CN107256971A - A kind of Soft Roll ternary electrokinetic cell and preparation method thereof - Google Patents

A kind of Soft Roll ternary electrokinetic cell and preparation method thereof Download PDF

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Publication number
CN107256971A
CN107256971A CN201710368743.8A CN201710368743A CN107256971A CN 107256971 A CN107256971 A CN 107256971A CN 201710368743 A CN201710368743 A CN 201710368743A CN 107256971 A CN107256971 A CN 107256971A
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negative
battery
pole piece
positive
coating area
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陈晓
母浩
郑胜涛
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Ma'anshan Vigor Electric Technology Co Ltd
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Ma'anshan Vigor Electric Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • H01M4/623—Binders being polymers fluorinated polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a kind of Soft Roll ternary electrokinetic cell and preparation method thereof, belong to battery and preparation method thereof technical field.A kind of Soft Roll ternary electrokinetic cell of the present invention, including anode pole piece, cathode pole piece, barrier film, electrolyte and battery container, wherein, anode pole piece, cathode pole piece and barrier film formation barrier film/negative pole/barrier film/positive pole laminated structure battery, described anode pole piece includes plus plate current-collecting body, the plus plate current-collecting body includes the transition region between the first coating area, the second coating area and the first coating area and the second coating area, and the positive and negative of first coating area and the second coating area is equipped with positive electrode material layer.The security performance of lithium ion battery can be significantly improved, so as to meet the use requirement of new-energy automobile on the basis of Large Copacity is ensured using technical scheme.

Description

A kind of Soft Roll ternary electrokinetic cell and preparation method thereof
Technical field
The invention belongs to battery and preparation method thereof technical field, more specifically to a kind of Soft Roll ternary power electric Pond and preparation method thereof.
Background technology
Lithium ion battery has been widely used for various fields as the environmental protection energy, is distinguished with positive electrode, lithium from Sub- battery is divided into cobalt acid lithium battery, lithium manganate battery, ternary material battery and ferric phosphate lithium cell etc..Wherein, ternary material electricity Pond is due to the characteristic such as voltage platform height, energy density height, high, the electrochemically stable, good cycle of tap density, in lifting The course continuation mileage of new-energy automobile, mitigates the worried aspect of user's course continuation mileage and has a clear superiority, while also having discharge voltage Height, power output is than larger, low temperature performance well, the advantages of being suitable for round-the-clock temperature, therefore just gradually by auto producer Business and the favor of user.
With the raising of people's use demand, the appearance to lithium ion battery such as electric automobile, hybrid vehicle, low-speed vehicle Amount requires more and more higher, but the increase of battery core capacity, and the requirement to its security is also gradually stepped up.But existing ternary battery Security performance is relatively poor, and short circuit blast occurs during high current charge-discharge and in pin prick test, easily for especially battery Phenomenon, is typically to improve its security performance using the method for reduction battery capacity in the prior art, so that people can not be met To the use requirement of electric automobile, hybrid vehicle, low-speed vehicle etc..Such as battery reaches certain temperature under the conditions of overcharging, Electrolyte can decompose and oxidation reaction, produce substantial amounts of heat, if heat is not suppressed timely, the accumulation of heat Temperature can be caused further to raise.When temperature reaches to a certain degree, battery can be on fire from explosion.Major part battery is overcharged at present Test shows that battery safe temperature during overcharging is about 110 DEG C or so.When battery temperature meets or exceeds 110 DEG C, electricity Vigorous reaction can occur for pond electrolyte inside and cathode material, occur thermal runaway, and temperature steeply rises, ultimately resulted in hot It is fried.Therefore, how on the basis of ensureing that lithium ion battery has Large Copacity, it is most important to improve its security performance, is also existing There is new-energy automobile to be badly in need of the technical barrier solved in being produced with lithium ion battery.
Through retrieval, the patent report on improving lithium ion battery safety performance is existing related open.Such as, Chinese patent 201521110006.0 disclosing a kind of winding type soft package lithium ion battery, the battery of this application case includes positive plate and negative pole Piece, positive plate and negative plate stack bending and are wound into battery core, the initiating terminal of positive plate and negative plate to first time bending place The positive pole head end Kong Bo areas and negative pole head end Kong Bo areas of active material are not coated with respectively, and negative pole head end sky paper tinsel section length ratio is just The empty paper tinsel head of district of pole head end, the part grown is negative pole petiolarea, and the tail end of positive plate and the tail end of negative plate are respectively arranged with not There are the positive extremity Kong Bo areas and negative end Kong Bo areas of coating active material, the initiating terminal in positive extremity Kong Bo areas and end two The line at end intersects with negative pole head end Kong Bo areas, and negative pole petiolarea is at positive extremity Kong Bo areas and positive extremity Kong Bo areas two ends Enclosing for line is set in scope.Using the battery structure of this application case enable pierce through test through negative pole petiolarea when also cross Positive extremity Kong Bo areas, allow the heat produced when positive plate and short-circuit negative plate quickly to be discharged, carry to a certain extent The high security performance of battery；But it is only capable of lifting security performance of the battery in acupuncture, and other performances are not improved then, and Also battery energy density is reduced using the scheme of this application case.
And for example, Chinese patent 201610458567.2 discloses a kind of battery pole piece, and the battery pole piece includes anode collection Body and positive electrode active materials, a side surface of plus plate current-collecting body are provided with coating area, phase at least two spaced positive poles Positive pole Nei Kongbo areas are provided between coating area in adjacent two positive poles, another side surface of plus plate current-collecting body is provided with least two The outer coating area of spaced positive pole, two neighboring positive pole is provided with positive pole outer space paper tinsel area, positive-active material between outer coating area Material is coated in positive pole on coating area and the outer coating area of positive pole.This application case is by being arranged at intervals some coating areas, and adjacent Kong Bo areas are set between coating area, and Shi Gaikongbo areas form cushion space, are ensureing that battery has a case that higher energy density Stress produced by lower effectively buffering pole piece material volumetric expansion, so as to prevent pole piece to be broken；But this application case is mainly used in protecting The electrical property of battery is demonstrate,proved, and security performance when being flowed through to battery battery core internal short-circuit or high current can not then ensure.
The content of the invention
1. the invention technical problem to be solved
An object of the present invention is to overcome the security performance of existing lithium ion battery relatively poor, in large current density The short-circuit deficiency exploded easily occurs in electric process or in lancing test, and there is provided a kind of Soft Roll ternary electrokinetic cell.Using this hair Bright technical scheme can significantly improve the security performance of lithium ion battery, so as to meet the use requirement of new-energy automobile.
Second object of the present invention is the security performance in order to overcome use existing method to prepare gained lithium ion battery Relatively poor deficiency, and there is provided a kind of preparation method of Soft Roll ternary electrokinetic cell, institute is prepared using the method for the present invention The security performance for obtaining electrokinetic cell is greatly enhanced.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
First, the present invention a kind of Soft Roll ternary electrokinetic cell, including anode pole piece, cathode pole piece, barrier film, electrolyte and Battery container, wherein, anode pole piece, cathode pole piece and barrier film formation barrier film/negative pole/barrier film/positive pole laminated structure battery, Described anode pole piece includes plus plate current-collecting body, and the plus plate current-collecting body includes the first coating area, the second coating area and the first painting The transition region between area and the second coating area is covered, the positive and negative of first coating area and the second coating area is equipped with positive electrode Layer.
