JP2010232111A - Fuel cell vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell vehicle which can attain power-saving in relation to scavenging treatment of a fuel cell. <P>SOLUTION: The fuel cell vehicle includes a scavenging control device which controls the scavenging treatment; a power source for the scavenging control device; a switch installed in a circuit which connects the scavenging control device and the power source; a temperature sensor for detecting the ambient temperature; and a switch control circuit which determines whether the ambient temperature detected with the temperature sensor is equal to or lower than the starting temperature of the scavenging treatment or not, and turns on the switch when the ambient temperature is equal to or lower than the starting temperature of the scavenging treatment. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fuel cell vehicle in which a start temperature of a scavenging process for a fuel cell is set in advance, and the scavenging process is performed when the temperature is equal to or lower than the start temperature of the scavenging process after operation is stopped.

  There is known a fuel cell vehicle using a fuel cell as a power source. In a fuel cell vehicle, a scavenging process for blowing off the water and moisture is performed in order to avoid problems caused by freezing of water generated in the anode and cathode by power generation and moisture in the air (for example, Patent Document 1). This scavenging process may be performed not only when the fuel cell vehicle is stopped, but also after the fuel cell vehicle has stopped and a predetermined time has elapsed (paragraph [0005] in Patent Document 1, step S20 in FIG. 3). , S32 etc.).

  In Patent Document 1, after the fuel cell vehicle stops, a timing for determining whether or not to perform the scavenging process is set in the timer (16), and the ECU (12) is activated when the timing comes. Then, the ECU (12) activates the temperature sensor (13), and performs a scavenging process when the detected value of the temperature sensor (13) falls below a predetermined value (steps S18 and S20 in FIG. 3 of Patent Document 1). , Paragraphs [0023], [0024]). If the detected value of the temperature sensor (13) is higher than a predetermined value, whether the temperature sensor (13) and the ECU (12) are stopped once, and the ECU (12) is started again after a predetermined time has passed to perform the scavenging process. Whether or not is determined (steps S18 and S26 in FIG. 3 of Patent Document 1 and FIG. 5, paragraph [0031]).

JP 2006-185862 A

  In general, the ECU is composed of a microcomputer, and the microcomputer is configured to be able to execute various operations. For this reason, in Patent Document 1, if the ECU (12) is activated every time the temperature is determined, the power consumption becomes relatively large.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a fuel cell vehicle capable of saving power in connection with the scavenging process of the fuel cell.

  The fuel cell vehicle according to the present invention sets the start temperature of the scavenging process of the fuel cell in advance, and performs the scavenging process when the temperature is equal to or lower than the start temperature of the scavenging process after operation stop, and controls the scavenging process A scavenging control device, a power source for the scavenging control device, a switch provided on a circuit connecting the scavenging control device and the power source, a thermistor whose resistance value changes according to an ambient temperature, and the circuit A thermistor connection circuit connecting the power supply side to the thermistor from the switch, and the thermistor connection circuit, and when the resistance value of the thermistor becomes a value corresponding to the start temperature of the scavenging process or less And a switch control circuit for turning on the switch.

  According to the present invention, it is possible to detect that the temperature is not more than the start temperature of the scavenging process without starting the scavenging control device itself. Therefore, when the scavenging control device is activated to determine whether or not the temperature is equal to or lower than the start temperature of the scavenging process, power saving can be achieved in a configuration that consumes a relatively large amount of power. In particular, in the configuration for determining whether or not the temperature of the scavenging process is equal to or lower than the start temperature of the scavenging process at regular intervals, if the scavenging control device is started many times when the fuel cell vehicle is left for a long time, a lot of power is consumed. Therefore, significant power saving can be achieved.

  The switch control circuit includes a comparator that inverts an output when a resistance value of the thermistor becomes a value corresponding to a start temperature or less of the scavenging process, and the scavenging control device, when the scavenging process ends, The comparator may be stopped.

  The fuel cell vehicle further includes: a second switch provided on the power supply side of a portion where the thermistor connection circuit is connected in a circuit connecting the scavenging control device and the power supply; and the second switch And a timer circuit capable of setting the timing for turning on the.

