JP6196659B2 - Hydrogen gas filling system and hydrogen gas filling method - Google Patents

Description

  The present invention relates to a fuel gas filling technique.

  2. Description of the Related Art Conventionally, a fuel gas filling device for filling hydrogen gas, which is fuel, into FCV (Fuel Cell Vehicle) at a high pressure is known (for example, see Patent Document 1). The fuel gas filling device described in Patent Document 1 mainly includes a control valve and a pressure accumulator, determines a target flow rate according to the pressure difference between the pressure accumulator and the fuel tank, and discharge flow rate according to the determined target flow rate. Be controlled.

  By the way, in recent years, with the aim of forming the FCV market in 2015, the development of standards and standards has been promoted. In particular, the establishment of a filling protocol that prescribes a safe and efficient rapid filling procedure is regarded as an important issue in a hydrogen station that is a facility for filling and supplying hydrogen as a power source of FCV. The filling protocol is a protocol that presents conditions for safely and efficiently filling hydrogen gas, which is a fuel, into an on-vehicle high-pressure hydrogen container (hereinafter referred to as “on-vehicle tank”) of FCV. Since hydrogen gas has a particularly wide explosion range among combustible gases, it is necessary to perform filling in accordance with this filling protocol with high accuracy in order to carry out rapid filling safely. In that case, it is necessary to stop filling to avoid danger. When filling hydrogen gas from the hydrogen station to the FCV according to the filling protocol, a target pressure increase rate (hereinafter referred to as “target pressure increase rate”) is calculated, and the flow rate of the hydrogen gas is adjusted so as to follow this value. It needs to be controlled with high accuracy. In addition, at present, tolerances that can be deviated from the target pressure increase rate are strictly defined by regulations. Therefore, in the current filling, filling is generally performed using a control valve capable of controlling the flow rate with high accuracy.

JP 2010-144771 A

  However, in recent years, it has been required to increase the capacity of an on-vehicle tank, increase the filling pressure, and increase the filling speed. For this reason, when the target pressure increase rate is large, there is a case where the flow rate for following the target pressure increase rate cannot be secured with one control valve. On the other hand, if a control valve with a large Cv value is used, at the start of filling with a large pressure difference, the tolerance defined in the standard is greatly deviated in the range of a small Cv value, and flow control can be performed with high accuracy. There wasn't. In such a case, it becomes impossible to follow an optimum filling protocol, which causes a problem that safe and efficient hydrogen filling cannot be performed. This problem is not limited to hydrogen gas, but is a problem common to all fuel gases that are filled in a vehicle tank at high pressure in a short time.

  In view of the above circumstances, an object of the present invention is to provide a technique capable of filling fuel gas safely and efficiently.

The present invention has the following configuration.
One aspect of the present invention, a pressure accumulator for storing hydrogen gas, a plurality of regulating valve flow rate capable of controlling the hydrogen gas supplied to the container from the pressure accumulator, a control for controlling the opening of the regulating valve The control valve is configured to include a main control valve and a sub control valve provided in parallel, and each of the main control valve and the sub control valve has the valve opening degree fully closed. The valve is adjustable until fully opened, and the controller is configured to increase the pressure rate table based on information on the outside air temperature and information on the initial residual pressure in the container according to a hydrogen filling protocol when filling with hydrogen gas. Depending on the target pressure increase rate (MPa / min) determined by the control, either the opening of the main control valve and the opening of the sub control valve, or the opening of the sub control valve is controlled. When the target pressure increase rate is equal to or higher than a first threshold value, the sub control valve The container is filled with the hydrogen gas by controlling the opening of the main control valve while the opening of the secondary control valve is fixed at a certain opening after the opening of the sub control valve, and the target pressure increase rate is When it is less than one threshold value, the hydrogen gas filling system is characterized in that the container is filled with the hydrogen gas by controlling the opening degree of the sub regulating valve.

One aspect of the present invention is the above hydrogen gas filling system, wherein the maximum Cv value of the main control valve and the maximum Cv value of the sub control valve are different values.

One aspect of the present invention is the above hydrogen gas filling system, wherein the maximum Cv value of the main control valve is larger than the maximum Cv value of the sub control valve.

