JP2018084329A - Method of supplying hydrogen fuel and hydrogen supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a delay in the time of filling hydrogen fuel to a second FCV vehicle without providing sets of supply facilities such as multistage accumulators and compressors for two vehicles.SOLUTION: A method of supplying hydrogen fuel comprises: a step of, by using information of a first hydrogen fuel container of a first FCV vehicle and information of a second hydrogen fuel container of a second FCV vehicle arrived behind the first FCV, calculating a filling interval time from the point of time when starting filling of hydrogen fuel to the first hydrogen storage container from a multistage accumulator to the start of filling hydrogen fuel to the second hydrogen storage container from the multistage accumulator, in which no period occurs in which in the middle of filling hydrogen fuel to the second hydrogen storage container from the multistage accumulator, filling cannot be performed; and a step of filling hydrogen fuel to the second hydrogen storage container from the multistage accumulator, after the filling interval time passes from the point of time when starting filling hydrogen fuel to the first hydrogen storage container from the multistage accumulator.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a hydrogen fuel supply method and a hydrogen supply system. For example, the present invention relates to a supply system and a method for a general vehicle using hydrogen as a fuel to fill hydrogen at a hydrogen station.

  In addition to conventional fuel oils such as gasoline, hydrogen fuel has attracted attention as a clean energy source in recent years. Along with this, development of fuel cell vehicles (FCVs) using hydrogen fuel as a power source is underway. In order to popularize such fuel cell vehicles (FCV), it is necessary to expand hydrogen stations that can be rapidly filled with hydrogen fuel. In the hydrogen station, in order to quickly fill the FCV vehicle with hydrogen fuel, a multi-stage accumulator including a plurality of accumulators for accumulating the hydrogen fuel compressed to a high pressure by a compressor is arranged. Then, the pressure difference between the pressure in the pressure accumulator and the pressure of the fuel tank of the FCV vehicle is kept large by filling the pressure accumulator to be used, and the hydrogen fuel is rapidly filled from the pressure accumulator to the fuel tank by the pressure difference ( For example, see Patent Document 1).

  In addition, the number of FCV vehicles is still significantly smaller than that of gasoline cars. Therefore, the number of vehicles coming to the hydrogen station is not always crowded. Therefore, at the hydrogen station, a set of supply equipment such as a multistage accumulator and a compressor is arranged, for example, for one vehicle. Therefore, if hydrogen fuel is supplied from the multistage accumulator to the first FCV vehicle, the hydrogen fuel in the multistage accumulator is reduced. Therefore, the accumulator is used to fill the second FCV vehicle. It is necessary to restore the pressure. If the second FCV vehicle arrives at the hydrogen station while hydrogen fuel is being supplied to the first unit, until the return pressure to the pressure accumulator decreased due to the filling of the first FCV vehicle is completed The second FCV vehicle will wait. Therefore, if user vehicles that arrive for filling are concentrated in one hydrogen station, there may be a problem that it takes a long time for filling, including the waiting time. In order to solve such a problem, a plurality of sets of supply equipment such as a multistage accumulator and a compressor may be arranged in the hydrogen station. However, even if individual equipment such as a pressure accumulator and a compressor is arranged, a high cost is required. In a situation where the number of units coming to the hydrogen station is not always congested, it is cost-effective to increase the supply equipment such as multistage accumulators and compressors in the hydrogen station at a large cost. This is also a difficult situation.

  Here, when the first FCV vehicle is supplied with hydrogen fuel from a multistage accumulator and the second FCV vehicle arrives at the hydrogen station while the first unit is supplying hydrogen fuel, In addition, it has been studied to supply hydrogen fuel to the second FCV vehicle directly from the compressor, not from the multistage accumulator (see, for example, Patent Document 2). However, the direct filling from the compressor has a slower filling speed than the differential pressure filling from the multistage accumulator.

JP 2015-197700 A Japanese Patent Laying-Open No. 2006-089927

  Therefore, according to one aspect of the present invention, it is possible to reduce a delay in filling time of hydrogen fuel to the second FCV vehicle without providing a set of supply facilities such as two multistage accumulators and compressors. A hydrogen supply method and a hydrogen supply system are provided.

The hydrogen fuel supply method of one embodiment of the present invention includes:
First information on a first hydrogen storage container mounted on a first fuel cell vehicle is received from a first vehicle-mounted device mounted on a first fuel cell vehicle (FCV) powered by hydrogen fuel. Process,
A step of filling the first hydrogen storage container from the multi-stage pressure accumulator with the hydrogen fuel using the first dispenser of the first and second dispensers commonly connected to the multi-stage pressure accumulator in which the hydrogen fuel is accumulated. When,
After the start of reception of the first information and before the filling of the hydrogen fuel into the first hydrogen storage container is completed, the second fuel cell vehicle (FCV) mounted on the second fuel cell vehicle (FCV) powered by hydrogen fuel is used. Receiving second information relating to the second hydrogen storage container mounted on the second fuel cell vehicle from the two onboard devices;
By using the first and second information, there is no period during which hydrogen fuel cannot be charged from the multistage pressure accumulator to the second hydrogen storage container in the middle of filling. Hydrogen fuel from the multistage pressure accumulator to the first hydrogen storage container Calculating a filling interval time from the first time when filling is started to filling hydrogen fuel into the second hydrogen storage container from the multistage pressure accumulator;
Filling a second hydrogen storage container from the multistage pressure accumulator after the filling interval time has elapsed from the time when the first hydrogen storage container is started to be filled with the hydrogen fuel from the multistage pressure accumulator;
It is provided with.

The multistage accumulator is decompressed by the compressor,
The filling interval time is preferably calculated using the hydrogen supply amount supplied from the compressor to the multistage accumulator by the return pressure from the compressor.

  Further, the filling interval time includes the pressure of the first hydrogen storage container and the pressure of the second hydrogen storage container, the outside air temperature or the temperature of the first and second hydrogen storage containers, and the first and second hydrogen storage containers. It is preferable to calculate using the volume of the hydrogen storage container.

  The filling interval time is preferably calculated using the pressure, temperature, and volume of a plurality of pressure accumulators constituting the multistage pressure accumulator.

  Also, when configuring a multi-stage accumulator using a plurality of stages of accumulators, the volume of the low-pressure bank used first is larger than the accumulators of other banks, or the number of accumulators is large. It is preferable to configure.

The hydrogen supply system of one embodiment of the present invention includes:
A multistage accumulator in which hydrogen fuel is accumulated;
First and second dispensers for supplying hydrogen fuel, commonly connected to the multistage accumulator;
A first hydrogen storage container mounted on a first fuel cell vehicle from a first onboard device mounted on a first fuel cell vehicle (FCV) powered by hydrogen fuel arriving at a hydrogen station. From the second vehicle-mounted device mounted on the second fuel cell vehicle (FCV) powered by the hydrogen fuel arriving at the hydrogen station after the first fuel cell vehicle. A receiving unit for receiving second information related to a second hydrogen storage container mounted on the fuel cell vehicle;
By using the first and second information, there is no period during which hydrogen fuel cannot be charged from the multistage pressure accumulator to the second hydrogen storage container in the middle of filling. Hydrogen fuel from the multistage pressure accumulator to the first hydrogen storage container A filling interval time calculating unit that calculates a filling interval time from the start of charging to the start of filling hydrogen fuel from the multistage accumulator to the second hydrogen storage container;
With
When the first hydrogen storage container is filled using the first dispenser and the filling interval time has elapsed since the start of filling the first hydrogen storage container with hydrogen fuel from the multistage accumulator, The second hydrogen storage container is filled using the second dispenser.

  In addition, in such a filling interval time, when the waiting time from when the second information is received until the second hydrogen storage container starts to fill with hydrogen fuel is larger than the threshold, the filling interval time is shortened, It is also preferable that the second hydrogen storage container is filled with hydrogen fuel at a lower speed than the first hydrogen storage container.

  According to one aspect of the present invention, it is possible to reduce a delay in filling time of hydrogen fuel to the second FCV vehicle without providing a set of supply facilities such as two multistage accumulators and compressors.

1 is an example of a configuration diagram illustrating a configuration of a hydrogen fuel supply system of a hydrogen station in a first embodiment. FIG. 3 is a configuration diagram illustrating an example of an internal configuration of a control circuit according to the first embodiment. It is a figure which shows an example of the time chart of the pressure of each accumulator of the multistage accumulator in Embodiment 1, and the fuel tank pressure of an FCV vehicle. FIG. 3 is a flowchart showing main steps of a hydrogen fuel supply method according to Embodiment 1. It is a figure which shows an example of the time chart of the fuel filling to the two FCV vehicles in Embodiment 1 and a comparative example. 6 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. FIG. FIG. 6 is another modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. 6 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. FIG. 6 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. FIG. 6 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. FIG. 6 is a diagram illustrating an example of an internal configuration of a control circuit according to Embodiment 2. FIG. FIG. 12 is a flowchart showing an internal process of filling flow calculation B in the second embodiment. It is a figure which shows an example of the time chart of the fuel filling to the two FCV vehicles in Embodiment 2, Embodiment 1, and a comparative example.

Embodiment 1 FIG.
FIG. 1 is an example of a configuration diagram illustrating a configuration of a hydrogen fuel supply system of a hydrogen station according to the first embodiment. In FIG. 1, the hydrogen fuel supply system 500 is disposed in the hydrogen station 102. The hydrogen fuel supply system 500 includes a multistage accumulator 101, a plurality of dispensers 30a and 30b, a compressor 40, and a control circuit 100. The multistage accumulator 101 includes a plurality of accumulators 10, 12, and 14 having a multi-stage use lower limit pressure. In the example of FIG. 1, a multistage accumulator 101 is configured by three accumulators 10, 12, and 14. In the example of FIG. 1, the pressure accumulator 10 acts as a low pressure bank (1st bank) that is used until the use lower limit pressure becomes the lowest. The accumulator 12 acts as an intermediate pressure bank (2nd bank) with an intermediate use lower pressure. The accumulator 14 acts as a high pressure bank (3rd bank) with a high use lower limit pressure. In addition, a curdle 302, an intermediate pressure accumulator 304, and / or a hydrogen production apparatus 308 are disposed in the hydrogen station 102. In addition, a hydrogen trailer 306 for filling and delivering hydrogen arrives in the hydrogen station 102.

