CN115011267A - Lithium ion battery thickness swelling adhesive tape and production method thereof - Google Patents

Lithium ion battery thickness swelling adhesive tape and production method thereof Download PDF

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Publication number
CN115011267A
CN115011267A CN202210699836.XA CN202210699836A CN115011267A CN 115011267 A CN115011267 A CN 115011267A CN 202210699836 A CN202210699836 A CN 202210699836A CN 115011267 A CN115011267 A CN 115011267A
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lithium ion
ion battery
pressure
sensitive adhesive
swelling
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Inventor
万中梁
李奎
梁龙
李鑫
刘杰
刘伟
汪峰
朱润雨
张东星
乐海霞
方超超
赵鑫宇
夏金明
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Wuhu Huishi New Material Technology Co ltd
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Wuhu Huishi New Material Technology Co ltd
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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
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • 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
    • 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
    • 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
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • 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
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00—Presence of polyester
    • C09J2467/005—Presence of polyester in the release coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2475/00—Presence of polyurethane
    • C09J2475/006—Presence of polyurethane in the substrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a lithium ion battery thickness swelling adhesive tape and a production method thereof.A base film is physically stretched in the length and width directions, so that macromolecular chains in the length and width directions are not folded, and the macromolecular chains are folded only in the thickness direction, thereby swelling the base film only in the thickness direction and filling gaps in an all-around manner. The swelling multiplying power of the lithium ion battery thickness swelling adhesive tape produced by the invention in the thickness direction can reach more than 4 times.

