CN108948984A - A method of improving soft package lithium battery hardness and toughness - Google Patents
A method of improving soft package lithium battery hardness and toughness Download PDFInfo
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- CN108948984A CN108948984A CN201810598025.4A CN201810598025A CN108948984A CN 108948984 A CN108948984 A CN 108948984A CN 201810598025 A CN201810598025 A CN 201810598025A CN 108948984 A CN108948984 A CN 108948984A
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- lithium battery
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- package lithium
- toughness
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention belongs to battery technology fields, specifically disclose a kind of method for improving soft package lithium battery hardness and toughness, itself the following steps are included: S1 coating liquid preparation: solvent is stirred at high speeds, is subsequently added into the composition of alkyd resin, Lauxite and polyether-ether-ketone, stir；Continue to add solvent to adjust system viscosity, then stirs 10~30min and obtain coating liquid；The preparation of S2 film: it by coating liquid obtained in step S1 using spray gun even application on soft package lithium battery surface, stands at normal temperature or high-temperature baking is stood to coating liquid drying under vacuum conditions, i.e., form film on soft package lithium battery surface.Preparation method formula of the present invention is simple, and process stabilizing, film obtained can effectively improve the hardness and toughness of soft package lithium battery, is also equipped with excellent abrasion resistance, corrosion resistance and water-resistance, and effective protection soft package lithium battery extends soft package lithium battery service life.
Description
Technical field
The invention belongs to battery technology fields, and in particular to a method of improve soft package lithium battery hardness and toughness.
Background technique
Soft package lithium battery feature is the basic chemical property of integrated liquid lithium battery and the shape of poly-lithium battery
Unique advantage in packaging, and transmitted between positive and negative anodes using liquid electrolyte similar with liquid lithium battery as lithium ion
Medium.Soft package lithium battery compared with metal-back or electric battery with plastic case, soft package lithium battery has a safety feature, thickness is thin, flexible design,
Cost is lower, thus its favor by users at home and abroad.Meanwhile the outstanding advantages of soft package lithium battery are the letters of its manufacturing process
It is single, at low cost, high yield rate.But soft package lithium battery outsourcing plastic-aluminum film hardness is too poor to cause battery easily-deformable, concave point, pleat easily occurs
The bad orders such as wrinkle, scratch, and aluminum plastic film is easy breakage, especially in power technology field, plastic-aluminum film hardness and toughness are inadequate,
It is unable to undergo Long-term Vibration and hits and limit soft package lithium battery in the development in the field.
Patent document CN 102653656A discloses a kind of method of hardness and toughness for improving soft-package battery, uses
Thermoplastic phenolic resin, rosin modified alkyd resin, Lauxite, polyvinyl butyral or alcohol-soluble polyacrylic resin are molten
In methanol, ethyl alcohol, ethylene glycol, propyl alcohol, isopropanol, propylene glycol, n-butanol, isobutanol, 1,4-butanediol or hexanol, then spray
Film is formed to improve the hardness and toughness of soft-package battery on soft-package battery surface, however the program improves the hardness of soft-package battery
It need to be improved with the effect of toughness.
Patent document CN 105111903A discloses a kind of painting film preparation side for enhancing soft package lithium battery hardness and toughness
Method is dissolved in acetone and acetic acid by using the composition of alkyd resin, epoxy resin and polyether-ether-ketone as class coating material
Then defoaming agent and levelling agent is added in the in the mixed solvent of butyl ester, coating liquid is made, then is sprayed on soft-package battery surface and forms painting
Film is to improve the hardness and toughness of soft-package battery, however program formula is more complex, need to be using defoaming agent and levelling agent to eliminate
The defects of bubble improves its levelability and uniformity, and otherwise film is easy to appear flake, pin hole, dark bubble.
Therefore, it is necessary to improve to the prior art, to obtain, a kind of formula is simpler but to effectively improve Soft Roll lithium
The method of battery hardness and toughness.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of raising soft package lithium battery hardness and toughness
The formula of method, this method is simple, and film obtained can effectively improve the hardness and toughness of soft package lithium battery, also has excellent
Abrasion resistance, corrosion resistance and water-resistance, effective protection soft package lithium battery, extend soft package lithium battery service life.
