A high-thermal-conductivity bacteriostatic new energy battery cooling liquid and a preparation method thereof

Abstract

The application belongs to the technical field of new energy battery cooling liquid, and particularly relates to a high-thermal-conductivity bacteriostatic new energy battery cooling liquid and a preparation method thereof. The high-thermal-conductivity bacteriostatic new energy battery cooling liquid comprises, by mass percentage, ethylene glycol 40-60%, corrosion inhibitor 0.2-0.5%, acrylic block high-molecular polymer 0.2-0.8%, plant polyacid modified bamboo fiber 0.1-0.3%, nano-boehmite 0.1-0.3%, defoaming agent 0.01-0.05%, deionized water to make up the rest to 100%, and pH adjuster to adjust the pH to 7.5-8.5. The bacteriostatic new energy battery cooling liquid is based on the combined action of the plant polyacid modified bamboo fiber, the nano-boehmite and the acrylic block high-molecular polymer, so that the bacteriostatic new energy battery cooling liquid has excellent bacteriostasis, thermal conductivity, flame retardancy and corrosion resistance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy battery cooling liquid, and particularly relates to a high-thermal-conductivity bacteriostatic new energy battery cooling liquid and a preparation method thereof. BACKGROUND

[0002] Ternary lithium batteries are the main type of power batteries for new energy vehicles, and have the advantages of higher energy density and greater power battery capacity under the same volume. However, a large amount of heat is generated during charging and discharging, which may cause serious safety hazards if not dissipated in time. Liquid cooling technology has the advantages of high thermal conductivity, more uniform heat dissipation and low energy consumption, and is the main method to solve the heat dissipation problem of new energy batteries. The key to determining the effectiveness of liquid cooling technology lies in the performance of the cooling liquid.

[0003] Compared with traditional cooling liquids, the cooling liquid for new energy batteries needs to have higher thermal conductivity (to avoid thermal runaway, improve battery endurance and service life), low electrical conductivity (to avoid short circuit risk), and flame retardancy (to avoid thermal runaway). In addition to the above performance requirements, the cooling liquid is prone to breed bacteria and other microorganisms after long-term circulation. The microorganisms adhere to the surface of the cooling pipeline, not only reducing the flowability of the cooling liquid and affecting the heat dissipation efficiency, but also containing various acids in the metabolic products of the microorganisms, leading to corrosion of metal materials and decomposition of additives in the cooling liquid, resulting in performance degradation.

[0004] The existing new energy battery cooling liquid focuses on the thermal conductivity and electrical conductivity of the cooling liquid. For example, a Chinese patent with the publication number CN115584249B discloses a high-efficiency thermal-conducting new energy vehicle cooling liquid and a preparation method thereof. The components include a base liquid with a mass-volume ratio of 500-1000 mL: 2-10 mL: 0.03-0.5 g: 5-10 g: 5-10 g: 0.02-0.1 g: 1-10 g, a suspension of silane-modified nano-aluminum oxide with a mass concentration of 1-5%, a defoaming agent, a corrosion inhibitor, a rust inhibitor, a scale inhibitor and an inhibition additive, and the pH of the cooling liquid is adjusted to 7.5-8.5 by alkali metal hydroxide. This technical solution has the advantages of high thermal conductivity and good metal corrosion resistance.

[0005] A Chinese patent with publication number CN117402596A discloses a new energy vehicle coolant and a preparation method thereof, and belongs to the technical field of vehicle coolants. The coolant comprises the following components in mass percentage: 30-60% of an alcohol compound, 1.0-3.5% of A corrosion inhibitor, 0.2-1.5% of B corrosion inhibitor, 0.05-0.5% of C corrosion inhibitor, 0.005-0.01% of a defoaming agent, 0.001-0.01% of a colorant, and the balance of deionized water. The new energy vehicle coolant has the characteristics of low metal corrosion rate, good rubber compatibility, low conductivity, high boiling point, and low freezing point, etc.