  In FIG. 1, the suction side of the compressor 40 is connected to the curl 302 by piping through a valve 322. Similarly, the suction side of the compressor 40 is connected to the intermediate pressure accumulator 304 by piping through a valve 324. Similarly, the suction side of the compressor 40 is connected to the filling tank of the hydrogen trailer 306 through a valve 326 by piping. Similarly, the suction side of the compressor 40 is connected to the discharge side of the hydrogen production apparatus 308 through a valve 328 by piping.

  The discharge side of the compressor 40 is connected to the pressure accumulator 10 by piping through the valve 21. Similarly, the discharge side of the compressor 40 is connected to the pressure accumulator 12 by piping through the valve 23. Similarly, the discharge side of the compressor 40 is connected to the pressure accumulator 14 by piping through the valve 25.

  Further, the pressure accumulator 10 is connected to the dispenser 30a via a valve 22a and a pipe, and is connected to the dispenser 30b via a valve 22b via a pipe. The pressure accumulator 12 is connected to the dispenser 30a via a valve 24a and a pipe, and is connected to the dispenser 30b via a valve 24b via a pipe. Further, the pressure accumulator 14 is connected to the dispenser 30a via a valve 26a and a pipe, and is connected to the dispenser 30b via a valve 26b via a pipe. Thus, the dispenser 30 a (first dispenser) and the dispenser 30 b (second dispenser) are connected in common to the pressure accumulators 10, 12, and 14 constituting the multistage pressure accumulator 101.

  Further, the pressure in the curl 302 is measured by a pressure gauge 312. The pressure in the intermediate accumulator 304 is measured by a pressure gauge 314. The pressure in the filling tank of the hydrogen trailer 306 is measured by a pressure gauge 316. The discharge pressure of the hydrogen production device 308 is measured by a pressure gauge 318.

  Further, the pressure in the pressure accumulator 10 is measured by the pressure gauge 11. The pressure in the accumulator 12 is measured by a pressure gauge 13. The pressure in the accumulator 14 is measured by a pressure gauge 15.

  Moreover, the cooler 32a (precooler) is arrange | positioned in the dispenser 30a, and the hydrogen fuel supplied from the multistage pressure accumulator 101 is cooled to -40 degreeC, for example. Therefore, the dispenser 30a fills the cooled hydrogen fuel into the fuel tank 202a mounted on the FCV vehicle 200a (first FCV) using the differential pressure. In addition, a repeater 34a is arranged in or near the dispenser 30a so that it can communicate with the vehicle-mounted device 204a in the FCV vehicle 200a (fuel cell vehicle (FCV) powered by hydrogen fuel) that has arrived at the hydrogen station 102. Composed. For example, it is configured to be capable of wireless communication using infrared rays.

  Similarly, a cooler 32b (precooler) is disposed in the dispenser 30b, and the hydrogen fuel supplied from the multistage pressure accumulator 101 is cooled to, for example, −40 ° C. Therefore, the dispenser 30b fills the cooled hydrogen fuel into the fuel tank 202b mounted on the FCV vehicle 200b (second FCV) using the differential pressure. Further, a repeater 34b is disposed in or near the dispenser 30b, and can communicate with the vehicle-mounted device 204b in the FCV vehicle 200b (fuel cell vehicle (FCV) powered by hydrogen fuel) that has arrived at the hydrogen station 102. Composed. For example, it is configured to be capable of wireless communication using infrared rays.

Under normal conditions, the hydrogen fuel accumulated in the tank of the curdle 302, the intermediate pressure accumulator 304, or the hydrogen trailer 306 is reduced to a low pressure (eg, 0.6 MPa) by each regulator (not shown) controlled by the control circuit 100. It is supplied to the suction side of the compressor 40 in a decompressed state. Similarly, the hydrogen fuel produced by the hydrogen production apparatus 308 is supplied to the suction side of the compressor 40 in a low pressure state (for example, 0.6 MPa). Therefore, the primary side pressure _PIN on the suction side of the compressor 40 is a low pressure during normal times (off-season time zone). Under the control of the control circuit 100, the compressor 40 compresses the hydrogen fuel supplied at a low pressure from the curl 302, the intermediate pressure accumulator 304, the hydrogen trailer 306, or the hydrogen production device 308, and stores each pressure accumulation of the multistage pressure accumulator 101. Supply to vessels 10, 12, and 14. The compressor 40 compresses the accumulators 10, 12, and 14 of the multistage accumulator 101 until a predetermined high pressure (for example, 82 MPa) is reached. In other words, the compressor 40 compresses until the secondary pressure P _OUT on the discharge side reaches a predetermined high pressure (for example, 82 MPa). Whether the partner supplying the hydrogen fuel to the suction side of the compressor 40 is the curdle 302, the intermediate pressure accumulator 304, the hydrogen trailer 306, or the hydrogen production device 308 is arranged on the corresponding pipe. The control circuit 100 may determine whether the valves 322, 324, 326, and 328 are opened or closed. Similarly, the compressor 40 supplies hydrogen fuel to the pressure accumulator 10, 12, or 14 depending on whether the corresponding valves 21, 23, 25 arranged on the respective pipes are opened or closed. 100 may be determined by the control. Or you may control to supply simultaneously to two or more accumulators.

In the above-described example, the case where the pressure _PIN for supplying hydrogen fuel to the suction side of the compressor 40 is controlled to be reduced to a predetermined low pressure (for example, 0.6 MPa) is shown, but the present invention is not limited to this. . The suction side of the compressor 40 without reducing the pressure of the hydrogen fuel accumulated in the cardle 302, the intermediate pressure accumulator 304, or the hydrogen trailer 306, or in a state where the pressure is higher than a predetermined low pressure (for example, 0.6 MPa). May be compressed.

  The hydrogen fuel accumulated in the multistage accumulator 101 is cooled by the cooler 32a in the dispenser 30a, and is supplied from the dispenser 30a to the FCV vehicle 200a that has arrived in the hydrogen station 102. Similarly, the hydrogen fuel accumulated in the multistage accumulator 101 is cooled by the cooler 32b in the dispenser 30b and supplied from the dispenser 30b to the FCV vehicle 200b that has arrived in the hydrogen station 102.

  FIG. 2 is a configuration diagram illustrating an example of an internal configuration of the control circuit according to the first embodiment. 2, in the control circuit 100, there are a communication control circuit 50, a memory 51, a receiving unit 52, an end pressure / temperature calculating unit 54, a flow planning unit 56, a system control unit 58, a return pressure control unit 61, and a supply control unit. 63, a bank pressure receiving unit 66, a filling interval time calculating unit 92, a determining unit 94, and storage devices 80, 82, 84 such as a magnetic disk device are arranged. The return pressure control unit 61 includes a valve control unit 60 and a compressor control unit 62. The supply control unit 63 includes a dispenser control unit 64 and a valve control unit 65. Reception unit 52, end pressure / temperature calculation unit 54, flow planning unit 56, system control unit 58, return pressure control unit 61 (valve control unit 60, compressor control unit 62), supply control unit 63 (dispenser control unit 64, Each of “˜units” such as a valve control unit 65), a bank pressure receiving unit 66, a filling interval time calculating unit 92, and a determining unit 94 includes a processing circuit, and the processing circuit includes an electric circuit, a computer, a processor, A circuit board or a semiconductor device is included. In addition, each “˜unit” may use a common processing circuit (the same processing circuit). Alternatively, different processing circuits (separate processing circuits) may be used. Reception unit 52, end pressure / temperature calculation unit 54, flow planning unit 56, system control unit 58, return pressure control unit 61 (valve control unit 60, compressor control unit 62), supply control unit 63 (dispenser control unit 64, Valve controller 65), bank pressure receiver 66, filling interval time calculator 92, and required input data in calculation unit 94 or the calculated result are stored in memory 51 (not shown) each time.

  Further, in the storage device 80, FCV information such as the pressure and temperature of the fuel tank 202 mounted on the FCV vehicle 200, the volume of the fuel tank 202, the remaining amount of hydrogen fuel corresponding to the FCV information, and the fuel tank 202 are stored. A correlation table 81 indicating a correlation with filling information such as a final pressure to be filled and a final temperature is stored. In the storage device 80, a correction table 83 for correcting the result obtained from the correlation table 81 is stored.

  FIG. 3 is a diagram showing an example of a time chart of the pressure of each accumulator of the multistage accumulator and the fuel tank pressure of the FCV vehicle in the first embodiment. First, referring to FIG. 3, for example, a filling method when one FCV vehicle 200 a arrives at the hydrogen station 102 and the hydrogen pressure differential filling with the multistage accumulator 101 will be described. In FIG. 3, the vertical axis represents pressure, and the horizontal axis represents time. The accumulators 10, 12, and 14 of the multistage accumulator 101 are accumulated at the same pressure P0. On the other hand, the fuel tank 202 of the FCV vehicle 200a that has arrived at the hydrogen station 102 is at a pressure Pa. The case where the filling of the fuel tank 202a of the FCV vehicle 200a is started from such a state will be described.

