CN106269409A - Coating machine and multi-layer coating method - Google Patents
Coating machine and multi-layer coating method Download PDFInfo
- Publication number
- CN106269409A CN106269409A CN201610976888.1A CN201610976888A CN106269409A CN 106269409 A CN106269409 A CN 106269409A CN 201610976888 A CN201610976888 A CN 201610976888A CN 106269409 A CN106269409 A CN 106269409A
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- Prior art keywords
- coating
- coated
- module
- pole piece
- battery pole
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- 238000000576 coating method Methods 0.000 title claims abstract description 308
- 239000011248 coating agent Substances 0.000 title claims abstract description 283
- 238000000034 method Methods 0.000 claims description 72
- 239000007921 spray Substances 0.000 claims description 69
- 238000005507 spraying Methods 0.000 claims description 59
- 238000010422 painting Methods 0.000 claims description 42
- 238000007591 painting process Methods 0.000 claims description 33
- 239000002904 solvent Substances 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 20
- 238000003618 dip coating Methods 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 18
- 230000033001 locomotion Effects 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 7
- 238000007756 gravure coating Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 94
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 19
- 229910001416 lithium ion Inorganic materials 0.000 description 19
- 238000004146 energy storage Methods 0.000 description 13
- 238000011161 development Methods 0.000 description 7
- 230000018109 developmental process Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C21/00—Accessories or implements for use in connection with applying liquids or other fluent materials to surfaces, not provided for in groups B05C1/00 - B05C19/00
- B05C21/005—Masking devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a coating machine and a multilayer coating method, wherein the coating machine comprises: a base layer coating mechanism for base layer coating of an uncoated battery pole piece (1) by a first coating method; and a multilayer coating mechanism which is arranged at the downstream of the base layer coating mechanism and is used for coating more than one layer on the coating side of the battery pole piece (1) which is coated with the base layer. The invention carries out more than one layer of coating on the battery pole piece which is coated with the base layer by arranging the multilayer coating mechanism at the downstream of the base layer coating mechanism which realizes the function of coating the base layer of the uncoated battery pole piece, thereby realizing the multilayer coating of the battery pole piece coating and effectively improving the comprehensive performance of the battery pole piece.
Description
Technical field
The present invention relates to battery manufacturing field, particularly relate to a kind of coating machine and multi-layer coating method.
Background technology
Owing to lithium ion battery has high voltage, high-energy-density, high security, low self-discharge rate, wide use temperature model
Enclose, long circulation life, memory-less effect, can high current charge-discharge and advantages of environment protection, obtain generation at new energy field
Colleges and universities of various countries of boundary, research unit and enterprise deeply and are studied widely, and have got the biggest development and be widely applied.
Using lithium ion battery as the new-energy automobile driven, non-environmental-pollution, energy utilization rate is high (higher than fuel-engined vehicle
70%).At present, lithium ion battery is that the major impetus that new-energy automobile uses drives source.For the electrokinetic cell of electric automobile,
In addition to having excellent high rate performance and higher volumetric properties, also needing to possess has high concordance, high stability and length
Cyclicity.2015, electric automobile obtained development further, and front 7 month to dates sell 8.96 ten thousand, with promoting compared with last year
2.6 again.Lithium ion battery in the market share of electric automobile, will rise to 37.5% in 2015 from 14% in 2014.Can
Seeing, electric automobile market capacity is big, big to the demand of lithium ion battery, prepares high-quality lithium ion battery and becomes particularly to weigh
Want.
Another of lithium ion battery is applied in 3C field, including mobile phone, PC and consumer electronics product.2014
Year, this lithium ion battery market share shared by block application is up to 81%.The performance of lithium ion battery is needed by this series products
Ask mainly on high-energy-density.But, the lithium ion battery of high-energy-density, generally there are that safety is poor, stability relatively
The defect that the low and life-span is shorter.