To achieve the goals above, technical scheme is as follows:
A method of soft package lithium battery hardness and toughness are improved, specifically includes the following steps:
The preparation of S1, coating liquid: it is to stir 3~6min under 800~1000rpm by solvent low whipping speed, is subsequently added into
The composition of the alkyd resin of weight of solvent 0.2~0.3%, Lauxite and polyether-ether-ketone is heated to 65~75 DEG C, stirring 20
~40min, then adjust pH value be 4~6, stop heating, continue add solvent with adjust system viscosity be 3000~
Then 5000cps stirs 10~30min and obtains coating liquid；
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
It is stood under room temperature or 80~90 DEG C of bakings is stood to coating liquid drying under vacuum conditions, i.e., formed and applied on soft package lithium battery surface
Film.
Further, the weight ratio of the alkyd resin, Lauxite and polyether-ether-ketone is 1:(0.6~0.9): (0.2~
0.6)。
Further, the weight ratio of the alkyd resin, Lauxite and polyether-ether-ketone is 1:0.8:0.4.
Further, the alkyd resin is acrylic acid modified alkyd resin or rosin modified alkyd resin.
Further, the solvent is the mixed liquor of ethylene glycol and tetrahydrofuran, or is the mixed of propylene glycol and tetrahydrofuran
Close liquid.
Further, the weight ratio of the ethylene glycol and tetrahydrofuran is (2~4): 1.
Further, the propylene glycol and the weight ratio of tetrahydrofuran are (2~4): 1.
Further, in the step S1, vinegar acid for adjusting pH value is used.
The method that the present invention improves soft package lithium battery hardness and toughness has by coating one layer on soft package lithium battery surface
The film of certain degree of hardness and good abrasion resistance, corrosion resistance and water-resistance, with realize significantly improve soft package lithium battery hardness and
Toughness purpose.Specifically, the present invention is mixed with tetrahydrofuran as solvent using ethylene glycol or propylene glycol, on the one hand, in a solvent
The composition of certain proportion alkyd resin, Lauxite and polyether-ether-ketone is added, at 65~75 DEG C, the composition is made in solvent
It is further mixed with lower, crosslinking combines, and is then sprayed on the outer surface of soft-package battery and forms one layer of stable structure, has excellent performance
Film；On the other hand, which can effectively inhibit bubble, improve levelability, effectively avoid the films such as flake, pin hole, dark bubble
The appearance of defect.Meanwhile coating liquid of the present invention will not damage battery surface, will not react with battery surface, formed and applied
Have excellent chemical stability after film, also effectively increases the hardness and toughness of soft package lithium battery.
Therefore, compared with prior art, present invention has an advantage that
(1) formula of the method for present invention raising soft package lithium battery hardness and toughness is simple, and cost of material is low, operating method
Simply, process stabilizing can be applicable.
(2) film coated surface made from the method for present invention raising soft package lithium battery hardness and toughness is smooth, no flake, needle
The defects of hole, dark bubble, and wearability, impact resistance, chemical stability are excellent, adhesive force is strong, will not send out under electrolyte effect
Raw phenomena such as dissolving, expand, falling off.The soft package lithium battery hardness for being coated with film of the present invention is higher, toughness is more preferable, can prevent
Only there is the bad orders phenomenon such as scratch, fold, concave point in its surface.Film compactness of the present invention is strong simultaneously, and water absorption rate is low,
Water-resistance is strong, good airproof performance, moisture-proof, effective protection soft package lithium battery, extends soft package lithium battery service life；In addition, of the invention
The ability of soft package lithium battery anti-vibration, shock can be improved in method, shows higher security performance.
Specific embodiment
The present invention is further described below by way of specific embodiment, but the present invention is not limited only to following embodiment.?
It in the scope of the present invention or is not departing from the contents of the present invention, in spirit and scope, the present invention is suitably modified, is replaced
The identical component of effect, it will become apparent to those skilled in the art that they are considered as including of the invention
Within the scope of.
Acrylic acid modified alkyd resin of the present invention, rosin modified alkyd resin, Lauxite (No. CAS: 9011-05-
6) and polyether-ether-ketone is conventional commercial commodity.
