CN108598577A - a kind of lithium ion battery manufacturing method - Google Patents
a kind of lithium ion battery manufacturing method Download PDFInfo
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- CN108598577A CN108598577A CN201711402087.5A CN201711402087A CN108598577A CN 108598577 A CN108598577 A CN 108598577A CN 201711402087 A CN201711402087 A CN 201711402087A CN 108598577 A CN108598577 A CN 108598577A
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- lithium ion
- ion battery
- precast body
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- carrier
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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
- H01M10/058—Construction or manufacture
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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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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a kind of lithium ion battery manufacturing methods, belong to lithium ion battery preparing technical field.Steps are as follows for this method：(1) preparation of electrode material powder；(2) preparation of precast body；(3) preparation of pulp of lithium ion battery；(4) preparation of pole piece；(5) preparation of battery core；(6) prepared by lithium ion battery.The present invention's can be used for the easy to operate precast body feeding apparatus that lithium ion battery produces, reduction powder airborne dust and the probability of loss, is easy to mechanized operation, greatly reduces production error and production time.
Description
Technical field
The present invention relates to a kind of lithium ion battery manufacturing methods, belong to technical field of lithium-ion battery.
Background technology
In recent years, with the continuous advancement of the charge storage ability of lithium ion battery and production technology, lithium ion battery at
For electronic product, the main energy storage device of electric vehicle.At the same time, the market demand of lithium ion battery significantly rises,
At the same time, the demand to the production cost of lithium ion battery, production efficiency and consistency of performance also increasingly improves.
Automobile power battery is more demanding to the consistency of performance of lithium ion battery, to positive, negative electrode material
The demand of consistency also accordingly improves.In the production process of electrode material, no matter working condition control reaches how high level,
Inevitably there is certain consistent sex differernce between different batches.Therefore it needs uniformly to mix the material of different production batch
Operational sequence (referred to as batch mixed), to realize the consistency of material.
In the preparation process of lithium ion battery, the production for carrying out slurry is first had to.In slurry production process, mainly there is two
Kind route, one：First binder and solvent are mixed, prepare glue, then successively by electrode material, conductive agent, additive
It is added in stirred tank, glue is added and is stirred dispersion；Secondly：Directly binder, conductive agent, electrode material, additive are added
Enter in stirred tank, solvent is added and is stirred dispersion.
In the two preparation routes, electrode material, conductive agent, additive are all powdered objects.Powder it is weighed
Journey is broadly divided into manual weighing and equipment weighs two kinds of technologies.Manual weighing claims each component using electronic scale manually successively
Amount and charging, each powder are required for once being weighed, and process is cumbersome and be easy to cause employment injuries；Also automatic add can be selected
Expect equipment, production cost and place can be increased.
For example, " pulp of lithium ion battery and preparation method thereof " disclosed in CN201611200897, which uses
Refining step it is as follows, Step 1: by active material, binder and conductive agent except putting into double-shaft paddle formula high efficient mixer after iron
In, it is uniformly mixed, forms mixed powder.Step 2: solvent is added in the mixed powder, stirring is formed with being uniformly mixed
Mixed slurry.High speed dispersion is carried out Step 3: the mixed slurry is put into high speed dispersor, it is 70- to form solid content
80% semi-finished product slurry.Step 4: by de-bubble, sieving under the semi-finished product slurry vacuum, pulp of lithium ion battery is formed.It should
In the technical solution of patent application publication, need successively to feed intake each powder, material addition step is relatively cumbersome, need into
Row weighs operation.
For example, in " pulp of lithium ion battery and preparation method thereof and lithium ion battery " disclosed in CN201110095839,
The refining step of use is as follows：Step 1: preparing a concentration of 3%~7% glue using bonding agent；Step 2: by active matter
Matter and conductive agent are uniformly mixed to form powder under the low speed in three arm planetary mixers；Step 3: the powder in step 2
It is middle be added solvent total amount 1%~15%, be uniformly mixed to form wet powder under the low speed, wherein the total amount of solvent with it is described
The mass ratio of powder is 55: 4~50: 50；Step 4: be added in wet powder in step 3 glue 20%~50% and it is surplus
Remaining solvent, at high speeds uniformly mixing；Step 5: remaining glue is added, first uniform stirring 5~10 minutes under the low speed,
Then it stirs 2~5 hours at high speeds, forms pulp of lithium ion battery.In the technical solution of the patent application publication, using elder generation
With the flow for preparing slurry after glue, equipment of resin making and homogenate equipment are needed, while all powders are required for weighing step, feed intake
Step is relatively cumbersome, needs manual weighing or mechanical loading.
