Flattening and cooling device for current collector after evaporation

Abstract

The utility model discloses a flattening and cooling device for a current collector after evaporation, which comprises a rotatable flattening roller and a cooling roller, the flattening roller is arranged at the front part of the cooling roller, the flattening roller is used for flattening the current collector after evaporation and transferring the flattened current collector to the cooling roller, and the cooling roller is used for cooling the flattened current collector; the flattening roller comprises a flattening roller body and a shaft head; the surface of the roller body of the flattening roller is coated with an elastic material layer; the flattening roller body comprises a fixed mandrel, a cooling water channel is arranged in the flattening roller body, and the cooling water channel is spread all over the fixed mandrel in a reciprocating mode; the shaft heads are arranged at the two ends of the flattening roller body and provided with water inlets and water outlets communicated with the cooling water channels. The flattening roller in front of the cooling roller is cooled, the surface of the flattening roller is prevented from slipping when a current collector is flattened at high temperature, wrinkles on the current collector are reduced, and aluminum steam is not prone to entering the flattening roller to be deposited to form aluminum slag to affect rotation of the flattening roller by fully cooling the flattening roller from inside to outside.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a current collector flattening and cooling device after vapor deposition. Background Technology

[0002] In the preparation of aluminum composite current collectors, vacuum evaporation is typically used to deposit aluminum atoms onto the surface of a polymer base film. Aluminum composite current collectors combine the mechanical and structural advantages of polymer films with the electrochemical properties of aluminum. After evaporation, the aluminum composite current collector is generally flattened and cooled by flattening rollers and cooling rollers. The flattening rollers are located in front of the cooling rollers; they drive and pre-flatten the evaporated aluminum composite current collector, while the cooling rollers cool the flattened aluminum composite current collector.

[0003] After vapor deposition, the aluminum composite current collector carries some aluminum vapor, which easily penetrates into the flattening roller and cooling roller, forming aluminum dross. This is especially true for the flattening roller before the cooling roller, as the flattening roller does not have a cooling function. The high temperature of the vapor-deposited aluminum composite current collector and the aluminum vapor it carries causes the flattening roller to heat up to 80 or 90 degrees Celsius. The flattening roller is encased in high-temperature aluminum vapor, making it easy for aluminum dross to penetrate inside. This results in uneven rotation of the flattening roller, high resistance, and failure to achieve a good flattening effect, or even film breakage, affecting the production process. Furthermore, the heat causes the rubber surface material of the flattening roller to slip during transmission and pre-flattening of the aluminum composite current collector, preventing the composite current collector film from being effectively spread out. This results in slight wrinkles on both sides of the finished film.

[0004] Currently, the cooling of the flattening roller is achieved through artificial cooling after the roller has been in operation for a period of time, which reduces production efficiency. Other solutions disclosed in the existing technology include adding a shaft roller on one side of the flattening roller to conduct heat through contact with the roller. However, this method has limited cooling effect on the flattening roller, mainly achieving surface cooling. It still cannot effectively cool the inside of the flattening roller. Aluminum vapor can easily penetrate into the interior of the flattening roller from the shaft end, forming aluminum dross. This results in the flattening roller rotating unevenly and with high resistance. Furthermore, the addition of a shaft roller to conduct heat through contact with the flattening roller further increases the rotational resistance of the flattening roller, which is not conducive to practical production applications. Utility Model Content

[0005] The purpose of this invention is to address the above-mentioned problems by providing a device for flattening and cooling a current collector after vapor deposition.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A current collector flattening and cooling device after vapor deposition, characterized in that: it includes a rotatable flattening roller and a cooling roller, wherein the flattening roller is located in front of the cooling roller, the flattening roller is used to flatten the vapor-deposited current collector and transfer it to the cooling roller, and the cooling roller is used to cool the flattened current collector.

[0008] The flattening roller includes a flattening roller body and a shaft head; the surface of the flattening roller body is covered with an elastic material layer, which is used to flatten the current collector; the flattening roller body includes a fixed mandrel, and a cooling water channel is provided inside the flattening roller body, which is distributed throughout the fixed mandrel in a reciprocating manner; the shaft head is located at both ends of the flattening roller body, and the shaft head has an inlet and an outlet that connect to the cooling water channel.

[0009] To optimize the above technical solution, the specific measures also include:

[0010] A bushing is fitted outside the fixed mandrel, and the bushing is provided with several annular bearing rings, which can rotate along the bushing.

