CN114854319A - Swelling adhesive tape based on lithium battery gaps and swelling method thereof - Google Patents

Swelling adhesive tape based on lithium battery gaps and swelling method thereof Download PDF

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Publication number
CN114854319A
CN114854319A CN202210570672.0A CN202210570672A CN114854319A CN 114854319 A CN114854319 A CN 114854319A CN 202210570672 A CN202210570672 A CN 202210570672A CN 114854319 A CN114854319 A CN 114854319A
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China
Prior art keywords
swelling
adhesive tape
expansion
tape body
lithium battery
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CN202210570672.0A
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Chinese (zh)
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袁雅阁
曹延娜
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Shenzhen Runsea Electronic Co ltd
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Shenzhen Runsea Electronic Co ltd
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Priority to CN202210570672.0A priority Critical patent/CN114854319A/en
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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
    • C09J7/24—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
    • 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]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/197—Sealing members characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
    • 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
    • C09J2301/30—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
    • C09J2423/00—Presence of polyolefin
    • C09J2423/04—Presence of homo or copolymers of ethene
    • C09J2423/046—Presence of homo or copolymers of ethene 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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a swelling adhesive tape based on lithium battery gaps and a swelling method thereof, belonging to the technical field of swelling adhesive tapes, the scheme is that a three-dimensional bird nest type swelling fiber frame in a high-strength swelling mechanism is matched with a protective layer to support the swelling adhesive tape body with certain strength when the swelling adhesive tape body expands in electrolyte, so that the swelling adhesive tape body is not easy to shrink, the bonding effect is enhanced, an air swelling temperature reduction mechanism is decomposed by means of heat absorption of ammonium chloride powder, the temperature of the swelling adhesive tape body is reduced, the high-temperature influence is reduced, the high-expansion multiplying power is kept at high temperature without shrinkage, decomposed hydrogen chloride gas and ammonia gas overflow, an elastic swelling air bag is pushed to expand outwards, the phase change of buffer fluid in a buffer vibration dissipation mechanism is matched, the impact is absorbed, a protective layer is formed, the impact is not easy to be transmitted to the swelling fiber frame, and the high-strength swelling support of the swelling adhesive tape body is ensured, reduce the temperature and the impact influence of vibration, and prolong the service life of the device.

Description

Swelling adhesive tape based on lithium battery gaps and swelling method thereof
Technical Field
The invention relates to the technical field of swelling adhesive tapes, in particular to a swelling adhesive tape based on a lithium battery gap and a swelling method thereof.
Background
Along with the rapid development of new forms of energy application, the application of lithium cell is more and more extensive, exists certain clearance between the naked electric core of lithium cell and the shell body, and it can be frequent the emergence shake and vibrations in the use, very easily causes naked electric core and casing to take place the skew, leads to inside device to damage to the performance of lithium cell has been influenced, very big potential safety hazard has also been caused, consequently, need bond naked electric core and casing and fill the clearance between them through the swelling sticky tape.
