CN115787028A - A method of manufacturing porous copper foil and its special equipment - Google Patents

Abstract

The invention discloses a manufacturing method of porous copper foil, relates to the technical field of porous copper foil preparation, and comprises the following steps: raw material arrangement, electrolytic oxidation, secondary electrolysis, cleaning and drying, and slurry coating. The invention also discloses a special equipment for manufacturing porous copper foil, which includes a supporting component, an electrolytic component, a cleaning component and a coating component. In the present invention, through the electrolytic oxidation treatment of the raw copper foil, a plurality of micropores are formed on the surface of the raw copper foil after electrolysis, and the raw copper foil is electrolyzed twice, so that the number of micropores on the surface of the copper foil can be ensured. The copper foil is cleaned, and then the cleaned copper foil is coated with slurry. Since the surface of the copper foil has micropores, the slurry can be well attached to the surface of the copper foil, thereby solving the problem of easy coating on the surface of the copper foil. Dropping and poor adhesion to copper foil.

Description

A method of manufacturing porous copper foil and its special equipment

technical field

The invention relates to the technical field of porous copper foil preparation, in particular to a method for manufacturing porous copper foil and special equipment thereof.

Background technique

The positive electrode material of the lithium battery current collector is generally aluminum foil, and the negative electrode material is generally copper foil. The prepared aluminum foil or copper foil is coated with polymer slurry by a coating device, and then dried and cut to obtain the corresponding current collector. Material. In order to improve the stability of the polymer slurry on the aluminum foil or copper foil, and then improve the performance of the lithium battery, the copper foil is often treated with electrolysis to make it have a porous structure. The copper foil with a porous structure has a larger surface area. On the one hand, more polymer slurry can be attached when coating the polymer slurry, thereby improving the performance of the battery; on the other hand, the pores above it can connect both sides of the copper foil. The coated polymer slurry improves the adhesion of the polymer slurry on the copper foil, thereby improving the stability of the lithium battery.

The Chinese patent application number 2018114689605 discloses a preparation technology of porous copper foil for negative electrodes of lithium-ion batteries. The porous structure is obtained on the copper foil by chemical etching, and a number of holes are formed on the polymer insulating film through the thickness of the film. A perforated film is wrapped on the surface of a titanium cathode roll, which is immersed in the electrolyte tank; the copper foil is passed around the surface of the titanium cathode roll, and the titanium cathode roll rotates to make the copper foil move continuously, and at the same time, the copper foil and titanium A pulse voltage is applied between the cathode rollers, the copper foil is the positive pole, and the titanium cathode roller is the negative pole; under the action of the electrolyte, the copper foil is partially discharged, and the copper foil at the position corresponding to the hole of the insulating film dissolves, forming an insulating layer on the copper foil. The uniform distribution of pores in the porous structure of the film; after cleaning with deionized water, a porous copper foil is obtained.

The above copper foil preparation scheme only considers the uniformity of the corrosion current on the surface of the copper foil, and has not considered the porous structure of the micropores on the copper foil and whether the pores penetrate the copper foil, so as to ensure that when the copper foil is coated subsequently The polymer slurry on both sides of the copper foil can be bonded to each other through the pores to improve the performance of the lithium battery. And there is no corresponding technical solution for the cleaning, drying and coating of the polymer slurry after the electrolytic corrosion of the copper foil.

Therefore, it is necessary to propose a manufacturing method of porous copper foil and its special equipment to solve the above technical problems.

Contents of the invention

The object of the present invention is to provide a method for manufacturing porous copper foil and its special equipment, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a method for manufacturing porous copper foil, comprising the following steps:

Step 1. Raw material arrangement, select flat copper foil as the raw material base material for the preparation of porous copper foil, and the raw material copper foil is wound up on the winding roller;

Step 2, electrolytic oxidation, using the inert material as the cathode and the raw copper foil as the anode, electrolyzing the raw copper foil;

Step 3, secondary electrolysis, the raw copper foil after electrolysis is separated from the electrolyte, the separated raw copper foil stops reacting during the transportation process, and then enters the electrolyte for secondary electrolysis;

Step 4, cleaning and drying, using clean water to rinse the surface of the electrolyzed copper foil to remove impurities generated during the electrolysis process, and then drying the cleaned copper foil;

Step 5, slurry coating, using a coating component to coat the slurry on the surface of the copper foil;

Step 6, drying and cutting the slurry-coated copper foil.

