JP2004273466A - Display device for fuel cell vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device suited for displaying the state of the power source of a fuel cell-driven vehicle. <P>SOLUTION: The output of each element constituting a fuel cell stack is monitored and the result is displayed on a driver's seat display part. The display part displays the result of comparison between the maximum output and the current output of the fuel-cell stack, the charged/discharged state of a charging and discharging auxiliary output source attached to the fuel-cell stack, and the state of synchronization between the current output of the fuel-cell stack and the charged/discharged state of the auxiliary output source. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a display device for an electric vehicle using a fuel cell.

  Recently, development of electric vehicles using fuel cells has been desired from the viewpoint of ecology. In such a vehicle, a driving system is different from a vehicle driven by a fuel engine. Therefore, when a user accustomed to such a conventional vehicle drives an electric vehicle using a fuel cell, it is unclear what the power source (fuel gas, fuel cell stack, battery, motor, etc.) is in. And the driver is obliged to grasp the condition. In addition, the state of these power sources is of interest, apart from anxiety. Therefore, an object of the present invention is to provide a display device suitable for displaying the state of a power source in an electric vehicle using a fuel cell.

The present invention has been made to solve the above problems, and the configuration of the first aspect is as follows. Means for holding the maximum output of the fuel cell stack; means for detecting the current output of the fuel cell stack; means for comparing the maximum output of the fuel cell stack with the current output; and Means for displaying the result of comparison with the output,
A display device for a fuel cell vehicle, comprising:

  According to the display device of the first aspect configured as described above, the ratio of the current output to the maximum output of the fuel cell stack is displayed, for example, as a percentage. Therefore, the state of the fuel cell stack is always visually monitored by the user. This eliminates anxiety about the new method. In addition, by displaying the operation of the new configuration (the ratio of the current output to the maximum output of the fuel cell stack) in real time, there is an effect of amenities that satisfy the interest of the user.

  The configuration of the second aspect of the present invention is as follows. A fuel, comprising: an auxiliary output source attached to a fuel cell stack for charging / discharging; a unit for detecting a charging / discharging state of the auxiliary output source; and a unit for displaying the charging / discharging state based on the detection result. Display device for battery vehicles.

  According to the display device of the second aspect configured as described above, the charge / discharge state of the auxiliary output source as a backup power source for the fuel cell stack can be constantly monitored visually, giving the user a sense of security. At the same time, by displaying the operation of the new configuration (the charge / discharge state of the charge / discharge means) in real time, there is an effect of amenities that satisfy the interest of the user.

  The third aspect of the present invention is configured as follows. Means for detecting a current output of the fuel cell stack, means for detecting a charge / discharge state of an auxiliary output source attached to the fuel cell stack, and a current output of the fuel cell stack and charge / discharge of the auxiliary output source Means for displaying the state in synchronization with the state of the fuel cell vehicle.

  According to the display device of the third aspect configured as described above, the current output of the fuel cell stack and the charge / discharge state of the charge / discharge unit are displayed in synchronization with each other. The user can visually grasp the state of the power supply source to give the user a sense of security. At the same time, by displaying the operation of the new configuration (power supply to the motor in cooperation with the fuel cell stack and the auxiliary output source) in real time, there is an effect of amenities that satisfy the interest of the user.

  Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a fuel cell system 1 according to an embodiment of the present invention. As shown in FIG. 1, the fuel cell system 1 generally includes a fuel cell stack 2, a fuel supply system 10 including a hydrogen storage alloy 11, an air supply system 40, a water supply system 50, and a load system 70.

  The fuel cell stack 2 is formed by connecting a plurality of unit units of a fuel cell. This unit unit has a configuration in which a fuel cell body having a configuration in which a solid polymer electrolyte is sandwiched between an air electrode and a fuel electrode is further sandwiched by a carbon black separator. Although the shape of the unit unit is not particularly limited, an air flow path for circulating air is formed in the vertical direction between the separator and the air electrode. A hydrogen gas flow path for flowing hydrogen gas is formed between the separator and the fuel electrode.

