Battery-fluid-resistant fluorinated silicone rubber in-vehicle high-voltage cable sheath material

Abstract

The invention relates to the technical field of cable sheath materials, and discloses a battery-liquid-resistant fluorinated silicone rubber in-vehicle high-voltage cable sheath material, which is prepared from the following raw materials in parts by weight: 50 to 100 parts of fluorinated silicone rubber, 2 to 10 parts of fumed silica, 0.5 to 3 parts of aluminum silicate, 0.5 to 5 parts of active magnesium oxide, 0.5 to 1 part of microcrystalline wax, 0.5 to 5 parts of graphene powder and 0.1 to 2 parts of bis-2, 5 vulcanizing agent. By adopting a novel high-performance fluorinated silicone rubber material, an optimized formula system and an advanced manufacturing process, high stability, high safety and low cost of the high-voltage cable sheath material in long-term use are realized, the superiority and practicability of the high-voltage cable sheath material are proved through strict quality control and test, and the high-voltage cable sheath material has a wide application prospect. A new thought and a new direction are provided for research, development and application of an automobile high-voltage cable sheath material.

Description

Technical Field

[0001] This invention relates to the field of cable sheathing materials, and in particular to a battery-resistant fluorosilicone rubber high-voltage cable sheathing material for vehicles. Background Technology

[0002] Currently, the main materials used for automotive high-voltage cable sheathing in the market are XLPE (cross-linked polyethylene) and SR (silicone rubber). While XLPE offers good resistance to battery fluid corrosion, its poor flexibility makes it difficult to meet the flexibility requirements of automotive high-voltage cables, and its processing performance is limited. SR silicone, on the other hand, while possessing excellent flexibility, exhibits poor resistance to battery fluid in highly corrosive environments, leading to performance degradation over long-term use. With the rapid development of new energy vehicles, automotive high-voltage cables require a new material that is resistant to battery fluid corrosion, possesses high strength, high flexibility, and excellent processing performance to meet the complex wiring and high-voltage operation requirements of new energy vehicles. However, traditional materials struggle to meet these multiple performance requirements, and the market urgently needs a solution that combines high performance and cost-effectiveness. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles comprises the following raw materials in parts by weight: 50-100 parts fluorosilicone rubber, 2-10 parts fumed silica, 0.5-3 parts aluminum silicate, 0.5-5 parts activated magnesium oxide, 0.5-1 part microcrystalline wax, 0.5-5 parts graphene powder, and 0.1-2 parts bis(2,5) vulcanizing agent.

[0006] Preferably, the raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 1 part of activated magnesium oxide, 0.5 parts of microcrystalline wax, 1 part of graphene powder, and 0.5 parts of bis(2,5) vulcanizing agent.

[0007] Preferably, the raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 1 part of activated magnesium oxide, 0.5 parts of microcrystalline wax, 1 part of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

[0008] Preferably, the raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 2 parts of activated magnesium oxide, 0.5 parts of microcrystalline wax, 3 parts of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

[0009] Preferably, the raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 6 parts of fumed silica, 0.5 parts of aluminum silicate, 2 parts of activated magnesium oxide, 0.5 parts of microcrystalline wax, 3 parts of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

[0010] Preferably, the preparation method of the battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicle interiors includes the following steps:

[0011] S1. Raw material pretreatment: Weigh the fluorosilicone rubber and cut it. Dry the fumed silica at 120-150℃ to remove the adsorbed moisture. Then put the dried fumed silica into a plasma treatment device for modification. Put the aluminum silicate into an ultrasonic device for modification. Mix the active magnesium oxide and graphene powder evenly for later use.

[0012] S2. Main mixing: In an internal mixer, add fluorosilicone rubber and plasticize it. Control the temperature at 60-80℃. Add the modified fumed silica, aluminum silicate and mixed fillers in batches and mix until uniformly dispersed. Add microcrystalline wax and continue mixing for 5-10 minutes.

