Coolant raw material composition, coolant and its preparation method and application

Abstract

This invention relates to the field of coolants, and discloses a coolant raw material composition, a coolant, its preparation method, and its application. The composition includes: an antifreeze, a primary corrosion inhibitor, a secondary corrosion inhibitor, and an emulsifier; wherein the weight ratio of antifreeze: primary corrosion inhibitor: secondary corrosion inhibitor: emulsifier is 100:(0.1-0.5):(0.1-0.5):(0.3-1); the antifreeze is selected from alcohol compounds; the primary corrosion inhibitor is selected from azole compounds; and the secondary corrosion inhibitor is selected from siloxane-ketone corrosion inhibitors. Using this composition, a coolant with low electrical conductivity, high heat transfer efficiency, and excellent metal corrosion resistance can be formulated. This coolant, used for cooling the power batteries of electric vehicles, can effectively solve the leakage safety hazard problem of traditional high-conductivity coolants.

Description

Technical Field

[0001] This invention relates to the field of coolants, specifically to a coolant raw material composition, a coolant, a preparation method thereof, and its application. Background Technology

[0002] New energy vehicles are of great significance for reducing air pollution, changing the energy structure, and promoting the transformation and upgrading of transportation. Compared with traditional fuel vehicles, the biggest change in new energy vehicles lies in the power system, and the technological research and development of power battery systems is the key to the development of the new energy vehicle industry.

[0003] New energy vehicles primarily rely on drive motors to convert the electrical energy stored in the power battery into the kinetic energy of the wheels, thus propelling the vehicle. The cooling performance of the power battery directly affects its efficiency, lifespan, and safety. Currently, most power battery coolants use inorganic salt components or a mixture of organic acids and inorganic salts, exhibiting extremely high conductivity, typically exceeding 1000 μS / cm. However, using highly conductive coolants in power battery cooling systems may pose a risk of electric shock due to leakage.

[0004] Therefore, providing coolant with low conductivity is of great significance for improving the safety of coolant during use, thereby better meeting the operational needs of power batteries in new energy vehicles. Summary of the Invention

[0005] This invention addresses the problem that high conductivity of existing coolants can affect battery life and safety by providing a coolant raw material composition, a coolant, its preparation method, and its application.

[0006] To achieve the above objectives, a first aspect of the present invention provides a coolant raw material composition, the composition comprising: an antifreeze, a primary corrosion inhibitor, a secondary corrosion inhibitor, and an emulsifier; The weight ratio of the antifreeze: main preservative: auxiliary preservative: emulsifier is 100:(0.1-0.5):(0.1-0.5):(0.3-1). The antifreeze is selected from alcohol compounds; the primary corrosion inhibitor is selected from azole compounds; and the secondary corrosion inhibitor is selected from siloxane ketone corrosion inhibitors.

[0007] A second aspect of the present invention provides a coolant comprising: water and the coolant raw material composition described in the first aspect; The weight ratio of the coolant raw material composition to water is 1:(0.95-1).

[0008] A third aspect of the present invention provides a method for preparing the coolant described in the second aspect above, the method comprising: mixing the coolant raw material composition described in the first aspect above with water to obtain the coolant; The weight ratio of the coolant raw material composition to water is 1:(0.95-1).

[0009] The fourth aspect of the present invention provides the application of the coolant described in the second aspect above in the cooling system of an electric vehicle.

[0010] Through the above technical solution, the composition provided by this invention serves as a raw material component of the coolant. Based on this composition, a coolant with low electrical conductivity can be obtained. On the one hand, it can achieve thermal stability and thermal uniformity of the power battery pack, keeping the battery pack constant within the optimal operating temperature range and avoiding overall power battery source thermal runaway caused by local overheating. On the other hand, it can achieve heat dissipation management of the drive motor, timely dissipating the motor's operating heat to avoid thermal shutdown and ensuring the safe operation of the motor. This composition can significantly improve the safety of the coolant during the use of the power battery and can give the coolant high heat transfer efficiency and excellent metal corrosion resistance. Detailed Implementation

[0011] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention. Any equivalent changes or modifications made in accordance with the spirit and essence of the present invention should fall within the protection scope of the present invention.