The swelling adhesive tape in the prior art is influenced by temperature and use in the long-time use process, so that the swelling effect is poor, the gap of the lithium battery cannot be effectively filled, and the use performance and safety of the lithium battery are reduced.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a swelling adhesive tape based on a lithium battery gap and a swelling method thereof, the scheme is that a three-dimensional bird nest type swelling fiber frame in a high-strength swelling mechanism is matched with a protective layer to support the swelling adhesive tape body with certain strength when the swelling adhesive tape body is swelled in electrolyte, so that the swelling adhesive tape body is not easy to shrink and the bonding effect is enhanced, and an air swelling cooling mechanism is used for reducing the temperature of the swelling adhesive tape body by means of the heat absorption and decomposition of ammonium chloride powder, reducing the influence of high temperature, so that the swelling adhesive tape body keeps high expansion multiplying power at high temperature without shrinking, and hydrogen chloride gas and ammonia gas which are decomposed overflow to push an elastic swelling air bag to expand outwards, and the shock impact is absorbed by matching with the phase change of buffer fluid in a buffer vibration dissipation mechanism, so that the impact is consumed to form a protective layer, so that the impact influence is not easy to be transferred to the swelling fiber frame, the high-strength expansion support of the swelling adhesive tape body is ensured, the temperature and vibration impact influence is reduced, and the service life of the swelling adhesive tape body is prolonged.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A swelling adhesive tape based on a lithium battery gap and a swelling method thereof comprise a swelling adhesive tape body, wherein the swelling adhesive tape body comprises a base layer and an adhesive layer, a high-strength expansion mechanism and an inflatable cooling mechanism are respectively arranged in the base layer, and a buffering vibration-consuming mechanism is arranged on the high-strength expansion mechanism, so that the swelling adhesive tape body is supported at a certain strength when expanded in electrolyte by matching a three-dimensional bird nest type expansion fiber frame in the high-strength expansion mechanism with a protective layer, the swelling adhesive tape body is not easy to shrink, the bonding effect is enhanced, the temperature of the swelling adhesive tape body is reduced by the inflatable cooling mechanism through heat absorption and decomposition of ammonium chloride powder, the high-temperature influence is reduced, the swelling adhesive tape body keeps a high expansion rate at a high temperature without shrinkage, and decomposed hydrogen chloride gas and ammonia gas overflow to push an elastic expansion air bag to expand outwards to match with phase change of a buffering fluid in the buffering vibration-consuming mechanism, the impact of shock is absorbed, the impact force is consumed, a protective layer is formed, the impact influence is not easily transmitted to the expansion fiber frame, the high-strength expansion support of the swelling adhesive tape body is guaranteed, the impact influence of temperature and shock is reduced, and the service life of the adhesive tape is prolonged.
Furthermore, the basic unit adopts polyethylene diaphragm material to make, the glue film adopts polyacrylate pressure sensitive adhesive material to make, and the basic unit of making through using polyethylene diaphragm material has good stretching resistance, collapse resistance and wearability, and the glue film of using polyacrylate pressure sensitive adhesive material to make has better low temperature resistant, high temperature resistant, but the volatile matter that congeals and the mass loss rate is low to the characteristic of no harmful gas escape, safety ring protects.
Furthermore, the high-strength expansion mechanism comprises a plurality of expansion fiber frames arranged in the base layer, three cooling lantern rings are arranged on the expansion fiber frames, the diameters of the three cooling lantern rings are sequentially increased from inside to outside, a protective layer is arranged at the outer end of each expansion fiber frame, the swelling adhesive tape body expands under the soaking of electrolyte, the thickness of the swelling adhesive tape body is increased by multiple times, so that gaps are filled, the expansion fiber frames are of a three-dimensional bird nest type structure formed by interweaving high-strength polypropylene fiber materials, the high-strength expansion mechanism supports the swelling adhesive tape body in strength through the three-dimensional bird nest structure, and the protective layer is matched to resist the impact influence of external force, so that the swelling adhesive tape body is not easy to shrink.
Further, the outer end of inflation fibre frame is the nest shape setting, the inflation fibre frame adopts high strength polypropylene fibre fiber material to make, the inoxidizing coating adopts the expandable polystyrene material to make, the inflation fibre frame of making through using the high strength polypropylene fibre material to set to three-dimensional nest shape, make it have certain intensity to support, cooperate its high strength performance and tensile strength ability, support the clearance between electric core and the casing effectively to be filled to the swelling sticky tape body, and the inoxidizing coating of using the expandable polystyrene material to make has excellent lasting heat preservation heat-proof quality, unique buffering shock resistance, ageing resistance, reduce the influence of temperature and vibrations impact to the inflation fibre frame, guarantee its stable continuous intensity support.
Further, the gas-expansion cooling mechanism comprises a built-in straight cylinder arranged in the expansion fiber frame, a plurality of uniformly distributed gas guide pipes are fixedly connected between the built-in straight cylinder and three cooling lantern rings, the gas guide pipes are respectively communicated with the built-in straight cylinder and the inside of the cooling lantern rings, the inner wall of the built-in straight cylinder is connected with two symmetrical pistons in a sliding manner, a telescopic spring is fixedly connected between the two pistons, the upper end and the lower end of the built-in straight cylinder are fixedly connected with elastic expansion airbags, a via hole is drilled between each elastic expansion airbag and the built-in straight cylinder, ammonium chloride powder is arranged inside the cooling lantern rings, the gas-expansion cooling mechanism enables the ammonium chloride powder to be heated and decomposed by means of high temperature, absorbs heat, reduces the temperature of the swelling adhesive tape body, enables the swelling adhesive tape body to keep high expansion rate without shrinkage at high temperature, simultaneously reduces the loss of electrolyte, and the ammonium chloride powder is decomposed into hydrogen chloride gas and ammonia gas to overflow into the built-in straight cylinder, the two pistons are pushed to be away from each other, the air in the built-in straight cylinder is extruded to be blown into the elastic expansion air bag, so that the elastic expansion air bag is expanded, and the vibration influence in the use process is reduced through full air.