Energy storage market, is the emerging market of lithium ion battery.Country to scene energy storage, distributed energy storage, intelligent micro-grid,
The development of household electrical appliances energy storage, communication energy storage and energy-accumulating power station is given policy and is supported down energetically, and the development in energy storage field meets newly
The growth requirement of the energy, the commercially available extensive concern of energy storage and at a quick pace development.Energy storage field raised in the world a research,
The upsurge of development and application.200,000,000,000 will be reached to the year two thousand twenty domestic energy storage market.At present, lithium ion battery answering in energy storage field
Use, than traditional lead-acid battery in energy density, there is in terms of the long-life advantage.But, current energy storage field is to lithium ion
The life-span of battery product has higher requirement.
Future either new-energy automobile, electric motor car or wind energy, solar energy power generating etc., its large-scale promotion and business
Industryization is applied, in addition to the macro environment such as policy, and premise and it is critical only that efficient, green energy storage technology and product.New forms of energy, intelligence
Energy electrical network, electric automobile, the development bottleneck of these following three big new industries both points to same item technology energy storage technology.
The lifting of performance of lithium ion battery, with character feature, inside battery construction features and the preparation technology of material itself
The most relevant.At present, material obtains substantial amounts of research.On high-energy-density, the existing high-tension cobalt acid lithium of positive pole is high
Energy density products application, negative pole has developed the composite graphite material of the silicon materials containing high-energy-density.In stability and peace
Full property aspect, ceramic diaphragm is a representative contribution field.In preparation technology, the relevant device of battery obtains
The most progressive, precision, automatization and yield all have greatly improved.But, the progress of this technique, do not examine
Consider and inside battery structure is optimized, in the manufacturing process of battery, do not occur significantly changing.Such as, coating work
Sequence, is a key operation preparing of lithium ion battery, with high content of technology.It is coated with the coating machine used at present, from biography
The scraper transfer coated of system develops into can realize at present the extrusion coated of higher precision, higher rate.In order to improve production efficiency,
Double spread is also developed.But, the result of coating is all single coating.According to the analysis of inventor, if realizing double
The coating of layer or multilamellar then can be greatly enhanced battery performance, but not yet occurs being capable of bilayer or many both at home and abroad at present
The lithium ion battery coating apparatus of layer coating carries out the coating of bilayer or multilamellar..
Summary of the invention
The purpose of the present invention is to propose to a kind of coating machine and multi-layer coating method, it is possible to realize the multilamellar of battery pole piece coating
Coating.
For achieving the above object, present invention also offers a kind of coating machine, including:
Basal layer coating mechanism, for carrying out basal layer coating by the first painting method to uncoated battery pole piece；
With
Multi-layer coated mechanism, is located at the downstream of described basal layer coating mechanism, for the battery completing basal layer coating
The coated side of pole piece carries out the coating of more than a layer.
Further, described first painting method is scraper transfer coated method, extrusion coated method, gravure
Method or dip-coating method.
Further, described multi-layer coated mechanism includes that at least one is coated with module, and described coating module uses the second painting
The coated side of the battery pole piece after a upper painting process is coated by coating method.
Further, at least one described coating module includes spray module, and the second corresponding painting method is spraying side
Method, for being coated the coated side of the battery pole piece after a upper painting process by spraying method.
Further, described spray module has shower nozzle, and uses gap spray pattern, is used for according to induction apparatus battery
On pole piece, the battery pole piece to motion that senses in each region carries out being interrupted spraying, in order to the district sprayed needs by described shower nozzle
Territory sprays, and stops the spraying of described shower nozzle in the region that need not spraying.
Further, described spray module includes shower nozzle, barrier structure and driver part, and described shower nozzle uses continuous spray
Pattern, for motion battery pole piece carry out continuous spray, described barrier structure under the driving of described driver part with fortune
Dynamic battery pole piece synchronizing moving between described shower nozzle and the battery pole piece of motion, in order to carry out continuous spray at described shower nozzle
Time, the region that the battery pole piece to motion need not spraying is blocked.
Further, described in need not the region of spraying be tab welding district, the region of described needs spraying includes described
The region having been coated with outside tab welding district and white space.
Further, described barrier structure includes on baffle plate, the shape of described baffle plate and area and described battery pole piece not
The region needing spraying matches.
Further, between described basal layer coating mechanism and described multi-layer coated mechanism and described multi-layer coated
In mechanism, the downstream of each described coating module is provided with baking unit, for toasting coating, to eliminate coating
Mobility.
