JP2007066590A - Characteristic measuring method and device of fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a characteristic measuring method capable of executing effective design, evaluation, or control of performance by measuring electric characteristics in detail, and to provide a characteristic measuring device. <P>SOLUTION: A cathode electrode is divided into a cathode main electrode 2A and a cathode divided electrode 2B, and they are electrically separated. An anode electrode is divided into an anode main electrode 3A and an anode divided electrode 3B, and they are electrically separated. An electronic load 5 is connected to between the cathode main electrode 2A and the anode main electrode 3A, a prescribed load on which an AC component having a prescribed frequency is superimposed by controlling the electronic load 5 is applied across the cathode main electrode 2A and the anode main electrode 3A and impedance is measured. Response characteristics of voltage V2 and voltage V3 are obtained in all planned measuring conditions, fitting of parameters to an equipment circuit model of the fuel cell is conducted to make the relation between the overvoltage of the fuel cell and each element clear. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a characteristic measuring method and a characteristic measuring apparatus for measuring electric characteristics of a fuel cell.

  Fuel cells that generate electricity by chemically reacting hydrogen and oxygen are known. Fuel cells are expected to provide a solution to energy and environmental problems.

JP-A-10-116622

  A fuel cell generates various voltage losses due to its power generation principle or its structural reasons. However, simply measuring the output voltage taken from the fuel cell cannot identify how much each voltage loss contributes, and there is sufficient information for post-manufacturing inspection and inspection for deterioration over time. There is a problem that it cannot be obtained. For example, the output voltage alone cannot distinguish whether the voltage loss occurs on the cathode side or on the anode side, and limits the evaluation and management of the performance of the fuel cell.

  It is an object of the present invention to provide a fuel cell characteristic measuring method and characteristic measuring apparatus capable of performing effective evaluation and management on performance by measuring electric characteristics in detail.

In the method for measuring characteristics of a fuel cell according to the present invention, a cathode electrode and an anode electrode are arranged to face each other, the cathode electrode is divided into a cathode main electrode and a cathode split electrode, and the anode electrode is divided into an anode main electrode and an anode split A method of measuring electrical characteristics of a fuel cell that is divided into electrodes, and in which the cathode split electrode and the anode split electrode are arranged to face each other in the same region, the method comprising: And a step of measuring a voltage between the cathode polarization electrode and the anode split electrode in a state where a load is connected between the cathode main electrode and the anode main electrode. And
According to this method for measuring characteristics of a fuel cell, the voltage between the cathode polarization electrode and the anode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured.

In the method for measuring characteristics of a fuel cell according to the present invention, a cathode electrode and an anode electrode are arranged to face each other, the cathode electrode is divided into a cathode main electrode and a cathode split electrode, and the anode electrode is divided into an anode main electrode and an anode split A method of measuring electrical characteristics of a fuel cell that is divided into electrodes, and in which the cathode split electrode and the anode split electrode are arranged to face each other in the same region, the method comprising: Connecting a load to the cathode, and measuring a voltage between the cathode main electrode and the cathode split electrode with a load connected between the cathode main electrode and the anode main electrode. And
According to this method for measuring the characteristics of a fuel cell, the voltage between the cathode main electrode and the cathode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured.

In the method for measuring characteristics of a fuel cell according to the present invention, a cathode electrode and an anode electrode are arranged to face each other, the cathode electrode is divided into a cathode main electrode and a cathode split electrode, and the anode electrode is divided into an anode main electrode and an anode split A method of measuring electrical characteristics of a fuel cell that is divided into electrodes, and in which the cathode split electrode and the anode split electrode are arranged to face each other in the same region, the method comprising: Connecting a load to the cathode, and measuring a voltage between the anode main electrode and the anode split electrode with a load connected between the cathode main electrode and the anode main electrode. And
According to this method for measuring characteristics of a fuel cell, the voltage between the anode main electrode and the anode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured.

  A step of superimposing an AC component on a current flowing through the load may be provided, and the step of measuring the voltage may measure a frequency response of the voltage with respect to the AC component.

  Fitting parameters of an equivalent circuit model of the fuel cell based on the measured frequency response may be provided.