  First, filling of the fuel tank 202a is started from the pressure accumulator 10 serving as a low-pressure bank. When filling, it is filled at a constant pressure increase rate by a flow rate sensor (not shown). The hydrogen fuel accumulated in the pressure accumulator 10 due to the pressure difference between the pressure accumulator 10 and the fuel tank 202a moves toward the fuel tank 202a, and the pressure in the fuel tank 202a gradually increases as indicated by the dotted line A. . Accordingly, the pressure of the accumulator 10 (a graph indicated by “low”) gradually decreases. When the time T1 ′ elapses from the start of filling when the pressure difference between the pressure accumulator 10 and the fuel tank 202a reaches a predetermined value, the pressure accumulator used for the pressure accumulator 12 serving as an intermediate pressure bank from the pressure accumulator 10 is Can be switched. As a result, the pressure difference between the pressure accumulator 12 and the fuel tank 202a increases, so that a state where the filling speed is high can be maintained. Then, the hydrogen fuel accumulated in the pressure accumulator 12 by the pressure difference between the pressure accumulator 12 and the fuel tank 202a moves to the fuel tank 202a side, and the pressure in the fuel tank 202a gradually increases as indicated by the dotted line A. I will do it. Accordingly, the pressure of the accumulator 12 (a graph indicated by “medium”) gradually decreases. Then, when the time T2 ′ has elapsed from the start of filling when the pressure difference between the pressure accumulator 12 and the fuel tank 202a reaches a predetermined value, the pressure accumulator used for the pressure accumulator 14 serving as a high pressure bank is switched from the pressure accumulator 12. It is done. Thereby, since the differential pressure between the pressure accumulator 14 and the fuel tank 202a is increased, a state where the filling speed is high can be maintained. Then, the hydrogen fuel accumulated in the pressure accumulator 14 due to the pressure difference between the pressure accumulator 14 and the fuel tank 202a moves toward the fuel tank 202a, and the pressure in the fuel tank 202a gradually increases as indicated by the dotted line A. I will do it. Accordingly, the pressure of the accumulator 14 (a graph indicated by “high”) gradually decreases. Then, the pressure is accumulated by the pressure accumulator 14 serving as a high-pressure bank until the pressure of the fuel tank 202a reaches a final pressure PF (for example, 65 to 81 MPa) assuming a calculated tank temperature described later.

  Next, the system control unit 58 reads out control data for a filling flow plan to be described later from the storage device 82, and controls the return pressure control unit 61 and the supply control unit 63 along the control data. Specifically, the system control unit 58 controls the valve control unit 60, the compressor control unit 62, the dispenser control unit 64, and the valve control unit 65. The valve control unit 60 outputs control signals to the valves 21, 23, 25 and the valves 322, 324, 326, 328 via the communication control circuit 50 to control the opening / closing of each valve. The dispenser control unit 64 communicates with the dispenser 30a via the communication control circuit 50 and controls the operations of the dispensers 30a and 30b. The valve control unit 65 outputs a control signal to the valves 22a, 22b, 24a, 24b, 26a, and 26b via the communication control circuit 50, and controls opening and closing of each valve.

  In the case of following the example of FIG. 3, the valve control unit 60 controls the valves 21, 23, and 25 to be closed. The valve control unit 65 opens the valve 22a from the state in which the valves 22a, 22b, 24a, 24b, 26a, and 26b are closed. Thereby, the atmosphere in piping between the pressure accumulator 10 used as a low voltage bank and the dispenser 30a is connected. Then, the dispenser controller 64 controls the dispenser 30a, and the hydrogen fuel accumulated in the accumulator 10 is started to fill the fuel tank 202a of the FCV vehicle 200a. When time T1 'elapses from the start of filling, the valve controller 65 closes the valve 22a and opens the valve 24a instead. Thereby, the atmosphere in piping between the pressure accumulator 12 used as an intermediate pressure bank and the dispenser 30a is connected. Then, the hydrogen fuel accumulated in the pressure accumulator 12 is started to fill the fuel tank 202a of the FCV vehicle 200a by the dispenser 30a controlled by the dispenser control unit 64. When the time T2 'elapses from the start of filling, the valve control unit 65 closes the valve 24a and opens the valve 26a instead. Thereby, the atmosphere in piping between the pressure accumulator 14 used as a high voltage bank and the dispenser 30a is connected. Then, the hydrogen fuel accumulated in the accumulator 14 is started to fill the fuel tank 202a of the FCV vehicle 200a by the dispenser 30a controlled by the dispenser control unit 64. The system control unit 58 monitors the pressure of the fuel tank 202a received by the receiving unit 52, and ends the filling when the pressure of the fuel tank 202a reaches the final pressure PF. The control unit 64 is controlled. Along with this, the dispenser controller 64 stops the supply of hydrogen fuel by the dispenser 30a, and the valve controller 65 closes the valve 26a.

  Thus, the filling (supply) of the hydrogen fuel to the fuel tank 202a of the FCV vehicle 200a is completed, the nozzle of the dispenser 30a is removed from the receptacle (receptacle) of the fuel tank 202a of the FCV vehicle 200a, and the user can set the filling amount to, for example, A corresponding fee will be paid to leave the hydrogen station 102.

  On the other hand, the hydrogen fuel in each of the pressure accumulators 10, 12, and 14 is reduced by such filling, and the pressure is lowered. Therefore, the bank pressure receiving unit 66 receives the pressures of the pressure accumulators 10, 12, and 14 from the pressure gauges 11, 13, and 15 through the communication control circuit 50 at all times or at a predetermined sampling period. 84.

  And since the pressure in each pressure accumulator 10,12,14 is falling by filling to the fuel tank 202a of the FCV vehicle 200a, the pressure-reduction mechanism 104 decompresses each pressure accumulator 10,12,14. The compressor 40, the valves 21, 23, 25, the valves 322, 324, 326, 328, etc. constitute the return pressure mechanism 104. First, the system control unit 58 selects a supply source of hydrogen fuel to be connected to the suction side of the compressor 40 from the curl 302, the intermediate pressure accumulator 304, the hydrogen trailer 306, or the hydrogen production apparatus 308. Then, the return pressure control unit 61 controls the return pressure mechanism 104 under the control of the system control unit 58 to return the pressure accumulators 10, 12, and 14. Specifically, first, the valve control unit 60 controls the hydrogen fuel selected from the curdle 302, the intermediate pressure accumulator 304, the hydrogen trailer 306, or the hydrogen production device 308 under the control of the system control unit 58. One valve (valve 322, 324, 326, or 328) as a supply source is controlled from a closed state to an open state. Thereby, the low-pressure hydrogen fuel is supplied to the suction side of the compressor 40.

  The pressure accumulator of each bank used for filling the fuel tank 202a of the FCV vehicle 200a is also re-pressured during filling. However, since there is not enough time for the pressure to be restored to the specified pressure, the pressure must be restored after filling. Since the switching is performed in the order of the low pressure bank, the intermediate pressure bank, and the high pressure bank, first, the pressure accumulator 10 serving as the low pressure bank is restored. The valve control unit 60 opens the valve 21 from the state in which the valves 21, 23, 25 are closed.

  Then, the compressor control unit 62 drives the compressor 40 to send out low-pressure (for example, 0.6 MPa) hydrogen fuel while compressing, and the pressure of the pressure accumulator 10 becomes a predetermined pressure P0 (for example, 82 MPa). Until the pressure accumulator 10 is filled with hydrogen fuel, the pressure accumulator 10 is decompressed.

  Next, the valve control unit 60 closes the valve 21 and opens the valve 23 instead.

  Then, the compressor control unit 62 drives the compressor 40 to send out low-pressure (for example, 0.6 MPa) hydrogen fuel while compressing it, and the pressure of the pressure accumulator 12 becomes a predetermined pressure P0 (for example, 82 MPa). Until the pressure accumulator 12 is filled with hydrogen fuel, the pressure accumulator 12 is decompressed.

  Next, the valve control unit 60 closes the valve 23 and opens the valve 25 instead.

  Then, the compressor control unit 62 drives the compressor 40 to send out low-pressure (for example, 0.6 MPa) hydrogen fuel while compressing, and the pressure of the pressure accumulator 14 becomes a predetermined pressure P0 (for example, 82 MPa). Until the pressure accumulator 14 is filled with hydrogen fuel, the pressure accumulator 14 is decompressed.

  As described above, even when the next FCV vehicle 200b arrives at the hydrogen station 102, hydrogen fuel can be similarly supplied. It takes several minutes (for example, 3 to 5 minutes) to fill the FCV vehicle 200a described above, and several minutes (for example, 7 to 12 minutes) to restore the multistage accumulator 101, and a series of cycles from filling to completion of the decompression is performed. For example, it is performed for about 10 to 15 minutes (for example, 12 minutes). Therefore, even if the FCV vehicle 200a arrives at the hydrogen station 102 at an interval of 4 to 6 vehicles (for example, 5 vehicles) per hour, the FCV vehicles 200a and 200b are charged with hydrogen without waiting for filling by the same cycle. Fuel supply can be received. However, as described above, if user vehicles that arrive for filling are concentrated in one hydrogen station 102, the time required for filling including the waiting time becomes long. Here, when the next FCV vehicle 200b is charged after waiting for the completion of the return of the multistage pressure accumulator 101, the return time is taken as a waiting time. Therefore, in the first embodiment, in addition to the dispenser 30a, a second dispenser 30b is further arranged to form a double dispenser configuration. And it is comprised so that 2 units | sets of FCV vehicles 200a and 200b can receive filling with hydrogen fuel in parallel using this double dispenser. The user usually arrives at the hydrogen station 102 before the remaining amount of the fuel tank 202 (202b) of the FCV vehicle 200a (200b) reaches, for example, about 30% of the full tank so as not to run out of fuel. . However, with only the conventional multi-stage accumulator 101, it is assumed that hydrogen fuel itself or the pressure for performing differential pressure filling is insufficient to fill the two FCV vehicles 200a and 200b in parallel. The Therefore, it is assumed that the hydrogen fuel itself or the pressure for performing the differential pressure filling is insufficient during filling, and a period during which filling cannot be performed occurs. And even if the accumulator returns to a pressure that can be filled, it is assumed that the filling speed cannot be obtained because the differential pressure is not sufficient, and it takes a long time to complete filling. The

  As a result of studying such a problem, when the second FCV vehicle 200b arrives at the hydrogen station 102 while the first FCV vehicle 200a is being charged with hydrogen fuel, the second FCV vehicle 200b immediately arrives after the arrival. Instead of starting the filling of the hydrogen fuel into the vehicle 200b by using the second dispenser 30b, a predetermined filling interval is intentionally left from the time when the filling of the hydrogen fuel into the first FCV vehicle 200a is started. The start of filling hydrogen fuel into the second FCV vehicle 200b using the second dispenser 30b eliminates the period during which hydrogen fuel cannot be filled in the second FCV vehicle 200b. As a result, it has been found that there is a case where the end timing of filling the second FCV vehicle 200b with hydrogen fuel can be advanced. Further, as a result of this, hydrogen fuel filling to the second FCV vehicle 200b is completed after the filling of the hydrogen fuel into the first FCV vehicle 200a is completed and the return pressure to each of the pressure accumulators 10, 12, and 14 is completed. Needless to say, the end timing of the filling of the hydrogen fuel into the second FCV vehicle 200b is earlier than when the filling of the fuel is started. Therefore, in the first embodiment, two FCV vehicles 200a and 200b can be charged in parallel with hydrogen fuel using one multistage accumulator 101, and the second FCV vehicle 200b. In order to eliminate the period during which hydrogen fuel cannot be charged in the middle of charging, a filling interval is provided to shift the filling start timing of the first and second units. This will be specifically described below.

