CN112063316A - Compound PET sticky tape of lithium ion battery - Google Patents

Compound PET sticky tape of lithium ion battery Download PDF

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Publication number
CN112063316A
CN112063316A CN201910503309.5A CN201910503309A CN112063316A CN 112063316 A CN112063316 A CN 112063316A CN 201910503309 A CN201910503309 A CN 201910503309A CN 112063316 A CN112063316 A CN 112063316A
Authority
CN
China
Prior art keywords
lithium ion
ion battery
adhesive tape
layer
pet
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
Application number
CN201910503309.5A
Other languages
Chinese (zh)
Inventor
赵翊鸣
宋有志
张志剑
饶绍建
刘涛
宋明
李凡群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wanxiang A123 Systems Asia Co Ltd
Original Assignee
Wanxiang Group Corp
Wanxiang A123 Systems Asia Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wanxiang Group Corp, Wanxiang A123 Systems Asia Co Ltd filed Critical Wanxiang Group Corp
Priority to CN201910503309.5A priority Critical patent/CN112063316A/en
Publication of CN112063316A publication Critical patent/CN112063316A/en
Pending legal-status Critical Current

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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
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer
    • 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
    • C09J2467/006—Presence of polyester 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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

Landscapes

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

Abstract

The invention relates to the technical field of lithium ion batteries, and provides a composite PET adhesive tape for a lithium ion battery, which comprises a base material layer, and bonding layers and thermoplastic layers coated on two sides of the base material layer, wherein the bonding layers and the thermoplastic layers are used for solving the problems that the traditional PET adhesive tape for the lithium ion battery has a loose packaging structure, the sticking position hinders the direct and effective infiltration of electrolyte, the adhesive tape still needs to be removed when a battery cell is disassembled, and the resource waste is caused by discarding. The invention not only retains the advantages and characteristics of the original PET adhesive tape, but also has the characteristic of heat sealing, reduces the residual space in the battery cell and has a more compact structure; the vacuum liquid injection effect, the electrolyte infiltration effect and the evacuation effect of the battery core are promoted; the cycle performance of the battery cell is improved, and therefore the performance of the lithium ion battery is improved.