In the fuel cell characteristic measuring apparatus according to the present invention, a cathode electrode and an anode electrode are arranged to face each other, the cathode electrode is divided into a cathode main electrode and a cathode split electrode, and the anode electrode is divided into an anode main electrode and an anode split A measuring device for measuring electrical characteristics of a fuel cell that is divided into electrodes, and in which the cathode divided electrode and the anode divided electrode are arranged to face each other in the same region, comprising: the cathode main electrode and the anode main electrode; An open circuit voltage measuring means is provided for measuring a voltage between the cathode divided electrode and the anode divided electrode with a load connected therebetween.
According to this fuel cell characteristic measuring apparatus, the voltage between the cathode split electrode and the anode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured.

In the fuel cell characteristic measuring apparatus according to the present invention, a cathode electrode and an anode electrode are arranged to face each other, the cathode electrode is divided into a cathode main electrode and a cathode split electrode, and the anode electrode is divided into an anode main electrode and an anode split A measuring device for measuring electrical characteristics of a fuel cell that is divided into electrodes, and in which the cathode divided electrode and the anode divided electrode are arranged to face each other in the same region, comprising: the cathode main electrode and the anode main electrode; Cathode-side overvoltage measuring means for measuring a voltage between the cathode main electrode and the cathode split electrode with a load connected therebetween is provided.
According to this fuel cell characteristic measuring apparatus, since the voltage between the cathode main electrode and the cathode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode, the overvoltage on the cathode side is made independent. Can be measured.

In the fuel cell characteristic measuring apparatus according to the present invention, a cathode electrode and an anode electrode are arranged to face each other, the cathode electrode is divided into a cathode main electrode and a cathode split electrode, and the anode electrode is divided into an anode main electrode and an anode split A measuring device for measuring electrical characteristics of a fuel cell that is divided into electrodes, and in which the cathode divided electrode and the anode divided electrode are arranged to face each other in the same region, comprising: the cathode main electrode and the anode main electrode; An anode-side overvoltage measuring means for measuring a voltage between the anode main electrode and the anode divided electrode with a load connected therebetween is provided.
According to this fuel cell characteristic measuring apparatus, the voltage between the anode main electrode and the anode split electrode is measured in a state where a load is connected between the cathode main electrode and the anode main electrode. Can be measured.

  An alternating current component may be superimposed on the current flowing through the load, and the cathode-side overvoltage measuring unit may measure a frequency response of the voltage with respect to the alternating current component.

  An alternating current component may be superimposed on the current flowing through the load, and the anode-side overvoltage measuring unit may measure a frequency response of the voltage with respect to the alternating current component.

  Fitting means for fitting parameters of an equivalent circuit model of the fuel cell based on the measured frequency response may be provided.

  According to the fuel cell characteristic measuring method of the present invention, the voltage between the cathode polarization electrode and the anode split electrode is measured in a state where a load is connected between the cathode main electrode and the anode main electrode. The voltage can be measured.

  According to the method for measuring characteristics of a fuel cell of the present invention, the voltage between the cathode main electrode and the cathode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured independently.

  According to the fuel cell characteristic measurement method of the present invention, the voltage between the anode main electrode and the anode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured independently.

  According to the fuel cell characteristic measuring apparatus of the present invention, the voltage between the cathode split electrode and the anode split electrode is measured in a state where a load is connected between the cathode main electrode and the anode main electrode. The voltage can be measured.

  According to the fuel cell characteristic measuring apparatus of the present invention, the voltage between the cathode main electrode and the cathode split electrode is measured in a state where a load is connected between the cathode main electrode and the anode main electrode. Can be measured independently.

  According to the fuel cell characteristic measuring apparatus of the present invention, the voltage between the anode main electrode and the anode split electrode is measured with a load connected between the cathode main electrode and the anode main electrode. Can be measured independently.

  Hereinafter, an embodiment of a method for measuring characteristics of a fuel cell according to the present invention will be described with reference to FIGS.

  FIG. 1A is a cross-sectional view showing a configuration of a fuel cell as a measurement target, and FIG. 1B is a plan view seen from the right side of FIG.

