A new type of fireproof, high temperature resistant and insulating battery high voltage connector and its manufacturing process

Abstract

The present invention relates to the field of automotive battery technology, and more particularly to a novel fireproof, high temperature resistant and insulating battery high voltage connector and a manufacturing process for the battery high voltage connector, wherein the battery high voltage connector comprises a conductive part and an insulating part, wherein the insulating part covers the conductive part, and the insulating part comprises a first insulating layer, a second insulating layer and a protective layer, wherein the first insulating layer covers the conductive part by extrusion molding, and the first insulating layer is made of ceramic silicone rubber, the second insulating layer is arranged on the outer surface of the first insulating layer, and the protective layer is coated on the outer surface of the second insulating layer. The present invention adopts a first insulating layer made of ceramic silicone rubber to cover the conductive part by extrusion molding, and then arranges a second insulating layer on the outer surface of the first insulating layer, and coats a protective layer on the outer surface of the second insulating layer. The ceramic silicone rubber still has an insulating effect when sintered at a high temperature, so that the present invention can still have a conductive effect at a high temperature, and avoids the phenomenon of the first insulating layer failing due to moisture absorption.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile batteries, and in particular to a novel fireproof, high temperature resistant and insulating battery high voltage connector and a manufacturing process thereof. Background Art

[0002] At present, new energy vehicles are becoming more and more popular, and the energy of new energy vehicles mainly comes from their batteries, which realize the functions of the engine and other components of the car. However, the global temperature is gradually rising, which may cause the spontaneous combustion of cars. Therefore, the high-voltage battery connector of the car must still have an insulating effect under high temperature or even fire to ensure power supply, so that the car passengers can still leave safely after the car spontaneously combusts.

[0003] In response to this, many new energy vehicle companies have conducted research, among which BYD has adopted a technical solution: aluminum bars are dipped in PI and then wrapped with mica. Since mica easily absorbs moisture, the insulation resistance drops significantly. Summary of the invention

[0004] In view of the problems of the prior art, the present invention provides a novel fireproof, high temperature resistant and insulating battery high voltage connector and a manufacturing process.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a novel fireproof, high temperature resistant and insulated battery high voltage connector, comprising a conductive part and an insulating part, wherein the insulating part covers the conductive part, the insulating part comprises a first insulating layer, a second insulating layer and a protective layer, the first insulating layer covers the conductive part by extrusion molding, the first insulating layer is made of ceramic silicone rubber, the second insulating layer is arranged on the outer surface of the first insulating layer, and the protective layer is coated on the outer surface of the second insulating layer.

[0007] Furthermore, the second insulating layer is glass fiber, and the second insulating layer is arranged on the outer surface of the first insulating layer by weaving.

[0008] Furthermore, the protective layer is silicone or Teflon.

[0009] Furthermore, the conductive part is made of copper or aluminum, and is formed by bending.

[0010] The present invention also provides a novel fireproof, high temperature resistant and insulating battery high voltage connector manufacturing process, comprising the following steps:

[0011] S1. Preparation of ceramic silicone rubber;

[0012] S2. Extruding ceramic silicone rubber on the conductive portion to form a first insulating layer;

[0013] S3. A second insulating layer is formed by weaving on the surface of the first insulating layer;

[0014] S4. Applying a coating on the surface of the second insulating layer to form a protective layer;

[0015] S5. Bend the conductive part into shape to form a battery high voltage connector.

[0016] Furthermore, the ceramic silicone rubber is mainly composed of component A and component B in a weight ratio of 0.8-1.2:1, wherein component A includes the following raw materials in parts by weight:

[0017] Silicone rubber A 60-140 parts

[0018] Reinforcing agent 35-45 parts

[0019] Filler A 60-100 parts

[0020] Silane additive A 11.4-17.2 parts

[0021] Lubricant A 0.15-0.25 parts

[0022] Flame retardant 0.1-0.3 parts

[0023] Vulcanizing agent 0.5-1.5 parts;

[0024] Component B includes the following raw materials in parts by weight:

[0025] Silicone rubber B 60-140 parts

[0026] Filler B 230-290 parts

[0027] Silane additive B 3-6 parts

[0028] Lubricant B 0.2-0.4 parts.

