Measuring method for internal resistance of fuel cell

A measurement method and fuel cell technology, applied in the direction of fuel cell additives, measuring electricity, measuring devices, etc., can solve the problems of expensive equipment and long test time

Inactive Publication Date: 2009-07-01
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the test time is long and the equipment is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Connect the PU tube of the monolithic stack, turn on the hydrogen gas of the activation station, the flow rate of the hydrogen gas is 0.1L / min, after 10 minutes, add the two electrodes of the constant current source to the junction of the stack, and connect the two ends of the voltmeter to the At the junction of the stack, adjust the current value of the constant current source to 1mA, and read the voltage value V after 5 minutes 1 is 0.26mV; switch the current direction of the constant current source, and after 5 minutes of stabilization, read the value of the voltmeter V 2 is 0.26mV, the calculated average value is V=(0.26+0.26) / 2=0.26mV, and the internal resistance R of the membrane electrode at this current value is calculated according to Ohm's law R=U / I to be 260mΩ. According to the above method, the resistance of the fuel cell under the conditions of 10mA, 100mA, 1A, and 10A were respectively measured, and the results are shown in Table 1.

[0015] Table 1 Volta...

Embodiment 2

[0021] Connect the PU tube of the monolithic stack, turn on the hydrogen gas in the activation station, the flow rate of the hydrogen gas is 1L / min, and after 15 minutes, add the two electrodes of the constant current source to the wiring of the stack, and connect the two ends of the voltmeter to the electric stack. At the stacking wiring, adjust the current value of the constant current source to 10mA, and read the voltage value V after 4 minutes 1 0.15mV; switch the current direction of the constant current source, after 4 minutes of stabilization, read the value of the voltmeter V 2 is 0.15mV, calculate the average value V=(V 1 +V 2 ) / 2, according to Ohm's law R=U / I, the internal resistance R of the membrane electrode under this current value is calculated to be 15mΩ. The resistance of the fuel cell under the conditions of 100mA, 1A, 3A, 5A, 8A and 10A were respectively measured according to the above method, and the results are shown in Table 3.

[0022] Table 3 Voltage...

Embodiment 3

[0026] Connect the PU tube of the monolithic stack, turn on the hydrogen gas in the activation station, the flow rate of the hydrogen gas is 10L / min, after 20 minutes, add the two electrodes of the constant current source to the wiring of the stack, and connect the two ends of the voltmeter to the electric stack. At the stacking wiring, adjust the current value of the constant current source to 10mA, and read the voltage value V after 10 minutes 1 It is 0.17mV; switch the current direction of the constant current source, and after 10 minutes of stabilization, read the value of the voltmeter V 2 is 0.17mV, calculate the average value V=(V 1 +V 2 ) / 2, according to Ohm's law R=U / I, the internal resistance R of the membrane electrode under this current value is calculated to be 17mΩ. The resistance of the fuel cell under the conditions of 100mA, 1A, 3A, 5A, 8A and 10A were respectively measured according to the above method, and the results are shown in Table 4.

[0027] Table ...

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Abstract

The invention discloses a measurement method for the internal resistance of fuel cell, which is characterized by comprising: feeding hydrogen gas of 0.001 to 10L/min at two sides of a fuel cell MEA; after 10 to 20min, connecting a constant current source and a voltage meter; adjusting the current of the constant current source to 0.1 to 10A; after 4 to 10min, reading the voltage value V1 of the voltage meter; switching the current direction of the constant current source; after 4 to 10min, reading the voltage value V2 of the voltage meter; calculating an average value V=(V1+V2)/2; according to ohms law as R=U/I, calculating the internal resistance R of the membrane electrode. The measurement method has the advantages of simple application and accurate measurement result, belonging to the internal resistance test field of fuel cells.

Description

technical field [0001] The invention relates to a method for measuring the internal resistance of a fuel cell, in particular to a method for measuring the internal resistance of a fuel cell stack Background technique [0002] A fuel cell is a device that converts chemical energy into electrical energy through fuel combustion reactions in the battery. The negative electrode serves as the common interface between the fuel and the electrolyte, and also catalyzes the oxidation reaction of the fuel; while the positive electrode is the common interface between oxygen and the electrolyte. Catalyzes the reduction reaction of oxygen. Fuel cells are divided into phosphoric acid type (PAFC, phosphate fuel cell), molten carbonate type (MCFC, melt carbonate fuel cell), solid oxide type (SOFC, solidoxide fuel cell) and proton exchange membrane type (PEMFC, proton exchange membrane fuel cell). Among them, the proton exchange membrane fuel cell (PEMFC) can work in a low temperature enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/14G01R31/36H01M8/04
Inventor 肖钢侯晓峰孙永欣
Owner HANERGY TECH
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