Electrolyte erosion resistant adhesive tape
By using a multi-layered, electrolyte-resistant tape, the problem of thin protective layers in traditional tapes is solved, achieving effective blocking of electrolyte and long-term stability of the tape, thus improving the protection effect of lithium batteries.
Patent Information
- Application Number
- CN202520085549.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Traditional electrolyte-eroded adhesive tapes have a thin protective layer that cannot effectively prevent electrolyte penetration, leading to damage to the adhesive layer and harming the lithium battery.
It adopts a multi-layer structure consisting of a hydrophobic nano-coating, a corrosion-resistant layer, a reinforcing layer, a buffer transition layer, and an adhesive layer, which are used to inhibit electrolyte penetration, enhance corrosion resistance, prevent damage, and ensure adhesion, respectively. The layers are connected by coating and hot pressing.
It improves the tape's resistance to electrolytes, enhances its overall strength and structural integrity, extends its service life, and ensures stable operation in lithium battery environments.
Smart Images
Figure CN223879667U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of adhesive tape body, specifically is a kind of electrolyte corrosion-resistant adhesive tape. BACKGROUND
[0002] Electrolyte corrosion-resistant adhesive tape is key in lithium battery production and use, it can protect internal components, prevent electrolyte corrosion and short circuit.
[0003] The existing electrolyte corrosion-resistant adhesive tape still has the following problems: the traditional electrolyte corrosion-resistant adhesive tape is generally composed of simple double-layer adhesive tape, one layer is the basic adhesive layer and the other layer is the protective layer. The protective layer can block the electrolyte to some extent, but the single-layer structure is relatively thin and is not conducive to the long-term contact of the adhesive tape with the electrolyte. The electrolyte can still penetrate into the adhesive layer through the small pores or edges of the protective film, causing damage to the adhesive layer and further easily causing harm to the lithium battery.
[0004] Therefore, there is an urgent need for an electrolyte corrosion-resistant adhesive tape to solve the above problems. SUMMARY
[0005] Based on the above, the purpose of the utility model is to provide an electrolyte corrosion-resistant adhesive tape to solve the problem of a relatively thin protective layer that is not conducive to the long-term contact of the adhesive tape with the electrolyte.
[0006] To solve the above technical problems, the utility model adopts the following technical scheme: an electrolyte corrosion-resistant adhesive tape, comprising:
[0007] An adhesive tape body composed of a hydrophobic nano coating, a corrosion-resistant layer, a reinforcing layer, a buffer transition layer and an adhesive layer connected in sequence;
[0008] The hydrophobic nano coating is used to inhibit the adsorption and initial penetration of the electrolyte;
[0009] The corrosion-resistant layer is used to enhance the corrosion resistance of the electrolyte;
[0010] The reinforcing layer is used to prevent damage to the adhesive tape body;
[0011] The buffer transition layer is used to further prevent damage to the adhesive tape body;
[0012] The adhesive layer is used to adhere to the use environment.
[0013] As a preferred scheme of the electrolyte corrosion-resistant adhesive tape, the surface of the hydrophobic nano coating is attached with protruding blocks, and a plurality of protruding blocks are uniformly distributed on the surface of the hydrophobic nano coating.
[0014] As a preferred solution of the electrolyte corrosion resistant adhesive tape, the corrosion resistant layer is composed of a microporous structure, and the microporous structure of the corrosion resistant layer is used to prolong the penetration time.
[0015] As a preferred solution of the electrolyte corrosion resistant adhesive tape, a rubber roller is further included, the adhesive tape body is wound on the outer peripheral surface of the rubber roller, and the rubber roller is used to collect the adhesive tape body by winding.
[0016] As a preferred solution of the electrolyte corrosion resistant adhesive tape, a collection shell is further included, a plurality of compartments are arranged in the collection shell, and the rubber roller is arranged in the plurality of compartments.
[0017] As a preferred solution of the electrolyte corrosion resistant adhesive tape, an outer surface of the compartment is provided with a seal, the seal is provided with a baffle, the seal is used to place the adhesive tape body, and the baffle is used to seal the seal.
[0018] As a preferred solution of the electrolyte corrosion resistant adhesive tape, the reinforcing layer is made of fibers and thermoplastic polyurethane, and the reinforcing layer is used to further enhance the protection of the adhesive tape body.
