Glue spreader and diaphragm manufacturing system

Abstract

The utility model provides a glue spreader and a diaphragm manufacturing system, and belongs to the technical field of battery manufacturing. The gluing roller comprises a roller body and a heating unit, the roller body is provided with a first end and a second end which are oppositely distributed in the axial direction of the roller body, a plurality of through grooves which are distributed in the circumferential direction of the roller body at intervals and penetrate through the first end and the second end are formed in the surface of the roller body, and each through groove comprises a first section, a bent section and a second section which are sequentially communicated in the direction from the first end to the second end; the bent section is bent towards the first end; the heating unit is installed on the roller body and used for heating the surface of the roller body. The diaphragm prepared by the gluing roller can be fully infiltrated by an electrolyte, so that a polymer coating material in the diaphragm is fully swelled and softened, the binding power between a pole piece and the diaphragm is improved, and the electrical property of a corresponding battery is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a glue coating roller and a diaphragm manufacturing system. Background Art

[0002] In the prior art, for extra-large-sized batteries, the width dimension reaches 150-1550 mm, the length dimension reaches 100-1000 mm, and the thickness dimension reaches 8-26 mm. Since the dimensions of this type of battery are large in all dimensions, it is difficult to effectively transport the electrolyte to the internal area of ​​the diaphragm during injection, making it difficult for the electrode and the diaphragm to be fully infiltrated by the electrolyte. Accordingly, the polymer material in the diaphragm coating cannot fully swell and soften, resulting in a problem of weak adhesion between the electrode and the diaphragm in the battery, which in turn affects the electrical performance of the battery. Utility Model Content

[0003] The purpose of the present application is to provide a coating roller and a diaphragm manufacturing system, the diaphragm produced by which can be fully infiltrated by the electrolyte, so that the polymer coating material in the diaphragm is fully swollen and softened, so as to improve the bonding force between the electrode and the diaphragm, thereby improving the electrical performance of the corresponding battery.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a rubber coating roller, comprising a roller body and a heating unit. The roller body has a first end and a second end that are relatively distributed along the axial direction of the roller body, and a plurality of through grooves that are distributed along the circumference of the roller body and penetrate the first end and the second end are opened on the surface of the roller body, and along the direction from the first end to the second end, the through groove comprises a first section, a bending section, and a second section that are connected in sequence, and the bending section is bent toward the first end; the heating unit is installed on the roller body and is used to heat the surface of the roller body.

[0006] In the above technical solution, a plurality of through grooves are provided on the surface of the roller body, which are distributed at intervals and penetrate the first end and the second end, and the through grooves are arranged in a form in which the first section, the bending section and the second section are connected in sequence, wherein the bending section is bent toward the first end. With the help of the roller body in this specific form, the adhesive in the through grooves can be brought out by the base film under the action of the heating unit (the heating unit is installed on the roller body and used to heat the surface of the roller body, so that the adhesive close to the roller body gradually dries and sets, and the adhesive far from the roller body becomes a semi-solid with a certain bonding ability. When the surface of the base film is in contact with the adhesive in the coating roller, the adhesive is brought out by the base film. When the mixture comes into contact, the adhesive on the surface of the coating roller is brought out by the base film to form an electrolyte channel with a corresponding shape), thereby forming a plurality of channels of specific forms on the surface of the base film. When the electrolyte is injected into the battery, a "siphon effect" can be formed with the help of the channels of specific forms, thereby continuously transporting the injected electrolyte to the inside of the diaphragm, so that the battery diaphragm and the pole pieces in the corresponding area are fully infiltrated with the electrolyte, so that the polymer coating material in the diaphragm is fully swollen and softened, so as to improve the adhesion between the pole piece and the diaphragm, thereby improving the electrical performance of the corresponding battery.

[0007] In some optional embodiments, the size of the slot opening of the through slot in the circumferential direction of the roller body is defined as the slot width of the through slot; and the slot width of the first section gradually increases from the second end to the first end.

[0008] In the above technical solution, the groove width of the first section is set to gradually increase along the direction from the second end to the first end, so that the channel formed on the base membrane in the corresponding area is shaped like a trumpet. When the electrolyte is injected into the battery, more electrolyte can enter the channel, thereby improving the electrolyte transport efficiency, so that the electrolyte can more thoroughly infiltrate the diaphragm and the electrode.