  The scavenging control device may set a timing for turning on the second switch in the timer circuit when the fuel cell vehicle stops.

  The fuel cell vehicle is further connected to the thermistor connection circuit in parallel with the switch control circuit, and the resistance value of the thermistor becomes a value corresponding to the start temperature of the scavenging process or less. A temperature determination circuit that notifies the scavenging control device, and a third switch that is provided on a circuit that connects the thermistor connection circuit and the temperature determination circuit, and that is turned on and off in response to a command from the scavenging control device, A first resistor is disposed between the thermistor and the switch control circuit, a second resistor is disposed between the thermistor and the temperature determination circuit, and a resistance value of the second resistor. May be set lower than the resistance value of the first resistor.

  The fuel cell vehicle according to the present invention sets the start temperature of the scavenging process of the fuel cell in advance, and performs the scavenging process when the temperature is equal to or lower than the start temperature of the scavenging process after operation stop, and controls the scavenging process A scavenging control device, a power source for the scavenging control device, a switch provided on a circuit connecting the scavenging control device and the power source, a temperature sensor for detecting an ambient temperature, and the temperature sensor detecting A switch control circuit for determining whether or not an ambient temperature is equal to or lower than a start temperature of the scavenging process, and to turn on the switch when the ambient temperature is equal to or lower than the start temperature of the scavenging process. .

  According to the present invention, it is possible to detect that the temperature is not more than the start temperature of the scavenging process without starting the scavenging control device itself. Therefore, when the scavenging control device is activated to determine whether or not the temperature is equal to or lower than the start temperature of the scavenging process, power saving can be achieved in a configuration that consumes a relatively large amount of power. In particular, in the configuration for determining whether or not the temperature of the scavenging process is equal to or lower than the start temperature of the scavenging process at regular intervals, if the scavenging control device is started many times when the fuel cell vehicle is left for a long time, a lot of power is consumed. Therefore, significant power saving can be achieved.

1 is a schematic overall configuration diagram of a portion for determining whether or not a scavenging process is required in a fuel cell vehicle according to a first embodiment of the present invention. It is a circuit diagram which shows the detailed structure of FIG. 5 is a flowchart for performing a scavenging process according to an ambient temperature in the first embodiment. It is a general | schematic whole block diagram of the site | part which determines the necessity of implementation of the scavenging process in the fuel cell vehicle which concerns on 2nd Embodiment of this invention. In 2nd Embodiment, it is a flowchart which performs a scavenging process according to ambient temperature. It is a general | schematic whole block diagram of the site | part which determines the necessity of implementation of the scavenging process in the fuel cell vehicle which concerns on 3rd Embodiment of this invention. It is a circuit diagram which shows the detailed structure of FIG. In 3rd Embodiment, it is a flowchart which performs a scavenging process according to ambient temperature.

1. First Embodiment FIG. 1 shows a portion for determining whether or not a scavenging process is required in a fuel cell vehicle 10 (hereinafter also referred to as “FC vehicle 10”) according to a first embodiment of the present invention (determination of necessity of scavenging process). Part) is a schematic overall configuration diagram. In FIG. 1, numbers in parentheses indicate an example of the order in which various signals are output.

  The FC vehicle 10 includes an ECU 12 (Electric Control Unit) (scavenging control device), a battery 14, a temperature sensor 16, a temperature monitoring circuit 18 having an amplifier circuit 20 and a comparison circuit 22.

  The ECU 12 is mainly composed of a microcomputer, and controls scavenging processing of a fuel cell (not shown) in the FC vehicle 10. The battery 14 is a 12 volt battery, and is connected to the ECU 12, the temperature sensor 16, the amplifier circuit 20, and the comparison circuit 22. A first switch 24 is provided on a first circuit 26 that connects the ECU 12 and the battery 14.