[0019] As a preferred solution of the electrolyte corrosion resistant adhesive tape, the buffer transition layer is made of silicone gel, and the buffer transition layer is used to further improve the buffering force.
[0020] As a preferred solution of the electrolyte corrosion resistant adhesive tape, the adhesive layer is composed of epoxy resin and tackifying resin, and the adhesive layer is used to improve the adhesive force.
[0021] As a preferred solution of the electrolyte corrosion resistant adhesive tape, the hydrophobic nano coating is composed of fluorosilane modified silicon dioxide nanoparticles, and the hydrophobic nano coating is used to increase the contact angle with the electrolyte.
[0022] The utility model discloses the beneficial effect is: through hydrophobic nano coating with extremely low surface energy, electrolyte is difficult to adhere and penetrate on its surface. Through the corrosion resistant layer, further block the electrolyte that breaks through the hydrophobic coating, improve the tolerance of the adhesive tape to electrolyte, ensure long-term stable work in the complex electrolyte environment of lithium battery. Through the reinforcing layer, the tensile strength of the whole is effectively enhanced, so that the adhesive tape body is not prone to fracture and deformation when bearing the pulling, extrusion in the lithium battery assembly process and various mechanical stresses in the use process, guarantee the structural integrity of the adhesive tape under various working conditions. Through the buffer transition layer, when the battery expands due to charging and discharging, or is impacted externally, the layer can effectively absorb and disperse stress, avoid damage to the adhesive tape and battery assembly due to stress concentration, prolong the service life of the adhesive tape and battery. Through the adhesive layer, ensure that the adhesive tape body is firmly attached to the lithium battery at all times, and play its protection role. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 An enlarged overall structure schematic view of the adhesive tape body in the electrolyte corrosion resistant adhesive tape provided by the utility model;
[0024] Figure 2 An overall structure schematic view of the adhesive tape body being loaded into the collection shell in the electrolyte corrosion resistant adhesive tape provided by the utility model;
[0025] Figure 3 An overall structure schematic view of the baffle being disassembled in the electrolyte corrosion resistant adhesive tape provided by the utility model;
[0026] Figure 4 An exploded view in Figure 2 .
[0027] In the drawings, the reference signs are as follows: 1, adhesive tape body; 2, hydrophobic nano coating; 3, corrosion resistant layer; 4, reinforcing layer; 5, buffer transition layer; 6, adhesive layer; 7, protruding block; 8, rubber roller; 9, collection shell; 10, compartment; 11, seal; 12, baffle. DETAILED DESCRIPTION
[0028] The utility model will be further described in detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings, not all the structures.
[0029] 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 it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0030] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is in second feature "on", "above" and "upper surface" include that first feature is in second feature directly above and obliquely above, or only indicate that first feature horizontal height is higher than second feature. First feature is in second feature "under", "below" and "under surface" include that first feature is in second feature directly below and obliquely below, or only indicate that first feature horizontal height is less than second feature.
[0031] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification 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, therefore cannot be understood as a limitation on the utility model.
[0032] In the description of the utility model, unless otherwise stated, 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.
[0033] In one embodiment of the utility model, as shown in Figure 1 As shown in the figure, a kind of electrolyte corrosion resistant adhesive tape is provided, including adhesive tape body 1 by hydrophobic nano coating 2, corrosion resistant layer 3, reinforcing layer 4, buffer transition layer 5 and adhesive layer 6 of sequentially connecting.Hydrophobic nano coating 2 is used to inhibit the adsorption and initial penetration of electrolyte;Corrosion resistant layer 3 is used to enhance the corrosion resistance of electrolyte;Reinforcing layer 4 is used to prevent adhesive tape body 1 from being damaged;Buffer transition layer 5 is used to further prevent adhesive tape body 1 from being damaged;Adhesive layer 6 is used to be bonded in use environment.
