Hydrogen supply system

Abstract

To provide a hydrogen supply system capable of suppressing hydrogen leakage.SOLUTION: A hydrogen supply system comprising: a detachable hydrogen tank; a hydrogen consuming device configured to consume hydrogen in the hydrogen tank; and a control device, wherein the hydrogen consuming device comprises a detachment mechanism configured to detach the hydrogen tank from the hydrogen consuming device, wherein the attachment / detachment mechanism includes a motor configured to control attachment / detachment of the hydrogen tank with respect to the hydrogen consumption apparatus, and a hydrogen tank biasing mechanism configured to transmit biasing force to the hydrogen tank, and the control device performs stop control of stopping control of the motor of the attachment / detachment mechanism when an abnormality is detected in at least one of the hydrogen tank and the hydrogen consumption apparatus in a state where the hydrogen tank is connected to the hydrogen consumption apparatus and hydrogen is supplied from the hydrogen tank to the hydrogen consumption apparatus.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a hydrogen supply system. [Background technology]

[0002] Patent Document 1 discloses a mobile body equipped with a detachable hydrogen tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-056947 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional hydrogen supply systems, if an emergency shutdown or unintended power outage occurs in at least one of the hydrogen tank and the hydrogen consuming device, the hydrogen tank remains connected to the hydrogen piping unless the hydrogen tank and the hydrogen consuming device are disconnected, and hydrogen continues to leak in the event of a hydrogen leak. Furthermore, even if the hydrogen tank and the hydrogen consuming device are disconnected, there is a risk of residual hydrogen leaking downstream of the hydrogen tank.

[0005] The present disclosure has been made in consideration of the above-described circumstances, and has as its main object to provide a hydrogen supply system that can suppress hydrogen leakage. [Means for solving the problem]

[0006] That is, the present disclosure includes the following aspects. <1> A hydrogen supply system having a detachable hydrogen tank, a hydrogen consumption device that consumes hydrogen in the hydrogen tank, and a control device, the hydrogen consumption device is provided with a detachment mechanism for attaching and detaching the hydrogen tank to and from the hydrogen consumption device; the detachment mechanism includes a motor that controls the attachment and detachment of the hydrogen tank to and from the hydrogen consumption device, and a hydrogen tank biasing mechanism that transmits a biasing force to the hydrogen tank; The control device performs stop control, stopping control of the motor of the detachment mechanism, when an abnormality is detected in at least one of the hydrogen tank and the hydrogen consumption device while the hydrogen tank is connected to the hydrogen consumption device and hydrogen is being supplied from the hydrogen tank to the hydrogen consumption device.

[0007] <2> the detachment mechanism has a locking portion that locks the hydrogen tank in a predetermined position when restricting movement of the hydrogen tank, when an abnormality is detected in at least one of the hydrogen tank and the hydrogen consumption device, the control device performs lock control to lock the hydrogen tank using the lock unit, the control device performs the stop control after performing the lock control, <1> The hydrogen supply system according to claim 1.

[0008] <3> the detachment mechanism has a detachment machine that can detach the hydrogen tank, the desorber has a movable part that moves the hydrogen tank by controlling the motor, and a fitting part that fits with the hydrogen tank, the movable portion has an engaging recess that can engage with the locking portion, The locking portion is a locking pin. <2> The hydrogen supply system according to claim 1.

[0009] <4> the hydrogen tank has a first connection portion; the fitting portion has a second connection portion, When the hydrogen tank is fitted to the fitting portion, the first connection portion of the hydrogen tank and the second connection portion of the fitting portion are connected. <3> The hydrogen supply system according to claim 1.

[0010] <5> the first connection part is an on-off valve, The second connecting part is a push rod. <4> The hydrogen supply system according to claim 1. [Effects of the Invention]

