CN109473608A - A kind of preparation method of lithium ion battery aluminum plastic film - Google Patents
A kind of preparation method of lithium ion battery aluminum plastic film Download PDFInfo
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- CN109473608A CN109473608A CN201811452540.8A CN201811452540A CN109473608A CN 109473608 A CN109473608 A CN 109473608A CN 201811452540 A CN201811452540 A CN 201811452540A CN 109473608 A CN109473608 A CN 109473608A
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- Prior art keywords
- plastic film
- aluminum plastic
- lithium ion
- ion battery
- preparation
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Primary Cells (AREA)
Abstract
Provide a kind of preparation method of lithium ion battery aluminum plastic film, it becomes soluble poly allyl resin by modified grafting processing method the following steps are included: curtain coating composite algorithm a) is prepared solid-state acrylic resin used in aluminum plastic film, and soluble resin is then configured to coating adhesive；B) on one surface that adhesive is coated in aluminium film and polypropylene screen, and it is dry, so that the solvent in adhesive is volatilized；C) mobility improvement is carried out to adhesive coating, then conformed on another the surface in aluminium film and polypropylene screen；D) low-temperature setting is carried out, so that adhesive layer wriggling levelling and is completed whole solidification process between aluminium film and polypropylene screen, obtains lithium ion battery aluminum plastic film.The aluminum plastic film that the method for the present invention obtains remains the superior function of the electrolyte resistance of thermal method aluminum plastic film, while avoiding the manufacturing conditions that thermal method prepares plastic-aluminum membrane process high temperature high pressure, effectively maintains the scouring depth performance and product appearance of aluminium foil.
Description
Technical field
The present invention relates generally to plastic-aluminum technical field of membrane, and in particular to a kind of preparation side of lithium ion battery aluminum plastic film
Method.
Background technique
With the development of smart phone, new-energy automobile and distributed power station, lithium battery Soft Roll, the power electric of smart machine
All there is great-leap-forward development in pond Soft Roll, energy-storage battery Soft Roll etc..Soft bag lithium ionic cell increasingly closeness to life, is meeting people
To high-energy density, light and short use demand while, safety, reliability increasingly become coke concerned by people
Point.
Currently, aluminum plastic film can be attributed to coating composite algorithm (dry method) and curtain coating composite algorithm (thermal method) two with regard to preparation method
Kind.Dry method aluminum plastic film is it is advantageous that the appearance of product is preferable, scouring depth superior performance, its shortcoming is that adhesive used is to electricity
The repellence for solving liquid is weaker, and the peeling force of electrolyte resistance is lower.The advantage of thermal method aluminum plastic film is because having used hot melt tree
Rouge polypropylene (PP) is used as adhesive layer, so that the electrolyte resistance performance of aluminum plastic film is improved, electrolyte peeling force has larger change
Kind, disadvantage is that appearance is poor, and resin crystal point is more, is influenced by manufacture craft high temperature, condition of high voltage, the scouring depth of aluminum plastic film
Performance is poor.In consideration of it, if the advantage of above two method, which is integrated, will be substantially improved the comprehensive performance of product.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of preparation side of lithium ion battery aluminum plastic film
Method, this method combine dry method plastic-aluminum membrane preparation method in the prior art and thermal method plastic-aluminum membrane preparation method, evade existing dry
The shortcomings that method/thermal method aluminum plastic film, its comprehensive advantage, make product appearance, scouring depth, in terms of performance can obtain
Guarantee.
The technical scheme is that a kind of preparation method of lithium ion battery aluminum plastic film, comprising the following steps:
A) curtain coating composite algorithm solid-state acrylic resin used in aluminum plastic film is prepared to become by modified grafting processing method
Flowable state can dissolve acrylic resin, and soluble resin is then configured to coating adhesive；
B) on one surface that adhesive obtained by step a) is coated in aluminium film and polypropylene screen, and it is dry, make glue
Solvent volatilization in glutinous agent；
C) mobility improvement is carried out to the adhesive coating after step b) is dry, then conformed to corresponding in step b)
The aluminium film and polypropylene screen in aluminium another surface on；
D) carry out low-temperature setting, make adhesive layer between aluminium film and polypropylene screen wriggling levelling and complete all solidified
Journey obtains lithium ion battery aluminum plastic film.
Further, it is isotactic that the curtain coating composite algorithm in above-mentioned steps a), which prepares solid-state acrylic resin used in aluminum plastic film,
One of acrylic resin, modified polypropene, modified chlorinated polypropylene or a variety of mixtures.