[0009] In some optional embodiments, the bending section has a first bending section and a second bending section connected in sequence, the first bending section is connected to the first section and connected to form a bending section bending toward the second end, and the second bending section is connected to the second section and connected to form a bending section bending toward the first end.

[0010] In the above technical solution, the bending section includes a first bending section connected to the first section and bent toward the second end, and a second bending section connected to the second section and bent toward the first end, that is, the bending section as a whole presents an "S-shape", so that the channel formed on the base membrane also presents an "S-shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0011] In some optional embodiments, each through slot has two bending sections and two first sections, one end of each bending section away from the corresponding first section is connected and communicated with the second section, and the two bending sections are respectively located on both sides of the second section.

[0012] In the above technical solution, each channel has two first sections and two bent sections corresponding thereto, and the two bent sections are simultaneously connected to a second section and are located on both sides of the second section, that is, the bent section is "Y-shaped" as a whole, so that the channel formed on the base membrane also presents a "Y-shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0013] In some optional embodiments, the bending section has a third bending section, a fourth bending section and a fifth bending section that are connected in sequence, the third bending section is connected to the first section and connected to form a bending section that bends toward the second end, the fourth bending section bends in a direction between the first end and the second end, and the fifth bending section is connected to the second section and connected to form a bending section that bends toward the first end.

[0014] In the above technical solution, the bending section has three bending sections connected in sequence, wherein the third bending section is connected to the first section and bends toward the second end, the fourth bending section bends toward the direction between the first side and the second side, and the fifth bending section is connected to the second section and bends toward the first end, that is, the bending section as a whole presents an "Ω shape", so that the channel formed on the base membrane also presents an "Ω shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0015] In some optional embodiments, each through groove has two bending sections, two ends of each bending section are respectively connected to and communicate with the first section and the second section, and the two bending sections are respectively located on both sides of the second section.

[0016] In the above technical solution, each channel has two bending sections, which are respectively connected to the first section and the second section and are located on both sides of the second section, that is, the bending section is "Φ-shaped" as a whole, so that the channel formed on the base membrane also presents a "Φ-shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0017] In some optional embodiments, the extension direction of the first segment is from the first end to the second end, and / or the extension direction of the second segment is from the first end to the second end.

[0018] In the above technical solution, the first section and / or the second section is arranged to extend in the direction from the first end to the second end, that is, both sections are straight through grooves, which has the advantages of a relatively regular overall structure and convenient for transporting electrolyte.

[0019] In some optional embodiments, the groove widths of the bending section and the second section are 3 to 6 μm; and / or the depth of the through groove is 3 to 6 μm.

[0020] In the above technical solution, the groove widths of the bending section and the second end are limited within a specific range, which can provide a more suitable flow rate for electrolyte transportation. At the same time, the groove widths of the bending section and the second section are made closer, so that the specifications of most of the corresponding channels are more consistent, thereby facilitating industrial manufacturing; at the same time, the depth of the through groove is limited within a specific range, so that the outer wall of the corresponding channel has a more suitable thickness, thereby reducing the risk of channel collapse.

[0021] In some optional embodiments, the heating unit includes a resistance wire, and the resistance wire extends spirally along the axial direction of the roller body.

[0022] In the above technical solution, a resistance wire extending in a spiral along the axial direction of the roller body is provided in the heating unit, which has the advantage of high heating uniformity, so that the semi-cured adhesive coating formed after heating can be more easily separated from the surface of the roller body and transferred to the surface of the base film.

[0023] In the second aspect, an embodiment of the present application provides a diaphragm manufacturing system, which includes an inorganic coating coating mechanism, a glue layer coating mechanism and an adhesive coating coating mechanism distributed in sequence along the diaphragm conveying direction, and the glue layer coating mechanism includes a glue coating roller as provided in the embodiment of the first aspect.