  The temperature sensor 16 is connected to a second circuit 28 (thermistor connection circuit) branched from the first circuit 26. The temperature sensor 16 detects the ambient temperature T [° C.] of the fuel cell, and transmits a signal indicating the ambient temperature T (ambient temperature signal St) to the temperature monitoring circuit 18.

  The amplification circuit 20 of the temperature monitoring circuit 18 amplifies the ambient temperature signal St received from the temperature sensor 16 and transmits it to the comparison circuit 22. The comparison circuit 22 monitors whether or not the ambient temperature T indicated by the amplified ambient temperature signal St is equal to or lower than the scavenging start temperature (hereinafter also referred to as “scavenging start temperature TH_T”) [° C.]. When T is equal to or lower than the scavenging start temperature TH_T, the control signal Sc1 is output to the first switch 24 (the output becomes high). The first switch 24 is turned on by the control signal Sc1. As a result, the electric power from the battery 14 is supplied to the ECU 12, and the ECU 12 is activated.

  A second switch 30 is provided on the third circuit 32 that connects the first circuit 26 and the amplifier circuit 20, and a third switch is provided on the fourth circuit 36 that connects the first circuit 26 and the comparison circuit 22. A switch 34 is provided. The second switch 30 and the third switch 34 are controlled to be turned on / off by a control signal Sc2 from the ECU 12.

  FIG. 2 is a diagram more specifically showing the configuration of FIG. As shown in FIG. 2, the temperature sensor 16 of this embodiment includes a thermistor 40. The thermistor 40 is arranged in parallel to a series circuit including the ECU 12 and the first switch 24. The second circuit 28 that connects the first circuit 26 and the thermistor 40 is provided with a resistor R1.

  The amplifier circuit 20 of the temperature monitoring circuit 18 is an inverting amplifier circuit, and includes an operational amplifier 42 and a resistor R2. The comparison circuit 22 includes a comparator 44, and two resistors R 3 and R 4 are connected between the operational amplifier 42 and the comparator 44. The input voltage Vin1 to the operational amplifier 42 is boosted and output to the comparator 44. This input voltage Vin1 changes according to the resistance value Rs [Ω] of the thermistor 40 that changes according to the ambient temperature T.

  The comparator 44 compares the voltage Vt [V] of the ambient temperature signal St with the voltage Vr [V] of the reference signal Sr. If the voltage Vt is equal to or lower than the voltage Vr, the comparator 44 keeps the output low (does not output the control signal Sc1). When the voltage Vt exceeds the voltage Vr, the comparator 44 makes the output high (outputs the control signal Sc1).

  FIG. 3 shows a flowchart for performing the scavenging process according to the ambient temperature T in the present embodiment. In step S1, when an ignition switch (IGSW) (not shown) is turned off, the ECU 12 outputs a control signal Sc2 to the second switch 30 and the third switch 34, and turns on both switches. In step S2, the temperature sensor 16 detects the ambient temperature T. That is, the thermistor 40 of the temperature sensor 16 changes the resistance value Rs according to the ambient temperature T and generates the ambient temperature signal St, thereby notifying the temperature monitoring circuit 18 of the ambient temperature T.

  In step S3, the temperature monitoring circuit 18 determines whether the ambient temperature T is equal to or lower than the scavenging start temperature TH_T. That is, the comparator 44 of the comparison circuit 22 compares the voltage Vt of the ambient temperature signal St amplified by the operational amplifier 42 of the amplifier circuit 20 with the voltage Vr of the reference signal Sr. If the voltage Vt is equal to or lower than the voltage Vr, the ambient temperature T exceeds the scavenging start temperature TH_T, and if the voltage Vt exceeds the voltage Vr, the ambient temperature T is equal to or lower than the scavenging start temperature TH_T. When the ambient temperature T exceeds the scavenging start temperature TH_T (S3: NO), the comparison circuit 22 does not output the control signal Sc1 (the output of the comparator 44 remains low). Then, the process returns to step S2.

