Copper foil corrosion equipment

Abstract

The utility model discloses copper foil corrosion equipment which comprises an unwinding mechanism, a first pickling tank, a spraying mechanism, a corrosion tank, a second pickling tank, a rinsing tank, a passivating mechanism, a drying oven and a winding mechanism, weak acid liquid is placed in the first pickling tank and the second pickling tank, strong acid liquid is placed in the corrosion tank, the unwinding mechanism is used for unwinding copper foil, and the spraying mechanism is used for spraying the copper foil. The unwound copper foil sequentially passes through the first pickling tank, the spraying mechanism, the corrosion tank, the second pickling tank, the water washing tank, the passivation mechanism and the drying oven, and the winding mechanism is used for winding the copper foil dried by the drying oven. According to the copper foil corrosion equipment disclosed by the utility model, the copper foil is pretreated by weak acid and then is corroded by strong acid, so that the copper foil can be prevented from generating violent reaction after directly entering the strong acid; the surface of the copper foil is corroded, so that the thickness of the copper foil can be reduced, the service life of the copper foil is prolonged, and the application reliability of the copper foil in various fields is improved.

Description

Technical Field

[0001] This utility model relates to the field of copper foil processing technology, specifically to a copper foil etching device. Background Technology

[0002] With the rapid development of the electronics and information industry, copper has become increasingly important as a key basic material. The reduction in the thickness of copper foil is beneficial for improving the energy density and safety performance of lithium-ion batteries, and can also increase the processing fees and added value of copper foil companies, making it one of the important trends in the development of lithium-ion battery materials.

[0003] The reduction of copper foil thickness is mainly achieved through etching processes, which involve acid pickling to remove the oxide layer on the surface of the rolled copper foil and to activate the copper foil surface. However, the existing technology uses strong acid to pickle the copper foil, which can cause violent reactions, leading to problems such as excessive corrosion and uneven thickness, and can also cause safety risks. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a copper foil etching device. The copper foil is first pretreated with a weak acid and then etched with a strong acid. This can prevent the copper foil from reacting violently when it is directly exposed to the strong acid. By etching the surface of the copper foil, the thickness of the copper foil can be reduced and its service life can be extended, thereby improving its reliability in various fields.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A copper foil etching device includes an unwinding mechanism, a first pickling tank, a spraying mechanism, an etching tank, a second pickling tank, a washing tank, a passivation mechanism, an oven, and a winding mechanism. The first and second pickling tanks contain weak acid solutions, and the etching tank contains strong acid solutions. The unwinding mechanism is used to unwind the copper foil. The unwound copper foil sequentially passes through the first pickling tank, the spraying mechanism, the etching tank, the second pickling tank, the washing tank, the passivation mechanism, and the oven. The winding mechanism is used to wind up the copper foil after it has been dried in the oven.

[0007] As a further improvement to the above technical solution, a first roller assembly is provided in both the first pickling tank and the second pickling tank. The first roller assembly includes a first upper roller and a first lower roller, which are arranged in an alternating manner. The liquid level of the weak acid solution in the first pickling tank and the second pickling tank is lower than the top of the first upper roller.

[0008] As a further improvement to the above technical solution, the spraying mechanism includes a liquid storage tank and a spray pipe, the spray pipe being used to spray water onto the copper foil after it has been treated in the first pickling tank for cleaning.

[0009] As a further improvement to the above technical solution, the water washing tank is used to rinse the copper foil treated in the second pickling tank with clean water. The water washing tank contains water and is equipped with a second roller assembly. The second roller assembly includes a second upper roller and a second lower roller, which are arranged in an alternating manner. The water level in the water washing tank is lower than the top of the second upper roller.

[0010] As a further improvement to the above technical solution, a third roller assembly is provided in the corrosion tank. The third roller assembly includes a third upper roller and a third lower roller, which are arranged in an alternating manner. The liquid level of the strong acid in the corrosion tank is lower than the top of the third upper roller.