[0011] The hydrogen supply system of the present disclosure can suppress hydrogen leakage. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a hydrogen supply system according to the present disclosure. [Figure 2] FIG. 2 is a schematic diagram showing an example of a state in which the hydrogen tank is placed at the hydrogen supply standby position W. As shown in FIG. [Figure 3] FIG. 3 is a schematic diagram showing an example of a state in which the hydrogen tank is placed at the hydrogen supply start position S. In FIG. [Figure 4] FIG. 4 is a flowchart showing an example of control according to the present disclosure. [Figure 5] FIG. 5 is a diagram showing an example of a time chart when an emergency stop abnormality is detected in the connection control of the hydrogen tank shown in FIG. [Figure 6] FIG. 6 is a diagram showing an example of a time chart when a power cut-off abnormality is detected during the connection control of the hydrogen tank shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present disclosure provides a hydrogen supply system having a detachable hydrogen tank, a hydrogen consumption device that consumes hydrogen from the hydrogen tank, and a control device, wherein the hydrogen consumption device is equipped with a detachment mechanism for detaching and attaching the hydrogen tank to the hydrogen consumption device, and the detachment mechanism has a motor that controls the detachment and attachment of the hydrogen tank to the hydrogen consumption device, and a hydrogen tank biasing mechanism that transmits a biasing force to the hydrogen tank, and the control device performs stop control to stop control of the motor of the detachment mechanism when an abnormality is detected in at least one of the hydrogen tank or the hydrogen consumption device when the hydrogen tank is connected to the hydrogen consumption device and hydrogen is being supplied from the hydrogen tank to the hydrogen consumption device.

[0014] The hydrogen supply system of the present disclosure includes a detachable hydrogen tank, a hydrogen consumption device that consumes hydrogen in the hydrogen tank, and a control device. The hydrogen supply system of the present disclosure may be used in mobile objects such as vehicles, trains, ships, and aircraft, and stationary power generation systems such as fuel cell generators. Examples of vehicles include fuel cell vehicles and hydrogen engine vehicles.

[0015] [Hydrogen tank] A hydrogen tank (hereinafter sometimes referred to as a tank) is a container for storing hydrogen, and hydrogen is supplied from the hydrogen tank to a hydrogen consuming device. A hydrogen supply system includes multiple (n) hydrogen tanks. n may be an integer of 2 or greater, with no particular upper limit. The hydrogen tank may be any known tank as long as it is detachable. The hydrogen tank comprises a hydrogen tank body, which is the part that stores hydrogen, and a hydrogen supply port, which is the entrance and exit for hydrogen in the hydrogen tank body.

[0016] The hydrogen tank may have a first connection part (a connection part on the hydrogen tank side) that is connected to the hydrogen consuming device. The first connection part includes a hydrogen supply port. The first connection part may be an on-off valve (sometimes referred to as a tank shutoff valve) or the like. The on-off valve may have a valve body and a hydrogen supply port. The valve disc is a switching valve that allows or restricts communication between the inside and outside of the hydrogen tank. The valve disc is biased so as to restrict communication when closed, and pressing the valve disc against the biasing force moves the valve disc to allow communication. A push rod may be provided on the hydrogen consumption device as a means for pressing the valve disc, since pressure is applied to and released from the valve disc to allow or restrict communication. A push rod is inserted into the hydrogen supply port.

[0017] The hydrogen tank may be provided with a handle that can be grasped when attaching or detaching the hydrogen tank to or from the hydrogen consuming device.

[0018] [Hydrogen consumption device] The hydrogen consuming device is a device to which hydrogen is supplied from the hydrogen tank, and receives and consumes hydrogen.

[0019] The hydrogen consuming device is provided with a detachment mechanism for attaching and detaching the hydrogen tank to and from the hydrogen consuming device. The detachment mechanism includes at least one motor and a hydrogen tank biasing mechanism that transmits a biasing force to the hydrogen tank.

[0020] The motor controls the attachment and detachment of the hydrogen tank to the hydrogen consuming device. The hydrogen consuming device may include a plurality of (n) motors corresponding to the attachment and detachment of each of the plurality of (n) hydrogen tanks. The motor may be one that transmits the driving force of the motor directly to the hydrogen tank, or may be one that transmits the driving force to a moving part of the desorber. The motor may be a stepper motor. The stepping motor is a power source that moves a movable part via gears. The specific form of the stepping motor is not particularly limited, and any known stepping motor can be used. The stepping motor is electrically connected to a control device, and the rotation angle and rotation speed are controlled based on signals from the control device, thereby controlling the movement of the movable part with high precision. The stepper motor may be equipped with sensors such as a position sensor, a motor torque sensor, a motor temperature sensor, and the like. The position sensor detects the position of the hydrogen tank, particularly the position of the on-off valve. The position sensor may detect the position of the on-off valve based on the rotation angle of the stepping motor detected by the motor torque sensor, or may detect the position of the on-off valve based on the temperature of the stepping motor detected by the motor temperature sensor. The specific form of the sensor is not particularly limited, and any known sensor can be used. The sensor is electrically connected to the control device and is configured to be able to transmit the measured position of the hydrogen tank to the control device as a signal.