[0034] The utility model provides a kind of electrolyte corrosion-resistant adhesive tape, electrolyte is difficult to adhere and permeate on its surface by the extremely low surface energy of hydrophobic nano coating 2. Break through the electrolyte of hydrophobic coating by corrosion resistance layer 3, further block, improve the tolerance of adhesive tape to electrolyte, ensure long-term stable work in the complex electrolyte environment of lithium battery. By reinforcing layer 4, the overall tensile strength is effectively enhanced, so that adhesive tape body 1 is not prone to breakage and deformation problem when bearing the pulling, extrusion in the process of lithium battery assembly and various mechanical stresses in the process of use, guarantee the structural integrity of adhesive tape under various working conditions. By buffer transition layer 5, when battery expands and shrinks due to charging and discharging, or is impacted externally, the layer can effectively absorb and disperse stress, avoid damage to adhesive tape and battery assembly due to stress concentration, prolong the service life of adhesive tape and battery.
[0035] Preferably, hydrophobic nano coating 2, corrosion resistance layer 3, reinforcing layer 4, buffer transition layer 5 and adhesive layer 6 can be connected by coating and hot pressing.
[0036] Preferably, hydrophobic nano coating 2 is composed of fluorosilane modified silicon dioxide nanoparticles, and hydrophobic nano coating 2 is used to increase the contact angle with electrolyte. Preferably, hydrophobic nano coating 2 has protruding blocks 7 attached to its surface, and a plurality of protruding blocks 7 are uniformly distributed on the surface of hydrophobic nano coating 2. By using fluorosilane modified silicon dioxide nanoparticles, a nanoscale rough structure is constructed on the outermost layer of the adhesive tape by sol-gel method. The fluorine atoms in the fluorosilane molecules can reduce the surface free energy of the coating by virtue of their electronegativity and atomic structure, making it difficult for electrolyte molecules to adsorb; the silicon dioxide nanoparticles construct nanoscale protrusions on the surface of the coating, changing the interface geometry between the electrolyte and the coating and increasing the contact angle. Moreover, the structure of the protruding blocks 7 makes it difficult for electrolyte to adhere to the surface of the coating, greatly reducing the contact area between the electrolyte and the adhesive tape and effectively inhibiting the adsorption and initial penetration of the electrolyte.
[0037] Preferably, corrosion resistance layer 3 can use polyvinylidene fluoride as the matrix, add electrolyte-resistant additives such as phosphorus-containing flame retardants and antioxidant compounds, and then prepare a polymer layer with microporous structure, i.e. corrosion resistance layer 3, by phase separation method. The microporous structure is uniformly distributed in the polymer matrix, forming a tortuous penetration path. When electrolyte breaks through the superhydrophobic nano coating 2, it will undergo multiple refraction and diffusion in these micropores, prolonging the penetration time. At the same time, the chemical stability of polyvinylidene fluoride and the synergistic effect of the additives can further enhance the corrosion resistance of the electrolyte.
[0038] Preferably, the reinforcing layer 4 is composed of fibers and thermoplastic polyurethane, which mainly functions to further enhance the protective force of the protective tape body 1. In some embodiments, the reinforcing layer 4 can use fibers such as Kevlar fibers in aramid fibers. Aramid fibers have high tensile strength and modulus, which can effectively enhance the overall mechanical properties of the tape. Thermoplastic polyurethane can provide good flexibility and adhesion to other layers. In terms of manufacturing process, molding or extrusion molding can be used to tightly combine fibers and thermoplastic polyurethane to form a structure that is both strong and flexible. This structure can effectively disperse stress concentration caused by electrolyte corrosion, thermal expansion and contraction during battery charging and discharging, and external mechanical stress, thereby preventing the tape from cracking or delaminating. Since the cost of aramid fibers is higher than that of ordinary fibers, glass fibers and polyester fibers can be used as substitutes, and the proportion can be adjusted by the enterprise according to actual conditions.
[0039] Preferably, the buffer transition layer 5 uses silicone gel, which is used to further improve the buffering force. In some embodiments, the buffer transition layer 5 can use a temperature-sensitive silicone gel, which mainly includes polydimethylsiloxane, crosslinking agent and temperature-sensitive polymer. At room temperature, the silicone gel has good flexibility and buffering performance, and when the battery operating temperature rises, the conformation change of the temperature-sensitive polymer will cause the modulus of the gel to change to some extent, further optimizing the buffering force. In some embodiments, a suitable amount of nano-sized titanium dioxide particles can also be added to the gel, which not only enhances the mechanical properties of the gel, but also uses the photocatalytic properties of titanium dioxide to decompose harmful substances that may have penetrated into the electrolyte, providing additional protection.
