New energy battery flame-retardant wrapping film

Abstract

The utility model belongs to the technical field of battery flame-retardant wrapping films, and particularly relates to a new energy battery flame-retardant wrapping film which comprises an antistatic coating, a PI (polyimide) film layer is fixedly connected to the bottom of the antistatic coating, and a nano ceramic coating is fixedly connected to the bottom of the PI film layer. The bottom of the nano ceramic coating is fixedly connected with an organic silicon pressure-sensitive adhesive layer, the bottom of the organic silicon pressure-sensitive adhesive layer is fixedly connected with a polymer liquid absorption layer, the bottom of the polymer liquid absorption layer is fixedly connected with a PET release film layer, and the bottom of the PET release film layer is fixedly connected with a degradable environment-friendly layer. And the degradable environment-friendly layer is used, so that the wrapping film can be naturally degraded after the battery is scrapped, and the pollution to the environment is reduced. Compared with a traditional non-degradable material, the environment-friendly design better meets the requirement of the modern society for sustainable development, and green development of the new energy battery industry is promoted.

Description

Technical Field

[0001] This utility model relates to the field of flame-retardant wrapping film technology for batteries, specifically a flame-retardant wrapping film for new energy batteries. Background Technology

[0002] With the rapid development of new energy vehicles, electric vehicles, and portable electronic devices, the demand for high-performance and highly safe new energy batteries is increasing. However, in recent years, safety issues with new energy batteries have occurred frequently, especially fires caused by battery thermal runaway, resulting in huge property losses and casualties. Therefore, the safety protection of new energy batteries is particularly important.

[0003] Existing protective film materials used for wrapping new energy batteries are mostly composed of ordinary polymer materials, which have many defects. First, these materials have very low breakdown voltage, which can easily cause chip burnout during battery use and affect the normal operation of the battery. Second, their flame retardancy is poor, and they release toxic gases when burning; some even fail to self-extinguish when the flame is removed, resulting in poor safety performance. In addition, these materials cannot effectively absorb electrolyte when the battery is impacted or damaged, leading to electrolyte leakage and further increasing the risk of fire and corrosion.

[0004] Therefore, a flame-retardant coating film for new energy batteries is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this paper addresses the problem that while existing laser paper has a protective layer, the laser layer is easily eroded during prolonged washing or in high humidity environments, leading to a weakening or even disappearance of the laser effect. Furthermore, during the printing process, the ink adhesion on the washable laser paper is not ideal, easily resulting in problems such as color fading and ink stripping, which affect printing quality and product appearance.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The flame-retardant wrapping film for new energy batteries of this utility model includes an antistatic coating, a PI film layer fixedly connected to the bottom of the antistatic coating, a nano-ceramic coating fixedly connected to the bottom of the PI film layer, an organosilicon pressure-sensitive adhesive layer fixedly connected to the bottom of the nano-ceramic coating, a polymer liquid-absorbing layer fixedly connected to the bottom of the organosilicon pressure-sensitive adhesive layer, a PET release film layer fixedly connected to the bottom of the polymer liquid-absorbing layer, and a biodegradable environmentally friendly layer fixedly connected to the bottom of the PET release film layer.

[0007] Preferably, the antistatic coating is made of a composite material of reduced graphene oxide nanosheets and poly(3,4-dioxyethylthiophene), and the thickness of the antistatic coating is set to 0.08 μm to 0.5 μm.

[0008] Preferably, the antistatic coating and the PI film layer constitute a coating structure, and the thickness of the PI film layer is set to 10 μm to 180 μm.

[0009] Preferably, the PI thin film layer and the nano-ceramic coating form a coating structure, and the thickness of the nano-ceramic coating is set to 5 μm to 15 μm.

[0010] Preferably, the nano-ceramic coating and the organosilicon pressure-sensitive adhesive layer constitute a coating structure; and the thickness of the organosilicon pressure-sensitive adhesive layer is set to 3μm to 25μm.

[0011] Preferably, the silicone pressure-sensitive adhesive layer and the polymer liquid-absorbing layer form a composite structure, and the thickness of the polymer liquid-absorbing layer is set to 10μm to 30μm; the polymer liquid-absorbing layer and the PET release film layer form a laminated structure, and the thickness of the PET release film layer is set to 5μm to 50μm; the PET release film layer and the biodegradable environmentally friendly layer form a composite structure, and the thickness of the biodegradable environmentally friendly layer is set to 15μm to 40μm.