[0011] As a further improvement to the above technical solution, the passivation mechanism includes a passivation tank and a passivation liquid disposed in the passivation tank. A fourth upper roller and a fourth lower roller are disposed in the passivation tank. After the copper foil is conveyed by the fourth upper roller, it is immersed in the passivation liquid. The lower roller is used to support the copper foil. The liquid level of the passivation liquid is lower than the top of the fourth upper roller. A clamping roller is disposed in the passivation tank. The clamping roller is used to provide traction force to drive the copper foil conveyor.

[0012] As a further improvement to the above technical solution, the oven is equipped with a mesh nozzle and an oven roller, the mesh nozzle being used to provide hot air to the copper foil.

[0013] As a further improvement to the above technical solution, the unwinding mechanism includes an unwinding shaft, a tension roller, and a swing roller. The unwinding shaft is used for unwinding the copper foil, the tension roller is used for detecting tension fluctuations in the copper foil conveyor belt, and the swing roller is used for adjusting the copper foil tension.

[0014] As a further improvement to the above technical solution, the winding mechanism includes a winding shaft, a third tension roller, a third swing roller, and a flat push roller. The third tension roller is used to detect tension fluctuations in the copper foil feed, the third swing roller is used to adjust the copper foil tension, and the flat push roller is used to press the winding shaft to wind the copper foil.

[0015] As a further improvement to the above technical solution, the copper foil etching equipment includes several adsorption rollers and several deflecting rollers. The adsorption rollers are used to provide traction force to drive the copper foil conveyor belt, and the deflecting rollers are used to guide the copper foil conveyor belt to change direction.

[0016] The beneficial effects of this invention are as follows: First, the copper foil is pretreated with a weak acid, and then it is corroded with a strong acid. This prevents the copper foil from reacting violently when it is directly exposed to the strong acid. Finally, the copper foil is pickled with a weak acid to remove oxidation, preventing copper oxide from being mixed into the copper foil and entering subsequent processes. Thus, by using the equipment of this invention to corrode the copper foil, the thickness of the copper foil can be reduced, the service life of the copper foil can be extended, and its reliability in various fields can be improved. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of a copper foil etching device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the unwinding mechanism in a copper foil etching device according to an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the first pickling tank in a copper foil etching device according to an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the spraying mechanism in a copper foil etching device according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of an etching tank in a copper foil etching device according to an embodiment of this utility model;

[0023] Figure 6 This is a schematic diagram of the second pickling tank in a copper foil etching device according to an embodiment of this utility model;

[0024] Figure 7 This is a schematic diagram of a water washing tank in a copper foil etching device according to an embodiment of this utility model;

[0025] Figure 8 This is a schematic diagram of the passivation mechanism in a copper foil etching device according to an embodiment of this utility model;

[0026] Figure 9 This is a schematic diagram of an oven in a copper foil etching device according to an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the winding mechanism in a copper foil etching device according to an embodiment of this utility model.

[0028] Reference numerals: 1. Unwinding mechanism; 101. Unwinding shaft; 102. First tension roller A; 103. First swing roller; 104. First tension roller B; 2. First pickling tank; 201. First weak acid solution; 202. First lower layer roller A; 203. First upper layer roller A; 3. Spraying mechanism; 301. Storage tank; 302. Spray pipe; 4. Corrosion tank; 401. Strong acid solution; 402. Third lower layer roller; 403. Third upper layer roller; 404. Fourth tension roller; 5. Second pickling tank; 501. Second weak acid solution; 502. First lower layer roller B 503, First upper layer roller B; 6, Washing tank; 601, Water; 602, Second lower layer roller; 603, Second upper layer roller; 604, Third tension roller; 7, Passivation mechanism; 701, Passivation liquid; 702, Fourth lower layer roller; 703, Fourth upper layer roller; 704, Clamping roller; 8, Drying oven; 801, Drying oven roller; 9, Rewinding mechanism; 901, Rewinding shaft; 902, Flat push pressure roller; 903, Second tension roller A; 904, Second tension roller B; 905, Second swing roller; 10, Copper foil; 11, Adsorption roller; 12, Deflecting roller. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / installations can use accessories such as screws and bolts, or can be directly connected by welding, bonding, etc. The various technical features in this utility model can be combined interactively without contradicting each other.

