CN115787028A

CN115787028A - Method for manufacturing porous copper foil and special equipment thereof

Info

Publication number: CN115787028A
Application number: CN202211453194.1A
Authority: CN
Inventors: 李应恩; 李会东; 王斌; 王建智; 黄建权; 杨锋; 段晓翼; 裴晓哲
Original assignee: Lingbao Baoxin Electronic Technology Co Ltd
Current assignee: Lingbao Baoxin Electronic Technology Co Ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-03-14

Abstract

The invention discloses a manufacturing method of a porous copper foil, which relates to the technical field of porous copper foil preparation and comprises the following steps: raw material finishing, electrolytic oxidation, secondary electrolysis, cleaning and drying and slurry coating. The invention also discloses special equipment for manufacturing the porous copper foil, which comprises a supporting component, an electrolysis component, a cleaning component and a coating component. According to the invention, the raw copper foil is subjected to electrolytic oxidation treatment, a plurality of micropores are formed on the surface of the raw copper foil after electrolysis, and the raw copper foil is subjected to twice electrolysis, so that the number of micropores on the surface of the copper foil can be ensured.

Description

Method for manufacturing porous copper foil and special equipment thereof

Technical Field

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

Background

The positive electrode material of the lithium battery current collector is generally an aluminum foil, the negative electrode material is generally a copper foil, polymer slurry is coated on the prepared aluminum foil or copper foil by adopting a coating device, and then the aluminum foil or copper foil is dried and cut to obtain the corresponding current collector material. In order to improve the adhesion stability of the polymer slurry on the aluminum foil or copper foil and further improve the performance of the lithium battery, the copper foil is often treated in an electrolytic manner to have a porous structure. The copper foil with the porous structure has a larger surface area, so that more polymer slurry can be attached when the polymer slurry is coated, and the performance of the battery is improved; on the other hand, the porous part above the copper foil can be communicated with the polymer slurry coated on the two sides of the copper foil, so that the adhesive force of the polymer slurry on the copper foil is improved, and the stability of the lithium battery is further improved.

The Chinese patent with the application number of 2018114689605 discloses a preparation technology of a porous copper foil for a lithium ion battery cathode, wherein a chemical corrosion method is adopted to obtain a porous structure on the copper foil, a plurality of holes penetrating through the thickness of a film are formed on a high polymer insulating film, the film with the holes is wrapped on the surface of a titanium cathode roller, and the titanium cathode roller is immersed in an electrolytic bath; copper foil is wound around the surface of the titanium cathode roller, the titanium cathode roller rotates to enable the copper foil to move continuously, meanwhile, a pulse voltage is applied between the copper foil and the titanium cathode roller, the copper foil is a positive electrode, and the titanium cathode roller is a negative electrode; under the action of the electrolyte, the copper foil is partially discharged, the copper foil positioned at the position corresponding to the hole of the insulating film is dissolved, and hole distribution consistent with the porous structure of the insulating film is formed on the copper foil; and then washing with deionized water to obtain the porous copper foil.

The copper foil preparation scheme only considers the problem of uniformity of the corrosion current flip cover on the surface of the copper foil, and does not consider whether the porous structure of the micropores on the copper foil and the porous structure penetrate through the copper foil so as to ensure that polymer slurry on two sides of the copper foil can penetrate through the porous structure to be mutually bonded when polymer slurry is coated on the copper foil in the subsequent process to improve the performance of the lithium battery. And no corresponding technical scheme is provided for cleaning and drying the copper foil subjected to electrolytic corrosion and coating the polymer slurry.

Therefore, it is necessary to provide a method for manufacturing a porous copper foil and a dedicated apparatus thereof to solve the above-mentioned technical problems.

Disclosure of Invention

The present invention is directed to a method for manufacturing a porous copper foil and a special apparatus thereof, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a method for manufacturing a porous copper foil includes 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.