[0006] However, there are few reports on bacteriostatic coolants in the prior art, so it is of great significance to provide a bacteriostatic new energy battery coolant with high thermal conductivity and a preparation method thereof. SUMMARY

[0007] The present application aims to at least solve one of the above technical problems in the prior art. To this end, the purpose of the present application is to provide a bacteriostatic new energy battery coolant with high thermal conductivity, which has excellent bacteriostatic property, thermal conductivity, flame retardancy and corrosion resistance.

[0008] The second aspect of the present application provides a preparation method of a bacteriostatic new energy battery coolant with high thermal conductivity.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0010] The first aspect of the present application provides a bacteriostatic new energy battery coolant with high thermal conductivity. The raw materials include, in mass percentage: 40-60% of ethylene glycol, 0.2-0.5% of a corrosion inhibitor, 0.2-0.8% of an acrylic block high molecular polymer, 0.1-0.3% of a plant polyacid modified bamboo fiber, 0.1-0.3% of nano boehmite, 0.01-0.05% of a defoaming agent, deionized water to make up the balance to 100%, and a pH adjuster to adjust the pH to 7.5-8.5.

[0011] In some embodiments of the present application, the mass ratio of the plant polyacid modified bamboo fiber, nano boehmite and acrylic block high molecular polymer is 1:1:1-3.

[0012] In a preferred embodiment of the present application, the mass ratio of the plant polyacid modified bamboo fiber, nano boehmite and acrylic block high molecular polymer is 1:1:2.

[0013] In some embodiments of the present application, the corrosion inhibitor comprises a mass ratio of 1-2:1 of an azole corrosion inhibitor and a p-hydroxybenzoic acid ester corrosion inhibitor.

[0014] In a preferred embodiment of the present application, the corrosion inhibitor is a mixture of azole corrosion inhibitor and p-hydroxybenzoate corrosion inhibitor in a mass ratio of 1:1.

[0015] In some embodiments of the present application, the azole corrosion inhibitor is selected from at least one of benzotriazole and methylbenzotriazole.

[0016] In a preferred embodiment of the present application, the azole corrosion inhibitor is benzotriazole.

[0017] In some embodiments of the present application, the p-hydroxybenzoate corrosion inhibitor is selected from at least one of methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate and propyl p-hydroxybenzoate.

[0018] In a preferred embodiment of the present application, the p-hydroxybenzoate corrosion inhibitor is methyl p-hydroxybenzoate.

[0019] In some embodiments of the present application, the acrylic block polymer is selected from at least one of BASF PX 4585 and Haoyi AF-5718.

[0020] In a preferred embodiment of the present application, the acrylic block polymer is Haoyi AF-5718.

[0021] In some embodiments of the present application, the plant polyacid comprises chlorogenic acid and / or tannic acid.

[0022] In some embodiments of the present application, the plant polyacid is a mixture of chlorogenic acid and tannic acid in a mass ratio of 1-2:1-2.

[0023] In a preferred embodiment of the present application, the plant polyacid is a mixture of chlorogenic acid and tannic acid in a mass ratio of 1:1.

[0024] In a preferred embodiment of the present application, the bamboo fiber is bamboo fiber powder.

[0025] In some embodiments of the present application, the bamboo fiber powder has a mesh size of 100-200 mesh.

[0026] In a preferred embodiment of the present application, the bamboo fiber powder has a mesh size of 200 mesh.

[0027] In some embodiments of the present application, the method for preparing the plant polyacid modified bamboo fiber comprises the following steps: uniformly mixing plant polyacid and deionized water, adding bamboo fiber for stirring reaction, and then washing and drying after the reaction to obtain the product.

[0028] In some embodiments of the present application, the mass ratio of the plant polyacid and deionized water is 1-5:100.

[0029] In a preferred embodiment of the present application, the mass ratio of the plant polyacid and deionized water is 3:100.

[0030] In some embodiments of the present application, the mass ratio of the plant polyacid and bamboo fiber is 0.1-0.5:1.

[0031] In a preferred embodiment of the present application, the mass ratio of the plant polyacid and bamboo fiber is 0.3:1.

[0032] In some embodiments of the present application, the stirring reaction temperature is 40-60℃, the time is 6-10h, and the rotation speed is 400-600rpm.

[0033] In a preferred embodiment of the present application, the stirring reaction temperature is 50℃, the time is 8h, and the rotation speed is 500rpm.

