Pole piece gluing device and winding tool

Abstract

The utility model provides a pole piece gluing device and winding frock, pole piece gluing device includes support, roller and drive structure, the inside of support is provided with the circulation channel that the adhesive flows, roller is rotatingly provided on the support, roller has the cavity that communicates with the circulation channel setting, the peripheral surface of roller has the liquid hole that communicates with the cavity, and the drive structure is provided with the liquid hole that passes through the cavity. The liquid passing hole is arranged towards a to-be-coated area of the pole piece, the driving structure is in driving connection with the support, the driving structure drives the roller to roll through the support, the adhesive forms a coating layer in the to-be-coated area through the liquid passing hole, and the coating layer is located in an R-angle area of the pole piece. According to the pole piece gluing device, the roller is adopted for achieving coating of the adhesive, the roller conducts coating on the to-be-coated area to form the coating layer when rolling on the pole piece, and the coating layer composed of the adhesive is formed on the pole piece, so that the structural strength of the R corner of the pole piece is improved; therefore, the problem that the R corner of the pole piece is easy to break and fall off due to bending in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery-related technology, specifically to an electrode coating device and a winding fixture. Background Technology

[0002] With the widespread use of rechargeable batteries in mobile phones, computers, power tools and electric vehicles, people are demanding higher and higher energy density from rechargeable batteries.

[0003] Currently, electrode assemblies for secondary batteries are mainly divided into wound electrode assemblies and stacked electrode assemblies. During the winding process, the electrode sheet forms a multi-turn structure. The inner ring of the electrode sheet is prone to breakage and material loss at the bending points (i.e., the radius of curvature). Existing technology uses adhesive tape to adhere to the electrode surface to overcome this breakage issue. However, this method requires manual application or an additional pressing mechanism to precisely attach the tape to the electrode sheet, and the winding process must follow the tape application. This is complex and prone to gaps between the tape and the electrode sheet.

[0004] As can be seen from the above, the existing methods for solving the problem of breakage and material loss at the inner circle R-corner of the electrode sheet in the wound electrode assembly are complicated to operate. Utility Model Content

[0005] The main purpose of this utility model is to provide an electrode coating device and a winding fixture to solve the problem that the inner circle R-corner of the electrode in the winding electrode assembly is prone to breakage and material loss due to bending in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an electrode coating apparatus is provided. The electrode coating apparatus includes a support, a roller, and a drive structure. The support has a flow channel for adhesive to flow through. The roller is rotatably mounted on the support and has a cavity communicating with the flow channel. The outer circumferential surface of the roller has a liquid passage hole communicating with the cavity. The liquid passage hole is positioned towards the area of ​​the electrode to be coated. The drive structure is driven and connected to the support. The drive structure drives the roller to roll along the length direction of the area of ​​the electrode to be coated through the support. The adhesive forms a coating layer in the area to be coated through the liquid passage hole. After the electrode is wound to form an electrode assembly, the coating layer is located in the R-corner area of ​​the electrode.

[0007] Furthermore, the support includes a first frame and a second frame. The first frame is arranged on both sides of the roller along the roller axis. The first end of the first frame is rotatably connected to the roller. The first frame has a first flow channel communicating with the cavity. The drive structure is connected to one end of the second frame. The second end of the first frame is connected to the other end of the second frame. The second frame has a second flow channel communicating with the first flow channel. The first flow channel and the second flow channel cooperate to form a flow channel.

[0008] Furthermore, the first frame, which is arranged symmetrically about the second frame, is located on both sides of the roller axis; and / or the diameter of the second flow channel is larger than the diameter of the first flow channel.

[0009] Furthermore, the first frame includes a first arm section, a second arm section, and a third arm section that are bent sequentially. The first arm section is rotatably connected to the roller, and the third arm section of the first frame, which is located on both sides of the roller's axial direction, extends in a mutually oriented direction and is connected to the second frame.

[0010] Furthermore, the first arm segment, the third arm segment, and the electrode are parallel; and / or the second arm segment is perpendicular to the first arm segment; and / or the second arm segment is parallel to the second frame; and / or the extension length of the second arm segment is greater than the radius of the roller.

[0011] Furthermore, the roller has a hole structure located at the center of two end faces, the hole structure is connected to the cavity, and the first end of the first frame is rotatably located at the hole structure.

