CN114181634A - Expansion adhesive tape for lithium battery cell - Google Patents
Expansion adhesive tape for lithium battery cell Download PDFInfo
- Publication number
- CN114181634A CN114181634A CN202111475411.2A CN202111475411A CN114181634A CN 114181634 A CN114181634 A CN 114181634A CN 202111475411 A CN202111475411 A CN 202111475411A CN 114181634 A CN114181634 A CN 114181634A
- Authority
- CN
- China
- Prior art keywords
- coating
- film
- roller
- coating liquid
- adhesive tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 34
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 301
- 239000011248 coating agent Substances 0.000 claims abstract description 293
- 239000007788 liquid Substances 0.000 claims abstract description 89
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000003292 glue Substances 0.000 claims abstract description 42
- 238000003851 corona treatment Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229920006267 polyester film Polymers 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 238000009501 film coating Methods 0.000 claims description 4
- 238000007759 kiss coating Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000010345 tape casting Methods 0.000 claims description 4
- 238000009736 wetting Methods 0.000 claims description 4
- 239000007888 film coating Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000004381 surface treatment Methods 0.000 abstract description 4
- 238000000643 oven drying Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 59
- 238000007789 sealing Methods 0.000 description 9
- 230000002238 attenuated effect Effects 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007785 strong electrolyte Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- 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
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
- B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- 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
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to the technical field of adhesive tapes for lithium battery cores, in particular to an expansion adhesive tape for lithium battery cores, which comprises a base material and glue, wherein the glue is arranged on the inner side surface of the base material, the core can be fixed by the expansion of the adhesive tape in the presence of electrolyte, the existing termination adhesive tape is replaced, the base material is formed by casting and coating CPP, OPS, TPU, PLA, PO and other films which are not acid-resistant and degradable, compared with other surface treatment modes, the coating does not need off-line rewinding, the coating is coated between longitudinal stretching and transverse stretching, and a transverse stretching section is used as an oven drying coating liquid, so that the production efficiency is high; and because the coating is even, the coating is thinner than off-line coating, and the coating effect is better, can show reduction coating cost, and film surface tension through corona treatment can decay gradually along with the time lapse, and film surface through coating treatment does not have the corona decay problem, chooses acrylic acid glue coating adaptability for use through glue, and drying rate is fast, and is strong to substrate adhesive force, and levelling nature and transparency are good.
Description
Technical Field
The invention relates to the technical field of adhesive tapes for lithium battery cores, in particular to an expansion adhesive tape for lithium battery cores.
Background
The lithium battery adhesive tape mainly adopts a polyester film as a base material, and acrylic acid glue is coated on the base material, and is mainly used for sticking and protecting the surface of an aluminum-plastic film in the production process of a soft package battery and a polymer lithium battery cell. High temperature resistance, no residual glue, scratch resistance and puncture resistance, and the product meets the ROHS standard. The battery tab adhesive tape is a key special insulating adhesive tape for producing a battery tab, is also a key material for producing the quality of a lithium polymer battery, adopts a polypropylene Film (PP, PET and PI films) as a base material, is coated with special acrylic glue for resisting lithium battery electrolyte on the base material, has the thickness of 0.016mm, 0.020mm, 0.03mm, 0.035mm, 0.04mm and 0.05mm, is specially used for insulating, fixing and protecting lithium ion cores and other parts, and has the characteristics of strong electrolyte resistance, high adhesion, softness, proper fit, environmental protection, no halogen and the like.
The existing termination adhesive tape is inconvenient to fix the battery core, so that the expansion adhesive tape for the battery core of the lithium battery is provided, the adhesive tape is expanded when encountering electrolyte, so that the battery core can be fixed, and the existing termination adhesive tape is replaced.
Disclosure of Invention
The invention aims to provide an expansion adhesive tape for a lithium battery cell, which is used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an inflation sticky tape for lithium cell electricity core, includes substrate and glue, the medial surface of substrate is provided with glue.
As a preferred embodiment of the present invention, the substrate: CPP, OPS, TPU, PLA, PO and other films which are not acid-resistant and degradable are formed by tape casting and coating; the substrate thickness is preferably: 10 to 50 μm.
