Method for coating two-component organic silicon on surface layer of new energy battery

Abstract

The invention discloses a method for coating a surface layer of a new energy battery with two-component organic silicon. The method comprises the following steps: step S1, sufficiently mixing a component A and a component B of the two-component organic silicon in proportion; s2, cleaning the surface layer of the new energy battery; and S3, coating the surface layer of the new energy battery with the fully mixed two-component organic silicon in a spraying or 3D printing manner. The surface layer of the new energy battery is coated with a layer of double-component organic silicon to replace a blue film wrapping the surface layer of the new energy battery, so that the complexity and difficulty in the packaging process are reduced, the packaging efficiency and the flexibility of a production line are improved, the packaging of a liquid cooling plate of a downstream assembly factory is facilitated, and constant-temperature imbalance of a single new energy battery can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a method for coating a surface layer of a new energy battery with two-component organic silicon. Background Art

[0002] New energy batteries are very sensitive to temperature and must be used normally within the appropriate temperature range. Therefore, when new energy batteries are used in electric vehicles, they are generally used with liquid cooling plates to keep the new energy batteries at a constant temperature during use, thereby maximizing the performance of new energy batteries. A liquid cooling plate refers to a structural component in a power battery system that can transfer excess heat generated by the battery through contact with the battery or module, and finally carry it away by the coolant passing through the internal flow channel of the liquid cooling plate. Cylindrical battery cells are generally cooled by side cooling, and the liquid cooling plate is fitted with the side portion of the battery cell cylinder, and coolant is passed into the liquid cooling plate to cool the battery cell.

[0003] During the production process, new energy batteries usually need to be wrapped with a layer of blue film on their surface. Blue film, also known as isolation film, anti-adhesion film or protective film, has excellent insulation properties. During the production process of batteries, the main function of the blue film is to separate the cells from each other. It can not only effectively block the impact of a single cell failure (such as short circuit, overheating, etc.) on other cells, but also protect the cells from physical damage such as scratches and collisions during battery transportation, assembly and use. At the same time, the blue film can also prevent direct contact between cells, reduce surface wear of the cells caused by friction or extrusion, and extend the service life of the battery.

[0004] Although wrapping a layer of blue film on the surface of new energy batteries brings many advantages, the presence of the blue film also increases the difficulty of packaging between the liquid cooling plate and the battery cell. Due to the certain thickness and material characteristics of the blue film, additional process steps are required to ensure that the liquid cooling plate can fit tightly and evenly on the battery cell, which not only increases the complexity of the production line, but also reduces the packaging efficiency, thereby increasing production costs. Summary of the invention

[0005] In order to overcome the problem that wrapping a layer of blue film on the surface of new energy batteries in the prior art increases the difficulty of packaging between liquid cooling plates and battery cells, the present invention provides a two-component silicone coating method for the surface of new energy batteries, which replaces the blue film wrapped on the surface of new energy batteries with two-component silicone, reduces the complexity and difficulty of the packaging process, improves the packaging efficiency and the flexibility of the production line, facilitates the packaging of liquid cooling plates in downstream assembly plants, and can prevent constant temperature disorders of single new energy batteries.

[0006] The technical solution of the present invention is as follows:

[0007] A two-component silicone coating method for the surface of a new energy battery comprises the following steps:

[0008] Step S1, fully mixing component A and component B of the two-component silicone in proportion;

[0009] Step S2, cleaning the surface of the new energy battery;

[0010] Step S3: coating the fully mixed two-component silicone on the surface of the new energy battery by spraying or 3D printing.

[0011] As a preferred embodiment of the present invention, it also includes:

[0012] Step S4, placing the coated new energy battery in a curing chamber, and setting a suitable temperature and time for curing according to the curing characteristics of the two-component silicone;

[0013] Step S5: Perform appearance inspection and performance test on the cured coating.

[0014] As a preferred embodiment of the present invention, the specific step of coating the fully mixed two-component silicone on the surface of the new energy battery by spraying includes:

[0015] Step A1, pouring the fully mixed two-component silicone into a storage tank of a spraying device;

[0016] Step A2, adjusting the pressure, flow rate, spraying distance and spraying angle of the spray gun of the spraying equipment according to the characteristics of the two-component silicone and the required coating thickness;

[0017] Step A3, aiming the spray head of the spraying equipment at the surface of the new energy battery, maintaining a proper spraying distance and angle;

[0018] Step A4: start the spraying equipment, and the nozzle of the spraying equipment sprays the surface of the new energy battery at a uniform speed and path.