  When the ambient temperature T is equal to or lower than the scavenging start temperature TH_T (S3: YES), the comparison circuit 22 outputs the control signal Sc1 (sets the output of the comparator 44 high). In step S4, the first switch 24 is turned on by the control signal Sc1 from the comparison circuit 22, and the electric power of the battery 14 is supplied to the ECU 12. As a result, the ECU 12 is activated (turned on). In subsequent step S5, the ECU 12 executes a scavenging process.

  When the scavenging process ends, in step S6, the ECU 12 transmits a control signal Sc2 to the second switch 30 and the third switch 34, and turns off both switches. Thereby, the amplifier circuit 20 and the comparison circuit 22 of the temperature monitoring circuit 18 are turned off. As a result, the output of the control signal Sc1 from the comparison circuit 22 is stopped, and the first switch 24 is also turned off. Thereby, in step S7, the power supply from the battery 14 to the ECU 12 is stopped, and the ECU 12 is also turned off.

  As described above, according to the first embodiment, it is possible to detect that the scavenging start temperature is equal to or lower than the scavenging start temperature TH_T without activating the ECU 12 itself. Accordingly, when the ECU 12 is activated to determine whether or not the scavenging start temperature TH_T or lower, power saving can be achieved in a configuration that consumes a relatively large amount of power.

  In the first embodiment, the ECU 12 stops the operational amplifier 42 and the comparator 44 when the scavenging process is finished. When the scavenging process is completed, in the configuration in which the scavenging process is not performed until the next power generation by the fuel cell, the detection of the scavenging start temperature TH_T is unnecessary until the next power generation by the fuel cell. Therefore, when the scavenging process is completed, power saving can be achieved by stopping the operational amplifier 42 and the comparator 44.

2. Second Embodiment FIG. 4 shows a portion (whether or not a scavenging process is required) for determining whether or not a scavenging process is required in a fuel cell vehicle 10A (hereinafter also referred to as “FC vehicle 10A”) according to a second embodiment of the present invention. 1 is a schematic overall configuration diagram of a determination unit). In FIG. 4, numbers in parentheses indicate an example of the order in which various signals are output.

  The FC vehicle 10A of the second embodiment is different from the FC vehicle 10 of the first embodiment in that it includes a fourth switch 50 and a timer circuit 52. In the FC vehicle 10A, the same components as those of the FC vehicle 10 are denoted by the same reference numerals, and description thereof is omitted.

  The 4th switch 50 is provided in the battery 14 side rather than the site | part to which the 2nd circuit 28 was connected among the 1st circuits 26 which connect ECU12 and the battery 14. FIG. Therefore, the power supply from the battery 14 to the ECU 12, the temperature sensor 16, and the temperature monitoring circuit 18 can be controlled by turning on and off the fourth switch 50.

  The timer circuit 52 sets a timing for turning on / off the fourth switch 50 in accordance with a command (control signal Sc3) from the ECU 12, and outputs a control signal Sc4 based on the timing to turn on / off the fourth switch 50. The timing at which the fourth switch 50 is turned on / off is an interval from when an ignition switch (not shown) of the FC vehicle 10A is turned off to when the temperature monitoring circuit 18 first starts monitoring the ambient temperature T (for example, 1 Time) and an interval (for example, every 5 minutes) at which the ambient temperature T is monitored for the second time or later.

  FIG. 5 shows a flowchart for performing the scavenging process according to the ambient temperature T in the second embodiment. In step S11, when an ignition switch (IGSW) (not shown) is turned off, the ECU 12 outputs a control signal Sc1 to the second switch 30 and the third switch 34, and turns on both switches.

  In step S12, the ECU 12 outputs a control signal Sc3 to the timer circuit 52 and sets a timer threshold value TH_TMR. When the timer threshold value TH_TMR is set, the timer circuit 52 transmits the control signal Sc4 to the fourth switch 50 to turn off the fourth switch 50 and stop the ECU 12, the temperature sensor 16, and the temperature monitoring circuit 18. At the same time, the timer value TMR is counted.