Furthermore, the outer end fixedly connected with sealing washer of piston, the outer end of sealing washer and the inner wall in close contact with of built-in straight section of thick bamboo, through the setting of sealing washer, make hydrogen chloride gas and ammonia be difficult for taking place the infiltration through the gap between piston and the built-in straight section of thick bamboo, improve the leakproofness.
Furthermore, the inner wall of the via hole is fixedly connected with a rubber sealing sheet, the initial state of the rubber sealing sheet is a closed state, the rubber sealing sheet is arranged to block air in the built-in straight cylinder from being blown into the elastic expansion air bag in the closed state, and the rubber sealing sheet is in an open state under the action of gas extrusion, so that the circulation of gas between the built-in straight cylinder and the elastic expansion air bag is realized.
Further, the buffering consumes mechanism of shaking includes two storage utricules with inflation fibre frame outer end fixed connection, the inside of storage utricule is equipped with the buffer fluid, the initial condition of buffer fluid is the soft state, in the lithium cell use, often can receive the vibration influence to on transmitting the swelling sticky tape body, the buffering consumes the mechanism of shaking and consumes the vibration impact force on the swelling sticky tape body through the phase change of buffer fluid, the elasticity inflation gasbag of cooperation inflation slows down the vibration impact, makes its inside structure be difficult for receiving the influence, guarantees the stable intensity support that lasts of inflation fibre frame, makes the swelling sticky tape body keep good inflation and bonding effect, guarantees the gap filling between electric core and the casing.
Further, the surface of storage utricule is equipped with the polyurethane layer, buffer fluid adopts D3O macromolecular material to make, and through the setting on polyurethane layer, can disperse the vibration impact force that the storage utricule received everywhere to the storage utricule, reduce the harm, buffer fluid that D3O macromolecular material made simultaneously is under the influence of vibration impact force, and its inside intermolecular locks each other at once, thereby it hardens the digestion vibration impact force rapidly, form one deck inoxidizing coating, after the vibration impact force disappears, buffer fluid can resume its primary soft state.
A swelling method of a swelling adhesive tape based on a lithium battery gap comprises the following steps:
s1, when the swelling adhesive tape body expands to fill the gap between the battery cell and the shell, the swelling fiber frame is matched with the protective layer to support the swelling adhesive tape body in strength, so that impact influence in the use process is resisted, and the bonding and expansion effects are guaranteed;
s2, when the swelling tape is affected by high temperature, the ammonium chloride powder is heated and decomposed, absorbs heat and reduces temperature, the high-temperature effect is reduced, the swelling tape body keeps high expansion rate at high temperature without shrinkage, and meanwhile, the loss of electrolyte is reduced;
s3, decomposing hydrogen chloride gas and ammonia gas by ammonium chloride powder, overflowing outwards, extruding air in the built-in straight cylinder, blowing the air into the elastic expansion air bag, expanding the air, and consuming vibration impact force in the use process by matching with phase change of buffer fluid to form a protective layer to ensure stable expansion filling of the swelling adhesive tape body.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme is that the swelling rubber belt body is supported at a certain strength when being expanded in electrolyte through the three-dimensional bird nest type swelling fiber frame in the high-strength expansion mechanism in a matching mode, so that the swelling rubber belt body is not easy to shrink, the bonding effect is enhanced, the air-bulking temperature reduction mechanism is decomposed by means of heat absorption of ammonium chloride powder, the temperature of the swelling rubber belt body is reduced, high-temperature influence is reduced, the swelling rubber belt body keeps high expansion rate at high temperature without shrinkage, decomposed hydrogen chloride gas and ammonia overflow, the elastic expansion air bag is pushed to expand outwards, the phase change of buffer fluid in the vibration dissipation mechanism is matched, vibration impact influence is absorbed, the impact force is consumed, a protective layer is formed, the impact influence is not easy to be transmitted to the swelling fiber frame, the high-strength expansion support of the swelling rubber belt body is guaranteed, the temperature and vibration impact influence are reduced, and the service life of the swelling rubber belt body is prolonged.
