CN105244455B - A kind of soft package lithium battery anti-corrosion protective film and its preparation method and application - Google Patents
A kind of soft package lithium battery anti-corrosion protective film and its preparation method and application Download PDFInfo
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- CN105244455B CN105244455B CN201510566133.XA CN201510566133A CN105244455B CN 105244455 B CN105244455 B CN 105244455B CN 201510566133 A CN201510566133 A CN 201510566133A CN 105244455 B CN105244455 B CN 105244455B
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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
- H01M50/1245—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure characterised by the external coating on the casing
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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 belongs to cell art, a kind of soft package lithium battery anti-corrosion protective film and its preparation method and application is specifically disclosed, the soft package lithium battery includes epoxy resin, phenolic resin, polyvinyl butyral resin and solvent with anti-corrosion protective film；The solvent is at least one of isopropanol, acetone and butyl acetate.Its preparation method is（1）Protect the preparation of film liquid：Epoxy resin, phenolic resin and polyvinyl butyral resin are added into solvent, pH is adjusted, heated, stirring；Stop heating, continue to add solvent to adjust system viscosity, stirring obtains protecting film liquid；（2）The preparation of diaphragm：By step（1）In obtained coating liquid using spray gun even application on soft package lithium battery battery core surface, dry and form diaphragm on soft package lithium battery battery core surface.The preparation method is simple, and obtained diaphragm possesses excellent corrosion resistance, is also equipped with good wearability and weatherability, and difficult for drop-off but easily peelable, does not remain.
Description
Technical field
The invention belongs to cell art, and in particular to a kind of soft package lithium battery anti-corrosion protective film and its preparation side
Method and application.
Background technology
Soft package lithium battery feature is the basic chemical property of integrated liquid lithium battery and the profile of poly-lithium battery
Unique advantage in packaging, and transmitted using the liquid electrolyte similar to liquid lithium battery as lithium ion between both positive and negative polarity
Medium.Soft package lithium battery compared with metal-back or electric battery with plastic case, soft package lithium battery has a safety feature, thickness of thin, flexible design,
Cost is lower, thus it is favored by users at home and abroad.But when soft package lithium battery is produced and processed, its surface is easy
Corrode by electrolyte etc., also easily scraped damage, influence product quality, some producers in order to prevent battery to be corroded, scrape damage,
Battery surface wraps up plastic sheeting, but there are more quality problems, such as plastic sheeting and battery surface using plastic sheeting
Between be pasted not strongly solid, occur the phenomenon come off during transport and use；Plastic sheeting weatherability is poor, under high temperature easily
There are two ends to tilt, anticorrosive property is also poor；Plastic sheeting peels off difficulty etc.；And the technique of parcel plastic sheeting takes, and also increases
Production cost is added.Current technology also discloses that a variety of composite protection films, and these composite protection films are made up of multilayer material, and it should
It is good with effect, but its cost of material is high, manufacture craft is cumbersome, is unfavorable for popularization and application.
Chinese patent CN1327540C discloses a kind of preparation method of lithium iron cell protective film, its by phenolic resin,
Epoxy resin, polyvinyl acetate, polyurethane, polytetrafluoroethylene (PTFE), neoprene, phenolic aldehyde-neoprene, epoxy-polyester amine, phenol
At least one of aldehyde-Pioloform, polyvinyl acetal etc. is added to deionized water, methanol, benzene, toluene, acetone, ethyl acetate, normal hexane
Deng at least one of in, then spray and to form protecting film, the protecting film smears easy, and can use deionized water, ethanol, acetone etc.
Cleaning, but the decay resistance of the protecting film, wearability and weatherability need to be improved.
Therefore, in view of the shortcomings of the prior art, it is necessary to research and develop a kind of soft package lithium battery anti-corrosion protective film and its system
Preparation Method, diaphragm had both possessed excellent corrosion resistance made from its method, was also equipped with good wearability and weatherability, and not
It is easy to fall off but easily peelable.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of soft package lithium battery anti-corrosion protective film and
Its preparation method, the soft package lithium battery anti-corrosion protective film possesses excellent corrosion resistance, be also equipped with good wearability and
Weatherability, and it is difficult for drop-off but easily peelable；And its preparation method is simple, process stabilizing.
