cavity. Further, the first oil storage side baffle is used to abut against the roller surface of the first oiling roller 2100. The first oil storage side baffle 2203 is set as a flexible structure so that the first oil storage side baffle 2203 is closely attached to the roller surface of the first oiling roller 2100 to prevent oil leakage.

[0100] Further, the first oil storage side baffle 2203 can reciprocate along the axial direction of the first oiling roller 2100 to adjust the length of the first oil storage cavity, thereby adjusting the width of the oil liquid adhered to the first oiling roller 2100 to adapt to lithium strips of different widths.

[0101] Specifically, the first oil storage assembly includes a first baffle guiding structure 2204. The first baffle guiding structure 2204 is arranged along the length direction of the first oiling roller 2100. The first oil storage side baffle 2203 is slidably connected to the first baffle guiding structure 2204 through a first slider.

[0102] In some examples, the first oil storage side baffle 2203 is moved manually. Specifically, the first oil storage assembly is provided with a screw rod having a handle, and the screw rod is driven to move in a screw drive manner. Under the push of the screw rod, the first oil storage side baffle 2203 moves. In some examples, a motor or a cylinder is used as a driver to realize the automatic movement of the first oil storage side baffle 2203. In some examples, the first oil storage assembly drives the first oil storage side baffle 2203 to move through a linear module.

[0103] As an implementation manner, the first oil storage assembly includes an auxiliary oil application roller 2300, and a sunken first oil storage area 2301 is provided on the roller surface of the auxiliary oil application roller 2300. Combining with the attached drawings, the first oil storage area 2301 is arranged along the axial direction of the auxiliary oil application roller 2300. The auxiliary oil application roller 2300 is located below the first oil application roller 2100, and the rotation center line of the auxiliary oil application roller 2300 is parallel to the rotation center line of the first oil application roller 2100. It can be understood that when the first oil application roller 2100 rotates, it can adhere to the oil liquid from the first oil storage area 2301.

[0104] Furthermore, the roller surface of the auxiliary oil application roller 2300 abuts against the first oil storage plate 2201. It can be understood that a first oil storage cavity is formed by a part of the roller surface of the auxiliary oil application roller 2300, the side of the first oil storage area 2301, and the area enclosed by the first oil storage plate 2201, the first mounting seat 2202 and the first oil storage side baffle 2203. And the roller surface of the auxiliary oil application roller 2300 abuts against the first oil storage side baffle 2203. Combining with the attached drawings, the first oil storage plate 2201 is inclined. It can be understood that the provision of the first oil storage area 2301 on the auxiliary oil application roller 2300 can increase the oil storage capacity of the first oil storage assembly, so that the roller surface of the first oil application roller 2100 contacts more oil liquid in the first oil storage cavity, and the amount of oil liquid adhered by the first oil application roller 2100 is increased.

[0105] Specifically, the first oil storage area 2301 is sunken on the roller surface of the auxiliary oil application roller 2300 to form an area with one side, and the other side of the first oil storage area 2301 is connected and transitioned with the roller surface of the auxiliary oil application roller 2300. Combining with the attached drawings, the first oil storage area 2301 is formed into an "L"-shaped area. Of course, as an alternative solution, it can also be designed that the first oil storage area 2301 is sunken on the roller surface of the auxiliary oil application roller 2300 to form an area with two opposite sides.

[0106] It can be understood that a set distance L is left between the roller surface of the first oiling roller 2100 and the side of the first oil storage area 2301. The area between the roller surface of the first oiling roller 2100 and the side of the first oil storage area 2301 forms an oil outlet gap, and the height of the oil outlet gap is L. In this case, after the roller surface of the first oiling roller 2100 adheres to the oil liquid from the first oil storage area 2301, the side of the first oil storage area 2301 can intercept part of the oil liquid on the roller surface of the first oiling roller 2100, thereby controlling the amount of oil liquid adhered to the roller surface of the first oiling roller 2100. Based on the above description, it can be known that the thickness of the oil liquid adhered to the roller surface of the first oiling roller 2100 is L.