  As shown in FIG. 1A, the fuel cell 100 of this embodiment is a solid polymer fuel cell including a solid polymer membrane 1 that partitions the fuel cell 100 into a cathode side and an anode side. On the cathode side, cathode catalyst layers 21A and 21B, cathode diffusion layers 22A and 22B, and a cathode electrode are sequentially laminated from the solid polymer membrane 1 side to the left. On the anode side, anode catalyst layers 31A and 31B, anode diffusion layers 32A and 32B, and an anode electrode are sequentially laminated from the solid polymer membrane 1 side to the right. These layers are formed substantially uniformly in a region where the cathode electrode and the anode electrode are formed, and the cathode electrode and the anode electrode are arranged to face each other.

  A cathode gas flow path 26 is formed between the cathode electrode and the case 4, and a cathode gas flow path 36 is formed between the anode electrode and the case 4. An oxidant (air or oxygen) is applied to the cathode electrode, and a fuel gas is applied to the anode electrode. The shapes of the cathode gas channel 26 and the cathode gas channel 36 are not shown, but these channels are appropriately formed in a shape for controlling the supply amount (concentration) of fuel gas and oxidant.

  As shown in FIGS. 1 (a) and 1 (b), the cathode electrode is divided into a cathode main electrode 2A and a cathode split electrode 2B, which are electrically separated. The anode electrode is divided into an anode main electrode 3A and an anode split electrode 3B, and both are electrically separated. As shown in FIG. 1A and FIG. 1B, the cathode split electrode 2B and the anode split electrode 3B are provided in a relatively small same region of the cathode electrode and the anode electrode, and are arranged to face each other. .

  As shown in FIG. 1A, a terminal 24 is connected to the cathode main electrode 2A, and a terminal 25 is connected to the cathode split electrode 2B, respectively, and is drawn out of the case 4. A terminal 34 is connected to the anode main electrode 3 </ b> A, and a terminal 35 is connected to the anode divided electrode 3 </ b> B, and is drawn out of the case 4.

  FIG. 2 is a diagram showing a method for measuring the electrical characteristics of the fuel cell.

  As shown in FIG. 2, the electronic load 5 is connected between the cathode main electrode 2A and the anode main electrode 3A via the terminal 24 and the terminal 34. Further, the potentials of the cathode main electrode 2A, the cathode divided electrode 2B, the anode main electrode 3A, and the anode divided electrode 3B are measured via the terminal 24, the terminal 25, the terminal 34, and the terminal 35.

  As shown in FIG. 2, during power generation of the fuel cell 100, the cell voltage V between the cathode main electrode 2A and the anode main electrode 3A, the voltage V1 between the cathode split electrode 2B and the anode split electrode 3B, the anode split electrode 3B and the anode main The voltage V2 between the electrodes 3A and the voltage V3 between the cathode split electrode 2B and the cathode main electrode 2A are measured.

  FIG. 3 is a diagram for explaining the voltage characteristics of the fuel cell. As shown in FIG. 3, the cell voltage V is shown as a value obtained by subtracting various overvoltages or loss voltages from the theoretical open circuit voltage Voc. In view of the performance of the fuel cell 100, it is desirable to suppress these overvoltages or loss voltages.

  In general, it is considered that the cathode activation overvoltage Vca1 and the cathode concentration overvoltage Vca2 exist as the cathode overvoltage. The cathode activation overvoltage Vca1 is an overvoltage that depends on the energy required for the chemical reaction on the cathode side, and the cathode concentration overvoltage Vca2 is an overvoltage that depends on the gas concentration on the cathode side. Further, it is considered that an anode activation overvoltage Van1 and an anode concentration overvoltage Van2 exist as the overvoltage on the anode side. The anode activation overvoltage Van1 is an overvoltage that depends on the energy required for the chemical reaction on the anode side, and the anode concentration overvoltage Van2 is an overvoltage that depends on the gas concentration on the anode side. In FIG. 3, the theoretical open circuit voltage Voc is corrected by power generation conditions, that is, temperature and supply gas pressure. Further, the resistance overvoltage Vr including the membrane resistance of each part of the fuel cell 100 is shown collectively on the cathode side.

  The difference between the voltage V1 between the cathode split electrode 2B and the anode split electrode 3B and the theoretical open circuit voltage Voc is considered to correspond to the loss voltage Vco resulting from the fuel crossover through the solid polymer membrane 1.