One aspect of the invention is the hydrogen gas filling system described above, in which the control device controls a degree of opening of the main control valve and the sub control valve while filling the hydrogen gas. Filling is performed by closing the main control valve and controlling the opening of the sub control valve when the pressure increase rate is less than a second threshold value that is the same as or different from the first threshold value. To do.

One aspect of the present invention, a pressure accumulator for storing hydrogen gas, a plurality of regulating valve flow rate capable of controlling the hydrogen gas supplied to the container from the pressure accumulator, a control for controlling the opening of the regulating valve A hydrogen gas filling method in a hydrogen gas filling system, wherein the control valve includes a main control valve and a sub control valve provided in parallel, and the main control valve and the sub control Each of the valves is a valve that can adjust the opening of the valve from fully closed to fully open, and when the controller is filled with hydrogen gas , the control device uses the hydrogen filling protocol to provide information on the outside temperature and the inside of the container. Depending on the target pressure increase rate (MPa / min) determined by the pressure increase rate table based on the information of the initial residual pressure, both the opening of the main control valve and the opening of the sub control valve, or the Control any of the opening of the sub-regulator, When the target pressure increase rate is equal to or greater than the first threshold, the opening of the master control valve is controlled while the opening of the slave control valve is fixed at a certain opening after the slave control valve is opened. Filling the container with the hydrogen gas , and when the target pressure increase rate is less than a first threshold value , filling the container with the hydrogen gas by controlling the opening of the sub regulating valve. This is a hydrogen gas filling method.

  According to the present invention, fuel gas can be filled safely and efficiently.

It is a block diagram of the hydrogen filling environment containing the hydrogen gas filling system 1 in this embodiment. 2 is a schematic block diagram illustrating a functional configuration of a control device 10. FIG. It is a flowchart which shows the flow of the filling process of the control apparatus 10 in this embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram of a hydrogen filling environment including a hydrogen gas filling system 1 in the present embodiment.
The hydrogen gas filling system 1 (fuel gas filling system) is a system for supplying hydrogen gas (fuel gas) into an in-vehicle tank (not shown, the same applies hereinafter) (container) of the FCV 2. In the hydrogen gas filling system 1, the hydrogen gas stored in the pressure accumulator (accumulator) is filled into the FCV 2 only by differential pressure filling. The hydrogen gas filling system 1 is, for example, a hydrogen station.

FCV2 is a fuel cell vehicle that travels using power generated by an electrochemical reaction between hydrogen gas and oxygen gas as a power source. The hydrogen gas filling system 1 and the FCV 2 are connected by a filling coupler 3.
The filling coupler 3 is a coupling member for connecting the hydrogen gas filling system 1 and the FCV 2. By connecting the hydrogen gas filling system 1 and the FCV 2 by the filling coupler 3, the hydrogen gas can be supplied from the hydrogen gas filling system 1 to the FCV 2. Further, the detection data of the pressure and temperature in the in-vehicle tank of the FCV 2 is transmitted to the control device 10 by connecting the filling coupler 3.

Next, a specific configuration of the hydrogen gas filling system 1 will be described. The hydrogen gas filling system 1 includes a control device 10 (control device), accumulators 20-1 to 20-N (N is an integer of 2 or more), pressure gauges 21-1 to 21-N, and a shutoff valve 22-. 1 to 22-N, check valves 23-1 to 23-N, control valves 30-1 to 30-2 (control valves), flow meter 40, pressure gauge 41, precooler 42, and shut-off A valve 43, a pressure gauge 44, and a thermometer 45 are provided. The control valve 30-1 (main control valve) and 30-2 (secondary control valve) are provided in parallel.
In the embodiment of the present invention, the control valves 30-1 and 30-2 are provided on the upstream side of the flow meter 40 as shown in FIG. 1, but the present invention is not limited to this, and the flow meter of FIG. Any position from the downstream side of 40 to the upstream side of the filling coupler 3 may be provided.

