CN218592095U

CN218592095U - Pole piece shaping device and coating system

Info

Publication number: CN218592095U
Application number: CN202223035772.8U
Authority: CN
Inventors: 吕碧权; 陈周龙
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-10
Anticipated expiration: 2032-11-15

Abstract

The embodiment of the utility model discloses a pole piece shaping device, wherein the pole piece shaping device comprises a conveying assembly, a cutting assembly and a dust removing assembly which are sequentially arranged along a first direction X, and the first direction X is the conveying direction of the conveying assembly; the conveying assembly is used for conveying the pole pieces; the cutting assembly and the conveying assembly are oppositely arranged to trim the surface of the pole piece; the dust removal assembly comprises a dust removal opening facing the conveying assembly so as to treat waste materials generated by pole piece trimming. According to the utility model discloses, can reject the thick limit coating of pole piece to absorb the coating material who produces after rejecting the thick limit coating. A coating system is also disclosed.

Description

Pole piece shaping device and coating system

Technical Field

The utility model relates to the technical field of batteries, in particular to pole piece shaping device and coating system.

Background

In the preparation process of the pole piece, the slurry is coated on the base material to form a wet coating area, and then the wet coating area is dried by a drying box, so that the positive and negative coating materials in the coating area can be adhered on the base material after the drying is completed. When the slurry is coated, no matter the traditional transfer coater or the high-precision extrusion coater, due to the fluid characteristics of the slurry, half-moon-shaped features are easily formed at the coating start and end points and two side edges of the substrate, and the appearance of the sudden increase in thickness is called as a thick edge phenomenon. This "beading" phenomenon is undesirable in battery production and carries a significant risk of lithium extraction. Conventionally, the surface tension of the slurry is reduced or the shape of a coating gasket is optimized to avoid the occurrence of the thick edge phenomenon as much as possible, however, the surfactant required to be added for reducing the surface tension of the slurry affects the loading of the main material of the slurry, the optimization of the shape of the coating gasket is affected by factors such as coating speed and the like, and the effect of eliminating the thick edge is not ideal; in addition, if the elimination is performed after the thick edge of the pole piece is formed, the quality of the pole piece is further affected by the waste material generated in the elimination process. Therefore, how to eliminate the phenomenon of "thick edge" and avoid the waste material generated by eliminating the thin and thick edge from affecting the quality of the pole piece become the problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a pole piece shaping device and coating system can reject the thick limit coating of pole piece to absorb the coating material who produces behind the rejection thick limit coating, improve the homogeneity of pole piece coating thickness.

In order to solve the technical problem, the utility model discloses a following technical scheme:

on one hand, the pole piece reshaping device comprises a conveying assembly, a cutting assembly and a dust removing assembly which are sequentially arranged along a first direction X, wherein the first direction X is the conveying direction of the conveying assembly;

the conveying assembly is used for conveying the pole pieces;

the cutting assembly and the conveying assembly are arranged oppositely to trim the surface of the pole piece; the dust removal assembly is provided with a dust removal opening facing the conveying assembly so as to treat waste materials generated by pole piece trimming.

In addition, or alternatively, to one or more features disclosed above, the cutting assembly comprises: the cutting guide rail is arranged above the conveying assembly in a spanning mode along a second direction Y intersecting with the first direction X; the cutting piece is connected with the cutting guide rail in a sliding mode and is arranged opposite to the conveying assembly; and the transverse moving driver is in transmission connection with the cutting piece so as to drive the cutting piece to slide along the cutting guide rail.

In addition to or in lieu of one or more of the features disclosed above, the cutting rail defines a chute that is disposed along a direction of extension of the cutting rail, and the cutting member is slidably mounted to the chute.

In addition to or in the alternative to one or more of the features disclosed above, the cutting element includes a laser emitter for emitting laser light towards the transport assembly.

