Environment-friendly immersed single-phase cooling liquid easy and convenient to manufacture

Abstract

The invention provides an immersed single-phase cooling liquid. The immersed single-phase cooling liquid comprises the following components: 50-70 parts of base oil, 30-50 parts of a flame retardant and 10-20 parts of an antioxidant, the flame retardant is one or more of an organic silicon flame retardant, an inorganic silicon flame retardant or an organic silicon nano composite material. The obtained immersed single-phase cooling liquid has good flame retardance, high insulativity, low-temperature fluidity, heat conductivity and material compatibility. And the method can be widely applied to the fields of industrial production, electronic equipment cooling, power equipment cooling and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of battery safety, and in particular to a battery immersion coolant. Background Art

[0002] As the core of the immersion battery thermal management system, the thermophysical properties of the coolant largely determine its application in data centers and PC systems. The immersion coolant should have excellent insulation properties, excellent thermal conductivity, no solidification or combustion within the operating temperature range, and be compatible with the materials of data centers and PC systems.

[0003] Based on cost considerations, existing immersion coolants often use hydrocarbons and conventional silicone oils as cooling oils. Although these substances have good insulation properties, their flash points and ignition points are relatively low, and the safety of the energy storage system is difficult to ensure, which affects the development of immersion liquid cooling energy storage technology.

[0004] Therefore, in order to ensure the safety of the energy storage system, it is urgent to provide a coolant that can meet the thermal management requirements. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an immersion single-phase cooling liquid that can be applied to data centers and PC systems.

[0006] An immersion single-phase coolant comprises the following components: 50-70 parts of base oil, 30-50 parts of flame retardant and 10-20 parts of antioxidant; The flame retardant is one or more of an organic silicon flame retardant, an inorganic silicon flame retardant or an organic silicon nanocomposite material.

[0007] The base oil is one or more of dimethyl silicone oil, diethyl silicone oil, phenyl methyl silicone oil or amino methyl silicone oil; wherein the viscosity of the base oil is 20-100 cst.

[0008] The organosilicon flame retardant is one or more of FCA117 or DC8008; The inorganic silicon flame retardant is magnesium aluminum silicate flame retardant.

[0009] The organosilicon nanocomposite material is 40-001 Additive.

[0010] The antioxidant is a polyphenol hindered phenol antioxidant, preferably one or more of antioxidant 3224, antioxidant 3125 or antioxidant 330.

[0011] Preferably, the coolant comprises the following components: 55-65 parts of base oil, 40-45 parts of flame retardant and 10-15 parts of antioxidant.

[0012] A method for preparing an immersion single-phase coolant comprises mixing a base oil, a flame retardant and an antioxidant to obtain a uniform liquid under heating and stirring conditions.

[0013] The heating temperature is 60-90° C., the stirring speed is 800-1500 r / min, and the stirring time is 4-8 h.

[0014] Methyl silicone oil can be used as insulating cooling oil due to its good insulation properties, but its heat dissipation and flame retardancy are poor, so the safety performance of methyl silicone oil can be improved by introducing flame retardants. However, traditional flame retardants have poor compatibility with methyl silicone oil, or even if the compatibility is good, the thermal physical properties of methyl silicone oil will be significantly deteriorated. The inventors found that the flame retardant selected in the present invention has better compatibility with methyl silicone oil, can give methyl silicone oil good flame retardancy, and will not significantly deteriorate the thermal physical properties of methyl silicone oil. The present invention uses a new type of high-efficiency, low-toxic, anti-drip, environmentally friendly flame retardant, which is commonly used in the flame retardancy of PC materials, but has not been used in the flame retardancy of immersion coolants. Therefore, the scheme of the present invention is not easy to think of. In the present invention, the reason why the silicone flame retardant can play a role may be because it achieves its flame retardant effect through the condensed phase flame retardant mechanism, that is, by generating a cracked carbon layer and improving the antioxidant property of the carbon layer. During the combustion process, the organosilicon flame retardant will migrate to the surface of the material to form a carbon layer rich in organosilicon flame retardants. This carbon layer will generate an inorganic oxygen-isolating and heat-insulating protective layer containing Si bonds and Si-C bonds at high temperatures, thereby preventing the escape of combustion decomposition products. It can also act as a heat-insulating and oxygen-isolating layer, effectively preventing the thermal decomposition reaction of the material, and achieving the purpose of flame retardancy, low smoke, and low toxicity.

[0015] The immersion single-phase coolant of the present invention has high flame retardancy, high insulation, good low-temperature fluidity, and good heat transfer performance, and can effectively inhibit the occurrence of thermal runaway in data centers and PC systems, reduce the hazards caused by thermal runaway in data centers and PC systems, and improve safety.

[0016] The beneficial effects of the present invention are: By selecting a suitable flame retardant, not only is the insulating cooling oil given good flame retardancy, but it also has good compatibility with the insulating cooling oil. While improving the flame retardancy of the insulating cooling oil, the physical and chemical properties of the insulating cooling oil are further optimized and improved. The immersion single-phase coolant of the present invention has the advantages of good flame retardancy, high insulation, low-temperature fluidity, heat transfer performance, etc., and can effectively inhibit the occurrence of thermal runaway in data centers and PC systems and reduce the hazards caused by thermal runaway. Moreover, the preparation process of the present invention is simple, low-cost, easy to mass produce, and has good application prospects. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased through regular channels.