[0029] Furthermore, step S1 specifically includes:

[0030] (I) Preparation of component A:

[0031] S11, first put the raw material silicone rubber A into the internal mixer and stir for 4-6 minutes;

[0032] S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A;

[0033] S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times;

[0034] S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber;

[0035] S15, discharging the mixed rubber, putting it into an open mixing mill for even mixing, lowering the roller, and leaving it to stand by;

[0036] (II) Preparation of component B:

[0037] S11), first put the raw material silicone rubber B into the internal mixer and stir for 4-6 minutes;

[0038] S12), adding lubricant B and part of filler B, and then adding silane additive B;

[0039] S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions;

[0040] S14), after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a rubber mix;

[0041] S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby;

[0042] (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber:

[0043] (S11), putting component A and component B into an open mill in proportion and mixing them evenly, adding a flame retardant, passing them through a thin roller five times, putting them into a filter, filtering them with a 150-mesh filter screen, and obtaining a mixed rubber;

[0044] (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, and then putting it into a mold for vulcanization molding.

[0045] Furthermore, step (S12) is prepared by vulcanization at a temperature of 218-222°C and a pressure of 0.02 atmospheres for 8 hours.

[0046] Furthermore, step S2 is completed within 1.2-2.2 minutes at a temperature of 248-255°C.

[0047] Furthermore, in step S4, the coating is silicone resin or Teflon solution, and step S4 is completed within 4.5-5.5 minutes at a temperature of 195-205°C.

[0048] Beneficial effects of the present invention: The present invention adopts a first insulating layer made of ceramic silicone rubber to cover the conductive part by extrusion molding, and then a second insulating layer is arranged on the outer surface of the first insulating layer, and a protective layer is coated on the outer surface of the second insulating layer. The ceramic silicone rubber still has an insulating effect when sintered at a high temperature, so that the present invention can still have a conductive effect at a high temperature, avoiding the high production cost and the phenomenon of moisture absorption failure of the first insulating layer.

[0049] Ceramic silicone rubber is usually used in the cable industry. The present invention uses this material across fields to achieve the effect of maintaining insulation at high temperatures, thereby improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the present invention.

[0051] Reference numerals: 1—conductive portion, 2—insulating portion, 3—first insulating layer, 4—second insulating layer, 5—protective layer. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0053] Example 1

[0054] like Figure 1 As shown, this embodiment provides a new type of fire-proof, high-temperature-resistant and insulated battery high-voltage connector, including a conductive part and an insulating part, wherein the insulating part covers the conductive part, and the insulating part includes a first insulating layer, a second insulating layer and a protective layer. The first insulating layer covers the conductive part by extrusion molding, and the first insulating layer is made of ceramic silicone rubber. The second insulating layer is arranged on the outer surface of the first insulating layer, and the protective layer is coated on the outer surface of the second insulating layer.

[0055] The conductive part of the present invention is made of copper or aluminum, and the conductive part is formed by bending. Since the refractory ceramic silicone rubber will be crusted into porcelain at a high temperature above 400°C, the ceramic has the property of high temperature resistance to ensure the insulation effect. Therefore, the present invention is coated with a first insulating layer to cover the conductive part, and then a second insulating layer is arranged on the first insulating layer, which is conducive to enhancing the insulation and high temperature resistance effects of the present invention. The protective layer coated on the second insulating layer has the effect of improving the overall strength of the present invention, which is conducive to the present invention being able to maintain its original shape and work even if it is hit or other accidents during use.

[0056] In this embodiment, the second insulating layer is glass fiber, and the second insulating layer is arranged on the outer surface of the first insulating layer by weaving. Glass fiber has the advantages of good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. It is arranged outside the first insulating layer by weaving, which can effectively improve the insulation and high temperature resistance effect of the present invention, making the actual operation of the invention more stable.

[0057] In this embodiment, the protective layer is silicone or Teflon. Since glass fiber is brittle and has poor wear resistance, the present invention specifically sets a protective layer to protect it, so that the second insulating layer will not directly contact the outside world, thereby improving the wear resistance of the present invention.

[0058] Since ceramic silicone rubber is usually used in the cable field rather than the battery field, the present invention achieves the following effects by using materials across fields: when the conductive part is an aluminum bar, it can maintain an insulating effect after being burned at a high temperature of 400°C for 20 minutes; when the conductive part is a copper bar, it can maintain an insulating effect after being burned at a high temperature of 1000°C for 20 minutes, so that passengers in new energy vehicles using the present invention can smoothly open the door and leave when the car catches fire.