[0021] The detachment mechanism includes a hydrogen tank biasing mechanism. A hydrogen tank biasing mechanism means a mechanism that, in a free state unaffected by other external forces, has a biasing force that moves the hydrogen tank from a position where the first connection part of the hydrogen tank connects with the second connection part of the hydrogen consumption device (hydrogen supply start position) to a predetermined position in the direction where the first connection part of the hydrogen tank disconnects from the second connection part of the hydrogen consumption device (hydrogen supply standby position). The hydrogen tank biasing mechanism may transmit the biasing force of the biasing mechanism directly to the hydrogen tank, or may be a spring, etc. The hydrogen tank biasing mechanism may be configured such that the spring is attached to the hydrogen tank, or may be configured such that the spring is attached to a movable part.

[0022] The detachment mechanism may include a detachment machine (mounting part) that can detach the hydrogen tank. The detacher may have a fitting portion and a movable portion.

[0023] The fitting portion fits into the hydrogen tank. When the hydrogen tank is attached to the desorption machine, the fitting portion only needs to fit into at least the end of the hydrogen tank on the hydrogen supply port side, and may fit into the entire hydrogen tank or may also fit into the end of the movable portion on the side opposite the fitting portion. When the fitting portion of the hydrogen tank is fitted to the fitting portion, the first connecting portion of the hydrogen tank and the second connecting portion of the fitting portion are connected to each other.

[0024] The hydrogen consuming device may be provided with a second connection part (a connection part on the hydrogen consuming device side). The second connecting part is connected to the first connecting part of the hydrogen tank and forms a flow passage (communication) with the hydrogen tank. The second connecting part may be provided in a fitting part of the detacher. The second connecting part may be a push rod or the like. The push rod is a member that can press a valve element provided in the on-off valve of the hydrogen tank, and may be rod-shaped, and the tip of the push rod may be configured to be able to be inserted into the hydrogen supply port of the on-off valve. The push rod may also be configured to form a flow path that allows hydrogen to flow from the inside of the hydrogen tank to the supply flow path when the push rod presses the valve body to open the on-off valve.

[0025] The detachment mechanism may have a locking portion that locks the hydrogen tank in a predetermined position when restricting movement of the hydrogen tank. The predetermined position may be a hydrogen supply start position or a hydrogen supply standby position. During lock control, the locking unit locks the hydrogen tank in a predetermined position, placing it in a locked state that restricts movement of the hydrogen tank, and during unlock control, it releases the lock and places the hydrogen tank in an unlocked state that allows movement of the hydrogen tank. The locking unit is electrically connected to a control device, and the control device drives the locking unit based on an input signal to switch between a locked state that restricts movement of the hydrogen tank and an unlocked state that allows movement of the hydrogen tank. The locking portion may be a locking pin or the like. The lock pin may be disposed in the fitting portion. The lock pin is a pin that is arranged so as to be able to protrude and retract into the engagement recess of the movable part, and when protruding, it enters the inside of the engagement recess and can engage with the engagement recess. On the other hand, the lock pin is arranged so as not to engage with the engagement recess when retracted. The lock pin is electrically connected to a control device, and its projection and retraction are controlled based on signals from the control device.

[0026] The movable part moves the hydrogen tank by controlling a motor. The movable part moves in a direction in which the first connection part of the hydrogen tank approaches or moves away from the second connection part of the hydrogen consumption device. The movable part moves the hydrogen tank between a hydrogen supply stop position, a hydrogen supply standby position, and a hydrogen supply start position. The movable portion may have a tank insertion hole. The tank insertion hole is a space in which a hydrogen tank is stored, and may be a space surrounded by an inner wall, having an opening through which the hydrogen tank can be inserted and removed.

[0027] The movable portion may have an engaging recess (positioning hole) that can be engaged with the locking portion. The engaging recess may be provided on the underside of the movable part. The specific shape of the engaging recess is not particularly limited as long as it is configured to allow the lock pin to engage and disengage, and it may be a depression or a groove. The width of the engagement recess (the size in the direction in which the movable part moves) may be greater than the width of the lock pin, so that even when the lock pin protrudes so as to enter the inside of the engagement recess, the movable part can move within the range of the width of the engagement recess.

