Via roller, coating machine drying box and coating machine drying system

Abstract

The embodiment of the utility model provides a passing roller, a coating machine drying box and a coating machine drying system, and relates to the technical field of battery pole piece processing. The passing roller comprises a passing roller body and a heat insulation sleeve, the passing roller body is wrapped by the heat insulation sleeve, and the heat insulation sleeve is used for insulating the temperature of the passing roller body so as to prevent heat of the passing roller body from being transmitted to a pole piece. By wrapping the heat insulation sleeve outside the passing roller body, the pole piece can be prevented from being in direct contact with the passing roller, and the heat insulation sleeve has a heat insulation effect and can prevent heat of the passing roller body from being transferred to the pole piece, so that uneven heating of the pole piece is prevented, and dark marks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece processing, in particular to a roller, a coating machine drying box and a coating machine drying system. Background Art

[0002] Battery pole pieces refer to the positive and negative pole pieces in the battery. They are one of the most critical parts of the battery and have the functions of conductivity, insulation, anti-lateral flow, reducing battery pack capacity loss and improving battery safety performance. The manufacturing process of battery pole pieces can be divided into slurry preparation, slurry coating, pole piece rolling, slicing, drying and other processes. The drying process is to evaporate the water inside the battery pole piece to a certain degree of dryness, so as to effectively ensure the quality of the battery pole piece and improve the service life and performance of the battery.

[0003] However, the coating machine drying box often uses rollers to transport the electrode. Since the roller is located in the drying box and the roller is in the drying box for a long time, the roller temperature will rise. When the electrode is dried in the drying box through the roller, the electrode will be heated unevenly, resulting in the electrode not being dried synchronously when passing through the drying box roller, and dark marks may appear on the surface of the electrode. Utility Model Content

[0004] The utility model provides a roller, a coating machine drying box and a coating machine drying system, which can prevent the temperature of the roller from being transferred to the pole piece, so as to reduce dark marks on the surface of the pole piece.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The embodiment of the utility model provides a roller, which comprises:

[0007] Roller body;

[0008] A heat-insulating sleeve wraps the roller body and is used to isolate the temperature of the roller body to prevent the heat of the roller body from being transferred to the pole piece.

[0009] In an optional embodiment, the thermal insulation sleeve is provided with at least one heat dissipation hole.

[0010] In an optional embodiment, the area of ​​the heat dissipation hole is less than or equal to 4 mm 2 .

[0011] In an optional embodiment, the thermal insulation sleeve is in the shape of a net rope.

[0012] In an optional embodiment, the roller body includes a conveying roller and two roller shafts, both of which are connected to the conveying roller, and the two roller shafts are respectively located at both ends of the conveying roller; the roller shaft is used to connect to an external driving member to drive the conveying roller to rotate; the insulation sleeve wraps the conveying roller and the two roller shafts.

[0013] In an optional embodiment, the thickness of the thermal insulation sleeve is 1 to 3 mm.

[0014] In an optional embodiment, the heat insulation sleeve is made of a material that is resistant to high temperatures above 200° C. and corrosion.

[0015] An embodiment of the utility model also provides a coating machine drying box, comprising a box body, a drying tunnel and a plurality of rollers as described in any of the above embodiments, wherein the drying tunnel and the plurality of rollers are both located in the box body, and the drying tunnel is used to dry the electrode pieces passing through; the plurality of rollers are arranged side by side along the drying tunnel, and the plurality of rollers are all used to convey the electrode pieces through the drying tunnel.

[0016] In an optional embodiment, the coating machine drying box includes an upper heating component and a lower heating component, and the upper heating component and the lower heating component are respectively arranged on the upper and lower sides of the interior of the box to form the drying tunnel.

[0017] An embodiment of the utility model further provides a coating machine drying system, comprising an air heat exchanger and a coating machine drying box as described in any one of the above embodiments, wherein the air heat exchanger is communicated with the drying tunnel.

[0018] The beneficial effects of a roller, a coating machine drying box and a coating machine drying system of the embodiment of the utility model include:

[0019] The roller includes a roller body and a heat-insulating sleeve, wherein the heat-insulating sleeve wraps the roller body, and the heat-insulating sleeve is used to isolate the temperature of the roller body to prevent the heat of the roller body from being transferred to the pole piece. By wrapping the heat-insulating sleeve outside the roller body, the pole piece can be prevented from directly contacting the roller, and the heat-insulating sleeve has a heat-insulating effect, which can prevent the heat of the roller body from being transferred to the pole piece, thereby preventing the pole piece from being heated unevenly and reducing the generation of dark marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, 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 utility model 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.