Therefore it provides a kind of probability that is easy to operate, reducing powder airborne dust and loss, being easy to mechanized operation, subtracting significantly
Producing error and the lithium ion battery manufacturing method of production time less just becomes the technical barrier that the technical field is badly in need of solution.
Invention content
The purpose of the present invention is to provide a kind of probability that is easy to operate, reducing powder airborne dust and loss, it is easy to mechanization
Operate, greatly reduce the lithium ion battery manufacturing method of production error and production time.
The above-mentioned purpose of the present invention reaches by the following technical programs：
A kind of lithium ion battery manufacturing method, its step are as follows：
(1) preparation of electrode material powder
In batch mixed process of electrode material production, conductive agent, binder, additive are added simultaneously for synchronization, obtain equal
Even powder；
Explanation：In the production of electrode material, last procedure is to criticize to mix up industry, it is therefore an objective to the material of different batches be made to fill
Point mixing simultaneously (can such as lead other solid powders needed for the production of the slurry of lithium ion battery during batch mixed
Electric agent, binder, additive etc.) it is synchronous be added, during batch mixed, while by all material mixings；
(2) preparation of precast body
By the uniform powder molding criticized after mixing in step (1), it is prepared into precast body；
Explanation：The step is needed stamping of powder into the consistent blocky precast body of neat appearance, weight, with facilitate lithium from
It feeds intake when son production, when such as every piece of weight 10kg, the 100kg that feeds intake then can directly feed intake 10 pieces；
(3) preparation of pulp of lithium ion battery
The precast body of step (2) is put by feeding apparatus in homogenate equipment, solvent is added, obtains lithium ion battery slurry
Material；
Explanation：Be blocky when precast body input homogenate equipment, be crushed rapidly by stirring at low speed, with solvent addition very
It is stirred into wet-milling soon, becomes uniform and stable slurry using high-speed stirred and dispersion steps；
(4) preparation of pole piece
By the slurry in step (3), be coated successively, roll-in, cut-parts process, obtain pole piece；
(5) preparation of battery core
Pole piece in step (4) is subjected to battery core assembling procedure；
(6) prepared by lithium ion battery
The battery core prepared in step (5) is subjected to Battery formation process, obtains lithium ion battery.
Preferably, the concrete structure of feeding apparatus described in the step (3) is as follows：
A kind of precast body feeding apparatus, including carrier, guide rail, conveyer belt, transport vehicle, transmission belt and rocking bar；Rocking bar is solid
Set on one end of transport vehicle, guide rail is fixedly arranged on the top of transport vehicle, and rocking bar is connected with guide rail by transmission belt, conveyer belt with lead
Rail connects, and carrier is fixed on conveyer belt.
Preferably, the carrier mouth is placed upward, wherein the direction that feeds intake has the inclined-plane of certain angle, is ensured before reaching
After section feeding point, the precast body in carrier 1 can be poured out smoothly.
Preferably, the guide rail is several, is fixedly arranged on the top of transport vehicle side by side.
Preferably, the guide rail is 4-15.
Preferably, the guide rail is 10.
Preferably, the rocking bar is hand.
Preferably, the rocking bar is self-action.
Preferably, the carrier is 4-12.
Preferably, 1 piece or polylith precast body are packed into the carrier, but the quantity in each carrier is consistent.
Preferably, the side wall of the carrier towards the side that feeds intake has oblique angle, and angle is between 25-75 degree.
Preferably, the side wall of the carrier towards the side that feeds intake has oblique angle, and angle is at 45 degree.
Preferably, the carrier is 304 stainless steels, consistent with the steel that existing homogenate equipment uses.
Preferably, described in the step (3) be added solvent the specific steps are：The molten of 5 weight %-15 weight % is added
Agent, stirring at low speed；Add the solvent of 80 weight %-90 weight %, high-speed stirred dispersion；Add 5 weight %-15 weights of residue
Measure the solvent of %, stirring at low speed.
Preferably, the mass ratio of the electrode material is between 80%-95%.
Preferably, the mass ratio of the conductive agent is between 1%-10%.
Preferably, the mass ratio of the binder is between 2%-10%.
Preferably, the mass ratio of the additive is between 1%-5%.
Preferably, the shape of the precast body is that square, cuboid, cylinder, sphere etc. are readily transported, weigh, counting
Several regular shapes.
Preferably, the positive electrode in the electrode material can be lithium iron phosphate positive material, tertiary cathode material, mangaic acid
The mixing material of one or more of lithium anode material, lithium-rich manganese-based anode material；Negative material can be silicon based anode material,
The mixing material of one or more of carbon based negative electrodes material, metal oxide negative material, lithium titanate anode material.