[0028] The movable part may be a movable stage. The movable mounting base is a component on whose upper surface a hydrogen tank can be placed, and if the platform has a tank insertion hole on its upper surface, the hydrogen tank can be inserted and secured into the tank insertion hole. The movable mounting base refers to a platform that, with a hydrogen tank placed on it, can move in the direction in which the first connection portion of the hydrogen tank connects with the second connection portion of the hydrogen consumption device, and in the direction in which the first connection portion of the hydrogen tank detaches from the second connection portion of the hydrogen consumption device. The means for movement is not particularly limited, but examples include a combination of rails and wheels. The movable platform may be a base (tank platform).

[0029] The hydrogen consuming device may comprise a hydrogen consuming appliance. Examples of hydrogen consuming devices include fuel cells, hydrogen engines, and the combustion section of a hydrogen burner.

[0030] The hydrogen consuming device may be provided with a supply passage (hydrogen piping). The supply flow path is a path that conducts hydrogen from the hydrogen tank to the hydrogen consuming device and is composed of piping. The supply flow paths extending from each hydrogen tank may be joined together to form a single supply flow path that is connected to the hydrogen consuming device.

[0031] The hydrogen consumer may include an injection. The injector is disposed in the supply flow path between the second connection part and the hydrogen consuming device, and controls the supply of hydrogen to the hydrogen consuming device. Examples of the injector include a check valve and a flow rate adjusting valve.

[0032] The hydrogen consuming device may be equipped with a pressure gauge. The pressure gauge may be provided in each supply flow path so as to correspond to the internal pressure of each hydrogen tank, or may measure the internal pressure of each supply flow path (pressure in the piping). The pressure gauge is configured to transmit the obtained pressure value data to the control device.

[0033] In the hydrogen consumption device, the hydrogen tank is inserted and fixed, the hydrogen tank is attached, and the hydrogen tank is detached. Inserting and fixing (setting) the hydrogen tank means the operation of placing the hydrogen tank at the position where installation of the hydrogen tank begins (hydrogen supply stop position). Specifically, this may be the operation of inserting and fixing the hydrogen tank manually from outside the hydrogen supply system into the hydrogen insertion hole of the movable part of the desorption machine of the desorption mechanism of the hydrogen consumption device. Installing a hydrogen tank means the operation of connecting the hydrogen tank and the hydrogen consumption device so that the hydrogen tank can supply hydrogen to the hydrogen consumption device; specifically, it means the operation of moving the hydrogen tank from the hydrogen supply stop position to a position (hydrogen supply standby position) where precise alignment begins for connecting the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device, and then moving the hydrogen tank from the hydrogen supply standby position to a position (hydrogen supply start position) where the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device are connected, and connecting the above pair of connections together. Detaching a hydrogen tank means the operation of disconnecting the first connection part of the hydrogen tank from the second connection part of the hydrogen consumption device, and moving the hydrogen tank from the hydrogen supply start position to the hydrogen supply standby position, and the operation of moving the hydrogen tank from the hydrogen supply standby position to the hydrogen supply stop position to make the hydrogen tank removable.

[0034] The hydrogen supply stop position is the position where attachment of the hydrogen tank to the hydrogen consumption device begins and where the hydrogen tank can be removed. Specifically, it is the position where the hydrogen tank is inserted and fixed into the hydrogen insertion hole of the movable part of the detachment device of the detachment mechanism of the hydrogen consumption device by manual operation from outside the hydrogen supply system. The hydrogen supply stop position may be a position farther from the fitting part of the detachment device than the hydrogen supply standby position. Specifically, it may be a position where the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device are not connected, and the movable part and the fitting part are not in contact, making locking by the lock pin impossible. The position where locking by the lock pin is impossible means a position where the distance from the push rod to the engagement recess of the movable part is farther than the distance from the push rod to the lock pin in the moving direction of the movable part of the detachment device. The hydrogen supply standby position may be any position where the hydrogen tank and the hydrogen consumption device are not connected and the hydrogen tank is waiting for hydrogen supply so that the hydrogen tank can supply hydrogen to the hydrogen consumption device, or it may be a position where the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device are not connected, for example, a position where precise alignment for connecting the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device is initiated by control of a motor, specifically a position where the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device are not connected, the movable part and the mating part are in contact, and locking with a lock pin is possible. The hydrogen supply start position may be any position where the hydrogen tank and the hydrogen consumption device are connected in a state where the hydrogen tank can supply hydrogen to the hydrogen consumption device, and specifically, may be a position where the first connection part of the hydrogen tank and the second connection part of the hydrogen consumption device are connected by control of a motor.

