JP2015197190A - Hydrogen gas charging facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen gas charging facility capable of accurately measuring a hydrogen gas charging amount actually charged to a charged container such as the fuel tank of a fuel cell vehicle.SOLUTION: A hydrogen gas charging facility 1 includes: a hydrogen supply line 7 that supplies high-pressure hydrogen gas to a charging nozzle 4; a hydrogen discharge line 8 that is branched from the hydrogen supply line 7, and has a discharge valve 14 for discharging high-pressure hydrogen gas; a first gas flowmeter 12 that is provided in the portion of the hydrogen supply line 7 positioned on an upstream side in a hydrogen gas supply direction with respect to the branch position of the hydrogen discharge line 8; and a second gas flowmeter 15 that is provided in the hydrogen discharge line 8.

Description

  The present invention relates to a hydrogen gas filling facility for filling a filled container such as an in-vehicle fuel tank (hereinafter simply referred to as “fuel tank”) of a fuel cell vehicle (FCV).

  In recent years, development of fuel cell vehicles has been promoted from the viewpoint of environmental conservation. A fuel cell vehicle is equipped with a fuel tank for storing hydrogen gas as fuel. Fuel supply to the fuel tank, that is, filling of the fuel tank with hydrogen gas is usually performed by a hydrogen gas filling facility such as a hydrogen station (see, for example, Patent Document 1).

Here, a conventional hydrogen gas filling facility will be described.
FIG. 7 shows a schematic configuration of an example of a conventional hydrogen gas filling facility. As shown in FIG. 7, a conventional hydrogen gas filling facility 50 includes a pressure accumulator 51 that stores high-pressure hydrogen gas, a filling nozzle 52 that is connected to a fuel tank 71 of a fuel cell automobile 70, and an opening / closing valve 53 at one end. And a hydrogen supply line 55 having the other end connected to the filling nozzle 52 via a filling hose 54 and a hydrogen discharge line 56 branched from the hydrogen supply line 55. In the hydrogen supply line 55, a flow control valve 57, a shut-off valve 58, a gas flow meter 59, and a precool device 60 are arranged. The hydrogen release line 56 branches from between the gas flow meter 59 of the hydrogen supply line 55 and the precooling device 60, and the hydrogen release line 56 is provided with a release valve 61.

  In the conventional hydrogen gas filling facility 50, the filling of the hydrogen gas into the fuel tank 71 of the fuel cell vehicle 70 is performed as follows. First, the filling nozzle 52 is connected to the fuel tank 71, and then the on-off valve 53 and the shutoff valve 58 are opened. As a result, the high-pressure hydrogen gas in the pressure accumulator 51 is filled into the fuel tank 71 via the hydrogen supply line 55, the filling hose 54, and the filling nozzle 52. Thereafter, when the pressure in the fuel tank 71 reaches a predetermined pressure, the filling of the hydrogen gas into the fuel tank 71 is completed.

JP 2012-237437 A

When the filling of the hydrogen gas into the fuel tank 71 is completed, the high-pressure hydrogen gas that has not been filled into the fuel tank 71 out of the high-pressure hydrogen gas that has passed through the gas flow meter 59 enters the hydrogen supply line 55 or the filling hose 54. Will remain. The remaining high-pressure hydrogen gas is discharged through a hydrogen discharge line 56 before removing the filling nozzle 52 from the fuel tank 71 for safety. That is, not all the high-pressure hydrogen gas that has passed through the gas flow meter 59 is filled in the fuel tank 71.
For this reason, the conventional hydrogen gas filling facility 50 has a problem that the amount of high-pressure hydrogen gas actually filled in the fuel tank 71 (hydrogen gas filling amount) cannot be accurately measured.

  Accordingly, an object of the present invention is to provide a hydrogen gas filling facility capable of accurately measuring and grasping a hydrogen gas filling amount actually filled in a filled container such as a fuel tank of a fuel cell vehicle.

