Online vacuum defoaming circulating device for carbon foil-coated conductive slurry of lithium battery

Abstract

The utility model discloses an on-line vacuum defoaming circulating device for conductive slurry for coating carbon foil on a lithium battery. The on-line vacuum defoaming circulating device comprises a centrifugal vacuum sealing hopper, a conductive slurry raw material barrel and a coating machine material basin, the centrifugal vacuum sealing hopper is in an inverted cone shape, a hopper feeding opening is formed in one side of the top of the centrifugal vacuum sealing hopper, a vacuum pumping opening is formed in the other side, and the vacuum pump is arranged outside the centrifugal vacuum sealing hopper through the vacuum pumping opening. A hopper discharge hole is formed in the bottom of the centrifugal vacuum sealing hopper; the top of the conductive slurry raw material barrel is provided with a circulating discharge port, and the bottom is provided with a circulating feed port; a discharging quick connector is arranged at the upper end of the side part of the coating machine material basin, and a feeding quick connector is arranged at the lower end; the whole set of on-line vacuum defoaming circulating device can realize uninterrupted feeding, centrifugal rotating defoaming, on-line vacuum negative pressure defoaming and discharging, defoaming and automatic production circulation can be realized, the production efficiency and the production quality are greatly improved, and the labor cost and the time cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a slurry defoaming device, especially a lithium battery carbon-coated foil conductive slurry on-line vacuum defoaming circulating device. BACKGROUND

[0002] The conductive coating of the lithium battery carbon-coated foil is a functional material coating for improving the conductivity of the positive and negative materials of the lithium battery. It is usually applied to the surface of the positive and negative current collectors to improve the conductivity and cycle life of the current collectors. Therefore, the preparation process and quality of the carbon-coated foil conductive coating are very important to the performance of the lithium battery, and it is necessary to ensure that there is no color difference or leakage of the lithium battery carbon-coated foil conductive coating.

[0003] However, due to the particularity of the carbon-coated foil conductive coating slurry, air bubbles and microbubbles are easily generated during the slurry preparation process and the production coating process. The air bubbles and microbubbles cause the partial air bubble burst of the screen roller during the gravure coating, resulting in material shortage and coating leakage. Therefore, it is necessary to ensure that the conductive slurry does not contain air bubbles and microbubbles, and the conductive slurry in the coating basin does not contain air bubbles and microbubbles after circulation, so as to improve the surface quality of the carbon-coated foil conductive coating for lithium batteries. SUMMARY

[0004] The utility model solves the technical problem of the prior art, and provides a lithium battery carbon-coated foil conductive slurry on-line vacuum defoaming circulating device. The lithium battery carbon-coated foil conductive slurry on-line vacuum defoaming circulating device solves the problem that the air bubbles in the conductive slurry cannot be eliminated during the use of the lithium battery carbon-coated foil conductive slurry, thereby affecting the surface effect of the lithium battery carbon-coated foil and causing product scrap.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A lithium battery carbon-coated foil conductive slurry on-line vacuum defoaming circulating device, comprising a centrifugal vacuum sealed hopper, a conductive slurry raw material barrel and a coating machine material basin.

[0007] The centrifugal vacuum sealed hopper is inverted conical, a hopper inlet is formed on one side of the top of the centrifugal vacuum sealed hopper, and a vacuum extraction port is formed on the other side.

[0008] A hopper outlet is formed at the bottom of the centrifugal vacuum sealed hopper.

[0009] A circulating outlet is formed at the top of the conductive slurry raw material barrel, and a circulating inlet is formed at the bottom.

[0010] A discharge quick connector is installed on the upper end of the side of the coating machine material basin, and an inlet quick connector is installed on the lower end.

[0011] One end of pipeline A is connected with the circulating discharge port, and the other end is connected with the hopper inlet.

[0012] One end of pipeline B is connected with the hopper discharge port, and the other end is connected with the inlet quick connector.

[0013] One end of pipeline C is connected with the discharge quick connector, and the other end is connected with the circulating inlet.

