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CN105733332A - Flame-retardant coating and lithium ion battery employing same - Google Patents

Flame-retardant coating and lithium ion battery employing same Download PDF

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Publication number
CN105733332A
CN105733332A CN201610118452.9A CN201610118452A CN105733332A CN 105733332 A CN105733332 A CN 105733332A CN 201610118452 A CN201610118452 A CN 201610118452A CN 105733332 A CN105733332 A CN 105733332A
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China
Prior art keywords
retardant coating
flame retardant
lithium ion
ion battery
flame
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Pending
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CN201610118452.9A
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Chinese (zh)
Inventor
刘静
高秀玲
王立仕
王驰伟
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Tianjin EV Energies Co Ltd
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Tianjin EV Energies Co Ltd
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Priority to CN201610118452.9A priority Critical patent/CN105733332A/en
Publication of CN105733332A publication Critical patent/CN105733332A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
    • C09D109/06—Copolymers with styrene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/16—Homopolymers or copolymers of vinylidene fluoride
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2244—Oxides; Hydroxides of metals of zirconium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/267—Magnesium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • 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
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Abstract

The invention provides a flame-retardant coating, and belongs to the technical field of lithium ion batteries. The flame-retardant coating is prepared from the following raw materials in percentage by mass: 15 to 50 percent of a flame-retardant additive, 45 to 80 percent of a solvent and 0.5 to 12 percent of an adhesive. The invention also provides a lithium ion battery employing the flame-retardant coating and a preparation method for the lithium ion battery. The flame-retardant coating has flame-retardant, heat insulation and insulation functions, large-scale thermal runaway of the lithium ion battery can be effectively prevented and inhibited in both chemical and physical manners, and safety of the lithium ion battery is improved.

Description

A kind of flame retardant coating and apply the lithium ion battery of this flame retardant coating
Technical field
The present invention relates to technical field of lithium ion, specifically a kind of flame retardant coating and apply the lithium ion battery of this flame retardant coating.
Background technology
Due to lithium ion battery there is energy density height, running voltage height, broad application temperature range, have extended cycle life, the advantage of memory-less effect, in work military, medical, electronic, 3C, energy storage, and the field such as electric vehicle is obtained for and is widely applied.But, along with lithium ion battery occur in these field application processes catch fire, the generation of the security incident such as blast, lithium ion battery thermal runaway problem under extreme service condition highlights day by day, becomes the major issue that this field is urgently to be resolved hurrily.
Lithium ion battery adds safety coatings or organic fire-resisting additive, is one of method improving lithium ion battery safety performance.
The metal-oxide that the composition of existing safety coatings is mainly representative with aluminium oxide.Metal-oxide type coating has effect heat insulation, insulation, it is possible to reduces the internal short-circuit of battery core to a certain extent, reduces the formation of thermal runaway reflecting point.But thermal runaway reflecting point is once be formed, after thermal runaway reaction is triggered, this safety coatings only serves physical means and intercepts both positive and negative polarity pole piece, slow down the effect of thermal runaway heat of reaction diffusion, in the relatively low initial stage of thermal runaway reaction temperature, can not play and evacuate heat and reduce thermal runaway area, slow down the effect of thermal runaway severe degree.
Based on the electrolyte organic fire-resisting additive of phosphoric acid ester, phosphorous acid esters, organic halogen class and phosphonitrile class, the thermal runaway reaction tool suppressing lithium ion battery is had certain effect, but this organic fire-resisting additive cost is high, the performance of lithium ion battery is had a certain impact, such as high rate performance is deteriorated, cycle life minimizing etc..Such organic fire-resisting additive and the electrolyte poor compatibility of general formula, need to mate the electrolyte of special formulation (solvent, solute, additives ratio), could will not reduce the chemistry of electrolyte, electrochemical stability.Meanwhile, its flame retardant effect is closely related with the formula mating electrolyte, only mates suitable electrolyte prescription, and such organic fire-resisting additive competence exertion goes out flame retardant effect.Furthermore, in the normal discharge and recharge use procedure of lithium ion battery, organic flame-retardant additive is in silent status, does not play fire retardation.After the performance of its fire retardation depends on thermal runaway reaction generation, flame-retardant additive is triggered, by occurring organic reaction to form fire retardant matter, thus playing flame retardant effect.But, in actual thermal runaway course of reaction, owing to organic reaction rate is relatively low, before flame-retardant additive reaction forms the material with flame retardant effect, thermal runaway reaction is just spread on a large scale, enters uncontrollable state.To sum up, the organic fire-resisting additive flame retardant effect being applied to electrolyte is poor, narrow application range, it is difficult to large-scale promotion.
