A device for preparing microporous copper foil

Abstract

The invention discloses a device for preparing microporous copper foil, which includes a mounting platform and an arc-shaped electrolytic cell; an anode plate is provided in the arc-shaped electrolytic cell, a cathode roller is provided in the arc-shaped electrolytic cell, an insulating protrusion is provided on the cathode roller, a rotating shaft is provided, and a winding device is provided on the top surface of the mounting platform; a cleaning device is provided above the mounting platform, and the cleaning device includes a sponge roller; an extrusion device is provided on the mounting platform, and the extrusion device includes a fixed plate, an extrusion box and an extrusion block are provided on one side of the fixed plate, and the fixed plate is connected to the extrusion box and the extrusion block through a pneumatic rod; cams are provided at both ends of the rotating shaft, an air cylinder is provided on one side of the cam, and the air cylinder is connected to the air cylinder. Micropores can be directly formed on the surface of the copper foil after being formed by the invention, and the sponge roller can absorb residual electrolyte on the copper foil to prevent oxidation of the copper foil, and the extrusion device can reciprocate to extrude the sponge roller so that the sponge roller continuously absorbs the electrolyte.

Description

Technical Field

[0001] The invention relates to the technical field of copper foil manufacturing, in particular to a device for preparing microporous copper foil. Background Art

[0002] Lithium-ion batteries are composed of materials such as negative electrode, positive electrode, separator and electrolyte. The negative electrode of lithium-ion batteries is composed of negative electrode materials coated on both sides of copper foil. Currently, microporous copper foil is mostly used as the negative electrode of lithium-ion batteries because it has micropores, which makes the electrochemical reaction of the electrode material consistent on the positive and negative sides; the solvent of the binder is easier to evaporate evenly, and the electrolyte is easier to quickly and evenly infiltrate, which can effectively increase the contact area between the negative electrode material and the copper foil, reduce the electrode contact internal resistance, increase the power density, and reduce the amount of binder used.

[0003] The preparation of existing microporous copper foil mainly involves secondary mechanical punching of the copper foil substrate. There are mainly the following punching methods: one is a mold, which uses a mold to punch the copper foil. The disadvantage is that the mold requires high precision and is easily damaged, resulting in high manufacturing costs; the other is a conical part, which uses a conical part to directly punch holes. However, due to the thin copper foil, the punching is easy to deform, and there are burrs on the surface of the through-hole, which is not conducive to subsequent coating.

[0004] Currently, there is equipment that can directly open holes in the copper foil preparation process. However, since copper foil is prepared by electrolysis, a large amount of electrolyte will remain on both sides of the copper foil during the preparation process. The residual electrolyte will oxidize on the surface of the copper foil, affecting the quality and service life of the copper foil.

[0005] Therefore, there is an urgent need for a device for preparing microporous copper foil that does not use a mechanical hole-making method and can avoid electrolyte residue. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides an apparatus for preparing microporous copper foil.

[0007] The technical solution of the present invention is: a device for preparing microporous copper foil, the device includes a mounting platform and an arc-shaped electrolytic cell provided on the mounting platform; a plurality of legs are provided on the bottom surface of the mounting platform; an anode plate is provided on the inner wall of the arc-shaped electrolytic cell, and a cathode roller is provided in the arc-shaped electrolytic cell, a plurality of insulating protrusions are provided on the roller surface of the cathode roller, and a rotating shaft for rotationally connecting to the side wall of the electrolytic cell is provided at the center position of the cathode roller, both ends of the rotating shaft pass through the side wall of the electrolytic cell and extend to the outside of the mounting platform, and a second pulley is provided at one end of the rotating shaft, a first motor is provided on the bottom surface of the mounting platform, and the output of the first motor is A first pulley for cooperating with a second pulley for belt transmission connection is provided on the output shaft; a winding device for winding up the copper foil is provided on the top surface of the mounting platform located on one side of the arc-shaped electrolytic cell; a cleaning device for cleaning the electrolyte on the surface of the copper foil is provided above the mounting platform located between the winding device and the arc-shaped electrolytic cell, the cleaning device is arranged parallel to the cathode roller, and the cleaning device includes two sponge rollers, the two sponge rollers are respectively a first sponge roller and a second sponge roller, and the second sponge roller is located directly below the first sponge roller, and first mounting plates are provided on both sides of the mounting platform, which are located between the two first mounting plates and a plurality of coupling members are provided on the mounting platform, the plurality of coupling members are connected to the mounting platform, and the plurality of coupling members are connected to the plurality of coupling members.