  According to one aspect of the present invention, a hydrogen gas filling facility for filling a filled container with hydrogen gas via a filling nozzle includes a hydrogen supply line for supplying high-pressure hydrogen gas to the filling nozzle, and the hydrogen supply line. A hydrogen release line that is branched and has a release valve for releasing high-pressure hydrogen gas, and a portion of the hydrogen supply line that is located upstream of the branch position of the hydrogen release line in the hydrogen gas supply direction. A first gas flow meter, and a second gas flow meter provided in the filling nozzle or the hydrogen discharge line.

  According to another aspect of the present invention, in a hydrogen gas filling facility for filling a filled container with hydrogen gas via a filling nozzle, the filling nozzle is provided with a gas flow meter.

  The hydrogen gas filling facility includes a first gas flow meter provided in a hydrogen supply line and a second gas flow meter provided in the hydrogen discharge line or the filling nozzle. Therefore, based on the measured values of these gas flow meters, the hydrogen gas filling amount actually filled in the filled container and the hydrogen gas releasing amount released through the hydrogen gas releasing line are accurately measured and grasped. be able to.

  According to the hydrogen gas filling facility, since the gas flow meter is provided in the filling nozzle, it is possible to accurately measure and grasp the hydrogen gas filling amount actually filled in the filled container.

It is a figure which shows schematic structure of the hydrogen gas filling equipment by 1st Embodiment of this invention. It is a flowchart which shows the content of the process at the time of filling a to-be-filled container with hydrogen gas in the hydrogen gas filling equipment by said 1st Embodiment. It is a figure which shows schematic structure of the hydrogen gas filling equipment by 2nd Embodiment of this invention. It is a flowchart which shows the content of the process at the time of filling a to-be-filled container with hydrogen gas in the hydrogen gas filling equipment by the said 2nd Embodiment. It is a figure which shows schematic structure of the hydrogen gas filling equipment by 3rd Embodiment of this invention. It is a flowchart which shows the content of the process at the time of filling a to-be-filled container with hydrogen gas in the hydrogen gas filling equipment by the said 3rd Embodiment. It is a figure which shows schematic structure of an example of the conventional hydrogen gas filling equipment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
Here, a case where the hydrogen gas filling facility fills a fuel tank of a fuel cell vehicle (FCV) with hydrogen gas, that is, a case where the hydrogen gas filling facility is a so-called hydrogen station will be described. However, the present invention is not limited to this, and the same applies to hydrogen gas filling equipment for filling high-pressure hydrogen gas into a filling container other than a fuel tank of a fuel cell vehicle.

[First Embodiment]
FIG. 1 shows a schematic configuration of a hydrogen gas filling facility according to a first embodiment of the present invention.
The hydrogen gas filling facility 1 according to the first embodiment is a facility for filling the fuel tank 21 of the fuel cell vehicle 20 with hydrogen gas. As shown in FIG. 1, a hydrogen gas filling facility 1 includes a compressor 2, a pressure accumulator 3, a filling nozzle 4 that is detachably connected to a fuel tank 21 via a receptacle (not shown), and an opening / closing valve at one end. A hydrogen supply line 7 connected to the compressor 2 via 5 and having the other end connected to the filling nozzle 4 via a filling hose 6, and a hydrogen release line 8 branched from the middle of the hydrogen supply line 7. Have. Here, the receptacle incorporates, for example, a check valve, and the backflow of hydrogen gas from the fuel tank 21 is prevented.

  The compressor 2 compresses hydrogen supplied from a hydrogen supply device (not shown) or the like into high-pressure hydrogen gas. The compressor 2 supplies the high-pressure hydrogen gas to the hydrogen supply line 7 by opening the on-off valve 5 during its operation. The pressure accumulator 3 is connected to the hydrogen supply line 7 via the on-off valve 9. The pressure accumulator 3 stores high-pressure hydrogen gas, and supplies the high-pressure hydrogen gas to the hydrogen supply line 7 by opening the on-off valve 9. That is, in this embodiment, the hydrogen gas (high-pressure hydrogen gas) compressed by the compressor 2 and / or the high-pressure hydrogen gas stored in the pressure accumulator 3 is configured to be supplied to the hydrogen supply line 7. . However, the present invention is not limited to this, and hydrogen gas (high-pressure hydrogen gas) compressed by the compressor 2 is stored in the accumulator 3, and only the high-pressure hydrogen gas stored in the accumulator 3 is supplied to the hydrogen supply line 7. You may make it do. Further, the pressure accumulator 3 may be transported from another place.

