Vegetable-based insulating oil immersion cooling liquid for electronic component and device

Abstract

To provide a vegetable-based insulating oil immersion cooling liquid for electronic component and device that effectively reduce the viscosity of vegetable-based insulating oil and improve its fluidity.SOLUTION: The vegetable-based insulating oil immersion cooling liquid for electronic component and device includes a base oil including vegetable-based insulating oil and a viscosity reduction additive that includes one or more combinations of a polyorganosiloxane compound, a silicon-based phosphate compound, and a silicon-based phosphite compound and has a viscosity of 0.02 mm2 / s to 1.05 mm2 / s.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present application relates to the field of liquid cooling technology for electronic components and devices, and in particular to a vegetable insulating oil-based immersion cooling fluid for electronic components and devices. [Background technology]

[0002] Electronic components and devices is a general term for electronic components and devices and can include resistors, capacitors, inductors, semiconductor isolation devices, electroacoustic devices, laser devices, optoelectronic devices, sensors, power supplies, integrated circuits, CPUs, printed circuit boards, etc.

[0003] With the development of IT technology, heat dissipation of electronic components and devices such as CPUs, motherboards, memory sticks, hard disks, power supplies, and printed circuit boards is becoming increasingly important. In particular, the current share of lithium-ion batteries in the energy storage market is constantly increasing, and it is extremely important to improve the life and safety of lithium-ion battery energy storage systems. Lithium-ion battery energy storage systems have large power and heat generation, and the batteries are densely arranged and the heat dissipation space is limited, making it difficult to dissipate heat quickly and uniformly, which is likely to cause phenomena such as heat accumulation between battery packs and excessive operating temperature, thereby compromising the life and safety of the batteries.

[0004] Compared with air cooling, liquid cooling, especially immersion liquid cooling, has the characteristics of large heat transfer, low flow resistance, and high heat exchange efficiency, and is widely used in the heat dissipation technology field of electronic components and devices. For example, in the conventional technology, vegetable insulating oil has good heat transfer effect, is insulating, has high ignition point and flash point, and has a high biodegradability of more than 95%, so it is mainly used for liquid cooling of high-voltage equipment such as oil-immersed insulated transformers, but is rarely used in lithium-ion battery energy storage systems, mainly because the main component of vegetable insulating oil is triglyceride, which is prone to hydrolysis and deteriorates its insulating performance. Therefore, it is particularly important to develop a highly stable immersion cooling liquid that can be applied to lithium-ion battery energy storage systems. Summary of the Invention [Problem to be solved by the invention]

[0005] Based on this, there is a need to provide a vegetable insulating oil-based immersion coolant for electronic components and devices to solve the problems in the prior art that vegetable insulating oil has high viscosity, poor fluidity, and is prone to hydrolysis, which are disadvantageous for application to lithium-ion battery energy storage systems. [Means for solving the problem]

[0006] The present application relates to a vegetable insulating oil-based immersion coolant for electronic components and devices, the coolant comprising a base oil containing vegetable insulating oil and one or more combinations of a polyorganosiloxane-based compound, a silicon phosphate-based compound, and a silicon phosphite-based compound, and the viscosity of the coolant is 0.02 mm. 2 / s~1.05mm 2 and a viscosity reducing additive, wherein the viscosity reducing additive is 0.1 to 0.25% by mass.

[0007] In a possible embodiment, the vegetable insulating oil comprises one or more combinations of FR3 vegetable insulating oil, NP vegetable insulating oil, RDB vegetable insulating oil, VinsOil vegetable insulating oil, BIOTEMP vegetable insulating oil, MIDEL vegetable oil, and PFAE vegetable insulating oil.

[0008] In a possible embodiment, the polyorganosiloxane-based compound comprises one or more combinations of dimethyldimethoxysilane, methyltrimethoxysilane, dimethylsiloxane, low-polymerized dimethylsiloxane, trimethylsilane, trimethoxysilane, pentamethyldisiloxane, and methoxytriethyleneoxypropyltrimethoxysilane; and / or The silicon-based phosphate-based compound includes one or a combination of two of tris(trimethylsilyl)phosphate and bis(trimethylsilylated vinyl phosphate; and / or The silicon-based phosphite-based compound includes one or more combinations of mono(trimethylsilyl)phosphite, tris(trimethylsilyl)phosphite, and diethyltrimethylsilylphosphite.