[0008] Description: After the above-mentioned equipment energizes the cathode roller and the anode plate, the copper ions in the electrolyte will be directly deposited on the surface of the rotating cathode roller. Since copper ions will not be deposited at the position of the insulating protrusion, micropores can be directly formed on the surface of the formed copper foil without the need for subsequent processing, which simplifies the production steps and reduces costs. There is no deformation on both sides of the micropores and the surface of the copper foil is flat. When the copper foil passes between the two sponge rollers, the rotating sponge roller can absorb the residual electrolyte on both sides of the copper foil. At the same time, when the cathode roller rotates, the extrusion device can push the piston through the cam to extend the pneumatic rod back and forth. The pneumatic rod will drive the extrusion box and the extrusion block to extrude the sponge roller back and forth, so that the sponge roller can absorb and release the electrolyte, so that the sponge roller can continuously absorb the electrolyte, and the extrusion box can store the electrolyte squeezed out of the first sponge roller to prevent the electrolyte from falling back on the copper foil.

[0009] Furthermore, the winding device includes a winding roller, which is arranged parallel to the cathode roller, and both ends of the winding roller are rotatably connected to the second mounting plates provided on both sides of the mounting platform, and a third motor is provided at one end of the winding roller.

[0010] Description: The winding roller can rotate to reel in the copper foil, and the reeling process is stable, and the copper foil is not easily deformed.

[0011] Furthermore, a drying device is provided on the mounting platform between the winding device and the cleaning device. The drying device includes two parallel heating plates, and both ends of the two heating plates are fixedly connected to third mounting plates provided on both sides of the mounting platform.

[0012] Description: The heating plate can heat both sides of the copper foil to quickly evaporate the moisture on the surface of the copper foil, avoiding residual moisture in the copper foil after winding.

[0013] Furthermore, a water storage tank is provided on the mounting platform below the cleaning device.

[0014] Note: The water tank can collect the electrolyte produced by the squeezing block squeezing the second sponge roller to prevent the electrolyte from scattering on the mounting table.

[0015] Furthermore, one end of the squeeze box is provided with a water outlet pipe communicating with the interior thereof.

[0016] Note: The electrolyte generated when the first sponge roller is squeezed can be stored in the squeeze box and discharged through the outlet pipe to prevent the squeeze box from being filled up.

[0017] Furthermore, the two ends of the two shafts are respectively rotatably connected to the two first mounting plates, and one end of the two shafts passes through the first mounting plate and is fixed with a gear, the two gears are engaged with each other, and the other end of one of the shafts is provided with a stepper motor for driving its rotation.

[0018] Description: The stepper motor can drive the shaft to rotate, and under the action of the gear, the two shafts rotate synchronously in opposite directions, so that the two sponge rollers can be moved closer or apart at the same time to adjust the distance between the two sponge rollers so that the sponge rollers can fit tightly to copper foils of different thicknesses.

[0019] Furthermore, a water retaining box for covering the cathode roller is provided on the mounting platform located on the other side of the arc-shaped electrolytic cell, and a brush roller for scrubbing the electrolyte on the surface of the copper foil is provided in the water retaining box. Both ends of the brush roller are rotatably connected to the side walls of the water retaining box, and a fourth motor for driving the brush roller to rotate is provided at one end of the brush roller.

[0020] Description: The water retaining box can directly block the electrolyte brought up when the cathode roller rotates, and the brush roller can directly brush off the electrolyte on the surface of the copper foil, further reducing the residual electrolyte on the surface of the copper foil.