  FIG. 4 is a flowchart showing main processes of the hydrogen fuel supply method according to the first embodiment. In FIG. 4, the hydrogen fuel supply method in the first embodiment includes FCV information (A) reception step (S102), filling flow calculation (A) step (S104), A low pressure bank filling step (S106), FCV information (B) reception step (S108), filling interval calculation step (S110), filling flow calculation (B) step (S112), determination step (S114), A intermediate pressure bank filling step (S120), , A high pressure bank filling step (S122), B low pressure bank filling step (S130), B medium pressure bank filling step (S132), and B high pressure bank filling step (S134).

  In the FCV information (A) reception step (S102), the reception unit 52 includes a vehicle-mounted device 204a (first vehicle-mounted) mounted on an FCV vehicle 200a (first fuel cell vehicle (FCV)) that uses hydrogen fuel as a power source. FCV information (A) (first information) related to the fuel tank 202a (first hydrogen storage container) mounted on the FCV vehicle 200a is received from the device. Specifically, it operates as follows. When the first FCV vehicle 200a arrives in the hydrogen station 102 and the nozzle of the dispenser 30a is fixed to the receptacle (receptacle) of the fuel tank 202a of the FCV vehicle 200a by the user or an operator of the hydrogen station 102, the vehicle-mounted device Communication between 204a and repeater 34a is established. When communication is established, FCV information (A) such as the current pressure and temperature of the fuel tank 202a and the volume of the fuel tank 202a is output to the control circuit 100 via the relay 34a in real time. (Call).

  In the control circuit 100, the receiving unit 52 receives the FCV information (A) via the communication control circuit 50. The FCV information (A) is monitored constantly or at a predetermined sampling interval while communication between the vehicle-mounted device 204a and the relay device 34a is established. The received FCV information (A) is stored in the storage device 82 together with information on the reception time. Further, the outside air temperature is also measured by a measuring instrument (not shown).

  As the filling flow calculation (A) step (S104), the end pressure / temperature calculation unit 54 first reads the conversion table 81 from the storage device 80, and receives the received initial pressure, temperature, and fuel tank of the fuel tank 202a. The final pressure PF and the final temperature corresponding to the volume of 202a and the outside air temperature are calculated and predicted. The end pressure / temperature calculation unit 54 reads the correction table 83 from the storage device 80 and corrects the numerical value obtained by the conversion table 81. The correction table 83 may be provided on the basis of the result obtained by experiment or simulation or the like when the error is large in the obtained result only with the data of the conversion table 81.

  Next, the flow planning unit 56 uses the multistage accumulator 101 to create a filling flow plan for supplying (filling) hydrogen fuel with a differential pressure to the fuel tank 202a of the FCV vehicle 200a. As described with reference to FIG. 3, the flow planning unit 56 selects the accumulator (selection of the accumulators 10, 12, and 14) for the calculated pressure of the fuel tank 202 to be the final pressure PF, and the multistage accumulator 101. A filling flow plan including the timing of switching is prepared. In this way, the time T3 from the start of filling to reach the final pressure PF is obtained. The filling flow plan control data created in such a case is temporarily stored in the storage device 82. In the above-described example, the case where the pressure Pa of the fuel tank 202a of the FCV vehicle 200a arriving at the hydrogen station 102 is sufficiently lower than the lower limit pressure of the pressure accumulator 10 serving as a preset low pressure bank is shown. ing. As an example, the case of a sufficiently low state such as 1/2 or less when the tank is full is shown. In such a case, for example, three accumulators 10, 12, and 14 are required to quickly fill the final pressure PF with the pressure of the fuel tank 202a of the FCV vehicle 200a. However, the FCV vehicle 200a arriving at the hydrogen station 102 is not limited to the case where the pressure of the fuel tank 202a is sufficiently low. When the pressure in the fuel tank 202a is higher than, for example, 1/2 when the tank is full, for example, two pressure accumulators 10 and 12 may be sufficient. Furthermore, when the pressure of the fuel tank 202a is high, for example, one pressure accumulator 10 may be sufficient. In any case, the pressure accumulators used in the order of the pressure accumulators 10, 12, and 14 are switched.

  As the A low pressure bank filling step (S106), the supply unit 106 fills the fuel tank 202a with hydrogen fuel from the multistage accumulator 101 using the dispenser 30a (starts filling). The supply unit 106 includes, for example, a multistage accumulator 101, valves 22a, 22b, 24a, 24b, 26a, 26b, and dispensers 30a, 30b related to the filling operation. Specifically, it operates as follows. The system control unit 58 reads the filling flow plan control data from the storage device 82, and controls the supply control unit 63 along the control data. The supply control unit 63 controls the supply unit 106 under the control of the system control unit 58 to supply hydrogen fuel to the fuel tank 202a of the FCV vehicle 200a. Specifically, the system control unit 58 controls the dispenser control unit 64 and the valve control unit 65. The dispenser control unit 64 communicates with the dispenser 30a via the communication control circuit 50 and controls the operation of the dispenser 30a. The valve control unit 65 outputs a control signal to the valves 22a, 22b, 24a, 24b, 26a, and 26b via the communication control circuit 50, and controls opening and closing of each valve.

  In the FCV information (B) reception step (S108), the reception unit 52 receives the FCV vehicle 200b (second fuel cell vehicle (FCV)) that uses hydrogen fuel that arrives at the hydrogen station 102 after the FCV vehicle 200a as a power source. FCV information (B) (second information) relating to the fuel tank 202b (second hydrogen storage container) mounted on the FCV vehicle 200b is received from the vehicle-mounted device 204b (second vehicle-mounted device) mounted on the vehicle. Specifically, the hydrogen fuel to the fuel tank 202a (first hydrogen storage container) after the start of reception of FCV information (first information) of the FCV vehicle 200a in the FCV information (A) receiving step (S102). The FCV information (B) (second information) of the FCV vehicle 200b is received before the charging of is completed. When the second FCV vehicle 200b arrives in the hydrogen station 102 and the nozzle of the dispenser 30b is fixed to the receptacle (receptacle) of the fuel tank 202b of the FCV vehicle 200b by the user or an operator of the hydrogen station 102, the vehicle-mounted device Communication between 204b and repeater 34b is established. When communication is established, FCV information (B) such as the current pressure and temperature of the fuel tank 202b and the volume of the fuel tank 202b is output in real time to the control circuit 100 via the repeater 34b. (Call).

  In the control circuit 100, the receiving unit 52 receives the FCV information (B) of the FCV vehicle 200b via the communication control circuit 50. The FCV information (B) of the FCV vehicle 200b is monitored constantly or at a predetermined sampling interval while communication between the vehicle-mounted device 204a and the relay device 34a is established. The received FCV information (B) of the FCV vehicle 200b is stored in the storage device 82 together with the reception time information. Further, the outside air temperature is also measured by a measuring instrument (not shown).

  As the filling interval calculation step (S110), the filling interval time calculation unit 92 uses the FCV information (A) and the FCV information (B) to supply hydrogen from the multistage accumulator 101 to the fuel tank 202b of the second FCV vehicle 200b. Filling from when multi-stage pressure accumulator 101 starts filling hydrogen fuel into fuel tank 202a until the start of filling hydrogen fuel from multi-stage pressure accumulator 101 to fuel tank 202b does not occur during a period during which fuel cannot be filled. The interval time t is calculated.

  FIG. 5 is a diagram showing an example of a time chart of fuel filling to two FCV vehicles in the first embodiment and the comparative example. In FIG. 5, the time from the filling start time T0 of hydrogen fuel to the first FCV vehicle 200a to the filling completion time T3 is indicated by time t1 (A vehicle filling time). In the first embodiment, the time from the filling start time T2 of hydrogen fuel to the second FCV vehicle 200b to the filling completion time T4 is indicated by time t2 (B vehicle filling time). Further, the pressure accumulators 10, 12, and 14 using the time from the hydrogen fuel filling start time T0 to the first FCV vehicle 200a to the hydrogen fuel filling completion time T4 to the second FCV vehicle 200b are used. This is indicated by a return time t3 for returning pressure. That is, in the first embodiment, the reduced pressure is restored regardless of whether or not each of the accumulators 10, 12, and 14 in which hydrogen fuel is reduced by use is being used to fill any FCV vehicle. For example, at the vehicle A filling time t1, the three pressure accumulators 10, 12, and 14 are sequentially used to fill the first FCV vehicle 200a with hydrogen fuel. Therefore, in Embodiment 1, the return pressure to the pressure accumulator 10 is also started immediately after the use of the pressure accumulator 10 is started. Thereby, the reduction | decrease speed of the hydrogen fuel in the pressure accumulator 10 can also be made somewhat slow.

  Then, as shown in FIG. 3, after the accumulator used for filling the second FCV vehicle 200b with hydrogen fuel is switched from the accumulator 10 to the accumulator 12, for example, the second FCV The pressure accumulator 10 is continuously decompressed until the pressure accumulator 10 is used to fill the vehicle 200b with hydrogen fuel or until the time when the pressure in the pressure accumulator 10 reaches a predetermined pressure (P0).