[0014] A high-speed dispersion motor is arranged at the top center position of the centrifugal vacuum sealed hopper, and a transmission rod of the high-speed dispersion motor extends through the top of the centrifugal vacuum sealed hopper to the inside of the hopper, and a stirring rod is fixedly connected to the bottom end of the transmission rod, and a high-speed cutting flow guide material guiding disc is arranged at the bottom end of the stirring rod.

[0015] A material receiving box body is arranged at the connection position of the high-speed dispersion motor transmission rod and the stirring rod, and a plurality of dispersion through holes are uniformly arranged on the side of the material receiving box body.

[0016] A circular ring-shaped material receiving port is formed at the top of the material receiving box body.

[0017] Pipeline A extends inwardly through the hopper inlet and extends to the circular ring-shaped material receiving port.

[0018] The material receiving box body is formed by combining a box cover body and a box main body, and a circular ring-shaped material receiving port is formed at the top of the combined material receiving box body.

[0019] The box cover body is provided with a center hole A for assembly and fixation with the transmission rod.

[0020] The box main body is provided with a center hole B for assembly and fixation with the stirring rod.

[0021] The flow guide material guiding disc is tightly installed with the bottom of the material receiving box, and the peripheral size of the flow guide material guiding disc is larger than the size of the material receiving box; the flow guide material guiding disc is provided with a center hole C for assembly and fixation with the stirring rod.

[0022] Electric peristaltic pumps A, B and C are arranged on pipelines A, B and C respectively, and filter structures are arranged in the pipelines.

[0023] A plurality of small holes are arranged on the surface of the high-speed cutting flow guide material guiding disc, and sawtooth-shaped metal dispersion pieces with consistent inclination direction are arranged on the side of the surface and the lower side of the surface.

[0024] The sawtooth-shaped metal dispersion pieces on the upper and lower sides of the surface of the high-speed cutting flow guide material guiding disc are arranged in a staggered manner.

[0025] The high-speed cutting flow guide material guiding disc is provided with double layers.

[0026] The centrifugal vacuum sealed hopper adopts magnetic fluid vacuum sealing; the hopper inlet and the hopper outlet also adopt magnetic fluid vacuum sealing.

[0027] The centrifugal vacuum sealed hopper is designed with a cone of 30-45 degrees, and is made of 304 stainless steel.

[0028] The PLC control system is arranged outside the centrifugal vacuum sealed hopper.

[0029] The utility model has the following beneficial effects:

[0030] 1. The complete online vacuum defoaming circulating device can continuously feed, centrifugally rotate, defoam, discharge, realize defoaming and production automation circulation, greatly improve production efficiency and production quality, and reduce labor cost and time cost.

[0031] 2. The receiving box body is designed, and dispersion holes are arranged around the receiving box body; the centrifugal force generated by high-speed rotation of the motor is used to disperse the conductive slurry to the inverted conical slope side wall of the centrifugal vacuum sealed hopper through the dispersion holes; and the conductive slurry is thinned in the falling process under the influence of gravity and acceleration, so that the thickness of the slurry film is not more than 5 mm, the foam can be effectively dispersed, and the rapid defoaming effect is achieved.

[0032] 3. The flow guide material guiding disc is further designed; the conductive slurry that is not dispersed to the inverted conical slope side wall of the centrifugal vacuum sealed hopper through the dispersion holes is received by the flow guide material guiding disc with a larger peripheral size, and is further dispersed to the inverted conical slope side wall of the centrifugal vacuum sealed hopper, so that the dispersion efficiency and film thinning effect of the conductive slurry are improved.

[0033] 4. The raw material is thinned and dispersed, and centrifugal acceleration is generated at the same time through the rotation of the double-layer high-speed cutting flow guide material guiding disc; the liquid is strongly pushed to the side wall of the hopper container in the centrifugal direction; the gas phase (part containing many bubbles) with small mass of the conductive slurry is concentrated to the central part, so that the screening and separation of the foam and the liquid are realized; the raw material of the conductive slurry is thinned, impacted, screened and processed at the same time; the gas in the bubbles is discharged due to the synchronous opening of the vacuum negative pressure in the device, so that the feeding and discharging and the defoaming are synchronized, and the vacuum online defoaming process is completed; no chemical agent is used in the process, and the slurry is not polluted and deteriorated.

