Pole piece processing and manufacturing device

Abstract

The utility model discloses a pole piece processing and manufacturing device, and relates to the technical field of battery pole piece manufacturing. The processing and manufacturing device comprises a processing chamber and a magnetic attraction part, the magnetic attraction part is arranged in the processing chamber, an air outlet device is further arranged in the processing chamber, the magnetic attraction part is embedded in the lower end of the air outlet device, a pole piece moving path is further arranged below the magnetic attraction part, and the magnetic attraction part forms a magnetic field in the vertical direction. And the conductive magnetic particles in the slurry coating on the pole piece on the pole piece moving path are mutually and vertically adsorbed and connected under the action of magnetic force so as to form a conductive path, and are cured under the air drying action of the air outlet device. According to the pole piece processing and manufacturing device disclosed by the utility model, the pole piece coated with the slurry with the conductive magnetic particles passes through the lower part of the magnetic attraction piece, so that the conductive magnetic particles are aligned and connected with one another under the action of magnetic force; and the air outlet device also synchronously aims at the pole piece in the magnetic field to blow air so as to dry and cure the conductive magnetic particles in the slurry, so that the conductive performance of the pole piece is stably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pole piece manufacturing technical field especially relates to a pole piece's processing and manufacturing device. BACKGROUND

[0002] The ideal conducting path of lithium ions in the electrode is a straight moving path, while the conventional electrode used in lithium ion batteries and composed of isotropic particles usually contains 30% to 40% porosity, and these pores basically have a tortuosity of 3 to 5, so the lithium ion conductivity of the conventional battery electrode is low.

[0003] To this end, by adding conductive magnetic particles to the slurry, coating the special slurry with conductive magnetic particles on the electrode foil, and exposing the pole piece coated with special slurry to a magnetic field, some of the conductive magnetic particles in the slurry are aligned and adsorbed in the magnetic field, forming a vertically aligned ion conducting pole piece moving path in the slurry coating, thereby improving the conductivity of the pole piece.

[0004] However, this prior art is limited to method theoretical design, and since the wet slurry has poor fixing effect on the interconnected conductive magnetic particles, the conductive magnetic particles will disperse from each other again with the flow of the wet slurry after leaving the magnetic field, resulting in poor conductivity of the pole piece, and the method of improving the conductivity of the pole piece by the magnetic field becomes unstable, making it difficult to achieve stable large-scale industrial production of the pole piece by innovative devices. UTILITY MODEL CONTENTS

[0005] The utility model provides a pole piece's processing and manufacturing device, through with the slurry with the conductive magnetic particle of banding coating pole piece from the below of magnetic attraction piece, make the conductive magnetic particle mutually align under the action of magnetic force and connect, and the air blower still synchronously aligns the pole piece in the magnetic field and blows, to dry solidification conductive magnetic particle in the slurry, thereby stably improving the conductivity of the pole piece, to solve above -mentioned technical problem.

[0006] The technical scheme for solving the above problems is to provide a pole piece's processing and manufacturing device, the device includes a treatment chamber, a magnetic attraction piece, the magnetic attraction piece is arranged in the treatment chamber, an air blower is further arranged in the treatment chamber, the magnetic attraction piece is embedded at the lower end of the air blower, a pole piece moving path is further arranged below the magnetic attraction piece, the magnetic attraction piece forms a magnetic field in the vertical direction, the conductive magnetic particles in the slurry coating on the pole piece on the pole piece moving path are vertically adsorbed and connected to form a conductive path under the action of magnetic force, and are solidified under the air drying action of the air blower.

[0007] Further, the magnetic attraction piece is an electromagnet, and a control switch for adjusting the magnetic force is further arranged on the outer wall of the treatment chamber.

[0008] Further, the magnetic attraction members are provided in plurality, and the plurality of magnetic attraction members are equidistantly arranged in the horizontal direction in the processing chamber.

[0009] Further, a vertical air outlet is arranged on the air outlet device, and the upper end of the air outlet is connected with the air supply equipment through a ventilation pipeline.

[0010] Further, a heating sheet is arranged in the ventilation pipeline.

[0011] Further, an adjusting valve for adjusting the air volume is further arranged on the ventilation pipeline.

[0012] Further, an air suction port is further arranged on the side wall of the processing chamber, and the air suction port is connected with the air suction machine through an air suction pipeline.

[0013] Further, the air suction port is flush with the pole piece moving path.

[0014] Further, the air suction pipeline is arranged in the water cooling box, and the lower part of the end of the air suction pipeline connected with the air suction machine is further connected with a condensate recovery container.

[0015] Further, a plurality of supporting members for supporting the pole piece are further arranged on the lower side of the pole piece moving path.

