Production device for lithium-supplementing carbon-coated aluminum foil

Abstract

The utility model provides a production device for lithium-supplementing carbon-coated aluminum foil, which relates to the technical field of lithium batteries and comprises a gas box, and a collecting roller is arranged in the gas box. The aluminum foil extends into the gas box and is wound on the collecting roller; a gas inlet pipeline is arranged at the lower end of the gas box and is used for being connected with a gas supply system; a spraying device and a hot air drying device are arranged in the gas box, and the aluminum foil sequentially passes through the spraying device and the hot air drying device and then is wound on the collecting roller. According to the production device for the lithium-supplementing carbon-coated aluminum foil, a gas inlet pipeline of a gas box is connected with a gas supply system, and the gas supply system supplies nitrogen into the gas box; the gas outlet pipeline is arranged above the gas box, and after nitrogen enters the gas box, gas in the gas box is extruded out of the gas box; therefore, air in the gas box is exhausted, and the lithium supplementing material is prevented from being in contact with high-temperature air in the gas box to cause inactivation.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a production device for lithium-supplemented carbon-coated aluminum foil. Background Art

[0002] Aluminum foil is widely used as a current collector in positive electrodes such as LiCoO2, ternary materials and LiFePO4.

[0003] The existing production process schemes and production equipment of carbon-coated aluminum foil lack environmental control capabilities, and generally adopt roller coating, transfer coating and other methods to prepare the carbon coating layer. During the roller coating and transfer coating process, the slurry generally needs to be exposed, with a large contact area and long contact time with the surrounding environment. There are many problems in producing aluminum foil materials with lithium-replenished carbon coating layers using the existing process technology schemes: (1) The lithium-replenishing material is easily deactivated due to contact with moisture in the air. (2) The existing technology process generally uses a tunnel furnace to carry out the solvent evaporation process of the slurry. In the tunnel furnace, the lithium-replenishing material is in direct contact with high-temperature air, which will accelerate its deactivation reaction process. (3) The existing technology scheme roller coating and transfer coating scheme is a single-sided coating scheme. After the A side is sprayed, it enters the tunnel furnace for drying, and then the B side is sprayed and dried. This type of technical scheme prolongs the residence time of the lithium-replenishing material in the air and increases the risk of deactivation of the lithium-replenishing material. Utility Model Content

[0004] The purpose of the utility model is to provide a production device for lithium-supplemented carbon-coated aluminum foil to solve the technical problem that lithium-supplemented materials are easily deactivated due to contact with moisture in the air.

[0005] The utility model provides a production device for lithium-supplemented carbon-coated aluminum foil, comprising a gas box, wherein a collecting roller is arranged in the gas box; the aluminum foil extends into the gas box and is rolled up on the collecting roller;

[0006] An air outlet pipe is provided at the upper end of the gas box, and an air inlet pipe is provided at the lower end of the gas box, and the air inlet pipe is used to be connected to the air supply system;

[0007] A spraying device and a hot air drying device are arranged in the gas box. The aluminum foil passes through the spraying device and the hot air drying device in sequence and is then rolled up on the collecting roller.

[0008] In an optional embodiment, it further comprises an outer conveying assembly and an inner conveying assembly, wherein the inner conveying assembly is arranged inside the gas box; and the outer conveying assembly is arranged outside the gas box;

[0009] The aluminum foil passes through the outer conveying assembly and enters the gas box and is wound onto the collecting roller after passing through the inner conveying assembly.

[0010] In an optional embodiment, the spraying device includes two spraying nozzles, the two spraying nozzles are arranged opposite to each other, and the aluminum foil passes between the two spraying nozzles.

[0011] In an optional embodiment, the hot air drying device includes two hot air drying components, the two hot air drying components are symmetrically arranged, and the aluminum foil passes between the two hot air drying components.

[0012] In an optional embodiment, the inner conveying assembly includes a first conveying roller, a second conveying roller, a third conveying roller and a fourth conveying roller; the first conveying roller and the fourth conveying roller are arranged on the same horizontal plane;

[0013] A second conveying roller is provided at the lower end of the first conveying roller, a third conveying roller is provided at the lower end of the fourth conveying roller, and the second conveying roller and the third conveying roller are provided at the same horizontal plane.

