CN109004193A - A kind of negative electrode of lithium ion battery carbonizing plant and its carbonization method - Google Patents
A kind of negative electrode of lithium ion battery carbonizing plant and its carbonization method Download PDFInfo
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- CN109004193A CN109004193A CN201810787640.XA CN201810787640A CN109004193A CN 109004193 A CN109004193 A CN 109004193A CN 201810787640 A CN201810787640 A CN 201810787640A CN 109004193 A CN109004193 A CN 109004193A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of negative electrode of lithium ion battery carbonizing plant, including liquid reserve tank, the liquid reserve tank upper end is fixedly installed with condenser, carbonization case and the drier being connected to the liquid reserve tank inside；Exhaust pipe is installed on the drier；The processor that the liquid reserve tank side is equipped with display screen and is electrically connected with the display screen；Carbonization case upper end removable seal is connected with case lid；The condenser is connected to inside the carbonization case and the liquid reserve tank respectively by air inlet pipe and an air outlet pipe；Infusion pump is installed in bottom in the liquid reserve tank, the inlet tube being connected to inside the carbonization case is installed on the infusion pump.Beneficial effect is: a kind of negative electrode of lithium ion battery carbonizing plant and its carbonization method of the present invention can be recycled amorphous carbon precursor solution, not only save covering material, reduce material consumption cost, and the effect that is carbonized is good.
Description
Technical field
The present invention relates to field of lithium, and in particular to a kind of negative electrode of lithium ion battery carbonizing plant and its carbonization method.
Background technique
The graphite materials such as graphite powder and graphite film are used in lithium battery extensively due to its unique electricity and heat performance
Make negative electrode material, although graphite is used in lithium ion battery with operating voltage is high, specific energy is big, light-weight, small in size, circulation
Service life is long, can be quickly charged and discharged and the advantages that non-environmental-pollution, but the compatibility of graphite and electrolyte is poor, limits pure stone
Application of the ink in lithium ion battery.Therefore graphite material must be modified, in one layer of amorphous carbon of Graphite Coating
Material increases battery charging and discharging capacity to improve its tap density.
Currently, traditional method for coating is usually to pour into graphite cathode material in amorphous carbon precursor solution, then
It stirs on one side, one side heated solution makes its evaporation, so that amorphous carbon presoma be allowed to be coated on graphite material surface, later will
Graphite cathode material, which is put into carbide furnace, to be carbonized to amorphous carbon presoma and can form one on graphite cathode material surface
Layer amorphous carbon covering material.
Above-mentioned method for coating has that amorphous carbon precursor solution wasting phenomenon is more serious in use,
Amorphous carbon precursor solution is immediately discharged in outdoor air after evaporating, and is not aligned and is recycled, therefore coats material
Expect higher cost, and graphite cathode material be put into carbide furnace be carbonized and is also required to that the time is spent to carry out carrying conveying,
It is time-consuming and laborious, influence the production cycle for coating production technology；
Although disclosing a kind of cathode material of lithium ion battery graphite packet application No. is 201420833545.6 Chinese patent
Cover carbonizing plant (including carbonization case, case lid, regulation motor and electromagnetic induction coil, carbonization case are made of insulating layer and heat-conducting layer,
Resistive heater is equipped between insulating layer and heat-conducting layer, regulation motor is fixed on the case lid on carbonization case top, regulates and controls on motor
Agitating paddle and stirring rod are installed in the shaft of connection, stirring rod ends are connected with side wall scraper, and shaft end is equipped with bottom
Scraper, electromagnetic induction coil are wrapped on carbonization box outer wall, and the feed pipe with check valve and going out with strainer are connected on case lid
Tracheae, escape pipe are connected with delivery pipe by blower, are equipped with infrared radiation thermometer and thermocouple in carbonization case) it can be realized and be carbonized
Coated in case and be carbonized operation, eliminates the fiber crops for being put into graphite cathode material and carrying conveying when being carbonized in carbide furnace
Tired, still, there are still before amorphous carbon in use for above-mentioned cathode material of lithium ion battery graphite coat carbonizing plant
It drives liquid solution to be immediately discharged in outdoor air after evaporating, is not aligned and is recycled, wasting phenomenon is than more serious, cladding
Material cost expends higher problem, in addition, when being carbonized to amorphous carbon presoma not in the environment of completely cutting off air
It carries out, therefore amorphous carbon presoma carbonization effect is poor, it is not very practical.