In addition to, or in the alternative to, one or more features disclosed above, a dusting assembly comprises: the dust removal support is arranged above the conveying assembly in a spanning mode along a second direction Y intersecting the first direction X; the dust remover is arranged on the dust removing bracket, and a dust removing port is formed in the dust remover; the dust removal air source is used for providing positive pressure air flow or negative pressure air flow for the dust remover; the dust removal port is in fluid communication with a dust removal air source.

In addition to or in the alternative to one or more of the features disclosed above, the dust remover is further provided with a chamber, the dust removing port includes a first dust removing port and a second dust removing port, the first dust removing port is opened in a wall of the chamber, the first dust removing port is in fluid communication with a dust removing air source, the second dust removing port faces the conveying assembly, and a caliber of the first dust removing port is larger than a caliber of the second dust removing port.

In addition to or in the alternative to one or more of the features disclosed above, the chamber and the second dust removal port are arranged to extend in a second direction.

In addition to or as an alternative to one or more of the features disclosed above, the pole piece shaping device further includes a thickness measuring mechanism disposed above the conveying assembly, the thickness measuring mechanism, the cutting assembly, and the dust removing assembly being sequentially arranged along the first direction X, the thickness measuring mechanism being configured to perform thickness detection on the pole piece.

In addition to or as an alternative to one or more of the features disclosed above, the pole piece shaping device further includes a controller, the controller is electrically connected to the thickness measuring mechanism, the cutting assembly and the dust removing assembly, and the controller controls the thickness measuring mechanism to start up so as to perform thickness detection on the pole piece and obtain a thickness signal of the pole piece; the controller controls the cutting assembly to work according to the thickness signal so as to trim the surface of the pole piece; the controller controls the dust removal assembly to start so as to treat waste materials generated by pole piece trimming.

On the other hand, further disclose a coating system for coating the pole piece, including unwinding mechanism, as above-mentioned any one pole piece shaping device and winding mechanism that set gradually, the pole piece is followed unwinding mechanism to the direction conveying of winding mechanism.

The pole piece shaping device in the technical scheme has the following advantages or beneficial effects: through setting up cutting assembly, dust removal subassembly, after the pole piece shaping is dry, the thick limit coating of pole piece is rejected at first to the cutting assembly, realizes that the thickness of pole piece is even, reaches the effect of pole piece micro-plastic, has solved the pole piece and has had the problem of thick limit, avoids the lithium problem of separating that pole piece thick limit phenomenon arouses, because this process carries out physical intervention after the pole piece drying and shaping, can not influence the main material loading of the coating of pole piece, and the effect is better. Meanwhile, the dust removal assembly can absorb waste materials generated by removing the thick-edge coating, the waste materials refer to coating materials of the pole pieces, the waste materials are effectively prevented from polluting a working area of the pole piece shaping device, the cleanliness of the working area is kept, and meanwhile, the phenomenon that the removed waste materials are attached to the pole pieces again to cause uneven thickness of the pole piece coating is avoided.

Drawings

The technical solution and other advantages of the present invention will be apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a cutting assembly of a pole piece shaping device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a pole piece shaping device provided in accordance with an embodiment of the present invention;

fig. 3 is a structural diagram of a cutting assembly and a dust removal assembly provided according to an embodiment of the present invention;

fig. 4 is a block diagram of a cutting rail provided in accordance with an embodiment of the present invention;

fig. 5 is a block diagram of a dust extraction assembly provided in accordance with an embodiment of the present invention;

fig. 6 is a first angle structure diagram of a dust collector provided according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an internal structure of a dust collector provided according to an embodiment of the present invention;

fig. 8 is a schematic block diagram of the controller electrically connected to the thickness measuring mechanism, the cutting assembly, and the dust removal assembly in accordance with an embodiment of the present invention;

fig. 9 is a schematic structural connection diagram of a coating system according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the description of the preferred embodiments is intended to be illustrative of the invention and is not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Generally, the pole piece comprises a substrate and an active material layer, wherein the substrate is copper foil, aluminum foil or ceramic, and slurry containing the active material is required to be coated on the surface of the pole piece to form a coating area. The coating process of the slurry is an important process in the manufacturing process of the lithium ion battery, and the performance of the battery is directly influenced by the quality of the control capability of the coating parameters.

