JP4161941B2 - Display device for fuel cell vehicle - Google Patents

Description

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

  In recent years, development of an electric vehicle using a fuel cell is desired from the viewpoint of ecology. In such a vehicle, the driving system is different from that of a fuel engine driven vehicle. Therefore, when a user familiar with such an old vehicle operates an electric vehicle using a fuel cell, the state of the power source (fuel gas, fuel cell stack, battery, motor, etc.) is in anxiety. And the driver is obligated to know the condition. In addition, the state of these power sources is also an object of interest apart from anxiety. Accordingly, 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 thereof is as follows. Means for detecting regenerative power of a motor driven by power supplied from at least one of a fuel cell stack and an auxiliary output source, a hydrogen flow meter for detecting the flow rate of hydrogen flowing through the fuel cell stack, and detection of the regenerative power A display device for a fuel cell vehicle, comprising: means for displaying the regenerative power of the motor based on the result; and a hydrogen flow rate display unit for displaying the hydrogen flow rate based on the detection result of the hydrogen flow rate .

  According to the display device of the first aspect configured as described above, the regenerative state of the motor is always visually monitored by the user, and the user can grasp the electric power obtained by the regeneration, thereby contributing to ecology. You can feel that

The configuration of the second aspect of the present invention is as follows. Means for detecting the output power of the fuel cell stack; means for detecting the power consumption of the motor from the output power of the fuel cell stack and the regenerative power of the motor; and the power consumption of the motor. The apparatus according to claim 1, further comprising: means for displaying electric power in synchronization with the regenerative electric power of the motor , wherein the hydrogen flowmeter further displays the flow rate of the hydrogen in synchronism with the regenerative electric power of the motor. The display apparatus for fuel cell vehicles as described.

  According to the display device of the second aspect configured as described above, the power consumption state of the motor can always be visually monitored, which gives the user a sense of security. At the same time, there is an amenity effect that satisfies the user's interest by displaying the flow of energy (the power consumption state of the motor) in real time.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the 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 is generally composed of 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 fuel cells. This unit unit has a structure in which a fuel cell main body having a structure in which a solid polymer electrolyte is sandwiched between an air electrode and a fuel electrode, is further sandwiched between carbon black separators. The shape of the unit unit is not particularly limited, but 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 through the hydrogen supply path 20 is sent to the hydrogen gas flow path of each unit unit of the fuel stack 2. A hydrogen pressure regulating valve 21 is provided in the hydrogen supply path 20 to regulate the hydrogen gas released from the hydrogen storage alloy 11. Reference numeral 23 denotes a hydrogen supply electromagnetic valve 23 that controls opening and closing of the hydrogen supply path 20. Reference numeral 12 in the figure denotes a connector used when hydrogen is charged into the hydrogen storage alloy 11 from an external hydrogen supply source. A switch 13 is attached to the connector 12. When the connector 12 is connected to an external hydrogen source, the switch 13 is activated to send a signal to the control device 151 (see FIG. 2). The control device 151 resets the trip meter 160 (see FIG. 8) based on this signal. Thereby, the travel distance with respect to one hydrogen filling amount can be notified. The hydrogen gas pressure immediately before being supplied to the fuel cell stack 2 is monitored by a hydrogen source pressure sensor 25. The hydrogen gas flow rate is monitored by a hydrogen gas flow meter 27. These pressure gauges 25 and flow meters 27 are of known construction.

  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 attached. The remaining amount of hydrogen stored in the hydrogen storage alloy 11 is detected from a comparison between the internal pressure of the cylinder when the maximum amount of hydrogen is stored in the hydrogen storage alloy 11 and the current internal pressure.

  In the fuel supply system 10, the hydrogen gas discharged from the fuel cell stack 2 is released to the atmosphere via the hydrogen exhaust path 30. The hydrogen exhaust passage 30 is provided with a check valve 31 and an electromagnetic valve 33. The check valve 31 prevents air from entering the fuel electrode of the fuel cell stack 2 through the hydrogen exhaust path 30. The electromagnetic valve 33 is driven intermittently to actively discharge the remaining water (and the detoxified gas). The hydrogen exhaust path 30, the check valve 31, and the electromagnetic valve 33 are collectively referred to as a fuel gas discharge system. Although not shown in the drawing, a catalyst combustor as a combustion means is disposed in the pipe 30, and hydrogen (and detoxified gas) is produced by catalytic combustion of hydrogen discharged from the discharge port and air introduced from the outside. In the state, it discharges via 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 the water condenser 51. The air supply path 41 is provided with a fan 43 and sends air from the atmosphere to the air manifold 45. Air flows from the manifold 45 into the air flow path of the fuel cell stack 2 and supplies oxygen to the air electrode. The air discharged from the fuel cell stack 2 is condensed and recovered by a water condenser 51 (water recovery device) and released to the atmosphere. A flow rate of air supplied to the air manifold 45 is detected by an air flow rate sensor 46. A general-purpose flow meter can be used for the sensor 46. The temperature of the air discharged from the fuel cell stack 2 is monitored by an exhaust temperature sensor 47.