[0024] In the above technical scheme, the diaphragm prepared by the diaphragm manufacturing system has a specific form of channel inside. Specifically, the diaphragm includes a base film, an inorganic coating, a glue layer and an adhesive coating which are stacked in sequence, and a specific form of channel is formed between the inorganic coating and the glue layer. When the electrolyte is injected into the battery, a "siphon effect" can be formed with the help of the specific form of channel, so that the injected electrolyte is continuously transported to the inside of the diaphragm, so that the battery diaphragm and the pole pieces in the corresponding area are fully infiltrated with the electrolyte, so that the polymer coating material in the diaphragm is fully swollen and softened, so as to improve the bonding force between the pole piece and the diaphragm, thereby improving the electrical performance of the corresponding battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the roller structure of a rubber coating roller provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 Schematic diagram of the first roller surface structure at A in FIG.

[0028] Figure 3 for Figure 1 Schematic diagram of the second roller surface structure at A in FIG.

[0029] Figure 4 for Figure 1 Schematic diagram of the third roller surface structure at A in FIG.

[0030] Figure 5 for Figure 1 Schematic diagram of the fourth roller surface structure at A in FIG.

[0031] Figure 6 A schematic diagram of the structure of a diaphragm manufacturing system provided in an embodiment of the present application;

[0032] Figure 7 A schematic cross-sectional view of a diaphragm provided in an embodiment of the present application.

[0033] Icon: 10-glue coating roller; 100-roller body; 110-first end; 120-second end; 130-through groove; 131-first section; 132-bending section; 1321-first bending section; 1322-second bending section; 1323-third bending section; 1324-fourth bending section; 1325-fifth bending section; 133-second section; 200-heating unit; 1-diaphragm manufacturing system; 1a-inorganic coating coating mechanism; 20-first guide roller; 30-coating roller; 40-coating tank; 50-second guide roller; 60-drying box; 1b-glue layer coating mechanism; 1c-bonding coating coating mechanism; 70-diaphragm; 71-base film; 72-inorganic coating; 73-glue layer; 73a-channel; 74-bonding coating. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] The following is a detailed description of the glue coating roller and diaphragm manufacturing system provided by the present application.

[0040] See also Figure 1 and Figure 2 In a first aspect, the embodiment of the present application provides a rubber coating roller 10, comprising a roller body 100 and a heating unit 200. The roller body 100 has a first end 110 and a second end 120 that are relatively distributed along the axial direction of the roller body 100. The surface of the roller body 100 is provided with a plurality of through grooves 130 that are distributed along the circumference of the roller body 100 and penetrate the first end 110 and the second end 120. In the direction from the first end 110 to the second end 120, the through groove 130 includes a first section 131, a bending section 132 and a second section 133 that are connected in sequence, and the bending section 132 is bent toward the first end 110; the heating unit 200 is installed on the roller body 100 and is used to heat the surface of the roller body 100.

[0041] In the present application, a plurality of through grooves 130 are provided on the surface of the roller body 100, which are distributed at intervals and penetrate the first end 110 and the second end 120, and the through grooves 130 are arranged in a form in which the first section 131, the bending section 132 and the second section 133 are connected in sequence, wherein the bending section 132 is bent toward the first end 110. With the help of the roller body 100 in this specific form, the adhesive in the through groove 130 can be brought out by the base film under the action of the heating unit 200 (the heating unit 200 is installed on the roller body 100 and is used to heat the surface of the roller body 100, so that the adhesive near the roller body 100 gradually dries and sets, and the adhesive far from the roller body 100 becomes A semi-solid with a certain bonding ability. When the surface of the base film contacts the adhesive in the glue coating roller 10, the adhesive on the surface of the glue coating roller 10 is brought out by the base film to form an electrolyte channel with a corresponding shape), thereby forming a plurality of channels of specific forms on the surface of the base film. When the electrolyte is injected into the battery, a "siphon effect" can be formed with the help of channels of specific forms, thereby continuously transporting the injected electrolyte to the inside of the diaphragm, so that the battery diaphragm and the pole pieces in the corresponding area are fully infiltrated with the electrolyte, so that the polymer coating material in the diaphragm is fully swollen and softened, so as to improve the bonding force between the pole pieces and the diaphragm, thereby improving the electrical performance of the corresponding battery.

[0042] See also Figure 2 As an example, the size of the slot opening of the through slot 130 in the circumferential direction of the roller body 100 is defined as the slot width of the through slot 130; along the direction from the second end 120 to the first end 110, the slot width of the first section 131 gradually increases.