Further, at least one described coating module includes spray module, and the second corresponding painting method is spraying side
Method, for being coated the coated side of the battery pole piece after a upper painting process by spraying method；If described spray
It is coated with the solvent of coating sizing-agent of the module described basal layer coating mechanism corresponding with a upper painting process or described multilayer coater
When in structure, the solvent phase of the coating sizing-agent of a certain described coating module is same or belongs to one species, then in described spray module and institute
The baking unit stated between basal layer coating mechanism or a certain described coating module does not carries out coating baking to battery pole piece.
Further, at least one described coating module includes:
Scraper transfer coated module, the second corresponding painting method is scraper transfer coated method, for by scraping swivel
Move coating process the coated side of the battery pole piece after a upper painting process is coated；
Extrusion coated module, the second corresponding painting method is extrusion coated method, for by extrusion coated method pair
The coated side of the battery pole piece after a upper painting process is coated；
Gravure module, the second corresponding painting method is gravure coating method, is used for passing through intaglio process
The coated side of the battery pole piece after a upper painting process is coated by brush coating process；And/or
Dip-coating module, the second corresponding painting method is dip-coating method, for being coated with through upper one by dip-coating method
The coated side of the battery pole piece after operation is coated.
Further, the spray rate of described spray module is 0.1～8L/min, and/or the solid content of spraying slurry exists
0.5～30%, and/or spraying thickness be 0.5～100 μm.
Further, described scraper transfer coated module, extrusion coated module, gravure module and/or dip-coating
The coating thickness of module is 1～300 μm.
Further, the energy of the coating in the inner part that described basal layer coating mechanism and described multi-layer coated mechanism are realized
Metric density is not less than coating in the outer part, and/or the coating that the safety and stability of coating in the inner part is the most in the outer part.
For achieving the above object, the invention provides a kind of multi-layer coating method based on aforesaid coating machine, including:
Basal layer coating mechanism carries out basal layer coating by the first painting method to uncoated battery pole piece；
The coated side of the multi-layer coated mechanism battery pole piece to completing basal layer coating carries out the coating of more than a layer.
Further, described multi-layer coated mechanism includes that at least one is coated with module, at least one described coating module bag
Include spray module；The coated side of the described multi-layer coated mechanism battery pole piece to completing basal layer coating carries out the painting of more than a layer
The operation of cloth includes:
The coated side of the battery pole piece after a upper painting process is coated with by described spray module by spraying method
Cloth.
Further, described multi-layer coated mechanism include at least one be coated with module, described basal layer coating mechanism with
Between described multi-layer coated mechanism, and in described multi-layer coated mechanism, the downstream of each described coating module is provided with baking
Unit；Described multi-layer coating method also includes:
After forming coating, by described baking unit, coating is toasted, to eliminate the mobility of coating.
Further, at least one described coating module includes spray module, and the second corresponding painting method is spraying side
Method, for being coated the coated side of the battery pole piece after a upper painting process by spraying method；Described multilamellar is coated with
Cloth method also includes:
If the described basal layer coating machine that the solvent of the coating sizing-agent of described spray module is corresponding with a upper painting process
When in structure or described multi-layer coated mechanism, the solvent phase of the coating sizing-agent of a certain described coating module is same or belongs to one species, then
Baking unit between described spray module and described basal layer coating mechanism or a certain described coating module is not to battery pole
Sheet carries out coating baking.
Further, the energy density of coating in the inner part is not less than coating in the outer part, and/or coating in the inner part
Safety and stability coating the most in the outer part.
Based on technique scheme, the present invention is by realizing the basal layer coating function to uncoated battery pole piece
The downstream of basal layer coating mechanism arranges multi-layer coated mechanism, and the battery pole piece completing basal layer coating is carried out more than one layer
Coating, and then realize the multi-layer coated of battery pole piece coating, be effectively improved the combination property of battery pole piece.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the principle schematic of an embodiment of coating machine of the present invention.
Fig. 2 is the structural representation of the spray module in coater examples of the present invention.
The schematic diagram of the battery pole piece that Fig. 3 is coated with by coater examples of the present invention.
Fig. 4 is the principle schematic of another embodiment of coating machine of the present invention.
