CN103824978B - A kind of battery core packing film and battery - Google Patents
A kind of battery core packing film and battery Download PDFInfo
- Publication number
- CN103824978B CN103824978B CN201410068244.3A CN201410068244A CN103824978B CN 103824978 B CN103824978 B CN 103824978B CN 201410068244 A CN201410068244 A CN 201410068244A CN 103824978 B CN103824978 B CN 103824978B
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- China
- Prior art keywords
- battery
- layer
- packing film
- core packing
- battery core
- 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.)
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- 238000012856 packing Methods 0.000 title claims abstract description 39
- 239000010410 layer Substances 0.000 claims abstract description 54
- 239000005030 aluminium foil Substances 0.000 claims abstract description 29
- 239000012790 adhesive layer Substances 0.000 claims abstract description 26
- 239000011241 protective layer Substances 0.000 claims abstract description 23
- 239000003792 electrolyte Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 22
- 239000005033 polyvinylidene chloride Substances 0.000 claims description 22
- 238000004080 punching Methods 0.000 claims description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 4
- 229920000126 latex Polymers 0.000 claims description 4
- 229910001416 lithium ion Inorganic materials 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 2
- 238000004260 weight control Methods 0.000 claims description 2
- 239000012785 packaging film Substances 0.000 abstract description 20
- 229920006280 packaging film Polymers 0.000 abstract description 20
- 239000004033 plastic Substances 0.000 abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- -1 and wherein Substances 0.000 abstract description 4
- 239000011888 foil Substances 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000001052 transient effect Effects 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings 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
- 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
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a kind of battery core packing film and 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 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; Avoid electrolyte to infiltrate the rotten of the electrolyte caused with each layer of corrosion packaging film, ensure the performance of battery; Stop the micro-delamination of battery at the heat-sealing battery electrode place that transient large current discharge causes and micropore permeation.
Description
Technical field
The present invention relates to field of batteries, particularly relate to a kind of battery core packing film and battery.
Background technology
In use easily discharge gas for metal current box packaging lithium 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.Battery packs battery core with packaging film in process of production, and by the both positive and negative polarity of heat-sealing extraction two metal pole piece as battery.But, such flexible packing material, has following shortcoming: 1. the corrosive liquids of lithium battery can be infiltrated by adhesive layer 3 and directly etching aluminium foil layer is surperficial usually, thus the adhesive layer being attached to aluminium foil layer surface is come off, packaging film lost efficacy, thus battery failure.2. adhesive layer is generally polypropylene, and adopt film mode polypropylene to be salivated aluminium foil surface and form film, its bonding strength is very little, is difficult to meet battery needs; Need to introduce adhesive, the electrolyte of lithium battery is organic solvent, easily contacts with adhesive phase through hot sealing layer, makes electrolyte contamination cause battery performance to decline.3. time for the high power discharge that may repeatedly occur in actual use procedure, due to the heating of electric current ambassador battery electrode, battery electrode is connected with hot sealing layer again, thermal deformation and heat trnasfer make to produce micropore and micro-delamination between the hot sealing layer of ate electrode and aluminium foil layer, reduce the performance even destroying battery.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of battery core packing film and battery, effectively can prevent the corrosive liquids corrosive aluminum foil layer of battery, guarantee that the adhesive layer on aluminium foil layer surface does not come off, battery no leakage, improves the useful life of packaging film; Aluminium foil and battery and electrolyte contacts one side be not containing adhesive, and the battery performance avoiding the pollution of electrolyte to cause declines; Stop packaging film micropore and micro-delamination near high-rate battery discharge situation bottom electrode, ensure the performance of battery.
For solving the problems of the technologies described above; the technical scheme that the present invention adopts is: provide a kind of 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 plastic layer.
Wherein, described plastic layer is polyvinylidene chloride layer.
Wherein, the thickness of described protective layer is between 0.1 ~ 10 micron.
Wherein, the thickness of described protective layer is between 0.5 ~ 6 micron.
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 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.
Wherein, described battery is lithium ion flexible package battery, from sealing out extraction two panels bonding jumper after battery encapsulation, as the both positive and negative polarity electrode of battery.
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 polyvinylidene chloride 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; Aluminium foil and battery and electrolyte contacts one side be not containing adhesive, and the battery performance avoiding the pollution of electrolyte to cause declines; Stop micropore and micro-delamination near packaging film electrode slice in high-rate battery discharge situation, ensure the performance of battery.
Adopt traditional film technique, as film or extrude complex technique or multi-layer co-extruded complex technique etc., between the aluminium lamination and hot sealing layer polypropylene of packaging film, introduce polyvinylidene chloride layer, avoid introducing adhesive, but the polyvinylidene chloride thickness introduced like this is thicker, disturbs the heat sealability of hot sealing layer, is not suitable for the requirement of lithium ion battery to 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 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, plastic layer is polyvinylidene chloride layer.