  Then, as shown in FIG. 3, when the pressure accumulator 10 starts to be used for filling the second FCV vehicle 200 b with hydrogen fuel, next, the return pressure to the pressure accumulator 12 is started. Then, as shown in FIG. 3, for example, until the pressure accumulator 12 is used to fill the second FCV vehicle 200b with hydrogen fuel, or the pressure in the pressure accumulator 12 becomes a predetermined pressure (P0). The pressure accumulator 12 continues to be decompressed until the time that comes before.

  Then, as shown in FIG. 3, when the pressure accumulator 12 starts to be used for filling hydrogen fuel into the second FCV vehicle 200 b, next, the return pressure to the pressure accumulator 14 is started. Then, as shown in FIG. 3, for example, the pressure accumulator 14 is continuously decompressed until the pressure in the pressure accumulator 14 reaches a predetermined pressure (P0).

  Here, in FIG. 5, the time obtained by subtracting the B vehicle filling time t2 from the decompression time t3 is the hydrogen fuel filling start time T0 to the first FCV vehicle 200a and the hydrogen to the second FCV vehicle 200b. This is the filling interval t up to the fuel filling start time T2.

The amount of hydrogen fuel Qa charged in the fuel tank 202a of the first FCV vehicle 200a at the start time T0 of filling hydrogen fuel into the first FCV vehicle 200a, and hydrogen fuel to the second FCV vehicle 200b The amount of hydrogen fuel Qb charged in the fuel tank 202b of the second FCV vehicle 200b at the charging start time T2 of the first fuel is stored in the pressure accumulator 10 at the charging start time T0 of hydrogen fuel into the first FCV vehicle 200a. The amount of hydrogen fuel Q1, the amount Q2 of hydrogen fuel accumulated in the pressure accumulator 12, the amount Q3 of hydrogen fuel accumulated in the pressure accumulator 14, and the pressure accumulator 10, 12, 14 from the accumulator 10, 12 to the fuel tank 202a Filling speed α at which hydrogen fuel is filled (hydrogen fuel amount per unit time), filling in which fuel tank 202b is filled with hydrogen fuel from each accumulator 10, 12, 14 Degree β (amount of hydrogen fuel per unit time) and a filling speed γ (amount of hydrogen fuel per unit time) for filling the accumulator 10, 12, 14 from the compressor 40 with hydrogen fuel are used. And when executing the time chart of Embodiment 1 shown in FIG. 5, the following relational expression (1) is formed.
(1) Qa + α · t1 + Qb + β · t2 ≦ Q1 + Q2 + Q3 + γ · t3

Therefore, in Embodiment 1, the filling interval t is calculated so that the following expression (1) is established. Note that the decompression time t3 can be defined by the following equation (2).
(2) t3 = t2 + t

Therefore, by substituting equation (2) into equation (1), equation (1) can be transformed into equation (3).
(3) Qa + α · t1 + Qb + β · t2 ≦ Q1 + Q2 + Q3 + γ · (t2 + t)

Further, the amount Qa of hydrogen fuel charged in the fuel tank 202a of the first FCV vehicle 200a is expressed by the pressure Pa, the temperature Ta, and the FCV information (A) as shown in the following function equation (4). It is defined by a function F (P, T, V) using the volume Va of the fuel tank 202a.
(4) Qa = F (Pa, Ta, Va)

Similarly, the amount of hydrogen fuel Qb charged in the fuel tank 202b of the second FCV vehicle 200b is expressed by the pressure Pb, temperature Tb, FCB information (B), as shown in the following function equation (5). And a function F (P, T, V) using the volume Vb of the fuel tank 202b.
(5) Qb = F (Pb, Tb, Vb)

Further, the amount Q1 of the hydrogen fuel in the pressure accumulator 10 is determined by the pressure P1 and the temperature of the pressure accumulator 10 at the start time T0 of filling the hydrogen fuel into the first FCV vehicle 200a as shown in the following function equation (6). It is defined by a function F (P, T, V) using T1 and the volume V1 of the pressure accumulator 10.
(6) Q1 = F (P1, T1, V1)

Similarly, the amount Q2 of hydrogen fuel in the pressure accumulator 12 is equal to the pressure P2 of the pressure accumulator 10 at the start time T0 of filling hydrogen fuel into the first FCV vehicle 200a, as shown in the following function equation (7). It is defined by a function F (P, T, V) using the temperature T2 and the volume V2 of the pressure accumulator 12.
(7) Q2 = F (P2, T2, V2)

Similarly, the amount Q3 of hydrogen fuel in the pressure accumulator 14 is equal to the pressure P3 of the pressure accumulator 14 at the start time T0 of filling hydrogen fuel into the first FCV vehicle 200a, as shown in the following function equation (8). It is defined by a function F (P, T, V) using the temperature T3 and the volume V3 of the pressure accumulator 14.
(8) Q3 = F (P3, T3, V3)

  Further, a filling speed α (hydrogen fuel amount per unit time) at which the fuel tank 202a is filled from each of the pressure accumulators 10, 12, and 14 and a hydrogen fuel from each of the pressure accumulators 10, 12, and 14 to the fuel tank 202b As described above, the filling speed β (the amount of hydrogen fuel per unit time) is controlled so as to have a constant pressure increase rate by a flow rate sensor (not shown). The filling rate α is defined as a function of the rate of pressure increase, the volume of the fuel tank 202a, and the temperature of the fuel tank 202a. Similarly, the filling rate β is defined as a function of the rate of pressure increase, the volume of the fuel tank 202b, and the temperature of the fuel tank 202b. In order to make the filling speed variable instead of a constant speed, a variably set value may be used. Further, the filling speed γ (the amount of hydrogen fuel per unit time) with which the hydrogen fuel is filled in order to return the pressure accumulators 10, 12, 14 from the compressor 40 is determined in advance by the performance of the compressor 40.

  Further, since the filling flow plan is calculated and created in the filling flow calculation (A) step (S104), the A vehicle filling time t1 has already been obtained from this plan. Therefore, if the B vehicle filling time t2 can be obtained, the filling interval time t can be obtained from the equation (3). Therefore, first, the B vehicle filling time t2 is calculated.

  The end pressure / temperature calculator 54 reads the conversion table 81 from the storage device 80, and receives the final pressure Pb, temperature Tb, volume Vb of the fuel tank 202a, and the outside air temperature corresponding to the received fuel tank 202b. The pressure PF and final temperature are calculated and predicted. The end pressure / temperature calculation unit 54 reads the correction table 83 from the storage device 80 and corrects the numerical value obtained by the conversion table 81. The correction table 83 may be provided on the basis of the result obtained by experiment or simulation or the like when the error is large in the obtained result only with the data of the conversion table 81.

  Next, the flow planning unit 56 uses the multistage accumulator 101 to create a filling flow plan for supplying (filling) hydrogen fuel with a differential pressure to the fuel tank 202b of the FCV vehicle 200b. Here, in order to simplify the calculation model, the flow planning unit 56 may calculate by assuming that the pressure accumulators 10, 12, and 14 are all at a predetermined pressure P0. In this way, the B vehicle filling time t2 from the filling start time T2 to reach the final pressure PF is obtained. The filling flow plan control data created in such a case is temporarily stored in the storage device 82.

  Next, the filling interval time calculation unit 92 calculates Qa, Qb, Q1, Q2, and Q3 using the above-described equations (4) to (8).

  Next, the filling interval time calculation unit 92 calculates the filling interval time t by substituting each obtained parameter into the equation (3). As described above, the filling interval time t is calculated using the hydrogen supply amounts (Q1, Q2, and Q3) supplied from the compressor 40 to the multistage accumulator 101 by the return pressure of the compressor 40. In other words, the filling interval time t is calculated using the pressures P1, P2, and P3 of the plurality of pressure accumulators 10, 12, and 14 constituting the multistage pressure accumulator 101. In other words, the filling interval time t is different from the pressure Pa and temperature Ta of the fuel tank 202a of the first FCV vehicle 200a, the volume Va and the pressure Pb and temperature of the fuel tank 202b of the second FCV vehicle 200b. Calculation is performed using Tb and volume Vb.

  As the filling flow calculation (B) step (S112), the flow planning unit 56 uses the multistage accumulator 101 again to supply a filling flow plan for filling (filling) the hydrogen fuel into the fuel tank 202b of the FCV vehicle 200b. Create As described with reference to FIG. 3, the flow planning unit 56 selects the accumulator (selection of the accumulators 10, 12, and 14) for the calculated pressure of the fuel tank 202 to be the final pressure PF, and the multistage accumulator 101. A filling flow plan including the timing of switching is prepared. Since the filling interval time t is obtained this time, it is possible to estimate the pressure change due to the pressure of each of the accumulators 10, 12, and 14 at the filling start time T2 and the return pressure. Therefore, it is preferable that the flow planning unit 56 creates a filling flow plan on the assumption of the pressure state of each of the accumulators 10, 12, and 14 and the pressure change due to the return pressure. The filling flow plan control data created in such a case is temporarily stored in the storage device 82. In the example of FIG. 5, the case where the pressure Pb of the fuel tank 202b of the FCV vehicle 200b arriving at the hydrogen station 102 is sufficiently lower than the lower limit pressure of the pressure accumulator 10 serving as a preset low pressure bank. Show. As an example, the case of a sufficiently low state such as 1/2 or less when the tank is full is shown. In such a case, for example, three accumulators 10, 12, and 14 are necessary to quickly fill the final pressure PF with the pressure of the fuel tank 202b of the FCV vehicle 200b. However, the FCV vehicle 200b arriving at the hydrogen station 102 is not limited to the case where the pressure of the fuel tank 202b is sufficiently low. When the pressure of the fuel tank 202b is higher than, for example, 1/2 when the tank is full, for example, two pressure accumulators 10 and 12 may be sufficient. Furthermore, when the pressure of the fuel tank 202b is high, for example, one pressure accumulator 10 may be sufficient. In any case, the pressure accumulators used in the order of the pressure accumulators 10, 12, and 14 are switched.