[0059] Example 2

[0060] The present invention also provides a novel fireproof, high temperature resistant and insulated battery high voltage connector manufacturing process, which is mainly used to prepare the battery high voltage connector described in Example 1, and comprises the following steps:

[0061] S1. Preparation of ceramic silicone rubber;

[0062] S2. Extruding ceramic silicone rubber on the conductive portion to form a first insulating layer;

[0063] S3. A second insulating layer is formed by weaving on the surface of the first insulating layer;

[0064] S4. Applying a coating on the surface of the second insulating layer to form a protective layer;

[0065] S5. Bend the conductive part into shape to form a battery high voltage connector.

[0066] That is, the present invention first prepares ceramic silicone rubber, and then sets a first insulating layer, a second insulating layer and a protective layer on the surface of the conductive part, and then bends the conductive part to form a battery high-voltage connector, which can ensure reliable contact of each layer, so that the molded battery high-voltage connector will not be damaged and affect the high-temperature resistant insulation effect.

[0067] In this embodiment, ceramic silicone rubber is currently mainly used in the cable industry, and the present invention is the first to apply ceramic silicone rubber to battery high-voltage connectors. The ceramic silicone rubber is mainly composed of component A and component B in a weight ratio of 0.8-1.2:1, wherein component A includes the following raw materials in parts by weight:

[0068]

[0069] Component B includes the following raw materials in parts by weight:

[0070]

[0071] The silicone rubber A is a mixture of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B in a weight ratio of 30:30; wherein the vinyl content of the methyl vinyl silicone rubber A is 0.02% and the molecular weight is 640,000; the vinyl content of the methyl vinyl silicone rubber B is 0.21% and the molecular weight is 640,000.

[0072] The reinforcing agent is fumed silica with a particle size of 10 nm and a specific surface area of ​​200 m2 / g.

[0073] The filler A is a mixture of mica powder, glass powder, montmorillonite and wollastonite in a weight ratio of 15:15:15:15.

[0074] The silane auxiliary agent A is a mixture of terminal hydroxyl polydimethylsiloxane, tetramethyldivinyldisilazane, vinyltrimethoxysilane and vinyltriethoxysilane in a weight ratio of 10:1:0.2:0.2.

[0075] The lubricant A is a mixture of zinc stearate and stearic acid in a weight ratio of 0.05:0.05; the flame retardant is a platinum flame retardant with a platinum mass content of 1000 ppm; and the vulcanizing agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0076] The silicone rubber B is a mixture of methyl vinyl silicone rubber a and methyl vinyl silicone rubber b in a weight ratio of 30:30; wherein the vinyl content of the methyl vinyl silicone rubber a is 0.02% and the molecular weight is 640,000; the vinyl content of the methyl vinyl silicone rubber b is 0.12% and the molecular weight is 640,000.

[0077] The filler B is a mixture of ultrafine aluminum hydroxide powder, ultrafine magnesium hydroxide powder, calcium carbonate and zinc oxide in a weight ratio of 200:20:5:5; the silane additive B is a mixture of vinyl trimethoxy silane and hexamethyldisilazane in a weight ratio of 2:1; and the lubricant B is zinc stearate.

[0078] Specifically, step S1 specifically includes:

[0079] (I) Preparation of component A:

[0080] S11, first put the raw material silicone rubber A into the internal mixer and stir for 4 minutes;

[0081] S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A;

[0082] S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times;

[0083] S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber;

[0084] S15, discharging the mixed rubber, putting it into an open mixing mill for even mixing, lowering the roller, and leaving it to stand by;

[0085] (II) Preparation of component B:

[0086] S11), first put the raw material silicone rubber B into the internal mixer and stir for 4 minutes;

[0087] S12), adding lubricant B and part of filler B, and then adding silane additive B;

[0088] S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions;

[0089] S14), after the above raw materials are mixed into a mass, the temperature is increased to mix the rubber to obtain the internal rubber; the process parameters of the temperature mixing are: after the temperature is increased to 90°C, kneading for 140 minutes, and then vacuuming for 40 minutes, and the vacuum degree is -0.06Mpa; in the step 4), the process parameters of the temperature mixing are: after the temperature is increased to 90°C, kneading for 80 minutes, and then vacuuming for 40 minutes, and the vacuum degree is -0.06Mpa; in the step (2), the vulcanization temperature is 160°C and the vulcanization time is 12 minutes;

[0090] S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby;

[0091] (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber:

[0092] (S11), putting component A and component B into an open mill in proportion and mixing them evenly, adding a flame retardant, passing them through a thin roller five times, putting them into a filter, filtering them with a 150-mesh filter screen, and obtaining a mixed rubber;

[0093] (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, and then putting it into a mold for vulcanization molding.

