Embossing device and winding equipment

Abstract

The utility model provides an embossing device and winding equipment, and relates to the technical field of battery production. The embossing device comprises an embossing roller capable of rotating around the axis, a rubber roller capable of rotating around the axis and a dust removal assembly. A plurality of knurling parts are arranged on the roller surface of the knurling roller, a rubber layer is arranged on the roller surface of the rubber roller, the rubber roller is located below the knurling roller, the knurling roller and the rubber roller jointly define a limiting space through which a pole piece penetrates, at least part of the knurling parts are located in the limiting space, and at least part of the rubber layer is located in the limiting space. The dust removal assembly defines a dust removal channel and is provided with a dust removal opening communicated with the dust removal channel, at least part of the rubber roller is contained in the dust removal channel through the dust removal opening, and the dust removal assembly is used for generating suction airflow in the dust removal channel. According to the knurling device provided by the invention, the dust on the rubber roller and the pole piece is subjected to negative pressure adsorption through the dust collection assembly, so that the production yield of batteries is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly to an embossing device and a winding equipment. Background Art

[0002] The information disclosed in this background art section is only for enhancing the understanding of the overall background art of the present disclosure, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art.

[0003] During the production process of a battery, a winding equipment is usually used to wind a positive electrode sheet, a negative electrode sheet and a separator together to form an electrode core. Before performing the above winding operation, the electrode sheet is generally roll-pressed by an embossing device so that uniformly distributed indentations are left on the electrode sheet, thereby improving the problem of poor alignment of the tabs of the electrode core due to uneven thickness of the electrode sheet.

[0004] In the existing embossing device, the electrode sheet is roll-pressed by the cooperation of an embossing roller and a rubber roller. Since dust is easily adhered to the rubber roller, when the electrode sheet passes between the embossing roller and the rubber roller, the dust on the rubber roller is easily attached to the electrode sheet, thereby affecting the production yield of the battery. Summary of the Utility Model

[0005] In view of this, the purpose of the present application is to provide an embossing device and a winding equipment, aiming to solve the technical problems in the related art.

[0006] To achieve the above purpose, the technical solution adopted in the present application is as follows:

[0007] In a first aspect, an embodiment of the present application provides an embossing device, including:

[0008] An embossing roller capable of rotating around its axis, and a plurality of embossing portions are provided on the roller surface of the embossing roller;

[0009] A rubber roller capable of rotating around its axis, and a rubber layer is provided on the roller surface of the rubber roller. The rubber roller is located below the embossing roller. The embossing roller and the rubber roller jointly define a limiting space for passing through the electrode sheet. At least part of the plurality of embossing portions is located in the limiting space, and at least part of the rubber layer is located in the limiting space;

[0010] A dust removal assembly defining a dust removal channel and having a dust removal port communicating with the dust removal channel. At least part of the rubber roller is received in the dust removal channel through the dust removal port. The dust removal assembly is used to generate a suction air flow in the dust removal channel.

[0011] In one embodiment of the first aspect, the dust removal assembly includes a dust removal cover, a dust removal pipe, and a suction member. The dust removal cover is sleeved on the rubber roller and is provided with the dust removal opening. The dust removal pipe is connected between the dust removal cover and the suction member. The dust removal pipe and the dust removal cover jointly define the dust removal channel.

[0012] In one embodiment of the first aspect, the dust removal pipe includes a first pipe body and a second pipe body. The first pipe body is bent and connected between the second pipe body and the dust removal cover. The first pipe body, the second pipe body, and the dust removal cover jointly define the dust removal channel. The suction member is connected to one end of the second pipe body away from the first pipe body.

[0013] In one embodiment of the first aspect, the embossing device further includes a fixed bracket and two connecting members. The two connecting members are spaced apart on the fixed bracket. The rubber roller is rotatably connected to the two connecting members respectively; in the axial direction of the rubber roller, connection portions are respectively provided at both ends of the dust removal assembly, and each connection portion is connected to one of the connecting members.

[0014] In one embodiment of the first aspect, a through hole is provided in the fixed bracket. The through hole is used for passing through the pole piece and communicating with the limiting space.