[0043] In this embodiment, the groove width of the first section 131 is set to gradually increase along the direction from the second end 120 to the first end 110, so that the channel formed on the base membrane in the corresponding area is a trumpet-shaped channel. When the electrolyte is injected into the battery, more electrolyte can enter the channel, thereby improving the electrolyte transportation efficiency, so that the electrolyte can more thoroughly infiltrate the diaphragm and the electrode.

[0044] In other possible implementations, along the direction from the second end 120 to the first end 110 , the groove width of the first section 131 may also be in a consistent form (ie, the groove width is the same everywhere).

[0045] It should be noted that the form of the bending section 132 is not limited, as long as it can form a "siphon effect" to assist in electrolyte transportation.

[0046] See also Figure 2As an example, the bending section 132 has a first bending section 1321 and a second bending section 1322 connected in sequence, the first bending section 1321 is connected to the first section 131 and connected to form a bending section bending toward the second end 120, and the second bending section 1322 is connected to the second section 133 and connected to form a bending section bending toward the first end 110.

[0047] In this embodiment, the bending section 132 includes a first bending section 1321 connected to the first section 131 and bent toward the second end 120, and a second bending section 1322 connected to the second section 133 and bent toward the first end 110, that is, the bending section 132 is "S-shaped" as a whole, so that the channel formed on the base membrane also presents an "S-shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0048] See also Figure 3 As an example, each through slot 130 has two bending sections 132 and two first sections 131 , and one end of each bending section 132 away from the corresponding first section 131 is connected and communicated with the second section 133 , and the two bending sections 132 are respectively located on both sides of the second section 133 .

[0049] In this embodiment, each channel has two first sections 131 and two corresponding bending sections 132, and the two bending sections 132 are simultaneously connected to a second section 133 and are located on both sides of the second section 133, that is, the bending section 132 is "Y-shaped" as a whole, so that the channel formed on the base membrane is also "Y-shaped" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0050] See also Figure 4 As an example, the bending section 132 has a third bending section 1323, a fourth bending section 1324 and a fifth bending section 1325 which are connected in sequence. The third bending section 1323 is connected to the first section 131 and connected to form a bending section that bends toward the second end 120. The fourth bending section 1324 bends toward the direction between the first end 110 and the second end 120. The fifth bending section 1325 is connected to the second section 133 and connected to form a bending section that bends toward the first end 110.

[0051] In this embodiment, the bending section 132 has three bending sections connected in sequence, wherein the third bending section 1323 is connected to the first section 131 and bends toward the second end 120, the fourth bending section 1324 bends toward the direction between the first side and the second side, and the fifth bending section 1325 is connected to the second section 133 and bends toward the first end 110, that is, the bending section 132 is overall "Ω-shaped", so that the channel formed on the base membrane also presents an "Ω-shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0052] See also Figure 5 As an example, each through slot 130 has two bending sections 132 , and both ends of each bending section 132 are respectively connected to and communicate with the first section 131 and the second section 133 , and the two bending sections 132 are respectively located on both sides of the second section 133 .

[0053] In this embodiment, each channel has two bending sections 132, and the two bending sections 132 are respectively connected to the first section 131 and the second section 133 and are located on both sides of the second section 133, that is, the bending sections 132 are "Φ-shaped" as a whole, so that the channel formed on the base membrane also presents a "Φ-shape" as a whole in the corresponding area. With the help of a specific form of channel, the electrolyte can be effectively transported to the inside of the diaphragm.

[0054] It is understandable that the specific directions of the first section 131 and the second section 133 are not limited and can be adjusted according to actual needs.

[0055] As an example, the extension direction of the first section 131 is the direction from the first end 110 to the second end 120 , and / or the extension direction of the second section 133 is the direction from the first end 110 to the second end 120 .

[0056] In this embodiment, the first section 131 and / or the second section 133 are arranged to extend from the first end 110 to the second end 120, that is, both sections are straight through grooves 130, which has the advantages of a relatively regular overall structure and convenient transportation of electrolyte.

[0057] It can be understood that the electrolyte transport efficiency of the channel formed on the base membrane and the channel's own strength are closely related to the relevant dimensions of the channel, and the channel dimensions depend on the corresponding dimensions of the through groove 130. Based on this, the dimensions of the through groove 130 can be limited.