  In the fuel supply system 10, the hydrogen released from the hydrogen storage alloy 11 via the hydrogen supply path 20 is sent to the hydrogen gas flow path of each unit of the fuel stack 2. A hydrogen pressure regulating valve 21 is provided in the hydrogen supply path 20 to regulate the pressure of the hydrogen gas released from the hydrogen storage alloy 11. Reference numeral 23 denotes a hydrogen supply solenoid valve 23 which controls opening and closing of the hydrogen supply path 20. Reference numeral 12 in the figure denotes a connector used when filling the hydrogen storage alloy 11 with hydrogen from an external hydrogen supply source. The connector 12 has a switch 13 attached thereto. When the connector 12 is connected to an external hydrogen source, the switch 13 is operated to send a signal to the control device 151 (see FIG. 2). Control device 151 resets trip meter 160 (see FIG. 8) based on this signal. Thereby, it is possible to notify the traveling distance for one hydrogen filling amount. The hydrogen gas pressure immediately before being supplied to the fuel cell stack 2 is monitored by a hydrogen source pressure sensor 25. The flow rate of the hydrogen gas is monitored by a hydrogen gas flow meter 27. A well-known configuration is used for the pressure gauge 25 and the flow meter 27.

  The hydrogen storage alloy 11 is provided with means for detecting the remaining amount of hydrogen stored therein. The means for detecting the remaining amount of hydrogen is not particularly limited, but in this embodiment, a pressure gauge 29 for measuring the internal pressure of the hydrogen storage alloy cylinder is provided. The remaining amount of hydrogen stored in the hydrogen storage alloy 11 is detected by comparing the internal pressure of the cylinder when the maximum amount of hydrogen is stored in the hydrogen storage alloy 11 with the current internal pressure.

  In the fuel supply system 10, hydrogen gas discharged from the fuel cell stack 2 is discharged to the atmosphere via a hydrogen exhaust path 30. A check valve 31 and an electromagnetic valve 33 are provided in the hydrogen exhaust path 30. The check valve 31 prevents air from entering the fuel electrode of the fuel cell stack 2 via the hydrogen exhaust passage 30. The solenoid valve 33 is driven intermittently and positively discharges remaining water (and detoxified gas). The hydrogen exhaust path 30, the check valve 31, and the solenoid valve 33 are collectively called a fuel gas discharge system. Although not shown, a catalytic combustor as a combustion means is disposed in the pipe 30 to catalytically combust the hydrogen discharged from the discharge port and air introduced from the outside to produce water (and detoxified gas). In this state, it is discharged through the solenoid valve 33.

  The air supply system 40 supplies air from the atmosphere to the air flow path of the fuel cell stack 2, and exhausts the air discharged from the fuel cell stack 2 through a water condenser 51. The air supply path 41 is provided with a fan 43 for sending air from the atmosphere to the air manifold 45. The air flows from the manifold 45 into the air flow path of the fuel cell stack 2 to supply oxygen to the air electrode. The air discharged from the fuel cell stack 2 is condensed and recovered in a water condenser 51 (water recovery device) and released to the atmosphere. The flow rate of air supplied to the air manifold 45 is detected by an air flow sensor 46. A general-purpose flow meter can be used as the sensor 46. The temperature of the air discharged from the fuel cell stack 2 is monitored by an exhaust gas temperature sensor 47.

  In this embodiment, a nozzle 55 is provided on the side wall of the air manifold 45, and thereby water is supplied in a liquid state during intake. Most of this water reaches the water condenser 51 while maintaining the liquid state, and is sent to the tank 53 as it is to be collected. Part of the supplied water evaporates and is condensed and recovered in the water condenser 51. It is considered that some of the water vapor contained in the discharged air is caused by reaction water accompanying the power generation reaction of the fuel cell stack 2. The water condenser 51 is provided with a general-purpose heat exchanger (not shown), which is cooled by a fan to condense and recover water vapor in the discharged air.