Description

Compound PET sticky tape of lithium ion battery
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery composite PET adhesive tape.
Background
The lithium ion battery is a green energy source, attracts much attention with the unique advantages of high specific energy, high working voltage, wide application temperature range, low self-discharge rate, long cycle life, no pollution and the like, has the characteristics of the current battery industry development, and has great market opportunity in the development of telecommunication and information markets, particularly the mass use of mobile phones and notebook computers.
At present, in the assembly and manufacturing process of lithium ion batteries, the adhesive tape used by the soft package battery is basically a PET adhesive tape, and the main application process is a lamination section and a welding section. The purpose of using the PET adhesive tape in the lamination section is to bond and fix the diaphragm and the naked electric core body, and the use occasion is when the lamination finishes the coating of the diaphragm; the purpose of using the PET adhesive tape at the welding section is to prevent the welding area from causing physical damage to the aluminum plastic film.
The defects of the prior art mainly include the following two points:
(1) when using former PET sticky tape to paste naked electric core, inner structure is comparatively loose. Usually, the lamination is finished, and a PET adhesive tape is pasted on the outermost surface of the membrane wrapped so as to fix the whole structure of the naked battery cell. Although the adhesive tapes at the two ends of the bare cell and the surface fixing membrane adhesive tape can effectively fix the whole structure of the bare cell, the internal structure of the bare cell is still loose, so that the subsequent vacuum liquid injection and formation processes are not facilitated, and the sticking position of the adhesive tape hinders the direct and effective infiltration of electrolyte;
(2) inconvenient operation and ineffective waste are caused when the battery core is disassembled. The demand can be disassembled along with a large amount of electric cores in the electric core project development stage, and the sticky tape on naked electric core surface still needs to be detached when disassembling the electric core, and the operation is inconvenient, especially when operating in the glove box. In addition, the adhesive tapes are directly discarded after being disassembled, so that the cost is wasted inefficiently.
The Chinese patent literature discloses 'a special adhesive tape for a lithium ion battery and application thereof', and the application publication number of the special adhesive tape is CN 109554136A, the special adhesive tape for the lithium ion battery comprises a protective layer, a base material layer and a bonding layer, wherein the protective layer is a polyamide film, the base material layer is composed of an upper layer and a lower layer, the upper layer is a PET (polyethylene terephthalate) polyester film, and the lower layer is a polypropylene film. However, the special adhesive tape for the lithium ion battery has a complex structure, occupies residual space inside the battery cell, and has a looser structure and high production cost.
Disclosure of Invention
The invention provides a composite PET adhesive tape for a lithium ion battery, which aims to solve the problems that the traditional PET adhesive tape for the lithium ion battery has a loose packaging structure, the sticking position of the traditional PET adhesive tape prevents the direct and effective infiltration of electrolyte, and the adhesive tape still needs to be removed and discarded when a battery cell is disassembled, so that the resource waste is caused.
In order to achieve the purpose, the invention adopts the following technical scheme:
the composite PET adhesive tape for the lithium ion battery comprises a base material layer, and a bonding layer and a thermoplastic layer which are coated on two sides of the base material layer.
PET: the chemical name of PET is polyethylene terephthalate with the chemical formula of [ COC6H4COOCH2CH2O]n is the same as the formula (I). Belongs to a crystalline saturated polyester, is a milky white or light yellow highly crystalline polymer, has smooth and glossy surface and is rawOr a resin commonly used in the art.
PET tape: the adhesive tape is made of PET double-sided coating acrylic resin adhesive, the color of the adhesive tape is generally transparent and black, and the rare adhesive tape also comprises a green PET double-sided adhesive tape. The adhesive has good dimensional stability, thermal stability and chemical stability, good initial adhesion and adhesive holding capacity, is easy to die-cut and process, and has good adhesion to plastic cement, rubber and nameplates; can be applied to wider temperature range and severe environment.
The lithium ion battery composite PET adhesive tape comprises the following components: the composite adhesive tape is a composite adhesive tape which is coated with a thermoplastic layer on the other side on the basis of the original PET adhesive tape. Not only retains the advantages and characteristics of the original PET adhesive tape, but also has the characteristic of heat sealing. Under the condition of normal temperature, the PET layer has viscosity; under heating, the thermoplastic layer melts and the coating melts to produce a viscous coating. The internal structure of the naked electric core can be effectively and tightly attached after being baked, which is beneficial to the subsequent vacuum liquid injection and formation process; and the original PET adhesive tape is not needed to be used any more, so that the direct and effective infiltration of the electrolyte is facilitated, and the performance of the lithium ion battery is improved.
Preferably, the substrate layer is PET polyester; the bonding layer is acrylic adhesive. The PET adhesive tape used in the technical field of lithium ion batteries basically comprises a PET polyester substrate layer, and acrylic adhesive is coated on one surface of the PET polyester substrate layer.
Preferably, the thermoplastic layer is at least one selected from the group consisting of polypropylene (PP), ethylene-vinyl acetate copolymer (EVA resin), polyurethane, and modified materials mainly composed of the above materials. The material can generate viscosity under the heating condition, and has mechanical stability, corrosion resistance, nontoxicity and environmental friendliness.
Preferably, the bonding layer and the thermoplastic layer are applied by a method selected from the group consisting of roll coating, physical vapor deposition, chemical vapor deposition, low pressure plasma spraying, low pressure arc spraying, laser spraying, and magnetron sputtering.
Preferably, the width of the lithium ion battery composite PET adhesive tape is 5.7-6.3 mm, and the thickness of the lithium ion battery composite PET adhesive tape is 0.06-0.1 mm. The width and the thickness of the composite PET adhesive tape of the lithium ion battery are limited, and the PET adhesive tape is used for both the lamination section and the welding section in the assembly and manufacturing process of the actual lithium ion battery; the adhesive tape cannot effectively prevent the whole welding area from causing physical damage to the aluminum-plastic film due to the fact that the width is too narrow; too wide width can lead to reduced space for effective infiltration of electrolyte during assembly and injection; the thickness is too thin, so that the overall mechanical stability of the adhesive tape is reduced, and the risk of puncture is caused; the thickness is too thick, can lead to appearing the risk that the whole thickness of electricity core exceeds standard.
Preferably, the thickness of the base material layer is 0.02-0.03 mm, and the base material layer is too thin, so that the overall mechanical stability of the adhesive tape is reduced, and the risk of puncturing is caused; the thickness of the PET layer is too thick, so that the risk that the overall thickness of the battery cell exceeds the standard can be caused.
