CN220398213U - Vacuum sintering furnace for lithium ion battery anode material - Google Patents
Vacuum sintering furnace for lithium ion battery anode material Download PDFInfo
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- CN220398213U CN220398213U CN202322029798.XU CN202322029798U CN220398213U CN 220398213 U CN220398213 U CN 220398213U CN 202322029798 U CN202322029798 U CN 202322029798U CN 220398213 U CN220398213 U CN 220398213U
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- Prior art keywords
- furnace
- lithium ion
- liner
- pipeline
- ion battery
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- 238000005245 sintering Methods 0.000 title claims abstract description 30
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 239000010405 anode material Substances 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 54
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000010406 cathode material Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 229910001448 ferrous ion Inorganic materials 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 208000028659 discharge Diseases 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Furnace Details (AREA)
Abstract
The application discloses a vacuum sintering furnace for a lithium ion battery anode material, wherein the vacuum sintering furnace is a vertical furnace, and a furnace body is cylindrical; when in use, the furnace cover is arranged on the top of the furnace body and is provided with a vacuum pipeline, an inert atmosphere pipeline, a detection pipeline and a hanging ring, and a furnace cover heat-insulating plate is arranged on the furnace cover; the top of the furnace liner is provided with a material inlet, and the bottom of the furnace liner is provided with a discharging device; the furnace chamber is arranged in the furnace shell, and a heat preservation material layer is arranged between the furnace shell and the furnace chamber and used for heat preservation during sintering; the heating body consists of a heating pipe and is wound on the outer wall of the furnace pipe and used for heating the furnace pipe; an inert atmosphere pipeline inlet is arranged at the bottom of the furnace liner. The utility model aims to provide a vacuum sintering furnace for a lithium ion battery anode material, which can overcome the defects of large inert gas amount, high energy consumption, easy oxidation of ferrous ions, large loss of coated carbon content, poor batch stability, environmental pollution and the like, and can ensure the safety of operators, and has simpler equipment structure and higher sintering efficiency.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery equipment, and particularly relates to a vacuum sintering furnace for a lithium ion battery anode material.
Background
At present, the lithium iron phosphate positive electrode material in the lithium ion battery positive electrode material becomes a new generation of the most promising safe and environment-friendly lithium ion power battery positive electrode material due to the advantages of high specific capacity, low price, no environmental pollution, good safety, good thermal stability and the like, can be widely applied to the fields of new energy automobiles, energy storage equipment, uninterruptible power supplies, electric tools and the like, and has very broad market prospect.
Most of the large-scale production of the lithium iron phosphate anode materials at home and abroad adopts inert atmosphere protection furnaces (such as mesh belt furnaces, pushing plate furnaces, rotary kilns and other equipment), and a large amount of protection gases such as nitrogen, argon and the like are required to be introduced all the time in the whole material production process; the material is not synthesized in a fully sealed state, the oxygen content in the furnace is not easy to control, and ferrous ions and coated carbon are easy to oxidize; the material synthesis time is long, the temperature is high, and the energy consumption is high; the waste gases such as ammonia, carbon monoxide, carbon dioxide and the like generated in the material synthesis process can not realize centralized emission, and can cause environmental pollution to a certain extent. How to prevent the oxidation of ferrous iron and ensure the consistency of products in the synthesis process of the lithium iron phosphate material is the key point of industrialization.
The inventor participates in developing a vacuum sintering furnace special for lithium ion battery cathode materials, patent number is CN201820159838.9, the problems are effectively solved, but the sintering furnace can generate larger workload during discharging, the material taking process is particularly troublesome, the materials in the material box are required to be lifted out together with the support frame manually, then, a new material box and the material box support frame are replaced, so that the workload is increased, more devices are required, and in the material lifting process, the risk of scalding operators is likely to be caused due to the fact that the temperature of the materials is too high. Therefore, after careful study, the inventor decides to open a vacuum sintering furnace for the anode material of the lithium ion battery, which has the advantages of comprehensive functions, simple equipment structure, convenient operation and higher efficiency, so as to meet the requirements.
Disclosure of Invention
The utility model aims to provide a vacuum sintering furnace for a lithium ion battery anode material, which can overcome the defects of large inert gas amount, high energy consumption, easy oxidation of ferrous ions, large loss of coated carbon content, poor batch stability, environmental pollution and the like, and can ensure the safety of operators, and has simpler equipment structure and higher sintering efficiency.