  The water supply system 50 is a closed system in which the water in the tank 53 is supplied from the nozzle 55 to the air manifold 45, and this water is collected by the water condenser 51 and returned to the tank 53. The water level in the tank 53 is constantly monitored by a water level sensor 56. A float type water level sensor was used. A heater 57 and a freezing prevention electromagnetic valve 58 are attached to the tank 53 so that the water in the tank 53 does not freeze in winter. An electromagnetic valve 60 is attached to a pipe connecting the water condenser 51 and the tank 53 to prevent water in the tank 53 from evaporating.

  The water in the tank 53 is pumped by a pump 61 to a nozzle 55 disposed in the air manifold, and is continuously or intermittently jetted from the nozzle 55 to the surface of the air electrode. This water is supplied to the air electrode of the fuel cell stack 2, where latent water is preferentially deprived of air, so that evaporation of water from the electrolyte membrane on the air electrode side is prevented. Therefore, the electrolyte membrane always keeps a uniform wet state without drying on the air electrode side. Further, the water supplied to the surface of the air electrode also removes heat from the air electrode itself and cools it, so that the temperature of the fuel cell stack 2 can be controlled. That is, the fuel cell stack 2 can be sufficiently cooled without adding a cooling water supply system to the fuel cell stack 2. The output of the pump 61 is controlled in accordance with the temperature of the exhaust air detected by the exhaust temperature sensor 47 to maintain the temperature of the fuel cell stack 2 at a desired temperature.

  The load system 70 extracts the output of the fuel cell stack 2 to the outside and drives the motor 77. The load system 70 is provided with a relay 71 for a switch and a battery 75 as an auxiliary output source, and a rectifying diode 73 is interposed between the battery 75 and the relay 71. The voltage of the fuel cell stack 2 itself is constantly monitored by the voltage sensor 76. Based on this monitoring result, the opening and closing of the hydrogen exhaust solenoid valve 33 is controlled by a control circuit (not shown).

  An electric power distribution device 80 is provided at the intersection of the electric power paths of the fuel cell stack 2, the battery 75, and the motor 77. The power distribution device 80 controls the flow of electric power based on the output required of the motor 77, the current output of the fuel cell stack 2, the state of charge of the battery 75, and the like. For example, when a large output is required for the motor 77, power is supplied from both the fuel cell stack 2 and the battery 75 to the motor. When the motor 77 is regenerating, the electric power generated by the motor 77 is sent to the battery 75 and charged there. Such a flow of power is caused by a first power meter 81 that detects power from the fuel cell stack, a second power meter 82 that detects power from the battery 75, and a third power meter 82 that detects power to the motor 77. Detected by wattmeter 83. The second and third power meters 82, 83 also measure negative power.

  Next, the display device of this embodiment will be described. FIG. 2 is a block diagram showing components constituting a control system 150 that controls each display unit of the display device 200 shown in FIG. The same reference numerals are given to the various sensors shown in FIG. The control device 151 includes a CPU 153 and a memory 155. The CPU 153 is connected to each element via an interface (not shown), and controls each element based on a control program stored in the memory 155 in advance.

  FIG. 3 shows an example of a driver's seat display section 200 of an electric vehicle using a fuel cell. The driver's seat display unit 200 includes a speed display unit 201, a power output display unit 203, a remaining hydrogen amount display unit 205, a warning lamp group 207, and an energy flow display unit 210. Needless to say, a display unit required for a general vehicle such as a turn signal display unit is provided, but these are omitted.

  The speed display unit 201 displays the current vehicle speed detected by a general speed sensor (not shown). The power output display unit 203 displays the total output of a power supply composed of the fuel cell stack 2 and the battery 75. Specifically, the CPU 153 adds the power measured by the FC wattmeter 81 and the battery wattmeter 82 (the power going to the motor 77 is positive), and displays the result.