Summary of the invention
The object of the invention is that provide to solve the above-mentioned problems a kind of negative electrode of lithium ion battery carbonizing plant and
Its carbonization method, to solve to need to expend a large amount of nothing when negative electrode of lithium ion battery carbonizing plant traditional in the prior art works
The problems such as shape carbon precursor solution, and covering material Expenses Cost is higher, and the effect that is carbonized is poor.It is provided by the invention many
Preferred technical solution, which can be realized, in technical solution is recycled amorphous carbon precursor solution, saves cladding material
Material, so can reduce material consumption cost, and meanwhile the technical effects such as the effect that is carbonized is good, elaboration as detailed below.
To achieve the above object, the present invention provides following technical schemes:
A kind of negative electrode of lithium ion battery carbonizing plant provided by the invention, including liquid reserve tank, the liquid reserve tank upper end are fixedly mounted
There are condenser, carbonization case and the drier being connected to the liquid reserve tank inside；Exhaust pipe is installed on the drier；It is described
The processor that liquid reserve tank side is equipped with display screen and is electrically connected with the display screen；The carbonization case upper end removable seal connects
It is connected to case lid；The condenser is connected to inside the carbonization case and the liquid reserve tank respectively by air inlet pipe and an air outlet pipe；Institute
It states and infusion pump is installed in bottom in liquid reserve tank, the inlet tube being connected to inside the carbonization case is installed on the infusion pump；
The case lid upper surface is fixedly installed with stirring motor, elevating hopper and rotating electric machine, and the case lid lower surface rolls installation
Have agitating shaft that upper end and the output shaft of the stirring motor are fixedly connected and be close to the case lid lower surface roll and with institute
The sealing plate that rotating electric machine lower end output shaft is fixedly connected is stated, is provided with the blanking being connected to the elevating hopper on the sealing plate
Hole, the agitating shaft side are covered with agitating paddle, and the carbonization chamber interior wall lower end is fixedly installed with to be rolled with the agitating shaft lower end
The sieve plate of connection is disposed with the temperature sensor being electrically connected with the processor on the carbonization chamber interior wall；In the carbonization case
It is covered with through-hole on the bottom surface of side, the carbonization bottom face is internally provided with the plenum chamber being connected to the through-hole；In the liquid reserve tank
Side top surface is provided with the outlet tube being connected to the plenum chamber；
Nitrogen cylinder is installed on the carbonization box outer wall, passes through appendix and air-supply respectively with the nitrogen cylinder and the plenum chamber
The air flow dryer of pipe connection；Control valve is mounted on the appendix and the air supply tube and the outlet tube.
Preferably, being hinged with maintenance door on the liquid storage box outer wall.
Preferably, the air inlet pipe upper end is protruded into the carbonization case from the case lid upper surface.
Preferably, the escape pipe lower end extend into the liquid reserve tank inside bottom.
Preferably, the inlet tube is connected to the carbonization chamber interior wall upper end.
Preferably, the outlet tube lower end is equipped with solution strainer.
Preferably, the blanking hole number has multiple, and the distribution that is centrosymmetric centered on the rotating electric machine.