To achieve these goals, technical scheme is as follows：
A kind of soft package lithium battery anti-corrosion protective film, includes the preparing raw material of following parts by weight：8 ~ 12 parts of epoxy resin,
70 ~ 80 parts of 5 ~ 8 parts of phenolic resin, 6 ~ 10 parts of polyvinyl butyral resin and solvent；The solvent is isopropanol, acetone and vinegar
At least one of acid butyl ester.
It is preferred that, it is made up of the preparing raw material of following parts by weight：10 parts of epoxy resin, 7 parts of phenolic resin, polyvinyl alcohol contracting
75 parts of 8 parts of butyral resin and solvent.
It is further preferred that the epoxy resin is bisphenol A type epoxy resin or bisphenol-s epoxy resin.
It is further preferred that the phenolic resin is rosin modified phenolic resin or dimethylbenzene phenol-formaldehyde resin modified.
It is further preferred that the solvent is the composition of acetone and butyl acetate, the weight of the acetone and butyl acetate
Measuring ratio is（8~12）: 1.
Above-mentioned soft package lithium battery specifically includes following steps with the preparation method of anti-corrosion protective film：
（1）Protect the preparation of film liquid：Epoxy resin, phenolic resin and polyvinyl butyral resin are added into solvent,
The use of vinegar acid for adjusting pH is 5 ~ 6, is heated to 55 ~ 65 DEG C, stir 20 ~ 40min；Stop heating, continue to add solvent with adjusting body
It is that viscosity is 3000 ~ 10000cps, then stirs 10 ~ 20min and obtain protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, is stood at normal temperatures or 80 ~ 90 DEG C of bakings are stood to protecting film liquid to dry, i.e., in Soft Roll lithium electricity under vacuum conditions
Pond battery core surface forms diaphragm.
In addition, present invention also offers described soft package lithium battery anti-corrosion protective film in soft package lithium battery production
Using in flexible package lithium cell assembling process, after battery core just seals process, in the battery core surface increase soft package lithium battery
Use anti-corrosion protective film；Then according to normal operating procedures, normal operating process includes fluid injection after baking, chemical conversion, pumping
Partial volume and integer；Before soft package lithium battery finally detects storage the soft package lithium battery anti-corrosion protection is sprayed at using ethanol
On film, you can tear the soft package lithium battery anti-corrosion protective film.
Soft package lithium battery anti-corrosion protective film of the present invention using at least one of isopropanol, acetone and butyl acetate as
Solvent, adds the composition of epoxy resin, phenolic resin and polyvinyl butyral resin, said composition is in specific solvent
In, it is that 5 ~ 6, temperature is to mix under conditions of 55 ~ 65 DEG C, with reference to crosslinking in pH value, is then sprayed on the battery core table of soft-package battery
Rotating fields stabilization, the diaphragm of excellent performance are formed on face.The present invention protects the electrolyte that film liquid neither can be with inside battery
Reaction, will not also damage battery core surface, the diaphragm of formation possesses good chemical stability, and adhesiveness is good, difficult for drop-off, spray
Apply and depart from after ethanol with battery core surface, can in flakes peel off, not remain.
In a word, compared with prior art, advantage of the invention is that：
（1）Soft package lithium battery of the present invention anti-corrosion protective film excellent performance, its chemical stability is high, corrosion-resistant, in reality
It can prevent electrolyte etc. from corroding in the production of border；Meanwhile, its wearability is good, hardness is high, is prevented effectively from production process to Soft Roll lithium
The scratching of battery battery core；It is difficult for drop-off and its heat resistance, adhesive force are strong, it is non-foaming under long-time high temperature, do not ftracture, not powder
Change, two ends, which are combined with the surface, not to tilt closely, battery core is effectively protected in soft package lithium battery production process.In addition Soft Roll of the present invention
Lithium battery is smeared with anti-corrosion protective film to be departed from after ethanol with battery core surface, can in flakes be peeled off, not remained.
