CN115584246A - Battery coolant and graphene liquid cooling plate thereof - Google Patents
Battery coolant and graphene liquid cooling plate thereof Download PDFInfo
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- CN115584246A CN115584246A CN202211410752.6A CN202211410752A CN115584246A CN 115584246 A CN115584246 A CN 115584246A CN 202211410752 A CN202211410752 A CN 202211410752A CN 115584246 A CN115584246 A CN 115584246A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application relates to the technical field of battery cooling, and specifically discloses a battery coolant and a graphene liquid cooling plate thereof. The battery cooling liquid comprises the following raw materials in parts by weight: 80-90 parts of propylene glycol, 10-20 parts of a toluene solution, 5-8 parts of a sulfonate dispersant, 1-2 parts of an antifreezing agent, 1-2 parts of an antirust agent, 1-2 parts of a mildew preventive and a pH regulator, wherein the pH regulator is used for regulating the pH value of the cooling liquid to 7-8; the utility model provides a graphite alkene liquid cooling board, includes foretell liquid cooling board and the graphite alkene board that a battery coolant liquid made, and graphite alkene board and battery are connected, and the liquid cooling board is located the one side that graphite alkene board kept away from the battery to be connected with the graphite alkene board. The battery coolant has the effect of increasing the fluidity of propylene glycol in winter and improving the cooling effect of the battery coolant.
Description
Technical Field
The application relates to the field of battery cooling technology, more specifically, it relates to a battery coolant liquid and graphite alkene liquid cooling board thereof.
Background
The new energy automobile battery is used as a power source of an automobile, the heating of charging and discharging points can exist all the time, and the performance of the power battery is closely related to the temperature of the battery. The existing power battery cooling system has air-conditioning cooling type, liquid cooling type and air cooling type. The working principle of the liquid-cooled power battery cooling system is as follows: the electric cooling liquid pump conveys cooling liquid through the cooling liquid circulation loop, so that the power battery is cooled.
In the related art, the patent with the application number of CN202110943511.7 discloses an environment-friendly anhydrous cooling liquid, which comprises 1-6 parts by weight of a metal corrosion inhibitor, 0.3-1 part by weight of a fluorinated liquid, 0.3-2 parts by weight of a dispersing agent, 0.01-4 parts by weight of an antifoaming agent, 0.26-0.9 part by weight of an acid-base regulator and 90-140 parts by weight of an antifreezing agent; the antifreezing agent is ethylene glycol and/or propylene glycol.
In view of the above-mentioned related art, the inventors believe that since the anhydrous coolant is mainly composed of ethylene glycol or propylene glycol, it has good fluidity at high temperature and is therefore commonly used in racing cars; however, the ordinary vehicle uses the anhydrous cooling liquid, and the phenomena of unsmooth flow of the anhydrous cooling liquid and poor cooling effect may occur in winter.
Disclosure of Invention
In order to improve the flowability of the anhydrous cooling liquid in winter and improve the cooling effect; the application provides a battery coolant and a graphene liquid cooling plate thereof.
In a first aspect, the present application provides a battery coolant, which adopts the following technical scheme:
the battery cooling liquid comprises the following raw materials in parts by weight: 80-90 parts of propylene glycol, 10-20 parts of toluene solution, 5-8 parts of sulfonate dispersant, 1-2 parts of antifreezing agent, 1-2 parts of antirust agent, 1-2 parts of mildew preventive and pH regulator, wherein the pH regulator is used for regulating the pH value of the cooling liquid to 7-8.
By adopting the technical scheme, the toluene has higher ignition point and lower freezing solidification point, the solidification point of the toluene is-95 ℃, and the toluene is in a liquid state and is usually used as a solvent, so that the flowability is better; and the propylene glycol occupying the larger part of the cooling liquid is viscous at normal temperature, and the viscosity is further enhanced along with the reduction of the temperature, so that the mobility of the propylene glycol in winter can be increased by adding the toluene, and the cooling effect of the battery cooling liquid is improved.