[0034] 5. The conveying mode of the conventional pneumatic diaphragm pump is changed, the motor driven peristaltic pump is used to convey the conductive slurry, the speed of conveying the conductive slurry is uniform, the conductive slurry has no large impact force, and the generation of bubbles can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic view of the lithium battery carbon-coated foil conductive slurry online vacuum defoaming circulating device.

[0036] Figure 2 is a centrifugal vacuum sealed hopper structure schematic diagram of the utility model of a lithium battery carbon-coated foil conductive paste online vacuum defoaming circulating device.

[0037] Among them:

[0038] 1. centrifugal vacuum sealed hopper;11. high speed dispersion motor;12. transmission rod;13. stirring rod;14. high speed cutting flow guide material guide disc;15. material receiving box body;151. box cover body;152. box main body;153. dispersion through hole;154. circular ring material receiving port;155. center hole A;156. center hole B;16. flow guide material guide disc;161. center hole C;17. hopper feed port;18. vacuum extraction port;19. hopper discharge port.

[0039] 2. conductive paste raw material barrel;21. circulating discharge port;22. circulating feed port.

[0040] 3. coating machine material basin;31. discharge quick connector;32. lower end is provided with feed quick connector.

[0041] 4. pipeline A;41. electric peristaltic pump A.

[0042] 5. pipeline B;51. electric peristaltic pump B.

[0043] 6. pipeline C;61. electric peristaltic pump C.

[0044] 7. PLC control system.

[0045] 8. support.

[0046] 9. vacuum pump. DETAILED DESCRIPTION

[0047] The utility model will be further explained in detail below in combination with the drawings and specific preferred embodiments.

[0048] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "left side", "right side", "upper part", "lower part" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, "first", "second" and the like do not represent the importance of the parts, therefore, it cannot be understood as a limitation on the utility model. The specific size adopted in the embodiment is only for the purpose of illustrating the technical scheme, and does not limit the protection scope of the utility model.

[0049] As Figure 1As shown, an on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive paste includes a centrifugal vacuum sealed hopper 1, a conductive paste raw material barrel 2 and a coating machine material basin 3.

[0050] The centrifugal vacuum sealed hopper is inverted conical, one side of the top of which is provided with a hopper feeding port 17, and the other side is provided with a vacuum extraction port 18, and a vacuum pump 9 is arranged outside the centrifugal vacuum sealed hopper through the vacuum extraction port.

[0051] The centrifugal vacuum sealed hopper is provided with a hopper discharge port 19 at the bottom.

[0052] Specifically, the centrifugal vacuum sealed hopper is designed to be conical with an angle of 30-45°, and is made of 304 stainless steel, and the whole centrifugal vacuum sealed hopper and the feeding and discharging ports are designed to be magnetofluid vacuum sealed; that is, the centrifugal vacuum sealed hopper is magnetofluid vacuum sealed, and the hopper feeding port and the hopper discharge port are also magnetofluid vacuum sealed.

[0053] Specifically, the centrifugal vacuum sealed hopper is treated with Teflon to prevent the conductive paste from solidifying and sticking to form particulate matter.

[0054] Specifically, the vacuum pump is a single-stage rotary vane vacuum pump with a power of 2.2kW and an extraction capacity of -98~0kPa. The single-stage rotary vane vacuum pump is provided, the hopper is designed to be magnetofluid vacuum sealed, the vacuum degree is kept at -98~0kpa, and the fine bubbles in the conductive paste are defoamed. In this process, no chemical agents are used to ensure that the paste will not be contaminated and deteriorated.

[0055] The conductive paste raw material barrel 2 is provided with a circulating discharge port 21 at the top and a circulating feeding port 22 at the bottom.