[0012] The first aspect of the present invention provides a coolant raw material composition, the composition comprising: an antifreeze, a primary preservative, a secondary preservative, and an emulsifier; The weight ratio of the antifreeze: main preservative: auxiliary preservative: emulsifier is 100:(0.1-0.5):(0.1-0.5):(0.3-1). The antifreeze is selected from alcohol compounds; the primary corrosion inhibitor is selected from azole compounds; and the secondary corrosion inhibitor is selected from siloxane ketone corrosion inhibitors.

[0013] The composition provided by this invention includes an antifreeze, a primary corrosion inhibitor, a secondary corrosion inhibitor, and an emulsifier. The antifreeze is selected from alcohol compounds, the primary corrosion inhibitor is selected from azole compounds, and the secondary corrosion inhibitor is selected from siloxane-ketone corrosion inhibitors. Each component satisfies the aforementioned specific proportional relationship. The inventors of this invention have discovered that using the composition provided by this invention as a coolant raw material component results in a coolant with low electrical conductivity, high heat transfer efficiency, and excellent metal corrosion resistance, thanks to the synergistic effect of its components.

[0014] According to the present invention, in the coolant raw material composition, the components satisfy the above-mentioned proportional relationship, preferably, the weight ratio of antifreeze: main corrosion inhibitor: auxiliary corrosion inhibitor: emulsifier is 100:(0.2-0.4):(0.2-0.4):(0.5-0.8), which enables the coolant to better balance the comprehensive performance of high heat transfer efficiency, low electrical conductivity and excellent metal corrosion resistance.

[0015] According to the present invention, in the coolant raw material composition, preferably, the antifreeze agent can be selected from at least one of ethylene glycol, propylene glycol and glycerol, which is more conducive to improving the antifreeze performance and compatibility of the coolant.

[0016] According to a preferred embodiment of the present invention, the antifreeze agent in the coolant raw material composition is ethylene glycol.

[0017] According to the present invention, in the coolant raw material composition, the primary corrosion inhibitor is selected from azole compounds, which can synergistically work with the secondary corrosion inhibitor and emulsifier to give the coolant excellent corrosion inhibition properties. Preferably, the primary corrosion inhibitor may further be selected from at least one of methylbenzotriazole, mercaptobenzothiazole, benzotriazole, and benzotriazole derivatives.

[0018] According to a preferred embodiment of the present invention, the main corrosion inhibitor in the coolant raw material composition is a benzotriazole derivative.

[0019] In this invention, the benzotriazole derivative has excellent water solubility and metal coordination ability, and can be selected from at least one of benzotriazole derivative TTA, benzotriazole derivative DBMA, benzotriazole derivative HEBTA and benzotriazole derivative Rz-W42.

[0020] According to the present invention, in the coolant raw material composition, the auxiliary corrosion inhibitor is selected from siloxane ketone corrosion inhibitors, which can synergistically work with the main corrosion inhibitor and emulsifier to give the coolant low electrical conductivity and the ability to slow down corrosion of both metallic and non-metallic materials. Preferably, the auxiliary corrosion inhibitor may be selected from at least one of sulfonated siloxane ketones, amino siloxane ketones, and propyltrimethoxysilane.

[0021] According to a preferred embodiment of the present invention, the auxiliary preservative in the coolant raw material composition is a sulfonated siloxane ketone.

[0022] According to the present invention, in the coolant raw material composition, the emulsifier not only increases the solubility of the preservative in water, but also improves the stability of the coolant, enabling it to be stored and used for a long time without sedimentation. Preferably, the emulsifier may be selected from at least one of sorbitol, monoethanolamine, diethanolamine, and triethanolamine.

[0023] According to a preferred embodiment of the present invention, the emulsifier in the coolant raw material composition is triethanolamine.

[0024] According to the present invention, in addition to the components described above, the coolant raw material composition may also include an antifoaming agent to reduce foam generation during high-speed circulation of the coolant. In this invention, the definition of the antifoaming agent is relatively broad, and defoaming agents commonly used in battery coolants can be selected. Preferably, the antifoaming agent may be selected from polyether-modified silicone and / or dimethyl silicone oil, which is more conducive to improving the defoaming effect and also takes into account compatibility with other components.

[0025] According to the present invention, in the coolant raw material composition, preferably, the weight ratio of the antifreeze to the defoamer is 100:(0.01-0.03).

