A device for removing oil from a battery aluminum foil

Abstract

This invention relates to the field of battery aluminum foil processing technology, and provides an oil removal device for battery aluminum foil, comprising a feeding roller, a heating tank, a cleaning and oil absorption mechanism, and a receiving roller through which the aluminum foil body passes in sequence. The heating tank contains a cleaning agent. The cleaning and oil absorption mechanism includes an oil collecting cylinder, an oil squeezing roller, and a filter cylinder. The filter cylinder is fitted around and rotatably connected to the oil collecting cylinder, and an oil-absorbing sponge is provided on its surface. An oil inlet is located at the top of the oil collecting cylinder. The oil squeezing roller is positioned above the oil inlet, squeezing the oil-absorbing sponge to expel oil into the oil inlet. This invention can more effectively clean the rolling oil from the aluminum foil, ensuring aluminum foil quality and preventing oil stains.

Description

Technical Field

[0001] This invention relates to the field of battery aluminum foil processing technology, and more specifically, to an oil removal device for battery aluminum foil. Background Technology

[0002] As a current collector in lithium-ion batteries, aluminum foil is typically used in the lithium-ion battery industry as the positive electrode current collector. The industry has high requirements for the uniformity of color, flatness, and smoothness of the aluminum foil. However, during the production process, the surface of freshly rolled aluminum foil is more or less covered with rolling oil. The aluminum foil surface needs to be degreased to meet the requirements for use; otherwise, it will affect the battery performance.

[0003] Traditional aluminum foil production typically employs heat treatment for degreasing, relying primarily on the oil's volatilization during annealing. However, rolling oil is formulated from base oil and additives in specific proportions. The base oil possesses a certain viscosity and concentration, making it difficult to volatilize during annealing. Furthermore, aluminum foil often retains aluminum powder or non-metallic foreign matter on its surface due to friction, forming sludge that makes this method ineffective at cleaning the oil. Additionally, the high temperatures of annealing can cause the carbon chains in the oil film to decompose and oxidize, leading to aluminum foil contamination and the formation of yellowish-brown oil spots, resulting in poor degreasing performance. Summary of the Invention

[0004] The purpose of this invention is to provide an oil removal device for battery aluminum foil that has a better oil removal effect and prevents oil residue from the rolling mill from causing pollution.

[0005] The embodiments of the present invention are achieved through the following technical solutions: an oil removal device for battery aluminum foil, comprising a feeding roller, a heating tank, a cleaning and oil absorption mechanism, and a receiving roller through which the aluminum foil body passes in sequence; the heating tank is provided with a cleaning agent; the cleaning and oil absorption mechanism includes an oil collecting cylinder, an oil squeezing roller, and a filter cylinder; the filter cylinder is sleeved outside the oil collecting cylinder and rotatably connected to it; the surface of the filter cylinder is provided with an oil-absorbing sponge, and the top of the oil collecting cylinder has an oil inlet; the oil squeezing roller is located above the oil inlet, so that the oil squeezing roller squeezes the oil-absorbing sponge to expel oil into the oil inlet.

[0006] Preferably, both ends of the oil collecting cylinder are provided with adjusting screws, and springs are sleeved on the adjusting screws. Both ends of the oil squeezing roller are provided with connecting seats, which pass through the adjusting screws and compress the springs. An adjusting nut is locked at one end of the adjusting screw.

[0007] Preferably, a bearing is installed between the oil collecting cylinder and the filter cylinder, and an end face gear is installed at one end of the filter cylinder. The end face gear is meshed with a drive gear, which drives the filter cylinder to rotate relative to the oil collecting cylinder.

[0008] Preferably, it also includes a roller brush cylinder, which is rotatably connected to the heating pool, and the roller brush cylinder has two sets that act on both sides of the aluminum foil body respectively.

[0009] Preferably, the two roller brushes are arranged side by side, with one roller brush contacting the aluminum foil body on the lower side and the other roller brush contacting the aluminum foil body on the upper side.

