Insulating tape
By using a multi-layered insulating tape design, the problem of insufficient dielectric strength in insulating tapes for lithium batteries is solved, achieving current leakage prevention and electrical safety assurance, and extending the service life of lithium batteries.
Patent Information
- Application Number
- CN202520076302.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing insulating tapes for lithium batteries have limited dielectric strength, making it difficult to effectively prevent current leakage and posing electrical safety hazards.
The insulating tape structure consists of an adhesive buffer layer, a reinforcing layer, a wear-resistant layer, and a transition layer. The adhesive buffer layer enhances adhesion through raised blocks and hollow raised particles, the reinforcing layer improves dielectric strength through its resistive and protective layers, the wear-resistant layer enhances wear resistance through its grooved structure, and the transition layer connects the layers to enhance bonding strength.
It enhances the interlayer bonding of the tape, improves dielectric strength, effectively blocks current leakage, ensures the electrical safety of lithium batteries during charging and discharging, extends service life, and resists electrolyte corrosion and external friction damage.
Smart Images
Figure CN223752674U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of adhesive tape, concretely to an insulating adhesive tape. BACKGROUND
[0002] One of the main functions of the insulating adhesive tape is to separate the positive and negative electrode sheets, and with its high dielectric strength, it effectively prevents abnormal conduction of electric current between the electrode sheets, ensuring that the electric current flows along the designed path during the charging and discharging process of the lithium battery, avoiding serious safety accidents such as battery overheating, fire, and even explosion caused by short circuit.
[0003] The existing insulating adhesive tape for lithium batteries still has some problems: most traditional insulating adhesive tapes only have one layer of insulating material, such as the commonly used PVC (polyvinyl chloride) material. Although this layer of insulating material can play an insulating role to some extent, its dielectric strength is limited. In the face of high-voltage and strong-current working environments, it is difficult to effectively block the leakage of electric current, which can easily cause electrical safety problems.
[0004] Therefore, there is an urgent need for an insulating adhesive tape to solve the above problems. SUMMARY
[0005] Based on the above, the purpose of the utility model is to provide an insulating adhesive tape to solve the problem of limited dielectric strength of the insulating adhesive tape.
[0006] To solve the above technical problems, the utility model adopts the following technical scheme: an insulating adhesive tape, comprising:
[0007] An adhesive tape body formed by connecting a bonding buffer layer, a reinforcing layer, and a wear-resistant layer in sequence;
[0008] A transition layer is provided between the bonding buffer layer and the reinforcing layer, and the transition layer is used to tightly connect the bonding buffer layer and the reinforcing layer.
[0009] As a preferred scheme of the insulating adhesive tape, the bonding surface of the bonding buffer layer is provided with protruding blocks, and the protruding blocks are provided with a plurality of protruding blocks, which are uniformly distributed on the bonding surface of the bonding buffer layer.
[0010] As a preferred scheme of the insulating adhesive tape, the bonding surface of the bonding buffer layer is provided with hollow protruding particles, and the hollow protruding particles are provided with a plurality of hollow protruding particles, which are uniformly distributed on the bonding surface of the bonding buffer layer.
[0011] As a preferred scheme of the insulating adhesive tape, the reinforcing layer includes an electrically resistive layer and a protective layer, the protective layer is provided on both sides of the electrically resistive layer, the protective layer is used to protect the electrically resistive layer, and the electrically resistive layer is used to block the electric current.
[0012] As a preferred solution of the insulating adhesive tape, the surface of the wear-resistant layer is provided with grooves, and the grooves are provided with a plurality of grooves which are uniformly distributed on the surface of the wear-resistant layer.
[0013] As a preferred solution of the insulating adhesive tape, a rubber tube is further included, and the adhesive tape body is wound on the outer circumferential surface of the rubber tube, and the rubber tube is used for winding and collecting the adhesive tape body.
[0014] As a preferred solution of the insulating adhesive tape, a label assembly is further included and arranged in the interior of the rubber tube, and the label assembly is used for marking the adhesive tape body and the lithium battery.
[0015] As a preferred solution of the insulating adhesive tape, the label assembly includes a rotating shaft and a label adhesive tape body, the rotating shaft is rotatably arranged in the rubber tube, and the label adhesive tape body is wound on the outer circumferential surface of the rotating shaft.