A special equipment for manufacturing porous copper foil. The special equipment adopts the manufacturing method of porous copper foil to manufacture porous copper foil, including supporting components, electrolytic components, cleaning components and coating components;

The support assembly includes a fixed box, an electrolyte is provided in the fixed box, and a water guide box is fixedly connected to one side of the fixed box;

The electrolytic assembly includes a movable frame, and the movable frame is located in a fixed box;

The cleaning assembly includes two symmetrically distributed fixed frames, the middle part of the outer side of the fixed frame is fixedly connected with the top end of the inner side wall of the water guide box;

The coating assembly includes two symmetrically distributed support arms, a support rod is fixedly connected to the middle part of one side of the support arms, and one end of the support rod is fixedly connected to the top end of the outer surface of the water guide box.

Preferably, one side of the fixed box is fixedly connected with two symmetrically distributed support plates, the inner side of the support plate is movably connected with a discharge roller through a bearing, and the inner wall of the bottom end of the fixed box is fixedly connected with a fixed seat, The fixing seat is configured as a boss-shaped structure, and the middle parts of both sides of the fixing seat are fixedly connected with a fixing plate, and the outer surface of the fixing plate is inlaid with a plurality of graphite electrodes distributed at equal intervals.

Preferably, the middle parts of both sides of the movable frame are fixedly connected with two symmetrically distributed decks, and the decks are clamped and connected with the top of the fixed box, and the tops of both sides of the movable frame are movably connected with bearings. As for the guide roller, the bottom ends on both sides of the movable frame are movably connected with two reversing rollers through bearings.

Preferably, the middle part of the inner side of the movable frame is fixedly connected with a fixed frame, and the fixed frame is set as a "∩"-shaped structure, and the four corners of the bottom end of the fixed frame are fixedly connected with extension plates, and the extension plates are set as The inclined structure, the bottom end of the inner surface of the extension plate is movably connected with movable rollers through bearings, the middle parts of both sides of the fixed frame are provided with intubation tubes, and the inside of the intubation tubes is plugged and connected with inserting plates. The board is set as a "∩" shaped structure.

Preferably, the top inner wall of the flashboard is movably connected to the upper surface of the fixing frame through a spring, the bottom end of the inner side of the flashboard is fixedly connected with a conductive column, and the middle part of the upper surface of the conductive column is inlaid with an electrode piece, so The electrode sheet is arranged in a "convex" shape structure, and the material of the electrode sheet is graphite material, and both ends of the conductive column are fixedly connected with connecting wires.

Preferably, the inner middle part of the fixed frame is fixedly connected with a partition, the four corners of the inner surface of the fixed frame are movably connected with fixed rollers through bearings, and two sets of extension frames are fixedly connected on both sides of the fixed frame, The extension frame is arranged in a triangular structure, and one end of the inner surface of the extension frame is movably connected with a guide roller through a bearing.

Preferably, a water guide cover is fixedly connected to the middle part of the inner side of the extension frame on one side, and both ends of the water guide cover are set as inclined surfaces. The nozzles of each group of nozzles are equipped with a water collection assembly correspondingly at the water outlet of each group of nozzles. The water collection assembly includes a support roller. The outer periphery of the support roller is provided with a water absorption layer. There is a water storage tank under the water plate, and a flow sensor is installed on the diversion tube at the bottom of the water storage tank at the upper position corresponding to the upper water guide cover. The flow sensor can detect the flow of water in the diversion tube at the bottom of the water storage tank. The detected flow rate of the draft tube feeds back the number of micropores penetrating the copper foil produced after the copper foil is electrolyzed; the middle part of the outer surface of the fixed frame is fixedly connected with a water pump, and the output end of the water pump is fixedly connected with a water pipe. One end of the water pipe is located in the water guiding cover.

Preferably, an air guide cover is fixedly connected to the inner middle part of the extension frame on the other side, both ends of the air guide cover are set as inclined surfaces, and an exhaust fan is fixedly connected to the middle part of one side of the air guide cover, so Both ends of the air guide cover are provided with air outlet slots through the middle parts, and the air outlet slots are arranged in a strip structure.