When the slurry is coated, no matter the traditional transfer coater or the high-precision extrusion coater, due to the fluid characteristics of the slurry, half-moon-shaped features are easily formed at the coating start and end points and two side edges of the substrate, and the appearance of the sudden increase in thickness is called as a thick edge phenomenon.

The exemplary pole piece reshaping device 4 and coating system disclosed herein can remove the thick-edge coating of the pole piece 6, and achieve the effect of micro-reshaping of the edge of the pole piece 6. Meanwhile, the coating material generated after the thick-edge coating is removed can be collected.

Referring to fig. 1 and 2, there are respectively a schematic structural diagram 41 of the cutting assembly of the pole piece shaping device 4 of the present embodiment and a schematic structural diagram of the pole piece shaping device 4, wherein the pole piece 6 is conveyed in a direction indicated by an arrow in the figure; the direction indicated by the arrow is the direction indicated by the X axis. The present embodiment is a pole piece shaping device 4, configured to shape a pole piece 6, where the pole piece shaping device 4 includes a conveying assembly 43, and a cutting assembly 41 and a dust removing assembly 42 sequentially arranged along a first direction X, where the first direction X is a conveying direction of the conveying assembly 43, that is, a moving direction of the pole piece 6, and it should be noted that the first direction X may be an overall traveling direction of the pole piece 6, which may be a linear direction or a moving extending direction with a certain bend. The cutting assembly 41 and the dust removing assembly 42 are disposed on the same side of the conveying assembly 43, and the cutting assembly 41 and the dust removing assembly 42 are sequentially arranged along the first direction X. For example, referring to fig. 2, the cutting assembly 41 and the dusting assembly 42 may be disposed above the conveyor assembly 43. Wherein, when the cutting assembly 41 and the dust removing assembly 42 are arranged on the same side of the conveying assembly 43 and are positioned at the starting end or the ending end of the conveying assembly 43, the pole piece reshaping device 4 of the embodiment can also process the thick edge coating positioned at the starting end or the ending end of the pole piece 6.

The transport assembly 43 is used to transport the pole pieces 6. The conveying assembly 43 includes a frame 431, a conveying roller 432 rotatably disposed on the frame 431, and a driving source movably connected to the conveying roller 432 and configured to drive the conveying roller 432 to rotate. The driving source is started to drive the conveying roller 432 to rotate, and the conveying roller 432 drives the pole piece 6 carried by the conveying roller 432 to move; the pole piece 6 moves along the first direction X of the transport assembly 43. In the present embodiment, the cutting assembly 41 and the dust removing assembly 42 are both mounted on the frame 431. Wherein the cutting assembly 41 is disposed opposite the conveying assembly 43 to modify the surface of the pole piece 6, and in a specific embodiment, the cutting assembly 41 is disposed opposite the side edge of the pole piece 6 on the conveying assembly 43 to eliminate the "thick edge" of the side edge of the pole piece 6. The dust extraction assembly 42 is provided with a dust extraction opening 423 facing the transport assembly to dispose of the waste material produced by trimming the pole pieces 6.

Compare with traditional mode of solving the thick limit problem, this embodiment is through setting up cutting assembly 41, dust removal component 42, and after the shaping of pole piece 6 is dry, the thick limit coating of pole piece 6 is rejected at first to cutting assembly 41 for the thickness of pole piece 6 is even, reaches the effect of the little plastic of pole piece 6, has solved pole piece 6 and has had the problem of thick limit. Meanwhile, the dust removal assembly 42 can absorb waste materials generated by removing thick-edge coatings, the waste materials refer to coating materials removed from the pole piece 6 by the cutting assembly 41, the waste materials are effectively prevented from polluting a working area of the pole piece shaping device 4, the cleanliness of the working area is kept, and the problem that the thickness of the pole piece 6 is uneven due to the fact that the waste materials are adhered to the pole piece 6 again is solved.

