CN105304834A - Aluminum plastic film capable of detecting battery leakage - Google Patents

Aluminum plastic film capable of detecting battery leakage Download PDF

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Publication number
CN105304834A
CN105304834A CN201510645992.8A CN201510645992A CN105304834A CN 105304834 A CN105304834 A CN 105304834A CN 201510645992 A CN201510645992 A CN 201510645992A CN 105304834 A CN105304834 A CN 105304834A
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CN
China
Prior art keywords
layer
plastic film
aluminum plastic
acid
base indicator
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Pending
Application number
CN201510645992.8A
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Chinese (zh)
Inventor
李奎
孙延先
任宁
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Zhejiang Chaowei Chuangyuan Industrial Co Ltd
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Zhejiang Chaowei Chuangyuan Industrial Co Ltd
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Priority to CN201510645992.8A priority Critical patent/CN105304834A/en
Publication of CN105304834A publication Critical patent/CN105304834A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • B32B15/088—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 polyamides
    • 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
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/183—Sealing members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention discloses an aluminum plastic film capable of detecting battery leakage. The aluminum plastic film capable of detecting battery leakage mainly aims to solve the problem that the existing lithium battery aluminum plastic film leakage detection speed is slow. The aluminum plastic film capable of detecting battery leakage provided by the invention sequentially comprises a PP layer, a binder layer A, an aluminum foil layer, a binder layer B, an acid-base indicator layer, a binder layer C and a nylon layer from inside to outside. The invention also provides another structure of the aluminum plastic film capable of detecting battery leakage, which comprises a PP layer, a binder layer A, an aluminum foil layer, a binder layer B, a nylon layer, a binder layer C, an acid-base indicator layer, a binder layer D and a PET layer from inside to outside. According to the aluminum plastic film capable of detecting battery leakage, the acid-base indicator layer is added in a laminated structure of the aluminum plastic film, when leakage occurs, the electrolyte is changed in color through being soaked by an acid-base indicator, so that whether the aluminum plastic film is damaged or not can be judged through naked eyes, simplicity and convenience are realized, and an extra operation is not needed.