  In this embodiment, the voltage V2 corresponds to the anode-side overvoltage and the voltage V3 corresponds to the cathode-side overvoltage, and the anode-side overvoltage and the cathode-side overvoltage can be measured separately. Therefore, more detailed and useful information can be obtained as information necessary for performance management.

  These overvoltages can be used as evaluation targets in the inspection after manufacturing of the fuel cell 100 and the inspection at the time of shipment. In addition, by measuring the overvoltage, it is possible to examine the change with time of the fuel cell. For example, in the long term, the permeability of the fuel gas through the solid polymer membrane 1 becomes high due to membrane deterioration or the like, and the overvoltage Vco increases. For this reason, the value of the overvoltage Vco can be used as a management value for determining the degree of film degradation.

  Further, as shown in FIG. 3, there is a relationship of “V1 = V + V2 + V3”. For this reason, when all the voltages V, V1, V2, and V3 are measured, it is possible to perform a verification using the measured values, and to improve the reliability of the measurement.

  By fitting the measurement result of the electrical impedance to an equivalent circuit model, it becomes possible to separate the activation overvoltage, concentration overvoltage, membrane resistance overvoltage, activation overvoltage on the cathode side, and concentration overvoltage on the anode side. This modeling makes it possible to relate each overvoltage to each element (diffusion layer, catalyst layer, membrane) of the fuel cell, and to enable design feedback for improving performance. Further, comparison with an ideal (design) model and difference management are possible for each element in pass / fail judgment at the time of shipment. In the evaluation of deterioration over time, a change in the initial equivalent circuit constant can be used as an index.

  FIG. 4 is a block diagram showing the configuration of a measuring device that measures the electrical characteristics of the fuel cell 100.

  As shown in FIG. 4, the measuring device 70 acquires the voltages V, V1, V2, and V3, the current value taken out by the electronic load, the anode gas temperature and the gas pressure, the cathode gas temperature and the gas pressure. A calculation unit 72 that executes a calculation based on the voltage value obtained via the measurement unit 71, an output unit 73 that outputs a voltage value acquired by the measurement unit 71 or a calculation result in the calculation unit 72, and a measurement unit 71 A calculation unit 72, an output unit 73, and a control unit 74 for controlling the electronic load 5.

  FIG. 5 is a flowchart showing an operation procedure of the measuring apparatus 70. This procedure is executed based on the control of the control unit 74.

  Steps S <b> 1 to S <b> 6 in FIG. 5 show a measurement procedure for separating the DC component of the overvoltage of the fuel cell.

  In step S1 of FIG. 5, the electronic load 5 is controlled so that a predetermined DC load is applied between the cathode main electrode 2A and the anode main electrode 3A, and the DC component is set in a measurable state. Next, in step S2, the measuring unit 71 acquires the voltages V, V1, V2, and V3.

  Next, in step S3, the calculation unit 72 performs verification using the acquired voltages V, V1, V2, and V3, and determines whether normal measurement is being performed. Here, it is determined whether the relationship of “V1 = V + V2 + V3” is established, and if the determination is affirmed, the process proceeds to step S4, and if the determination is negative, the process returns to step S2 to acquire the voltages V, V1, V2, and V3 again. To do.

  In step S4, the acquired data of the voltages V, V1, V2, and V3 are output or stored via the output unit 73. By using the output or stored voltage V1 or V + V2 + V3, the loss voltage Vco caused by the fuel crossover shown in FIG. 3 (Vco is corrected by the gas temperature of the anode, the gas pressure, the gas temperature of the cathode, and the gas pressure). V1 (or obtained by subtracting V + V2 + V3) from the calculated theory Voc can be calculated.

  Next, in step S5, it is determined whether or not measurement has been completed for all scheduled measurement conditions. If the determination is affirmative, the series of processing ends, and if the determination is negative, the direct current value is determined in step S6. And return to step S1. In this case, in step S1, the electronic load 5 is controlled in accordance with the next load condition, and the above measurement procedure (steps S2 to S5) is repeated.

  According to the above procedure, the open circuit voltage V1, the crossover overvoltage Vco, the anode overvoltage V2, the cathode overvoltage V3 including the resistance overvoltage, and the DC component of the cell voltage V are separately measured while changing the measurement conditions. The

  Steps S11 to S23 in FIG. 6 show the AC component measurement procedure.