As a preferred embodiment of the present invention, the coating process comprises: the coating solution is prepared into the coating solution for coating by stirring in a solution supply tank for a period of time, and the prepared coating solution is pumped into an intermediate charging bucket by a solution supply pump;
after the polyester film is longitudinally stretched by longitudinal stretching equipment, corona treatment is carried out on the surface of the film by corona equipment so as to improve the surface tension of the film and enhance the wetting performance, meanwhile, an intermediate pump pumps the coating liquid in an intermediate material tank into a closed scraper cavity, and a concave roller transfers the coating liquid in the cavity to the surface of the film through a contact wrap angle with the film so as to form a coating layer on the surface of the film; and (3) the film coated with the coating liquid enters transverse stretching equipment, and in a transverse stretching preheating section, the coating liquid volatilizes water in a drying process, and finally a uniform chemical treatment layer is formed on the surface of the film.
As a preferable aspect of the present invention, the thin film coating apparatus: the device comprises a coating liquid feeding device, a corona device, a kiss-coating guide roller, a coating scraper cavity, a coating concave roller, a coating rubber compression roller, an S-shaped guide roller and the like; the coating liquid is generally aqueous, and the basic components are water, a leveling agent (to uniformly disperse the coating liquid), a functional coating liquid (to provide the main function of the coating liquid), a curing agent (also called a cross-linking agent, which is cross-linked with the resin through a drying process to firmly bond the resin with the surface of the film), and a catalyst.
As a preferred embodiment of the present invention, the coating liquid supplying device: the prepared coating liquid is pumped into the intermediate tank from the liquid preparation tank and pumped into the scraper cavity from the intermediate tank;
the corona treatment device comprises: the coating device is positioned at the front end of the coating device and is used for performing corona treatment on the surface of the polyester film before coating to increase the surface tension of the film, so that the subsequent coating treatment is even in leveling and the coating liquid is firmly attached to the surface of the film;
the scraper cavity is characterized in that: the coating device comprises a cavity and a coating scraper, wherein the scraper cavity is tightly contacted with a coating concave roller in a working state, a coating liquid is transferred onto the coating concave roller, the coating scraper is used for removing redundant coating liquid on the coating roller to ensure that the coating liquid is uniformly distributed on the coating roller, and the replaceable coating scraper is usually made of stainless steel materials;
the coating roller comprises: the coating system comprises a metal roller with fine grooves on the surface, wherein each groove is arranged in a fine and close manner to form a honeycomb structure, coating liquid is brought into the grooves of the coating roller through a scraper cavity and then transferred to a film through the coating roller, the running direction of the coating roller needs to be set to be opposite to the advancing direction of the film in the coating process, and the purpose of transferring the coating liquid is achieved;
the coating rubber roller: the coating film can be lifted when not producing the coating film, so that the coating roller does not contact the casting sheet, and the casting sheet contacts the coating roller by pressing down the compression roller during production, thereby realizing coating; if a double-coated product is produced, the upper coating roll transfers the coating liquid to the surface of the rubber roll, from which it is transferred down to the cast sheet.
As a preferred embodiment of the present invention, the measurement of the coating thickness of the substrate is: the coating thickness that can be measured on-line means the wet coating thickness, i.e., the thickness of the coating liquid before drying; coating thickness (coating liquid consumption/coating area) coating consumption/coating width (TDO speed × measurement time) at a fixed time × coating length.
As the preferable scheme of the invention, the glue is acrylic glue, the preferable thickness is 2-50 μm, and the color of the glue can be changed by adding the pigment in the glue.
As a preferable scheme of the invention, the glue is coated on the inner side surface of the base material after coating and forming.
In a preferred embodiment of the present invention, the coefficient of expansion of the base material is between 20% and 300%.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the battery cell can be fixed by the expansion of the adhesive tape in the presence of electrolyte, the existing termination adhesive tape is replaced, and the base material is formed by casting and coating films which are not acid-resistant and degradable, such as CPP, OPS, TPU, PLA, PO and the like, compared with other surface treatment modes, the coating does not need to be rewound off line, the coating is coated between longitudinal stretching and transverse stretching, and a transverse stretching section is used as an oven drying coating liquid, so that the production efficiency is high; and because the coating is uniform, the coating is thinner than off-line coating, the coating effect is better, the coating cost can be obviously reduced, the surface tension of the film subjected to corona treatment can be gradually attenuated along with the time, the problem of corona attenuation does not exist on the surface of the film subjected to coating treatment, the coating adaptability is strong by selecting acrylic acid glue through glue, the drying speed is high, the adhesive force to the base material is strong, the leveling property and the transparency are good, the base material is formed by casting and coating films which are not acid-resistant and degradable, such as CPP, OPS, TPU, PLA, PO and the like, the base material has high strength, large rigidity and stable shape, has the characteristics of good glossiness and transparency, stronger tearing resistance, good moisture resistance, excellent heat resistance and easy heat sealing, and the shrinkage rate and the shrinkage stress of the base material are large, but the heat sealing performance and the heat sealing strength are poor, the shrinkage temperature is high, and the range is narrow.