[0021] Furthermore, a liquid adding box is provided at the bottom of the water retaining box, and both ends of the liquid adding box pass through the slide groove provided on the side wall of the water retaining box; two cams are provided with sleeves on the side close to the water retaining box, and the two sleeves are fixedly connected to the mounting table, and a sliding rod for reciprocating sliding in cooperation with the rotation of the cam is provided in the sleeve, one end of the sliding rod contacts the cam, and the other end of the sliding rod passes through the top surface of the sleeve and is fixedly connected to the liquid adding box, and a block is fixedly sleeved on the sliding rod located in the sleeve, and a spring is sleeved on the sliding rod between the block and the top surface of the sleeve; a liquid outlet is provided on the side wall of the liquid adding box close to the side of the arc-shaped electrolytic cell, and a sealing rod for controlling the opening of the liquid outlet by reciprocating sliding of the liquid adding box is provided in the liquid outlet, one end of the sealing rod passes through the liquid outlet, and the other end of the sealing rod passes through the side wall of the liquid adding box and is fixedly connected to the water retaining box.

[0022] Description: Electrolyte can be stored in the liquid adding box. The rotation of the cam and the sliding rod can drive the liquid adding box to reciprocate. At this time, the liquid outlet also slides back and forth on the sealing rod, so that the liquid outlet can be opened and closed. When the cathode roller rotates, the liquid adding box can continuously add electrolyte to the arc electrolytic cell to avoid uneven thickness of the copper foil caused by excessive consumption of electrolyte.

[0023] The beneficial effects of the present invention are:

[0024] (1) After the cathode roller and the anode plate are energized, the copper ions in the electrolyte are directly deposited on the surface of the rotating cathode roller. Since the position of the insulating protrusion does not deposit copper ions, micropores can be directly formed on the surface of the formed copper foil without the need for subsequent processing, which simplifies the production steps and reduces costs. In addition, there is no deformation on both sides of the micropores and the surface of the copper foil is smooth.

[0025] (2) When the copper foil passes between the two sponge rollers, the rotating sponge roller of the cleaning device of the present invention can absorb the electrolyte remaining on both sides of the copper foil; at the same time, when the cathode roller rotates, the extrusion device can drive the cam to push the piston to extend the pneumatic rod back and forth, so that the extrusion box and the extrusion block can reciprocate and squeeze the sponge roller, so that the sponge roller can continuously absorb the electrolyte.

[0026] (3) The stepper motor of the present invention can drive the shaft to rotate, and under the action of the gear, the two shafts can rotate synchronously in opposite directions, so that the two sponge rollers can be moved closer or apart at the same time to adjust the distance between the two sponge rollers so that the sponge rollers can fit tightly to copper foils of different thicknesses.

[0027] (4) The liquid adding box of the present invention can store electrolyte. The rotation of the cam and the cooperation of the slide rod can drive the liquid adding box to move back and forth, so that the liquid outlet can be opened back and forth, so that the liquid adding box can continuously add electrolyte to the arc-shaped electrolytic cell when the cathode roller rotates, thereby avoiding excessive consumption of electrolyte and causing uneven thickness of the copper foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0029] Figure 2 This is a cross-sectional view of an arc-shaped electrolytic cell according to embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the cam structure of embodiment 1 of the present invention;

[0031] Figure 4 This invention Figure 3 A magnified view of point A;

[0032] Figure 5 This is a schematic structural diagram of a cleaning device and an extrusion device according to embodiment 1 of the present invention;

[0033] Figure 6 This is a schematic structural diagram of a sponge roller according to embodiment 1 of the present invention;

[0034] Figure 7 This is a schematic structural diagram of an extrusion device according to embodiment 1 of the present invention;

[0035] Figure 8 This is a schematic structural diagram of an air cylinder according to embodiment 1 of the present invention;

[0036] Figure 9 This is a schematic structural diagram of a sponge roller according to embodiment 2 of the present invention;

[0037] Figure 10 This is a schematic diagram of the overall structure of Example 3 of the present invention;

[0038] Figure 11 yes Figure 10 Enlarged view of point B;

[0039] Figure 12 This is a schematic diagram of the internal structure of the water retaining box in Example 3 of the present invention;

[0040] Figure 13 This is a schematic diagram of the internal structure of the liquid adding box according to embodiment 3 of the present invention;

[0041] Figure 14 This is a schematic diagram of the internal structure of the sleeve in Example 3 of the present invention;

[0042] Among them, 1-mounting table, 11-winding roller, 12-heating plate, 2-arc electrolytic cell, 21-anode plate, 22-cathode roller, 23-rotating shaft, 231-second pulley, 24-first pulley, 25-cam, 3-cleaning device, 31-sponge roller, 32-shaft, 33-gear, 4-extrusion device, 41-extrusion box, 42-extrusion block, 43-fixed plate, 44-air cylinder, 45-air pressure rod, 5-water retaining box, 51-brush roller, 52-liquid adding box, 53-sleeve, 54-slide rod. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with specific implementation methods to better demonstrate the advantages of the present invention.