  In this embodiment, a nozzle 55 is provided on the side wall of the air manifold 45, and water is supplied in a liquid state during intake. Most of this water reaches the water condenser 51 while maintaining a liquid state, and is sent to the tank 53 as it is to be collected. A part of the supplied water evaporates and is condensed in the water condenser 51 and collected. In addition, it is thought that some water vapor | steam contained in exhaust air originates in the reaction water accompanying the electric power generation reaction of the fuel cell stack 2. FIG. The water condenser 51 includes a general-purpose heat exchanger (not shown), which is cooled by a fan wind to condense and collect water vapor in the discharged air.

  The water supply system 50 is a closed system in which 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 always monitored by a water level sensor 56. A float type sensor was used as the water level sensor. A heater 57 and an antifreezing 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 the 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 ejected from here to the surface of the air electrode. This water is supplied to the air electrode of the fuel cell stack 2 where the latent heat is preferentially taken away from the air, so that evaporation of moisture from the electrolyte membrane on the air electrode side is prevented. Therefore, the electrolyte membrane always maintains a uniform wet state without being dried on the air electrode side. Further, the water supplied to the surface of the air electrode takes 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. Note that the output of the pump 61 is controlled in accordance with the temperature of the exhaust air detected by the exhaust temperature sensor 47, and the temperature of the fuel cell stack 2 is maintained at a desired temperature.

  The load system 70 takes out the output of the fuel cell stack 2 to drive the motor 77. The load system 70 is provided with a relay 71 for switching 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 always monitored by the voltage sensor 76. Based on this monitoring result, opening and closing of the hydrogen exhaust solenoid valve 33 is controlled by a control circuit (not shown).

  A power distribution device 80 is disposed at the intersection of the power paths of the fuel cell stack 2, the battery 75, and the motor 77. The power distribution device 80 controls the flow of power based on the output required of the motor 77, the current output of the fuel cell stack 2, the charging status 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. Further, 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 includes a first wattmeter 81 that detects power from the fuel cell stack, a second wattmeter 82 that detects power from the battery 75, and a third power that detects power to the motor 77. Detected by wattmeter 83. The second and third wattmeters 82 and 83 also measure negative power.

  Next, the display device of this embodiment will be described. FIG. 2 is a block diagram showing elements constituting the control system 150 that controls each display unit of the display device 200 shown in FIG. Various sensors shown in FIG. 1 are denoted by the same reference numerals. 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 unit 200 for an electric vehicle using a fuel cell. The driver seat display unit 200 includes a speed display unit 201, a power output display unit 203, a hydrogen remaining amount display unit 205, a warning lamp group 207, and an energy flow display unit 210. Of course, a display unit required for a general vehicle such as a blinker display unit is provided, but these are omitted.

  A 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 power output 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 remaining hydrogen 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 current internal pressure of the hydrogen storage alloy tank detected by the pressure gauge (hydrogen remaining amount gauge) 29 with the internal pressure corresponding to the stored maximum stored amount, and the predetermined stored in the memory 155. The remaining amount of hydrogen is calculated according to the rules.

  When an abnormality occurs in the fuel cell system 1, the warning lamp group 207 informs the driver of the source of the abnormality. The gas leak clamp 2071 is lit when the pressure of the hydrogen supply path 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 voltage drop lamp 2072 is turned on or blinked 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 blinked when the temperature of the exhaust air from 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, if the exhaust temperature becomes high, there is a possibility that an abnormal reaction has occurred in the stack 2.

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

  The hydrogen shortage lamp 2075 is turned on or blinked when the remaining amount of hydrogen in the hydrogen storage alloy 11 detected by the hydrogen remaining amount meter 29 falls below a predetermined value (for example, 10% of the maximum storage amount). The air shortage lamp 2076 is turned on or blinked 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, for example.

