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CN-121972077-A - Nanometer cladding modification device

CN121972077ACN 121972077 ACN121972077 ACN 121972077ACN-121972077-A

Abstract

The invention provides a nano coating modification device, which relates to the technical field of electrochemical energy storage material preparation equipment, and comprises a reaction kettle, wherein the reaction kettle comprises a reaction cavity and a static mixer, the reaction cavity comprises a stabilizing section, a conical accelerating section and a pushing section which are sequentially communicated along the axial direction of the reaction cavity, the stabilizing section is used for providing an initial mixing space for mixing base particles and nano coating materials to form a first mixed material, the inner diameter of one end of the conical accelerating section, which faces the stabilizing section, is gradually reduced to the inner diameter of one end of the conical accelerating section, which faces the pushing section, the static mixer comprises a separation structure, the separation structure is embedded between the two axial ends of the conical accelerating section, the separation structure is provided with a plurality of separation meshes distributed in an array, and the separation structure is used for cutting the first mixed material into a second mixed material with smaller volume through the separation meshes. The invention can improve the coating consistency and the modification stability of the nano coating material on the outer layer of the matrix particles.

Inventors

  • SHAO WENDA
  • Fan Chunle
  • CHEN LUXIN
  • ZHOU WEI
  • QIAO DONG
  • ZHANG YI

Assignees

  • 中控技术股份有限公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (15)