[0016] The beneficial effects of the utility model are as follows:

[0017] The pole piece processing and manufacturing device of the utility model embodiment is characterized in that: a plurality of magnetic attraction members are arranged in the processing chamber, so as to manufacture a magnetic field for vertically connecting the conductive magnetic particles to each other; when the pole piece moves along the pole piece moving path and passes below the magnetic attraction members, the slurry coating on the pole piece is also rapidly dried under the blowing of the heating warm air in the processing chamber, so that the plurality of conductive magnetic particles are kept in the solidified state of being vertically connected to each other, thereby ensuring that the conductive performance of the pole piece can be stably improved.

[0018] In addition, during the drying process of the pole piece, the liquid solvent in the slurry coating of the pole piece is also first absorbed by the air suction machine after being heated and volatilized, so as to avoid the safety problem of chemical material leakage; and the gas mixed with gaseous solvent is also passed through the water cooling box, and the gaseous solvent in the water cooling box is cooled and solidified to enter the recovery container for recycling, thereby reducing material loss. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings:

[0020] Figure 1 Structure diagram of processing and manufacturing device for pole piece of the embodiment;

[0021] Figure 2 Structure diagram of air outlet device of the embodiment;

[0022] 11 - processing chamber, 12 - pole piece moving path;

[0023] 21 - magnetic attraction element, 22 - control switch;

[0024] 31 - air outlet device, 32 - air outlet, 33 - ventilation duct, 34 - heating sheet, 35 - regulating valve, 36 - air supply device;

[0025] 41 - air suction port, 42 - air suction duct, 43 - air suction fan, 44 - water cooling tank, 45 - condensate recovery container;

[0026] 5 - supporting element, 6 - pole piece. DETAILED DESCRIPTION

[0027] In this specification, the orientation terms such as up, down, left, right, front, back, front face, back face, top, bottom, etc. are defined with respect to the configuration shown in the drawings, and the words "inner" and "outer" refer to the direction toward or away from the geometric center of a particular component, which are relative concepts, and thus can change accordingly depending on the different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0028] Please refer to Figure 1The utility model discloses a kind of processing and manufacturing devices of pole piece of specific embodiment, the processing and manufacturing device of pole piece includes processing chamber 11, magnetic attraction piece 21, magnetic attraction piece 21 is multiple long strip electromagnet, multiple electromagnet is equidistantly arranged in processing chamber 11 along horizontal direction, the left and right ends of processing chamber 11 are oppositely provided with opening, the lower side of magnetic attraction piece 21 is pole piece moving path 12;For this, technical personnel can energize magnetic attraction piece 21, make the pole piece corresponding to the slurry coated with conductive magnetic particles from one end opening of processing chamber 11 into processing chamber 11, then make pole piece along pole piece moving path 12 to leave from the other end opening of processing chamber 11, and pole piece in the process of passing the lower side of multiple magnetic attraction pieces 21, under the joint action of external magnetic field and its gravity, part of conductive magnetic particles in slurry coating on pole piece will produce rotation and mutually adsorb and connect along vertical direction, to form the conductive path of vertical direction on pole piece, make that lithium ion transmission resistance greatly reduces, to optimize battery kinetics performance.

[0029] In some embodiments, magnetic attraction piece 21 can also be set as long strip permanent magnet, for example, neodymium magnet.

[0030] In some embodiments, to meet the magnetic processing needs of different models of pole piece, control switch 22 for adjusting the magnetic force size of magnetic attraction piece 21 is also installed on the outer wall of processing chamber 11, since magnetic attraction piece 21 is electromagnet, control switch 22 can actually also be understood as knob switch for adjusting the current size, that is, technical personnel control adjustment magnetic force size of magnetic attraction piece 21 by rotating control switch 22, to make different size conductive magnetic particles in coating on different models of pole piece mutually adsorb and connect.

[0031] In some embodiments, to ensure that conductive magnetic particles in coating do not move again after mutually adsorb and connect in magnetic field, air outlet 31 is also arranged in processing chamber 11 towards pole piece moving path 12, and moreover, to save installation space inside processing chamber 11, the lower end of one magnetic attraction piece 21 is fixedly installed one air outlet 31, and air outlet 31 is vertically provided with several air outlets 32 around the lower end of magnetic attraction piece 21, the upper end of several air outlets 32 is connected with air supply equipment 36 using ventilation duct 33, and air supply equipment 36 can be regarded as air blower. For this, when pole piece enters processing chamber 11, air supply equipment 36 drives air to flow vertically downward from air outlet 32 along ventilation duct 33, to make slurry coating on pole piece dry and solidify quickly, to solidify the adsorption and connection state of conductive magnetic particles.