A special device for manufacturing a porous copper foil adopts a manufacturing method of the porous copper foil to manufacture the porous copper foil, and comprises a supporting component, an electrolysis component, a cleaning component and a coating component;

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 fixed frames, and the middle of the outer side surface of each fixed 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 the support rod is fixedly connected with the top end of the outer side face of the water guide tank.

Preferably, the backup pad of two symmetric distributions of one side fixedly connected with of fixed box, there is the blowing roller inboard of backup pad through bearing swing joint, the bottom inner wall fixedly connected with fixing base of fixed box, 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.

Preferably, the middle parts of the two sides of the movable frame are fixedly connected with two clamping seats which are symmetrically distributed, 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.

Preferably, the inboard middle part fixedly connected with mount of adjustable shelf, the mount sets up to "U" shape structure, the equal fixedly connected with extension board in bottom four corners department of mount, the extension board sets up to the slope structure, there is the movable roller extension board medial surface bottom of extension 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 "U" shape structure.

Preferably, 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 inlay in the middle part of the upper surface of leading electrical pillar, 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.

Preferably, 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, there is the guide roller medial surface one end of extending the frame through bearing swing joint.

Preferably, a water guide cover is fixedly connected to the middle of the inner side of the extension frame on one side, two ends of the water guide cover are both provided with inclined planes, a plurality of spray heads 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, the water collecting component comprises a supporting roll, a water absorbing layer is arranged on the periphery of the supporting roll, a water scraping plate is in extrusion contact with the water absorbing layer, 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 flow of the flow guide pipe detected by the flow sensor is used for reflecting the number of micropores penetrating through the copper foil after the copper foil is electrolyzed; the lateral surface middle part fixedly connected with water pump of fixed frame, the output fixedly connected with water pipe of water pump, the one end of water pipe is located the water guide cover.

Preferably, the other side is fixedly connected with a wind scooper in the middle of the inner side of the extension frame, two ends of the wind scooper are both arranged to be inclined planes, a fan is fixedly connected with the middle of one side of the wind scooper, air outlet grooves are formed in the middle of two ends of the wind scooper in a penetrating mode, and the air outlet grooves are arranged to be of a strip-shaped structure.

Preferably, 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 outer side 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.

The invention has the technical effects and advantages that:

1. according to the invention, the raw copper foil is subjected to electrolytic oxidation treatment, a plurality of micropores are formed on the surface of the raw copper foil after electrolysis, and the raw copper foil is subjected to twice electrolysis, so that the number of micropores on the surface of the copper foil can be ensured;

2. according to the invention, the cleaning component is arranged on one side of the electrolysis component, the cleaning component can clean and dry the electrolyzed copper foil, and the coating component is arranged on one side of the cleaning component, so that the coating of slurry on the surface of the copper foil can be realized, the continuous treatment of the raw material copper foil can be realized, and the preparation efficiency of the porous copper foil is further improved;

3. the invention can not only clean and flush the accumulated water on the copper foil by the cooperation of the water collecting component and the nozzle, but also detect the flow of the accumulated water led out of the water collecting component from the flow guide pipe on one of the water collecting components by the flow sensor arranged on the water collecting component, further reflect the number of micropores penetrating through the copper foil after the copper foil is electrolyzed by the flow of the flow guide pipe, and trigger the alarm mechanism of the device when the flow sensor detects an abnormal flow value to remind production personnel to investigate relevant factors such as electrolytic current, electrolyte concentration, electrolytic time and the like in an electrolytic process so as to ensure the quality of the electrolytic copper foil, thereby having important significance for ensuring the improvement of the production quality of the copper foil.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

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

FIG. 3 is a schematic view of the electrolytic assembly of the present invention.

FIG. 4 is a schematic front view of the electrolytic module of the present invention.

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

Fig. 6 is a schematic view of the structure of the interposer of the present invention.

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

FIG. 8 is a schematic view of the cleaning assembly of the present invention.

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

Fig. 10 is a schematic view of the wind scooper of the present invention.

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

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

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

FIG. 14 is a schematic view showing a transportation route of a raw copper foil of the present invention.

