Fuel cell vehicle

Abstract

The purpose of the present invention is to provide a fuel cell vehicle capable of calculating a fuel consumption rate with high accuracy on the basis of the amount of anode gas consumed in a fuel cell. This fuel cell vehicle is provided with a fuel cell, a supply system, a fuel consumption rate calculation device, and a report unit, the fuel consumption rate calculation device comprising: a first calculation unit that calculates the amount of anode gas used on the basis of a value obtained by integrating a power generation current in the fuel cell over time; a second calculation unit that calculates the amount of the anode gas that disappears due to the permeation; a third calculation unit that calculates the consumption amount of the anode gas in the fuel cell on the basis of the total value of the usage amount and the disappearance amount; and a fourth calculation unit that calculates the fuel consumption rate of the fuel cell vehicle on the basis of the consumption amount, and the second calculation unit calculates the disappearance amount on the basis of a value obtained by integrating the disappearance amount per unit time of the anode gas due to permeation per unit time at the power generation time after excluding the time during which the power generation of the fuel cell is stopped.

Description

TECHNICAL FIELD

[0001] The present application relates to a fuel cell vehicle. BACKGROUND

[0002] There is a technique of calculating the consumption amount of anode gas in a fuel cell, taking into account the amount of disappearance of anode gas caused by permeation of anode gas and cathode gas through an electrolyte membrane of the fuel cell (see, for example, Patent Literature 1).

[0003] Patent Literature 1: Japanese Patent Application Publication No. 2010-262841

[0004] In a fuel cell vehicle equipped with such a fuel cell, the fuel consumption rate of the fuel cell vehicle can be calculated based on the consumption amount of anode gas. In the fuel cell vehicle, the fuel cell repeatedly performs power generation and suspension of power generation during running. In the above-described technique, even during such suspension of power generation, the amount of disappearance of anode gas caused by permeation is calculated. Therefore, the consumption amount of anode gas in the fuel cell cannot be calculated with high precision, and it can be impossible to calculate the fuel consumption rate with high precision. SUMMARY

[0005] Therefore, an object of the present application is to provide a fuel cell vehicle capable of calculating a fuel consumption rate with high precision based on the consumption amount of anode gas in a fuel cell.

[0006] The above object can be achieved by a fuel cell vehicle including: a fuel cell that repeatedly performs power generation and suspension of power generation during running; a supply system that supplies anode gas and cathode gas to the fuel cell in such a manner that the respective flow rates of the anode gas and the cathode gas supplied to the fuel cell during the suspension of power generation are lower than those during power generation; a fuel consumption rate calculation device that calculates a fuel consumption rate of the fuel cell vehicle based on a consumption amount of the anode gas in the fuel cell; and a reporting section that reports the fuel consumption rate to a driver, the fuel consumption rate calculation device including: a first calculation section that calculates an amount of use of the anode gas used during power generation in the fuel cell based on a value obtained by time-integrating a power generation current in the fuel cell; a second calculation section that calculates an amount of disappearance of the anode gas caused by permeation of the anode gas and the cathode gas through an electrolyte membrane of the fuel cell; a third calculation section that calculates the consumption amount of the anode gas in the fuel cell based on a total value of the amount of use and the amount of disappearance; and a fourth calculation section that calculates the fuel consumption rate of the fuel cell vehicle based on the consumption amount, the second calculation section calculating the amount of disappearance based on a value obtained by time-integrating a unit time disappearance amount of the anode gas per unit time caused by the permeation, for a power generation time excluding a time during which the fuel cell is in the suspension of power generation.

[0007] It can also be configured to have an acquisition unit that acquires at least one of the pressure of the anode gas, the humidity of the electrolyte membrane, and the temperature of the electrolyte membrane, and the higher the at least one value, the greater the value set by the second calculation unit to the unit time consumption.

[0008] It can also be configured such that the greater the area of the electrolyte membrane, the greater the number of electrolyte membranes, and the thinner the thickness of the electrolyte membrane, the greater the value set in advance to the unit time consumption.

