A double-sided simultaneous coating equipment for lithium battery current collector electrode

Abstract

The application discloses a kind of lithium battery current collector electrode double-sided simultaneous composite type coating equipment, it is by coating module, sealed cavity and guide roller module composition;The composite type coating equipment adopts two sides to be released structure, the coating module and guide roller module are respectively arranged the two sides of sealed cavity, and can be embedded and released from sealed cavity.It includes guide roller, sputtering coating unit, pretreatment ion source, preheating degassing unit, coating roller, evaporation coating unit, discharge roll, receiving roll, swing arm, rectification mechanism and partition plate.The lithium battery current collector electrode double-sided simultaneous composite type coating equipment is compatible with single-sided coating and double-sided simultaneous coating;Coating process uses multiple combination coating methods of sputtering coating and evaporation coating.The whole process is simplified into single equipment process completion, simplifies production procedure, reduces equipment cost, time cost and pollution control cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lithium ion batteries and the field of coating equipment, in particular to a lithium battery current collector electrode double-sided simultaneous composite coating equipment. BACKGROUND

[0002] The current commonly used positive and negative current collectors of lithium batteries are mainly copper foil, electrolytic copper foil, aluminum foil and sputtering coating; the existing technology and problems are as follows: 1. The copper foil and aluminum foil are rolled and pickled repeatedly, which requires high equipment, and the commonly used copper foil and aluminum foil can be made to 10-16 microns, but it is difficult to continue to thin, and the finished product quality cannot be further improved; 2. The electrolytic copper solution can produce 6-8 micron copper foil; however, the preparation of the electrolyte is complicated, the characteristics of electrolysis can cause the roughness of the two sides of the copper foil to be too large, and a series of surface treatments such as burr surface treatment, heat-resistant layer treatment and anti-oxidation treatment are required, and the smooth side needs to increase surface treatment to improve the surface adhesion rate; the overall process of electroplating is too complex, and the equipment cost, time cost and pollution control cost caused by the process are too high; 3. The sputtering coating is formed by high-energy ion bombardment of copper and aluminum metal into gaseous particles, and the gaseous particles are deposited on the molecular layer of the film surface to form chemical bonding, and the controllable coating thickness can reach nanometer level precision, the coating time is short, and the adhesion rate is high, but the production of the metal film has too high gas content, the overall cost is too high, and the energy consumption is too large. 4. The evaporation coating uses a certain heating evaporation method to evaporate copper and aluminum metals and gasify them, and the particles are deposited on the film surface to condense into a metal film. The surface metal film has low gas content, low energy consumption, and is suitable for large-scale thickening, but the adhesion strength of the evaporation coating substrate is low, which cannot meet the use requirements of the industry.

[0003] Therefore, it is of great significance and application prospect to develop a more optimal lithium battery current collector electrode double-sided simultaneous composite coating equipment to overcome the deficiencies in the existing process technology and reduce the production cost in the thickening process. SUMMARY

[0004] In view of the above problems, the present application provides a lithium battery current collector electrode double-sided simultaneous composite coating equipment, which is compatible with single-sided coating and double-sided simultaneous coating; the coating process adopts a variety of combined coating methods of sputtering coating and evaporation coating. The entire process is simplified to a single equipment process, which simplifies the production process and reduces equipment cost, time cost and pollution control cost.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] The application discloses a lithium battery current collector electrode double-sided simultaneous composite coating equipment, characterized by comprising a coating module, a sealed cavity and a guide roller module; the coating module and the guide roller module are arranged on the two sides of the sealed cavity and can be embedded and separated from the sealed cavity.

[0007] Preferably, the composite coating equipment comprises a guide roller, a sputtering coating unit, a pretreatment ion source, a coating roller, an evaporation coating unit, a preheating and degassing unit, a feeding roll, a receiving roll, a swing arm, a deviation rectifying mechanism and a partition plate.

[0008] Preferably, the guide roller is preset at a corresponding spatial position of the equipment according to the running path of the double-sided coating roll; and the guide roller is used for adjusting the running direction of the double-sided coating roll.

[0009] Preferably, the number of the sputtering coating unit and the pretreatment ion source is one or more, and the sputtering coating unit and the pretreatment ion source are arranged at preset positions around the coating roller according to a certain order according to process requirements.

[0010] Preferably, the number of the evaporation coating unit is one or more, and the evaporation coating unit is arranged directly below the coating roller according to evaporation characteristics.

[0011] Preferably, the feeding roll and the receiving roll are both provided with the swing arm and the deviation rectifying mechanism, so that the coating roll does not occur phenomena such as loosening, deformation and twisting in the whole running process.