Drawings
Fig. 1 is a schematic structural view of the expansion adhesive tape of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as the term "and/or" is used herein to encompass any and all combinations of one or more of the associated listed items.
Example (b): please refer to fig. 1, which illustrates an expansion tape for a lithium battery cell, including a substrate and glue, wherein the glue is disposed on an inner side surface of the substrate.
Base material: CPP, OPS, TPU, PLA, PO and other films which are not acid-resistant and degradable are formed by tape casting and coating; the substrate thickness is preferably: 10 to 50 μm.
The coating process comprises the following steps: the coating solution is prepared into the coating solution for coating by stirring in a solution supply tank for a period of time, and the prepared coating solution is pumped into an intermediate charging bucket by a solution supply pump;
after the polyester film is longitudinally stretched by longitudinal stretching equipment, corona treatment is carried out on the surface of the film by corona equipment so as to improve the surface tension of the film and enhance the wetting performance, meanwhile, an intermediate pump pumps the coating liquid in an intermediate material tank into a closed scraper cavity, and a concave roller transfers the coating liquid in the cavity to the surface of the film through a contact wrap angle with the film so as to form a coating layer on the surface of the film; and (3) the film coated with the coating liquid enters transverse stretching equipment, and in a transverse stretching preheating section, the coating liquid volatilizes water in a drying process, and finally a uniform chemical treatment layer is formed on the surface of the film.
Film coating equipment: the device comprises a coating liquid feeding device, a corona device, a kiss-coating guide roller, a coating scraper cavity, a coating concave roller, a coating rubber compression roller, an S-shaped guide roller and the like; the coating liquid is generally aqueous, and the basic components are water, a leveling agent (to uniformly disperse the coating liquid), a functional coating liquid (to provide the main function of the coating liquid), a curing agent (also called a cross-linking agent, which is cross-linked with the resin through a drying process to firmly bond the resin with the surface of the film), and a catalyst.
Coating liquid supply device: the prepared coating liquid is pumped into the intermediate tank from the liquid preparation tank and pumped into the scraper cavity from the intermediate tank;
a corona treatment device: the coating device is positioned at the front end of the coating device and is used for performing corona treatment on the surface of the polyester film before coating to increase the surface tension of the film, so that the subsequent coating treatment is even in leveling and the coating liquid is firmly attached to the surface of the film;
scraper cavity: the coating device comprises a cavity and a coating scraper, wherein the scraper cavity is tightly contacted with a coating concave roller in a working state, a coating liquid is transferred onto the coating concave roller, the coating scraper is used for removing redundant coating liquid on the coating roller to ensure that the coating liquid is uniformly distributed on the coating roller, and the replaceable coating scraper is usually made of stainless steel materials;
coating roll: the coating system comprises a metal roller with fine grooves on the surface, wherein each groove is arranged in a fine and close manner to form a honeycomb structure, coating liquid is brought into the grooves of the coating roller through a scraper cavity and then transferred to a film through the coating roller, the running direction of the coating roller needs to be set to be opposite to the advancing direction of the film in the coating process, and the purpose of transferring the coating liquid is achieved;
coating a rubber roller: the coating film can be lifted when not producing the coating film, so that the coating roller does not contact the casting sheet, and the casting sheet contacts the coating roller by pressing down the compression roller during production, thereby realizing coating; if a double-coated product is produced, the upper coating roll transfers the coating liquid to the surface of the rubber roll, from which it is transferred down to the cast sheet.
Measurement of substrate coating thickness: the coating thickness that can be measured on-line means the wet coating thickness, i.e., the thickness of the coating liquid before drying; coating thickness (coating liquid consumption/coating area) coating consumption/coating width (TDO speed × measurement time) at a fixed time × coating length.
The glue is acrylic glue, the preferable thickness is 2-50 μm, and the color of the glue can be changed by adding pigment inside the glue.
And coating the glue on the inner side surface of the base material after coating and forming.