The vacuum sintering furnace is a vertical furnace, and the furnace body is cylindrical; when in use, the furnace cover is arranged on the top of the furnace body and is provided with a vacuum pipeline, an inert atmosphere pipeline, a detection pipeline and a hanging ring, and a furnace cover heat-insulating plate is arranged on the furnace cover; the top of the furnace liner is provided with a material inlet, and the bottom of the furnace liner is provided with a discharging device; the furnace chamber is arranged in the furnace shell, and a heat preservation material layer is arranged between the furnace shell and the furnace chamber and used for heat preservation during sintering; the heating body consists of a heating pipe and is wound on the outer wall of the furnace pipe and used for heating the furnace pipe; an inert atmosphere pipeline inlet is arranged at the bottom of the furnace liner.
The furnace pipe is made of stainless steel, and the top of the furnace pipe is provided with a flanging for placing a sealing ring.
The heating pipe of the heating body is an electric heating pipe.
The furnace is internally provided with a material bearing plate which is a spiral vane type material plate.
The furnace is internally provided with a plurality of pipelines, one end of each pipeline is used for receiving a material inlet, the other end of each pipeline directly abuts against the bottom of the furnace, and the pipelines form a pipeline type storage bin. In the sintering furnace in the prior art, materials are stacked from a material inlet into the furnace for sintering, and the technical scheme is that the furnace is divided into a plurality of material channels by pipelines from a whole, the material channels form a new storage bin, the arrangement of the pipelines enables a material cavity to be changed into a plurality of units from a whole, the materials fall into each pipeline from the material inlet, and the materials are uniformly dispersed.
The discharging device is of a horn mouth structure, a drawer type valve is arranged between the bottom of the furnace pipe and the bottom of the furnace pipe, the drawer type valve is connected with the bottom of the furnace pipe to be sealed, and when discharging is needed, discharging can be carried out by pulling the drawer type valve open.
The sealing ring is an integral high-temperature-resistant sealing rubber ring, and integral sealing is formed between the furnace cover and the furnace liner to prevent leakage.
When the vacuum sintering furnace is used, firstly, the prepared materials are introduced into the furnace liner from the material inlet, the material inlet is closed, then, the furnace is pumped to high vacuum by a vacuum pump through a vacuumizing pipeline on a furnace cover, then, the furnace is closed, then, inert gases such as nitrogen, argon and the like are injected into micro vacuum through an inert gas pipe orifice, and the process is repeatedly circulated until the oxygen content in the furnace is less than 10 multiplied by 10 < -6 > (10 ppm); then closing the inert gas pipeline and continuously vacuumizing; and then heating by a heating body between the furnace shell and the furnace liner in a program control manner, exhausting waste gas generated in the furnace in a heating process through a vacuum pipeline, intensively carrying out pollution discharge treatment, after the temperature rises to a specified temperature and roasting at a constant temperature for several hours, closing a heating program, naturally cooling the vacuum furnace, finally closing a vacuumizing pipeline, opening an inert gas pipeline, injecting inert gas, opening a drawer type valve to discharge materials after the furnace reaches normal pressure, and repeating the operation steps to carry out the next round of material sintering.
The utility model has the following advantages and effects:
1. according to the utility model, the circulating feeding is carried out through the material inlet at the top of the furnace shell, so that the operation of taking out the material and the bracket is simpler and more reliable than the existing one;
2. the use amount of protective gases such as nitrogen, argon and the like can be greatly reduced, and the production cost is reduced;
3. the design of pipeline formula feed bin structure not only can be fine dispersion material for the material heating is more even, and the unloading of material is convenient moreover, does not remain.
4. The material is synthesized in a fully sealed vacuum state, so that the oxidation of ferrous ions and the loss of the content of coated carbon can be avoided.
Drawings
FIG. 1 is a front cross-sectional view of the present utility model;
FIG. 2 is a schematic view of the internal piping silo structure of the present utility model;
FIG. 3 is a schematic view of the overall structure of the present utility model;
in the figure, the furnace comprises a 1-furnace shell, a 2-furnace liner, a 3-heat preservation material layer, a 4-heating body, a 5-blanking device, a 6-furnace cover, a 7-furnace cover heat preservation material layer, an 8-material inlet, a 9-vacuum pipeline, a 10-oxygen content detection pipeline, a 11-drawer type valve, a 12-inert atmosphere pipeline, a 13-hanging ring and a 14-pipeline type storage bin.