  In step S13, the timer circuit 52 determines whether or not the current timer value TMR is equal to or greater than the timer threshold value TH_TMR. When the current timer value TMR is less than the timer threshold TH_TMR (S13: NO), the timing for determining whether or not the scavenging process is necessary has not yet come. Therefore, step S13 is repeated again. If the current timer value TMR is equal to or greater than the timer threshold value TH_TMR (S13: YES), it means that the timing for determining whether or not the scavenging process is necessary has come. Therefore, in step S14, the timer circuit 52 transmits the control signal Sc4 to the fourth switch 50, and turns on the fourth switch 50. Thereby, the battery 14, the temperature sensor 16, the amplifier circuit 20, and the comparison circuit 22 are connected (however, since the first switch 24 is off, it is not connected to the ECU 12). In addition, in step S15, the timer circuit 52 resets the timer value TMR for the next timing determination. Further, if necessary, a timer threshold value TH_TMR used for the next timing determination is set.

  In subsequent step S16, the temperature sensor 16 detects the ambient temperature T. Specifically, the thermistor 40 of the temperature sensor 16 changes the resistance value Rs according to the ambient temperature T and generates the ambient temperature signal St, thereby notifying the temperature monitoring circuit 18 of the ambient temperature T.

  In step S17, the temperature monitoring circuit 18 determines whether or not the ambient temperature T is equal to or lower than the scavenging start temperature TH_T. The determination method here is the same as step S3 in FIG. When the ambient temperature T exceeds the scavenging start temperature TH_T (S17: NO), the comparator 44 does not output the control signal Sc1 (the output of the comparator 44 remains low). Then, returning to step S13, the timer circuit 52 next counts the timing for determining whether or not the scavenging process is necessary. At that time, the control signal Sc4 is transmitted to the fourth switch 50, and the fourth switch 50 is turned off. Therefore, in this determination, the ECU 12 ends without being activated.

  When the ambient temperature T is equal to or lower than the scavenging start temperature TH_T (S17: YES), in step S18, the comparison circuit 22 outputs the control signal Sc1 to the first switch 24 (sets the output of the comparator 44 high). Thereby, the electric power of the battery 14 is supplied to the ECU 12, and the ECU 12 is activated (turned on). In subsequent step S19, the ECU 12 executes a scavenging process.

  In subsequent step S20, the ECU 12 transmits a control signal Sc2 to the second switch 30 and the third switch 34, and turns off both switches. Thereby, the amplifier circuit 20 and the comparison circuit 22 of the temperature monitoring circuit 18 are turned off. As a result, the output of the control signal Sc1 from the comparison circuit 22 is stopped, and the first switch 24 is turned off. Thereby, in step S21, the power supply from the battery 14 to the ECU 12 is stopped, and the ECU 12 is also turned off.

  The ECU 12 may input the next timing for turning on the fourth switch 50 to the timer circuit 52 instead of transmitting the control signal Sc2 to the second switch 30 and the third switch 34. When transmitting the control signal Sc2 to the second switch 30 and the third switch 34, the ECU 12 instructs the timer circuit 52 to turn off the fourth switch 50. Thereby, in step S22, the timer circuit 52 turns off the fourth switch 50.

  As described above, according to the second embodiment, in addition to the effects of the first embodiment, the following effects can be achieved.

  That is, in the second embodiment, it is possible to detect that the scavenging start temperature TH_T or less has been reached without activating the ECU 12 itself. Accordingly, when the ECU 12 is activated to determine whether or not the scavenging start temperature TH_T or lower, power saving can be achieved in a configuration that consumes a relatively large amount of power. In particular, as in the second embodiment, when the timer circuit 52 is used to determine whether or not the scavenging start temperature TH_T is equal to or lower than the scavenging start temperature TH_T, when the FC vehicle 10A is left for a long time, the ECU 12 is repeatedly operated. When activated, a large amount of power is consumed, so that significant power saving can be achieved.

  In the second embodiment, it is not necessary to monitor the scavenging start temperature TH_T until the fourth switch 50 is turned on by the timer circuit 52. Therefore, it is possible to suppress power consumption accompanying monitoring of the scavenging start temperature TH_T and further save power.