[0044] Example 1

[0045] like Figure 1 As shown, a device for preparing microporous copper foil includes a mounting platform 1 and an arc-shaped electrolytic cell 2 provided on the mounting platform 1; the bottom surface of the mounting platform 1 is provided with six legs;

[0046] like Figure 2 As shown, an anode plate 21 is provided on the inner wall of the arc-shaped electrolytic cell 2, and a cathode roller 22 is provided in the arc-shaped electrolytic cell 2. A plurality of insulating protrusions are provided on the roller surface of the cathode roller 22. The insulating protrusions are made of ceramic material, and the plurality of insulating protrusions are radially distributed along the roller surface of the cathode roller 22 at equal angles.

[0047] A rotating shaft 23 for rotationally connecting to the side wall of the electrolytic cell 2 is provided at the center of the cathode roller 22. The left and right ends of the rotating shaft 23 pass through the connecting plates provided on the left and right side walls of the electrolytic cell 2 and extend to the outside of the mounting platform 1. A second pulley 231 is provided at the left end of the rotating shaft 23.

[0048] The bottom surface of the mounting platform 1 is provided with a first motor, which is a commercially available motor. The output shaft of the first motor is provided with a first pulley 24 for cooperating with the second pulley 231 for belt transmission connection;

[0049] A winding device for winding up the copper foil is provided on the top surface of the mounting platform 1 located on the left side of the arc-shaped electrolytic cell 2. The winding device includes a winding roller 11. The winding roller 11 is arranged parallel to the cathode roller 22. The left and right ends of the winding roller 11 are rotatably connected to the second mounting plates provided on the left and right sides of the mounting platform 1, respectively. A third motor is provided on the left end of the winding roller 11. The third motor adopts a commercially available motor.

[0050] like Figure 5 As shown, a cleaning device 3 for cleaning the electrolyte on the surface of the copper foil is provided above the mounting platform 1 between the winding device and the arc-shaped electrolytic cell 2. The cleaning device 3 is arranged parallel to the cathode roller 22 and includes two sponge rollers 31. The two sponge rollers 31 are respectively a first sponge roller and a second sponge roller, and the second sponge roller is located directly below the first sponge roller.

[0051] like Figure 6 As shown, a first mounting plate is provided on the left and right sides of the mounting platform 1, and a shaft 32 corresponding to the position of the two sponge rollers 31 is provided between the two first mounting plates. The two shafts 32 are fixedly connected to cranks for rotationally connecting to the left and right ends of the two sponge rollers 31, and the left ends of the two sponge rollers 31 are each provided with a second motor, which is a commercially available motor; a water tank is provided on the mounting platform 1 below the cleaning device 3;

[0052] like Figure 7 As shown, an extrusion device 4 is provided on the mounting platform 1 between the cleaning device 3 and the arc-shaped electrolytic cell 2. The extrusion device 4 is arranged parallel to the cleaning device 3, and the extrusion device 4 includes fixed plates 43 provided on the left and right sides of the mounting platform 1.

[0053] On the left side of the two fixed plates 43 are provided an extrusion box 41 for squeezing the first sponge roller and an extrusion block 42 for squeezing the second sponge roller. The two fixed plates 43 are fixedly connected to the two ends of the extrusion box 41 and the two ends of the extrusion block 42 respectively through pneumatic rods 45 provided therein. The pneumatic rods 45 are commercially available pneumatic rods. One end of the extrusion box 41 is provided with a water outlet pipe communicating with the interior thereof.