  The solid line shown in FIG. 1 represents the supply line 11 through which the hydrogen gas stored in the pressure accumulators 20-1 to 20-N flows. The broken lines shown in FIG. 1 indicate data including any of the detection results detected by each sensor device (for example, the pressure gauges 21-1 to 21-N, the flow meter 40, the pressure gauge 41, the pressure gauge 44, and the thermometer 45). (Hereinafter referred to as “detection data”) The detection data includes, for example, one or both of pressure value, flow rate value, and temperature information. 10 represents a control line indicating that 10 controls each valve (for example, cutoff valves 22-1 to 22-N, control valves 30-1 to 30-2, and cutoff valve 43).

The control device 10 controls the opening and closing of the shutoff valves 22-1 to 22-N, the control valves 30-1 to 30-2, and the shutoff valve 43. When one of the cutoff valves 22-1 to 22-N, one of the adjusting valves 30-1 to 30-2 and the cutoff valve 43 are opened by the control of the control device 10, the cutoff valves 22-1 to 22-1 are opened. Hydrogen gas is supplied from the pressure accumulators 20-1 to 20 -N connected to 22 -N through the supply line 11 to the in-vehicle tank of the FCV 2.
The supply line 11 is piping.

The pressure accumulators 20-1 to 20-N store high-pressure hydrogen gas compressed by a compressor (not shown). The pressure accumulators 20-1 to 20-N are not particularly limited to materials and shapes as long as they can store hydrogen gas of about 95 MPa. Generally, a large cylinder ore seamless cylinder or curdle is used.
The pressure gauges 21-1 to 21-N are provided between the pressure accumulators 20-1 to 20-N and the shutoff valves 22-1 to 22-N, respectively, and are installed in the pressure accumulators 20-1 to 20-N. The pressure of hydrogen gas is detected. Detection data including the pressure value of the hydrogen gas detected by the pressure gauges 21-1 to 21 -N is transmitted to the control device 10.

  The shut-off valves 22-1 to 22-N are provided for the pressure accumulators 20-1 to 20-N, respectively. The shutoff valves 22-1 to 22-N are valves that can shut off the supply of hydrogen gas stored in the pressure accumulators 20-1 to 20-N. For example, when the shutoff valves 22-1 to 22-N are closed, the supply of hydrogen gas stored in the pressure accumulators 20-1 to 20-N is shut off. On the other hand, when any one of the shutoff valves 22-1 to 22-N is opened, the hydrogen gas stored in the opened pressure accumulators 20-1 to 20-N is supplied to the supply line 11. The The shut-off valves 22-1 to 22-N are opened and closed according to the control of the control device 10.

  The check valves 23-1 to 23-N are provided for the shut-off valves 22-1 to 22-N, respectively. The check valves 23-1 to 23 -N are valves that prevent the backflow of hydrogen gas flowing in the supply line 11. In the present embodiment, the check valves 23-1 to 23-N supply hydrogen gas only in the direction in which hydrogen gas is supplied from the accumulators 20-1 to 20-N to the FCV 2 (in the direction of the arrow in FIG. 1). Installed in any possible orientation. That is, hydrogen gas does not flow in the direction from the check valves 23-1 to 23-N to the pressure accumulators 20-1 to 20-N.

The adjustment valve 30-1 is a valve whose opening degree can be adjusted. The flow rate of the hydrogen gas flowing through the supply line 11 is adjusted by changing the opening degree of the control valve 30-1. The maximum Cv value of the control valve 30-1 is larger than the maximum Cv value of the control valve 30-2. Here, the Cv value is a numerical value indicating the capacity of the control valve, and represents the amount of fluid (for example, hydrogen gas) that passes through the control valve per unit time when the opening is fully opened. In the case of a control valve, the Cv value can be controlled from 0 to the maximum Cv value by controlling the opening degree from fully closed to fully open. The maximum Cv value of the control valve is predetermined for each control valve depending on the type of the valve and the port diameter. In the following description, the control valve 30-1 will be described as a main control valve.
The adjustment valve 30-2 is a valve whose opening degree can be adjusted. The flow rate of the hydrogen gas flowing through the supply line 11 is adjusted by changing the opening degree of the control valve 30-2. In the following description, the control valve 30-2 will be described as a slave control valve.