[0040] Preferably, the adhesive layer 6 is composed of epoxy resin and tackifying resin, which is used to improve the adhesive force. While ensuring firm adhesion to the battery assembly, it can also effectively resist electrolyte corrosion and prevent the adhesive from failing. In some embodiments, the adhesive layer 6 can use an acrylic adhesive, which can tightly bind to the surface groups of the battery assembly through the ester bonds in the molecular chain, providing good adhesion to metals, plastics and other materials. Not only is it resistant to common electrolyte organic solvents, but it can also optimize flexibility by adjusting the monomer ratio to meet the thermal expansion and contraction requirements of the battery assembly.
[0041] As shown in Figures 2-4 The electrolyte-resistant corrosion tape also includes a rubber roller 8, and the tape body 1 is wound around the outer surface of the rubber roller 8. The rubber roller 8 is used to wind and collect the tape body 1.
[0042] The electrolyte-resistant corrosion tape also includes a collection housing 9, which has compartments 10. The rubber roller 8 is arranged in the plurality of compartments 10.
[0043] Specifically, the outer surface of the compartment 10 is provided with a seal 11, the seal 11 is provided with a baffle 12, the seal 11 is used to place the tape body 1, and the baffle 12 is used to seal the seal 11. When not in use, the baffle 12 can be closed to store the tape body 1.
[0044] The tape body 1 placed in each compartment 10 can be of different specifications, such as width, thickness, etc., or have different functions, such as adding different additives to adapt to different electrolyte types. This structure facilitates the classification management and use of the tape. In the production process of lithium batteries, different process requirements or electrolyte types may be encountered, and different compartments 10 can conveniently provide corresponding tapes to improve the flexibility of production. Independent compartments 10 can prevent different types of tapes from interfering with each other and ensure the performance and quality of the tapes.
[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 discloses the above 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 scope of the present application, and any equivalent embodiment with equivalent changes is equivalent to the above embodiment. Any simple modification, equivalent change and modification of the above embodiment within the scope of the present application are within the scope of the present application.
Claims
1. An electrolyte-resistant adhesive tape, characterized by comprising: The utility model relates to a kind of waterproof adhesive tape, including: The adhesive tape body is composed of hydrophobic nano coating, corrosion-resistant layer, reinforcing layer, buffer transition layer and adhesive layer connected in turn; The hydrophobic nano coating is used to inhibit the adsorption and initial penetration of electrolyte; The corrosion-resistant layer is used to enhance the corrosion resistance to electrolyte; The reinforcing layer is used to prevent the adhesive tape body from being damaged; The buffer transition layer is used to further prevent the adhesive tape body from being damaged; The adhesive layer is used to be bonded in use environment.
2. The electrolyte-resistant adhesive tape according to claim 1, wherein The surface of the hydrophobic nano coating is attached with protruding blocks, and the protruding blocks are uniformly distributed on the surface of the hydrophobic nano coating.
3. The electrolyte-resistant adhesive tape according to claim 1 or 2, characterized in that, The corrosion-resistant layer is composed of microporous structure, and the microporous corrosion-resistant layer is used to prolong the penetration time.
4. The electrolyte-resistant adhesive tape according to claim 1 or 2, characterized in that, It also includes a rubber roller, and the adhesive tape body is wound on the outer surface of the rubber roller, and the rubber roller is used to wind and collect the adhesive tape body.
5. The electrolyte-resistant adhesive tape according to claim 4, wherein It also includes a collection housing, and the collection housing is provided with compartments, and the compartments are provided with a plurality of rubber rollers.
6. The electrolyte-resistant adhesive tape according to claim 5, wherein The outer surface of the compartment is provided with a seal, and the seal is provided with a baffle, and the seal is used to place the adhesive tape body, and the baffle is used to seal the seal.
7. The electrolyte-resistant adhesive tape according to claim 1 or 2 or 5 or 6, wherein The buffer transition layer is made of silicone gel, and the buffer transition layer is used to further improve the buffering force.
8. The electrolyte-resistant adhesive tape according to claim 1 or 2 or 5 or 6, wherein The hydrophobic nano coating is composed of fluorosilane modified silicon dioxide nanoparticles, and the hydrophobic nano coating is used to increase the contact angle with electrolyte.