Double-side coating device

Abstract

The utility model discloses a double-side coating device which comprises a foil feeding assembly, a first coating assembly, a first drying assembly, a second coating assembly, a second drying assembly and a foil rolling assembly which are sequentially arranged, and the first coating assembly and the second coating assembly are respectively used for coating two sides of foil. The first drying assembly is an infrared drying box, and the second drying assembly is a drying oven. The utility model aims to solve the technical problems in the prior art, and provides a double-sided coating device, which can realize high-efficiency double-sided coating, improve the coating efficiency by 50%, optimize the original coating mode of passing through a drying oven twice into a mode of passing through the drying oven once, and finally roll up and form.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a double-sided coating device. Background Art

[0002] With the development of new energy, batteries, as one of the unit components of energy storage, play a very important role. The changes in the production methods and structures of their components determine the changes in functions and prices. As we all know, carbon-coated aluminum foil has been widely used in iron-lithium batteries due to its own advantages (it can reduce the contact internal resistance between the material and the current collector, reduce costs, reduce polarization during charging and discharging to improve rate performance, and prevent corrosion of the current collector itself). Carbon-coated aluminum foil also uses a coating process in the preparation process, but the coating process is double-sided coating. Although it does not need to be rewound, the aluminum foil needs to be baked twice. After multiple baking, the metal material will have an irreversible effect on its tensile strength and elongation. Utility Model Content

[0003] 1. Technical problems to be solved by the utility model

[0004] The utility model aims to solve the technical problems existing in the prior art and provide a double-sided coating device, which can realize efficient double-sided coating, improve the coating efficiency by 50%, optimize the original coating method of two times of passing through the oven to one time of passing through the oven, and finally roll up and form.

[0005] 2. Technical solution

[0006] In order to solve the above problems, the technical solution provided by the utility model is:

[0007] A double-sided coating device comprises a foil material input assembly, a first coating assembly, a first drying assembly, a second coating assembly, a second drying assembly and a foil material winding assembly which are arranged in sequence. The first coating assembly and the second coating assembly are respectively used for coating the two sides of the foil. The first drying assembly is an infrared drying box, and the second drying assembly is an oven.

[0008] Optionally, the foil material supply assembly comprises a foil material supply roller, a foil material passing roller and a pre-coating tension control roller which are arranged in sequence, and the foil material passing roller is arranged lower than the foil material supply roller and the pre-coating tension control roller.

[0009] Optionally, the first coating assembly includes a first slurry box, a first coating roller and a coating counter roller, wherein a portion of the first coating roller is immersed in the carbon coating slurry of the first slurry box, and the coating counter roller is disposed above the first coating roller.

[0010] Optionally, the second coating assembly includes a second slurry box, a second coating roller and a scraper baffle, the second slurry box is arranged below the second coating roller, the scraper baffle is inclined and the upper end surface of the scraper baffle is used as a slurry slope, and the scraper end of the scraper baffle is arranged downward close to the second coating roller.

[0011] Optionally, the foil winding assembly comprises a first out-of-box roller, a first foil winding roller and a second foil winding roller which are arranged in sequence, and the first foil winding roller is arranged higher than the out-of-box roller and the second foil winding roller.

[0012] Optionally, a coating smoothing roller and a first box-entering roller are sequentially arranged between the first coating component and the first drying component, and the surface of the coating smoothing roller has texture.

[0013] Optionally, a leveling roller group is provided between the first drying component and the second coating component.

[0014] Optionally, the leveling roller group includes a second box-out roller, a passing roller, a lower pressure roller and a lifting roller arranged in sequence, and the lower pressure roller is arranged lower than the passing roller and the lifting roller.

[0015] Optionally, a second box-entry roller is provided between the second coating assembly and the second drying assembly.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0018] This double-sided coating device uses infrared drying technology and oven baking technology to put the carbon-coated aluminum foil into the oven at one time and reel it into the finished product. At the same coating speed, the time taken to reel in a roll of carbon-coated aluminum foil is shortened by half; the yield rate is increased by 2% (the original technology yield rate is 95%, and the current one is more than 97%), and the wrinkle rate and broken belt defects of the process are reduced; the carbon-coated aluminum foil is applied to the product, and the broken belt rate of its coating roller is increased from 1 time in 10 rolls to 1 time in 25 rolls, which greatly improves the qualified rate of the product. It has made a great contribution to reducing costs and increasing efficiency. Secondly, it has made great improvements in improving the appearance of product coating. It has completely overcome the shortcomings of the original double-sided coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a double-sided coating device proposed in an embodiment of the utility model;