[0009] A fuel cell vehicle capable of calculating a fuel consumption rate with high precision based on the consumption amount of anode gas in a fuel cell can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a brief configuration diagram of a vehicle.

[0011] Figure 2 is a cross-sectional view of a single cell.

[0012] Figure 3 is a flowchart illustrating fuel consumption rate calculation control performed by an ECU.

[0013] Figure 4 is a timing chart illustrating the progress of the usage amount and the consumption amount of anode gas.

[0014] Figure 5 is a flowchart illustrating a modification example of fuel consumption rate calculation control performed by an ECU.

[0015] Figure 6 is an example diagram of a map that defines the relationship between anode gas pressure and unit time consumption.

[0016] REFERENCE NUMERALS

[0017] 1... fuel cell vehicle; 3... ECU (fuel consumption rate calculation device, first calculation unit, second calculation unit, third calculation unit, fourth calculation unit, acquisition unit); 4... fuel cell stack (fuel cell); 7... display (notification unit); 10... cathode gas supply system (supply system); 20... anode gas supply system (supply system); 42... electrolyte membrane. DETAILED DESCRIPTION

[0018] [Configuration of fuel cell vehicle]

[0019] Figure 1is a brief configuration diagram of the fuel cell vehicle 1. The fuel cell vehicle 1 includes an electronic control unit (ECU) 3, a fuel cell (hereinafter referred to as FC) 4, a secondary battery (hereinafter referred to as BAT) 8, a cathode gas supply system 10, an anode gas supply system 20, and a power control system 30. In addition, the fuel cell vehicle 1 includes a cooling system (not shown) that circulates cooling water in the FC 4 to perform cooling. In addition, the fuel cell vehicle 1 is provided with a motor 50 for running, a wheel 5, an accelerator opening sensor 6, and a display (hereinafter referred to as DP) 7. The DP 7 is provided, for example, in an instrument panel of the fuel cell vehicle 1.

[0020] The FC 4 is stacked with a plurality of single cells 4s of a solid polymer electrolyte type that generate electricity by accepting supply of cathode gas and anode gas. A cathode flow path 4c for the cathode gas to flow and an anode flow path 4a for the anode gas to flow are formed in the FC 4.

[0021] Figure 2 is a cross-sectional view of the single cell 4s. The single cell 4s includes a membrane electrode assembly 41, a cathode gas diffusion layer 44c, an anode gas diffusion layer 44a, a cathode separator 45c, and an anode separator 45a. The membrane electrode assembly 41 is sandwiched by the cathode gas diffusion layer 44c and the anode gas diffusion layer 44a. The membrane electrode assembly 41, the cathode gas diffusion layer 44c, and the anode gas diffusion layer 44a are sandwiched by the cathode separator 45c and the anode separator 45a. The cathode flow path 4c is mainly defined between the membrane electrode assembly 41 and the cathode separator 45c, and is a space in which the cathode gas in the cathode gas diffusion layer 44c can flow. The anode flow path 4a is mainly defined between the membrane electrode assembly 41 and the anode separator 45a, and is a space in which the anode gas in the anode gas diffusion layer 44a can flow. The membrane electrode assembly 41 includes an electrolyte membrane 42, a cathode catalyst layer 43c formed on a face of the electrolyte membrane 42 on the cathode flow path 4c side, and an anode catalyst layer 43a formed on a face of the electrolyte membrane 42 on the anode flow path 4a side.