[0019] As a preferred solution of the present invention, the specific steps of coating the fully mixed two-component silicone on the surface of the new energy battery by 3D printing include:

[0020] Step B1, transferring the fully mixed two-component silicone to a feeding system of a 3D printer;

[0021] Step B2, placing the new energy battery on the printing platform of the 3D printer;

[0022] Step B3, loading and calibrating the 3D printing model to ensure that the printing path matches the shape and size of the new energy battery;

[0023] Step B4, starting the 3D printer, and the print head of the 3D printer prints according to the preset path and parameters; during the printing process, the two-component silicone will be coated on the surface of the new energy battery through the print head of the 3D printer.

[0024] As a preferred embodiment of the present invention, the raw materials of component A include: methyl vinyl silicone rubber, high molecular polymer, foaming agent, cross-linking agent, catalyst and flame retardant powder;

[0025] The raw materials of component B include: isocyanate, hydrogen-containing silicone oil and curing agent.

[0026] As a preferred embodiment of the present invention, the mass percentage ratio of each raw material in the component A is:

[0027] Methyl vinyl silicone rubber: 20-40%;

[0028] High molecular weight polymer: 10-20%;

[0029] Foaming agent: 15-30%;

[0030] Cross-linking agent: 5-10%;

[0031] Catalyst: 5-10%;

[0032] Flame retardant powder: 20~40%.

[0033] As a preferred embodiment of the present invention, the mass percentage ratio of each raw material in the B component is:

[0034] Isocyanate: 50-70%;

[0035] Hydrogenated silicone oil: 20-40%;

[0036] Curing agent: 10~30%.

[0037] As a preferred embodiment of the present invention, the mass ratio of the component A to the component B is 1:1.

[0038] As a preferred embodiment of the present invention, the preparation method of component A comprises:

[0039] The methyl vinyl silicone rubber and the high molecular polymer are put into a reactor according to a ratio for premixing. After premixing for 5 to 8 hours, the flame retardant powder, the foaming agent, the catalyst and the crosslinking agent are added in sequence according to the components and mixed for 1 to 2 hours. The rotation speed of the reactor is 100 to 120 r / min. After the premixing, the rotation speed of the reactor is 160 to 190 r / min.

[0040] As a preferred embodiment of the present invention, the preparation method of component B comprises:

[0041] The isocyanate, the cross-linking agent and the curing agent are placed in a reaction kettle according to a ratio and mixed for 2 to 4 hours. The rotation speed of the reaction kettle is 200 to 230 r / min.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The two-component silicone coating method for the surface of a new energy battery provided by the present invention reduces the complexity and difficulty of the packaging process, improves the packaging efficiency and the flexibility of the production line, facilitates the packaging of the liquid cooling plate of the downstream assembly plant, and can prevent the constant temperature disorder of a single new energy battery; reduces the production cost by reducing the process steps and the use of materials; at the same time, the two-component silicone has the advantages of high and low temperature resistance, electrical insulation, oxidation stability, weather resistance, high flame retardancy, waterproofness, corrosion resistance, non-toxicity and environmental protection, can effectively protect the new energy battery from the external environment, improve the stability and safety of the new energy battery, and also reduce the subsequent maintenance and replacement costs; the coating method is applicable to various types of new energy batteries and has high versatility and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is a flow chart of the steps of a two-component organic silicon coating method for a new energy battery surface in one embodiment of the present invention;

[0046] Figure 2 This is a flow chart of the steps of a two-component silicone coating method for a new energy battery surface in another embodiment of the present invention;

[0047] Figure 3This is a flowchart of the specific steps of coating the fully mixed two-component silicone on the surface of a new energy battery by spraying in one embodiment of the present invention;

[0048] Figure 4 The present invention is a flowchart of the specific steps of coating the fully mixed two-component silicone on the surface of a new energy battery by 3D printing in one embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0050] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0051] See also Figure 1 This embodiment provides a two-component silicone coating method for a new energy battery surface, comprising the following steps:

[0052] Step S1, fully mix component A and component B of the two-component silicone in proportion, wherein the mass ratio of component A to component B is 1:1.

