Biodegradable immersed cooling medium composition as well as preparation method and application thereof

Abstract

The invention relates to the technical field of cooling media, in particular to a biodegradable immersed cooling medium composition and a preparation method and application thereof. The immersed cooling medium composition is prepared from the following components in parts by weight: 85 to 99.7 parts of base oil, 0.1 to 3.0 parts of a dispersing agent, 0.1 to 2.0 parts of an antioxidant, 0 to 1.5 parts of a pour point depressant, 0.01 to 1.0 part of a metal deactivator, 0.01 to 3.0 parts of an anti-rust agent, 0.1 to 3.0 parts of a rubber protective agent and 0.001 to 1.0 part of an anti-foaming agent, the immersion type cooling medium composition has excellent electrical performance, heat conduction performance, oxidation stability and heat stability, has good compatibility with materials such as metal copper and stainless steel, has biodegradability, and meets the current environmental protection requirement.

Description

Technical Field

[0001] This invention relates to the field of cooling medium technology, specifically to a biodegradable immersion cooling medium composition, its preparation method, and its application. Background Technology

[0002] Supercharging equipment for electric vehicles generates a significant amount of heat during operation. If this heat cannot be effectively dissipated, it can lead to overheating, which not only reduces charging efficiency but may also cause safety hazards. High-power charging guns employing liquid cooling technology can effectively avoid these problems.

[0003] Chinese patent CN 206432739 U discloses a cooling system for a charging device, including a charging gun, a charging cable, a power module, a heat sink, a circulating pump, and a circulating fluid pipeline. The circulating fluid pipeline contains coolant. The circulating pump provides power to drive the coolant to flow through the circulating pipeline, carrying away heat and transferring it to the heat sink for heat dissipation. This ensures timely heat dissipation during high-current charging and guarantees charging safety.

[0004] Chinese Patent Publication No. CN 110281794 A discloses a high-power charging cooling system and active cooling control method for new energy vehicles. The cooling system includes a charging gun, charging cable, radiator, water pump, and water tank. Coolant in the water tank is pumped out and enters the radiator, where it is cooled and then flows into the charging cable to remove heat from the system before returning to the water tank. The invention also includes a cooling system control unit, which transmits detection data via a network to a remote computer for storage and analysis. By analyzing the detection data and comparing it with an experience database, a control strategy for each detected quantity is derived using a working condition model algorithm. Control commands are then issued to the cooling system control unit, thereby improving the reliability and stability of the cooling system.

[0005] Chinese patent CN 210212078 U discloses a liquid-cooled cable system and cooling system for high-power charging of electric vehicles, including a liquid-cooled cable, a charging gun, a water tank, a water pump, and a radiator. The charging gun contains a DC core component assembly. The water tank contains insulating coolant, which is driven by the water pump to flow through pipes to remove the heat generated during charging, thereby preventing safety issues such as burn-out of the charging product.

[0006] However, the specific composition of the coolant used in the aforementioned cooling system was not disclosed.

[0007] Chinese Patent Publication No. CN117625141A discloses an immersion coolant composition and its preparation method. The composition includes: 51-99 parts of monoester and / or diester synthetic base oil, 1-49 parts of neopentyl polyol ester synthetic base oil, 0.5-2 parts of antioxidant, 0.05-0.3 parts of metal deactivator, 0.5-2 parts of friction modifier, 0.2-1 parts of rust inhibitor, 0.01-0.05 parts of acid binder, 0.01-0.1 parts of antifoaming agent, and 0.01-0.1 parts of demulsifier. This coolant composition is an ultra-low kinematic viscosity fluid medium with good low-temperature cooling performance, high oxidation stability, chemical stability, high flash point, low volatility, good electrical properties, and excellent biodegradability. However, the limited variety of base oils in this composition may lead to certain limitations in material compatibility.

[0008] Therefore, it is essential to develop a biodegradable immersion cooling medium composition that can solve the above-mentioned technical problems, as well as its preparation method and application. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a biodegradable immersion cooling medium composition compatible with a variety of materials, its preparation method, and its applications. The immersion cooling medium composition of this invention possesses excellent electrical properties, thermal conductivity, excellent oxidation stability, and thermal stability; it exhibits good compatibility with materials such as copper and stainless steel; and it is biodegradable, meeting current environmental protection requirements.

[0010] This invention provides an immersion charging device cooling medium suitable for high-power charging gun equipment. The product has excellent performance and can ensure the safe and efficient operation of high-power charging gun equipment.

[0011] This invention is achieved through the following technical solutions:

[0012] A biodegradable immersion cooling medium composition comprising the following components: base oil, dispersant, antioxidant, pour point depressant, metal deactivator, rust inhibitor, rubber protectant, and antifoaming agent.