  As a determination step (S114), the determination unit 94 determines whether or not the filling interval time t has elapsed from the hydrogen fuel filling start time T0 to the first FCV vehicle 200a. If the filling interval time t has not elapsed, the determination step (S114) is repeated until it has elapsed.

  Note that the first FCV vehicle 200a is continuously charged with hydrogen fuel during the period from the FCV information (B) reception step (S108) to the determination step (S114). Therefore, as shown in FIG. 3, the A low-pressure bank filling step (S106) continues to be performed from time T0 to time T1 'for filling the first FCV vehicle 200a with hydrogen fuel.

  As the A intermediate pressure bank filling step (S120), the supply unit 106 determines when the pressure accumulator 10 reaches a predetermined lower limit pressure (or when the pressure difference between the pressure accumulator 10 and the fuel tank 202a becomes smaller than the threshold value. ), The pressure accumulator that supplies the hydrogen fuel to the dispenser 30a is changed from the pressure accumulator 10 serving as the low pressure bank to the medium pressure bank independently of the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b. Switch to the accumulator 12. Then, the supply unit 106 supplies hydrogen fuel from the pressure accumulator 12 to the fuel tank 202a of the first FCV vehicle 200a using the dispenser 30a.

  As the A high pressure bank filling step (S122), the supply unit 106 determines when the pressure accumulator 12 reaches a predetermined use lower limit pressure (or when the pressure difference between the pressure accumulator 12 and the fuel tank 202a becomes smaller than the threshold). In the case where the filling from the pressure accumulator 12 is not yet completed, the fuel tank 202a is not completely filled. The hydrogen fuel is charged into the dispenser 30a independently of the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b. The accumulator for supplying the fuel is switched from the accumulator 12 serving as an intermediate pressure bank to the accumulator 14 serving as a high pressure bank. Then, the supply unit 106 supplies hydrogen fuel from the pressure accumulator 14 to the fuel tank 202a of the first FCV vehicle 200a using the dispenser 30a.

  Thereby, the filling of the hydrogen fuel into the fuel tank 202a of the first FCV vehicle 200a is completed.

  On the other hand, the fuel tank 202b of the second FCV vehicle 200b from the multistage pressure accumulator 101 is passed after the filling interval time t has elapsed from the filling start time T0 (first time) of hydrogen fuel to the first FCV vehicle 200a. The filling of hydrogen fuel is started.

  As the B low pressure bank filling step (S130), the supply unit 106 starts the first unit after the filling interval time t has elapsed from the filling start time T0 (first time) of hydrogen fuel to the first FCV vehicle 200a. While the fuel tank 202a of the FCV vehicle 200a is continuously filled with hydrogen fuel from the pressure accumulator 10, the fuel tank 202b of the second FCV vehicle 200b is further filled from the pressure accumulator 10 using the dispenser 30b. .

  As the B intermediate pressure bank filling step (S132), the supply unit 106 determines when the pressure accumulator 10 reaches a predetermined lower limit pressure (or when the pressure difference between the pressure accumulator 10 and the fuel tank 202b becomes smaller than the threshold value. ), The pressure accumulator for supplying the hydrogen fuel to the dispenser 30b is changed from the pressure accumulator 10 serving as the low pressure bank to the medium pressure bank independently of the filling of the hydrogen fuel into the fuel tank 202a of the first FCV vehicle 200a. Switch to the accumulator 12. Then, the supply unit 106 supplies hydrogen fuel from the pressure accumulator 12 to the fuel tank 202b of the second FCV vehicle 200b using the dispenser 30b.

  As the B high pressure bank filling step (S134), the supply unit 106 determines when the pressure accumulator 12 reaches a predetermined use lower limit pressure (or when the pressure difference between the pressure accumulator 12 and the fuel tank 202b becomes smaller than the threshold). In the case where the filling from the pressure accumulator 12 is not yet completed, the filling of the fuel tank 202b is not completed, but the hydrogen fuel is charged into the dispenser 30b independently of the filling of the hydrogen fuel into the fuel tank 202a of the first FCV vehicle 200a. The accumulator for supplying the fuel is switched from the accumulator 12 serving as an intermediate pressure bank to the accumulator 14 serving as a high pressure bank. The supply unit 106 supplies hydrogen fuel from the pressure accumulator 14 to the fuel tank 202b of the second FCV vehicle 200b using the dispenser 30b.

  Thereby, the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b is completed.

  In addition, after the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b is completed, the decompression process is continued until the pressure in the pressure accumulator 10, 12, 14 returns to the predetermined pressure P0. Needless to say.

  In the example of FIG. 5, as a comparative example, after the second FCV vehicle 200b arrives at the hydrogen station 102, the hydrogen from the multistage accumulator 101 is immediately transferred to the fuel tank 202b of the second FCV vehicle 200b using the dispenser 30b. The case where fuel is supplied is shown. In such a case, the initial filling time of vehicle B (t2-1) is filled into the fuel tank 202b of the second FCV vehicle 200b, but in the middle, the differential pressure required for hydrogen fuel or differential pressure filling is increased. It becomes impossible to obtain this, and there is a time to wait for the multi-stage accumulator 101 to return. After the pressure is restored to such an extent that filling is possible, the filling time for the B car (t2-2) occurs again. As a result, the time at which the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b is completed is a time Δt as compared to the case where the filling interval time t is provided and the filling is started as in the first embodiment. It will be late. It should be noted that after the filling of the hydrogen fuel into the fuel tank 202a of the first FCV vehicle 200a is completed, the fuel tank 202b of the second FCV vehicle 200b is waited until the return to the multistage accumulator 101 is completed. When supplying hydrogen fuel from the multi-stage pressure accumulator 101, it goes without saying that the time for completing the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b is delayed.

  As described above, according to the first embodiment, a delay in charging time of hydrogen fuel to the second FCV vehicle 200b can be achieved without providing a set of supply equipment such as two multistage accumulators and compressors. Can be reduced.

  FIG. 6 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. In FIG. 6, the pressure accumulator 29 is arranged in parallel with the pressure accumulator 10, and the pressure accumulator serving as the low pressure bank (1st bank) to start filling first is configured in two stages, and the discharge side of the compressor 40 is connected to the valve 27. The pressure accumulator 29 is connected by piping to the pressure accumulator 29, the pressure accumulator 29 is connected to the dispenser 30a by piping through the valve 28a, and is connected to the dispenser 30b by piping from the valve 28b, and pressure accumulating Except that the pressure in the vessel 29 is measured by the pressure gauge 17, it is the same as FIG. Thus, when the multistage accumulator 101 is configured using a plurality of stages of accumulators, the volume of the low-pressure bank used first is larger than the accumulators 12 and 14 of the other stages of banks, Alternatively, it is preferable to increase the number of accumulators. Since hydrogen fuel is supplied to the two FCV vehicles 200a and 200b at the same time using the two dispensers 30a and 30b, the reduction speed of the hydrogen fuel is increased. Therefore, the reduction speed of hydrogen fuel can be loosened by arranging a plurality of pressure accumulators used simultaneously. In particular, it is more effective to arrange the accumulators 10 and 29 which are low-pressure banks to be used first in parallel.

  FIG. 7 is another modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. In FIG. 7, two nozzles 31a and 31b are arranged in one dispenser 30a. Then, hydrogen fuel is supplied from the first nozzle 31a to the fuel tank 202a of the first FCV vehicle 200a, and hydrogen fuel is supplied from the second nozzle 31b to the fuel tank 202b of the second FCV vehicle 200b. Supply. Since only one dispenser 30a is provided, the valves 22b, 24b, and 26b are not necessary. Other configurations are the same as those in FIG. In the example of FIG. 7, when the filling interval time t has elapsed from the filling start time T0 of hydrogen fuel to the first FCV vehicle 200a, 2 arrived at the hydrogen station 102 after the first FCV vehicle 200a. The filling of hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b is started. At that time, hydrogen fuel is charged into the two FCV vehicles 200a and 200b simultaneously from the same accumulator (for example, the accumulator 10) in the multistage accumulator 101. Thereby, the dispenser 30a and the cooler 32a can be shared. Needless to say, the FCV information of the second FCV vehicle 200b is communicated via the repeater 34a.

  FIG. 8 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. 8 is the same as FIG. 6 except that the pressure accumulator 10, the valves 21, 22 and the pressure gauge 11 are shared and the pressure accumulator 29 is arranged in parallel. Thus, when the multistage accumulator 101 is configured using a plurality of stages of accumulators, the volume of the low-pressure bank used first is larger than the accumulators 12 and 14 of the other stages of banks, Alternatively, it is preferable to increase the number of accumulators. In such a case, the valves 21 and 22 and the pressure gauge 11 may be shared as shown in FIG.

  FIG. 9 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. In FIG. 9, two nozzles 31a and 31b are arranged in one dispenser 30a. Then, hydrogen fuel is supplied from the first nozzle 31a to the fuel tank 202a of the first FCV vehicle 200a, and hydrogen fuel is supplied from the second nozzle 31b to the fuel tank 202b of the second FCV vehicle 200b. Supply. Since only one dispenser 30a is provided, the valves 22b, 24b, 26b, and 28b are not necessary. Other configurations are the same as those in FIG. When the filling of hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b that arrives at the hydrogen station 102 later than the first FCV vehicle 200a is started, the same accumulator (for example, the accumulator) of the multistage accumulator 101 is used. 10), hydrogen fuel is charged into two FCV vehicles 200a and 200b at the same time. Thereby, the dispenser 30a and the cooler 32a can be shared. Needless to say, the FCV information of the second FCV vehicle 200b is communicated via the repeater 34a. And in the example of FIG. 9, the reduction speed of hydrogen fuel can be loosened by arrange | positioning the accumulator used simultaneously in multiple rows. In particular, it is more effective to arrange the pressure accumulators 10 to be used first as a low pressure bank in parallel. In the example of FIG. 9, the pressure accumulator 29 that is a low-pressure bank is made independent from the pressure accumulator 10 that is the same low-pressure bank, so that hydrogen fuel is supplied to two FCV vehicles 200a and 200b at the same time. Hydrogen fuel can be supplied from the low pressure bank. Therefore, it is possible to control each bank independently when simultaneously using banks in the same pressure zone with the lower limit of use pressure for a plurality of FCV vehicles 200a, 200b. The same applies to the case of FIG.

