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Alcohol fuel cell liquid supply system and working method thereof

A technology of fuel cells and fuel cell stacks, which is applied in the direction of fuel cells, circuits, electrical components, etc., and can solve the problems of high price, low precision, and short service life

Pending Publication Date: 2022-04-12
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methanol concentration meters currently on the market have the following problems: short service life (less than 2000 hours), high price and low accuracy

Method used

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  • Alcohol fuel cell liquid supply system and working method thereof
  • Alcohol fuel cell liquid supply system and working method thereof
  • Alcohol fuel cell liquid supply system and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides an alcohol fuel cell liquid supply system.

[0036] Such as figure 2 As shown, an alcohol fuel cell liquid supply system includes: a fuel cell stack, an air supply system, a water tank and a liquid fuel supply system, the air supply system is respectively connected to the fuel cell stack and the water tank, and the water tank is connected to A liquid fuel supply system, the liquid fuel supply system includes a methanol tank, a fuel pump, a fuel tank and a water pump, the methanol tank is connected to the fuel tank through the fuel pump, and the fuel tank is connected to the water tank through the water pump;

[0037] An ammeter is connected in series with the external circuit of the fuel cell stack, the ammeter is connected to the control circuit, and the control circuit is connected to the fuel pump;

[0038] The control circuit controls the working start time of the fuel pump according to the output current measured by the ammeter, so that t...

Embodiment approach

[0049] As one or more implementations, the working time interval of the fuel pump is determined by a control circuit.

[0050] As one or more implementations, the fuel cell stack includes several fuel cell units.

[0051] As one or more embodiments, the air supply system includes a filter, a control pump and a condenser, the filter is connected to an air pump, the air pump is connected to a fuel cell stack, and the fuel cell stack is connected to a condenser .

[0052] As one or more embodiments, air is pressurized by an air pump and enters the cathode of each fuel cell unit in the fuel cell stack, and undergoes a cathode reaction to generate water, and the excess air and water are discharged from the fuel cell stack together, and then enter the condenser , the water vapor in it condenses into liquid water, and the liquid water flows into the water tank through the recovery pipeline.

[0053] As one or more implementations, a circulation pump is connected between the fuel ce...

Embodiment 2

[0057] This embodiment provides a working method of the alcohol fuel cell liquid supply system.

[0058] A working method of an alcohol fuel cell liquid supply system, characterized in that the alcohol fuel cell liquid supply system described in Embodiment 1 is used, comprising:

[0059] Obtain the output current value of the fuel cell stack;

[0060] The control circuit obtains the working time interval of the fuel pump according to the output current value, combined with the working time ratio of the fuel pump and the working time of the fuel pump, and controls the fuel pump to start working according to the working time interval of the fuel pump and the working time of the fuel pump Time, so that the methanol concentration in the fuel tank is within the set range;

[0061] Among them, the working time ratio of the fuel pump=the working time of the fuel pump / the total working time of the fuel cell, the working time of the fuel pump=the fuel consumption when the fuel cell st...

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Abstract

The invention provides an alcohol fuel cell liquid supply system and a working method thereof. The system comprises a fuel cell stack, an air supply system, a water tank and a liquid fuel supply system, the air supply system is respectively connected with the fuel cell stack and the water tank, the water tank is connected with the liquid fuel supply system, and the liquid fuel supply system comprises a methanol tank, a fuel pump, a fuel tank and a water pump. The methanol tank is connected with a fuel tank through a fuel pump, and the fuel tank is connected with a water tank through a water pump; a galvanometer is connected in series with an external circuit of the fuel cell stack and connected with a control circuit, and the control circuit is connected with the fuel pump; and the control circuit controls the working start time of the fuel pump according to the output current measured by the galvanometer, so that the methanol concentration in the fuel tank is within a set range.

Description

technical field [0001] The invention belongs to the field of alcohol fuel cells, and in particular relates to a liquid supply system for alcohol fuel cells and a working method thereof. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Direct Alcohol Fuel Cells (DAFC) are similar to Hydrogen Fuel Cells (PEMFC), except that instead of using hydrogen as fuel, alcohols and other organic molecules are directly used as fuel. A direct alcohol fuel cell is an energy conversion device that converts the chemical energy of small organic molecules and oxygen into electrical energy. [0004] Most of the current research work is aimed at the direct methanol fuel cell (DMFC) using methanol as fuel. Its working principle is as follows: Methanol is converted into carbon dioxide, protons (hydrogen nuclei or hydrogen ions) and electrons at the anode. Like a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04186H01M8/04537H01M8/04791
CPCY02E60/50
Inventor 郭振夏中峰刘阳梁琦石文荣张丽
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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