[0013] Preferably, the immersion cooling medium composition comprises, by weight, the following components: 85-99.7 parts base oil, 0.1-3.0 parts dispersant, 0.1-2.0 parts antioxidant, 0-1.5 parts pour point depressant, 0.01-1.0 parts metal deactivator, 0.01-3.0 parts rust inhibitor, 0.1-3.0 parts rubber protectant, and 0.001-1.0 parts antifoaming agent.

[0014] Preferably, the immersion cooling medium composition comprises, by weight, the following components: 95-97 parts base oil, 1 part dispersant, 1-1.5 parts antioxidant, 0-1.5 parts pour point depressant, 0.2 parts metal deactivator, 0.2 parts rust inhibitor, 0.5 parts rubber protectant, and 0.1 parts antifoaming agent.

[0015] Preferably, the base oil has a kinematic viscosity of less than 15 mmHg at 40°C. 2 The mixture consists of at least one of CTL base oil and PAO2, combined with a synthetic ester having a kinematic viscosity of less than 15 mm² / s at 40°C. When the base oil does not contain CTL base oil, no pour point depressant is required.

[0016] More preferably, the base oil includes at least one of monoesters, diesters and unsaturated polyol esters, such as DE11772, 3221, DOA, etc.

[0017] Preferably, the dispersant comprises succinimide compounds.

[0018] More preferably, the dispersant includes at least one of monoalkenyl succinimide and dienyl succinimide, such as T151 and T152.

[0019] Preferably, the antioxidant includes at least one of amine antioxidants and phenolic antioxidants, such as L57 and L135.

[0020] Preferably, the pour point depressant includes at least one of polyalphaolefin and polymethacrylate compounds, such as T803B, TC-602, and V1-300.

[0021] Preferably, the metal deactivator includes at least one of benzotriazole derivatives, thiadiazole derivatives, and heterocyclic derivatives, such as T561, T571, and 7001.

[0022] Preferably, the rust inhibitor includes at least one of sulfonates, carboxylic acids, amides, and heterocyclic compounds, such as RC4801, RC4802, RC4803, and RC4810.

[0023] Preferably, the rubber protectant includes a substance containing silicone resin, such as EL1291.

[0024] Preferably, the antifoaming agent includes at least one of silicone oil-based and composite antifoaming agents, such as T901 and No. 1 antifoaming agent.

[0025] The present invention also relates to a method for preparing the above-mentioned immersion cooling medium composition, comprising the following steps:

[0026] All components except the base oil are added to the base oil and blended until all components are uniformly dissolved in the base oil.

[0027] Preferably, the mixing temperature is 50-70℃, and the mixing time is 2-3 hours.

[0028] The composition described in this invention can be prepared using conventional lubricating oil blending methods. Specifically, the following method can be used: add each additive component to the base oil and blend at a temperature of 50-70°C for 2-3 hours until the additives are uniformly dissolved in the base oil.

[0029] The present invention also relates to the application of the above-described immersion cooling medium composition in a liquid-cooled charging gun.

[0030] Preferably, the liquid-cooled charging gun is an immersion liquid-cooled charging gun.

[0031] Preferably, the liquid-cooled charging gun is used for charging new energy vehicles.

[0032] The beneficial effects of this invention are:

[0033] The immersion cooling medium composition of this invention possesses excellent electrical properties, thermal conductivity, oxidation stability, and thermal stability. It exhibits good compatibility with materials such as copper and stainless steel, and is biodegradable, meeting current environmental protection requirements. This invention uses at least one base oil selected from CTL base oil and PAO2, along with an ester base oil, demonstrating significant effectiveness in improving compatibility with rubber and plastic parts. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as a result. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solutions of the present invention without departing from the spirit and scope of the present invention, but all such modifications and substitutions fall within the protection scope of the present invention.

[0035] Example 1

[0036] Table 1 Formulation of Example 1

[0037]

[0038]

[0039] Example 2

[0040] Table 2 Formulation of Example 2

[0041] name Dosage (%) Base oil synthetic ester DE11772 40.0 Base oil PAO2 57.0 Dispersant T151 1.0 Antioxidant L135 1.0 Metal deactivator T571 0.2 Rust Inhibitor RC4802 0.2 Rubber Protectant EL1291 0.5 Antifoaming agent T901 0.1

[0042] Example 3

[0043] Table 3 Formulation of Example 3

[0044]

[0045]