[0015] In one embodiment of the first aspect, the rubber roller is rotatably connected to the two connecting members respectively through a rotating shaft; in the axial direction of the rubber roller, avoiding grooves are respectively provided at both ends of the dust removal assembly. Each avoiding groove communicates with the dust removal opening and the dust removal channel respectively, and each avoiding groove is used for avoiding the rotating shaft.

[0016] In one embodiment of the first aspect, the embossing device further includes a first driving member. The first driving member is connected to one end of the rotating shaft and is used for driving the rotating shaft to rotate relative to the two connecting members, so as to drive the rubber roller to rotate around its axis.

[0017] In one embodiment of the first aspect, the embossing device further includes a second driving member and a transmission member. The transmission member is slidably arranged on the fixed bracket. The embossing roller is rotatably connected to one side of the transmission member. The second driving member is arranged on the fixed bracket and is connected to the side of the transmission member away from the embossing roller, and is used for driving the transmission member to slide relative to the fixed bracket, so as to drive the embossing roller to move in a direction close to or away from the rubber roller.

[0018] In one embodiment of the first aspect, a sliding member is provided on the transmission member, a guiding member is provided on the fixed bracket, the sliding member is slidably connected to the guiding member, a first limiting member and a second limiting member are provided on the fixed bracket, the first limiting member is located at one end of the guiding member away from the rubber roller, and the second limiting member is located at one end of the guiding member close to the rubber roller.

[0019] In a second aspect, an embodiment of the present application further provides a winding device, including the embossing device in any of the above embodiments.

[0020] The beneficial effects of the present application are as follows:

[0021] The embossing device provided by the present application includes an embossing roller and a rubber roller. The embossing roller can rotate around its axis and has a plurality of embossing parts. The rubber roller can rotate around its axis and has a rubber layer. The embossing roller and the rubber roller jointly define a limiting space for passing through the pole piece. At least some of the plurality of embossing parts are located in the limiting space, and at least a part of the rubber layer is located in the limiting space. In this way, when the pole piece passes through the limiting space, the embossing part and the rubber layer squeeze each other to form evenly distributed indentations on the pole piece. On this basis, since the embossing device further includes a dust removal assembly, the rubber roller is located below the embossing roller, the dust removal assembly defines a dust removal channel and is provided with a dust removal port communicating with the dust removal channel. At least a part of the rubber roller is received in the dust removal channel through the dust removal port, and the dust removal assembly is used to generate a suction air flow in the dust removal channel, so as to realize negative pressure adsorption of the dust on the rubber roller and the pole piece, thereby improving the production yield of the battery.

[0022] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 Shows a perspective structural view of the embossing device in some embodiments of the present application;

[0025] Figure 2 Shows another perspective structural view of the embossing device in some embodiments of the present application;

[0026] Figure 3 Shows still another perspective structural view of the embossing device in some embodiments of the present application;

[0027] Figure 4 The exploded structural schematic diagram of the embossing device in some embodiments of the present application is shown.

[0028] Description of main component symbols:

[0029] 100 - embossing device; 110 - embossing roller; 111 - embossing part; 120 - rubber roller; 121 - limiting space; 122 - rotating shaft; 130 - dust removal assembly; 131 - dust removal cover; 1311 - dust removal channel; 1312 - dust removal port; 1313 - connecting part; 1314 - avoidance groove; 132 - dust removal pipe; 1321 - first pipe body; 1322 - second pipe body; 140 - fixing bracket; 141 - through hole; 142 - guiding part; 143 - first limiting part; 144 - second limiting part; 150 - connecting piece; 160 - first driving part; 170 - second driving part; 180 - transmission part; 181 - sliding part; 182 - opening; 190 - air pressure regulating part. Detailed implementation manners

[0030] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying 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 accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0033] In this application, unless otherwise clearly specified or limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] During the production process of a battery, a winding device is usually used to wind the positive electrode sheet, negative electrode sheet and separator together to form an electric core. Before the above winding action, the electrode sheet is generally roll-pressed by an embossing device so that evenly distributed indentations are left on the electrode sheet, thereby improving the problem of poor alignment of the electrode tabs of the electric core due to uneven thickness of the electrode sheet. In the existing embossing device, the electrode sheet is roll-pressed by the cooperation of an embossing roller and a rubber roller. Since the rubber roller has a rubber layer on its roller surface, the roller surface of the rubber roller is rougher and has a lower hardness than that of the embossing roller. Therefore, dust is easily adhered to the rubber roller. When the electrode sheet passes between the embossing roller and the rubber roller, the dust on the rubber roller is easily attached to the electrode sheet, thereby affecting the production yield of the battery.