[0021] Figure 1A schematic diagram of a roller provided in an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of a pole piece provided in an embodiment of the present utility model being located on a roller.

[0023] Icon: 100-roller; 110-roller body; 111-conveying roller; 112-roller shaft; 120-insulation sleeve; 121-heat dissipation hole; 200-pole piece. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] 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.

[0027] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model 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. Therefore, it cannot be understood as a limitation on the present utility model.

[0028] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0029] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0030] Battery pole pieces refer to the positive and negative pole pieces in the battery. They are one of the most critical parts of the battery and have the functions of conductivity, insulation, anti-lateral flow, reducing battery pack capacity loss and improving battery safety performance. The manufacturing process of battery pole pieces can be divided into slurry preparation, slurry coating, pole piece rolling, slicing, drying and other processes. The drying process is to evaporate the water inside the battery pole piece to a certain degree of dryness, so as to effectively ensure the quality of the battery pole piece and improve the service life and performance of the battery. However, rollers are often used to convey pole pieces in the coating machine drying box. Since the roller is located in the drying box and the roller is in the drying box for a long time, the temperature of the roller will increase. When the pole piece is dried in the drying box through the roller transmission, the pole piece will be heated unevenly, resulting in the pole piece 200 not being able to be dried synchronously when passing through the oven roller, and dark marks may appear on the surface of the pole piece.

[0031] Based on this, see Figure 1 and Figure 2 The roller 100 provided in the embodiment of the utility model can effectively improve the above-mentioned technical problems. The roller 100 can prevent the temperature of the roller 100 from being transferred to the pole piece 200, so as to reduce the dark marks on the surface of the pole piece 200. The roller 100 is applied to the coating machine drying box and the coating machine drying system. The coating machine drying box and the coating machine drying system having the roller 100 have the same function.

[0032] The coating machine drying system in this embodiment includes an air heat exchanger and a coating machine drying box, and the air heat exchanger is connected to a drying channel in the coating machine drying box. The air heat exchanger can perform heat exchange with the drying channel in the coating machine drying box to keep the temperature in the drying channel within a certain range to improve the drying effect.

[0033] In detail, the coating machine drying box in this embodiment includes a box body, a drying tunnel and a plurality of rollers 100, both of which are located in the box body, and the drying tunnel is used to dry the pole piece 200 passing through; the plurality of rollers 100 are arranged side by side along the drying tunnel, and the plurality of rollers 100 are used to convey the pole piece 200 through the drying tunnel. Specifically, the coating machine drying box includes an upper heating assembly and a lower heating assembly, which are respectively arranged on the upper and lower sides of the box body to form a drying tunnel.

[0034] The upper heating assembly includes an upper fan, an upper heating box and a first condenser. The upper fan is connected to the inlet of the upper heating box, the outlet of the upper heating box is connected to the drying tunnel, and the first condenser is arranged in the upper heating box. The lower heating assembly includes a lower fan, a lower heating box and a second condenser. The lower fan is connected to the inlet of the lower heating box, the outlet of the lower heating box is connected to the drying tunnel, and the second condenser is arranged in the lower heating box. Both the upper fan and the lower fan are connected to the air heat exchanger. The fan draws air into the upper heating box and / or the lower heating box. After being processed by the first condenser and / or the second condenser, the upper and lower heating boxes transport the air heated to a specified temperature to the drying tunnel to dry the electrode 200.

[0035] In addition, the coating machine drying box may also be provided with a plurality of air nozzles, which are respectively provided on the upper and lower sides of the drying tunnel, and air of a certain temperature is blown to the electrode 200 through the air nozzles to achieve the purpose of drying the electrode 200. Of course, the drying tunnel may also be formed by other drying devices, as long as the electrode 200 can be dried when passing through the drying tunnel, and the specific drying device used is not limited here.

[0036] The specific structure of the roller 100 will be described in detail below.