[0009] In a possible embodiment, the immersion cooling liquid further comprises an inorganic thermally conductive filler which is an insulating filler.

[0010] In a possible embodiment, the inorganic thermally conductive filler comprises a combination of at least one of boron nitride, aluminum nitride, silicon nitride, silicon oxide, aluminum oxide, zinc oxide, and magnesium oxide.

[0011] In a possible embodiment, in the immersion coolant, the weight percentage of the base oil is between 50% and 90%, the weight percentage of the decane-based additive is between 10% and 50%, and the weight percentage of the inorganic thermally conductive filler is between 1% and 10%.

[0012] In a possible embodiment, the electronic component / device is a lithium ion battery.

[0013] In a possible embodiment, the immersion cooling liquid is prepared by mixing and stirring the components contained therein.

[0014] In a possible embodiment, the stirring time is between 2 h and 5 h. Effect of the Invention

[0015] The beneficial effects of vegetable insulating oil based immersion coolant for the above electronic components and devices are as follows: By adding one or a combination of polyorganosiloxane compounds, silicon phosphate compounds, and silicon phosphite compounds to vegetable insulating oil, the viscosity of these viscosity reducing additives is reduced to 0.02 mm. 2 / s~1.05mm 2 / s, these viscosity reducing additives can effectively reduce the viscosity of vegetable insulating oil and improve its fluidity, thereby improving the heat transfer and heat conduction effect of the immersion coolant. Meanwhile, these viscosity reducing additives contain siloxane bonds, and the presence of siloxane bonds can remove moisture from the immersion coolant, thereby improving the stability of the immersion coolant and reducing problems such as hydrolysis of vegetable insulating oil and deterioration of insulating performance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] In order to make the above-mentioned objects, features and advantages of the present application more clearly understandable, specific embodiments of the present application are described in detail below. In the following description, many specific details are described in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the content of the present application. Therefore, the present application is not limited to the specific examples disclosed below.

[0017] Unless otherwise required by context, the term "comprises" is interpreted in an open and inclusive sense throughout the specification and claims, i.e., "including but not limited to." In the description herein, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "exemplary," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. General expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, a particular feature, structure, material, or characteristic described above may be included in any one or more embodiments or examples in any suitable manner.

[0018] "A and / or B" includes the three combinations of A only, B only, and a combination of A and B.

[0019] In this specification, unless otherwise specified, "one or more" means one or more than one.

[0020] In this specification, the terms "for example," "such as," "example," "examples," and the like are for explanatory purposes and indicate that there is a relationship between the covered contents of the prior art solution and the subsequent art solution, but should not be understood as a limitation on the prior art solution, and should not be understood as a limitation on the scope of protection of this specification. In this specification, unless otherwise stated, "A (for example, B)" indicates that B is a non-limiting example of A, and it can be understood that A is not limited to B.

[0021] In this specification, "selectable", "selectable" and "selectable" refer to something that may or may not exist, that is, to be selected from either of two parallel solutions, "existence" or "absence". When there are multiple "options" in one technical solution, each "option" is independent of the other, unless otherwise specified and unless there is a contradiction or mutual constraint.

[0022] In this specification, the terms "optionally include" and "optionally include" mean "include or not include." "Optionally, component X" indicates that component X is present or absent, or that component X is included or not included.

[0023] In this specification, the terms "first", "second", etc. in "first embodiment", "second embodiment", etc. are merely descriptive and should not be understood as indicating or suggesting relative importance or number, nor should they be understood as suggesting the importance or number of the technical features indicated.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application pertains. The terms used in the present application specification are only for the purpose of describing specific examples and are not intended to limit the present application.

[0025] In this specification, technical features described in an open format include closed technical solutions consisting of the recited features, and also include open technical solutions including the recited features.

