Fuel cell cooling liquid and preparation method thereof

A fuel cell and coolant technology, applied in fuel cells, chemical instruments and methods, circuits, etc., can solve the problem of not meeting the high-load heat dissipation requirements of high-power density fuel cells, affecting the performance life of fuel cells, and affecting the overall performance of fuel cells, etc. problems, to achieve the effect of being suitable for mass production and commercial promotion, good insulation, and improved thermophysical properties

Pending Publication Date: 2021-03-09
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Therefore, if the traditional fuel cell coolant is used to improve the heat transfer effect, the main method is to increase the heat transfer area and increase the flow rate of the working medium, which will lead to a larger fuel cell cooling system and increased power consumption of pumping auxiliary equipment, which will greatly affect overall performance of the fuel cell
On the other hand, the maximum working temperature range of proton exchange membrane fuel cell (PEMFC) is 60-80°C. The temperature difference between the battery stack and the environment to increase the heat transfer rate
[0006] A comprehensive analysis of the current traditional fuel cell coolant has the characteristics of low thermal conductivity and poor heat transfer capacity, which can no longer meet the high-load heat dissipation requirements of high-power-density fuel cells. This contradiction is even more important for fuel cell systems operating under high-temperature environmental conditions In order to highlight, it is necessary to develop a new type of cooling fluid with high heat exchange

Method used

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  • Fuel cell cooling liquid and preparation method thereof

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Effect test

Embodiment 1

[0030] Such as figure 1 Shown, choose TiO 2 Thermally conductive powder, with a particle size range of about 80nm, is calcined at high temperature for 4 hours under oxygen ambient conditions, and the temperature is controlled at 500°C.

[0031] After waiting for the heat-conducting powder to cool down, pour it into an ultra-fine nano-bead mill for forced grinding for 2 hours.

[0032] Weighed by a balance, mixed the heat-conducting powder and the ethylene glycol organic liquid in a mass ratio of 1:8, and ultrasonically oscillated at a frequency of 20 MHz for 16 hours to form a suspension mixture.

[0033] Add deionized water with a conductivity of less than 0.1 μs / cm to the mixture, the mixing mass ratio is 1:1, and mechanically stir for 5 hours.

[0034] A polyethylene glycol-type nonionic surfactant was added to the mixture, and the mass proportion of the surfactant was 0.2%, and mechanically stirred for 6 hours to fully adsorb the surfactant on the surface of the particle...

Embodiment 2

[0039] Select Al 2 o 3 Thermally conductive powder, with a particle size range of about 50nm, is calcined at high temperature for 6 hours under nitrogen ambient conditions, and the temperature is controlled at 600°C.

[0040] After waiting for the heat-conducting powder to cool down, pour it into an ultra-fine nano-bead mill for forced grinding for 3 hours.

[0041] Weigh with a balance, mix the thermally conductive powder and ethylene glycol organic liquid at a mass ratio of 1:12, and ultrasonically vibrate at a frequency of 20 MHz for 16 hours to form a suspension mixture.

[0042]Add deionized water with a conductivity of less than 0.1 μs / cm to the mixture, the mixing mass ratio is 1:1, and mechanically stir for 5 hours.

[0043] Add polyoxyethylene-type nonionic surfactant to the mixed solution, the mass ratio of surfactant is 0.4%, and mechanically stir for 6 hours, so that the surfactant is fully adsorbed on the particle surface.

[0044] Add a polyether-modified poly...

Embodiment 3

[0048] Select ZnO thermally conductive powder with a particle size range of about 30nm, and calcinate at high temperature for 4 hours under oxygen ambient conditions, and the temperature is controlled at 500°C.

[0049] After waiting for the heat-conducting powder to cool down, pour it into an ultra-fine nano-bead mill for forced grinding for 2 hours.

[0050] Weighed by a balance, mixed the heat-conducting powder and the ethylene glycol organic liquid in a mass ratio of 1:10, and ultrasonically oscillated at a frequency of 20 MHz for 16 hours to form a suspension mixture.

[0051] Add deionized water with a conductivity of less than 0.1 μs / cm to the mixture, the mixing mass ratio is 1:1, and mechanically stir for 5 hours.

[0052] Sodium dodecylbenzenesulfonate nonionic surfactant was added to the mixed solution, the surfactant mass ratio was 0.6%, and mechanically stirred for 6 hours, so that the surfactant was fully adsorbed on the particle surface.

[0053] Add a polyethe...

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Abstract

The invention discloses a fuel cell cooling liquid and a preparation method thereof, wherein the fuel cell cooling liquid comprises, by mass, 2-97% of an ethylene glycol organic liquid, 2-97% of deionized water, 0.1-13% of heat conduction powder, 0.1-5% of a surfactant and 0.2-1% of an antifoaming agent. The method comprises: carrying out high frequency ultrasonic oscillation and mechanical stirring treatment on the raw materials, so that the periphery of heat conduction powder particles is compactly coated with the surfactant so as to form a stable suspended mixed liquid; and removing conductive ions in the liquid through anion-cation exchange resin treatment to obtain the cooling liquid for the fuel cell. The fuel cell cooling liquid prepared by the method has good thermal conductivity and excellent insulativity, can meet the use requirements of the fuel cell cooling liquid, is simple in preparation process, easy in parameter control and low in cost, and is suitable for batch production and commercial popularization.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a novel cooling liquid for improving the heat transfer efficiency of fuel cells and a preparation method thereof. Background technique [0002] The principle of fuel cell power generation is that the chemical energy of hydrogen and oxygen is electrochemically reacted to generate electricity. Hydrogen dissociates into hydrogen ions at the anode. After passing through the proton exchange membrane, it reacts with oxygen at the cathode to generate water. Electrons arrive from the anode through an external circuit. The cathode forms a current loop on the external circuit. This power generation method has the characteristics of cleanness, no pollution, no noise, and no infrared. It is considered to be the preferred efficient and clean power generation technology in the 21st century, and it is also an ideal mobile power technology. Military backup power supply, underwate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/10H01M8/04029
CPCC09K5/10H01M8/04029Y02E60/50Y02P70/50
Inventor 花仕洋王傲李海港徐增师胡旦
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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