[0053] Step S2: clean the surface of the new energy battery to remove impurities such as oil, dust, etc., to ensure that the coating surface is clean and smooth, which is conducive to the adhesion of the two-component silicone; if necessary, use a clean cloth or a special wiper to wipe the surface of the new energy battery for the final time.

[0054] Step S3: coating the fully mixed two-component silicone on the surface of the new energy battery by spraying or 3D printing.

[0055] The two-component silicone coating method for the surface of a new energy battery provided by the present invention reduces the complexity and difficulty of the packaging process, improves the packaging efficiency and the flexibility of the production line, facilitates the packaging of the liquid cooling plate of the downstream assembly plant, and can prevent the constant temperature disorder of a single new energy battery; reduces the production cost by reducing the process steps and the use of materials; at the same time, the two-component silicone has the advantages of high and low temperature resistance, electrical insulation, oxidation stability, weather resistance, high flame retardancy, waterproofness, corrosion resistance, non-toxicity and environmental protection, can effectively protect the new energy battery from the external environment, improve the stability and safety of the new energy battery, and also reduce the subsequent maintenance and replacement costs; the coating method is applicable to various types of new energy batteries and has high versatility and applicability.

[0056] See also Figure 2 In one embodiment, the two-component silicone coating method for the surface of a new energy battery further comprises:

[0057] Step S4, placing the coated new energy battery in a curing chamber, setting the appropriate temperature and time for curing according to the curing characteristics of the two-component silicone. During the curing process, components A and B in the two-component silicone react chemically in the air to form a coating with high and low temperature resistance, electrical insulation, oxidation stability, weather resistance, high flame retardancy, waterproof, corrosion resistance, non-toxic and environmentally friendly, which can effectively protect the new energy battery. By controlling the temperature and time of the curing chamber, this chemical reaction process can be accelerated and optimized. The cured coating provides a solid foundation for subsequent performance testing and assembly steps. Only fully cured coatings can pass strict performance tests and meet the requirements of downstream assembly plants.

[0058] Step S5: Perform an appearance inspection on the cured coating to ensure that the coating is uniform, free of cracks, bubbles and other defects, and conduct performance tests, such as high and low temperature resistance test, electrical insulation test, weather resistance test, etc., to verify whether the performance of the coating meets the requirements. If any quality problems are found in the coating, timely adjustments should be made, such as adjusting the parameters of spraying or 3D printing, re-cleaning the surface, etc., and re-spraying.

[0059] See also Figure 3 In one embodiment, the specific steps of coating the fully mixed two-component silicone on the surface of the new energy battery by spraying include:

[0060] Step A1: Pour the fully mixed two-component silicone into the storage tank of the spray equipment, and ensure that there are no bubbles or impurities to avoid these adverse factors affecting the formation and performance of the coating during the printing process. Then use a stirrer or the stirring function of the equipment to stir the two-component silicone again to ensure the uniformity of the coating.

[0061] Step A2: According to the characteristics of the two-component silicone and the required coating thickness, adjust the pressure, flow rate, spraying distance and spraying angle of the spray gun of the spraying equipment.

[0062] Step A3: Aim the nozzle of the spraying equipment at the surface of the new energy battery and maintain an appropriate spraying distance and angle.

[0063] Step A4, start the spraying equipment, and the nozzle of the spraying equipment sprays the surface of the new energy battery at a uniform speed and path to ensure that the coating thickness is consistent, without missing or re-coating. In addition, it is necessary to pay attention to controlling the ambient humidity, temperature and wind speed during the spraying process to avoid adverse effects on the coating quality.

[0064] Through the above-mentioned steps A1 to A4, it can be ensured that the two-component silicone is evenly and efficiently coated on the surface of the new energy battery by spraying.