The method that embodiment 1, the present invention improve soft package lithium battery hardness and toughness
The preparation of S1, coating liquid: it is to stir 3min under 800rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.2% acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is heated to 65 DEG C, stirs 20min, so
The use of vinegar acid for adjusting pH value is afterwards 4, stops heating, continues to add solvent to adjust system viscosity as 3000cps, then stir
10min obtains coating liquid；
The weight ratio of the acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is 1:0.6:0.2；
The solvent is the mixed liquor of ethylene glycol and tetrahydrofuran, and the weight ratio of the ethylene glycol and tetrahydrofuran is 2:1.
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
It is stood under room temperature to coating liquid drying, i.e., forms film on soft package lithium battery surface.It can be effectively improved by the method for the film
The hardness and toughness of soft package lithium battery.
The method that embodiment 2, the present invention improve soft package lithium battery hardness and toughness
The preparation of S1, coating liquid: it is to stir 6min under 1000rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.3% rosin modified alkyd resin, Lauxite and polyether-ether-ketone is heated to 75 DEG C, stirs 40min, then
The use of vinegar acid for adjusting pH value is 6, stops heating, continues to add solvent to adjust system viscosity as 5000cps, then stir
30min obtains coating liquid；
The weight ratio of the rosin modified alkyd resin, Lauxite and polyether-ether-ketone is 1:0.9:0.6；
The solvent is the mixed liquor of propylene glycol and tetrahydrofuran, and the weight ratio of the propylene glycol and tetrahydrofuran is 4:1.
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
80~90 DEG C of bakings are stood dry to coating liquid under vacuum state, i.e., form film on soft package lithium battery surface.Pass through the film
Method can effectively improve the hardness and toughness of soft package lithium battery.
The method that embodiment 3, the present invention improve soft package lithium battery hardness and toughness
The preparation of S1, coating liquid: it is to stir 5min under 900rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.2% acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is heated to 70 DEG C, stirs 30min, so
The use of vinegar acid for adjusting pH value is afterwards 5, stops heating, continues to add solvent to adjust system viscosity as 4000cps, then stir
20min obtains coating liquid；
The weight ratio of the acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is 1:0.8:0.4；
The solvent is the mixed liquor of propylene glycol and tetrahydrofuran, and the weight ratio of the propylene glycol and tetrahydrofuran is 3:1.
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
It is stood under room temperature to coating liquid drying, i.e., forms film on soft package lithium battery surface.It can be effectively improved by the method for the film
The hardness and toughness of soft package lithium battery.
The method that embodiment 4, the present invention improve soft package lithium battery hardness and toughness
The preparation of S1, coating liquid: it is to stir 5min under 900rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.2% rosin modified alkyd resin, Lauxite and polyether-ether-ketone is heated to 70 DEG C, stirs 30min, then
The use of vinegar acid for adjusting pH value is 5, stops heating, continues to add solvent to adjust system viscosity as 4000cps, then stir
20min obtains coating liquid；
The weight ratio of the rosin modified alkyd resin, Lauxite and polyether-ether-ketone is 1:0.8:0.4；
The solvent is the mixed liquor of propylene glycol and tetrahydrofuran, and the weight ratio of the propylene glycol and tetrahydrofuran is 3:1.
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
80~90 DEG C of bakings are stood dry to coating liquid under vacuum state, i.e., form film on soft package lithium battery surface.Pass through the film
Method can effectively improve the hardness and toughness of soft package lithium battery.
The method that embodiment 5, the present invention improve soft package lithium battery hardness and toughness
The preparation of S1, coating liquid: it is to stir 5min under 900rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.2% acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is heated to 70 DEG C, stirs 30min, so
The use of vinegar acid for adjusting pH value is afterwards 5, stops heating, continues to add solvent to adjust system viscosity as 4000cps, then stir
20min obtains coating liquid；
The weight ratio of the acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is 1:0.6:0.6；
The solvent is the mixed liquor of propylene glycol and tetrahydrofuran, and the weight ratio of the propylene glycol and tetrahydrofuran is 3:1.