[0020] 1. Foil material incoming assembly; 11. Foil material incoming discharge roller; 12. Foil material incoming passing roller; 13. Pre-coating tension control roller; 2. First coating assembly; 21. First slurry box; 22. First coating roller; 23. Coating roller pair; 3. First drying assembly; 4. Second coating assembly; 41. Second slurry box; 42. Second coating roller; 43. Scraper baffle; 5. Second drying assembly; 6. Foil material winding assembly; 61. First out-of-box roller; 62. First foil material winding roller; 63. Second foil material winding roller; 7. Coating smoothing roller; 8. First in-box roller; 9. Smoothing roller group; 91. Second out-of-box roller; 92. Passing roller; 93. Lower pressure roller; 94. Lifting roller; 10. Second in-box roller. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0022] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Further, when an element is considered to be "fixedly connected to" another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socketing, snap-on, one-piece fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0025] Combined with Figure 1A double-sided coating device of this embodiment includes a foil material feeding component 1, a first coating component 2, a first drying component 3, a second coating component 4, a second drying component 5 and a foil material winding component 6 which are arranged in sequence. The foil is transported from the foil material feeding component 1 to the foil material winding component 6. The first coating component 2 and the second coating component 4 are respectively used to coat the two sides of the foil. The first coating component 2 coats the lower plane of the foil and dries it through the first drying component 3. Then, the second coating component 4 coats the upper plane of the foil and dries it through the second drying component 5. Finally, it is wound up by the foil material winding component 6. The first drying component 3 is an infrared drying box, and the second drying component 5 is an oven.

[0026] The advantages of infrared drying technology include: Fast drying speed: Due to the high thermal effect of infrared rays, water can be quickly vaporized, so the drying speed is very fast. Energy saving and high efficiency: Infrared drying technology can significantly reduce energy consumption and improve drying efficiency. Easy to control: Infrared drying technology can control the drying process by adjusting the power and irradiation time of infrared rays, and the operation is simple and convenient.

[0027] This double-sided coating device uses infrared drying technology and oven baking technology to put the carbon-coated aluminum foil into the oven at one time and reel it into the finished product. At the same coating speed, the time taken to reel in a roll of carbon-coated aluminum foil is shortened by half; the yield rate is increased by 2% (the original technology yield rate is 95%, and the current one is more than 97%), and the wrinkle rate and broken belt defects of the process are reduced; the carbon-coated aluminum foil is applied to the product, and the broken belt rate of its coating roller is increased from 1 time in 10 rolls to 1 time in 25 rolls, which greatly improves the qualified rate of the product. It has made a great contribution to reducing costs and increasing efficiency. Secondly, it has made great improvements in improving the appearance of product coating. It has completely overcome the shortcomings of the original double-sided coating.

[0028] As an optional solution of the present invention, the foil material incoming component 1 includes a foil material incoming feed roller 11, a foil material incoming feed roller 12 and a pre-coating tension control roller 13 which are arranged in sequence, the foil material incoming feed roller 12 is arranged lower than the foil material incoming feed roller 11 and the pre-coating tension control roller 13, the pre-coating tension control roller 13 controls the tension of the foil at 100-160N, and the foil passes under the foil material incoming feed roller 12 and over the pre-coating tension control roller 13 in sequence.

[0029] As an optional scheme of the utility model, the first coating assembly 2 includes a first slurry box 21, a first coating roller 22 and a coating pair of rollers 23. The first slurry box 21 contains carbon coating slurry with a viscosity of 10-300, a fineness of <5mm, and a solid content of 5%-15%. Part of the first coating roller 22 is immersed in the carbon coating slurry of the first slurry box 21, approximately one-tenth of the position. The coating pair of rollers 23 is arranged above the first coating roller 22. The first coating roller 22 and the coating pair of rollers 23 form a channel for the foil to pass through, and the lower end of the coating pair of rollers 23 is arranged lower than the lower end of the pre-coating tension control roller 13 to allow the foil to maintain a certain arc when passing through.

[0030] As an optional solution of the utility model, the infrared drying box includes an infrared box body, in which a light source and a plurality of dynamic rollers are arranged for assisting in conveying the foil, and the rotation speed of the plurality of dynamic rollers is the same as the coating speed.