[0012] Preferably, the preheating and degassing unit is arranged behind the feeding roll and before the receiving roll, and is used for preheating and degassing of the coating roll, so that the double-sided coating roll is in the best process state before and after coating.

[0013] Preferably, the composite coating equipment further comprises a partition plate arranged between different coating roller modules and between the coating roller module and other modules, so that the whole coating process is in a good process environment.

[0014] Preferably, the composite coating equipment can be a horizontal roll uniform distribution type or a vertical roll uniform distribution type.

[0015] Preferably, the composite coating equipment is compatible with single-sided coating and double-sided simultaneous coating of a film.

[0016] Preferably, the composite coating equipment adopts a plurality of combined coating methods of sputtering coating and evaporation coating.

[0017] Preferably, the plurality of combined coating methods are one of sputtering coating-evaporation coating-sputtering coating, sputtering coating-evaporation coating, sputtering coating-sputtering coating and sputtering coating-sputtering coating-evaporation coating.

[0018] The present application has the advantages of:

[0019] The device adopts single-sided and double-sided composite coating design, and single-process equipment is compatible with single-sided coating and thin film double-sided coating at the same time, coating process is completed in a short time, double-sided coating can offset the internal stress of the front and back surfaces; the coating process adopts multiple combination coating methods (sputtering coating-evaporation coating-sputtering coating, sputtering coating-evaporation coating, etc.) of sputtering coating and evaporation coating, a nanometer-level film is first formed on the surface to improve the overall adhesion rate and adhesion capacity of the film, then the film layer is thickened by evaporation coating to reduce the overall gas content of the coating layer, control the overall coating cost and time, and finally the film surface is densely coated by secondary sputtering to make the surface of the finished product uniform and smooth, and the thickness of the finished product is adjusted by nanometer-level error to meet the thickness requirement of the final product;

[0020] Compared with the production process of four kinds of positive and negative electrode current collectors in the prior art, the lithium battery current collector electrode double-sided simultaneous composite coating device provided by the present application simplifies the production process, simplifies the entire process into a single equipment process, completely eliminates the non-product raw materials and waste generated by complex process flow, and reduces equipment cost, time cost and pollution control cost; compared with the relatively single sputtering coating and evaporation coating technology, the multiple combination coating methods of sputtering coating and evaporation coating adopted by the present application solve the problem of high cost of single sputtering coating, utilize the fast film formation and low cost of evaporation coating, improve the coating efficiency, and at the same time have high adhesion rate of the surface of the sputtering coating and precision control of the outermost layer, which ensures the thickness precision requirement of the finished product.

[0021] The horizontal roll uniform distribution type and the vertical roll uniform distribution type can use different relative position structures of consumables and rolls according to the consumables and the assembly mode of the rolls in the use site, and reduce the replacement time of the coating module, the consumables and the rolls through appropriate installation mode. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings:

[0023] Figure 1 The present application provides a lithium battery current collector electrode double-sided simultaneous composite coating device front structure schematic diagram;

[0024] Figure 2 The present application provides a double-sided coating roll vertical uniform distribution type schematic diagram for the first embodiment;

[0025] Figure 3 The present application provides a double-sided coating roll horizontal uniform distribution type schematic diagram for the second embodiment;

[0026] Figure 4A schematic diagram of a vertically uniformly distributed single-sided coating material roll provided in Embodiment 3 of the invention;

[0027] Figure 5 This is a schematic diagram of a single-sided coating roll with a horizontally uniform distribution provided in Embodiment 4 of the invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] like Figure 1 As shown, this invention provides a double-sided simultaneous composite coating equipment for lithium battery current collector electrodes. The composite coating equipment consists of a coating module E01, a sealing cavity E02, and a guide roller module E03. The composite coating equipment adopts a two-sided detachable structure. The coating module E01 and the guide roller module E03 are respectively located on both sides of the sealing cavity E02 and can be inserted into and removed from the sealing cavity E02. The composite coating equipment includes guide rollers, a sputtering coating unit, a pretreatment ion source, a coating roller, an evaporation coating unit, a preheating and degassing unit, a feeding roll, a receiving roll, a swing arm, a correction mechanism, and a partition. The specific working process of this composite coating equipment is as follows: First, the mounting modules on both sides are pulled out and unfolded. The consumables of the coating module are replaced. Unprocessed feeding rolls need to be added to the guide roller module. Then, the thin film roll is guided through the guide roller and the coating roller to connect to the finished receiving roll. Installation is completed after the rollers are tensioned. Finally, the coating module and guide roller module are moved by a trolley and the mold is closed in the sealed cavity.