The expansion coefficient of the base material is between 20 and 300 percent.
The battery cell can be fixed by the expansion of the adhesive tape in the presence of electrolyte, the existing adhesive tape can be replaced, the base material is formed by casting and coating films which are not acid-resistant and degradable, such as CPP, OPS, TPU, PLA, PO and the like, compared with other surface treatment modes, the coating does not need to be rewound off line, the coating is coated between longitudinal stretching and transverse stretching, a transverse stretching section is used as an oven drying coating liquid, and the production efficiency is high; and because the coating is uniform, the coating is thinner than off-line coating, the coating effect is better, the coating cost can be obviously reduced, the surface tension of the film subjected to corona treatment can be gradually attenuated along with the time, the problem of corona attenuation does not exist on the surface of the film subjected to coating treatment, the coating adaptability is strong by selecting acrylic acid glue through glue, the drying speed is high, the adhesive force to the base material is strong, the leveling property and the transparency are good, the base material is formed by casting and coating films which are not acid-resistant and degradable, such as CPP, OPS, TPU, PLA, PO and the like, the base material has high strength, large rigidity and stable shape, has the characteristics of good glossiness and transparency, stronger tearing resistance, good moisture resistance, excellent heat resistance and easy heat sealing, and the shrinkage rate and the shrinkage stress of the base material are large, but the heat sealing performance and the heat sealing strength are poor, the shrinkage temperature is high, and the range is narrow.
Example (b): the glue comprises a base material and glue, wherein the glue is arranged on the inner side surface of the base material; base material: CPP, OPS, TPU, PLA, PO and other films which are not acid-resistant and degradable are formed by tape casting and coating; the substrate thickness is preferably: 10-50 μm, and the expansion coefficient of the base material is 20-300%;
the coating process comprises the following steps: the coating solution is prepared into the coating solution for coating by stirring in a solution supply tank for a period of time, and the prepared coating solution is pumped into an intermediate charging bucket by a solution supply pump;
after the polyester film is longitudinally stretched by longitudinal stretching equipment, corona treatment is carried out on the surface of the film by corona equipment so as to improve the surface tension of the film and enhance the wetting performance, meanwhile, an intermediate pump pumps the coating liquid in an intermediate material tank into a closed scraper cavity, and a concave roller transfers the coating liquid in the cavity to the surface of the film through a contact wrap angle with the film so as to form a coating layer on the surface of the film; the film covered with the coating liquid enters transverse stretching equipment, and in a transverse stretching preheating section, the coating liquid volatilizes water in a drying process, and finally a uniform chemical treatment layer is formed on the surface of the film;
film coating equipment: the device comprises a coating liquid feeding device, a corona device, a kiss-coating guide roller, a coating scraper cavity, a coating concave roller, a coating rubber compression roller, an S-shaped guide roller and the like; the coating liquid is generally aqueous, and the basic components are water, a leveling agent (which makes the coating liquid uniformly dispersed), a functional coating liquid (which provides the main function of the coating liquid), a curing agent (also called a cross-linking agent, which is cross-linked with resin through a drying process to firmly bond the resin with the surface of the film) and a catalyst; coating liquid supply device: the prepared coating liquid is pumped into the intermediate tank from the liquid preparation tank and pumped into the scraper cavity from the intermediate tank; a corona treatment device: the coating device is positioned at the front end of the coating device and is used for performing corona treatment on the surface of the polyester film before coating to increase the surface tension of the film, so that the subsequent coating treatment is even in leveling and the coating liquid is firmly attached to the surface of the film; scraper cavity: the coating device comprises a cavity and a coating scraper, wherein the scraper cavity is tightly contacted with a coating concave roller in a working state, a coating liquid is transferred onto the coating concave roller, the coating scraper is used for removing redundant coating liquid on the coating roller to ensure that the coating liquid is uniformly distributed on the coating roller, and the replaceable coating scraper is usually made of stainless steel materials; coating roll: the coating system comprises a metal roller with fine grooves on the surface, wherein each groove is arranged in a fine and close manner to form a honeycomb structure, coating liquid is brought into the grooves of the coating roller through a scraper cavity and then transferred to a film through the coating roller, the running direction of the coating roller needs to be set to be opposite to the advancing direction of the film in the coating