  In step S11 of FIG. 6, the electronic load 5 is controlled to give a load of a predetermined direct current between the cathode main electrode 2A and the anode main electrode 3A. Next, in step S12, the voltage V, V1, V2, V3, and the current value A are acquired by the measuring unit 71.

  Next, in step S13, the calculation unit 72 performs verification using the acquired voltages V, V1, V2, and V3, and determines whether normal measurement is being performed (V1 = V + V2 + V3). If the determination is affirmative, the process proceeds to step S14, and if the determination is negative, the process returns to step S12 to acquire the voltages V, V1, V2, and V3 again.

  In step S14, the acquired data of the voltages V, V1, V2, V3, and the current value A are output or stored via the output unit 73. By using the output voltage V1 or V + V2 + V3, the loss voltage Vco caused by the fuel crossover shown in FIG. 3 (Vco is the theoretical Voc corrected by the gas temperature of the anode, the gas pressure, the gas temperature of the cathode, and the gas pressure) V1 (or obtained by subtracting V + V2 + V3) can be calculated.

  In step S15, an alternating current having a desired amplitude and frequency is superimposed on the load. In step S16, the waveforms of the voltages V, V1, V2, V3 and current values are acquired. In step S17, impedance calculation is performed.

  Next, in step S18, it is determined whether measurement has been completed for all scheduled measurement conditions, for example, all frequencies. If the determination is affirmative, the process proceeds to step S20, and if the determination is negative, step S19 is performed. To change the frequency of the superimposed alternating current and return to step S15.

  Next, in step S20, it is determined whether or not all scheduled measurement conditions have been completed. If the determination is affirmative, the series of processing ends, and if the determination is negative, the direct current value is changed in step S21. The process returns to step S11. In this case, in step S19, the electronic load 5 is controlled in accordance with the next measurement condition, and the above measurement procedure (steps S12 to S17) is repeated.

  With the above procedure, the response characteristics of the voltage V2 and the voltage V3 when the frequency of the AC component applied to the load between the cathode main electrode 2A and the anode main electrode 3A is changed can be acquired.

  Next, in step S22, the calculation unit 72 performs the fitting of the parameters of the equivalent circuit model of the fuel cell from the frequency characteristics of the impedances of the voltage V2 and the voltage V3, and outputs the result in step S23.

  FIG. 7 is a diagram showing an example of an equivalent circuit model of a fuel cell. In FIG. 7, the capacitor Cca1 and the resistor Rca1 connected in parallel are the reaction impedance of the cathode, the capacitor Cca2 and the resistor Rca2 connected in parallel are the diffusion impedance of the cathode, and the capacitor Can1 and the resistor Ran1 connected in parallel are the reaction impedance of the anode. The capacitor Can2 and the resistor Ran2 connected in parallel correspond to the diffusion impedance of the anode, respectively. The resistance Rir corresponds to the resistance value of the solid polymer film 1 and each contact resistance.

  The cathode activation overvoltage Vca1, cathode concentration overvoltage Vca2, anode activation overvoltage Van1, anode concentration overvoltage Van2 and resistance overvoltage Vr shown in FIG. 3 are respectively the cathode reaction impedance, the cathode diffusion impedance, and the anode reaction. Generated based on impedance, anode diffusion impedance and resistance Rir.

  In step S22, the capacitance values of these capacitors and the resistance values of the resistors are fitted to the model of FIG. 7 based on the phase relationship between the load current and the voltage V2 (or voltage V3) and the frequency characteristics of the gain relationship. In this embodiment, the cathode-side overvoltage can be acquired as the voltage V3, and the anode-side overvoltage can be acquired as the voltage V2. Therefore, the capacitance and resistance values corresponding to the reaction impedance of the cathode and the diffusion impedance of the cathode are based on the frequency characteristics with respect to the voltage V3, the phase of the current and the gain load current, and the capacitance corresponding to the anode reaction impedance and the anode diffusion impedance. The resistance value can be calculated independently based on the voltage V2, the phase of the current, and the frequency characteristics of the gain with respect to the load current. In the conventional fitting from the relationship between the cell voltage V and the load current, modeling to five impedances (reaction, diffusion, resistance) is possible, but the combination is not known.

