CN110387090A - Battery packages shell material, battery case, preparation method and battery - Google Patents

Battery packages shell material, battery case, preparation method and battery Download PDF

Info

Publication number
CN110387090A
CN110387090A CN201810356939.XA CN201810356939A CN110387090A CN 110387090 A CN110387090 A CN 110387090A CN 201810356939 A CN201810356939 A CN 201810356939A CN 110387090 A CN110387090 A CN 110387090A
Authority
CN
China
Prior art keywords
layer
modified plastics
battery
plastics layer
shell material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810356939.XA
Other languages
Chinese (zh)
Inventor
杨东坡
吴丛笑
葛铁军
郭伟
文泽哲
刘阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing National Battery Technology Co Ltd
Original Assignee
Beijing National Battery Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing National Battery Technology Co Ltd filed Critical Beijing National Battery Technology Co Ltd
Priority to CN201810356939.XA priority Critical patent/CN110387090A/en
Publication of CN110387090A publication Critical patent/CN110387090A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, 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 an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/12—Copolymers of styrene with unsaturated nitriles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention belongs to technical field of secondary batteriess, are related to the packaging material of secondary cell, and in particular to a kind of battery packages shell material, battery case, preparation method and battery.Battery packages shell material provided by the invention, the modified plastics layer including separation layer and comprising the first modified plastics layer and the second modified plastics layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading；The modified plastics layer includes following component: SAN, POE, compatilizer and optional auxiliary agent.Packaging shell material of the invention has certain intensity, good impact resistance, preferable heat resistance, lower water imbibition, preferable electrical insulating property and preferable corrosion resistance, the leakage that can prevent electrolyte guarantees the safety of battery, reduces the production cost of battery.

Description

Battery packages shell material, battery case, preparation method and battery
Technical field
The invention belongs to technical field of secondary batteriess, are related to the packaging material of secondary cell, and in particular to a kind of battery pack Fill shell material, battery case, preparation method and battery.
Background technique
Battery plays an important role as energy-storage units in all trades and professions, such as the power battery being concerned at present is extensive For fields such as new-energy automobiles.And the packaging material in all batteries, for cell devices such as encapsulated electrode and electrolyte As integral component.Current battery generally uses aluminium as the shell of battery, and usually we claim this kind of batteries For aluminum-shell battery, in aluminum-shell battery, metallic has detrimental effects to battery security, when the lamination thickness of battery battery core reaches To after certain thickness, due to using aluminum hull so just needing to consider the safety of battery.In order to allow battery to have Higher safety, while considering reduced cost, existing battery starts slowly using case material of the plastics as battery. Since plastics are lower as the case material cost of battery than aluminium as the case material of battery, while shape can also be met Diversification is thinned, the requirement of lighting, thus people are more prone to the case material for using plastics as battery, and then use Plastics start to become a kind of development trend as the case material of battery.
But the battery of the existing case material as battery that uses plastics there is a problem of it is very much, such as: plastic housing electricity Pond is by the problem of being easy to appear leakage after a period of use, general electric battery with plastic case is in the electrolyte after use in 2 years 5~15% can be lost, electric battery with plastic case service life is seriously affected；The intensity of current electric battery with plastic case, shock resistance are anti-aging Performance etc. is relatively poor, is easy to damage because being collided, reduces the service performance of battery.
Since battery has very high requirement to battery case materials, it is desirable that battery case should have certain intensity and impact resistance Property, while battery case should have preferable heat resistance and lower water imbibition, and battery case should also have preferable electricity absolutely Edge and corrosion resistance.
Impact strength is to measure a kind of index of toughness of material, is normally defined sample and fractures under the action of shock loading Or when jackknifing, energy that unit cross-sectional area is absorbed.Impact strength is used to evaluate the impact resistance or judgement material of material Brittleness and toughness degree.
However, common plastics are ABS plastic and PP plastics in the packaging material of current battery, ABS plastic has very Good impact strength, but that there are hot-air aging resistances is very poor because it haves the defects that double bond to make it.PP plastics have centainly Intensity, but its barrier property is poor, not can effectively solve the leakage problem of electrolyte.
Therefore, the comprehensive performance of the plastic material used in the case material of battery is also much insufficient at present, has To in being further improved or develop a kind of novel battery plastics shell material.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of battery packages shell material, is mentioned in background technique at least alleviating One of technical problem.
The second object of the present invention is to provide a kind of battery case, and the shell is mainly by above-mentioned battery packages shell material system At, have certain intensity, good shock resistance, preferable heat resistance, lower water imbibition, preferable electrical insulating property and Corrosion resistance can effectively prevent the generation of electrolyte leakage phenomenon, guarantee the safety of integral battery, help to improve lithium battery It waits the performance of secondary cells and prolongs the service life.
The third object of the present invention is to provide a kind of preparation method of battery case, this method have it is easy to operate, easily In implementation, low production cost, feature low for equipment requirements, industrialization large-scale production easy to accomplish.
The fourth object of the present invention is to provide a kind of battery, which has above-mentioned battery case, can promote battery tool There are high barrier property, excellent electrolyte resistance stability, heat resistance and electrical insulating property etc., ensure that the safety of battery, prolong The service life of battery is grown.
To achieve the above object, the technical solution adopted by the present invention are as follows:
According to an aspect of the present invention, the present invention provides a kind of battery packages shell material, including separation layer and includes The modified plastics layer of modified plastic layer and the second modified plastics layer, the first modified plastics layer, separation layer and second are modified Plastic layer is cascading；
The modified plastics layer includes following component: SAN, POE, compatilizer and optional auxiliary agent.
