Coating assembly and device based on sodium ion battery aluminum foil

Abstract

The utility model provides a coating assembly and device based on a sodium ion battery aluminum foil, the coating assembly based on the sodium ion battery aluminum foil comprises two brushing assemblies, and each brushing assembly comprises a fixing support and a liquid brushing piece. The fixing supports of the two brushing assemblies are arranged close to the two sides of the transfer coating machine correspondingly. The liquid brushing piece comprises a brush head and a brush cylinder; the brush cylinder is connected with the fixing support, the brush cylinder is provided with a treatment liquid storage cavity, one end of the brush head is installed below the brush cylinder, the liquid inlet end of the brush head is communicated with the liquid outlet end of the treatment liquid storage cavity, and the other end of the brush head extends to the position corresponding to the aluminum foil discharging end of the transfer coating machine so as to brush aluminum foil passing through the aluminum foil discharging end. The surfaces of the edges of the two sides of the aluminum foil are automatically brushed, so that the dyne value of the surfaces of the edges of the two sides of the aluminum foil is increased, the problem of thick edges of the aluminum foil caused by casting of negative electrode hard carbon slurry liquid is solved, and a time-consuming and labor-consuming coating mode of manual operation is effectively replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium-ion battery aluminum foil production, in particular to a coating assembly and device for sodium-ion battery aluminum foil. Background Art

[0002] Generally, aluminum foil is used as a current collector for the negative electrode of a sodium-ion battery, and then a negative hard carbon paste containing active substances needs to be coated on the aluminum foil to make the negative electrode of the sodium-ion battery.

[0003] Among them, during the coating process of the negative hard carbon paste, due to the problem of low dyne value on the surface of the aluminum foil, the adhesion of the negative hard carbon paste coated on the surface of the aluminum foil is poor. At the same time, under the action of the surface tension of the negative hard carbon paste liquid, it is easy for the negative hard carbon paste liquid on the surfaces of both edges of the aluminum foil to flow during the drying process, resulting in the situation of thick edges of the aluminum foil and even curling.

[0004] To solve the above problem of thick edges of the aluminum foil, the traditional method is to manually coat a treatment liquid such as phosphoric acid, nitric acid, and polyacrylic acid resin on the surfaces of both edges of the aluminum foil to increase the dyne value of the surfaces of both edges of the aluminum foil, so as to achieve better adhesion of the negative hard carbon paste or active substances and bond them to the surfaces of both edges of the aluminum foil, thereby preventing the negative hard carbon paste liquid from flowing and causing the problem of thick edges of the aluminum foil. However, the manual coating method cannot achieve uniform and efficient coating on the surfaces of both edges of the aluminum foil, so the manual coating method is time-consuming and laborious.

[0005] Therefore, there is an urgent need for a device or equipment that can uniformly and efficiently coat the above treatment liquid on the surfaces of both edges of the aluminum foil. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a coating assembly and device for sodium-ion battery aluminum foil that can uniformly and efficiently coat the treatment liquid on the surfaces of both edges of the aluminum foil, thereby effectively increasing the dyne value of the surfaces of both edges of the aluminum foil and effectively avoiding the problem of thick edges of the aluminum foil.

[0007] The purpose of the utility model is achieved by the following technical solutions:

[0008] A coating assembly for sodium-ion battery aluminum foil includes two brushing assemblies, and each of the brushing assemblies includes:

[0009] A fixed bracket, and the fixed brackets of the two brushing assemblies are respectively arranged adjacent to both sides of the transfer coater;

[0010] The liquid brush part includes a brush head and a brush barrel; the brush barrel is connected to the fixed bracket, the brush barrel is provided with a treatment liquid storage chamber, one end of the brush head is installed under the brush barrel, the liquid inlet end of the brush head is connected with the liquid outlet end of the treatment liquid storage chamber, and the other end of the brush head extends to the position corresponding to the aluminum foil discharge end of the transfer coating machine to brush the aluminum foil passing through the aluminum foil discharge end.

[0011] In one embodiment, the fixed bracket includes a base, a first electromagnetic guide rail, a second electromagnetic guide rail and an electromagnetic slider; one end of the first electromagnetic guide rail is fixedly connected to the base, one end of the electromagnetic slider is slidably connected to the other end of the first electromagnetic guide rail, one end of the second electromagnetic guide rail is slidably connected to the other end of the electromagnetic slider, and a positioning sleeve is formed at the other end of the second electromagnetic guide rail, and the positioning sleeve is fixedly mounted on the outer peripheral wall of the brush cylinder.