[0037] Figure 1 A schematic diagram of a roller 100 provided in an embodiment of the utility model; Figure 2 This is a schematic diagram of the pole piece 200 provided in the embodiment of the utility model being located on the roller 100, as shown Figure 1 and Figure 2 As shown, in order to prevent the pole piece 200 from being heated unevenly and generating dark marks, the roller 100 provided in this embodiment includes a roller body 110 and a heat insulation sleeve 120, and the heat insulation sleeve 120 wraps the roller body 110. The heat insulation sleeve 120 is used to isolate the temperature of the roller body 110 to prevent the heat of the roller body 110 from being transferred to the pole piece 200. By wrapping the heat insulation sleeve 120 outside the roller body 110, the pole piece 200 can be prevented from directly contacting the roller 100, and the heat insulation sleeve 120 has a heat insulation effect, which can prevent the heat of the roller body 110 from being transferred to the pole piece 200, thereby preventing the pole piece 200 from being heated unevenly and reducing the generation of dark marks.

[0038] See also Figure 1The roller body 110 in this embodiment includes a conveying roller 111 and two roller shafts 112. Both roller shafts 112 are connected to the conveying roller 111, and the two roller shafts 112 are respectively located at the two ends of the conveying roller 111; the roller shaft 112 is used to connect with an external driving member to drive the conveying roller 111 to rotate; the heat insulation sleeve 120 wraps the conveying roller 111 and the two roller shafts 112. That is, the heat insulation sleeve 120 wraps the entire roller body 110 to prevent the heat of the roller body 110 from being transferred to the pole piece 200, so that the pole piece 200 is heated unevenly and dark marks appear. Because the roller shaft 112 will be connected to an external driving member, such as a driving motor, the pole piece 200 will only contact the conveying roller 111, so the heat insulation sleeve 120 can also only wrap the conveying roller 111. The heat insulation sleeve 120 can be connected to the roller 100 in a sleeved manner. Of course, a heat insulation layer can also be coated on the surface of the roller body 110 to be used as the heat insulation sleeve 120. As long as a heat insulating sleeve 120 can be added outside the roller body 110 to prevent the roller body 110 from directly contacting the pole piece 200 and transfer heat to the pole piece 200, the specific connection method between the heat insulating sleeve 120 and the roller body 110 is not limited here.

[0039] In order to prevent the heat insulation sleeve 120 from affecting the normal rotation of the roller body 110, the thickness of the heat insulation sleeve 120 in this embodiment is 1 to 3 mm. Specifically, the thickness of the heat insulation sleeve 120 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. Of course, the thickness of the heat insulation sleeve 120 can also be any value between 1 and 3 mm, which is not limited here. In addition, when the heat insulation sleeve 120 is only wrapped around the conveying roller 111, the thickness of the heat insulation sleeve 120 is not limited to between 1 and 3 mm, and the thickness of the heat insulation sleeve 120 can be increased.

[0040] In order to prevent the high temperature of the roller 100 from being transmitted to the pole piece 200, and to ensure that the roller 100 has good heat dissipation performance, please refer to Figure 1 and Figure 2 In this embodiment, the heat insulating sleeve 120 is provided with at least one heat dissipation hole 121. The heat dissipation hole 121 can accelerate the heat dissipation and prevent the roller 100 from being damaged due to overheating. The heat dissipation hole 121 can be a regular shape, such as a circle, a square, a diamond, etc. The heat dissipation hole 121 can also be an irregular shape, such as an irregular pentagon, a concave quadrilateral, etc. The specific shape of the heat dissipation hole 121 is not limited here.

[0041] Specifically, the number of the heat dissipation holes 121 in this embodiment is multiple. The multiple heat dissipation holes 121 are arranged at intervals. The multiple heat dissipation holes 121 can be evenly distributed on the heat insulation sleeve 120, and the multiple heat dissipation holes 121 can also be located at various positions of the heat insulation sleeve 120 and arranged unevenly. The opening position and number of the heat dissipation holes 121 are determined according to actual needs and are not limited here.

[0042] In order to ensure that the roller 100 has a heat dissipation effect while not affecting the normal heat insulation function of the heat insulation sleeve 120 and preventing the temperature of the roller 100 from being transferred to the pole piece 200, the area of ​​the heat dissipation hole 121 in this embodiment is less than or equal to 4mm 2 Specifically, the area of ​​the heat dissipation hole 121 can be 4 mm 2 , 3mm 2 As long as it is less than or equal to 4mm 2 The specific value is not limited here.