[0058] As an example, the groove width of the bending section 132 and the second section 133 is 3 to 6 μm, for example but not limited to the groove width being any point value of 3 μm, 4 μm, 5 μm and 6 μm or a range value between any two thereof; and / or, the depth of the through groove 130 is 3 to 6 μm, for example but not limited to the depth being any point value of 3 μm, 4 μm, 5 μm and 6 μm or a range value between any two thereof.

[0059] In this embodiment, the groove widths of the bending section 132 and the second end 120 are limited within a specific range, which can provide a more suitable flow rate for electrolyte transportation. At the same time, the groove widths of the bending section 132 and the second section 133 are made closer, so that the specifications of most of the corresponding channels are more consistent, thereby facilitating industrial manufacturing; at the same time, the depth of the through groove 130 is limited within a specific range, so that the outer wall of the corresponding channel has a more suitable thickness, thereby reducing the risk of channel collapse.

[0060] It should be noted that the installation position of the heating unit 200 is not limited, as long as the roller body 100 can be heated.

[0061] See also Figure 1 As an example, a channel extending along the axial direction of the roller body 100 and penetrating the first end 110 and the second end 120 is opened inside the roller body 100, and the heating unit 200 is installed in the channel.

[0062] As an example, the heating unit 200 includes a resistance wire, and the resistance wire extends spirally along the axial direction of the roller body 100 .

[0063] In this embodiment, the heating unit 200 is provided with a resistance wire extending in a spiral along the axial direction of the roller body 100, which has the advantage of high heating uniformity, so that the semi-cured adhesive coating formed after heating can be more easily separated from the surface of the roller body 100 and transferred to the surface of the base film.

[0064] See also Figure 6 In the second aspect, an embodiment of the present application provides a diaphragm manufacturing system 1, which includes an inorganic coating coating mechanism 1a, a glue layer coating mechanism 1b and an adhesive coating coating mechanism 1c distributed in sequence along the conveying direction of the diaphragm 70, and the glue layer coating mechanism 1b includes a glue coating roller 10 provided in the embodiment of the first aspect.

[0065] In the present application, the diaphragm prepared by the diaphragm manufacturing system 1 has a specific form of channel inside. Specifically, the diaphragm includes a base film, an inorganic coating, a rubber layer and an adhesive coating which are stacked in sequence, and a specific form of channel is formed between the inorganic coating and the rubber layer. When the electrolyte is injected into the battery, a "siphon effect" can be formed with the help of the specific form of channel, so that the injected electrolyte is continuously transported to the inside of the diaphragm 70, so that the battery diaphragm 70 and the pole pieces in the corresponding area are fully infiltrated with the electrolyte, so that the polymer coating material in the diaphragm is fully swollen and softened, so as to improve the bonding force between the pole piece and the diaphragm 70, thereby improving the electrical performance of the corresponding battery.

[0066] It should be noted that any structural or functional unit not specifically described or limited in the diaphragm manufacturing system 1 may be arranged according to conventional selections in the art.

[0067] As an example, along the conveying direction of the diaphragm 70, the inorganic coating coating mechanism 1a includes a first guide roller 20, a coating roller 30, a second guide roller 50 and a drying box 60, and a coating liquid tank 40 is also arranged under the coating roller 30, wherein the coating liquid tank 40 is used to contain the inorganic coating slurry.

[0068] As an example, along the conveying direction of the diaphragm 70, the glue coating mechanism 1b includes a first guide roller 20, a glue coating roller 10 and a second guide roller 50, and a coating tank 40 is further provided below the glue coating roller 10, wherein the coating tank 40 is used to contain adhesive slurry.

[0069] As an example, along the conveying direction of the diaphragm 70, the adhesive coating coating mechanism 1c includes a first guide roller 20, a coating roller 30 and a second guide roller 50, and a coating tank 40 is also provided below the coating roller 30, wherein the coating tank 40 is used to contain the adhesive coating slurry.

[0070] In order to better understand the technical solution, the specific preparation process of the diaphragm is combined here for auxiliary explanation.

[0071] When the diaphragm manufacturing system 1 is in operation, the base film is first pulled to the inorganic coating coating mechanism 1a, and the inorganic coating slurry (such as ceramic liquid) in the coating tank 40 is coated on the surface of the base film by the coating roller 30. Then, the base film coated with the inorganic coating slurry is pulled to the drying box 60 for drying.