[0012] Furthermore, the driving structure includes a telescopic rod and a driving component. The end of the telescopic rod is connected to the bracket. The telescopic rod has a hollow structure that communicates with the flow channel. The telescopic rod is arranged parallel to the electrode. The driving component is driven by the telescopic rod. The driving component provides driving force for the telescopic rod to drive the bracket and roller to reciprocate along the length direction of the area to be coated.

[0013] Furthermore, the bracket and the telescopic rod are set at an angle, with the angle being greater than or equal to 90°.

[0014] Furthermore, the electrode coating device also includes a back plate and a heating element. The back plate is used to place the electrode, the rollers are located on the side of the electrode away from the back plate, and the heating element is located inside the back plate.

[0015] According to another aspect of the present invention, a winding fixture is provided, which includes the above-mentioned electrode coating device. One or more electrode coating devices are provided. The winding fixture also includes an electrode unwinding device and an electrode winding device, with the electrode coating device disposed between the electrode unwinding device and the electrode winding device.

[0016] The electrode coating device using the technical solution of this utility model includes a support, a roller, and a drive structure. The support has a flow channel for adhesive to flow inside. The roller is rotatably mounted on the support and has a cavity communicating with the flow channel. The outer circumferential surface of the roller has a liquid passage hole communicating with the cavity. The liquid passage hole is positioned towards the area of ​​the electrode to be coated. The drive structure is driven and connected to the support. The drive structure drives the roller to roll along the length of the area of ​​the electrode to be coated through the support. The adhesive forms a coating layer in the area to be coated through the liquid passage hole. After the electrode is wound to form an electrode assembly, the coating layer is located in the R-corner area of ​​the electrode.

[0017] As can be seen from the above, the electrode coating device of this application uses rollers to apply adhesive. The drive structure drives the rollers to roll through the bracket. When the rollers roll on the electrode, they coat the area to be coated to form a coating layer. By forming a coating layer composed of adhesive on the electrode, the structural strength at the R-corner of the electrode is improved, thereby overcoming the problem of easy breakage and material loss at the R-corner of the electrode when the electrode is wound to form an electrode assembly in the prior art.

[0018] This application employs a roller mounted on a support, with a flow channel on the support communicating with the inner cavity of the roller to form an adhesive supply channel. Adhesive is applied to the radius (R) area of ​​the electrode sheet by overflowing through a liquid passage, which improves the uniformity of coating and the stability of the coating operation. This application allows for the repeated use of the support and roller, thus improving the production efficiency of the electrode assembly.

[0019] This application employs a drive structure to move rollers along the length of the area to be coated, thereby coating the electrode sheet. The rolling rollers also help improve coating efficiency. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the overall structure of the electrode coating device provided in this application;

[0022] Figure 2 A schematic diagram of the mounting structure of the bracket and rollers provided in this application;

[0023] Figure 3 This is a schematic diagram of the structure of the electrode provided in this application.

[0024] The above figures include the following reference numerals:

[0025] 10. Support; 110. First frame; 111. First flow channel; 1110. First arm section; 1120. Second arm section; 1130. Third arm section; 120. Second frame; 121. Second flow channel; 20. Roller; 210. Liquid passage hole; 30. Telescopic rod; 40. Back plate; 50. Electrode; 510. Coating layer. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Example 1

[0030] To address the problem of breakage and material loss at the inner radius (R-corner) of the electrode sheet in existing wound electrode assemblies due to bending, this application provides an electrode sheet adhesive coating device. This device applies adhesive to the inner radius (R-corner) of the electrode sheet to form a coating layer. The structure of this coating layer increases the strength at the inner radius (R-corner) of the electrode sheet, preventing breakage during bending at the inner radius (R-corner) of the electrode sheet during the winding process to form the electrode assembly.

[0031] It is understandable that, for wound electrode assemblies, the inner circle's R-corner area is more prone to breakage and material loss compared to the outer circle's R-corner area. The inner circle typically refers to the inner 1-4 circles. Therefore, the electrode coating apparatus provided in this application is used to coat the inner 1-4 circles of the electrode with adhesive to form a coating layer, thereby improving the structural strength of the inner 1-4 circles of the electrode at the R-corner area.

[0032] The adhesive can be polyvinylidene fluoride (PVDF), or other types of liquids with adhesive properties. The adhesive is supplied by an external adhesive supply device.