  The hydrogen remaining amount display unit 205 displays the remaining amount of hydrogen stored in the hydrogen storage alloy 11. The memory 155 stores the internal pressure of the hydrogen storage alloy tank when the maximum amount of hydrogen is stored in the hydrogen storage alloy 11. Then, the CPU compares the present internal pressure of the hydrogen storage alloy tank detected by the pressure gauge (hydrogen fuel gauge) 29 with the internal pressure corresponding to the stored maximum storage amount, and stores the predetermined internal pressure stored in the memory 155. Calculate the remaining hydrogen amount according to the rules described above.

  When an abnormality occurs in the fuel cell system 1, the warning lamp group 207 notifies the driver of the occurrence of the abnormality. The gasy clamp 2071 is turned on when the pressure of the hydrogen supply passage 20 detected by the hydrogen source pressure sensor 25 becomes smaller than a predetermined value even though a sufficient amount of hydrogen is stored in the hydrogen storage alloy 11. Or it flashes. This is because hydrogen gas may leak from the hydrogen supply system 10.

  The low voltage lamp 2072 is turned on or blinks when the output voltage of the fuel cell stack 2 detected by the voltage sensor 76 becomes lower than a predetermined value. The cause of the voltage drop is considered to be deterioration of the electrolyte membrane. The exhaust temperature lamp 2073 is turned on or blinks when the temperature of the exhaust air of the fuel cell stack 2 detected by the exhaust temperature sensor 47 becomes higher than a predetermined temperature. Since the temperature of the exhaust air reflects the reaction temperature of the fuel cell stack 2, an abnormal reaction may occur in the stack 2 when the exhaust temperature increases.

  The battery heating lamp 2074 is turned on or blinks while the heater 57 is turned on to warm up the water tank 53 in order to activate the fuel cell stack 2 when it is cold. Since the water in the water tank may freeze when cold, the fuel cell is not started while the heater 57 is at a sufficient temperature (in a state where water can be supplied to the fuel cell stack 2). .

  The hydrogen deficiency lamp 2075 is turned on or flashed when the remaining amount of hydrogen in the hydrogen storage alloy 11 detected by the hydrogen remaining meter 29 falls below a predetermined value (for example, 10% of the maximum storage amount). The air shortage lamp 2076 is turned on or blinks when the air flow rate detected by the air flow rate sensor 46 falls below a predetermined value. The decrease in the air flow rate is caused by, for example, clogging of an air filter (not shown) of the fan 43.

  The water shortage lamp 2077 is turned on or blinked when the water level of the water tank 53 detected by the water level sensor 56 falls below a predetermined range (50 to 80% of the maximum allowable amount). Insufficient water may impair the cooling and moisturizing functions of the fuel cell stack 2. In particular, if water is insufficient at the time of starting, the air electrode of the fuel cell may not be sufficiently wet before the hydrogen gas is supplied to the fuel cell stack 2, and an abnormal reaction may occur there. The water excess lamp 2078 is turned on or blinked when the water level of the water tank 53 detected by the water level sensor 56 exceeds the above-mentioned predetermined range. If the water in the water supply system 50 becomes excessive, the water may overflow from now on, which is not preferable. Since the reaction water is generated by the power generation reaction, if the reaction water is condensed by the water condenser 51 with high efficiency and taken into the water supply system 50, the amount of water in the water supply system 50 will increase.

  The energy flow display unit 210 includes a hydrogen flow display unit 2101, an air flow display unit 2102, a fuel cell output display unit 2103, a battery output display unit 2104, and a motor power consumption display unit 2105. The hydrogen flow rate display unit 2101 displays the hydrogen flow rate detected by the hydrogen flow meter 27. This hydrogen flow rate indicates the amount of hydrogen gas flowing through the hydrogen supply path 20 to be supplied to the fuel cell stack 2. In the illustrated example, 100 L / min of hydrogen gas is supplied to the fuel cell stack 2. The air flow rate display unit 2102 displays the air flow rate detected by the air flow rate sensor 46. This air flow rate indicates the amount of air sent from the fan 43 to be supplied to the air manifold 45 of the fuel cell stack 2. In the illustrated example, 1000 L / min of air is supplied to the air manifold 45.