[0036] To solve the above technical problems, in a first aspect, an embodiment of the present application provides an embossing device, which relates to the technical field of battery production and is mainly applied to a winding device for roll-pressing an electrode sheet to be embossed so that evenly distributed indentations are formed on the surface of the electrode sheet.

[0037] As Figure 1 、 Figure 2 and Figure 4 shown, the embossing device 100 provided in this embodiment includes: an embossing roller 110, a rubber roller 120 and a dust removal assembly 130.

[0038] Among them, the embossing roller 110 can rotate around its axis, and there are a plurality of embossing parts 111 on the roller surface of the embossing roller 110. The rubber roller 120 can rotate around its axis, and there is a rubber layer on the roller surface of the rubber roller 120. The rubber roller 120 is located below the embossing roller 110. The embossing roller 110 and the rubber roller 120 jointly define a limiting space 121 for threading the pole piece. At least some of the plurality of embossing parts 111 are located in the limiting space 121, and at least a part of the rubber layer is located in the limiting space 121. The dust removal assembly 130 defines a dust removal channel 1311 and is provided with a dust removal port 1312 communicated with the dust removal channel 1311. At least a part of the rubber roller 120 is accommodated in the dust removal channel 1311 through the dust removal port 1312. The dust removal assembly 130 is used to generate a suction air flow in the dust removal channel 1311.

[0039] It should be noted that the above "the embossing roller 110 can rotate around its axis" means that the embossing roller 110 can rotate around its own axis. The above "the rubber roller 120 can rotate around its axis" means that the rubber roller 120 can rotate around its own axis. The above rubber layer can be a polyurethane layer with a thickness of 3 mm and a Shore hardness of A70. Of course, the rubber layer can also be a silicone layer, a rubber layer, etc. The specific type, thickness and hardness of the rubber layer are not specifically limited here.

[0040] It can be understood that the embossing device 100 provided in this embodiment includes an embossing roller 110 and a rubber roller 120. The embossing roller 110 can rotate around its axis and has a plurality of embossing parts 111. The rubber roller 120 can rotate around its axis and has a rubber layer. The embossing roller 110 and the rubber roller 120 jointly define a limiting space 121 for threading the pole piece. At least some of the plurality of embossing parts 111 are located in the limiting space 121, and at least a part of the rubber layer is located in the limiting space 121. In this way, when the pole piece passes through the limiting space 121, the embossing part 111 and the rubber layer are mutually extruded to form uniformly distributed indentations on the pole piece. On this basis, since the embossing device 100 further includes a dust removal assembly 130, the rubber roller 120 is located below the embossing roller 110. The dust removal assembly 130 defines a dust removal channel 1311 and is provided with a dust removal port 1312 communicated with the dust removal channel 1311. At least a part of the rubber roller 120 is accommodated in the dust removal channel 1311 through the dust removal port 1312. The dust removal assembly 130 is used to generate a suction air flow in the dust removal channel 1311, so that negative pressure adsorption of the dust on the rubber roller 120 and the pole piece is realized, thereby improving the production yield of the battery.

[0041] It should be noted that since the rubber roller 120 is more likely to adhere to dust than the embossing roller 110, that is, both the embossing roller 110 and the rubber roller 120 will adhere to dust, but the phenomenon of dust adhesion on the rubber roller 120 is more serious than that on the embossing roller 110. Therefore, the rubber roller 120 is arranged below the embossing roller 110, and then a dust removal assembly 130 is provided at the position of the rubber roller 120. Such a dust removal method has a greater focus and can mainly adsorb the dust on the rubber roller 120 and the electrode sheet by negative pressure. On this basis, the dust on the embossing roller 110 falling under the action of gravity will also be adsorbed by the dust removal assembly 130, thereby achieving a better dust removal effect.