Further, flowable state soluble poly allyl resin refers to that acrylic resin is dissolvable in water hexamethylene in above-mentioned steps a)
In one of alkane, methyl cyclohexanol, toluene, dimethylbenzene, alicyclic hydrocarbon type or a variety of mixtures.
Further, the method that mobility improves in above-mentioned steps c) are as follows: made by conduction, radiation and gas convection type
Adhesive coating is heated and restores mobility.
Further, above-mentioned conduction, radiation and gas convection type include electric heating, infrared heating, in Hot-blast Heating
One or more combinations.
Further, the method for low-temperature setting is using Hot-blast Heating mode in 40~100 DEG C of ranges in above-mentioned steps d)
Interior progress constant temperature or gradient-heated, until material is fully cured.
Further, the heat source of above-mentioned Hot-blast Heating is one of electric heating, steam heating, conduction oil or a variety of groups
It closes.
Further, flowable state soluble poly allyl resin is isotactic chlorinated polypropylene and/or random in above-mentioned steps a)
One of chlorinated polypropylene.
Further, in above-mentioned steps d) in 2~20 micron range of thickness of adhesive layer；The thickness of aluminium film 10~
In 150 micron ranges；The thickness of the polypropylene screen is in 15~200 micron ranges.
Compared with prior art, beneficial effect is the present invention:
Adhesive resin used in the method for the present invention is that thermal method prepares the polypropylene tree that aluminum plastic film uses in the prior art
The modified gained of rouge, so remaining thermal method prepares the superior advantage of aluminum plastic film products obtained therefrom electrolyte resistance performance, while using dry
Method prepares the painting etamine making process of aluminum plastic film, avoids the manufacturing conditions that thermal method prepares plastic-aluminum membrane process high temperature high pressure, effectively
The scouring depth performance for maintaining aluminium foil and product appearance.
Specific embodiment
In order to make those skilled in the art more fully understand the present invention, With reference to embodiment to the present invention make into
One step is described in detail.
Embodiment
A kind of preparation method of lithium ion battery aluminum plastic film, concrete technology are that thermal method is prepared aluminum plastic film first
Polypropylene obtains modified chlorinated polypropylene (MCPP) by graft modification；Then dry coating is become by dissolution
Adhesive, dissolution solvent for use can be methyl cyclohexanol, toluene, dimethylbenzene, alicyclic hydrocarbon type (such as normal hexane)；First by gluing
Agent is coated on aluminium film or modified chlorinated polypropylene film, and drying makes the solvent in adhesive coating volatilize；Then another in progress
(if be coated in aluminium film before, then the another side of adhesive is bonded with modified chlorinated polypropylene film before the fitting of layer；It is on the contrary
) by heating roller or other heating devices adhesive coating is warmed to 80~120 DEG C, enable adhesive layer soften and
Made after being bonded using the low-temperature setting of a period of time with enough viscosity and mobility with meeting the needs of fitting
Obtaining adhesive layer resin has enough intensity, and preferred solidification temperature is 40~100 DEG C, curing time is 24~200h, is obtained
To lithium ion battery aluminum plastic film.According to above-mentioned technique, different condition parameter is selected, the product characteristic of different performance is obtained,
As shown in table 1 below, table 1 be 1~embodiment of embodiment 7 prepare lithium ion battery aluminum plastic film different condition and corresponding product
Performance.
1 1~embodiment of embodiment 7 of table prepares the different condition and properties of product of lithium ion battery aluminum plastic film
Aluminum plastic film obtained in embodiment, wherein adhesive layer with a thickness of 1~10 micron, polypropylene screen used (pp)
With a thickness of 40~120 microns, aluminium foil is 20~120 microns, finished product of the peeling force of gained aluminum plastic film in 10~20N, with thermal method
Removing is completely suitable, and electrolyte resistance performance is all satisfied immersion demand for 24 hours, rush shell depth have with finished product thickness increase it is certain poor
The opposite sex reaches the product level of dry method, and the problem of appearance such as appearance non-crystal point.Specific data distribution rule is as follows:
1) with the raising of adhesive softening temperature, the peeling force and electrolyte resistance performance of finished product aluminum plastic film have increase trend.
2) there is increase with the increase of adhesive thickness, finished product peeling force and electrolyte resistance performance, but under stamp depth has
Drop trend.
3) there are increase, but stamp depth with the increase of polypropylene film thickness, finished product peeling force and electrolyte resistance performance
There is downward trend.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.Therefore, protection scope of the present invention is answered
This is subject to the protection scope in claims.