[0011] A cylindrical support structure is installed on the outside of the bearing collar, and the elastic material layer is disposed on the outer surface of the cylindrical support structure. The cylindrical support structure, the bearing collar, and the elastic material layer together form a rotatable roller shell.

[0012] Specifically, the shaft head includes a central fixed part and a turntable surrounding the fixed part; the roller shell is connected to the turntable of the shaft head, the turntable of the shaft head is connected to an external drive device, and the fixed mandrel is connected to the fixed part of the shaft head; the fixed part of the shaft head is connected to an external support structure and connects the cooling water channel inside the flattening roller body to an external water pipe; the shaft head can rotate the roller shell relative to the fixed mandrel and bushing under the drive of the drive device.

[0013] The fixed part of the shaft head at one end of the flattening roller body is provided with an inlet that connects to the cooling water channel, and the fixed part of the shaft head at the other end of the flattening roller body is provided with an outlet that connects to the cooling water channel.

[0014] As a preferred embodiment, the flattening roller body is provided with two cooling water channels, including a first cooling water channel and a second cooling water channel. The fixed part of the shaft head at one end of the flattening roller body is provided with a first water inlet connected to the first cooling water channel and a second water outlet connected to the second cooling water channel. The fixed part of the shaft head at the other end of the flattening roller body is provided with a second water inlet connected to the second cooling water channel and a first water outlet connected to the first cooling water channel.

[0015] Furthermore, the elastic material layer is a nitrile rubber layer.

[0016] Preferably, the cylindrical support structure is an alloy steel cylinder.

[0017] Furthermore, a sealing ring is provided between the fixed part at the center of the shaft head and the turntable surrounding the fixed part.

[0018] Preferably, the paths of the two cooling water channels are staggered vertically or horizontally.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The flattening roller of this invention includes a flattening roller body and a shaft head. The flattening roller body includes a fixed mandrel, and cooling water channels are provided inside the flattening roller body. The cooling water channels are distributed throughout the fixed mandrel in a reciprocating manner. The reciprocating cooling water channel design allows the cooling water to form a distributed flow inside the flattening roller body, which fully cools the fixed mandrel from the inside to the outside, making it difficult for aluminum vapor to penetrate into the interior of the flattening roller and deposit to form aluminum dross, thus affecting the rotation of the flattening roller. Moreover, this invention does not require a separate cooling device that contacts the surface of the flattening roller, making the rotation of the flattening roller smoother.

[0021] A bushing is fitted outside the fixed mandrel, and several annular bearing rings are provided on the bushing. The bearing rings can rotate along the bushing. A cylindrical support structure is installed on the outside of the bearing rings. An elastic material layer is provided on the outer surface of the cylindrical support structure. The cylindrical support structure, the bearing rings, and the elastic material layer form a rotatable roller shell. The roller shell serves as the rotating part, and the fixed mandrel and the bushing installed on it serve as the fixing part, so that the cooling water channel cools the inside to the outside and the flattening roller rotates to flatten the collector at the same time.

[0022] This invention cools down the flattening roller before the cooling roller, making the flattening effect of the flattening roller better; cooling down the flattening roller can prevent the elastic material layer on the surface of the flattening roller from slipping when flattening the current collector at high temperature, and reduce the formation of wrinkles on the current collector.

[0023] The present invention preferably adopts a method of simultaneous water intake at both ends, which has a better cooling effect and makes the cooling effect at both ends of the flattening roller uniform, so that the flattening effect on the collector can also be uniform, avoiding the formation of more wrinkles on one side of the collector. Attached Figure Description

[0024] Figure 1 : Schematic diagram of current collector vapor deposition.

[0025] Figure 2 Schematic diagram of partial cross-sectional structure of the flattening roller.

[0026] Figure 3 : Schematic diagram of shaft head structure.

[0027] Figure 4 : A schematic diagram of the cooling water channel in one embodiment.

[0028] Figure 5: A schematic diagram of the cooling water channel in another embodiment.

[0029] In the diagram: 1-Aluminum wire disc, 2-Aluminum vapor, 3-Current collector, 4-Flattening roller, 5-Cooling roller, 6-Baffle, 7-Shaft head, 8-Elastic material layer, 9-Fixed spindle, 10-Cooling channel, 11-Shaft sleeve, 12-Bearing collar, 13-Cylindrical support structure, 14-Fixing part, 15-Turntable, 16-First cooling channel, 17-Second cooling channel. Detailed Implementation

[0030] The present invention will be further described in detail below through embodiments, but it should not be construed as the scope of the present invention being limited to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.