Further, it is discontinuous connection between the transition region and the first coating area and the second coating area, it is adjacent Spacing distance between linkage section is 2-3mm, and the positive and negative of the transition region is uniformly coated with positive electrode material layer.
Further, first coating area, the second coating area and transition region are laterally or longitudinally equal along anode pole piece Three regions of even distribution；The cathode pole piece includes negative current collector, and the positive and negative of negative current collector is uniformly coated with negative pole Material layer.
Further, continuously it is connected between the transition region and the first coating area and the second coating area, and transition region Positive and negative be uniformly coated with Al2O3Coating.
Further, when the first coating area, the second coating area and transition region are laterally sequentially distributed along anode pole piece, mistake The width for crossing area is the 1/4 of anode pole piece overall width；When the first coating area, the second coating area and transition region are longitudinal along anode pole piece When being sequentially distributed, the width of transition region is the 1/5 of anode pole piece overall length.
Further, described cathode pole piece includes negative current collector, and the negative current collector includes the 3rd coating area, the Four coating areas and Kong Bo areas, the position in Kong Bo areas and size are corresponding with transition region, and the 3rd coating area and the 4th coating area Positive and negative is uniformly coated with negative electrode material layer.
Further, the plus plate current-collecting body uses thickness for 12~25 μm of aluminium foil, the negative current collector use Thickness is 10~15 μm of copper foil；Described barrier film use thickness for 15 μm~25 μm polypropylene+ceramic diaphragm or polyethylene+ Ceramic diaphragm or polypropylene+polyethylene+polypropylene trilamellar membrane or nonwoven cloth diaphragm, described electrolyte are lithium hexafluoro phosphate, carbon One or more of mixtures in sour methyl ethyl ester, ethylene carbonate, dimethyl carbonate, diethyl carbonate and the ethyl ester of carbonic acid third, Described battery container is formed by laminated aluminum film.
Further, described positive electrode material layer is made up of positive active material, binding agent and conductive agent, wherein positive pole Active material uses cobalt nickel lithium manganate ternary material, and binding agent uses Kynoar, and conductive agent uses conductive black, superconduction One or more in carbon, electrically conductive graphite, crystalline flake graphite and CNT；Described cathode pole piece is by negative current collector and coating Constituted in the negative electrode material layer of negative current collector tow sides, the negative electrode material layer is by negative active core-shell material, conductive agent, thickener With binding agent composition, wherein negative active core-shell material is used in Delanium, native graphite, carbonaceous mesophase spherules and hard carbon material One or more, conductive agent uses the one or more in conductive carbon black, superconduction carbon, electrically conductive graphite；Thickener uses carboxymethyl Sodium cellulosate, binding agent uses butadiene-styrene rubber.
Further, described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 91% ~96%, superconduction carbon 1%~4%, electrically conductive graphite 1%~3%, CNT 0%~2%, Kynoar 2%~5%；Institute The negative electrode material layer stated is made up of the component of following mass percent：Negative active core-shell material 91%~95%, conductive black 0%~ 2%th, electrically conductive graphite 0%~2%, butadiene-styrene rubber 2%~4%, sodium carboxymethylcellulose 1%~2%.
Third, a kind of preparation method of Soft Roll ternary electrokinetic cell of the present invention, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 2~3 hours under conditions of having circulating water, then add well mixed Nickle cobalt lithium manganate and conductive agent mixture, add material stirring 3~6 hours, obtained slurry through sieving produce positive pole material Slurry material, the solid content of positive electrode slurry is 60%~75%；Before slurry preparation, nickle cobalt lithium manganate is placed in 120~150 Toasted 12~24 hours at DEG C, conductive agent is placed at 120~150 DEG C and toasted 4~6 hours；
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 1~3 hour in water, be subsequently added conductive agent and stir 2~4 hours, slurry crosses colloid mill so that conductive agent is divided completely Dissipate, add negative active core-shell material and stir 2~5 hours, be subsequently added bonding agent and stir 2~3 hours, obtained slurry is through sieving Negative material slurry is obtained, the solid content of negative material slurry is 38~50%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is evenly applied to the first coating area of plus plate current-collecting body and the tow sides of the second coating area, And reserved positive pole ear position, positive pole coated face density is 25~38mg/cm2, it is then equal in the positive and negative of transition region as needed Even coating positive electrode slurry or Al2O3Coating, is placed in 95~120 DEG C of baking boxs after the completion of positive pole coating and is toasted；By negative pole Material paste is evenly applied to the tow sides of negative current collector coating area, and reserved negative lug position, negative pole coated face density For 13.6~22mg/cm2, it is placed in 70~110 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.0~3.8g/cm3, negative pole Compacted density is 1.2~1.6g/cm3, the good positive/negative plate of roll-in is then carried out according to the manufacturing specification of battery pole piece by laser Cutting, accurately reserves both positive and negative polarity lug position during laser cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece toasts 10 at a temperature of 100~130 DEG C ~12 hours, cathode pole piece was toasted 10~12 hours in the case where temperature is 80~100 DEG C, in baking process every 2~4 hours even Continue extraction argon gas 3~5 times, baking is carried out continuously extraction argon gas 3~5 times again after terminating, and pole piece is then cooled down under vacuum conditions To less than 45 DEG C, take out pole piece and carry out subsequent handling；
Step 5: the preparation of battery
Anode pole piece after baking, cathode pole piece and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole lamination is formed Formula structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear and negative lug are respectively welded according to battery design requirement and reserved in both positive and negative polarity pole piece on collector, Then battery core is fitted into made battery container, temperature be 150~250 DEG C, pressure be 0.2~0.5Mpa, time be 5~ Under the conditions of 10 seconds battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core is toasted under 80~120 DEG C of vacuum states 20~24 hours, continuously taken out every 4~6 hours in baking process Put argon gas 2~4 times, baking is carried out continuously 3~5 argon gas of extraction again after terminating, pole piece is then cooled down under vacuum conditions to 45 Below DEG C, take out battery core and carry out fluid injection process, then seal another side of battery, then shelve battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then at 4.2v Constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
3. beneficial effect
The technical scheme provided using the present invention, compared with prior art, with following remarkable result：
(1) a kind of Soft Roll ternary electrokinetic cell of the invention, by optimizing design to battery pole piece structure, so as to The security performance of battery is enough significantly improved, the use requirement of existing green electric power supply automobile is met.
(2) a kind of Soft Roll ternary electrokinetic cell of the invention, the transition region of its anode pole piece and the first coating area and second It is that discontinuous is connected between coating area, and the positive and negative of transition region, the first coating area and the second coating area is uniformly coated with just Pole material layer, so as to ensure that battery can carry out normal charge and discharge process under normal circumstances, and when battery bear extraneous acupuncture, Battery core short circuit occurred inside when short circuit, extruding, impact etc., transcient short circuit time electric current is larger when reaching certain numerical value, makes anode pole piece From transition region fracture, so that battery compartment fails, the security performance of lithium ion battery is substantially increased.