FIG. 15 is an enlarged view of a portion of FIG. 14 according to the present invention.

In the figure: 1. a support assembly; 2. an electrolytic assembly; 3. cleaning the assembly; 4. coating the component; 101. a fixed box; 102. a water guide tank; 103. a support plate; 104. a discharge roller; 105. a fixed seat; 106. a fixing plate; 107. a graphite electrode; 201. a movable frame; 202. a card holder; 203. a guide roller; 204. a reversing roller; 205. a fixed mount; 206. an extension plate; 207. a movable roll; 208. inserting a tube; 209. inserting plates; 210. a conductive post; 211. an electrode sheet; 212. connecting a lead; 301. a fixing frame; 302. a partition plate; 303. a fixed roller; 304. an extension frame; 305. a guide roller; 306. a water guide cover; 307. a spray head; 308. a water pump; 309. a water pipe; 310. a wind scooper; 311. an exhaust fan; 312. an air outlet groove; 313. a water collection assembly; 3131. a support roll; 3132. a water-absorbing layer; 3133. a wiper blade; 3134. a water accumulation tank; 401. a support arm; 402. a support bar; 403. a guide roller; 404. a paint tank; 405. a connecting seat; 406. a cavity; 407. a paint roller; 408. a feeding roller; 409. a feed tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a method for manufacturing a porous copper foil, which comprises the following steps:

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

The invention provides a special device for a manufacturing method of a porous copper foil as shown in figures 1 to 15, which comprises a support component 1, an electrolysis component 2, a cleaning component 3 and a coating component 4, wherein the electrolysis component 2 is arranged above the support component 1, the cleaning component 3 is arranged on one side of the support component 1, and the coating component 4 is arranged on one side of the cleaning component 3.

Supporting component 1 includes fixed box 101, be provided with electrolyte in the fixed box 101, one side fixedly connected with water guide tank 102 of fixed box 101, the backup pad 103 of two symmetric distributions of one side fixedly connected with of fixed box 101, there is blowing roller 104 inboard of backup pad 103 through bearing swing joint, the bottom inner wall fixedly connected with fixing base 105 of fixed box 101, fixing base 105 sets up to boss shape structure, the equal fixedly connected with fixed plate 106 in middle part of fixing base 105's both sides, the lateral surface of fixed plate 106 is inlayed and is a plurality of graphite electrode 107 that are equidistant distribution.

Electrolytic component 2 includes adjustable shelf 201, adjustable shelf 201 is located the fixed box 101, the cassette 202 of two symmetric distributions of the equal fixedly connected with in both sides middle part of adjustable shelf 201, cassette 202 is connected with the top joint of fixed box 101, the both sides top of adjustable shelf 201 all has guide roll 203 through bearing swing joint, the both sides bottom of adjustable shelf 201 all has two switching-over rollers 204 through bearing swing joint, the inboard middle part fixedly connected with mount 205 of adjustable shelf 201, mount 205 sets up to "n" shape structure, the equal fixedly connected with extension board 206 in bottom four corners department of mount 205, extension board 206 sets up to the inclined structure.

Specifically, the bottom end of the inner side surface of the extension plate 206 is movably connected with a movable roller 207 through a bearing, the middle parts of two sides of the fixed frame 205 are both provided with insertion pipes 208, the insertion pipes 208 are connected with an insertion plate 209 in an insertion manner, the insertion plate 209 is arranged to be n-shaped, the inner wall of the top end of the insertion plate 209 is movably connected with the upper surface of the fixed frame 205 through a spring, the bottom end of the inner side surface of the insertion plate 209 is fixedly connected with a conductive column 210, the middle part of the upper surface of the conductive column 210 is inlaid with an electrode plate 211, and the electrode plate 211 is arranged to be convex; therefore, the inserting plate 209 can drive the conductive post 210 and the electrode plate 211 to move up and down in the process of moving up and down relative to the fixing frame 205, so that the electrode plate 211 can be tightly attached to the copper foil.