The pole piece shaping device 4 of the present embodiment can process one pole piece 6, wherein the number of the cutting assemblies 41 is not limited. Referring to fig. 3 and 4, the structure diagrams of the cutting unit 41 and the dust removing unit 42 and the structure diagram of the cutting guide 411 in the present embodiment are shown. The pole piece shaping device 4 of the embodiment can process a plurality of pole pieces 6 at the same time, and the utilization rate of equipment is improved. Wherein, a pole piece 6 is correspondingly cooperated with the two cutting assemblies 41 to further accelerate the processing speed of the pole piece 6.

Referring to fig. 3 and 4, the structure diagrams of the cutting unit 41 and the dust removing unit 42 and the structure diagram of the cutting guide 411 in the present embodiment are shown. In this embodiment, the cutting assembly 41 of the pole piece shaping device 4 includes: a cutting guide rail 411 arranged above the conveying assembly 43 along the second direction Y; the second direction Y intersects the first direction X, and in this embodiment, the second direction Y is perpendicular to a projection of the first direction X on a horizontal plane. In this embodiment, the cutting guide 411 is a long strip structure, the length direction of the cutting guide 411 extends along the second direction Y, and the length of the cutting guide 411 is greater than the width of the pole piece 6, so that the cutting member 412 can slide along the cutting guide 411 with a sufficient sliding space, so that the cutting member 412 can remove the thick-edge coating. Wherein the second direction is the Y-axis axial direction.

The cutting member 412 is slidably connected to the cutting guide 411, and the cutting member 412 is disposed opposite to the conveying assembly 43, it can be understood that when the device is in operation, the pole piece 6 is conveyed on the conveying assembly 43, and therefore the cutting member 412 is also disposed opposite to the pole piece 6. Referring to fig. 3, a cutting assembly 41 and a dust removing assembly 42 of the present embodiment are shown. In this embodiment, the cutting member 412 comprises a laser emitter for emitting laser towards the conveying assembly 43, and more specifically, the laser emitter emits laser towards the pole piece 6, the laser removes the coating material on the thick edge of the pole piece 6, and the removed coating material is emitted in the form of fine particles or gas. In other embodiments, the cutting member 412 may employ other devices that emit a laser beam.

The cutting assembly 41 further comprises a traverse actuator 413, the traverse actuator 413 being drivingly connected to the cutting member 412 for driving the cutting member 412 to slide along the cutting rail 411. In the present embodiment, the traverse actuator 413 employs a drive motor. It will be appreciated that the cutting assembly 41 further comprises a transmission structure (not shown), through which the traverse actuator 413 is drivingly connected to the cutting member 412 for driving the cutting member 412 to slide along the cutting rail 411. The transmission structure comprises a screw and a nut seat, the screw is arranged along the extending direction of the cutting guide rail 411, and the screw is rotationally arranged on the cutting guide rail 411. The output end of the traverse actuator 413 is connected with the screw rod into a whole in a matching way through a coupler, the traverse actuator 413 drives and controls the rotation speed of the screw rod, and the screw rod feeds speed information back to the traverse actuator 413. The screw is provided with a nut seat, the nut seat is fixed with the cutting piece 412, and the screw drives the cutting piece 412 to slide on the cutting guide rail 411. It should be noted that the specific structure of the transmission structure is only given as an example, and the structure that enables the traverse actuator 413 to drive the cutting member 412 to slide on the cutting rail 411 is within the protection scope of the present application.

In other embodiments, the cutting element may also be a linear motor module or other driving mechanism.

Referring to fig. 4, a structure of the cutting rail 411 of the present embodiment is shown. In this embodiment, the cutting guide rail 411 of the pole piece shaping device 4 is provided with a sliding groove 4111, the sliding groove 4111 is arranged along the extending direction of the cutting guide rail 411, and the cutting member 412 is slidably mounted on the sliding groove 4111. In this embodiment, the traverse driver 413 is activated to drive the cutting member 412 to slide in the chute 4111. The cutting guide rail 411 is arranged along the second direction Y, the chute 4111 is arranged along the extending direction of the cutting guide rail 411, namely the chute 4111 is also arranged on the second direction Y, so that the cutting piece 412 can slide relative to the chute 4111 to adjust the position so as to align to a thick edge on the pole piece 6, and then the thick edge is removed. It should be noted that the arrangement of the cutting guide 411 along the second direction Y is only given by way of example, and the specific positions of the cutting element 412 and the conveying assembly 43 are not limited as long as the cutting guide 411 is located across the pole piece 6 which is dried completely or the pole piece 6 which is not dried completely.

