CN106848153B - A kind of film build method - Google Patents
A kind of film build method Download PDFInfo
- Publication number
- CN106848153B CN106848153B CN201710058250.4A CN201710058250A CN106848153B CN 106848153 B CN106848153 B CN 106848153B CN 201710058250 A CN201710058250 A CN 201710058250A CN 106848153 B CN106848153 B CN 106848153B
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- Prior art keywords
- slurry
- ice
- crystal
- basement membrane
- film build
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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
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a kind of film build methods, include the following steps realization: a), choosing basement membrane；B), cooling into ice chest, so that its surface is condensed the small ice crystal of particle；C), ice crystal basement membrane is taken out；D), coated with the slurry for including at least gel mixing and be covered in ice crystal and membrane surface；E), into oven cooking cycle slurry is solidified, ice crystal of being subject to evaporates；F), overlay film is completed.Using above-mentioned film build method, basement membrane is put into ice chest cooling, its surface is set to condense subtle crystal ice granule in a short time, the slurry of gel hybrid shaping is included at least after taking-up in membrane surface coating, since ice crystal forms several protrusions in membrane surface in particle, slurry is wrapped on crystal ice granule, and part size fills toward crystal ice granule bottom end and infiltrates into membrane surface compound sticking；Entering back into oven cooking cycle makes to be wrapped in interior crystal ice granule thawing evaporation disappearance by slurry, slurry is formed several vacuum chambers in the membrane surface at former crystal ice granule at that time, these vacuum chambers are firmly adsorbed in membrane surface, are enhanced the bonding force of basement membrane and slurry after solidification and are not destroyed basement membrane itself.
Description
Technical field
The present invention relates to a kind of preparation method of composite membrane, espespecially a kind of method and use with cooling means processing composite membrane
The method of cooling means processing battery diaphragm.
Background technique
For the polyolefine material smooth for surface compact does the basement membrane of composite mortar, sided corona treatment is just had to pass through.
The principle of sided corona treatment is using surge or breakdown substrate tunic, and under high voltage electric field, electron stream carries out plastic film strong
Strong impact, and enhance with the raising of electric current and voltage, make wildness, become coarse, increases surface area, thus
Good effect of impregnation is generated, the adhesive strength with pulp layer is increased；Although being able to solve basement membrane and slurry in this way
It is compound loosely the problem of, but can equally have the case where undertreatment and overtreating in actual fabrication process, at basement membrane
Reason is easy to cause its low wetability of surface tension poor when insufficient, and basal layer is bonding with slurry insecure；Breakdown；To basement membrane processing
Breakdown film is easy for when excessively, when use be easy to cause security risk, if battery is held using the excessive diaphragm of this electric shock
It easily leads to short circuit or even sets off an explosion.
Summary of the invention
There are undertreatments and overtreating when corona mode handles basement membrane in order to solve, and are easy to cause in undertreatment
Its low wetability difference of surface tension is bonding with slurry insecure；Breakdown film is easy in overtreating, when use is easy to make
The technical issues of at security risk.
The purpose of the present invention is to provide a kind of film build methods, not only compound secured using this method, do not have to also destroy base
Film.
According to an aspect of the invention, there is provided a kind of film build method, comprising the following steps:
A), basement membrane is chosen；
B), cooling into ice chest, so that its surface is condensed the small ice crystal of particle；
C), ice crystal basement membrane is taken out；
D), coated with the slurry for including at least gel mixing and be covered in ice crystal and membrane surface；
E), into oven cooking cycle slurry is solidified, ice crystal of being subject to evaporates；
F), overlay film is completed.
Using above-mentioned film build method, basement membrane is put into cooling in ice chest, making its surface, condensation is thin rapidly in a short time
Micro- crystal ice granule includes at least the slurry of gel hybrid shaping in membrane surface coating after taking-up, since ice crystal exists in particle
Membrane surface forms several protrusions, and slurry is wrapped on crystal ice granule, and part size is filled and infiltrated into toward crystal ice granule bottom end
Membrane surface compound sticking；Slurry is solidified subsequently into oven cooking cycle, while also making to be wrapped in interior crystal ice granule by slurry
Melt evaporation to disappear, slurry is formed several vacuum chambers in the membrane surface at former crystal ice granule at that time, these vacuum
Chamber is firmly adsorbed in membrane surface, is enhanced the bonding force of basement membrane and slurry after solidification and is not destroyed basement membrane itself.
In some embodiments, according to the design needs of product, the preferable polyolefin of material flexibility can be used, gathered
Vinyl film or polypropylene and its composite membrane are as basement membrane.
In some embodiments, in order to keep compound pulp layer and base film viscosity stronger, gel can for rubber or
Aqueous, oiliness binder.
In some embodiments, it can be added when preparing certain specific composite membranes and increase powerful substance, such as
Aluminium oxide powder can also be added in slurry when preparing battery diaphragm.It as coating material and is glued using high purity aluminium oxide
Mixture, which is used together, can play the role of proposing diaphragm heatproof coated in PE, PP or PP/PE composite material surface, this is because
High purity aluminium oxide is platelike crystal structure, and the support function in battery diaphragm as supplement, when current is excessive, battery is easy
Fever, easily causes battery thermal runaway, and when inside battery reaches 150 DEG C, basement membrane melts and then causes large area short-circuit, battery
Accident generates；After having high purity nanometer alumina coating, heatproof is raised to 320 DEG C, and thermal runaway problem is avoided significantly.It utilizes
The special physical and chemical properties of the material, can greatly improve the security performance of lithium battery.
In some embodiments, subzero between 10--20 DEG C, the temperature of oven is set in described cold the temperature inside the box
Between 60-90.
In some embodiments, in order to make membrane surface form ice crystal rapidly, ice chest can be liquid nitrogen plan.