[0035] [Control device] The control device is a device that performs control, etc., for connecting the hydrogen tank to the hydrogen consuming device. The control device is a device that performs control, etc., for connecting the first connection part (open / close valve, etc.) of the hydrogen tank to the second connection part (push rod, etc.) of the hydrogen consuming device. The control device may be configured to be able to communicate with the lock pin, stepping motor, various sensors, injector, and pressure gauge. The control device may include a CPU (Central Processing Unit) which is a processor that performs calculations, a RAM (Random Access Memory) which functions as a working area, a ROM (Read-Only Memory) which functions as a recording medium, a receiving unit which is an interface that accepts information into the control device regardless of whether it is wired or wireless, and a transmitting unit which is an interface that sends information from the control device to the outside regardless of whether it is wired or wireless. Therefore, the control device may be configured so that various sensors and pressure gauges are connected to the receiving section to receive information, and so that the lock pin, stepping motor, and injection are connected to the transmitting section to send signals to them for their operation. The control device may be an ECU (electronic control unit) or the like.

[0036] The control device may determine whether or not there is an abnormality in the hydrogen tank and the hydrogen consumption device when the hydrogen tank is connected to the hydrogen consumption device and hydrogen is being supplied from the hydrogen tank to the hydrogen consumption device. When the hydrogen tank is connected to the hydrogen consumption device and hydrogen is being supplied from the hydrogen tank to the hydrogen consumption device, the control device performs stop control to stop the detachment control of the motor of the detachment mechanism if an abnormality is detected in at least one of the hydrogen tank or the hydrogen consumption device. In the event of an abnormality, the motor of the detachment mechanism is stopped, and the biasing force of a hydrogen tank biasing mechanism, such as a spring, provided in the detachment mechanism moves the hydrogen tank from the hydrogen supply start position to the hydrogen supply standby position. This closes the on-off valve and disconnects the hydrogen tank from the hydrogen piping. By disconnecting the hydrogen tank from the hydrogen piping, hydrogen leakage can be prevented. Residual hydrogen downstream of the hydrogen tank (such as hydrogen present in the space between the hydrogen tank, movable part, and fitting) is sealed between the hydrogen tank, movable part, and fitting, preventing it from leaking into the atmosphere.

[0037] Abnormalities include hydrogen leaks from hydrogen piping, misalignment of hydrogen tanks, emergency shutdowns of hydrogen-consuming equipment, and unintentional power outages. An abnormality may be detected, for example, when the hydrogen pressure or change in hydrogen pressure detected by the pressure sensor is not within a specified range, when the position of the hydrogen tank detected by the position sensor is not in the specified position, when the motor torque value detected by the motor torque sensor exceeds a threshold value, when the motor temperature detected by the motor temperature sensor exceeds a threshold value, or when a power supply interruption is detected by the power supply monitor.

[0038] When an abnormality is detected in at least one of the hydrogen tank and the hydrogen consumption device, the control device may perform locking control to lock the hydrogen tank using the locking unit, and after performing the locking control, perform stop control to stop control of the motor of the detachment mechanism. Under normal circumstances, the hydrogen tank is locked in a predetermined position by lock control using the locking unit, but in the event of an abnormality, lock control can be immediately performed again and then motor control can be stopped to prevent further hydrogen leakage. In the event of an abnormality, lock control can be performed again while the hydrogen tank is still in a locked state, or the lock can be released once using unlock control to put the hydrogen tank in an unlocked state, and then lock control can be performed again to lock the hydrogen tank.

