CN101966509B - Dispersing and spraying automatic continuous production system of electrode paste of power battery - Google Patents
Dispersing and spraying automatic continuous production system of electrode paste of power battery Download PDFInfo
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- CN101966509B CN101966509B CN201010265719XA CN201010265719A CN101966509B CN 101966509 B CN101966509 B CN 101966509B CN 201010265719X A CN201010265719X A CN 201010265719XA CN 201010265719 A CN201010265719 A CN 201010265719A CN 101966509 B CN101966509 B CN 101966509B
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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
Abstract
The invention discloses a dispersing and spraying automatic continuous production system of electrode paste of a power battery, which comprises a proportioner, an initial stirring device, a paste dispersing device, a filtering device and a spraying device, wherein the proportioner is used for proportioning materials according to a set proportion, then the proportioned materials are transmitted into the initial stirring device for stirring, the initial stirring device is connected with the paste dispersing device which is connected with the filtering device, the filtering device is connected with the spraying device; and the paste dispersing device comprises a reaction pipe and at least one clamp type ultrasound processor, and the at least one clamp type ultrasound processor is clamped on the reaction pipe through a functional clamp. The invention has the advantages that small particles in the paste can be effectively dispersed uniformly by the two-stage ultrasound paste dispersing device so as to overcome phenomena of the agglomeration and the like; the sprayed electrode paste material is good in flexible and flat consistency, can effectively reduce the internal resistance and improve the property of the lithium ion power battery; and the spraying and adhering firm, flexible and flat consistency quality is improved, and the production cost can be effectively lowered.
Description
Technical field
The present invention relates to the battery material manufacture technology field, the electrokinetic cell electrode slurry decentralized system that is specially a kind of dispersing uniformity and coating uniformity high-quality is coated with the automatic continuous production system.
Background technology
Lithium-ion-power cell is a kind of to satisfy the large-scale lithium ion battery of big capacity, high power of hybrid-electric car, pure electric automobile, electric bicycle, battery-operated motor cycle, uninterrupted power source, hay mover, mine lamp and Compact Power Plant power storage and conversion.Lithium-ion-power cell can use electric energy to replace petroleum-based energy at wide spectrum, is the clean energy resource of a kind of ten minutes friendly environment, energy-saving and emission-reduction, low-carbon (LC).The characteristics that lithium-ion-power cell has the energy density height, security is good and have extended cycle life have become the first-selected energy that moves of electric motor car, therefore, develop lithium-ion-power cell in a large number and have important social and economic significance.Yet the obstacle that the development of lithium-ion-power cell exists is a lot, and wherein positive electrode is the major obstacle that lithium-ion-power cell is used.
The positive electrode that lithium-ion-power cell possibly adopt has cobalt acid lithium (LiCoO
2), lithium nickelate (LiNiO
2), LiFePO 4 (LiFePO
4), LiMn2O4 (Li
2MnO
4) four kinds.Wherein cobalt acid lithium cost an arm and a leg, poor safety performance, the lithium nickelate poor safety performance, the dissolving of manganese causes that capacity descends fast under the LiMn2O4 high temperature, can not satisfy the electrokinetic cell requirement.LiFePO 4 low price, good, the environmental friendliness of security are fit to the requirement of high-power lithium ion electrokinetic cell, are considered to the best positive electrode of lithium-ion-power cell at present.