Preferably, the additive can be itself to terminate high disagreement oligomer, specially bismaleimide oligomer material
Expect, or the volatility weak acid that copper foil and aluminium foil can be mildly etched, such as acetic acid；Easily thermal decomposition weak acid, such as oxalic acid.
Preferably, in the prefabricated production procedure, double planetary mixer can be used in the mixing of four kinds of ingredients, helical-ribbon type mixes
Four components of the equipment pair such as conjunction machine, high-speed stirred batch mixer carry out mixing dispersion, until each component is mixed thoroughly.
Preferably, when precast body prepares slurry, double planetary mixer, ball mill, high-shear homogenizer, high-pressure homogeneous can be selected
The slurry mixing devices such as machine carry out the preparation of slurry.
Preferably, in the prefabricated production procedure, the powder of certain mass is added in moulding press, coining operation is passed through
It is set to be suppressed into the precast body of fixed shape.
Preferably, between the weight of the precast body should be 0.5-5kg, prefabricated body weight is advisable with the integral multiple of 0.5kg,
Convenient for metering.
Preferably, the Mohs' hardness of the precast body is between 1-4, integrality during can ensure to transport use
In the case of, hardness can be reduced as far as possible.
Preferably, the conductive agent is conductive black, electrically conductive graphite, acetylene black, carbon nanotube, carbonaceous mesophase spherules conduction
The mixing material of one or more of agent.
Preferably, the binder is Kynoar (PVDF), polytetrafluoroethylene (PTFE) (PTFE), butadiene-styrene rubber (SBR), carboxylic
The mixing material of one or more of methylcellulose (CMC).
Preferably, solvent described in the step (3) is N-Methyl pyrrolidone (NMP).
Advantageous effect：
Dusty raw materials during the lithium ion battery manufacturing method of the present invention produces four kinds of lithium ion batteries premix,
Compacting obtains precast body, and main advantage is：
(1) in the production of electrode material, the preferable product of consistency of performance, criticize and mixes up industry, make in order to obtain
The electrode material of different batches is sufficiently mixed, conductive agent, binder, additive can electrode material batch mix up in industry together plus
Enter, so that the raw material premix of batch mixing lithium ion battery of electrode material is synchronously completed, be not necessarily to additional procuring equipment；
(2) in the conventional manufacturing process of pulp of lithium ion battery, it usually needs glue is prepared and slurry prepares two steps,
Precast body and solvent can be directly stirred, when precast body carries out slurry preparation two steps by method using the present invention
It is combined into one, saves production equipment and production time；
(3) precast body charging process is simple, is directly fed intake with precast body, compared with dry powder weighing or automatic Metage Eguipment
More high efficiency and low cost.
Below by description of the drawings, the present invention will be further described with specific implementation mode, but is not meant to this hair
The limitation of bright protection domain.
Description of the drawings
Fig. 1 be the embodiment of the present invention 1 lithium ion battery manufacturing method in precast body feeding apparatus structural representation journey figure.
Main parts size title in attached drawing：
1 carrier, 2 guide rail
3 conveyer belt, 4 transport vehicle
5 transmission belt, 6 rocking bar
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, people in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
A kind of lithium ion battery manufacturing method, its step are as follows：
(1) preparation of electrode material powder
By positive electrode, conductive agent, binder, additive with 88：7：4：1 mass ratio carries out batch mixed operation；This implementation
The positive electrode of example is ternary material, conductive agent is conductive black, binder is Kynoar (PVDF), additive is span
Carry out acid imide oligomer, batch mixed operation is carried out to the raw material dry powder of 1 ton of gross weight by high speed mixer, obtains uniform premixing flour
End；
(2) preparation of precast body
Pre-mix powder is added in the compression molding forming machine that mold shape is cuboid, the quality that feeds every time is 2kg, and compacting obtains
500 pieces of the precast body that Mohs' hardness is 1 is obtained, the double planetary mixer that can meet 100L capacity carries out 10 lithium ion cell positives
The production of slurry；
(3) preparation of pulp of lithium ion battery
50 pieces of precast bodies are taken, are put by feeding apparatus in the double planetary mixer of 100L capacity；40kg N- methyl is added
Pyrrolidones (NMP) solvent carries out 2 hours works with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed
Industry；40kg nmp solvents are added, with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed, carry out 3 hours
Operation obtains the slurry that theoretical solid content is 55.56%；Carry out solid content adjustment, due to precast body inevitably exist it is a certain amount of
Abrasion or weight error, after carrying out solid content detection to slurry, need to be added suitable nmp solvent and carry out solid content adjustment.