[0056] Specifically, the conductive paste raw material barrel is treated with Teflon to prevent the conductive paste from solidifying and sticking to form particulate matter.

[0057] The coating machine material basin 3 is provided with a discharge quick connector 31 at the upper end of the side and a feeding quick connector 32 at the lower end.

[0058] Specifically, the conductive paste raw material barrel, the centrifugal vacuum sealed hopper and the coating machine material basin are connected by pipelines to realize the circulation of the paste.

[0059] Specifically, the conductive paste raw material barrel and the centrifugal vacuum sealed hopper are connected by pipeline A4.

[0060] Specifically, the centrifugal vacuum sealed hopper and the coating machine material basin are connected by pipeline B5.

[0061] Specifically, the coating machine material basin and the conductive paste raw material barrel are connected by pipeline C6.

[0062] One end of the pipeline A is connected with the circulating discharge port, and the other end is connected with the hopper feeding port.

[0063] The pipe B is connected with the discharge port of the hopper at one end and connected with the feeding quick connector at the other end.

[0064] The pipe C is connected with the discharge quick connector at one end and connected with the circulating feeding port at the other end.

[0065] The pipes A, B and C are respectively provided with the electric peristaltic pump A41, the electric peristaltic pump B51 and the electric peristaltic pump C61, and the pipes are respectively provided with the filtering structure.

[0066] Specifically, the electric peristaltic pump A is installed on the pipe A between the conductive slurry raw material barrel and the feeding port of the vacuum sealed hopper, the electric peristaltic pump B is installed on the pipe B between the discharge port of the vacuum sealed hopper and the coating machine material basin, and the electric peristaltic pump C is installed on the pipe C between the coating machine material basin and the conductive slurry raw material barrel. The pipe can be made of stainless steel. The electric peristaltic pumps A, B and C provide the conveying power for the circulation of the conductive slurry in the device, change the conveying mode of the conventional pneumatic diaphragm pump, use the electric peristaltic pump to convey the conductive slurry, make the conveying speed of the conductive slurry uniform, and reduce the generation of air bubbles. The filtering structure further reduces the generation of air bubbles.

[0067] Specifically, the feeding quick connector and the discharge quick connector provide the purposes of fixing the feeding and discharging pipes of the coating machine material basin, and can realize quick installation and quick disassembly.

[0068] The centrifugal vacuum sealed hopper is provided with a high-speed dispersion motor 11 at the top center position, a transmission rod 12 of the high-speed dispersion motor extends through the top of the centrifugal vacuum sealed hopper to the inside of the hopper, a stirring rod 13 is fixedly connected to the bottom end of the transmission rod, and a high-speed cutting flow guide material guide disc 14 is arranged at the bottom end of the stirring rod.

[0069] Specifically, the high-speed dispersion motor is a high-speed centrifugal stirring motor, and the rotating speed is controllable at 0-3000 r / min.

[0070] A material receiving box body 15 is arranged at the connection position of the transmission rod and the stirring rod of the high-speed dispersion motor, and a plurality of dispersion through holes 153 are uniformly arranged on the side of the material receiving box body.

[0071] A circular ring-shaped material receiving port 154 is formed at the top of the material receiving box body.

[0072] The pipe A extends inwardly through the feeding port of the hopper and extends to the circular ring-shaped material receiving port.

[0073] Specifically, the conductive slurry is conveyed to the upper part of the centrifugal vacuum sealed hopper through the pipe A, the pipe A extends inwardly through the feeding port of the hopper and extends to the circular ring-shaped material receiving port, the circular ring-shaped material receiving port rotates with the rotation of the material receiving box body, the pipe A extending to the circular ring-shaped material receiving port can normally feed, and will not interfere with the rotation of the circular ring-shaped material receiving port.