[0026] According to the present invention, in addition to the components described above, the coolant raw material composition may also include a dyeing agent, which facilitates the identification of the coolant's condition and whether a leak has occurred. In this invention, the definition of the dyeing agent is relatively broad, and dyeing agents commonly used in battery coolants can be selected. Preferably, the dyeing agent may be selected from at least one of fluorescent green, fluorescent yellow, and acid red.

[0027] According to the present invention, in the coolant raw material composition, preferably, the weight ratio of the antifreeze to the dye is 100:(0.01-0.05).

[0028] The composition provided by the present invention, as a raw material component of coolant, enables the coolant to have low electrical conductivity, with a conductivity of <100μS / cm at 20°C, preferably 75-95μS / cm, and the coolant has high heat transfer efficiency and excellent resistance to metal corrosion.

[0029] According to a preferred embodiment of the present invention, the composition comprises an antifreeze (ethylene glycol), a primary preservative (benzotriazole derivative Rz-W42), a secondary preservative (sulfonated siloxane), an emulsifier (triethanolamine), a defoamer, and a colorant, wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: colorant is 100:(0.2-0.4):(0.2-0.4):(0.5-0.8):(0.01-0.03):(0.01-0.05), which can further enhance the coolant's comprehensive performance, which combines low electrical conductivity, high heat transfer efficiency, and good resistance to metal corrosion.

[0030] A second aspect of the present invention provides a coolant comprising: water and the coolant raw material composition described in the first aspect; The weight ratio of the coolant raw material composition to water is 1:(0.95-1).

[0031] According to the present invention, the coolant includes the above-mentioned specific components and satisfies a specific component ratio. Compared with conventional coolants, the coolant has significantly reduced electrical conductivity, high heat transfer efficiency, and excellent metal corrosion resistance.

[0032] According to the present invention, the coolant has the characteristic of low electrical conductivity. The electrical conductivity of the coolant at 20°C is <100 μS / cm, preferably 75-95 μS / cm.

[0033] According to the present invention, deionized water is preferably used for the water component in the coolant.

[0034] The coolant provided by this invention has significantly reduced electrical conductivity, which can greatly reduce the risk of electric shock caused by leakage during the operation of the power battery and improve the safety of the coolant during use. In addition, this coolant has high heat transfer efficiency, good cooling effect, and excellent metal corrosion resistance.

[0035] A third aspect of the present invention provides a method for preparing the coolant described in the second aspect above, the method comprising: mixing the coolant raw material composition described in the first aspect above with water to obtain the coolant; The weight ratio of the coolant raw material composition to water is 1:(0.95-1).

[0036] According to the present invention, in the preparation method, there is no particular limitation on the way the coolant raw material composition is mixed with water. Any feeding sequence and mixing method can be used, as long as the coolant raw material composition can be fully dispersed in water to obtain a uniform coolant.

[0037] According to the present invention, in the preparation method, deionized water is preferably used as the raw material.

[0038] According to a preferred embodiment of the present invention, the following preparation steps can be adopted: (S1) The antifreeze and the main preservative in the composition are first mixed according to the above proportions, and then mixed with water to obtain a first mixed system; (S2) The preservative, emulsifier and defoamer in the composition are added to the first mixing system in sequence for a third mixing to obtain a second mixing system; (S3) The dye in the composition is added to the second mixing system for a fourth mixing to obtain a cooling liquid.

[0039] In this invention, the preferred preparation steps described above facilitate the full dissolution and mixing of each component, thereby improving the stability and consistent performance of the coolant.

[0040] The fourth aspect of the present invention provides the application of the coolant described in the second aspect above in the cooling system of an electric vehicle.

[0041] The coolant provided by this invention has low electrical conductivity, high heat transfer efficiency, and excellent metal corrosion resistance. When used as a coolant in the cooling system of electric vehicle power batteries, it significantly improves safety during use compared to conventional coolants with high electrical conductivity. In addition, the high heat transfer efficiency and excellent metal corrosion resistance of this coolant can better meet the operating requirements of electric vehicle power batteries.

[0042] The present invention will be described in detail below through examples. Unless otherwise specified, the following examples and comparative examples are all conventional methods; the reagents and materials mentioned are commercially available unless otherwise specified.

[0043] Example 1 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C1) consists of: antifreeze (ethylene glycol), primary preservative (benzotriazole derivative Rz-W42), secondary preservative (sulfonated siloxane ketone), emulsifier (triethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.3:0.3:0.7:0.02:0.03.