(3) a kind of Soft Roll ternary electrokinetic cell of the invention, the transition region of its anode pole piece and the first coating area and second Continuous between coating area to be connected, the positive and negative of transition region is uniformly coated with Al2O3Coating, at the same cathode pole piece be provided with just The corresponding Kong Bo areas of pole pole piece transition region, therefore when battery is in extruding or acupuncture or impact, positive pole transition region aluminium foil Occur short circuit with negative pole Kong Bo areas copper foil, the capacity of inside battery is distributed rapidly, and the alundum (Al2O3) of positive pole coating also can Reduction internal temperature of battery is played, the effect of burning is prevented, so as to significantly improve the security performance of battery.
(4) a kind of Soft Roll ternary electrokinetic cell of the invention, by anode pole piece transition region and the first coating area, second The spacing of adjacent linkage section or the size of transition region optimize design between coating area, so that battery can either be effectively ensured Normal usage energy, can improve its security performance again, prevent from exploding during internal short-circuit of battery.
(5) a kind of Soft Roll ternary electrokinetic cell of the invention, can also by the setting in positive pole transition region and negative pole Kong Bo areas Cushion space is enough formed, pole piece material volumetric expansion can be effectively buffered in the case where ensureing that battery has higher energy density Produced stress, so as to improve the electrical property of battery.The setting in the positive pole transition region and negative pole Kong Bo areas can also be formed Heat-dissipating space, substantially increases the heat-sinking capability of battery, is conducive to preventing the generation of internal short-circuit of battery phenomenon, so that further Improve the electrical property of battery.
(6) preparation method of a kind of Soft Roll ternary electrokinetic cell of the invention, gained ternary power is prepared using this method Battery has excellent electrical property and security performance simultaneously, disclosure satisfy that Large Copacity and safety of the current people to various electric cars etc. Requirement.
(7) preparation method of a kind of Soft Roll ternary electrokinetic cell of the invention, by positive electrode and negative material Component, proportioning and other technological parameters optimize design, have excellent discharge and recharge so as to which gained battery is effectively ensured Performance and performance.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment 1-3 ternary electrokinetic cell；
Fig. 2 is the structural representation of embodiment 1-3 anode pole piece；
Fig. 3 is the structural representation of the ternary electrokinetic cell of embodiment 4 and 5；
Fig. 4 is the structural representation of the anode pole piece of embodiment 4 and 5；
Fig. 5 is the structural representation of the anode pole piece of embodiment 6；
Fig. 6 is the structural representation of the cathode pole piece of embodiment 6；
Fig. 7 is the structural representation of the anode pole piece of embodiment 8.
Label declaration in schematic diagram：
1st, cathode pole piece；101st, negative lug；102nd, the 3rd coating area；103rd, the 4th coating area；104th, Kong Bo areas；2nd, just Pole pole piece；201st, positive pole ear；202nd, the first coating area；203rd, the second coating area；204th, transition region.
Embodiment
To further appreciate that present disclosure, in conjunction with the drawings and specific embodiments, the present invention is described in detail.Value It must illustrate, positive electrode material layer is made up of positive active material, binding agent and conductive agent in the present invention, wherein by quality percentage Than meter, positive active material accounts for 92%~95%, and binding agent accounts for 2%~4%, and conductive agent accounts for 2%~8%.It is furthermore preferred that conductive Agent is made up of the component of following mass percent：Superconduction carbon 1%~3%, electrically conductive graphite 1%~3%, CNT 0%~ 2%.Negative electrode material layer is made up of negative active core-shell material, conductive agent, thickener and binding agent, by mass percentage, and negative pole is lived Property material accounts for 92%~95%, and conductive agent accounts for 1%~5%, and thickener accounts for 1%~2%, and binding agent accounts for 2%~4%, more preferably , conductive agent is made up of the component of following mass percent：Conductive black 1%~3%, electrically conductive graphite 0%~2%.Described Electrolyte is in lithium hexafluoro phosphate, methyl ethyl carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate and the ethyl ester of carbonic acid third One or more of mixtures, because length is limited, section Example is only enumerated below and is illustrated.
Embodiment 1
As shown in figure 1, a kind of Soft Roll ternary electrokinetic cell of the present embodiment, including anode pole piece 2, cathode pole piece 1, every Film, electrolyte and battery container, wherein, anode pole piece 2, cathode pole piece 1 and barrier film formation barrier film/negative pole/barrier film/positive pole lamination Formula structure battery core.Above-mentioned barrier film uses polyethylene+ceramic coating membrane, and the membrane thicknesses are 15 μm；The electrolyte is six Lithium fluophosphate, described battery container is formed by laminated aluminum film.
Above-mentioned battery positive pole piece 2 includes plus plate current-collecting body, and plus plate current-collecting body uses thickness for 25 μm of aluminium foil, such as Fig. 2 Shown, the plus plate current-collecting body includes the first coating area 202, the second coating area 203 and the first coating area 202 and the second coating area Between 203 transition region 204 (the first coating area 202, the second coating area 203 and transition region 204 are laterally sequentially distributed along battery, Anode pole piece is divided into three regions of cross direction profiles by transition region 204).In the present embodiment the first coating area 202 with Second coating area 203 is symmetrical arranged on transition region 204, the coating area 202 of transition region 204 and first and the second coating area 203 Between be discontinuous connection, and spacing distance between adjacent linkage section is 2mm.Above-mentioned first coating area 202, second is coated The positive and negative of area 203 and transition region 204 is equipped with positive electrode material layer, and the thickness of positive electrode material layer is 110 μm.The present embodiment In, described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 92%, superconduction carbon 3%, conductive stone Ink 1%, CNT 1%, Kynoar 3%.
The cathode pole piece 1 of the present embodiment includes negative current collector, and negative current collector uses thickness for 10 μm of copper foil, and this is born The positive and negative of pole collector is uniformly coated with negative electrode material layer, and the thickness of negative electrode material layer is 125 μm, and the negative electrode material layer is by such as The component composition of lower mass percent：Negative active core-shell material 93%, conductive black 2%, thickener 2%, binding agent accounts for 3%.
Security performance for existing ternary electrokinetic cell is relatively poor, and it is ensured typically by battery capacity is sacrificed Security performance, so as to be difficult to the deficiency for meeting the use requirement of green energy resource automobile, the present embodiment passes through to battery positive pole piece Structure optimize design, i.e., anode pole piece is divided into by three regions by transition region 204, and transition region 204 and coating It is (interrupted) connection of discontinuous between area, so as on the premise of Large Copacity is ensured, significantly improve the peace of lithium ion battery Full performance.By said structure design, lithium ion battery can carry out normal charge and discharge process under normal circumstances, and work as battery Battery core short circuit occurred inside when extraneous acupuncture, short circuit, extruding, impact etc. is born, transcient short circuit time electric current is larger to reach certain numerical value When (reach 12A/mm2When), anode pole piece is broken from transition region 204, so that battery compartment fails, substantially increase electricity The security performance in pond, and do not interfere with it simultaneously and normally use.