  In the examples of FIGS. 6, 8, and 9, the case where the pressure accumulator serving as the low-pressure bank has a two-stage configuration of the pressure accumulator 10 and the pressure accumulator 29 is shown, but the present invention is not limited to this. The accumulator serving as the intermediate pressure bank may have a two-stage configuration of the accumulator 12 and the accumulator 29. Or you may make the accumulator used as a high voltage bank into the 2 step | paragraph structure of the accumulator 14 and the accumulator 29. FIG. Alternatively, there may be two banks instead of only one bank.

  FIG. 10 is a modification of the configuration diagram showing the configuration of the hydrogen fuel supply system of the hydrogen station in the first embodiment. In FIG. 10, two nozzles 31a and 31b are arranged in one dispenser 30a. Then, hydrogen fuel is supplied from the first nozzle 31a to the fuel tank 202a of the first FCV vehicle 200a, and hydrogen fuel is supplied from the second nozzle 31b to the fuel tank 202b of the second FCV vehicle 200b. Supply. Since only one dispenser 30a is provided, the valves 22b, 24b, and 26b are not necessary. Other configurations are the same as those in FIG.

Embodiment 2. FIG.
The filling rate α of hydrogen fuel into the first FCV vehicle 200a and the filling rate β of hydrogen fuel into the second FCV vehicle 200b described in the first embodiment are the same (or substantially equal). In principle, it is performed at a similar filling speed. However, in such a case, in the example of FIG. 5, it may occur that the standby time of the second FCV vehicle 200b takes a long time. In such a case, the user of the second FCV vehicle 200b or the employee of the hydrogen station 102 sets the start of filling the second FCV vehicle 200b in the dispenser 30b or the like, but the second FCV vehicle There is a concern that a misunderstanding that a malfunction (failure) of the system has occurred due to the fact that charging to 200b is not started. Therefore, in the second embodiment, the waiting time of the second FCV vehicle 200b is sufficient so that it does not affect the filling time of the first FCV vehicle 200a or can be ignored even if given. A configuration for shortening the length will be described.

  The configuration of the hydrogen fuel supply system of the hydrogen station in the second embodiment is the same as that shown in FIG.

  FIG. 11 is a diagram illustrating an example of an internal configuration of the control circuit according to the second embodiment. 11 is the same as FIG. 2 except that a standby time calculation unit 95, a determination unit 96, a filling interval time recalculation unit 97, and a filling speed calculation unit 98 are added. Reception unit 52, end pressure / temperature calculation unit 54, flow planning unit 56, system control unit 58, return pressure control unit 61 (valve control unit 60, compressor control unit 62), supply control unit 63 (dispenser control unit 64, Valve control unit 65), bank pressure receiving unit 66, filling interval time calculating unit 92, determining unit 94, standby time calculating unit 95, determining unit 96, filling interval time recalculating unit 97, and filling speed calculating unit 98, etc. The “˜unit” includes a processing circuit, and the processing circuit includes an electric circuit, a computer, a processor, a circuit board, or a semiconductor device. In addition, each “˜unit” may use a common processing circuit (the same processing circuit). Alternatively, different processing circuits (separate processing circuits) may be used. Reception unit 52, end pressure / temperature calculation unit 54, flow planning unit 56, system control unit 58, return pressure control unit 61 (valve control unit 60, compressor control unit 62), supply control unit 63 (dispenser control unit 64, Valve control unit 65), bank pressure receiving unit 66, filling interval time calculating unit 92, determining unit 94, standby time calculating unit 95, determining unit 96, filling interval time recalculating unit 97, and filling speed calculating unit 98 are required. Each time the input data or the calculated result is stored in the memory 51 (not shown).

  Moreover, the principal part process of the hydrogen fuel supply method in Embodiment 2 is the same as that of FIG. 4 except the internal process of the filling flow calculation B (S112). The contents other than those described in particular are the same as those in the first embodiment.

  The contents of each process from the FCV information (A) reception process (S102) to the filling interval calculation process (S110) are the same as those in the first embodiment. However, in the filling interval calculation step (S110), the filling interval time calculation unit 92 performs a filling rate α of hydrogen fuel into the first FCV vehicle 200a and a filling rate β of hydrogen fuel into the second FCV vehicle 200b. And the filling interval time t is calculated using the same filling speed β (or α). Other points in the filling interval calculation step (S110) are the same as those in the first embodiment.

  FIG. 12 is a flowchart showing an internal process of the filling flow calculation B in the second embodiment. In FIG. 12, the filling flow calculation B (S112) in the second embodiment includes, as its internal processes, a standby time calculation process (S12), a determination process (S14), and a filling flow calculation B (1) (S16). A series of steps of a filling interval recalculation step (S18), a filling speed β ′ calculation step (S20), and a filling flow calculation B (2) (S22) are performed.

  In the standby time calculation step (S12), the standby time calculation unit 95 calculates a standby time t ′ for waiting for the second FCV vehicle 200b to be charged. Specifically, the standby time calculating unit 95 adds hydrogen fuel to the second FCV vehicle 200b obtained by adding the filling interval time t to the hydrogen fuel filling start time T0 to the first FCV vehicle 200a. The reception time T1 when the receiving unit 52 has received the FCV information (B) of the FCV vehicle 200b from the filling start time T2 (the time when it was confirmed in communication control that the second FCV vehicle 200b has arrived at the hydrogen station). The subtracted waiting time t ′ is calculated.

  As a determination step (S14), the determination unit 96 determines whether the standby time t 'of the second FCV vehicle 200b is longer than a predetermined time (threshold value) Tth. For example, the threshold value Tth is set to 5 to 20 seconds (here, for example, 15 seconds). In the second embodiment, the waiting time from when the second FCV vehicle 200b arrives at the hydrogen station 102 to the start of filling is shortened as much as possible. Alternatively, it is configured to eliminate the waiting time. When the standby time t ′ is not longer than the threshold value Tth, the process proceeds to the determination step (S16). When the standby time t 'is larger than the threshold value Tth, the process proceeds to the filling interval recalculation step (S18).

  As the filling flow calculation B (1) (S16), when the standby time t ′ is not greater than the threshold value Tth, the flow planning unit 56 uses the multi-stage pressure accumulator 101 again as in the first embodiment to use the FCV vehicle 200b. A filling flow plan for supplying (filling) hydrogen fuel with a differential pressure to the fuel tank 202b is created. As described with reference to FIG. 3, the flow planning unit 56 selects the accumulator (selection of the accumulators 10, 12, and 14) for the calculated pressure of the fuel tank 202 to be the final pressure PF, and the multistage accumulator 101. A filling flow plan including the timing of switching is prepared. Since the filling interval time t is obtained this time, it is possible to estimate the pressure change due to the pressure of each of the accumulators 10, 12, and 14 at the filling start time T2 and the return pressure. Therefore, it is preferable that the flow planning unit 56 creates a filling flow plan on the assumption of the pressure state of each of the accumulators 10, 12, and 14 and the pressure change due to the return pressure. The filling flow plan control data created in such a case is temporarily stored in the storage device 82. Note that, similarly to the filling interval calculation step (S110) in the second embodiment, the flow planning unit 56 fills the hydrogen fuel charging speed α into the first FCV vehicle 200a and the hydrogen fuel into the second FCV vehicle 200b. The filling flow plan is calculated using the same filling speed β. Then, the process proceeds to the determination step (S114).

  In the filling interval recalculation step (S18), when the standby time t ′ of the second FCV vehicle 200b is larger than the threshold value Tth, the filling interval time recalculation unit 97 sets the standby time t ′ to the same time as the threshold value Tth. The filling interval time t ″ for becoming is recalculated. Thereby, the newly obtained filling interval time t ″ is smaller (shorter) than the filling interval time t obtained by the filling interval calculation step (S110). Needless to say.

  FIG. 13 is a diagram illustrating an example of a time chart of fuel filling into two FCV vehicles in the second embodiment, the first embodiment, and the comparative example. In FIG. 13, the hydrogen fuel filling start time T0 for the first FCV vehicle 200a and the hydrogen fuel filling start time T0 for the first FCV vehicle 200a to the filling completion time T3 are expressed as time t1 (A Vehicle filling time) and reception time T1 when the receiving unit 52 received the FCV information (B) of the FCV vehicle 200b (time when communication control can confirm that the second FCV vehicle 200b has arrived at the hydrogen station) The hydrogen fuel filling completion time T4 (filling completion time) for the second FCV vehicle 200b is the same as in FIG. On the other hand, in the second embodiment, since the waiting time t ′ is shortened, the filling interval time t ″ is shorter than the filling interval time t of the first embodiment. In the second embodiment, the second FCV vehicle 200b When the filling end time T4 at which the pressure in the fuel tank 202b reaches the final pressure PF is maintained, the filling start time T2 of hydrogen fuel to the second FCV vehicle 200b is advanced to the filling start time T2 ″. The time t2 ″ (B vehicle filling time) from the hydrogen fuel filling start time T2 ″ to the FCV vehicle 200b to the filling completion time T4 can be made longer than in the first embodiment. Therefore, in the second embodiment, when the waiting time t ′ from when the FCV information (B) is received until the fuel tank 202b of the FCV vehicle 200b starts to be filled with hydrogen fuel is larger than the threshold Tth, the filling interval time t is shortened to the filling interval time t ″, and the filling of the hydrogen fuel into the fuel tank 202b of the second FCV vehicle 200b is slower than the filling of the hydrogen fuel into the fuel tank 202a of the first FCV vehicle 200a. (Filling rate β ′).