[0054] like Figure 3 、 4 As shown, cams 25 are sleeved on both the left and right ends of the rotating shaft 23 at the corresponding positions of the two fixing plates 43, and grooves for accommodating the two cams 25 are provided on the mounting platform 1. Air cylinders 44 are provided on the left sides of the two cams 25;

[0055] like Figure 8As shown, two air cylinders 44 are fixedly connected to the mounting platform 1, and a piston is slidably and sealedly connected inside the air cylinder 44. A push rod is provided at the right end of the piston for rotating and cooperating with the cam 25 to push the piston to slide back and forth left and right. The left end of the piston is connected to the top surface of the air cylinder 44 by a spring. The two air cylinders 44 are respectively connected to the gas pressure rod 45 in the fixed plate 43 on the corresponding side.

[0056] A drying device is provided on the mounting platform 1 between the winding device and the cleaning device 3. The drying device includes two parallel heating plates 12. The heating plates 12 are commercially available heating plates, and the left and right ends of the two heating plates 12 are respectively fixedly connected to the third mounting plates provided on both sides of the mounting platform 1.

[0057] The working principle of the above equipment is as follows: connect the positive electrode of the power supply to the anode plate 21, connect the negative electrode of the power supply to the cathode roller 22, add electrolyte to the arc-shaped electrolytic cell 2, and the electrolyte is a copper sulfate solution;

[0058] The first motor is started to rotate the first pulley 24, which drives the rotating shaft 23 to rotate at a constant speed through the second pulley 231. The cathode roller 22 rotates along with the rotating shaft 23. Under the action of the current, the copper ions in the electrolyte move toward the cathode. The copper ions on the cathode receive electrons and are reduced to copper, which is deposited on the surface of the cathode roller 22 to form copper foil. Since the copper ions cannot be deposited at the location of the insulating protrusions, the surface of the formed copper foil has micropores.

[0059] The third motor is started to make the winding roller 11 continuously roll up the formed copper foil. When the copper foil passes between the two sponge rollers 31, the second motor is started to drive the sponge rollers 31 to rotate and absorb the electrolyte on both sides of the copper foil.

[0060] When the shaft 23 rotates, it drives the cam 25 to rotate. The cam 25 pushes the piston to slide back and forth left and right in the cylinder 44 through the push rod and the spring. The gas in the cylinder 44 enters the gas pressure rod 45 under the push of the piston, causing the gas pressure rod 45 to reciprocate and extend.

[0061] The extension of the pneumatic rod 45 pushes the squeezing box 41 and the squeezing block 42, and the squeezing box 41 comes into contact with the first sponge roller. When the first sponge roller rotates, it is squeezed by the squeezing box 41, causing the electrolyte inside the first sponge roller to flow into the squeezing box 41 and be discharged through the outlet pipe;

[0062] The squeezing block 42 contacts the second sponge roller, and the second sponge roller is squeezed by the squeezing block 42 when rotating, causing the electrolyte inside the second sponge roller to fall into the water storage tank;

[0063] When the copper foil passes between the two heating plates 12 , the heating plates 12 are started to increase the temperature of the heating plates 12 to dry both sides of the copper foil.

[0064] Example 2

[0065] like Figure 9 As shown, the left and right ends of the two shafts 32 are rotatably connected to the two first mounting plates respectively, and the right ends of the two shafts 32 pass through the first mounting plates and are fixed with gears 33. The two gears 33 are engaged with each other, and the left end of one of the shafts 32 is provided with a stepper motor for driving its rotation. The stepper motor uses a commercially available stepper motor with a brake device.

[0066] The working principle of the above structure is: a stepper motor can drive one shaft 32 to rotate, and one shaft 32 drives the other shaft 32 to rotate synchronously in the opposite direction through a gear 33. The shaft 32 drives the sponge roller 31 to rotate with the shaft 32 as the center through a crank, so that the two sponge rollers 31 are brought closer or separated to adjust the distance between the two sponge rollers 31.

[0067] Example 3

[0068] like Figure 10 As shown, a water retaining box 5 for covering the cathode roller 22 is provided on the mounting platform 1 located on the right side of the arc-shaped electrolytic cell 2;

[0069] like Figure 12 As shown, a brush roller 51 for scrubbing the electrolyte on the surface of the copper foil is provided in the water retaining box 5. The left and right ends of the brush roller 51 are rotatably connected to the left and right side walls of the water retaining box 5, and one end of the brush roller 51 is provided with a fourth motor for driving the brush roller 51 to rotate. The fourth motor adopts a commercially available motor.