Description

A kind of aluminum plastic film that can detect battery leakage
Technical field
The present invention relates to lithium battery production field, particularly relate to a kind of aluminum plastic film that can detect battery leakage.
Background technology
Soft package lithium battery has the advantages such as thickness is thin, lightweight, fail safe is good, is widely used in the fields such as various mobile device, electric automobile, electric tool.Lithium ion battery generally uses aluminum plastic film as shell, and aluminum plastic film is composited by three layers, the CPP layer of outermost nylon layer, middle aluminium foil layer, inner side usually, and their gross thickness is at 80 ~ 150 μm.The outermost nylon of aluminum plastic film has good anti-wear, breakage-proof function, and middle aluminium foil layer works the function intercepting air, moisture, and the CPP layer of inner side then plays isolated electrolytic corrosion, merges the effect of sealing.
Aluminum plastic film in punching course may owing to rushing, the shell degree of depth is excessively dark, Design of Dies improper to cause in aluminum plastic film layer polypropylene or outer nylon damaged, this breakage cannot to detect by an unaided eye resolution rushing the shell stage, if use this aluminum plastic film as shell packaged battery, after battery completes, the leakage of housing burn into can be caused, thus produce potential safety hazard.For eliminating this potential safety hazard, need to detect stamping forming plastic-aluminum shell.Detection method many employings copper sulphate is tested, and this experiment is equivalent to an electrolytic cell, is contacted by external power supply positive pole with plastic-aluminum shell aluminium lamination, external power supply negative pole and the aluminum plastic film that will detect are connected by copper-bath, if aluminum plastic film has breakage, then electrolytic cell conducting, has copper to separate out at breakage.
Chinese patent publication No. CN104390957A, disclose a kind of detection method of aluminum plastic film, this aluminum plastic film comprises the insulating plastic layer of aluminium lamination and encapsulating aluminium lamination, and the cavity had for accommodating battery core, comprise the following steps: get an aluminum plastic film to be measured, in the cavity of aluminum plastic film to be measured, inject copper-bath; Settle anode ear and negative electrode lug to aluminum plastic film to be measured, make positive and negative lug and copper-bath conducting, then will the plastic film cavity encapsulation of copper-bath be marked with, positive and negative lug is fixed and protrudes from outside aluminum plastic film; Positive and negative lug is connected respectively a positive source and negative pole, after the energising scheduled time, open aluminum plastic film to be measured and detect whether have RED sector, if any then judging that there is breakage at this position of aluminum plastic film.The method is equipped with lug on aluminum plastic film, lug and copper-bath conducting, and be connected on power supply, whether energising detects aluminum plastic film has RED sector, can judge that whether aluminum plastic film is qualified, easy and simple to handle, detect accurately, but it is slow that the method exists detection speed, detect the shortcomings such as rear sample cannot use.
Summary of the invention
Object of the present invention, mainly for the problem that existing lithium battery aluminum-plastic film leakage detection speed is slow, provides a kind of aluminum plastic film that can identify lithium battery leakage fast.
Concrete technical scheme of the present invention is: a kind of aluminum plastic film that can detect battery leakage, is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, acid-base indicator layer, adhesive layer C, nylon layer from the inside to the outside.
Another kind of technical scheme of the present invention is: a kind of aluminum plastic film that can detect battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, nylon layer, adhesive layer C, acid-base indicator layer, adhesive layer D, pet layer from the inside to the outside.
The electrolyte of lithium battery is generally acidity or alkalescence, and when leakage occurs for it, electrolyte can infiltrate acid-base indicator by damaged aluminum plastic film, and therefore acid-base indicator shows different sour looks or alkaline color, can judge battery whether leakage thus.Outer field pet layer or nylon layer, then can prevent the material such as oxygen, steam, carbon dioxide in air to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.
As preferably, described acid-base indicator layer is mixed by acid-base indicator, binding agent and inserts.Mixed with filler by acid-base indicator, can ensure using under less acid-base indicator condition, the area of acid-base indicator layer is larger.In actual use, according to the change of the electrolyte ph of seepage, suitable acid-base indicator can be selected.
As preferably, described inserts is selected from the one in nonwoven fabrics, PE, EVA, PP, EPE.
As preferably, described acid-base indicator layer thickness is 0.1 ~ 50 μm.Acid-base indicator layer thickness is too thick, if aluminum plastic film breakage is very little, leakage infiltration can be very slow, and may cause can not Timeliness coverage leakage, affects testing result.
The invention has the beneficial effects as follows: by increasing acid-base indicator layer in aluminum plastic film layer structure, when there is leakage, electrolyte is by infiltrating acid-base indicator, thus there is color change, can judge whether aluminum plastic film has breakage by naked eyes, simple and convenient, without the need to operation bidirectional.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of aluminum plastic film of the present invention;
Fig. 2 is the another kind of structural representation of aluminum plastic film of the present invention.
In figure: 1-1-adhesive layer A, 1-2-adhesive layer B, 1-3-adhesive layer C, 1-4-adhesive layer D, 2-PP layer, 3-aluminium foil layer, 4-acid-base indicator layer, 5-nylon layer, 6-PET layer.
Embodiment
Below in conjunction with accompanying drawing also by specific embodiment, technical scheme of the present invention is described further.
Embodiment 1
As shown in Figure 1, a kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, acid-base indicator layer 4, adhesive layer C1-3, nylon layer 5 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3 adopt is polyvinylidene fluoride binding agent.
Acid-base indicator layer 4 is mixed by methyl red indicator, polyvinylidene fluoride binding agent and nonwoven fabrics, and its thickness is 0.1 μm.Outer field nylon layer 5, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Embodiment 2
A kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, acid-base indicator layer 4, adhesive layer C1-3, nylon layer 5 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3 adopt is polyurethane adhesive.
Acid-base indicator layer 4 is mixed by methyl orange indicator, polyvinylidene fluoride binding agent and PE, and its thickness is 50 μm.Outer field nylon layer 5, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Embodiment 3
As shown in Figure 2, a kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, nylon layer 5, adhesive layer C1-3, acid-base indicator layer 4, adhesive layer D1-4, pet layer 6 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3, adhesive layer D1-4 adopt is acrylic resin binder.
Acid-base indicator layer 4 is mixed by reindeer moss indicator, acrylic resin binder and EVA, and its thickness is 0.1 μm.Outer field pet layer 6, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Embodiment 4
A kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, nylon layer 5, adhesive layer C1-3, acid-base indicator layer 4, adhesive layer D1-4, pet layer 6 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3, adhesive layer D1-4 adopt is acrylic resin binder.
Acid-base indicator layer 4 is mixed by phenolphthalein indicator, epoxy adhesive and EPE, and its thickness is 50 μm.Outer field pet layer 6, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.