  The hydrogen supply line 7 is a flow path for supplying high-pressure hydrogen gas from the compressor 2 and / or the pressure accumulator 3 to the filling nozzle 4. In the hydrogen supply line 7, a flow rate adjustment valve 10, a shutoff valve 11, a first gas flow meter 12, and a precool device 13 are arranged in order from the upstream side in the high-pressure hydrogen gas supply direction (hydrogen gas supply direction). . The hydrogen release line 8 is a flow path for releasing hydrogen gas to the outside, and branches off from a portion of the hydrogen supply line 7 located between the first gas flow meter 12 and the precool device 13. The hydrogen release line 8 is provided with a release valve 14 and a second gas flow meter 15. The second gas flow meter 15 is disposed downstream of the release valve 14 in the hydrogen gas discharge direction.

  The flow rate adjusting valve 10 is a valve that adjusts the flow rate of the high-pressure hydrogen gas flowing through the hydrogen supply line 7, in other words, the flow rate of the high-pressure hydrogen gas supplied to the filling nozzle 4 according to the opening degree. The shutoff valve 11 is a valve that shuts off the flow of hydrogen gas in the hydrogen supply line 7. The shut-off valve 11 is closed at least when hydrogen gas is discharged from the hydrogen discharge line 8 to the outside. The first gas flow meter 12 is not particularly limited as long as it can measure the flow rate of hydrogen gas in the hydrogen supply line 7. For example, a Coriolis flow meter or an ultrasonic flow meter can be used. The precooling device 13 is a device that cools the high-pressure hydrogen gas in order to prevent an excessive increase in the temperature in the fuel tank 21 during hydrogen gas filling. The release valve 14 is a valve for releasing hydrogen gas (high-pressure hydrogen gas), and is opened when the hydrogen gas is released to the outside via the hydrogen release line 8. The second gas flow meter 15 only needs to be capable of measuring the flow rate of hydrogen gas in the hydrogen release line 8. For example, a Coriolis flow meter or an ultrasonic flow meter can be used as in the first gas flow meter 12.

  In the present embodiment, the operation of the compressor 2 and the operations of various valves (open / close valve 5, open / close valve 9, flow rate adjustment valve 10, shutoff valve 11, and release valve 14) are controlled by the control unit 16. In addition, the outputs (measured values) of the first gas flow meter 12 and the second gas flow meter 15 are input to the control unit 16, and the control unit 16 includes the first gas flow meter 12 and the second gas flow meter 12. A predetermined hydrogen gas amount is calculated based on the output of the two-gas flow meter 15.

Next, with reference to FIG. 2, the content of the process performed when the hydrogen gas filling equipment 1 fills the fuel tank 21 of the fuel cell vehicle 20 with hydrogen gas will be described.
First, an operator or the like connects the filling nozzle 4 to the fuel tank 21 of the fuel vehicle 20 (step S1). Next, based on an input instruction from the operator or the like, the control unit 16 opens the on-off valve 5 and / or the on-off valve 9 and opens the shut-off valve 11 (step S2). As a result, the high-pressure hydrogen gas from the compressor 2 and / or the pressure accumulator 3 is caused by the pressure difference between the compressor 2 and the fuel tank 21 and / or the pressure difference between the pressure accumulator 3 and the fuel tank 21. The fuel tank 21 is filled via the high-pressure filling nozzle 4. That is, filling of the high-pressure hydrogen gas into the fuel tank 21 is started.