[0039] The control device controls the attachment and detachment of the hydrogen tank to the hydrogen consuming device. The attachment / detachment control includes detachment control and attachment control. The detachment control includes a disconnection process and a separation process. The disconnection step is a step of moving the hydrogen tank relative to the hydrogen consuming device from the hydrogen supply start position to the hydrogen supply standby position, thereby disconnecting the hydrogen consuming device from the hydrogen tank. The separating step is a step of moving the hydrogen tank relative to the hydrogen consuming device from a hydrogen supply standby position to a hydrogen supply stop position, thereby making it possible to remove the hydrogen tank from the hydrogen consuming device. The mounting control includes an approaching step and a connecting step. The approaching step is a step of moving the hydrogen tank from a hydrogen supply stop position to a hydrogen supply standby position relative to the hydrogen consuming device. By the approaching step, the hydrogen tank is placed in a position where it is ready to supply hydrogen to the hydrogen consuming device. The connecting step is a step of moving the hydrogen tank relative to the hydrogen consuming device from a hydrogen supply standby position to a hydrogen supply start position, and connecting the hydrogen tank and the hydrogen consuming device so that the hydrogen tank can supply hydrogen to the hydrogen consuming device.

[0040] FIG. 1 is a diagram showing an example of the configuration of a hydrogen supply system according to the present disclosure. The hydrogen supply system 100 shown in Figure 1 includes a hydrogen tank 1, a desorber 2, a stepping motor 3, a lock pin 4, a positioning hole 5, a push rod 6, an on-off valve 7, a spring 8, a check valve 9, a pressure sensor 10, a supply flow path 11, a movable part 20, a fitting part 21, and a control device 50. F indicates the positioning direction, and the dashed arrows indicate the flow of hydrogen. Hydrogen is supplied through the supply flow path 11 to a hydrogen consuming device (not shown). As shown in Figure 1, the hydrogen tank 1 is positioned at the hydrogen supply stop position T in a state in which the opening / closing valve 7 of the hydrogen tank 1 is not connected to the push rod 6 in the fitting portion 21 of the desorption / sorption machine 2, the movable portion 20 is not in contact with the fitting portion 21, and the positioning hole 5 of the movable portion 20 is not locked by the lock pin 4. The hydrogen tank 1 located at the hydrogen supply stop position T is inserted and fixed into the tank insertion hole of the movable part 20 of the desorption machine 2 at the position where the hydrogen tank 1 begins to be fitted into the fitting part 21 of the desorption machine 2 (attached to the desorption machine 2). The hydrogen supply stop position T is a position that is farther from the push rod 6 than the distance from the push rod 6 to the lock pin 4 in the direction in which the movable part 20 of the desorber 2 can move.

[0041] FIG. 2 is a schematic diagram showing an example of a state in which the hydrogen tank is placed at the hydrogen supply standby position W. As shown in FIG. 2, the hydrogen tank 1 is placed in the hydrogen supply standby position W with the on-off valve 7 of the hydrogen tank 1 not connected to the push rod 6 in the fitting 21 of the desorber 2, the movable part 20 and the fitting 21 in contact, and the lock pin 4 pressed against the positioning hole 5 of the movable part 20 by the spring force of the spring 8. The on-off valve 7 of the hydrogen tank 1 is not connected to the push rod 6 in the fitting 21 of the desorber 2, and the on-off valve 7 is in a closed state. The hydrogen tank 1 placed at the hydrogen supply standby position W is not fitted into the fitting portion 21 of the desorber 2 (attached to the desorber 2) and is in a detached state from the desorber 2. 2 is also the state of the hydrogen tank 1 after an emergency stop is performed using the stop control of the present disclosure. In this state, the downstream space of the hydrogen tank 1, enclosed by the hydrogen tank 1, the movable part 20 of the desorber 2, and the fitting part 21, is isolated from the atmosphere, and residual hydrogen in the downstream part of the hydrogen tank 1 does not leak into the atmosphere.

[0042] FIG. 3 is a schematic diagram showing an example of a state in which the hydrogen tank is placed at the hydrogen supply start position S. In FIG. 3, the hydrogen tank 1 is placed at the hydrogen supply start position S, with the on-off valve 7 of the hydrogen tank 1 connected to the push rod 6 in the fitting 21 of the desorber 2 and locked in the positioning hole 5 of the movable part 20 by the lock pin 4. The on-off valve 7 of the hydrogen tank 1 is connected to the push rod 6 in the fitting 21 of the desorber 2, and the on-off valve 7 is in an open state. The hydrogen tank 1 placed at the hydrogen supply start position S is fitted into the fitting portion 21 of the desorber 2 and is attached to the desorber 2.