[0042] As Figure 1 , Figure 2 and Figure 4 shown, in one embodiment, the dust removal assembly 130 includes a dust removal cover 131, a dust removal pipe 132 and a suction member. The dust removal cover 131 is sleeved on the rubber roller 120 and is provided with a dust removal port 1312. The dust removal pipe 132 is connected between the dust removal cover 131 and the suction member, and the dust removal pipe 132 and the dust removal cover 131 jointly define a dust removal channel 1311.

[0043] In this embodiment, since the dust removal assembly 130 includes a dust removal cover 131, a dust removal pipe 132 and a suction member, the dust removal cover 131 is sleeved on the rubber roller 120 and is provided with a dust removal port 1312. The dust removal pipe 132 is connected between the dust removal cover 131 and the suction member, and the dust removal pipe 132 and the dust removal cover 131 jointly define a dust removal channel 1311. In this way, when the electrode sheet passes through the limiting space 121 between the embossing roller 110 and the rubber roller 120, the suction member can generate a suction airflow, so as to adsorb the dust adhered to the electrode sheet and the rubber roller 120 through the dust removal channel 1311 by negative pressure. At the same time, since the dust removal cover 131 is sleeved on the rubber roller 120, it can shield the roller surface of the rubber roller 120 and reduce the possibility of dust emission.

[0044] Exemplarily, the suction member can be a device capable of generating a suction airflow such as a suction fan or an exhaust fan, and no specific limitation is made here.

[0045] As Figure 2 shown, further, the dust removal pipe 132 includes a first pipe body 1321 and a second pipe body 1322. The first pipe body 1321 is bent and connected between the second pipe body 1322 and the dust removal cover 131. The first pipe body 1321, the second pipe body 1322 and the dust removal cover 131 jointly define a dust removal channel 1311. The suction member is connected to one end of the second pipe body 1322 away from the first pipe body 1321.

[0046] In this embodiment, the provision of the second pipe body 1322 facilitates the connection of the dust removal pipe 132 to the suction member. By bending the first pipe body 1321 to connect between the second pipe body 1322 and the dust removal cover 131, the occupation of the longitudinal space by the dust removal pipe 132 can be reduced, making the structure of the embossing device 100 more compact.

[0047] In another embodiment, the dust removal assembly 130 includes a suction member and a collection container. The collection container is provided with a dust removal channel 1311 and a dust removal port 1312. The suction member is directly connected to one end of the collection container away from the dust removal port 1312. In this way, negative pressure adsorption of dust can also be achieved, and the structure of the dust removal assembly 130 is not specifically limited herein.

[0048] As Figure 4 shown, in one embodiment, the embossing device 100 further includes a fixed bracket 140 and two connecting members 150. The two connecting members 150 are spaced apart on the fixed bracket 140, and the rubber roller 120 is rotatably connected to the two connecting members 150 respectively; in the axial direction of the rubber roller 120, connecting portions 1313 are provided at both ends of the dust removal assembly 130, and each connecting portion 1313 is connected to one connecting member 150.

[0049] In this embodiment, by spacing two connecting members 150 on the fixed bracket 140, it is not only convenient for the rotational installation of the rubber roller 120, but also convenient for the installation of the dust removal assembly 130. At the same time, since both the rubber roller 120 and the dust removal assembly 130 are connected to the connecting member 150, the use of connecting parts is saved, and the manufacturing cost of the embossing device 100 is reduced.

[0050] As Figure 1 and Figure 3 shown, further, through holes 141 are formed in the fixed bracket 140. The through holes 141 are used for passing through the pole pieces and communicating with the limiting space 121.

[0051] In this embodiment, since through holes 141 are formed in the fixed bracket 140 and the through holes 141 communicate with the limiting space 121, it is convenient for the pole pieces to be respectively passed through the positions of the through holes 141 and the limiting space 121, facilitating subsequent rolling of the pole pieces by the embossing roller 110 and the rubber roller 120 to form indentations.