[0032] In the embodiment, air outlet 32 is vertical hole provided on air outlet 31, and the upper end of air outlet 32 is connected with ventilation duct 33, and the lower end is arranged towards pole piece moving path 12.

[0033] In some embodiments, in order to further accelerate the drying speed of the slurry coating, the air duct 33 is also provided with a powered heating sheet 34, which can heat the air in the air duct 33 when powered on, and the heated air flows out of the air outlet 32 to promote the rapid drying and solidification of the slurry layer; in addition, in order to precisely control the drying and solidification time and prevent the slurry coating from being blown away by excessive wind, the air duct 33 is also provided with an adjusting valve 35 for adjusting the air volume.

[0034] In some embodiments, in order to prevent the chemical solvent in the slurry coating from flowing out of the two end openings of the treatment chamber 11 along the flowing air after being heated and vaporized, causing chemical pollution safety problems, the front and rear sidewalls of the treatment chamber 11 are also flush with the pole piece moving path 12 to open the air suction port 41, which is connected to the air suction pump 43 through the air suction duct 42, and the air suction pump 43 is operated synchronously with the air supply device 36, and the air suction pump 43 can generate negative pressure at the air suction port 41 when operating, so that the air flowing out of the air outlet 32 flows to the two sides of the pole piece after reaching the pole piece to enter the air suction port 41, thereby forming a fixed air flow path, so that the vaporized chemical solvent also flows along the air suction port 41 into the air suction duct 42. Moreover, the vaporized chemical solvent first flows through the low-temperature duct portion wrapped by the water-cooled tank 44 after entering the air suction duct 42, to re-condense into liquid solvent, and flows into the condensate recovery container 45 along the air suction duct 42, to further realize the recovery of the chemical solvent in the slurry.

[0035] In order to facilitate the flow of liquid chemical solvent in the air suction duct 42, the air suction duct 42 is inclined, the condensate recovery container 45 is arranged close to the air suction pump 43, and the condensate recovery container 45 is arranged at the inclined lower end position of the air suction duct 42.

[0036] In some embodiments, in order to facilitate the movement of the pole piece, the lower side of the pole piece moving path 12 is also provided with a plurality of supporting members 5 for supporting the pole piece, the supporting members 5 are circular rods that can automatically rotate, and a plurality of supporting members 5 are also arranged equidistantly in the horizontal direction in the treatment chamber 11 to guide the movement of the pole piece.

[0037] The above-mentioned matters not mentioned are applicable to the prior art.

[0038] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An apparatus for processing and manufacturing electrode sheets, characterized in that, The device comprises a processing chamber (11), a magnetic attraction element (21) arranged in the processing chamber (11), and an air outlet device (31) arranged in the processing chamber (11), wherein the magnetic attraction element (21) is embedded in the lower end of the air outlet device (31), and a pole piece moving path (12) is arranged below the magnetic attraction element (21), the magnetic attraction element (21) forms a magnetic field in the vertical direction, and the conductive magnetic particles in the slurry coating on the pole piece on the pole piece moving path (12) are vertically attracted and connected to each other under the action of the magnetic force to form a conductive path, and are solidified under the air drying action of the air outlet device (31).

2. The apparatus according to claim 1, wherein The magnetic attraction element (21) is an electromagnet, and a control switch (22) for adjusting the magnetic force is arranged on the outer wall of the processing chamber (11).

3. The apparatus of claim 1, wherein The magnetic attraction element (21) is arranged in multiple, and the multiple magnetic attraction elements (21) are equidistantly arranged in the horizontal direction in the processing chamber (11).

4. The apparatus of claim 1 wherein, The air outlet device (31) is vertically provided with an air outlet (32), and the upper end of the air outlet (32) is connected to a air supply device (36) through a ventilation pipeline (33).

5. The apparatus according to claim 4, wherein The ventilation pipeline (33) is provided with a heating sheet (34).

6. The apparatus according to claim 4, wherein The ventilation pipeline (33) is further provided with an adjusting valve (35) for adjusting the air volume.

7. The apparatus of claim 1 wherein, The side wall of the processing chamber (11) is further provided with an air suction port (41), and the air suction port (41) is connected to an air suction fan (43) through an air suction pipeline (42).

8. The apparatus according to claim 7, wherein The air suction port (41) is flush with the pole piece moving path (12).

9. The apparatus according to claim 7, wherein The air suction pipeline (42) is arranged in a water cooling box (44), and the lower part of the end of the air suction pipeline (42) connected to the air suction fan (43) is further connected to a condensate recovery container (45).

10. The apparatus of claim 1 wherein, The lower side of the pole piece moving path (12) is further provided with multiple supporting elements (5) for supporting the pole piece.

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