CN103811686B - A kind of lithium ion battery core packing film and lithium ion battery - Google Patents
A kind of lithium ion battery core packing film and lithium ion battery Download PDFInfo
- Publication number
- CN103811686B CN103811686B CN201410067107.8A CN201410067107A CN103811686B CN 103811686 B CN103811686 B CN 103811686B CN 201410067107 A CN201410067107 A CN 201410067107A CN 103811686 B CN103811686 B CN 103811686B
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- CN
- China
- Prior art keywords
- layer
- packing film
- battery
- battery core
- core packing
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
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- 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
- B32B15/085—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 polyolefins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of lithium ion battery core packing film and lithium ion battery.Wherein, battery core packing film comprises the separator, aluminium foil layer and the adhesive layer that set gradually, is provided with protective layer between aluminium foil layer and adhesive layer, and wherein, protective layer is thermoset plastic layer.By the way, the present invention can avoid that the corrosive liquids of battery is infiltrated by adhesive layer and corrosive aluminum foil layer is surperficial, guarantees that the adhesive layer on aluminium foil layer surface does not come off, battery no leakage, improves the useful life of packaging film.
Description
Technical field
The present invention relates to field of batteries, particularly relate to a kind of lithium ion battery core packing film and lithium ion battery.
Background technology
In use easily discharge gas for metal current shell packaging lithium ion battery, pressure increase causes explosion issues, starts on the market to release a kind of novel flexible packing material, i.e. aluminum plastic film.This packaging material can expand release pressure, thus prevent blast.
As shown in Figure 1, in prior art, flexible packing material generally includes separator 1, aluminium foil layer 2 and adhesive layer 3.But, such flexible packing material, the corrosive electrolyte of lithium battery can be infiltrated by adhesive layer 3 usually and directly etching aluminium foil layer is surperficial, thus the adhesive layer being attached to aluminium foil layer surface is come off, and packaging film lost efficacy, thus battery failure.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of lithium ion battery core packing film and lithium ion battery, effectively can prevent the corrosive liquids corrosive aluminum foil layer surface of battery, guarantee that the adhesive layer on aluminium foil layer surface does not come off, battery no leakage, improve the useful life of packaging film.
For solving the problems of the technologies described above; the technical scheme that the present invention adopts is: provide a kind of lithium ion battery core packing film; described battery core packing film comprises the separator, aluminium foil layer and the adhesive layer that set gradually; protective layer is provided with between described aluminium foil layer and described adhesive layer; wherein, described protective layer is thermoset plastic layer.
Wherein, described thermoset plastic layer is polyene acid layer.
Wherein, described thermoset plastic layer is polypropylene acid layer.
Wherein, the thickness of described protective layer is between 1 ~ 10 micron.
Wherein, the thickness of described protective layer is between 3 ~ 6 microns.
Wherein, in half crosslinking condition after described thermoset plastic layer solidifies, there is after solidification the elongation of 5% ~ 50%.
Wherein, described battery core packing film is by cold-punching molding or the coated battery of straight forming.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of lithium ion battery, the battery core packing film that described battery is above-mentioned and battery, by the coated described battery of described battery core packing film, the adhesive layer of described battery core packing film is closest to described battery and and electrolyte contacts.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention by arranging protective layer between the aluminium foil layer and adhesive layer of battery core packing film, and protective layer is thermoset plastic layer.Thus can avoid that the corrosive liquids of battery is infiltrated by adhesive layer and corrosive aluminum foil layer is surperficial, guarantee that the adhesive layer on aluminium foil layer surface does not come off, battery no leakage, improve the useful life of packaging film.
Accompanying drawing explanation
Fig. 1 is the structural representation of battery core packing film in prior art;
Fig. 2 is the structural representation of a kind of battery core packing film that embodiment of the present invention provides.
Embodiment
Refer to Fig. 2; Fig. 2 is the structural representation of a kind of battery core packing film that embodiment of the present invention provides; the battery core packing film that embodiment of the present invention provides comprises the separator 1, aluminium foil layer 2 and the adhesive layer 3 that set gradually; wherein; protective layer 4 is provided with between aluminium foil layer 2 and adhesive layer 3; wherein, protective layer 4 is thermoset plastic layer.