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
It is stood under room temperature to coating liquid drying, i.e., forms film on soft package lithium battery surface.It can be effectively improved by the method for the film
The hardness and toughness of soft package lithium battery.
The method that embodiment 6, the present invention improve soft package lithium battery hardness and toughness
The preparation of S1, coating liquid: it is to stir 5min under 900rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.2% acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is heated to 70 DEG C, stirs 30min, so
The use of vinegar acid for adjusting pH value is afterwards 5, stops heating, continues to add solvent to adjust system viscosity as 4000cps, then stir
20min obtains coating liquid；
The weight ratio of the acrylic acid modified alkyd resin, Lauxite and polyether-ether-ketone is 1:0.9:0.2；
The solvent is the mixed liquor of propylene glycol and tetrahydrofuran, and the weight ratio of the propylene glycol and tetrahydrofuran is 3:1.
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface,
It is stood under room temperature to coating liquid drying, i.e., forms film on soft package lithium battery surface.It can be effectively improved by the method for the film
The hardness and toughness of soft package lithium battery.
Comparative example 1
The embodiment 1 of referenced patent document CN 105111903A, but do not add defoaming agent and levelling agent.Specifically:
(1) preparation of coating liquid: it is to stir 5min under 1000rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.25% acrylic acid modified alkyd resin, phenol aldehyde modified epoxy resin and polyether-ether-ketone is heated to 60 DEG C, stirring
30min stops heating, continues to add solvent to adjust system viscosity as 5000cps, then stirs 20min and obtain coating liquid；
The solvent is the mixture of acetone and butyl acetate, and the weight ratio of the acetone and butyl acetate is 10:1；
The weight ratio of the acrylic acid modified alkyd resin, phenol aldehyde modified epoxy resin and polyether-ether-ketone is 1:1.2:0.4.
(2) preparation of film: by coating liquid obtained in step (1) using spray gun even application in soft package lithium battery table
Face stands at normal temperature to coating liquid drying, i.e., forms film on soft package lithium battery surface.
Comparative example 2
The embodiment 1 of referenced patent document CN 105111903A, but defoaming agent and levelling agent are not added, and to solvent
It is replaced.Specifically:
(1) preparation of coating liquid: it is to stir 5min under 1000rpm by solvent low whipping speed, is subsequently added into weight of solvent
The composition of 0.25% acrylic acid modified alkyd resin, phenol aldehyde modified epoxy resin and polyether-ether-ketone is heated to 60 DEG C, stirring
30min stops heating, continues to add solvent to adjust system viscosity as 5000cps, then stirs 20min and obtain coating liquid；
The solvent is the mixed liquor of propylene glycol and tetrahydrofuran, and the weight ratio of the propylene glycol and tetrahydrofuran is 3:1.
The weight ratio of the acrylic acid modified alkyd resin, phenol aldehyde modified epoxy resin and polyether-ether-ketone is 1:1.2:0.4.
(2) preparation of film: by coating liquid obtained in step (1) using spray gun even application in soft package lithium battery table
Face stands at normal temperature to coating liquid drying, i.e., forms film on soft package lithium battery surface.
Comparative example 3
Compared with Example 3, the difference of this comparative example is only that: the composition of Lauxite and polyether-ether-ketone, institute is added
The weight ratio for stating Lauxite and polyether-ether-ketone is 0.8:0.4.
Comparative example 4
Compared with Example 3, the difference of this comparative example is only that: acrylic acid modified alkyd resin and Lauxite is added
The weight ratio of composition, the acrylic acid modified alkyd resin and Lauxite is 1:0.8.
Comparative example 5
Compared with Example 3, the difference of this comparative example is only that: the solvent is propylene glycol.
Comparative example 6
Compared with Example 3, the difference of this comparative example is only that: the propylene glycol and the weight ratio of tetrahydrofuran are 1:1.
Comparative example 7
Compared with Example 3, the difference of this comparative example is only that: not adjusting pH value this operation.
Test example one
(1) test method:
1, pencil hardness test: hardness of paint film is measured according to GB/T 6739-2006 paint and varnish pencil method, is successively used
The pencil of 4B, 3B, 2B, HB, F, H, 2H, 3H and 4H carry out pencil hardness test.