[0012] In one embodiment, an extension direction of the first electromagnetic guide rail and an extension direction of the second electromagnetic guide rail are arranged at a preset angle.

[0013] In one embodiment, a limiting portion is formed at one end of the second electromagnetic guide rail, and a width of the limiting portion is greater than a width of the second electromagnetic guide rail.

[0014] In one embodiment, a liquid injection hole is formed at one end of the brush barrel away from the brush head, an inner peripheral wall of the liquid injection hole is formed with an internal thread, and the liquid injection hole is connected to the treatment liquid storage chamber;

[0015] The liquid brushing part also includes a cylinder cover, one end of which is formed with an external thread matching the internal thread of the liquid injection hole so that the cylinder cover is threadedly connected to the brush cylinder, and the other end of the cylinder cover is formed with a twist ring portion.

[0016] In one embodiment, the brush barrel is cylindrical.

[0017] In one embodiment, the liquid brush part further includes a cover cap, which is disposed on the other end of the brush head and is buckled with the brush barrel.

[0018] In one embodiment, the brush barrel, the barrel cover and the cap are integrally formed; and / or,

[0019] The liquid brushing part is a plastic structural part.

[0020] In one embodiment, the brush head is a sponge brush head or a polyester fiber brush head.

[0021] A coating device for aluminum foil used in sodium-ion batteries, comprising a transfer coater and at least two coating assemblies for aluminum foil used in sodium-ion batteries as described in any of the above embodiments; the two coating assemblies are arranged in sequence along the direction of the transfer coater for transporting aluminum foil.

[0022] Compared with the prior art, the present utility model has at least the following advantages:

[0023] By arranging the fixing brackets of the two brushing assemblies adjacent to both sides of the transfer coater, and installing one end of the brush head below the brush barrel, and at the same time connecting the liquid inlet end of the brush head with the liquid outlet end of the treatment liquid storage cavity, the treatment liquid in the treatment liquid storage cavity can always infiltrate the other end of the brush head, and evenly brush the surfaces of both edges of the aluminum foil passing through the aluminum foil outlet end. The present utility model automatically brushes the surfaces of both edges of the aluminum foil to increase the surface dyne value of both edges of the aluminum foil, thereby preventing the problem of thick edges of the aluminum foil caused by the flow of the negative hard carbon slurry liquid, and effectively replacing the time-consuming and laborious coating method of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, 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.

[0025] Figure 1 It is a schematic structural diagram of a coating assembly for aluminum foil used in sodium-ion batteries in an embodiment;

[0026] Figure 2 For Figure 1 It is a schematic structural diagram of the brushing assembly of the coating assembly for aluminum foil used in sodium-ion batteries shown;

[0027] Figure 3 For Figure 2 It is a schematic structural diagram of the liquid brushing member of the coating assembly for aluminum foil used in sodium-ion batteries shown;

[0028] Reference numerals: Coating assembly 10 for aluminum foil used in sodium-ion batteries; Brushing assembly 10a; Fixing bracket 100; Base 110; First electromagnetic guide rail 120; Second electromagnetic guide rail 130; Positioning sleeve 1310; Limiting part 1320; Electromagnetic slider 140; Liquid brushing member 200; Brush head 210; Brush barrel 220; Treatment liquid storage cavity 2201; Liquid injection hole 2202; Barrel cover 230; Twisting ring part 2310; Cap 240; Aluminum foil 300. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] The present disclosure provides a coating assembly for sodium-ion battery aluminum foil, including two brushing assemblies, and each of the brushing assemblies includes a fixed bracket and a liquid brushing member. The fixed brackets of the two brushing assemblies are respectively arranged adjacent to both sides of the transfer coater. The liquid brushing member includes a brush head and a brush barrel; the brush barrel is connected to the fixed bracket, the brush barrel is provided with a treatment liquid storage cavity, one end of the brush head is installed below the brush barrel, the liquid inlet end of the brush head is communicated with the liquid outlet end of the treatment liquid storage cavity, and the other end of the brush head extends to the position corresponding to the aluminum foil discharge end of the transfer coater to brush the aluminum foil passing through the aluminum foil discharge end.