In some embodiments, battery diaphragm is made in this method, which is characterized in that slurry is to include by quality percentage
Than the composition 30%-40% and deionized water of calculating；Wherein the composition includes that the granularity that is calculated by mass percentage is straight
Diameter is aluminum oxide powder 40-50-%, aqueous binders or rubber 10-20%, the filler 5%- of 0.1um-0.5um
10%.
Detailed description of the invention
Fig. 1 is the process flow chart of film build method embodiment.
Fig. 2 is product profile obtained in the present inventive method.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
Fig. 1 schematically shows a kind of process flow chart of film build method according to the present invention.
As shown, the film build method, firstly, choosing air-locked PP/PE material as basement membrane；It is set into temperature
The ice chest being scheduled between subzero 10 or 20 DEG C carries out cooling treatment 30 seconds, its surface is made to condense into hard ice crystal layer；Then
Coating on the surface thereof includes the slurry of rubber or aqueous binders hybrid shaping, coating while taking out basement membrane after cooling
Basement membrane after complete slurry puts it into rapidly baking in the oven that temperature is set between 60 or 90 DEG C again and takes out shape after 30 seconds
At final composite membrane.
The principle for the composite membrane realized using above-mentioned film build method is, as shown in Figure 2；Basement membrane 1 is put into cold in ice chest
But, its surface is made to condense subtle crystal ice granule rapidly in a short time, coating includes at least rubber on 1 surface of basement membrane after taking-up
Or the slurry 11 of aqueous binders hybrid shaping, since ice crystal forms several protrusions on 1 surface of basement membrane in particle, slurry 11 is wrapped up
On crystal ice granule, part size 11 fills toward crystal ice granule bottom end and infiltrates into 1 surface recombination of basement membrane bonding；Subsequently into roasting
Case baking solidifies slurry 11, while also making to be wrapped in interior crystal ice granule thawing by slurry 11 and evaporate to disappear, at that time slurry 11
It is formed several vacuum chambers 12 on 1 surface of basement membrane at former crystal ice granule, these vacuum chambers 12 are firmly adsorbed on base
On 1 surface of film, enhances the bonding force of basement membrane 1 and slurry 12 after solidification and do not destroy basement membrane 1 itself.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
Claims (7)
1. a kind of film build method of battery diaphragm, which comprises the following steps:
A), the basement membrane of thermoplastic resin material is chosen；
B), cooling into ice chest, so that its surface is condensed the small ice crystal of particle；
C), ice crystal basement membrane is taken out；
D), coated with the slurry that gel mixes and be covered in ice crystal and membrane surface；
E), into oven cooking cycle slurry is solidified, ice crystal of being subject to evaporates；
F), overlay film is completed.
2. the film build method of battery diaphragm according to claim 1, which is characterized in that the basement membrane be polyethylene film or
Polypropylene and polypropylene composite film.
3. the film build method of battery diaphragm according to claim 1 or 2, which is characterized in that the gel be rubber or
Aqueous, oiliness binder.
4. the film build method of battery diaphragm according to claim 1 or 2, which is characterized in that the slurry further includes having
Aluminium oxide powder and other solid state powders.
5. the film build method of battery diaphragm according to claim 1 or 2, which is characterized in that described cold the temperature inside the box exists
Subzero between 10-20 DEG C, the temperature of oven is set between 60-90 DEG C.
6. the film build method of battery diaphragm according to claim 5, which is characterized in that the ice chest is liquid nitrogen plan.
7. the film build method of battery diaphragm described in 1 to 6 any one of application requirement synthesizes battery diaphragm, which is characterized in that
The slurry be include the composition 30%-40% being calculated by mass percentage and deionized water；The wherein composition packet
Include aluminum oxide powder 40-50%, aqueous binders that the particle size diameter that is calculated by mass percentage is 0.1um-0.5um or
Rubber 10-20%, filler 5%-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710058250.4A CN106848153B (en) | 2017-01-23 | 2017-01-23 | A kind of film build method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710058250.4A CN106848153B (en) | 2017-01-23 | 2017-01-23 | A kind of film build method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106848153A CN106848153A (en) | 2017-06-13 |
| CN106848153B true CN106848153B (en) | 2019-11-12 |
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| CN201710058250.4A Active CN106848153B (en) | 2017-01-23 | 2017-01-23 | A kind of film build method |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4245637B2 (en) * | 2007-03-14 | 2009-03-25 | 財団法人川村理化学研究所 | Organic-inorganic composite coating film, method for producing the same, and aqueous coating composition |
| CN101928526B (en) * | 2009-11-26 | 2013-09-04 | 苏州皓鑫电子科技有限公司 | Method for preparing composite membrane and composite membrane prepared by using same |
| CN102832375B (en) * | 2011-06-13 | 2015-09-30 | 蒋勇明 | Lithium ion battery cathode material and its preparation method |
| CN104371139A (en) * | 2013-08-14 | 2015-02-25 | 赵宽 | Method for preparation of ceramic composite membrane by pore formation by icecrystallization and ceramic composite membrane |
| CN105355815A (en) * | 2015-12-14 | 2016-02-24 | 苏州锂盾储能材料技术有限公司 | Preparation method of lithium ion battery high-heat-resistance and high-infiltration diaphragm |
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Effective date of registration: 20191017 Address after: 518000 Room 401, building B, Jinhao entrepreneurial park, No. 9, Dafu Industrial Zone, Dafu community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Runfeng new energy Co., Ltd. Address before: 518000 Guangdong Province, Shenzhen city Longhua District Guanlan community rich Ao Bei Industrial Zone No. 9 Jin Hao Park B building four floor Applicant before: Shenzhen tianheshun new energy Limited by Share Ltd |
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