Preferably, both ends of the inner surface of the support arm are movably connected with guide rollers through bearings, and two symmetrically distributed paint tanks are arranged in the middle of the inner side of the support arm. Both ends are fixedly connected with a connecting seat, and the connecting seat is fixedly connected with the support arm through bolts. A cavity is arranged inside the paint box, a coating roller is arranged at the top of the cavity, and a coating roller is arranged inside the cavity. Feeding roller, both ends of the coating roller and the feeding roller are flexibly connected to the inner wall of the cavity through bearings, the outer wall of the coating roller and the feeding roller are attached, and the top of the outer surface of the coating tank is inlaid There is a feeding tube.

Technical effect and advantage of the present invention:

1. The present invention carries out electrolytic oxidation treatment to the raw copper foil, and the raw copper foil produces a plurality of micropores on the surface after electrolysis, and the raw copper foil is electrolyzed twice, so that the number of micropores on the surface of the copper foil can be ensured, and through electrolysis The cleaned copper foil is cleaned, and then the cleaned copper foil is coated with slurry. Since the surface of the copper foil has micropores, the slurry can be well attached to the surface of the copper foil, thus solving the problem of coating the surface of the copper foil. The layer is easy to fall off and the adhesion to copper foil is poor;

2. In the present invention, by setting a cleaning component on one side of the electrolytic component, the cleaning component can clean and dry the copper foil after electrolysis, and by setting a coating component on one side of the cleaning component, the coating component can realize the slurry on the surface of the copper foil The coating of the material can realize the continuous processing of the raw copper foil, thereby improving the production efficiency of the porous copper foil;

3. Through the cooperation of the water collecting component and the nozzle, in addition to cleaning and flushing the accumulated water on the copper foil, the present invention can also detect the flow from the water diversion tube on the water collecting component through the flow sensor installed on one of the water collecting components. The flow rate of accumulated water in the water collection component, and then the flow rate through the diversion tube reflects the number of micropores penetrating the copper foil produced by electrolysis. When the flow sensor detects an abnormal flow value, it can trigger the alarm of the device The organization reminds production personnel to check the electrolysis current, electrolyte concentration, electrolysis time and other related factors in the electrolysis process to ensure the quality of electrolytic copper foil, which is of great significance to ensure the improvement of copper foil production quality.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a structural schematic diagram of the support assembly of the present invention.

Fig. 3 is a structural schematic diagram of the electrolytic assembly of the present invention.

Fig. 4 is a schematic front view of the structure of the electrolytic assembly of the present invention.

Fig. 5 is a schematic structural view of the fixing frame of the present invention.

Fig. 6 is a schematic diagram of the board structure of the present invention.

Fig. 7 is a schematic diagram of the positional relationship between the cleaning component and the coating component of the present invention.

Fig. 8 is a structural schematic diagram of the cleaning assembly of the present invention.

Fig. 9 is a schematic structural diagram of the water guiding cover of the present invention.

Fig. 10 is a schematic structural diagram of the wind guide cover of the present invention.

Fig. 11 is a schematic structural view of the coating assembly of the present invention.

Fig. 12 is a schematic structural view of the paint tank of the present invention.

Fig. 13 is a schematic sectional view of the structure of the paint tank of the present invention.

Fig. 14 is a schematic diagram of the conveying route of the raw material copper foil of the present invention.

Fig. 15 is a partial enlarged view of A in Fig. 14 of the present invention.

In the figure: 1. Support component; 2. Electrolysis component; 3. Cleaning component; 4. Coating component; 101, fixed box; 102, water guide tank; 103, support plate; 104, discharging roller; 106, fixed plate; 107, graphite electrode; 201, movable frame; 202, deck; 203, guide roller; 204, reversing roller; 205, fixed frame; 206, extension plate; 207, movable roller; 208, intubation ; Cover; 307, nozzle; 308, water pump; 309, water pipe; 310, wind guide cover; 311, exhaust fan; 312, air outlet groove; 313, water collection assembly; 3131, supporting roller; 3132, water-absorbing layer; 3133, scraping Water plate; 3134, water tank; 401, support arm; 402, support rod; 403, guide roller; 404, paint box; 405, connection seat; 406, cavity; 407, paint roller; 408, feeding roller; 409 , Feeding tube.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The invention provides a kind of manufacturing method of porous copper foil, comprises the following steps:

Step 1. Raw material arrangement, select flat copper foil as the raw material base material for the preparation of porous copper foil, and the raw material copper foil is wound up on the winding roller;