For example, when solid content is 55%, the nmp solvent of 3.2kg can be added, carry out solid content adjustment, then with 15 revs/min of agitating paddle
Rotating speed, 1200 revs/min of dispersion disk rotating speed carry out operation in 0.5 hour, and the solid content of slurry is adjusted to 54%；
In whole slurry preparation process, it is 4 steps to need step, and double planetary mixer is 1, and consumption total time is 5.5 small
When；
(4) preparation of pole piece
By the slurry in step (3), be coated successively, roll-in, cut-parts process, obtain pole piece；
(5) preparation of battery core
Pole piece in step (4) is subjected to battery core assembling procedure；
(6) prepared by lithium ion battery
The battery core prepared in step (5) is subjected to Battery formation process, obtains lithium ion battery 1.
As shown in Figure 1, for be the embodiment of the present invention lithium ion battery manufacturing method in precast body feeding apparatus structure
Illustrate journey figure, wherein 1 is carrier, and 2 be guide rail, and 3 be conveyer belt, and 4 be transport vehicle, and 5 be transmission belt, and 6 be rocking bar；The present invention
In precast body feeding apparatus, including carrier 1, guide rail 2, conveyer belt 3, transport vehicle 4, transmission belt 5, rocking bar 6；Rocking bar 6 is fixed
In one end of transport vehicle 4, guide rail 2 is 10 total, is fixedly arranged on the top of transport vehicle 4, rocking bar 6 and an immediate guide rail side by side
2 are connected by transmission belt 5, and conveyer belt 3 is connect with guide rail 2, and carrier 1 is 12 total, is fixedly arranged on conveyer belt 3, conveyer belt 3
Frictional force when being rotated by guide rail 2 drives, and power is derived from rocking bar 6, and when rotating rocker 6, transmission belt 5 drives first guide rail
2 rotations, remaining guide rail are driven；Carrier 1 is 304 stainless steels, consistent with the steel that existing homogenate equipment uses, carrier 1
Mouth is placed upward, and the side wall of wherein carrier 1 towards the side that feeds intake has oblique angle, and angle is 25 degree, ensures to reach leading portion feeding point
Afterwards, the precast body in carrier 1 can be poured out smoothly, and after precast body is poured out, empty carrier 1 continues to move ahead with conveyer belt 3,
And be recycled to transmission side in the lower end of transmission belt 5, in addition precast body, starts another cycle.
It feeds intake before beginning, precast body is fitted into the carrier 1 on conveyer belt 3, by feeding apparatus (including transport vehicle
Precast body feeding apparatus) be pushed near pulp of lithium ion battery production equipment, will can be used for lithium ion battery production it is prefabricated
The opposite end alignment homogenate cavity of body feeding apparatus rocking bar 6, shakes rocking bar 6, the precast body of the precast body input present invention is fed intake
In equipment, precast body is fitted into the carrier 1 for the precast body feeding apparatus that can be used for lithium ion battery production, each carrier
It can be packed into a certain number of precast bodies in 1, can be 1 piece or polylith, but the quantity in each carrier 1 is consistent, for example, every piece
Precast body is 2kg, and each carrier 1 can be packed into 5 pieces, when a collection of slurry of often production needs 20kg raw materials, can be filled precast body
Full 2 carriers are all added in homogenate cavity, can also fill multiple carriers, feed intake to multiple devices, will carry
Precast body in disk 1 pours into the slurry producing equipment of lithium ion battery.Further, since feeding apparatus is by slurry producing equipment
A certain distance has been separated with producers, be conducive to the safety of personnel and has reduced the risk for artificially bringing pollutant into, this implementation
Rocking bar 6 is manual in example.
Embodiment 2
A kind of lithium ion battery manufacturing method, its step are as follows：
(1) preparation of electrode material powder
By positive electrode, conductive agent, binder, additive with 80：10：5：5 mass ratio carries out batch mixed operation；This implementation
The positive electrode of example is ternary material, conductive agent is conductive black, binder PVDF, additive are bismaleimide oligomerization
Object carries out batch mixed operation to the raw material dry powder of 1 ton of gross weight by high speed mixer, obtains uniform pre-mix powder；
(2) preparation of precast body
Pre-mix powder is added in the compression molding forming machine that mold shape is cylinder, the quality that feeds every time is 5kg, and compacting obtains
500 pieces of the precast body that Mohs' hardness is 4 is obtained, the double planetary mixer that can meet 100L capacity carries out 10 lithium ion cell positives
The production of slurry；
(3) preparation of pulp of lithium ion battery
50 pieces of precast bodies are taken, are put by feeding apparatus in the double planetary mixer of 100L capacity；It is molten that 40kgNMP is added
Agent carries out operation in 2 hours with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed；40kg NMP are added
Solvent carries out operation in 3 hours with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed, obtains theoretical solid
The slurry that content is 55.56%；Solid content adjustment is carried out, because inevitably there is a certain amount of abrasion or weight error in precast body,
After carrying out solid content detection to slurry, need that suitable nmp solvent progress solid content adjustment is added.For example, solid content is 55%
When, be added the nmp solvent of 3.2kg, carry out solid content adjustment, then with 15 revs/min of rotating speed of agitator, 1200 revs/min
Disperse the operation that disk rotating speed carries out 0.5 hour, the solid content of slurry is adjusted to 54%；
In whole slurry preparation process, it is 4 steps to need step, and double planetary mixer is 1, and consumption total time is 5.5 small
When；
(4) preparation of pole piece
By the slurry in step (3), be coated successively, roll-in, cut-parts process, obtain pole piece；
(5) preparation of battery core
Pole piece in step (4) is subjected to battery core assembling procedure；
(6) prepared by lithium ion battery
The battery core prepared in step (5) is subjected to Battery formation process, obtains lithium ion battery 2.