process, and the purpose of transferring the coating liquid is achieved; coating a rubber roller: the coating film can be lifted when not producing the coating film, so that the coating roller does not contact the casting sheet, and the casting sheet contacts the coating roller by pressing down the compression roller during production, thereby realizing coating; if a double-sided coated product is produced, the upper coating roller transfers the coating liquid to the surface of the rubber roller, and then the coating liquid is transferred downwards to the cast sheet from the rubber roller; measurement of substrate coating thickness: the coating thickness that can be measured on-line means the wet coating thickness, i.e., the thickness of the coating liquid before drying; coating thickness (coating liquid consumption/coating area) coating consumption/coating width (TDO speed × measurement time) at a fixed time; coating glue on the inner side surface of the base material after coating and forming to prepare an expansion adhesive tape, wherein the glue is acrylic glue, and the thickness is preferably 2-50 mu m;
the color of the glue can be changed by adding the pigment in the glue, so that the adhesive tape has a good fool-proof use effect, the cell can be fixed by the expansion of the adhesive tape in the presence of electrolyte, the existing termination adhesive tape is replaced, the base material is formed by casting and coating CPP, OPS, TPU, PLA, PO and other films which are not acid-resistant and degradable, compared with other surface treatment modes, the coating does not need offline rewinding, the coating is coated between longitudinal stretching and transverse stretching, and a transverse stretching section is used as an oven to dry the coating liquid, so that the production efficiency is high; and because the coating is uniform, the coating is thinner than off-line coating, the coating effect is better, the coating cost can be obviously reduced, the surface tension of the film subjected to corona treatment can be gradually attenuated along with the time, the problem of corona attenuation does not exist on the surface of the film subjected to coating treatment, the coating adaptability is strong by selecting acrylic acid glue through glue, the drying speed is high, the adhesive force to the base material is strong, the leveling property and the transparency are good, the base material is formed by casting and coating films which are not acid-resistant and degradable, such as CPP, OPS, TPU, PLA, PO and the like, the base material has high strength, large rigidity and stable shape, has the characteristics of good glossiness and transparency, stronger tearing resistance, good moisture resistance, excellent heat resistance and easy heat sealing, and the shrinkage rate and the shrinkage stress of the base material are large, but the heat sealing performance and the heat sealing strength are poor, the shrinkage temperature is high, and the range is narrow.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides an expansion adhesive tape for lithium cell electricity core, includes substrate and glue, its characterized in that: glue is arranged on the inner side surface of the base material.
2. The expansion adhesive tape for lithium battery cells according to claim 1, wherein: the base material is as follows: CPP, OPS, TPU, PLA, PO and other films which are not acid-resistant and degradable are formed by tape casting and coating; the substrate thickness is preferably: 10 to 50 μm.
3. The expansion adhesive tape for lithium battery cells as claimed in claim 2, wherein: the coating process comprises the following steps: the coating solution is prepared into the coating solution for coating by stirring in a solution supply tank for a period of time, and the prepared coating solution is pumped into an intermediate charging bucket by a solution supply pump;
after the polyester film is longitudinally stretched by longitudinal stretching equipment, corona treatment is carried out on the surface of the film by corona equipment so as to improve the surface tension of the film and enhance the wetting performance, meanwhile, an intermediate pump pumps the coating liquid in an intermediate material tank into a closed scraper cavity, and a concave roller transfers the coating liquid in the cavity to the surface of the film through a contact wrap angle with the film so as to form a coating layer on the surface of the film; and (3) the film coated with the coating liquid enters transverse stretching equipment, and in a transverse stretching preheating section, the coating liquid volatilizes water in a drying process, and finally a uniform chemical treatment layer is formed on the surface of the film.
4. The expansion adhesive tape for lithium battery cells as claimed in claim 2, wherein: the film coating equipment comprises: the device comprises a coating liquid feeding device, a corona device, a kiss-coating guide roller, a coating scraper cavity, a coating concave roller, a coating rubber compression roller, an S-shaped guide roller and the like; the coating liquid is generally aqueous, and the basic components are water, a leveling agent (to uniformly disperse the coating liquid), a functional coating liquid (to provide the main function of the coating liquid), a curing agent (also called a cross-linking agent, which is cross-linked with the resin through a drying process to firmly bond the resin with the surface of the film), and a catalyst.