In addition, the size of space of above-mentioned transition region 204 linkage section adjacent with coating area junction is for improving cell safety Performance, and ensure it normally using most important.When above-mentioned spacing distance is too small, battery is bearing extraneous acupuncture, short circuit, squeezed Pressure, impact etc. and occur to be difficult to during battery core internal short-circuit at transition region 204 be broken, so as to cause battery safety not obtain To effectively improving；And when above-mentioned spacing distance is excessive, then battery may be broken under low current effect, so as to influence It is normally used.Inventor is entered by many experiments to the size of space of the linkage section adjacent with coating area junction of transition region 204 Row optimization design, so as to both can guarantee that the normal usage energy of battery, can improve its security performance, prevent inside battery again Exploded when short-circuit.
Meanwhile, what inventor was also prepared by many experiments to the component of anode and negative material, with when battery Concrete technology optimizes design, so as to further ensure the safe application performance and electrical property of battery simultaneously, it is ensured that it has There is Large Copacity and excellent security performance, disclosure satisfy that the use demand of people.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 3 hours under conditions of having circulating water, then add what is be well mixed The mixture of nickle cobalt lithium manganate and conductive agent, adds material stirring 3 hours, obtained slurry obtains positive electrode through sieving 2 times Slurry, the solid content of the positive electrode slurry is 60%.Before slurry preparation, nickle cobalt lithium manganate is placed in 150 DEG C of bakings 12 small When, conductive agent is placed in 120 DEG C and toasted 6 hours.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 3 hours in water, be subsequently added conductive agent and stir 2 hours, so that conductive agent is completely dispersed, add negative electrode active material Material stirring 2 hours, is subsequently added bonding agent and stirs 3 hours, obtained slurry produces negative material slurry through sieving, the negative pole The solid content of material paste is 44%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is evenly applied to the positive and negative of the first coating area 202, the second coating area 203 and transition region 204 Two sides, and reserved positive pole ear 201, positive pole coated face density is 35mg/cm2, 120 DEG C of baking boxs are placed in after the completion of positive pole coating It is interior to be toasted；Negative material slurry is evenly applied to the tow sides of negative current collector, and reserved negative lug 101, Negative pole coated face density is 20mg/cm2, it is placed in 87 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.5g/cm3, negative pole compacting Density is 1.4g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Connecting portion and both positive and negative polarity lug position of the accurate reserved anode pole piece transition region 204 with coating area during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece is toasted 12 hours at a temperature of 100 DEG C, Cathode pole piece is to toast 12 hours at 100 DEG C in temperature, continuous extraction argon gas 3 times every 4 hours in baking process, and baking terminates It is carried out continuously extraction argon gas again afterwards 3 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carries out follow-up work under vacuum conditions Sequence；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in both positive and negative polarity pole piece using ultrasonic bond according to battery design On reserved collector, then battery core is fitted into made battery container, temperature be 150 DEG C, pressure be 0.4Mpa, time to be Under the conditions of 5 seconds battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 80 DEG C of vacuum states, continuous extraction argon gas 2 times, baking every 6 hours in baking process 5 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 2
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 1 of its structure, its difference is essentially consisted in：Such as Shown in Fig. 1, Fig. 2, battery positive pole piece is divided into three sections of laterally uniform regions, the transition region by the transition region 204 204 width is identical with the first coating area 202, the width of the second coating area 203, and the coating area 202 of transition region 204 and first, Spacing between the adjacent linkage section in the junction of two coating area 203 is 3mm.The barrier film uses thickness for 15 μm of polypropylene+pottery Porcelain coats barrier film；The electrolyte is the mixture of lithium hexafluoro phosphate and methyl ethyl carbonate, and plus plate current-collecting body uses thickness for 12 μ M aluminium foil, the thickness of positive electrode material layer is 120 μm；Negative current collector uses thickness for 10 μm of copper foil, negative electrode material layer Thickness is 130 μm.
In the present embodiment, described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 92%, Superconduction carbon 3%, electrically conductive graphite 1%, Kynoar 4%.The negative electrode material layer is made up of the component of following mass percent： Delanium 93.8%, conductive black 2%, carboxymethyl cellulose 1.2%, butadiene-styrene rubber 3%.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 2.5 hours under conditions of having circulating water, then add well mixed Nickle cobalt lithium manganate and conductive agent mixture, add material stirring 3 hours, obtained slurry through sieving 2 times, that is, obtain positive pole material Slurry material, the solid content of the positive electrode slurry is 60%.Before slurry preparation, LiFePO4 conductive agent is both needed in 120 DEG C of bakings Roasting 12 hours, conductive agent need to be toasted 5 hours at 120 DEG C.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 1 hour in water, be subsequently added conductive agent and stir 2.5 hours, added negative active core-shell material and stir 2 hours, be subsequently added Bonding agent is stirred 3 hours, and obtained slurry obtains negative material slurry, the solid content of the negative material slurry through sieving 1 time For 38%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is evenly applied to the positive and negative of the first coating area 202, the second coating area 203 and transition region 204 Two sides, and reserved positive pole ear 201, positive pole coated face density is 25mg/cm2, 95 DEG C of baking boxs are placed in after the completion of positive pole coating It is interior to be toasted；Negative material slurry is evenly applied to the tow sides of negative current collector, and reserved negative lug 101, Negative pole coated face density is 13.6mg/cm2, it is placed in 70 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.0g/cm3, negative pole compacting Density is 1.2g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Connecting portion and both positive and negative polarity lug position of the accurate reserved anode pole piece transition region 204 with coating area during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece is toasted 12 hours at a temperature of 100 DEG C, Cathode pole piece is to toast 10 hours at 80 DEG C in temperature, continuous extraction argon gas 3 times every 2 hours in baking process, and baking terminates It is carried out continuously extraction argon gas again afterwards 3 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carries out follow-up work under vacuum conditions Sequence；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 150 DEG C, pressure be 0.2Mpa, time be 5 seconds bars Under part battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 80 DEG C of vacuum states, continuous extraction argon gas 2 times, baking every 4 hours in baking process 3 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 3
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 1 of its structure, its difference is essentially consisted in：Institute State barrier film and use thickness for 25 μm of polypropylene+polyethylene+polypropylene trilamellar membrane；The electrolyte is lithium hexafluoro phosphate, positive pole Collector uses thickness for 25 μm of aluminium foil；The spacing of adjacent linkage section is 2.5mm between the transition region 204 and coating area.