[0034] After long-term circulation, the new energy battery coolant is prone to breed bacteria and other microorganisms. The present application improves the antibacterial performance of bamboo fiber by modifying it with plant polyacid. The hydrogen bond between the abundant phenolic hydroxyl groups on the surface of the plant polyacid and the hydroxyl groups of the bamboo fiber allows the plant polyacid to be loaded on the surface of the bamboo fiber. The synergistic effect of the antibacterial properties of the bamboo fiber and the antibacterial properties of the plant polyacid effectively solves the problem of microbial breeding in new energy battery coolant. In the present application, when the plant polyacid is a mixture of chlorogenic acid and tannic acid, the obtained new energy battery coolant not only has excellent antibacterial performance, but also improves its corrosion resistance. This may be because the free phenolic hydroxyl groups of chlorogenic acid and tannic acid form chelate bonds with metal ions, forming a dense chelate protective layer on the metal surface, inhibiting the oxidation reaction of the metal.

[0035] In some embodiments of the present application, the D50 of the nanobohmite is 40-300nm, Ca 2+ <20ppm, Fe 3+ <10ppm, Cu 2+ <5ppm, Na + <50ppm.

[0036] In a preferred embodiment of the present application, the D50 of the nanobohmite is 40-80nm, Ca 2+ <10ppm, Fe 3+ <5ppm, Cu 2+ <5ppm, Na + <5ppm.

[0037] The new energy battery cooling liquid obtained by modifying bamboo fiber with plant polyacid has good antibacterial effect, but bamboo fiber is flammable, which has certain safety risk, and the application introduces nano boehmite, the application adopts nano boehmite with D50 of 40-300nm, Ca 2+ <20ppm, Fe 3+ <10ppm, Cu 2+ <5ppm, Na + <50ppm, which has high specific surface area and layered structure, can decompose and release crystal water under high temperature to form a dense aluminum oxide barrier to reduce the risk of combustion; meanwhile, the nano boehmite forms a heat conduction network to improve the heat conductivity of the new energy battery cooling liquid, and the application introduces a specific acrylic block polymer to improve the dispersibility of the nano boehmite and bamboo fiber, and further improve the antibacterial property and heat conductivity of the new energy battery cooling liquid.

[0038] The application is based on the combined action of plant polyacid modified bamboo fiber, nano boehmite and acrylic block polymer, and by controlling the mass ratio of the plant polyacid modified bamboo fiber, nano boehmite and acrylic block polymer to be 1:1:1-3, the antibacterial new energy battery cooling liquid has excellent antibacterial property, heat conductivity, flame retardancy and corrosion resistance.

[0039] In some embodiments of the application, the defoaming agent is an organic silicon defoaming agent.

[0040] In some embodiments of the application, the organic silicon defoaming agent is selected from at least one of BYK-018, BYK-019, BYK-021 and BYK-022.

[0041] In a preferred embodiment of the application, the organic silicon defoaming agent is BYK-021.

[0042] In some embodiments of the application, the pH regulator is selected from at least one of triethanolamine and phosphate buffer.

[0043] In a preferred embodiment of the application, the pH regulator is triethanolamine.

[0044] The second aspect of the application provides a preparation method of the antibacterial new energy battery cooling liquid with high heat conductivity, which comprises the following steps: mixing ethylene glycol, corrosion inhibitor, acrylic block polymer, plant polyacid modified bamboo fiber, nano boehmite, defoaming agent and deionized water uniformly, and adding a pH regulator to adjust the pH to 7.5-8.5 to obtain the antibacterial new energy battery cooling liquid.

[0045] Compared with the prior art, the application has the following beneficial effects:

[0046] The application is based on plant polyacid modified bamboo fiber, nano boehmite and acrylic block polymer, wherein the plant polyacid (chlorogenic acid and tannic acid) modified bamboo fiber improves its antibacterial performance and corrosion resistance; the nano boehmite reduces the risk of combustion and improves the thermal conductivity; the acrylic block polymer improves the dispersibility of the nano boehmite and the bamboo fiber, and further improves the antibacterial performance and the thermal conductivity of the new energy battery coolant; by controlling the mass ratio of the plant polyacid modified bamboo fiber, the nano boehmite and the acrylic block polymer to be 1:1:1-3, the three together make the antibacterial new energy battery coolant have excellent antibacterial performance, thermal conductivity, flame retardancy and corrosion resistance. DETAILED DESCRIPTION

[0047] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments will be described in detail.