Detailed Description
The utility model is further described below with reference to the accompanying drawings, without limiting the utility model in any way, and any alterations or substitutions based on the teachings of the utility model are intended to fall within the scope of the utility model.
Example 1
A vacuum sintering furnace for the anode material of the lithium ion battery as shown in figure 1, which also comprises a furnace shell 1, a furnace cover 6, a furnace liner 2, a heat preservation material layer 3 and a heating body 4, wherein the vacuum sintering furnace is a vertical furnace, and the furnace body is cylindrical; when in use, the furnace cover 6 is arranged on the top of the furnace body and is provided with a vacuum pipeline 9, an oxygen content detection pipeline 10 and a hanging ring 13, and a furnace cover heat-insulating material layer is arranged on the furnace cover; the furnace liner 2 is arranged in the furnace shell 1, the furnace liner 2 is made of stainless steel, and the top of the furnace liner is provided with a flanging; a heat preservation material layer 3 is arranged between the furnace shell 1 and the furnace liner 2; the method is used for heat preservation during sintering; the heating body 4 consists of a heating pipe, which is an electric heating pipe and is arranged between the furnace pipe 2 and the heat preservation material layer 3; the top of the furnace liner 2 is provided with a material inlet 8, and the bottom is provided with a blanking device 5; an inert atmosphere pipeline inlet is arranged at the bottom of the furnace liner.
Example 2
As shown in fig. 2, unlike in embodiment 1, in order to disperse the material, the material is heated uniformly, the space in the furnace is divided into a plurality of material channels by the pipes, and a plurality of pipes form a pipe-type storage bin 14, so that the material is fed conveniently and heated uniformly and rapidly.
While the present utility model has been described in detail with reference to the drawings, the scope of the utility model is not limited to the above embodiments, and various changes can be made without departing from the spirit of the utility model within the knowledge of those skilled in the art.
Claims (7)
1. A vacuum sintering furnace for anode materials of lithium ion batteries comprises a furnace shell, a furnace liner and a furnace cover, wherein the furnace body is cylindrical; a furnace cover heat-insulating material layer is arranged between the furnace cover and the furnace body, and a vacuum pipeline, an oxygen content detection pipeline and a hanging ring are arranged on the furnace top; the furnace chamber is arranged in the furnace shell, and a heat preservation material layer is arranged between the furnace shell and the furnace chamber and used for heat preservation during sintering; the heating body is arranged on the outer wall of the furnace chamber and consists of a heating pipe, and is wound on the outer wall of the furnace chamber and used for heating the furnace chamber; an inert atmosphere pipeline inlet is arranged at the bottom of the furnace liner.
2. The vacuum sintering furnace for lithium ion battery anode materials according to claim 1, wherein the furnace liner is made of stainless steel, and a flanging is arranged at the top of the furnace liner for placing a sealing ring.
3. The lithium ion battery cathode material vacuum sintering furnace according to claim 1, wherein the heating pipe of the heating body is an electric heating pipe.
4. The vacuum sintering furnace for the anode material of the lithium ion battery according to claim 1, wherein a plurality of pipelines are arranged in the furnace, one end of each pipeline is used for receiving a material inlet, the other end of each pipeline is directly abutted against the bottom of the furnace, and the pipelines form a pipeline type storage bin.
5. The vacuum sintering furnace for the anode material of the lithium ion battery according to claim 1, wherein the blanking device is of a horn mouth structure, a drawer type valve is arranged between the bottom of the furnace liner and the blanking device, and the drawer type valve is connected with the bottom of the furnace liner in a sealing way.
6. The vacuum sintering furnace for lithium ion battery cathode materials according to claim 2, wherein the sealing ring is an integral high-temperature-resistant sealing rubber ring, and an integral seal is formed between the furnace cover and the furnace liner to prevent leakage.
7. The vacuum sintering furnace for the anode material of the lithium ion battery according to claim 1, wherein a material bearing plate is arranged in the furnace liner, and the material bearing plate is a spiral blade type material plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223219836 | 2022-12-02 | ||
| CN202223219836X | 2022-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220398213U true CN220398213U (en) | 2024-01-26 |
Family
ID=89612961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322029798.XU Active CN220398213U (en) | 2022-12-02 | 2023-07-31 | Vacuum sintering furnace for lithium ion battery anode material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220398213U (en) |
-
2023
- 2023-07-31 CN CN202322029798.XU patent/CN220398213U/en active Active
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