[0044] Preparation of coolant: (S1) The antifreeze and the main preservative in the above composition are first mixed (stirring speed is 44 rpm, stirring time is 40 min), and then mixed with deionized water in a second mixing (stirring speed is 44 rpm, stirring time is 30 min) to obtain the first mixed system; (S2) The preservative, emulsifier and defoamer in the above composition are added to the first mixing system in sequence for a third mixing (stirring speed is 44 rpm and stirring time is 30 min) to obtain the second mixing system; (S3) The dye in the above composition is added to the second mixing system above for a fourth mixing (stirring speed is 44 rpm, stirring time is 20 min) to obtain a cooling liquid (denoted as L1).

[0045] The components in the composition are fed in the proportions specified in composition C1 above, and the weight ratio of composition C1 to deionized water is 1:0.97.

[0046] Example 2 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C2) consists of: antifreeze (ethylene glycol), primary preservative (benzotriazole derivative Rz-W42), secondary preservative (sulfonated siloxane ketone), emulsifier (triethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.2:0.4:0.7:0.02:0.03.

[0047] Preparation of coolant: Using the above composition C2, and following the same steps and mixing conditions as in Example 1, a coolant (denoted as L2) was prepared.

[0048] The components in the composition are fed in the proportions specified in composition C2 above, and the weight ratio of composition C2 to deionized water is 1:0.97.

[0049] Example 3 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C3) consists of: antifreeze (ethylene glycol), primary preservative (benzotriazole derivative Rz-W42), secondary preservative (sulfonated siloxane ketone), emulsifier (triethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.4:0.2:0.7:0.01:0.03.

[0050] Preparation of coolant: Using the above composition C3, and following the same steps and mixing conditions as in Example 1, a coolant (denoted as L3) was prepared.

[0051] The components in the composition are fed in the proportions specified in composition C3 above, and the weight ratio of composition C3 to deionized water is 1:0.97.

[0052] Example 4 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C4) consists of: antifreeze (ethylene glycol), primary preservative (benzotriazole), secondary preservative (aminosiloxane), emulsifier (sorbitol), defoamer (dimethyl silicone oil defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.5:0.1:1:0.02:0.03.

[0053] Preparation of coolant: The coolant (denoted as L4) was prepared using the above composition C4 and following the same steps and mixing conditions as in Example 1.

[0054] The components in the composition are fed in the proportions specified in the above composition C4, and the weight ratio of composition C4 to deionized water is 1:0.97.

[0055] Example 5 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C5) consists of: antifreeze (ethylene glycol), primary preservative (methylbenzotriazole), secondary preservative (propyltrimethoxysilane), emulsifier (monoethanolamine), defoamer (polyether-modified silicone defoamer), and dye (acid red); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.1:0.1:0.3:0.02:0.03.

[0056] Preparation of coolant: The coolant (denoted as L5) was prepared using the above composition C5 and following the same steps and mixing conditions as in Example 1.

[0057] The components in the composition are fed in the proportions specified in the above composition C5, and the weight ratio of composition C5 to deionized water is 1:0.99.

[0058] Example 6 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C6) consists of: antifreeze (ethylene glycol), primary preservative (mercaptobenzothiazole), secondary preservative (propyltrimethoxysilane), emulsifier (diethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.5:0.1:1:0.02:0.03.

[0059] Preparation of coolant: The coolant (denoted as L6) was prepared using the above composition C6 and following the same steps and mixing conditions as in Example 1.

[0060] The components in the composition are fed in the proportions specified in the above composition C6, and the weight ratio of composition C6 to deionized water is 1:0.97.

[0061] Example 7 This embodiment illustrates the preparation of the composition and the coolant. The composition (denoted as C7) consists of: antifreeze (ethylene glycol), primary preservative (mercaptobenzothiazole), secondary preservative (aminosiloxane ketone), emulsifier (diethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.5:0.1:1:0.02:0.03.

[0062] Preparation of coolant: Using the above composition C7, and following the same steps and mixing conditions as in Example 1, a coolant (denoted as L7) was prepared.

[0063] The components in the composition are fed in the proportions specified in the above composition C7, and the weight ratio of composition C7 to deionized water is 1:0.97.