  During the filling of the high-pressure hydrogen gas into the fuel tank 21, the control unit 16 appropriately adjusts the opening degree of the flow control valve 10 based on the output of the first gas flow meter 12 and supplies the high-pressure hydrogen supplied to the filling nozzle 4. A gas amount (hydrogen gas supply amount) MS is calculated (step S3).

  Then, when the pressure in the fuel tank 21 rises to the filling completion pressure of the fuel tank 21, the filling of the high-pressure hydrogen gas into the fuel tank 21 is finished (step S4). When the filling of the high-pressure hydrogen gas into the fuel tank 21 is completed, the control unit 16 performs a depressurization process to depressurize the upstream side of the filling nozzle 4 in the hydrogen gas supply direction. This is mainly for ensuring safety when the filling nozzle 4 is removed from the fuel tank 21. Specifically, the controller 16 performs the depressurization process by closing the shutoff valve 11 and then opening the release valve 14 (steps S5 and S6).

  When the pressure in the fuel tank 21 rises to the filling completion pressure, the high-pressure hydrogen gas cannot be filled in the fuel tank 21, so that the flow of the high-pressure hydrogen gas in the hydrogen supply line 7 is stopped or almost stopped. Therefore, the control unit 16 can determine whether or not the pressure in the fuel tank 21 has increased to the filling completion pressure based on the output of the first gas flow meter 12, for example. However, the present invention is not limited to this, and the control unit 16 determines whether or not the filling pressure has increased to the filling completion pressure by another method, such as receiving a signal indicating that the filling of hydrogen gas is completed from the fuel cell vehicle 20 side. You may judge.

  Further, when the high-pressure hydrogen gas is completely charged into the fuel tank 21, the increased pressure in the fuel tank 21 is equal to the upstream pressure of the filling nozzle 4 in the high-pressure hydrogen gas supply direction. That is, high-pressure hydrogen gas stays in the filling hose 6 and the hydrogen supply line 7. Therefore, for safety, the control unit 16 discharges the high-pressure hydrogen gas staying between the shut-off valve 11 and the filling nozzle 4 to the outside, and thereby depressurizes the upstream side of the filling nozzle 4 in the hydrogen gas supply direction. (Depressurization process).

  During the depressurization process, the control unit 16 calculates the amount of high-pressure hydrogen gas (hydrogen gas release amount) MR released from the hydrogen release line 8 based on the output of the second gas flow meter 15 (step S7). ). Further, the control unit 16 determines the amount of high-pressure hydrogen gas that has accumulated between the shutoff valve 11 and the first gas flowmeter 12 based on the output of the first gas flowmeter 12 (hydrogen gas retention between the shutoff valve and the flowmeter). (Quantity) mr is calculated (step S8).

  Thereafter, when the controller 16 determines that the accumulated high-pressure hydrogen gas has been sufficiently discharged, the controller 16 closes the discharge valve 14 when, for example, a predetermined time has elapsed from the start of the depressurization process (step S9). Further, the control unit 16 determines the high-pressure hydrogen charged in the fuel tank 21 of the fuel cell vehicle 20 based on the hydrogen gas supply amount MS, the hydrogen gas discharge amount MR, and the hydrogen gas retention amount mr between the shutoff valve and the flow meter. A gas amount (hydrogen gas filling amount) MF is calculated (step S10). Specifically, the control unit 16 calculates the hydrogen gas filling amount MF based on the formula “MF = MS− (MR−mr)”.

  Finally, the operator or the like removes the filling nozzle 4 from the fuel tank 21 of the fuel vehicle 20. That is, the connection between the filling nozzle 4 and the fuel tank 21 is released (step S11). The on-off valve 5 and / or on-off valve 9 opened in step S2 is closed by the control unit 16 at a predetermined timing after the shutoff valve 11 is closed in step S5.