[0016] As a preferred solution of the insulating adhesive tape, the adhesive buffer layer is composed of silicone rubber, and the adhesive buffer layer made of silicone rubber is used for adhering to the metal surface of the lithium battery pole piece.
[0017] As a preferred solution of the insulating adhesive tape, the wear-resistant layer is composed of fluororubber, and the wear-resistant layer made of fluororubber is used for resisting the corrosion of acid, alkali and organic solvent in the lithium battery electrolyte.
[0018] The adhesive tape has the advantages that: the adhesive buffer layer, the reinforcing layer, the wear-resistant layer and the transition layer are arranged, the lithium battery is protected, the transition layer is arranged to connect the layers, the interlayer bonding force of the adhesive tape is enhanced, the layers will not be delaminated or peeled under the action of complex external forces such as stretching, bending and torsion, and the stability of the adhesive tape structure is ensured, the reinforcing layer is arranged, the dielectric strength of the adhesive tape is improved, the current leakage is effectively blocked, the lithium battery can also be stably operated during charging and discharging, and the electrical safety of the lithium battery is ensured, the adhesive buffer layer is arranged, the impact force generated by daily use, transportation bumping or accidental vibration is effectively buffered, the internal structure of the lithium battery is prevented from being damaged due to vibration, and the service life of the lithium battery is prolonged, the wear-resistant layer is arranged to protect the adhesive tape, the corrosion of the electrolyte and the damage of friction and scratching from the outside are effectively resisted, the integrity of the structure of the layers in the adhesive tape is maintained, and the insulation performance and the adhesion effect of the adhesive tape are not affected. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 An enlarged overall structure schematic view of a first direction of an adhesive tape body in the insulating adhesive tape is provided in the utility model;
[0020] Figure 2 An enlarged overall structure schematic view of a second direction of an adhesive tape body in the insulating adhesive tape is provided in the utility model;
[0021] Figure 3 The utility model provides a whole structure schematic drawing of reinforcing layer in insulating adhesive tape;
[0022] Figure 4 The utility model provides a whole structure schematic drawing of label assembly in insulating adhesive tape;
[0023] Figure 5 The utility model provides an explosion map of label assembly in insulating adhesive tape.
[0024] Among them, the reference numeral in the drawing: 1, adhesive tape body;2, adhesive buffer layer;3, reinforcing layer;31, electric resistance layer;32, protective layer;4, wear-resistant layer;5, transition layer;6, convex block;7, hollow convex particle;8, groove;9, rubber cylinder;10, label assembly;101, pivot;102, label adhesive tape body. DETAILED DESCRIPTION
[0025] The utility model will be further explained in detail below in combination with the drawings and examples.It can be understood that the specific examples described here are only used to explain the utility model and not limit the utility model.In addition, it should be noted that, for the convenience of description, only the part related to the utility model is shown in the drawing and not all structures.
[0026] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated;It can be mechanically connected, or electrically connected;It can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship of two elements.The above-mentioned terms in the utility model can be understood according to the specific meaning of the above-mentioned terms in the utility model.
[0027] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them.In addition, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0028] In the description of the embodiments, the terms "upper", "lower", "left", "right", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0029] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0030] In an embodiment of the utility model, as shown in Figures 1-5 The transition layer 5 is arranged between the adhesive buffer layer 2 and the reinforcing layer 3, and the transition layer 5 is used to tightly connect the adhesive buffer layer 2 and the reinforcing layer 3.
[0031] The insulating adhesive tape provided by the utility model realizes the protection of the lithium battery through the adhesive buffer layer 2, the reinforcing layer 3, the wear-resistant layer 4 and the transition layer 5. By arranging the transition layer 5 to connect each layer, the interlayer bonding force of the adhesive tape is enhanced, and under the action of complex external forces such as stretching, bending and torsion, the layers will not appear delamination and peeling, and the stability of the adhesive tape structure is ensured. By arranging the reinforcing layer 3, the dielectric strength of the adhesive tape is improved, the current leakage is effectively blocked, and the lithium battery can also operate stably during charging and discharging, and the electrical safety of the lithium battery is ensured. By arranging the adhesive buffer layer 2, the impact force generated by daily use, transportation bumps or accidental vibration is effectively buffered, the internal structure of the lithium battery is prevented from being damaged due to vibration, and the service life of the lithium battery is prolonged. By arranging the wear-resistant layer 4 to protect the adhesive tape, the corrosion of electrolyte and the damage of friction and scratching from the outside are effectively resisted, the integrity of the internal structure of the adhesive tape is maintained, and the insulation performance and adhesion effect of the adhesive tape are not affected.