A kind of negative electrode of lithium ion battery carbonization method, it is negative using lithium ion battery described in claim 1-7 any one
Pole carbonizing plant executes following steps:
Step 1: amorphous carbon precursor solution and graphite cathode material to be carbonized are separately added into liquid reserve tank and elevating hopper
It is interior, then start infusion pump and rotating electric machine, make amorphous carbon precursor solution and graphite cathode material respectively by into
Liquid pipe and blanking hole enter in carbonization case；
Step 2: starting stirring motor, to the amorphous carbon precursor solution and graphite cathode material entered in the carbonization case
It is mixed, is finished when graphite cathode material is fed, while amorphous carbon precursor solution also just floods graphite cathode
When material, the infusion pump is closed, stops continuing to convey amorphous carbon precursor solution into the carbonization case, while starting institute
Stating rotating electric machine drives sealing plate rotation to seal up the elevating hopper lower end；
Step 3: continuing after stirring a period of time, open the control valve on outlet tube, before the amorphous carbon in the carbonization case
It drives liquid solution to be all put into the liquid reserve tank, is then shut off the control valve；
Step 4: opening the control valve on appendix and air supply tube, opens air flow dryer, the nitrogen in nitrogen cylinder is through institute
Appendix is stated into being heated in the air flow dryer, the nitrogen of the heat after heating enters in plenum chamber through the air supply tube
And heating graphite cathode material is flowed upwards out from through-hole, the amorphous carbon precursor solution on graphite cathode material surface is by warm
The heating of nitrogen and evaporate, so that forming amorphous carbon presoma is coated on graphite cathode material surface, later, with the heat of heat
Nitrogen continuous heating, the amorphous carbon presoma for being coated on graphite cathode material surface be carbonized to be formed amorphous carbon cladding material
Material；The nitrogen of heat flows through after a large amount of graphite cathode materials above sieve plate in the carbonization case from bottom to top from air inlet pipe
It is cooled down in into condenser；Into the gas in the condenser in addition to the nitrogen of heat, there are also the amorphous of evaporation
Carbon precursor solution vapor, after above-mentioned mixed gas cools in the condenser, hot nitrogen temperature is reduced, amorphous
Carbon precursor solution vapor is liquefied as amorphous carbon precursor solution；Nitrogen and amorphous carbon precursor solution enter through escape pipe
In the liquid reserve tank, later, nitrogen is discharged after drier is dry from exhaust pipe.
Preferably, described during nitrogen hot in step 4 heats graphite cathode material in the carbonization case stir
Motor is mixed not stop operating.
Beneficial effect is: a kind of negative electrode of lithium ion battery carbonizing plant and its carbonization method of the present invention can be right
Amorphous carbon precursor solution is recycled, and not only saves covering material, reduces material consumption cost, and the effect that is carbonized
It is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is main view of the invention；
Fig. 2 is the internal structure chart of Fig. 1 of the invention；
Fig. 3 is the partial enlarged view of Fig. 2 of the invention；
Fig. 4 is the structural schematic diagram of sealing plate of the invention.