[0052] As Figure 2 and Figure 4 shown, further, the rubber roller 120 is rotatably connected to the two connecting members 150 respectively through a rotating shaft 122; in the axial direction of the rubber roller 120, avoiding grooves 1314 are formed at both ends of the dust removal assembly 130, and each avoiding groove 1314 communicates with the dust removal port 1312 and the dust removal channel 1311 respectively, and each avoiding groove 1314 is used for avoiding the rotating shaft 122.

[0053] In this embodiment, since the rubber roller 120 is rotatably connected to two connecting members 150 through a rotating shaft 122 respectively, and avoiding grooves 1314 are respectively formed at both ends of the dust removal assembly 130, each avoiding groove 1314 is respectively communicated with a dust removal port 1312 and a dust removal channel 1311, and each avoiding groove 1314 is used for avoiding the rotating shaft 122, so that at least part of the rubber roller 120 can be received in the dust removal channel 1311 to better shield the roller surface of the rubber roller 120, thereby reducing the possibility of dust generation on the rubber roller 120.

[0054] As Figures 2 to 4 shown, further, the embossing device 100 further includes a first driving member 160, and the first driving member 160 is connected to one end of the rotating shaft 122 and is used for driving the rotating shaft 122 to rotate relative to the two connecting members 150 to drive the rubber roller 120 to rotate around its axis.

[0055] In this embodiment, the first driving member 160 can drive the rubber roller 120 to rotate around its axis, so as to cooperate with the embossing roller 110 to roll-press the pole piece to form a recess while also playing a role in conveying the pole piece, thereby facilitating the subsequent winding equipment to wind the pole piece and the diaphragm.

[0056] Exemplarily, the first driving member 160 can be a device capable of outputting torque such as a rotating motor, a driving motor, etc., and no specific limitation is made here.

[0057] As Figure 1 and Figure 2 shown, further, the embossing device 100 further includes a second driving member 170 and a transmission member 180. The transmission member 180 is slidably disposed on the fixed bracket 140, the embossing roller 110 is rotatably connected to one side of the transmission member 180, and the second driving member 170 is disposed on the fixed bracket 140 and is connected to the side of the transmission member 180 away from the embossing roller 110 for driving the transmission member 180 to slide relative to the fixed bracket 140 to drive the embossing roller 110 to move in a direction close to or away from the rubber roller 120.

[0058] In this embodiment, the second driving member 170 drives the transmission member 180 to slide relative to the fixed bracket 140 to drive the embossing roller 110 to move in a direction close to or away from the rubber roller 120, so that the pressure applied by the embossing roller 110 to the pole piece can be adjusted, thereby controlling the depth of the recess formed on the pole piece.

[0059] Exemplarily, the second driving member 170 can be a device capable of outputting linear motion, such as a cylinder, a linear motor module, etc., and no specific limitation is made here. It should be noted that when the second driving member 170 is a cylinder, a pneumatic pressure regulating member 190 can be arranged on the fixed bracket 140. The pneumatic pressure regulating member 190 is connected to the cylinder and is used to control the output pressure of the cylinder. When the pneumatic pressure regulating member 190 receives a signal for pole piece adjustment, by controlling the output pressure of the cylinder, the pressure for the embossing roller 110 to roll the pole piece can be adjusted, so as to obtain indentations with different depths.

[0060] As Figure 1 shown, further, a sliding member 181 is arranged on the transmission member 180, and a guiding member 142 is arranged on the fixed bracket 140. The sliding member 181 is slidably connected to the guiding member 142. A first limiting member 143 and a second limiting member 144 are arranged on the fixed bracket 140. The first limiting member 143 is located at one end of the guiding member 142 away from the rubber roller 120, and the second limiting member 144 is located at one end of the guiding member 142 close to the rubber roller 120.

[0061] In this embodiment, through the sliding connection between the sliding member 181 and the guiding member 142, the guiding effect on the transmission member 180 can be achieved, so that the embossing roller 110 can roll the pole piece better. The first limiting member 143 and the second limiting member 144 can respectively abut against the sliding member 181 to limit the stroke of the embossing roller 110 moving in the direction close to or away from the rubber roller 120, achieving a limiting effect and reducing the risk of device damage caused by the embossing roller 110 hitting the rubber roller 120.