[0065] See also Figure 4 In one embodiment, the specific steps of coating the fully mixed two-component silicone on the surface of the new energy battery by 3D printing include:

[0066] Step B1, transfer the fully mixed two-component silicone to the feeding system of the 3D printer to ensure that there are no bubbles and impurities, so as to avoid these adverse factors affecting the formation and performance of the coating during the printing process. Placing the coating in the feeding system can ensure that the coating can be continuously and stably supplied to the print head during the printing process, avoiding printing failures caused by insufficient or interrupted feeding.

[0067] Step B2: Place the new energy battery on the printing platform of the 3D printer and fix it appropriately to prevent printing deviation caused by movement or shaking of the battery during the printing process, thereby ensuring the precision and accuracy of the printing.

[0068] Step B3: Load and calibrate the 3D printing model to ensure that the printing path matches the shape and size of the new energy battery to avoid uneven or missing coating due to path deviation.

[0069] Step B4, start the 3D printer, and the print head of the 3D printer prints according to the preset path and parameters; during the printing process, the two-component silicone will be accurately coated on the surface of the new energy battery through the print head of the 3D printer. In addition, the ambient temperature, humidity and ventilation conditions should be strictly controlled throughout the process to ensure the quality and performance of the coating.

[0070] Through the above steps B1 to B4, it can be ensured that the two-component silicone is evenly, continuously and accurately coated on the surface of the new energy battery by 3D printing. Compared with the spraying method, although the 3D printing method is less efficient, the material loss is very low and the applicability is relatively high. In the spraying method, part of the paint often splashes or does not adhere to the battery surface during the coating process, resulting in material waste; while the 3D printing method can accurately control the amount of paint and the coating position to reduce material loss. The 3D printing method can adapt to new energy batteries of different shapes, sizes and materials, and has high versatility and flexibility; while the spraying method may require more adjustments and optimizations when adapting to different shapes and materials.

[0071] In one embodiment, the raw materials of component A include: methyl vinyl silicone rubber, high molecular polymer, foaming agent, cross-linking agent, catalyst and flame retardant powder.

[0072] The mass percentage ratio of each raw material in component A is:

[0073] Methyl vinyl silicone rubber: 20-40%;

[0074] High molecular weight polymer: 10-20%;

[0075] Foaming agent: 15-30%;

[0076] Cross-linking agent: 5-10%;

[0077] Catalyst: 5-10%;

[0078] Flame retardant powder: 20~40%.

[0079] Methyl vinyl silicone rubber is the basic elastomer material in component A, providing good elasticity and toughness for the entire silicone system. Methyl vinyl silicone rubber has good high temperature resistance and can maintain stable physical and chemical properties under high temperature environment. Methyl vinyl silicone rubber also has good weather resistance and has good resistance to environmental factors such as ultraviolet rays and ozone, which can extend the service life of silicone.

[0080] The high molecular polymer is polyurethane. Polyurethane is a new type of high molecular synthetic material between rubber and plastic. It combines the high strength of plastic and the high elasticity of rubber, and has the characteristics of high hardness and high resilience. The present invention adds polyurethane to component A in a certain proportion, and adjusts the amount of foaming agent, cross-linking agent and catalyst to ensure good compatibility with the newly added polyurethane and maintain appropriate foaming and cross-linking speeds, thereby improving the elasticity and shock absorption performance of the tube-filled liquid two-component filling silicone rubber to meet higher requirements for sealing and shock absorption applications.

[0081] The foaming agent can produce bubbles during the curing process of silicone, thereby adjusting the density and hardness of silicone. An appropriate amount of foaming agent can improve the processing properties of silicone, making it easier to shape and process.

[0082] The cross-linking agent is used to promote the chemical reaction of the foaming agent to produce more gas, thereby increasing the volume and stability of the filled silicone, and can also enhance the temperature resistance and mechanical strength of the filled silicone.

[0083] The catalyst can accelerate the curing reaction between component A and component B, shorten the molding time and the complete curing time, and shorten the curing time helps to improve production efficiency and reduce production costs.

[0084] The addition of flame retardant powder can significantly improve the fire resistance level of silica gel, reduce the risk of fire, and inhibit the spread of flames during combustion, buying time for escape and fire fighting. Some flame retardant powders such as aluminum hydroxide and magnesium hydroxide are environmentally friendly and meet environmental protection requirements. Flame retardant powder is a mixture of one or at least two of aluminum hydroxide, magnesium hydroxide, decabromodiphenyl ether and antimony oxide.