Precast body feeding apparatus in the present invention, including carrier, guide rail, conveyer belt, transport vehicle, transmission belt, rocking bar；It shakes
Bar is fixedly arranged on one end of transport vehicle, and guide rail is 4 total, is fixedly arranged on the top of transport vehicle side by side, rocking bar is led with immediate one
Rail is connected by transmission belt, and conveyer belt is connect with guide rail, and carrier is 4 total, is fixedly arranged on conveyer belt, conveyer belt is by leading
Frictional force when rail rotates drives, and power is derived from rocking bar, and when rotating rocker, transmission belt drives first guide rail rotation, remaining
Guide rail is driven；Carrier is 304 stainless steels, and consistent with the steel that existing homogenate equipment uses, carrier mouth is placed upward,
The side wall of middle carrier towards the side that feeds intake has oblique angle, and angle is 25 degree, is ensured after reaching leading portion feeding point, pre- in carrier
Body processed can be poured out smoothly, and after precast body is poured out, empty carrier continues to move ahead with conveyer belt, and is followed in the lower end of transmission belt
Ring is sent to transmission side, in addition precast body, starts another cycle.
It feeds intake before beginning, precast body is fitted into the carrier on conveyer belt, by feeding apparatus (including transport vehicle
Precast body feeding apparatus) it is pushed near pulp of lithium ion battery production equipment, the precast body of lithium ion battery production will be can be used for
The opposite end alignment homogenate cavity of feeding apparatus rocking bar, shakes rocking bar, by the precast body feeding apparatus of the precast body input present invention
In, precast body is fitted into the carrier of precast body feeding apparatus, a certain number of precast bodies can be packed into each carrier, it can
Think 1 piece or polylith, but the quantity in each carrier is consistent, for example, every piece of precast body is 2kg, each carrier can fill
Enter 5 pieces, when a collection of slurry of often production needs 20kg raw materials, precast body can be filled to 2 carriers, be all added to homogenate cavity
In, multiple carriers can be also filled, are fed intake to multiple devices, the precast body in carrier is poured into lithium ion battery
In slurry producing equipment.Further, since slurry producing equipment and producers have been separated a certain distance by feeding apparatus, favorably
The risk of pollutant is artificially brought into the safety of personnel and reduction, and rocking bar is automatic (motor drive) in the present embodiment.
Embodiment 3
A kind of lithium ion battery manufacturing method, its step are as follows：
(1) preparation of electrode material powder
By positive electrode, conductive agent, binder, additive with 95：1：2：2 mass ratio carries out batch mixed operation；This implementation
The positive electrode of example is ternary material, conductive agent is conductive black, binder PVDF, additive are bismaleimide oligomerization
Object carries out batch mixed operation to the raw material dry powder of 1 ton of gross weight by high speed mixer, obtains uniform pre-mix powder；
(2) preparation of precast body
Pre-mix powder is added in the compression molding forming machine that mold shape is sphere, the quality that feeds every time is 2kg, and compacting obtains
500 pieces of the precast body that Mohs' hardness is 1, the double planetary mixer that can meet 100L capacity carry out 10 lithium ion cell positive slurries
The production of material；
(3) preparation of pulp of lithium ion battery
50 pieces of precast bodies are taken, are put by feeding apparatus in the double planetary mixer of 100L capacity；It is molten that 40kgNMP is added
Agent carries out operation in 2 hours with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed；40kg NMP are added
Solvent carries out operation in 3 hours with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed, obtains theoretical solid
The slurry that content is 55.56%；Carry out solid content adjustment：Because inevitably there is a certain amount of abrasion or weight error in precast body,
After carrying out solid content detection to slurry, need that suitable nmp solvent progress solid content adjustment is added, for example, solid content is 55%
When, the NMP of 3.2kg is added, carries out solid content adjustment, then with 15 revs/min of rotating speed of agitator, 1200 revs/min of dispersion
Disk rotating speed carries out operation in 0.5 hour, and the solid content of slurry is adjusted to 54%；
In whole slurry preparation process, it is 4 steps to need step, and double planetary mixer is 1, and consumption total time is 5.5 small
When；
(4) preparation of pole piece
By the slurry in step (3), be coated successively, roll-in, cut-parts process, obtain pole piece；
(5) preparation of battery core
Pole piece in step (4) is subjected to battery core assembling procedure；
(6) prepared by lithium ion battery
The battery core prepared in step (5) is subjected to Battery formation process, obtains lithium ion battery 3.