[0019] In the following examples, unless otherwise specified, the parts are by mass. The kinematic viscosity of the dimethyl silicone oil used at 25°C is 30 mm 2 / s, the kinematic viscosity of phenyl methyl silicone oil at 25°C is 50 mm 2 / s, the kinematic viscosity of vinyl silicone oil at 25°C is 30 mm 2 / s.

[0020] Example 1 70 parts of phenyl methyl silicone oil, 30 parts of FCA117 and 10 parts of antioxidant 3224 were weighed and blended, and stirred and mixed at 100° C. and a stirring speed of 1000 r / min for 4 hours to obtain an immersion single-phase coolant.

[0021] Example 2 70 parts of phenyl methyl silicone oil, 30 parts of magnesium aluminum silicate flame retardant, and 15 parts of antioxidant 3224 were weighed and blended, and stirred and mixed at 100° C. and a stirring speed of 1000 r / min for 4 hours to obtain an immersion single-phase coolant.

[0022] Example 3 60 parts of phenyl methyl silicone oil, 30 parts of 40-001 Additive, and 10 parts of antioxidant 3224 were weighed and blended, and stirred and mixed at 100° C. and a stirring speed of 1000 r / min for 5 hours to obtain an immersion single-phase coolant.

[0023] Example 4 70 parts of dimethyl silicone oil, 30 parts of FCA117 and 10 parts of antioxidant 3224 were weighed and blended, and stirred and mixed at 100° C. and a stirring speed of 1000 r / min for 4 hours to obtain an immersion single-phase coolant.

[0024] Example 5 Weigh 60 parts of phenyl methyl silicone oil, 40 parts of DC8008, and 10 parts of antioxidant 3125, blend them, and stir and mix them at 100° C. and a stirring speed of 1000 r / min for 4 hours to obtain an immersion single-phase coolant.

[0025] Example 6 Weigh 60 parts of phenyl methyl silicone oil, 20 parts of DC8008, 20 parts of FCA117, and 10 parts of antioxidant 3125, blend them, and stir and mix them at 120° C. and a stirring speed of 1200 r / min for 4 hours to obtain an immersion single-phase coolant.

[0026] Example 7 60 parts of phenylmethyl silicone oil, 40 parts of DC8008 and 10 parts of antioxidant 330 were weighed and blended, and stirred and mixed at 80° C. and a stirring speed of 1000 r / min for 4 hours to obtain an immersion single-phase coolant.

[0027] Comparative Example 1 80 parts of dimethyl silicone oil, 20 parts of FCA117 and 10 parts of antioxidant 3224 were weighed and blended, and stirred and mixed for 4 hours at a temperature of 100° C. and a stirring speed of 1000 r / min to obtain an immersion single-phase coolant.

[0028] Comparative Example 2 DOWSIL ICL-1000 silicone oil coolant is commercially available.

[0029] Comparative Example 3 70 parts of vinyl silicone oil, 30 parts of FCA117 and 10 parts of antioxidant 3224 were weighed and blended, and stirred and mixed for 4 hours at a temperature of 100° C. and a stirring speed of 1000 r / min to obtain an immersion single-phase coolant.

[0030] Performance test: The coolants prepared in the above embodiments and comparative examples were tested for physical and chemical properties and safety performance.

[0031] Physical and chemical performance test: Referring to the test methods of GB2536 and GB / T507, the physical and chemical performance test of the coolant involved in the present invention was carried out. The results are shown in Table 1.

[0032] Table 1 Physical and chemical properties test results of embodiments and comparative examples

[0033] Through physical and chemical property tests, it can be found that the coolant provided by the present invention has excellent flame retardant properties, is difficult to burn or non-flammable, and has good insulation properties.

Claims

1. An immersion single-phase coolant, characterized in that: The composition comprises the following components: 50-70 parts of base oil, 30-50 parts of flame retardant and 10-20 parts of antioxidant; The flame retardant is one or more of an organic silicon flame retardant, an inorganic silicon flame retardant or an organic silicon nanocomposite material.

2. The immersion type single-phase coolant according to claim 1, characterized in that: The base oil is one or more of dimethyl silicone oil, diethyl silicone oil, phenyl methyl silicone oil or amino methyl silicone oil; wherein the viscosity of the base oil is 20-100 cst.

3. The immersion type single-phase coolant according to claim 1, characterized in that: The organosilicon flame retardant is one or more of FCA117 and DC8008.

4. The immersion type single-phase coolant according to claim 1, characterized in that: The inorganic silicon flame retardant is magnesium aluminum silicate flame retardant.

5. The immersion type single-phase coolant according to claim 1, characterized in that: The organosilicon nanocomposite material is 40-001 Additive.

6. The immersion type single-phase coolant according to claim 1, characterized in that: The antioxidant is a polyphenol hindered phenol antioxidant, preferably one or more of antioxidant 3224, antioxidant 3125 or antioxidant 330.

7. The immersion type single-phase coolant according to claim 1, characterized in that: The invention comprises the following components: 55-65 parts of base oil, 40-45 parts of flame retardant and 10-15 parts of antioxidant.

8. The method for preparing an immersion single-phase coolant according to any one of claims 1 to 7, characterized in that: The base oil, flame retardant and antioxidant are blended to obtain a uniform liquid under heating and stirring conditions.

9. The method for preparing an immersion single-phase coolant according to claim 8, characterized in that: The heating temperature is 60-90°C, the stirring speed is 800-1500r / min, and the stirring time is 4-8h.

Images