At present; The preparation method of the positive electrode of lithium-ion-power cell generally is to prepare burden by the proportioning of setting through dispensing equipment earlier; Tentatively stir then, continue to inject non-conservation tank after the dispersed with stirring, after dispersed with stirring, filter through filter; The entering coating machine is coated with under the state that stirs, and rolling is got up on the rolling frame at last.Though in above-mentioned production technology, passed through repeatedly dispersed with stirring and last filtration; But owing to be added with the small material of a certain amount of nanoscale particle diameter in the present positive electrode; Like conductive agents such as VGCF (carbon fiber) and CNTs (CNT), metal nano materials; To tens nanometers, length is at more than tens microns several centimetres even in several nanometers for their diameters.Material granule is more little, disperse just more difficult even, follow-up coating also more difficulty accomplish evenly.Electrode slurry should belong to the thixotropic fluid in the non-newtonian fluid, the thickness when characteristics of such fluid are static, even be solid-state, be easy to flow but the stirring back is thinning.Binding agent is linearity or network structure under submicroscopic state, and during stirring, these are destructurized, and is mobile all right, static after, they form again, and are mobile with regard to variation.The LiFePO 4 particle is tiny, and under the equal quality, amounts of particles increases, and connect the effective conductive network of composition to them, the also corresponding increase of amount of the conductive agent that needs.Particle is little, the conductive agent consumption increases, and required binding agent consumption also rises.When leaving standstill, form network structure more easily, mobile than conventional material difference.Take out disposed slurry to the process of coating from agitator, adopt all turning barrels to shift, in the process slurry do not stir or stirring intensity low, the flowability of slurry changes, to such an extent as to the thickness that becomes gradually is as jelly.Mobile bad, the homogeneity that causes being coated with is bad, shows as pole piece surface density tolerance and increases, and surface topography is bad, has a strong impact on quality.
Because the homogeneity question of material can not get solving; Follow-uply a lot of quality problems will occur: crawling is even, and uniformity is poor, because the LiFePO 4 specific area is big, the binding agent consumption is big; Needed solvent load is also just big during the preparation slurry, and coating back drying is also just comparatively difficult; The particle of ferrousphosphate lithium material is little, and specific area has added greatly much than the sour lithium of cobalt, LiMn2O4, and the binding agent that needs is also just more.But binding agent is used many, reduces content of active substance, and energy density just reduces, so under possible situation, can reduce the binding agent consumption as possible in the battery production process.For improving bond effect; The common practice of present LiFePO 4 processing improves the molecular weight (molecular weight is high, and cementitiousness improves, but dispersion is more difficult, impedance is high more) of binding agent on the one hand; Be to improve the binding agent consumption on the one hand, as if the result also is not satisfactory at present; At present the LiFePO 4 pole piece adds man-hour, generally feel pole piece more firmly, more crisp, concerning lamination, possibly influence not obvious, but when reeling, just very unfavorable.The pole piece poor in flexibility, just dry linting, fracture easily causes unfavorable conditions such as short circuit when reeling bending.The mechanism explain of this respect it be unclear that, and conjecture is the group structure problem of particle and cause the elastic space of coating little.Reducing compacted density can make moderate progress, but volume energy density has also just reduced like this.Originally the compacted density of LiFePO 4 is just lower, reduces compacted density and be the means that just can take of not being able to; Will cause simultaneously waste serious, production cost is than higher.Above-described problem also significantly exists in the negative material of electrokinetic cell, therefore existing technology is badly in need of and will be improved.
Summary of the invention
Deficiency to the prior art existence; The present invention puts forth effort on slurry granularity, dispersion, evenly, the flexible basic improvement of bonding; Thereby reach the resultant effect that improves electrokinetic cell electrode slurry coating quality; Can reduce production costs effectively simultaneously, deal with problems, propose a kind of electrokinetic cell electrode slurry decentralized system and be coated with the automatic continuous production system from the microcosmic degree of depth.