Fig. 5 is the principle schematic of the another embodiment of coating machine of the present invention.
Detailed description of the invention
Below by drawings and Examples, technical scheme is described in further detail.
It is previously mentioned that inventor analyzes double-deck or multilamellar the coating of realization and should be able to be greatly enhanced battery performance, in order to
Realize the double-deck or coating processing of multilamellar, the invention provides a kind of coating machine, including: basal layer coating mechanism be arranged on institute
State the multi-layer coated mechanism in basal layer coating mechanism downstream.Basal layer coating mechanism is used for by the first painting method uncoated
Battery pole piece carry out basal layer coating.Here basal layer coating mechanism can use conventional monolayers coating apparatus or processing module
Realizing, its first painting method used can be scraper transfer coated method, extrusion coated method, gravure coating method
Or dip-coating method, but it is not limited only to these painting methods, other any coating that can realize coating paste on battery pole piece
Method all can use.
Multi-layer coated mechanism is located at the downstream of basal layer coating mechanism, it is possible to the battery pole piece completing basal layer coating
Coated side carries out the coating of more than a layer.Multi-layer coated mechanism may particularly include at least one coating module, described coating module
Use the second painting method that the coated side of the battery pole piece after a upper painting process is coated.The most multi-layer coated mechanism
Can only have one coating module, to realize the coating of the second coating on basal layer, it is also possible to include two or three with
On coating module, to realize the 3rd coating, the 4th coating and the coating of more multicoat on basal layer.
Here coating module can use traditional single coating equipment or processing module to realize, the second coating i.e. used
Method can be with scraper transfer coated method, extrusion coated method, gravure coating method or dip-coating method, i.e. multilayer coater
At least one coating module included by structure specifically includes: scraper transfer coated module, extrusion coated module, gravure
Module and/or dip-coating module.Coating module can also be unconventional spray module, i.e. its second painting method used is spray
Coating method, for being coated the coated side of the battery pole piece after a upper painting process by spraying method.
Second painting method corresponding to scraper transfer coated module is scraper transfer coated method, for being shifted by scraper
The coated side of the battery pole piece after a upper painting process is coated by coating process.Extrusion coated module corresponding second
Painting method is extrusion coated method, for by the painting to the battery pole piece after a upper painting process of the extrusion coated method
Layer side is coated.Second painting method corresponding to gravure module is gravure coating method, for by recessed
The coated side of the battery pole piece after a upper painting process is coated by version printing coating process.Dip-coating module corresponding
Two painting methods are dip-coating method, for being entered the coated side of the battery pole piece after a upper painting process by dip-coating method
Row coating.
Second painting method is not limited only to the above painting method, and other is any can realize coating on battery pole piece
The painting method of slurry all can use.If multi-layer coated mechanism has plural coating module, then each coating module
The second painting method used can be identical, it is also possible to different.
At least one coating module in basal layer coating mechanism and multi-layer coated mechanism can along production process continuously or
Compartment of terrain is arranged in series, to realize the battery pole piece painting process in battery manufacturing process, after defining laminated coating, permissible
Use the operation identical with conventional batteries manufacturing process to operate, such as, after forming laminated coating, enter oven for drying, then
Carry out roll-in, point bar, film-making, wind, enter shell, vacuum drying, fluid injection, seal, be melted into, aging, partial volume etc., be only for example herein
Illustrating that coating machine of the present invention acts on played in battery manufacturing process, the implementation of other each operation does not repeats them here.
As it is shown in figure 1, be the principle schematic of an embodiment of coating machine of the present invention.In conjunction with the spray module shown in Fig. 2
Battery pole piece shown in structure and Fig. 3, the coating module in the present embodiment is spray module, and basal layer coating mechanism can use
Traditional single coating equipment, the most not shown, spray module is then for being coated with work by spraying method to through upper one
The coated side of the battery pole piece 1 after sequence (exactly through basal layer painting process for the present embodiment) is coated.
Specifically, spray module can include that shower nozzle 2, barrier structure and driver part, shower nozzle 2 can use continuous spray
Pattern, its can to motion battery pole piece 1 carry out continuous spray, barrier structure can be with motion under the driving of driver part
Battery pole piece 1 described shower nozzle 2 and motion battery pole piece 1 between synchronizing moving, in order to spray continuously at described shower nozzle 2
Tu Shi, the region that the battery pole piece 1 to motion need not spraying is blocked.