[0094] Specifically, step (S12) is prepared by vulcanization for 8 hours at a temperature of 218-222°C (preferably 220°C) and a pressure of 0.02 atmospheres.

[0095] In this embodiment, step S2 is completed within 1.2-2.2 minutes (preferably 2 minutes) at a temperature of 248-255° C. (preferably 250° C.).

[0096] Furthermore, in step S4, the coating is a silicone resin or a Teflon solution, and step S4 is completed within 4.5-5.5 minutes (preferably 5 minutes) at a temperature of 195-205° C. (preferably 200° C.).

[0097] Example 3

[0098] Compared with the embodiment, this embodiment is different in that it is composed of component A and component B in a weight ratio of 1:1, wherein component A includes

[0099] The following raw materials are in parts by weight:

[0100]

[0101] Component B includes the following raw materials in parts by weight:

[0102]

[0103]

[0104] The silicone rubber A is a mixture of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B in a weight ratio of 70:30; wherein the vinyl content of the methyl vinyl silicone rubber A is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber B is 0.23% and the molecular weight is 650,000.

[0105] The reinforcing agent is fumed silica with a particle size of 20 nm and a specific surface area of ​​220 m2 / g.

[0106] The filler A is a mixture of mica powder, glass powder, montmorillonite and wollastonite in a weight ratio of 20:20:20:20.

[0107] The silane auxiliary agent A is a mixture of terminal hydroxyl polydimethylsiloxane, tetramethyldivinyldisilazane, vinyltrimethoxysilane and vinyltriethoxysilane in a weight ratio of 12:2:0.4:0.4.

[0108] The lubricant A is a mixture of zinc stearate and stearic acid in a weight ratio of 0.1:0.1; the flame retardant is a platinum flame retardant with a platinum content of 1500 ppm; and the vulcanizing agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0109] The silicone rubber B is a mixture of methyl vinyl silicone rubber a and methyl vinyl silicone rubber b in a weight ratio of 50:50; wherein the vinyl content of the methyl vinyl silicone rubber a is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber b is 0.14% and the molecular weight is 650,000.

[0110] The filler B is a mixture of ultrafine aluminum hydroxide powder, ultrafine magnesium hydroxide powder, calcium carbonate and zinc oxide in a weight ratio of 200:30:10:10; the silane additive B is a mixture of vinyl trimethoxy silane and hexamethyldisilazane in a weight ratio of 3:1.5; and the lubricant B is zinc stearate.

[0111] A method for preparing ceramic fire-resistant and flame-retardant silicone rubber comprises the following steps:

[0112] (I) Preparation of component A:

[0113] S11, first put the raw material silicone rubber A into the internal mixer and stir for 4.5 minutes;

[0114] S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A;

[0115] S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times;

[0116] S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber;

[0117] S15, discharging the mixed rubber, putting it into an open mixing mill for even mixing, lowering the roller, and leaving it to stand by;

[0118] (II) Preparation of component B:

[0119] S11), first put the raw material silicone rubber B into the internal mixer and stir for 4.5 minutes;

[0120] S12), adding lubricant B and part of filler B, and then adding silane additive B;

[0121] S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions;

[0122] S14), after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a rubber mix;

[0123] S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby;

[0124] (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber:

[0125] (S11), put component A and component B into the open mill in proportion and mix them evenly, add flame retardant, pass through five times and then lower the roller, and place

[0126] Enter the filter and filter with a 150-mesh filter to obtain the slurry;

[0127] (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, placing it into a mold for vulcanization molding, and obtaining a ceramicized fire-resistant and flame-retardant silicone rubber.

[0128] In step S14, the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 95°C, kneading for 130 minutes, and then vacuuming for 50 minutes, with the vacuum degree at -0.07Mpa; in step 4), the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 95°C, kneading for 70 minutes, and then vacuuming for 50 minutes, with the vacuum degree at -0.07Mpa; in step (2), the vulcanization temperature is 165°C, and the vulcanization time is 11 minutes.