The present invention provides a kind of flame retardant coating and applies the lithium ion battery of this flame retardant coating.Flame retardant coating has fire-retardant, heat insulation and insulating effect, it is possible to effectively prevented and suppress the extensive thermal runaway of lithium ion battery by dual mode chemically and physically, improves lithium ion battery security.Meanwhile, the feature that this flame retardant coating and battery thereof also have easy processing, cost is low.
Summary of the invention
In view of this, it is desirable to provide a kind of flame retardant coating, there is fire-retardant, heat insulation and insulating effect, it is possible to effectively prevented and suppress the extensive thermal runaway of lithium ion battery by dual mode chemically and physically, improve lithium ion battery security.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that: a kind of flame retardant coating, comprise the raw material of following mass percent:
Flame-retardant additive 15～50%
Solvent 45～80%
Binding agent 0.5～12%.
Further, the raw material of following mass percent is comprised:
Flame-retardant additive 35～50%
Solvent 55～65%
Binding agent 2～10%.
Further, described flame-retardant additive is that one or more in alkali metal hydroxide, alkali carbonate, alkali metal hydrogencarbonate use with arbitrary proportion mixing.
Further, described flame-retardant additive is that one or more in aluminium hydroxide, boehmite, boehmite, zirconium hydroxide, magnesium carbonate, basic magnesium carbonate, calcium carbonate use with arbitrary proportion mixing.
Further, described binding agent is that one or more in acrylate, epoxy resin, butadiene-styrene rubber, sodium carboxymethyl cellulose, polyurethane, Kynoar, PVP use with arbitrary proportion mixing.
Further, described solvent is that one or more in water, NMP, acetone, ethanol use with arbitrary proportion mixing.
Present invention also offers the lithium ion battery applying above-mentioned flame retardant coating.
A kind of lithium ion battery, including positive plate, negative plate, barrier film and electrolyte, at least one side of the positive plate of lithium ion battery, negative plate or barrier film is coated with flame retardant coating.
The preparation method that present invention also offers above-mentioned lithium ion battery.
The preparation method of above-mentioned lithium ion battery, comprises the steps:
(1) weigh each raw material components, after dispersion, obtain the slurry of flame retardant coating；
(2) slurry of flame retardant coating is coated at least one side of positive plate, negative plate or barrier film, positive plate, negative plate or barrier film are formed flame retardant coating；
(3) it is coated with that the positive plate of flame retardant coating, negative plate or barrier film carry out rolling, encapsulation joined by die-cut luggage of going forward side by side, forms core of lithium ion cell bag；
(4) battery bag is carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, namely obtain positive pole, negative pole or barrier film are coated with the lithium ion battery of flame retardant coating.
Further, the one side coating thickness of described flame retardant coating is 0.5～10 μm.