The mentioned herein region that need not spraying is tab welding district 1.2, and this subregion is used for soldering polar ear, as
Fruit is sprayed thereon, then can affect welding and conductive effect, therefore need not this region is carried out spraying operation.Need
The region of spraying includes the region 1.1 having been coated with outside tab welding district 1.2 and white space 1.3.Here have been coated with district
Territory 1.1 is the region after a upper painting process coating, the most again by shower nozzle 2 painting that spraying function layer is corresponding on it
Layer slurry.
Barrier structure includes that baffle plate 3, the shape of described baffle plate 3 and area can need not spraying on battery pole piece 1
Region matches.Spraying process in view of battery pole piece 1 uses the mode being carried out continuously, i.e. battery pole piece 1 driving at roller bearing 5
Move along its length under Dong, and shower nozzle 2 is relatively fixed motionless, which results in the different regions fortune also with battery pole piece 1
Moving and move, baffle plate 3 can be synchronized with the movement along with the motion of battery pole piece 1 under the driving effect of driver part, drive division
Part can be belt gear 4, chain-drive mechanism, rack and pinion drive mechanism etc..Utilize the barrier effect of baffle plate 3, work as spray
The spraying area of 2 is with when need not the area coincidence of spraying, and baffle plate 3 can block the slurry that shower nozzle 2 is sprayed, and does not make it fall
On the region that need not spraying.The spray module of this employing mechanical drive mode is reliable, controls process relatively simple.
Need in the region of spraying, have been coated with region 1.1 and then define new coating through spraying, therefore, it is possible to obtain phase
Than the performance more excellent in existing single coating battery pole piece.And the collector in view of the both positive and negative polarity as battery is respectively conduction
Property good metal material, when being short-circuited at metal, short circuit current can be very big, easily causes safety issue, and works as
The coating (the most not having the aluminum oxide coating layer etc. of electric conductivity) that white space 1.3 is formed after spraying has insulating properties, just
The short circuit current caused by contact in negative pole Kong Bo district can be greatly reduced, and then improves the security performance of battery.
Barrier structure is not limited in the form of baffle plate, it would however also be possible to employ other structure, the most also can play barrier effect
Moving containers, can accept shower nozzle ejection slurry.Shower nozzle 2 is in addition to can using continuous spray pattern, it is also possible to utilize
Sensor and controller realize gap spray pattern, i.e. according to the induction apparatus sensing to region each on battery pole piece 1, it is right to come
The battery pole piece 1 of motion carries out being interrupted spraying, in order to is sprayed, by shower nozzle 2, the region needing spraying, and need not
The region of spraying stops described shower nozzle 2 and sprays.In other words, by induction nozzle to which of battery pole piece 1 work as proparea
Territory, carries out spraying or stop spraying the most accordingly.The spray module of the automatically controlled mode of this employing, it is the most careful to control.
It is to be formed by the coating paste with certain fluidity in view of coating, therefore to the coating avoided the formation of
Subsequent handling is destroyed, can be between basal layer coating mechanism and multi-layer coated mechanism and every in multi-layer coated mechanism
The downstream of individual coating module is provided with baking unit 6, for toasting coating, to eliminate the mobility of coating.Such as
In Fig. 1, the downstream of spray module is provided with baking unit 6, and the battery pole piece through spraying is oven-dried when by baking unit 6, with
Eliminate the mobility of coating.Accordingly, it is located between basal layer coating mechanism and spray unit and also there is baking unit, at Fig. 1
In be not shown.