Preferably, the peel strength of the base material layer is not less than 0.35kgf/in, and the peel strength of the base material layer is too low, which may cause peeling of the PET layer during heating or external mechanical impact.
Preferably, the thickness of the thermoplastic layer is 0.02-0.04 mm. The thickness of the thermoplastic layer is too thin, so that the viscosity generated after the thermoplastic layer is heated and melted is not enough; the thickness of the thermoplastic layer is too thick, which can cause the risk of the excessive thickness of the whole battery core.
Preferably, the thermoplastic layer has a peel strength of 0.85kgf/in or greater. The peel strength of the thermoplastic layer is too low, which may result in the thermoplastic layer falling off during heating or external mechanical impact.
Therefore, the invention has the following beneficial effects:
(1) the advantages and the characteristics of the original PET adhesive tape are maintained, the PET adhesive tape has the characteristic of heat sealing, the residual space in the battery cell is reduced, and the structure is more compact; the vacuum liquid injection effect, the electrolyte infiltration effect and the evacuation effect of the battery core are promoted; the cycle performance of the battery cell is improved, so that the performance of the lithium ion battery is improved;
(2) the step of removing the adhesive tape is not needed any more when the battery core is disassembled, so that the operation is more convenient and safer, the environmental protection is also facilitated, and no pollution and waste are generated.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples.
In the present invention, all the equipment and materials are commercially available or commonly used in the art, and the methods in the following examples are conventional in the art unless otherwise specified.
Example 1
A lithium ion battery composite PET adhesive tape comprises a PET polyester substrate layer, and an acrylic adhesive bonding layer and a polypropylene (PP) thermoplastic layer which are coated on two sides of the PET polyester substrate layer; the coating layer is coated by a slit coater in a roll coating manner, the speed of the slit coater is set to be 350m/min, the curing temperature is 200 ℃, one side of the coating layer is made of an acrylic adhesive material, the other side of the coating layer is made of a polypropylene (PP) material, the width of the composite PET adhesive tape is 6.0 mm, the thickness of the composite PET adhesive tape is 0.09 mm, the thickness of the PET polyester base material layer is 0.02 mm, and the peeling strength is 0.5 kgf/in; the thickness of the PP layer was 0.03mm, and the peel strength was 1.0 kgf/in.
The lithium ion battery composite PET adhesive tape is applied as a soft package NCM 111/graphite lithium ion battery adhesive tape with the rated capacity of 26Ah, the battery core after the electrolyte is injected is placed for 4 h and then is disassembled, and the surface of the battery core is found to be completely infiltrated, the internal infiltration effect is good, and the electrolyte is abundant. The charge-discharge cycle test was carried out at a temperature of 45 ℃ and a current density of 1C/2C, and the capacity retention rate after 600 cycles was 92.6%.
Example 2
A lithium ion battery composite PET adhesive tape comprises a PET polyester substrate layer, and an acrylic adhesive bonding layer and a thermoplastic layer which are coated on two sides of the PET polyester substrate layer; the coating layer is coated by a slit coater in a roll coating way, the speed of the slit coater is set to be 350m/min, the curing temperature is 200 ℃, one side of the coating layer is made of an acrylic adhesive material, the other side of the coating layer is made of ethylene-vinyl acetate copolymer (EVA resin), the width of the composite PET adhesive tape is 5.7 mm, the thickness of the composite PET adhesive tape is 0.08 mm, the thickness of the PET polyester substrate layer is 0.03mm, and the peeling strength is 0.6 kgf/in; the EVA resin layer had a thickness of 0.03mm and a peel strength of 0.85 kgf/in.
The lithium ion battery composite PET adhesive tape is applied as a soft package NCM 111/graphite lithium ion battery adhesive tape with the rated capacity of 26Ah, the battery core after the electrolyte is injected is placed for 4 h and then is disassembled, and the surface of the battery core is found to be completely infiltrated, the internal infiltration effect is good, and the electrolyte is abundant. The charge-discharge cycle test was carried out at a temperature of 45 ℃ and a current density of 1C/2C, and the capacity retention rate after 600 cycles was 92.5%.
Example 3
A lithium ion battery composite PET adhesive tape comprises a PET polyester substrate layer, and bonding layers and thermoplastic layers coated on two sides of the PET polyester substrate layer; coating by a roller coating of a slit coater, setting the running speed to be 350m/min, setting the curing temperature to be 200 ℃, setting one side of the composite PET adhesive tape to be an acrylic adhesive material and the other side of the composite PET adhesive tape to be an organic silicon surfactant modified EVA resin material, setting the width of the composite PET adhesive tape to be 6.3mm and the thickness of the composite PET adhesive tape to be 0.1mm, wherein the thickness of the PET polyester substrate layer is 0.03mm, and the peeling strength is 0.6 kgf/in; the silicone surfactant-modified EVA resin layer had a thickness of 0.03mm and a peel strength of 1.0 kgf/in.
The lithium ion battery composite PET adhesive tape is applied as a soft package NCM 111/graphite lithium ion battery adhesive tape with the rated capacity of 26Ah, the battery core after the electrolyte is injected is placed for 4 h and then is disassembled, and the surface of the battery core is found to be completely infiltrated, the internal infiltration effect is good, and the electrolyte is abundant. The charge-discharge cycle test was carried out at a temperature of 45 ℃ and a current density of 1C/2C, and the capacity retention rate after 600 cycles was 93.0%.
Comparative example 1
Selecting a commercial PET single-layer adhesive tape, designing and preparing a soft package NCM 111/graphite lithium ion battery according to the rated capacity of 26Ah, laying aside the battery cell after the electrolyte is injected for 8 h, and then disassembling the battery cell, and finding that the surface of the battery cell is completely infiltrated, but the internal infiltration effect is poor, particularly in the middle part. The charge-discharge cycle test was carried out at a temperature of 45 ℃ and a current density of 1C/2C, and the capacity retention rate after 589 weeks of cycle was 88.3%.
Comparative example 2
A lithium ion battery composite PET adhesive tape comprises a PET polyester substrate layer, and bonding layers and thermoplastic layers coated on two sides of the PET polyester substrate layer; coating by a roller coating of a slit coater, setting the running speed to be 350m/min, the curing temperature to be 200 ℃, wherein one side of the composite PET adhesive tape is an acrylic adhesive material, the other side of the composite PET adhesive tape is a polypropylene (PP) material, the width of the composite PET adhesive tape is 6.0 mm, the thickness of the composite PET adhesive tape is 0.3 mm, the thickness of the PET polyester base material layer is 0.2 mm, and the peeling strength is 3.5 kgf/in; the thickness of the PP layer was 0.1mm, and the peel strength was 2.2 kgf/in.
The composite PET adhesive tape for the lithium ion battery is applied as a soft package NCM 111/graphite lithium ion battery adhesive tape with the rated capacity of 26Ah, the thickness of a battery cell after electrolyte injection exceeds the standard, the battery cell is disassembled after being placed for 4 h, the surface of the battery cell is found to be completely infiltrated, the infiltration effect of the interior of the battery cell is good, and the electrolyte is abundant. The thickness exceeds the standard, so that the final finished product battery cell exceeds the standard and becomes a defective battery cell, and a charge-discharge cycle test is not carried out.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims (9)