Further, described flame retardant coating is coated in the surface density on positive plate, negative plate or barrier film is 0.05～1.3mg/cm2
Relative to prior art, present invention have the advantage that
Compared with the existing technology directly adopting insulation, heat insulation general inorganic metal oxide-type safety coatings, flame retardant coating of the present invention except due to its insulating effect, can play in the normal charge and discharge process of lithium ion battery reduce internal short-circuit effect except, also have the advantage that
(1) flame-retardant additive that the present invention adopts is metal hydroxides, alkali carbonate, alkali metal hydrogencarbonate class, the initial stage that extensive thermal runaway, runaway temperature are relatively low is not yet reached at lithium ion battery, the decomposition reaction of heat absorption can be there is, the heat of absorption portion thermal runaway release, slows down the quick rising of thermal runaway temperature；
(2) this decomposition reaction is attended by the release of non-combustible gas, and the gas discharged can take away the heat of part thermal runaway reaction, causes that positive and negative plate spacing strengthens, slow down the diffusion of thermal runaway reaction after gas release；
(3), after flame retardant coating decomposition discharges gas, generate the inorganic, metal oxide with insulation, heat-blocking action in former flame retardant coating position, in the way of physics, intercepted lithium ion battery subsequent thermal response path out of control and calorie spread further；
(4) metal hydroxides of present invention employing, alkali carbonate, alkali metal hydrogencarbonate class material have cheap compared with its corresponding inorganic, metal oxide class material, and hardness is low, equipment attrition is little, the advantage of easy processing；
(5) flame retardant coating of the present invention is with certain thickness and density, uniformly, continuously by the positive and negative plate of lithium ion battery or barrier film all covers, and active area is big；
(6) flame retardant coating is coated in the surface of positive and negative plate or barrier film continuously, and in industry, conventional known equipment can meet processing request, it is not necessary to use equipment for customizing；
(7) flame retardant coating covers the surface of positive and negative plate or barrier film uniformly, continuously, and the more discrete coating method of interface consistency between positive and negative plate is higher, and the Electrochemical Performances of lithium ion battery is little.
With existing to compared with electrolyte adds the technology of organic flame-retardant additive, in the normal discharge and recharge use procedure of lithium ion battery, flame retardant coating of the present invention is in chemistry and electrochemicaUy inert, good with various types of electrolyte compatibility, and the chemical property of lithium ion battery is not affected；Meanwhile, flame retardant coating of the present invention plays chemical flame retardant effect by the mode of inorganic reaction, and relatively organic reaction speed is fast, it is possible to have an effect immediately after thermal runaway reaction occurs, ageing higher than organic fire-resisting additive.
Detailed description of the invention
Below in conjunction with embodiment and comparative example, the present invention will be described.
Embodiment 1
A kind of flame retardant coating, each raw material components quality is as follows: boehmite 0.45kg, water 0.45kg, acrylate 0.10kg.
Embodiment 2
A kind of flame retardant coating, each raw material components quality is as follows: aluminium hydroxide 0.35kg, water 0.55kg, sodium carboxymethyl cellulose 0.03kg, acrylate 0.03kg, styrene butadiene rubber sbr 0.04kg.
Embodiment 3
A kind of flame retardant coating, each raw material components quality is as follows: boehmite 0.20kg, water 0.75kg, sodium carboxymethyl cellulose 0.02kg, butadiene-styrene rubber 0.03kg.
Embodiment 4
A kind of flame retardant coating, each raw material components quality is as follows: calcium carbonate 0.50kg, water 0.45kg, sodium carboxymethyl cellulose 0.03kg, butadiene-styrene rubber 0.02kg.
Embodiment 5
A kind of flame retardant coating, each raw material components quality is as follows: zirconium hydroxide 0.25kg, NMP0.65kg, polyurethane 0.10kg.
Embodiment 6
A kind of flame retardant coating, each raw material components quality is as follows: magnesium carbonate 0.15kg, basic magnesium carbonate 0.15kg, NMP0.60kg, Kynoar 0.10kg.
Embodiment 7
A kind of flame retardant coating, each raw material components quality is as follows: aluminium hydroxide 0.25kg, zirconium hydroxide 0.15kg, acetone 0.05kg, NMP0.45kg, Kynoar 0.08kg, PVP 0.02kg.
Embodiment 8
A kind of flame retardant coating, each raw material components quality is as follows: basic magnesium carbonate 0.45kg, water 0.50kg, acrylate 0.02kg, epoxy resin 0.03kg.