[0043] In order to achieve rapid heat dissipation of the roller body 110 to a greater extent, the heat insulation sleeve 120 in this embodiment is in the shape of a net rope. That is, the hollow part of the heat insulation sleeve 120 is a heat dissipation hole 121, and the heat dissipation holes 121 are evenly distributed on the heat insulation sleeve 120 at a certain distance. Of course, the heat insulation sleeve 120 can also be designed in other shapes, which are not limited here.

[0044] In order to ensure that the heat insulating sleeve 120 has a long service life in the coating machine drying box, the heat insulating sleeve 120 in this embodiment is made of a material that is resistant to high temperatures above 200°C and corrosion. For example, it is made of polyimide, polyphenylene sulfide, etc. The specific high temperature and corrosion resistant material to be used is determined according to actual production needs and production costs, and is not limited here.

[0045] According to a roller 100 provided in this embodiment, its working principle is as follows:

[0046] The roller 100 with the heat insulating sleeve 120 is installed in the coating machine drying box, and the pole piece 200 is placed on the roller 100. The pole piece 200 contacts the heat insulating sleeve 120 of the roller 100 to prevent the temperature of the roller body 110 from being transferred to the pole piece 200, causing dark marks on the pole piece 200. The roller 100 with the heat insulating sleeve 120 drives the pole piece 200 to pass through the drying channel of the coating machine drying box to dry the pole piece 200.

[0047] In summary, the roller 100 includes a roller body 110 and a heat-insulating sleeve 120, wherein the heat-insulating sleeve 120 wraps the roller body 110, and the heat-insulating sleeve 120 is used to isolate the temperature of the roller body 110 to prevent the heat of the roller body 110 from being transferred to the pole piece 200. By wrapping the heat-insulating sleeve 120 outside the roller body 110, the pole piece 200 can be prevented from directly contacting the roller 100, and the heat-insulating sleeve 120 has a heat-insulating effect, which can prevent the heat of the roller body 110 from being transferred to the pole piece 200, thereby preventing the pole piece 200 from being heated unevenly, so as to reduce the generation of dark marks.

[0048] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A roller, characterized in that: include: Roller body (110); A heat insulating sleeve (120), wherein the heat insulating sleeve (120) wraps the roller body (110), and the heat insulating sleeve (120) is used to isolate the temperature of the roller body (110) to prevent the heat of the roller body (110) from being transferred to the pole piece (200).

2. The roller according to claim 1, characterized in that: The heat insulation sleeve (120) is provided with at least one heat dissipation hole (121).

3. The roller according to claim 2, characterized in that: The area of ​​the heat dissipation hole (121) is less than or equal to 4 mm 2 .

4. The roller according to claim 2, characterized in that: The heat insulation sleeve (120) is in the shape of a net rope.

5. The roller according to claim 1, characterized in that: The roller body (110) comprises a conveying roller (111) and two roller shafts (112), the two roller shafts (112) are connected to the conveying roller (111), and the two roller shafts (112) are respectively located at two ends of the conveying roller (111); the roller shaft (112) is used to connect to an external driving component to drive the conveying roller (111) to rotate; the heat insulation sleeve (120) wraps the conveying roller (111) and the two roller shafts (112).

6. The roller according to claim 1, characterized in that: The thickness of the heat insulation sleeve (120) is 1 to 3 mm.

7. The roller according to claim 1, characterized in that: The heat insulation sleeve (120) is made of a material that is resistant to high temperatures above 200° C. and corrosion.

8. A coating machine drying box, characterized in that: It comprises a box body, a drying tunnel and a plurality of rollers (100) as claimed in any one of claims 1 to 7, wherein the drying tunnel and the plurality of rollers (100) are both located in the box body, and the drying tunnel is used for drying the pole pieces (200) passing through the drying tunnel; the plurality of rollers (100) are arranged side by side along the drying tunnel, and the plurality of rollers (100) are all used for conveying the pole pieces (200) passing through the drying tunnel.

9. The coating machine drying box according to claim 8, characterized in that: The coating machine drying box comprises an upper heating component and a lower heating component, and the upper heating component and the lower heating component are respectively arranged at the upper and lower sides of the box body to form the drying tunnel.

10. A coating machine drying system, characterized in that: It comprises an air heat exchanger and a coating machine drying box as claimed in claim 8 or claim 9, wherein the air heat exchanger is connected to the drying tunnel.

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