[0014] In an optional embodiment, the outer conveying assembly includes a sixth conveying roller, a seventh conveying roller, an eighth conveying roller, and a ninth conveying roller; the sixth conveying roller and the ninth conveying roller are arranged on the same horizontal plane;

[0015] A seventh conveying roller is provided at the lower end of the sixth conveying roller, an eighth conveying roller is provided at the lower end of the ninth conveying roller, and the seventh conveying roller and the eighth conveying roller are provided on the same horizontal plane;

[0016] The ninth conveying roller and the first conveying roller are arranged on the same horizontal plane.

[0017] In an optional embodiment, the spraying device and the hot air drying device are arranged between the first conveying roller and the second conveying roller.

[0018] In an optional embodiment, an air outlet valve is provided on the air outlet pipe, and an air inlet valve is provided on the air inlet pipe.

[0019] The gas box of the lithium-replenished carbon-coated aluminum foil production device provided by the utility model has an air inlet pipe connected to the air supply system, and the air supply system supplies nitrogen into the gas box; the air outlet pipe is arranged above the gas box, and after the nitrogen enters the gas box, it squeezes the gas in the gas box out of the gas box; in this way, the air in the gas box is discharged, and the lithium-replenishing material is prevented from coming into contact with high-temperature air in the gas box and being deactivated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A production device for lithium-supplemented carbon-coated aluminum foil is provided in an embodiment of the utility model.

[0022] Icons: 100-aluminum foil; 200-gas box; 300-air inlet pipe; 301-air inlet valve; 400-air outlet pipe; 401-air outlet valve; 500-sixth conveyor roller; 600-seventh conveyor roller; 700-eighth conveyor roller; 800-ninth conveyor roller; 900-first conveyor roller; 110-second conveyor roller; 120-third conveyor roller; 130-fourth conveyor roller; 140-collecting roller; 150-spraying device; 160-hot air drying device; 170-hot air drying assembly; 180-spraying nozzle. DETAILED DESCRIPTION

[0023] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] In the description of this application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0026] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connected" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two elements.

[0027] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings.

[0028] Example

[0029] Reference Figure 1 The present invention provides a production device for lithium-supplemented carbon-coated aluminum foil, comprising a gas box 200, wherein a collecting roller 140 is provided in the gas box 200; an aluminum foil 100 extends into the gas box 200 and is wound on the collecting roller 140;

[0030] An air outlet pipe 400 is provided at the upper end of the gas box 200, and an air inlet pipe 300 is provided at the lower end of the gas box 200. The air inlet pipe 300 is used to connect to the gas supply system;

[0031] A spraying device 150 and a hot air drying device 160 are provided in the gas box 200 . The aluminum foil 100 passes through the spraying device 150 and the hot air drying device 160 in sequence and is then wound onto the collecting roller 140 .

[0032] In some embodiments, an outlet pipe is provided at the upper end of the gas box 200 of the production device for lithium-replenished carbon-coated aluminum foil, and an air inlet pipe 300 is provided at the lower end of the gas box 200; the air supply system is connected to the air inlet pipe 300, and the air supply system is generally a nitrogen system. The air supply system is used to supply nitrogen to the air inlet pipe 300, and the nitrogen enters the gas box 200. The nitrogen is used to replace the air in the gas box 200. Generally, the nitrogen is supplied for 0.5-2 hours. After the air in the gas box is fully replaced, lithium-replenished carbon coating is performed. This can reduce the air humidity in the gas box 200, so that the lithium-replenishing material can isolate water vapor during the spraying process, thereby improving the stability of the lithium-replenishing material.

[0033] In an optional embodiment, it further includes an external transmission component and an internal transmission component, wherein the internal transmission component is disposed inside the gas box 200; and the external transmission component is disposed outside the gas box 200;

[0034] The aluminum foil 100 passes through the outer conveying assembly and enters the gas box 200 , and is then wound onto the collecting roller 140 after passing through the inner conveying assembly.

[0035] In an optional embodiment, the spraying device 150 includes two spraying nozzles 180 , the two spraying nozzles 180 are arranged opposite to each other, and the aluminum foil 100 passes between the two spraying nozzles 180 .