[0022] The cathode gas supply system 10 supplies air containing oxygen as cathode gas to the FC 4, and includes a supply pipe 11, a discharge pipe 12, a bypass pipe 13, an air compressor 14, a three-way valve 15, and a back pressure valve 17. The supply pipe 11 is connected to a cathode inlet manifold of the FC 4. The driving of the air compressor 14, the three-way valve 15, and the back pressure valve 17 is controlled by the ECU 3. The discharge pipe 12 is connected to a cathode outlet manifold of the FC 4. The bypass pipe 13 communicates the supply pipe 11 with the discharge pipe 12. The three-way valve 15 is provided at a connection portion of the supply pipe 11 and the bypass pipe 13. The three-way valve 15 switches the communication state of the supply pipe 11 and the bypass pipe 13. The air compressor 14 and the three-way valve 15 are disposed on the supply pipe 11 in this order from the upstream side. The back pressure valve 17 is disposed on the discharge pipe 12 at a position on the upstream side from the connection portion of the discharge pipe 12 and the bypass pipe 13.

[0023] The air compressor 14 supplies air containing oxygen as cathode gas to the FC 4 via the supply pipe 11. The cathode gas supplied to the FC 4 is discharged via the discharge pipe 12. The back pressure valve 17 adjusts the back pressure on the cathode side of the FC 4. The ECU 3 can adjust the flow rate of the cathode gas supplied to the FC 4 by controlling the rotation speed of the air compressor 14. In addition, the ECU 3 can adjust the flow rate of the cathode gas supplied to the FC 4 and the flow rate of the bypassed cathode gas by controlling the opening degree of the three-way valve 15 and the back pressure valve 17. In addition, instead of the three-way valve 15, a seal valve can be provided on the supply pipe 11, and a shunt valve can be provided on the bypass pipe 13.

[0024] The anode gas supply system 20 supplies hydrogen gas as anode gas to the FC 4, and includes a tank 20T, a supply pipe 21, a discharge pipe 22, a circulation pipe 23, a tank valve 24, a pressure regulating valve 25, an injector (hereinafter referred to as INJ) 26, a gas-liquid separator 27, a drain valve 28, and a circulation pump 29. The driving of the tank valve 24, the pressure regulating valve 25, the INJ 26, and the drain valve 28 is controlled by the ECU 3. The tank 20T is connected to an anode inlet manifold of the FC 4 through the supply pipe 21. Hydrogen gas as anode gas is stored in the tank 20T. The tank valve 24, the pressure regulating valve 25, and the INJ 26 are disposed in this order from the upstream side of the supply pipe 21. One end of the circulation pipe 23 is connected to an anode outlet manifold of the FC 4, the other end of the circulation pipe 23 is connected to the supply pipe 21, and the gas-liquid separator 27 is disposed midway in the circulation pipe 23. One end of the discharge pipe 22 is connected to the gravity direction lower end of the gas-liquid separator 27, the other end of the discharge pipe 22 is connected to the discharge pipe 12 of the cathode gas supply system 10, and the drain valve 28 is provided midway in the discharge pipe 22.

[0025] The opening degree of the pressure regulating valve 25 is adjusted in a state where the tank valve 24 is open, the INJ 26 is open, and thus the anode gas is injected. The anode gas injected from the INJ 26 flows in the supply pipe 21 and is supplied to the FC 4. A pressure sensor S is provided at a position of the supply pipe 21 on a downstream side of the INJ 26 and on an upstream side of an anode inlet manifold of the FC 4. The pressure sensor S detects a pressure at the position of the supply pipe 21 on the downstream side of the INJ 26 as a value representative of a pressure of the anode gas supplied to the FC 4. A gas-liquid separator 27 separates and stores moisture from the anode gas discharged from the FC 4. The water stored in the gas-liquid separator 27 is discharged to the outside of the fuel cell vehicle 1 via the discharge pipes 22 and 12 by opening of a drain valve 28. A circulation pipe 23 is a pipe for recirculating the anode gas discharged from the FC 4 to the FC 4. The anode gas discharged from the FC 4 flows to the supply pipe 21 by a circulation pump 29 and is supplied to the FC 4 together with the anode gas injected from the INJ 26.