(2) The base layer is made of a polyethylene film material, the adhesive layer is made of a polyacrylate pressure-sensitive adhesive material, the base layer made of the polyethylene film material has good tensile resistance, breaking resistance and abrasion resistance, and the adhesive layer made of the polyacrylate pressure-sensitive adhesive material has the characteristics of good low temperature resistance, good high temperature resistance, low condensable volatile matter and quality loss rate, no harmful gas escape, safety and environmental protection.
(3) The high-strength expansion mechanism comprises a plurality of expansion fiber frames arranged in a base layer, three cooling lantern rings are arranged on the expansion fiber frames, the diameters of the three cooling lantern rings are sequentially increased from inside to outside, the outer ends of the expansion fiber frames are provided with protective layers, the expansion adhesive tape body expands under the soaking of electrolyte, the thickness of the expansion adhesive tape body is increased by multiple times, gaps are filled, the expansion fiber frames are of a three-dimensional bird nest type structure formed by interweaving high-strength polypropylene fiber materials, the high-strength expansion mechanism supports the expansion of the expansion adhesive tape body in strength through the three-dimensional bird nest structure, the protective layers are matched to resist the influence of external impact, and the expansion adhesive tape body is not easy to shrink.
(4) The outer end of inflation fibre frame is the nest form setting, the inflation fibre frame adopts high strength polypropylene fibre fiber material to make, the inoxidizing coating adopts the expandable polystyrene material to make, the inflation fibre frame of making through using the high strength polypropylene fibre material, and set to three-dimensional bird's nest form, make it have certain intensity to support, cooperate its high strength performance and tensile property, support the clearance between electric core and the casing of effectively filling of swelling sticky tape body, and the inoxidizing coating that the expandable polystyrene material was made has excellent lasting heat preservation heat-proof quality, unique buffering shock resistance, the ageing resistance, reduce the influence of temperature and vibrations impact on the inflation fibre frame, guarantee its stable continuous intensity support.
(5) The air-bulking cooling mechanism comprises a built-in straight cylinder arranged in an expansion fiber frame, a plurality of air guide pipes which are uniformly distributed are fixedly connected between the built-in straight cylinder and three cooling lantern rings, the air guide pipes are respectively communicated with the insides of the built-in straight cylinder and the cooling lantern rings, two symmetrical pistons are slidably connected to the inner wall of the built-in straight cylinder, a telescopic spring is fixedly connected between the two pistons, elastic expansion air bags are fixedly connected to the upper end and the lower end of the built-in straight cylinder, a via hole is drilled between each elastic expansion air bag and the built-in straight cylinder, ammonium chloride powder is arranged inside the cooling lantern rings, the air-bulking cooling mechanism enables the ammonium chloride powder to be heated and decomposed by means of high temperature, absorbs heat, reduces the temperature of a swelling adhesive tape body, enables the swelling adhesive tape body to keep high expansion rate at high temperature without shrinkage, simultaneously reduces the loss of electrolyte, and enables the ammonium chloride powder to be decomposed into hydrogen chloride gas and ammonia gas to overflow into the built-in straight cylinder, the two pistons are pushed to be away from each other, the air in the built-in straight cylinder is extruded to be blown into the elastic expansion air bag, so that the elastic expansion air bag is expanded, and the vibration influence in the use process is reduced through full air.
(6) The outer end of the piston is fixedly connected with a sealing ring, the outer end of the sealing ring is in close contact with the inner wall of the built-in straight cylinder, and the arrangement of the sealing ring enables hydrogen chloride gas and ammonia gas not to permeate through a gap between the piston and the built-in straight cylinder easily, so that the sealing performance is improved.