[0036] In an optional embodiment, the hot air drying device 160 includes two hot air drying components 170 , and the two hot air drying components 170 are symmetrically arranged, and the aluminum foil 100 passes between the two hot air drying components 170 .

[0037] An inlet for the aluminum foil 100 is provided on the gas box 200, an external conveying assembly is provided outside the gas box 200, and an internal conveying assembly is provided inside the gas box 200. The external conveying assembly and the internal conveying assembly cooperate to allow the aluminum foil 100 to enter from the inlet; precise conveyance of the aluminum foil 100 can reduce the size of the inlet, reduce nitrogen overflow, and reduce the amount of nitrogen used.

[0038] In order to improve spraying efficiency, shorten production time, and reduce the risk of exposure to lithium-supplementing materials and moisture, the spraying device 150 has two spray nozzles 180, and the two spray nozzles 180 are correspondingly arranged; the aluminum foil 100 to be sprayed passes between the two spray nozzles 180, and the two spray nozzles 180 simultaneously spray the two large surfaces of the aluminum foil 100; this solves the problem of traditional extrusion coating and transfer coating requiring distributed coating on side A and side B, simplifies the production process, shortens production time, and reduces the risk of exposure to lithium-supplementing materials and moisture.

[0039] In order to improve the drying efficiency, two hot air drying components 170 are set accordingly. The aluminum foil 100 passes between the two hot air drying components 170. The hot air drying components 170 dry the slurry on the aluminum foil 100, solving the problem of slow drying speed and easy exposure to air during the drying process in traditional tunnel furnaces.

[0040] The hot air drying device 160 includes a drying box body, in which two hot air drying components 170 are correspondingly arranged; the two hot air drying components 170 blow hot air to both sides of the aluminum foil 100 at the same time, thereby effectively improving the drying efficiency of the slurry on the aluminum foil 100.

[0041] In an optional embodiment, the inner conveying assembly includes a first conveying roller 900, a second conveying roller 110, a third conveying roller 120 and a fourth conveying roller 130; the first conveying roller 900 and the fourth conveying roller 130 are arranged on the same horizontal plane;

[0042] A second conveying roller 110 is provided at a lower end of the first conveying roller 900 , a third conveying roller 120 is provided at a lower end of the fourth conveying roller 130 , and the second conveying roller 110 and the third conveying roller 120 are provided at the same horizontal plane.

[0043] In an optional embodiment, the outer conveying assembly includes a sixth conveying roller 500, a seventh conveying roller 600, an eighth conveying roller 700 and a ninth conveying roller 800; the sixth conveying roller 500 and the ninth conveying roller 800 are arranged on the same horizontal plane;

[0044] A seventh conveying roller 600 is provided at the lower end of the sixth conveying roller 500 , and an eighth conveying roller 700 is provided at the lower end of the ninth conveying roller 800 , and the seventh conveying roller 600 and the eighth conveying roller 700 are provided on the same horizontal plane;

[0045] The ninth conveying roller 800 and the first conveying roller 900 are arranged on the same horizontal plane.

[0046] The ninth conveyor roller 800 and the first conveyor roller 900 are arranged on the same horizontal plane, the first conveyor roller 900 is arranged inside the gas box 200, and the ninth conveyor roller 800 is arranged outside the gas box 200. The first conveyor roller 900 and the ninth conveyor roller 800 cooperate to allow the aluminum foil 100 to accurately enter from the entrance on the gas box 200.

[0047] In an optional embodiment, the spraying device 150 and the hot air drying device 160 are disposed between the first conveying roller 900 and the second conveying roller 110 .

[0048] The aluminum foil 100 moves toward the second conveying roller 110 after passing through the first conveying roller 900 . The spraying device 150 is disposed at the upper end of the hot air drying device 160 . The aluminum foil 100 enters the hot air drying device 160 after passing through the spraying device 150 .

[0049] In an optional embodiment, an air outlet valve 401 is provided on the air outlet pipe 400 , and an air inlet valve 301 is provided on the air inlet pipe 300 .