[0074] Specifically, by designing the receiving box body with dispersed through holes around the receiving box body, the conductive paste is dispersed to the side wall of the inverted cone of the centrifugal vacuum sealed hopper through the centrifugal force generated by the high-speed operation of the motor, and the conductive paste forms a film in the process of falling under the influence of gravity and acceleration, the thickness of the film is not more than 5mm, which can effectively disperse the foam and achieve the effect of rapid defoaming.

[0075] The receiving box body 15 is formed by combining the box cover body 151 and the box main body 152, and the top of the combined receiving box body is formed with a circular receiving port.

[0076] The box cover body is provided with a center hole A155 for assembly and fixation with the transmission rod.

[0077] The box main body is provided with a center hole B156 for assembly and fixation with the stirring rod.

[0078] It also includes a flow guide material guide plate 16, which is installed in close contact with the bottom of the receiving box and has a larger peripheral size than the receiving box; the flow guide material guide plate is provided with a center hole C161 for assembly and fixation with the stirring rod.

[0079] Specifically, by further designing the flow guide material guide plate, the part of the conductive paste that does not pass through the dispersed through holes to the side wall of the inverted cone of the centrifugal vacuum sealed hopper is caught by the flow guide material guide plate with a larger peripheral size and is further dispersed to the side wall of the inverted cone of the centrifugal vacuum sealed hopper, thereby improving the dispersion efficiency and film formation effect of the conductive paste.

[0080] Further, a plurality of small holes are provided on the surface of the high-speed cutting flow guide material guide plate, and the surface is provided with sawtooth-shaped metal dispersion pieces with consistent inclination direction.

[0081] The sawtooth-shaped metal dispersion pieces on the upper and lower periphery of the surface of the high-speed cutting flow guide material guide plate are arranged alternately.

[0082] The high-speed cutting flow guide material guide plate is provided with double layers.

[0083] Specifically, a plurality of small holes are provided on the surface of the high-speed cutting flow guide material guide plate, and the small holes on the high-speed flow guide material guide plate are mainly used to realize the refinement of particles and enhance the dispersion effect. In the process of high-speed dispersion, the material is discharged through the small holes, thereby realizing shearing action, forming turbulent flow, and further refining the particles in the conductive paste.

[0084] Specifically, the high-speed cutting flow guide material guide disc is provided with sawtooth-shaped metal dispersion pieces with consistent tilting directions on the upper and lower circumferential sides of the disc surface; and the sawtooth-shaped metal dispersion pieces on the upper and lower circumferential sides of the disc surface are staggered. The main body side of the flow guide material guide disc is provided with sawtooth-shaped metal dispersion pieces on the upper and lower layers; the tilting directions of the upper layer of sawtooth-shaped metal dispersion pieces are consistent, the tilting directions of the lower layer of sawtooth-shaped metal dispersion pieces are consistent, and the upper and lower layers are staggered, thereby accelerating the mixing effect.

[0085] Specifically, the high-speed cutting flow guide material guide disc is provided with double layers with a diameter of 120 mm. The centrifugal force generated by the high-speed operation of the high-speed dispersion motor causes the slurry to not precipitate and flocculate in the hopper, and at the same time, the solid carbon black material in the conductive slurry is more uniform in structure.

[0086] Specifically, the vacuum liquid and bubble phase separation: the conductive slurry raw material supplied from the electric peristaltic pump A is dispersed by the centrifugal dispersion of the receiving box body and the flow guide material guide disc, and the slurry is thinned to achieve rapid defoaming; further, through the rotation of the double-layer high-speed cutting flow guide material guide disc, the raw material is dispersed and thinned at the same time, and the liquid is strongly pushed to the hopper container side wall in the centrifugal direction. The conductive slurry is thrown into the central part, so that the foam and liquid separation work is realized. Vacuum defoaming: while the conductive slurry raw material completes the processes such as thinning, impact, and screening, the vacuum negative pressure in the device is simultaneously opened, which leads to the gas in the bubbles, thereby realizing the synchronous process of feeding and defoaming.

[0087] It also includes a PLC control system 7 installed outside the centrifugal vacuum sealed hopper.