The reference numerals are as follows:
1, liquid reserve tank；2, maintenance door；3, condenser；4, escape pipe；5, air inlet pipe；6, be carbonized case；7, infusion pump；8, inlet tube；
9, drier；10, exhaust pipe；11, case lid；12, stirring motor；13, elevating hopper；14, rotating electric machine；15, sealing plate；16, under
Expect hole；17, agitating shaft；18, agitating paddle；19, temperature sensor；20, display screen；21, processor；22, nitrogen cylinder；23, hot wind
Dryer；24, control valve；25, appendix；26, air supply tube；27, outlet tube；28, solution strainer；29, plenum chamber；30, lead to
Hole；31, sieve plate.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Shown in referring to figures 1-4, a kind of negative electrode of lithium ion battery carbonizing plant provided by the invention, including liquid reserve tank 1, storage
Liquid case 1 for storing amorphous carbon precursor solution, 1 upper end of liquid reserve tank be fixedly installed with condenser 3, carbonization case 6 and with storage
The drier 9 being connected to inside liquid case 1, damp and hot nitrogen and amorphous carbon presoma of the condenser 3 for cooling carbonization case 6 discharge are molten
Liquid steam, in this way can avoid directly by amorphous carbon precursor solution steam drain into outdoor cause amorphous carbon presoma waste,
And amorphous carbon precursor solution steam can flow back into secondary use in liquid reserve tank 1 again after liquefying in condenser 3, effectively
Amorphous carbon precursor solution is saved, the Expenses Cost of amorphous carbon precursor solution is reduced, drier 9 is used for nitrogen is dry
It is discharged afterwards from exhaust pipe 10；Exhaust pipe 10 is installed on drier 9；1 side of liquid reserve tank is equipped with display screen 20 and and display screen
The processors 21 of 20 electrical connections, temperature signal that processor 21 is detected for temperature sensor 19 simultaneously will treated temperature
Degree evidence is shown on display screen 20 checks for staff, and staff is facilitated to adjust the heating power of air flow dryer 23；
Carbonization 6 upper end removable seal of case is connected with case lid 11；Condenser 3 by air inlet pipe 5 and escape pipe 4 respectively with carbonization case 6 and
It is connected to inside liquid reserve tank 1；Infusion pump 7 is installed, infusion pump 7 is used for the amorphous carbon in liquid reserve tank 1 in liquid reserve tank 1 in bottom
Precursor solution is delivered to carbonization case 6, and the inlet tube 8 being connected to inside carbonization case 6 is equipped on infusion pump 7；
11 upper surface of case lid is fixedly installed with stirring motor 12, elevating hopper 13 and rotating electric machine 14, and rotating electric machine 14 is for driving
The rotation control elevating hopper 13 of sealing plate 15 discharges, and the rolling of 11 lower surface of case lid is equipped with upper end and the output shaft of stirring motor 12 is solid
Surely the agitating shaft 17 and abutting 11 lower surface of case lid connected is rolled and is fixedly connected with 14 lower end output shaft of rotating electric machine close
Sealing plate 15, sealing plate 15 are used for seal feeding bucket 13, prevent the nitrogen of heat from escaping from elevating hopper 13, be provided on sealing plate 15 with
The blanking hole 16 that elevating hopper 13 is connected to, 17 side of agitating shaft are covered with agitating paddle 18, and carbonization 6 inner wall lower end of case is fixedly installed with and stirs
The sieve plate 31 that 17 lower end of axis rolls connection is mixed, the bottom that sieve plate 31 is used to that graphite cathode material to be stopped to fall on carbonization case 6 prevents
Graphite cathode material, which enters, blocks plenum chamber 29 in through-hole 30, be disposed with the temperature being electrically connected with processor 21 on 6 inner wall of case that is carbonized
Spend sensor 19；It is covered with through-hole 30 in carbonization 6 inside bottom surface of case, carbonization 6 bottom surface of case is internally provided with the sky being connected to through-hole 30
Chamber 29；1 inside top surface of liquid reserve tank is provided with the outlet tube 27 being connected to plenum chamber 29；
Nitrogen cylinder 22 is installed on carbonization 6 outer wall of case, passes through appendix 25 and air supply tube respectively with nitrogen cylinder 22 and plenum chamber 29
23 air flow dryer 23 of air flow dryer of 26 connections is used to for the nitrogen heating in nitrogen cylinder 22 being sent into carbonizing chamber to graphite
Negative electrode material, which carries out heating, makes the amorphous carbon presoma carbonization for being coated on graphite cathode material surface, since nitrogen is largely filled with
It is carbonized in case 6, completely cuts off amorphous carbon presoma and outside air, therefore it is preferable to guarantee that amorphous carbon presoma has
Be carbonized effect；Control valve 24 is mounted on appendix 25 and air supply tube 26 and outlet tube 27, control valve 24 is defeated for controlling
Tracheae 25 and air supply tube 26 and 27 on-off of outlet tube.