[0070] A liquid adding box 52 is provided at the bottom of the water retaining box 5. The left and right ends of the liquid adding box 52 pass through the chute provided on the left and right side walls of the water retaining box 5.

[0071] like Figure 11 As shown, sleeves 53 are provided on the right side of the two cams 25. The two sleeves 53 are fixedly connected to the mounting platform 1 through connecting columns. A slide rod 54 is provided inside the sleeve 53 for rotating in conjunction with the cam 25 to slide back and forth left and right.

[0072] like Figure 14 As shown, the left end of the slide rod 54 contacts the cam 25, and the right end of the slide rod 54 passes through the top surface of the sleeve 53 and is fixedly connected to the liquid adding box 52. A stopper is fixedly sleeved on the slide rod 54 located in the sleeve 53, and a spring is sleeved on the slide rod 54 between the stopper and the top surface of the sleeve 53;

[0073] like Figure 13 As shown, a liquid outlet is provided on the side wall of the liquid adding box 52 close to the arc-shaped electrolytic cell 2, and a sealing rod is provided in the liquid outlet for controlling the opening of the liquid outlet by means of the reciprocating sliding of the liquid adding box 52. One end of the sealing rod passes through the liquid outlet, and the other end of the sealing rod passes through the side wall of the liquid adding box 52 and is fixedly connected to the water retaining box 5.

[0074] The working principle of the above structure is as follows: by starting the fourth motor, the brush roller 51 can be rotated to brush the electrolyte on the surface of the copper foil. At the same time, when the rotating shaft 23 rotates, the cam 25 will be driven to rotate. The slide bar 54 slides back and forth left and right under the joint action of the cam 25 and the spring, and drives the liquid adding box 52 to reciprocate left and right. When the liquid adding box 52 moves to the left, the sealing rod is separated from the liquid outlet. At this time, the liquid outlet is opened, and the electrolyte in the liquid adding box 52 flows into the arc-shaped electrolytic cell 2 through the liquid outlet.