The sulfonate dispersant can uniformly mix toluene, propylene glycol and other additives, increase the contact area of toluene and propylene glycol and increase the flowability of propylene glycol in winter; and the sulfonate dispersant can play roles of rust prevention and cleaning, is low in price, economical and practical, and is suitable for being added into battery cooling liquid.
Optionally, the sulfonate dispersant is sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, sodium hexadecyl sulfonate or alpha-olefin sulfonate.
By adopting the technical scheme, the sodium dodecyl benzene sulfonate, the sodium dodecyl sulfate, the sodium hexadecyl sulfonate or the alpha-olefin sulfonate can be used as a dispersing agent to disperse solid particles and can be used as a surfactant to reduce the surface tension between two mutually insoluble phases, so that the mixing uniformity of the cooling liquid is better, and the fluidity is improved more.
Optionally, the solvent of the toluene solution is ethanol.
By adopting the technical scheme, the ethanol has higher ignition point and freezing point of-114 ℃, is suitable for being used as cooling liquid, and the toluene can be well dissolved with the ethanol; propylene glycol and ethanol can be mutually dissolved, so that the mixing uniformity of the battery cooling liquid is better.
Optionally, in the toluene solution, the volume ratio of toluene to ethanol is 1: (0.1-0.5).
By adopting the technical scheme and the proper volume ratio of the toluene to the ethanol, the toluene can be well mixed with the propylene glycol through the ethanol solvent, and the uniformly mixed battery cooling liquid is obtained.
Optionally, the cooling liquid has a pH of 7.5 to 8.
By adopting the technical scheme, the cooling liquid with proper pH can effectively inhibit the acidification of alcohols, does not influence the alcohols to reduce the freezing point of the antifreezing solution, and has antifreezing and anti-boiling performances.
Optionally, the pH regulator is a boric acid buffer solution or a phosphoric acid buffer solution.
By adopting the technical scheme, the borate and the phosphate have the anti-corrosion effect, so that the boric acid buffer solution or the phosphoric acid buffer solution is used for adjusting the pH value of the battery cooling liquid, and the anti-corrosion effect on the battery can be realized.
Optionally, the cooling liquid comprises the following preparation steps:
s1: mixing and stirring propylene glycol, a sulfonate dispersant, an antifreeze, an antirust agent and a mildew preventive to obtain a primary battery coolant;
s2: adding the toluene solution into the primary battery cooling liquid, mixing and stirring to obtain a battery cooling liquid stock solution;
s3: and adjusting the pH of the stock solution of the battery cooling liquid by using a pH regulator to obtain the battery cooling liquid.
By adopting the technical scheme, the toluene is added into the S2, and the primary battery cooling liquid is added, so that the toluene can be uniformly mixed with the primary battery cooling liquid more quickly, and the cooling liquid is obtained.
Optionally, in S2, after stirring, the method further includes the following steps: and introducing the battery cooling liquid into anion and cation mixed exchange resin, and removing ions to obtain the battery cooling liquid stock solution.
By adopting the technical scheme, the aim of anion and cation mixed exchange resin is to remove redundant ions in the cooling liquid, reduce the conductivity of the cooling liquid, not influence the proton exchange of the fuel cell and obtain the battery cooling liquid with better quality.
In a second aspect, the present application provides a graphene liquid cooling plate, which adopts the following technical scheme:
the utility model provides a graphite alkene liquid cooling board, includes foretell liquid cooling board and the graphite alkene board that a battery coolant liquid made, and graphite alkene board and battery are connected, and the liquid cooling board is located the one side that graphite alkene board kept away from the battery to be connected with the graphite alkene board.
By adopting the technical scheme, the graphene film has excellent thermal conductivity, and further promotes the conduction of heat on the surface of the battery to the cooling liquid, so that the surface of the battery is uniformly cooled, and the temperature uniformity of the surface of the battery is improved.