As further preferred technical solution, the modified plastics layer includes following component according to parts by weight:
50~100 parts of SAN, 0.1~45 part of POE, 1~8 part of compatilizer and 0~1 part of auxiliary agent；
Preferably, the modified plastics layer includes following component according to parts by weight:
50~90 parts of SAN, 8~44 parts of POE, 2~6 parts of compatilizer and 0.05~0.3 part of auxiliary agent；
Preferably, the modified plastics layer includes following component according to parts by weight:
55~75 parts of SAN, 20~40 parts of POE, 3~5 parts of compatilizer and 0.1~0.2 part of auxiliary agent.
As further preferred technical solution, the separation layer include in plastics, metal, alloy or metal composite extremely Few one kind；
Preferably, the separation layer by aluminizing, stainless steel, in EVOH, PVDC, PLA, PA, HDPE, PE-RT or PE-X At least one formed；Or,
The separation layer is by the alloy including at least any one in tin, aluminium, copper, iron, zinc, nickel, titanium, zirconium, chromium, manganese or magnesium It is formed；Or,
The separation layer is the metal including at least any one in tin, aluminium, copper, iron, zinc, nickel, titanium, zirconium, chromium, manganese or magnesium Compound is formed.
Preferably, chemical conversion processing is implemented at least one face of the separation layer.
As further preferred technical solution, the compatilizer is maleic anhydride graft compatilizer；
Preferably, the compatilizer includes at least one of PP-g-MAH, POE-g-MAH or PE-g-MAH；
Preferably, the compatilizer is PE-g-MAH；
Preferably, the grafting rate of the PE-g-MAH is 1.0%~2.2%, preferably 1.2%~2.0%, further Preferably 1.5%~1.8%.
As further preferred technical solution, the auxiliary agent includes antioxidant.
As further preferred technical solution, the number of plies of the first modified plastics layer and the second modified plastics layer is respectively only It is on the spot 1~20 layer, preferably 1~12 layer.
As further preferred technical solution, there is adhesive layer between the first modified plastics layer and separation layer；With/ Or,
There is adhesive layer between the second modified plastics layer and the separation layer；
Preferably, the first modified plastics layer with a thickness of 10~150 μm；
Preferably, the separation layer with a thickness of 5~100 μm；
Preferably, the second modified plastics layer with a thickness of 10~150 μm.
According to another aspect of the present invention, the present invention also provides a kind of battery cases, have the inside of storage battery empty Between, it is prepared using above-described battery packages shell material.
According to another aspect of the present invention, the present invention also provides the preparation method of the battery case described in more than one, It is prepared by the method for extrusion molding or injection molding；Or,
The method that the first modified plastics layer and the second modified plastics layer is respectively coated by two faces in the separation layer It is prepared；
Preferably, the preparation method of the modified plastics layer includes:
It will be mixed after SAN, POE, compatilizer and optional auxiliary agent drying, after extrusion, granulation, cooling, pelletizing and drying Injection molding obtains modified plastics layer.
According to another aspect of the present invention, the present invention also provides a kind of battery, have the battery case, anode, Cathode and electrolyte.
Compared with prior art, the beneficial effects of the present invention are:
(1), battery packages shell material provided by the invention is mainly changed by what SAN, POE and compatilizer formed including two layers Property the plastic layer and separation layer between this two layers of modified plastics layer, due to using the modified plastics layer, so that the packaging Shell material has certain intensity, good impact resistance, preferable heat resistance, lower water imbibition, preferable electrical insulating property With preferable corrosion resistance, the leakage of electrolyte can be prevented, guarantees the safety of battery, extends the service life of battery, into And plastic material heat resistance, resistance to ag(e)ing, intensity and/or the barrier property etc. of existing application in the cell housing is effectively relieved Performance is poor, the problem of electrolyte leakage easily occurs.
(2) by the present invention in that with high intensity, high performance plastics+high obstructing performance material+high intensity, high performance plastics Mode forms battery packages shell material, has various excellent mechanical properties, barrier property and thermal property etc., can satisfy electric battery with plastic case The requirement of (using plastics as the case material of battery) for its shell material, can be effectively relieved the leakage problem of electrolyte, push away Into application of the plastic material in battery case materials, battery production cost is reduced.
(3) battery case of the invention is mainly made of above-mentioned battery packages shell material, thus at least has and above-mentioned electricity Pack the identical advantage of shell material in pond.The preparation method of the battery case has the characteristics that cleaning, efficient, low cost, and grasps Make simple, productivity effect height, it is low for equipment requirements without complicated device systems, it is easy to accomplish extensive, industrial metaplasia It produces.
Battery of the invention has above-mentioned battery case, can promote battery with high barrier property, excellent resistance to electrolysis Liquid stability, heat resistance and electrical insulating property etc. ensure that the safety of battery, extend the service life of battery.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiments and examples, but this field skill Art personnel will be understood that following embodiments and embodiment are merely to illustrate the present invention, and are not construed as limiting model of the invention It encloses.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts Every other embodiment, shall fall within the protection scope of the present invention.The person that is not specified actual conditions, according to normal conditions or manufacturer builds The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase Product.
In a first aspect, providing at least one embodiment a kind of includes separation layer and comprising the first modified plastics layer and the The modified plastics layer of two modified plastics layers, the first modified plastics layer, separation layer and the second modified plastics layer are stacked gradually and are set It sets；
The modified plastics layer includes following component: SAN, POE, compatilizer and optional auxiliary agent.