[0026] In this specification, for a numerical interval (i.e., a numerical range), unless otherwise stated, the distribution of selectable numerical values ​​within the numerical interval is considered to be continuous and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, as well as each numerical value between the two numerical endpoints. Unless otherwise stated, when a numerical interval refers only to integers within the numerical interval, it includes the two endpoint integers of the numerical range, as well as each integer between the two endpoints, and is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe a feature or characteristic, the numerical ranges may be combined. In other words, unless otherwise stated, a numerical range disclosed herein should be understood to include any and all subranges contained therein. The "numerical value" in the numerical interval may be any quantitative value, such as a number, a percentage, a ratio, etc. A "numerical interval" can broadly include numerical interval types such as percentage intervals, proportion intervals, and ratio intervals.

[0027] In this specification, unless otherwise specified, the temperature parameters include both constant temperature processing and processing in a constant temperature range. The constant temperature processing allows temperature fluctuations within the precision range of equipment control.

[0028] In the present specification, the term "room temperature" or "normal temperature" generally refers to 4°C to 35°C, for example, 20°C ± 5°C. In some examples herein, "room temperature" or "normal temperature" refers to 10°C to 30°C. In some examples herein, "room temperature" or "normal temperature" refers to 20°C to 30°C.

[0029] In this specification, unless otherwise specified, all percentage concentrations refer to final concentrations. The final concentration is the ratio of an added component to a system to which the component is added.

[0030] Energy storage, as an energy buffer in the power system, can realize the time-space transfer and transformation of energy through the rapid absorption, storage and release of energy, and can alleviate the challenges of randomness, intermittency and variability faced by the development of renewable energy. The large-capacity lithium-ion battery energy storage system is of great significance to the efficient use of new energy and the improvement of traditional power grids. As the occupancy rate of lithium-ion batteries in the energy storage market increases, it is extremely important to improve the life and safety of the lithium-ion battery energy storage system. The lithium-ion battery energy storage system has a large power and heat generation amount, and the battery arrangement is dense and the heat dissipation space is limited, so that the heat is difficult to be released quickly and uniformly, which is easy to cause phenomena such as heat accumulation between battery packs and excessive operating temperature, which will impair the life and safety of the battery. Thermal management of batteries is a key factor in ensuring the continuous safe operation of energy storage systems. By controlling the temperature inside the energy storage system to the optimum temperature for lithium battery operation (10 to 35°C) and ensuring temperature uniformity inside the battery pack, the risk of battery life degradation and thermal runaway is reduced, and the system plays an important role in the safety, efficiency, lifespan, and performance of energy storage.

[0031] At present, the main technical means of energy storage thermal management are air cooling and liquid cooling. Air cooling technology uses gas as a cooling medium to reduce the temperature of the battery through convection, and has the advantages of simple structure, easy maintenance, and low cost, but poor heat dissipation efficiency, heat dissipation rate and temperature uniformity, which are mainly seen in energy storage base stations and other places with small charge, small power density and low heat generation rate. Liquid cooling uses liquid as a cooling medium and removes heat generated by the battery through convection and heat exchange. Currently, the most common media are water, ethylene glycol or aqueous solution, fluorinated liquid and insulating oil. Overall, the liquid cooling system has a high heat exchange coefficient, large specific heat capacity and fast cooling speed. With the demand for larger battery capacity and higher system power density for new energy plants and off-net energy storage in the future, the occupancy rate of liquid cooling technology will rise quickly. There are three common liquid cooling methods: cold plate, spray, and immersion. Immersion liquid cooling is a new, highly efficient, environmentally friendly, and energy-saving thermal management technology in which heat-generating electronic components are directly immersed in cooling liquid, and the cooling liquid comes into direct contact with the electronic components to exchange heat and remove it.

[0032] In order to realize the transition of immersion liquid cooling technology to large-capacity high-power energy storage battery systems, oil immersion liquid cooling technology using insulating oil as a cooling medium has been rapidly developed, immersing the entire battery pack in the cooling liquid, realizing ultra-low area temperature difference (±2°C) through liquid circulation, reducing the risk of thermal runaway of cells from the heat source, and extending the circulation life of the battery. It also completely isolates the battery system from the air, for example, some cells will not burn easily when thermal runaway occurs, and the flame-retardant cooling liquid can promote circulation to take away local heat, prevent the combustion explosion of the battery cluster, improve the safety of the energy storage system, and reduce losses. The widespread application of oil immersion liquid cooling technology to energy storage batteries still faces many problems, especially the cooling liquid that is in direct and continuous contact with the cells, which directly affects the use effect of the oil immersion liquid cooling system due to its characteristics.