[0048] The application will be further described below with reference to the examples, but the application is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to different requirements of specific use, and the implementation conditions not mentioned are the conventional conditions in the industry. The technical features involved in each embodiment of the present application can be combined with each other as long as they do not conflict with each other.

[0049] In the following examples and comparative examples, the raw materials used are all from commercial sources or prepared by conventional methods in the art, unless otherwise specified.

[0050] Example 1

[0051] A high-thermal-conductivity antibacterial new energy battery coolant, the raw material composition is as follows in mass percentage: ethylene glycol 45%, corrosion inhibitor 0.2%, defoaming agent 0.02%, plant polyacid modified bamboo fiber 0.1%, nano boehmite 0.1%, acrylic block polymer 0.2%, deionized water to make up the balance to 100%, and pH adjuster to adjust the pH to 8.0.

[0052] The corrosion inhibitor is a mixture of azole corrosion inhibitor and p-hydroxybenzoic acid ester corrosion inhibitor in a mass ratio of 1:1.

[0053] The azole corrosion inhibitor is benzotriazole (CAS: 95-14-7).

[0054] The p-hydroxybenzoic acid ester corrosion inhibitor is methyl p-hydroxybenzoate (CAS: 99-76-3).

[0055] The plant polyacid is a mixture of chlorogenic acid and tannic acid in a mass ratio of 1:1.

[0056] The chlorogenic acid is purchased from Zhangjiajie Jiurui Biological Technology Co., Ltd., product specification: purity greater than or equal to 98%.

[0057] The tannic acid was purchased from Zhangjiajie Jiurui Biotechnology Co., Ltd., with a product specification of purity greater than or equal to 99%.

[0058] The bamboo fiber is bamboo fiber powder, the mesh number of the bamboo fiber powder is 200 mesh, and it is purchased from Sichuan Banbo Bamboo Industry Development Co., Ltd.

[0059] The preparation method of the plant polyacid-modified bamboo fiber comprises the following steps: uniformly mixing the plant polyacid and deionized water, adding the bamboo fiber to carry out stirring reaction, and washing and drying the bamboo fiber after the reaction is completed.

[0060] The mass ratio of the plant polyacid to deionized water is 3:100.

[0061] The mass ratio of the plant polyacid to the bamboo fiber is 0.3:1.

[0062] The stirring reaction was carried out at a temperature of 50° C., a time of 8 h, and a rotation speed of 500 rpm.

[0063] The D50 of the nano-boehmite is 40-80nm, Ca 2+ <10ppm, Fe 3+ <5ppm, Cu 2+ <5ppm, Na + <5ppm, purchased from Suzhou Baird New Material Technology Co., Ltd., model: BOE-500.

[0064] The defoaming agent is an organosilicon defoaming agent, and the organosilicon defoaming agent is BYK-021, which is purchased from Shanghai Buding Chemical Co., Ltd.

[0065] The acrylic acid block polymer is Haoyi AF-5718, which was purchased from Guangzhou Haoyi New Materials Technology Co., Ltd.

[0066] The pH adjuster is triethanolamine (CAS: 102-71-6).

[0067] The preparation method of the above-mentioned high thermal conductivity antibacterial new energy battery coolant is: ethylene glycol, corrosion inhibitor, acrylic block polymer, plant polyacid modified bamboo fiber, nano-boehmite, defoaming agent, and deionized water are mixed evenly, and a pH regulator is added to adjust the pH to 8.0.

[0068] Example 2

[0069] The application discloses a new energy battery cooling liquid with high thermal conductivity and bacteriostasis, which is prepared from the following raw materials in percentage by mass: 55% of ethylene glycol, 0.3% of corrosion inhibitor, 0.03% of defoaming agent, 0.2% of plant polyacid modified bamboo fiber, 0.2% of nano boehmite, 0.4% of acrylic block polymer, deionized water in a residual amount to reach 100%, and a pH regulator for adjusting the pH value to 8.0.