[0032] Preferably, the adhesive buffer layer 2 can be selected from soft and high-elasticity silicone rubber, and the thickness is about 0.03-0.05mm. The silicone rubber molecular chain is flexible and contains polar silicon-oxygen bonds, so that it has strong affinity to the metal surface of the lithium battery pole piece and can realize tight and seamless adhesion.
[0033] Preferably, the reinforcing layer 3 comprises an electrically resistive layer 31 and a protective layer 32 arranged on both sides of the electrically resistive layer 31, the protective layer 32 is used to protect the electrically resistive layer 31, and the electrically resistive layer 31 is used to block the current. Preferably, the electrically resistive layer 31 can be made of polyimide (PI). Preferably, the protective layer 32 can be made of nano-sized alumina (insulating adhesive tape Al2O3) filler and a small amount of mica powder. The electrically resistive layer 31 can be made of polyimide (PI) as the matrix, and the protective layer 32 can be uniformly mixed with nano-sized alumina (insulating adhesive tape Al2O3) filler and a small amount of mica powder. The middle layer is a pure PI layer, which can block the current by using the high dielectric property of PI. The two sides are PI and filler composite layers, the filler strengthens the local insulation in this part, and due to the existence of the composite layers on both sides, when encountering external puncture and the like, the stress can be dispersed, the integrity of the middle pure PI layer is protected, and the overall insulation performance is maintained.
[0034] Preferably, the wear-resistant layer 4 can be made of fluororubber, which has excellent chemical stability. The fluorine atoms in the molecular structure of fluororubber form strong polar bonds, which can effectively resist the corrosion of acids, bases and organic solvents in lithium battery electrolyte.
[0035] Preferably, the transition layer 5 can be made of glue containing silane coupling agent. A transition layer 5 containing silane coupling agent is coated between the inner silicone rubber layer and the middle PI composite layer. One end of the silane coupling agent molecule can react with the silicon-oxygen bond of the silicone rubber, and the other end can form a chemical bond with the active groups on the surface of PI, realizing strong chemical bonding connection, ensuring that the two layers are tightly combined, and preventing delamination and peeling during use.
[0036] Preferably, the bonding surface of the adhesive buffer layer 2 is provided with protruding blocks 6, and a plurality of protruding blocks 6 are uniformly distributed on the bonding surface of the adhesive buffer layer 2.
[0037] Preferably, the protruding blocks 6 are formed into small hemispherical protrusions through a micro-injection molding process. These protrusions can help expel air during the initial bonding process, ensuring tight fitting, and can also adaptively deform with the slight expansion and contraction of the electrode sheet during the charging and discharging process of the battery, continuously maintaining tight contact and preventing the formation of fitting gaps.
[0038] Preferably, the bonding surface of the adhesive buffer layer 2 is provided with hollow protruding particles 7, and a plurality of hollow protruding particles 7 are uniformly distributed on the bonding surface of the adhesive buffer layer 2. The protruding blocks 6 and the hollow protruding particles 7 can be arranged on the bonding surface of the adhesive buffer layer 2 at the same time. Preferably, the hollow protruding particles 7 can be hollow glass beads uniformly distributed in the silicone rubber layer, which can play a buffering and heat insulation role and reduce the impact of electrode sheet vibration and heat on the adhesive tape.
[0039] Preferably, the surface of the wear-resistant layer 4 is provided with grooves 8, and the grooves 8 are provided in plurality and uniformly distributed on the surface of the wear-resistant layer 4. On the surface of the outer fluororubber layer, the micro-grooves 8 are formed by a laser etching process. Preferably, the grooves 8 are distributed in a grid shape, which on the one hand increases the surface roughness and improves the wear resistance of the adhesive tape when in contact with the external environment, and on the other hand, the grooves 8 can guide the small amount of electrolyte or moisture that may come into contact to quickly flow away, reducing the residence time of the electrolyte or moisture on the surface of the adhesive tape and reducing the corrosion risk.
