Preparation method of new energy power battery cooling liquid capable of improving storage stability

Abstract

The invention discloses a manufacturing method of a new energy power battery cooling liquid capable of improving storage stability, and belongs to the technical field of battery anti-freezing solutions, and the new energy power battery cooling liquid comprises the following auxiliary agent components and components: a) ethylene glycol which is used as a basic solvent and accounts for 40-50% of the total mass; b) deionized water accounting for 50%-60% of the total mass; c) an organic corrosion inhibitor which is selected from benzotriazole, mercaptobenzothiazole or a mixture of benzotriazole and mercaptobenzothiazole and accounts for 0.3-0.5% of the total mass; d) an antioxidant which is selected from di-tert-butyl-p-cresol, triphenyl phosphite or a mixture thereof and accounts for 0.1-0.2% of the total mass; the anti-foaming agent is selected from polydimethylsiloxane, silicone oil or a mixture of the polydimethylsiloxane and the silicone oil and accounts for 0.01%-0.05% of the total mass; and f) a pH regulator which is selected from sodium hydroxide, potassium hydroxide or a mixture thereof, is used for regulating the pH value of the cooling liquid to a suitable range of 7-9, and accounts for 0.05-0.15% of the total mass. The cooling liquid disclosed by the invention can keep the stability of key indexes such as conductivity, pH value, corrosion inhibition performance and oxidation resistance in a long-term storage process, so that the storage stability of the cooling liquid is remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of battery antifreeze technology, specifically relating to a method for manufacturing a coolant for new energy power batteries that can improve storage stability. Background Technology

[0002] With the rapid development of new energy technologies, the performance stability and safety of power batteries, as core components of new energy vehicles, are receiving increasing attention from the industry. Coolant, as a crucial component of the power battery thermal management system, has a vital impact on battery performance and lifespan.

[0003] Traditional coolants often suffer from fluctuations in key indicators such as conductivity, pH value, corrosion inhibition performance, and antioxidant performance during long-term storage due to factors such as insufficiently refined manufacturing processes, unreasonable component ratios, and low purity of raw materials, thus affecting their performance. Summary of the Invention

[0004] The purpose of this invention is to address existing problems by providing a method for manufacturing coolant for new energy power batteries that can improve storage stability.

[0005] This invention is achieved through the following technical solution: A method for manufacturing a coolant for new energy power batteries to improve storage stability, characterized by comprising the following additive components and their respective values: a) Ethylene glycol: as a base solvent, accounting for 40%-50% of the total mass; b) Deionized water: accounting for 50%-60% of the total mass; c) Organic corrosion inhibitor: selected from benzotriazole, mercaptobenzothiazole or mixtures thereof, accounting for 0.3%-0.5% of the total mass; d) Antioxidant: selected from di-tert-butyl-p-cresol, triphenyl phosphite or mixtures thereof, accounting for 0.1%-0.2% of the total mass; e) Antifoaming agent: selected from polydimethylsiloxane, silicone oil or mixtures thereof, accounting for 0.01%-0.05% of the total mass; f) pH adjuster: selected from sodium hydroxide, potassium hydroxide or mixtures thereof, used to adjust the pH value of the coolant to a suitable range of 7-9, accounting for 0.05%-0.15% of the total mass; The sum of the mass percentages of the above components is 100%. Furthermore, the ethylene glycol has a purity of over 99.9% to ensure the thermal stability and low electrical conductivity of the coolant.

[0006] Furthermore, the deionized water is prepared using multi-stage reverse osmosis and ion exchange technology, and has a conductivity of less than 5 micro Siemens / cm to avoid adverse effects on the power battery.