Referring to fig. 5 and 6, a structural diagram of the dust removing assembly 42 and a first angle structural diagram of the dust remover 422 of the present embodiment are shown, respectively. In this embodiment, the dust removing assembly 42 of the pole piece shaping device 4 includes: the dust removing bracket 421 straddles the conveying assembly 43 along the second direction Y; and a dust collector 422 attached to the dust collecting holder 421, and a dust collecting port 423 opened in the dust collector 422. The dedusting assembly 42 further includes a dedusting air supply (not shown) for providing a positive or negative pressure air flow to the deduster 422; a source of de-dusting gas is in fluid communication with the de-dusting port 423.

The dust removing support 421 includes two dust removing sub-frames 4211, two ends of the dust remover 422 are respectively fixedly connected with the two dust removing sub-frames 4211, and one end of each of the two dust removing sub-frames 4211 far away from the dust remover 422 is fixedly connected with the frame 431. The dust removal sub-frame 4211 mainly supports the dust remover 422. Further, along the second direction Y, the center line of the dust remover 422 is coaxial with the center lines of the two dust removing sub-frames 4211, so as to further ensure the stability of the dust remover 422.

When the dust removal air source adopts a negative pressure device, wherein negative pressure is a gas pressure state lower than normal pressure (namely, one atmospheric pressure is often said), the negative pressure recovery device refers to a device with an accommodating space, and negative pressure gas flow is stored in the accommodating space. After the dust removing opening 423 is communicated with the fluid through the dust removing air source, the air pressure in the negative pressure device is lower than the air pressure of the external environment, and the external air flow flows into the negative pressure device through the dust removing opening 423 to be discharged. Specifically, when the external air flow flows into the dust removing port 423, the rejected waste materials of the pole piece 6 are brought into the dust removing port 423 to be removed, so that the phenomenon that the coating material falls on the pole piece shaping device 4 and the conveying assembly 43 to affect the work of the pole piece shaping device or the conveying assembly 43 or falls on other areas of the pole piece 6 again to cause pollution or uneven thickness is avoided.

Referring to fig. 7, an internal structure of the dust remover 422 of the present embodiment is schematically illustrated. In this embodiment, a chamber 423c is further disposed on the dust collector 422 of the pole piece shaping device 4, the dust removing port 423 includes a first dust removing port 423a and a second dust removing port 423b which are opened on the wall of the chamber 423c and are both communicated with the chamber 423c, the first dust removing port 423a is in fluid communication with the dust removing air source, and the second dust removing port 423b faces the conveying assembly 43 (i.e., the second dust removing port 423b faces the pole piece 6). The chamber 423c and the second dust removal port 423b of the pole piece shaping device 4 extend in the second direction Y. In the second direction Y, the length of the chamber 423c and the second dust removing port 423b of the present embodiment is slightly smaller than the length of the dust remover 422, that is, the length of the dust removing port 423b and the chamber 423c is as large as possible, and the inflow amount and the outflow amount of the positive pressure air flow or the negative pressure air flow are increased to further increase the processing speed of the coating material.

Wherein, the aperture of the first dust removal opening 423a is larger than the aperture of the second dust removal opening 423 b. The air intake of the second dust removal opening 423b is larger, so that the sucked air flow can be discharged quickly and completely, the collection intensity and the collection speed of the coating material collected by the second dust removal opening 423b are increased, and the treatment speed of the coating material is further increased.