[0107] In some examples, by replacing the first oiling roller 2100 with different diameters, the height of the oil outlet gap can be adjusted, thereby adjusting the thickness of the oil liquid adhered to the first oiling roller 2100.

[0108] As an implementation manner, the auxiliary oiling roller 2300 can be lifted and lowered to adjust the distance between the roller surface of the first oiling roller 2100 and the side of the first oil storage area 2301, that is, the height of the oil outlet gap can be adjusted, thereby realizing the amount of oil liquid adhered to the roller surface of the first oiling roller 2100. Specifically, the first oiling assembly includes a first lifting assembly. The auxiliary oiling roller 2300 is connected to the first lifting assembly, and the first lifting assembly can drive the auxiliary oiling roller 2300 to lift and lower.

[0109] Combined with the attached drawings, the first lifting assembly includes a first lifting driver, a first pushing member 2401, and a first moving member 2402. The first pushing member 2401 is connected to the first lifting driver, and the end of the auxiliary oiling roller 2300 is connected to the first moving member 2402. It can be understood that under the drive of the first lifting driver, the first pushing member 2401 can drive the first moving member 2402 to move, thereby adjusting the height of the auxiliary oiling roller 2300.

[0110] Further, the upper side of the first pushing member 2401 is provided with an inclined pushing surface, and the lower side of the first moving member 2402 is provided with an inclined pushing surface. In some examples, the first pushing member 2401 and the first moving member 2402 are respectively arranged as wedge-shaped blocks. Specifically, the first lifting driver drives the first pushing member 2401 to translate. The first pushing member 2401 and the first moving member 2402 are in contact with each other through the pushing surface, and the first pushing member 2401 can lift the first moving member 2402, so that the auxiliary oiling roller 2300 approaches the first oiling roller 2100. It can be understood that if the first lifting driver moves the first pushing member 2401 in the reverse direction, the auxiliary oiling roller 2300 and the first moving member 2402 will descend due to their own gravity.

[0111] It should be noted that, considering the precision of the equipment structure, the oil thickness on the surface of the first oiling roller 2100 and the height of the oil outlet slot are small, so the wedge-shaped first pusher 2401 and the first moving member 2402 are designed to fine-tune the height of the auxiliary oiling roller 2300. On the other hand, during the lifting and lowering process of the auxiliary oiling roller 2300, the roller surface of the auxiliary oiling roller 2300 is kept in contact with the first oil storage side baffle 2203 to prevent oil leakage from the first oil storage chamber.

[0112] In some examples, the first lifting driver drives the first pusher 2401 to translate via a screw transmission. In some examples, the first lifting driver includes a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.

[0113] It can be understood that a first lifting guide structure is provided in the first oiling assembly, and the first movable member 2402 is slidably connected to the first lifting guide structure. Specifically, the first lifting guide structure is provided as a guide rod, a guide rail or a guide groove.

[0114] As an embodiment, the auxiliary oiling roller 2300 can rotate, and the auxiliary oiling roller 2300 can also adjust the distance between the side of the first oil storage area 2301 and the roller surface of the first oiling roller 2100 by rotating. Specifically, the first oiling assembly includes a third driver, which drives the auxiliary oiling roller 2300 to rotate, and the third driver includes a motor.

[0115] In the case where the first oiling assembly is provided with the first lifting assembly, the third driver is connected to the first moving member 2402, and the rotating shaft of the third driver is connected to the auxiliary oiling roller 2300. In the case where the first oiling assembly does not have the first lifting assembly, the third driver is connected to the first mounting seat 2202, and the rotating shaft of the third driver is connected to the auxiliary oiling roller 2300.

[0116] Regarding the transmission between the third drive and the auxiliary oil coating roller 2300, as an alternative, it can also be designed that: the rotating shaft of the third drive is connected to the auxiliary oil coating roller 2300 through a belt drive or gear drive structure.