  The hydrogen gas filling facility 1 according to the present embodiment includes a first gas flow meter 12 provided at a site of the hydrogen supply line 7 located upstream of the branch position of the hydrogen release line 8 in the high-pressure hydrogen gas supply direction, And a second gas flow meter 15 provided in the hydrogen release line 8. For this reason, in the hydrogen gas filling facility 1, the high-pressure hydrogen gas amount MS supplied to the filling nozzle 4 when the high-pressure hydrogen gas is filled into the fuel tank 21, and the high pressure released before the filling nozzle 4 is removed from the fuel tank 21. Measurement of the hydrogen gas amount MR is possible. Further, among the released high-pressure hydrogen gas amount MR, the high-pressure hydrogen gas amount mr retained between the shut-off valve 11 and the first gas flow meter 12, that is, the first time when the fuel tank 21 is filled with high-pressure hydrogen gas. It is also possible to measure the amount of high-pressure hydrogen gas that has not passed through the gas flow meter 12. Accordingly, not only the high-pressure hydrogen gas (hydrogen gas discharge amount) amount MR released to the outside by the depressurization process but also the high-pressure hydrogen gas amount (hydrogen gas charge amount) MF actually filled in the fuel tank 21 is accurately determined. It is possible to measure and grasp.

  In the hydrogen gas filling facility 1 according to the present embodiment, the “hydrogen gas retention amount mr between the shutoff valve and the flow meter” is used to calculate the hydrogen gas filling amount MF. However, this may be omitted, and the hydrogen gas filling amount MF may be calculated simply as “MF = MS−MR”. Normally, the first gas flow meter 12 is disposed near the shutoff valve 11, and the amount of high-pressure hydrogen gas retained between the shutoff valve 11 and the first gas flowmeter 12 is high-pressure hydrogen gas retained in other portions. This is because it is much smaller than the amount. Further, the arrangement of the shut-off valve 11 and the first gas flow meter 12 is reversed, that is, the shut-off valve 11 is located at the hydrogen supply line 7 located between the first gas flow meter 12 and the branch position of the hydrogen release line 8. It may be provided.

[Second Embodiment]
Next, a hydrogen gas filling facility according to a second embodiment of the present invention will be described.
In the hydrogen gas filling facility according to the second embodiment, the same reference numerals are used for the components common to the hydrogen gas filling facility 1 according to the first embodiment, and the functions thereof are also the same.

FIG. 3 shows a schematic configuration of a hydrogen gas filling facility according to the second embodiment of the present invention.
The hydrogen filling facility 30 according to the second embodiment is such that the arrangement of the shut-off valve 11 and the first gas flow meter 12 is reversed, and the hydrogen supply line 7 located downstream of the precooling device 13 in the hydrogen gas supply direction. The point where the second shut-off valve 31 is disposed at the site, and the hydrogen discharge line 8 is located between the second shut-off valve 31 and the other end of the hydrogen supply line 7 (the connection end with the filling hose 6). It differs from the hydrogen gas filling equipment 1 according to the first embodiment in that it branches off from the hydrogen supply line 7. Other than that, it is the same as the hydrogen gas filling equipment 1 according to the first embodiment. Note that the second cutoff valve 31 is also controlled by the control unit 16 in the same manner as other valves.

  FIG. 4 is a flowchart showing the contents of processing when the hydrogen gas filling facility 30 according to the second embodiment fills the fuel tank 21 of the fuel cell vehicle 20 with hydrogen gas.

  First, an operator or the like connects the filling nozzle 4 to the fuel tank 21 of the fuel vehicle 20 (step S21), and then the control unit 16 controls the on-off valve 5 and / or on-off valve 9 based on an input instruction from the operator or the like. While opening, the cutoff valve 11 and the 2nd cutoff valve 31 are opened (step S22). As a result, the high-pressure hydrogen gas is filled into the fuel tank 21 via the hydrogen supply line 7 and the filling nozzle 4. During filling of the high-pressure hydrogen gas into the fuel tank 21, the control unit 16 adjusts the opening degree of the flow control valve 10 based on the output of the first gas flow meter 12 and supplies the high pressure supplied to the filling nozzle 4. A hydrogen gas amount (hydrogen gas supply amount) MS is calculated (step S23).

