Anti-oxidation device for composite copper foil production

Abstract

The utility model discloses an anti-oxidation device for composite copper foil production, and relates to the technical field of composite copper foil production. Comprising a cavity unit, the cavity unit comprises an upper cavity and a lower cavity, and reserved holes used for containing an unwinding shaft of the water electroplating equipment are formed in the surfaces, making contact with each other, of the upper cavity and the lower cavity respectively; a film outlet is formed in the upper cavity; the cavity unit is also provided with an inflation port and an exhaust port; by arranging the preformed hole, the water electroplating equipment unwinding shaft with the polypropylene magnetic control film roll can be placed in the preformed hole, so that the polypropylene magnetic control film roll is convenient to transport and place; according to the composite copper foil disclosed by the invention, the cavity unit is provided with the inflation inlet, so that inert gas can be filled into the inflation inlet in a transportation and secondary coating process, so that the cavity unit is filled with the inert gas, the technical problem that a polypropylene magnetic control film roll in the cavity is in contact with air to be oxidized is effectively avoided, and the performance of the composite copper foil is effectively ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of composite copper foil production, and in particular relates to an anti-oxidation device for composite copper foil production. Background Art

[0002] Composite copper foil is a new type of current collector material for power batteries. It is mainly composed of three parts. The middle layer is a polypropylene base film, and both sides of the film are copper with a thickness of about 1μm. It is mainly a sandwich structure.

[0003] Compared with traditional metal current collectors, composite copper foil has the following characteristics:

[0004] It has the characteristics of high compressive strength, low density, low weight, high specific volume, good uniformity and high safety performance.

[0005] In the process of making composite copper foil, the polypropylene film needs to be coated for the first time through a magnetron sputtering device, and then the composite copper foil is obtained by a water electroplating device for the second coating.

[0006] Before the second coating, the base film after magnetron treatment often has film surface oxidation problems during transportation and the second coating process, which leads to changes in the coating structure and composition, seriously affecting the performance of the composite copper foil. Utility Model Content

[0007] The utility model aims to provide an anti-oxidation device for composite copper foil production to solve the problem of film surface oxidation during transportation and the second coating process of the base film after magnetron treatment before the second coating.

[0008] The purpose of this utility model is achieved through the following technical solutions:

[0009] An anti-oxidation device for composite copper foil production comprises a cavity unit, wherein the cavity unit comprises an upper cavity and a lower cavity, and reserved holes for placing a reel of a water electroplating device are respectively arranged on the mutually contacting surfaces of the upper cavity and the lower cavity; a film outlet is arranged on the upper cavity; and an air filling port and an air exhaust port are also arranged on the cavity unit.

[0010] Preferably, the upper cavity and the lower cavity are hinged to each other.

[0011] Preferably, the opening sides of the upper cavity and the lower cavity are connected by snap fasteners.

[0012] Preferably, sealing strips are provided on the surfaces of the upper cavity and the lower cavity that are in contact with each other.

[0013] Preferably, a guide roller is provided at the top of the upper cavity.

[0014] Preferably, the cavity unit is made of polypropylene.

[0015] Preferably, the film outlet is 1400 mm long and 3 mm wide.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] By setting a reserved hole on the contact surface of the upper cavity and the lower cavity, the unwinding shaft of the water electroplating equipment with the polypropylene magnetron film roll can be placed in the reserved hole to facilitate the transportation of the polypropylene magnetron film roll. At the same time, the size of the reserved hole is exactly the same as the size of the unwinding shaft of the water electroplating equipment to improve the sealing of the cavity unit; by setting a film outlet on the upper cavity, it is convenient to connect the polypropylene magnetron film roll with the first traction roller on the water electroplating equipment.

[0018] During transportation, the polypropylene magnetron film roll will come into contact with the air entering the cavity unit, resulting in oxidation of the polypropylene magnetron film roll. At the same time, in the second step of the coating process, after the unwinding position of the polypropylene magnetron film roll comes into contact with the air, the film roll will undergo oxidation reaction on its surface and inside as time goes by, thereby changing the coating structure and composition, and further affecting the performance of the composite copper foil. Based on this, the utility model provides an inflation port on the cavity unit, and inert gas can be filled into the inflation port during transportation and the second coating process to fill the cavity unit with inert gas, thereby effectively avoiding the technical problem of oxidation caused by the polypropylene magnetron film roll in the cavity coming into contact with the air, and effectively ensuring the performance of the composite copper foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : A schematic diagram of the forward three-dimensional structure of the utility model;

[0020] Figure 2 : A schematic diagram of the cross-sectional structure of the utility model viewed from the left;

[0021] In the figure: 1-upper cavity, 2-lower cavity, 3-reserved hole, 4-film outlet, 5-inflating port, 7-guide roller. DETAILED DESCRIPTION

[0022] Example 1

[0023] In the prior art, in the process of manufacturing the composite copper foil, the polypropylene film needs to be plated for the first time by a magnetron sputtering device, and then the composite copper foil needs to be plated for the second time by a water electroplating device.

[0024] Before the second coating, the base film after magnetron treatment often has film surface oxidation problems during transportation and the second coating process, which leads to changes in the coating structure and composition, seriously affecting the performance of the composite copper foil.