The thickness of the positive electrode material layer of the present embodiment be 110 μm, the positive electrode material layer by following mass percent component Composition：Nickle cobalt lithium manganate 95%, superconduction carbon 1%, electrically conductive graphite 1%, Kynoar 3%.The negative current collector is using thick The copper foil for 15 μm is spent, the thickness of negative current collector surface negative electrode material layer is 123 μm, and the negative electrode material layer is by following quality The component composition of percentage：Native graphite 95%, conductive black 1%, butadiene-styrene rubber 2%, sodium carboxymethylcellulose 2%.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 3 hours under conditions of having circulating water, then add what is be well mixed The mixture of nickle cobalt lithium manganate and conductive agent, adds material stirring 4 hours, obtained slurry obtains positive electrode through sieving 1 time Slurry, the solid content of the positive electrode slurry is 68%.Before slurry preparation, LiFePO4 conductive agent is both needed in 135 DEG C of bakings 22 hours, conductive agent need to be toasted 4 hours at 140 DEG C.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 2 hours in water, be subsequently added conductive agent and stir 3 hours, so that conductive agent is completely dispersed, add negative electrode active material Material stirring 3.5 hours, is subsequently added bonding agent and stirs 2 hours, obtained slurry produces negative material slurry through sieving, this is born The solid content of pole material paste is 42%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is evenly applied to the tow sides of plus plate current-collecting body, and reserved positive pole ear 201, positive pole Coated face density is 28mg/cm2, it is placed in 98 DEG C of baking boxs and is toasted after the completion of positive pole coating；Negative material slurry is uniform The tow sides of negative current collector, and reserved negative lug 101 are coated on, negative pole coated face density is 16.8mg mg/cm2, It is placed in 108 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.3g/cm3, negative pole compacting Density is 1.4g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Connecting portion and both positive and negative polarity lug position of the accurate reserved anode pole piece transition region 204 with coating area during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece is toasted 11 hours at a temperature of 105 DEG C, Cathode pole piece is to toast 12 hours at 100 DEG C in temperature, continuous extraction argon gas 4 times every 3 hours in baking process, and baking terminates It is carried out continuously extraction argon gas again afterwards 4 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carries out follow-up work under vacuum conditions Sequence；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 175 DEG C, pressure be 0.4Mpa, time be 10 seconds bars Under part battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 95 DEG C of vacuum states, continuous extraction argon gas 4 times, baking every 5 hours in baking process 5 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 4
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 1 of its structure, its difference is essentially consisted in：Such as Shown in Fig. 3, Fig. 4, battery positive pole piece is divided into three regions (i.e. first of genesis analysis by transition region 204 in the present embodiment Coating area 202, the coating area 203 of transition region 204 and second are longitudinally sequentially distributed along battery positive pole piece), the barrier film is using thick Polyethylene+ceramic diaphragm for 20 μm is spent, the electrolyte is ethylene carbonate, and plus plate current-collecting body uses thickness for 22 μm Aluminium foil, the spacing of adjacent linkage section is 2mm between the transition region 204 and coating area.
The thickness of the positive electrode material layer of the present embodiment be 113 μm, the positive electrode material layer by following mass percent component Composition：Nickle cobalt lithium manganate 94%, superconduction carbon 1%, electrically conductive graphite 1%, CNT 2%, Kynoar 2%.The negative pole Collector uses thickness for 15 μm of copper foil, and the thickness of negative current collector surface negative electrode material layer is 130 μm, the negative electrode material layer It is made up of the component of following mass percent：Native graphite 92%, conductive black 3%, electrically conductive graphite 2%, butadiene-styrene rubber 2%, Sodium carboxymethylcellulose 1%.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 2 hours under conditions of having circulating water, then add what is be well mixed The mixture of nickle cobalt lithium manganate and conductive agent, adds material stirring 3.5 hours, obtained slurry obtains positive pole material through sieving 2 times Slurry material, the solid content of the positive electrode slurry is 75%.Before slurry preparation, LiFePO4 conductive agent is both needed in 150 DEG C of bakings Roasting 24 hours, conductive agent need to be toasted 6 hours at 145 DEG C.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 3 hours in water, be subsequently added conductive agent and stir 4 hours, so that conductive agent is completely dispersed, add negative electrode active material Material stirring 5 hours, is subsequently added bonding agent and stirs 2.5 hours, obtained slurry produces negative material slurry through sieving, this is born The solid content of pole material paste is 50%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is evenly applied to the tow sides of plus plate current-collecting body, and reserved positive pole ear 201, positive pole Coated face density is 38mg/cm2, it is placed in 120 DEG C of baking boxs and is toasted after the completion of positive pole coating；Negative material slurry is uniform The tow sides of negative current collector, and reserved negative lug 101 are coated on, negative pole coated face density is 22mg mg/cm2, bear It is placed in 110 DEG C of baking boxs and is toasted after the completion of the coating of pole；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.8g/cm3, negative pole compacting Density is 1.6g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Connecting portion and both positive and negative polarity lug position of the accurate reserved anode pole piece transition region 204 with coating area during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece is toasted 10 hours at a temperature of 130 DEG C, Cathode pole piece is to toast 11 hours at 95 DEG C in temperature, continuous extraction argon gas 5 times every 4 hours in baking process, and baking terminates It is carried out continuously extraction argon gas again afterwards 4 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carries out follow-up work under vacuum conditions Sequence；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 250 DEG C, pressure be 0.3Mpa, time be 8 seconds bars Under part battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 120 DEG C of vacuum states, continuous extraction argon gas 3 times, baking every 6 hours in baking process 4 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 5
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 4 of its structure, its difference is essentially consisted in：Institute State barrier film and use thickness for 23 μm of nonwoven cloth diaphragm, the electrolyte is dimethyl carbonate, plus plate current-collecting body use thickness for 20 μm of aluminium foil, the spacing of adjacent linkage section is 2.5mm between the transition region 204 and coating area.
The positive electrode material layer of the present embodiment is made up of the component of following mass percent：Nickle cobalt lithium manganate 93%, superconduction carbon 2%th, electrically conductive graphite 2%, CNT 1%, Kynoar 2%.The negative current collector uses thickness for 15 μm of copper foil, The thickness of negative current collector surface negative electrode material layer is 120 μm, and the negative electrode material layer is made up of the component of following mass percent： Native graphite 93%, conductive black 1%, electrically conductive graphite 1%, butadiene-styrene rubber 4%, sodium carboxymethylcellulose 1%.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 2.7 hours under conditions of having circulating water, then add well mixed Nickle cobalt lithium manganate and conductive agent mixture, add material stirring 6 hours, obtained slurry through sieving produce positive electrode starch Material, the solid content of the positive electrode slurry is 72%.Before slurry preparation, LiFePO4 conductive agent is both needed to toast 18 at 145 DEG C Hour, conductive agent need to be toasted 5.5 hours at 150 DEG C.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 2.5 hours in water, be subsequently added conductive agent and stir 2 hours, so that conductive agent is completely dispersed, add negative electrode active Material is stirred 4.5 hours, is subsequently added bonding agent and is stirred 3 hours, and obtained slurry obtains negative material slurry through sieving 2 times Material, the solid content of the negative material slurry is 46%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is evenly applied to the tow sides of plus plate current-collecting body, and reserved positive pole ear 201, positive pole Coated face density is 36mg/cm2, it is placed in 110 DEG C of baking boxs and is toasted after the completion of positive pole coating；Negative material slurry is uniform The tow sides of negative current collector, and reserved negative lug 101 are coated on, negative pole coated face density is 20mg mg/cm2, bear It is placed in 90 DEG C of baking boxs and is toasted after the completion of the coating of pole；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.5g/cm3, negative pole compacting Density is 1.4g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Connecting portion and both positive and negative polarity lug position of the accurate reserved anode pole piece transition region 204 with coating area during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, it is small that anode pole piece toasts 10.5 at a temperature of 122 DEG C When, cathode pole piece is to toast 10.5 hours at 98 DEG C in temperature, continuous extraction argon gas 3 times every 3.5 hours, baking in baking process Extraction argon gas is carried out continuously again 4 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carried out under vacuum conditions after roasting end Subsequent handling；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 225 DEG C, pressure be 0.5Mpa, time be 7 seconds bars Under part battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 105 DEG C of vacuum states, continuous extraction argon gas 2 times, baking every 6 hours in baking process 3 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 6
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 1 of its structure, its difference is essentially consisted in：Such as Shown in Fig. 5, continuously it is connected between transition region 204 and the first coating area 202 and the second coating area 203 in the present embodiment, and mistake The positive and negative for crossing area 204 is uniformly coated with Al2O3Coating, includes along horizontal stroke as shown in fig. 6, the cathode pole piece of the present embodiment is also corresponded to To the 3rd coating area 102 of distribution, the coating area 103 of Kong Bo areas 104 and the 4th, the position in Kong Bo areas 104 and size and transition region 204 is corresponding, and the positive and negative of the 3rd coating area 102 and the 4th coating area 103 is uniformly coated with negative electrode material layer.The present embodiment The width of middle transition region 204 is the 1/4 of the overall width of anode pole piece 2.The barrier film uses thickness for 20 μm of nonwoven cloth diaphragm；Institute Electrolyte is stated for the ethyl ester of carbonic acid third, plus plate current-collecting body uses thickness for 22 μm of aluminium foil.