  1. 1. The utility model provides a nanometer cladding modification device which characterized in that, includes reation kettle, reation kettle includes: The reaction cavity (101), the reaction cavity (101) comprises a stabilizing section (1011), a conical accelerating section and a pushing section (1014) which are sequentially communicated along the axial direction of the reaction cavity, the stabilizing section (1011) is used for providing an initial mixing space for mixing base particles and nano coating materials to form a first mixed material, the inner diameter of one end of the conical accelerating section towards the stabilizing section (1011) is gradually reduced to the inner diameter of one end of the conical accelerating section towards the pushing section (1014), and the pushing section (1014) is used for temporarily storing fully mixed second mixed materials; Static mixer (103), said static mixer (103) comprising a separating structure (1032), said separating structure (1032) being embedded between the axial ends of said cone-shaped acceleration section, said separating structure (1032) being provided with a plurality of separating meshes distributed in an array, said separating structure (1032) being adapted to cut said first mixed material into smaller volumes of said second mixed material through a plurality of said separating meshes.
  2. 2. The nano-coating modifying device of claim 1, wherein the separation structure (1032) comprises a plurality of grid plates arranged in a stacked manner along an axial direction of the reaction chamber (101), the grid plates being provided with a plurality of holes arranged at intervals, the plurality of holes of adjacent two grid plates being disposed crosswise and constituting the separation mesh.
  3. 3. The nano-coating modification apparatus according to claim 1, wherein the static mixer (103) further comprises a plurality of flow deflectors (1031), the plurality of flow deflectors (1031) being annularly spaced and fixedly mounted to an end face of the partition structure (1032) facing the stabilizing section (1011).
  4. 4. The nano-coating modifying device of claim 3, wherein the tapered acceleration section comprises a first tapered acceleration section (1012) and a second tapered acceleration section (1013) which are sequentially communicated in an axial direction of the reaction chamber (101), an end of the first tapered acceleration section (1012) away from the second tapered acceleration section (1013) is communicated with an end of the stabilizing section (1011), an end of the second tapered acceleration section (1013) away from the first tapered acceleration section (1012) is communicated with the pushing section (1014), and a taper angle of the second tapered acceleration section (1013) is smaller than a taper angle of the first tapered acceleration section (1012).
  5. 5. The nano-cladding modifying apparatus of claim 4, wherein the separation structure (1032) is fixed at the junction of the first cone angle acceleration section (1012) and the second cone angle acceleration section (1013).
  6. 6. The nano-coating modification apparatus according to claim 4, wherein the static mixer (103) further comprises a tapered air guide sleeve (1033), the tapered air guide sleeve (1033) is connected with an outer edge of an end surface of the partition structure (1032) far from the air guide sleeve (1031), and two axial end dimensions of the tapered air guide sleeve (1033) are respectively matched with an outer diameter of the partition structure (1032) and an inner diameter of an end portion of the second cone angle acceleration section (1013) close to the first cone angle acceleration section (1012).
  7. 7. The nano-coating modifying device according to claim 1, further comprising a gas source supply and treatment system (2), wherein the gas source supply and treatment system (2) comprises a carrier gas mixing tank (201), a gas supply pipeline (202) and a high-speed vortex generator (206), the carrier gas mixing tank (201) is provided with a first gas outlet hole and at least two first gas inlet holes, the at least two first gas inlet holes are used for respectively entering different kinds of inert gases, one end of the gas supply pipeline (202) is communicated with the first gas outlet hole of the carrier gas mixing tank (201), the other end of the gas supply pipeline (202) is communicated with the stabilizing section (1011) through the high-speed vortex generator (206) and is used for converting the mixed gas formed by mixing the different kinds of inert gases in the carrier gas mixing tank (201) into a high-speed gas flow and leading the high-speed gas flow into the stabilizing section (1011).
  8. 8. The nano-coating modification apparatus according to claim 7, wherein the gas source supply and treatment system (2) comprises a plurality of high-speed vortex generators (206), a plurality of the high-speed vortex generators (206) being radially spaced around the stabilizing section (1011).
  9. 9. The nano-coating modification apparatus according to claim 7, wherein the gas source supply and treatment system (2) further comprises a vortex flow guiding structure (207), the vortex flow guiding structure (207) having a spiral groove, the vortex flow guiding structure (207) being embedded and fixed within the high-speed vortex generator (206) for converting the high-speed gas flow into a high-speed rotating gas flow.
  10. 10. The nano-coating modification apparatus according to claim 7, wherein the gas source supply and treatment system (2) further comprises a gas pressure reducing valve (204) and a mass flow controller (203), the gas pressure reducing valve (204) and the mass flow controller (203) being respectively in communication with the gas supply line (202), the gas pressure reducing valve (204) being configured to reduce the high pressure mixed gas output from the carrier gas mixing tank (201) to a steady pressure gas, the mass flow controller (203) being configured to monitor and control the flow rate of the steady pressure gas in the gas supply line (202).
  11. 11. The nano-coating modifying device according to claim 1, further comprising a material conveying system (3), wherein the material conveying system (3) comprises a screw feeder (301), a pneumatic conveyor (302) and a conveying pipeline (303) which are sequentially communicated, the interior of the screw feeder (301) is used for containing the base particles, and the pneumatic conveyor (302) is communicated with the stabilizing section (1011) through the conveying pipeline (303).
  12. 12. The nano-coating modifying apparatus according to claim 11, further comprising an exhaust gas treatment and recovery system (7), the exhaust gas treatment and recovery system (7) comprising a recovery assembly (701) for recovering the matrix particles and the nano-coating material entrained in the unreacted exhaust gas generated in the recovery reaction stage in the stabilization section (1011) into the screw feeder (301), the recovery assembly (701) comprising a first exhaust pipe, a recovery vessel, a recovery pipe and a discharge valve, both ends of the first exhaust pipe being respectively in communication with the stabilization section (1011) and the recovery vessel, the recovery vessel being provided with a first outlet, the first outlet of the recovery vessel being in communication with the screw feeder (301) through the recovery pipe, the discharge valve being in communication between the recovery vessel and the screw feeder (301).
  13. 13. The nano-coating modifying device of claim 12, wherein the exhaust gas treatment and recovery system (7) further comprises an exhaust gas purification assembly (702), the recovery vessel further comprises a second outlet, the exhaust gas purification assembly (702) comprises a second exhaust pipe, an adsorption structure and an exhaust gas detection means, the second outlet of the recovery vessel is communicated with the adsorption structure through the second exhaust pipe, the adsorption structure is provided with a third outlet, the exhaust gas detection means is mounted at the third outlet of the adsorption structure, and the exhaust gas detection means is used for monitoring the concentration of exhaust gas in the adsorption structure.
  14. 14. The nano-coating modifying device of any one of claims 1 to 13, further comprising a central control cabinet (8), a power device and a temperature control assembly, the power device being electrically connected to the temperature control assembly for providing an operating power supply to the temperature control assembly, the temperature control assembly being in contact with the reaction chamber (101) for regulating an internal temperature of the reaction chamber (101); the temperature control assembly comprises a heating module, the heating module comprises a plurality of heating coils (5), the heating coils (5) are respectively installed on the outer peripheral walls of the stabilizing section (1011) and the conical accelerating section, the heating coils (5) are electrically connected with the output ends of the power supply devices, the input ends of the power supply devices are electrically connected with the central control cabinet (8), and the central control cabinet (8) is used for controlling the heating temperature of the heating coils (5) by adjusting the output power of the power supply devices.
  15. 15. The nano-coating modification device according to claim 14, wherein the temperature control assembly further comprises a cooling module (6), the cooling module (6) comprises a liquid cooling container (602), a liquid inlet pipe, a liquid return pipe, a water pump and a jacket (601), the jacket (601) is sleeved on the heating coil (5), and the jacket (601) is provided with a cavity structure, and a liquid inlet and a liquid return which are communicated with the cavity structure; The liquid cooling container (602) is communicated with the liquid inlet of the jacket (601) through the liquid inlet pipe, the liquid return port of the jacket (601) is communicated with the liquid cooling container (602) through the liquid return pipe, and the water pump is communicated between the liquid cooling container (602) and the liquid inlet.