Present invention is generally directed to use plastics as battery case materials there is also leakage is easy to appear at present, especially It is the performance of the electric battery with plastic case product in China, and only only a few even can reach day almost without several technical indicators of enterprise The level of this enterprise, main is exactly the technical problem unqualified there are electrolyte resistance and scouring depth.So that domestic lithium battery producer Significant cost pressure is faced, hence it is imperative that the cost of the lithium battery cost of raw material, especially battery packaging material is reduced, because The packaging material of this electric battery with plastic case realizes that import substitution, the demand of production domesticization are also just increasingly prominent.To alleviate above-mentioned technical problem, The present invention develops a kind of new modified plastic layer applied in electric battery with plastic case.
In above-mentioned modified plastics layer, SAN (Styrene Acrylonitrile) is that styrene-acrylonitrile is styrene-acrylonitrile copolymer The copolymer of nitrile, it has good mechanical strength, heat resistance and chemical stability, at present the notch impact strength of SAN resin For 1.26KJ/m2, tensile strength 50.53MPa, vicat softening temperature is 105.6 DEG C, melt index 14.21g/10min, If directly being applied the requirement for being not met by battery to battery case materials in battery case materials, thus need to SAN Resin carries out toughening modifying to meet battery to the performance requirement of battery case materials.
POE (Polyolefin elastomer) is polyolefin elastomer, be DOW chemical company, the U.S. with metallocene is to urge The thermoplastic elastomer (TPE) of agent being distributed with narrow molecular weight distribution and uniform short-chain branch.It is with good processing Processability, when molding, do not need to add any plasticiser, at the same also have excellent ageing-resistant, resistance to ozone, resistant to chemical media, The performances such as heat resistance, and it also has certain tensile strength and tearing strength.
Based on this, the present invention provides a kind of modified plastics layers, mainly by SAN, POE, compatilizer and optional auxiliary agent Composition carries out toughening modifying to SAN resin using POE as toughener, i.e. polymer made of POE and SAN are blended can make composite plastic Material has both the performance advantage of POE and SAN, and promotes POE and SAN blending by adding compatilizer, improves the phase of the two Capacitive enhances the performances such as the toughness, heat resistance, resistance to ag(e)ing of composite plastic, so that the packaging shell material has punching well Hit intensity and excellent barrier property.
Further, the present invention combines modified plastics layer with separation layer, i.e. the first modified plastics layer, separation layer and Two modified plastics layers are cascading, and the number of plies of the first modified plastics layer, the second modified plastics layer, separation layer can not It is restricted.In this way, by using high-intensitive, high performance plastics+high obstructing performance material+high intensity, the mode of high performance plastics Formed battery packages shell material, have certain intensity, good impact resistance, preferable heat resistance, lower water imbibition, compared with Good electrical insulating property and preferable corrosion resistance, can effectively prevent the leakage of electrolyte, guarantee the safety of battery, extend electricity The service life in pond, while greatly reducing the production cost of battery.
It is understood that above-mentioned " optional auxiliary agent " indicates: auxiliary agent can be added in the modified plastics layer, Do not add auxiliary agent.
In a preferred embodiment, the modified plastics layer includes following component according to parts by weight:
50~100 parts of SAN, 0.1~45 part of POE, 1~8 part of compatilizer and 0~1 part of auxiliary agent.
It is helped under the coordinated effect of above-mentioned raw materials using suitable and suitable SAN, POE, compatilizer and auxiliary agent In the impact resistance, intensity, processing performance, heat resistance, weatherability, corrosion resistance and the ageing-resistant performance that improve modified plastics layer Deng；The additive amount of compatilizer suitable simultaneously is also more conducive to improve compatibility of the POE in SAN, makes it have excellent comprehensive Close performance；And above-mentioned raw materials source is wide, is easy to get, low in cost, safety and environmental protection.
In the present invention, according to parts by weight, the typical but non-limiting content of SAN is 50 parts, 55 parts, 60 parts, 65 parts, 70 Part, 75 parts, 80 parts, 85 parts, 90 parts, 95 parts or 100 parts；The typical but non-limiting content of POE is 0.1 part, 1 part, 5 parts, 10 Part, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts or 45 parts；The typical but non-limiting content of compatilizer is 1 part, 2 parts, 3 Part, 4 parts, 5 parts, 6 parts, 7 parts or 8 parts；The typical but non-limiting content of auxiliary agent is 0 part, 0.05 part, 0.1 part, 0.15 part, 0.2 Part, 0.25 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.8 part or 1 part.
It should be noted that the present invention does not have the source of SAN, POE, compatilizer and auxiliary agent special limitation, use Each raw material well-known to those skilled in the art；Its commercial goods can be such as used, those skilled in the art can also be used Preparation method known to member is voluntarily prepared.
Preferably, the modified plastics layer includes following component according to parts by weight:
50~90 parts of SAN, 8~44 parts of POE, 2~6 parts of compatilizer and 0.05~0.3 part of auxiliary agent；
Preferably, the modified plastics layer includes following component according to parts by weight:
55~75 parts of SAN, 20~40 parts of POE, 3~5 parts of compatilizer and 0.1~0.2 part of auxiliary agent.
Typical but unrestricted, modified plastics layer includes following component according to parts by weight: 75 parts of SAN, POE 20 Part, 5 parts of compatilizer and 0.1 part of auxiliary agent；Alternatively, 65 parts of SAN, 30 parts of POE, 5 parts of compatilizer and 0.1 part of auxiliary agent；Alternatively, SAN 55 parts, 40 parts of POE, 5 parts of compatilizer and 0.1 part of auxiliary agent.