Step 2, electrolytic oxidation, using the inert material as the cathode and the raw copper foil as the anode, electrolyzing the raw copper foil;

Step 3, secondary electrolysis, the raw copper foil after electrolysis is separated from the electrolyte, the separated raw copper foil stops reacting during the transportation process, and then enters the electrolyte for secondary electrolysis;

Step 4, cleaning and drying, using clean water to rinse the surface of the electrolyzed copper foil to remove impurities generated during the electrolysis process, and then drying the cleaned copper foil;

Step 5, slurry coating, using a coating component to coat the slurry on the surface of the copper foil;

Step 6, drying and cutting the slurry-coated copper foil.

The present invention provides a special equipment for the manufacturing method of porous copper foil as shown in FIGS. As for the assembly 2 , a cleaning assembly 3 is provided on one side of the support assembly 1 , and a coating assembly 4 is provided on one side of the cleaning assembly 3 .

The support assembly 1 includes a fixed box 101, which is provided with an electrolyte, one side of the fixed box 101 is fixedly connected with a water guide box 102, and one side of the fixed box 101 is fixedly connected with two symmetrically distributed support plates 103, the support plate The inner side of 103 is movably connected with the discharge roller 104 through the bearing, and the bottom inner wall of the fixed box 101 is fixedly connected with the fixed seat 105, and the fixed seat 105 is set as a boss-shaped structure, and the middle parts of both sides of the fixed seat 105 are fixedly connected with the fixed plate 106 , the outer surface of the fixing plate 106 is inlaid with a plurality of graphite electrodes 107 distributed at equal intervals.

The electrolytic assembly 2 includes a movable frame 201, which is located in the fixed box 101, and the middle parts of both sides of the movable frame 201 are fixedly connected with two symmetrically distributed card holders 202, and the card holders 202 are clamped and connected with the top of the fixed box 101, The top ends of both sides of the movable frame 201 are movably connected with guide rollers 203 through bearings, the bottom ends of both sides of the movable frame 201 are movably connected with two reversing rollers 204 through bearings, and the inner middle part of the movable frame 201 is fixedly connected with a fixed frame 205 , the fixed frame 205 is set in a "∩"-shaped structure, and the four corners of the bottom end of the fixed frame 205 are fixedly connected with extension plates 206, and the extension plates 206 are set in an inclined structure.

Specifically, the bottom end of the inner surface of the extension plate 206 is movably connected with a movable roller 207 through a bearing, and the middle part of both sides of the fixed frame 205 is provided with an intubation tube 208. It is a "∩"-shaped structure, the top inner wall of the plug board 209 is flexibly connected to the upper surface of the fixed frame 205 through a spring, the bottom end of the inner side of the plug board 209 is fixedly connected with a conductive post 210, and the middle part of the upper surface of the conductive post 210 is embedded with an electrode sheet 211, and the electrode sheet 211 is set to a "convex" shape structure; in this way, it can be ensured that when the inserting plate 209 moves up and down relative to the fixed frame 205, it can drive the conductive column 210 and the electrode sheet 211 to move up and down, so that the electrode sheet 211 can be connected with the Here the copper foils are closely attached.

More specifically, the material of the electrode sheet 211 is graphite material, and when the raw copper foil passes through the two movable rollers 207, the conductive column 210 between the two movable rollers 207 moves upward under the action of the spring, and the conductive column 210 drives the electrode The sheet 211 moves upwards, so that the electrode sheet 211 contacts the raw copper foil, so that the raw copper foil is charged. Both ends of the conductive column 210 are fixedly connected with connecting wires 212, and the connecting wires 212 can be connected to the power supply for electrolysis.