Optimized in the present embodiment by aligning the structure of cathode pole piece, i.e., by anode pole piece transition region 204 and negative The setting in pole pole piece Kong Bo areas 104, so as to ensure battery in extruding or acupuncture or impact, positive pole transition region aluminium foil is with bearing Short circuit occurs for Ji Kongbo areas copper foil, and the capacity of inside battery is distributed rapidly, and the alundum (Al2O3) of positive pole coating can play drop Low internal temperature of battery, prevents the effect of burning, so as to significantly improve the security performance of battery.Pass through positive pole transition region 204 And the setting in negative pole Kong Bo areas 104 can also form cushion space, the energy in the case where ensureing that battery has higher energy density Stress produced by enough effectively buffering pole piece material volumetric expansions, so as to improve the electrical property of battery.Simultaneously positive pole transition region and The setting in negative pole Kong Bo areas can also form heat-dissipating space, substantially increase the heat-sinking capability of battery, be conducive to preventing in battery The generation of portion's short circuit phenomenon, so as to further increase the electrical property of battery.
In addition, the width of anode pole piece transition region 204 is most important in the present embodiment, inventor is by many experiments to mistake The width for crossing area 204 optimizes design discovery, can when the width of transition region 204 is the 1/4 of the overall width of anode pole piece 2 The best fit of battery safety and normal usage energy (such as electric conductivity) is effectively realized, but when the width is anode pole piece During the 1/5-1/4 of 2 overall widths, requirement also disclosure satisfy that.
Described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 93%, superconduction carbon 1%, Electrically conductive graphite 3%, CNT 1%, Kynoar 2%.The negative current collector uses thickness for 13 μm of copper foil, negative pole The thickness of collection liquid surface negative electrode material layer is that the negative electrode material layer is made up of the component of following mass percent：Hard carbon material 93%th, conductive black 3%, electrically conductive graphite 1%, butadiene-styrene rubber 2%, sodium carboxymethylcellulose 1%.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 2.2 hours under conditions of having circulating water, then add well mixed Nickle cobalt lithium manganate and conductive agent mixture, add material stirring 5 hours, obtained slurry obtains positive pole material 1 time through sieving Slurry material, the solid content of the positive electrode slurry is 70%.Before slurry preparation, LiFePO4 conductive agent is both needed in 140 DEG C of bakings Roasting 14 hours, conductive agent need to be toasted 4 hours at 135 DEG C.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 3 hours in water, be subsequently added conductive agent and stir 2.5 hours, added negative active core-shell material and stir 2.5 hours, then add Enter bonding agent to stir 2 hours, obtained slurry produces negative material slurry through sieving, and the solid content of the negative material slurry is 44%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is being evenly applied to the first coating area 202 and the second coating area 203 of plus plate current-collecting body just Anti- two sides, and reserved positive pole ear 201, positive pole coated face density is 33mg/cm2, it is then equal in the positive and negative of transition region 204 Even coating Al2O3Coating, is placed in 108 DEG C of baking boxs after the completion of positive pole coating and is toasted；Negative material slurry is uniformly coated Tow sides in the 3rd coating area 102 and the 4th coating area 103, and negative lug 101 is reserved, negative pole coated face density is 17mg mg/cm2, it is placed in 85 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.4g/cm3, negative pole compacting Density is 1.3g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Both positive and negative polarity lug position is accurately reserved during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece is toasted 12 hours at a temperature of 100 DEG C, Cathode pole piece is to toast 12 hours at 100 DEG C in temperature, continuous extraction argon gas 4 times every 3 hours in baking process, and baking terminates It is carried out continuously extraction argon gas again afterwards 5 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carries out follow-up work under vacuum conditions Sequence；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 175 DEG C, pressure be 0.3Mpa, time be 7 seconds bars Under part battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 120 DEG C of vacuum states, continuous extraction argon gas 4 times, baking every 5 hours in baking process 4 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 7
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, its structure and the basic be the same as Example 2 of preparation technology, it distinguishes master It is：Continuously it is connected between transition region 204 and the first coating area 202 and the second coating area 203 in the present embodiment, and transition The positive and negative in area 204 is uniformly coated with Al2O3Coating.The cathode pole piece of the present embodiment also corresponds to include transversely being distributed the 3rd Coating area 102, the coating area 103 of Kong Bo areas 104 and the 4th, the position in Kong Bo areas 104 and size are corresponding with transition region 204, and The positive and negative of 3rd coating area 102 and the 4th coating area 103 is uniformly coated with negative electrode material layer.Transition region 204 in the present embodiment Width be the overall width of anode pole piece 2 1/4.
Embodiment 8
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 6 of its structure, its difference is essentially consisted in：Such as Shown in Fig. 7, the first coating area 202, the coating area 203 of transition region 204 and second are longitudinally divided successively along anode pole piece in the present embodiment Cloth, and the width (referring to the fore-and-aft distance in Fig. 7) of transition region 204 is the 1/5 of anode pole piece length (fore-and-aft distance in Fig. 7), The cathode pole piece of the present embodiment also corresponds to the 3rd coating area 102, the coating of Kong Bo areas 104 and the 4th for including being sequentially distributed along longitudinal direction Area 103, the position in Kong Bo areas 104 and size are corresponding with transition region 204, and the 3rd coating area 102 and the 4th coating area 103 Positive and negative be uniformly coated with negative electrode material layer.The membrane thicknesses of the present embodiment be 17 μm, the electrolyte be ethylene carbonate, The mixture of diethyl carbonate and the ethyl ester of carbonic acid third, plus plate current-collecting body uses thickness for 18 μm of aluminium foil.