As optional embodiment, maintenance door 2 is hinged on 1 outer wall of liquid reserve tank, personnel convenient to overhaul are to storage for maintenance door 2
Water pump and solution strainer 28 in liquid case 1 are overhauled；
5 upper end of air inlet pipe is protruded into carbonization case 6 from 11 upper surface of case lid, is designed in this way, can avoid the amorphous carbon in carbonization case 6
Precursor solution flows into air inlet pipe 5.
4 lower end of escape pipe extend into 1 inside bottom of liquid reserve tank, designs in this way, so that not having liquefaction to finish in condenser 3
Amorphous carbon precursor solution steam can be dissolved in the amorphous carbon precursor solution in liquid reserve tank 1 without direct with nitrogen
Drain that (4 lower end of escape pipe, which extend into 1 inside bottom of liquid reserve tank, ensure that nitrogen and amorphous carbon precursor solution from exhaust pipe 10
Steam can be passed into amorphous carbon precursor solution after leaving from condenser 3), effectively avoid amorphous carbon presoma unrestrained
Take.
Inlet tube 8 is connected to carbonization 6 inner wall upper end of case.
27 lower end of outlet tube is equipped with solution strainer 28, and solution strainer 28 is used to filter the nothing flowed into liquid reserve tank 1
Shape carbon precursor solution.
16 quantity of blanking hole has multiple, and the distribution that is centrosymmetric centered on rotating electric machine 14, multiple blanking holes 16 make
Sealing plate 15 slightly rotates and can open 13 blanking of elevating hopper, so that elevating hopper 13 is opened and closed response very fast.
A kind of negative electrode of lithium ion battery carbonization method uses the negative electrode of lithium ion battery carbon of claim 1-7 any one
Execution following steps are set in makeup:
Step 1: amorphous carbon precursor solution and graphite cathode material to be carbonized are separately added into liquid reserve tank 1 and elevating hopper
In 13, then starts infusion pump 7 and rotating electric machine 14, lead to amorphous carbon precursor solution and graphite cathode material respectively
It crosses inlet tube 8 and blanking hole 16 enters in carbonization case 6；
Step 2: starting stirring motor 12, to enter carbonization case 6 in amorphous carbon precursor solution and graphite cathode material into
Row is mixed, and finishes when graphite cathode material is fed, while amorphous carbon precursor solution also just floods graphite cathode material
When material, infusion pump 7 is closed, stops continuing to convey amorphous carbon precursor solution into carbonization case 6, while starting rotating electric machine 14
The rotation of sealing plate 15 is driven to seal up 13 lower end of elevating hopper；
Step 3: continuing after stirring a period of time, open the control valve 24 on outlet tube 27, by the amorphous carbon in case 6 that is carbonized
Precursor solution is all put into liquid reserve tank 1, is then shut off control valve 24；
Step 4: opening the control valve 24 on appendix 25 and air supply tube 26, opens air flow dryer 23, the nitrogen in nitrogen cylinder 22
Gas enters in air flow dryer 23 through appendix 25 to be heated, and the nitrogen of the heat after heating enters plenum chamber 29 through air supply tube 26
It is interior and flow upwards out heating graphite cathode material from through-hole 30, the amorphous carbon precursor solution on graphite cathode material surface by
Heat nitrogen heating and evaporate, so that forming amorphous carbon presoma is coated on graphite cathode material surface, later, with heat
Heat nitrogen continuous heating, the amorphous carbon presoma for being coated on graphite cathode material surface is carbonized to form amorphous carbon packet
Cover material；The nitrogen of heat flowed through from bottom to top in carbonization case 6 after a large amount of graphite cathode materials above sieve plate 31 from into
Tracheae 5, which enters in condenser 3, to cool down；Into the gas in condenser 3 in addition to the nitrogen of heat, there are also the nothing of evaporation is fixed
Shape carbon precursor solution vapor, after above-mentioned mixed gas cools in condenser 3, hot nitrogen temperature is reduced, amorphous
Carbon precursor solution vapor is liquefied as amorphous carbon precursor solution；Nitrogen and amorphous carbon precursor solution through escape pipe 4 into
Enter in liquid reserve tank 1, later, nitrogen is discharged after drier 9 is dry from exhaust pipe 10.
