CN107715774A - Lithium battery closes paste-making method and solid powder premixing device - Google Patents
Lithium battery closes paste-making method and solid powder premixing device Download PDFInfo
- Publication number
- CN107715774A CN107715774A CN201710547125.XA CN201710547125A CN107715774A CN 107715774 A CN107715774 A CN 107715774A CN 201710547125 A CN201710547125 A CN 201710547125A CN 107715774 A CN107715774 A CN 107715774A
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- Prior art keywords
- fluid bed
- solid powder
- powder
- lithium battery
- slurry
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
- B01F33/401—Methods
-
- 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
- H01M4/04—Processes of manufacture in general
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/59—Mixing reaction ingredients for fuel cells
-
- 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
Abstract
The present invention is applied to lithium battery processing and manufacturing technology, there is provided a kind of lithium battery closes paste-making method and solid powder premixing device.Lithium battery closes paste-making method, comprises the following steps：S1, the powder for being used for closing each solid constituent material starched is provided according to proportioning and closes slurry solvent；S2, the powder of each solid constituent material is pre-mixed, obtains hybrid solid powder；S3, by the hybrid solid powder with it is described conjunction slurry solvent be placed in conjunction slurry retort in carry out conjunction slurry.Solid powder premixing device, including fluid bed and compressed air source unit, fluid bed are provided with charging aperture, discharging opening, air inlet and gas outlet, and compressed air source unit is connected with air inlet.Lithium battery provided by the invention closes paste-making method compared with prior art, by being first pre-mixed to the powder of each solid constituent material in lithium battery slurry-stirring process, hybrid solid powder is stirred with conjunction slurry solvent again and mixed, the uniform mixing for closing solid powder in slurry process is realized, improves conjunction slurry quality.
Description
Technical field
The invention belongs to lithium battery processing and manufacturing technology, is to be related to a kind of lithium battery to close paste-making method more specifically
And solid powder premixing device.
Background technology
With the continuous development of hyundai electronicses information technology, lithium ion battery with its energy density it is high, have extended cycle life
Advantage, turn into the indispensable electrochmical power source of hyundai electronicses information products.In lithium ion battery production, slurry-stirring process, slurries
Quality is to be related to the most important link of finished product quality, and when closing slurry process, both positive and negative polarity is required for consolidating a variety of different
Body powder is uniformly mixed in liquid medium, and currently used method is directly by material (including solid and the liquid of whole
Body) added according to proportioning in retort and be stirred mixing, but in mixed process active material with other solid additives (such as
Conductive agent) it is difficult in dispersant dispersed, follow-up pole coating is uneven, the problems such as particle easily occurs, causes made electricity
Pond uniformity is poor, Cycle Difference, and serious conditions are likely to occur analysis lithium and cause safety problem.
The content of the invention
It is an object of the invention to provide a kind of lithium battery to close paste-making method and solid powder premixing device, it is intended to solves existing
In technology lithium battery manufacture close present in slurry process because mix it is uneven easily cause that follow-up pole coating is uneven, easy appearance
The technical problem of particle.
To achieve the above object, the technical solution adopted by the present invention is：A kind of lithium battery is provided and closes paste-making method, including it is as follows
Step：
S1, the powder for being used for closing each solid constituent material starched is provided according to proportioning and closes slurry solvent；
S2, the powder of each solid constituent material is pre-mixed, obtains hybrid solid powder；
S3, by the hybrid solid powder with it is described conjunction slurry solvent be placed in conjunction slurry retort in carry out conjunction slurry.
Further, in step S2, the powder of each solid constituent material is placed in progress fluidization premix in fluid bed
Close, obtain the hybrid solid powder.
Further, in step S2, the operating time of fluidization premixing is 1h~2h.
Lithium battery provided by the invention closes paste-making method compared with prior art, by first to each in lithium battery slurry-stirring process
The powder of solid constituent material is first pre-mixed, then hybrid solid powder is stirred with conjunction slurry solvent and mixed, and is realized
Solid powder uniformly mixes in lithium battery manufactures and closes slurry process, improves the deployment conditions of lithium battery slurry and closes slurry quality, drop
It is low that follow-up pole coating is uneven, easily the risk of particle occurs.