[0012] The advantages of this utility model are:

[0013] 1. This utility model features a structure in which the antistatic coating and the PI film layer, the PI film layer and the nano-ceramic coating, and the nano-ceramic coating and the silicone pressure-sensitive adhesive layer are all connected using a coating process. This coating process ensures that each layer is uniformly and tightly bonded together, forming a unified whole and enhancing the structural stability of the coating film. During battery use, even under certain external impacts or temperature changes, the layers will not delaminate or detach, ensuring the long-term stability and reliability of the coating film. The silicone pressure-sensitive adhesive layer and the polymer absorbent layer form a composite structure; the polymer absorbent layer and the PET release film layer form a laminated structure; and the PET release film layer and the biodegradable environmentally friendly layer form a composite structure. These connection methods further strengthen the bonding force between the layers, making the entire coating film a robust whole. During the battery's charge and discharge cycles, the coating film maintains excellent performance and its protective effect is not affected by factors such as battery expansion and contraction. Moreover, the layers complement each other, achieving comprehensive protection. An antistatic coating prevents accidents caused by static electricity; a PI film layer and a nano-ceramic coating provide excellent flame retardant and heat insulation properties; an organosilicon pressure-sensitive adhesive layer accelerates heat dissipation and enhances the adhesion of each layer; a polymer liquid-absorbing layer absorbs electrolyte to prevent leakage; a PET release film layer provides isolation and protection; and a biodegradable and environmentally friendly layer can naturally degrade after its function is complete. This multi-layered composite structure fully utilizes the advantages of each material and compensates for the shortcomings of a single material, providing new energy batteries with comprehensive and multi-layered protection from the outside in, from static electricity protection to flame retardant and heat insulation, from liquid absorption and leakage prevention to environmental degradation. This effectively reduces the risk of safety accidents during battery use. This flame-retardant wrapping film for new energy batteries has strong adaptability and can be applied to different types of new energy batteries, such as lithium-ion batteries and nickel-metal hydride batteries. Whether it is a square battery, a cylindrical battery, or a pouch battery, this wrapping film can tightly adhere to the battery surface, providing effective protection. Furthermore, its multi-layered composite structure and superior performance ensure stable protection under various operating conditions and environments, such as high temperature, high humidity, and vibration. This meets the high standards for battery safety protection required by new energy vehicles, portable electronic devices, and energy storage systems. The use of a biodegradable and environmentally friendly layer allows the coating to degrade naturally after the battery is disposed of, reducing environmental pollution. Compared to traditional non-degradable materials, this environmentally friendly design is more in line with modern society's requirements for sustainable development and helps promote the green development of the new energy battery industry. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the entire utility model from the front view;

[0016] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the overall frontal view of the opened structure of this utility model;

[0018] Figure 4 This is a cross-sectional view of the overall front view of this utility model.

[0019] In the diagram: 1. Antistatic coating; 2. PI film layer; 3. Nano-ceramic coating; 4. Organosilicon pressure-sensitive adhesive layer; 5. Polymer liquid-absorbing layer; 6. PET release film layer; 7. Biodegradable and environmentally friendly layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Example

[0021] like Figure 1 The flame-retardant coating film for new energy batteries shown includes an antistatic coating 1, a PI film layer 2, a nano-ceramic coating 3, an organosilicon pressure-sensitive adhesive layer 4, an organosilicon pressure-sensitive adhesive layer 5, a PET release film layer 6, and a biodegradable and environmentally friendly layer 7.

[0022] Please see Figures 1 to 4The image shows a flame-retardant coating for a new energy battery, comprising an antistatic coating 1, a PI film layer 2 fixedly connected to the bottom of the antistatic coating 1, a nano-ceramic coating 3 fixedly connected to the bottom of the PI film layer 2, an organosilicon pressure-sensitive adhesive layer 4 fixedly connected to the bottom of the nano-ceramic coating 3, a polymer liquid-absorbing layer 5 fixedly connected to the bottom of the organosilicon pressure-sensitive adhesive layer 4, a PET release film layer 6 fixedly connected to the bottom of the polymer liquid-absorbing layer 5, and a biodegradable environmentally friendly layer 7 fixedly connected to the bottom of the PET release film layer 6. The antistatic coating 1 is made of a composite material of reduced graphene oxide nanosheets and poly(3,4-dioxyethylthiophene), and the thickness of the antistatic coating 1 is set to 0.08 μm to 0.5 μm. The antistatic coating 1 and the PI film layer 2 constitute a coating structure. The thickness of the PI thin film layer 2 is set to 10 μm to 180 μm; and the PI thin film layer 2 and the nano-ceramic coating layer 3 form a coating structure, and the thickness of the nano-ceramic coating layer 3 is set to 5 μm to 15 μm; the nano-ceramic coating layer 3 and the silicone pressure-sensitive adhesive layer 4 form a coating structure, and the thickness of the silicone pressure-sensitive adhesive layer 4 is set to 3 μm to 25 μm; the silicone pressure-sensitive adhesive layer 4 and the polymer liquid-absorbing layer 5 form a composite structure, and the thickness of the polymer liquid-absorbing layer 5 is set to 10 μm to 30 μm; the polymer liquid-absorbing layer 5 and the PET release film layer 6 form a laminated structure, and the thickness of the PET release film layer 6 is set to 5 μm to 50 μm; the PET release film layer 6 and the biodegradable environmentally friendly layer 7 form a composite structure, and the thickness of the biodegradable environmentally friendly layer 7 is set to 15 μm to 40 μm.