More specifically, the material of electrode slice 211 is graphite material, and the raw materials copper foil is when two movable roll 207, and the upward movement of conducting post 210 between two movable roll 207 is under the effect of spring, and it drives electrode slice 211 upward movement to lead the electrical pillar 210 for electrode slice 211 and raw materials copper foil contact, thereby make the raw materials copper foil electrified, the equal fixedly connected with connecting wire 212 in both ends of conducting post 210, connecting wire 212 can be connected with the power of electrolysis usefulness.

Cleaning assembly 3 includes two fixed frames 301 of symmetric distribution, and fixed frame 301's lateral surface middle part and guide water tank 102's inside wall top fixed connection wash assembly 3 when wasing the copper foil surface, in the water that uses among the cleaning process fell into guide water tank 102, then discharged through the outlet that guide water tank 102 bottom set up. The middle part of the inner side of the fixed frame 301 is fixedly connected with a partition plate 302, four corners of the inner side surface of the fixed frame 301 are movably connected with fixed rollers 303 through bearings, two groups of extension frames 304 are fixedly connected to two sides of the fixed frame 301, and the extension frames 304 are arranged in a triangular structure; specifically, there is guide roller 305 to extend the medial surface one end of frame 304 through bearing swing joint, the inboard middle part fixedly connected with water guide cover 306 of fixed frame 301 one side extension frame 304, the both ends of water guide cover 306 all set up to the inclined plane, the both ends of water guide cover 306 are all inlayed and are a plurality of shower nozzles 307 that are equidistant distribution, the lateral surface middle part fixedly connected with water pump 308 of fixed frame 301, the output fixedly connected with water pipe 309 of water pump 308, the one end of water pipe 309 is located water guide cover 306. As shown in fig. 14, a water collecting assembly 313 is correspondingly disposed at the water outlet of each group of nozzles 307, the water collecting assembly 313 includes a supporting roll 3131, a water absorbing layer 3132 is disposed at the periphery of the supporting roll 3131, the water absorbing layer 3132 is in pressing contact with a water scraping plate 3133, a water collecting groove 3134 is disposed below the water scraping plate 3133, the water collecting groove 3134 is funnel-shaped, when the supporting roll 3131 drives the water absorbing layer 3132 to rotate, the water scraping plate 3133 can scrape water absorbed by the water absorbing layer 3132 and guide the water into the water collecting groove 3134, and a flow sensor is disposed on a flow guide pipe at the bottom of the water collecting groove 3134 at an upper position corresponding to the upper water guiding cover 306. The lower fixing roller 303 is also correspondingly provided with a water collecting component 313, and the water collecting component 313 is used for removing the water accumulated on the surface of the cleaned copper foil and preparing the copper foil for subsequent drying.

The inboard middle part fixedly connected with wind scooper 310 of fixed frame 301 opposite side extension frame 304, the both ends of wind scooper 310 all set up to the inclined plane, one side middle part fixedly connected with extraction fan 311 of wind scooper 310, and the both ends middle part of wind scooper 310 all runs through and has seted up air-out groove 312, and air-out groove 312 sets up to the bar structure.

The raw material copper foil passes through the cleaning assembly 3 under the action of the guide roller 305, at the moment, the water pump 308 can be externally connected with a water tank, flushing water with pressure is conveyed into the water guide cover 306, water in the water guide cover 306 can be sprayed to the surface of the raw material copper foil through the spray head 307, so that the surface of the raw material copper foil can be cleaned, and the two groups of spray heads 307 can clean the two sides of the copper foil. The corresponding water collection assembly 313 at each set of spray heads 307 functions as follows: on the one hand, the supporting roller 3131 can support the copper foil flushed by the head 307, so that the copper foil can be flushed under enough water pressure, and the phenomenon that the excessive water pressure sprayed by the head 307 influences the tension of the copper foil or causes tearing and breaking of the copper foil can be prevented. On the other hand, the water absorbing layer 3132 disposed on the supporting roll 3131, while contacting with the copper foil, not only can buffer the copper foil contacting with the supporting roll 3131, but also can absorb the water washed on the copper foil, in the process that the supporting roll 3131 drives the water absorbing layer 3132 to rotate, the wiper 3133 in pressing contact with the water absorbing layer 3132 can wipe off the washing water absorbed by the water absorbing layer 3132, the scraped washing water enters the water accumulating tank 3134 below along the wiper 3133, the water collected by the water accumulating tank 3134 is discharged through the flow guide pipe at the bottom of the water accumulating tank 3134, so as to prepare for the rapid drying of the subsequent copper foil by collecting and removing the water accumulated on the copper foil.