By advanced optimizing the content proportion relation of each material component, the heat resistance of modified plastics layer can further improve The performances such as energy, corrosion resistance, electrical insulating property and impact resistance, stability and intensity, can more be effectively prevented electrolyte Leakage, securely and reliably, long service life.
In a preferred embodiment, the separation layer include in plastics, metal, alloy or metal composite extremely Few one kind.
Separation layer of the invention primarily serves the effect of barrier, can use currently used aluminium, however with it is existing Using aluminium as unlike core layer in technology, separation layer aluminium of the invention only plays the role of auxiliary.Thus, this hair The bright specific material for separation layer does not do excessive limitation, can also use plastics, alloy using metals such as aluminiums Or metal composite, it can also be using other materials.
As long as plastics, metal, alloy, metal composite here to electrolyte stabilization and has certain vapor barrier Property, it appropriate can be chosen without special limitation.
Typical but unrestricted plastics are EVOH, PVDC, PLA, PA, HDPE, PE-RT or PE-X etc..
Typical but unrestricted metal is aluminium, magnesium, zinc, iron, nickel etc..
Alloy refers to the alloy that metal and other one or more of metals are formed；And metal composite refers to metal and other Nonmetallic materials combine and are formed by metal-base composites.
Typical but non-limiting alloy is including at least any in tin, aluminium, copper, iron, zinc, nickel, titanium, zirconium, chromium, manganese or magnesium A kind of alloy, as ferro-tin alloy, magnesium alloy, magnalium manganese alloy, chromium nickel system stainless steel, chrome stainless steel, 301 stainless steels, 304 stainless steels etc..
Typical but non-limiting metal composite is including at least tin, aluminium, copper, iron, zinc, nickel, titanium, zirconium, chromium, manganese or magnesium In any one metal composite, such as tin/graphene complex, nickel/Polyaniline etc..
From the angle of processability, the easness started with, price, intensity, corrosion resistance etc., above-mentioned separation layer is preferably adopted Be aluminize, stainless steel, EVOH or PVDC.Wherein EVOH is ethylene/vinyl alcohol copolymer, is a kind of high barrier material, Excellent blocking effect is showed to gas, smell, fragrance, solvent etc.；PVDC be polyvinylidene chloride be a kind of barrier property it is high, Toughness is strong and low-temperature heat-sealing, heat-shrinkable and the good material of chemical stability, have hinder wet, resistance oxygen, moisture-proof, acid and alkali-resistance, The performances such as resistance to oil immersion and resistant to many chemical solvent.
Preferably, chemical conversion processing is implemented at least one face of the separation layer.
The separation layer has two opposite surfaces, and the first modified plastics layer and the second modified plastics layer are respectively arranged at On two opposite surfaces of separation layer.
For stabilisation of the separation layer in conjunction with modified plastics layer, prevent from dissolving and further preventing corrosion etc., it is preferably right Face, the further preferred two sides of at least side of separation layer are subjected to chemical conversion processing.Wherein chemical conversion processing packet It includes and forms the processing of acid resistance overlay film or corrosion resistance overlay film on the surface of separation layer, so that at least one side of separation layer has chemistry Conversion processing layer, such as corrosion-proof layer etc..
Optionally, the surface of separation layer is equipped with the corrosion-proof layer constituted with conductive coating through hot setting.
It optionally, can be with are as follows: by being coated in as the chemical conversion processing method for assigning anticorrosive property to separation layer Film obtained from the particle of the metal oxides such as dispersed alumina, titanium oxide, tin oxide, barium sulfate in phosphoric acid, and through excessively high Temperature sintering, in the method that the surface of separation layer forms corrosion-proof layer.
Chemical conversion processing can be carried out by the methods of stick coating method, rolling method, gravure coating method, infusion process.
In a preferred embodiment, the compatilizer is maleic anhydride graft compatilizer；
Preferably, the compatilizer includes at least one of PP-g-MAH, POE-g-MAH or PE-g-MAH；
Preferably, the compatilizer is PE-g-MAH；
Preferably, the grafting rate of the PE-g-MAH is 1.0%~2.2%, preferably 1.2%~2.0%, further Preferably 1.5%~1.8%.
Making the macromolecule mixture of SAN and POE has excellent mechanical performance and physical property, it is necessary to guarantee mixing Each component has good compatibility in object, and entire mixture polymer is with good stability.If each component in mixture Poor compatibility, different component only have slight dissolubility, have very big surface stress between combination, polymer is at this time Nonequilibrium condition, material prepared therefrom have poor mechanical performance.Therefore, to increase the compatibility between component, make it It is with good stability, various mechanical performances and processing performance of material etc. are improved, the present invention selects in the modified plastics Suitable compatilizer.
Found through a large amount of development test, maleic anhydride (MAH) be grafted compatilizer can significantly more efficient increases SAN with The compatibility of POE, while also can increase the weatherability and toughness of polymer.In particular by PE-g-MAH as compatilizer When, it can more promote the excellent compatibility of SAN and POE, keep material with good stability, improve the various mechanicalnesses of material Energy and processing performance etc..In addition, the height of compatilizer grafting rate is also one of the key for determining polymer blend compatibility, it is suitable for Compatilizer grafting rate compatibility and heat resistance, the weatherability and corrosion resistance of polymer blend can be improved.The present invention In, the grafting rate of PE-g-MAH it is typical but unrestricted can for 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1% or 2.2%.The grafting rate of PE-g-MAH within the above range, Help to improve the various mechanical properties etc. of modified plastics.
In a preferred embodiment, the auxiliary agent includes antioxidant.