Precast body feeding apparatus in the present invention, including carrier, guide rail, conveyer belt, transport vehicle, transmission belt, rocking bar；It shakes
Bar is fixedly arranged on one end of transport vehicle, and guide rail is 10 total, is fixedly arranged on the top of transport vehicle side by side, rocking bar is led with immediate one
Rail is connected by transmission belt, and conveyer belt is connect with guide rail, and carrier is 12 total, is fixedly arranged on conveyer belt, conveyer belt passes through
Frictional force when guide rail rotates drives, and power is derived from rocking bar, and when rotating rocker, transmission belt drives first guide rail rotation,
Remaining guide rail is driven；Carrier is 304 stainless steels, and consistent with the steel that existing homogenate equipment uses, carrier mouth is placed upward,
The side wall of wherein carrier towards the side that feeds intake has oblique angle, and angle is 45 degree, is ensured after reaching leading portion feeding point, in carrier
Precast body can be poured out smoothly, and after precast body is poured out, empty carrier continues to move ahead with conveyer belt, and in the lower end of transmission belt
It is recycled to transmission side, in addition precast body, starts another cycle.
It feeds intake before beginning, precast body is fitted into the carrier on conveyer belt, by feeding apparatus (including transport vehicle
Can be used for the precast body feeding apparatus of lithium ion battery production) it is pushed near pulp of lithium ion battery production equipment, by precast body
The opposite end alignment homogenate cavity of feeding apparatus rocking bar, shakes rocking bar, by the precast body feeding apparatus of the precast body input present invention
In, precast body is fitted into the carrier for the precast body feeding apparatus that can be used for lithium ion battery production, it can in each carrier
A certain number of precast bodies are packed into, can be 1 piece or polylith, but the quantity in each carrier is consistent, for example, every piece of precast body
For 2kg, each carrier can be packed into 50 pieces, and when a collection of slurry of often production needs 200kg raw materials, precast body can be filled to 2
Carrier is all added in homogenate cavity, can also fill multiple carriers, feed intake to multiple devices, will be in carrier
Precast body pour into the slurry producing equipment of lithium ion battery.Further, since feeding apparatus is by slurry producing equipment and life
Production personnel have separated a certain distance, are conducive to the safety of personnel and reduce the risk for artificially bringing pollutant into, in the present embodiment
Rocking bar 6 is manual.
Comparative example
(1) weigh binder 4kg, be dissolved in 76kg NMP, with 15 revs/min of speed of agitator, 1500 revs/min
Disperse the operation that rotating speed carries out 5 hours, prepares 5% glue 80kg；
(2) (or machine automatization blanking) ternary material 88kg, conductive black 7kg, bismaleimide oligomerization are manually weighed
Object 1kg is added separately in the double planetary mixer of 100L capacity；
(3) 0.5 hour dry-blending operations is carried out with 15 revs/min of speed of agitator；
(4) 40kg glues are added to carry out 1 hour with 25 revs/min of speed of agitator, 2500 revs/min of dispersion disk rotating speed
Operation；
(5) 40kg glues are added, 40kg glues is added with 25 revs/min of speed of agitator, 2500 revs/min of dispersion impeller
Rotating speed carries out operation in 2 hours；
(6) solid content adjustment is carried out, method is same as Example 1.The NMP of 9.2kg can be added；Again with 15 revs/min
Rotating speed of agitator, 1200 revs/min of dispersion disk rotating speed carry out operation in 0.5 hour, and the solid content of slurry is adjusted to 54%.
It is 6 steps that step is needed in whole slurry preparation process, and double planetary mixer is 2, and consumption total time is 9 hours.