  Then, when the pressure in the fuel tank 21 rises to the filling completion pressure of the fuel tank 21, the filling of the high-pressure hydrogen gas into the fuel tank 21 is finished (step S24), and the control unit 16 performs the depressurization process. . That is, the control unit 16 closes the cutoff valve 11 and the second cutoff valve 31 in this order (step S25), and then opens the release valve 14 (step S26).

  During the execution of the depressurization process, the control unit 16 calculates the amount of high-pressure hydrogen gas (hydrogen gas release amount) MR released from the hydrogen release line 8 based on the output of the second gas flow meter 15 (step S27). ).

  Thereafter, when the controller 16 determines that the accumulated high-pressure hydrogen gas has been sufficiently discharged, the controller 16 closes the discharge valve 14 when, for example, a predetermined time has elapsed from the start of the depressurization process (step S28). Further, the control unit 16 calculates the amount of high-pressure hydrogen gas (hydrogen gas filling amount) MF filled in the fuel tank 21 of the fuel cell vehicle 20 based on the hydrogen gas supply amount MS and the hydrogen gas discharge amount MR ( Step S29). Specifically, the control unit 16 calculates the hydrogen gas filling amount MF based on the formula “MF = MS−MR”.

  Finally, the operator or the like removes the filling nozzle 4 from the fuel tank 21 of the fuel vehicle 20 (step S30). The on-off valve 5 and / or on-off valve 9 opened in step S22 is closed by the control unit 16 at a predetermined timing after the shutoff valve 11 is closed in step S25.

  Also in the hydrogen gas filling facility 30 according to the present embodiment, as with the hydrogen gas filling facility 1 according to the first embodiment, the high-pressure hydrogen gas amount (hydrogen gas filling amount) MF charged in the fuel tank 21 and the depressurization process are externally applied. It is possible to accurately measure and grasp the high-pressure hydrogen gas (hydrogen gas release amount) amount MR released in Further, it can be said that the hydrogen gas filling facility 30 according to the present embodiment is advantageous in that the hydrogen gas discharge amount MR accompanying the depressurization process can be suppressed as compared with the hydrogen gas filling facility 1 according to the first embodiment. The arrangement of the shutoff valve 11 and the first gas flow meter 12 may be the same as that of the hydrogen gas filling equipment 1 according to the first embodiment.

[Third Embodiment]
Next, a hydrogen gas filling facility according to a third embodiment of the present invention will be described.
In the hydrogen gas filling equipment according to the third embodiment, the same reference numerals are used for the components common to the hydrogen gas filling equipment 1 according to the first embodiment, and the functions thereof are also the same.

FIG. 5 shows a schematic configuration of a hydrogen gas filling facility according to the third embodiment of the present invention.
The hydrogen gas filling equipment 40 according to the third embodiment is different from the hydrogen gas filling equipment 1 according to the first embodiment in that the second gas flow meter 15 is disposed in the filling nozzle 4, and the other points are the same. This is the same as the hydrogen gas filling equipment 1 according to the first embodiment. That is, in the hydrogen gas filling facility 40 according to the third embodiment, the second gas flow meter 15 is disposed (for example, built in) in the filling nozzle 4 instead of the hydrogen discharge line 8.

FIG. 6 is a flowchart showing the contents of processing when the hydrogen gas filling facility 40 according to the third embodiment fills the fuel tank 21 of the fuel cell vehicle 20 with hydrogen gas.
The processing of steps S31 to S32 is the same as the processing of steps S1 to S2 in FIG. That is, the filling nozzle 4 is connected to the fuel tank 21, the on-off valve 5 and / or the on-off valve 9 is opened, and the shutoff valve 11 is opened, so that high-pressure hydrogen gas passes through the hydrogen supply line 7 and the filling nozzle 4. The fuel tank 21 is filled.