Claims

1. A device for preparing microporous copper foil, characterized in that: The device comprises a mounting platform (1) and an arc-shaped electrolytic cell (2) provided on the mounting platform (1); a plurality of supporting legs are provided on the bottom surface of the mounting platform (1); An anode plate (21) is provided on the inner wall of the arc-shaped electrolytic cell (2), and a cathode roller (22) is provided in the arc-shaped electrolytic cell (2). A plurality of insulating protrusions are provided on the roller surface of the cathode roller (22), and a rotating shaft (23) for rotationally connecting with the side wall of the electrolytic cell (2) is provided at the center of the cathode roller (22). Both ends of the rotating shaft (23) pass through the side wall of the electrolytic cell (2) and extend to the outside of the mounting platform (1), and a second pulley (231) is provided at one end of the rotating shaft (23). A first motor is provided on the bottom surface of the mounting platform (1), and a first pulley (24) for cooperating with the second pulley (231) for belt transmission connection is provided on the output shaft of the first motor. A winding device for winding up the copper foil is provided on the top surface of the mounting platform (1) located on one side of the arc-shaped electrolytic cell (2). A cleaning device (3) for cleaning the electrolyte on the surface of the copper foil is provided above the mounting platform (1) between the winding device and the arc-shaped electrolytic cell (2). The cleaning device (3) is arranged in parallel with the cathode roller (22). The cleaning device (3) comprises two sponge rollers (31). The two sponge rollers (31) are respectively a first sponge roller and a second sponge roller, and the second sponge roller is located directly below the first sponge roller. First mounting plates are provided on both sides of the mounting platform (1). Axles (32) corresponding to the positions of the two sponge rollers (31) are provided between the two first mounting plates. Cranks for rotationally connecting to the two ends of the two sponge rollers (31) are fixedly connected to the two axles (32), and a second motor is provided at one end of each of the two sponge rollers (31). An extrusion device (4) is provided on a mounting platform (1) located between a cleaning device (3) and an arc-shaped electrolytic cell (2). The extrusion device (4) is arranged in parallel with the cleaning device (3), and the extrusion device (4) comprises fixed plates (43) provided on both sides of the mounting platform (1). One side of the two fixed plates (43) is provided with an extrusion box (41) for extruding a first sponge roller and an extrusion block (42) for extruding a second sponge roller. The two fixed plates (43) are fixedly connected to both ends of the extrusion box (41) and both ends of the extrusion block (42) respectively through pneumatic rods (45) provided therein. Cams (25) are sleeved on both ends of the rotating shaft (23) at corresponding positions of the two fixed plates (43). A groove for placing the two cams (25) is provided on the mounting platform (1). An air cylinder (44) is provided on one side of the two cams (25) close to the fixed plate (43). The two air cylinders (44) are fixedly connected to the mounting platform (1). A piston is slidingly and sealedly connected inside the air cylinder (44). A push rod is provided at one end of the piston for rotating and pushing the piston to slide back and forth by the cam (25). The push rod is in contact with the cam (25). The other end of the piston is connected to the top surface of the air cylinder (44) through a spring. The two air cylinders (44) are respectively connected to the air pressure rod (45) in the fixed plate (43) on the corresponding side. A water retaining box (5) for covering the cathode roller (22) is provided on the mounting platform (1) located on the other side of the arc-shaped electrolytic cell (2), and a brush roller (51) for scrubbing electrolyte on the surface of the copper foil is provided in the water retaining box (5), and both ends of the brush roller (51) are rotatably connected to the side wall of the water retaining box (5), and a fourth motor for driving the brush roller (51) to rotate is provided at one end of the brush roller (51); A liquid adding box (52) for adding electrolyte is provided at the bottom of the water retaining box (5), and both ends of the liquid adding box (52) pass through a slide groove provided on the side wall of the water retaining box (5); A sleeve (53) is provided on one side of the two cams (25) close to the water retaining box (5), and the two sleeves (53) are fixedly connected to the mounting platform (1). A slide bar (54) is provided in the sleeve (53) for reciprocating sliding by rotating with the cam (25), one end of the slide bar (54) contacts the cam (25), and the other end of the slide bar (54) passes through the top surface of the sleeve (53) and is fixedly connected to the liquid adding box (52). A stopper is fixedly sleeved on the slide bar (54) located in the sleeve (53), and a spring is sleeved on the slide bar (54) between the stopper and the top surface of the sleeve (53); A liquid outlet is provided on the side wall of the liquid adding box (52) close to the arc-shaped electrolytic cell (2). A sealing rod is provided in the liquid outlet for controlling the opening of the liquid outlet by means of the reciprocating sliding of the liquid adding box (52). One end of the sealing rod passes through the liquid outlet, and the other end of the sealing rod passes through the side wall of the liquid adding box (52) and is fixedly connected to the water retaining box (5).

2. The device for preparing microporous copper foil according to claim 1, characterized in that: The winding device comprises a winding roller (11), the winding roller (11) is arranged parallel to the cathode roller (22), and the two ends of the winding roller (11) are respectively rotatably connected to the second mounting plates provided on both sides of the mounting platform (1), and a third motor is provided at one end of the winding roller (11).

3. The device for preparing microporous copper foil according to claim 1, characterized in that: A drying device is provided on the mounting platform (1) between the winding device and the cleaning device (3), and the drying device comprises two parallel heating plates (12), and the two ends of the two heating plates (12) are respectively fixedly connected to third mounting plates provided on both sides of the mounting platform (1).

4. The device for preparing microporous copper foil according to claim 1, characterized in that: A water storage tank is provided on the mounting platform (1) below the cleaning device (3).

5. The device for preparing microporous copper foil according to claim 1, characterized in that: One end of the squeeze box (41) is provided with a water outlet pipe communicating with the interior thereof.

6. The device for preparing microporous copper foil according to claim 1, characterized in that: The two ends of the two shafts (32) are rotatably connected to the two first mounting plates respectively, and one end of each of the two shafts (32) passes through the first mounting plate and is fixedly sleeved with a gear (33), the two gears (33) are engaged with each other, and the other end of one of the shafts (32) is provided with a stepping motor for driving the rotation thereof.

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