5. The expansion adhesive tape for lithium battery cells as claimed in claim 4, wherein: the coating liquid supply device comprises: the prepared coating liquid is pumped into the intermediate tank from the liquid preparation tank and pumped into the scraper cavity from the intermediate tank;
the corona treatment device comprises: the coating device is positioned at the front end of the coating device and is used for performing corona treatment on the surface of the polyester film before coating to increase the surface tension of the film, so that the subsequent coating treatment is even in leveling and the coating liquid is firmly attached to the surface of the film;
the scraper cavity is characterized in that: the coating device comprises a cavity and a coating scraper, wherein the scraper cavity is tightly contacted with a coating concave roller in a working state, a coating liquid is transferred onto the coating concave roller, the coating scraper is used for removing redundant coating liquid on the coating roller to ensure that the coating liquid is uniformly distributed on the coating roller, and the replaceable coating scraper is usually made of stainless steel materials;
the coating roller comprises: the coating system comprises a metal roller with fine grooves on the surface, wherein each groove is arranged in a fine and close manner to form a honeycomb structure, coating liquid is brought into the grooves of the coating roller through a scraper cavity and then transferred to a film through the coating roller, the running direction of the coating roller needs to be set to be opposite to the advancing direction of the film in the coating process, and the purpose of transferring the coating liquid is achieved;
the coating rubber roller: the coating film can be lifted when not producing the coating film, so that the coating roller does not contact the casting sheet, and the casting sheet contacts the coating roller by pressing down the compression roller during production, thereby realizing coating; if a double-coated product is produced, the upper coating roll transfers the coating liquid to the surface of the rubber roll, from which it is transferred down to the cast sheet.
6. The expansion adhesive tape for lithium battery cells according to claim 1, wherein: measurement of the coating thickness of the substrate: the coating thickness that can be measured on-line means the wet coating thickness, i.e., the thickness of the coating liquid before drying; coating thickness (coating liquid consumption/coating area) coating consumption/coating width (TDO speed × measurement time) at a fixed time × coating length.
7. The expansion adhesive tape for lithium battery cells according to claim 1, wherein: the glue is acrylic glue, the thickness is preferably 2-50 μm, and the color of the glue can be changed by adding a pigment inside the glue.
8. The expansion adhesive tape for lithium battery cells according to claim 1, wherein: and the glue is coated on the inner side surface of the base material after coating and forming.
9. The expansion adhesive tape for lithium battery cells according to claim 1, wherein: the expansion coefficient of the base material is between 20% and 300%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111475411.2A CN114181634A (en) | 2021-12-06 | 2021-12-06 | Expansion adhesive tape for lithium battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111475411.2A CN114181634A (en) | 2021-12-06 | 2021-12-06 | Expansion adhesive tape for lithium battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114181634A true CN114181634A (en) | 2022-03-15 |
Family
ID=80603423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111475411.2A Pending CN114181634A (en) | 2021-12-06 | 2021-12-06 | Expansion adhesive tape for lithium battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114181634A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011267A (en) * | 2022-06-20 | 2022-09-06 | 芜湖徽氏新材料科技有限公司 | Lithium ion battery thickness swelling adhesive tape and production method thereof |
| CN115260934A (en) * | 2022-08-29 | 2022-11-01 | 东莞市玛仕金科技有限公司 | Preparation method of degradable gold stamping account adhesive tape |
| CN117563916A (en) * | 2024-01-15 | 2024-02-20 | 常州钟恒新材料股份有限公司 | High-performance optical polyester film on-line coating method and coating device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5755883A (en) * | 1990-10-05 | 1998-05-26 | Dainippon Screen Mfg. Co., Ltd. | Roll coating device for forming a thin film of uniform thickness |
| JP2012130896A (en) * | 2010-12-24 | 2012-07-12 | Nakamoto Pakkusu Kk | Coating apparatus |
| CN210022677U (en) * | 2019-03-28 | 2020-02-07 | 佛山霄绫包装材料有限公司 | Film coating production line |