Polyvinylidene chloride film is the best plastic film of known barrier, but makes the polyvinylidene chloride layer thickness considerable influence battery heat-sealing performance at battery package film and inapplicable due to traditional film technique.For realizing the thin and object of densification of polyvinylidene chloride layer thickness, the present invention adopts polyvinylidene chloride latex film forming technology.
The embodiment of the present invention chooses polyvinylidene chloride latex; adopt roller coat or painting way; polyvinylidene chloride latex is coated in aluminium foil layer surface; adopt high temperature speed solidification mode; by it solidification, thus form polyvinylidene chloride densified thin layer on aluminium foil layer surface, it is 2 ~ 8g/m2 that coated weight controls; and closely careful at aluminium foil layer surface cure, thus play the effect of protective layer.
Relative to particulate form polyvinylidene chloride blown film or the film technology of routine; its polyvinylidene chloride layer formed is all thicker and sparse; be combined not tight with aluminium foil layer; thickness greatly also affects the mouldability requirement of packaging film; even become adhesive layer but not protective layer; and its heat sealability cannot meet the encapsulation requirement of lithium battery, in order to improve the glue that polyvinylidene chloride bonding strength is introduced, can react with electrolyte the performance affecting lithium battery again.These all make to adopt conventional method to use the defect place of polyvinylidene chloride in the packaging film of lithium battery, cannot meet the special technical requirement of lithium cell core packaging film.
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 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 polyvinylidene chloride 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 battery R&D process to protective layer material.Present invention applicant determines through studying for a long period of time to adopt polyvinylidene chloride 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; Aluminium foil and battery and electrolyte contacts one side, not containing adhesive, avoid the pollution of electrolyte to cause battery performance to decline; Stop packaging film micropore and micro-delamination near high-rate battery discharge situation bottom electrode, ensure the performance of battery.
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 protective layer is between 0.5 ~ 6 micron, and the thickness of adhesive layer 3 is between 30 ~ 50 microns.
The 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 with contact electrolyte, wherein have two sheet metals to guide to outside batteries from battery packages inside.
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 (6)
1. a 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 polyvinylidene chloride layer; described polyvinylidene chloride layer is by adopting roller coat or painting way to be coated in aluminium foil layer surface in polyvinylidene chloride latex; adopt high temperature speed solidification mode; form the careful layer of polyvinylidene chloride closely at aluminium foil layer surface cure, it is 2 ~ 8g/m that coated weight controls
2.
2. battery core packing film according to claim 1, is characterized in that, the thickness of described protective layer is between 0.1 ~ 10 micron.
3. battery core packing film according to claim 2, is characterized in that, the thickness of described protective layer is between 0.5 ~ 6 micron.
4. 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.
5. a battery, it is characterized in that, battery core packing film described in described any one of battery claim 1-4 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.
6. battery according to claim 5, is characterized in that, described battery is lithium ion flexible package battery, draws two panels bonding jumper, as the both positive and negative polarity electrode of battery after battery encapsulation from heat-sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410068244.3A CN103824978B (en) | 2014-02-26 | 2014-02-26 | A kind of battery core packing film and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410068244.3A CN103824978B (en) | 2014-02-26 | 2014-02-26 | A kind of battery core packing film and battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103824978A CN103824978A (en) | 2014-05-28 |
| CN103824978B true CN103824978B (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410068244.3A Active CN103824978B (en) | 2014-02-26 | 2014-02-26 | A kind of battery core packing film and battery |
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| Country | Link |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140428A (en) * | 2015-08-16 | 2015-12-09 | 苏州锂盾储能材料技术有限公司 | Polymer soft packaging film for lithium-ion battery |
| WO2018025924A1 (en) * | 2016-08-05 | 2018-02-08 | 凸版印刷株式会社 | Exterior material for power storage device and method for manufacturing exterior material for power storage device |
| CN109897565A (en) * | 2018-12-19 | 2019-06-18 | 上海奥威科技开发有限公司 | The anti-battery aluminum plastic film for crossing envelope |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475037A (en) * | 2000-10-13 | 2004-02-11 | �Ѻ͵繤��װ��ʽ���� | Packaging material for electronic-part case, and others |
| CN203377273U (en) * | 2013-07-25 | 2014-01-01 | 中航锂电（洛阳）有限公司 | Lithium battery shell |
-
2014
- 2014-02-26 CN CN201410068244.3A patent/CN103824978B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475037A (en) * | 2000-10-13 | 2004-02-11 | �Ѻ͵繤��װ��ʽ���� | Packaging material for electronic-part case, and others |
| CN203377273U (en) * | 2013-07-25 | 2014-01-01 | 中航锂电（洛阳）有限公司 | Lithium battery shell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103824978A (en) | 2014-05-28 |
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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: 20161202 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: 20170510 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 |