[0026] The electric power control system 30 controls discharging of the FC 4 and charging and discharging of the BAT 8. The electric power control system 30 includes a fuel cell DC / DC converter (hereinafter referred to as FDC) 32, a battery DC / DC converter (hereinafter referred to as BDC) 34, a motor inverter (hereinafter referred to as MINV) 38, and an auxiliary machine inverter (hereinafter referred to as AINV) 39. The FDC 32 controls an output current of the FC 4 based on a required current value sent from the ECU 3, and adjusts direct-current electric power from the FC 4 and outputs to the MINV 38 and the AINV 39. The BDC 34 adjusts direct-current electric power from the BAT 8 and outputs to the MINV 38 and the AINV 39. The generated electric power of the FC 4 can be charged into the BAT 8. The MINV 38 converts the input direct-current electric power to three-phase alternating-current electric power and supplies to the motor 50. The motor 50 drives the wheel 5 and causes the fuel cell vehicle 1 to travel.

[0027] The ECU 3 includes a central processing unit (CPU), a read only memory (ROM), and a random access memory (RAM). The ECU 3 is electrically connected to the accelerator opening degree sensor 6, the air compressor 14, the three-way valve 15, the back pressure valve 17, the tank valve 24, the pressure regulating valve 25, the INJ 26, the drain valve 28, the circulation pump 29, the FDC 32, the BDC 34, and the pressure sensor S.

[0028] The ECU 3 calculates a required output to the FC 4 based on a detected value of the accelerator opening degree sensor 6, the driving states of the vehicle auxiliaries and the FC 4 auxiliaries, the electric power stored in the BAT 8, and the like, and calculates a required current value to the FC 4 based on the required output. In addition, the ECU 3 controls the air compressor 14, the INJ 26, and the circulation pump 29 in accordance with the required output to the FC 4, controls the flow rates of the cathode gas and the anode gas supplied to the FC 4, and controls the FDC 32 based on the required current value to the FC 4, thereby controlling the output current of the FC 4.

[0029] In a case where the required output to the FC 4 is less than a prescribed value, the ECU 3 stops power generation of the FC 4. In the stop of the power generation of the FC 4, the ECU 3 stops injection of the anode gas by the INJ 26, and controls the opening degree of the three-way valve 15 so that the rotational speed of the air compressor 14 is reduced or the flow rate of the cathode gas supplied to the FC 4 is reduced. Thus, in the stop of the power generation, the respective flow rates of the anode gas and the cathode gas supplied to the FC 4 are reduced as compared with in the power generation. Further, in the stop of the power generation, in order to maintain the open circuit voltage of the FC 4 to be equal to or more than a prescribed value, the air compressor 14 can be intermittently driven to intermittently supply the cathode gas to the FC 4. In this case, in the stop of the power generation, the flow rate of the cathode gas supplied to the FC 4 is also reduced as compared with in the power generation.

[0030] The ECU 3 calculates a fuel consumption rate of the fuel cell vehicle 1 based on a consumption amount of the anode gas in the FC 4. The consumption amount of the anode gas is calculated based on a usage amount of the anode gas used for power generation in the FC 4 and a disappearance amount of the anode gas that disappears due to permeation. Permeation is a phenomenon in which the anode gas and the cathode gas permeate through the electrolyte membrane 42. The anode gas that permeates from the anode side to the cathode side via the electrolyte membrane 42 does not contribute to power generation, and is discharged to the outside from the discharge pipe 12 of the cathode gas supply system 10. Oxygen in the cathode gas that permeates from the cathode side to the anode side via the electrolyte membrane 42 reacts with hydrogen in the anode gas at the anode side, and generates water. Thus, the anode gas also does not contribute to power generation and disappears. In this way, the anode gas disappears due to permeation without contributing to power generation. The ECU 3 is an example of a fuel consumption rate calculation device. The ECU 3 performs the following fuel consumption rate calculation control by functionally implementing a first calculation section, a second calculation section, a third calculation section, and a fourth calculation section.