It is described it is a further object of the present invention to provide a kind of solid powder premixing device, including fluid bed and compressed air source unit
Fluid bed is provided with charging aperture, discharging opening, air inlet and gas outlet, and the discharging opening and air inlet are located at the bottom of the fluid bed
Portion, the position that the gas outlet is arranged on the fluid bed are higher than the position that the air inlet is arranged on the fluid bed,
The compressed air source unit is connected with the air inlet.
Further, in addition to a cyclone separator, the import of the cyclone separator and the gas outlet of the fluid bed
Communicate, the outlet of the cyclone separator communicates with the charging aperture of the fluid bed.
Further, the fluid bed is provided with the vibrator for being used for improving fluidization quality.
Further, the vibrator is located at the bottom of the fluid bed.
Further, device for drying and filtering is provided between the compressed air source unit and the air inlet.
Further, flowmeter is provided between the compressed air source unit and the air inlet.
Further, the compressed air source unit is air compressor.
Solid powder premixing device provided by the invention, fluidization premix is carried out to lithium battery solid powder by fluid bed
Conjunction is handled, and all solid powders are obtained into uniformly and rapidly dispersion mixing, is stirred with closing slurry solvent and is carried in next step
For basis.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation of solid powder premixing device provided in an embodiment of the present invention；
Wherein, each reference in figure：
1st, fluid bed；2nd, compressed air source unit；3rd, cyclone separator；4th, vibrator；5th, device for drying and filtering；6th, flowmeter；7th, pacify
Fill flange；8th, feed arrangement.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Drawings and Examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that term " length ", " width ", " height ", " thickness ", " on ", " under ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " head ", " tail " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.
It should also be noted that, unless otherwise clearly defined and limited, " installation ", " connected ", " connection ", " fixation ",
Terms such as " settings " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be with
It is mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements.For the ordinary skill in the art, Ke Yigen
Understand the concrete meaning of above-mentioned term in the present invention according to concrete condition.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the invention, " multiple ", " some " are meant that two or two
More than individual, unless otherwise specifically defined.
Now paste-making method is closed to lithium battery provided by the invention to illustrate.Lithium battery closes paste-making method, comprises the following steps：
S1, the powder for being used for closing each solid constituent material starched is provided according to proportioning and closes slurry solvent；
S2, the powder of each solid constituent material is pre-mixed, obtains hybrid solid powder；
S3, by the hybrid solid powder with it is described conjunction slurry solvent be placed in conjunction slurry retort in carry out conjunction slurry.
Providing the powder of each solid constituent material according to proportioning and closing slurry solvent in step sl be from conventional proportions
Can.
Premixing method can be using mixing sides such as mechanical-physical stirring, concussion stirrings in a mixing bowl in step s 2
Method, as long as being in advance pre-mixed the powder of each solid constituent material uniformly, solid constituent material is generally divided into positive mix
With negative pole powder, it is required for first being pre-mixed respectively to make anode sizing agent and cathode size.Positive mix includes positive electrode active material
Matter, binding agent, conductive agent etc., negative pole powder include negative electrode active material, dispersant, conductive agent etc..
In step s3, it is the hybrid solid powder obtained in step S2 (positive mix or negative pole powder) and conjunction slurry is molten
Agent is that liquid medium is placed into the conjunction slurry that routine is carried out in conjunction slurry retort according to proportioning.Wherein close slurry process and be divided into two again
Kind, i.e. dry blend wet mixing.Dry mixing process is that all hybrid solid powders are added in conjunction slurry retort, is then gradually added into
Close slurry solvent to be stirred, uniform mixing is reached by way of kneading；Wet mixing process is anti-will first to close slurry solvent addition conjunction slurry
Tank is answered, hybrid solid powder stirring is then gradually added into and reaches uniform mixing.Lithium battery provided in an embodiment of the present invention closes slurry side
Method can use dry mixing process when close slurry or use wet mixing process.
Lithium battery provided in an embodiment of the present invention closes paste-making method compared with prior art, by first to lithium battery slurry-stirring process
In the powder of each solid constituent material be first pre-mixed, then hybrid solid powder is stirred with closing slurry solvent and mixed,
Realize the solid powder in lithium battery manufactures and closes slurry process uniformly to mix, further such that follow-up hybrid solid powder is starched with closing
Solvent realizes even slurry, improves the deployment conditions of lithium battery slurry and closes slurry quality, reduce follow-up pole coating it is uneven,
Easily there is the risk of particle.