As optional embodiment, hot nitrogen heats the process of graphite cathode material in carbonization case 6 in step 4
Middle stirring motor 12 does not stop operating, and designs in this way, before guaranteeing that graphite cathode material surface can uniformly apply and spread amorphous carbon
Drive liquid solution.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of negative electrode of lithium ion battery carbonizing plant, including liquid reserve tank (1), it is characterised in that: liquid reserve tank (1) upper end is solid
Dingan County is equipped with condenser (3), carbonization case (6) and the drier (9) being connected to the liquid reserve tank (1) inside；The drier
(9) exhaust pipe (10) are installed on；Liquid reserve tank (1) side is equipped with display screen (20) and is electrically connected with the display screen (20)
The processor (21) connect；Carbonization case (6) upper end removable seal is connected with case lid (11)；The condenser (3) by into
Tracheae (5) and escape pipe (4) are connected to inside the carbonization case (6) and the liquid reserve tank (1) respectively；In the liquid reserve tank (1)
It is equipped in bottom infusion pump (7), the inlet tube being connected to inside carbonization case (6) is installed on the infusion pump (7)
(8)；
Case lid (11) upper surface is fixedly installed with stirring motor (12), elevating hopper (13) and rotating electric machine (14), the case
Lid (11) lower surface roll be equipped with agitating shaft (17) that upper end is fixedly connected with the output shaft of the stirring motor (12) and
It is close to the sealing plate (15) that the case lid (11) lower surface rolls and is fixedly connected with the rotating electric machine (14) lower end output shaft,
The blanking hole (16) being connected to the elevating hopper (13) is provided on the sealing plate (15), agitating shaft (17) side is covered with
Agitating paddle (18), described carbonization case (6) inner wall lower end are fixedly installed with the sieve plate that connection is rolled with the agitating shaft (17) lower end
(31), the temperature sensor (19) being electrically connected with the processor (21) is disposed on described carbonization case (6) inner wall；The carbonization
It is covered with through-hole (30) in case (6) inside bottom surface, described carbonization case (6) bottom surface is internally provided with the sky being connected to the through-hole (30)
Chamber (29)；Top surface is provided with the outlet tube (27) being connected to the plenum chamber (29) on the inside of the liquid reserve tank (1)；
Nitrogen cylinder (22) and the nitrogen cylinder (22) and the plenum chamber (29) are installed respectively on carbonization case (6) outer wall
The air flow dryer (23) being connected to by appendix (25) with air supply tube (26)；The appendix (25) and the air supply tube (26)
And control valve (24) are mounted on the outlet tube (27).
2. a kind of negative electrode of lithium ion battery carbonizing plant according to claim 1, it is characterised in that: the liquid reserve tank (1)
Maintenance door (2) are hinged on outer wall.
3. a kind of negative electrode of lithium ion battery carbonizing plant according to claim 1, it is characterised in that: the air inlet pipe (5)
Upper end is protruded into the carbonization case (6) from the case lid (11) upper surface.
4. a kind of negative electrode of lithium ion battery carbonizing plant according to claim 1, it is characterised in that: the escape pipe (4)
Lower end extend into the liquid reserve tank (1) inside bottom.
5. a kind of negative electrode of lithium ion battery carbonizing plant according to claim 1, it is characterised in that: the inlet tube (8)
It is connected to carbonization case (6) the inner wall upper end.
6. a kind of negative electrode of lithium ion battery carbonizing plant according to claim 1, it is characterised in that: the outlet tube (27)
Lower end is equipped with solution strainer (28).