(7) The inner wall fixedly connected with rubber mounting of conducting hole, the initial condition of rubber mounting is the closure state, through the setting of rubber mounting, blocks the air in the built-in straight section of thick bamboo under the closure state and bloies into the elasticity inflation gasbag, and under the gas extrusion effect, then is in the state of opening, realizes the circulation of gaseous between built-in straight section of thick bamboo and the elasticity inflation gasbag.
(8) The buffering is consumed the mechanism that shakes and is included two storage utricules with inflation fibre frame outer end fixed connection, the inside of storage utricule is equipped with buffer fluid, buffer fluid's initial condition is the soft state, in the lithium cell use, often can receive the vibration influence, and transmit on the swelling sticky tape body, the buffering is consumed the mechanism that shakes and consumes the vibration impact force on the swelling sticky tape body through buffer fluid's phase state change, the elastic expansion gasbag of cooperation inflation slows down the vibration impact, make its inside structure be difficult for receiving the influence, guarantee that the stable intensity that lasts of inflation fibre frame supports, make the swelling sticky tape body keep good inflation and bonding effect, guarantee the gap filling between electric core and the casing.
(9) The surface of storage utricule is equipped with the polyurethane layer, buffer fluid adopts D3O macromolecular material to make, setting through the polyurethane layer, can disperse the vibration impact force that the storage utricule received everywhere to the storage utricule, reduce the harm, buffer fluid that D3O macromolecular material made simultaneously is under the influence of vibration impact force, its inside intermolecular locks each other at once, thereby it hardens the digestion vibration impact force fast, form one deck inoxidizing coating, after the vibration impact force disappears, buffer fluid can resume its initial soft state.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of a partial cross-sectional structure of a base layer according to the present invention;
FIG. 4 is a schematic perspective view of the high-strength expansion mechanism of the present invention;
FIG. 5 is a schematic perspective view of the inflatable cooling mechanism according to the present invention;
FIG. 6 is a schematic cross-sectional view of the internal cylinder of the present invention;
FIG. 7 is a schematic perspective view of the damping and vibration-dissipating mechanism according to the present invention;
figure 8 is a schematic cross-sectional view of a storage bladder according to the present invention.
The reference numbers in the figures illustrate:
100. swelling the adhesive tape body; 200. a base layer; 300. a glue layer; 400. a high-strength expansion mechanism; 401. an expandable fiber frame; 402. cooling the lantern ring; 500. an inflatable cooling mechanism; 501. a straight cylinder is arranged inside; 502. a gas-guide tube; 503. ammonium chloride powder; 504. a piston; 505. a tension spring; 506. an elastically expandable balloon; 507. a rubber sealing sheet; 600. a buffer vibration-consuming mechanism; 601. a storage bag body; 602. a buffer fluid.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; 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 those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-8, a swelling tape based on a lithium battery gap and a swelling method thereof includes a swelling tape body 100, the swelling tape body 100 includes a base layer 200 and a glue layer 300, the base layer 200 is provided with a high strength expansion mechanism 400 and an air expansion cooling mechanism 500, the high strength expansion mechanism 400 is provided with a buffering vibration dissipation mechanism 600, the swelling tape body 100 is supported with a certain strength when expanding in an electrolyte by a three-dimensional bird nest type expansion fiber frame 401 in the high strength expansion mechanism 400 and a protective layer, so that the swelling tape body is not easy to shrink, the bonding effect is enhanced, the air expansion cooling mechanism 500 utilizes the heat absorption decomposition of ammonium chloride powder 503 to reduce the temperature of the swelling tape body 100, reduce the influence of high temperature, keep the high expansion rate without shrinkage at high temperature, and the decomposed hydrogen chloride gas and ammonia gas overflow to push an elastic expansion airbag 506 to expand outwards, the phase change of the buffer fluid 602 in the buffer vibration dissipation mechanism 600 is matched to absorb the impact of vibration and shock, so as to form a protective layer, so that the impact is not easy to transfer to the expansion fiber frame 401, thereby ensuring the high-strength expansion support of the swelling tape body 100, reducing the impact of temperature and vibration and prolonging the service life of the swelling tape body.