[0030] Reference Figure 1 This utility model provides a copper foil 10 etching device, including an unwinding mechanism 1, a first pickling tank 2, a spraying mechanism 3, an etching tank 4, a second pickling tank 5, a water washing tank 6, a passivation mechanism 7, an oven 8, and a winding mechanism 9. The first pickling tank 2 and the second pickling tank 5 are filled with weak acid solution, and the etching tank 4 is filled with strong acid solution 401. The copper foil 10 is unwound by the unwinding mechanism 1, and then sequentially passes through the first pickling tank 2, the spraying mechanism 3, the etching tank 4, the second pickling tank 5, the water washing tank 6, the passivation mechanism 7, and the oven 8. Finally, the finished product is wound up by the winding mechanism 9.

[0031] It can be understood that the copper foil 10 first enters the first pickling tank 2 for weak acid immersion as a pretreatment. The pretreated copper foil 10 then enters the corrosion tank 4 for strong acid corrosion. This avoids the copper foil 10 from directly entering the strong acid and causing a violent reaction. This improves the quality of the copper foil 10 while reducing its thickness during corrosion treatment, extends its service life, and enhances its reliability in various fields.

[0032] In this embodiment, refer to Figure 2 The unwinding mechanism 1 includes an unwinding shaft 101, a deflecting roller 12, an adsorption roller 11, a first tension roller, and a first swing roller 103. The unwinding shaft 101 is used for unwinding the copper foil 10. The first tension roller includes a first tension roller A102 and a first tension roller B104. The first tension roller A102 is disposed between the winding shaft 901 and the adsorption roller 11 to detect tension fluctuations of the copper foil 10 from the unwinding shaft 101 to the adsorption roller 11. The tension is adjusted by the first swing roller 103, which can effectively absorb the tension fluctuations of the copper foil 10. The first tension roller B104 is disposed between the adsorption roller 11 and the first pickling tank 2 to detect the tension of the copper foil 10 coming out of the unwinding mechanism 1.

[0033] In this embodiment, refer to Figure 3 and Figure 6 The first pickling tank 2 and the second pickling tank 5 are each provided with a first roller assembly. The first roller assembly includes a first upper roller and a first lower roller, and the first upper roller and the first lower roller are arranged in an alternating manner. This arrangement allows the copper foil 10 to be immersed in the weak acid solution for cleaning.

[0034] For easy distinction, the weak acid solution in the first pickling tank 2 is marked as the first weak acid solution 201, and the weak acid solution in the second pickling tank 5 is marked as the second weak acid solution 501. The first roller assembly of the first pickling tank 2 includes a first upper roller A203 and a first lower roller A202, and the first roller assembly of the second pickling tank 5 includes a first upper roller B503 and a first lower roller B502.

[0035] Preferably, the liquid level of the first weak acid liquid 201 is lower than the top of the first upper roller A203. Similarly, the liquid level of the second weak acid liquid 501 is lower than the top of the first upper roller B503. In this way, the weak acid liquid does not completely submerge the first upper roller, thereby avoiding the formation of a steam trap on the surface of the copper foil 10 that cannot be discharged, and preventing crystallization on the inner side of the copper foil 10.

[0036] In this embodiment, refer to Figure 4The spraying mechanism 3 includes a storage tank 301 and a spray pipe 302. The spray pipe 302 is used to spray water onto the copper foil 10 after it has been treated in the first pickling tank 2, thereby cleaning away the copper salt and acid (e.g., if the weak acid in the first pickling tank 2 is sulfuric acid, then the copper salt is copper sulfate) on the surface of the copper foil 10, preventing crystal formation on the surface of the copper foil 10. The waste liquid after cleaning enters the storage tank 301 below for collection.