To achieve these goals; The technical scheme that the present invention adopted is: electrokinetic cell electrode slurry decentralized system is coated with the automatic continuous production system, comprises proportioner, initial agitating device, pulp dispersing device, filter and apparatus for coating, and proportioner is prepared burden by setting proportioning; Importing initial agitating device then stirs; Initial agitating device is connected the electrode material input pulp dispersing device that will tentatively stir and disperses with pulp dispersing device, pulp dispersing device is connected with filter, and filter is connected with apparatus for coating; Be provided with coil cradle behind the apparatus for coating, with the positive electrode after the rolling coating; Described pulp dispersing device comprises reaction tube and forceps-shaped ultrasonic processor, and a minimum forceps-shaped ultrasonic processor is clamped on the reaction tube through function fixture.In the reaction tube of electrokinetic cell electrode slurry after stirring at pulp dispersing device; Carry out the vibrations cavitation of the degree of depth disperses through ultrasonic wave; Overcome the non-uniform phenomenons such as reunion that the nanoscale fine particle possibly cause effectively, improve the operability and consistent uniformity of coating.
Pipeline between described initial agitating device and the pulp dispersing device is provided with the viscosimeter of online detection viscosity.
Described forceps-shaped ultrasonic processor comprises transducer assemblies and function fixture, and transducer assemblies comprises transducer and horn, and transducer is connected with horn, and a minimum transducer assemblies is connected with function fixture.
Be provided with the non-conservation tank and second pulp dispersing device between described pulp dispersing device and the filter, pulp dispersing device is connected with non-conservation tank through mashing pump, and non-conservation tank is connected with second pulp dispersing device, and second pulp dispersing device is connected with filter.
Pipeline between the described non-conservation tank and second pulp dispersing device is provided with the viscosimeter of online detection viscosity, carries out on-line monitoring with the uniformity to the slurry of electrode material.
Be provided with slurry tank between described filter and the apparatus for coating, be provided with direct insertion ultrasonic dispersing device in the slurry tank, direct insertion ultrasonic dispersing device is connected with the transmission motor, transmits the direct insertion ultrasonic dispersing device of motor-driven and in slurry tank, moves.
Described direct insertion ultrasonic dispersing device is fixed on the locking fixture through the locking flange, and locking fixture is connected with the adjustment piece, the flexible connection of adjustment piece and front and back adjustment piece, and front and back are adjusted piece and are movably arranged on the mounting blocks, and mounting blocks is connected with the transmission motor.
Described direct insertion ultrasonic dispersing device comprises ultrasonic transducer, horn and ultrasonic wave function rod; Described ultrasonic transducer is connected with horn; Horn is connected with ultrasonic wave function rod; Be outside equipped with stainless steel outer sleeve at ultrasonic wave function rod, be provided with recirculated water heat exchange interlayer in the stainless steel outer sleeve, be outside equipped with cooling water inlet and coolant outlet in stainless steel outer sleeve.
Compared with prior art, the advantage that the present invention has is: the ultrasonic pulp dispersal device through two-stage disperses, and the molecule in the slurry is uniformly dispersed, and overcomes negative phenomenas such as reunion; Electrode material high conformity after the coating can reduce internal resistance effectively, improves the performance of lithium-ion-power cell; The raising conforming while of coating can reduce production costs effectively.
Description of drawings
Fig. 1 is coated with the structural representation of automatic continuous production system for electrokinetic cell electrode slurry decentralized system of the present invention;
Fig. 2 is coated with the structure chart of the intrasystem pulp dispersing device of automatic continuous production for electrokinetic cell electrode slurry decentralized system of the present invention;
Fig. 3 is coated with the structure chart of the intrasystem direct insertion ultrasonic dispersing device of automatic continuous production for electrokinetic cell electrode slurry decentralized system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment electrokinetic cell electrode slurry decentralized system of the present invention is coated with the automatic continuous production system and carries out detailed explanation.