[0072] The dried base film with the inorganic coating is then pulled to the glue layer coating mechanism 1b. As the glue coating roller 10 rotates, any type of adhesive in the coating tank 40 is brought into the non-through groove 130 area on the surface of the roller body 100 and the "S-shaped", "Ω-shaped", "Y-shaped" or "Φ-shaped" through groove 130 area on the surface. As the heating unit 200 continues to heat the roller body 100, the adhesive close to the roller body 100 gradually dries and takes shape, and the adhesive away from the roller body 100 becomes a semi-solid with a certain bonding ability. When the inorganic coating on the surface of the base film contacts the adhesive in the glue coating roller 10, the adhesive in the through groove 130 on the surface of the glue coating roller 10 is brought out by the inorganic coating to form a glue layer with a channel, so that the channel is located between the inorganic coating and the glue layer.

[0073] Subsequently, the substrate with channels on its surface is pulled to the adhesive coating coating mechanism 1c, and any type of adhesive in the coating tank 40 is coated on the substrate surface with channels by the coating roller 30 to form an adhesive coating to reinforce the channels.

[0074] In order to better understand the technical solution, a cross-sectional schematic diagram of the diaphragm is used here for auxiliary explanation.

[0075] See also Figure 7As an example, along the thickness direction of the diaphragm 70 , the diaphragm 70 includes a base film 71 , an inorganic coating 72 , a glue layer 73 and a bonding coating 74 which are stacked in sequence, wherein a channel 73 a exists between the inorganic coating 72 and the glue layer 73 .

[0076] In other possible implementations, it is also possible to choose not to provide the bonding coating 74 .

[0077] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A glue coating roller, characterized in that: include: A roller body, the roller body having a first end and a second end oppositely distributed along the axial direction of the roller body, a surface of the roller body having a plurality of through grooves distributed at intervals along the circumference of the roller body and penetrating the first end and the second end, and along the direction from the first end to the second end, the through groove comprises a first section, a bent section and a second section connected in sequence, and the bent section bends toward the first end; A heating unit is installed on the roller body and is used to heat the surface of the roller body.

2. The glue coating roller according to claim 1, characterized in that: The dimension of the slot opening of the through slot in the circumferential direction of the roller body is defined as the slot width of the through slot; along the direction from the second end to the first end, the slot width of the first section gradually increases.

3. The glue coating roller according to claim 2, characterized in that: The bending section has a first bending section and a second bending section connected in sequence, the first bending section is connected to the first section and connected to form a bending section bending toward the second end, and the second bending section is connected to the second section and connected to form a bending section bending toward the first end.

4. The glue coating roller according to claim 3, characterized in that: Each of the through slots has two bending sections and two first sections, one end of each bending section away from the corresponding first section is connected to and communicates with the second section, and the two bending sections are respectively located on both sides of the second section.

5. The glue coating roller according to claim 2, characterized in that: The bending section has a third bending section, a fourth bending section and a fifth bending section which are connected in sequence, the third bending section is connected to the first section and connected to form a bending section which bends toward the second end, the fourth bending section bends toward the direction between the first end and the second end, and the fifth bending section is connected to the second section and connected to form a bending section which bends toward the first end.

6. The glue coating roller according to claim 5, characterized in that: Each of the through slots has two bending sections, two ends of each of the bending sections are respectively connected to and communicate with the first section and the second section, and the two bending sections are respectively located on both sides of the second section.

7. The glue coating roller according to any one of claims 1 to 6, characterized in that: The first section extends in a direction from the first end to the second end, and / or the second section extends in a direction from the first end to the second end.

8. The glue coating roller according to any one of claims 2 to 6, characterized in that: The groove width of the bending section and the second section is 3 to 6 μm; and / or the depth of the through groove is 3 to 6 μm.

9. The glue coating roller according to any one of claims 1 to 6, characterized in that: The heating unit includes a resistance wire, and the resistance wire spirally extends along the axial direction of the roller body.

10. A diaphragm manufacturing system, characterized in that: Along the membrane conveying direction, it includes an inorganic coating coating mechanism, a glue layer coating mechanism and an adhesive coating coating mechanism which are sequentially spaced apart, and the glue layer coating mechanism includes a glue coating roller as claimed in any one of claims 1 to 9.

Images