In particular, a flow sensor is provided on the flow guide tube at the bottom of the water collecting tub 3134 located at an upper position corresponding to the upper water guide hood 306, and the support roller 3131, the water absorbing layer 3132, the wiper plate 3133, and the water collecting tub 3134 at this position have the same functions as described above, and the flow sensor provided on the flow guide tube at the bottom of the water collecting tub 3134 at this position can detect the flow rate of water in the flow guide tube at the bottom of the water collecting tub 3134. The surface of the copper foil electrolyzed by the electrolysis component 2 can form a porous structure, micropores on the copper foil penetrate through the copper foil, and when polymer slurry is coated subsequently, the polymer slurry on two sides of the copper foil can be connected together through the micropores, so that the effect of polymer attached to the copper foil can be improved, and the performance of a lithium battery can be further improved. Therefore, the number of micropores penetrating through the copper foil is relatively larger in a certain range, and the improvement of the performance of the lithium battery is more beneficial. The micropores generated by the electrolytic copper foil have direct relation with factors such as the current magnitude of electrolysis, the concentration of electrolyte, the electrolysis time and the like, and the number of the micropores penetrating through the copper foil after electrolysis can be influenced when the factors change, so that the real-time monitoring of the number of the micropores penetrating through the copper foil has important significance for producing high-quality copper foil. When the copper foil is electrolyzed by the electrolysis assembly 2 and is conveyed to the upper position spray head 307 corresponding to the upper water guide cover 306, the corresponding support roller 3131 drives the water absorption layer 3132 to contact and support the copper foil; when the copper foil is washed by the pressurized washing water sprayed from the spray head 307, a part of the pressurized washing water 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, the washing water absorbed by the water absorbing layer 3132 is scraped by the scraping plate 3133 during the rotation of the water absorbing layer 3132 and is guided into the water collecting tank 3134, and when the collected water is discharged from the water collecting tank 3134 through the flow guide pipe, the flow rate of the collected water can be detected by the flow sensor on the flow guide pipe, so that the number of micropores penetrating through the copper foil generated after the copper foil is electrolyzed can be reflected by the flow rate of the flow guide pipe detected by the flow sensor. In the normal processing process, micropores penetrating through the copper foil after the copper foil is electrolyzed are uniform, when the flow of the flow guide pipe is smaller than the normal flow, the number of the micropores penetrating through the copper foil is reduced, when the flow of the flow guide pipe is larger than the normal flow, the number of the micropores penetrating through the copper foil is increased or the micropores are enlarged, the change of factors such as electrolytic current or electrolyte concentration and electrolytic time in the corresponding electrolytic process is reflected, when the flow sensor detects an abnormal flow value, an alarm mechanism of the device can be triggered, production personnel is reminded to check relevant factors such as the electrolytic current, the electrolyte concentration and the electrolytic time in the electrolytic process, so that the quality of the electrolytic copper foil is ensured, and the device has important significance for ensuring and improving the production quality of the copper foil.

The cleaned copper foil reaches one side of the air guiding cover 310, at this time, the air is extracted to the hot air in the air guiding cover 310 by the air extracting fan 311, and the hot air in the air guiding cover 310 reaches the surface of the copper foil through the air outlet groove 312, so that the drying of the surface of the copper foil can be accelerated, and the subsequent coating work can be carried out conveniently.