Further, in step S2, the powder of each solid constituent material is placed in fluid bed 1 according to proportioning carries out fluidization
Premixing.Fluidization is the phenomenon that solid particle shows the mobile performance similar to fluid under action of a fluid, in fluid
Effect is lower to be presented fluidization.Fluid bed endoparticle is in suspended state and ceaselessly moved, so as to cause the mixing of an endoparticle.
In gas-particle two-phase system, the ascending motion of rising pusher's solid in hole in bed, and other places must have equivalent
Solid makees descending motion, so as to cause the dispersed mixing of solid particle macroscopically in bed, is well mixed and mixing velocity is fast.
Further, a kind of embodiment of paste-making method is closed as lithium battery provided by the invention, in step S1,
The operating time of fluidization premixing in fluid bed is 1h~2h, i.e. fluidization processing procedure control was at one hour to two hours
Between.
Present invention also offers a kind of solid powder premixing device for being used to realize above-mentioned solid powder fluidization premixing.
Fig. 1 is referred to, now solid powder premixing device provided by the invention is illustrated.Solid powder premixing device includes fluid bed
1 and compressed air source unit 2, fluid bed 1 is provided with charging aperture, discharging opening, air inlet and gas outlet, and discharging opening and air inlet are located at fluidisation
The bottom of bed, compressed air source unit 2 are connected with air inlet, and compressed air source unit 2 can be air compressor, nitrogen cylinder, inertia gas cylinder, drying
Gas cylinder etc..The position that gas outlet can be arranged on fluid bed 1 is higher than the position that air inlet is arranged on fluid bed 1, ensures outlet
Mouth sets height highly higher than the setting of air inlet, ensures that gas enters from the bottom of fluid bed 1, from top outlet so that more preferable
Fluidization.Compressed air source unit 2 is that fluid bed 1 provides source of the gas power, realizes that fluidization is handled, stops air inlet after the completion of mixing, Gu
Body powder is settled down to the bottom of fluid bed 1, and then being collected from the discharging opening of fluid bed 1 can complete to be pre-mixed.Afterwards will premixing
Rear solid powder (positive mix or negative pole powder) and to close slurry solvent be that liquid medium is placed into conjunction slurry retort and carried out
Slurry is closed in conventional stirring.
Solid powder premixing device provided in an embodiment of the present invention, fluidised form is carried out to lithium battery solid powder by fluid bed
Change premixing processing, all solid powders are obtained into uniformly and rapidly dispersion mixing, in next step with closing slurry solvent stirring
Mixing provides basis.
Further, Fig. 1 is referred to, in order to preferably ensure fluid effect, air outlet is located at the top of fluid bed 1.
Alternatively, Fig. 1 is referred to, the discharge hole structure of fluid bed 1 can be specifically：Set in the bottom of fluid bed 1 removable
Bottom is unloaded, bottom is detachably connected with the body of fluid bed 1 by mounting flange 7, after bottom is dismantled, under the body of fluid bed 1
Portion's opening functions as discharging opening.Stopping air inlet after the completion of mixing, solid powder is settled down to the bottom of fluid bed 1, now dismantles bottom,
The solid powder mixed is collected from discharging opening.
Further, Fig. 1 is referred to, in order to reduce the labor intensity of operator, facilitates the charging of fluid bed, can be set one
Feed arrangement 8 is connected with the charging aperture of fluid bed 1.Alternatively, this feed arrangement 8 can be feed screw structure.
Further, Fig. 1 is referred to, solid powder premixing device provided in an embodiment of the present invention also includes a cyclonic separation
Device 3, the import of cyclone separator 3 communicate with the gas outlet of fluid bed 1, the outlet of cyclone separator 3 and the charging aperture of fluid bed 1
Communicate.In fluidization process, it is understood that there may be a small amount of little particle powder is taken out of with air-flow from the gas outlet of fluid bed 1, takes out of
After this partial particulate collects separation by cyclone separator 3, air-flow discharge, particle is again introduced into stream by the charging aperture of fluid bed 1 again
Change bed 1 to be mixed.
Further, Fig. 1 is referred to, fluid bed 1 is provided with the vibration for the fluidization quality for being used to improve the solid powder
Device 4.Vibrator 4 may be provided at the middle and lower part or bottom of fluid bed, and the vibrating core position of vibrator 4 can adjust, fluidize
Apply the vibration of different directions, different frequency, various amplitude in journey to fluid bed, improve the fluidization matter of solid particle in bed
Amount.