Optionally, a polytetrafluoroethylene hose is inlaid on the liquid cooling plate surface, and the battery cooling liquid circularly flows in the polytetrafluoroethylene hose.
Through adopting above-mentioned technical scheme, the tetrafluoroethylene hose is not stained with oil and is not stained with water, can accelerate the mobile speed of coolant liquid in the tetrafluoroethylene hose to improve the cooling effect of graphite alkene liquid cold plate.
In summary, the present application has the following beneficial effects:
1. in the application, the toluene is in a liquid state and is usually used as a solvent, and a mobile phase is better; the propylene glycol occupying the larger part of the cooling liquid is viscous at normal temperature, and the viscosity is further enhanced along with the reduction of the temperature, so that the mobility of the propylene glycol in winter can be increased by adding the toluene, and the cooling effect of the battery cooling liquid is improved;
2. in the application, the ethanol has a high ignition point and a freezing point of-114 ℃, is suitable for being used as a cooling liquid, and the toluene and the ethanol can be well dissolved mutually; the propylene glycol and the ethanol can be mutually dissolved, so that the mixing uniformity of the battery cooling liquid is better;
3. in this application, the coolant liquid of suitable pH can effectively restrain the acidizing of alcohols material, does not influence alcohols material and reduces the freezing point of antifreeze liquid, has prevent frostbite, anti-boiling performance.
Drawings
Fig. 1 is a schematic diagram for illustrating the structure of a graphene liquid cooling plate.
Description of reference numerals: 1. a liquid-cooled plate; 2. a graphene plate; 3. a polytetrafluoroethylene hose; 4. a battery.
Detailed Description
The present application will be described in further detail with reference to examples and comparative examples.
The following examples and comparative examples are provided as raw material sources: the materials of the examples and comparative examples are commercially available as antifreeze, type: 987, brand: hongtai; antirust agent, type: BL-W2, brand: bolaifelter chemical industry; mildew preventive, type: BIT20, available from Changzhou gold Shield New Material science and technology, inc.; the concentration of the boric acid buffer solution is 0.1mol/L; the anion and cation exchange resin is anion and cation exchange resin D201, which is purchased from Jinda Zhengtong environmental protection technology Limited, tianjin; the toluene was 1,3,5-trimethylbenzene, analytically pure: 97 percent.
Examples of a Battery Cooling liquid
Example 1
A battery cooling liquid is prepared by the following steps:
s1: mixing 80g of propylene glycol, 5g of sodium dodecyl benzene sulfonate, 2g of antifreezing agent, 1g of antirust agent and 2g of mildew preventive, and stirring at the speed of 500rpm for 20min to obtain primary battery cooling liquid;
s2: adding 20g of toluene solution into the primary battery cooling liquid, wherein the solvent of the toluene solution is ethanol, the volume ratio of the toluene to the ethanol is 1.25, stirring at 4000rpm for 15min, introducing the battery cooling liquid into anion and cation mixed exchange resin, and removing ions to obtain a battery cooling liquid stock solution;
s3: and regulating the pH of the stock solution of the battery cooling liquid to 7.5 by using a boric acid buffer solution to obtain the battery cooling liquid.
Example 2
A battery cooling liquid is prepared by the following steps:
s1: mixing 90g of propylene glycol, 8g of sodium hexadecyl sulfonate, 1g of antifreezing agent, 2g of antirust agent and 1g of mildew preventive, and stirring at the speed of 500rpm for 20min to obtain primary battery cooling liquid;
s2: adding 10g of toluene solution into the primary battery cooling liquid, wherein the solvent of the toluene solution is ethanol, the volume ratio of the toluene to the ethanol is 1.25, stirring at 4000rpm for 15min, introducing the battery cooling liquid into anion and cation mixed exchange resin, and removing ions to obtain a battery cooling liquid stock solution;
s3: and (4) regulating the pH value of the stock solution of the battery cooling liquid to 7.5 by using a phosphoric acid buffer solution to obtain the battery cooling liquid.