  The water shortage lamp 2077 is lit 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). If the water is insufficient, the cooling and moisture retention functions of the fuel cell stack 2 may be hindered. In particular, if water is insufficient at the time of start-up, the air electrode of the fuel cell may not be sufficiently wetted before hydrogen gas is supplied to the fuel cell stack 2, and an abnormal reaction may occur there. The excess water lamp 2078 is lit or blinked when the water level of the water tank 53 detected by the water level sensor 56 exceeds the predetermined range. If water is excessive in the water supply system 50, there is a risk of overflow from now on, which is not preferable. Since reaction water is generated by the power generation reaction, when the reaction water is condensed with high efficiency by the water condenser 51 and taken into the water supply system 50, the amount of water in the water supply system 50 increases.

  The energy flow display unit 210 includes a hydrogen flow rate display unit 2101, an air flow rate 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, hydrogen gas in an amount of 100 L / min 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 example shown in the figure, air having an amount of 1000 L / min 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 20 kW of power is supplied from the fuel cell stack 2. Further, the ratio of the current output to the maximum output of the fuel cell stack 2 is displayed as a percentage in the sub window of the fuel cell output display portion 2103. The battery output display unit 2104 displays the power detected by the second wattmeter 82. In the illustrated example, -5 kW of power is output. This means that the battery 75 is charged with 5 kW of the output of the fuel cell stack 2. Further, the ratio of the current output to the maximum output of the battery 75 is displayed as a percentage in the sub window of the battery output display unit 2104.

  Accordingly, the power supplied to the motor 77 is 15 kW, and this value of power is detected by the third power meter 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 can be changed to “motor regenerative power” and the regenerative power can be displayed as a positive value. The display of each of the display units 2101 to 2105 of the energy flow display unit 210 is performed in synchronization. Therefore, the flow of energy in the electric vehicle equipped with the fuel cell system can be grasped visually.

  FIG. 4 shows a driver seat display unit 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 dirt display unit 320. Of course, a display unit required for a general vehicle such as a blinker display unit is provided, but these are omitted.

  A 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 that displays the output of the fuel cell stack 2 and a portion 3032 that displays the output of the battery 75. The output of the fuel cell stack 2 (detected by the first wattmeter 81) and the output of the battery 75 (detected by the second wattmeter) in the electric power supplied to the motor 77 detected by the third wattmeter 83 ) Is calculated by the control device 151 and displayed on the fuel cell output display unit 3031 and the battery output display unit 3032 as percentage values, respectively. When the battery 75 is charged, the battery output display unit 3032 displays a value of 0%.

  The energy flow display unit 310 includes a hydrogen tank display unit 3101 that displays a tank of the hydrogen storage alloy 11, a fuel cell display unit 3103, a battery display unit 3104, and a motor rotation display unit 3106. Each part is connected with energy paths 3110 and 3111, and the paths 3110 and 3111 blink to indicate the direction of energy flow. That is, when hydrogen is supplied from the hydrogen storage alloy 11 to the fuel cell stack 2, the lit segment moves from the hydrogen tank display unit 3101 to the fuel cell display unit 3103 in 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 lit segment moves from the fuel cell display unit 3103 and the battery display unit 3104 to the motor rotation display unit 3106 in the energy path 3111. On the other hand, during regeneration, the motor rotation display unit 3106 displays a reverse rotation, and the lit segment moves from the motor rotation display unit 3106 to the battery display unit 3104 in the energy path 3111. In the above, 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 wattmeters 81 to 83.

  The hydrogen tank display unit 3101 includes a remaining amount display unit 31011, a continuous travelable distance display unit 31012, and a warning display unit 31013. The display of the remaining amount display unit 31011 is executed when the control device 151 processes the detection result of the hydrogen remaining amount meter 29. The display of the continuous travelable distance display unit 31013 refers to the current travel pattern monitored by the control device 151 (the amount of hydrogen gas consumed for traveling a unit distance), and controls the remaining amount of hydrogen. 151 is executed by processing (the distance that can be traveled is displayed as a numerical value). The warning display unit 31013 displays a shortage of the remaining amount of hydrogen when the remaining amount of hydrogen falls below a predetermined threshold. This warning display unit 31013 is also displayed by the control device 151 processing the detection result of the hydrogen remaining amount meter 29.

  The fuel cell display unit 3103 includes a warning display unit 31031. The warning display unit 31031 displays the abnormal heating when the temperature of the fuel cell stack 2 exceeds a predetermined temperature. This warning display unit 31013 is displayed when the control device 151 processes the detection result of the exhaust temperature sensor 47.