Description

Lithium ion battery thickness swelling adhesive tape and production method thereof
Technical Field
The invention belongs to the technical field of lithium ion battery swelling adhesive tapes, and particularly relates to a lithium ion battery thickness swelling adhesive tape and a production method thereof.
Background
When the cylindrical battery is assembled, a certain gap exists between the battery core and the cylindrical shell, if the battery core cannot be effectively fixed in the shell, the battery core can move in the shell after vibration or external impact occurs, and then the internal resistance of the battery is increased or the electrode plates are damaged, so that the performance of the battery is greatly deteriorated. In the prior art, the swelling adhesive tape is filled to solve the problem, and the adhesive tape is also the swelling adhesive tape in the length and width directions, and the gap is filled by forming a fold after the swelling adhesive tape is swelled, but the gap in the cylindrical battery cannot be filled in all directions.
Disclosure of Invention
In order to solve the technical problems, the invention provides a production method of a lithium ion battery thickness swelling adhesive tape, which can realize swelling only in the thickness direction, can fill gaps between a battery cell and a cylindrical shell in an omnibearing manner, and has better shockproof and anti-falling effects.
The technical scheme adopted by the invention is as follows:
a production method of a lithium ion battery thickness swelling tape comprises the following steps:
(1) stretching the base film in the length and width directions, and then carrying out corona treatment;
(2) coating a pressure-sensitive adhesive on the release surface of the release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) compounding and curing the pressure-sensitive adhesive layer and the base film subjected to corona to obtain the lithium ion battery thickness swelling adhesive tape;
in the step (1), the base film is deformed and swelled in the length, width and thickness directions after contacting with the electrolyte.
In the step (1), the stretch deformation amounts in the longitudinal and transverse directions are all 200%, and the stretch deformation amount is the length after stretching/the length before stretching × 100%.
In the step (1), a battery separator manufacturing apparatus is used for drawing.
In the step (1), the thickness of the base film is 50 to 200 μm.
In the step (1), the swelling ratios of deformation and swelling in the length, width and thickness directions after the base film is contacted with the electrolyte are respectively 170 percent (120-), (170 percent (120-) and 170 percent (110-), (110-)).
In the step (1), the dyne value of the base film after corona treatment is more than or equal to 52 dynes, and if the corona value is too low, the combination of the base layer and the pressure-sensitive adhesive layer is not firm, so that the degumming phenomenon is easy to occur.
In the step (2), the pressure-sensitive adhesive is a pressure-sensitive adhesive which is insoluble after being soaked in the electrolyte and still has viscosity in the electrolyte environment.
In the step (2), the thickness of the pressure-sensitive adhesive layer is 3-20 μm.
In the step (2), the release film is a PET single-sided silicon release film; the thickness of the PET single-sided silicon release film is 15-30 μm.
In the step (3), the curing conditions are as follows: curing at 50 deg.C for 48-72h, and cooling for more than 6h to fully compound the substrate layer and the pressure-sensitive adhesive layer.
The invention also provides a lithium ion battery thickness swelling adhesive tape which is produced by the production method.
According to the production method of the lithium ion battery thickness swelling adhesive tape, provided by the invention, the base film is physically stretched in the length and width directions, so that the macromolecular chains in the length and width directions are not folded, and the macromolecular chains are folded only in the thickness direction, so that the base film is swelled only in the thickness direction, and gaps are filled in all directions. The swelling multiplying power of the lithium ion battery thickness swelling adhesive tape produced by the invention in the thickness direction can reach more than 4 times.
Detailed Description
The present invention will be described in detail with reference to examples.
The pressure-sensitive adhesive used in each example is Kunmushan Chimonanthus nitens 8243, the curing and drying conditions are 130 ℃, 0.5-3min, and the thickness of the pressure-sensitive adhesive layer is 10-15 μm.
The manufacturing equipment of the battery diaphragm is a PP/PE lithium battery diaphragm production line manufactured by Suzhou Jinweil mechanical Co.
Example 1
A production method of a lithium ion battery thickness swelling adhesive tape comprises the following steps:
(1) stretching the base film in the length direction and the width direction by using manufacturing equipment of a battery diaphragm, wherein the deformation in the length direction is 160 percent, the deformation in the width direction is 160 percent, and then carrying out corona treatment, wherein the corona value of the base film is more than or equal to 52 dyne; wherein the base film is the base film prepared by the method in preparation example 1 in CN 105238286A;
(2) coating a pressure-sensitive adhesive on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) and compounding the pressure-sensitive adhesive layer with the base film subjected to corona treatment, curing at 50 ℃ for 48 hours, and cooling for 6 hours to obtain the lithium ion battery thickness swelling adhesive tape.
Example 2
A production method of a lithium ion battery thickness swelling adhesive tape comprises the following steps:
(1) stretching a base film in the length direction and the width direction by using manufacturing equipment of a battery diaphragm, wherein the deformation in the length direction is 170%, the deformation in the width direction is 170%, and then carrying out corona treatment, wherein the corona value of the base film is more than or equal to 52 dynes; wherein the base film is the base film prepared by referring to the method for preparing the base layer in CN111518481A in example 1;
(2) coating a pressure-sensitive adhesive on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) and compounding the pressure-sensitive adhesive layer with the base film subjected to corona, curing at 50 ℃ for 48h, and cooling for 6h to obtain the lithium ion battery thickness swelling adhesive tape.
Example 3
A production method of a lithium ion battery thickness swelling adhesive tape comprises the following steps:
(1) stretching the base film in the length direction and the width direction by using manufacturing equipment of a battery diaphragm, wherein the deformation in the length direction is 190 percent, the deformation in the width direction is 190 percent, and then carrying out corona treatment, wherein the corona value of the base film is more than or equal to 52 dynes; wherein the base film is prepared by the method in the example 7 in the reference CN 113604159A;
(2) coating a pressure-sensitive adhesive on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) and compounding the pressure-sensitive adhesive layer with the base film subjected to corona, curing at 50 ℃ for 48h, and cooling for 6h to obtain the lithium ion battery thickness swelling adhesive tape.
Example 4
A production method of a lithium ion battery thickness swelling adhesive tape comprises the following steps:
(1) stretching the base film in the length direction and the width direction by using manufacturing equipment of a battery diaphragm, wherein the deformation in the length direction is 190 percent, the deformation in the width direction is 190 percent, and then carrying out corona treatment, wherein the corona value of the base film is more than or equal to 52 dynes; wherein the base film is prepared by the method in the example 8 in the reference CN 113604159A;