[0050] In some embodiments, an outlet pipe 400 is provided at the upper end of the gas box 200, and an inlet pipe 300 is provided at the lower end of the gas box 200; an outlet valve 401 is provided on the outlet pipe 400, and an inlet valve 301 is provided on the inlet pipe 300; the inlet pipe 300 is connected to the gas supply system, and nitrogen enters the gas box 200 from the inlet pipe 300 and squeezes the air in the gas box 200 out of the gas box 200; the air in the gas box 200 is discharged from the outlet pipe 400; when the inlet pipe 300 and the outlet pipe 400 are not in use, the inlet valve 301 of the inlet pipe 300 is closed, and the outlet valve 401 of the outlet pipe 400 is closed.

[0051] The gas box 200 of the lithium-replenished carbon-coated aluminum foil production device provided by the present invention has an air inlet pipe 300 connected to the air supply system, and the air supply system supplies nitrogen into the gas box 200; the air outlet pipe 400 is arranged above the gas box 200, and after the nitrogen enters the gas box 200, it squeezes the gas in the gas box 200 out of the gas box 200; in this way, the air in the gas box 200 is discharged, preventing the lithium-replenishing material from coming into contact with high-temperature air in the gas box 200 and causing deactivation.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A production device for lithium-supplemented carbon-coated aluminum foil, characterized in that: The invention comprises a gas box (200), wherein a collecting roller (140) is arranged in the gas box (200); an aluminum foil (100) extends into the gas box (200) and is rolled up on the collecting roller (140); An air outlet pipe (400) is provided at the upper end of the gas box (200), and an air inlet pipe (300) is provided at the lower end of the gas box (200), wherein the air inlet pipe (300) is used to be connected to a gas supply system; A spraying device (150) and a hot air drying device (160) are provided in the gas box (200), and the aluminum foil (100) passes through the spraying device (150) and the hot air drying device (160) in sequence and is then rolled up on the collecting roller (140).

2. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 1, characterized in that: It also includes an outer transmission component and an inner transmission component, wherein the inner transmission component is arranged inside the gas box (200); and the outer transmission component is arranged outside the gas box (200); The aluminum foil (100) passes through the outer conveying assembly, enters the gas box (200), and passes through the inner conveying assembly before being wound onto the collecting roller (140).

3. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 2, characterized in that: The spraying device (150) comprises two spraying nozzles (180), the two spraying nozzles (180) are arranged opposite to each other, and the aluminum foil (100) passes between the two spraying nozzles (180).

4. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 3, characterized in that: The hot air drying device (160) comprises two hot air drying components (170), the two hot air drying components (170) are symmetrically arranged, and the aluminum foil (100) passes between the two hot air drying components (170).

5. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 2, characterized in that: The inner conveying assembly comprises a first conveying roller (900), a second conveying roller (110), a third conveying roller (120) and a fourth conveying roller (130); the first conveying roller (900) and the fourth conveying roller (130) are arranged on the same horizontal plane; A second conveying roller (110) is provided at the lower end of the first conveying roller (900), a third conveying roller (120) is provided at the lower end of the fourth conveying roller (130), and the second conveying roller (110) and the third conveying roller (120) are provided at the same horizontal plane.

6. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 5, characterized in that: The outer conveying assembly comprises a sixth conveying roller (500), a seventh conveying roller (600), an eighth conveying roller (700) and a ninth conveying roller (800); the sixth conveying roller (500) and the ninth conveying roller (800) are arranged on the same horizontal plane; A seventh conveying roller (600) is provided at the lower end of the sixth conveying roller (500), an eighth conveying roller (700) is provided at the lower end of the ninth conveying roller (800), and the seventh conveying roller (600) and the eighth conveying roller (700) are provided on the same horizontal plane; The ninth conveying roller (800) and the first conveying roller (900) are arranged on the same horizontal plane.

7. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 5, characterized in that: The spraying device (150) and the hot air drying device (160) are arranged between the first conveying roller (900) and the second conveying roller (110).

8. The production device of lithium-supplemented carbon-coated aluminum foil according to claim 7, characterized in that: The air outlet pipe (400) is provided with an air outlet valve (401), and the air inlet pipe (300) is provided with an air inlet valve (301).

Images