The flow meter 40 detects the flow rate of hydrogen gas flowing through the supply line 11. The flow meter 40 detects the temperature of the hydrogen gas flowing through the supply line 11. Detection data including the flow rate value and temperature of the hydrogen gas detected by the flow meter 40 is transmitted to the control device 10.
The pressure gauge 41 is provided between the flow meter 40 and the precooler 42 and detects the pressure of hydrogen gas flowing through the supply line 11. Detection data including the pressure value of the hydrogen gas detected by the pressure gauge 41 is transmitted to the control device 10.

The precooler 42 cools the hydrogen gas flowing through the supply line 11.
The shut-off valve 43 is a valve that is provided between the precooler 42 and the filling coupler 3 and can shut off the supply of hydrogen gas flowing through the supply line 11. For example, when the shutoff valve 43 is closed, the supply of hydrogen gas flowing through the supply line 11 is shut off. On the other hand, when the shutoff valve 43 is opened, hydrogen gas flowing through the supply line 11 is supplied to the FCV 2. The shut-off valve 43 is opened and closed according to the control of the control device 10.

The pressure gauge 44 is provided between the shut-off valve 43 and the filling coupler 3 and detects the pressure of hydrogen gas flowing through the supply line 11. Detection data including the pressure value of the hydrogen gas detected by the pressure gauge 44 is transmitted to the control device 10. Note that the pressure value of the hydrogen gas detected by the pressure gauge 44 substantially coincides with the pressure in the in-vehicle tank of the FCV2.
The thermometer 45 detects the outside air temperature. Detection data including the outside air temperature detected by the thermometer 45 is transmitted to the control device 10.

  In the following description, the pressure accumulators 20-1 to 20-N will be referred to as the pressure accumulator 20 unless otherwise distinguished. In the following description, the pressure gauges 21-1 to 21-N will be referred to as pressure gauges 21 unless otherwise distinguished. In the following description, the cutoff valves 22-1 to 22-N are referred to as cutoff valves 22 unless otherwise distinguished. In the following description, the check valves 23-1 to 23-N will be referred to as check valves 23 unless otherwise distinguished. In the following description, the pressure gauges 21, 41 and 44 are simply referred to as pressure gauges unless otherwise distinguished. In the following description, the shutoff valves 22 and 43 are simply referred to as shutoff valves unless otherwise distinguished.

  FIG. 2 is a schematic block diagram illustrating a functional configuration of the control device 10. The control device 10 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a control program. By executing the control program, the control device 10 functions as a device including the valve control unit 101, the acquisition unit 102, the pressure increase rate information storage unit 103, and the determination unit 104. All or some of the functions of the control device 10 may be realized by using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). The control program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. Further, the control program may be transmitted / received via a telecommunication line.

  The valve control unit 101 controls the opening / closing of the shutoff valve, the main control valve, and the sub control valve based on the target pressure increase rate determined by the determination unit 104. For example, when the target pressure increase rate determined by the determination unit 104 is greater than or equal to the threshold value, the valve control unit 101 performs filling with the main control valve and the sub control valve so as to perform filling with the main control valve and the sub control valve. The shutoff valve 22 and the shutoff valve 43 corresponding to the pressure accumulator 20 (hereinafter referred to as “charging accumulator”) are controlled. On the other hand, when the target pressure increase rate determined by the determining unit 104 is less than the threshold value, the valve control unit 101 performs filling with the sub-regulator valve and the shut-off valve 22 corresponding to the charging accumulator. And the shutoff valve 43 is controlled.

  In addition, the valve control unit 101 may change the target pressure increase rate after the change (hereinafter referred to as “the pressure increase after change”) when the target pressure increase rate is changed while the hydrogen gas is being charged. The shutoff valve, the main control valve, and the sub-control valve are controlled on the basis of the ratio. For example, the valve control unit 101 continues the current control when the post-change pressure increase rate is equal to or greater than the threshold value. On the other hand, the valve control unit 101 closes the main control valve when the post-change pressure increase rate is less than the threshold value, and shuts off the corresponding control valve and the filling accumulator so as to perform the filling by the sub regulating valve. The valve 22 and the shutoff valve 43 are controlled. The condition for changing the target boost rate is, for example, occurrence of top-off or occurrence of fallback. Currently, it is necessary to change the target step-up rate when top-off or fallback occurs. For example, it is necessary to change to a target pressure increase rate smaller than the target pressure increase rate at the start of filling. Therefore, when top-off occurs or when fallback occurs, the valve control unit 101 determines that the condition for changing the target pressure increase rate is satisfied, and changes the target pressure increase rate. The valve control unit 101 changes the target pressure increase rate from the target pressure increase rate at the start of filling according to the existing technology. Note that the condition for changing the target step-up rate need not be limited to the above.