  The fuel cell output display unit 2103 displays the power detected by the first wattmeter 81. In the illustrated example, it can be seen that power of 20 kW is supplied from the fuel cell stack 2. In the subwindow of the fuel cell output display unit 2103, the ratio of the current output to the maximum output of the fuel cell stack 2 is displayed as a percentage. Battery output display unit 2104 displays the power detected by second power meter 82. In the illustrated example, power of −5 kW is output. This means that 5 kW of the output of the fuel cell stack 2 is charged in the battery 75. In the sub-window of the battery output display unit 2104, the ratio of the current output to the maximum output of the battery 75 is displayed as a percentage.

  Therefore, the power supplied to the motor 77 is 15 kW, and the power of this value is detected by the third wattmeter 83 and displayed on the motor power consumption display unit 2105. When the motor 77 is regenerating, the value of the motor power consumption display unit 2105 is negative. Alternatively, the display of “motor power consumption” on the display unit may be changed to “motor regenerative power” and the regenerative power may be displayed as a positive value. The displays on the respective display units 2101 to 2105 of the energy flow display unit 210 are performed in synchronization. Therefore, the flow of energy in the electric vehicle including the fuel cell system can be visually recognized.

  FIG. 4 shows a driver's seat display section 300 of another embodiment. The driver's seat display unit 300 includes a speed display unit 301, a power output display unit 303, an energy flow display unit 310, and an air contamination display unit 320. Needless to say, a display unit required for a general vehicle such as a turn signal display unit is provided, but these are omitted.

  The speed display unit 301 displays the current vehicle speed detected by a general speed sensor (not shown). The power output display unit 303 includes a portion 3031 for displaying the output of the fuel cell stack 2 and a portion 3032 for displaying the output of the battery 75. The output of the fuel cell stack 2 occupying the power supplied to the motor 77 detected by the third power meter 83 (detected by the first power meter 81) and the output of the battery 75 (detected by the second power meter) Is calculated by the controller 151 and displayed as a percentage value on the fuel cell output display section 3031 and the battery output display section 3032, respectively. When the battery 75 is being charged, the battery output display section 3032 displays a value of 0%.

  The energy flow display section 310 includes a hydrogen tank display section 3101 for displaying the tank of the hydrogen storage alloy 11, a fuel cell display section 3103, a battery display section 3104, and a motor rotation display section 3106. The parts are connected by energy paths 3110 and 3111, and the paths 3110 and 3111 blink to indicate the direction of energy flow. That is, when hydrogen is being supplied from the hydrogen storage alloy 11 to the fuel cell stack 2, the segments lit from the hydrogen tank display portion 3101 to the fuel cell display portion 3103 move on the energy path 3110. When both the output of the fuel cell stack 2 and the output of the battery 75 are supplied to the motor 77, the segments lit from the fuel cell display 3103 and the battery display 3104 to the motor rotation display 3106 in the energy path 3111 move. On the other hand, during regeneration, the motor rotation display unit 3106 displays reverse rotation, and the segments lit from the motor rotation display unit 3106 to the battery display unit 3104 in the energy path 3111 move. In the above description, the display of the energy path 3110 is executed by the control device 151 processing the detection result of the hydrogen gas flow meter 27. The display of the energy path 3111 is executed by the control device 151 processing the detection results of the first to third power meters 81 to 83.