[0010] Preferably, it further includes an air blowing assembly, which is located at the edge of the heating pool and is disposed close to the cleaning and oil suction mechanism. The air blowing assembly includes an upper air blowing pipe and a lower air blowing pipe, which are arranged at an angle.

[0011] Preferably, it also includes an annealing furnace, which is disposed between the cleaning and oil-absorbing mechanism and the receiving roller, so that the aluminum foil body passes through the annealing furnace.

[0012] Preferably, the oil inlet is a straight notch, and the cross-section of the oil inlet is arc-shaped.

[0013] The technical solution of this invention has at least the following advantages and beneficial effects: Compared with the prior art, this invention first feeds the aluminum foil body into a heating tank filled with cleaning agent, which facilitates the softening of oil stains by heat, and most of the oil stains dissolve into the heating tank. The aluminum foil is then conveyed by a rolling oil-absorbing sponge to absorb the residual oil stains on the surface of the aluminum foil. At the same time, when the oil-absorbing sponge rotates to the upper side, the oil-squeezing roller will squeeze the oil-absorbing sponge, so that the saturated oil passes through the filter cylinder and flows into the oil collection cylinder. The oil-absorbing sponge regains its good oil absorption capacity, achieving a better and cleaner oil removal effect on the aluminum foil body, avoiding high-viscosity oil stains residue, and ensuring the quality of the aluminum foil used to make batteries. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the degreasing device for battery aluminum foil provided in an embodiment of the present invention;

[0016] Figure 2 for Figure 1 A magnified view of point A in the image;

[0017] Figure 3 This is a schematic diagram of the cleaning and oil suction mechanism in this invention;

[0018] Figure 4for Figure 3 A magnified view of point B in the image;

[0019] Figure 5 for Figure 3 A schematic diagram of the cross-sectional structure of the oil collecting cylinder in the middle;

[0020] Figure 6 This is a schematic diagram of the connection structure between the end face gear disk and the drive gear in this invention.

[0021] Icons: 1-Feeding roller, 2-Heating tank, 21-Cleaning agent, 3-Rolling brush cylinder, 4-Blowing assembly, 41-Upper air blower, 42-Lower air blower, 5-Oil cleaning and suction mechanism, 51-Oil collection cylinder, 511-Oil inlet, 52-Oil squeezing roller, 521-Connecting seat, 522-Adjusting nut, 523-Adjusting screw, 524-Spring, 53-Filter cylinder, 54-Oil-absorbing sponge, 55-Bearing, 56-End face gear plate, 57-Drive gear, 6-Annealing furnace, 7-Collection roller, 8-Aluminum foil body. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example

[0026] The following description, in conjunction with specific embodiments, provides further details. Figures 1-6As shown, this embodiment is an oil removal device for battery aluminum foil, including a feeding roller 1, a heating tank 2, a cleaning and oil absorption mechanism 5, and a receiving roller 7 through which the aluminum foil body 8 passes in sequence. The heating tank 2 contains a cleaning agent 21. The cleaning and oil absorption mechanism 5 includes an oil collecting cylinder 51, an oil squeezing roller 52, and a filter cylinder 53. The filter cylinder 53 is fitted around and rotatably connected to the oil collecting cylinder 51. An oil-absorbing sponge 54 is provided on the surface of the filter cylinder 53, and an oil inlet 511 is provided at the top of the oil collecting cylinder 51. The oil squeezing roller 52 is positioned above the oil inlet 511, causing the oil to be squeezed from the oil-absorbing sponge 54 and enter the oil inlet 511. Specifically, this invention cleans the aluminum foil body 8 by first passing it through the feeding roller 1 into the heating tank 2. The high temperature in the heating tank 2 effectively removes the viscosity of the aluminum foil body 8. The higher levels of oil sludge soften and dissolve in the heating tank 2. At the same time, aluminum powder and most of the sludge are also removed. The aluminum foil body 8 is then conveyed to the cleaning and oil absorption mechanism 5. The aluminum foil body 8 comes into contact with the oil-absorbing sponge 54. The filter cylinder 53 is connected to a power source that drives the oil-absorbing sponge 54 to rotate synchronously. The oil collection cylinder 51 is located inside the filter cylinder 53 and does not rotate. During the rolling process, the oil-absorbing sponge 54 continues to contact the aluminum foil body 8, absorbing the residual oil on the surface of the aluminum foil. When the oil-absorbing sponge 54 rolls to the top, the oil-squeezing roller 52 squeezes the oil-absorbing sponge 54, squeezing out the absorbed oil. The oil penetrates the filter cylinder 53 and enters the oil inlet 511 for collection, ensuring that the oil-absorbing sponge 54 always has good oil absorption capacity. The entire device has a good oil removal effect on the aluminum foil body 8, ensuring the production quality of the battery.