Electrokinetic cell electrode slurry decentralized system is coated with the automatic continuous production system, and is as shown in Figure 1, comprises proportioner 1, initial agitating device 2, pulp dispersing device 4, filter 6 and apparatus for coating 11.Proportioner 1 and initial agitating device 2 are connected through pipeline, and proportioner 1 is prepared the electrode slurry material in the ratio of setting, imports then in the initial agitating device 2 and tentatively stirs.Initial agitating device 2 can be the fixed star mixer.Initial agitating device 2 and pulp dispersing device 4 are connected through pipeline, will be through the tentatively slurries further dispersion in pulp dispersing device 4 of stirring of initial agitating device 2.Pipeline between initial agitating device 2 and the pulp dispersing device 4 is provided with the viscosimeter 3 of online detection viscosity.Pulp dispersing device 4 is connected with filter 6, and filter 6 is connected with apparatus for coating 11.Slurry after disperseing in the pulp dispersing device 4 filters in filter 6, is coated with in the slurry input apparatus for coating 11 with right rail.Apparatus for coating 11 can be the coating machine that has drying function.Behind apparatus for coating 11, be provided with coil cradle 14, the material rolling after the coating is got up to change operation usefulness down.Be provided with coating wheel 10 in the porch of apparatus for coating 11.Between pulp dispersing device 4 and filter 6, be provided with the non-conservation tank 5 and second pulp dispersing device; Pulp dispersing device 4 is connected with non-conservation tank 5 through membrane pump; Non-conservation tank 5 is connected with second pulp dispersing device 41, and second pulp dispersing device 41 is connected with filter 6.The effect of non-conservation tank 5 is to make the batching of front and whipping step and follow-up application step keep harmonious.Be provided with second pulp dispersing device 41 the same in non-conservation tank 5 back, the slurry of the processing in the non-conservation tank 5 is further being disperseed, avoiding in this non-conservation tank 5, producing agglomeration with pulp dispersing device 4 structures.The structure of second pulp dispersing device 41 is the same with pulp dispersing device 4.
Described pulp dispersing device 4 is the ultrasonic dispersing appearance; As shown in Figure 2, described ultrasonic dispersing appearance comprises reaction tube 21 and forceps-shaped ultrasonic processor 17, described forceps-shaped ultrasonic processor 17; Comprise transducer assemblies and function fixture 19; Transducer assemblies comprises transducer and horn, and transducer is connected with horn, and a minimum transducer assemblies is connected with function fixture; A minimum forceps-shaped ultrasonic processor 17 is clamped on the reaction tube 21 through function fixture 19.Electrokinetic cell electrode slurry after stirring carries out deep vibrations through ultrasonic wave in reaction tube 21 disperses; The non-uniform phenomenon such as unite that can overcome effectively that the nanoscale fine particle possibly cause can improve the dispersing uniformity of slurry and the gentle flat uniformity of follow-up coating.The ultrasonic dispersing appearance also comprises support 15, slurry inlet 24, and slurry outlet 20, reaction tube 21 are fixed on the workbench of support 15, are lined with supporting seat 16 between reaction tube 21 and the work top.The slurry inlet is arranged on support 15 bottoms, is connected with reaction tube 21 through mashing pump 12.Feeding mouth place at reaction tube 21 is provided with elbow 22, so that be connected with feeding pipe.Reaction tube 21 is provided with discharging opening 20.Can two of clampings or the forceps-shaped ultrasonic processor 17 more than two on the reaction tube 21.Forceps-shaped ultrasonic processor 17 supersonic generator 13 interior with being arranged on support is connected.Reaction tube 21 is arranged on the workbench of support, can encapsulated by bonnet 18 and protecgulum 23.In reaction tube, accepts hyperacoustic all even further peptizaiton through the preliminary battery electrode paste that disperses, the nanoscale ultramicro powder in the slurry effectively is uniformly dispersed, overcome reunion and negative phenomena such as inhomogeneous.Between filter 6 and apparatus for coating 11, be provided with slurry tank 9, be provided with direct insertion ultrasonic dispersing device 7 in the slurry tank 9, carry out last dispersion being about to import the slurry that apparatus for coating is coated with in the slurry tank 9.The actuating arm of direct insertion ultrasonic dispersing device 7 is connected with transmission motor 8.Drive motors 8 drives direct insertion ultrasonic dispersing device and in slurry, moves around.