For spray module, if the solvent of the coating sizing-agent of spray module (dispersant) and a upper painting process pair
The solvent phase of the coating sizing-agent of a certain coating module in the basal layer coating mechanism answered or multi-layer coated mechanism is same or belongs to same
During one kind, such as, broadly fall into aqueous systems solvent or broadly fall into organic solvent etc., then can make the baking before spray module
Unit 6 does not carries out coating baking to battery pole piece 1.In other words, when a upper coating coating sizing-agent solvent with will spray
Slurry solvent identical or when belonging to one species, the battery pole piece not carrying out toasting is in relatively low temperature, on battery pole piece
Slurry solvent volatilization less, show as the state do not dried, now coating still suffered from slurry solvent, when the slurry of same system
When material is sprayed in the coating do not dried, combinable more tight between new and old coating, improve the bonding between coating
Power, and also improve working (machining) efficiency.In another embodiment, it is also possible to do not consider that coating is all dried by solvent species
Operation.
For spray module, control quantity for spray by realizing the solid content of different spray rate and slurry, excellent
The spray rate of choosing is 0.1～8L/min, and the solid content of spraying slurry is 0.5～30%.And quantity for spray is finally by coating thickness
Determining, the thickness preferably sprayed is 0.5～100 μm.
Fig. 4 and Fig. 5 shows the other two embodiment of coating machine, and the coating module on the left of Fig. 4 and Fig. 5 is scraper transfer
Coating module 7, this module is as the coating module of second layer coating, and basal layer coating module is not given in figures 4 and 5 and being shown
Go out.Distinguishing, in Fig. 4, the coating module as third layer coating is spray module, and as the painting of third layer coating in Fig. 5
Cloth module is scraper transfer coated module 7 '.Baking it is equipped with single after scraper transfer coated module 7,7 ' and spray module
Unit, for drying the coating after coating.Baking unit in Fig. 4 can also be according to the solvent of current spraying slurry and upper
Whether the slurry solvent of one coating is that same type chooses whether to carry out drying and processing.Scraper transfer coated module 7 can be passed through
Controlling scraper gap and control coating layer thickness and surface density, make coating layer thickness in 1～300 μm, surface density is 50～500g/m2。
In another embodiment, the coating module in Fig. 4 and Fig. 5 can also replace with extrusion coated module, intaglio printing
Coating module or dip-coating module etc..Scraper transfer coated module, extrusion coated module, gravure module and/or dip-coating
The parameter of module major control be the thickness of coating, preferably coating thickness be 1～300 μm.
It is previously mentioned that the purpose of multicoat is to improve the performance of battery pole piece, and by playing between each coating
The advantage of some coatings, suppresses the inferior position of some coatings, then battery pole piece can be made to show extremely excellent combination property.Examine
Consider to coating diversity in energy density, stability and safety, preferably make basal layer coating mechanism and described multilamellar be coated with
The energy density of the coating in the inner part that cloth mechanism is realized is not less than coating in the outer part, and/or the peace of coating in the inner part
Full property and stability coating the most in the outer part.
For example, the coating (the most nickelic ternary material coating) of high-energy-density generally less stable, therefore
Preferably it is coated onto relative to described battery pole piece coating location in the inner part, and the higher coating of stability (such as aoxidizes
Aluminized coating or LiMn2O4 coating) it is preferably coated on coating location in the outer part, it is possible to suppress the material of high-energy-density in the inner part
Reaction, improve the stability that battery pole piece is overall.
Each coater examples detailed above is at the principle of coating battery pole piece and structure, applied battery
Pole piece goes for all kinds of battery pole piece, including secondary cell, and the battery pole of the lithium ion battery being widely used at present
Sheet.Processing by the multicoat on battery pole piece, it is possible to increase the concordance of lithium ion battery of electric automobile, high stability
With long circulating, improve the safety of the lithium ion battery with high-energy-density, stability and the cyclicity being used in mobile phone.
Accordingly, based on aforesaid coater examples, present invention also offers a kind of multi-layer coating method, including: base
Prime-coating mechanism carries out basal layer coating by the first painting method to uncoated battery pole piece 1；Multi-layer coated mechanism pair
The coated side of the battery pole piece 1 completing basal layer coating carries out the coating of more than a layer.
Wherein, multi-layer coated mechanism can include that at least one is coated with module, and at least one described coating module includes spray
It is coated with module；The coated side of the described multi-layer coated mechanism battery pole piece 1 to completing basal layer coating carries out the coating of more than a layer
Operation include: the coated side of the battery pole piece 1 after a upper painting process is entered by described spray module by spraying method
Row coating.