[0064] Comparative Example 1 This comparative example is used to illustrate the preparation of the composition and the coolant. The composition (denoted as DC1) consists of: antifreeze (ethylene glycol), primary preservative (mercaptobenzothiazole), secondary preservative (oxalic acid), emulsifier (diethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.5:0.1:1:0.02:0.03.

[0065] Preparation of coolant: Using the above composition DC1, a coolant (denoted as DL1) was prepared using the same steps and mixing conditions as in Example 7.

[0066] The components in the composition are fed in the proportions specified in composition DC1, and the weight ratio of composition DC1 to deionized water is 1:0.97.

[0067] Comparative Example 2 This comparative example is used to illustrate the preparation of the composition and the coolant. The composition (denoted as DC2) consists of: antifreeze (ethylene glycol), primary preservative (sebacic acid), secondary preservative (aminosiloxane ketone), emulsifier (monoethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.5:0.1:1:0.02:0.03.

[0068] Preparation of coolant: Using the above composition DC2, a coolant (denoted as DL2) was prepared using the same steps and mixing conditions as in Example 7.

[0069] Comparative Example 3 This comparative example is used to illustrate the preparation of the composition and the coolant. The composition (denoted as DC3) consists of: antifreeze (ethylene glycol), primary preservative (mercaptobenzothiazole), secondary preservative (aminosiloxane ketone), emulsifier (diethanolamine), defoamer (polyether-modified silicone defoamer), and dye (fluorescent green); wherein the weight ratio of antifreeze: primary preservative: secondary preservative: emulsifier: defoamer: dye is 100:0.6:0.6:1.2:0.02:0.03.

[0070] Preparation of coolant: Using the above composition DC3, a coolant (denoted as DL3) was prepared using the same steps and mixing conditions as in Example 7.

[0071] Test case The electrical conductivity, heat transfer efficiency, and corrosion resistance of the coolants L1-L7 and DL1-DL3 prepared in the above embodiments and comparative examples were tested.

[0072] 1. Conductivity test The conductivity meter was used for measurement, and the method is as follows: A1 Principle Take a 100 mL sample of coolant and measure its conductivity using a conductivity meter. A2 Instruments and Materials A2.1 Conductivity meter: accuracy class 0.5, with automatic temperature compensation function; select appropriate conductivity electrodes according to the conductivity range of the tram coolant; A2.2 Graduated cylinder: 100mL capacity; A2.3 Erlenmeyer flask: 100mL capacity, with stopper; A2.4 Constant temperature water bath: capable of temperature control at 25±0.2 ℃; A3 Test Procedure A3.1 According to the requirements of the conductivity meter's instruction manual, select a conductivity calibration solution with an appropriate measurement range to calibrate the conductivity meter and electrodes; A3.2 Measure 100 mL of the coolant sample into a conical flask using a graduated cylinder, and place it in a water bath that has been kept at a constant temperature of 25 ± 0.2 °C for 20 min; A3.3 Immerse the electrode in the coolant sample to determine the conductivity. Repeat the measurement twice and record the sample temperature at the same time. A3.4 When measuring coolant samples with conductivity less than 3 μS / cm, a conductivity meter equipped with a sealed flow cell should be selected and the measurement should be performed under flowing conditions. A4 Result Calculation The arithmetic mean of two repeated measurements was used as the test result, accurate to 0.1 μS / cm.

[0073] The conductivity of the coolants L1-L7 and DL1-DL3 was tested according to the above method, and the results are shown in Table 1.

[0074] Table 1

[0075] As shown in Table 1, the coolants L1-L7 prepared using the compositions of the present invention have low conductivity, achieving a conductivity of less than 100 μS / cm, which can significantly reduce the risk of electric shock caused by leakage during the operation of the power battery and improve the safety of use. In contrast, the coolants DL1-DL3 prepared using the compositions of Comparative Examples 1-3 have significantly higher conductivity.

[0076] 2. Heat transfer efficiency test The thermal conductivity of the coolants L1-L7 and DL1-DL3 was tested. The higher the thermal conductivity value, the faster the heat is transferred inside the material, and the higher the heat dissipation efficiency. The results are shown in Table 2.

[0077] Table 2

[0078] As can be seen from Table 2, the thermal conductivity of the coolant L1-L7 prepared using the composition of the present invention is not less than 0.34 W / (m·K), which has a high heat transfer rate and high heat dissipation efficiency, and is more conducive to timely removal of the heat from the motor. In contrast, the thermal conductivity of the coolant DL1-DL3 prepared using the compositions of Comparative Examples 1-3 is relatively low.