Further, Fig. 1 is referred to, to reach more preferably mixed effect and reducing the consumption of air, vibrator 4 is located at
The bottom of fluid bed 1.
Alternatively, a kind of embodiment as solid powder premixing device provided by the invention, the source of the gas dress
2 are put to dry gas cylinder, certain moisture is typically remained in positive mix, dries the drying gas of gas cylinder offer through the air inlet of fluid bed 1
It is passed through in fluid bed 1, while positive mix is fluidized, dry gas can take away the residual moisture in material by fluid bed 1,
Improve product quality.
Alternatively, Fig. 1 is referred to, as a kind of embodiment of solid powder premixing device provided by the invention,
Compressed air source unit 2 is air compressor, and source of the gas is stably and controllable.
Further, Fig. 1 is referred to, device for drying and filtering 5 is provided between the air inlet of air compressor and fluid bed 1.
Certain moisture is typically remained in positive mix, by the gas of air compressor after drying process, is led to through the air inlet of fluid bed 1
In fluidized bed 1, while positive mix is fluidized, dried gas can take away the residual water in material by fluid bed 1
Point, improve product quality.
Further, Fig. 1 is referred to, flowmeter 6 is provided between compressed air source unit 2 and the air inlet of fluid bed 1, to facilitate prison
Flow measurement processing procedure.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made within principle etc., should be included in the scope of the protection.
Claims (10)
1. lithium battery closes paste-making method, it is characterised in that comprises the following steps：
S1, the powder for being used for closing each solid constituent material starched is provided according to proportioning and closes slurry solvent；
S2, the powder of each solid constituent material is pre-mixed, obtains hybrid solid powder；
S3, by the hybrid solid powder with it is described conjunction slurry solvent be placed in conjunction slurry retort in carry out conjunction slurry.
2. lithium battery as claimed in claim 1 closes paste-making method, it is characterised in that in step S2, each solid constituent material
Powder be placed in fluid bed progress fluidization premixing, obtain the hybrid solid powder.
3. as claimed in claim 2 lithium battery closes paste-making method, it is characterised in that in step S2, the operation of fluidization premixing
Time is 1h~2h.
4. solid powder premixing device, for realizing that powder fluidization of solid constituent material as described in each in claim 2 is pre-
Mixing, it is characterised in that including fluid bed and compressed air source unit, the fluid bed is provided with charging aperture, discharging opening, air inlet and outlet
Mouthful, the discharging opening and air inlet are located at the bottom of the fluid bed, and the gas outlet is arranged on the position on the fluid bed
Put higher than the position that the air inlet is arranged on the fluid bed, the compressed air source unit is connected with the air inlet.
5. solid powder premixing device as claimed in claim 4, it is characterised in that also including a cyclone separator, the rotation
The import of wind separator communicates with the gas outlet of the fluid bed, the outlet and the charging of the fluid bed of the cyclone separator
Mouth communicates.
6. the solid powder premixing device as described in claim 4 or 5, it is characterised in that the fluid bed, which is provided with, to be used to improve
The vibrator of fluidization quality.
7. solid powder premixing device as claimed in claim 6, it is characterised in that the vibrator is located at the fluid bed
Bottom.
8. the solid powder premixing device as described in claim 4 or 5, it is characterised in that the compressed air source unit and the air inlet
Device for drying and filtering is provided between mouthful.
9. the solid powder premixing device as described in claim 4 or 5, it is characterised in that the compressed air source unit and the air inlet
Flowmeter is provided between mouthful.
10. the solid powder premixing device as described in claim 4 or 5, it is characterised in that the compressed air source unit compresses for air
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547125.XA CN107715774A (en) | 2017-07-06 | 2017-07-06 | Lithium battery closes paste-making method and solid powder premixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547125.XA CN107715774A (en) | 2017-07-06 | 2017-07-06 | Lithium battery closes paste-making method and solid powder premixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107715774A true CN107715774A (en) | 2018-02-23 |
Family
ID=61201680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710547125.XA Pending CN107715774A (en) | 2017-07-06 | 2017-07-06 | Lithium battery closes paste-making method and solid powder premixing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112892446A (en) * | 2021-01-18 | 2021-06-04 | 常州驰励粉体材料有限公司 | Powder surface modification device and method |
| CN114247360A (en) * | 2021-12-20 | 2022-03-29 | 宁波亿纬创能锂电池有限公司 | Mixing method of lithium battery solid material |
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