In the present embodiment, described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 92%, Superconduction carbon 2%, electrically conductive graphite 2%, Kynoar 4%.The negative current collector uses thickness for 14 μm of copper foil, negative pole collection The thickness of flow surface negative electrode material layer is 120 μm, and the negative electrode material layer is made up of the component of following mass percent：It is (natural Graphite+carbonaceous mesophase spherules) 94%, conductive black 2%, butadiene-styrene rubber 3%, sodium carboxymethylcellulose 1%.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, comprises the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added In N- methyl pyrrolidones, carry out being stirred under vacuum 2 hours under conditions of having circulating water, then add what is be well mixed The mixture of nickle cobalt lithium manganate and conductive agent, adds material stirring 4 hours, obtained slurry obtains positive electrode through sieving 2 times Slurry, the solid content of the positive electrode slurry is 60%.Before slurry preparation, LiFePO4 conductive agent is both needed in 150 DEG C of bakings 24 hours, conductive agent need to be toasted 5 hours at 120 DEG C.
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added into deionization Stirred 1 hour in water, be subsequently added conductive agent and stir 4 hours, added negative active core-shell material and stir 3 hours, be subsequently added viscous Connect agent to stir 3 hours, obtained slurry produces negative material slurry through sieving, and the solid content of the negative material slurry is 50%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is being evenly applied to the first coating area 202 and the second coating area 203 of plus plate current-collecting body just Anti- two sides, and reserved positive pole ear 201, positive pole coated face density is 24mg/cm2, it is then equal in the positive and negative of transition region 204 Even coating Al2O3Coating, is placed in 120 DEG C of baking boxs after the completion of positive pole coating and is toasted；Negative material slurry is uniformly coated Tow sides in the 3rd coating area 102 and the 4th coating area 103, and negative lug 101 is reserved, negative pole coated face density is 12mg mg/cm2, it is placed in 75 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.2g/cm3, negative pole compacting Density is 1.6g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, laser Both positive and negative polarity lug position is accurately reserved during cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece is toasted 10 hours at a temperature of 118 DEG C, Cathode pole piece is to toast 12 hours at 80 DEG C in temperature, continuous extraction argon gas 3 times every 2 hours in baking process, and baking terminates It is carried out continuously extraction argon gas again afterwards 4 times, then cooling pole piece, to less than 45 DEG C, takes out pole piece and carries out follow-up work under vacuum conditions Sequence；
Step 5: the preparation of battery
Anode pole piece 2 after baking, cathode pole piece 1 and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear 201 and negative lug 101 are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 150 DEG C, pressure be 0.2Mpa, time be 5 seconds bars Under part battery top and a wherein side are sealed with sealing machine；
Step 7: battery core baking and battery liquid-filling
Battery core 24 hours is toasted under 120 DEG C of vacuum states, continuous extraction argon gas 4 times, baking every 6 hours in baking process 3 argon gas of extraction are carried out continuously again after roasting end, and then cooling pole piece, to less than 45 DEG C, takes out battery core and carried out under vacuum conditions Fluid injection process, then seals another side of battery, then shelves battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C chargings 2.5 are small When, degasification, heat-sealing, cutting edge, shaping then are carried out to battery；Battery partial volume technique is：1C constant currents are charged to 4.2V, then in 4.2V Lower constant-current constant-voltage charging, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released holds for battery Amount.
Embodiment 9
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, the basic be the same as Example 1 of its structure, its difference is essentially consisted in：Institute The positive electrode material layer stated is made up of the component of following mass percent：Nickle cobalt lithium manganate 95%, conductive black 1%, CNT 2%th, Kynoar 2%.The negative electrode material layer is made up of the component of following mass percent：Carbonaceous mesophase spherules 93%, Superconduction carbon 2%, butadiene-styrene rubber 3%, sodium carboxymethylcellulose 2%.The electrolyte is dimethyl carbonate.
The preparation method of the above-mentioned Soft Roll ternary electrokinetic cell of the present embodiment, its preparation technology be the same as Example 1.
Embodiment 10
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, its structure and the basic be the same as Example 6 of preparation technology, it distinguishes master It is：Described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 93%, superconduction carbon 3%, squama Piece graphite 1%, Kynoar 3%.The negative electrode material layer is made up of the component of following mass percent：(native graphite+in Between phase carbosphere) 94%, conductive black 2%, superconduction carbon 1%, butadiene-styrene rubber 2%, sodium carboxymethylcellulose 1%；The electrolysis Liquid is diethyl carbonate.
Embodiment 11
A kind of Soft Roll ternary electrokinetic cell of the present embodiment, its structure and the basic be the same as Example 6 of preparation technology, it distinguishes master It is：Described positive electrode material layer is made up of the component of following mass percent：Nickle cobalt lithium manganate 94%, conductive black 2%, Kynoar 4%.The negative electrode material layer is made up of the component of following mass percent：Native graphite 94%, conductive black 2%th, electrically conductive graphite 2%, butadiene-styrene rubber 2%.The electrolyte is the mixture of diethyl carbonate and the ethyl ester of carbonic acid third.

Claims (10)

1. a kind of Soft Roll ternary electrokinetic cell, including anode pole piece (2), cathode pole piece (1), barrier film, electrolyte and battery container, Anode pole piece (2), cathode pole piece (1) and barrier film formation barrier film/negative pole/barrier film/positive pole laminated structure battery, its feature exist In：Described anode pole piece (2) includes plus plate current-collecting body, and the plus plate current-collecting body includes the first coating area (202), the second coating area (203) transition region (204) and between the first coating area (202) and the second coating area (203), first coating area And the positive and negative of the second coating area (203) is equipped with positive electrode material layer (202).
2. a kind of Soft Roll ternary electrokinetic cell according to claim 1, it is characterised in that：The transition region (204) and the It is that discontinuous is connected between one coating area (202) and the second coating area (203), the spacing distance between adjacent linkage section is 2-3mm, the positive and negative of the transition region (204) is uniformly coated with positive electrode material layer.
3. a kind of Soft Roll ternary electrokinetic cell according to claim 2, it is characterised in that：First coating area (202), Second coating area (203) and transition region (204) are along anode pole piece (2) laterally or longitudinally equally distributed three regions；It is described Cathode pole piece (1) includes negative current collector, and the positive and negative of negative current collector is uniformly coated with negative electrode material layer.
4. a kind of Soft Roll ternary electrokinetic cell according to claim 1, it is characterised in that：The transition region (204) and the It is continuous between one coating area (202) and the second coating area (203) to be connected, and the positive and negative of transition region (204) is uniformly coated with Al2O3Coating.
5. a kind of Soft Roll ternary electrokinetic cell according to claim 4, it is characterised in that：When the first coating area (202), When two coating areas (203) and transition region (204) are sequentially distributed along anode pole piece (2) is horizontal, the width of transition region (204) is positive pole The 1/4 of pole piece (2) overall width；When the first coating area (202), the second coating area (203) and transition region (204) are along anode pole piece (2) when longitudinal direction is sequentially distributed, the width of transition region (204) is the 1/5 of anode pole piece (2) overall length.