[0037] Reference Figure 7 The washing tank 6 contains water 601. Copper foil 10 exiting the second pickling tank 5 enters the washing tank 6, meaning the washing tank 6 is used to rinse the copper foil 10 treated in the second pickling tank 5 with clean water. This water rinsing of the copper foil 10 after weak acid cleaning removes copper sulfate and acid from the surface of the copper foil 10, preventing crystal formation on the surface. The washing tank 6 is equipped with a second roller assembly, which includes a second upper roller 603 and a second lower roller 602, arranged in an alternating pattern. The water level of the washing tank 6 is lower than the top of the second upper roller 603, so that the water 601 does not completely submerge the second upper roller 603, preventing the formation of air pockets on the surface of the copper foil 10 that cannot be discharged, and preventing crystal formation on the inside of the copper foil 10.

[0038] Furthermore, since the washing tank 6 is located in the middle of the entire copper foil 10 etching equipment, a third tension roller 604 is provided in the washing tank 6 to detect tension fluctuations of the copper foil 10 and ensure the normal feeding of the copper foil 10.

[0039] In this embodiment, refer to Figure 5 The corrosion tank 4 is equipped with a third roller assembly, which includes a third upper roller 403 and a third lower roller 402. The third upper roller 403 and the third lower roller 402 are arranged in an alternating manner. The liquid level of the strong acid liquid 401 in the corrosion tank 4 is lower than the top of the third upper roller 403. After the copper foil 10 is washed by the spraying mechanism 3, it enters the strong acid for corrosion. The liquid level of the strong acid does not completely submerge the third upper roller 403, thereby preventing the formation of vapor pockets on the surface of the copper foil 10 that cannot be discharged, and at the same time preventing crystallization on the inner side of the copper foil 10.

[0040] Furthermore, the tension fluctuation of the copper foil 10 in the corrosion tank 4 is detected by the fourth tension roller 404 installed in the corrosion tank 4 to ensure the normal conveying of the copper foil 10 during the corrosion process.

[0041] In this embodiment, refer to Figure 8The passivation mechanism 7 includes a passivation tank and a passivation liquid 701 disposed within the passivation tank. A fourth upper roller 703 and a fourth lower roller 702 are disposed within the passivation tank. After passing through the fourth upper roller 703, the copper foil 10 is immersed in the passivation liquid 701, thereby passivating the surface of the copper foil 10 after washing in the water washing tank 6. This prevents the copper foil 10 from contacting oxygen, water 601, acids, etc., in the external environment, thus preventing oxidation reactions and maintaining the surface smoothness and electrical properties of the copper foil 10. The lower roller supports the copper foil 10, ensuring its normal movement within the passivation liquid 701. The liquid level of the passivation liquid 701 is lower than the top of the fourth upper roller 703, preventing the formation of air pockets on the surface of the copper foil 10 that cannot be discharged, and also preventing crystallization on the inner side of the copper foil 10.

[0042] Furthermore, the passivation groove is provided with a clamping roller 704, which is used to provide traction force to drive the copper foil 10 to move. Specifically, the clamping roller 704 includes a traction roller and a pressure roller. The traction roller and the pressure roller interact to provide traction force for the copper foil, wherein the traction roller is connected to the drive device and the pressure roller is the driven roller.

[0043] In this embodiment, refer to Figure 9 The oven 8 is equipped with a mesh nozzle (not shown in the figure) and an oven roller 801. The mesh nozzle is used to provide hot air to blow onto the copper foil 10. The temperature of the hot air is controlled at about 75°C to dry the passivated copper foil 10.

[0044] In this embodiment, refer to Figure 10 The winding mechanism 9 includes a winding shaft 901, a deflecting roller 12, an adsorption roller 11, a second tension roller, a second swing roller 905, and a flat press roller 902. The second tension roller includes a second tension roller A903 and a second tension roller B904. The second tension roller A903 is positioned between the drying oven 8 and the adsorption roller 11 to detect tension fluctuations in the copper foil 10 exiting the drying oven 8. The second tension roller B904 is positioned between the adsorption roller 11 and the winding shaft 901 to detect tension fluctuations in the section of copper foil 10 from the adsorption roller 11 to the winding shaft 901. Tension adjustment is achieved through the second swing roller 905, effectively absorbing tension fluctuations in the copper foil 10. The flat press roller 902 presses against the winding shaft 901 to wind the copper foil 10, ensuring stable winding operations.