As shown in Figure 3; Direct insertion ultrasonic dispersing device comprises ultrasonic transducer 29, horn 33 and ultrasonic wave function rod, and described ultrasonic transducer 28 is connected with horn 33; Horn 33 is connected with ultrasonic wave function rod; Be provided with stainless steel outer sleeve 36 at ultrasonic wave function rod overcoat, be provided with recirculated water heat exchange interlayer in the stainless steel outer sleeve 36, stainless steel outer sleeve 36 is provided with cooling water inlet 35 and coolant outlet 34.Stainless steel outer sleeve 36 can avoid metal ion on the ultrasonic wave function rod to the pollution of cell size.In addition, will produce great amount of heat in the use for a long time in the ultrasonic wave function rod, the heat exchange interlayer of setting can effectively be lowered the temperature to ultrasonic wave function rod, improves service life, and guarantees the crudy of slurry.Water, cooling wet goods cooling medium are lowered the temperature.The preferred air that uses is lowered the temperature as cooling medium, can avoid cooling medium to leak out like this, and electrode material is polluted.Ultrasonic wave function rod is for transmitting ultrasonic oscillating column pump.Direct insertion ultrasonic dispersing device is fixed on the locking fixture 32 through locking flange 30, and locking fixture 32 is connected with adjustment piece 27, and adjustment piece 27 and front and back adjustment piece 26 flexibly connect, and adjustment piece 26 in front and back flexibly connects with installation fast 25.Installing fast 25 is installed on the conveying motor 8.Drive motors 8 drives direct insertion ultrasonic dispersing device and in slurry, moves around.
The foregoing description is not to be limitation of the present invention; The those of ordinary skill in relevant technologies field; Under the situation that does not break away from the spirit and scope of the present invention; Can also make various variations and modification, so all technical schemes that are equal to also should belong to category of the present invention, scope of patent protection of the present invention should be limited each claim.
Claims (8)
1. electrokinetic cell electrode slurry decentralized system is coated with the automatic continuous production system; Comprise proportioner, initial agitating device, first pulp dispersing device, filter and apparatus for coating; Proportioner is prepared burden by setting proportioning; Importing initial agitating device then stirs; Initial agitating device is connected the electrode slurry that will tentatively stir to be imported first pulp dispersing device and disperses with first pulp dispersing device, and first pulp dispersing device is connected with filter, and filter is connected with apparatus for coating; It is characterized in that: described first pulp dispersing device comprises reaction tube and forceps-shaped ultrasonic processor, and a minimum forceps-shaped ultrasonic processor is clamped on the reaction tube through function fixture.
2. electrokinetic cell electrode slurry decentralized system as claimed in claim 1 is coated with the automatic continuous production system, it is characterized in that: the pipeline between the described initial agitating device and first pulp dispersing device is provided with the viscosimeter of online detection viscosity.
3. electrokinetic cell electrode slurry decentralized system as claimed in claim 1 is coated with the automatic continuous production system; It is characterized in that: described forceps-shaped ultrasonic processor; Comprise transducer assemblies and function fixture; Transducer assemblies comprises transducer and horn, and transducer is connected with horn, and a minimum transducer assemblies is connected with function fixture.
4. electrokinetic cell electrode slurry decentralized system as claimed in claim 1 is coated with the automatic continuous production system; It is characterized in that: be provided with the non-conservation tank and second pulp dispersing device between described first pulp dispersing device and the filter; First pulp dispersing device is connected with non-conservation tank through membrane pump; Non-conservation tank is connected with second pulp dispersing device, and second pulp dispersing device is connected with filter, and described second pulp dispersing device is identical with the first pulp dispersing device structure.
5. electrokinetic cell electrode slurry decentralized system as claimed in claim 4 is coated with the automatic continuous production system, it is characterized in that: the pipeline between the described non-conservation tank and second pulp dispersing device is provided with the viscosimeter of online detection viscosity.