In another embodiment, described multi-layer coated mechanism can include that at least one is coated with module, at described basal layer
Between coating mechanism and described multi-layer coated mechanism, and in described multi-layer coated mechanism, the downstream of each described coating module is equal
It is provided with baking unit 6；Described multi-layer coating method also includes: after forming coating, entered coating by described baking unit 6
Row baking, to eliminate the mobility of coating.
Further, at least one described coating module includes spray module, and the second corresponding painting method is spraying side
Method, for being coated the coated side of the battery pole piece 1 after a upper painting process by spraying method；Described multilamellar is coated with
Cloth method also includes: if the described basal layer painting that the solvent of the coating sizing-agent of described spray module is corresponding with a upper painting process
In cloth mechanism or described multi-layer coated mechanism, the solvent phase of the coating sizing-agent of a certain described coating module is same or belongs to one species
Time, then the baking unit 6 between described spray module and described basal layer coating mechanism or a certain described coating module is the most right
Battery pole piece 1 carries out coating baking.
In the various embodiments described above, the energy density of coating in the inner part is preferably made to be not less than coating in the outer part, and/or
The safety and stability of coating in the inner part coating the most in the outer part.
Above-mentioned multi-layer coating method embodiment implement and functional effect all refer to aforementioned to coating machine implement
The explanation of example, is not repeating.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to preferred embodiment, and those of ordinary skill in the field are it is understood that still
The detailed description of the invention of the present invention can be modified or portion of techniques feature is carried out equivalent；Without deviating from this
The spirit of bright technical scheme, it all should be contained in the middle of the technical scheme scope that the present invention is claimed.
Claims (19)
1. a coating machine, it is characterised in that including:
Basal layer coating mechanism, for carrying out basal layer coating by the first painting method to uncoated battery pole piece (1)；With
Multi-layer coated mechanism, is located at the downstream of described basal layer coating mechanism, for the battery pole piece completing basal layer coating
(1) coated side carries out the coating of more than a layer.
Coating machine the most according to claim 1, it is characterised in that described first painting method is scraper transfer coated side
Method, extrusion coated method, gravure coating method or dip-coating method.
Coating machine the most according to claim 1, it is characterised in that described multi-layer coated mechanism includes that at least one is coated with mould
Block, described coating module uses the second painting method to carry out the coated side of the battery pole piece (1) after a upper painting process
Coating.
Coating machine the most according to claim 3, it is characterised in that at least one described coating module includes spray module,
The second corresponding painting method is spraying method, is used for by spraying method the battery pole piece after a upper painting process
(1) coated side is coated.
Coating machine the most according to claim 4, it is characterised in that described spray module has shower nozzle (2), and uses gap
Spray pattern, is interrupted for sensing the battery pole piece (1) to motion according to induction apparatus each region upper to battery pole piece (1)
Spraying, in order to the region needing spraying is sprayed by described shower nozzle (2), and stop described in the region that need not spraying
Shower nozzle (2) sprays.
Coating machine the most according to claim 4, it is characterised in that described spray module include shower nozzle (2), barrier structure and
Driver part, described shower nozzle (2) uses continuous spray pattern, for the battery pole piece (1) of motion is carried out continuous spray, described
Barrier structure under the driving of described driver part with motion battery pole piece (1) described shower nozzle (2) and move battery pole
Synchronizing moving between sheet (1), in order to when described shower nozzle (2) carries out continuous spray, the battery pole piece (1) to motion need not
The region of spraying is blocked.
7. according to the coating machine described in claim 5 or 6, it is characterised in that described in need not spraying region be tab welding
District (1.2), the described region needing spraying includes the region (1.1) having been coated with outside described tab welding district (1.2) and sky
White region (1.3).
Coating machine the most according to claim 6, it is characterised in that described barrier structure includes baffle plate (3), described baffle plate
(3) region that need not spraying on shape and area and described battery pole piece (1) matches.
Coating machine the most according to claim 3, it is characterised in that multi-layer coated with described at described basal layer coating mechanism
Between mechanism, and in described multi-layer coated mechanism, the downstream of each described coating module is provided with baking unit (6), is used for
Coating is toasted, to eliminate the mobility of coating.