Referring to fig. 2, the base layer 200 is made of a polyethylene film material, the adhesive layer 300 is made of a polyacrylate pressure-sensitive adhesive material, the base layer 200 made of the polyethylene film material has good tensile strength, breaking resistance and abrasion resistance, and the adhesive layer 300 made of the polyacrylate pressure-sensitive adhesive material has good low temperature resistance, high temperature resistance, low condensable volatile matter and low mass loss rate, and has no harmful gas escape characteristics, and is safe and environment-friendly.
Referring to fig. 3-4, the high strength expansion mechanism 400 includes a plurality of expansion fiber frames 401 installed in the base layer 200, three cooling collars 402 are installed on the expansion fiber frames 401, the diameters of the three cooling collars 402 are sequentially increased from inside to outside, a protective layer is installed at the outer ends of the expansion fiber frames 401, the expansion adhesive tape body 100 expands under the immersion of the electrolyte, the thickness is increased by several times, so as to fill the gap, the expansion fiber frames 401 are a three-dimensional bird nest structure formed by interweaving high strength polypropylene fiber materials, the high strength expansion mechanism 400 supports the expansion of the expansion adhesive tape body 100 by the three-dimensional bird nest structure, and the protective layer is matched to resist the impact effect of external force, so that the expansion adhesive tape body is not easy to shrink.
Referring to fig. 3-4, the outer end of the expandable fiber frame 401 is in a bird nest shape, the expandable fiber frame 401 is made of high-strength polypropylene fiber material, the protective layer is made of expandable polystyrene material, the expandable fiber frame 401 made of high-strength polypropylene fiber material is arranged in a three-dimensional bird nest shape, so that the expandable fiber frame 401 has certain strength support, and the protective layer supports the expandable adhesive tape body 100 to effectively fill the gap between the battery cell and the casing in cooperation with the high-strength performance and the tensile performance of the expandable polystyrene fiber frame, and the protective layer made of expandable polystyrene material has excellent and durable heat insulation, unique buffering shock resistance and aging resistance, reduces the influence of temperature and shock on the expandable fiber frame 401, and ensures stable and continuous strength support.
Referring to fig. 3-6, the inflatable cooling mechanism 500 includes an internal straight cylinder 501 disposed in the expandable fiber frame 401, a plurality of air ducts 502 uniformly distributed are fixedly connected between the internal straight cylinder 501 and the three cooling collars 402, the air ducts 502 are respectively communicated with the internal straight cylinder 501 and the cooling collars 402, two symmetrical pistons 504 are slidably connected to the inner wall of the internal straight cylinder 501, a telescopic spring 505 is fixedly connected between the two pistons 504, elastic expansion airbags 506 are fixedly connected to the upper and lower ends of the internal straight cylinder 501, a via hole is drilled between the elastic expansion airbags 506 and the internal straight cylinder 501, ammonium chloride powder 503 is disposed inside the cooling collars 402, the inflatable cooling mechanism 500 decomposes the ammonium chloride powder 503 by heating at high temperature to absorb heat and reduce the temperature of the swelling adhesive tape body 100 so that the swelling adhesive tape body 100 maintains high expansion rate without shrinkage at high temperature, meanwhile, the loss of electrolyte is reduced, the ammonium chloride powder 503 is decomposed into hydrogen chloride gas and ammonia gas which overflow into the built-in straight cylinder 501, the two pistons 504 are pushed to be away from each other, the air in the built-in straight cylinder 501 is extruded to be blown into the elastic expansion air bag 506 to be expanded, and the vibration influence in the using process is reduced through full air.
Referring to fig. 6, the outer end of the piston 504 is fixedly connected with a sealing ring, the outer end of the sealing ring is in close contact with the inner wall of the internal straight cylinder 501, the arrangement of the sealing ring makes the hydrogen chloride gas and the ammonia gas not easy to permeate through the gap between the piston 504 and the internal straight cylinder 501, so as to improve the sealing performance, the inner wall of the via hole is fixedly connected with a rubber sealing sheet 507, the initial state of the rubber sealing sheet 507 is a closed state, the air in the internal straight cylinder 501 is blocked from being blown into the elastic expansion air bag 506 in the closed state through the arrangement of the rubber sealing sheet 507, and the rubber sealing sheet is in an open state under the action of gas extrusion, so as to realize the gas circulation between the internal straight cylinder 501 and the elastic expansion air bag 506.