  The acquisition unit 102 obtains any or all of the pressure value detected by each pressure gauge, the hydrogen gas flow value and temperature information detected by the flow meter 40, and the outside air temperature information detected by the thermometer 45. Get the detected data. Further, the acquisition unit 102 acquires information on the pressure (hereinafter referred to as “initial residual pressure”) remaining in the in-vehicle tank of the FCV 2 at the start of hydrogen gas filling.

The step-up rate information storage unit 103 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The step-up rate information storage unit 103 stores a step-up rate table. In the pressure increase rate table, the value of the target pressure increase rate for each combination of the outside air temperature and the initial residual pressure is registered. That is, the value of the target pressure increase rate that is determined when the outside air temperature information and the initial residual pressure information are acquired is registered in the pressure increase rate table.
The determination unit 104 refers to the pressure increase rate table, and determines the target pressure increase rate based on the information on the outside air temperature included in the detection data acquired by the acquisition unit 102 and the information on the initial residual pressure.

Next, the filling method in this embodiment is demonstrated.
FIG. 3 is a flowchart showing the flow of the filling process of the control device 10 in the present embodiment. In addition, at the time of start, the case where the pressure of the pressure accumulator 20 is higher than the initial residual pressure will be described as an example.
The acquisition unit 102 periodically acquires detection data (step S101). For example, the acquisition unit 102 acquires information on the pressure value, the flow value, the temperature, and the outside air temperature from the pressure gauge, the flow meter 40, and the thermometer, respectively. Next, the acquisition part 102 acquires the information of the initial residual pressure in the vehicle-mounted tank of FCV2 connected to the hydrogen gas filling system 1 (step S102). Thereafter, the acquisition unit 102 outputs the information (detection data and initial residual pressure information) acquired in the processes of steps S101 and S102 to the determination unit 104. In the present embodiment, the information on the initial residual pressure of the in-vehicle tank is automatically acquired. However, the present invention is not limited to this, and the information may be input by a worker.

  The determination unit 104 determines a target boost rate based on the information output from the acquisition unit 102 and the boost rate table stored in the boost rate information storage unit 103 (step S103). Specifically, first, the determination unit 104 reads a boost rate table stored in the boost rate information storage unit 103. Next, the determination unit 104 selects a target pressure increase rate corresponding to a combination of the information on the initial residual pressure and the information on the outside air temperature from the target pressure increase rates registered in the read pressure increase rate table. Then, the determination unit 104 determines the value of the selected target pressure increase rate as the target pressure increase rate at the time of filling hydrogen gas at that time.

  The valve control unit 101 determines whether or not the target pressure increase rate determined by the determination unit 104 is greater than or equal to a threshold value (for example, 20 Mpa / min) (step S104). The threshold is set in advance. When the target pressure increase rate is less than the threshold value (step S104-NO), the valve control unit 101 controls the sub regulating valve so as to perform filling with the sub regulating valve (step S105). Specifically, the valve control unit 101 opens the slave control valve (the control valve 30-2 in the present embodiment), the cutoff valve 43, and the cutoff valve 22 corresponding to the charging pressure accumulator. At this time, the main control valve is in a closed state. When the sub-regulator valve, the shut-off valve 43, and the shut-off valve 22 corresponding to the charging accumulator are opened, the hydrogen gas stored in the charging accumulator passes through the sub-regulator valve by differential pressure filling. The FCV 2 is filled through the supply line 11. The valve control unit 101 controls the opening of the adjustment valve so as to follow the target pressure increase rate until the end of filling.