[0023] Working Principle: In the overall structure of the flame-retardant coating film for new energy batteries, each layer is closely connected and works collaboratively to safeguard the safe and stable operation of the battery. The antistatic coating 1, as the direct contact layer between the coating film and the battery surface, rapidly conducts static electricity generated by the battery due to its unique material properties. This process not only protects the battery itself but also creates a favorable electrostatic environment for the stable operation of subsequent layers. It is tightly bonded to the PI film layer 2 through a coating structure, conducting static electricity while the PI film layer 2 provides reliable physical support for the antistatic coating 1, ensuring its stable antistatic effect under various operating conditions. While bearing the load of the antistatic coating 1, the PI film layer 2, with its excellent heat resistance, high strength, and chemical stability, constructs a robust basic framework for the entire coating film. Its coating connection with the nano-ceramic coating 3 allows the nano-ceramic coating 3 to stably adhere to the surface of the PI film layer 2 under high-temperature environments, jointly resisting heat attack. When the internal temperature of the battery rises abnormally, the nano-ceramic coating 3 absorbs heat and disperses it through lattice vibration, while the PI thin film layer 2 maintains the integrity of the overall structure, preventing deformation caused by high temperature. Together, they effectively block heat from spreading to other parts of the battery. The nano-ceramic coating 3 is connected to the silicone pressure-sensitive adhesive layer 4 through a coating structure. The silicone pressure-sensitive adhesive layer 4 not only firmly bonds the nano-ceramic coating 3 to the polymer absorbent layer 5, but also maintains good adhesion even when the nano-ceramic coating 3 deforms due to temperature changes, ensuring that the layers of the coating do not separate due to temperature fluctuations. The silicone pressure-sensitive adhesive layer 4 and the polymer absorbent layer 5 form a composite structure. When electrolyte leakage occurs inside the battery, the polymer absorbent layer 5 quickly exerts its absorbent capacity, firmly locking in the electrolyte. During this process, the stable adhesion of the silicone pressure-sensitive adhesive layer 4 ensures that the polymer absorbent layer 5 does not separate from other layers due to electrolyte immersion, continuously performing its absorbent protection function. The polymer absorbent layer 5 and the PET release film layer 6 are tightly connected through a lamination structure. During battery production, the PET release film layer 6 prevents the polymer absorbent layer 5 from sticking to production equipment or other components, ensuring smooth production. During battery use, the PET release film layer 6 is combined with the biodegradable environmentally friendly layer 7 through a composite structure. On the one hand, it maintains the stability of the internal structure of the wrapping film. On the other hand, when the battery is scrapped, the biodegradable environmentally friendly layer 7 begins to function, gradually decomposing in the natural environment, while the PET release film layer 6 maintains the relative integrity of each layer structure until the biodegradable environmentally friendly layer 7 is completely decomposed, thus fulfilling the environmental protection mission of the entire new energy battery wrapping film. From electrostatic protection during battery operation to heat insulation and flame retardancy at high temperatures, to electrolyte leakage protection and final environmental degradation, the various layers of the new energy battery flame-retardant wrapping film work closely together through different connection methods to comprehensively ensure the safety and environmental performance of the battery.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A new energy battery flame-retardant wrapping film, characterized in that: The application relates to an antistatic coating (1), the bottom of the antistatic coating (1) is fixedly connected with a PI film layer (2), the bottom of the PI film layer (2) is fixedly connected with a nano ceramic coating (3), the bottom of the nano ceramic coating (3) is fixedly connected with a silicone pressure-sensitive adhesive layer (4), the bottom of the silicone pressure-sensitive adhesive layer (4) is fixedly connected with a high-molecular liquid absorption layer (5), the bottom of the high-molecular liquid absorption layer (5) is fixedly connected with a PET release film layer (6), and the bottom of the PET release film layer (6) is fixedly connected with a degradable environment-friendly layer (7).

2. The new energy battery flame-retardant wrapping film according to claim 1, characterized in that: The antistatic coating (1) and the PI film layer (2) form a coating structure, and the thickness of the PI film layer (2) is 10-180 mu m.

3. The new energy battery flame-retardant wrapping film according to claim 1, characterized in that: The PI film layer (2) and the nano ceramic coating (3) form a coating structure, and the thickness of the nano ceramic coating (3) is 5-15 mu m.

4. The new energy battery flame-retardant wrapping film according to claim 1, characterized in that: The nano ceramic coating (3) and the silicone pressure-sensitive adhesive layer (4) form a coating structure, and the thickness of the silicone pressure-sensitive adhesive layer (4) is 3-25 mu m.

5. The new energy battery flame-retardant wrapping film according to claim 1, characterized in that: The silicone pressure-sensitive adhesive layer (4) and the high-molecular liquid absorption layer (5) form a composite structure, the thickness of the high-molecular liquid absorption layer (5) is 10-30 mu m, the high-molecular liquid absorption layer (5) and the PET release film layer (6) form a laminated structure, the thickness of the PET release film layer (6) is 5-50 mu m, the PET release film layer (6) and the degradable environment-friendly layer (7) form a composite structure, and the thickness of the degradable environment-friendly layer (7) is 15-40 mu m.

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