The cleaning assembly 3 includes two symmetrically distributed fixed frames 301. The middle part of the outer surface of the fixed frame 301 is fixedly connected with the top of the inner wall of the water guide box 102. When the cleaning assembly 3 cleans the surface of the copper foil, the water used in the cleaning process falls into the water guide box 102, and then discharged through the water outlet provided at the bottom of the water guide box 102. The middle part of the inner side of the fixed frame 301 is fixedly connected with a partition 302, and the four corners of the inner side of the fixed frame 301 are movably connected with fixed rollers 303 through bearings. It is arranged as a triangular structure; specifically, one end of the inner surface of the extension frame 304 is movably connected with a guide roller 305 through a bearing, and the inner middle part of the extension frame 304 on one side of the fixed frame 301 is fixedly connected with a water guide cover 306, and the two ends of the water guide cover 306 They are all set as inclined surfaces. Both ends of the water guide cover 306 are inlaid with a plurality of nozzles 307 distributed at equal intervals. The middle part of the outer surface of the fixed frame 301 is fixedly connected with a water pump 308. The output end of the water pump 308 is fixedly connected with a water pipe 309. One end of the water pipe 309 is located in the water guiding cover 306 . As shown in Figure 14, the water outlet of each group of nozzles 307 is correspondingly provided with a water collection assembly 313, the water collection assembly 313 includes a support roller 3131, and the outer periphery of the support roller 3131 is provided with a water-absorbing layer 3132, and the water-absorbing layer 3132 is squeezed and contacted with a wiper blade 3133, below the wiper blade 3133, there is a water storage tank 3134, the water storage tank 3134 is funnel-shaped, in the process that the support roller 3131 drives the water absorption layer 3132 to rotate, the wiper blade 3133 can scrape off and guide the water absorbed from the water absorption layer 3132 In the water storage tank 3134, a flow sensor is provided on the guide tube at the bottom of the water storage tank 3134 at the upper position corresponding to the upper water guide cover 306. The fixed roller 303 at the lower position is also provided with a water collecting component 313 correspondingly, and the water collecting component 313 here is used to remove the accumulated water on the surface of the cleaned copper foil to prepare for the subsequent drying of the copper foil.

The inner middle part of the extension frame 304 on the other side of the fixed frame 301 is fixedly connected with an air guide cover 310, and the two ends of the air guide cover 310 are all arranged as inclined surfaces, and one side middle part of the air guide cover 310 is fixedly connected with an exhaust fan 311, and the air guide cover 310 is fixedly connected with an exhaust fan 311. The middle parts of both ends of the cover 310 are provided with air outlet slots 312 , and the air outlet slots 312 are arranged in a bar-shaped structure.

The raw copper foil passes through the cleaning assembly 3 under the action of the guide roller 305. At this time, the water pump 308 can be connected to the water tank to transport the flushing water under pressure to the water guide cover 306, and the water in the water guide cover 306 can be sprayed to the The surface of the raw copper foil, so that the surface of the raw copper foil can be cleaned, and the two sets of nozzles 307 can clean both sides of the copper foil. The water collecting assembly 313 corresponding to each group of nozzles 307 has the following functions: on the one hand, the support roller 3131 can support the copper foil washed by the nozzles 307, and prevent the nozzles 307 from spraying out while ensuring sufficient water pressure to rinse the copper foil. Excessive water pressure will affect the tension of the copper foil or cause the copper foil to tear and break. On the other hand, the water-absorbing layer 3132 provided on the support roller 3131 can not only buffer the copper foil in contact with it while it is in contact with the copper foil, but also absorb the accumulated water on the copper foil after washing. When 3131 drives the water-absorbing layer 3132 to rotate, the wiper 3133 squeezed and contacted with the water-absorbing layer 3132 can scrape off the flushing water absorbed by the water-absorbing layer 3132, and the scraped flushing water enters the lower part along the wiper 3133 In the water storage tank 3134, the accumulated water collected by the water storage tank 3134 is discharged through the guide tube at the bottom of the water storage tank 3134, so that by collecting and removing the accumulated water on the copper foil, it is ready for the subsequent rapid drying of the copper foil.