[0070] The corrosion inhibitor is a mixture of azole corrosion inhibitor and p-hydroxybenzoic acid ester corrosion inhibitor at a mass ratio of 1:1.

[0071] The azole corrosion inhibitor is benzotriazole (CAS: 95-14-7).

[0072] The p-hydroxybenzoic acid ester corrosion inhibitor is methyl p-hydroxybenzoate (CAS: 99-76-3).

[0073] The plant polyacid is a mixture of chlorogenic acid and tannic acid at a mass ratio of 1:1.

[0074] The chlorogenic acid is purchased from Zhangjiajie Jiurui Biological Technology Co., Ltd., and has a product specification of a purity of greater than or equal to 98%.

[0075] The tannic acid is purchased from Zhangjiajie Jiurui Biological Technology Co., Ltd., and has a product specification of a purity of greater than or equal to 99%.

[0076] The bamboo fiber is bamboo fiber powder, the bamboo fiber powder has a mesh number of 200 meshes, and is purchased from Sichuan Banbo Bamboo Industry Development Co., Ltd.

[0077] The preparation method of the plant polyacid modified bamboo fiber is as follows: the plant polyacid and deionized water are uniformly mixed, the bamboo fiber is added to perform stirring reaction, and after the reaction is completed, washing and drying are performed to obtain the product.

[0078] The mass ratio of the plant polyacid to the deionized water is 3:100.

[0079] The mass ratio of the plant polyacid to the bamboo fiber is 0.3:1.

[0080] The stirring reaction is performed at a temperature of 50 DEG C for 8 hours at a rotating speed of 500 rpm.

[0081] The nano boehmite has a D50 of 40-80 nm, Ca 2+ <10 ppm, Fe 3+ <5 ppm, Cu 2+ <5 ppm, Na + <5 ppm, and is purchased from Suzhou Beler New Material Technology Co., Ltd., and has a model number of BOE-500.

[0082] The defoaming agent is a silicone defoaming agent, the silicone defoaming agent is BYK-021, and is purchased from Shanghai Budi Chemical Co., Ltd.

[0083] The acrylic block high molecular polymer is Haoyi AF-5718, and is purchased from Guangzhou Haoyi New Material Science and Technology Co., Ltd.

[0084] The pH regulator is triethanolamine (CAS: 102-71-6).

[0085] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is as follows: ethylene glycol, a corrosion inhibitor, an acrylic block high molecular polymer, plant polyacid modified bamboo fiber, nano boehmite, a defoaming agent and deionized water are uniformly mixed, and a pH regulator is added to adjust the pH to 8.0.

[0086] Example 3

[0087] A high-thermal-conductivity bacteriostatic new energy battery cooling liquid, according to mass percentage, the raw material composition is: ethylene glycol 60%, corrosion inhibitor 0.5%, defoaming agent 0.05%, plant polyacid modified bamboo fiber 0.3%, nano boehmite 0.3%, acrylic block high molecular polymer 0.6%, deionized water to make up the balance to 100%, and the pH regulator is adjusted to pH 8.0.

[0088] The corrosion inhibitor is a mixture of azole corrosion inhibitor and p-hydroxybenzoic acid ester corrosion inhibitor in a mass ratio of 1:1.

[0089] The azole corrosion inhibitor is benzotriazole (CAS: 95-14-7).

[0090] The p-hydroxybenzoic acid ester corrosion inhibitor is methyl p-hydroxybenzoate (CAS: 99-76-3).

[0091] The plant polyacid is a mixture of chlorogenic acid and tannic acid in a mass ratio of 1:1.

[0092] The chlorogenic acid is purchased from Zhangjiajie Jiurui Biological Technology Co., Ltd., and the product specification is: purity greater than or equal to 98%.

[0093] The tannic acid is purchased from Zhangjiajie Jiurui Biological Technology Co., Ltd., and the product specification is: purity greater than or equal to 99%.