[0085] The raw materials of component B include: isocyanate, hydrogen-containing silicone oil and curing agent.

[0086] The mass percentage ratio of each raw material in component B is:

[0087] Isocyanate: 50-70%;

[0088] Hydrogenated silicone oil: 20-40%;

[0089] Curing agent: 10~30%.

[0090] Isocyanate is the main crosslinking agent in component B, which can react chemically with the silicone rubber in component A to form a crosslinked network structure. The formation of the crosslinked network can significantly enhance the mechanical properties and heat resistance of the silicone. Among them, the isocyanate is one or a mixture of at least two of toluene diisocyanate, pure MDI, carbodiimide modified MDI, MDI-50 and polymerized MDI I.

[0091] Hydrogenated silicone oil can adjust the curing speed of silicone, making it more controllable, and can improve the fluidity of silicone, making it easier to mix and shape.

[0092] The curing agent is a platinum catalyst. Platinum catalysts have high catalytic activity and can efficiently promote cross-linking reactions between silicone polymers. The silicon-oxygen bonds formed by platinum catalysts are very stable, which helps to improve the temperature resistance, chemical resistance and weather resistance of the final product. Compared with other types of catalysts, platinum catalysts have lower toxicity, which makes them very useful in industries that need to meet strict safety and health standards. Platinum catalysts have less effect on the color and odor of the cured product, which is especially important for products that require transparency or specific color requirements. Platinum catalysts can improve the mechanical properties of silicone, such as hardness and elasticity, while maintaining the flexibility of the material.

[0093] Among them, the preparation method of component A is: put methyl vinyl silicone rubber and high molecular polymer into a reactor according to the ratio for premixing, and after premixing for 5 to 8 hours, add flame retardant powder, foaming agent, catalyst and crosslinking agent in sequence according to the components and mix for 1 to 2 hours. The speed of the reactor is 100 to 120 r / min. After the premixing is completed, the speed of the reactor is 160 to 190 r / min.

[0094] The preparation method of component B is as follows: isocyanate, crosslinking agent and curing agent are put into a reaction kettle according to a ratio and mixed for 2 to 4 hours, and the rotation speed of the reaction kettle is 200 to 230 r / min.

[0095] The performance of the two-component silicone of the above embodiment of the present invention was tested, and the results are shown in Table 1 below.

[0096] Project Name Two-component silicone Curing time (min) 9 High and low temperature performance (-40℃-150℃) No change Electrical insulation performance (Ω·cm) >10^14 Oxidative stability (performance changes after aging No significant changes Weathering resistance (performance changes after one year of exposure) No significant changes Flame retardant grade (UL-94 standard) V-0 Waterproof performance (water absorption after immersion for 24 hours) 0.1％ Corrosion resistance (corrosion degree to copper, aluminum and steel) No corrosion

[0097] It can be seen from the above table that the two-component silicone in the embodiment of the present invention has a short curing time, which effectively improves the spraying efficiency. Moreover, due to its advantages of high and low temperature resistance, electrical insulation, oxidation stability, weather resistance, high flame retardancy, waterproofness, and corrosion resistance, it can effectively protect new energy batteries from the external environment, improve the stability and safety of new energy batteries, and reduce subsequent maintenance and replacement costs.

[0098] In another embodiment, the high molecular polymer is a TPU prepolymer. TPU prepolymer is a non-toxic and environmentally friendly high molecular polymer with the characteristics of a wide hardness range, high mechanical strength, outstanding impact resistance and shock absorption performance, and also exhibits excellent electrical insulation, high and low temperature resistance, oxidation stability, weather resistance, corrosion resistance and other properties. The present invention adds TPU prepolymer to component A in a certain proportion, and adjusts the amount of foaming agent, cross-linking agent and catalyst to ensure good compatibility with the newly added TPU prepolymer and maintain appropriate foaming and cross-linking speeds, which can not only improve the elasticity and shock absorption performance of the tube-filled liquid two-component filling silicone, but also improve the product's electrical insulation, high and low temperature resistance, oxidation stability, weather resistance, corrosion resistance, and maintain the product's environmental characteristics.