[0013] S3. Addition of vulcanizing agent: When the temperature of the mixer drops below 50℃, add the 2,5 vulcanizing agent and mix for 3-5 minutes until evenly dispersed;

[0014] S4. Discharge and pretreatment: Press the mixed material into sheets using a two-roll mill, with the thickness controlled at 2-5mm. Let the pressed material stand at room temperature for 24 hours.

[0015] S5. Molding and vulcanization: The pretreated sheath material is placed in the mold and filled according to the design shape. It is vulcanized in a vulcanizing machine. The initial vulcanization temperature is controlled at 160-180℃ and the vulcanization time is 5-15 minutes. Then, it is kept at 180-200℃ for 4-6 hours for post-vulcanization treatment, which yields the battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles.

[0016] Preferably, in step S1, the specific method for modifying the dried fumed silica by placing it into a plasma treatment device is as follows: the dried fumed silica is placed into a plasma chamber, the chamber is closed, the chamber pressure is reduced to a preset value using a vacuum pump, oxygen is injected into the chamber to stabilize the chamber pressure within the target range, the plasma source is turned on, the excitation process is started, the power is set to 50-300W, and after processing for 5-15 minutes, the plasma source is turned off, the oxygen supply is stopped, and the treated fumed silica is removed.

[0017] Preferably, in step S1, the specific method for modifying aluminum silicate by placing it in an ultrasonic device is as follows: dispersing aluminum silicate particles in deionized water to obtain an aluminum silicate dispersion with a concentration of 5%-10%; placing the aluminum silicate dispersion in an ultrasonic device with a power of 300W-600W and a temperature of 30-50℃, ultrasonically treating it for 20-40 minutes, removing the water from the aluminum silicate dispersion using a centrifuge, and then drying the dehydrated aluminum silicate.

[0018] The beneficial effects of this invention are as follows:

[0019] This invention, through the selection of novel high-performance fluorosilicone rubber combined with optimized formulation design, significantly overcomes the shortcomings of existing technologies and exhibits superior performance. The material uses fluorosilicone rubber as the main component, demonstrating significant advantages over traditional XLPE and SR silicone rubber in terms of corrosion resistance, mechanical properties, and aging resistance. Its corrosion resistance is further enhanced by the addition of graphene powder, ensuring long-term stability in highly corrosive battery fluid environments. Regarding mechanical properties, by controlling the segment length and crosslinking site content of the fluorosilicone rubber, and simultaneously adding fumed silica as a reinforcing filler, the strength and flexibility of the sheath material are effectively improved, meeting the mechanical performance requirements of high-voltage cables while maintaining good flexibility. The material also possesses excellent heat resistance and aging resistance. The addition of activated magnesium oxide neutralizes high-temperature decomposition products, significantly improving the material's thermal stability and enabling it to exhibit long-lasting performance stability in high-temperature and harsh environments. Simultaneously, the addition of aluminum silicate improves the material's processing performance, and microcrystalline wax further enhances molding flowability, allowing the material to adapt to sheath production processes with complex geometries. The overall formulation system is rationally designed, balancing high performance and low cost, and meets the needs of the new energy vehicle industry for high-performance and high-reliability sheath materials, providing the industry with a solution that is both economical and sustainable. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1: Step 1, weigh out 50 parts of fluorosilicone rubber, 10 parts of fumed silica, 3 parts of aluminum silicate, 5 parts of active magnesium oxide, 1 part of microcrystalline wax, 5 parts of graphene powder, and 2 parts of bis(2,5) vulcanizing agent.

[0022] Step 2: Place the dried fumed silica into the plasma chamber, close the chamber, use a vacuum pump to reduce the chamber pressure to the preset value, then inject oxygen into the chamber to stabilize the chamber pressure within the target range, turn on the plasma source, start the excitation process, set the power to 50-300W, process for 5-15 minutes, then turn off the plasma source, stop the oxygen supply, and take out the processed fumed silica.

[0023] Step 3: Disperse aluminum silicate particles in deionized water to obtain an aluminum silicate dispersion with a concentration of 5%-10%; place the aluminum silicate dispersion in an ultrasonic treatment container with a power of 300W-600W and a temperature of 30-50℃, and ultrasonically treat for 20-40 minutes. Then, use a centrifuge to remove the water from the aluminum silicate dispersion and dry the dehydrated aluminum silicate; mix the active magnesium oxide and graphene powder evenly and set aside.