7. a kind of negative electrode of lithium ion battery carbonizing plant according to claim 1, it is characterised in that: the blanking hole (16)
Quantity has multiple, and the distribution that is centrosymmetric centered on the rotating electric machine (14).
8. a kind of negative electrode of lithium ion battery carbonization method, which is characterized in that using lithium described in claim 1-7 any one from
Sub- battery cathode carbonizing plant executes following steps:
Step 1: amorphous carbon precursor solution and graphite cathode material to be carbonized are separately added into liquid reserve tank (1) and feeding
It struggles against in (13), then starts infusion pump (7) and rotating electric machine (14), make amorphous carbon precursor solution and graphite cathode material point
Do not entered in carbonization case (6) by inlet tube (8) and blanking hole (16) respectively；
Step 2: starting stirring motor (12), it is negative to the amorphous carbon precursor solution and graphite that enter in carbonization case (6)
Pole material is mixed, and is finished when graphite cathode material is fed, while amorphous carbon precursor solution also just floods stone
When black negative electrode material, the infusion pump (7) are closed, are stopped molten to continuing in the carbonization case (6) to convey amorphous carbon presoma
Liquid, while starting the rotating electric machine (14) and sealing plate (15) rotation is driven to seal up the elevating hopper (13) lower end；
Step 3: continuing after stirring a period of time, open the control valve (24) on outlet tube (27), will be in the carbonization case (6)
Amorphous carbon precursor solution be all put into the liquid reserve tank (1), be then shut off the control valve (24)；
Step 4: opening the control valve (24) on appendix (25) and air supply tube (26), opens air flow dryer (23), nitrogen
Nitrogen in gas cylinder (22) enters in the air flow dryer (23) through the appendix (25) to be heated, the heat after heating
Nitrogen enters in plenum chamber (29) through the air supply tube (26) and flows upwards out heating graphite cathode material, graphite from through-hole (30)
The amorphous carbon precursor solution on negative electrode material surface by heat nitrogen heating and evaporate, to form amorphous carbon forerunner
Body is coated on graphite cathode material surface, later, with the continuous heating of the nitrogen of the heat of heat, is coated on graphite cathode material table
The amorphous carbon presoma in face is carbonized to form amorphous carbon covering material；The nitrogen of heat is interior from bottom to top in the carbonization case (6)
It carries out cooling down drop from air inlet pipe (5) into condenser (3) are interior after flowing through a large amount of graphite cathode materials above sieve plate (31)
Temperature；Into the gas in the condenser (3) in addition to the nitrogen of heat, the amorphous carbon precursor solution steam also evaporated, on
It states after mixed gas cools in the condenser (3), hot nitrogen temperature reduces, amorphous carbon precursor solution steam
It is liquefied as amorphous carbon precursor solution；Nitrogen and amorphous carbon precursor solution are through escape pipe (4) the entrance liquid reserve tank (1)
In, later, nitrogen is discharged after drier (9) are dry from exhaust pipe (10).
9. a kind of negative electrode of lithium ion battery carbonization method according to claim 8, it is characterised in that: hot nitrogen in step 4
The stirring motor (12) does not stop operating gas during heating graphite cathode material in the carbonization case (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787640.XA CN109004193B (en) | 2018-07-18 | 2018-07-18 | Lithium ion battery cathode carbonization device and carbonization method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787640.XA CN109004193B (en) | 2018-07-18 | 2018-07-18 | Lithium ion battery cathode carbonization device and carbonization method thereof |
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| CN109004193A true CN109004193A (en) | 2018-12-14 |
| CN109004193B CN109004193B (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116678217A (en) * | 2023-08-03 | 2023-09-01 | 四川士达贸易有限公司 | Graphitization process and equipment for lithium battery cathode material |
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| CN116678217B (en) * | 2023-08-03 | 2023-10-13 | 四川士达贸易有限公司 | Graphitization process and equipment for lithium battery cathode material |
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| CN109004193B (en) | 2020-07-28 |
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