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Method for low-temperature start-up for liquid fuel cell system

A liquid fuel cell and low-temperature technology, which is applied in the direction of fuel cells, fuel cell additives, and fuel cell heat exchange, can solve problems such as low-temperature start-up technology that is rarely involved, and achieve the effect of improving the adaptability of low-temperature environments and expanding the scope of application

Active Publication Date: 2019-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] On the whole, the low-temperature start-up technology of methanol fuel cell system is rarely involved

Method used

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  • Method for low-temperature start-up for liquid fuel cell system
  • Method for low-temperature start-up for liquid fuel cell system
  • Method for low-temperature start-up for liquid fuel cell system

Examples

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Effect test

Embodiment 1

[0031] Taking direct methanol fuel cell (DMFC) as an example, according to figure 1 way to connect the various components. Among them, 1 is a battery for preheating, which is used for preheating the catalytic burner to provide electric energy. 2 is a heating wire or a heating sheet, which is used to convert electric energy into heat energy for preheating the catalytic burner. 3 is a catalytic combustion air pump, which provides air for the catalytic burner. The 4th, fuel pump, provides the fuel of stable flow for catalytic combustion. 5 is a fuel tank, which is used to store fuel for catalytic combustion. 6 is an electric control board, which is used to supply power to the executive device and control its operation. 7 is a gas-liquid separator, which separates the carbon dioxide gas in the anode material and the water in the cathode material. At the same time dilute the added high-concentration fuel or pure fuel. 8 is a fuel cell stack, which directly converts the chemic...

Embodiment 2

[0034] Taking direct methanol fuel cell (DMFC) as an example, according to figure 1Connect the various components in the same manner as in Example 1. Among them, the air pump can choose YLKTECH company DA50EE; the fuel pump can choose KNF company NF11; the heater can choose 12VDC, 50W model; the lithium battery can choose 3 strings of 6 parallel 18650 lithium iron phosphate groups. Before the fuel cell is frozen, the aqueous solution in the system is pumped out, and the stack is purged with nitrogen gas, leaving only a small amount of water. After the freezing is completed, close the switch of the fuel cell system and turn on the debugging mode, so that only the liquid pump works. Close the switch of the catalytic combustion module, and the system will automatically preheat and start the catalytic burner. When the temperature of the fuel cell stack reaches 30°C, inject an aqueous solution into the system, and turn on the fuel cell switch to start at low temperature. When the...

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Abstract

The invention belongs to the field of liquid fuel cells. The invention relates to a method for low-temperature fast start-up of a liquid fuel cell system. The method is characterized in that organic small molecular substances such as methanol and ethanol are used as fuel and catalytically combusted in a catalytic combustor, and the heat generated by combustion is directly or indirectly used to heat an electric pile through an electric pile heating chamber and / or to heat a water and heat management component in the system, so as to quickly start the liquid fuel cell system at low temperature. Compared with the prior art, the method helps to start the liquid fuel cell system at low temperature, improve the low-temperature environment adaptability of liquid fuel cells and expand the application scope of liquid fuel cells.

Description

technical field [0001] The invention belongs to the field of liquid fuel cells. Specifically, it is a method for starting a liquid fuel cell at low temperature. Through the catalytic combustion of organic fuel, the exhaust gas is used to heat the internal stack and water heat management components of the system to realize the low-temperature start-up of the liquid fuel cell system and expand its application range Background technique [0002] A liquid fuel cell is a chemical reaction device that converts the chemical energy of liquid fuel into electrical energy. Due to the advantages of high theoretical specific energy density and simple system, this type of battery has broad application prospects in the field of portable mobile power. [0003] As a mobile power source, in addition to high discharge performance, liquid fuel cells also need to have good stability and environmental adaptability. Under low temperature conditions, on the one hand, the electrode reactivity is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04302H01M8/1011H01M8/04014
CPCY02E60/50
Inventor 孙海麻胜南孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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