Coating machine the most according to claim 9, it is characterised in that at least one described coating module includes spray module,
The second corresponding painting method is spraying method, is used for by spraying method the battery pole piece after a upper painting process
(1) coated side is coated；If described corresponding with a upper painting process of the solvent of the coating sizing-agent of described spray module
In basal layer coating mechanism or described multi-layer coated mechanism, the solvent phase of the coating sizing-agent of a certain described coating module is same or belongs to
During one species, then the baking list between described spray module and described basal layer coating mechanism or a certain described coating module
Unit (6) does not carries out coating baking to battery pole piece (1).
11. coating machines according to claim 3, it is characterised in that at least one described coating module includes:
Scraper transfer coated module (7,7 '), the second corresponding painting method is scraper transfer coated method, is used for passing through scraper
The coated side of the battery pole piece (1) after a upper painting process is coated by transfer coated method；
Extrusion coated module, the second corresponding painting method is extrusion coated method, is used for by extrusion coated method process
The coated side of the battery pole piece (1) after a upper painting process is coated；
Gravure module, the second corresponding painting method is gravure coating method, for being brushed by intaglio process
The coated side of the battery pole piece (1) after a upper painting process is coated by cloth method；And/or
Dip-coating module, the second corresponding painting method is dip-coating method, is used for by dip-coating method through a upper painting process
After the coated side of battery pole piece (1) be coated.
12. coating machines according to claim 4, it is characterised in that the spray rate of described spray module is 0.1～8L/
Min, and/or the solid content of spraying slurry is 0.5～30%, and/or the thickness of spraying is 0.5～100 μm.
13. coating machines according to claim 11, it is characterised in that described scraper transfer coated module (7,7 '), extruding
The coating thickness of coating module, gravure module and/or dip-coating module is 1～300 μm.
14. coating machines according to claim 1, it is characterised in that described basal layer coating mechanism and described multi-layer coated
The energy density of the coating in the inner part that mechanism is realized is not less than coating in the outer part, and/or the safety of coating in the inner part
Property and stability coating not higher than the most in the outer part.
15. 1 kinds of multi-layer coating methods based on the arbitrary described coating machine of claim 1～14, it is characterised in that including:
Basal layer coating mechanism carries out basal layer coating by the first painting method to uncoated battery pole piece (1)；
The coated side of the multi-layer coated mechanism battery pole piece (1) to completing basal layer coating carries out the coating of more than a layer.
The multi-layer coating method of 16. coating machines according to claim 15, it is characterised in that described multi-layer coated mechanism wraps
Including at least one coating module, at least one described coating module includes spray module；Described multi-layer coated mechanism is to completing base
The operation of the coating that the coated side of the battery pole piece (1) of prime-coating carries out more than a layer includes:
The coated side of the battery pole piece (1) after a upper painting process is coated with by described spray module by spraying method
Cloth.
The multi-layer coating method of 17. coating machines according to claim 15, it is characterised in that described multi-layer coated mechanism wraps
Including at least one coating module, between described basal layer coating mechanism and described multi-layer coated mechanism, and described multilamellar is coated with
In cloth mechanism, the downstream of each described coating module is provided with baking unit (6)；Described multi-layer coating method also includes:
After forming coating, by described baking unit (6), coating is toasted, to eliminate the mobility of coating.
The multi-layer coating method of 18. coating machines according to claim 17, it is characterised in that at least one described coating mould
Block includes spray module, and the second corresponding painting method is spraying method, for being coated with work by spraying method to through upper one
The coated side of the battery pole piece (1) after sequence is coated；Described multi-layer coating method also includes:
If the described basal layer coating mechanism that the solvent of the coating sizing-agent of described spray module is corresponding with a upper painting process or
When in described multi-layer coated mechanism, the solvent phase of the coating sizing-agent of a certain described coating module is same or belongs to one species, then in institute
State the baking unit (6) between spray module and described basal layer coating mechanism or a certain described coating module not to battery pole piece
(1) coating baking is carried out.
The multi-layer coating method of 19. coating machines according to claim 15, it is characterised in that the energy of coating in the inner part
Density is not less than coating in the outer part, and/or the coating that the safety and stability of coating in the inner part is the most in the outer part.
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