What the auxiliary agent in modified plastics of the invention preferably added is antioxidant, and the antioxidant includes but is not limited to antioxygen Agent 1010, irgasfos 168, antioxidant 619F, antioxidant 1076, antioxidant 626, antioxidant 702, antioxidant 1171, antioxidant One or more kinds of mixture in BHT or anti-oxidant DLTP.Certainly, the auxiliary agent can also include its commonly used in the art Auxiliary agent of his type, such as antistatic agent, stabilizer, fire retardant, pigment, filler, reinforcing agent and subtle inorganic compound etc..
The assistant types of addition are not particularly limited in the present invention, and above-mentioned auxiliary agent can be used alone, can also be with It is used in combination of two or more, the additive amount of auxiliary agent is micro (0.1phr or so).
In a preferred embodiment, the number of plies of the first modified plastics layer and the second modified plastics layer is respectively only It is on the spot 1~20 layer, preferably 1~12 layer.For example, the number of plies of the first modified plastics layer it is typical but it is unrestricted for 1,2,3,4, 5,6,7,8,9,10,11,12,14,15,16,18 or 20；The number of plies of second modified plastics layer it is typical but it is unrestricted for 1,2,3, 4,5,6,7,8,9,10,11,12,14,15,16,18 or 20.
In currently used battery packaging material, the number of plies of each material is usually 1-5 layers, and packaging shell material of the invention Material can be set to the modified plastics layer and separation layer of more layers, and the number of plies can reach 10 layers or more even more multilayers, and when total The number of plies entirely packs that shell material is still with good performance at 10 layers or more, can guarantee the whole electrochemistry of battery Energy；Application flexibility is more preferable, and practicability is stronger.
In a preferred embodiment, there is adhesive layer between the first modified plastics layer and separation layer；With/ Or,
There is adhesive layer between the second modified plastics layer and the separation layer.
It, can also be to improve him between the first modified plastics layer and separation layer in battery packages shell material of the invention Between cementability for the purpose of adhesive layer is set as needed；In addition, between the second modified plastics layer and separation layer, Adhesive layer can be set as needed for the purpose of improving the cementability between them.For the thickness of adhesive layer, such as can Think 2 μm or more 40 μm hereinafter, preferably 3 μm or more 20 μm or less.
It is understood that above-mentioned adhesive layer can be set or be not provided with, it is for modified plastics layer and separation layer In conjunction with and the layer that is set as needed.Bonding mechanism for being used to form the bonding agent of adhesive layer is also not particularly limited, and is changed Learn any ways such as response type, solvent volatile-type, hot-melt type, hot pressing type.
In a preferred embodiment, the first modified plastics layer with a thickness of 10~150 μm, preferably 20~ 100 μm, further preferably 30~60 μm；
Preferably, the separation layer with a thickness of 5~100 μm, preferably 10~80 μm, further preferably 20~40 μ m；
Preferably, the second modified plastics layer with a thickness of 10~150 μm, preferably 20~100 μm, further preferably It is 30~60 μm.
Preferably, the overall thickness of modified plastics layer and separation layer be 100~200 μm, preferably 120~190 μm, further Preferably 150~180 μm.
Modified plastics layer and separation layer in above-mentioned thickness range can assign the sufficient machine of battery packages shell material Tool intensity can mention the durability of battery when using batteries such as secondary cells；It is adequately drawn furthermore it is also possible to assign it Stretch processability.
The first modified plastics layer, separation layer and the second modified plastics layer in the present invention can be one or more material shapes At single or multi-layer structure, thickness can according to practical application request be adapted setting.
Preferably, the battery packages shell material is the packaging material of secondary cell.
In optional embodiment of the invention, the battery packages shell material can also include sealant layer, peeling agent layer and Protective layer, peeling agent layer therein and protective layer successively from top to bottom mutually post, and change positioned at the first modified plastics layer or second The outside of property plastic layer.By the setting of these above-mentioned auxiliary layers, the appearance of battery packages shell material, leakproofness, absolutely can be improved Edge shielding etc..
Second aspect provides a kind of battery case at least one embodiment, has the inner space of storage battery, adopts It is prepared with above-mentioned battery packages shell material.
The form of battery case provided by the present invention is not particularly limited, it is commonly used in the art, such as button, The forms such as tabular, cylindric.
Optionally, which has shell and the interposer for accommodating each battery.
The battery case and aforementioned battery packages shell material are that based on the same inventive concept, thus the battery case is at least Institute with aforementioned battery packages shell material is effective, and details are not described herein.
The third aspect provides a kind of preparation method of battery case at least one embodiment, by extrusion molding or The method of injection molding is prepared；Or,
The method that the first modified plastics layer and the second modified plastics layer is respectively coated by two faces in the separation layer It is prepared.
Excessive restriction is not done for the preparation method of the battery case, using extrusion molding commonly used in the art or note It is moulded into the modes such as type.
The preparation method is simple, and productivity effect is high, without complicated device systems, low for equipment requirements, work easy to accomplish Industryization large-scale production, it is industrially applicable.
The mode of above-mentioned " coating " includes but is not limited to dip-coating, spraying, showering, roller coating or spin coating.
Preferably, the preparation method of the modified plastics layer includes:
It will be mixed after SAN, POE, compatilizer and optional auxiliary agent drying, after extrusion, granulation, cooling, pelletizing and drying Injection molding obtains modified plastics layer.
Further, it will be mixed after SAN, POE of formula ratio, compatilizer and optional auxiliary agent drying with high-speed mixer, Then squeeze out, be granulated through double screw extruder, it is cooling after through traction, pelletizing and it is dry after be added to NG120-A plastic injection at In type machine, modified plastics layer is obtained.