[0094] The bamboo fiber is bamboo fiber powder, the mesh number of the bamboo fiber powder is 200 mesh, and the bamboo fiber powder is purchased from Sichuan Banbo Bamboo Industry Development Co., Ltd.

[0095] The preparation method of the plant polyacid modified bamboo fiber is as follows: plant polyacid and deionized water are uniformly mixed, bamboo fiber is added for stirring reaction, and after the reaction is completed, washing and drying are performed to obtain the product.

[0096] The mass ratio of the plant polyacid and the deionized water is 3:100.

[0097] The mass ratio of the plant polyacid and the bamboo fiber is 0.3:1.

[0098] The temperature of the stirring reaction is 50°C, the time is 8h, and the rotation speed is 500rpm.

[0099] The D50 of the nanometer boehmite is 40-80nm, Ca 2+ <10ppm, Fe 3+ <5ppm, Cu 2+ <5ppm, Na + <5ppm, purchased from Suzhou Beler New Material Technology Co., Ltd., model: BOE-500.

[0100] The defoaming agent is a silicone defoaming agent, the silicone defoaming agent is BYK-021, and is purchased from Shanghai Boding Chemical Co., Ltd.

[0101] The acrylic block polymer is Haoyi AF-5718, and is purchased from Guangzhou Haoyi New Material Technology Co., Ltd.

[0102] The pH regulator is triethanolamine (CAS: 102-71-6).

[0103] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is as follows: ethylene glycol, corrosion inhibitor, acrylic block polymer, plant polyacid modified bamboo fiber, nanometer boehmite, defoaming agent, and deionized water are uniformly mixed, and a pH regulator is added to adjust the pH to 8.0.

[0104] Comparative Example 1

[0105] The difference from Example 3 is that the plant polyacid modified bamboo fiber is replaced by the same mass of preservative and bactericide, the preservative and bactericide is 1,4-cyclohexane dicarboxylic acid (CAS: 1076-97-7) and zinc sulfate (CAS: 7733-02-0) with a mass ratio of 1.2:1; the rest is the same.

[0106] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is the same as that of Example 3.

[0107] Comparative Example 2

[0108] The difference from Example 3 is that the bamboo fiber is replaced by the same mass of nanometer silicon nitride fiber, purchased from Zhejiang Amet Nano Technology Co., Ltd., model: AM-Si3N4-W-01, specification: nanometer level; the rest is the same.

[0109] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is the same as that in Embodiment 3.

[0110] Comparative Example 3

[0111] The difference from Embodiment 3 is that the plant polyacid modified bamboo fiber is replaced by bamboo fiber of the same quality; the rest are the same.

[0112] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is the same as that in Embodiment 3.

[0113] Comparative Example 4

[0114] The difference from Embodiment 3 is that the acrylic block polymer is replaced by Haoyi AF-5827 purchased from Guangzhou Haoyi New Material Technology Co., Ltd.; the rest are the same.

[0115] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is the same as that in Embodiment 3.

[0116] Comparative Example 5

[0117] The difference from Embodiment 3 is that the nano-boehmite is replaced by alpha-phase nano-alumina of the same quality, the average particle size of the alpha-phase nano-alumina is 20-30 nm, and the alpha-phase nano-alumina is purchased from Zhongke Jinyan (Beijing) Technology Co., Ltd., model: DK410-1; the rest are the same.

[0118] The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid is the same as that in Embodiment 3.

[0119] Comparative Example 6

[0120] The difference from Embodiment 3 is that a high-thermal-conductivity bacteriostatic new energy battery cooling liquid, by mass percentage, the raw material composition is: ethylene glycol 60%, corrosion inhibitor 0.5%, defoaming agent 0.05%, plant polyacid modified bamboo fiber 0.5%, nano-boehmite 0.1%, acrylic block polymer 0.8%, deionized water to make up the balance to 100%, and pH adjuster to adjust the pH to 8.0; the rest are the same.

[0121] The preparation method of the new energy automobile power battery cooling liquid is the same as that in Embodiment 3.

[0122] Test Example: The bacteriostatic new energy battery cooling liquids of Embodiments 1-3 and Comparative Examples 1-6 are subjected to performance tests as shown in Tables 1 and 2.