[0033] Vegetable insulating oil has good heat transfer effect, is insulating, has high ignition point and flash point, and has a high biodegradability rate of more than 95%, making it a potential candidate for the cooling fluid of environmentally friendly immersion liquid cooling technology. At present, vegetable insulating oil is mainly used in high-voltage equipment such as oil-immersed insulated transformers, but has little application in the thermal management of lithium-ion battery energy storage. The main component of vegetable insulating oil is triglyceride, which is prone to hydrolysis reaction. Research has found that as hydrolysis progresses, the insulation breakdown voltage of vegetable insulating oil decreases, the dielectric loss factor increases, and the insulation performance deteriorates. In addition, the viscosity of vegetable insulating oil itself is high, which affects the fluidity and affects the heat transfer effect of the cooling fluid. Therefore, when vegetable insulating oil is applied to the cooling fluid of immersion liquid cooling battery energy storage, it is urgent to solve the important problems of viscosity and water content.

[0034] Based on the above, according to a first aspect, some embodiments of the present application provide a vegetable insulating oil-based immersion coolant for electronic components and devices, the immersion coolant including a base oil and a viscosity reducing additive, wherein the base oil includes a vegetable insulating oil, the viscosity reducing additive includes one or more of a polyorganosiloxane-based compound, a silicon-based phosphate-based compound, and a silicon-based phosphite-based compound, and the viscosity reducing additive has a viscosity of 0.02 mm or less. 2 / s~1.05mm 2 / s.

[0035] The vegetable insulating oil has ester groups, and the oxygen atoms in the ester groups can form hydrogen bonds with water, which gives the vegetable oil a high water absorption capacity. As a result, water from electronic components and devices can be absorbed into the vegetable oil without affecting their properties.

[0036] A polyorganosiloxane compound is a polymer that contains Si-O-Si bonds as its main chain structure, and such polymers have characteristics such as high temperature resistance, low temperature resistance, oxidation resistance, low viscosity coefficient, shear resistance, low vapor pressure, low surface tension, water repellency, antifoaming properties, demoldability, electrical insulation, and physiological inactivity.

[0037] Silicon phosphate compounds have excellent properties such as good thermal stability, wear resistance, and chemical resistance.

[0038] In the immersion coolant provided in the examples of the present application, by adding one or more combinations of polyorganosiloxane-based compounds, silicon-based phosphate-based compounds, and silicon-based phosphite-based compounds to vegetable insulating oil, the viscosity of these viscosity reducing additives is reduced to 0.02 mm. 2 / s~1.05mm 2 / s, these viscosity reducing additives can effectively reduce the viscosity of vegetable insulating oil and improve its fluidity, thereby improving the heat transfer and heat conduction effect of the immersion coolant. Meanwhile, these viscosity reducing additives contain siloxane bonds, and the presence of siloxane bonds can remove moisture from the immersion coolant, thereby improving the stability of the immersion coolant and reducing problems such as hydrolysis of vegetable insulating oil and deterioration of insulating performance.

[0039] Furthermore, compared to polyorganosiloxane-based compounds, silylphosphonate-based compounds and silicon phosphite-based compounds also have a flame retardant effect, which can further improve the stability of the immersion cooling liquid.

[0040] In some embodiments, the vegetable insulating oil comprises one or more combinations of FR3 vegetable insulating oil, NP vegetable insulating oil, RDB vegetable insulating oil, VinsOil vegetable insulating oil, BIOTEMP vegetable insulating oil, MIDEL vegetable oil, and PFAE vegetable insulating oil.

[0041] In some embodiments, the polyorganosiloxane-based compound includes one or more combinations of dimethyldimethoxysilane, methyltrimethoxysilane, dimethylsiloxane, low-polymerized dimethylsiloxane, trimethylsilane, trimethoxysilane, pentamethyldisiloxane, and methoxytriethyleneoxypropyltrimethoxysilane.