1. The composite PET adhesive tape for the lithium ion battery is characterized by comprising a base material layer, and a bonding layer and a thermoplastic layer which are coated on two sides of the base material layer.
2. The composite PET tape for the lithium ion battery of claim 1, wherein the substrate layer is PET polyester.
3. The composite PET tape for lithium ion batteries according to claim 1, wherein the thermoplastic layer is at least one selected from polypropylene, ethylene-vinyl acetate copolymer, polyurethane and modified materials mainly composed of the above materials.
4. The lithium ion battery composite PET tape according to claim 1, wherein the thermoplastic layer is coated by one method selected from roll coating, physical vapor deposition, chemical vapor deposition, low-pressure plasma spraying, low-pressure arc spraying, laser spraying and magnetron sputtering.
5. The lithium ion battery composite PET tape according to claim 1, wherein the lithium ion battery composite PET tape has a width of 5.7-6.3 mm and a thickness of 0.06-0.1 mm.
6. The composite PET tape for the lithium ion battery as claimed in claim 1, wherein the thickness of the substrate layer is 0.02-0.03 mm.
7. The composite PET tape for the lithium ion battery as claimed in claim 1, wherein the peel strength of the substrate layer is not less than 0.35 kgf/in.
8. The composite PET tape for the lithium ion battery as claimed in claim 1, wherein the thickness of the thermoplastic layer is 0.02-0.04 mm.
9. The composite PET tape for the lithium ion battery of claim 1, wherein the peel strength of the thermoplastic layer is not less than 0.85 kgf/in.
CN201910503309.5A 2019-06-11 2019-06-11 Compound PET sticky tape of lithium ion battery Pending CN112063316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910503309.5A CN112063316A (en) 2019-06-11 2019-06-11 Compound PET sticky tape of lithium ion battery