[0033] like Figures 1 to 3 As shown, the electrode coating device includes a support 10, a roller 20, and a drive structure. The support 10 has a flow channel for adhesive to flow inside. The roller 20 is rotatably mounted on the support 10 and has a cavity communicating with the flow channel. The outer circumferential surface of the roller 20 has a liquid passage hole 210 communicating with the cavity. The liquid passage hole 210 is positioned towards the area to be coated on the electrode 50. The drive structure is driven to the support 10. The drive structure drives the roller 20 to roll along the length of the area to be coated on the electrode 50 through the support 10. The adhesive forms a coating layer 510 on the area to be coated through the liquid passage hole 210. After the electrode 50 is wound to form an electrode assembly, the coating layer 510 is located in the R-corner area of ​​the electrode 50.

[0034] It is understood that the coating layer 510 is located in the inner 1-4 turns of the radius corner region of the electrode 50. For example, as... Figure 3 As shown, the coating layer 510 is located in the R-corner region 1.5 circles inside the electrode 50.

[0035] The electrode assembly is formed by winding the electrode 50 and the diaphragm. Specifically, the electrode 50 and the diaphragm are wound into a multi-turn structure. The wound electrode assembly is roughly elliptical in shape, with the R angle being two opposite corners of the ellipse.

[0036] It is understandable that electrode 50 can be either a positive electrode or a negative electrode.

[0037] Specifically, the electrode coating device of this application uses a roller 20 to apply adhesive. The drive structure drives the roller 20 to roll through the bracket 10. When the roller 20 rolls on the electrode 50, it coats the area to be coated to form a coating layer 510. By forming a coating layer 510 composed of adhesive on the electrode 50, the structural strength at the R-corner of the electrode 50 is improved, thereby overcoming the problem of easy breakage and material loss at the R-corner of the electrode 50 when the electrode 50 is wound to form an electrode assembly in the prior art.

[0038] The length direction of the area to be coated is Figure 1 The X direction is shown.

[0039] In this embodiment, in actual use, according to the design of the electrode assembly to be wound, the area to be coated can be determined on the electrode 50 first. The area to be coated is the inner 1-4 turns of the R-corner area of ​​the electrode 50 of the electrode assembly. The R-corner area can be determined according to the length of the electrode 50 of the electrode assembly to be processed and the model of the winding needle. After determining the area to be coated, the roller 20 is set at one end of the length direction of the area to be coated, that is, the starting end of the coating area. The coating layer 510 is formed by the roller 20 rolling along the length direction of the area to be coated. After the coating is completed and the winding is performed, the area to be coated is exactly at the R-corner position of the electrode assembly.

[0040] This application uses a roller 20 that is rotatably mounted on a support 10. The flow channel on the support 10 is connected to the inner cavity of the roller 20 to form an adhesive supply channel. The adhesive is applied to the R-corner area of ​​the electrode 50 by overflowing the liquid passage 210, which helps to improve the uniformity of the coating and the stability of the coating operation.

[0041] like Figure 1 As shown, this application uses a drive structure to drive the roller 20 to move along the length of the area to be coated, so as to coat the R-corner of the electrode 50. The roller 20, which is set to roll, helps to improve the coating efficiency.

[0042] Specifically, the drive structure includes a telescopic rod 30 and a drive member. The end of the telescopic rod 30 is connected to the bracket 10, and the drive member is driven to the telescopic rod 30. The drive member provides driving force for the telescopic rod 30 to drive the bracket 10 and the roller 20 to reciprocate along the length of the area to be coated.

[0043] The driving component can be a motor.

[0044] In this embodiment, the telescopic rod 30 is arranged parallel to the electrode 50. The parallel arrangement of the telescopic rod 30 and the electrode 50 enables the application of a driving force to the support 10 and the roller 20 parallel to the electrode 50, thereby facilitating the stable movement of the driving roller 20 along the coating area of ​​the electrode 50.

[0045] In this embodiment, the telescopic rod 30 has a hollow structure communicating with the flow channel. The hollow structure is used to allow the adhesive to pass through. The adhesive passes through the hollow structure, the flow channel, and the inner cavity in sequence, and then overflows through the liquid passage 210 to the coating area of ​​the electrode 50 to form the coating layer 510. The opening shape of the liquid passage 210 can be one of a circle, an ellipse, or a polygon.