[0007] Furthermore, it also includes the following steps: a) Preliminary mixing: In a clean, uncontaminated mixing vessel, first add a certain amount of ethylene glycol, then slowly add deionized water and perform preliminary mixing. The mixing speed should be controlled at 200-300 rpm, and the mixing time should be no less than 30 minutes to ensure that the ethylene glycol and deionized water are fully mixed and homogeneous. b) Addition and dissolution of additives: In the initially mixed liquid, add organic corrosion inhibitors, antioxidants, antifoaming agents and pH adjusters in sequence, control the addition rate of additives to avoid generating a large amount of foam or local overheating, and continue stirring to ensure that each additive is fully dissolved and can play its role. c) Fine adjustment and homogenization: By adjusting the stirring speed and time, the coolant is made homogenized to ensure that the components are evenly distributed in the coolant; d) Filtration and purification: The coolant is filtered using a precision filter with an accuracy of less than 1 micrometer to remove any impurities and undissolved particles, ensuring the clarity and purity of the coolant. e) Storage stability test: The prepared coolant is sealed in packaging and stored in a cool, dry, and well-ventilated place, avoiding direct sunlight and high temperatures. Storage stability tests are conducted simultaneously to evaluate the performance changes of the coolant during long-term storage, such as conductivity, pH value, corrosion inhibition properties, and oxidation resistance.

[0008] Furthermore, the storage stability test includes storing the coolant under specific conditions (temperature 25±5℃, humidity 50%±10%RH) and testing its performance every three months to ensure that the coolant maintains stable performance during long-term storage.

[0009] The present invention has the following advantages over the prior art: 1. Significantly improved storage stability: Through a refined manufacturing process and optimized component ratio, especially the use of high-purity ethylene glycol and deionized water prepared through multi-stage reverse osmosis and ion exchange technology, as well as carefully selected additives, the coolant of the present invention can maintain the stability of key indicators such as conductivity, pH value, corrosion inhibition performance and antioxidant performance during long-term storage, thereby significantly improving its storage stability.

[0010] 2. Enhanced Battery Protection: The selected organic corrosion inhibitors effectively prevent corrosion of internal metal components of the power battery, extending its lifespan. Simultaneously, the addition of antioxidants resists the performance degradation caused by oxidation of the coolant during use, further protecting battery performance.

[0011] 3. High thermal conductivity: Ethylene glycol, as the base solvent, has the characteristics of high boiling point and low freezing point. Furthermore, the coolant formulation of this invention, through the optimization of component ratio, ensures that the coolant has good thermal conductivity and can maintain a high-efficiency heat dissipation effect within the operating temperature range of the power battery. Detailed Implementation Example

[0012] A method for manufacturing a coolant for new energy power batteries to improve storage stability, characterized by comprising the following additive components and their respective values: a) Ethylene glycol: as the base solvent, accounting for 45% of the total mass; b) Deionized water: accounting for 54.5% of the total mass; c) Organic corrosion inhibitor: selected from a mixture of benzotriazole and mercaptobenzothiazole, accounting for 0.3% of the total mass; d) Antioxidant: selected from a mixture of di-tert-butyl-p-cresol and triphenyl phosphite, accounting for 0.1% of the total mass; e) Antifoaming agent: selected from a mixture of polydimethylsiloxane and silicone oil, accounting for 0.02% of the total mass; f) pH adjuster: selected from a mixture of sodium hydroxide and potassium hydroxide, used to adjust the pH value of the coolant to 8, accounting for 0.08% of the total mass.

[0013] The ethylene glycol has a purity of 99.99% to ensure the thermal stability and low electrical conductivity of the coolant.

[0014] The deionized water is prepared using multi-stage reverse osmosis and ion exchange technology, and has a conductivity of 3 micro Siemens / cm to avoid adverse effects on the power battery.