Fourth aspect provides a kind of battery at least one embodiment, has the battery case, anode, cathode And electrolyte.
It is understood that anode, cathode and the electrolyte in the battery are not particularly limited, this field can be used The common anode of battery, cathode and electrolyte.The assembling mode of battery is not particularly limited, using conventional battery pack Dress technique is assembled.
Since the battery has above-mentioned battery case, and then battery is promoted with high barrier property, lower water suction Property, excellent electrolyte resistance stability, heat resistance, electrical insulating property and corrosivity etc., ensure that the safety of battery, extend electricity The service life in pond.
Combined with specific embodiments below and comparative example, the invention will be further described.
Embodiment 1
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading, and the thickness of each layer is followed successively by 50 μm, 20 μm and 50 μm, the number of plies of each layer is 1 layer；
Wherein, modified plastics layer includes following component according to parts by weight:
75 parts of SAN, 20 parts, PE-g-MAH5 parts and 0.1 part of antioxidant of POE；The grafting rate of PE-g-MAH is 1.2%；
Separation layer is to aluminize.
Embodiment 2
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading, and the thickness of each layer is followed successively by 60 μm, 15 μm and 40 μm, the number of plies of each layer is 1 layer；
Wherein, modified plastics layer includes following component according to parts by weight:
65 parts of SAN, 30 parts, PE-g-MAH5 parts and 0.1 part of antioxidant of POE；The grafting rate of PE-g-MAH is 1.2%；
Separation layer is to aluminize.
Embodiment 3
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading, and the thickness of each layer is followed successively by 30 μm, 10 μm and 50 μm, the number of plies of each layer is 1 layer；
Wherein, modified plastics layer includes following component according to parts by weight:
55 parts of SAN, 40 parts, PE-g-MAH5 parts and 0.1 part of antioxidant of POE；The grafting rate of PE-g-MAH is 1.2%；
Separation layer is stainless steel.
Embodiment 4
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading, and the thickness of each layer is followed successively by 60 μm, 28 μm and 60 μm, the number of plies of each layer is 1 layer；
Wherein, modified plastics layer includes following component according to parts by weight:
80 parts of SAN, 12 parts of POE, 8 parts of PE-g-MAH and 0.15 part of antioxidant；The grafting rate of PE-g-MAH is 1.2%；
Separation layer is stainless steel.
Embodiment 5
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, separation layer between the first modified plastics layer and the second modified plastics layer, the first modified plastics layer, separation layer and The thickness of second modified plastics layer is followed successively by 50 μm, 10 μm and 30 μm, and the number of plies of each layer is respectively 1 layer, 2 layers and 2 layers；
Remaining is same as Example 1.
Embodiment 6
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading, and the thickness of each layer is followed successively by 20 μm, 15 μm and 20 μm, the number of plies of each layer is respectively 5 layers, 1 layer and 5 layers；
Remaining is same as Example 2.
Embodiment 7
A kind of battery packages shell material, including separation layer and changing comprising the first modified plastics layer and the second modified plastics layer Property plastic layer, separation layer between the first modified plastics layer and the second modified plastics layer, the first modified plastics layer, separation layer and The thickness of second modified plastics layer is followed successively by 40 μm, 9 μm and 21 μm, and the number of plies of each layer is respectively 2 layers, 4 layers and 3 layers；
Remaining is same as Example 3.
Embodiment 8-9
A kind of battery packages shell material, the difference with embodiment 1 are only that:
The grafting rate of PE-g-MAH is respectively 1.5% and 1.8%.
Embodiment 10
A kind of battery packages shell material, the difference with embodiment 1 are only that:
PE-g-MAH is replaced with into POE-g-MAH, the grafting rate of POE-g-MAH is 1.5%.
Embodiment 11-12
A kind of battery packages shell material, the difference with embodiment 1 are only that:
Separation layer is respectively EVOH and PVDC.
Embodiment 13
A kind of battery packages shell material, the difference with embodiment 1 are only that:
Corrosion-protected surface processing is applied with for two faces that separation layer is aluminized.
Embodiment 14
A kind of battery packages shell material, the difference with embodiment 1 are only that:
There is adhesive layer between first modified plastics layer and separation layer, have between the second modified plastics layer and separation layer viscous Connect layer.
Embodiment 15
A kind of battery packages shell material, the difference with embodiment 1 are only that:
Modified plastics layer includes following component according to parts by weight:
60 parts of SAN, 32 parts of POE, 7 parts of PE-g-MAH, 0.1 part of antioxidant, 0.05 part of antistatic agent and fire retardant 0.05 part.
The battery external package casing being prepared using the battery packages shell material in embodiment 1-15, can be by squeezing The method of molding or injection molding is prepared out.
Wherein, the preparation method of modified plastics layer includes: to use after drying the SAN, POE, compatilizer and auxiliary agent of formula ratio Then high-speed mixer mixing is squeezed out through double screw extruder, is granulated, be added to after traction, pelletizing and drying after cooling In NG120-A plastic injection molding machine, modified plastics layer is obtained.
Comparative example 1
A kind of battery packages shell material, the difference from embodiment 1 is that modified plastics layer:
Modified plastics layer includes following component according to parts by weight: 48 parts of SAN, 46 parts of POE, 15 parts of compatilizer and anti- 0.1 part of oxygen agent；
In this comparative example, the main matter content in modified plastics layer is not in range provided by the present invention.