[0129] Example 4

[0130] Compared with Example 2 and Example 3, this embodiment is different in that it is composed of component A and component B in a weight ratio of 0.8-1.2:1, wherein component A

[0131] The invention comprises the following raw materials in parts by weight:

[0132]

[0133] Component B includes the following raw materials in parts by weight:

[0134]

[0135]

[0136] The silicone rubber A is a mixture of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B in a weight ratio of 50:50; wherein the vinyl content of the methyl vinyl silicone rubber A is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber B is 0.23% and the molecular weight is 650,000.

[0137] The reinforcing agent is fumed silica with a particle size of 30 nm and a specific surface area of ​​250 m2 / g.

[0138] The filler A is a mixture of mica powder, glass powder, montmorillonite and wollastonite in a weight ratio of 20:20:20:15.

[0139] The silane auxiliary agent A is a mixture of terminal hydroxyl polydimethylsiloxane, tetramethyldivinyldisilazane, vinyltrimethoxysilane and vinyltriethoxysilane in a weight ratio of 12:2:0.4:0.4.

[0140] The lubricant A is a mixture of zinc stearate and stearic acid in a weight ratio of 0.1:0.1; the flame retardant is a platinum flame retardant with a platinum content of 2000 ppm; and the vulcanizing agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0141] The silicone rubber B is a mixture of methyl vinyl silicone rubber a and methyl vinyl silicone rubber b in a weight ratio of 70:30; wherein the vinyl content of the methyl vinyl silicone rubber a is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber b is 0.16% and the molecular weight is 650,000.

[0142] The filler B is a mixture of ultrafine aluminum hydroxide powder, ultrafine magnesium hydroxide powder, calcium carbonate and zinc oxide in a weight ratio of 220:30:5:5; the silane additive B is vinyl trimethoxysilane and hexamethyldisilazane, which is composed of component A and component B in a weight ratio of 0.8-1.2:1, wherein component A includes the following raw materials in parts by weight:

[0143]

[0144] Component B includes the following raw materials in parts by weight:

[0145]

[0146] The silicone rubber A is a mixture of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B in a weight ratio of 50:50; wherein the vinyl content of the methyl vinyl silicone rubber A is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber B is 0.23% and the molecular weight is 650,000.

[0147] The reinforcing agent is fumed silica with a particle size of 30 nm and a specific surface area of ​​250 m2 / g.

[0148] The filler A is a mixture of mica powder, glass powder, montmorillonite and wollastonite in a weight ratio of 20:20:20:15.

[0149] The silane auxiliary agent A is a mixture of terminal hydroxyl polydimethylsiloxane, tetramethyldivinyldisilazane, vinyltrimethoxysilane and vinyltriethoxysilane in a weight ratio of 12:2:0.4:0.4.

[0150] The lubricant A is a mixture of zinc stearate and stearic acid in a weight ratio of 0.1:0.1; the flame retardant is a platinum flame retardant with a platinum content of 2000 ppm; and the vulcanizing agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0151] The silicone rubber B is a mixture of methyl vinyl silicone rubber a and methyl vinyl silicone rubber b in a weight ratio of 70:30; wherein the vinyl content of the methyl vinyl silicone rubber a is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber b is 0.16% and the molecular weight is 650,000.

[0152] The filler B is a mixture of ultrafine aluminum hydroxide powder, ultrafine magnesium hydroxide powder, calcium carbonate and zinc oxide in a weight ratio of 220:30:5:5; the silane additive B is a mixture of vinyl trimethoxysilane and hexamethyldisilazane in a weight ratio of 3:1.5; and the lubricant B is zinc stearate.

[0153] A method for preparing ceramic fire-resistant and flame-retardant silicone rubber comprises the following steps:

[0154] (I) Preparation of component A:

[0155] S11, first put the raw material silicone rubber A into the internal mixer and stir for 5 minutes;

[0156] S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A;

[0157] S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times;

[0158] S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber;

[0159] S15, discharging the mixed rubber, putting it into an open mixing mill for even mixing, lowering the roller, and leaving it to stand by;

[0160] (II) Preparation of component B:

[0161] S11), first put the raw material silicone rubber B into the internal mixer and stir for 5 minutes;

[0162] S12), adding lubricant B and part of filler B, and then adding silane additive B;

[0163] S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions;

[0164] S14), after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a rubber mix;

[0165] S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby;

[0166] (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber:

[0167] (S11), putting component A and component B into an open mill in proportion and mixing them evenly, adding a flame retardant, passing them through a thin roller five times, putting them into a filter, filtering them with a 150-mesh filter screen, and obtaining a mixed rubber;

[0168] (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, placing it into a mold for vulcanization molding, and obtaining a ceramicized fire-resistant and flame-retardant silicone rubber.