2, abrasion test: according to the measurement rotation rubber grinding wheel method of GB/T 1768-2006 paint and varnish wearability,
Use 100#Quartzy grinding wheel measurement.
3, impact resistance is tested: being tested according to GB/T 20624.2-2006 paint and varnish rapid deformation (impact resistance)
Part 2 is placed on 0.50mm ± 0.05mm tinplate, and impact is 12.7mm, the long 1m of conduit using spherical punch diameter
~1.2m.
4, adhesion test: according to the cross cut test of GB/T 9286-1998 paint and varnish paint film, the test is carried out.
5, antiacid mist corrosion test: according to GB/T 10125-2012 artificial atmosphere corrosion test salt spray test, using neutrality
Salt spray test (NSS) test, the test period be for 24 hours, 48h, 72h, 96h, 144h, 168h, 192h, 216h, 240h, 264h,
288h, 312h and 336h.According to film blistering or rust staining amount come judge anticorrosion film by corrosion condition, if film 144h
Start to occur blistering or rust staining stops test, records 144h as film salt fog resistance corrosion test result；If test 336 hours
Do not occur blistering yet afterwards or rust staining, then stops testing, film salt fog resistance test result is denoted as 336 hours.
6, water-resistance is tested: weighing test specimen m1, then test specimen is immersed to 168 ± 2h in 23 ± 2 DEG C of water, filter paper is used in taking-up
The water stain of surface is blotted, weighs m immediately2, test specimen completed in 1min from being fetched into weighing in water and finish.
Water absorption rate is calculated according to following formula: Wm=[(m2-m1)/m1] × 100%
In formula: Wm--- water absorption rate, %；m1--- test specimen quality, g before soaking；m2--- test specimen quality after immersion, g；
Test result takes the arithmetic mean of instantaneous value of 3 test specimens, as a result calculates and is accurate to 0.1%.
Performance is carried out to soft package lithium battery film made from Examples 1 to 8 and comparative example 1~4 using above-mentioned test method
Test, while observing the surface appearance of film.Wherein test method 1~3,5 and 6 is according to GB/T 9271-2008 (colored paint and clear
Paint standard test plate (panel)) use aluminium sheet preparation standard test plate (panel) to use the preparation method of Examples 1 to 6 and comparative example 1~7 is obtained to apply again
Film is tested；Test method 4, which is directly taken, to be prepared with the soft package lithium battery of film and is tested.
(2) test result: concrete outcome see the table below 1:
Each soft package lithium battery film performance testing result of table 1
From upper table 1:
(1) film coated surface made from 1~6 method of the embodiment of the present invention is smooth, has excellent performance, and hardness is high, thus can mention
The hardness of high soft package lithium battery；Its adhesive force is strong, adhesiveness is good, and wearability and excellent impact resistance illustrate the good toughness of film,
The toughness of soft package lithium battery can thus be improved；And its chemical stability is high, and dissolution, swollen will not occur in antiacid mist corrosion test
Swollen, phenomena such as falling off, good corrosion resistance；Its water absorption rate is low simultaneously, and water-resistance is strong, effectively moisture-proof.In Examples 1 to 6, embodiment
Each performance indicator of film made from 3 is optimal, so embodiment 3 is preferred forms of the invention.
(2) comparative example 1 is the prior art, and in the case where not adding defoaming agent and levelling agent, gained film coated surface has greatly
The defects of measuring flake, pin hole, dark bubble, and each performance of film is declined；Comparative example 2 is all the prior art, is not being added
Defoaming agent and levelling agent, and in the case where replacement solvent of the present invention, gained film coated surface has a small amount of flake, pin hole, dark bubble etc. to lack
It falls into, and each performance of film is also declined.
(3) compared with Example 3, comparative example 3 and comparative example 4 lack a certain kind in composition described in embodiment 3
The performance of component, gained film is not so good as embodiment 3, and film coated surface is defective, illustrate acrylic acid modified alkyd resin,
There is synergistic effect in Lauxite and polyether-ether-ketone three.