  During the filling of the high-pressure hydrogen gas into the fuel tank 21, the control unit 16 adjusts the opening degree of the flow control valve 10 based on the output of the first gas flow meter 12 and supplies the high-pressure hydrogen gas supplied to the filling nozzle 4. The amount (hydrogen gas supply amount) MS is calculated (step S33). Further, the control unit 16 calculates the high-pressure hydrogen gas amount (hydrogen gas filling amount) MF filled in the fuel tank 21 based on the output of the second gas flow meter 15 (step S34).

  Then, when the pressure in the fuel tank 21 rises to the filling completion pressure of the fuel tank 21, the filling of the high-pressure hydrogen gas into the fuel tank 21 is finished (step S35), and the control unit 16 performs the depressurization process. . That is, the control unit 16 closes the shutoff valve 11 (step S36), and then opens the release valve 14 (step S37).

  During the execution of the depressurization process, the control unit 16, based on the output of the first gas flow meter 12, the amount of high-pressure hydrogen gas remaining between the shut-off valve 11 and the first gas flow meter 12 (shut-off valve-flow rate). The hydrogen gas retention amount mr between the meters is calculated (step S38).

  Thereafter, when the controller 16 determines that the accumulated high-pressure hydrogen gas has been sufficiently released, the controller 16 closes the release valve 14 (step S39). Then, the control unit 16 determines the amount of high-pressure hydrogen gas (hydrogen) released from the hydrogen release line 8 based on the hydrogen gas supply amount MS, the hydrogen gas filling amount MF, and the hydrogen gas retention amount mr between the shutoff valve and the flow meter. (Gas release amount) MR is calculated (step 40). Specifically, the control unit 16 calculates the hydrogen gas release amount MR based on the formula “MR = (MS−MF) + mr)”.

  Finally, the operator or the like removes the filling nozzle 4 from the fuel tank 21 of the fuel vehicle 20 (step S41). The on-off valve 5 and / or on-off valve 9 opened in step S32 is closed by the control unit 16 at a predetermined timing after the shutoff valve 11 is closed in step S36.

  The hydrogen gas filling facility 40 according to the present embodiment includes a first gas flow meter 12 provided at a site of the hydrogen supply line 7 located upstream of the branch position of the hydrogen release line 8 in the supply direction of high-pressure hydrogen gas, And a second gas flow meter 15 provided in the filling nozzle 4. For this reason, in the hydrogen gas filling facility 40, the high-pressure hydrogen gas amount MS supplied to the filling nozzle 4 when the fuel tank 21 is filled with the high-pressure hydrogen gas and the high-pressure hydrogen gas amount MF filled in the fuel tank 21 are measured. Further, it is possible to measure the amount of high-pressure hydrogen gas mr retained between the shutoff valve 11 and the first gas flow meter 12 during the depressurization process. Accordingly, not only the high-pressure hydrogen gas amount (hydrogen gas filling amount) MF filled in the fuel tank 21 but also the high-pressure hydrogen gas (hydrogen gas discharge amount) amount MR released to the outside by the depressurization process is accurately measured. It is possible to grasp.

  In the hydrogen gas filling equipment 40 according to the present embodiment, the hydrogen gas retention amount mr between the shutoff valve and the flow meter is used to calculate the hydrogen gas discharge amount MR, but this is omitted as in the first embodiment. However, the hydrogen gas release amount MR may be calculated simply as “MR = MS−MF”. Further, the arrangement of the shutoff valve 11 and the first gas flow meter 12 may be reversed.

  As described above, in the hydrogen gas filling equipment 1, 30, 40 according to the above-described embodiment, the control unit 16 controls the fuel tank 21 based on the outputs of the first gas flow meter 12 and the second gas flow meter 15. The amount of filled high-pressure hydrogen gas (hydrogen gas filling amount) MF and the amount of high-pressure hydrogen gas (hydrogen gas release amount) MR released to the outside by the depressurization process are calculated. Therefore, the hydrogen gas filling amount for each fuel cell vehicle can be accurately grasped, and for example, whether or not the accumulator needs to be filled with hydrogen gas or whether or not the accumulator needs to be refilled (replaced) can be easily determined. it can. For this reason, it becomes possible to manage the amount of hydrogen gas in the hydrogen gas filling facilities 1, 30, and 40 in more detail.