[0046] like Figure 1 As shown in the figure, in this application, the bracket 10 and the telescopic rod 30 are set at an angle, the angle being greater than or equal to 90°.

[0047] Specifically, during the process of coating the electrode 50 with adhesive, the telescopic rod 30 is parallel to the electrode 50, and the bracket 10 and the telescopic rod 30 are arranged at an angle of greater than or equal to 90°. This helps to ensure the stability of the roller 20 during operation and to ensure that the roller 20 is coated evenly, so as to achieve the structural strength at the R-angle of the electrode 50.

[0048] In this embodiment, when the angle between the bracket 10 and the telescopic rod 30 is greater than 90°, one end of the bracket 10 is connected to the telescopic rod 30, and the other end of the bracket 10 extends toward the side away from the telescopic rod 30 and is connected to the roller 20.

[0049] In this embodiment, the driving component drives the telescopic rod 30 to extend and retract. When the telescopic rod 30 extends, it drives the roller 20 to roll unidirectionally along the length of the area to be coated to complete the coating of the current area to be coated and form the coating layer 510. After the electrode 50 moves forward, the telescopic rod 30 retracts and drives the roller 20 to coat the next area to be coated to form the coating layer 510. The telescopic rod 30 drives the roller 20 to reciprocate along the length of the area to be coated to complete the coating operation of two areas to be coated. The structural arrangement of the telescopic rod 30, the bracket 10 and the roller 20 in this application is beneficial to improving the coating efficiency.

[0050] like Figures 1 to 3As shown, the support 10 includes a first frame 110 and a second frame 120. The first frame 110 is axially arranged on both sides of the roller 20. The first end of the first frame 110 is rotatably connected to the roller 20. The first frame 110 has a first flow channel 111 communicating with the cavity. The driving structure is connected to one end of the second frame 120. The second end of the first frame 110 is connected to the other end of the second frame 120. The second frame 120 has a second flow channel 121 communicating with the first flow channel 111. The first flow channel 111 and the second flow channel 121 cooperate to form a flow channel.

[0051] Specifically, the roller 20 is mounted on the first frame 110, and the first frame 110 is connected to the telescopic rod 30 through the second frame 120. The structure in which the first frame 110 and the second frame 120 are configured together helps to ensure the strength of the overall structure, thereby ensuring the stability of the drive structure driving the roller 20 to roll through the bracket 10, and helping to improve the efficiency of the adhesive coating on the area to be coated on the electrode 50.

[0052] The first frame 110, which is set on both sides of the roller 20 axially, is symmetrically arranged about the second frame 120. The first frame 110 is integrally formed into a frame structure, which not only helps to improve the stability of the roller 20 installation position so that the adhesive can be evenly coated on the area to be coated, but also helps to improve the stability of the first frame 110 so as to improve its durability.

[0053] The adhesive inside the second flow channel 121 of the second frame 120 flows into the first flow channels 111 of the two first frames 110, thus diverting the flow into the inner cavity of the roller 20. This improves the smoothness of the flow and consequently increases the adhesive supply efficiency. Furthermore, the parallel arrangement of the two first supports 10 with two first flow channels 111 ensures that even if one first flow channel 111 becomes blocked, the other first flow channel 111 can still supply adhesive normally. The symmetrical arrangement of the first frames 110 with respect to the second frame 120 helps ensure that the adhesive flows at a constant speed within the two first flow channels 111.

[0054] In this embodiment, the diameter of the second flow channel 121 is larger than the diameter of the first flow channel 111. The adhesive inside the second flow channel 121 is diverted into the interior of the two first flow channels 111. The large-diameter structure of the second flow channel 121 facilitates the flow of the adhesive. This application enables the bracket 10 and roller 20 to be reused repeatedly, which helps to improve the production efficiency of the electrode assembly.

[0055] like Figure 2As shown, the first frame 110 includes a first arm section 1110, a second arm section 1120 and a third arm section 1130 arranged in sequence. The first arm section 1110 is rotatably connected to the roller 20. The third arm section 1130 of the first frame 110, which is arranged on both sides of the roller 20, extends in a mutually oriented direction and is connected to the second frame 120.

[0056] The first frame 110 adopts a three-section structure, which is convenient for processing and also facilitates assembly with the roller 20 and the second frame 120, thus improving assembly efficiency.