| CN112175542A (en) * | 2020-10-15 | 2021-01-05 | 天津市中运国际工贸有限公司 | Low-temperature hot melt adhesive expansion adhesive tape and preparation method thereof |
| CN112356590A (en) * | 2020-11-09 | 2021-02-12 | 山东胜通光学材料科技有限公司 | Production method of special enhanced printing base film for electronic tag |
| CN113561517A (en) * | 2021-08-09 | 2021-10-29 | 山东胜通光学材料科技有限公司 | High-definition thin brightening type polyester base film manufacturing process and equipment |
-
2021
- 2021-12-06 CN CN202111475411.2A patent/CN114181634A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5755883A (en) * | 1990-10-05 | 1998-05-26 | Dainippon Screen Mfg. Co., Ltd. | Roll coating device for forming a thin film of uniform thickness |
| JP2012130896A (en) * | 2010-12-24 | 2012-07-12 | Nakamoto Pakkusu Kk | Coating apparatus |
| CN210022677U (en) * | 2019-03-28 | 2020-02-07 | 佛山霄绫包装材料有限公司 | Film coating production line |
| CN112175542A (en) * | 2020-10-15 | 2021-01-05 | 天津市中运国际工贸有限公司 | Low-temperature hot melt adhesive expansion adhesive tape and preparation method thereof |
| CN112356590A (en) * | 2020-11-09 | 2021-02-12 | 山东胜通光学材料科技有限公司 | Production method of special enhanced printing base film for electronic tag |
| CN113561517A (en) * | 2021-08-09 | 2021-10-29 | 山东胜通光学材料科技有限公司 | High-definition thin brightening type polyester base film manufacturing process and equipment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011267A (en) * | 2022-06-20 | 2022-09-06 | 芜湖徽氏新材料科技有限公司 | Lithium ion battery thickness swelling adhesive tape and production method thereof |
| CN115260934A (en) * | 2022-08-29 | 2022-11-01 | 东莞市玛仕金科技有限公司 | Preparation method of degradable gold stamping account adhesive tape |
| CN115260934B (en) * | 2022-08-29 | 2023-09-08 | 东莞市玛仕金科技有限公司 | Preparation method of degradable gold stamping hand account adhesive tape |
| CN117563916A (en) * | 2024-01-15 | 2024-02-20 | 常州钟恒新材料股份有限公司 | High-performance optical polyester film on-line coating method and coating device |
| CN117563916B (en) * | 2024-01-15 | 2024-03-29 | 常州钟恒新材料股份有限公司 | High-performance optical polyester film on-line coating method and coating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114181634A (en) | Expansion adhesive tape for lithium battery cell | |
| CN103732390B (en) | Microscopic roughness structure with protective film and fabrication method therefor | |
| CN102602081B (en) | The plastic-aluminum packaging film of the anti-burn through short circuit of the corrosion-resistant puncture-resistant of lithium battery apparatus and manufacture method thereof | |
| KR102112194B1 (en) | Apparatus of manufacturing a sheet for a secondary battery cell pouch | |
| US20200239744A1 (en) | Optical clear adhesive and manufacturing method thereof | |
| CN110379948B (en) | Dry preparation process of lithium battery flexible packaging film | |
| EP0543293B1 (en) | Coated article and method for producing same | |
| AU2002225175A1 (en) | Electrode with conductive particles for a battery | |
| US20160365555A1 (en) | Separator washing method, separator producing method, and film washing method | |
| CA2607418A1 (en) | Electrode and manufacturing methods | |
| CN109705755A (en) | A kind of PU protective film and its production coating process | |
| CN106486630A (en) | Double-deck slider and its manufacture method | |
| CN208189713U (en) | A kind of making apparatus of fuel cell membrane electrode | |
| CN105895922A (en) | Fabrication method of conductive coating aluminum foil | |
| CN100373226C (en) | Transparent adhesive film for protecting liquid crystal polarization plate | |
| CN101950686B (en) | Three-dimensional structure microelectrode applied to mini-super capacitor and manufacturing method thereof | |
| CN210193734U (en) | Substrate-free hot-melt double-sided adhesive tape | |
| CN115353819B (en) | Pressure-sensitive adhesive tape for rubber type lithium battery | |
| EP3748043A1 (en) | Electrolytic copper foil having excellent handling characteristics in post-processing, and manufacturing method therefor | |
| CN218005046U (en) | Black aluminum-plastic film for lithium battery | |
| JP6296301B2 (en) | Electrolyte membrane structure | |
| CN110962411A (en) | Metal lithium belt capable of being coated and processed by coating machine and preparation method thereof | |
| CN111016315A (en) | Packaging material for battery, preparation method and application thereof | |
| CN213652353U (en) | Composite termination adhesive tape for cylindrical battery and cylindrical battery using same | |
| CN217806348U (en) | POF heat shrinkable film with high cold resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220315 |
|
| RJ01 | Rejection of invention patent application after publication |