[0088] Specifically, the PLC control system adopts a Siemens microprogrammable controller S7-200, and uses a mature thyristor trigger circuit tc787, and the display circuit adopts a td200 of Siemens to complete the following functions: first, parameter setting, such as excitation time, backup excitation, and strong excitation time, to select the operation mode; second, working state display, to display the operation mode; third, fault display. The PLC control system realizes the automatic control of the whole process in a cycle. Under the control of the PLC, the conductive slurry can be automatically dispersed and defoamed in a cycle during the preparation of the lithium battery carbon-coated foil, which ensures the processing quality of the slurry and indirectly improves the overall quality of the lithium battery, and can be applied to the coating production of various functional slurries matched with current collectors.

[0089] Further, the lithium battery carbon-coated foil conductive slurry online vacuum defoaming circulating device is supported and installed by a support 8.

[0090] Further, the utility model provides a kind of working procedure of lithium battery carbon-coated foil conductive slurry online vacuum defoaming circulation device:

[0091] S1, motor peristaltic pump A extracts conductive slurry in conductive slurry raw material barrel, and is transported to centrifugal vacuum closed hopper to carry out high-speed centrifugal rotation, and realizes online vacuum negative pressure defoaming by vacuum pump.

[0092] S11, conductive slurry is transported to the upper portion of centrifugal vacuum sealed hopper by pipeline A, and pipeline A extends inward by hopper inlet, and extends to circular ring material receiving port.

[0093] By designing material receiving box body, dispersion through hole is formed around material receiving box body, and by centrifugal force generated by high-speed operation of motor, conductive slurry is dispersed to the side wall of inverted taper slope of centrifugal vacuum sealed hopper through dispersion through hole, and under the influence of gravity and acceleration, conductive slurry forms filmization in the process of falling, and the thickness of slurry filmization is not more than 5mm, which can effectively disperse foam and achieve rapid defoaming effect.

[0094] By further designing flow guide material receiving disc, for the conductive slurry that is not dispersed to the side wall of inverted taper slope of centrifugal vacuum sealed hopper through dispersion through hole, the part of slurry is caught by flow guide material receiving disc with larger peripheral size, and is further dispersed to the side wall of inverted taper slope of centrifugal vacuum sealed hopper, so as to improve the dispersion efficiency and filmization effect of feed conductive slurry.

[0095] S12, by the rotation of double-layer high-speed cutting flow guide material receiving disc, the raw material is dispersed and filmized at the same time, and centrifugal acceleration is generated, and liquid is strongly pushed to the side wall of hopper container in centrifugal direction. The conductive slurry that is poured, the gas phase (part containing many bubbles) with small mass is concentrated to the central part, so that the screening and separation work of foam and liquid is realized. While the conductive slurry raw material completes filmization, impact, screening and other processes, due to the synchronous opening of vacuum negative pressure in the device, the gas in bubble is discharged, so as to realize the synchronous process of feeding and defoaming, that is, the vacuum online defoaming process is completed.

[0096] S2, defoamed raw material in vacuum closed hopper is transported to coating machine material basin by motor peristaltic pump B to carry out coating production.

[0097] Conductive slurry is transported to conductive slurry raw material barrel by motor peristaltic pump C, so as to continue defoaming circulation to coating machine for use, so as to realize slurry circulation of lithium battery carbon-coated foil conductive slurry online vacuum defoaming circulation device.

[0098] The whole defoaming circulating device can continuously feed, defoam and discharge, can realize defoaming and production automation circulation, greatly improves production efficiency and production quality, and reduces labor cost and time cost.

[0099] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0100] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept of the present application, various equivalent transformations of the technical solutions of the present application can be made, and these equivalent transformations all belong to the protection scope of the present application.