[0027] It is worth noting that the cleaning agent 21 can be an organic solvent or an emulsifier, and the aluminum foil body 8 can be rinsed with clean water when it is conveyed out of the heating tank 2 (not shown in the figure).

[0028] like Figure 3 , Figure 4 and Figure 5 As shown, in order to adjust the parallelism between the oil squeezing roller 52 and the filter cylinder 53 and ensure that the oil squeezing roller 52 squeezes the oil-absorbing sponge 54 evenly, both ends of the oil collecting cylinder 51 in this embodiment are provided with adjusting screws 523, and springs 524 are sleeved on the adjusting screws 523. Both ends of the oil squeezing roller 52 are provided with connecting seats 521, which pass through the adjusting screws 523 and squeeze the springs 524. One end of the adjusting screws 523 is locked with adjusting nuts 522. At the same time, the distance between the oil squeezing roller 52 and the oil-absorbing sponge 54 can be changed by adjusting the screws 523. When the distance is smaller, the oil squeezing effect on the oil-absorbing sponge 54 is better.

[0029] like Figure 3 , Figure 5 and Figure 6As shown, a bearing 55 is installed between the oil collecting cylinder 51 and the filter cylinder 53, and an end face gear 56 is installed at one end of the filter cylinder 53. The end face gear 56 is meshed with a drive gear 57, which drives the filter cylinder 53 to rotate relative to the oil collecting cylinder 51. Specifically, the rotation of the drive gear 57 drives the end face gear 56 to drive the filter cylinder 53, which, together with the bearing 55, enables the oil-absorbing sponge 54 and the filter cylinder 53 to rotate relative to the oil collecting cylinder 51.

[0030] like Figure 1 As shown, in order to improve the effect of removing sludge and oil stains, a roller brush cylinder 3 is also provided in the heating tank 2. The roller brush cylinder 3 is rotatably connected in the heating tank 2, and the roller brush cylinder 3 has two sets that act on both sides of the aluminum foil body 8 respectively. The surface of the roller brush cylinder 3 is a flexible brush head to avoid scratching the surface of the aluminum foil. The roller brush cylinder 3 contacts the aluminum foil body 8, which helps to remove oil stains and sludge left in the cleaning agent 21.

[0031] Furthermore, two roller brush cylinders 3 are installed side by side, one roller brush cylinder 3 contacts the lower side of the aluminum foil body 8, and the other roller brush cylinder 3 contacts the upper side of the aluminum foil body 8; specifically, one roller brush cylinder 3 is used to guide the movement direction of the aluminum foil body 8 and can clean the upper surface of the aluminum foil body 8, while the other roller brush cylinder 3 is used to contact and clean the lower surface of the aluminum foil body 8.