Referring to fig. 3-8, the buffering vibration-dissipating mechanism 600 includes two storage bag bodies 601 fixedly connected to the outer ends of the expandable fiber frame 401, a buffering fluid 602 is disposed inside the storage bag bodies 601, the initial state of the buffering fluid 602 is a soft state, and is often influenced by vibration and transmitted to the expandable tape body 100 during the use of the lithium battery, the buffering vibration-dissipating mechanism 600 consumes the vibration impact force on the expandable tape body 100 through the phase change of the buffering fluid 602, and the internal structure is not easily influenced by the vibration impact slowed down by the expandable elastic expandable air bag 506, so as to ensure the stable and continuous strength support of the expandable fiber frame 401, keep the expandable tape body 100 in good expansion and bonding effects, and ensure the gap filling between the battery cell and the housing.
Referring to fig. 7-8, a polyurethane layer is disposed on the surface of the storage bladder 601, the buffer fluid 602 is made of D3O polymer material, and the arrangement of the polyurethane layer can disperse the vibration impact force applied to the storage bladder 601, so as to reduce the damage, and meanwhile, the buffer fluid 602 made of D3O polymer material is under the influence of the vibration impact force, and its inner molecules are locked with each other immediately, and are rapidly tightened and hardened to digest the vibration impact force, so as to form a protective layer, and when the vibration impact force disappears, the buffer fluid 602 will return to its original soft state.
A swelling method of a swelling adhesive tape based on a lithium battery gap comprises the following steps:
s1, when the swelling tape body 100 expands to fill the gap between the battery core and the shell, the expansion fiber frame 401 is matched with the protective layer to support the battery core in strength, so that impact influence in the use process is resisted, and the bonding and expansion effects are guaranteed;
s2, when the high temperature is influenced, the ammonium chloride powder 503 is heated and decomposed, absorbs heat and reduces temperature, so that the influence of the high temperature is reduced, the swelling adhesive tape body 100 keeps high expansion rate at the high temperature without shrinkage, and meanwhile, the loss of electrolyte is reduced;
s3, decomposing hydrogen chloride gas and ammonia gas by ammonium chloride powder 503 to overflow outwards, extruding the air in the built-in straight cylinder 501 to blow into the elastic expansion air bag 506 to expand, and consuming the vibration impact force in the use process by matching with the phase change of the buffer fluid 602 to form a protective layer to ensure the stable expansion filling of the swelling adhesive tape body 100.
In the invention, the swelling adhesive tape body 100 is adhered between the battery core and the shell, and expands under the soaking of the electrolyte to fill the gap between the battery core and the shell, the swelling fiber frame 401 carries out strength support along with the expansion of the swelling adhesive tape body 100 through the three-dimensional bird nest structure, and is matched with the protective layer to resist the impact influence of vibration in the use process, after the temperature rises, the ammonium chloride powder 503 is heated and decomposed to absorb heat, the temperature of the swelling adhesive tape body 100 is reduced, so that the swelling adhesive tape body keeps high expansion multiplying power at high temperature without shrinkage, meanwhile, the loss of the electrolyte is reduced, the ammonium chloride powder 503 is decomposed into hydrogen chloride gas and ammonia gas which overflow into the built-in straight cylinder 501, the two pistons 504 are pushed away from each other, the air in the built-in straight cylinder 501 is extruded to be blown into the elastic swelling air bag 506 to expand the swelling adhesive tape body 100, and meanwhile, the storage bag body 601 in the swelling adhesive tape body 100 is influenced by the impact of vibration, the buffer fluid 602 is driven to change phase, so that the inner molecules of the buffer fluid are locked with each other immediately and are converted from a soft state to a hard state to form a protective layer, and the vibration impact force is consumed by matching with the expansion support of the elastic expansion air bag 506, so that the impact force is not easily transmitted to the expansion fiber frame 401, the damage to the internal structure of the swelling adhesive tape body 100 is reduced, and the stable expansion filling is performed.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.

Claims (10)

1. The utility model provides a swelling sticky tape based on lithium cell gap, includes swelling sticky tape body (100), its characterized in that: the swelling adhesive tape comprises a swelling adhesive tape body (100) and is characterized in that the swelling adhesive tape body (100) comprises a base layer (200) and an adhesive layer (300), a high-strength expansion mechanism (400) and an air inflation cooling mechanism (500) are respectively arranged in the base layer (200), and a buffering vibration dissipation mechanism (600) is arranged on the high-strength expansion mechanism (400).