[0169] In step S14, the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 100°C, kneading for 120 minutes, and then vacuuming for 60 minutes, with the vacuum degree at -0.08Mpa; in step 4), the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 100°C, kneading for 60 minutes, and then vacuuming for 60 minutes, with the vacuum degree at -0.08Mpa; in step (2), the vulcanization temperature is 170°C and the vulcanization time is 10 minutes.

[0170] Example 5

[0171] Compared with Example 2, Example 3 and Example 4, this embodiment is different in that it is composed of component A and component B in a weight ratio of 0.8-1.2:1, wherein component A includes the following raw materials in parts by weight:

[0172]

[0173]

[0174] Component B includes the following raw materials in parts by weight:

[0175]

[0176] The silicone rubber A is a mixture of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B in a weight ratio of 30:70; wherein the vinyl content of the methyl vinyl silicone rubber A is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber B is 0.23% and the molecular weight is 650,000.

[0177] The reinforcing agent is fumed silica with a particle size of 40 nm and a specific surface area of ​​280 m2 / g.

[0178] The filler A is a mixture of mica powder, glass powder, montmorillonite and wollastonite in a weight ratio of 20:20:20:20.

[0179] The silane auxiliary agent A is a mixture of terminal hydroxyl polydimethylsiloxane, tetramethyldivinyldisilazane, vinyltrimethoxysilane and vinyltriethoxysilane in a weight ratio of 12:2:0.4:0.4.

[0180] The lubricant A is a mixture of zinc stearate and stearic acid in a weight ratio of 0.1:0.1; the flame retardant is a platinum flame retardant with a platinum content of 2500 ppm; and the vulcanizing agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0181] The silicone rubber B is a mixture of methyl vinyl silicone rubber a and methyl vinyl silicone rubber b in a weight ratio of 30:70; wherein the vinyl content of the methyl vinyl silicone rubber a is 0.04% and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber b is 0.16% and the molecular weight is 650,000.

[0182] The filler B is a mixture of ultrafine aluminum hydroxide powder, ultrafine magnesium hydroxide powder, calcium carbonate and zinc oxide in a weight ratio of 200:20:20:20; the silane additive B is a mixture of vinyltrimethoxysilane and hexamethyldisilazane in a weight ratio of 3:1.5; and the lubricant B is zinc stearate.

[0183] A method for preparing ceramic fire-resistant and flame-retardant silicone rubber comprises the following steps:

[0184] (I) Preparation of component A:

[0185] S11, first put the raw material silicone rubber A into the internal mixer and stir for 5.5 minutes;

[0186] S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A;

[0187] S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times;

[0188] S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber;

[0189] S15, discharging the mixed rubber, putting it into an open mixing mill for even mixing, lowering the roller, and leaving it to stand by;

[0190] (II) Preparation of component B:

[0191] S11), first put the raw material silicone rubber B into the internal mixer and stir for 5.5 minutes;

[0192] S12), adding lubricant B and part of filler B, and then adding silane additive B;

[0193] S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions;

[0194] S14), after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a rubber mix;

[0195] S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby;

[0196] (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber:

[0197] (S11), putting component A and component B into an open mill in proportion and mixing them evenly, adding a flame retardant, passing them through a thin roller five times, putting them into a filter, filtering them with a 150-mesh filter screen, and obtaining a mixed rubber;

[0198] (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, placing it into a mold for vulcanization molding, and obtaining a ceramicized fire-resistant and flame-retardant silicone rubber.

[0199] In step S14, the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 105°C, kneading for 110 minutes, and then vacuuming for 70 minutes, with the vacuum degree at -0.09Mpa; in step 4), the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 105°C, kneading for 50 minutes, and then vacuuming for 70 minutes, with the vacuum degree at -0.09Mpa; in step (2), the vulcanization temperature is 175°C, and the vulcanization time is 9 minutes.

