CN108101060B - Device for preparing high-energy-density lithium ion battery nano silicon by plasma atomization - Google Patents
Device for preparing high-energy-density lithium ion battery nano silicon by plasma atomization Download PDFInfo
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- CN108101060B CN108101060B CN201810063031.XA CN201810063031A CN108101060B CN 108101060 B CN108101060 B CN 108101060B CN 201810063031 A CN201810063031 A CN 201810063031A CN 108101060 B CN108101060 B CN 108101060B
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- Prior art keywords
- plasma
- atomization
- tank body
- atomization tank
- powder
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- 238000000889 atomisation Methods 0.000 title claims abstract description 63
- 239000005543 nano-size silicon particle Substances 0.000 title claims abstract description 27
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000009423 ventilation Methods 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 235000013312 flour Nutrition 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000011863 silicon-based powder Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011856 silicon-based particle Substances 0.000 description 2
- 208000006673 asthma Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
Abstract
The device for preparing the high-energy density lithium ion battery nano silicon by plasma atomization comprises an atomization tank body, a vacuum system, a ventilation system, a plasma generating device, a powder feeding device, an air feeding device and a cooling device; the vacuum system and the ventilation system are respectively communicated with the atomization tank; the powder feeding device and the air feeding device are respectively communicated with the upper end of the atomization tank body through a powder feeding pipe and an air feeding pipe, and the air feeding pipe is sleeved outside the powder feeding pipe; the plasma generating device comprises a plasma generator and a mounting seat, wherein the plasma generator is arranged in the mounting seat in a penetrating way and can move back and forth along the mounting seat, and plasma sprayed by the plasma generator is converged at the center of the lower end of the powder feeding pipe outlet to form a plasma convergence focus area; the side wall and the bottom of the atomization tank body are respectively provided with a cooling device and a powder outlet pipe. The device simple structure, convenient operation and the silica flour that use cost is lower are as the raw materials, and the dead angle in the device atomizing area is few simultaneously, have the characteristics that atomization efficiency is high, nano silicon particle degree of consistency is good.
Description
Technical Field
The invention relates to atomization powder making equipment, in particular to a device for preparing high-energy density lithium ion battery nano silicon by plasma atomization under vacuum melting and atomization powder making equipment formed by the device.
Background
Silicon is the most widely used semiconductor material so far, and has a good industrial foundation in the fields of integrated circuits, solar photovoltaics, high-performance batteries and the like. As the application range of lithium ion batteries expands to the fields of thin film batteries, power batteries and the like, higher requirements are put on the energy density and the service life of the batteries, and the requirements on nano silicon particles serving as cathode materials are also increasing.
CN203333311U discloses a plasma device for preparing nanometer silica powder, which is characterized by comprising a hollow cavity, wherein the upper end of the cavity is provided with a feeding port for feeding silica powder and an air curtain for introducing protective atmosphere: the inner part of the cavity is divided into an upper part, a middle part and a lower part, the upper part is a combustion chamber, the middle part is a grafting reaction cavity, and the lower part is a precipitation cavity: the inside of the combustion chamber is provided with a quartz tube, a discharge coil surrounds the outside of the quartz tube, and a plasma arc high-temperature area is arranged in the quartz tube: the upper end of the quartz tube is connected with a feed inlet and an air curtain air inlet asthma: the lower end of the plasma arc high temperature area is arranged in the grafting reaction cavity, and the inner wall of the grafting reaction cavity is provided with an air inlet pipeline for introducing clean gas and grafting reaction gas from the outside. A certain powder making blind area exists in a plasma arc high-temperature area of the device, and part of silicon powder raw materials can not be contacted with plasma, so that fineness and uniformity of nano silicon products are affected.
Disclosure of Invention
The invention aims to solve the technical problems that: the device for preparing the nano silicon of the high-energy-density lithium ion battery by plasma atomization is simple in structure, convenient to operate and low in use cost, and meanwhile, the device has few atomization dead angles in an atomization area, so that the device has the characteristics of high atomization efficiency and good uniformity of nano silicon particles.
The technical scheme adopted for solving the technical problems is as follows: the device for preparing the high-energy density lithium ion battery nano silicon by plasma atomization comprises: the device comprises an atomization tank body, a vacuum system, a ventilation system, a plasma generating device, a powder feeding device, an air feeding device and a cooling device; the vacuum system and the ventilation system are respectively communicated with the atomization tank; the powder feeding device and the air feeding device are respectively communicated with the upper end of the atomization tank body through a powder feeding pipe and an air feeding pipe, and the air feeding pipe is sleeved outside the powder feeding pipe; the plasma generating device comprises a plasma generator and an installation seat, wherein the installation seat is arranged above the atomization tank body in a mode of uniformly distributing around the circumference, the plasma generator is arranged in the installation seat in a penetrating manner and can move back and forth along the installation seat, and plasma sprayed by the plasma generator is converged at the center of the lower end of the powder feeding pipe outlet to form a plasma convergence focus area; the cooling device is arranged on the side wall of the atomization tank body; the bottom of the atomization tank body is provided with a powder outlet pipe.