[0031] [Fuel consumption rate calculation control]

[0032] Figure 3is a flowchart illustrating fuel consumption rate calculation control performed by the ECU 3. The fuel consumption rate calculation control is repeatedly performed during the ignition switch is on. The ECU 3 calculates the usage amount of the anode gas used in power generation of the FC 4 (step S1). The usage amount is calculated based on a value obtained by accumulating the power generation current of the FC 4 with time. Specifically, the usage amount is calculated based on the following equation (1).

[0033] Usage amount [g] = Power generation current [A] x Time [sec] x Number of cell blocks [pieces] x Faraday constant [A sec / mol] / Number of hydrogen atoms [pieces] x Hydrogen molecular weight [g / mol]... (1)

[0034] The number of cell blocks in equation (1) is the number of blocks of the electrolyte membrane 42 of the FC 4. The Faraday constant, the number of hydrogen atoms, and the hydrogen molecular weight are prescribed fixed values. Therefore, in equation (1) described above, the power generation current and the time are variable values. Step S1 is one example of the process performed by the first calculation section.

[0035] Next, the ECU 3 calculates the disappearance amount of the anode gas caused by permeation (step S2). Specifically, the disappearance amount is calculated based on the following equation (2).

[0036] Disappearance amount [g] = Unit time disappearance amount [g / sec] x Power generation time [sec]... (2)

[0037] The unit time disappearance amount refers to the disappearance amount of the anode gas that disappears due to permeation in power generation of the FC 4. The unit time disappearance amount is a value that is independent of the power generation current and the power generation voltage described above, and in the present embodiment, is a prescribed fixed value. Step S2 is one example of the process performed by the second calculation section.

[0038] Next, the ECU 3 calculates the total value of the usage amount and the disappearance amount described above as the consumption amount [kg] of the anode gas (step S3). Step S3 is one example of the process performed by the third calculation section.

[0039] Next, the ECU 3 calculates the fuel consumption rate of the fuel cell vehicle 1 based on the consumption amount of the anode gas (step S4). For example, the ECU 3 calculates the travel distance [km / kg] of the fuel cell vehicle 1 with respect to the consumption amount of the anode gas as the fuel consumption rate based on the calculated consumption amount [kg] of the anode gas and the travel distance [km] of the fuel cell vehicle 1 corresponding thereto. In addition, the travel distance can also be obtained based on a meter mounted on the fuel cell vehicle 1 and measuring the travel distance, for example. Step S4 is one example of the process performed by the fourth calculation section.

[0040] Next, the ECU 3 reports the fuel consumption rate to the driver by displaying the calculated fuel consumption rate on the DP 7 (step S5). Thereby, the driver can grasp the fuel consumption rate of the fuel cell vehicle 1. Further, the report to the driver can also be made by sound using a speaker mounted on the fuel cell vehicle 1, for example. The DP 7 is one example of a notification portion. By repeating steps S1 to S5 as above, the usage amount and the disappearance amount are accumulated at all times, the fuel consumption is updated to the latest value, and the updated value is displayed on the DP 7.

[0041] Figure 4 is a time chart illustrating the progress of the usage amount and the disappearance amount of the anode gas. In Figure 4 , the progress of the power generation current of the FC 4, the usage amount of the anode gas, and the disappearance amount of the anode gas is shown. In Figure 4 , the power generation current of the FC 4 is shown as a rectangular wave for easy understanding. If the FC 4 generates power from time t1 to t2, the usage amount in this period is calculated based on the value obtained by accumulating the power generation current in this period from time t1 to time t2. Further, the disappearance amount in this period is calculated based on the value obtained by accumulating the unit time disappearance amount for the power generation time from time t1 to t2. The power generation is stopped from time t2 to t3, and therefore both the usage amount and the disappearance amount are calculated as 0. From time t3 to t4, the FC 4 generates power at a higher power generation current than from time t1 to t2. Therefore, the rate of increase of the usage amount in this period is greater than from time t1 to t2. In contrast, as described above, the disappearance amount is independent of the power generation current, and therefore the rate of increase is the same as from time t1 to t2. The same applies to times t5 to t6 and t7 to t8.