[0200] Example 6

[0201] Compared with Example 2, Example 3, Example 4 and Example 5, this embodiment is different in that it is composed of component A and component B in a weight ratio of 1.2:1, wherein component A includes the following raw materials in parts by weight:

[0202]

[0203]

[0204] Component B includes the following raw materials in parts by weight:

[0205]

[0206] The silicone rubber A is a mixture of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B in a weight ratio of 70:70; wherein the vinyl content of the methyl vinyl silicone rubber A is 0.06% and the molecular weight is 660,000; the vinyl content of the methyl vinyl silicone rubber B is 0.25% and the molecular weight is 660,000.

[0207] The reinforcing agent is fumed silica with a particle size of 50 nm and a specific surface area of ​​300 m2 / g.

[0208] The filler A is a mixture of mica powder, glass powder, montmorillonite and wollastonite in a weight ratio of 25:25:25:25.

[0209] The silane auxiliary agent A is a mixture of terminal hydroxyl polydimethylsiloxane, tetramethyldivinyldisilazane, vinyltrimethoxysilane and vinyltriethoxysilane in a weight ratio of 14:2:0.6:0.6.

[0210] The lubricant A is a mixture of zinc stearate and stearic acid in a weight ratio of 0.15:0.15; the flame retardant is a platinum flame retardant with a platinum content of 3000 ppm; and the vulcanizing agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0211] The silicone rubber B is a mixture of methyl vinyl silicone rubber a and methyl vinyl silicone rubber b in a weight ratio of 70:70; wherein the vinyl content of the methyl vinyl silicone rubber a is 0.06% and the molecular weight is 660,000; the vinyl content of the methyl vinyl silicone rubber b is 0.18% and the molecular weight is 660,000.

[0212] The filler B is a mixture of ultrafine aluminum hydroxide powder, ultrafine magnesium hydroxide powder, calcium carbonate and zinc oxide in a weight ratio of 220:30:20:20; the silane additive B is a mixture of vinyl trimethoxysilane and hexamethyldisilazane in a weight ratio of 4:2; and the lubricant B is zinc stearate.

[0213] A method for preparing ceramic fire-resistant and flame-retardant silicone rubber comprises the following steps:

[0214] (I) Preparation of component A:

[0215] S11, first put the raw material silicone rubber A into the internal mixer and stir for 6 minutes;

[0216] S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A;

[0217] S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times;

[0218] S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber;

[0219] S15, discharging the mixed rubber, putting it into an open mixing mill for even mixing, lowering the roller, and leaving it to stand by;

[0220] (II) Preparation of component B:

[0221] S11), firstly put the raw material silicone rubber B into the internal mixer and stir for 6 minutes;

[0222] S12), adding lubricant B and part of filler B, and then adding silane additive B;

[0223] S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions;

[0224] S14), after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a rubber mix;

[0225] S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby;

[0226] (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber:

[0227] (S11), putting component A and component B into an open mill in proportion and mixing them evenly, adding a flame retardant, passing them through a thin roller five times, putting them into a filter, filtering them with a 150-mesh filter screen, and obtaining a mixed rubber;

[0228] (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, placing it into a mold for vulcanization molding, and obtaining a ceramicized fire-resistant and flame-retardant silicone rubber.

[0229] In step S14, the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 110°C, kneading for 100 minutes, and then vacuuming for 80 minutes, with the vacuum degree at -0.10 MPa; in step 4), the process parameters of the rubber mixing at elevated temperature are: after the temperature rises to 110°C, kneading for 40 minutes, and then vacuuming for 80 minutes, with the vacuum degree at -0.10 MPa; in step (2), the vulcanization temperature is 180°C, and the vulcanization time is 8 minutes.

[0230] The mechanical and physical properties of the ceramic fire-resistant and flame-retardant silicone rubbers prepared in Examples 1-5 are shown in Table 1:

[0231] Table 1

[0232]

[0233]

[0234] It can be seen from the above table that the ceramic fire-resistant and flame-retardant silicone rubber of the present invention has good fire-resistant and flame-retardant properties, as well as good hardness, strength, resilience and elongation, and has excellent comprehensive properties.