[0117] As an embodiment, the first oiling assembly includes an oil receiving groove 2501, and the first oiling roller 2100 and the auxiliary oiling roller 2300 are located above the oil receiving groove 2501. It can be understood that the oil receiving groove 2501 is used to receive dripping oil for easy recovery and avoid pollution caused by dripping oil.

[0118] Further, the first oiling assembly includes a second adjusting assembly 2502. The oil receiving tank 2501 is connected to the second adjusting assembly 2502. According to the position where the oil drops, the second adjusting assembly 2502 is used to adjust the position of the oil receiving tank 2501. In some examples, the second adjusting assembly 2502 drives the oil receiving tank 2501 to translate in a screw drive manner. Specifically, in the second adjusting assembly 2502, a motor drives a screw rod to rotate, and under the drive of the screw rod, the oil receiving tank 2501 moves.

[0119] Of course, as an alternative solution, it can also be designed that the second adjusting assembly 2502 includes a cylinder, a hydraulic cylinder or an electric cylinder.

[0120] As an implementation manner, the laminating assembly includes a second oiling assembly 3000. Before the first isolation structure enters the first channel, the second oiling assembly 3000 is used to coat the side surface of the first isolation structure with oil. Specifically, the second oiling assembly 3000 includes a second oiling roller 3100, and the second oiling roller 3100 is used to coat the side surface of the first isolation structure that contacts the lithium strip with oil, further increasing the lubrication between the first isolation structure and the lithium strip and reducing friction. It can be understood that the roller surface of the second oiling roller 3100 is in rolling contact with the first isolation structure.

[0121] Specifically, the second oiling assembly 3000 includes a second oil storage assembly 3200. The second oiling roller 3100 is located on one side of the second oil storage assembly 3200. The second oil storage assembly 3200 has a second oil storage cavity 3201, and the side surface of the second oil storage cavity 3201 is open. It can be understood that an oil inlet hole is provided on the side wall of the second oil storage assembly 3200. Further, an oil return hole is provided on the side wall of the second oil storage assembly 3200, and the oil return hole is provided at the top of the second oil storage assembly 3200. When the oil in the second oil storage assembly 3200 is full, the oil can flow out from the oil return hole for recovery.

[0122] It can be understood that during the rotation of the second oiling roller 3100, the roller surface of the second oiling roller 3100 adheres to the oil in the second oil storage assembly 3200. Combining with the attached drawings, the side surface of the second oil storage assembly 3200 is recessed to form the second oil storage cavity 3201.

[0123] Combining with the attached drawings, the second oil storage assembly 3200 includes a second oil storage side baffle 3202. The second oil storage side baffle 3202 is located at one end of the second oil storage cavity 3201, and the second oil storage side baffle 3202 abuts against the roller surface of the second oiling roller 3100. Further, the second oil storage side baffle 3202 is set as a flexible structure so that the second oil storage side baffle 3202 is closely attached to the roller surface of the second oiling roller 3100 to prevent oil leakage.

[0124] Further, the second oil storage side baffle 3202 can reciprocate along the axial direction of the second oil application roller 3100 to adjust the length of the second oil storage cavity 3201, thereby adjusting the width of the oil adhered to the second oil application roller 3100 to adapt to first isolation structures of different widths.

[0125] In some examples, the second oil storage side baffle 3202 is disposed in the second oil storage cavity 3201, and the second oil storage side baffle 3202 can move along the inner side wall of the second oil storage cavity 3201. Specifically, the second oil storage assembly 3200 includes a second slider. The second oil storage side baffle 3202 is connected to the second slider, and the second slider contacts the inner side wall of the second oil storage cavity 3201.

[0126] It can be understood that a second baffle guiding structure is provided on the inner side wall of the second oil storage cavity 3201. The second slider is slidably connected to the second baffle guiding structure, and the second baffle guiding structure is provided as a guide rail or a guide groove.

[0127] In some examples, the second oil storage side baffle 3202 is moved manually. Specifically, the second oil storage assembly 3200 is provided with a screw rod having a handle, and the screw rod is driven to move in a screw drive manner. Under the push of the screw rod, the second oil storage side baffle 3202 moves. In some examples, a motor or a cylinder is used as a driver to realize the automatic movement of the second oil storage side baffle 3202.