[0099] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0100] The above is an exemplary description of the present invention. Obviously, the implementation of the present invention is not limited to the above method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

[0101] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0102] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A two-component silicone coating method for the surface of a new energy battery, characterized in that: The following steps are involved: Step S1, fully mixing component A and component B of the two-component silicone in proportion; Step S2, cleaning the surface of the new energy battery; Step S3: coating the fully mixed two-component silicone on the surface of the new energy battery by spraying or 3D printing.

2. The two-component silicone coating method for the surface of a new energy battery according to claim 1, characterized in that: Also includes: Step S4, placing the coated new energy battery in a curing chamber, and setting a suitable temperature and time for curing according to the curing characteristics of the two-component silicone; Step S5: Perform appearance inspection and performance test on the cured coating.

3. The two-component silicone coating method for the surface of a new energy battery according to claim 1, characterized in that: The specific step of coating the fully mixed two-component silicone on the surface of the new energy battery by spraying includes: Step A1, pouring the fully mixed two-component silicone into a storage tank of a spraying device; Step A2, adjusting the pressure, flow rate, spraying distance and spraying angle of the spray gun of the spraying equipment according to the characteristics of the two-component silicone and the required coating thickness; Step A3, aiming the spray head of the spraying equipment at the surface of the new energy battery, maintaining a proper spraying distance and angle; Step A4: start the spraying equipment, and the nozzle of the spraying equipment sprays the surface of the new energy battery at a uniform speed and path.

4. The two-component silicone coating method for the surface of a new energy battery according to claim 1, characterized in that: The specific steps of coating the fully mixed two-component silicone on the surface of the new energy battery by 3D printing include: Step B1, transferring the fully mixed two-component silicone to a feeding system of a 3D printer; Step B2, placing the new energy battery on the printing platform of the 3D printer; Step B3, loading and calibrating the 3D printing model to ensure that the printing path matches the shape and size of the new energy battery; Step B4, starting the 3D printer, and the print head of the 3D printer prints according to the preset path and parameters; during the printing process, the two-component silicone will be coated on the surface of the new energy battery through the print head of the 3D printer.

5. The two-component silicone coating method for the surface of a new energy battery according to claim 1, characterized in that: The raw materials of component A include: methyl vinyl silicone rubber, high molecular polymer, foaming agent, cross-linking agent, catalyst and flame retardant powder; The raw materials of component B include: isocyanate, hydrogen-containing silicone oil and curing agent.

6. The method for coating the surface of a new energy battery with two-component organic silicon according to claim 5, characterized in that: The mass percentage ratio of each raw material in the A component is: Methyl vinyl silicone rubber: 20-40%; High molecular weight polymer: 10-20%; Foaming agent: 15-30%; Cross-linking agent: 5-10%; Catalyst: 5-10%; Flame retardant powder: 20~40%.

7. The method for coating the surface of a new energy battery with two-component organic silicon according to claim 5, characterized in that: The mass percentage ratio of each raw material in the B component is: Isocyanate: 50-70%; Hydrogenated silicone oil: 20-40%; Curing agent: 10~30%.

8. The method for coating the surface of a new energy battery with two-component organic silicon according to claim 5, characterized in that: The mass ratio of the component A to the component B is 1:

1.

9. The method for coating the surface of a new energy battery with two-component organic silicon according to claim 5, characterized in that: The preparation method of component A comprises: The methyl vinyl silicone rubber and the high molecular polymer are put into a reactor according to a ratio for premixing. After premixing for 5 to 8 hours, the flame retardant powder, the foaming agent, the catalyst and the crosslinking agent are added in sequence according to the components and mixed for 1 to 2 hours. The rotation speed of the reactor is 100 to 120 r / min. After the premixing, the rotation speed of the reactor is 160 to 190 r / min.

10. The method for coating the surface of a new energy battery with two-component organic silicon according to claim 5, characterized in that: The preparation method of the component B comprises: The isocyanate, the cross-linking agent and the curing agent are placed in a reaction kettle according to a ratio and mixed for 2 to 4 hours. The rotation speed of the reaction kettle is 200 to 230 r / min.

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