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Application Number Priority Date Filing Date Title
CN201910503309.5A CN112063316A (en) 2019-06-11 2019-06-11 Compound PET sticky tape of lithium ion battery

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113471547A (en) * 2021-05-18 2021-10-01 惠州锂威新能源科技有限公司 Preparation method of battery and battery
CN114267885A (en) * 2021-12-21 2022-04-01 惠州亿纬锂能股份有限公司 Anti-drop steel shell button battery and preparation method and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104610883A (en) * 2014-12-30 2015-05-13 东莞市澳中电子材料有限公司 Double sticky tape for lithium battery and preparation method for double sticky tape
CN105390627A (en) * 2015-10-16 2016-03-09 广东烛光新能源科技有限公司 Electrochemical cell and preparation method thereof
CN106797055A (en) * 2014-11-18 2017-05-31 日本瑞翁株式会社 Electrode constitutes body fixation two-sided tape and secondary cell
CN208869541U (en) * 2018-08-15 2019-05-17 苏州瑞得塑胶制品有限公司 The water proof type adhesive tape of improvement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106797055A (en) * 2014-11-18 2017-05-31 日本瑞翁株式会社 Electrode constitutes body fixation two-sided tape and secondary cell
CN104610883A (en) * 2014-12-30 2015-05-13 东莞市澳中电子材料有限公司 Double sticky tape for lithium battery and preparation method for double sticky tape
CN105390627A (en) * 2015-10-16 2016-03-09 广东烛光新能源科技有限公司 Electrochemical cell and preparation method thereof
CN208869541U (en) * 2018-08-15 2019-05-17 苏州瑞得塑胶制品有限公司 The water proof type adhesive tape of improvement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113471547A (en) * 2021-05-18 2021-10-01 惠州锂威新能源科技有限公司 Preparation method of battery and battery
CN114267885A (en) * 2021-12-21 2022-04-01 惠州亿纬锂能股份有限公司 Anti-drop steel shell button battery and preparation method and application thereof

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