[0024] Step 4: In the internal mixer, add fluorosilicone rubber and plasticize it. Control the temperature at 60-80℃. Add the modified fumed silica, aluminum silicate and mixed filler in batches and mix until uniformly dispersed. Add microcrystalline wax and continue mixing for 5-10 minutes.

[0025] Step 5: When the temperature of the mixer drops below 50°C, add the 2,5-dimethyl vulcanizing agent and mix for 3-5 minutes until evenly dispersed.

[0026] Step 6: Press the mixed material into sheets using a two-roll open mill, controlling the thickness to 2-5mm, and let the pressed material stand at room temperature for 24 hours.

[0027] Step 7: Place the pretreated sheath material into the mold, fill it according to the design shape, and vulcanize it in a vulcanizing machine. The initial vulcanization temperature is controlled at 160-180℃, and the vulcanization time is 5-15 minutes. Then, keep it at 180-200℃ for 4-6 hours for post-vulcanization treatment to obtain the battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles.

[0028] Example 2: Compared with Example 1, the difference lies in step 1, weighing 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 1 part of active magnesium oxide, 0.5 parts of microcrystalline wax, 1 part of graphene powder, and 0.5 parts of bis(2,5) vulcanizing agent.

[0029] Example 3: Compared with Example 1, the difference lies in step 1, weighing 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 1 part of active magnesium oxide, 0.5 parts of microcrystalline wax, 1 part of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

[0030] Example 4: Compared with Example 1, the difference lies in step 1, weighing 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 2 parts of active magnesium oxide, 0.5 parts of microcrystalline wax, 3 parts of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

[0031] Example 5: Compared with Example 1, the difference lies in step 1, weighing 100 parts of fluorosilicone rubber, 6 parts of fumed silica, 0.5 parts of aluminum silicate, 2 parts of active magnesium oxide, 0.5 parts of microcrystalline wax, 3 parts of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

[0032] The tensile strength, tear strength, elongation at break, hardness, tensile strength after immersion, tear strength after immersion, and elongation at break of the battery-resistant fluorosilicone rubber high-voltage cable sheath material prepared in Examples 2-5 were tested. The test results are shown in Table 1.

[0033] Table 1

[0034]

[0035] Material hardness testing: The hardness of the material is tested using a Shore A hardness tester to ensure that the hardness value is within the range of 40 to 50 Shore A, so as to meet the hardness requirements of high-voltage cable sheaths.

[0036] Tensile strength and tear strength testing: The tensile strength and tear strength of the material are tested using a tensile testing machine and a tear strength testing machine to ensure that the tensile strength is ≥10.0MPa and the tear strength is ≥25kN / m, so as to meet the strength and toughness requirements of high-voltage cables.

[0037] Strain testing: Test the strain properties of the material to ensure that the strain is ≥150% in order to meet the deformation requirements of high-voltage cables under complex working conditions.

[0038] Battery fluid corrosion resistance test: The material is immersed in battery fluid, and the appearance is observed to be undamaged. The retention rate of other indicators is tested to ensure that the material is stable and safe in the battery fluid environment.

[0039] Heat resistance and aging resistance testing: The heat resistance and aging resistance of the material are tested through high temperature aging test and accelerated aging test to ensure that the material can maintain stable performance for a long time under high temperature and harsh environment.

[0040] In summary, this invention provides a novel battery-resistant fluorosilicone rubber high-voltage cable sheath material for automotive applications. By employing a novel high-performance fluorosilicone rubber material, an optimized formulation system, and advanced manufacturing processes, it achieves high stability, high safety, and low cost in long-term use of the high-voltage cable sheath material. Through rigorous quality control and testing, this invention has demonstrated its superiority and practicality, providing new ideas and directions for the research and development and application of automotive high-voltage cable sheath materials.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A battery-resistant fluorosilicone rubber high-voltage cable sheath material for automotive interiors, characterized in that, The raw materials include the following parts by weight: 50-100 parts of fluorosilicone rubber, 2-10 parts of fumed silica, 0.5-3 parts of aluminum silicate, 0.5-5 parts of activated magnesium oxide, 0.5-1 part of microcrystalline wax, 0.5-5 parts of graphene powder, and 0.1-2 parts of bis(2,5) vulcanizing agent.