Example 3
The preparation method of the battery coolant comprises the following steps:
s1: mixing 85g of propylene glycol, 6.5g of sodium dodecyl benzene sulfonate, 1.5g of antifreezing agent, 1.5g of antirust agent and 1.5g of mildew preventive, and stirring at 500rpm for 20min to obtain primary battery cooling liquid;
s2: adding 15g of toluene solution into the primary battery cooling liquid, wherein the solvent of the toluene solution is ethanol, the volume ratio of the toluene to the ethanol is 1.25, stirring at 4000rpm for 15min, introducing the battery cooling liquid into anion and cation mixed exchange resin, and removing ions to obtain a battery cooling liquid stock solution;
s3: and regulating the pH of the stock solution of the battery cooling liquid to 7.5 by using a boric acid buffer solution to obtain the battery cooling liquid.
Example 4
The difference from example 3 is that in S2, the volume ratio of toluene to ethanol is 1.
Example 5
The difference from example 3 is that in S2, the volume ratio of toluene to ethanol is 1.
Example 6
The difference from example 3 is that in S3, the pH of the battery coolant stock solution was adjusted to 8 using a boric acid buffer solution.
Comparative example 1
The difference from example 3 is that in S2, the toluene solution was replaced with an equal weight of water.
Comparative example 2
The difference from example 3 is that in S2, the toluene solution was replaced with toluene of equal weight.
Comparative example 3
The difference from example 3 is that in S2, sodium dodecylbenzenesulfonate is replaced with an equal weight of vinyl bis stearamide.
Comparative example 4
The difference from example 3 is that in S3, the pH of the battery coolant stock solution was adjusted to 5 using a phosphoric acid buffer solution.
Comparative example 5
The anhydrous cooling liquid purchased in the market, love warm brand NPG + anhydrous cooling liquid.
Performance test
The performance test was performed using the cooling liquids prepared in examples 1 to 6 and comparative examples 1 to 5, and the viscosity and boiling point at 25 ℃ were measured; and (3) detecting an instrument: the HTYZL-H full-automatic tension tester comprises a plurality of brake fluid detectors DY23F; the test results are shown in table 1; the viscosities of the cooling liquids of example 3 and comparative example 5 at different temperatures were measured; the test results are shown in table 2;
TABLE 1
| Viscosity (MPa.s) | Boiling point (. Degree.C.) | |
| Example 1 | 6.5 | 120 |
| Example 2 | 6.7 | 113 |
| Example 3 | 5.8 | 123 |
| Example 4 | 7.2 | 115 |
| Example 5 | 7.5 | 112 |
| Example 6 | 6.3 | 121 |
| Comparative example 1 | 10.3 | 143 |
| Comparative example 2 | 8.5 | 117 |
| Comparative example 3 | 7.6 | 114 |
| Comparative example 4 | 7.3 | 112 |
| Comparative example 5 | 45 | 191 |
TABLE 2
By combining examples 1 and 2 and 3, it can be seen that the refrigerating fluid prepared by the refrigerating fluid raw material ratio within the protection range of the present application has a low viscosity, and the boiling point meets the boiling point of normal use.
In combination with examples 3 and 4, 5, it can be seen that the ratio of toluene to ethanol is different in the three examples, thereby affecting the viscosity and boiling point of the resulting refrigerating fluid, and it is proved that the ratio of toluene to ethanol is important, and the volume ratio of toluene to ethanol is preferably 1.25.
By combining examples 3 and 6 and comparative example 4, it can be seen that when the pH value of the refrigerating fluid is in the range of 7-8, the prepared refrigerating fluid has lower viscosity and proper boiling point; when the pH value of the refrigerating fluid is in the range of 7-8, the viscosity of the prepared refrigerating fluid is increased.
By combining example 3 with comparative examples 1 and 2, it can be seen that the toluene solution of the present application was replaced with water or analytically pure toluene to produce a frozen liquid with reduced viscosity, demonstrating that the toluene solution of the present application could not be replaced at will.