  On the other hand, when the target pressure increase rate is equal to or greater than the threshold value (NO in step S104), the valve control unit 101 controls the main control valve and the sub control valve so as to perform filling with the main control valve and the sub control valve (step S106). . Specifically, the valve control unit 101 opens the main control valve (the control valve 30-1 in the present embodiment), the cutoff valve 43, and the cutoff valve 22 corresponding to the charging accumulator. At this time, the valve control unit 101 opens and stands by so that the opening degree of the sub regulating valve becomes a predetermined opening degree (for example, 50%). When the main control valve, the sub control valve, the shut-off valve 43, and the shut-off valve 22 corresponding to the filling accumulator are opened, the hydrogen gas stored in the filling accumulator is mainly charged by the differential pressure filling. The FCV 2 is filled through the supply line 11 that passes through the control valve and the sub control valve. At this time, the valve control unit 101 controls the opening of the main control valve so as to follow the target pressure increase rate.

Thereafter, when the condition for changing the target pressure increase rate is satisfied and the target pressure increase rate is changed, the valve control unit 101 determines whether or not the post-change pressure increase rate is less than the threshold value (step S107). In the present embodiment, the threshold value in the process of step S107 is the same value as the threshold value in the process of step S104. When the post-change pressure increase rate is not less than the threshold (step S107—NO), the valve control unit 101 maintains the current control and controls the opening of the main control valve so as to follow the target pressure increase rate. This is performed (step S108). Then, the control apparatus 10 performs the process after step S107.
On the other hand, when the post-change pressure increase rate is less than the threshold value (step S107—YES), the valve control unit 101 closes the main control valve and controls the sub control valve to charge hydrogen gas (step S108). . Specifically, the valve control unit 101 performs filling by controlling the opening of the adjustment valve so as to follow the target pressure increase rate.

  According to the hydrogen gas filling system 1 configured as described above, the flow rate required to follow the target pressure increase rate can be secured by using the plurality of control valves 30. Specifically, first, when the target pressure increase rate is equal to or greater than the threshold value, the control device 10 keeps the slave control valve (for example, the control valve 30-2) fixed at a certain opening (for example, 50%) and performs the main control. Filling is performed while controlling the flow rate by controlling the opening of the valve (for example, the control valve 30-1). Thereafter, when the target pressure increase rate becomes less than the threshold value, the control device 10 closes the main control valve and performs filling while controlling the flow rate by controlling the opening of the sub control valve. Thereby, the follow-up accuracy to the target pressure increase rate at the end of filling can be improved. Therefore, it is possible to follow an optimal filling protocol and to fill the fuel gas safely and efficiently.

  Further, in the present embodiment, even when filling with the main control valve (when the target pressure increase rate is equal to or higher than a predetermined threshold value), the opening of the sub control valve has a predetermined opening (for example, 50%). Opening degree). As a result, it is possible to prevent a momentary interruption when the filling by the sub control valve is switched from the main control valve.

<Modification>
In the present embodiment, the control valve 30-1 and the control valve 30-2 are described as examples of the control valve 30 having different maximum Cv values. However, the control valve 30-1 and the control valve 30-2 have the maximum Cv value. May be the same. In the case of such a configuration, one of the control valve 30-1 and the control valve 30-2 operates as a main control valve, and the other operates as a sub control valve.
Thereby, the main control valve and the sub control valve can be freely switched. For example, when the control valve 30-1 is continuously used as the main control valve, it is assumed that the control valve 30-1 is consumed more severely than the control valve 30-2 operating as a sub control valve. In this regard, by making the maximum Cv values of the control valve 30-1 and the control valve 30-2 the same, the control valve 30 that operates as the main control valve and the control valve 30 that operates as the sub control valve are periodically replaced. In this way, it is possible to reduce the risk that only one of the control valves 30 is unilaterally consumed.

In the present embodiment, the hydrogen gas filling system 1 has been described with a configuration including two control valves 30, but is not limited thereto, and is configured to include three or more control valves 30. May be. In the case of such a configuration, any one of the control valves 30 serves as a main control valve, and any one of the remaining control valves 30 serves as a sub control valve.
In the present embodiment, the FCV2 in-vehicle tank has been described as an example of the hydrogen gas filling destination, but the present invention is not limited to this. For example, the filling destination of hydrogen gas may be any container as long as it can be filled with hydrogen gas.
In the present embodiment, hydrogen gas has been described as an example of the fuel gas. However, the fuel gas may be any gas as long as it can be used for the FCV 2 by generating electric power through an electrochemical reaction.