  Next, in step S23, the calculation result by fitting is output or memorize | stored via the output part 74, and a series of procedures are complete | finished.

  As described above, in the present embodiment, a part of the cathode electrode and the anode electrode arranged to face each other is the cathode divided electrode 2B and the anode divided electrode 3B. For this reason, conditions such as the same positional relationship and gas concentration as the cathode main electrode 2A and the anode main electrode 3A can be given to the cathode divided electrode 2B and the anode divided electrode 3B.

  Even during power generation, the open circuit voltage V1 can be measured. For this reason, it is possible to measure the potential difference (V2, V3) between the anode and cathode terminals during power generation, in other words, the overvoltage between the anode and the cathode separately, and the fitting to the equivalent circuit model is elaborated. Can be.

  In addition, based on the calculated loss voltage Vco resulting from the fuel crossover, cathode-side overvoltage, or anode-side overvoltage, the initial characteristics and changes over time of the fuel cell can be digitized and managed.

  The activation overvoltage is closely related to the design of the catalyst, the concentration overvoltage is related to the diffusion layer and the gas flow path, and the resistance overvoltage is mainly related to the design of the electrolyte membrane. Can be reflected.

  In the above embodiment, the areas of the cathode divided electrode 2B and the anode divided electrode 3B are formed smaller than the cathode main electrode 2A and the anode main electrode 3A, respectively, but the area relationship is not limited.

  FIG. 8A is a plan view showing an example of a fuel cell in which the cathode electrode and the anode electrode are each divided into two equal parts.

  In the example of FIG. 8A, the cathode electrode and the anode electrode are separated into cathode electrodes 102A and 102B and anode electrodes 103A and 103B having the same size, respectively. In this case, as shown in FIG. 8B, an electronic load 5 is connected between the cathode electrode 102A and the anode electrode 103A, the cathode electrode 102A is connected to the cathode main electrode 2A, and the cathode 102B is connected to the cathode divided electrode 2B. The measurement values similar to those of the above embodiment can be obtained by performing measurement with the anode electrode 103A corresponding to the anode main electrode 3A and the anode electrode 103B corresponding to the anode split electrode 3B.

  In this case, as shown in FIG. 8C, when the fuel cell is actually used, the cathode electrode 102A and the cathode electrode 102B, and the anode electrode 103A and the anode electrode 103B are connected to the actual load 6 together, An electric current can be taken out using an electrode. Therefore, it is possible to prevent a decrease in power generation efficiency due to electrode separation.

  The scope of application of the present invention is not limited to the above embodiment. The present invention is not limited to the measurement of electrical characteristics for a polymer electrolyte fuel cell, and can be widely applied to the measurement for all fuel cells.

It is a figure which shows the structure of the fuel cell of this embodiment, (a) is sectional drawing, (b) is a top view. The figure which shows the method of measuring the electrical property of a fuel cell. The figure explaining the voltage characteristic of a fuel cell. The block diagram which shows the structure of the measuring apparatus which measures the electrical property of a fuel cell. The flowchart which shows the operation | movement procedure of a measuring apparatus. The flowchart which shows the operation | movement procedure of a measuring apparatus. The figure which shows an example of the equivalent circuit model of a fuel cell. It is a figure which shows another electrode structure of a fuel cell, (a) is a top view, (b) is a figure which shows the method of measuring an electrical property, (c) shows the connection state at the time of actual use of a fuel cell. Figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solid polymer film 2A Cathode main electrode 2B Cathode division | segmentation electrode 3A Anode main electrode 3B Anode division | segmentation electrode 5 Electronic load (load)
70 measuring device 71 measuring unit (open circuit voltage measuring means, cathode side overvoltage measuring means, anode side overvoltage measuring means)
72 Calculation unit (fitting means)
100 Fuel cell

Claims (11)