  The battery display unit 3104 includes a charge state display unit 31041. The charging state display unit 31041 displays the charging state of the battery 75. The display of the charge state display unit 31041 is executed by processing the detection result of a general battery level meter 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 driving state and the regenerative state. The display on the motor display unit 3106 is executed by processing the detection result of the third wattmeter 83 by the control device 151.

  The air contamination display unit 320 displays the state of air contamination in the vehicle compartment. The display of the air dirt display unit 320 is executed by the control device 151 processing the detection result of the air dirt sensor 170 disposed in the room.

  FIG. 5 shows a driver seat display unit 400 according to another embodiment. The driver 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 navigation monitor. 412. Of course, a display unit required for a general vehicle such as a blinker 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 display unit 406 are the same as those in the above-described embodiment. The temperature display unit 405 of the hydrogen storage alloy 11 displays the temperature of the hydrogen storage alloy 11, and the display is executed by the control device 151 processing the detection result of the thermometer 28. The inter-vehicle distance meter 408 displays the inter-vehicle distance with respect to the preceding and following vehicles detected by the inter-vehicle distance detection means provided in the vehicle (not shown). Further, information on the relative distance and relative speed is calculated according to the inter-vehicle distance and the vehicle speed detected by the inter-vehicle distance detecting means, and based on this information, notification means (not shown) notifies whether the situation is dangerous to the driver.

  The warning display unit 409 displays the state of charge of the battery 75 in three levels (blue, yellow, red) as viewed in signal display. This display is executed by processing the detection result of a 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 levels (red, yellow, and blue) as viewed in 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 hydrogen amount display unit 406 indicates the remaining amount in the hydrogen storage alloy 11 detected by the hydrogen remaining amount meter 29 shows a predetermined value (for example, 10% of the maximum storage amount), the navigation device (not shown) 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 unit 503 in another form. The fuel cell output display unit 503 has a wide range of output (0 to 20 kW) in the most frequently used range. The display on the display unit 503 is executed by processing the detection result of the first wattmeter 81 by the control device 151.

  FIG. 7 shows an example of an efficiency display unit 600 that displays the efficiency of the fuel cell stack 2. This efficiency is generated 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 fuel cell stack. It is calculated and displayed from the electric power (first wattmeter 81). The hydrogen gas flow meter 27, the voltage sensor 76, and the first wattmeter 81 constitute a means for detecting the energy conversion efficiency, and the efficiency display unit 600 constitutes a means for displaying the detected energy conversion efficiency. The

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

(100) The display device according to claim 1, wherein the display means 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 a 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 a dirty state of indoor air; and means for displaying the dirty state of air based on a detection result of the detecting means. . For users who feel that they are driving a fuel cell vehicle and producing clean exhaust gases, the dirty state of the air inside the vehicle is also of interest. Therefore, displaying the dirty state of the air inside the fuel cell vehicle in this way gives the user a sense of security. There is also an amenity effect.
(1000) A display device for a fuel cell vehicle, comprising: at least two elements selected from claims 1 to 11, and (101), (201) to (203), and (801).
(901) When the results detected by the detection means according to any one of claims 1 to 11 and (101), (201) to (203) and (801) are out of a predetermined range. A display for a fuel cell vehicle according to any one of claims 1 to 11, and (101), (201) to (203), (801) and (1000), characterized in that 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 the control system. FIG. 3 is a front view showing a driver seat display unit of one embodiment. FIG. 4 is a front view showing a driver seat display unit of another embodiment. FIG. 5 is a front view showing a driver seat display unit 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 an efficiency display portion of the fuel cell. FIG. 8 is a front view showing the odometer.

Explanation of symbols

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

Claims (2)

Means for detecting regenerative power of a motor driven by power supplied from at least one of a fuel cell stack and an auxiliary output source;
A hydrogen flow meter for detecting the flow rate of hydrogen flowing through the fuel cell stack;
Means for displaying the regenerative power of the motor based on the detection result of the regenerative power ;
Based on the detection result of the hydrogen flow rate, a hydrogen flow rate display unit that displays the hydrogen flow rate,
A display device for a fuel cell vehicle comprising: Means for detecting output power of the fuel cell stack;
Means for detecting power consumption of the motor from output power of the fuel cell stack and regenerative power of the motor;
Means for displaying the power consumption of the motor in synchronism with the output power of the fuel cell and the regenerative power of the motor, and the hydrogen flow meter displays the flow rate of the hydrogen in synchronism with the regenerative power of the motor. To
The display device for a fuel cell vehicle according to claim 1, further comprising:

Images