[0031] As an optional scheme of the utility model, the second coating component 4 includes a second slurry box 41, a second coating roller 42 and a scraper baffle 43. The foil passes under the second coating roller 42. The second slurry box 41 is arranged under the second coating roller 42. The scraper baffle 43 is arranged on the side of the second coating roller 42 close to the first drying component 3. The scraper baffle 43 is inclined and the upper end surface of the scraper baffle 43 is used as a slurry slope. The scraper end of the scraper baffle 43 is arranged downward close to the second coating roller 42. The slurry flows to the second coating roller 42 through the scraper baffle 43 and is coated on the upper plane of the foil through the second coating roller 42. The distance between the scraper end of the scraper baffle 43 and the second coating roller 42 is the coating thickness. The slurry in the second slurry box 41 is pumped to the upper end surface of the scraper baffle 43 through other devices for use.

[0032] As an optional solution of the present invention, the foil winding assembly 6 includes a first outlet roller 61, a first foil winding roller 62 and a second foil winding roller 63 which are arranged in sequence. The foil coming out of the second drying assembly 5 passes under the first outlet roller 61 and is connected to the winding roller. The first foil winding roller 62 is arranged higher than the outlet roller 61 and the second foil winding roller 63. The first foil winding roller 62 and the second foil winding roller 63 are arranged to cooperate with each other to relieve the pressure of winding.

[0033] As an optional scheme of the utility model, a coating smoothing roller 7 and a first box-entry roller 8 are sequentially arranged between the first coating component 2 and the first drying component 3. The foil first passes over the coating smoothing roller 7 and then passes under the first box-entry roller 8 to enter the first drying component 3. The coating smoothing roller 7 rotates synchronously with the foil, and can smooth the slurry to achieve a smooth surface and good appearance. Its surface has certain texture, and the texture is generally a vertical texture roller. The function of the first box-entry roller 8 is to align the height of the foil with the height of the foil channel in the infrared drying box, so that the foil can enter the infrared drying box with less force.

[0034] As an optional solution of the present invention, a leveling roller group 9 is provided between the first drying component 3 and the second coating component 4. Specifically, the leveling roller group 9 includes a second box-out roller 91, a passing roller 92, a lower pressure roller 93 and a lifting roller 94 in sequence. The lower pressure roller 93 is arranged lower than the passing roller 92 and the lifting roller 94. The surface of the foil is smoother after passing through the leveling roller group 9. The foil passes under the second box-out roller 91, over the passing roller 92, under the lower pressure roller 93 and over the lifting roller 94 in sequence.

[0035] As an optional solution of the present invention, a second box-entering roller 10 is provided between the second coating component 4 and the second drying component 5. The second box-entering roller 10 is a box-entering roller for entering the oven, so that the height of the foil is flush with the height of the foil channel in the oven.

[0036] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A double-sided coating device, characterized in that: It includes a foil material incoming component, a first coating component, a first drying component, a second coating component, a second drying component and a foil winding component which are arranged in sequence. The first coating component and the second coating component are respectively used for coating the two sides of the foil. The first drying component is an infrared drying box, and the second drying component is an oven.

2. A double-sided coating device according to claim 1, characterized in that: The foil material supply assembly comprises a foil material supply roller, a foil material passing roller and a pre-coating tension control roller which are arranged in sequence, and the foil material passing roller is arranged lower than the foil material supply roller and the pre-coating tension control roller.

3. A double-sided coating device according to claim 1, characterized in that: The first coating assembly includes a first slurry box, a first coating roller and a coating pair of rollers, wherein a portion of the first coating roller is immersed in the carbon coating slurry of the first slurry box, and the coating pair of rollers is arranged above the first coating roller.

4. A double-sided coating device according to claim 1, characterized in that: The second coating assembly includes a second slurry box, a second coating roller and a scraper baffle. The second slurry box is arranged below the second coating roller. The scraper baffle is inclined and the upper end surface of the scraper baffle is used as a slurry slope. The scraper end of the scraper baffle is arranged downward close to the second coating roller.

5. A double-sided coating device according to claim 1, characterized in that: The foil winding assembly comprises a first out-of-box roller, a first foil winding roller and a second foil winding roller which are arranged in sequence, and the first foil winding roller is arranged higher than the out-of-box roller and the second foil winding roller.

6. A double-sided coating device according to any one of claims 1 to 5, characterized in that: A coating smoothing roller and a first box-entering roller are sequentially arranged between the first coating component and the first drying component, and the surface of the coating smoothing roller has textures.

7. A double-sided coating device according to any one of claims 1 to 5, characterized in that: A leveling roller group is provided between the first drying component and the second coating component.

8. A double-sided coating device according to claim 7, characterized in that: The leveling roller group includes a second box-out roller, a passing roller, a lower pressure roller and a lifting roller, and the lower pressure roller is arranged lower than the passing roller and the lifting roller.

9. A double-sided coating device according to any one of claims 1 to 5, characterized in that: A second box-entering roller is provided between the second coating assembly and the second drying assembly.

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