[0128] As an implementation manner, the second oil application assembly 3000 includes an auxiliary pressure roller 3301. Specifically, one side surface of the first isolation structure contacts the roller surface of the second oil application roller 3100, and the roller surface of the auxiliary pressure roller 3301 contacts the other side surface of the first isolation structure. The auxiliary pressure roller 3301 is used to tension and redirect the first isolation structure, thereby increasing the contact area between the first isolation structure and the roller surface of the second oil application roller 3100.

[0129] Specifically, when the auxiliary pressure roller 3301 is at a position higher than the second oil application roller 3100 or the auxiliary pressure roller 3301 is at a position lower than the second oil application roller 3100, the first isolation structure bypasses the auxiliary pressure roller 3301 and the second oil application roller 3100 respectively, and changes direction during the winding connection. Further, two auxiliary pressure rollers 3301 are provided. With reference to the accompanying drawings, the two auxiliary pressure rollers 3301 are respectively located on the upper side and the lower side of the second oil application roller 3100.

[0130] It can be understood that under the redirection and tensioning action of the two auxiliary pressure rollers 3301, the first isolation structure forms a "V" corner on the roller surface of the second oil application roller 3100, thereby increasing the contact area between the side surface of the first isolation structure and the roller surface of the second oil application roller 3100.

[0131] Further, the second oiling assembly includes a fourth driver 3302. The output end of the fourth driver 3302 is provided with a moving structure for mounting the auxiliary pressure roller 3301. Driven by the fourth driver 3302, the auxiliary pressure roller 3301 can translate to adjust the amplitude of the auxiliary pressure roller 3301 squeezing and redirecting the first isolation structure.

[0132] The present invention relates to a laminating machine, which includes two laminating assemblies. In this case, the two laminating assemblies respectively perform lithium coating on two opposite surfaces of the electrode sheet, that is, the two laminating assemblies respectively perform lithium coating on the A side and the B side of the electrode sheet. Specifically, after the A side of the electrode sheet is lithium-coated by the first laminating assembly, the electrode sheet enters the second laminating assembly. The A side of the electrode sheet is wound around the roller surface of the laminating roller 1301 in the second laminating assembly, and the B side of the electrode sheet is lithium-coated.

[0133] It can be understood that in the laminating machine, the structures of the two laminating assemblies are mirror-symmetrically arranged. Combining with the drawings, the laminating rollers 1301 in the two laminating assemblies are respectively close to the opposite ends of the two laminating assemblies.

[0134] As an implementation manner, the laminating machine includes a second winding assembly. The second winding assembly provides a second isolation structure to one of the laminating assemblies. The second isolation structure is located between the laminating roller 1301 and the electrode sheet. One side surface of the second isolation structure is wound around the roller surface of the laminating roller 1301, and the other side surface of the second isolation structure is used to contact the side surface of the electrode sheet with the lithium strip laminated.

[0135] Specifically, after the A side of the electrode sheet is lithium-coated, the second isolation structure is wound around the laminating roller 1301 in the second laminating assembly. The second isolation structure is located between the A side of the electrode sheet and the laminating roller 1301, protecting the lithium strip on the A side of the electrode sheet, preventing the lithium strip on the A side from adhering to the roller surface of the laminating roller 1301, and preventing the lithium strip and the powder on the surface of the lithium strip from falling off.

[0136] It can be understood that the second winding assembly includes a second take-up roller 4202 and a second pay-off roller 4201. Further, the second take-up roller 4202 is connected to a motor, or both the second take-up roller 4202 and the second pay-off roller 4201 are connected to a motor.

[0137] Further, the second isolation structure is set as an isolation film. Specifically, the second isolation structure is set as a PET film. Of course, as an alternative solution, the second isolation structure can also be designed as other film materials with a smooth surface and not easily adhered to the lithium strip.