3. Third Embodiment FIG. 6 shows a portion for determining whether or not a scavenging process is necessary in a fuel cell vehicle 10B (hereinafter also referred to as “FC vehicle 10B”) according to a third embodiment of the present invention. 1 is a schematic overall configuration diagram of a determination unit). In FIG. 6, numbers in parentheses indicate an example of the order in which various signals are output. FIG. 7 is a diagram more specifically showing the configuration of FIG.

  The FC vehicle 10B according to the third embodiment has the high-precision temperature monitoring circuit 60 and the fifth switch 62, and the temperature monitoring circuit 18 includes the resistor R5 (FIG. 7). And different. In the FC vehicle 10B, the same components as those of the FC vehicle 10A are denoted by the same reference numerals, and the description thereof is omitted.

  The high-accuracy temperature monitoring circuit 60 is connected to the second circuit 28 in parallel with the temperature monitoring circuit 18 (see FIG. 7). The high-accuracy temperature monitoring circuit 60 has a second amplifier circuit 64. The second amplifier circuit 64 amplifies the ambient temperature signal St transmitted from the temperature sensor 16 (thermistor 40) and transmits the amplified signal to the ECU 12.

  The second amplifier circuit 64 is an inverting amplifier circuit, and includes a second operational amplifier 68 and a resistor R6. The input voltage Vin2 to the second operational amplifier 68 is boosted and output to the ECU 12. The input voltage Vin2 changes according to the resistance value Rs of the thermistor 40 that changes according to the ambient temperature T.

  The fifth switch 62 is provided on a fifth circuit 72 that connects the second circuit 28 and the high-accuracy temperature monitoring circuit 60, and is turned on / off in accordance with a command (control signal Sc5) from the ECU 12.

  The resistance value [Ω] of the resistor R7 disposed in front of the second operational amplifier 68 is smaller than the resistance value [Ω] of the resistor R5 disposed in front of the operational amplifier 42. For this reason, more current flows through the high-precision temperature monitoring circuit 60 than in the temperature monitoring circuit 18. Therefore, the high-accuracy temperature monitoring circuit 60 can detect the change in the resistance value Rs of the thermistor 40 with higher accuracy than the temperature monitoring circuit 18. That is, the high-accuracy temperature monitoring circuit 60 can detect the ambient temperature T with higher accuracy than the temperature monitoring circuit 18.

  FIG. 8 shows a flowchart for performing the scavenging process according to the ambient temperature T in the third embodiment. Steps S31 to S38 in FIG. 8 are the same as steps S11 to S18 in FIG.

  In step S39, the ECU 12 transmits a control signal Sc5 to the fifth switch 62 and turns on the fifth switch 62. Thereby, the thermistor 40 and the high-precision temperature monitoring circuit 60 are connected. In subsequent step S40, the ECU 12 performs a scavenging process. At this time, the ECU 12 can use the ambient temperature T detected with high accuracy by the high accuracy temperature monitoring circuit 60. In addition to the scavenging process, the high-accuracy temperature monitoring circuit 60 can be used for detecting the ambient temperature T during normal operation of the fuel cell.

  In step S <b> 41, the ECU 12 stops outputting the control signal Sc <b> 5 to the fifth switch 62 and ends the temperature monitoring by the high-accuracy temperature monitoring circuit 60. Subsequent steps S42 to S44 are the same as steps S20 to S22 of FIG.

  As described above, according to the third embodiment, the following effects can be obtained in addition to the effects of the first embodiment and the second embodiment described above. That is, in the third embodiment, the scavenging start temperature TH_T is monitored by the temperature monitoring circuit 18 with relatively low detection accuracy and power consumption, while the high-accuracy temperature monitoring circuit 60 with relatively high detection accuracy and power consumption is scavenged. It can be used during processing and normal operation of the fuel cell.

4). Modifications It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted based on the contents described in this specification. For example, the following configuration can be adopted.