In particular, a flow sensor is provided on the guide tube at the bottom of the water storage tank 3134 at the upper position corresponding to the upper water guide cover 306. The support roller 3131, the water absorption layer 3132, the wiper blade 3133, and the water storage tank 3134 at this position are all except In addition to having the same function as above, the flow sensor provided on the guide tube at the bottom of the water storage tank 3134 at this position can detect the flow of water in the guide tube at the bottom of the water storage tank 3134 . The copper foil electrolyzed by the electrolysis module 2 can form a porous structure on the surface, and the micropores on the copper foil run through the copper foil. When the polymer slurry is subsequently coated, the polymer slurry on both sides of the copper foil can be connected through the micropores Together, it can improve the effect of the polymer on the copper foil, thereby improving the performance of the lithium battery. Therefore, the more the number of micropores penetrating the copper foil within a certain range, the more beneficial it is to improve the performance of the lithium battery. The micropores produced by electrolytic copper foil are directly related to factors such as the size of the electrolytic current, the concentration of the electrolyte, and the electrolysis time. When the above factors change, they can all affect the number of micropores penetrating the copper foil after electrolysis. The number of micropores in copper foil is of great significance to the production of high-quality copper foil. When the copper foil is electrolyzed by the electrolytic assembly 2 and is transported to the nozzle 307 at the upper position corresponding to the upper water guide cover 306, the corresponding supporting roller 3131 drives the water-absorbing layer 3132 to contact and support the copper foil; When the cleaning water rinses the copper foil, a part of the cleaning water with pressure can pass through the micropores to reach the water-absorbing layer 3132 on the other side of the copper foil and be absorbed by the water-absorbing layer 3132, and the cleaning water absorbed by the water-absorbing layer 3132 is absorbed by the water-absorbing layer 3132 is scraped off by the wiper blade 3133 during the rotation and guided into the water storage tank 3134. When the water storage tank 3134 discharges the accumulated water through the guide tube, the flow of the accumulated water can be detected by the flow sensor on the guide tube, so The flow rate of the draft tube that can be detected by the flow sensor reflects the number of micropores penetrating the copper foil produced after the copper foil is electrolyzed. During normal processing, the micropores penetrating the copper foil produced by electrolysis of the copper foil are relatively uniform, and when the flow rate of the diversion tube is lower than the normal flow rate, it means that the number of micropores penetrating the copper foil is reduced. When the flow rate is normal, it means that the number of micropores passing through the copper foil increases or the micropores become larger, which reflects that the electrolysis current or electrolyte concentration, electrolysis time and other factors have changed in the corresponding electrolysis process at this time. When the flow sensor detects an abnormal When the flow rate is high, the alarm mechanism of the device can be triggered to remind the production personnel to check the electrolysis current, electrolyte concentration, electrolysis time and other related factors in the electrolysis process to ensure the quality of the electrolytic copper foil, which is very important to ensure the improvement of copper foil production. quality is important.

After cleaning, the copper foil reaches one side of the air guide cover 310. At this time, the exhaust fan 311 draws the air into the hot air in the air guide cover 310, and the hot air in the air guide cover 310 reaches the surface of the copper foil through the air outlet groove 312. Thereby, the drying of the surface of the copper foil can be accelerated, so that the subsequent coating work can be carried out.

The coating assembly 4 includes two symmetrically distributed support arms 401, one side of the support arm 401 is fixedly connected with a support rod 402, one end of the support rod 402 is fixedly connected with the top end of the outer surface of the water guide box 102, and the inner surface of the support arm 401 Both ends are movably connected with guide rollers 403 through bearings, and two symmetrically distributed coating boxes 404 are arranged in the middle of the inner side of the support arm 401, and the two coating boxes 404 are respectively located on both sides of the copper foil, so as to realize the protection of both sides of the copper foil. Coating, when the copper foil only needs to be coated on one side, emptying one coating box 404 can realize single-piece coating of the copper foil.

Specifically, both ends of the two paint tanks 404 that are close to each other are fixedly connected with a connecting seat 405, and the connecting seat 405 is fixedly connected with the support arm 401 through bolts. The inside of the paint tank 404 is provided with a cavity 406, and the cavity 406 A coating roller 407 is arranged on the top, and a feeding roller 408 is arranged inside the cavity 406. The feeding roller 408 applies the slurry in the coating box 404 to the surface of the coating roller 407, and the coating roller 407 applies the slurry to the copper foil. The surface of the copper foil can be coated with slurry on the surface of the copper foil.

More specifically, the two ends of the coating roller 407 and the feeding roller 408 are movably connected to the inner wall of the cavity 406 through bearings, the outer side walls of the coating roller 407 and the feeding roller 408 are attached, and the top of the outer surface of the coating box 404 A feeding pipe 409 is inlaid, and the setting of the feeding pipe 409 facilitates the addition of slurry.