[0043] FIG. 4 is a flowchart showing an example of control according to the present disclosure. STEP 1: A person inserts and secures the hydrogen tank into the desorption machine. dcm1=dstp STEP 2: A human pushes a button to start the installation control of the hydrogen tank: xh2sply=ON Stepper motor control start: xmot1=ON Unlocking with locking pin: xlck1=ON -The stepping motor moves the hydrogen tank from the hydrogen supply stop position to the hydrogen supply standby position: dcm1=dstb Locking with locking pin: xlck1=OFF Stop the stepping motor control and use the spring force to push the moving part of the demounter against the lock pin (lock confirmation): xmot1=OFF The stepping motor moves the hydrogen tank from the hydrogen supply standby position to the hydrogen supply start position (at this time, the on-off valve and the push rod come into contact. The on-off valve opens due to the pressing force applied from the push rod to the on-off valve), and hydrogen supply begins: xmot1=ON, dcm1=dsply STEP 3: Hydrogen supply STEP 4: If no abnormality is detected during hydrogen supply, normal operation continues (desorption control is performed by manual stop operation). If an abnormality is detected during hydrogen supply, the following emergency stop procedure is performed. STEP 5: Relock using the lock pin: xlck1=OFF STEP 6: Stop the stepping motor control, and use the spring force to push the moving part of the desorption machine against the lock pin (the hydrogen tank moves to the hydrogen supply standby position, and the on-off valve closes). xmot1=OFF

[0044] dcm1: Hydrogen tank location dstp: Hydrogen supply stop position dstb: Hydrogen supply standby position dsply: Hydrogen supply start position xh2sply: Hydrogen tank detachment control instructions xmot1: Motor control status ON: Start of control, OFF: Stop of control xlck1: Lock pin status ON: Unlocked, OFF: Locked

[0045] FIG. 5 is a diagram showing an example of a time chart when an emergency stop abnormality is detected in the connection control of the hydrogen tank shown in FIG. In the event of an emergency stop, steps 4 to 6 above are executed in order. FIG. 6 is a diagram showing an example of a time chart when a power cut-off abnormality is detected during the connection control of the hydrogen tank shown in FIG. When the power is turned off, steps 4 to 6 are executed simultaneously. [Explanation of symbols]

[0046] 1 hydrogen tank 2 Desorption machine 3 Stepping motor 4 lock pins 5 Positioning holes 6 push rods 7 On-off valve 8 Springs 9. Check valve 10 Pressure Sensor 11 Supply channel 20 Moving parts 21 Fitting part 50 Control device 100 Hydrogen Supply System

Claims

1. A hydrogen supply system having a detachable hydrogen tank, a hydrogen consumption device that consumes hydrogen in the hydrogen tank, and a control device, the hydrogen consumption device is provided with a detachment mechanism for attaching and detaching the hydrogen tank to and from the hydrogen consumption device; the detachment mechanism includes a motor that controls the attachment and detachment of the hydrogen tank to and from the hydrogen consumption device, and a hydrogen tank biasing mechanism that transmits a biasing force to the hydrogen tank; The control device performs stop control, stopping control of the motor of the detachment mechanism, when an abnormality is detected in at least one of the hydrogen tank and the hydrogen consumption device while the hydrogen tank is connected to the hydrogen consumption device and hydrogen is being supplied from the hydrogen tank to the hydrogen consumption device.

2. the detachment mechanism has a locking portion that locks the hydrogen tank in a predetermined position when restricting movement of the hydrogen tank, the control device performs lock control to lock the hydrogen tank using the lock unit when an abnormality is detected in at least one of the hydrogen tank and the hydrogen consumption device, 2. The hydrogen supply system according to claim 1, wherein the control device performs the stop control after performing the lock control.

3. the detachment mechanism has a detachment machine that can detach the hydrogen tank, the desorber has a movable part that moves the hydrogen tank by controlling the motor, and a fitting part that fits with the hydrogen tank, the movable portion has an engaging recess that can engage with the locking portion, The hydrogen supply system according to claim 2 , wherein the locking portion is a locking pin.

4. the hydrogen tank has a first connection portion; the fitting portion has a second connection portion, 4. The hydrogen supply system according to claim 3, wherein when the hydrogen tank is fitted to the fitting portion, the first connecting portion of the hydrogen tank and the second connecting portion of the fitting portion are connected.

5. the first connection portion is an on-off valve, The hydrogen supply system according to claim 4 , wherein the second connecting portion is a push rod.

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