[0042] In some embodiments, the silicon-based phosphate-based compound includes a combination of one or two of tris(trimethylsilyl) phosphate and bistrimethylsilylated vinyl phosphate.

[0043] In some embodiments, the silicon-based phosphite-based compound includes a combination of one or more of mono(trimethylsilyl)phosphite, tris(trimethylsilyl)phosphite, and diethyltrimethylsilylphosphite.

[0044] In some embodiments, the immersion cooling fluid further comprises an inorganic thermally conductive filler that is an insulating filler.

[0045] In these embodiments, the thermal conductivity and heat transfer effectiveness of the immersion cooling fluid can be further improved by adding inorganic thermally conductive fillers.

[0046] In some embodiments, the inorganic thermally conductive filler comprises a combination of at least one of boron nitride, aluminum nitride, silicon nitride, silicon oxide, aluminum oxide, zinc oxide, and magnesium oxide.

[0047] In these embodiments, these inorganic thermally conductive fillers have good heat conduction and heat transfer effects.

[0048] If the viscosity reducing additive is not added to the vegetable insulating oil, aluminum oxide, as a polar medium, increases the medium loss and viscosity of the vegetable insulating oil, which is disadvantageous for application to the immersion liquid cooling technology. In these embodiments, the viscosity of the vegetable insulating oil can be reduced by adding a viscosity reducing additive to the vegetable insulating oil, while when a polar medium such as aluminum oxide is used as an inorganic thermally conductive filler, the medium loss and viscosity increase of the vegetable insulating oil caused by using aluminum oxide as a polar medium can be offset, which is advantageous for application of the vegetable insulating oil to the immersion liquid cooling technology.

[0049] In some embodiments, the immersion coolant has a weight percentage of base oil between 50% and 90%, a weight percentage of viscosity reducing additive between 10% and 50%, and a weight percentage of inorganic thermally conductive filler between 1% and 10%.

[0050] In some embodiments, the electronic component / device is a lithium ion battery.

[0051] In these embodiments, the submersion coolant can be successfully applied in large scale energy storage applications to provide liquid cooling for lithium ion batteries.

[0052] In some embodiments, the immersion cooling fluid is prepared by mixing and stirring the components contained therein.

[0053] In these examples, the components of the immersion coolant are mixed and stirred to uniformly mix the base oil, viscosity reducing additive, and inorganic thermally conductive filler contained in the immersion coolant, thereby improving the uniformity of the immersion coolant cooling.

[0054] In some embodiments, the stirring time is 2 to 5 hours.

[0055] In these examples, a uniform immersion cooling liquid can be produced by controlling the stirring time within the above range.

[0056] According to a second aspect, some embodiments of the present application provide an application of the submersion cooling liquid according to the first aspect in a liquid cooling system.

[0057] In some embodiments, a liquid cooling system is integrated with a lithium-ion battery pack and can provide a high flow rate of immersion cooling liquid to contact the battery pack or multiple battery modules and circulate the liquid to dissipate heat from the battery pack or redistribute heat between the battery modules.

[0058] In order to objectively evaluate the technical effects of the embodiments of the present application, the present application is illustrated in detail in the following examples and comparative examples.

[0059] In the following examples and comparative examples, all the raw materials are commercially available, and in order to maintain the reliability of the experiments, the raw materials used in the following examples and comparative examples all have the same physical and chemical parameters or are produced by the same processing methods.

[0060] Example 1 The immersion coolant provided in Example 1 includes FR3 vegetable insulating oil and dimethyldimethoxysilane, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 90% and the mass percentage of dimethyldimethoxysilane is 10%. The above components are mechanically stirred at room temperature for 2 h to be homogenized to obtain the immersion coolant.

[0061] Example 2 The immersion coolant provided in Example 2 includes FR3 vegetable insulating oil and dimethyldimethoxysilane, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 80%, and the mass percentage of dimethyldimethoxysilane is 20%. The above components are mechanically stirred at room temperature for 2 h to be homogenized, to obtain the immersion coolant.