[0025] Based on this, the utility model provides an anti-oxidation device for composite copper foil production, such as Figure 1 As shown, it includes a cavity unit, and the cavity unit includes an upper cavity 1 and a lower cavity 2. Figure 1 and Figure 2 As shown, the two surfaces of the upper cavity 1 and the lower cavity 2 that contact each other (i.e., the bottom surface of the upper cavity 1 and the top surface of the lower cavity 2) are respectively provided with reserved holes 3 for placing the unwinding shaft of the water electroplating equipment, as shown in FIG. Figure 1 and Figure 2 As shown, the reserved holes 3 are arranged on the left and right sides of the cavity unit; Figure 1 As shown, the upper cavity 1 is provided with a film outlet 4, the length of the film outlet 4 is 1400 mm, and the width is 3 mm, which size is compatible with the size of the polypropylene magnetron film roll; further, the cavity unit is also provided with an air filling port 5 and an exhaust port (existing technology, not shown in the figure), as shown in FIG. Figure 1 As shown, the inflation port 5 is arranged at the top of the upper cavity 1, and the exhaust port can be arranged on the upper cavity 1 or the lower cavity 2. The inflation port 5 is connected to an inflation device, such as an air pump or other prior art. Figure 1 and Figure 2 As shown, the rear parts of the upper cavity 1 and the lower cavity 2 are hinged to each other by hinges, and the front sides of the upper cavity 1 and the lower cavity 2 are open sides. In order to fix the open sides of the upper cavity 1 and the lower cavity 2, the open sides of the upper cavity 1 and the lower cavity 2 are connected by snaps (existing technology, not shown in the figure).

[0026] Working principle: Place the polypropylene magnetron film roll on the unwinding shaft of the water electroplating equipment, and then install the cavity unit to both ends of the water electroplating unwinding equipment. After the installation is completed, open the opening sides of the upper and lower cavities 2, and place the two ends of the unwinding shaft of the water electroplating equipment respectively. Figure 1 The two reserved holes 3 shown in FIG. Figure 2 As shown, the unwinding shaft passes through the film outlet 4 of the cavity unit and is connected to the traction roller of the unwinding winding system of the water electroplating equipment. After the film surface runs smoothly, the cavity unit is closed and then the buckle is locked. Finally, antioxidant gas (nitrogen, argon, etc.) is filled into the cavity through the inflation port 5. This is a prior art and is not shown in the figure.

[0027] By setting up an anti-oxidation gas, the air in the cavity unit can be discharged, thereby effectively preventing the polypropylene magnetron film roll from coming into contact with the air and being oxidized, thereby effectively overcoming the technical defect in the prior art that the base film after magnetron treatment often has a film surface oxidation problem during the second coating process, which leads to changes in the coating structure and composition, seriously affecting the performance of the composite copper foil.

[0028] In addition, during actual transportation, the air in the cavity unit is discharged by the inflation device, thereby effectively preventing the polypropylene magnetron film roll from coming into contact with the air and being oxidized, thereby effectively ensuring the performance of the composite copper foil.

[0029] Furthermore, since the upper cavity 1 and the lower cavity 2 are not absolutely sealed, it is difficult to seal the surfaces where the two are in contact with each other. In order to improve the sealing performance on the surfaces where the upper cavity 1 and the lower cavity 2 are in contact with each other, based on Example 1, sealing strips are provided on the surfaces where the upper cavity 1 and the lower cavity 2 are in contact with each other. By providing the sealing strips, the sealing strips can be squeezed when the upper cavity 1 and the lower cavity 2 are closed, thereby improving the sealing performance of the cavity unit.

[0030] Furthermore, in the second coating process of the polypropylene magnetron film roll, the polypropylene magnetron film roll rotates on the water electroplating unwinding roller. After the film surface enters the first traction roller (existing technology) of the unwinding winding system of the water electroplating equipment, the diameter of the polypropylene magnetron film roll decreases with time during the operation of the equipment, resulting in a change in the angle between the unwinding roller and the film surface of the first guide roller 7 of the unwinding winding system of the water electroplating equipment, thereby affecting the stability and quality of the coating. Based on this, Figure 2 As shown, a guide roller 7 is provided at the top of the upper cavity 1, and the guide roller 7 is fixed on the upper cavity 1 through a fixed base. In this scheme, by providing the guide roller 7, the angle between the film surface of the polypropylene magnetron film roll and the first traction roller of the unwinding and winding system of the water electroplating equipment can be kept unchanged after the film roll is guided by the guide roller 7.

[0031] Furthermore, the cavity unit is made of polypropylene material, which can adapt to a long-term acidic environment.

[0032] In the description of this patent, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "longitudinal", "horizontal" and the like indicate the orientation or position relationship based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing this patent and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of this patent.

Claims

1. An anti-oxidation device for composite copper foil production, comprising a cavity unit, characterized in that: The cavity unit comprises an upper cavity (1) and a lower cavity (2); the surfaces of the upper cavity (1) and the lower cavity (2) that contact each other are respectively provided with reserved holes (3) for placing the unwinding shaft of the water electroplating equipment; the upper cavity (1) is provided with a film outlet (4); and the cavity unit is also provided with an air filling port (5) and an air exhaust port.

2. The anti-oxidation device for composite copper foil production according to claim 1, characterized in that: The upper cavity (1) and the lower cavity (2) are hinged to each other.

3. The anti-oxidation device for composite copper foil production according to claim 2, characterized in that: The opening sides of the upper cavity (1) and the lower cavity (2) are connected by snap fastening.

4. The anti-oxidation device for composite copper foil production according to claim 1, characterized in that: Sealing strips are provided on the surfaces of the upper cavity (1) and the lower cavity (2) that are in contact with each other.

5. The anti-oxidation device for composite copper foil production according to claim 1, characterized in that: A guide roller (7) is provided at the top end of the upper cavity (1).

6. The anti-oxidation device for composite copper foil production according to claim 1, characterized in that: The cavity unit is made of polypropylene.

7. The anti-oxidation device for composite copper foil production according to claim 1, characterized in that: The film outlet (4) is 1400 mm long and 3 mm wide.

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