Example 1 is compared with comparative example slurry, and all between 5000 ± 500cps, Hegman fineness grind is viscosity
Between 28-30 microns, it is all 54% that stirred tank levels, which sample solid content, and slurry density is all 1.75g/cm3.Carry out squash type
After coating, the scanning electron microscope (SEM) photograph pattern for obtaining pole piece is similar, and the battery capacity distribution for assembling acquisition is identical, after recycling 500 times, holds
The decaying of amount is all about 10%.It can be seen that the lithium prepared with conventional method using performance of lithium ion battery prepared by precast body
Ion battery similar performance, the next-generation raw material that can be produced as lithium ion battery.
The basic ideas of the method for the present invention are, after the completion of electrode material production, need by criticizing mixed technique by different batches
Material uniformly mixed, to ensure the consistency of material property, during batch mixed, by binder, additive, conductive agent
It is added together into batch mixed machine, obtains the equally distributed pre-mix powder of each dusty material, pre-mix powder is in dry powder moulding press
It can be prepared into the consistent precast body of neat appearance, weight, fed convenient for product storage and transportation and production.
Precast body blocking can be added in the pulping equipment of lithium ion battery production, and pass through meter during addition
Several modes prepares slurry to control charging quality, then by being dispersed with stirring.
Beneficial effects of the present invention：
By above technical scheme it is found that lithium ion battery manufacturing method of the present invention, main advantage are：
Compared with it will all components be carried out with primary weighing operation per tank slurry before this, precast body and feeding apparatus participate in
Production process in, weigh number greatly reduce；
For example, anode sizing agent production usually requires electrode material, two kinds of conductive agents and binder, producing needs in slurry process
It repeatedly to weigh, every 10 batch slurry needs to complete 40 weighing operations, then only needs high-volume to put into powder using precast body mixed
It is once weighed when closing equipment, powder mixing device can usually complete 1-5 tons of material every time, can generally meet 10-50
The slurry of batch produces；
Precast body prepared by molding not only reduces powder airborne dust and the probability of loss, meanwhile, precast body feeds intake and again
Gauge amount is easier to mechanized operation, can greatly reduce production error and production time.
It implements during lithium ion produces, it is only necessary to, can simple computation acquisition by being counted to precast body
The practical charged material weight of slurry.
The basic ideas of the method for the present invention are, after the completion of electrode material production, need by criticizing mixed technique by different batches
Material uniformly mixed, to ensure the consistency of material property, during batch mixed, by binder, additive, conductive agent
It is added together into batch mixed machine, obtains the equally distributed pre-mix powder of each dusty material, pre-mix powder is in dry powder moulding press
It can be prepared into the consistent precast body of neat appearance, weight, fed convenient for product storage and transportation and production.
Precast body blocking can be added in the pulping equipment of lithium ion battery production, and pass through meter during addition
Several modes prepares slurry to control charging quality, then by being dispersed with stirring.
Specifically, the present invention is with the maximum difference of traditional slurry preparation process：
(1) glue need not be prepared separately into binder, save the blender needed for production line for manufacturing battery and production time；Just
Under the normal condition of production, the blender more than 20% can be saved, is more than 30% slurry production time；
(2) the charging process simplification of slurry is to be directly added into precast body, original each component without carry out weighing respectively with
Charging saves and weighs artificial or weighing equipment and feed time；In the case of normal production, the weighing more than 50% can be saved
Personnel, 70% weighing equipment and 70% feed time.
(3) it no longer needs each raw material dry powder to be stirred step in slurry dispersion process, part size dispersion can be saved
Time and electric energy.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of lithium ion battery manufacturing method, its step are as follows：
(1) preparation of electrode material powder
It is synchronous that conductive agent, binder, additive are added in electrode material simultaneously in batch mixed process of electrode material production,
Obtain uniform powder；
(2) preparation of precast body
By the uniform powder molding criticized after mixing in step (1), it is prepared into precast body；
(3) preparation of pulp of lithium ion battery
The precast body of step (2) is put by feeding apparatus in homogenate equipment, solvent is added, obtains pulp of lithium ion battery；
(4) preparation of pole piece
By the slurry in step (3), be coated successively, roll-in, cut-parts process, obtain pole piece；
(5) preparation of battery core
Pole piece in step (4) is subjected to battery core assembling procedure；
(6) prepared by lithium ion battery
The battery core prepared in step (5) is subjected to Battery formation process, obtains lithium ion battery.
2. lithium ion battery manufacturing method according to claim 1, it is characterised in that：It feeds intake described in the step (3)
The concrete structure of equipment is as follows：Including carrier, guide rail, conveyer belt, transport vehicle, transmission belt and rocking bar；Rocking bar is fixedly arranged on transport
One end of vehicle, guide rail are fixedly arranged on the top of transport vehicle, and rocking bar is connected with guide rail by transmission belt, and conveyer belt is connect with guide rail,
Carrier is fixed on conveyer belt.