When the dust removal air source adopts a negative pressure device, after the negative pressure device is opened, the removed coating material can quickly enter the chamber 423c through the second dust removal port 423b and then enter an external waste recovery device connected with the first dust removal port 423a through the first dust removal port 423 a.

Referring to fig. 9, a schematic view of a connection structure of a coating system of this embodiment is shown. The pole piece shaping device 4 further comprises a thickness measuring mechanism 2 arranged above the conveying assembly 43, the thickness measuring mechanism 2, the cutting assembly 41 and the dust removing assembly 42 are sequentially arranged along the first direction X (namely the conveying direction of the pole piece 6), and the thickness measuring mechanism 2 is used for detecting the thickness of the pole piece 6.

Referring to fig. 8, the pole piece shaping device 4 further includes a controller, the controller is electrically connected to the thickness measuring mechanism 2, the cutting assembly 41 and the dust removing assembly 42, the controller controls the thickness measuring mechanism 2 to start up so as to perform thickness detection on the pole piece 6 and obtain a thickness signal of the pole piece 6, where the thickness signal includes a corresponding position coordinate and a corresponding thickness value of the pole piece 6; the controller controls the cutting assembly 41 to work according to the thickness signal, and the cutting assembly 41 moves to the corresponding position coordinate to trim the surface of the pole piece 6; and the controller controls the dust removal assembly 42 to be activated to dispose of waste material resulting from trimming the surface of the pole piece 6. In the present embodiment, the thickness measuring mechanism 2 may employ a thickness detection sensor. In other embodiments, the detection mechanism can detect whether the thick edge exists on the surface of the pole piece 6. It should be noted that the cutting assembly 41 and the dust removing assembly 42 will naturally feed back their operating states to the controller.

Through the setting, firstly, according to the coating size of the pole piece 6, the controller controls the laser emitter to adjust the position, so that the laser point/laser beam/laser of the laser emitter is irradiated on the boundary position or the vicinity of the boundary position of the pole piece 6 and the coating area on the pole piece 6.

The controller controls the thickness measuring mechanism 2 to start, and when the thickness measuring mechanism 2 detects the specific position of the thick edge coating, the controller converts the elimination power of the laser spot/laser spot beam/laser according to the thickness of the thick edge coating and the coating speed of the pole piece 6. The working area of the laser emitter is calculated according to the position of the thick edge coating, the controller sends an instruction to the transverse moving driver 413 and the cutting piece 412 for execution, so that the laser point/laser beam/laser moves to the thick edge position according to a certain distance and speed and the thick edge coating is removed, and the effect of micro-shaping the edge of the pole piece 6 is achieved.

The controller controls the dust removal air source to start, coating materials generated by removing the thick-edge coating enter the chamber 423c through the second dust removal port 423b, and then enter the external waste recovery device connected with the first dust removal port 423a through the first dust removal port 423 a. The pole piece shaping device 4 of this example can reject the thick edge coating of pole piece 6, reaches the effect of 6 marginal micro-plastic of pole piece. Meanwhile, coating materials generated after the thick edge coating is removed can be collected.

Referring to fig. 9, the embodiment provides a coating system for coating a pole piece 6, including an unwinding mechanism 1, a pole piece shaping device 4 and a winding mechanism 5, which are sequentially arranged, where the pole piece 6 is conveyed along a direction from the unwinding mechanism 1 to the winding mechanism 5.

In the working process of the embodiment, the thick edge phenomenon occurs when the first pole piece 6 is coated, and the solution is that the pole piece 6 is unreeled by the unreeling mechanism 1 and then is processed by the pole piece shaping device 4, and finally is reeled by the reeling mechanism 5. The coating system of the embodiment can remove the thick edge coating of the pole piece 6, and achieves the effect of micro-shaping the edge of the pole piece 6. Meanwhile, the coating material generated after the thick-edge coating is removed can be collected.

In this embodiment, a splitting mechanism 3 is further included. The slitting mechanism 3 is used for slitting the pole pieces 6. And after the pole piece 6 is cut, the pole piece shaping device 4 carries out shaping treatment again.