[0042] As described above, the disappearance amount of the anode gas due to permeation is not added in the rest of power generation. That is, the disappearance amount due to permeation in the rest of power generation is considered to be zero, and the disappearance amount is calculated. The reason why the disappearance amount due to permeation in the rest of power generation is considered to be zero is as follows. In the rest of power generation, the anode gas is not injected from the INJ 26, and the hydrogen partial pressure in the anode flow path 4a decreases. In addition, in the rest of power generation, the flow rate of the cathode gas supplied to the FC 4 decreases, and the oxygen partial pressure in the cathode flow path 4c decreases. Also, water of hydration is generated in the power generation of the FC 4, but this water of hydration is not generated in the rest of power generation, and the humidity of the electrolyte membrane 42 decreases. According to the above reasons, the amount of hydrogen and oxygen that permeates through the electrolyte membrane 42 decreases in the rest of power generation, and the disappearance amount of the anode gas due to permeation in the rest of power generation is considered to be zero.

[0043] The disappearance amount of the anode gas is calculated with high precision as above, and therefore the consumption amount of the anode gas is also calculated with high precision. Along with this, the fuel consumption rate is also calculated with high precision, and the driver can grasp the fuel consumption rate calculated with high precision by checking the DP 7.

[0044] The larger the area of the electrolyte membrane 42, the more the number of electrolyte membranes 42, and the thinner the film thickness of the electrolyte membrane 42, the larger the value of the aforementioned amount of disappearance per unit time is set in advance. This is because it can be considered that the larger the area of the electrolyte membrane 42, the more the amount of hydrogen permeation and the amount of oxygen permeation caused by permeation. In addition, this is because it can be considered that the more the number of electrolyte membranes 42, that is, the more the number of blocks of the cell 4s of the FC 4, the more the aforementioned amounts of permeation. In addition, this is because it can be considered that the thinner the film thickness of the electrolyte membrane 42, the more easily hydrogen and oxygen permeate.

[0045] [Variant of the fuel consumption rate calculation control]

[0046] Next, a variant of the fuel consumption rate calculation control will be described. The ECU 3 executes the following variant of the fuel consumption rate calculation control by functionally implementing the first to fourth calculation sections and the acquisition section. Figure 5 is a flowchart showing the variant of the fuel consumption rate calculation control executed by the ECU 3. After the execution of Step S1, the ECU 3 acquires the pressure of the anode gas on the basis of the detection value of the pressure sensor S (Step S2a). Step S2a is one example of the processing executed by the acquisition section.

[0047] Next, the ECU 3 calculates the amount of disappearance on the basis of the pressure of the anode gas (Step S2b). Specifically, the ECU 3 refers to the map of Figure 6 , calculates the amount of disappearance per unit time on the basis of the pressure of the anode gas, and calculates the amount of disappearance on the basis of the calculated amount of disappearance per unit time. Figure 6 is an example of a map that defines the relationship between the pressure of the anode gas and the amount of disappearance per unit time. In the map of Figure 6 , the amount of disappearance per unit time is defined so as to increase as the pressure of the anode gas is higher. This is because the higher the pressure of the anode gas, the more the amount of hydrogen permeation of the electrolyte membrane 42 caused by permeation. Thus, the amount of disappearance per unit time is determined in accordance with the change in the pressure of the anode gas. Step S2b is one example of the processing executed by the second calculation section. After that, Steps S3 to S5 are executed. Thus, the amount of disappearance can be calculated with high accuracy, and as a result, the fuel consumption rate can also be calculated with high accuracy. Furthermore, in the map of Figure 6 , the amount of disappearance per unit time changes linearly in accordance with the pressure of the anode gas, but it is not limited thereto, and for example, the amount of disappearance per unit time can change in a curved manner or in a stepwise manner.