[0235] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A novel fireproof and high temperature resistant insulating battery high voltage connector, comprising a conductive part and an insulating part, wherein the insulating part covers the conductive part, and is characterized in that: The insulating part includes a first insulating layer, a second insulating layer and a protective layer, the first insulating layer covers the conductive part by extrusion molding, the first insulating layer is made of ceramic silicone rubber, the second insulating layer is arranged on the outer surface of the first insulating layer, and the protective layer is coated on the outer surface of the second insulating layer; The protective layer is silicone resin or Teflon; The battery high voltage connector is manufactured by the following steps: S1. Preparation of ceramic silicone rubber; S2. Extruding ceramic silicone rubber on the conductive portion to form a first insulating layer; S3. A second insulating layer is formed by weaving on the surface of the first insulating layer; S4. Applying a coating on the surface of the second insulating layer to form a protective layer; S5. bending the conductive portion to form a battery high voltage connector; In step S2, the temperature is 248-255° C. and the temperature is 1.2-2.2 minutes. The conductive part is made of copper or aluminum, and is formed by bending; when the conductive part is made of copper, the conductive part is a copper bar; when the conductive part is made of aluminum, the conductive part is an aluminum bar.

2. The novel fireproof, high temperature resistant and insulated battery high voltage connector according to claim 1 is characterized in that: The second insulating layer is glass fiber, and is arranged on the outer surface of the first insulating layer by weaving.

3. A manufacturing process for manufacturing the novel fireproof, high temperature resistant and insulated battery high voltage connector according to claim 1, characterized in that: The following steps are involved: S1. Preparation of ceramic silicone rubber; S2. Extruding ceramic silicone rubber on the conductive portion to form a first insulating layer; S3. A second insulating layer is formed by weaving on the surface of the first insulating layer; S4. Applying a coating on the surface of the second insulating layer to form a protective layer; S5. bending the conductive portion to form a battery high voltage connector; In step S2, the temperature is 248-255° C. and the temperature is 1.2-2.2 minutes. The conductive part is made of copper or aluminum, and is formed by bending; when the conductive part is made of copper, the conductive part is a copper bar; when the conductive part is made of aluminum, the conductive part is an aluminum bar.

4. The manufacturing process of the novel fireproof, high temperature resistant and insulated battery high voltage connector according to claim 3 is characterized in that: Ceramic silicone rubber is mainly composed of component A and component B in a weight ratio of 0.8-1.2:1, wherein component A includes the following raw materials in parts by weight: Silicone rubber A 60-140 parts Reinforcing agent 35-45 parts Filler A 60-100 parts Silane additive A11.4-17.2 parts Lubricant A 0.15-0.25 parts Flame retardant 0.1-0.3 parts Vulcanizing agent 0.5-1.5 parts; Component B includes the following raw materials in parts by weight: Silicone rubber B 60-140 parts Filler B 230-290 parts Silane additive B 3-6 parts Lubricant B 0.2-0.4 parts.

5. The manufacturing process of the novel fireproof, high temperature resistant and insulating battery high voltage connector according to claim 3 is characterized in that: Step S1 specifically includes: (I) Preparation of component A: S11, first put the raw material silicone rubber A into the internal mixer and stir for 4-6 minutes; S12, adding lubricant A and part of reinforcing agent and filler A, and then adding silane additive A; S13, after mixing the part of reinforcing agent and filler A to be added, add the remaining reinforcing agent and filler A in five times; S14, after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a mixed rubber; S15, discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it to stand by; (II) Preparation of component B: S11), first put the raw material silicone rubber B into the internal mixer and stir for 4-6 minutes; S12), adding lubricant B and part of filler B, and then adding silane additive B; S13), after the part of filler B to be added is mixed evenly, the remaining filler B is added in five portions; S14), after the above raw materials are mixed into agglomerates, the temperature is raised to refine the rubber to obtain a rubber mix; S15), discharging the mixed rubber, putting it into an open mill for even mixing, lowering the roller, and leaving it for standby; (III) Preparation of ceramic fire-resistant and flame-retardant silicone rubber: (S11), putting component A and component B into an open mill in proportion and mixing them evenly, adding a flame retardant, passing them through a thin roller five times, putting them into a filter, filtering them with a 150-mesh filter screen, and obtaining a mixed rubber; (S12), adding a vulcanizing agent to the rubbed rubber and mixing it evenly, and then putting it into a mold for vulcanization molding.

6. The manufacturing process of the novel fireproof, high temperature resistant and insulating battery high voltage connector according to claim 5 is characterized in that: The step (S12) is prepared by vulcanizing at a temperature of 218-222°C and a pressure of 0.02 atmosphere for 8 hours.

7. The manufacturing process of the novel fireproof, high temperature resistant and insulated battery high voltage connector according to claim 3 is characterized in that: In step S4, the coating is silicone resin or Teflon solution, and step S4 is completed within 4.5-5.5 minutes at a temperature of 195-205°C.

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