[0015] Furthermore, it also includes the following steps: a) Preliminary mixing: In a clean, uncontaminated mixing vessel, first add a certain amount of ethylene glycol, then slowly add deionized water and perform preliminary mixing. The mixing speed is controlled at 300 rpm and the mixing time is 40 minutes to ensure that the ethylene glycol and deionized water are fully mixed and homogeneous. b) Addition and dissolution of additives: In the initially mixed liquid, add organic corrosion inhibitors, antioxidants, antifoaming agents and pH adjusters in sequence, control the addition rate of additives to avoid generating a large amount of foam or local overheating, and continue stirring to ensure that each additive is fully dissolved and can play its role. c) Fine adjustment and homogenization: By adjusting the stirring speed and time, the coolant is made homogenized to ensure that the components are evenly distributed in the coolant; d) Filtration and purification: The coolant is filtered using a precision filter with an accuracy of 1 micron to remove any impurities and undissolved particles, ensuring the clarity and purity of the coolant. e) Storage stability test: The prepared coolant is sealed in packaging and stored in a cool, dry, and well-ventilated place, avoiding direct sunlight and high temperatures. Storage stability tests are conducted simultaneously to evaluate the performance changes of the coolant during long-term storage, such as conductivity, pH value, corrosion inhibition properties, and oxidation resistance.

[0016] Furthermore, the storage stability test includes storing the coolant under specific conditions (temperature 25°C, humidity 50%RH) and testing its performance every three months to ensure that the coolant maintains stable performance during long-term storage.

[0017] Performance indicators of this embodiment of the new energy power battery coolant manufacturing method that can improve storage stability:

[0018] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, shall be within the protection scope of the present invention as long as they do not exceed the spirit covered by the specification.

Claims

1. A method for manufacturing a new energy power battery coolant with improved storage stability, characterized in that: Includes the following auxiliary ingredients and the values ​​of each component: a) Ethylene glycol: as the base solvent, accounting for 40%-50% of the total mass; b) Deionized water: 50%-60% of the total mass; c) Organic corrosion inhibitor: selected from benzotriazole, mercaptobenzothiazole or a mixture thereof, accounting for 0.3%-0.5% of the total mass; d) Antioxidant: selected from di-tert-butyl-p-cresol, triphenyl phosphite or a mixture thereof, accounting for 0.1%-0.2% of the total mass; e) Anti-foaming agent: selected from polydimethylsiloxane, silicone oil or a mixture thereof, accounting for 0.01%-0.05% of the total mass; f) pH regulator: selected from sodium hydroxide, potassium hydroxide or a mixture thereof, accounting for 0.05%-0.15% of the total mass; The sum of the mass percentages of the above components is 100%.

2. The manufacturing method according to claim 1, characterized in that: The purity of the ethylene glycol reaches over 99.9% to ensure the thermal stability and low conductivity of the coolant.

3. The manufacturing method according to claim 1, characterized in that: The deionized water is prepared by multi-stage reverse osmosis and ion exchange technology, and has an electrical conductivity of less than 5 microSiemens / cm to avoid adverse effects on power batteries.

4. The manufacturing method according to claim 1, characterized in that: The following steps are also included: a) Preliminary mixing: In a clean, pollution-free stirring kettle, first add a certain amount of ethylene glycol, then slowly add deionized water, and perform preliminary stirring. The stirring speed is controlled at 200-300 rpm, and the stirring time is not less than 30 minutes; b) Addition and dissolution of additives: Add organic corrosion inhibitor, antioxidant, antifoaming agent and pH regulator to the liquid after preliminary mixing in sequence while continuing to stir; c) Fine adjustment and homogenization: By adjusting the stirring speed and time, the coolant is homogenized to ensure that each component is evenly distributed in the coolant; d) Filtration and purification: Use a precision filter with a precision of less than 1 micron to filter the coolant to remove possible impurities and undissolved particles; e) Storage stability test: The prepared coolant is sealed and stored in a cool, dry, well-ventilated place to avoid direct sunlight and high temperature. At the same time, a storage stability test is performed to evaluate the performance changes of the coolant during long-term storage, such as conductivity, pH value, corrosion inhibition and antioxidant properties.

5. The manufacturing method according to claim 4, characterized in that: The storage stability test includes storing the coolant under specific conditions (temperature of 25±5°C, humidity of 50%±10%RH) and regularly testing its performance every three months.

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