[0031] In the description of this utility model, it should also be noted that:

[0032] The orientations or positional relationships described herein are based on the relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of this utility model and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] This utility model provides a flattening and cooling device for a current collector 3 after vapor deposition, including a rotatable flattening roller 4 and a cooling roller 5. The flattening roller 4 is located in front of the cooling roller 5. The flattening roller 4 is used to flatten the vapor-deposited current collector 3 and transfer it to the cooling roller 5. The cooling roller 5 is used to cool the flattened current collector 3. Figure 1 As shown, the flattening roller 4 is positioned diagonally above the evaporation boat of the aluminum evaporation wire, and the cooling roller 5 is located behind the flattening roller 4.

[0035] The flattening roller 4 of this utility model includes a flattening roller body and a shaft head 7; the surface of the flattening roller body is covered with an elastic material layer 8, which is used to flatten the current collector 3; in some embodiments, the elastic material layer 8 can generally be made of nitrile rubber, but is not limited to this, and a material with a certain degree of elasticity is beneficial to the flattening effect. The cooling effect of the flattening roller 4 of this utility model can prevent the elastic material layer 8 from slipping when flattening the current collector 3 at high temperature, and reduce the generation of wrinkles.

[0036] The flattening roller body includes a fixed mandrel 9, and cooling water channels 10 are provided inside the flattening roller body. The cooling water channels 10 are distributed throughout the fixed mandrel 9 in a reciprocating manner, such as... Figure 4 As shown.

[0037] The shaft head 7 is located at both ends of the flattening roller body, and the shaft head 7 has an inlet and an outlet that connect to the cooling water channel 10.

[0038] The design of the reciprocating cooling water channel 10 enables the cooling water to flow throughout the flattening roller body, effectively cooling the fixed spindle 9. The cooling from the inside out prevents aluminum vapor 2 from penetrating into the interior of the flattening roller 4 and depositing to form aluminum slag.

[0039] A bushing 11 is fitted around the fixed mandrel 9, and several annular bearing rings 12 are provided on the bushing 11. The bearing rings 12 can rotate along the bushing 11. Figure 2 As shown.

[0040] A cylindrical support structure 13 is installed on the outside of the bearing collar 12, and an elastic material layer 8 is provided on the outer surface of the cylindrical support structure 13. The cylindrical support structure 13, the bearing collar 12 and the elastic material layer 8 form a rotatable roller shell.

[0041] The shaft head 7 includes a central fixing part 14 and a rotating disk 15 surrounding the fixing part 14, such as Figure 3 As shown; the roller shell is connected to the turntable 15 of the shaft head 7, the turntable 15 of the shaft head 7 is connected to an external drive device (not shown in the figure, a conventional structure), the fixed spindle 9 is connected to the fixing part 14 of the shaft head 7; the fixing part 14 of the shaft head 7 is connected to an external support structure (not shown in the figure, a conventional structure), and connects the cooling water channel 10 inside the flattening roller body to an external water pipe; the shaft head 7 can rotate the roller shell relative to the fixed spindle 9 and the bushing 11 under the drive of the drive device.

[0042] The roller shell serves as the rotating part, and the fixed spindle 9 and the bushing 11 mounted on it serve as the fixing part 14, so as to realize the cooling water channel 10 to cool from the inside to the outside and the function of the flattening roller 4 to rotate and flatten the collector 3.

[0043] In some embodiments, the fixing part 14 of the shaft head 7 at one end of the flattening roller body is provided with an inlet that connects to the cooling water channel 10, and the fixing part 14 of the shaft head 7 at the other end of the flattening roller body is provided with an outlet that connects to the cooling water channel 10.

[0044] like Figure 5As shown, in some preferred embodiments, the flattening roller body is provided with two cooling water channels 10, including a first cooling water channel 16 and a second cooling water channel 17. The paths of the two cooling water channels 10 are staggered vertically or horizontally. The fixing part 14 of the shaft head 7 at one end of the flattening roller body is provided with a first water inlet connecting to the first cooling water channel 16 and a second water outlet connecting to the second cooling water channel 17. The fixing part 14 of the shaft head 7 at the other end of the flattening roller body is provided with a second water inlet connecting to the second cooling water channel 17 and a first water outlet connecting to the first cooling water channel 16.

[0045] In this preferred embodiment, cooling water is simultaneously introduced into both ends of the flattening roller body, which improves the cooling effect and makes the cooling effect of both ends of the flattening roller 4 uniform, so that the flattening effect on the collector 3 can also be uniform, avoiding more wrinkles on one side of the collector 3.