(4) compared with Example 3, comparative example 5 be used alone propylene glycol as solvent, comparative example 6 change propylene glycol with
The performance of the weight ratio of tetrahydrofuran, gained film is also not so good as embodiment 3, illustrates propylene glycol of the present invention and tetrahydrofuran
Combination and its weight ratio can promote the phase of alkyd resin of the present invention, Lauxite and polyetherether ketone composition well
Cementing closes, and especially promotes the combination that mixes of acrylic acid modified alkyd resin, Lauxite and polyetherether ketone composition, thus shape
At film haveing excellent performance, suitable for soft package lithium battery.
(5) compared with Example 3, comparative example 7 does not adjust pH value this operation, as a result gained hardness of film, wearability,
The performances such as impact resistance are not so good as embodiment 3, illustrate that the present invention adjusts pH value to 4~6 this operation and can promote alkyd well
Resin, Lauxite and polyetherether ketone composition crosslinking combine, the film for forming stable structure, haveing excellent performance, to improve Soft Roll
The hardness and toughness of lithium battery.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (8)
1. a kind of method for improving soft package lithium battery hardness and toughness, which comprises the following steps:
The preparation of S1, coating liquid: it is to stir 3~6min under 800~1000rpm by solvent low whipping speed, is subsequently added into solvent
The composition of the alkyd resin of weight 0.2~0.3%, Lauxite and polyether-ether-ketone, is heated to 65~75 DEG C, and stirring 20~
40min, then adjust pH value be 4~6, stop heating, continue add solvent with adjust system viscosity be 3000~5000cps,
Then 10~30min of stirring obtains coating liquid；
The preparation of S2, film: by coating liquid made from step S1 using spray gun even application on soft package lithium battery surface, in room temperature
Lower standing or under vacuum conditions 80~90 DEG C of bakings are stood to coating liquid drying, i.e., form film on soft package lithium battery surface.
2. the method according to claim 1 for improving soft package lithium battery hardness and toughness, which is characterized in that the alkyd tree
The weight ratio of rouge, Lauxite and polyether-ether-ketone is 1:(0.6~0.9): (0.2~0.6).
3. the method according to claim 2 for improving soft package lithium battery hardness and toughness, which is characterized in that the alkyd tree
The weight ratio of rouge, Lauxite and polyether-ether-ketone is 1:0.8:0.4.
4. the method according to claim 1 for improving soft package lithium battery hardness and toughness, which is characterized in that the alkyd tree
Rouge is acrylic acid modified alkyd resin or rosin modified alkyd resin.
5. the method according to claim 1 for improving soft package lithium battery hardness and toughness, which is characterized in that the solvent is
The mixed liquor of ethylene glycol and tetrahydrofuran, or the mixed liquor for propylene glycol and tetrahydrofuran.
6. the method according to claim 5 for improving soft package lithium battery hardness and toughness, which is characterized in that the ethylene glycol
Weight ratio with tetrahydrofuran is (2~4): 1.
7. the method according to claim 5 for improving soft package lithium battery hardness and toughness, which is characterized in that the propylene glycol
Weight ratio with tetrahydrofuran is (2~4): 1.
8. the method according to claim 1 for improving soft package lithium battery hardness and toughness, which is characterized in that the step S1
In, use vinegar acid for adjusting pH value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479521A (en) * | 2019-07-02 | 2019-11-22 | 深圳名飞远科技有限公司 | A kind of ultra-thin lithium ion one-shot battery hardness reinforcement coating layer brushing stiffening device |
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| CN102653656A (en) * | 2012-04-19 | 2012-09-05 | 珠海格力新能源科技有限公司 | Method for improving hardness and toughness of flexibly-packaged battery |
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| CN104449283A (en) * | 2014-11-14 | 2015-03-25 | 无锡中洁能源技术有限公司 | Anti-aging coating and preparation method thereof |
| CN105111903A (en) * | 2015-09-08 | 2015-12-02 | 深圳电丰电子有限公司 | Preparation method for coating film capable of enhancing hardness and toughness of soft package lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110479521A (en) * | 2019-07-02 | 2019-11-22 | 深圳名飞远科技有限公司 | A kind of ultra-thin lithium ion one-shot battery hardness reinforcement coating layer brushing stiffening device |
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| CN108948984B (en) | 2020-07-07 |
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