Coating unit 4 includes two symmetric distribution's support arm 401, one side middle part fixedly connected with bracing piece 402 of support arm 401, the one end of bracing piece 402 and the lateral surface top fixed connection of leading water tank 102, the medial surface both ends of support arm 401 all have deflector roll 403 through bearing swing joint, the inboard middle part of support arm 401 is provided with two symmetric distribution's scribble workbin 404, two scribble workbin 404 and be located the both sides of copper foil respectively, thereby can realize the coating to the copper foil two sides, when the copper foil only needs the single-sided coating, empty one scribble workbin 404 can realize the monolithic coating of copper foil.

Specifically, two ends of one side of each of two paint tanks 404, which are close to each other, are fixedly connected with connecting bases 405, the connecting bases 405 are fixedly connected with the support arm 401 through bolts, a cavity 406 is arranged inside the paint tank 404, a paint roller 407 is arranged at the top end of the cavity 406, a feeding roller 408 is arranged inside the cavity 406, the feeding roller 408 coats the slurry in the paint tank 404 onto the surface of the paint roller 407, and the paint roller 407 coats the slurry onto the surface of the copper foil, so that the coating of the slurry on the surface of the copper foil can be realized.

More specifically, both ends of the coating roller 407 and the feeding roller 408 are movably connected with 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 to each other, a feed pipe 409 is embedded at the top end of the outer side surface of the coating box 404, and the feed pipe 409 facilitates adding of slurry.

When the device carries out electrolytic oxidation treatment on a raw material copper foil, the raw material copper foil on the discharging roller 104 can be pulled by a traction mechanism externally connected with the device, the raw material copper foil sequentially passes through the guide roller 203 and the reversing rollers 204 and enters the fixed box 101, at the moment, the graphite electrode 107 in the fixed box 101 is connected with an external power supply, the graphite electrode 107 serves as a cathode, when the raw material copper foil passes through the two reversing rollers 204, the conductive column 210 between the two reversing rollers 204 moves upwards under the action of the spring, the conductive column 210 drives the electrode plate 211 to move upwards, so that the electrode plate 211 is contacted with the raw material copper foil, the raw material copper foil is electrified and serves as an anode, electrolyte is arranged in the fixed box 101, and a current path is formed between the raw material copper foil, the electrolyte and the graphite electrode 107, so that electrolytic treatment on the raw material copper foil is realized.

This device is when wasing the raw materials copper foil after the electrolysis, the raw materials copper foil after the electrolysis gets into through fixed roll 303 and washs in the subassembly 3, the raw materials copper foil is through wasing subassembly 3 under guide roll 305's effect, water pump 308 can external water tank this moment, will have the sparge water of pressure to carry to in the water guide cover 306, and the water in the water guide cover 306 can spray to the surface of raw materials copper foil through shower nozzle 307, thereby can realize the washing to raw materials copper foil surface, and two sets of shower nozzles 307 can realize the washing to the copper foil two sides. The cleaned copper foil reaches one side of the air guiding cover 310, at this time, the hot air is extracted into the air guiding cover 310 by the extracting fan 311, and the hot air in the air guiding cover 310 reaches the surface of the copper foil through the air outlet groove 312, so that the drying of the surface of the copper foil can be accelerated, and the subsequent coating work can be performed conveniently.

When the device coats the copper foil with slurry, the dried copper foil reaches between the two coating rollers 407 through the guide roller 403, the copper foil moves under the action of the traction mechanism, the copper foil drives the two coating rollers 407 to rotate through friction force, the coating rollers 407 can drive the feeding roller 408 to rotate, the feeding roller 408 coats the slurry in the coating box 404 to the surface of the coating roller 407, the coating roller 407 coats the slurry to the surface of the copper foil, the coating of the slurry on the surface of the copper foil can be realized, and after the slurry coating is finished, the processes of drying, slitting and the like are performed, so that a copper foil product is finally obtained.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

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 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.