Comparative example 2
A kind of battery packages shell material, the difference from embodiment 1 is that modified plastics layer:
Modified plastics layer includes following component according to parts by weight: 65 parts of SAN, POE 35 and 0.1 part of antioxidant；
Compatilizer PE-g-MAH is omitted in the modified plastics layer of this comparative example.
Comparative example 3
A kind of battery packages shell material, the difference from embodiment 1 is that modified plastics layer；
The grafting rate of compatilizer PE-g-MAH is 0.8% in the modified plastics layer of this comparative example.
Comparative example 4
A kind of battery packages shell material, the difference from embodiment 1 is that modified plastics layer；
Modified plastics layer in this comparative example is using ABS plastic in the prior art.
Comparative example 5
A kind of battery packages shell material, the difference from embodiment 1 is that modified plastics layer；
Modified plastics layer in this comparative example is using PP plastics in the prior art.
Performance test
Respectively to the battery packages shell material in embodiment 1-15 and comparative example 1-5 carried out relevant tensile strength, The test such as impact strength, heat seal strength performance, the performance test results are as shown in table 1.
1 the performance test results of table
Heat seal strength test method therein are as follows: by the modified plastics layer of sample to separation layer according to encapsulation 180 DEG C of * of condition 4sec*0.6MP is sealed, and then tests Bonding strength (N/15mm) with tensile testing machine, this item test assessment sample heat-sealing Intensity, heat seal strength is higher, and electrolyte more will not leak outside.The test method of peel strength are as follows: sample is cut into 15mm wide small pieces and is put Enter in electrolyte, electrolyte composition is (EC:DEC=1:1,1M LiPF6), it is closed at 85 DEG C to impregnate 4 hours, assess modified modeling Peel strength between the bed of material and separation layer.
In addition, also having carried out vapor water barriers performance, oxygen blocking to the battery packages shell material of each embodiment and comparative example The correlated performance test of separating performance and anti-electrolyte property etc., test result are as shown in table 2.
2 the performance test results of table
The test method of electrolyte resistance therein are as follows: soak 85 DEG C electrolyte 7 days according to the sample that GB8808-88 is measured Electrolyte resistance afterwards.The appraisal procedure of package are as follows: inject a sample into electrolyte (EC:DEC=1:1,1M LiPF6), heat-sealing It saves one month afterwards, whether there is or not electrolyte leakages for confirmation.
Battery packages shell material of the invention has certain intensity, good impact resistance it can be seen from Tables 1 and 2 Property, vapor water barriers performance with higher and oxygen barrier property, and can effective electrolyte leakage, guarantee the safety of battery Property, excellent combination property.And pass through the comparative analysis of embodiment and comparative example part it can also be seen that changing each group in modified plastics layer The content divided keeps it not within the scope of the present invention, perhaps omits any component therein or uses the prior art In the materials such as common ABS plastic, the performance of battery packages shell material can declined, electrolyte resistance performance etc. is poor.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of battery packages shell material, which is characterized in that be modified including separation layer and comprising the first modified plastics layer and second The modified plastics layer of plastic layer, the first modified plastics layer, separation layer and the second modified plastics layer are cascading；
The modified plastics layer includes following component: SAN, POE, compatilizer and optional auxiliary agent.
2. battery packages shell material according to claim 1, which is characterized in that the modified plastics layer includes by weight The following component of number meter:
SAN50~100 part, POE0.1~45 part, 1~8 part of compatilizer and 0~1 part of auxiliary agent；
Preferably, the modified plastics layer includes following component according to parts by weight:
SAN50~90 part, POE8~44 part, 2~6 parts of compatilizer and 0.05~0.3 part of auxiliary agent；
Preferably, the modified plastics layer includes following component according to parts by weight:
SAN55~75 part, POE20~40 part, 3~5 parts of compatilizer and 0.1~0.2 part of auxiliary agent.
3. battery packages shell material according to claim 1 or 2, which is characterized in that the separation layer includes plastics, gold At least one of category, alloy or metal composite；
Preferably, the separation layer by aluminizing, stainless steel, in EVOH, PVDC, PLA, PA, HDPE, PE-RT or PE-X extremely A kind of few formation；Or,
The separation layer is by the alloy shape including at least any one in tin, aluminium, copper, iron, zinc, nickel, titanium, zirconium, chromium, manganese or magnesium At；Or,
The separation layer is the metal composite including at least any one in tin, aluminium, copper, iron, zinc, nickel, titanium, zirconium, chromium, manganese or magnesium Object is formed；
Preferably, chemical conversion processing is implemented at least one face of the separation layer.
4. battery packages shell material according to claim 1 or 2, which is characterized in that the compatilizer connects for maleic anhydride Branch compatilizer；
Preferably, the compatilizer includes at least one of PP-g-MAH, POE-g-MAH or PE-g-MAH；
Preferably, the compatilizer is PE-g-MAH；
Preferably, the grafting rate of the PE-g-MAH is 1.0%~2.2%, preferably 1.2%~2.0%, further preferably It is 1.5%~1.8%.
5. battery packages shell material according to claim 1 or 2, which is characterized in that the auxiliary agent includes antioxidant.
6. battery packages shell material according to claim 1 or 2, which is characterized in that the first modified plastics layer and The number of plies of two modified plastics layers is each independently 1~20 layer, preferably 1~12 layer.
7. battery packages shell material according to claim 1 or 2, which is characterized in that the first modified plastics layer and every There is adhesive layer between absciss layer；And/or
There is adhesive layer between the second modified plastics layer and the separation layer；
Preferably, the first modified plastics layer with a thickness of 10~150 μm；
Preferably, the separation layer with a thickness of 5~100 μm；
Preferably, the second modified plastics layer with a thickness of 10~150 μm.