[0123] Table 1

[0124]

[0125]

[0126] Table 2

[0127]

[0128] As can be seen from Table 1 and Table 2, the bacteriostatic new energy battery cooling liquid provided by the embodiments 1-3 of the present application has high bacteriostatic property, low conductivity, high thermal conductivity, high flame retardancy and high corrosion resistance at the same time;

[0129] In the comparative example 1, the plant multi-acid modified bamboo fiber is replaced by the same quality of preservative fungicide, and the bacteriostatic property and corrosion resistance of the obtained bacteriostatic new energy battery cooling liquid are obviously decreased;

[0130] In the comparative example 2, the bamboo fiber is replaced by the same quality of nano silicon nitride fiber, and the bacteriostatic property, flame retardancy and corrosion resistance of the obtained bacteriostatic new energy battery cooling liquid are obviously decreased;

[0131] In the comparative example 3, the plant multi-acid modified bamboo fiber is replaced by the same quality of bamboo fiber, and the bacteriostatic property, flame retardancy and corrosion resistance of the obtained bacteriostatic new energy battery cooling liquid are obviously decreased;

[0132] In the comparative example 4, the acrylic block high molecular polymer is replaced by another polymer dispersant, and the flame retardancy and corrosion resistance of the obtained bacteriostatic new energy battery cooling liquid are obviously decreased;

[0133] In the comparative example 5, the nano boehmite is replaced by the same quality of alpha phase nano alumina, and the thermal conductivity and flame retardancy of the obtained bacteriostatic new energy battery cooling liquid are obviously decreased;

[0134] In the comparative example 6, the mass ratio of the plant multi-acid modified bamboo fiber, the nano boehmite and the acrylic block high molecular polymer is not in the preferred range, and the thermal conductivity and flame retardancy of the obtained bacteriostatic new energy battery cooling liquid are obviously decreased.

[0135] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A high-thermal-conductivity bacteriostatic new energy battery cooling liquid, characterized in that, The raw materials include, by mass percentage, ethylene glycol 40-60%, corrosion inhibitor 0.2-0.5%, acrylic block polymer 0.2-0.8%, plant polyacid modified bamboo fiber 0.1-0.3%, nano boehmite 0.1-0.3%, defoaming agent 0.01-0.05%, deionized water to make up the balance to 100%, and pH adjuster to adjust the pH to 7.5-8.

5. The plant polyacid is a mixture of chlorogenic acid and tannic acid, and the mass ratio of the two is 1-2:1-2. 2.The high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to claim 1, characterized in that, The mass ratio of the plant polyacid modified bamboo fiber, nano boehmite and acrylic block polymer is 1:1:1-3. 3.The high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to claim 2, characterized in that, The corrosion inhibitor includes azole corrosion inhibitor and p-hydroxy benzoic acid ester corrosion inhibitor in a mass ratio of 1-2:

1. 4.The high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to claim 3, characterized in that, The azole corrosion inhibitor is at least one of benzotriazole and methyl benzotriazole; and the p-hydroxy benzoic acid ester corrosion inhibitor is at least one of methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate and propyl p-hydroxybenzoate. 5.The high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to claim 1, characterized in that, The acrylic block polymer is at least one of BASF PX 4585 and Haoyi AF-5718. 6.The high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to claim 1, characterized in that, The preparation method of the plant polyacid modified bamboo fiber includes the following steps: uniformly mixing plant polyacid and deionized water, adding bamboo fiber for stirring reaction, washing and drying after the reaction to obtain the product. 7.The high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to claim 1, characterized in that, The D50 of the nanobohmite is 40-300 nm, Ca 2+ <20 ppm, Fe 3+ <10 ppm, Cu 2+ <5 ppm, Na + <50 ppm.

8. The preparation method of the high-thermal-conductivity bacteriostatic new energy battery cooling liquid according to any one of claims 1-7, characterized in that, The preparation method includes the following steps: The ethylene glycol, corrosion inhibitor, acrylic block polymer, plant polyacid modified bamboo fiber, nano boehmite, defoaming agent and deionized water are uniformly mixed, and the pH adjuster is added to adjust the pH to 7.5-8.5 to obtain the product.

Images