Embodiment 9
A kind of flame retardant coating, each raw material components quality is as follows: boehmite 0.20kg, boehmite 0.25kg, NMP0.50kg, polyurethane 0.03kg, Kynoar 0.02kg.
Embodiment 10
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the negative plate of lithium ion battery is coated with flame retardant coating.
The preparation method of above-mentioned lithium ion battery, comprises the steps:
(1) weigh each raw material components, add planet stirring tank, with the Rate Dispersion 5h of the 30rpm/s that revolves round the sun, rotation 2000rpm/s, namely obtain the slurry of flame retardant coating；
(2) being coated on the tow sides of negative plate by the slurry of flame retardant coating, form flame retardant coating on the tow sides of negative plate, the one side coating thickness of flame retardant coating is 1 μm, and surface density is 0.1mg/cm2；
(3) it is coated with that the negative plate of flame retardant coating carries out with corresponding positive plate and barrier film rolling, encapsulation joined by die-cut luggage of going forward side by side, and forms core of lithium ion cell bag；
(4) battery bag being carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, and namely obtains negative pole and is coated with the lithium ion battery of flame retardant coating.
Embodiment 11
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the negative plate of lithium ion battery is coated with flame retardant coating.
Its manufacture method is with embodiment 10, and the difference is that forming flame retardant coating in the one side of negative plate, the one side coating thickness of flame retardant coating is 3 μm, and surface density is 0.4mg/cm2。
Embodiment 12
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the negative plate of lithium ion battery is coated with flame retardant coating.
Its manufacture method is with embodiment 10, and the difference is that forming flame retardant coating in the one side of negative plate, the one side coating thickness of flame retardant coating is 8 μm, and surface density is 1mg/cm2。
Embodiment 13
The lithium ion battery of application flame retardant coating slurry described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the positive plate of lithium ion battery is coated with flame retardant coating.
The preparation method of above-mentioned lithium ion battery, comprises the steps:
(1) weigh each raw material components, add planet stirring tank, with the Rate Dispersion 5h of the 30rpm/s that revolves round the sun, rotation 2000rpm/s, namely obtain the slurry of flame retardant coating；
(2) being coated in the one side of positive plate by the slurry of flame retardant coating, form flame retardant coating in the one side of positive plate, the one side coating thickness of flame retardant coating is 1 μm, and surface density is 0.1mg/cm2；
(3) it is coated with that the positive plate of flame retardant coating carries out with corresponding negative plate and barrier film rolling, encapsulation joined by die-cut luggage of going forward side by side, and forms core of lithium ion cell bag；
(4) battery bag being carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, and namely obtains negative pole and is coated with the lithium ion battery of flame retardant coating.
Embodiment 14
The lithium ion battery of application flame retardant coating slurry described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the positive plate of lithium ion battery is coated with flame retardant coating.
Its manufacture method is same embodiment 13, and the difference is that forming flame retardant coating in the one side of positive plate, the one side coating thickness of flame retardant coating is 5 μm, and surface density is 0.6mg/cm2。
Embodiment 15
The lithium ion battery of application flame retardant coating slurry described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the positive plate of lithium ion battery is coated with flame retardant coating.
Its manufacture method is same embodiment 13, and the difference is that forming flame retardant coating in the one side of positive plate, the one side coating thickness of flame retardant coating is 8 μm, and surface density is 1mg/cm2。
Embodiment 16
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the barrier film of lithium ion battery is coated with flame retardant coating.