Wherein, the THICKNESS CONTROL of protective layer 4 is between 0.01 ~ 10 micron, is namely more than or equal to 0.01 micron to being less than or equal to 10 microns, such as 0.01 micron, 0.1 micron, 3 microns, 8 microns etc.Preferably, the THICKNESS CONTROL of protective layer 4 is between 0.1 ~ 6 micron, is namely more than or equal to 0.1 micron and is less than or equal to 6 microns, such as 0.2 micron, 0.5 micron, 6 microns etc.
Wherein, thermoset plastic layer is polyene acid layer, such as polypropylene acid layer, polybutene acid layer and composition thereof etc.Wherein, being preferably polyacrylic acid is main stor(e)y.
In actual application, the thermoset plastic material that different molecular formula can be adopted to distribute or dissimilar thermoset plastic material are allocated, make this thermoset plastic layer reach a kind of half cross-linked state, the stretching demand of packaging film can be met, do not affect again the performance requirement of packaging film.So-called half cross-linked state refers to a kind of state between consolidate-moulding, both not exclusively crosslinked, also not exclusively plastifies.The formation of this half crosslinking condition, can also by carrying out high temperature Cooling Mode to have assisted to the aluminium foil scribbling heat curing-type polyolefin acid.
By roller coating or painting way, thermoplastic plastic's material can be coated in aluminium foil layer surface in the embodiment of the present invention, and adopt quick high-temp curing technology, by it curing cross-linked on aluminium foil layer, using as protective layer.Relative to common thermosetting, curing of the present invention, can make thermoset plastic layer after thermosetting, have certain plasticity, can resistance to cold stamping.
The packaging film that the embodiment of the present invention provides, tensile property can reach between 5% ~ 50%, does not also affect performance.
The battery core packing film that present embodiment provides, it can pass through cold-punching molding or the coated battery of straight forming.Wherein, cold-punching molding refers to after prepared by packaging film, by the mode of punching press, packaging film is struck out given shape for carrying battery.Such as pit shape.And straight forming refers to and battery is directly placed on packaging film, by packaging film by cell core.
The lithium ion battery core packing film that embodiment of the present invention provides, is provided with protective layer between the adhesive layer and aluminium foil layer of battery core packing film, and protective layer is thermoset plastic layer.In the prior art, the manufacture craft due to packaging film requires and performance limits, and is selected to the large difficult point of one in flexible packing lithium ion battery R&D process to protective layer material.Present invention applicant determines through studying for a long period of time to adopt thermoset plastic layer as protective layer material; it effectively can avoid that the corrosive liquids of battery is infiltrated by adhesive layer and corrosive aluminum foil layer is surperficial; guarantee that the adhesive layer on aluminium foil layer surface does not come off; battery no leakage, improves the useful life of packaging film.Simultaneously; selecting thermoset plastic as protective layer material, also can adapt to technological requirement and the performance requirement of lithium ion battery core packing film, is half crosslinking condition during the solidification of this thermoset plastic layer; there is after solidification the elongation of 5% ~ 50%, meet the stamping forming needs of packaging film in battery manufacturing process.
Preferred as one, control the thickness of separator 1 in present embodiment between 20 ~ 30 microns, the thickness of aluminium foil layer 2 is between 30 ~ 90 microns, and the thickness of adhesive layer 3 is between 30 ~ 50 microns.
In the present embodiment, when protective layer heat curing-type polyolefin acid be complete cure states or cure states proportion excessive time, the easy embrittlement of protective layer, thus be unfavorable for lithium ion battery produce in by the enforcement of packaging film cold-punching molding technique.What the present invention adopted is semi-solid preparation polyolefin acid, namely also has the extensibility of 5% ~ 50% after solidification, thus meet the existing anti-electrolytic corrosion well of packaging film, having again can the requirement of cold-punching molding characteristic.