  As the filling speed β ′ calculation step (S20), the filling speed calculation unit 98 maintains the filling end time T4 at which the pressure of the fuel tank 202b of the second FCV vehicle 200b reaches the final pressure PF, while the FCV vehicle 200a The second unit so that the filling end time T3 when the fuel tank 202a reaches the final pressure PF is not affected (the filling end time is not delayed) or the gas filling to the fuel tank 202a is continued (filling is not disabled). The filling speed β ′ into the fuel tank 202b of the FCV vehicle 200b is calculated. In other words, when the fuel tank 202b of the second FCV vehicle 200b is filled at time t2 ″, the filling amount into the fuel tank 202b (β ′ · t2 ″) and the filling interval calculation step (S110) are calculated. A filling speed β ′ (= β · t2 / t2 ″) that balances (matches) the original filling amount (β · t2) into the fuel tank 202b is calculated. The filling speed β ′ is, for example, β ′ = β・ Calculation is possible with t2 / t2 ″. Further, the filling speed β ′ may be a constant value or a variable value that varies with the passage of time after the start of filling.

  As the filling flow calculation B (2) (S22), the flow planning unit 56 uses the multistage accumulator 101 again to fill the fuel tank 202b of the FCV vehicle 200b with a differential pressure to supply (fill) hydrogen fuel. Create As described with reference to FIG. 3, the flow planning unit 56 selects the accumulator (selection of the accumulators 10, 12, and 14) for the calculated pressure of the fuel tank 202 to be the final pressure PF, and the multistage accumulator 101. A filling flow plan including the timing of switching is prepared. Since the shortened filling interval time t ″ is obtained this time, it is possible to estimate the pressure change due to the pressure of each of the accumulators 10, 12, and 14 at the filling start time T2 ″ and the return pressure. Therefore, it is preferable that the flow planning unit 56 creates a filling flow plan on the assumption of the pressure state of each of the accumulators 10, 12, and 14 and the pressure change due to the return pressure. The filling flow plan control data created in such a case is temporarily stored in the storage device 82. The flow planning unit 56 fills the first FCV vehicle 200a with the hydrogen fuel filling speed as the filling speed β and the second FCV vehicle 200b with the hydrogen fuel filling speed as the filling speed β ′. Calculate the flow plan. Then, the process proceeds to the determination step (S114).

  The contents of each step after the determination step (S114) are the same as those in the first embodiment. Here, as a method of narrowing the filling speed β to the filling speed β ′, it is preferable to adjust the filling flow rate of the hydrogen gas from the dispenser 30 b to the fuel tank 202 b.

  As described above, according to the second embodiment, the filling start time T2 of the second FCV vehicle 200b can be advanced to T2 ″. Therefore, the user of the second FCV vehicle 200b or the hydrogen station 102 Although the employee sets the start of filling the second FCV vehicle 200b to the dispenser 30b or the like, the system malfunctions (failure) due to the fact that the filling of the second FCV vehicle 200b is not started. It is possible to prevent misunderstandings, and to prevent the filling end time of the first FCV vehicle 200a from being affected, or the gas filling of the fuel tank 202a is not interrupted. Can last.

  In the above-described example, the filling speed α of hydrogen fuel into the first FCV vehicle 200a and the filling speed β of hydrogen fuel into the second FCV vehicle 200b are the same filling speed (or substantially the same level). However, the present invention is not limited to this. Even when the filling speed α of hydrogen fuel into the first FCV vehicle 200a and the filling speed β of hydrogen fuel into the second FCV vehicle 200b are different, the second FCV vehicle 200b. When the waiting time becomes longer than the threshold value Tth, the filling speed β may be lowered to a small filling speed β ′. Thereby, the same effect can be exhibited in that the filling start time T2 of the second FCV vehicle 200b can be advanced.

  Moreover, the structure shown in FIGS. 6-10 mentioned above can be used as a modification of the block diagram which shows the structure of the hydrogen fuel supply system of the hydrogen station in Embodiment 2. FIG.

  The embodiments have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, although the case where the multistage pressure accumulator 101 by the three pressure accumulators 10, 12, and 14 was used for the filling of the hydrogen fuel for one FCV vehicle was shown, it does not restrict to this. Depending on the capacity of the pressure accumulators 10, 12, 14 and the like, more pressure accumulators may be used for filling one unit. Or, conversely, two pressure accumulators may be used to fill one car.

  In the above-described example, the case where two dispensers 30 are arranged and the case where one or two nozzles 31 are arranged in one dispenser 30 have been described, but the present invention is not limited to this. The number of dispensers 30 may be three or more. Similarly, the number of nozzles 31 arranged in one dispenser 30 may be three or more. For example, if there are three nozzles 31 (three dispensers 30), the filling interval t when the second FCV vehicle 200b and the third FCV vehicle 200c are started to be filled with hydrogen fuel is as described above. Similarly, calculation may be performed.

  In the above-described example, when two FCV vehicles 200a and 200b are simultaneously filled from the same bank, it is preferable to provide a device (a check valve, valve switching based on flow rate detection, etc.) that prevents hydrogen fuel from flowing backward.

  In addition, although descriptions are omitted for parts and the like that are not directly required for the description of the present invention, such as a device configuration and a control method, a required device configuration and a control method can be appropriately selected and used.

  In addition, all hydrogen fuel supply methods and hydrogen supply systems that include elements of the present invention and that can be appropriately modified by those skilled in the art are included in the scope of the present invention.

10, 12, 14, 29 Pressure accumulator 11, 13, 15, 17 Pressure gauge 21, 22, 23, 24, 25, 26, 27, 28 Valve 30 Dispenser 32 Cooler 34 Repeater 40 Compressor 50 Communication control circuit 51 Memory 52 Receiving unit 54 End pressure / temperature calculating unit 56 Flow planning unit 58 System control unit 60, 65 Valve control unit 62 Compressor control unit 64 Dispenser control unit 66 Bank pressure receiving unit 80, 82, 84 Storage device 92 Filling interval time Calculation unit 94 Determination unit 95 Standby time calculation unit 96 Determination unit 97 Filling interval time recalculation unit 98 Filling speed calculation unit 100 Control circuit 101 Multi-stage pressure accumulator 102 Hydrogen station 104 Return pressure mechanism 106 Supply unit 200 FCV vehicle 202 Fuel tank 204 In-vehicle 302 Cardle 304 Intermediate pressure accumulator 306 Hydrogen trailer 308 Hydrogen production equipment 12,314,316,318 pressure gauge 322, 324, 326, 328 valve 500 hydrogen fuel supply system

Claims (7)

First information on a first hydrogen storage container mounted on the first fuel cell vehicle is received from a first vehicle-mounted device mounted on a first fuel cell vehicle (FCV) powered by hydrogen fuel. And a process of
Of the first and second dispensers commonly connected to a multistage accumulator in which hydrogen fuel is accumulated, hydrogen fuel is supplied from the multistage accumulator to the first hydrogen storage container using the first dispenser. Filling, and
It is mounted on a second fuel cell vehicle (FCV) that uses hydrogen fuel as a power source after the start of reception of the first information and before the filling of hydrogen fuel into the first hydrogen storage container is completed. Receiving second information relating to the second hydrogen storage container mounted on the second fuel cell vehicle from the second vehicle-mounted device;
Using the first and second information, the first hydrogen from the multistage accumulator does not generate a period during which hydrogen fuel cannot be charged in the middle of filling the second hydrogen storage container from the multistage accumulator. A step of calculating a filling interval time from the start of filling hydrogen fuel into the storage container to the start of filling hydrogen fuel into the second hydrogen storage container from the multistage accumulator;
Filling the second hydrogen storage container with the hydrogen fuel from the multistage pressure accumulator after the filling interval time has elapsed from the time when the first hydrogen storage container has started filling with the hydrogen fuel from the multistage pressure accumulator. When,
A method for supplying hydrogen fuel, comprising: The multistage accumulator is decompressed by a compressor,
The hydrogen fuel supply method according to claim 1, wherein the filling interval time is calculated using a hydrogen supply amount supplied from the compressor to the multistage accumulator by a return pressure by the compressor.   The filling interval time includes the pressure of the first hydrogen storage container, the pressure of the second hydrogen storage container, the outside air temperature or the temperature of the first and second hydrogen storage containers, the first and second The hydrogen fuel supply method according to claim 1, wherein the calculation is performed using the volume of the hydrogen storage container.   The method of supplying hydrogen fuel according to any one of claims 1 to 3, wherein the filling interval time is calculated using each pressure, temperature, and volume of a plurality of pressure accumulators constituting the multistage pressure accumulator. .   When the multistage accumulator is configured using a plurality of stages of accumulators, the volume of the low-pressure bank used first is larger than the accumulators of other banks, or the number of accumulators is large. The method for supplying hydrogen fuel according to any one of claims 1 to 3. A multistage accumulator in which hydrogen fuel is accumulated;
First and second dispensers for supplying the hydrogen fuel, commonly connected to the multistage accumulator;
A first hydrogen storage container mounted on the first fuel cell vehicle from a first onboard device mounted on a first fuel cell vehicle (FCV) powered by hydrogen fuel arriving at the hydrogen station. From the second vehicle-mounted device mounted on the second fuel cell vehicle (FCV) that receives the hydrogen fuel arriving at the hydrogen station later than the first fuel cell vehicle A receiving unit for receiving second information relating to a second hydrogen storage container mounted on the second fuel cell vehicle;
Using the first and second information, the first hydrogen from the multistage accumulator does not generate a period during which hydrogen fuel cannot be charged in the middle of filling the second hydrogen storage container from the multistage accumulator. A filling interval time calculation unit for calculating a filling interval time from the start of filling hydrogen fuel into the storage container to the start of filling hydrogen fuel into the second hydrogen storage container from the multistage accumulator;
With
When filling the first hydrogen storage container using the first dispenser, and when the filling interval time has elapsed from the start of filling hydrogen fuel into the first hydrogen storage container from the multistage accumulator, A hydrogen supply system, wherein the second hydrogen storage container is filled in parallel using the second dispenser.   In the filling interval time, when the waiting time from when the second information is received until the second hydrogen storage container starts to be filled with hydrogen fuel is longer than a threshold, the filling interval time is shortened. 6. The filling of hydrogen fuel into the second hydrogen storage container is performed at a lower speed than filling of the hydrogen fuel into the first hydrogen storage container. Supply method.

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