When the device performs electrolytic oxidation treatment on the raw material copper foil, the raw material copper foil on the discharge roller 104 can be pulled by the traction mechanism external to the device, and the raw material copper foil enters the fixed box 101 through the guide roller 203 and the reversing roller 204 in sequence At this time, the graphite electrode 107 in the fixed box 101 is connected to the external power supply, and the graphite electrode 107 is used as the cathode, and when the raw copper foil passes through the two reversing rollers 204, the conductive column 210 between the two reversing rollers 204 is in the spring The conductive column 210 drives the electrode sheet 211 to move upward, so that the electrode sheet 211 is in contact with the raw copper foil, so that the raw copper foil is charged. At this time, the raw copper foil is used as an anode, and the fixed box 101 is provided with an electrolyte , A current path is formed between the raw copper foil, the electrolyte and the graphite electrode 107 to realize the electrolytic treatment of the raw copper foil.

When the device cleans the electrolyzed raw copper foil, the electrolyzed raw copper foil enters the cleaning assembly 3 through the fixed roller 303, and the raw copper foil passes through the cleaning assembly 3 under the action of the guide roller 305. At this time, the water pump 308 can The water tank is externally connected, and the flushing water with pressure is delivered to the water guide cover 306, and the water in the water guide cover 306 can be sprayed to the surface of the raw copper foil through the nozzle 307, so that the surface of the raw copper foil can be cleaned, and the two The group of nozzles 307 can clean both sides of the copper foil. The cleaned copper foil reaches one side of the air guide cover 310. At this time, the exhaust fan 311 extracts the hot air into the air guide cover 310, and the hot air in the air guide cover 310 reaches the surface of the copper foil through the air outlet groove 312, thereby speeding up the process. The surface of copper foil is dry for subsequent coating work.

When the device coats the copper foil with slurry, the dried copper foil passes through the guide roller 403 and reaches between the two coating rollers 407, the copper foil moves through the action of the traction mechanism, and the copper foil drives the two coating rollers through friction 407 rotates, and the coating roller 407 can drive the feeding roller 408 to rotate, and the feeding roller 408 applies the slurry in the coating box 404 to the surface of the coating roller 407, and the coating roller 407 applies the slurry to the surface of the copper foil. The coating of the slurry on the surface of the copper foil is realized. After the slurry coating is completed, the drying, cutting and other processes are carried out, and finally the copper foil product is obtained.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some of the technical features may be replaced equivalently, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (10)

1. A method for manufacturing a porous copper foil, characterized by comprising the steps of:

step one, raw material arrangement, namely selecting a flat copper foil as a raw material substrate to prepare a porous copper foil, and winding the raw material copper foil on a winding roller;

step two, electrolytic oxidation, namely electrolyzing the raw material copper foil by taking the inert material as a cathode and the raw material copper foil as an anode;

step three, secondary electrolysis, wherein the electrolyzed raw material copper foil is separated from the electrolyte, the separated raw material copper foil stops reacting in the conveying process, and then enters the electrolyte for secondary electrolysis;

washing and drying, namely washing the surface of the copper foil after electrolysis by using clear water to remove impurities generated in the electrolysis process, and then drying the washed copper foil;

coating the slurry, namely coating the slurry on the surface of the copper foil by adopting a coating assembly;

and step six, drying and cutting the copper foil coated with the slurry.

2. A special apparatus for manufacturing a porous copper foil by the method for manufacturing a porous copper foil according to claim 1, comprising a supporting member, an electrolyzing member, a cleaning member and a coating member;

the support assembly comprises a fixed box, electrolyte is arranged in the fixed box, and a water guide box is fixedly connected to one side of the fixed box;

the electrolytic assembly comprises a movable frame, and the movable frame is positioned in the fixed box;

the cleaning assembly comprises two symmetrically distributed fixing frames, and the middle of the outer side surface of each fixing frame is fixedly connected with the top end of the inner side wall of the water guide tank;

the coating assembly comprises two symmetrically distributed support arms, a support rod is fixedly connected to the middle of one side of each support arm, and one end of each support rod is fixedly connected with the top end of the outer side face of the water guide tank.

3. The special equipment for manufacturing the porous copper foil according to claim 2, wherein: the utility model discloses a graphite electrode, including fixed case, one side of fixed case, the backup pad of two symmetric distributions of one side fixedly connected with of fixed case, the inboard of backup pad has the blowing roller through bearing swing joint, the bottom inner wall fixedly connected with fixing base of fixed case, the fixing base sets up to boss shape structure, the equal fixedly connected with fixed plate in the middle part of the both sides of fixing base, the lateral surface of fixed plate is inlayed and is had a plurality of graphite electrodes that are equidistant distribution.