Claims (9)
1. a kind of preparation method of lithium ion battery aluminum plastic film, which is characterized in that it the following steps are included:
A) curtain coating composite algorithm is prepared into solid-state acrylic resin used in aluminum plastic film and becomes solvable by modified grafting processing method
Property acrylic resin, is then configured to coating adhesive for soluble resin；
B) on one surface that adhesive obtained by step a) is coated in aluminium film and polypropylene screen, and it is dry, make adhesive
In solvent volatilization；
C) mobility improvement is carried out to the adhesive coating after step b) is dry, then conformed to corresponding to the institute in step b)
It states on the surface of another in aluminium film and polypropylene screen；
D) low-temperature setting is carried out, adhesive layer is made wriggling levelling and to complete whole solidification process between aluminium film and polypropylene screen,
Obtain lithium ion battery aluminum plastic film.
2. the preparation method of lithium ion battery aluminum plastic film as described in claim 1, which is characterized in that in the step a)
Curtain coating composite algorithm prepare solid-state acrylic resin used in aluminum plastic film be isotactic polypropylene resin, it is modified polypropene, modified chlorinated
One of polypropylene or a variety of mixtures.
3. the preparation method of lithium ion battery aluminum plastic film as described in claim 1, which is characterized in that can in the step a)
Dissolubility acrylic resin refer to acrylic resin be dissolvable in water hexamethylene, methyl cyclohexanol, toluene, dimethylbenzene, in alicyclic hydrocarbon type
One or more mixtures in.
4. the preparation method of lithium ion battery aluminum plastic film as described in claim 1, which is characterized in that stream in the step c)
The method that dynamic property improves are as follows: make adhesive coating is heated to restore mobility by conduction, radiation and gas convection type.
5. the preparation method of lithium ion battery aluminum plastic film as claimed in claim 4, which is characterized in that the conduction, radiation
It include one of electric heating, infrared heating, Hot-blast Heating or a variety of combinations with gas convection type.
6. the preparation method of lithium ion battery aluminum plastic film as described in claim 1, which is characterized in that low in the step d)
The cured method of temperature is that constant temperature or gradient-heated are carried out within the scope of 40~100 DEG C using Hot-blast Heating mode, until material is complete
All solidstate.
7. the preparation method of lithium ion battery aluminum plastic film as claimed in claim 6, which is characterized in that above-mentioned Hot-blast Heating
Heat source is one of electric heating, steam heating, conduction oil or multiple combinations.
8. the preparation method of lithium ion battery aluminum plastic film as described in claim 1, which is characterized in that can in the step a)
Dissolubility acrylic resin is isotactic chlorinated polypropylene and/or randomly chlorinated acrylic resin.
9. the preparation method of lithium ion battery aluminum plastic film as described in claim 1, which is characterized in that glue in the step d)
The thickness of adhensive layer is in 2~20 micron ranges；The thickness of aluminium film is in 10~100 micron ranges；The thickness of the polypropylene screen
Degree is in 15~200 micron ranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452540.8A CN109473608B (en) | 2018-11-30 | 2018-11-30 | Preparation method of aluminum plastic film for lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452540.8A CN109473608B (en) | 2018-11-30 | 2018-11-30 | Preparation method of aluminum plastic film for lithium ion battery |
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| CN109473608A true CN109473608A (en) | 2019-03-15 |
| CN109473608B CN109473608B (en) | 2020-06-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158298A (en) * | 2011-12-08 | 2013-06-19 | 祝琼 | Aluminium-plastic film and preparation method for same |
| CN107987759A (en) * | 2017-12-08 | 2018-05-04 | 苏州爱康薄膜新材料有限公司 | A kind of aluminum-plastic membrane used for packaging lithium battery corrosion resistant type adhesive |
| CN108656649A (en) * | 2018-03-28 | 2018-10-16 | 江苏东材新材料有限责任公司 | A kind of soft bag lithium ionic cell aluminum-plastic composite membrane and preparation method thereof |
-
2018
- 2018-11-30 CN CN201811452540.8A patent/CN109473608B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158298A (en) * | 2011-12-08 | 2013-06-19 | 祝琼 | Aluminium-plastic film and preparation method for same |
| CN107987759A (en) * | 2017-12-08 | 2018-05-04 | 苏州爱康薄膜新材料有限公司 | A kind of aluminum-plastic membrane used for packaging lithium battery corrosion resistant type adhesive |
| CN108656649A (en) * | 2018-03-28 | 2018-10-16 | 江苏东材新材料有限责任公司 | A kind of soft bag lithium ionic cell aluminum-plastic composite membrane and preparation method thereof |
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| CN109473608B (en) | 2020-06-30 |
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