The preparation method of above-mentioned lithium ion battery, comprises the steps:
(1) weigh each raw material components, add planet stirring tank, with the Rate Dispersion 5h of the 30rpm/s that revolves round the sun, rotation 2000rpm/s, namely obtain the slurry of flame retardant coating；
(2) being coated in the one side of barrier film by the slurry of flame retardant coating, form flame retardant coating in the one side of barrier film, the one side coating thickness of flame retardant coating is 3 μm, and surface density is 0.4mg/cm2；
(3) be coated with that the barrier film of flame retardant coating carries out with corresponding positive plate and negative plate rolling, encapsulation joined by die-cut luggage of going forward side by side, wherein, be coated with flame retardant coating barrier film one facing to negative pole, form core of lithium ion cell bag；
(4) battery bag being carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, and namely obtains barrier film and is coated with the lithium ion battery of flame retardant coating.
Embodiment 17
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the barrier film of lithium ion battery is coated with flame retardant coating.
Its manufacture method with embodiment 16, the difference is that be coated with flame retardant coating barrier film one facing to positive pole.
Embodiment 18
Described in application above-described embodiment 1-9, the lithium ion battery of flame retardant coating, including positive plate, negative plate, barrier film and electrolyte, the barrier film of lithium ion battery is coated with flame retardant coating.
Its manufacture method is with embodiment 16, and the difference is that forming flame retardant coating on the two sides of barrier film, the one side coating thickness of flame retardant coating is 3 μm, and surface density is 0.4mg/cm2。
Embodiment 19
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the positive plate of lithium ion battery and barrier film is coated with flame retardant coating.
The preparation method of above-mentioned lithium ion battery, comprises the steps:
(1) weigh each raw material components, add planet stirring tank, with the Rate Dispersion 5h of the 30rpm/s that revolves round the sun, rotation 2000rpm/s, namely obtain the slurry of flame retardant coating；
(2a) slurry of flame retardant coating being coated in the two sides of positive plate, forms flame retardant coating on the two sides of positive plate, the one side coating thickness of flame retardant coating is 2 μm, and surface density is 0.2mg/cm2；
(2b) slurry of flame retardant coating being coated in the two sides of barrier film, forms flame retardant coating on the two sides of barrier film, the one side coating thickness of flame retardant coating is 2 μm, and surface density is 0.2mg/cm2；
(3) it is coated with the barrier film of flame retardant coating and positive plate carries out with corresponding negative plate rolling, encapsulation joined by die-cut luggage of going forward side by side, and forms core of lithium ion cell bag；
(4) battery bag being carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, and namely obtains barrier film and positive plate is coated with the lithium ion battery of flame retardant coating.
Embodiment 20
The lithium ion battery of application flame retardant coating described in above-described embodiment 1-9, including positive plate, negative plate, barrier film and electrolyte, the negative plate of lithium ion battery and barrier film is coated with flame retardant coating.
The preparation method of above-mentioned lithium ion battery, comprises the steps:
(1) weigh each raw material components, add planet stirring tank, with the Rate Dispersion 5h of the 30rpm/s that revolves round the sun, rotation 2000rpm/s, namely obtain the slurry of flame retardant coating；
(2a) slurry of flame retardant coating being coated in the two sides of negative plate, forms flame retardant coating on the two sides of negative plate, the one side coating thickness of flame retardant coating is 1 μm, and surface density is 0.1mg/cm2；
(2b) slurry of flame retardant coating being coated in the two sides of barrier film, forms flame retardant coating on the two sides of barrier film, the one side coating thickness of flame retardant coating is 2 μm, and surface density is 0.2mg/cm2；
(3) it is coated with the barrier film of flame retardant coating and negative plate carries out with corresponding positive plate rolling, encapsulation joined by die-cut luggage of going forward side by side, and forms core of lithium ion cell bag；
(4) battery bag being carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, and namely obtains barrier film and positive plate is coated with the lithium ion battery of flame retardant coating.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (10)

1. a flame retardant coating, it is characterised in that: comprise the raw material of following mass percent:
Flame-retardant additive 15～50%
Solvent 45～80%
Binding agent 0.5～12%.
2. flame retardant coating according to claim 1, it is characterised in that: comprise the raw material of following mass percent:
Flame-retardant additive 35～50%
Solvent 55～65%
Binding agent 2～10%.