(2) coating a pressure-sensitive adhesive on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) and compounding the pressure-sensitive adhesive layer with the base film subjected to corona, curing at 50 ℃ for 48h, and cooling for 6h to obtain the lithium ion battery thickness swelling adhesive tape.
Example 5
A production method of a lithium ion battery thickness swelling adhesive tape comprises the following steps:
(1) stretching the base film in the length and width directions by using battery diaphragm manufacturing equipment, wherein the deformation in the length direction is 190%, the deformation in the width direction is 190%, and then carrying out corona treatment, wherein the corona value of the base film is more than or equal to 52 dynes; wherein the base film is prepared according to the method in example 8 of CN113604159A but with the same amount of polystyrene substituted for polycaprolactone in the base material formulation;
(2) coating a pressure-sensitive adhesive on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) and compounding the pressure-sensitive adhesive layer with the base film subjected to corona, curing at 50 ℃ for 48h, and cooling for 6h to obtain the lithium ion battery thickness swelling adhesive tape.
Comparative example 1
The swelling adhesive tape for the lithium ion battery sequentially comprises the following components from bottom to top: swellable base layer, first pressure sensitive adhesive layer, wherein the swellable base layer is prepared according to the method in preparation example 1 in CN 105238286A.
The preparation method of the swelling adhesive tape for the lithium ion battery comprises the following steps:
(1) coating pressure-sensitive adhesive glue on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a first pressure-sensitive adhesive layer;
(2) and (3) carrying out corona treatment on the swellable substrate layer, compounding the swellable substrate layer with a corona value not less than 52 dyne and the first pressure-sensitive adhesive layer, and curing at 50 ℃ for 48 hours to obtain the lithium ion battery swelling adhesive tape.
Comparative example 2
The swelling adhesive tape for the lithium ion battery sequentially comprises the following components from bottom to top: swellable base layer, first pressure sensitive adhesive layer, wherein the swellable base layer is prepared according to the method in preparation example 1 in CN 111518481A.
The preparation method of the swelling adhesive tape for the lithium ion battery comprises the following steps:
(1) coating pressure-sensitive adhesive glue on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a first pressure-sensitive adhesive layer;
(2) and (3) carrying out corona treatment on the swellable substrate layer, compounding the swellable substrate layer with a corona value not less than 52 dyne and the first pressure-sensitive adhesive layer, and curing at 50 ℃ for 48 hours to obtain the lithium ion battery swelling adhesive tape.
Comparative example 3
The swelling adhesive tape for the lithium ion battery sequentially comprises the following components from bottom to top: a swellable base layer, a first pressure sensitive adhesive layer, wherein the swellable base layer is prepared with reference to the method in example 7 in CN 113604159A.
The preparation method of the swelling adhesive tape for the lithium ion battery comprises the following steps:
(1) coating pressure-sensitive adhesive glue on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a first pressure-sensitive adhesive layer;
(2) and (3) carrying out corona treatment on the swellable substrate layer, compounding the swellable substrate layer with a corona value not less than 52 dyne and the first pressure-sensitive adhesive layer, and curing at 50 ℃ for 48 hours to obtain the lithium ion battery swelling adhesive tape.
Comparative example 4
The swelling adhesive tape for the lithium ion battery sequentially comprises the following components from bottom to top: swellable base layer, first pressure sensitive adhesive layer, wherein the swellable base layer is prepared by the method in example 8 in reference to CN 113604159A.
The preparation method of the swelling adhesive tape for the lithium ion battery comprises the following steps:
(1) coating pressure-sensitive adhesive glue on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a first pressure-sensitive adhesive layer;
(2) and (3) carrying out corona treatment on the swellable substrate layer, compounding the swellable substrate layer with a corona value not less than 52 dyne and the first pressure-sensitive adhesive layer, and curing at 50 ℃ for 48 hours to obtain the lithium ion battery swelling adhesive tape.
Comparative example 5
The swelling adhesive tape for the lithium ion battery sequentially comprises the following components from bottom to top: swellable base layer, first pressure sensitive adhesive layer, wherein the swellable base layer is prepared as in example 8 with reference to CN113604159A but with the polycaprolactone in the substrate formulation replaced by an equal amount of polystyrene.
The preparation method of the swelling adhesive tape for the lithium ion battery comprises the following steps:
(1) coating pressure-sensitive adhesive glue on the release surface of the PET single-sided silicon release film, and curing and drying to obtain a first pressure-sensitive adhesive layer;
(2) and (3) carrying out corona treatment on the swellable substrate layer, compounding the swellable substrate layer with a corona value not less than 52 dyne and the first pressure-sensitive adhesive layer, and curing at 50 ℃ for 48 hours to obtain the lithium ion battery swelling adhesive tape.
The swelling values of the tapes of the above examples and comparative examples in electrolytes of different temperatures were tested.
The total thickness test method refers to GB/T7125-.
The test method for swelling at 45 ℃ is as follows: 1) the total thickness h0 of the reference GB/T7125-; 2) cutting the test sample into 50mm by 50mm size to prepare 5 pieces; 3) placing the cut adhesive tape into a PE bottle, pouring an electrolyte which is SG202C1 of the Anhui Shengge energy science and technology Limited company into the PE bottle, and baking the adhesive tape for 36 hours at the temperature of 45 ℃; 4) then taking out the sample, flattening the sample, testing the length a and the width b of the sample by using a 30cm steel ruler, and simultaneously testing the thickness h1 of the sample after the electrolyte is soaked and baked according to the GB/T7125-2014 standard; 5) the swelling ratio in the thickness direction was h1/h0 × 100%, the swelling ratio in the length direction was a/50 × 100%, and the swelling ratio in the width direction was b/50 × 100%.
The test method of swelling at 50 ℃ is the same as the test method of swelling at 45 ℃ except that the baking temperature and time in step 3) are changed to baking at 50 ℃ for 96 hours.
The test method of swelling at 60 ℃ is the same as the test method of swelling at 45 ℃ except that the baking temperature and time in step 3) are changed to baking in an environment of 60 ℃ for 48 hours.
The test method of swelling at 85 ℃ is the same as the test method of swelling at 45 ℃ except that the baking temperature and time in step 3) are changed to baking at 85 ℃ for 4 hours.
The test results are shown in table 1.
TABLE 1
Figure BDA0003703580850000081
The above detailed description of a lithium ion battery thickness swelling tape and a method for producing the same with reference to examples is illustrative and not restrictive, and several examples may be cited within the scope of the present invention, so that variations and modifications thereof without departing from the general inventive concept shall fall within the scope of the present invention.