（2）The preparation method cost of material of soft package lithium battery anti-corrosion protective film of the present invention is low, and operating method is simple, work
Skill is stable, can be applicable.Soft package lithium battery of the present invention is applied in soft package lithium battery production with anti-corrosion protective film, smears letter
Just, peel off fast, both play a part of effectively protecting battery core in soft package lithium battery production process, work effect is substantially increased again
Rate, reduces production cost.
Embodiment
The present invention is further described below by way of embodiment, but the present invention is not limited only to following examples.
In the scope of the present invention or not departing from present disclosure, in spirit and scope, to soft package lithium battery anti-corrosion of the present invention
Erosion diaphragm and preparation method thereof is suitably modified, replaces effect identical component, is to those skilled in the art
It will be apparent that they are considered as being included within the scope of the present invention.
Embodiment 1, soft package lithium battery anti-corrosion protective film of the present invention and preparation method thereof
Formula：Bisphenol A type epoxy resin 10kg, rosin modified phenolic resin 7kg, polyvinyl butyral resin 8kg and
Solvent 75kg；The solvent is the composition of acetone and butyl acetate, and the weight ratio of the acetone and butyl acetate is 10:1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, are 5.5 using vinegar acid for adjusting pH, are heated to 60 DEG C, stir 30min；Stop heating, continue
Solvent is added to adjust system viscosity as 5000cps, 15min is then stirred and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
Embodiment 2, soft package lithium battery anti-corrosion protective film of the present invention and preparation method thereof
Formula：Bisphenol-s epoxy resin 8kg, dimethylbenzene phenol-formaldehyde resin modified 8kg, polyvinyl butyral resin 6kg and
Solvent 78kg；The solvent is the composition of acetone and butyl acetate, and the weight ratio of the acetone and butyl acetate is 8:1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol-s epoxy resin, dimethylbenzene modified phenolic are added into solvent
Resin and polyvinyl butyral resin, are 5 using vinegar acid for adjusting pH, are heated to 65 DEG C, stir 20min；Stop heating, continue
Solvent is added to adjust system viscosity as 6000cps, 20min is then stirred and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
Embodiment 3, soft package lithium battery anti-corrosion protective film of the present invention and preparation method thereof
Formula：Bisphenol A type epoxy resin 12kg, dimethylbenzene phenol-formaldehyde resin modified 5kg, polyvinyl butyral resin 10kg
With solvent 73kg；The solvent is the composition of acetone and butyl acetate, and the weight ratio of the acetone and butyl acetate is 12:1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, dimethylbenzene modified phenolic are added into solvent
Resin and polyvinyl butyral resin, are 6 using vinegar acid for adjusting pH, are heated to 55 DEG C, stir 40min；Stop heating, continue
Solvent is added to adjust system viscosity as 8000cps, 10min is then stirred and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, under vacuum conditions 80 DEG C of bakings stand to protection film liquid and dried, i.e., formed and protected on soft package lithium battery battery core surface
Cuticula.
Embodiment 4, soft package lithium battery anti-corrosion protective film of the present invention and preparation method thereof
Formula：Bisphenol-s epoxy resin 10kg, rosin modified phenolic resin 6kg, polyvinyl butyral resin 8kg and
Solvent 73kg；The solvent is the composition of isopropanol and butyl acetate, and the weight ratio of the isopropanol and butyl acetate is 10:
1。
Preparation method：（1）Protect the preparation of film liquid：Bisphenol-s epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, are 6 using vinegar acid for adjusting pH, are heated to 60 DEG C, stir 30min；Stop heating, continue to add
Solubilizer stirs 20min to adjust system viscosity as 6000cps, then and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, under vacuum conditions 90 DEG C of bakings stand to protection film liquid and dried, i.e., formed and protected on soft package lithium battery battery core surface
Cuticula.