Description

Nanometer cladding modification device Technical Field The invention relates to the technical field of electrochemical energy storage material preparation equipment, in particular to a nano coating modification device. Background In the field of lithium ion battery cathode materials, matrix particles such as lithium iron phosphate are widely used for their high safety, long cycle life and cost advantages. In order to further improve the conductivity and the multiplying power performance, a reaction kettle based on a nano coating modification device generally adopts a nano coating technology to coat a nano coating material on the surface of lithium iron phosphate so as to form a nano coating layer. In the related art, reation kettle includes shell, stirring vane and agitator motor, be equipped with on the shell be used for the carrier gas import that mixed gas (for example inert gas such as nitrogen gas, argon gas) got into, be used for the first feed inlet that the base member granule got into and be used for the second feed inlet that nanometer cladding material got into, stirring vane installs in the inside of shell, agitator motor sets up in the outside of shell, and is connected with the stirring vane drive for drive stirring vane high-speed rotation mixes the nanometer cladding material and the base member granule that will get into in the shell with adopting the mode of stirring. However, the flow rate of the matrix particles in the shell, which is close to the inner peripheral wall and other areas, is slow, so that a 'mixing dead zone' is formed, the matrix particles in the 'mixing dead zone' cannot be fully mixed with the nano coating material, and the thickness of the coating layer of the matrix particles is uneven, so that the coating consistency and the modification stability of the nano coating material on the outer layer of the matrix particles are affected. Disclosure of Invention The invention solves the problem of how to improve the coating consistency and the modification stability of the nano coating material on the outer layer of the matrix particles. In order to solve the above problems, the present invention provides a nano-coating modifying device, which comprises a reaction kettle, wherein the reaction kettle comprises: the reaction cavity comprises a stabilizing section, a conical accelerating section and a pushing section which are sequentially communicated along the axial direction of the reaction cavity, wherein the stabilizing section is used for providing an initial mixing space for mixing base particles and nano coating materials to form a first mixed material, the inner diameter of one end of the conical accelerating section, which faces the stabilizing section, is gradually reduced to the inner diameter of one end of the conical accelerating section, which faces the pushing section, and the pushing section is used for temporarily storing a fully mixed second mixed material; the static mixer comprises a separation structure, the separation structure is embedded between the two axial ends of the conical accelerating section, the separation structure is provided with a plurality of separation meshes distributed in an array, and the separation structure is used for cutting the first mixed material into the second mixed material with smaller volume through a plurality of separation meshes. Optionally, the separation structure comprises a plurality of grid plates which are arranged in a stacking way along the axial direction of the reaction cavity, the grid plates are provided with a plurality of holes which are arranged at intervals, and the holes of two adjacent grid plates are arranged in a crossing way and form the separation mesh. Optionally, the static mixer further comprises a plurality of guide vanes, and the guide vanes are fixedly installed on the end face, facing the stabilizing section, of the separation structure at annular intervals. Optionally, the conical accelerating section comprises a first conical angle accelerating section and a second conical angle accelerating section which are sequentially communicated along the axial direction of the reaction cavity, the end part of the first conical angle accelerating section, which is far away from the second conical angle accelerating section, is communicated with the end part of the stabilizing section, the end part of the second conical angle accelerating section, which is far away from the first conical angle accelerating section, is communicated with the pushing section, and the conical angle of the second conical angle accelerating section is smaller than that of the first conical angle accelerating section. Optionally, the separation structure is fixed at the junction of the first cone angle accelerating section and the second cone angle accelerating section. Optionally, the static mixer further comprises a conical air guide sleeve, wherein the conical air guide sleeve is connected with the outer edge of the end fa