6. electrokinetic cell electrode slurry decentralized system as claimed in claim 1 is coated with the automatic continuous production system; It is characterized in that: be provided with slurry tank between described filter and the apparatus for coating; Be provided with direct insertion ultrasonic dispersing device in the slurry tank; Direct insertion ultrasonic dispersing device is connected with the transmission motor
7. electrokinetic cell electrode slurry decentralized system as claimed in claim 6 is coated with the automatic continuous production system; It is characterized in that: described direct insertion ultrasonic dispersing device is fixed on the locking fixture through the locking flange; Locking fixture is connected with the adjustment piece; Adjustment piece and front and back adjustment piece flexibly connect, and front and back adjustment piece is movably arranged on the mounting blocks, and mounting blocks is connected with the transmission motor.
8. be coated with the automatic continuous production system like claim 6 or 7 described electrokinetic cell electrode slurry decentralized systems; It is characterized in that: direct insertion ultrasonic dispersing device comprises ultrasonic transducer; Horn and ultrasonic wave function rod; Described ultrasonic transducer is connected with horn, and horn is connected with ultrasonic wave function rod, is provided with stainless steel outer sleeve at ultrasonic wave function rod overcoat; Be provided with recirculated water heat exchange interlayer in the stainless steel outer sleeve, be outside equipped with cooling water inlet and coolant outlet in stainless steel outer sleeve.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412020B (en) * | 2011-11-21 | 2013-07-31 | 广东风华高新科技股份有限公司 | Method for preparing nickel electrode slurry for electronic component |
| CN102569728B (en) * | 2011-12-30 | 2014-03-26 | 万向电动汽车有限公司 | Technology for preparing lithium ion slurry and device |
| CN106896037A (en) * | 2015-12-19 | 2017-06-27 | 西安瑞联新材料股份有限公司 | A kind of capillary viscometer apparatus for automatically measuring of system |
| CN106140025A (en) * | 2016-08-12 | 2016-11-23 | 嘉兴恒威电池有限公司 | Electro-hydraulic automatic reaction induction system |
| CN107732141B (en) * | 2017-09-28 | 2020-11-10 | 东莞市沃泰通新能源有限公司 | Battery slurry coating equipment |
| CN108816136B (en) * | 2018-06-07 | 2021-02-26 | 山东奥冠新能源科技有限公司 | Continuous production device and process for lithium battery slurry |
| CN113161163B (en) * | 2021-05-18 | 2022-12-27 | 南通江海电容器股份有限公司 | Dry method electrode preparation process and device of supercapacitor |
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| CN101533905A (en) * | 2009-04-14 | 2009-09-16 | 天津力神电池股份有限公司 | Coating method and coating system for producing the electrodes of lithium-ion batteries |
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| CN201783432U (en) * | 2010-08-27 | 2011-04-06 | 严卓晟 | Power battery electrode paste dispersing, manufacturing and coating automatic continuous production system |
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| JP4828683B2 (en) * | 2000-07-07 | 2011-11-30 | パナソニック株式会社 | Method and apparatus for manufacturing battery electrode plate |
| JP5003695B2 (en) * | 2009-02-04 | 2012-08-15 | トヨタ自動車株式会社 | Electrode slurry manufacturing method and electrode slurry manufacturing apparatus |
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| CN101533905A (en) * | 2009-04-14 | 2009-09-16 | 天津力神电池股份有限公司 | Coating method and coating system for producing the electrodes of lithium-ion batteries |
| CN101773907A (en) * | 2010-02-05 | 2010-07-14 | 严锦璇 | Forceps-shaped ultrasonic processor and application thereof |
| CN201783432U (en) * | 2010-08-27 | 2011-04-06 | 严卓晟 | Power battery electrode paste dispersing, manufacturing and coating automatic continuous production system |
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