[0057] Specifically, the first arm segment 1110, the third arm segment 1130, and the electrode 50 are parallel. The parallel structure of the first arm segment 1110 and the electrode 50 helps to ensure that the roller 20 is placed upright on the electrode 50 and can roll along the electrode 50. The arrangement of the first arm segment 1110 ensures that the roller 20 rolls stably on the electrode 50. The parallel structure of the third arm segment 1130 and the electrode 50 helps to ensure the stability of the connection between the first frame 110 and the second frame 120.

[0058] Furthermore, the second arm segment 1120 is perpendicular to the first arm segment 1110. The use of the second arm segment 1120, which is perpendicular to the first arm segment 1110, to support the first arm segment 1110 and the third arm segment 1130 improves the structural strength of the first frame 110.

[0059] In this embodiment, the second arm segment 1120 is parallel to the second frame 120, and the extension length of the second arm segment 1120 is greater than the radius of the roller 20. This ensures that the second frame 120 is positioned on the top side of the roller 20 and avoids interference between the roller 20 and the second frame 120, thus improving the operability of the structure.

[0060] In this embodiment, the roller 20 has a hole structure located at the center of two end faces, which communicates with the cavity. The first end of the first frame 110 is rotatably located at the hole structure. The roller 20 is cylindrical in shape, and the first frame 110 is rotatably connected to the center of the two end faces of the roller 20 in the axial direction. This ensures that the roller 20 rotates on its own axis while rolling along the electrode 50, thus preventing the roller 20 from shifting during the adhesive coating process. This also ensures that the adhesive overflowing from the roller 20 is evenly coated on the area to be coated to form the coating layer 510.

[0061] like Figure 1 As shown, the electrode coating device also includes a back plate 40 and a heating element. The back plate 40 is used to place the electrode 50, the roller 20 is disposed on the side of the electrode 50 away from the back plate 40, and the heating element is disposed inside the back plate 40.

[0062] The electrode 50 is mounted on the back plate 40 for support. When the electrode 50 stops moving, the roller 20 rolls and coats the area to be coated on the electrode 50 with adhesive to form a coating layer 510. When the next area to be coated needs to be coated with adhesive, the electrode 50 is moved so that the next area to be coated is positioned opposite the roller 20. The electrode 50 stops moving again, and the roller 20, driven by the drive structure, completes the roll coating of the next area to be coated with adhesive to form a coating layer 510.

[0063] In this embodiment, a heating element is provided inside the back plate 40. The heating element can be an electric heating wire. The back plate 40 is heated by the heating element so that the adhesive applied to the area to be coated can be quickly shaped to form an adhesive layer, thereby avoiding the adhesive being applied to the non-coated area, thus ensuring the accuracy of adhesive coating and ensuring production efficiency.

[0064] Example 2

[0065] This embodiment provides a winding fixture, which includes the electrode coating device in Embodiment 1.

[0066] Specifically, the winding fixture also includes an electrode unwinding device and an electrode winding device, with the electrode coating device located between the electrode unwinding device and the electrode winding device.

[0067] In this process, the electrode 50 on the electrode unwinding device moves toward the electrode winding device, the electrode 50 unwound by the electrode unwinding device is set on the back plate 40 and can move along the back plate 40, the electrode coating device coats the electrode 50 located on the back plate 40, and the electrode 50 can be moved and set on the back plate 40 to facilitate the roller 20 to perform coating operations on different areas to be coated.

[0068] In this embodiment, a cutter is provided between the electrode unwinding device and the electrode coating device to cut the electrode 50. During the coating process, the electrode unwinding device unwinds the electrode. According to the design of the electrode assembly to be wound, the area to be coated can be determined on the electrode 50 first. During the pause between the cutter cutting the electrode 50, the drive structure drives the roller 20 to roll along the length of the area to be coated. The adhesive is coated on the electrode 50 through the liquid passage 210 to form a strip-shaped coating layer 510.

[0069] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0070] The electrode coating apparatus of this application uses a roller 20 to apply adhesive. The drive structure drives the roller 20 to roll through the bracket 10. When the roller 20 rolls on the electrode 50, it coats the area to be coated to form a coating layer 510. By forming a coating layer 510 composed of adhesive on the electrode 50, the structural strength at the R-corner of the electrode 50 is improved, thereby overcoming the problem of easy breakage and material loss at the R-corner of the electrode 50 when the electrode 50 is wound to form an electrode assembly in the prior art.