[0062] Example 3 The immersion coolant provided in Example 3 includes FR3 vegetable insulating oil and dimethyldimethoxysilane, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 50%, and the mass percentage of dimethyldimethoxysilane is 50%. The above components are mechanically stirred at room temperature for 2 h to be homogenized to obtain the immersion coolant.

[0063] Example 4 The immersion coolant provided in Example 4 includes FR3 vegetable insulating oil and dimethyldimethoxysilane, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 60%, and the mass percentage of dimethyldimethoxysilane is 40%. The above components are mechanically stirred at room temperature for 2 h to be homogenized to obtain the immersion coolant.

[0064] Example 5 The immersion coolant provided in Example 5 includes FR3 vegetable insulating oil and tris(trimethylsilyl)phosphate, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 50% and the mass percentage of tris(trimethylsilyl)phosphate is 50%. The above components are mechanically stirred at room temperature for 2 h to be homogenized to obtain the immersion coolant.

[0065] Example 6 The immersion coolant provided in Example 6 includes FR3 vegetable insulating oil, dimethyldimethoxysilane, and boron nitride, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 70%, the mass percentage of dimethyldimethoxysilane is 20%, and the mass percentage of boron nitride is 10%. The above components are mechanically stirred at room temperature for 5 h to be homogenized, to obtain the immersion coolant.

[0066] Example 7 The immersion coolant provided in Example 7 includes FR3 vegetable insulating oil, dimethyldimethoxysilane, and boron nitride, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 74%, the mass percentage of dimethyldimethoxysilane is 25%, and the mass percentage of boron nitride is 1%. The above components are mechanically stirred at room temperature for 5 h to be homogenized, to obtain the immersion coolant.

[0067] Example 8 The immersion coolant provided in Example 8 includes FR3 vegetable insulating oil, dimethyldimethoxysilane, and tris(trimethylsilyl)phosphate, and calculated by mass percentage, the mass percentage of FR3 vegetable insulating oil is 70%, the mass percentage of dimethyldimethoxysilane is 25%, and the mass percentage of tris(trimethylsilyl)phosphate is 5%. The above components are mechanically stirred at room temperature for 2 h to be homogenized, to obtain the immersion coolant.

[0068] Comparative Example 1 FR3 vegetable insulating oil was used as the immersion coolant.

[0069] The immersion coolants obtained in Examples 1 to 7 and Comparative Example 1 were subjected to performance tests.

[0070] Thermal conductivity tests were conducted in accordance with ASTM D7896 "Standard Test Method for Thermal Conductivity, Thermal Diffusivity and Volumetric Heat Capacity of Engine Coolants and Related Fluids by Transient Hot-Wire Liquid Thermal Conductivity Method" to verify heat transfer performance; electrical conductivity tests were conducted in accordance with GB / T 6682 "Standards and Test Methods for Water Use in Analytical Laboratories" to verify insulation performance; and kinematic viscosity tests were conducted in accordance with GB / T 265 "Methods for Measuring and Calculating Kinematic Viscosity of Petroleum Products".

[0071] The test results are shown in Table 1 below.

[0072] [Table 1]

[0073] From the above test results, the following conclusions can be drawn: (1) Comparing the original FR3 vegetable insulating oil and Example 1, the immersion coolant in Example 1 has a lower viscosity, which shows that the polyorganosiloxane compound can effectively reduce the viscosity of the vegetable insulating oil, increase the fluidity of the immersion coolant, and is favorable for reducing power consumption. (2) Comparing Example 1, Example 2, Example 3 and Example 4, as the content of vegetable insulating oil decreases, the viscosity of the immersion cooling liquid gradually decreases, but as the content of viscosity-reducing additive increases, the thermal conductivity of the immersion cooling liquid decreases. (3) Comparing Example 3 with Example 5, when a silicon-based phosphate-based compound was used instead of a polyorganosiloxane-based compound, the properties of the immersion coolant did not change significantly, indicating that the silicon-based phosphate-based compound could partially replace the functions of the polyorganosiloxane-based compound. (4) Comparing Example 3, Example 6, Example 7 and Example 8, it was shown that the addition of an inorganic thermally conductive filler (e.g., boron nitride) can significantly increase the thermal conductivity of the immersion coolant, but the addition of an excessive amount of inorganic thermally conductive filler has a serious effect on the viscosity of the immersion coolant, and the balance between the viscosity and thermal conductivity of the coolant cannot be achieved unless an appropriate amount of inorganic thermally conductive filler is added.