2. The lithium battery slot-based swelling tape according to claim 1, wherein: the base layer (200) is made of polyethylene film materials, and the adhesive layer (300) is made of polyacrylate pressure-sensitive adhesive materials.
3. The lithium battery slot-based swelling tape according to claim 1, wherein: the high-strength expansion mechanism (400) comprises a plurality of expansion fiber frames (401) installed in the base layer (200), three cooling lantern rings (402) are installed on the expansion fiber frames (401), the diameters of the three cooling lantern rings (402) are sequentially increased from inside to outside, and the outer ends of the expansion fiber frames (401) are provided with protective layers.
4. The lithium battery slot-based swelling tape according to claim 3, wherein: the outer end of inflation fibre frame (401) is the nest shape setting, inflation fibre frame (401) adopt high strength polypropylene fibre fiber material to make, the inoxidizing coating adopts the expandable polystyrene material to make.
5. The lithium battery slot-based swelling tape according to claim 3, wherein: the physiosis cooling mechanism (500) is including setting up built-in straight section of thick bamboo (501) in inflation fibre frame (401), a plurality of evenly distributed's of fixedly connected with air duct (502) between built-in straight section of thick bamboo (501) and the three cooling lantern ring (402), and air duct (502) are linked together with the inside of built-in straight section of thick bamboo (501) and cooling lantern ring (402) respectively, the inner wall sliding connection of built-in straight section of thick bamboo (501) has two symmetrical pistons (504), and fixedly connected with expanding spring (505) between two pistons (504), the equal fixedly connected with elasticity inflation gasbag (506) in upper and lower both ends of built-in straight section of thick bamboo (501), and division has the conducting hole between elasticity inflation gasbag (506) and built-in straight section of thick bamboo (501), the inside of cooling lantern ring (402) is equipped with ammonium chloride powder (503).
6. The lithium battery slot-based swelling tape according to claim 5, wherein: the outer end of the piston (504) is fixedly connected with a sealing ring, and the outer end of the sealing ring is in close contact with the inner wall of the built-in straight cylinder (501).
7. The lithium battery slot-based swelling tape according to claim 5, wherein: the inner wall of the via hole is fixedly connected with a rubber sealing sheet (507), and the initial state of the rubber sealing sheet (507) is a closed state.
8. The lithium battery slot-based swelling tape according to claim 3, wherein: the buffering vibration-consuming mechanism (600) comprises two storing bag bodies (601) fixedly connected with the outer end of the expansion fiber frame (401), buffering fluid (602) is arranged inside the storing bag bodies (601), and the initial state of the buffering fluid (602) is a soft state.
9. The lithium battery slot-based swelling tape according to claim 8, wherein: the surface of the storage bag body (601) is provided with a polyurethane layer, and the buffer fluid (602) is made of D3O high polymer material.
10. The swelling method of the swelling tape based on lithium battery slits as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:
s1, when the swelling adhesive tape body (100) expands to fill the gap between the battery core and the shell, the swelling fiber frame (401) is matched with the protective layer to support the swelling adhesive tape body in strength, so that impact influence in the using process is resisted, and the bonding and swelling effects are guaranteed;
s2, when the high-temperature influence is received, the ammonium chloride powder (503) is heated and decomposed, absorbs heat and cools, and reduces the influence of the high temperature, so that the swelling adhesive tape body (100) keeps high expansion rate without shrinkage at the high temperature, and meanwhile, the loss of electrolyte is reduced;
s3, decomposing hydrogen chloride gas and ammonia gas by ammonium chloride powder (503) to overflow outwards, extruding air in the built-in straight cylinder (501) to be blown into the elastic expansion air bag (506) to expand the air, and consuming the vibration impact force in the use process by matching with the phase change of the buffer fluid (602) to form a protective layer to ensure the stable expansion filling of the swelling adhesive tape body (100).
CN202210570672.0A 2022-05-24 2022-05-24 Swelling adhesive tape based on lithium battery gaps and swelling method thereof Pending CN114854319A (en)

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