The lithium ion battery core packing film that embodiment of the present invention provides, may be used for packing compact power, as battery of mobile phone, also may be used for packing electrical source of power, as lithium batteries such as electric automobile, electric motor car, electric tools.
On the basis of the battery core packing film provided in embodiment of the present invention, embodiment of the present invention provides a kind of battery further, battery core packing film in the above-mentioned execution mode of this battery and battery, by the coated battery of battery core packing film, wherein, the adhesive layer of battery core packing film closest to battery, and contacts with electrolyte.
Wherein, the battery that embodiment of the present invention provides can be lithium ion battery, solid state lithium battery etc.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a lithium ion battery core packing film; it is characterized in that; described battery core packing film comprises the separator, aluminium foil layer and the adhesive layer that set gradually; protective layer is provided with between described aluminium foil layer and described adhesive layer; wherein; described protective layer is thermoset plastic layer, in half crosslinking condition after described thermoset plastic layer solidifies, has the elongation of 5% ~ 50% after solidification.
2. battery core packing film according to claim 1, is characterized in that, described thermoset plastic layer is polyene acid layer.
3. battery core packing film according to claim 2, is characterized in that, described thermoset plastic layer is polypropylene acid layer.
4. battery core packing film according to claim 1, is characterized in that, the thickness of described protective layer is between 1 ~ 10 micron.
5. battery core packing film according to claim 4, is characterized in that, the thickness of described protective layer is between 3 ~ 6 microns.
6. battery core packing film according to claim 1, is characterized in that, described battery core packing film is by cold-punching molding or the coated battery of straight forming.
7. a lithium ion battery, it is characterized in that, battery core packing film described in described any one of battery claim 1-6 and battery, by the coated described battery of described battery core packing film, the adhesive layer of described battery core packing film is closest to described battery and contact with electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067107.8A CN103811686B (en) | 2014-02-26 | 2014-02-26 | A kind of lithium ion battery core packing film and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067107.8A CN103811686B (en) | 2014-02-26 | 2014-02-26 | A kind of lithium ion battery core packing film and lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103811686A CN103811686A (en) | 2014-05-21 |
| CN103811686B true CN103811686B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410067107.8A Active CN103811686B (en) | 2014-02-26 | 2014-02-26 | A kind of lithium ion battery core packing film and lithium ion battery |
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| CN (1) | CN103811686B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0975031B2 (en) * | 1998-02-05 | 2011-11-02 | Dai Nippon Printing Co., Ltd. | Sheet for cell case and cell device |
| JP3845273B2 (en) * | 2000-10-13 | 2006-11-15 | 昭和電工パッケージング株式会社 | Electronic parts case packaging |
| CN2598153Y (en) * | 2003-01-07 | 2004-01-07 | 连云港中金医药包装有限公司 | Aluminium-plastic composite film for battery explosion-proof |
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| CN103811686A (en) | 2014-05-21 |
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Address after: Huaian leoch 211600 city of Jiangsu province Jinhu County Road No. 73 building fourth layer Patentee after: JIANGSU ANBO RUIXIN MATERIAL CO., LTD. Address before: Huaian leoch 211600 city of Jiangsu province Jinhu County Road No. 73 building fourth layer Patentee before: JIANGSU ANBO RUIXIN MATERIAL CO., LTD. |
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Effective date of registration: 20161201 Address after: Shenzhen Nanshan District City, Guangdong province 518000 Liuxian Avenue North 1306 Southland Belvedere Garden Building K1401 room 4 Patentee after: Shi Baoqing Address before: Huaian leoch 211600 city of Jiangsu province Jinhu County Road No. 73 building fourth layer Patentee before: JIANGSU ANBO RUIXIN MATERIAL CO., LTD. |
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Effective date of registration: 20170511 Address after: 518000, No. 1, Tai Po River, first industrial district, Gongming street, Guangming District, Guangdong, Shenzhen Patentee after: Shenzhen City bri new and Mstar Technology Ltd Address before: Shenzhen Nanshan District City, Guangdong province 518000 Liuxian Avenue North 1306 Southland Belvedere Garden Building K1401 room 4 Patentee before: Shi Baoqing |