6. a kind of Soft Roll ternary electrokinetic cell according to claim 4 or 5, it is characterised in that：Described cathode pole piece (1) Including negative current collector, the negative current collector includes the 3rd coating area (102), the 4th coating area (103) and Kong Bo areas (104), The position in Kong Bo areas (104) and size are corresponding with transition region (204), and the 3rd coating area (102) and the 4th coating area (103) Positive and negative be uniformly coated with negative electrode material layer.
7. a kind of Soft Roll ternary electrokinetic cell according to any one of claim 1-5, it is characterised in that：The positive pole collection Fluid uses thickness for 12~25 μm of aluminium foil, and the negative current collector uses thickness for 10~15 μm of copper foil；It is described every Film uses thickness for 15 μm~25 μm of polypropylene+ceramic diaphragm or polyethylene+ceramic diaphragm or polypropylene+polyethylene+poly- third Alkene trilamellar membrane or nonwoven cloth diaphragm, described electrolyte are lithium hexafluoro phosphate, methyl ethyl carbonate, ethylene carbonate, carbonic acid diformazan One or more of mixtures in ester, diethyl carbonate and the ethyl ester of carbonic acid third, described battery container by laminated aluminum film and Into.
8. a kind of Soft Roll ternary electrokinetic cell according to any one of claim 1-5, it is characterised in that：Described positive pole Material layer is made up of positive active material, binding agent and conductive agent, and wherein positive active material uses nickle cobalt lithium manganate ternary material Material, binding agent uses Kynoar, and conductive agent uses conductive black, superconduction carbon, electrically conductive graphite, crystalline flake graphite and CNT In one or more；Described negative electrode material layer is made up of negative active core-shell material, conductive agent, thickener and binding agent, wherein Negative active core-shell material uses the one or more in Delanium, native graphite, carbonaceous mesophase spherules and hard carbon material, conductive agent Using the one or more in conductive carbon black, superconduction carbon, electrically conductive graphite；Thickener uses sodium carboxymethylcellulose, and binding agent is adopted Use butadiene-styrene rubber.
9. a kind of Soft Roll ternary electrokinetic cell according to claim 8, it is characterised in that：Described positive electrode material layer is by such as The component composition of lower mass percent：Nickle cobalt lithium manganate 92%~95%, superconduction carbon 1%~3%, electrically conductive graphite 1%~3%, CNT 0%~2%, Kynoar 2%~4%；Described negative electrode material layer by following mass percent component group Into：Negative active core-shell material 92%~95%, conductive black 1%~3%, electrically conductive graphite 0%~2%, butadiene-styrene rubber 2%~4%, Sodium carboxymethylcellulose 1%~2%.
10. a kind of preparation method of Soft Roll ternary electrokinetic cell as claimed in any one of claims 1-9 wherein, it is characterised in that Comprise the following steps：
Step 1: the preparation of slurry
(1) preparation of positive electrode slurry：Anode sizing agent is configured by solvent of 1-METHYLPYRROLIDONE, binding agent is added into N- first In base pyrrolidones, carry out being stirred under vacuum 2~3 hours under conditions of having circulating water, then add well mixed nickel The mixture of cobalt manganic acid lithium and conductive agent, adds material stirring 3~6 hours, and obtained slurry produces positive electrode through sieving and starched Material, the solid content of positive electrode slurry is 60%~75%；Before slurry preparation, nickle cobalt lithium manganate is placed at 120~150 DEG C Baking 12~24 hours, conductive agent is placed at 120~150 DEG C and toasted 4~6 hours；
(2) preparation of negative material slurry：Cathode size is prepared by medium of deionized water, thickener is added in deionized water Stirring 1~3 hour, is subsequently added conductive agent and stirs 2~4 hours, adds negative active core-shell material and stirs 2~5 hours, then adds Enter bonding agent to stir 2~3 hours, obtained slurry produces negative material slurry, the solid content of negative material slurry through sieving For 38~50%；
Step 2: both positive and negative polarity is coated with
Positive electrode slurry is being evenly applied to the first coating area (202) and the second coating area (203) of plus plate current-collecting body just Anti- two sides, and reserved positive pole ear (201) position, positive pole coated face density is 25~38mg/cm2, then in transition region (204) Positive and negative uniformly coats positive electrode slurry or Al2O3Coating, is placed in 95~120 DEG C of baking boxs after the completion of positive pole coating and is dried It is roasting；Negative material slurry is evenly applied to the tow sides of negative current collector coating area, and reserved negative lug (101) position, Negative pole coated face density is 13.6~22mg/cm2, it is placed in 70~110 DEG C of baking boxs and is toasted after the completion of negative pole coating；
Step 3: pole piece roll-in and cutting
Positive pole after coating and cathode pole piece are subjected to roller process, positive pole compacted density is 3.0~3.8g/cm3, negative pole compacting Density is 1.2~1.6g/cm3, then the good positive/negative plate of roll-in is cut by laser according to the manufacturing specification of battery pole piece, Both positive and negative polarity lug position is accurately reserved during laser cutting；
Step 4: pole piece is toasted
The pole piece of well cutting is placed under vacuum state and toasted, anode pole piece (2) toasts 10 at a temperature of 100~130 DEG C ~12 hours, cathode pole piece (1) was toasted 10~12 hours in the case where temperature is 80~100 DEG C, every 2~4 hours in baking process Continuously extraction argon gas 3~5 times, baking is carried out continuously extraction argon gas 3~5 times after terminating, pole is then cooled down under vacuum conditions again Piece takes out pole piece and carries out subsequent handling to less than 45 DEG C；
Step 5: the preparation of battery
Anode pole piece (2) after baking, cathode pole piece (1) and barrier film are overlapped, barrier film/negative pole/barrier film/positive pole is formed and folds Slice structure battery core；
Step 6: both positive and negative polarity tab welding, battery core enter shell and encapsulation
Positive pole ear (201) and negative lug (101) are respectively welded in the reserved collection of both positive and negative polarity pole piece according to battery design requirement On fluid, then battery core is fitted into made battery container, temperature be 150~250 DEG C, pressure be 0.2~0.5Mpa, when Between be with sealing machine to seal battery top and a wherein side under the conditions of 5~10 seconds；
Step 7: battery core baking and battery liquid-filling
Battery core 20~24 hours is toasted under 80~120 DEG C of vacuum states, in baking process every 4~6 hours continuous extraction argon Gas 2~4 times, baking terminate after be carried out continuously 3~5 argon gas of extraction again, then under vacuum conditions cooling pole piece to 45 DEG C with Under, take out battery core and carry out fluid injection process, then seal another side of battery, then shelve battery 24 hours；
Step 8: Battery formation and partial volume
Using being melted into limited time, chemical synthesis technology is：0.05C charges 5 hours, and+0.1C charges 4 hours, and+0.2C charges 2.5 hours, so Degasification, heat-sealing, cutting edge, shaping are carried out to battery afterwards；Battery partial volume technique is：1C constant currents are charged to 4.2V, then constant current at 4.2v Constant-voltage charge, cut-off current is 0.05C, then discharges into 2.75V with 1C, and the capacity that now battery is released is battery capacity.
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