Claims

1. An on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive paste, characterized in that: The centrifugal vacuum sealed hopper, the conductive slurry raw material barrel and the coating machine material basin are included. The centrifugal vacuum sealed hopper is inverted conical, and a hopper feeding port is formed on one side of the top of the centrifugal vacuum sealed hopper, and a vacuum extraction port is formed on the other side of the top of the centrifugal vacuum sealed hopper. A hopper discharging port is formed on the bottom of the centrifugal vacuum sealed hopper. A circulating discharging port is formed on the top of the conductive slurry raw material barrel, and a circulating feeding port is formed on the bottom of the conductive slurry raw material barrel. A discharging quick connector is arranged on the upper end of the side of the coating machine material basin, and a feeding quick connector is arranged on the lower end of the side of the coating machine material basin. One end of the pipeline A is connected with the circulating discharging port, and the other end of the pipeline A is connected with the hopper feeding port. One end of the pipeline B is connected with the hopper discharging port, and the other end of the pipeline B is connected with the feeding quick connector. One end of the pipeline C is connected with the discharging quick connector, and the other end of the pipeline C is connected with the circulating feeding port. A high-speed dispersion motor is arranged at the central position of the top of the centrifugal vacuum sealed hopper, a transmission rod of the high-speed dispersion motor extends to the inside of the hopper through the top of the centrifugal vacuum sealed hopper, a stirring rod is fixedly connected to the bottom end of the transmission rod, and a high-speed cutting flow guide material guiding disc is arranged on the bottom end of the stirring rod. A material receiving box body is arranged at the connecting position of the transmission rod and the stirring rod, and a plurality of dispersion through holes are uniformly formed on the peripheral side of the material receiving box body. A circular ring-shaped material receiving port is formed on the top of the material receiving box body. The pipeline A extends inwardly through the hopper feeding port and extends to the circular ring-shaped material receiving port.

2. The on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive paste according to claim 1, characterized in that: The material receiving box body is formed by combining a box cover body and a box main body, and a circular ring-shaped material receiving port is formed on the top of the combined material receiving box body. A central hole A is formed on the box cover body and is used for assembling and fixing the transmission rod. A central hole B is formed on the box main body and is used for assembling and fixing the stirring rod.

3. The on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive slurry according to claim 2, characterized in that: The flow guide material guiding disc is tightly fitted and mounted on the bottom of the material receiving box body, and the peripheral size of the flow guide material guiding disc is larger than the size of the material receiving box body.

4. The on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive paste according to claim 1, characterized in that: An electric peristaltic pump A, an electric peristaltic pump B and an electric peristaltic pump C are arranged on the pipeline A, the pipeline B and the pipeline C respectively, and a filtering structure is arranged in each of the pipelines.

5. The on-line vacuum defoaming circulation device for lithium battery carbon-coated foil conductive paste according to claim 1, characterized in that: A plurality of small holes are formed on the disc surface of the high-speed cutting flow guide material guiding disc, and sawtooth-shaped metal dispersion pieces with consistent inclination directions are arranged on the peripheral side of the disc surface.

6. The on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive paste according to claim 5, characterized in that: The sawtooth-shaped metal dispersion pieces on the peripheral side of the disc surface of the high-speed cutting flow guide material guiding disc are arranged in a staggered manner.

7. The on-line vacuum defoaming circulating device for lithium battery carbon-coated foil conductive slurry according to claim 6, characterized in that: The high-speed cutting flow guide material guiding disc is provided with double layers.

8. The on-line vacuum defoaming circulation device for lithium battery carbon-coated foil conductive paste according to claim 1, characterized in that: The centrifugal vacuum sealed hopper adopts magnetic fluid vacuum sealing, and the hopper feeding port and the hopper discharging port also adopt magnetic fluid vacuum sealing.

9. The on-line vacuum defoaming circulation device for lithium battery carbon-coated foil conductive paste according to claim 1, characterized in that: The centrifugal vacuum sealed hopper is designed to be conical with an angle of 30-45°, and is made of 304 stainless steel.

10. The on-line vacuum defoaming circulation device for lithium battery carbon-coated foil conductive paste according to claim 1, characterized in that: A PLC control system is further included and is arranged outside the centrifugal vacuum sealed hopper.

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