[0074] As described above, the present application provides an immersion coolant mainly composed of vegetable insulating oil. By adding a viscosity reducing additive to the vegetable insulating oil, the viscosity reducing additive has a relatively low viscosity, which can reduce the viscosity of the immersion coolant, and on the other hand, the viscosity reducing additive contains a siloxane bond, which can remove free water in the immersion coolant, and further improve the stability of the immersion coolant. In addition, by adding an inorganic thermally conductive filler, the thermal conductivity of the immersion coolant can be effectively improved while reducing the content of the vegetable insulating oil, and the viscosity and thermal conductivity of the immersion coolant can be balanced by rationally setting the amount of the inorganic thermally conductive filler and the viscosity reducing additive added.

[0075] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as no contradiction occurs in the combination of these technical features, they should be considered to be within the scope of the present specification.

[0076] The above examples only show some embodiments of the present application, and the description is more specific and detailed, but cannot be understood as limiting the scope of the claims. It should be noted that those skilled in the art can make some modifications and improvements without departing from the concept of the present application, all of which are included in the scope of protection of the present application. Therefore, the scope of protection of this patent application should be determined by the scope of the attached claims.

Claims

1. A vegetable insulating oil-based immersion coolant for electronic components and devices, comprising: A base oil including a vegetable insulating oil; The present invention relates to a method for producing a silicone-based phosphate-based compound, a silicone-based phosphite-based compound, and a combination of one or more of the following compounds: a polyorganosiloxane-based compound, a silicon-based phosphate-based compound, and a silicon-based phosphite-based compound; and a viscosity of 0.02 mm. 2 / s ~ 1.05 mm 2 and a viscosity reducing additive, wherein the viscosity reducing additive is at least one of:

2. 2. The immersion coolant of claim 1, wherein the vegetable insulating oil comprises one or more combinations of FR3 vegetable insulating oil, NP vegetable insulating oil, RDB vegetable insulating oil, VinsOil vegetable insulating oil, BIOTEMP vegetable insulating oil, MIDEL vegetable based oil, and PFAE vegetable insulating oil.

3. The polyorganosiloxane compound includes one or a combination of dimethyldimethoxysilane, methyltrimethoxysilane, dimethylsiloxane, low polymerization degree dimethylsiloxane, trimethylsilane, trimethoxysilane, pentamethyldisiloxane, and methoxytriethyleneoxypropyltrimethoxysilane; and / or The silicon-based phosphate-based compound includes one or a combination of two of tris(trimethylsilyl)phosphate and bis(trimethylsilylated vinyl phosphate; and / or 2. The immersion coolant of claim 1, wherein the silicon-based phosphite-based compound comprises a combination of one or more of mono(trimethylsilyl)phosphite, tris(trimethylsilyl)phosphite, and diethyltrimethylsilylphosphite.

4. The immersion coolant according to any one of claims 1 to 3, further comprising an inorganic thermally conductive filler which is an insulating filler.

5. 5. The immersion coolant of claim 4, wherein the inorganic thermally conductive fillers include a combination of at least one of boron nitride, aluminum nitride, silicon nitride, silicon oxide, aluminum oxide, zinc oxide, and magnesium oxide.

6. 5. The immersion coolant of claim 4, wherein in the immersion coolant, a weight percentage of the base oil is between 50% and 90%, a weight percentage of the viscosity reducing additive is between 10% and 50%, and a weight percentage of the inorganic thermally conductive filler is between 1% and 10%.

7. The immersion cooling liquid according to any one of claims 1 to 3, characterized in that the electronic component or device is a lithium ion battery.

8. The immersion cooling liquid according to any one of claims 1 to 3, characterized in that the immersion cooling liquid is produced by mixing and stirring the respective components contained therein.

9. The immersion cooling liquid of claim 8, characterized in that the stirring time is 2h to 5h.

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