8. a kind of battery case has the inner space of storage battery, which is characterized in that using any one of claim 1~7 institute The battery packages shell material stated is prepared.
9. the preparation method of battery case as claimed in claim 8, which is characterized in that pass through extrusion molding or injection molding Method is prepared；Or,
The method preparation of the first modified plastics layer and the second modified plastics layer is respectively coated by two faces in the separation layer It obtains；
Preferably, the preparation method of the modified plastics layer includes:
It will mix after SAN, POE, compatilizer and optional auxiliary agent drying, be molded after extrusion, granulation, cooling, pelletizing and drying Molding, obtains modified plastics layer.
10. a kind of battery, which is characterized in that have battery case according to any one of claims 8, anode, cathode and electrolyte.
CN201810356939.XA 2018-04-19 2018-04-19 Battery packages shell material, battery case, preparation method and battery Pending CN110387090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810356939.XA CN110387090A (en) 2018-04-19 2018-04-19 Battery packages shell material, battery case, preparation method and battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810356939.XA CN110387090A (en) 2018-04-19 2018-04-19 Battery packages shell material, battery case, preparation method and battery

Publications (1)

Publication Number Publication Date
CN110387090A true CN110387090A (en) 2019-10-29

Family

ID=68284117

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810356939.XA Pending CN110387090A (en) 2018-04-19 2018-04-19 Battery packages shell material, battery case, preparation method and battery

Country Status (1)

Country Link
CN (1) CN110387090A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112159576A (en) * 2020-09-11 2021-01-01 杨童羽 Novel battery pack box body and manufacturing method
WO2021108994A1 (en) * 2019-12-03 2021-06-10 宁德时代新能源科技股份有限公司 Secondary battery and device containing same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101350398A (en) * 2008-08-20 2009-01-21 沈道付 Packaging film for lithium ionic cell and manufacturing method thereof
CN201243029Y (en) * 2008-06-20 2009-05-20 Tcl集团股份有限公司 Lithium ion power cell case
CN103450583A (en) * 2012-05-29 2013-12-18 广州市番禺区好友实业有限公司 Abrasion-scratch resistant AS modified plastic
CN107154468A (en) * 2016-03-04 2017-09-12 谢彦君 Battery packaging material, soft-package battery and battery heat control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201243029Y (en) * 2008-06-20 2009-05-20 Tcl集团股份有限公司 Lithium ion power cell case
CN101350398A (en) * 2008-08-20 2009-01-21 沈道付 Packaging film for lithium ionic cell and manufacturing method thereof
CN103450583A (en) * 2012-05-29 2013-12-18 广州市番禺区好友实业有限公司 Abrasion-scratch resistant AS modified plastic
CN107154468A (en) * 2016-03-04 2017-09-12 谢彦君 Battery packaging material, soft-package battery and battery heat control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021108994A1 (en) * 2019-12-03 2021-06-10 宁德时代新能源科技股份有限公司 Secondary battery and device containing same
CN112159576A (en) * 2020-09-11 2021-01-01 杨童羽 Novel battery pack box body and manufacturing method

Similar Documents

Publication Publication Date Title
CN102782027B (en) Polypropylene-based resin perforated membrane, battery separator and battery
CN103131085B (en) A kind of high tenacity environment-friendly flame-proof polypropylene material and preparation method thereof and application
CN103066141B (en) Modified polypropylene resin composition and solar energy rear panel made of the same
CN102585378B (en) High heat resistant glass fiber enhanced halogen-free flame retardant polypropylene and preparation method thereof
WO2010002006A1 (en) Sodium secondary battery
CN110387090A (en) Battery packages shell material, battery case, preparation method and battery
CN103057228B (en) Composition of solar energy backboard and preparation method thereof
CN109486473A (en) A kind of multi-functional phase change composite material and preparation method thereof
CN106279949A (en) A kind of polyethylene polypropylene macromolecule composite flame-proof waterproof roll
CN104241556A (en) Flexible package aluminum-plastic film material for lithium battery
CN108808037A (en) Fuel battery double plates, fuel cell, fuel battery engines and electric vehicle
CN109370481A (en) Poly-lithium battery flexible packaging film adhering resin and preparation method
CN106543551A (en) A kind of lithium ion battery plastic casing, lithium ion battery and its manufacture method
CN110305440A (en) A kind of environment-friendly flame-resistant ABS composite material and preparation method
CN110391359A (en) Battery housing material, battery external package casing, preparation method and battery
CN110391360A (en) Battery packages shell material, battery case, preparation method and battery
CN205467718U (en) Soft packaging material of lithium ion battery and use lithium ion battery of this material
CN110391362A (en) Battery housing material, battery external package casing, preparation method and battery
CN107880474A (en) A kind of antibacterial PA/ABS compounds and preparation method and application
CN107033434A (en) High intensity antistatic pipes and preparation method thereof
CN103832034A (en) Three-layer-structured PET (polythylene terephthalate) composite membrane for packaging photovoltaic module and preparation method of three-layer-structured PET composite membrane
CN208722927U (en) Battery external package casing and battery
CN103400946B (en) Special flexible packaging film for lithium-ion power battery and energy storage lithium battery and preparation method thereof
CN108676309A (en) A kind of new energy car battery shell special-purpose anti-flaming ASA materials and preparation method thereof
CN107501929A (en) A kind of alkaline battery PA sealing rings of high thermal stability and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20191029