[0062] Exemplarily, the sliding member 181 is a slider, and the guiding member 142 is a guide rail. Of course, the sliding member 181 can also be a linear bearing, and the guiding member 142 can also be a guide shaft.

[0063] As Figure 1 and Figure 2 shown, further, a plurality of openings 182 are spacedly arranged on the transmission member 180, which can reduce the weight of the transmission member 180, so that the second driving member 170 can adopt a smaller power, reducing the manufacturing cost of the embossing device 100.

[0064] In a second aspect, an embodiment of the present application provides a winding device, including the embossing device 100 in any one of the above first aspects.

[0065] It can be understood that since the winding device provided in this embodiment has the embossing device 100 in any one of the above embodiments, it has all the beneficial effects of the embossing device 100, and will not be listed one by one here.

[0066] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. 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 this application. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0067] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. An embossing device, characterized in that, Comprising: An embossing roller capable of rotating about its axis, and a plurality of embossing portions are provided on the roller surface of the embossing roller; A rubber roller capable of rotating about its axis, and a rubber layer is provided on the roller surface of the rubber roller. The rubber roller is located below the embossing roller. The embossing roller and the rubber roller jointly define a limiting space for passing through the electrode sheet. At least some of the plurality of embossing portions are located in the limiting space, and at least a part of the rubber layer is located in the limiting space; A dust removal assembly defining a dust removal channel and having a dust removal port communicating with the dust removal channel. At least a part of the rubber roller is accommodated in the dust removal channel through the dust removal port. The dust removal assembly is used to generate a suction airflow in the dust removal channel.

2. The embossing device according to claim 1, characterized in that, The dust removal assembly includes a dust removal cover, a dust removal pipe and a suction member. The dust removal cover is sleeved on the rubber roller and is provided with the dust removal port. The dust removal pipe is connected between the dust removal cover and the suction member. The dust removal pipe and the dust removal cover jointly define the dust removal channel.

3. The embossing device according to claim 2, wherein The dust removal pipe includes a first pipe body and a second pipe body. The first pipe body is bent and connected between the second pipe body and the dust removal cover. The first pipe body, the second pipe body and the dust removal cover jointly define the dust removal channel. The suction member is connected to one end of the second pipe body away from the first pipe body.

4. The embossing device according to any one of claims 1 to 3, characterized in that, The embossing device further includes a fixed bracket and two connecting members. The two connecting members are spaced apart on the fixed bracket. The rubber roller is respectively rotatably connected to the two connecting members; in the axial direction of the rubber roller, connection portions are respectively provided at both ends of the dust removal assembly, and each connection portion is connected to one of the connecting members.

5. The embossing device according to claim 4, wherein A through hole is provided on the fixed bracket for passing through the electrode sheet and communicating with the limiting space.

6. The embossing device according to claim 4, characterized in that, The rubber roller is respectively rotatably connected to the two connecting members through a rotating shaft; in the axial direction of the rubber roller, avoidance grooves are respectively provided at both ends of the dust removal assembly. Each avoidance groove is respectively communicated with the dust removal port and the dust removal channel, and each avoidance groove is used to avoid the rotating shaft.

7. The embossing device according to claim 6, characterized in that, The embossing device further includes a first driving member connected to one end of the rotating shaft for driving the rotating shaft to rotate relative to the two connecting members to drive the rubber roller to rotate about its axis.

8. The embossing device according to claim 4, characterized in that The embossing device further includes a second driving member and a transmission member. The transmission member is slidably provided on the fixed bracket. The embossing roller is rotatably connected to one side of the transmission member. The second driving member is provided on the fixed bracket and is connected to the side of the transmission member away from the embossing roller for driving the transmission member to slide relative to the fixed bracket to drive the embossing roller to move in a direction close to or away from the rubber roller.

9. The embossing device according to claim 8, characterized in that, A sliding member is provided on the transmission member, and a guiding member is provided on the fixed bracket. The sliding member is slidably connected to the guiding member. A first limiting member and a second limiting member are provided on the fixed bracket. The first limiting member is located at one end of the guiding member away from the rubber roller, and the second limiting member is located at one end of the guiding member close to the rubber roller.

10. A winding device, characterized in that, Including the embossing device according to any one of claims 1 to 9.

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