[0033] Please refer to Figures 1 to 3 , for a better understanding of the coating assembly 10 for sodium-ion battery aluminum foil of the present application, the following further explanatory description is made on the coating assembly 10 for sodium-ion battery aluminum foil:

[0034] The coating assembly 10 for aluminum foil used in a sodium-ion battery according to an embodiment includes two brushing assemblies 10a, and each brushing assembly 10a includes a fixed bracket 100 and a liquid brushing member 200. The fixed brackets 100 of the two brushing assemblies 10a are respectively arranged adjacent to both sides of the transfer coater. The liquid brushing member 200 includes a brush head 210 and a brush barrel 220; the brush barrel 220 is connected to the fixed bracket 100, a treatment liquid storage cavity 2201 is formed in the brush barrel 220, one end of the brush head 210 is installed below the brush barrel 220, the liquid inlet end of the brush head 210 is communicated with the liquid outlet end of the treatment liquid storage cavity 2201, and the other end of the brush head 210 extends to a position corresponding to the aluminum foil 300 outlet end of the transfer coater to brush the aluminum foil 300 passing through the aluminum foil 300 outlet end.

[0035] In this embodiment, by arranging the fixed brackets 100 of the two brushing assemblies 10a adjacent to both sides of the transfer coater, one end of the brush head 210 is installed below the brush barrel 220, and at the same time, the liquid inlet end of the brush head 210 is communicated with the liquid outlet end of the treatment liquid storage cavity 2201, so that the treatment liquid in the treatment liquid storage cavity 2201 can always soak the other end of the brush head 210, and uniformly brush the surfaces of the two side edges of the aluminum foil 300 passing through the aluminum foil 300 outlet end. The utility model automatically brushes the surfaces of the two side edges of the aluminum foil 300 to increase the dyne value of the surfaces of the two side edges of the aluminum foil 300, thereby preventing the problem of thick edges of the aluminum foil 300 caused by the flow of the negative hard carbon slurry liquid, and effectively replacing the time-consuming and laborious coating method of manual operation.

[0036] As Figure 1 and Figure 2 shown, in one embodiment, the fixed bracket 100 includes a base 110, a first electromagnetic guide rail 120, a second electromagnetic guide rail 130 and an electromagnetic slider 140; one end of the first electromagnetic guide rail 120 is fixedly connected to the base 110, one end of the electromagnetic slider 140 is slidably connected to the other end of the first electromagnetic guide rail 120, one end of the second electromagnetic guide rail 130 is slidably connected to the other end of the electromagnetic slider 140, a positioning sleeve 1310 is formed at the other end of the second electromagnetic guide rail 130, and the positioning sleeve 1310 is fixedly sleeved on the outer peripheral wall of the brush barrel 220. In one embodiment, the extending direction of the first electromagnetic guide rail 120 and the extending direction of the second electromagnetic guide rail 130 are arranged at a preset included angle.

[0037] It can be understood that the extending direction of the first electromagnetic guide rail 120 and the extending direction of the second electromagnetic guide rail 130 are set at a preset angle. In this embodiment, the preset angle is 90 degrees, so that the electromagnetic slider 140 can move up and down along the extending direction of the first electromagnetic guide rail 120 (as indicated by the Y double-headed arrow), thereby driving the second electromagnetic guide rail 130 and the liquid brushing member 200 to perform lifting adjustment, facilitating the adjustment of the pressure applied by the other end of the brush head 210 to the surface of one side edge of the aluminum foil 300. At the same time, one end of the second electromagnetic guide rail 130 is slidably connected to the other end of the electromagnetic slider 140, so that the electromagnetic slider 140 remains stationary relative to the second electromagnetic guide rail 130, while the second electromagnetic guide rail 130 can move horizontally relative to the electromagnetic slider 140 (as indicated by the X double-headed arrow), thereby facilitating the adjustment of the horizontal position of the other end of the brush head 210 of the liquid brushing member 200 applied to the surface of one side edge of the aluminum foil 300. Among them, the positioning sleeve 1310 is fixedly sleeved on the outer peripheral wall of the brush barrel 220, facilitating the positioning and installation of the brush barrel 220.

[0038] It should be noted that the working principle of the electromagnetic guide rail and the electromagnetic slider 140 belongs to the prior art and will not be elaborated in detail here.

[0039] As Figure 1 and Figure 2 shown, in one embodiment, a limiting portion 1320 is formed at one end of the second electromagnetic guide rail 130, and the width of the limiting portion 1320 is greater than the width of the second electromagnetic guide rail 130.