A cathode electrode and an anode electrode are disposed to face each other, the cathode electrode is divided into a cathode main electrode and a cathode divided electrode, the anode electrode is divided into an anode main electrode and an anode divided electrode, and the cathode divided electrode and the cathode divided electrode A method for measuring the electrical characteristics of a fuel cell in which anode split electrodes are arranged opposite to each other in the same region,
Connecting a load between the cathode main electrode and the anode main electrode;
Measuring a voltage between the cathode split electrode and the anode split electrode with a load connected between the cathode main electrode and the anode main electrode;
A method for measuring characteristics of a fuel cell, comprising: A cathode electrode and an anode electrode are disposed to face each other, the cathode electrode is divided into a cathode main electrode and a cathode divided electrode, the anode electrode is divided into an anode main electrode and an anode divided electrode, and the cathode divided electrode and the cathode divided electrode A method for measuring the electrical characteristics of a fuel cell in which anode split electrodes are arranged opposite to each other in the same region,
Connecting a load between the cathode main electrode and the anode main electrode;
Measuring a voltage between the cathode main electrode and the cathode split electrode with a load connected between the cathode main electrode and the anode main electrode;
A method for measuring characteristics of a fuel cell, comprising: A cathode electrode and an anode electrode are disposed to face each other, the cathode electrode is divided into a cathode main electrode and a cathode divided electrode, the anode electrode is divided into an anode main electrode and an anode divided electrode, and the cathode divided electrode and the cathode divided electrode A method for measuring the electrical characteristics of a fuel cell in which anode split electrodes are arranged opposite to each other in the same region,
Connecting a load between the cathode main electrode and the anode main electrode;
Measuring a voltage between the anode main electrode and the anode split electrode with a load connected between the cathode main electrode and the anode main electrode;
A method for measuring characteristics of a fuel cell, comprising: Superimposing an alternating current component on the current flowing through the load,
The method for measuring characteristics of a fuel cell according to claim 2 or 3, wherein in the step of measuring the voltage, a frequency response of the voltage with respect to the AC component is measured. The method for measuring characteristics of a fuel cell according to claim 4, further comprising the step of fitting a parameter of an equivalent circuit model of the fuel cell based on the measured frequency response. A cathode electrode and an anode electrode are disposed to face each other, the cathode electrode is divided into a cathode main electrode and a cathode divided electrode, the anode electrode is divided into an anode main electrode and an anode divided electrode, and the cathode divided electrode and the cathode divided electrode A measuring device for measuring electrical characteristics of a fuel cell in which anode divided electrodes are arranged to face each other in the same region,
A fuel cell characteristic comprising: an open circuit voltage measuring means for measuring a voltage between the cathode divided electrode and the anode divided electrode in a state where a load is connected between the cathode main electrode and the anode main electrode. measuring device. A cathode electrode and an anode electrode are disposed to face each other, the cathode electrode is divided into a cathode main electrode and a cathode divided electrode, the anode electrode is divided into an anode main electrode and an anode divided electrode, and the cathode divided electrode and the cathode divided electrode A measuring device for measuring electrical characteristics of a fuel cell in which anode divided electrodes are arranged to face each other in the same region,
A fuel cell characteristic comprising a cathode-side overvoltage measuring means for measuring a voltage between the cathode main electrode and the cathode split electrode in a state where a load is connected between the cathode main electrode and the anode main electrode. measuring device. A cathode electrode and an anode electrode are disposed to face each other, the cathode electrode is divided into a cathode main electrode and a cathode divided electrode, the anode electrode is divided into an anode main electrode and an anode divided electrode, and the cathode divided electrode and the cathode divided electrode A measuring device for measuring electrical characteristics of a fuel cell in which anode divided electrodes are arranged to face each other in the same region,
A fuel cell characteristic comprising an anode-side overvoltage measuring means for measuring a voltage between the anode main electrode and the anode split electrode in a state where a load is connected between the cathode main electrode and the anode main electrode. measuring device. An AC component is superimposed on the current flowing through the load,
8. The fuel cell characteristic measuring apparatus according to claim 7, wherein the cathode-side overvoltage measuring means measures a frequency response of the voltage with respect to the AC component. An AC component is superimposed on the current flowing through the load,
9. The fuel cell characteristic measuring apparatus according to claim 8, wherein the anode-side overvoltage measuring means measures a frequency response of the voltage with respect to the AC component. 11. The fuel cell characteristic measuring apparatus according to claim 9, further comprising a fitting unit that fits a parameter of an equivalent circuit model of the fuel cell based on the measured frequency response.

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