4. The special equipment for manufacturing the porous copper foil according to claim 2, wherein: the adjustable box comprises a fixed box and a movable frame, wherein two clamping seats are symmetrically distributed and fixedly connected to the middle portions of two sides of the movable frame, the clamping seats are connected with the top end of the fixed box in a clamping mode, the top ends of the two sides of the movable frame are movably connected with guide rollers through bearings, and the bottom ends of the two sides of the movable frame are movably connected with two reversing rollers through bearings.

5. The special equipment for manufacturing the porous copper foil according to claim 2, wherein: the inboard middle part fixedly connected with mount of adjustable shelf, the mount sets up to "the shape structure of" U ", the equal fixedly connected with in bottom four corners department of mount extends the board, it sets up to the slope structure to extend the board, there is the movable roller extension medial surface bottom of extending the board through bearing swing joint, the both sides middle part of mount all is equipped with the intubate, the inside grafting of intubate is connected with the picture peg, the picture peg sets up to" the shape structure of "U".

6. The special equipment for manufacturing the porous copper foil according to claim 5, wherein: the utility model discloses a graphite electrode plate, including picture peg, spring, mount, medial surface bottom fixedly connected with of picture peg, the top inner wall of picture peg passes through the upper surface swing joint of spring and mount, the medial surface bottom fixedly connected with of picture peg leads electrical pillar, it has the electrode slice to lead the upper surface middle part of electrical pillar to inlay, the electrode slice sets up to "protruding" shape structure, the material of electrode slice is graphite material, lead the equal fixedly connected with connecting wire in both ends of electrical pillar.

7. The special equipment for manufacturing the porous copper foil according to claim 2, wherein: the inboard middle part fixedly connected with baffle of fixed frame, the medial surface four corners department of fixed frame all has the fixed roll through bearing swing joint, two sets of extension frames of the equal fixedly connected with in both sides of fixed frame, it sets up to the triangle-shaped structure to extend the frame, the medial surface one end of extending the frame has the guide roller through bearing swing joint.

8. The special equipment for manufacturing the porous copper foil according to claim 7, wherein: the middle part of the inner side of the extension frame on one side is fixedly connected with a water guide cover, two ends of the water guide cover are both provided with inclined planes, a plurality of spray heads which are distributed at equal intervals are inlaid at two ends of the water guide cover, a water collecting component is correspondingly arranged at the water outlet of each group of spray heads, each water collecting component comprises a supporting roll, a water absorbing layer is arranged on the periphery of the supporting roll, the water absorbing layer is in extrusion contact with a water scraping plate, a water accumulating tank is arranged below the water scraping plate, a flow sensor is arranged on a flow guide pipe at the bottom of the water accumulating tank at the upper part corresponding to the upper water guide cover, the flow sensor can detect the flow of water in the flow guide pipe at the bottom of the water accumulating tank, and the quantity of micropores penetrating through the copper foil and generated after electrolysis is fed back through the flow of the flow guide pipe detected by the flow sensor; the water pump is fixedly connected to the middle of the outer side face of the fixing frame, the water pipe is fixedly connected to the output end of the water pump, and one end of the water pipe is located in the water guide cover.

9. The special equipment for manufacturing the porous copper foil according to claim 7, wherein: the air guide cover is fixedly connected to the middle of the inner side of the extending frame on the other side, the two ends of the air guide cover are arranged to be inclined planes, the suction fan is fixedly connected to the middle of one side of the air guide cover, air outlet grooves are formed in the middle of the two ends of the air guide cover in a penetrating mode, and the air outlet grooves are arranged to be of strip-shaped structures.

10. The special equipment for manufacturing the porous copper foil according to claim 2, wherein: the medial surface both ends of support arm all have the deflector roll through bearing swing joint, the inboard middle part of support arm is provided with the coating case of two symmetric distributions, two the equal fixedly connected with connecting seat in one side both ends that the coating case is close to each other, the connecting seat passes through bolt and support arm fixed connection, the inside of coating case is provided with the cavity, the top of cavity is provided with the coating roller, the inside of cavity is provided with the material loading roller, the inner wall swing joint of bearing and cavity is all passed through at the both ends of coating roller and material loading roller, the outside wall of coating roller and material loading roller is laminated mutually, the lateral surface top of coating case is inlayed and is had the filling tube.

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