Claims (5)

1. can detect an aluminum plastic film for battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, acid-base indicator layer, adhesive layer C, nylon layer from the inside to the outside.
2. can detect an aluminum plastic film for battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, nylon layer, adhesive layer C, acid-base indicator layer, adhesive layer D, pet layer from the inside to the outside.
3. a kind of aluminum plastic film that can detect battery leakage according to claim 1 and 2, it is characterized in that, described acid-base indicator layer is mixed by acid-base indicator, binding agent and inserts.
4. a kind of aluminum plastic film that can detect battery leakage according to claim 3, it is characterized in that, described inserts is selected from the one in nonwoven fabrics, PE, EVA, PP, EPE.
5. a kind of aluminum plastic film that can detect battery leakage according to claim 3, is characterized in that, described acid-base indicator layer thickness is 0.1 ~ 50 μm.
CN201510645992.8A 2015-10-08 2015-10-08 Aluminum plastic film capable of detecting battery leakage Pending CN105304834A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106198521A (en) * 2016-07-01 2016-12-07 天能电池集团有限公司 A kind of method detecting lead battery acid adding effect
CN106353371A (en) * 2016-09-30 2017-01-25 珠海市鹏辉电池有限公司 Aluminum plastic film detection method for lithium ion battery
CN106450490A (en) * 2016-12-16 2017-02-22 天津力神电池股份有限公司 Method for analyzing and detecting failure reasons of micropores of flexibly packaged lithium batteries
CN108303413A (en) * 2017-12-30 2018-07-20 惠州亿纬锂能股份有限公司 A kind of heat-shrinkable T bush and its preparation method and application
CN108896427A (en) * 2018-06-29 2018-11-27 广东天劲新能源科技股份有限公司 A kind of measurement method of electrodes of lithium-ion batteries rate of liquid aspiration and liquid absorption amount
CN109103352A (en) * 2017-06-20 2018-12-28 北京小米移动软件有限公司 Battery and equipment
CN109367155A (en) * 2018-10-18 2019-02-22 常州斯威克光伏新材料有限公司 A kind of dynamic lithium battery aluminum plastic film and preparation method thereof
CN111136970A (en) * 2019-12-19 2020-05-12 深圳市海盈科技有限公司 Aluminum plastic film for lithium ion battery and lithium ion battery
CN111540848A (en) * 2020-05-14 2020-08-14 华鼎国联四川动力电池有限公司 Lithium ion battery aluminum plastic film and preparation method thereof
CN112394012A (en) * 2020-11-06 2021-02-23 东莞市卓越新材料科技有限公司 Method for detecting moisture permeability of polypropylene film for lithium battery aluminum plastic film
CN112744402A (en) * 2020-12-29 2021-05-04 江苏中兴派能电池有限公司 Lithium ion battery packaging pole piece heat-sealing bag and preparation method thereof

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106198521A (en) * 2016-07-01 2016-12-07 天能电池集团有限公司 A kind of method detecting lead battery acid adding effect
CN106353371A (en) * 2016-09-30 2017-01-25 珠海市鹏辉电池有限公司 Aluminum plastic film detection method for lithium ion battery
CN106450490B (en) * 2016-12-16 2019-06-07 天津力神电池股份有限公司 The analyzing detecting method of soft package lithium battery microvia failure reason
CN106450490A (en) * 2016-12-16 2017-02-22 天津力神电池股份有限公司 Method for analyzing and detecting failure reasons of micropores of flexibly packaged lithium batteries
CN109103352A (en) * 2017-06-20 2018-12-28 北京小米移动软件有限公司 Battery and equipment
CN108303413A (en) * 2017-12-30 2018-07-20 惠州亿纬锂能股份有限公司 A kind of heat-shrinkable T bush and its preparation method and application
CN108896427A (en) * 2018-06-29 2018-11-27 广东天劲新能源科技股份有限公司 A kind of measurement method of electrodes of lithium-ion batteries rate of liquid aspiration and liquid absorption amount
CN109367155A (en) * 2018-10-18 2019-02-22 常州斯威克光伏新材料有限公司 A kind of dynamic lithium battery aluminum plastic film and preparation method thereof
CN111136970A (en) * 2019-12-19 2020-05-12 深圳市海盈科技有限公司 Aluminum plastic film for lithium ion battery and lithium ion battery
CN111540848A (en) * 2020-05-14 2020-08-14 华鼎国联四川动力电池有限公司 Lithium ion battery aluminum plastic film and preparation method thereof
CN111540848B (en) * 2020-05-14 2022-11-08 华鼎国联四川动力电池有限公司 Lithium ion battery aluminum plastic film and preparation method thereof
CN112394012A (en) * 2020-11-06 2021-02-23 东莞市卓越新材料科技有限公司 Method for detecting moisture permeability of polypropylene film for lithium battery aluminum plastic film
CN112744402A (en) * 2020-12-29 2021-05-04 江苏中兴派能电池有限公司 Lithium ion battery packaging pole piece heat-sealing bag and preparation method thereof

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Inventor after: Ren Ning

Inventor after: Sun Yanxian

Inventor after: Li Kui

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Application publication date: 20160203