Combining example 3 and comparative example 3, it can be seen that the replacement of the sulfonic acid dispersant with vinyl bis stearamide also has an effect on the viscosity of the resulting refrigerating fluid, which is higher than that of example 3, demonstrating that the sulfonic acid dispersant of the present application cannot be replaced at will.
In table 2, it can be seen from the combination of example 3 and comparative example 5 that the refrigerating fluid prepared in example 3 still flows naturally at its viscosity as the temperature decreases, while the refrigerating fluid prepared in comparative example 5 does not flow normally at its viscosity at-10 ℃ and coagulates directly at-25 ℃; compared with the commercial anhydrous cooling liquid, the anhydrous cooling liquid can still be normally used in common automobiles in winter.
Embodiment of graphene liquid cooling plate
Referring to fig. 1, a graphite alkene liquid cooling board includes liquid cooling board 1 and graphite alkene board 2, and graphite alkene board 2 and 4 laminating of battery to fixed connection, liquid cooling board 1 and the 2 laminating of graphite alkene board, and fixed connection. Inlay on the liquid cooling board 1 and be equipped with polytetrafluoroethylene hose 3, polytetrafluoroethylene hose 3 is snakelike form on liquid cooling board 1 and arranges, and liquid cooling board 1 inlays the one side and the laminating of graphite alkene board 2 of establishing polytetrafluoroethylene hose 3. The battery coolant prepared in example 3 was flowed through the polytetrafluoroethylene hose 3 by an electric coolant pump.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The battery cooling liquid is characterized by comprising the following raw materials in parts by weight: 80-90 parts of propylene glycol, 10-20 parts of toluene solution, 5-8 parts of sulfonate dispersant, 1-2 parts of antifreezing agent, 1-2 parts of antirust agent, 1-2 parts of mildew preventive and pH regulator, wherein the pH regulator is used for regulating the pH value of the cooling liquid to 7-8.
2. The battery coolant of claim 1, wherein the sulfonate dispersant is sodium dodecylbenzene sulfonate, sodium dodecylsulfonate, sodium hexadecyl sulfonate, or an alpha-olefin sulfonate.
3. The battery coolant of claim 1 wherein the solvent of the toluene solution is ethanol.
4. The battery coolant of claim 1, wherein the toluene solution has a volume ratio of toluene to ethanol of 1: (0.1-0.5).
5. The battery coolant of claim 1 wherein the coolant has a pH of 7.5 to 8.
6. The battery coolant of claim 1, wherein the pH adjuster is a boric acid buffer solution or a phosphoric acid buffer solution.
7. The battery coolant according to claim 1, comprising the following preparation steps:
s1: mixing and stirring propylene glycol, sulfonate dispersant, antifreeze, antirust and mildewproof agent to obtain primary battery coolant;
s2: adding the toluene solution into the primary battery cooling liquid, mixing and stirring to obtain a battery cooling liquid raw material;
s3: and adjusting the pH of the stock solution of the battery cooling liquid by using a pH regulator to obtain the battery cooling liquid.
8. The battery coolant of claim 7, wherein the step of stirring in S2 further comprises the steps of: and introducing the battery cooling liquid into anion and cation mixed exchange resin, and removing ions to obtain a battery cooling liquid raw material.
9. A graphene liquid cooling plate, comprising a liquid cooling plate (1) and a graphene plate (2) made of a battery coolant according to any one of claims 1 to 8, wherein the graphene plate (2) is connected to a battery (4), and the liquid cooling plate (1) is located on a side of the graphene plate (2) away from the battery (4) and is connected to the graphene plate (2).
10. The graphene liquid cooling plate according to claim 9, wherein a polytetrafluoroethylene hose (3) is embedded on a surface of the liquid cooling plate (1), and a battery cooling liquid circulates in the polytetrafluoroethylene hose (3).
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