Embodiment 5, soft package lithium battery anti-corrosion protective film of the present invention and preparation method thereof
Formula：Bisphenol A type epoxy resin 10kg, rosin modified phenolic resin 7kg, polyvinyl butyral resin 8kg and
Solvent 75kg；The solvent is acetone.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, are 5.5 using vinegar acid for adjusting pH, are heated to 60 DEG C, stir 30min；Stop heating, continue
Solvent is added to adjust system viscosity as 5000cps, 15min is then stirred and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
Embodiment 6, soft package lithium battery anti-corrosion protective film of the present invention and preparation method thereof
Formula：Bisphenol A type epoxy resin 12kg, rosin modified phenolic resin 5kg, polyvinyl butyral resin 10kg and
Solvent 75kg；The solvent is the composition of acetone and butyl acetate, and the weight ratio of the acetone and butyl acetate is 10:1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, are 5.5 using vinegar acid for adjusting pH, are heated to 60 DEG C, stir 30min；Stop heating, continue
Solvent is added to adjust system viscosity as 5000cps, 15min is then stirred and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
The application of embodiment 7, soft package lithium battery anti-corrosion protective film of the present invention in soft package lithium battery production
In flexible package lithium cell assembling process, after battery core just seals process, according to the preparation method of embodiment 1 in electricity
Wicking surface increases the soft package lithium battery anti-corrosion protective film of embodiment 1；Then according to normal operating procedures, normal operating work
Sequence includes fluid injection after baking, chemical conversion, pumping partial volume and integer；It is sprayed at before soft package lithium battery finally detects storage using ethanol
On soft package lithium battery anti-corrosion protective film, you can tear soft package lithium battery anti-corrosion protective film.
Comparative example 1
Formula：Bisphenol A type epoxy resin 10kg, rosin modified phenolic resin 7kg and solvent 83kg；The solvent is acetone
With the composition of butyl acetate, the weight ratio of the acetone and butyl acetate is 10:1.
Preparation method be the same as Example 1.
Comparative example 2
Formula：Rosin modified phenolic resin 7kg, polyvinyl butyral resin 8kg and solvent 85kg；The solvent is third
The composition of ketone and butyl acetate, the weight ratio of the acetone and butyl acetate is 10:1.
Preparation method be the same as Example 1.
Comparative example 3
Formula：Bisphenol A type epoxy resin 10kg, rosin modified phenolic resin 7kg, polyvinyl butyral resin 8kg and
Solvent 75kg；The solvent is the composition of acetone and ethyl acetate, and the weight ratio of the acetone and ethyl acetate is 10:1.
Preparation method be the same as Example 1.
Comparative example 4
It is formulated be the same as Example 1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, are 5.5 using vinegar acid for adjusting pH, stir 30min；Continue addition solvent and glued with adjusting system
Spend for 5000cps, then stir 15min and obtain protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
Comparative example 5
It is formulated be the same as Example 1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, are 4 using vinegar acid for adjusting pH, are heated to 60 DEG C, stir 30min；Stop heating, continue to add
Solubilizer stirs 15min to adjust system viscosity as 5000cps, then and obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
Comparative example 6
It is formulated be the same as Example 1.
Preparation method：（1）Protect the preparation of film liquid：Bisphenol A type epoxy resin, rosin modified phenolic tree are added into solvent
Fat and polyvinyl butyral resin, stir 30min；Continue to add solvent to adjust system viscosity as 5000cps, then stir
15min obtains protecting film liquid；
（2）The preparation of diaphragm：By step（1）In obtained protection film liquid using spray gun even application in soft package lithium battery
Battery core surface, stands to protection film liquid and dries, i.e., form diaphragm on soft package lithium battery battery core surface at normal temperatures.
Test example one,
Test method：
1st, antiacid mist corrosion test：According to GB/T 10125-2012 artificial atmosphere corrosion test salt spray tests, in
Property salt spray test（NSS）Experiment, the test period be 24h, 48h, 72h, 96h, 144h, 168h, 192h, 216h, 240h, 264h,
288h, 312h and 336h.According to film bubble or rust staining amount come judge anticorrosion film by corrosion condition, if film 144h
Start appearance bubble or rust staining stop experiment, record 144h be used as film salt fog resistance corrosion test result；If experiment 336 hours
Do not occur bubbling or rust staining yet afterwards, then stop experiment, film salt fog resistance result of the test is designated as 336 hours.