[0046] In practical use, cooling water at 20℃-26℃ can be introduced into the inlet. The cooling water pressure is usually around 0.4 MPa. It flows in the reciprocating cooling water channel 10 inside the roller system, so that the cooling water can flow through various parts inside the flattening roller 4 and carry away the heat.

[0047] In some embodiments, the cooling water channel 10 is composed of a water guide pipe, and a water guide sleeve can be fitted on the water guide pipe to protect the water guide pipe and ensure smooth flow of cooling water.

[0048] In some embodiments, the cylindrical support structure 13 is an alloy steel cylinder. The cylindrical support structure 13 needs to have high strength and rigidity to withstand various forces during the working process and be able to rotate at high speed under stress. The shaft head 7 is made of the same or similar material as the cylindrical support structure 13 to ensure the strength and stability of the connection. The shaft head 7 is also preferably made of alloy steel.

[0049] In some embodiments, a sealing ring, such as a rubber sealing ring, is provided between the fixing part 14 at the center of the shaft head 7 and the turntable 15 around the fixing part 14 to prevent high-temperature aluminum vapor 2 from entering the flattening roller 4 from both ends.

[0050] This invention eliminates the need for a separate cooling roller that contacts the surface of the flattening roller 4 for heat transfer, thus avoiding increased rotational resistance of the flattening roller 4 and making its rotation smoother. Through its structural design, this invention enables simultaneous cooling from the inside out and rotational flattening, minimizing the impact of aluminum vapor 2 on the working state of the flattening roller 4.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the present utility model's technical solution and based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A current collector flattening and cooling device after vapor deposition, characterized in that: It includes a rotatable flattening roller and a cooling roller. The flattening roller is located in front of the cooling roller. The flattening roller is used to flatten the vapor-deposited current collector and transfer it to the cooling roller. The cooling roller is used to cool the flattened current collector. The flattening roller includes a flattening roller body and a shaft head; the surface of the flattening roller body is covered with an elastic material layer; the flattening roller body includes a fixed mandrel, and a cooling water channel is provided inside the flattening roller body, the cooling water channel being distributed throughout the fixed mandrel in a reciprocating manner; the shaft head is located at both ends of the flattening roller body, and the shaft head has an inlet and an outlet that connect to the cooling water channel.

2. The current collector flattening and cooling device according to claim 1, characterized in that: A bushing is fitted outside the fixed mandrel, and the bushing is provided with several annular bearing rings, which can rotate along the bushing.

3. The current collector flattening and cooling device according to claim 2, characterized in that: A cylindrical support structure is installed on the outside of the bearing collar, and the elastic material layer is disposed on the outer surface of the cylindrical support structure. The cylindrical support structure, the bearing collar, and the elastic material layer together form a rotatable roller shell.

4. The current collector flattening and cooling device according to claim 3, characterized in that: The shaft head includes a central fixed part and a turntable surrounding the fixed part; the roller shell is connected to the turntable of the shaft head, the turntable of the shaft head is connected to an external drive device, and the fixed mandrel is connected to the fixed part of the shaft head; the fixed part of the shaft head is connected to an external support structure and connects the cooling water channel inside the flattening roller body to an external water pipe; the shaft head can rotate the roller shell relative to the fixed mandrel and bushing under the drive of the drive device.

5. The current collector flattening and cooling device according to claim 4, characterized in that: The fixed part of the shaft head at one end of the flattening roller body is provided with an inlet that connects to the cooling water channel, and the fixed part of the shaft head at the other end of the flattening roller body is provided with an outlet that connects to the cooling water channel.

6. The current collector flattening and cooling device according to claim 4, characterized in that: The flattening roller body is provided with two cooling water channels, including a first cooling water channel and a second cooling water channel. The fixed part of the shaft head at one end of the flattening roller body is provided with a first water inlet that connects to the first cooling water channel and a second water outlet that connects to the second cooling water channel. The fixed part of the shaft head at the other end of the flattening roller body is provided with a second water inlet that connects to the second cooling water channel and a first water outlet that connects to the first cooling water channel.

7. The current collector flattening and cooling device according to claim 1, characterized in that: The elastic material layer is a nitrile rubber layer.

8. The current collector flattening and cooling device after vapor deposition according to claim 3, characterized in that: The cylindrical support structure is an alloy steel cylinder.

9. The current collector flattening and cooling device according to claim 4, characterized in that: A sealing ring is provided between the fixed part at the center of the shaft head and the turntable around the fixed part.

10. The current collector flattening and cooling device according to claim 6, characterized in that: The paths of the two cooling water channels intersect vertically or horizontally.

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