[0040] The insulating adhesive tape further comprises a rubber tube 9, the adhesive tape body 1 is wound around the outer circumferential surface of the rubber tube 9, and the rubber tube 9 is used for winding and collecting the adhesive tape body 1.
[0041] Specifically, the label assembly 10 is arranged in the interior of the rubber tube 9, and the label assembly 10 is used for marking the lithium battery. The label can adopt an NFC label, which is small in size and can be directly embedded in the plastic material of the rubber tube 9 without occupying extra space. The user only needs to use a smart phone or a device supporting NFC function to approach the rubber tube 9, and then the information such as product introduction, use precautions, after-sales contact information and the like of the lithium battery in the label can be quickly read. This not only facilitates the terminal user to understand the product, but also provides a new marketing and service channel for the enterprise, and the enterprise can push the product upgrade, preferential activities and the like through the new marketing and service channel.
[0042] Specifically, the label assembly 10 comprises a rotating shaft 101 and a label adhesive tape body 102, the rotating shaft 101 is rotatably arranged in the rubber tube 9, and the label adhesive tape body 102 is wound around the outer circumferential surface of the rotating shaft 101.
[0043] The rotating shaft 101 can be made of light plastic, which ensures good rotation flexibility, saves cost and is beneficial to user operation.
[0044] In the embodiment, the working process of tearing off the label is as follows: the rubber tube 9 is positioned, the label adhesive tape body 102 is rotated, the label adhesive tape body 102 is unwound on the rubber tube 9 through the rotating shaft 101, and then the label is torn off and pasted to a specific position, and then the lithium battery information is identified.
[0045] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed in the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and the equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiments within the scope of the technical solution of the present application are within the scope of the technical solution of the present application.
Claims
1. An insulating tape, characterized by, The adhesive tape comprises: a tape body formed by sequentially connecting an adhesive buffer layer, a reinforcing layer and a wear-resistant layer; a transition layer arranged between the adhesive buffer layer and the reinforcing layer, the transition layer being used for tightly connecting the adhesive buffer layer and the reinforcing layer.
2. The insulating tape according to claim 1, wherein The adhesive surface of the adhesive buffer layer is provided with protruding blocks, and the protruding blocks are uniformly distributed on the adhesive surface of the adhesive buffer layer.
3. An insulating tape according to claim 1 or 2, characterised in that The adhesive surface of the adhesive buffer layer is provided with hollow protruding particles, and the hollow protruding particles are uniformly distributed on the adhesive surface of the adhesive buffer layer.
4. An insulating tape according to claim 1 or 2, wherein The reinforcing layer comprises an electrically resistive layer and a protective layer, the protective layer is arranged on both sides of the electrically resistive layer, the protective layer is used for protecting the electrically resistive layer, and the electrically resistive layer is used for resisting current.
5. The insulating tape according to claim 1 or 2, wherein The surface of the wear-resistant layer is provided with grooves, and the grooves are uniformly distributed on the surface of the wear-resistant layer.
6. An insulating tape according to claim 1 or 2, wherein The adhesive tape further comprises a rubber tube, the tape body is wound on the outer circumferential surface of the rubber tube, and the rubber tube is used for winding and collecting the tape body.
7. An insulating tape according to claim 6, wherein The adhesive tape further comprises a label assembly arranged in the rubber tube, the label assembly is used for marking the tape body and the lithium battery.
8. An insulating tape according to claim 7, wherein The label assembly comprises a rotating shaft and a label tape body, the rotating shaft is rotatably arranged in the rubber tube, and the label tape body is wound on the outer circumferential surface of the rotating shaft.
9. An insulating tape according to claim 1 or 2 or 7 or 8, wherein The adhesive buffer layer is made of silicone rubber, and the adhesive buffer layer made of silicone rubber is used for adhering to the metal surface of the lithium battery pole piece.
10. An insulating tape according to claim 1 or 2 or 7 or 8, wherein The wear-resistant layer is made of fluororubber, and the wear-resistant layer made of fluororubber is used for resisting the corrosion of acid, alkali and organic solvent in the lithium battery electrolyte.