[0138] As an implementation, the laminating machine includes a fourth unwinding roller for providing a protective film, which is set as a PET film. Specifically, when the third winding roller 4302 finishes winding the lithium-coated electrode sheet, the third winding roller 4302 synchronously winds the protective film, and the protective film is arranged at intervals in the electrode sheet wound into a cylinder to isolate adjacent two layers of electrode sheets and prevent the lithium strips on adjacent two layers of electrode sheets from sticking to each other.

[0139] In some examples, the fourth unwinding roller is connected to a motor to enable the fourth unwinding roller to have rotational power.

[0140] It should be noted that regarding the setting of the laminating assembly, as an alternative solution, it can also be designed that the laminating assembly in the laminating machine is set to one.

[0141] The content of the method for coating lithium on an electrode sheet in the present invention will be described in detail below in conjunction with specific embodiments. It should be noted that the following description is only an exemplary illustration and not a specific limitation of the present invention.

[0142] The present invention relates to a method for coating lithium on an electrode sheet, and the method for coating lithium on an electrode sheet is realized by a laminating machine.

[0143] Among them, the laminating machine includes a laminating assembly, and the laminating assembly includes a lithium strip conveying roller 1101, a rolling assembly, and a laminating roller 1301. The rolling assembly includes a first rolling roller 1201. As described above, a first channel for the lithium strip and the first isolation structure to pass through is formed by the gap between the first rolling roller 1201 and the lithium strip conveying roller 1101, and a second channel for the lithium strip and the electrode sheet to pass through is formed by the gap between the lithium strip conveying roller 1101 and the laminating roller 1301.

[0144] Furthermore, during the operation of the laminating assembly, there is a differential speed between the tangential speed of the roller surface of the first rolling roller 1201 and the tangential speed of the roller surface of the lithium strip conveying roller 1101. It can be understood that during the rolling process of the first rolling roller 1201, designing a differential speed between the first rolling roller 1201 and the lithium strip conveying roller 1101 is beneficial to forming a tensile deformation along the length direction of the lithium strip inside the lithium strip, enhancing the rolling effect of the first rolling roller 1201 on the lithium strip.

[0145] In some examples, the lithium strip conveying roller 1101 is connected to a motor, or the motor drives the lithium strip conveying roller 1101 to rotate through a transmission structure. It can be understood that by adjusting the motor connected to the lithium strip conveying roller 1101 or the motor connected to the rolling assembly, the differential speed between the first rolling roller 1201 and the lithium strip conveying roller 1101 can be adjusted.

[0146] As an implementation, the tangential speed of the roller surface of the lithium strip conveying roller 1101 is consistent with the conveying speed of the lithium strip. Specifically, the tangential speed of the roller surface of the lithium strip conveying roller 1101 is consistent with the tangential speed of the roller surface of the fifth unwinding roller 4501 to realize the synchronous conveying of the lithium strip.

[0147] It can be understood that by designing the conveying speed of the lithium strip to be consistent with the tangential speed of the roller surface of the lithium strip conveyor roller 1101, friction between the lithium strip and the lithium strip conveyor roller 1101 can be avoided, and the powder on the surface of the lithium strip can be prevented from adhering to the surface of the lithium strip conveyor roller 1101.

[0148] In the description of this specification, if descriptions such as the reference terms "one embodiment", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" appear, it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0149] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

[0150] In the description of the present invention, if the patent name appears with a comma ",", it means a "and" relationship, rather than an "or" relationship. For example, if the patent name is "a kind of A, B", it means that the content claimed by the present invention is: the technical solution with the theme name A and the technical solution with the theme name B.