3. flame retardant coating according to claim 1 and 2, it is characterised in that: described flame-retardant additive is that one or more in alkali metal hydroxide, alkali carbonate, alkali metal hydrogencarbonate use with arbitrary proportion mixing.
4. flame retardant coating according to claim 3, it is characterised in that: described flame-retardant additive is that one or more in aluminium hydroxide, boehmite, boehmite, zirconium hydroxide, magnesium carbonate, basic magnesium carbonate, calcium carbonate use with arbitrary proportion mixing.
5. flame retardant coating according to claim 1, it is characterised in that: described binding agent is that one or more in acrylate, epoxy resin, butadiene-styrene rubber, sodium carboxymethyl cellulose, polyurethane, Kynoar, PVP use with arbitrary proportion mixing.
6. flame retardant coating according to claim 1, it is characterised in that: described solvent is that one or more in water, NMP, acetone, ethanol use with arbitrary proportion mixing.
7. a lithium ion battery, it is characterised in that include positive plate, negative plate, barrier film and electrolyte, at least one side of the positive plate of lithium ion battery, negative plate or barrier film is coated with flame retardant coating.
8. the method preparing lithium ion battery as claimed in claim 7, it is characterised in that: comprise the steps:
(1) weigh each raw material components, after dispersion, obtain the slurry of flame retardant coating；
(2) slurry is coated at least one side of positive plate, negative plate or barrier film, positive plate, negative plate or barrier film are formed flame retardant coating；
(3) it is coated with that the positive plate of flame retardant coating, negative plate or barrier film carry out rolling, encapsulation joined by die-cut luggage of going forward side by side, forms core of lithium ion cell bag；
(4) battery bag is carried out fluid injection, ageing, the lithium ion battery after ageing is melted into, namely obtain positive pole, negative pole or barrier film are coated with the lithium ion battery of flame retardant coating.
9. the preparation method of lithium ion battery according to claim 8, it is characterised in that: the one side coating thickness of described flame retardant coating is 0.5～10 μm.
10. the preparation method of lithium ion battery according to claim 8, it is characterised in that: it is 0.05～1.3mg/cm that described flame retardant coating is coated in the surface density on positive plate, negative plate or barrier film2。
CN201610118452.9A 2016-03-01 2016-03-01 Flame-retardant coating and lithium ion battery employing same Pending CN105733332A (en)

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WO2020028170A1 (en) * 2018-07-30 2020-02-06 Cadenza Innovation, Inc. Lithium ion battery
WO2020028168A1 (en) * 2018-07-30 2020-02-06 Cadenza Innovation, Inc. Housing for rechargeable batteries
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CN109148791A (en) * 2018-08-14 2019-01-04 江苏海基新能源股份有限公司 A kind of high safety diaphragm production method
CN110358346A (en) * 2019-08-07 2019-10-22 河南中柏防火涂料科技有限公司 A kind of environmental-protection flame-retardant additive and preparation method thereof
CN110408081A (en) * 2019-08-07 2019-11-05 河南中柏防火涂料科技有限公司 A kind of flame-retardant composite material for building and preparation method thereof
CN110724415A (en) * 2019-09-02 2020-01-24 深圳市劢全新材料科技有限责任公司 Composition, preparation method and application of composition in battery diaphragm coating material
WO2021244166A1 (en) * 2020-06-01 2021-12-09 Oppo广东移动通信有限公司 Flame retardant coating, electronic device battery cover plate, and electronic device
CN111640978A (en) * 2020-07-10 2020-09-08 湖北亿纬动力有限公司 Lithium ion battery and preparation method and application thereof
CN112029343A (en) * 2020-07-17 2020-12-04 清华大学 Coating, positive plate, negative plate, diaphragm and lithium ion battery for inhibiting thermal runaway of lithium ion battery
CN112332022A (en) * 2020-11-03 2021-02-05 贵州梅岭电源有限公司 A kind of porous green vermiculite sheet and its application method in lithium ion battery
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