In the scheme, the powder feeding device is used for spraying the silicon powder raw material to a plasma collecting focal area, the silicon powder raw material is instantaneously melted in the area and is dispersed and atomized into ultrafine liquid drops by high-speed impact of the plasma, the liquid drops are dispersed under the action of air flow and gravity blown by the air feeding device, and meanwhile, the dispersed liquid drops are cooled into nano silicon particles by cooling gas blown by the air exchanging device; finally, the nano silicon particles fall on the wall surface of the atomizing tank body and are cooled by a cooling device in the side wall of the atomizing tank body for the second time, and finally are discharged by a powder outlet pipe.
Further, the number of the plasma generating devices is 2-6 groups. The plasma generator is used for spraying the plasma to the center to form a plasma collecting focal zone, and the opposite spraying mode can eliminate the atomization dead angle in the zone to the greatest extent, so that the fineness and uniformity of powder preparation are ensured.
Further, the plasma generator is connected with the mounting seat through the screw rod type adjusting device, and a sealing piece attached to the plasma generator is arranged on the inner wall of the mounting seat. The front and back positions of the plasma generator on the mounting seat can be adjusted through the screw rod type adjusting device, so that the working rule of the plasma generator is changed in a matched mode, the size of a plasma collecting focal zone can be adjusted, the atomization effect is guaranteed, and the atomization efficiency is controlled.
Further, atomizing jar side wall is provided with vibrating unloader, vibrating powder unloader includes vibrating plate, elastic connection spare, vibration generating device and controlling means: the vibrating plate is arranged on the inner wall below the vacuum atomizing tower through an elastic connecting piece and is connected with the vibration generating device: the control device is electrically connected with the vibration generator through a wire or a wireless. The vibration board can drive the atomizing jar body lateral wall and vibrate under vibration generator's drive to can guarantee that nanometer silicon particle can not pile up on atomizing jar body lateral wall.
Further, a filter screen is arranged on the powder outlet pipe. The filter screen with proper aperture is arranged, so that the nano silicon particles with unqualified size can be filtered, and the nano silicon particles enter the subsequent process.
Further, the cooling device is a disc-shaped water pipe embedded in the side wall of the atomization tank body, the upper side and the lower side of the atomization tank body are respectively provided with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet and the disc-shaped water pipe form water circulation.
The device for preparing the high-energy density lithium ion battery nano silicon by plasma atomization has the beneficial effects that: the device simple structure, convenient operation and the silica flour that use cost is lower are as processing raw materials, and simultaneously, the device atomizes the dead angle in the region few to have characteristics that atomization efficiency is high, nanometer silicon particle degree of consistency is good.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for preparing nano-silicon for a high energy density lithium ion battery by plasma atomization according to the present invention;
FIG. 2 is a schematic structural diagram of an apparatus for preparing nano-silicon for a high energy density lithium ion battery by plasma atomization according to the present invention;
fig. 3-is a schematic structural view of the plasma generating apparatus of fig. 1.
In the figure: 1-an atomization tank body, 2-a vacuum system, 3-an air supply pipe, 4-a powder supply pipe, 5-a plasma generator, 6-a mounting seat, 7-a ventilation system, 8-a powder supply pipe, 9-a vibration generating device, 10-an elastic connecting piece, 11-a vibrating plate, 12-a disc-shaped water pipe, 51-a screw rod type adjusting device, 52-a sealing piece and 81-a filter screen.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Referring to fig. 1 to 3: the device for preparing the high-energy density lithium ion battery nano silicon by plasma atomization comprises: the device comprises an atomization tank body 1, a vacuum system 2, a ventilation system 7, a plasma generating device, a powder feeding device, an air feeding device and a cooling device; the vacuum system 2 and the ventilation system 7 are respectively communicated with the atomization tank body 1; the powder feeding device and the air feeding device are respectively communicated with the upper end of the atomization tank body 1 through a powder feeding pipe 4 and an air feeding pipe 3, and the air feeding pipe 3 is sleeved outside the powder feeding pipe 4; the plasma generating device comprises a plasma generator 5 and an installation seat 6, wherein the installation seat 6 is arranged above the atomization tank body 1 in a mode of uniformly distributing around the circumference, the plasma generator 5 is arranged in the installation seat 6 in a penetrating manner and can move back and forth along the installation seat 6, and plasma sprayed by the plasma generator 5 is converged at the center of the lower end of an outlet of the powder feeding pipe 4 to form a plasma convergence focus area; the cooling device is arranged on the side wall of the atomization tank body 1; the bottom of the atomization tank body 1 is provided with a powder outlet pipe 8.
In the scheme, the powder feeding device is used for spraying the silicon powder raw material to a plasma collecting focal area, the silicon powder raw material is instantaneously melted in the area and is dispersed and atomized into ultrafine liquid drops by high-speed impact of the plasma, the liquid drops are dispersed under the action of air flow and gravity blown by the air feeding device, and meanwhile, the dispersed liquid drops are cooled into nano silicon particles by cooling gas blown by the air exchanging device; finally, the nano silicon particles fall on the wall surface of the atomization tank body 1, are cooled by a cooling device in the side wall of the atomization tank body 1 for the second time, and are finally discharged by a powder outlet pipe 8.