  The hydrogen tank display unit 3101 includes a remaining amount display unit 31011, a continuously operable distance display unit 31012, and a warning display unit 31013. The display of the remaining amount display unit 31011 is executed by the control device 151 processing the detection result of the remaining hydrogen meter 29. The display of the continuous travelable distance display unit 31013 refers to the current travel pattern (the amount of hydrogen gas consumed when traveling the unit distance) monitored by the control device 151, and determines the remaining amount of hydrogen by the control device. The processing is performed by 151 (the distance that can be traveled is indicated by a numerical value). The warning display unit 31013 displays an insufficient amount of hydrogen when the remaining amount of hydrogen falls below a predetermined threshold. The display of the warning display section 31013 is also executed by the control device 151 processing the detection result of the remaining hydrogen meter 29.

  The fuel cell display unit 3103 includes a warning display unit 31031. When the temperature of the fuel cell stack 2 exceeds a predetermined temperature, the warning display unit 31031 displays the abnormal heating. The display of the warning display section 31013 is executed by the control device 151 processing the detection result of the exhaust gas temperature sensor 47.

  The battery display unit 3104 includes a charge state display unit 31041. The charge state display section 31041 displays the charge state of the battery 75. The display of the charge state display section 31041 is executed by processing the detection result of the general-purpose battery fuel gauge attached to the battery 75 by the control device 151.

  The motor display unit 3106 displays the rotation of the motor 77, and the rotation display is reversed between the drive state and the regenerative state. The display of the motor display unit 3106 is executed by processing the detection result of the third power meter 83 by the control device 151.

  The air dirt display section 320 displays the state of air dirt in the vehicle cabin. The display of the air dirt display section 320 is executed by the control device 151 processing the detection result of the air dirt sensor 170 disposed indoors.

  FIG. 5 shows a driver's seat display section 400 of another embodiment. The driver's seat display unit 400 includes a speed display unit 401, a power output display unit 403, a hydrogen storage alloy temperature display unit 405, a hydrogen remaining amount display unit 406, an inter-vehicle distance meter 408, warning display units 409 and 411, and a monitor for navigation. 412. Needless to say, a display unit required for a general vehicle such as a turn signal display unit is provided, but these are omitted.

  The operations of the speed display unit 401, the power output display unit 403, and the remaining hydrogen amount display unit 406 are the same as those of the above-described embodiments. The temperature display section 405 of the hydrogen storage alloy 11 displays the temperature of the hydrogen storage alloy 11, and the display is performed by the control device 151 processing the detection result of the thermometer 28. The inter-vehicle distance meter 408 displays the inter-vehicle distance to the preceding and following vehicles detected by the inter-vehicle distance detecting means provided on the vehicle (not shown). Further, information on the relative distance and the relative speed is calculated in accordance with the following distance and the vehicle speed detected by the following distance detecting means, and based on this information, the driver is notified by a notifying means (not shown) whether the situation is dangerous.

  The warning display unit 409 displays the charge state of the battery 75 in three levels (blue, yellow, and red) as viewed on a signal display. This display is performed by processing the detection result of the general-purpose battery fuel gauge attached to the battery 75 by the control device 151. The warning display unit 410 displays the output state of the fuel cell stack 2 in three stages (red, yellow, and blue) as viewed on a signal display. This display is executed by processing the output result of the voltmeter 76 attached to the fuel cell stack 2 by the control device 151. When the remaining amount of hydrogen in the hydrogen storage alloy 11 detected by the remaining hydrogen meter 29 indicates a predetermined value (for example, 10% of the maximum storage amount), the navigation device (not shown) operates the vehicle. The location of the hydrogen filling station around the current position or within a predetermined range is displayed and guided through the navigation monitor 412.

  FIG. 6 shows a fuel cell output display section 503 of another embodiment. In the fuel cell output display section 503, the output (0 to 20 kW) in the most frequently used range is widely set. The display on the display unit 503 is executed by processing the detection result of the first power meter 81 by the control device 151.