3. lithium ion battery manufacturing method according to claim 2, it is characterised in that：The carrier is towards the side that feeds intake
Side wall has oblique angle, and angle is between 25-75 degree；The guide rail is several, is fixedly arranged on the top of transport vehicle side by side, described to lead
Rail is 4-15, and the rocking bar is hand or self-action, and the carrier is 4-12.
4. lithium ion battery manufacturing method according to claim 1, it is characterised in that：It is conductive agent in the step (1), viscous
The mixing for tying agent, additive and electrode material uses double planetary mixer, ribbon mixer or high-speed stirred batch mixing machine equipment
Mixing dispersion is carried out to four components, until each component is mixed thoroughly；Equipment is homogenized described in the step (3) is
Double planetary mixer, ball mill, high-shear homogenizer or high pressure homogenizer.
5. lithium ion battery manufacturing method according to claim 1, it is characterised in that：Electrode described in the step (1)
The mass ratio of material between 80%-95%, the mass ratio of conductive agent described in the step (1) 1%-10% it
Between, the mass ratio of binder described in the step (1) is between 2%-10%, additive described in the step (1)
Mass ratio is between 1%-5%.
6. lithium ion battery manufacturing method according to claim 1, it is characterised in that：It is prefabricated described in the step (2)
The shape of body is square, cuboid, cylinder or sphere.
7. lithium ion battery manufacturing method according to claim 1, it is characterised in that：Electrode described in the step (1)
Positive electrode in material is lithium iron phosphate positive material, tertiary cathode material, manganate cathode material for lithium, lithium-rich manganese-based anode material
The mixing of one or more of material；Negative material is silicon based anode material, carbon based negative electrodes material, metal oxide cathode material
The mixing of one or more of material, lithium titanate anode material；Additive described in the step (1) is that bismaleimide is few
Polymers, acetic acid or oxalic acid；Conductive agent described in the step (1) be conductive black, electrically conductive graphite, acetylene black, carbon nanotube, in
Between one or more of phase carbosphere conductive agent mixing；Binder described in the step (1) is Kynoar, poly- four
The mixing of one or more of vinyl fluoride, butadiene-styrene rubber, carboxymethyl cellulose.
8. lithium ion battery manufacturing method according to claim 1, it is characterised in that：It is added described in the step (3)
Solvent the specific steps are：The solvent of 5 weight %-15 weight %, stirring at low speed is added；Add 80 weight %-90 weight %
Solvent, high-speed stirred dispersion；Add the solvent of 5 weight %-15 weight % of residue, stirring at low speed.
9. lithium ion battery manufacturing method according to claim 1, it is characterised in that：Solvent described in the step (3)
For N-Methyl pyrrolidone.
10. lithium ion battery manufacturing method according to claim 1, it is characterised in that：Precast body in the step (2)
Single quality is between 0.5-50kg.
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| CN109860513A (en) * | 2019-02-28 | 2019-06-07 | 中车青岛四方车辆研究所有限公司 | Electrodes of lithium-ion batteries and preparation method thereof and lithium ion battery |
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|---|---|---|---|---|
| EP0736918A1 (en) * | 1995-04-04 | 1996-10-09 | Dai Nippon Printing Co., Ltd. | Electrode for secondary battery with nonaqueous electrolyte and process for producing the same |
| CN103682254A (en) * | 2012-09-13 | 2014-03-26 | 大日本网屏制造株式会社 | Method for manufacturing electrode for battery |
| CN104638229A (en) * | 2015-01-30 | 2015-05-20 | 上海航天电源技术有限责任公司 | Dry-blending hard-melting preparation method for electrode slurry of automobile power lithium ion battery |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0736918A1 (en) * | 1995-04-04 | 1996-10-09 | Dai Nippon Printing Co., Ltd. | Electrode for secondary battery with nonaqueous electrolyte and process for producing the same |
| CN103682254A (en) * | 2012-09-13 | 2014-03-26 | 大日本网屏制造株式会社 | Method for manufacturing electrode for battery |
| CN104638229A (en) * | 2015-01-30 | 2015-05-20 | 上海航天电源技术有限责任公司 | Dry-blending hard-melting preparation method for electrode slurry of automobile power lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109860513A (en) * | 2019-02-28 | 2019-06-07 | 中车青岛四方车辆研究所有限公司 | Electrodes of lithium-ion batteries and preparation method thereof and lithium ion battery |
| CN109860513B (en) * | 2019-02-28 | 2020-07-28 | 中车青岛四方车辆研究所有限公司 | Lithium ion battery pole piece, preparation method thereof and lithium ion battery |
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