The number of the plasma generating devices is 2-6 groups. The plasma generators 5 are used for spraying to the center to form a plasma collecting focal zone, and the opposite spraying mode can eliminate the atomization dead angle in the zone to the greatest extent, so that the fineness and uniformity of powder preparation are ensured.
The plasma generator 5 is connected with the mounting seat 6 through the screw rod type adjusting device 51, and a sealing piece 52 attached to the plasma generator 5 is arranged on the inner wall of the mounting seat 6. The front and rear positions of the plasma generator 5 on the mounting seat 6 can be adjusted through the screw rod type adjusting device 51, so that the size of a plasma collecting focal zone can be adjusted by matching with the change of the working rule of the plasma generator 5, and the atomization effect is ensured and the atomization efficiency is controlled.
The side wall of the atomization tank body 1 is provided with a vibration type blanking device, and the vibration type powder blanking device comprises a vibration plate 11, an elastic connecting piece 10, a vibration generating device 9 and a control device: the vibration plate 11 is arranged on the inner wall below the vacuum atomization tower through an elastic connecting piece 10 and is connected with the vibration generating device 9: the control device is electrically connected with the vibration generator through a wire or a wireless. The vibration plate 11 can drive the side wall of the atomization tank body 1 to vibrate under the driving of the vibration generating device 9, so that nano silicon particles can be prevented from being accumulated on the side wall of the atomization tank body 1.
The powder outlet pipe 8 is provided with a filter screen 81. The filter screen 81 with appropriate aperture is provided, so that nano silicon particles with unqualified size can be filtered, and the nano silicon particles can be reversely fed into the subsequent process.
The cooling device is a disc-shaped water pipe 12 embedded in the side wall of the atomization tank body 1, the upper side and the lower side of the atomization tank body 1 are respectively provided with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet and the disc-shaped water pipe 12 form water circulation.
Claims (4)
1. The device for preparing the high-energy-density lithium ion battery nano silicon by plasma atomization is characterized by comprising an atomization tank body, a vacuum system, a ventilation system, a plasma generating device, a powder feeding device, an air feeding device and a cooling device; the vacuum system and the ventilation system are respectively communicated with the atomization tank; the powder feeding device and the air feeding device are respectively communicated with the upper end of the atomization tank body through a powder feeding pipe and an air feeding pipe, and the air feeding pipe is sleeved outside the powder feeding pipe; the plasma generating device comprises a plasma generator and an installation seat, wherein the installation seat is arranged above the atomization tank body in a mode of uniformly distributing around the circumference, the plasma generator is arranged in the installation seat in a penetrating manner and can move back and forth along the installation seat, and plasma sprayed by the plasma generator is converged at the center of the lower end of the powder feeding pipe outlet to form a plasma convergence focus area; the cooling device is arranged on the side wall of the atomization tank body; a powder outlet pipe is arranged at the bottom of the atomization tank body; the number of the plasma generating devices is 2-6 groups; the plasma generator is connected with the mounting seat through the screw rod type adjusting device, and a sealing piece attached to the plasma generator is arranged on the inner wall of the mounting seat.
2. The device for preparing nano silicon for high-energy-density lithium ion batteries by plasma atomization according to claim 1, wherein the side wall of the atomization tank body is provided with a vibration type blanking device, and the vibration type powder blanking device comprises a vibration plate, an elastic connecting piece, a vibration generating device and a control device: the vibrating plate is arranged on the inner wall below the vacuum atomizing tower through an elastic connecting piece and is connected with the vibration generating device: the control device is electrically connected with the vibration generator through a wire or a wireless.
3. The apparatus for preparing nano silicon for high energy density lithium ion battery by plasma atomization as set forth in claim 1, wherein a filter screen is arranged on the powder outlet tube.
4. The device for preparing the nano silicon of the high-energy-density lithium ion battery by plasma atomization according to claim 1, wherein the cooling device is a disc-shaped water pipe embedded in the side wall of the atomization tank body, the upper side and the lower side of the atomization tank body are respectively provided with a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet and the disc-shaped water pipe form water circulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063031.XA CN108101060B (en) | 2018-01-23 | 2018-01-23 | Device for preparing high-energy-density lithium ion battery nano silicon by plasma atomization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810063031.XA CN108101060B (en) | 2018-01-23 | 2018-01-23 | Device for preparing high-energy-density lithium ion battery nano silicon by plasma atomization |
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| CN108101060B true CN108101060B (en) | 2023-12-15 |
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| CN112299420A (en) * | 2020-06-12 | 2021-02-02 | 将乐三晶新材料有限公司 | Process for preparing spherical metal silicon powder by using plasma flame gun |
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2018
- 2018-01-23 CN CN201810063031.XA patent/CN108101060B/en active Active
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| CN101905374A (en) * | 2009-06-05 | 2010-12-08 | 佳能株式会社 | Optical element processing method |
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