[0045] In this embodiment, refer to Figures 2-9The unwinding mechanism 1, the first pickling tank 2, the spraying mechanism 3, the second pickling tank 5, the washing tank 6, and the winding mechanism 9 are all equipped with adsorption rollers 11. The unwinding mechanism 1, the first pickling tank 2, the spraying mechanism 3, the etching tank 4, the second pickling tank 5, the washing tank 6, the passivation mechanism 7, and the winding mechanism 9 are all equipped with deflecting rollers 12. The adsorption rollers 11 are used to provide traction force to drive the copper foil 10 to travel, and the deflecting rollers 12 are used to guide the deflection of the copper foil 10.

[0046] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A copper foil etching device, characterized in that: The system includes an unwinding mechanism, a first pickling tank, a spraying mechanism, an etching tank, a second pickling tank, a washing tank, a passivation mechanism, an oven, and a winding mechanism. The first and second pickling tanks contain weak acid solutions, and the etching tank contains strong acid solutions. The unwinding mechanism is used to unwind the copper foil. After unwinding, the copper foil passes through the first pickling tank, the spraying mechanism, the etching tank, the second pickling tank, the washing tank, the passivation mechanism, and the oven in sequence. The winding mechanism is used to wind up the copper foil after it has been dried in the oven.

2. The copper foil etching equipment according to claim 1, characterized in that: Both the first pickling tank and the second pickling tank are equipped with a first roller assembly. The first roller assembly includes a first upper roller and a first lower roller, which are arranged in an alternating manner. The liquid level of the weak acid solution in the first pickling tank and the second pickling tank is lower than the top of the first upper roller.

3. The copper foil etching equipment according to claim 2, characterized in that: The spraying mechanism includes a liquid storage tank and a spray pipe, which is used to spray water onto the copper foil after it has been treated in the first pickling tank for cleaning.

4. The copper foil etching equipment according to claim 2, characterized in that: The water washing tank is used to rinse the copper foil treated in the second pickling tank with clean water. The water washing tank contains water and is equipped with a second roller assembly. The second roller assembly includes a second upper roller and a second lower roller, which are arranged in an alternating manner. The water level in the water washing tank is lower than the top of the second upper roller.

5. The copper foil etching equipment according to claim 1, characterized in that: The corrosion tank is equipped with a third roller assembly, which includes a third upper roller and a third lower roller. The third upper roller and the third lower roller are arranged in an alternating manner. The liquid level of the strong acid in the corrosion tank is lower than the top of the third upper roller.

6. The copper foil etching equipment according to claim 1, characterized in that: The passivation mechanism includes a passivation tank and a passivation liquid disposed in the passivation tank. A fourth upper roller and a fourth lower roller are disposed in the passivation tank. After the copper foil is conveyed by the fourth upper roller, it is immersed in the passivation liquid. The lower roller is used to support the copper foil. The liquid level of the passivation liquid is lower than the top of the fourth upper roller. A clamping roller is disposed in the passivation tank. The clamping roller is used to provide traction force to drive the copper foil conveyor.

7. The copper foil etching equipment according to claim 1, characterized in that: The oven is equipped with a mesh nozzle and an oven roller, and the mesh nozzle is used to provide hot air to the copper foil.

8. The copper foil etching equipment according to claim 1, characterized in that: The unwinding mechanism includes an unwinding shaft, a tension roller, and a swing roller. The unwinding shaft is used for unwinding the copper foil, the tension roller is used for detecting tension fluctuations in the copper foil conveyor belt, and the swing roller is used for adjusting the copper foil tension.

9. The copper foil etching equipment according to claim 1, characterized in that: The winding mechanism includes a winding shaft, a third tension roller, a third swing roller, and a flat push roller. The third tension roller is used to detect tension fluctuations in the copper foil feed, the third swing roller is used to adjust the copper foil tension, and the flat push roller is used to press the winding shaft to wind the copper foil.

10. A copper foil etching device according to any one of claims 1-9, characterized in that: The copper foil etching equipment includes several adsorption rollers and several deflecting rollers. The adsorption rollers are used to provide traction to drive the copper foil conveyor belt, and the deflecting rollers are used to guide the copper foil conveyor belt to change direction.

Images