[0040] It can be understood that the setting of the limiting portion 1320 effectively limits the distance of the horizontal movement of the second electromagnetic guide rail 130 relative to the electromagnetic slider 140.

[0041] As Figures 1 to 2 shown, in one embodiment, a liquid injection hole 2202 is formed at the end of the brush barrel 220 facing away from the brush head 210. An internal thread is formed on the inner peripheral wall of the liquid injection hole 2202, and the liquid injection hole 2202 communicates with the treatment liquid storage cavity 2201; the liquid brushing member 200 further includes a barrel cover 230. An external thread matching the internal thread of the liquid injection hole 2202 is formed at one end of the barrel cover 230, so that the barrel cover 230 is threadedly connected to the brush barrel 220, and a torsion ring portion 2310 is formed at the other end of the barrel cover 230. In one embodiment, the brush barrel 220 is cylindrical

[0042] It can be understood that the user can screw off the other end of the cylinder cover 230 from the internal thread of the liquid injection hole 2202 by twisting the ring part 2310, so as to facilitate the user to add the corresponding treatment liquid into the treatment liquid storage cavity 2201 through the liquid injection hole 2202. Further, in order to solve the problem of the evaporation of the treatment liquid caused by the long-term exposure of the treatment liquid to the external air, in other embodiments, a sealing rubber ring (not shown in the figure) is further provided at the external thread of one end of the cylinder cover 230, so as to achieve the sealing effect of the treatment liquid in the treatment liquid storage cavity 2201 by combining the threaded connection of the cylinder cover 230 and the brush cylinder 220, thereby effectively preventing the evaporation of the treatment liquid.

[0043] As Figure 1 and Figure 3 shown, in one embodiment, the liquid brushing member 200 further includes a cap 240, and the cap 240 is covered on the other end of the brush head 210 and buckled with the brush cylinder 220.

[0044] It can be understood that when it is not necessary to use the brush head 210 of the liquid brushing member 200 to brush the aluminum foil 300, the user can cover the other end of the brush head 210 with the cap 240 and buckle it with the brush cylinder 220, thereby effectively solving the problem that the treatment liquid on the brush head 210 volatilizes due to the long-term exposure of the other end of the brush head 210 to the external air, so that the brush head 210 cannot always maintain a wet state.

[0045] As Figure 3 shown, in one embodiment, the brush cylinder 220, the cylinder cover 230 and the cap 240 are integrally formed. In one embodiment, the liquid brushing member is a plastic structural member.

[0046] It can be understood that the brush cylinder 220, the cylinder cover 230 and the cap 240 are all made of integrally formed plastic structural members, which are convenient for manufacturing and production and easy to repair and replace.

[0047] As Figure 1 and Figure 3 shown, in one embodiment, the brush head 210 is a sponge brush head 210 or a polyester fiber brush head 210.

[0048] It can be understood that the brush head 210 includes but is not limited to a sponge brush head 210 or a polyester fiber brush head 210. In this embodiment, using the sponge brush head 210 enables the treatment liquid to be more evenly and efficiently brushed on the surfaces of the two side edges of the aluminum foil 300, effectively improving the dyne value on the surfaces of the two side edges of the aluminum foil 300.

[0049] The present application also provides a coating device for sodium-ion battery aluminum foil, including a transfer coater and at least two coating assemblies 10 for sodium-ion battery aluminum foil as described in any of the above embodiments; the two coating assemblies are arranged in sequence along the direction of the aluminum foil conveyed by the transfer coater.

[0050] In this embodiment, the treatment liquid storage cavity of the first coating assembly contains phosphoric acid or nitric acid, and the treatment liquid storage cavity of the second coating assembly contains a polyacrylic acid resin. By arranging the first coating assembly and the second coating assembly in sequence along the direction of the aluminum foil conveyed by the transfer coater, first, the brush heads of the first coating assembly brush phosphoric acid or nitric acid on the surfaces of the two edges of the aluminum foil to effectively remove the oil stains and oxide layers on the surface residual rate during the aluminum foil processing, thereby increasing the surface dyne value of the two edges of the aluminum foil; secondly, the brush heads of the second coating assembly brush the polyacrylic acid resin on the surfaces of the two edges of the aluminum foil to effectively enhance the affinity and adhesion between the aluminum foil surface and the active material or the negative electrode hard carbon slurry, thereby further increasing the surface dyne value of the two edges of the aluminum foil.