2. The battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to claim 1, characterized in that, The raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 1 part of activated magnesium oxide, 0.5 parts of microcrystalline wax, 1 part of graphene powder, and 0.5 parts of bis(2,5) vulcanizing agent.

3. The battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to claim 1, characterized in that, The raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 1 part of activated magnesium oxide, 0.5 parts of microcrystalline wax, 1 part of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

4. The battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to claim 1, characterized in that, The raw materials include the following parts by weight: 100 parts of fluorosilicone rubber, 4 parts of fumed silica, 0.5 parts of aluminum silicate, 2 parts of active magnesium oxide, 0.5 parts of microcrystalline wax, 3 parts of graphene powder, and 1.5 parts of bis(2,5) vulcanizing agent.

5. The battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to claim 1, characterized in that, The raw materials include the following parts by weight: 100 parts fluorosilicone rubber, 6 parts fumed silica, 0.5 parts aluminum silicate, 2 parts activated magnesium oxide, 0.5 parts microcrystalline wax, 3 parts graphene powder, and 1.5 parts bis(2,5) vulcanizing agent.

6. A battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to any one of claims 1-5, characterized in that, The preparation method of the battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicle interiors includes the following steps: S1. Raw material pretreatment: Weigh the fluorosilicone rubber and cut it. Dry the fumed silica at 120-150℃ to remove the adsorbed moisture. Then put the dried fumed silica into a plasma treatment device for modification. Put the aluminum silicate into an ultrasonic device for modification. Mix the active magnesium oxide and graphene powder evenly for later use. S2. Main mixing: In an internal mixer, add fluorosilicone rubber and plasticize it. Control the temperature at 60-80℃. Add the modified fumed silica, aluminum silicate and mixed fillers in batches and mix until uniformly dispersed. Add microcrystalline wax and continue mixing for 5-10 minutes. S3. Addition of vulcanizing agent: When the temperature of the mixer drops below 50℃, add the 2,5 vulcanizing agent and mix for 3-5 minutes until evenly dispersed; S4. Discharge and pretreatment: Press the mixed material into sheets using a two-roll mill, with the thickness controlled at 2-5mm. Let the pressed material stand at room temperature for 24 hours. S5. Molding and vulcanization: The pretreated sheath material is placed in the mold and filled according to the design shape. It is vulcanized in a vulcanizing machine. The initial vulcanization temperature is controlled at 160-180℃ and the vulcanization time is 5-15 minutes. Then, it is kept at 180-200℃ for 4-6 hours for post-vulcanization treatment, which yields the battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles.

7. The battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to claim 6, characterized in that, In step S1, the specific method for modifying the dried fumed silica in a plasma treatment device is as follows: the dried fumed silica is placed in the plasma chamber, the chamber is closed, the chamber pressure is reduced to a preset value using a vacuum pump, oxygen is injected into the chamber to stabilize the chamber pressure within the target range, the plasma source is turned on, the excitation process is started, the power is set to 50-300W, and after processing for 5-15 minutes, the plasma source is turned off, the oxygen supply is stopped, and the treated fumed silica is removed.

8. The battery-resistant fluorosilicone rubber high-voltage cable sheath material for vehicles according to claim 6, characterized in that, In step S1, the specific method for modifying aluminum silicate by placing it in an ultrasonic device is as follows: disperse aluminum silicate particles in deionized water to obtain an aluminum silicate dispersion with a concentration of 5%-10%; place the aluminum silicate dispersion in an ultrasonic device with a power of 300W-600W and a temperature of 30-50℃, ultrasonically treat for 20-40 minutes, remove the water from the aluminum silicate dispersion using a centrifuge, and then dry the dehydrated aluminum silicate.

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