  In each of the above embodiments, the first switch 24, the second switch 30, the third switch 34, the fourth switch 50, and the fifth switch 62 are used to latch the on / off state and those that do not. Can be appropriately selected.

  In each of the above embodiments, the temperature monitoring circuit 18 is stopped when the scavenging process is finished. However, the temperature monitoring circuit 18 may be stopped when the detection of the ambient temperature T is finished. In this case, the first switch 24 can be latched, and the first switch 24 can be turned off by a control signal from the ECU 12 at the end of the scavenging process.

10, 10A, 10B ... Fuel cell vehicle 12 ... ECU (scavenging control device)
14 ... Battery 18 ... Temperature monitoring circuit (switch control circuit)
24 ... 1st switch 26 ... 1st circuit (circuit which connects ECU and a battery)
28 ... Second circuit (thermistor connection circuit)
40 ... Thermistor 44 ... Comparator 50 ... Fourth switch 52 ... Timer circuit 60 ... High-accuracy temperature monitoring circuit (temperature determination circuit)
62 ... 5th switch 72 ... 5th circuit R5 ... Resistor (1st resistor) R7 ... Resistor (2nd resistor)
T: Ambient temperature TH_T: Scavenging start temperature (starting temperature of scavenging process)

Claims (6)

A fuel cell vehicle that presets the start temperature of the scavenging process of the fuel cell and performs the scavenging process when the temperature is equal to or lower than the start temperature of the scavenging process after operation stop,
A scavenging control device for controlling the scavenging process;
A power supply for the scavenging control device;
A switch provided on a circuit connecting the scavenging control device and the power source;
A thermistor whose resistance value changes according to the ambient temperature;
A thermistor connection circuit for connecting the thermistor and the power supply side of the switch in the circuit;
A fuel cell vehicle, comprising: a switch control circuit that is connected to the thermistor connection circuit and that turns on the switch when a resistance value of the thermistor becomes a value corresponding to a start temperature or less of the scavenging process. . The fuel cell vehicle according to claim 1, wherein
The switch control circuit includes a comparator that inverts an output when the resistance value of the thermistor becomes a value corresponding to the scavenging process start temperature or less,
The scavenging control device stops the comparator when the scavenging process is completed. The fuel cell vehicle according to claim 1 or 2,
The fuel cell vehicle further includes:
Among the circuits for connecting the scavenging control device and the power source, a second switch provided on the power source side than the portion to which the thermistor connection circuit is connected;
A fuel cell vehicle, comprising: a timer circuit capable of setting a timing for turning on the second switch. The fuel cell vehicle according to claim 3, wherein
The scavenging control device sets a timing for turning on the second switch in the timer circuit when the fuel cell vehicle stops. The fuel cell vehicle. In the fuel cell vehicle according to any one of claims 1 to 4,
The fuel cell vehicle further includes:
Temperature determination that is connected to the thermistor connection circuit so as to be in parallel with the switch control circuit, and notifies the scavenging control device that the resistance value of the thermistor has become a value corresponding to the start temperature of the scavenging process or less. Circuit,
A third switch that is provided on a circuit that connects the thermistor connection circuit and the temperature determination circuit, and that is turned on and off in response to a command from the scavenging control device;
With
A first resistor is disposed between the thermistor and the switch control circuit,
A second resistor is disposed between the thermistor and the temperature determination circuit,
The fuel cell vehicle, wherein a resistance value of the second resistor is set lower than a resistance value of the first resistor. A fuel cell vehicle that presets the start temperature of the scavenging process of the fuel cell and performs the scavenging process when the temperature is equal to or lower than the start temperature of the scavenging process after operation stop,
A scavenging control device for controlling the scavenging process;
A power supply for the scavenging control device;
A switch provided on a circuit connecting the scavenging control device and the power source;
A temperature sensor for detecting the ambient temperature;
A switch control circuit that determines whether the ambient temperature detected by the temperature sensor is equal to or lower than a start temperature of the scavenging process, and turns on the switch when the ambient temperature is equal to or lower than the start temperature of the scavenging process; A fuel cell vehicle comprising:

Images