  In each of the above-described embodiments, both the amount of high-pressure hydrogen gas filled in the fuel tank 21 and the high-pressure hydrogen gas released to the outside by the depressurization process are accurately grasped. However, the present invention is not limited to this, and the hydrogen gas filling facility may be configured to accurately grasp the amount of high-pressure hydrogen gas charged in the fuel tank 21 mainly. For example, in the hydrogen gas filling facility 40 in the third embodiment, the first gas flow meter 12 may be omitted. In this case, the control part 16 can be comprised so that the opening degree of the flow regulating valve 10 may be adjusted according to a predetermined procedure. Also in the hydrogen gas filling facility 30 in the second embodiment, the second gas flow meter 15 is disposed not in the hydrogen discharge line 8 but in the filling nozzle 4, or the second gas flow meter 15 is disposed in the filling nozzle 4. The first gas flow meter 12 may be omitted.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, A various improvement and change are possible within the range of the invention described in the claim. It is natural.

  DESCRIPTION OF SYMBOLS 1,30,40 ... Hydrogen gas filling equipment, 2 ... Compressor, 3 ... Accumulator, 4 ... Filling nozzle, 7 ... Hydrogen supply line, 8 ... Hydrogen discharge line, 10 ... Flow control valve, 11 ... Shut-off valve, 12 DESCRIPTION OF SYMBOLS 1st gas flow meter, 14 ... Release valve, 15 ... 2nd gas flow meter, 16 ... Control part (hydrogen gas amount calculation part), 20 ... Fuel cell vehicle, 21 ... Fuel tank, 31 ... 2nd cutoff valve

Claims (8)

A hydrogen gas filling facility for filling a container to be filled with hydrogen gas via a filling nozzle,
A hydrogen supply line for supplying high-pressure hydrogen gas to the filling nozzle;
A hydrogen release line branched from the hydrogen supply line and provided with a release valve for releasing high-pressure hydrogen gas;
A first gas flow meter provided at a portion of the hydrogen supply line located upstream in the hydrogen gas supply direction from a branch position of the hydrogen release line;
A second gas flow meter provided in the filling nozzle or the hydrogen discharge line;
A hydrogen gas filling facility.   2. The hydrogen gas filling facility according to claim 1, wherein the second gas flow meter provided in the hydrogen release line is disposed downstream of the release valve in the hydrogen gas release direction. The hydrogen supply line is provided with a precooling device for cooling the high-pressure hydrogen gas,
3. The hydrogen gas filling facility according to claim 1, wherein the hydrogen release line branches off from a portion of the hydrogen supply line located downstream of the precooling device in the hydrogen gas supply direction.   The shutoff valve which interrupts | blocks the distribution | circulation of a high pressure hydrogen gas is arrange | positioned in the site | part of the said hydrogen supply line located in the upstream in a hydrogen gas supply direction rather than the branch position of the said hydrogen discharge line. The hydrogen gas filling equipment according to any one of the above.   5. The hydrogen gas filling facility according to claim 4, wherein the shut-off valve is disposed downstream of the first gas flow meter in the hydrogen gas supply direction.   5. The hydrogen gas filling facility according to claim 4, wherein the shut-off valve is disposed upstream of the first gas flow meter in the hydrogen gas supply direction.   Hydrogen for calculating the hydrogen gas filling amount filled in the filled container and the hydrogen gas releasing amount released from the hydrogen release line based on the output of the first gas flow meter and the output of the second gas flow meter The hydrogen gas filling equipment according to any one of claims 1 to 6, further comprising an amount calculation unit. In a hydrogen gas filling facility that fills a container to be filled with hydrogen gas via a filling nozzle,
Hydrogen gas filling equipment, wherein a gas flow meter is provided in the filling nozzle.