Moreover, in this embodiment, although the hydrogen gas filling system 1 has shown the structure provided with the several pressure accumulator 20, the hydrogen gas filling system 1 may be comprised so that the one pressure accumulator 20 may be provided.
In the present embodiment, the case where the threshold in the process of step S104 in FIG. 3 is the same as the threshold in the process of step S107 has been described as an example. However, the threshold in the process of step S104 of FIG. The threshold value in this process may be a different value.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Hydrogen gas filling system, 2 ... FCV, 3 ... Filling coupler, 10 ... Control device, 20 (20-1 to 20-N) ... Accumulator, 21 (21-1 to 21-N), 41, 44 ... Pressure gauge, 22 (22-1 to 22-N), 43 ... shut-off valve, 23 (23-1 to 23-N) ... check valve, 30-1 to 30-2 ... control valve, 40 ... flow meter, DESCRIPTION OF SYMBOLS 42 ... Precooler, 45 ... Thermometer, 101 ... Valve control part, 102 ... Acquisition part, 103 ... Boosting rate information storage part, 104 ... Determination part

Claims (5)

A pressure accumulator for storing hydrogen gas ;
A plurality of control valves capable of controlling the flow rate of the hydrogen gas supplied from the pressure accumulator to the container;
A control device for controlling the opening of the control valve;
With
The control valve includes a main control valve and a sub control valve provided in parallel, and each of the main control valve and the sub control valve adjusts the opening of the valve from fully closed to fully open. Is a possible valve,
The control device, when filling hydrogen gas , a target pressure increase rate (MPa / min) determined by a pressure increase rate table based on information on the outside air temperature and information on the initial residual pressure in the container according to a hydrogen filling protocol In accordance with the control, either the opening of the main control valve and the opening of the sub control valve or the opening of the sub control valve is controlled, and the target pressure increase rate is equal to or greater than a first threshold value. In some cases, filling the hydrogen gas into the container by controlling the opening of the main control valve while fixing the opening of the sub control valve at a certain opening after opening the sub control valve. was carried out, wherein when the target step-up ratio is less than the first threshold value, the hydrogen gas filling which is characterized in that the filling of the container of the hydrogen gas by controlling the degree of opening of the sub regulating valve system. 2. The hydrogen gas filling system according to claim 1, wherein the maximum Cv value of the main control valve and the maximum Cv value of the sub control valve are different values. 3. The hydrogen gas filling system according to claim 1, wherein a maximum Cv value of the main control valve is larger than a maximum Cv value of the sub control valve. The controller is
When the target pressure increase rate is less than a second threshold value that is the same as or different from the first threshold value, while controlling the opening of the main control valve and the sub control valve and filling the hydrogen gas The hydrogen gas filling system according to any one of claims 1 to 3, wherein filling is performed by closing the main control valve and controlling an opening degree of the sub control valve. A pressure accumulator for storing hydrogen gas ;
A plurality of control valves capable of controlling the flow rate of the hydrogen gas supplied from the pressure accumulator to the container; and a control device for controlling the opening of the control valve;
A hydrogen gas filling method in a hydrogen gas filling system comprising:
The control valve includes a main control valve and a sub control valve provided in parallel, and each of the main control valve and the sub control valve adjusts the opening of the valve from fully closed to fully open. Is a possible valve,
A target pressure increase rate (MPa / min) determined by the pressure increase rate table based on the information on the outside air temperature and the information on the initial residual pressure in the container according to the hydrogen charging protocol when the control device is charged with hydrogen gas In accordance with the control, either the opening of the main control valve and the opening of the sub control valve or the opening of the sub control valve is controlled, and the target pressure increase rate is equal to or greater than a first threshold value. In some cases, filling the hydrogen gas into the container by controlling the opening of the main control valve while fixing the opening of the sub control valve at a certain opening after opening the sub control valve. When the target pressure increase rate is less than a first threshold value, the hydrogen gas filling method of filling the container with the hydrogen gas by controlling the opening degree of the slave control valve.

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