[0079] 3. Corrosion resistance test The metal corrosion resistance performance of the above-mentioned coolants L1-L7 and DL1-DL3 was tested, and the results are shown in Table 3.

[0080] Test pieces: Test pieces were prepared using typical metals (aluminum, copper, steel and brass) from electric vehicle cooling systems, and weighed after cleaning (recorded as M1). Medium: 750 mL of the above-mentioned coolant to be tested; Environment: Temperature 80±2℃, air flow rate 100±10mL / min; Duration: 336±2h as specified in SH / T 0085.

[0081] The testing steps are as follows: (1) Assemble the test pieces into a bundle, immerse them in the above-mentioned cooling liquid, seal them and place them in a constant temperature (80±2℃) device for immersion time of 336±2h; (2) Take out the test piece, clean and dry it, and weigh it again (record as M2); (3) Calculate the weight change of the test piece according to the following formula (the blank value of cleaning needs to be deducted). The weight change of the test piece should not exceed ±5mg. ΔM = (M1 - M2 - M0) × 1000; where, ΔM - Change in weight of the test piece, in milligrams (mg); M1 - The weight of the test piece before the above test, in grams (g). M2 - The weight of the test piece after the above test, in grams (g). M0 - Blank value for sample cleaning, in grams (g).

[0082] Table 3

[0083] As shown in Table 3, the coolants L1-L7 using the composition of the present invention have low corrosivity to typical metals of electric vehicle cooling systems, such as aluminum, copper, steel, and brass, and have good compatibility.

[0084] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A coolant raw material composition, characterized in that, The composition comprises: an antifreeze, a primary preservative, a secondary preservative, and an emulsifier; The weight ratio of the antifreeze: main preservative: auxiliary preservative: emulsifier is 100:(0.1-0.5):(0.1-0.5):(0.3-1). The antifreeze is selected from alcohol compounds; the primary corrosion inhibitor is selected from azole compounds; and the secondary corrosion inhibitor is selected from siloxane ketone corrosion inhibitors.

2. The coolant raw material composition according to claim 1, wherein, The weight ratio of the antifreeze: main preservative: auxiliary preservative: emulsifier is 100: (0.2-0.4): (0.2-0.4): (0.5-0.8).

3. The coolant raw material composition according to claim 1 or 2, wherein, The antifreeze is selected from at least one of ethylene glycol, propylene glycol and glycerol, preferably ethylene glycol; And / or, the primary preservative is selected from at least one of methylbenzotriazole, mercaptobenzothiazole, benzotriazole and benzotriazole derivatives, preferably benzotriazole derivatives; And / or, the auxiliary preservative is selected from at least one of sulfonated siloxane, amino siloxane and propyltrimethoxysilane, preferably sulfonated siloxane; And / or, the emulsifier is selected from at least one of sorbitol, monoethanolamine, diethanolamine and triethanolamine, preferably triethanolamine.

4. The coolant raw material composition according to any one of claims 1-3, wherein, The coolant raw material composition also includes an antifoaming agent; Preferably, the defoamer is selected from polyether-modified silicone and / or dimethyl silicone oil.

5. The coolant raw material composition according to claim 4, wherein, The weight ratio of the antifreeze to the defoamer is 100:(0.01-0.03).

6. The coolant raw material composition according to any one of claims 1-5, wherein, The coolant raw material composition also includes a dyeing agent; Preferably, the weight ratio of the antifreeze to the dye is 100:(0.01-0.05).

7. A coolant, characterized in that, The coolant comprises: water and the coolant raw material composition according to any one of claims 1-6; The weight ratio of the coolant raw material composition to water is 1:(0.95-1).

8. The coolant according to claim 7, wherein, The coolant has a conductivity of <100μS / cm at 20℃, preferably 75-95μS / cm.

9. A method for preparing the coolant according to claim 7 or 8, characterized in that, The preparation method includes: mixing the coolant raw material composition according to any one of claims 1-6 with water to obtain a coolant; The weight ratio of the coolant raw material composition to water is 1:(0.95-1).

10. The application of the coolant according to claim 7 or 8 in an electric vehicle cooling system.

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