[0046] Example 4

[0047] Table 4 Formulation of Example 4

[0048] name Dosage (%) CTL base oil Lu'an 70N 20.0 Base oil synthetic ester DOA 30 Base oil PAO2 45.0 Pour point depressant T803B 1.5 Dispersant T152 1.0 Antioxidant L57 1.5 Metal deactivator 7001 0.2 Rust Inhibitor RC4810 0.2 Rubber Protectant EL1291 0.5 #1 Antifoaming agent 0.1

[0049] Example 5

[0050] Table 5 Formulation of Example 5

[0051] name Dosage (%) Base oil synthetic ester DOA 96.5 Dispersant T152 1.0 Antioxidant L135 1.5 Metal deactivator 7001 0.2 Rust Inhibitor RC4810 0.2 Rubber Protectant EL1291 0.5 #1 Antifoaming agent 0.1

[0052] The composition of the present invention is prepared by the following method: all additives except the base oil (synthetic ester, PAO2, Lu'an 70N) are added to the base oil and mixed at 60°C for 2.5 hours until the additives are uniformly dissolved in the base oil.

[0053] Taking Examples 1-5 as examples, the test results of the mixed coolant are shown in Table 6.

[0054]

[0055]

[0056] As shown in Table 6, Example 5 uses only one type of base oil, and its compatibility with rubber and plastic parts is significantly worse than that of Examples 1-4. In contrast, this invention uses a blend of CTL base oil, at least one base oil from PAO2, and ester base oils, resulting in significantly improved material compatibility.

[0057] The above detailed description is a specific description of one of the feasible embodiments of the present invention. This embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included within the scope of the technical solution of the present invention.

Claims

1. A biodegradable immersion cooling medium composition, characterized in that, Based on parts by weight, it comprises the following components: 85-99.7 parts base oil, 0.1-3.0 parts dispersant, 0.1-2.0 parts antioxidant, 0-1.5 parts pour point depressant, 0.01-1.0 parts metal deactivator, 0.01-3.0 parts rust inhibitor, 0.1-3.0 parts rubber protectant, and 0.001-1.0 parts antifoaming agent.

2. The immersion cooling medium composition according to claim 1, characterized in that, By weight, it includes the following components: 95-97 parts base oil, 1 part dispersant, 1-1.5 parts antioxidant, 0.01-1.5 parts pour point depressant, 0.2 parts metal deactivator, 0.2 parts rust inhibitor, 0.5 parts rubber protectant, and 0.1 parts antifoaming agent.

3. The immersion cooling medium composition according to claim 1, characterized in that, The base oil has a kinematic viscosity of less than 15 mmHg at 40°C. 2 At least one of CTL base oil and PAO2 with a kinematic viscosity of less than 15 mm at 40°C, and a viscosity of / s. 2 / s of synthetic ester complex.

4. The immersion cooling medium composition according to claim 3, characterized in that, The base oil includes at least one of monoesters, diesters, and unsaturated polyol esters.

5. The immersion cooling medium composition according to claim 1, characterized in that, The dispersant includes succinimide compounds.

6. The immersion cooling medium composition according to claim 5, characterized in that, The dispersant includes at least one of monoalkenyl succinimide and dienyl succinimide.

7. The immersion cooling medium composition according to claim 1, characterized in that, The antioxidants include at least one of amine antioxidants and phenolic antioxidants.

8. The immersion cooling medium composition according to claim 1, characterized in that, The pour point depressant includes at least one of polyalphaolefins and polymethacrylates.

9. The immersion cooling medium composition according to claim 1, characterized in that, The metal deactivator includes at least one of benzotriazole derivatives, thiadiazole derivatives, and heterocyclic derivatives.

10. The immersion cooling medium composition according to claim 1, characterized in that, The rust inhibitor includes at least one of sulfonates, carboxylic acids, amides, and heterocyclic compounds.

11. The immersion cooling medium composition according to claim 1, characterized in that, The rubber protective agent includes a substance containing silicone resin.

12. The immersion cooling medium composition according to claim 1, characterized in that, The antifoaming agent includes at least one of silicone oil-based and composite antifoaming agents.

13. A method for preparing the immersion cooling medium composition according to any one of claims 1-12, characterized in that, Includes the following steps: All components except the base oil are added to the base oil and blended until all components are uniformly dissolved in the base oil.

14. The preparation method according to claim 13, characterized in that, The mixing temperature is 50-70℃, and the mixing time is 2-3 hours.

15. The use of the immersion cooling medium composition according to any one of claims 1-12 in a liquid-cooled charging gun.

16. The application according to claim 15, characterized in that, The liquid-cooled charging gun is an immersion liquid-cooled charging gun.

17. The application according to claim 15, characterized in that, The liquid-cooled charging gun is used for charging new energy vehicles.

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