Claims

1. A composite component, characterized in that: including a lithium strip conveyor roller (1101), one side surface of the lithium strip is wound around the roller surface of the lithium strip conveyor roller (1101); a calendering assembly, the calendering assembly includes a first calender roll (1201), the first calender roll (1201) is arranged on one side of the lithium strip conveyor roller (1101), a gap between the first calender roll (1201) and the lithium strip conveyor roller (1101) forms a first channel for the lithium strip to pass through or for the lithium strip and a first isolation structure to pass through, and the first isolation structure is used to contact the other side surface of the lithium strip and is wound around the roller surface of the first calender roll (1201); a lamination roller (1301), the lamination roller (1301) is arranged on the other side of the lithium strip conveyor roller (1101), the electrode sheet is wound around the roller surface of the lamination roller (1301), and a gap between the lamination roller (1301) and the lithium strip conveyor roller (1101) forms a second channel for the lithium strip and the electrode sheet to pass through; a first oiling mechanism (2000), the first oiling mechanism (2000) is used to oil the side surface of the lithium strip facing the lithium strip conveyor roller (1101), or the first oiling mechanism (2000) is used to oil the two opposite side surfaces of the lithium strip respectively; wherein, the first oiling mechanism (2000) includes a first oiling assembly, the first oiling assembly includes a first oiling roller (2100) and a first oil storage assembly, the roller surface of the first oiling roller (2100) adheres to the oil liquid, the first oiling roller (2100) is located above the first oil storage assembly, the first oil storage assembly has a first oil storage cavity, the upper side of the first oil storage cavity is open, during the rotation of the first oiling roller (2100), the roller surface of the first oiling roller (2100) adheres to the oil liquid in the first oil storage assembly; the first oil storage assembly includes an auxiliary oiling roller (2300), the roller surface of the auxiliary oiling roller (2300) is provided with a recessed first oil storage area (2301), the first oil storage area (2301) is arranged along the axial direction of the auxiliary oiling roller (2300), the auxiliary oiling roller (2300) is located below the first oiling roller (2100), and the first oiling roller (2100) can adhere to the oil liquid from the first oil storage area (2301) when rotating.

2. The composite component according to claim 1, wherein: The roller surface of the lithium strip conveyor roller (1101) allows the lithium strip passing through the first channel to enter the second channel after winding around.

3. The composite component according to claim 1, wherein: The lamination assembly includes a first adjustment assembly (1400), the first adjustment assembly (1400) is used to adjust the center distance between the first calender roll (1201) and the lithium strip conveyor roller (1101), the first adjustment assembly (1400) includes a second pushing member (1401) and a second driver (1402), the second driver (1402) drives the second pushing member (1401) to move, and under the action of the second pushing member (1401), the relative distance between the calendering assembly and the lithium strip conveyor roller (1101) increases.

4. The composite component according to claim 3, wherein: The first adjusting assembly (1400) includes a first abutting seat (1403). The first abutting seat (1403) is connected to the calendering assembly. The second driver (1402) drives the second pushing member (1401) to move in a first direction, so that the second pushing member (1401) pushes the first abutting seat (1403), and thus the calendering assembly moves away from the lithium tape conveying roller (1101). The first abutting seat (1403) has a first abutting surface, the first abutting surface is inclined relative to the first direction, the second pushing member (1401) has a second abutting surface, the second abutting surface is inclined relative to the first direction, and the second abutting surface abuts against the first abutting surface.

5. The composite component according to any one of claims 1 to 4, characterized in that: The laminating assembly includes a first driver (1500), and the first driver (1500) is adapted to drive the calendering assembly to move in a second direction, so that the first pressing roller (1201) presses the lithium tape on the roller surface of the lithium tape conveying roller (1101).

6. The composite component according to any one of claims 1 to 4, characterized in that: The calendering assembly includes a second pressing roller (1202), the roller surface of the second pressing roller (1202) is in rolling contact with the roller surface of the first pressing roller (1201), and the diameter of the first pressing roller (1201) is smaller than that of the lithium tape conveying roller (1101).

7. The composite component according to claim 1, wherein: The laminating assembly includes a second oiling assembly (3000), and the second oiling assembly (3000) includes a second oiling roller (3100). The second oiling roller (3100) is used to coat the side surface of the first isolation structure in contact with the lithium tape with oil.

8. The composite component according to claim 1, characterized in that: The first oil storage assembly includes a first oil storage plate (2201), a first mounting seat (2202) and a first oil storage side baffle (2203). The first end of the first oil storage plate (2201) is connected to the first mounting seat (2202), and the first oil storage side baffle (2203) is connected to the second end of the first oil storage plate (2201).