[0030] Example 1

[0031] like Figure 2As shown, the lithium battery current collector electrode double-sided simultaneous composite film coating equipment is a double-sided film coating roll vertical uniform distribution structure A00. It includes a guide roller A01, sputtering film coating units A02 and A10, pretreatment ion sources A03 and A13, film coating rollers A04 and A11, evaporation film coating units A05 and A12, preheating and degassing units A06 and A14, a feed roll A08, a receiving roll A16, swing arms A07 and A15, correction mechanisms A09 and A17, and a partition A18; the film coating roll 00 is fixed to the feed roll A08; the feed roll A08 is provided with a correction mechanism A09, and after the film coating roll 00 is transmitted from the feed roll A08, it is first subjected to a swing arm A07 mechanism to keep it in tension during the running process; then it is subjected to a preheating and degassing unit A06 for corresponding surface treatment; then it is sequentially subjected to a pretreatment ion source A03, a sputtering film coating unit A02, an evaporation film coating unit A05, a sputtering film coating unit A02, and a pretreatment ion source A03, thereby realizing the film coating work of the first side; then the double-sided film coating roll 00 enters the second film coating module according to the preset path through the guide roller A01, and is sequentially subjected to a pretreatment ion source A13, a sputtering film coating unit A10, an evaporation film coating unit A12, a sputtering film coating unit A10, and a pretreatment ion source A13 in the same way, thereby completing the film coating work of the other side; the roll 00 that has completed the film coating process needs to be subjected to a preheating and degassing unit A14 for corresponding surface treatment; finally, it is subjected to a swing arm mechanism A15 to ensure that it enters the receiving roll A16 under a preset tension; similarly, the receiving roll A16 is provided with a correction mechanism A17; at the same time, partitions A18 are provided between different film coating roller modules and between film coating roller modules and other modules to ensure that the entire film coating is always in a good process environment.

[0032] Example 2

[0033] As Figure 3As shown, the lithium battery current collector electrode double-sided simultaneous composite film coating equipment is a double-sided film coating material roll horizontal uniform distribution structure B00. It includes a guide roller B01, sputtering film coating units B02 and B10, pretreatment ion sources B03 and B13, film coating rollers B04 and B11, evaporation film coating units B05 and B12, preheating and degassing units B06 and B14, a material roll B08, a material receiving roll B16, swing arms B07 and B15, correction mechanisms B09 and B17, and a partition B18. The film coating material roll 00 is fixed to the material roll B08. The material roll B08 is provided with a correction mechanism B09. After the film coating material roll 00 is transmitted from the material roll B08, it is first subjected to a swing arm B07 mechanism to keep it in tension during the running process. Then, the preheating and degassing unit B06 is used for corresponding surface treatment. Next, the pretreatment ion source B03, the sputtering film coating unit B02, the evaporation film coating unit B05, the sputtering film coating unit B02, and the pretreatment ion source B03 are sequentially passed through, thereby realizing the film coating work of the first side. Then, the double-sided film coating material roll 00 enters the second film coating module according to the preset path through the guide roller B01, and is sequentially passed through the pretreatment ion source B13, the sputtering film coating unit B10, the evaporation film coating unit B12, the sputtering film coating unit B10, and the pretreatment ion source B13 in the same way, thereby completing the film coating work of the other side. The material roll 00 that has completed the film coating process needs to pass through the preheating and degassing unit B14 for corresponding surface treatment. Finally, it passes through the swing arm mechanism B15 to ensure that it enters the material receiving roll B16 under the preset tension. Similarly, the material receiving roll B16 is provided with a correction mechanism B17. At the same time, partitions B18 are provided between different film coating roller modules and between film coating roller modules and other modules to ensure that the entire film coating is always in a good process environment.

[0034] Example 3

[0035] As Figure 4As shown, the lithium battery current collector electrode double-sided simultaneous composite film coating equipment is a single-sided film coating roll vertical uniform distribution structure C00; it includes a guide roller C01, sputtering film coating units C02 and C10, pretreatment ion source C03 and C13, film coating rollers C04 and C11, evaporation film coating units C05 and C12, preheating and degassing units C06 and C14, a feed roll C08, a receiving roll C16, swing arms C07 and C15, a correction mechanism C09 and C17, and a partition C18; the film coating roll 00 is fixed to the feed roll C08; the feed roll C08 is provided with a correction mechanism C09, after the film coating roll 00 is transmitted from the feed roll C08, it is first subjected to a swing arm C07 mechanism to keep it in tension during the running process; then it is subjected to a preheating and degassing unit C06; to do the corresponding surface treatment; next, it is sequentially subjected to a pretreatment ion source C03, a sputtering film coating unit C02, an evaporation film coating unit C05, a sputtering film coating unit C02, and a pretreatment ion source C03, thereby realizing single-sided film coating work; the roll 00 that has completed the film coating process needs to pass through a preheating and degassing unit C14 to do the corresponding surface treatment; finally, it passes through a swing arm mechanism C15 to ensure that it enters the receiving roll C16 under a predetermined tension; similarly, the receiving roll C16 is provided with a correction mechanism C17; at the same time, a partition C18 is provided between the film coating roller module and other modules to ensure that the entire film coating is always in a good process environment.