[0071] This application uses a roller 20 that is rotatably mounted on a support 10. The flow channel on the support 10 is connected to the inner cavity of the roller 20 to form an adhesive supply channel. The adhesive is applied to the R-corner area of ​​the electrode 50 by overflowing the liquid passage 210, which helps to improve the uniformity of the coating and the stability of the coating operation.

[0072] This application employs a drive structure to drive the roller 20 to move along the length of the area to be coated, thereby coating the electrode 50. The roller 20, which is moved and rolled, helps to improve the coating efficiency.

[0073] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0074] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0075] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electrode coating device, characterized in that, include: The support (10) has a flow channel inside for the adhesive to flow; Roller (20), the roller (20) is rotatably mounted on the bracket (10), the roller (20) has a cavity communicating with the flow channel, and the outer peripheral surface of the roller (20) has a liquid passage hole (210) communicating with the cavity, the liquid passage hole (210) is disposed towards the coating area of ​​the electrode (50); The driving structure is driven to be connected to the bracket (10). The driving structure drives the roller (20) to roll along the length direction of the area to be coated on the electrode (50) through the bracket (10). The adhesive forms a coating layer (510) on the area to be coated through the liquid passage (210). After the electrode (50) is wound to form an electrode assembly, the coating layer (510) is located in the R-corner area of ​​the electrode (50).

2. The electrode coating apparatus according to claim 1, characterized in that, The support (10) includes: A first frame (110) is axially disposed on both sides of the roller (20) along the roller (20), and the first end of the first frame (110) is rotatably connected to the roller (20). The first frame (110) has a first flow channel (111) communicating with the cavity. The second frame (120) is connected to one end of the drive structure, and the second end of the first frame (110) is connected to the other end of the second frame (120). The second frame (120) has a second flow channel (121) that communicates with the first flow channel (111). The first flow channel (111) and the second flow channel (121) cooperate to form the flow channel.

3. The electrode coating apparatus according to claim 2, characterized in that, The first frame (110) disposed on both sides of the roller (20) axially is symmetrically disposed about the second frame (120); and / or The diameter of the second flow channel (121) is larger than the diameter of the first flow channel (111).

4. The electrode coating apparatus according to claim 2, characterized in that, The first frame (110) includes a first arm segment (1110), a second arm segment (1120) and a third arm segment (1130) arranged in sequence. The first arm segment (1110) is rotatably connected to the roller (20). The third arm segment (1130) of the first frame (110) arranged on both sides of the roller (20) extends in a mutually oriented direction and is connected to the second frame (120).

5. The electrode coating apparatus according to claim 4, characterized in that, The first arm segment (1110), the third arm segment (1130), and the electrode (50) are parallel; and / or The second arm segment (1120) is perpendicular to the first arm segment (1110); and / or The second boom segment (1120) is parallel to the second frame (120); and / or The extension length of the second arm segment (1120) is greater than the radius of the roller (20).

6. The electrode coating apparatus according to claim 2, characterized in that, The roller (20) has a hole structure located at the center of two end faces, the hole structure being connected to the cavity, and the first end of the first frame (110) being rotatably located at the hole structure.

7. The electrode coating apparatus according to claim 1, characterized in that, The driving structure includes: Telescopic rod (30), the end of which is connected to the bracket (10), the telescopic rod (30) has a hollow structure communicating with the flow channel, and the telescopic rod (30) is arranged parallel to the electrode (50); A driving component is connected to the telescopic rod (30) and provides driving force for the telescopic rod (30) to drive the bracket (10) and the roller (20) to reciprocate along the length direction of the area to be coated.

8. The electrode coating apparatus according to claim 7, characterized in that, The bracket (10) and the telescopic rod (30) are set at an angle, the angle being greater than or equal to 90°.

9. The electrode coating apparatus according to any one of claims 1 to 8, characterized in that, The electrode coating device further includes: A back plate (40) is used to place the electrode (50), and the roller (20) is disposed on the side of the electrode (50) away from the back plate (40); A heating element is disposed within the back plate (40).

10. A winding tool, characterized in that, include: At least one electrode coating device, wherein the electrode coating device is the electrode coating device according to any one of claims 1 to 9; An electrode unwinding device and an electrode winding device are provided, wherein the electrode coating device is disposed between the electrode unwinding device and the electrode winding device.

Images