9. The composite component according to claim 8, wherein: The first oil storage side baffle (2203) is used to abut against the roller surface of the first oiling roller (2100), and the first oil storage side baffle (2203) is arranged as a flexible structure.

10. The composite component according to claim 8, characterized in that: The first oil storage side baffle (2203) can reciprocate along the axial direction of the first oiling roller (2100) to adjust the length of the first oil storage cavity.

11. The composite component according to claim 8, wherein: The roller surface of the auxiliary oiling roller (2300) abuts against the first oil storage plate (2201). A first oil storage cavity is formed by a part of the roller surface of the auxiliary oiling roller (2300), the side edge of the first oil storage area (2301), and the area enclosed by the first oil storage plate (2201), the first mounting seat (2202) and the first oil storage side baffle (2203).

12. The composite component according to claim 1, characterized in that: The first oil storage area (2301) is recessed on the roller surface of the auxiliary oiling roller (2300) to form an area with one side edge, and the other side of the first oil storage area (2301) is connected and transitioned with the roller surface of the auxiliary oiling roller (2300).

13. The composite component according to claim 1, wherein: The auxiliary oiling roller (2300) can be lifted and lowered to adjust the distance between the roller surface of the first oiling roller (2100) and the side edge of the first oil storage area (2301).

14. The composite component according to claim 13, characterized in that: The first lifting assembly includes a first lifting driver, a first pusher (2401), and a first moving member (2402). The first pusher (2401) is connected to the first lifting driver, and the end of the auxiliary oiling roller (2300) is connected to the first moving member (2402).

15. The composite component according to claim 14, wherein: The upper side of the first pusher (2401) is provided with an inclined pushing surface, and the lower side of the first moving member (2402) is provided with an inclined pushing surface. The first lifting driver drives the first pusher (2401) to translate. The first pusher (2401) and the first moving member (2402) are in abutment through the pushing surface, and the first pusher (2401) can jack up the first moving member (2402), so that the auxiliary oiling roller (2300) approaches the first oiling roller (2100).

16. The composite component according to claim 1, wherein: The auxiliary oiling roller (2300) can rotate, and the distance between the side of the first oil storage area (2301) and the roller surface of the first oiling roller (2100) can be adjusted by the rotation of the auxiliary oiling roller (2300).

17. The composite component according to claim 1, characterized in that: In the first oiling mechanism (2000), along the conveying direction of the lithium strip, the positions of the two first oiling rollers (2100) are staggered, and there is a height difference between the positions where the two first oiling rollers (2100) are located.

18. A laminating machine, characterized in that: The laminating machine includes the laminating assembly according to any one of claims 1 to 17.

19. The laminating machine according to claim 18, wherein: Two laminating assemblies are provided, and the two laminating assemblies respectively perform lithium coating on two opposite surfaces of the pole piece.

20. The laminating machine according to claim 19, wherein: The laminating machine includes a second winding assembly. The second winding assembly provides a second isolation structure to one of the laminating assemblies. One side surface of the second isolation structure is wound around the roller surface of the laminating roller (1301), and the other side surface of the second isolation structure is used to contact the side surface of the pole piece laminated with the lithium strip.

21. A method for coating lithium on a pole piece, characterized in that: The method for lithium coating the pole piece is realized by using the laminating machine according to any one of claims 18 to 20. The laminating machine includes a laminating assembly. The laminating assembly includes a lithium strip conveying roller (1101), a rolling component, and a laminating roller (1301). The rolling component includes a first rolling roller (1201). A first channel for the lithium strip and the first isolation structure to pass through is formed by the gap between the first rolling roller (1201) and the lithium strip conveying roller (1101). A second channel for the lithium strip and the pole piece to pass through is formed by the gap between the lithium strip conveying roller (1101) and the laminating roller (1301). During the operation of the laminating assembly, there is a differential speed between the tangential speed of the roller surface of the first rolling roller (1201) and the tangential speed of the roller surface of the lithium strip conveying roller (1101).

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