  FIG. 7 shows an example of the efficiency display section 600 for displaying the efficiency of the fuel cell stack 2. This efficiency is caused by the flow rate of hydrogen gas supplied to the fuel cell stack 2 (detected by the hydrogen gas flow meter 27), the voltage of the fuel cell stack 2 itself (detected by the voltage sensor 76), and the generation of the fuel cell stack. The power is calculated from the power (first power meter 81) and displayed. The hydrogen gas flow meter 27, the voltage sensor 76, and the first power meter 81 constitute a unit for detecting the energy conversion efficiency, and the efficiency display unit 600 constitutes a unit for displaying the detected energy conversion efficiency. You.

  The present invention is not limited to the description of the embodiment and the example of the above invention. Various modifications are included in the present invention without departing from the scope of the claims and within the scope of those skilled in the art.

(100) The display device according to claim 1, wherein the display unit displays a ratio of the current output to the maximum output in%.
(101) A display device for a fuel cell vehicle, comprising: means for detecting the output of the fuel cell device; and means for displaying the detected output of the fuel cell device.

(201) A display device for a fuel cell vehicle, comprising: means for detecting the gas pressure of the fuel gas supplied to the fuel cell stack; and means for displaying the detected gas pressure of the fuel gas.
(202) A display device for a fuel cell vehicle, comprising: means for detecting a flow rate of air supplied to the fuel cell stack; and means for displaying the detected flow rate of the air.
(203) A display device for a fuel cell vehicle, comprising: means for detecting the temperature of the fuel cell stack; and means for displaying the detected temperature of the fuel cell stack.

(801) A display device for a fuel cell vehicle, comprising: means for detecting an air contamination state in a room; and means for displaying an air contamination state based on a detection result of the detection means. . For a user who is driving a fuel cell vehicle and emitting clean exhaust gas, the state of contamination of the air inside the vehicle is also of interest. Therefore, displaying the state of dirt in the air inside the fuel cell vehicle in this way gives the user a sense of security. There is also the effect of amenities.
(1000) A display device for a fuel cell vehicle, comprising: at least two elements selected from the group consisting of (1) to (11), (201) to (203), and (801).
(901) When a result detected by each detecting means according to any one of claims 1 to 11, and (101), (201) to (203) and (801) is out of a predetermined range. 12. A display device for a fuel cell vehicle according to any one of claims 1 to 11, and (101), (201) to (203), (801) and (1000), wherein a warning lamp is displayed. .

FIG. 1 is a conceptual diagram showing the configuration of a fuel cell system according to one embodiment of the present invention. FIG. 2 is a block diagram showing a control system. FIG. 3 is a front view showing the driver's seat display section of one embodiment. FIG. 4 is a front view showing a driver's seat display section of another embodiment. FIG. 5 is a front view showing a driver's seat display section of another embodiment. FIG. 6 is a front view showing another example of the fuel cell output display section. FIG. 7 is a front view showing the efficiency display section of the fuel cell. FIG. 8 is a front view showing the odometer.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Fuel cell system 2 Fuel cell stack 11 Hydrogen storage alloy 151 Control device 200, 300, 400 Driver's seat display section

Claims (3)

Means for maintaining the maximum output of the fuel cell stack;
Means for detecting a current output of the fuel cell stack;
Means for comparing the maximum output of the fuel cell stack with the current output,
Means for displaying a result of comparison between the maximum output and the current output;
A display device for a fuel cell vehicle, comprising: An auxiliary power source attached to the fuel cell stack for charging and discharging;
Means for detecting a charge / discharge state of the auxiliary output source;
Means for displaying the charge / discharge state based on the detection result;
A display device for a fuel cell vehicle comprising: Means for detecting the current output of the fuel cell stack;
Means for detecting a charge / discharge state of an auxiliary output source attached to the fuel cell stack;
Means for synchronously displaying the current output of the fuel cell stack and the charge / discharge state of the auxiliary output source,
A display device for a fuel cell vehicle comprising:

Images