2nd, abrasion test：According to the measure rotation rubber emery wheel of GB/T 1768-2006 paint and varnish wearabilities
Method, uses 100#Quartzy emery wheel is determined.
3rd, pencil hardness test：Hardness of paint film is determined according to GB/T 6739-2006 paint and varnish pencils method, successively
Pencil hardness test is carried out with 4B, 3B, 2B, HB, F, H, 2H, 3H and 4H pencil.
4th, heat-resistance test：According to the measure of GBT 1735-2009 paint and varnish heat resistances, sample is put into air blast
In baking oven, 120 DEG C and heated at constant temperature 24h are heated to, heating terminates, sample is cooled to together with convection oven after room temperature and take out
Observation.
5th, adhesion test：According to the cross cut test of GB/T 9286-1998 paint and varnish paint films, the examination is carried out
Test.
Performance test is carried out to diaphragm made from embodiment 1 ~ 6 and comparative example 1 ~ 6 using above-mentioned test method.Wherein
Test method 1 ~ 4 is according to GB/T 9271-2008（Paint and varnish standard test plate (panel)）Standard test plate (panel) is prepared using aluminium sheet to use again
Diaphragm made from the preparation method of embodiment 1 ~ 6 and comparative example 1 ~ 6 is tested；Test method 5, which directly takes preparation, guarantor
The battery core of the soft package lithium battery of cuticula is tested.Concrete outcome see the table below 1：
Each diaphragm performance test results of table 1
From upper table 1：
（1）The anti-corrosion protective film excellent performance of soft package lithium battery made from the embodiment of the present invention 1 ~ 6, its chemical stability
Height, it is corrosion-resistant, the phenomenon such as it will not dissolve, expand, come off in antiacid mist corrosion test, electrolysis can be prevented in actual production
Liquid etc. corrodes；Meanwhile, its wearability is good, hardness is high, is prevented effectively from the scratching to soft package lithium battery battery core in production process；And its
Heat resistance is good, adhesive force is strong, is not fallen off under long-time high-temperature baking, non-foaming, does not ftracture, not efflorescence, two ends are tight with surface
Close combination is not tilted, and battery is effectively protected in soft package lithium battery production process.In embodiment 1 ~ 6, with soft made from embodiment 1
Bag lithium battery is optimal with each performance indications of anti-corrosion protective film, so embodiment 1 is highly preferred embodiment of the present invention.
（2）Comparative example 1 and comparative example 2 lack a certain kind described in embodiment 1 in composition compared with Example 1,
Component, its obtained protection film properties are not so good as embodiment 1, illustrate bisphenol A type epoxy resin, rosin modified phenolic resin and gather
There is synergy in vinyl butyral resin three.
（3）Comparative example 3 compared with Example 1, changes the species of solvent, and butyl acetate is replaced with ethyl acetate, and it is made
The protection film properties obtained are also not so good as embodiment 1, and illustrating the solvent combination of acetone of the present invention and butyl acetate can promote well
Enter the combination that mixes of epoxy resin of the present invention, phenolic resin and polyvinyl butyral resin composition, especially promote
The combination that mixes of bisphenol A type epoxy resin, rosin modified phenolic resin and polyvinyl butyral resin composition, so as to be formed
Excellent performance, diaphragm suitable for soft package lithium battery battery core.