Claims (10)

1. The production method of the lithium ion battery thickness swelling adhesive tape is characterized by comprising the following steps:
(1) stretching the base film in the length and width directions, and then carrying out corona treatment;
(2) coating a pressure-sensitive adhesive on the release surface of the release film, and curing and drying to obtain a pressure-sensitive adhesive layer;
(3) compounding and curing the pressure-sensitive adhesive layer and the base film subjected to corona to obtain the lithium ion battery thickness swelling adhesive tape;
in the step (1), the base film is deformed and swelled in the length, width and thickness directions after contacting with the electrolyte.
2. The method for producing the lithium ion battery thickness swelling tape according to claim 1, wherein in the step (1), the tensile deformation amounts in the length and width directions are all 100-200%.
3. The method for producing the lithium ion battery thickness swelling tape according to claim 1 or 2, wherein in the step (1), the stretching process is performed using a battery separator manufacturing apparatus.
4. The method for producing the lithium ion battery thickness swelling tape according to claim 1 or 2, wherein in the step (1), the thickness of the base film is 50 to 200 μm.
5. The method for producing the lithium ion battery thickness swelling tape according to claim 1 or 2, wherein in the step (1), the swelling rates of deformation and swelling in the length, width and thickness directions of the base film after contacting the electrolyte solution are respectively 120-170%, 120-170% and 110-170%.
6. The production method of the lithium ion battery thickness swelling tape according to claim 1 or 2, wherein in the step (1), the dyne value of the base film after corona treatment is not less than 52 dynes.
7. The method for producing the lithium ion battery thickness swelling tape according to claim 1, wherein in the step (2), the pressure-sensitive adhesive is a pressure-sensitive adhesive which does not dissolve after being soaked in the electrolyte and remains tacky in the electrolyte environment.
8. The method for producing the lithium ion battery thickness swelling tape according to claim 1, wherein in the step (2), the thickness of the pressure-sensitive adhesive layer is 3 to 20 μm.
9. The production method of the lithium ion battery thickness swelling tape according to claim 1, wherein in the step (2), the release film is a PET single-sided silicon release film; the thickness of the PET single-sided silicon release film is 15-30 μm.
10. A lithium ion battery thickness swelling tape, characterized in that the lithium ion battery thickness swelling tape is produced by the production method of any one of claims 1 to 9.
CN202210699836.XA 2022-06-20 2022-06-20 Lithium ion battery thickness swelling adhesive tape and production method thereof Pending CN115011267A (en)

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Publication number Priority date Publication date Assignee Title
CN1984764A (en) * 2004-05-14 2007-06-20 帝人杜邦薄膜日本有限公司 Oriented polyester film
US20090325005A1 (en) * 2006-07-20 2009-12-31 Gijsbertus Hendrikus Maria Calis Electrolytic membrane
CN111995957A (en) * 2020-08-18 2020-11-27 澳中新材料科技(韶关)有限公司 Oriented polystyrene expansion adhesive tape with high expansion ratio and preparation method thereof
CN114181634A (en) * 2021-12-06 2022-03-15 深圳宏瑞新材料股份有限公司 Expansion adhesive tape for lithium battery cell
CN114316829A (en) * 2021-12-31 2022-04-12 东莞澳中新材料科技股份有限公司 Easily-identified and easily-unwound composite expansion adhesive tape and preparation method thereof
CN216550252U (en) * 2021-12-27 2022-05-17 东莞澳中新材料科技股份有限公司 High-temperature-resistant high-swelling-ratio swelling adhesive tape with multiple swelling layers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1984764A (en) * 2004-05-14 2007-06-20 帝人杜邦薄膜日本有限公司 Oriented polyester film
US20090325005A1 (en) * 2006-07-20 2009-12-31 Gijsbertus Hendrikus Maria Calis Electrolytic membrane
CN111995957A (en) * 2020-08-18 2020-11-27 澳中新材料科技(韶关)有限公司 Oriented polystyrene expansion adhesive tape with high expansion ratio and preparation method thereof
CN114181634A (en) * 2021-12-06 2022-03-15 深圳宏瑞新材料股份有限公司 Expansion adhesive tape for lithium battery cell
CN216550252U (en) * 2021-12-27 2022-05-17 东莞澳中新材料科技股份有限公司 High-temperature-resistant high-swelling-ratio swelling adhesive tape with multiple swelling layers
CN114316829A (en) * 2021-12-31 2022-04-12 东莞澳中新材料科技股份有限公司 Easily-identified and easily-unwound composite expansion adhesive tape and preparation method thereof

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Application publication date: 20220906