[0032] like Figure 1 and Figure 2 As shown, it also includes an air blowing assembly 4, which is located at the edge of the heating pool 2 and is positioned close to the cleaning and oil absorption mechanism 5. The air blowing assembly 4 includes an upper air blowing pipe 41 and a lower air blowing pipe 42, which are arranged at an angle. Specifically, when the aluminum foil body 8 is cleaned by the heating pool 2, most of the residual liquid on the aluminum foil body 8 can be blown away by the action of the upper air blowing pipe 41 and the lower air blowing pipe 42, so that the oil absorption sponge 54 can remove oil more thoroughly.

[0033] As a precaution, the aluminum foil body 8 may still have a small amount of oil film remaining after passing through the oil-absorbing sponge 54. Before rewinding, the aluminum foil body 8 will slowly pass through the annealing furnace 6. The annealing furnace 6 is located between the cleaning and oil-absorbing mechanism 5 and the take-up roller 7, so that the aluminum foil body 8 passes through the annealing furnace 6. The temperature of the annealing furnace 6 is 230°C, and the small amount of oil film can be fully heated and evaporated.

[0034] like Figure 3 and Figure 5 As shown, in order to ensure that the oil can fully enter the oil inlet 511, the oil inlet 511 is a straight notch and the cross-section of the oil inlet 511 is arc-shaped; it is worth noting that the length of the oil inlet 511 is greater than the width of the aluminum foil body 8.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil removal device for battery aluminum foil, characterized in that: The aluminum foil body (8) passes through a feeding roller (1), a heating pool (2), a cleaning and oil absorption mechanism (5), and a receiving roller (7) in sequence. The heating pool (2) is provided with a cleaning agent (21). The cleaning and oil suction mechanism (5) includes an oil collection cylinder (51), an oil squeezing roller (52) and a filter cylinder (53). The filter cylinder (53) is fitted around the oil collection cylinder (51) and rotatably connected to it. An oil-absorbing sponge (54) is provided on the surface of the filter cylinder (53), and an oil inlet (511) is provided at the top of the oil collection cylinder (51). The oil squeezing roller (52) is located above the oil inlet (511), so that the oil squeezing roller (52) squeezes the oil-absorbing sponge (54) to expel oil into the oil inlet (511); Both ends of the oil collecting cylinder (51) are provided with adjusting screws (523), and springs (524) are sleeved on the adjusting screws (523). Both ends of the oil squeezing roller (52) are provided with connecting seats (521). The connecting seats (521) pass through the adjusting screws (523) and squeeze the springs (524). One end of the adjusting screws (523) is locked with an adjusting nut (522). A bearing (55) is installed between the oil collecting cylinder (51) and the filter cylinder (53), and an end face gear disk (56) is installed at one end of the filter cylinder (53). The end face gear disk (56) is meshed with a drive gear (57), which drives the filter cylinder (53) to rotate relative to the oil collecting cylinder (51). It also includes a roller brush cylinder (3), which is rotatably connected to the heating pool (2), and the roller brush cylinder (3) is provided with two sets that act on both sides of the aluminum foil body (8).

2. The oil removing apparatus for battery aluminum foil according to claim 1, characterized by: The two roller brush cylinders (3) are arranged side by side, with one roller brush cylinder (3) contacting the aluminum foil body (8) on the lower side and the other roller brush cylinder (3) contacting the aluminum foil body (8) on the upper side.

3. The oil removing apparatus for battery aluminum foil according to claim 1, characterized by: It also includes an air blowing assembly (4), which is located at the edge of the heating pool (2) and is located next to the cleaning and oil suction mechanism (5). The air blowing assembly (4) includes an upper air blowing pipe (41) and a lower air blowing pipe (42), which are arranged at an angle.

4. The oil removing apparatus for battery aluminum foil according to any one of claims 1 to 3, characterized by: It also includes an annealing furnace (6), which is located between the cleaning and oil suction mechanism (5) and the receiving roller (7), so that the aluminum foil body (8) passes through the annealing furnace (6).

5. The oil removing apparatus for battery aluminum foil according to claim 1, characterized by: The oil inlet (511) is a straight notch, and the cross-section of the oil inlet (511) is arc-shaped.

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