The pole piece shaping device 4 has been described in detail in the previous embodiments, and is not described herein again.

The above steps are provided only to help understand the method, structure and core idea of the present invention. For those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A pole piece shaping device (4) comprising a conveying assembly (43) and a cutting assembly (41) and a dust removal assembly (42) arranged in sequence along a first direction (X), the first direction (X) being the conveying direction of the conveying assembly (43);

the conveying assembly (43) is used for conveying the pole piece (6);

wherein the cutting assembly (41) is arranged opposite to the conveying assembly (43) to modify the surface of the pole piece (6); the dust removal assembly (42) is provided with a dust removal opening (423) facing the conveying assembly (43) for processing waste generated by trimming the pole piece (6).

2. The pole piece reshaping device (4) according to claim 1, wherein the cutting assembly (41) comprises: a cutting guide rail (411) extending across above the conveyor assembly (43) in a second direction (Y) intersecting the first direction (X); a cutting member (412) slidably connected to the cutting rail (411), the cutting member (412) being disposed opposite to the conveying assembly (43); and a traverse motion driver (413) in transmission connection with the cutting member (412) to drive the cutting member (412) to slide along the cutting guide rail (411).

3. The pole piece reshaping device (4) according to claim 2, wherein the cutting guide rail (411) is provided with a sliding groove (4111), the sliding groove (4111) is arranged along the extending direction of the cutting guide rail (411), and the cutting member (412) is slidably mounted on the sliding groove (4111).

4. The pole piece shaping device (4) according to claim 2, wherein the cutting member (412) comprises a laser emitter for emitting laser light towards the pole piece (6) on the transport assembly (43).

5. The pole piece shaping device (4) according to claim 1, wherein the dust extraction assembly (42) comprises: a dust removal support (421) straddling the conveyor assembly (43) along a second direction (Y) intersecting the first direction (X); the dust remover (422) is mounted on the dust removing support (421), and the dust removing opening (423) is formed in the dust remover (422); and a dust removal air source for providing a positive or negative pressure air flow to the dust remover (422); the dust extraction port (423) is in fluid communication with the dust extraction gas source.

6. The pole piece reshaping device (4) according to claim 5, wherein a chamber (423 c) is further provided on the dust collector (422), the dust removing port (423) comprises a first dust removing port (423 a) and a second dust removing port (423 b) which are opened on the wall of the chamber (423 c), the first dust removing port (423 a) is in fluid communication with the dust removing air source, the second dust removing port (423 b) faces the conveying assembly (43), and the aperture of the first dust removing port (423 a) is larger than that of the second dust removing port (423 b).

7. The pole piece reshaping device (4) according to claim 6, wherein the chamber (423 c) and the second dust extraction opening (423 b) extend in a second direction (Y).

8. The pole piece reshaping device (4) according to claim 1, wherein the pole piece reshaping device (4) further comprises a thickness measuring mechanism (2) disposed above the conveying assembly (43), the thickness measuring mechanism (2), the cutting assembly (41) and the dust removing assembly (42) are sequentially arranged along the first direction (X), and the thickness measuring mechanism (2) is used for thickness detection of the pole piece (6).

9. The pole piece reshaping device (4) according to claim 8, wherein the pole piece reshaping device (4) further comprises a controller, the controller is electrically connected with the thickness measuring mechanism (2), the cutting assembly (41) and the dust removing assembly (42), and the controller controls the thickness measuring mechanism (2) to be started so as to detect the thickness of the pole piece (6) and acquire a thickness signal of the pole piece (6); the controller controls the cutting assembly (41) to work according to the thickness signal so as to trim the surface of the pole piece (6); the controller controls the dust removal assembly (42) to be started so as to treat waste generated by trimming the pole piece (6).

10. A coating system for coating a pole piece (6), comprising an unwinding mechanism (1), a pole piece reshaping device (4) according to any one of claims 1 to 9 and a winding mechanism (5) arranged in sequence, wherein the pole piece (6) is conveyed along the direction from the unwinding mechanism (1) to the winding mechanism (5).