[0036] Example 4

[0037] As Figure 5As shown, the lithium battery current collector electrode double-sided simultaneous composite coating equipment is a single-sided coating material roll transverse uniform distribution structure D00; it comprises a guide roller D01, sputtering coating units D02 and D10, pretreatment ion sources D03 and D13, coating rollers D04 and D11, evaporation coating units D05 and D12, preheating and degassing units D06 and D14, a material roll D08, a material receiving roll D16, swing arms D07 and D15, correction mechanisms D09 and D17, and a partition D18; the coating material roll 00 is fixed on the material roll D08; the material roll D08 is provided with a correction mechanism D09, after the coating material roll 00 is transmitted out from the material roll D08, it is first subjected to a swing arm D07 mechanism to keep it in a tension state during the running process; then it is subjected to a preheating and degassing unit D06; to make corresponding surface treatment; next, it is sequentially subjected to a pretreatment ion source D03, a sputtering coating unit D02, an evaporation coating unit D05, a sputtering coating unit D02, and a pretreatment ion source D03, so as to realize single-sided coating work; the material roll 00 that completes the coating process needs to pass through a preheating and degassing unit D14 to make corresponding surface treatment; finally, it passes through a swing arm mechanism D15 to ensure that it enters the material receiving roll D16 under a preset tension; similarly, the material receiving roll D16 is provided with a correction mechanism D17; at the same time, a partition D18 is arranged between the coating roller module and other modules to ensure that the entire coating is always in a good process environment.

[0038] In summary, the lithium battery current collector electrode double-sided simultaneous composite coating equipment provided by the application is composed of a coating module, a sealed cavity and a guide roller module; a two-side escape structure is adopted to split the function areas of the coating module and the guide roller module, thereby reducing the time for replacing consumables and material rolls of the coating module and maintaining the guide roller. The composite coating equipment has good process flexibility, the entire process is simplified to be completed by a single equipment process, completely eliminates the non-product raw materials input and waste generated by complex process flow, and reduces equipment cost, time cost and pollution treatment cost.

Claims

1. A lithium battery current collector electrode double-sided simultaneous composite film coating equipment, characterized in that, The composite coating equipment is composed of a coating module, a sealed cavity and a guide roller module; the composite coating equipment adopts a two-side ejection structure, the coating module and the guide roller module are respectively arranged on the two sides of the sealed cavity and can be embedded and ejected from the sealed cavity; the composite coating equipment comprises a guide roller, a sputtering coating unit, a pretreatment ion source, a preheating and degassing unit, a coating roller, an evaporation coating unit, a feed roll, a take-up roll, a swing arm, a deviation rectifying mechanism and a partition plate; the composite coating equipment is a horizontal roll uniform distribution type or a vertical roll uniform distribution type; the composite coating equipment is compatible with single-sided coating and thin film double-sided coating.

2. The combined coating apparatus according to claim 1, wherein The guide roller is preset at a corresponding spatial position of the equipment according to the running path of the double-sided coating roll.

3. The apparatus according to claim 1, wherein The number of the sputtering coating unit and the pretreatment ion source is one or more, and they are arranged in a certain order at preset positions around the coating roller according to process requirements.

4. The apparatus according to claim 1, wherein The number of the evaporation coating unit is one or more, and the evaporation coating unit is arranged directly below the coating roller according to evaporation characteristics.

5. The apparatus according to claim 1, wherein The feed roll and the take-up roll are both provided with the swing arm and the deviation rectifying mechanism to ensure that the coating roll does not loosen, deform, twist and the like during the whole running process.

6. The apparatus according to claim 1, wherein The preheating and degassing unit is arranged before the feed roll and after the take-up roll, and is used for preheating and degassing of the coating roll to ensure that the double-sided coating roll is in the best process state before and after coating.

7. The apparatus according to claim 1, wherein The partition plate is arranged between different coating roller modules and between the coating roller module and other modules to ensure that the whole coating process is in a good process environment.

8. The apparatus according to any one of claims 1 to 7, wherein The composite coating equipment adopts a plurality of combined coating methods of sputtering coating and evaporation coating.

9. The inline coating apparatus of any of claim 8, wherein, The plurality of combined coating methods are one of sputtering coating-evaporation coating-sputtering coating, sputtering coating-evaporation coating, sputtering coating-sputtering coating, sputtering coating-sputtering coating-evaporation coating.

Images