[0048] The ECU 3 can also acquire the humidity of the electrolyte membrane 42 instead of the pressure of the anode gas, and the higher the humidity, the larger the value set to the amount of disappearance per unit time to calculate the amount of disappearance. This is because the higher the humidity of the electrolyte membrane 42, the more the permeation of hydrogen and oxygen of the electrolyte membrane 42 caused by permeation. The humidity of the electrolyte membrane 42 can be acquired, for example, based on a detection value of a humidity sensor provided in the supply pipe 21 of the anode gas supply system 20. In this case, the amount of disappearance per unit time can vary linearly, the amount of disappearance per unit time can vary curvilinearly, or the amount of disappearance per unit time can vary in stages.

[0049] The ECU 3 can also acquire the temperature of the electrolyte membrane 42 instead of the pressure of the anode gas, and the higher the temperature, the larger the value set to the amount of disappearance per unit time to calculate the amount of disappearance. This is because the higher the temperature of the electrolyte membrane 42, the more the permeation of hydrogen and oxygen of the electrolyte membrane 42 caused by permeation. For the temperature of the electrolyte membrane 42, for example, the outlet temperature of the cooling water can be acquired based on a detection value of a temperature sensor that detects the outlet temperature of the cooling water from the FC 4, and the outlet temperature of the cooling water can be acquired as the temperature of the electrolyte membrane 42. In this case, the amount of disappearance per unit time can vary linearly, the amount of disappearance per unit time can vary curvilinearly, or the amount of disappearance per unit time can vary in stages.

[0050] The ECU 3 can also acquire the pressure of the anode gas, the humidity of the electrolyte membrane 42, and the temperature of the electrolyte membrane 42, and the higher the pressure of the anode gas, the higher the humidity of the electrolyte membrane 42, and the higher the temperature of the electrolyte membrane 42, the larger the value set to the amount of disappearance per unit time. The ECU 3 can also acquire two of the pressure of the anode gas, the humidity of the electrolyte membrane 42, and the temperature of the electrolyte membrane 42, and the higher the acquired value, the larger the value set to the amount of disappearance per unit time.

[0051] The above describes the preferred embodiments of the present application in detail, but the present application is not limited to this particular embodiment, and various modifications and changes can be made within the scope of the gist of the present application described in the technical solution.

Claims

1. A fuel cell vehicle, characterized in that, The fuel cell vehicle has the following features: Fuel cells repeatedly generate electricity and then stop generating electricity while the vehicle is in motion; The supply system supplies anode gas and cathode gas to the fuel cell in such a manner that, during the pause in power generation of the fuel cell, the flow rates of the supplied anode gas and cathode gas are reduced compared to during power generation. A fuel consumption rate calculation device calculates the fuel consumption rate of a fuel cell vehicle based on the consumption of the anode gas in the fuel cell; and The reporting department reports the aforementioned fuel consumption rate to the driver. The fuel consumption rate calculation device has the following features: The first calculation unit calculates the amount of anode gas used in power generation in the fuel cell based on the value obtained by accumulating the power generation current in the fuel cell over time. The second calculation unit calculates the amount of anode gas lost due to the permeation of the anode gas and cathode gas through the electrolyte membrane of the fuel cell; The third calculation unit calculates the consumption of the anode gas in the fuel cell based on the sum of the usage and the loss. as well as The fourth calculation unit calculates the fuel consumption rate of the fuel cell vehicle based on the aforementioned consumption. The second calculation unit calculates the amount of disappearance based on the value obtained by accumulating the amount of anode gas disappearing per unit time caused by the permeation during the power generation time after excluding the time during the power generation pause of the fuel cell.

2. The fuel cell vehicle according to claim 1, characterized in that, It includes an acquisition unit that acquires at least one value among the pressure of the anode gas, the humidity of the electrolyte membrane, and the temperature of the electrolyte membrane. The higher the at least one value, the larger the value the second calculation unit sets the amount of time lost per unit of time to.

3. The fuel cell vehicle according to claim 1 or 2, characterized in that, The larger the area of ​​the electrolyte membrane, the more electrolyte membranes there are, and the thinner the electrolyte membrane is, the larger the value of the amount of time lost per unit time will be preset.

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