[0051] Compared with the prior art, the present utility model has at least the following advantages:

[0052] By arranging the fixing brackets of the two brushing assemblies adjacent to both sides of the transfer coater, and installing one end of the brush head below the brush barrel, and at the same time connecting the liquid inlet end of the brush head with the liquid outlet end of the treatment liquid storage cavity, the treatment liquid in the treatment liquid storage cavity can always infiltrate the other end of the brush head, and evenly brush the surfaces of the two edges of the aluminum foil passing through the aluminum foil outlet end. The present utility model automatically brushes the surfaces of the two edges of the aluminum foil to increase the surface dyne value of the two edges of the aluminum foil, thereby preventing the problem of the aluminum foil thick edge caused by the flow of the negative electrode hard carbon slurry liquid, and effectively replacing the time-consuming and laborious coating method of manual operation.

[0053] The above embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A coating assembly for aluminum foil used in sodium-ion batteries, characterized in that, The invention comprises two painting assemblies, each of which comprises: A fixed bracket, wherein the fixed brackets of the two brushing assemblies are respectively arranged adjacent to two sides of the transfer coating machine; The liquid brush part includes a brush head and a brush barrel; the brush barrel is connected to the fixed bracket, the brush barrel is provided with a treatment liquid storage chamber, one end of the brush head is installed under the brush barrel, the liquid inlet end of the brush head is connected with the liquid outlet end of the treatment liquid storage chamber, and the other end of the brush head extends to the position corresponding to the aluminum foil discharge end of the transfer coating machine to brush the aluminum foil passing through the aluminum foil discharge end.

2. The coating assembly for aluminum foil used in a sodium-ion battery according to claim 1, characterized in that The fixed bracket includes a base, a first electromagnetic guide rail, a second electromagnetic guide rail and an electromagnetic slider; one end of the first electromagnetic guide rail is fixedly connected to the base, one end of the electromagnetic slider is slidably connected to the other end of the first electromagnetic guide rail, one end of the second electromagnetic guide rail is slidably connected to the other end of the electromagnetic slider, and a positioning sleeve is formed at the other end of the second electromagnetic guide rail, and the positioning sleeve is fixedly sleeved on the outer peripheral wall of the brush cylinder.

3. The coating assembly for aluminum foil used in sodium-ion batteries according to claim 2, wherein, An extension direction of the first electromagnetic guide rail and an extension direction of the second electromagnetic guide rail are arranged at a preset angle.

4. The coating assembly for aluminum foil used in sodium ion batteries according to claim 2, wherein, A limiting portion is formed at one end of the second electromagnetic guide rail, and a width of the limiting portion is greater than a width of the second electromagnetic guide rail.

5. The coating assembly for aluminum foil used in a sodium-ion battery according to claim 1, wherein An injection hole is formed at one end of the brush barrel away from the brush head, an inner peripheral wall of the injection hole is formed with an internal thread, and the injection hole is connected to the treatment liquid storage chamber; The liquid brushing part also includes a cylinder cover, one end of which is formed with an external thread matching the internal thread of the liquid injection hole so that the cylinder cover is threadedly connected to the brush cylinder, and the other end of the cylinder cover is formed with a twist ring portion.

6. The coating assembly for aluminum foil used in a sodium-ion battery according to claim 5, characterized in that, The brush barrel is cylindrical.

7. The coating assembly for aluminum foil used in a sodium-ion battery according to claim 5, wherein, The liquid brush part also includes a cover cap, which is disposed on the other end of the brush head and is buckled with the brush barrel.

8. The coating assembly for aluminum foil used in a sodium-ion battery according to claim 7, wherein, The brush barrel, the barrel cover and the cap are all integrally formed; and / or, The liquid brushing part is a plastic structural part.

9. The coating assembly for aluminum foil used in a sodium-ion battery according to claim 1, wherein The brush head is a sponge brush head or a polyester fiber brush head.

10. A coating device for aluminum foil used in sodium-ion batteries, characterized in that, It comprises a transfer coating machine and at least two coating assemblies for sodium ion battery aluminum foil according to any one of claims 1 to 9; the two coating assemblies are arranged in sequence along the direction of the aluminum foil being transported by the transfer coating machine.

Images