（4）Comparative example 4 ~ 6 compared with Example 1, changes the operating condition of preparation method, and the performance of diaphragm is made in it
There is obvious gap compared with Example 1, illustrate that pH value and heating stepses are adjusted in preparation method of the present invention each contributes to this
The interaction of invention soft package lithium battery anti-corrosion protection film formulation, so as to form Stability Analysis of Structures, the Soft Roll lithium of excellent performance
Battery anti-corrosion protective film.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (5)
1. a kind of soft package lithium battery anti-corrosion protective film, it is characterised in that be made up of the preparing raw material of following parts by weight：Epoxy
70~80 parts of 8~12 parts of resin, 5~8 parts of phenolic resin, 6~10 parts of polyvinyl butyral resin and solvent；The solvent is
The composition of acetone and butyl acetate, the weight ratio of the acetone and butyl acetate is (8~12):1；The phenolic resin is pine
Fragrant phenol-formaldehyde resin modified or dimethylbenzene phenol-formaldehyde resin modified；
The soft package lithium battery anti-corrosion protective film is made by following steps：
(1) preparation of film liquid is protected：Epoxy resin, phenolic resin and polyvinyl butyral resin are added into solvent, is used
Vinegar acid for adjusting pH is 5~6, is heated to 55~65 DEG C, stirs 20~40min；Stop heating, continue to add solvent to adjust system
Viscosity is 3000~10000cps, then stirs 10~20min and obtains protecting film liquid；
(2) preparation of diaphragm：By obtained protection film liquid in step (1) using spray gun even application in soft package lithium battery battery core
Surface, is stood at normal temperatures or 80~90 DEG C of bakings are stood to protecting film liquid to dry, i.e., in soft package lithium battery under vacuum conditions
Battery core surface forms diaphragm.
2. soft package lithium battery anti-corrosion protective film as claimed in claim 1, it is characterised in that by the preparation of following parts by weight
Raw material is constituted：75 parts of 10 parts of epoxy resin, 7 parts of phenolic resin, 8 parts of polyvinyl butyral resin and solvent.
3. soft package lithium battery anti-corrosion protective film as claimed in claim 1 or 2, it is characterised in that the epoxy resin is
Bisphenol A type epoxy resin or bisphenol-s epoxy resin.
4. a kind of method of the soft package lithium battery anti-corrosion protective film prepared as described in claims 1 to 3 is any, its feature exists
In comprising the following steps：
(1) preparation of film liquid is protected：Epoxy resin, phenolic resin and polyvinyl butyral resin are added into solvent, is used
Vinegar acid for adjusting pH is 5~6, is heated to 55~65 DEG C, stirs 20~40min；Stop heating, continue to add solvent to adjust system
Viscosity is 3000~10000cps, then stirs 10~20min and obtains protecting film liquid；
(2) preparation of diaphragm：By obtained protection film liquid in step (1) using spray gun even application in soft package lithium battery battery core
Surface, is stood at normal temperatures or 80~90 DEG C of bakings are stood to protecting film liquid to dry, i.e., in soft package lithium battery under vacuum conditions
Battery core surface forms diaphragm.
5. soft package lithium battery anti-corrosion protective film the answering in soft package lithium battery production as described in claims 1 to 3 is any
With, it is characterised in that in flexible package lithium cell assembling process, after battery core just seals process, on battery core surface, increase is described
Soft package lithium battery anti-corrosion protective film；Then according to normal operating procedures；Before soft package lithium battery finally detects storage
It is sprayed at using ethanol on the soft package lithium battery anti-corrosion protective film, you can tear the soft package lithium battery and protected with anticorrosion
Cuticula.
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| JP6423981B1 (en) * | 2018-06-22 | 2018-11-14 | 古河電池株式会社 | Lead storage battery and lead storage battery terminal rust prevention method |
| CN112670680B (en) * | 2020-12-23 | 2023-06-16 | 惠州市恒泰科技股份有限公司 | Electrolyte infiltration method of soft-package battery, soft-package battery and preparation method of soft-package battery |
| CN113894957A (en) * | 2021-10-29 | 2022-01-07 | 芜湖徽氏新材料科技有限公司 | Solvent-resistant protective film glue solution and preparation equipment and preparation method thereof |
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| CN1040813A (en) * | 1989-09-30 | 1990-03-28 | 张福生 | Solid adhesive |
| CN100480346C (en) * | 2004-12-14 | 2009-04-22 | 江苏冠军涂料实业有限公司 | Anti-rust coating agent and method for preparing the same |
| CN103756504A (en) * | 2013-12-20 | 2014-04-30 | 吴江邻苏精密机械有限公司 | Multifunctional rustproof coating agent and preparation method thereof |
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