Multi-cylindrical structure supply pipe

Abstract

To provide a multi-cylindrical structure supply pipe capable of efficiently supplying hydrogen, electric power, or the like from one of a fuel cell vehicle and a stationary fuel cell system to the other.SOLUTION: According to a standpoint of the disclosure, there is provided a multi-cylindrical structure supply pipe which includes at least three concentric pipes that couple a stationary fuel cell system that is stationary and an in-vehicle fuel cell system mounted on a fuel cell vehicle. The at least three concentric pipes include: a hydrogen supply pipe which allows hydrogen gas to flow therethrough; a liquid circulation pipe which is disposed to surround an outer periphery of the hydrogen supply pipe and through which a liquid flows outside the hydrogen supply pipe; and an electric wire pipe which is disposed to surround an outer periphery of the liquid circulation pipe and provided with one or more electric wires outside the liquid circulation pipe.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a multi-cylinder structural supply pipe suitable for power supply systems, including fuel cell vehicles and stationary fuel cell systems. [Background technology]

[0002] Fuel cell systems, commonly known as ENE-FARM (registered trademark), are known for installation in homes, factories, etc. In these home fuel cell systems, electricity is generated through stationary fuel cells using hydrogen made from fuels such as city gas and LP gas, and oxygen in the air.

[0003] For such stationary fuel cell systems, power supply systems have been proposed that connect fuel cell vehicles or electric vehicles to supply power during power outages. For example, Patent Document 1 discloses a configuration in which power is supplied to household electrical appliances using the battery of an electric vehicle during a power outage. Patent Document 2 proposes a power supply system that can efficiently supply power to household electrical appliances during a power outage by linking a vehicle having a means for supplying power to the outside of the vehicle with a stationary fuel cell system. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-178241 [Patent Document 2] JP 2006-325392 A Summary of the Invention [Problem to be solved by the invention]

[0005] Current technologies, including those described in the above patent documents, do not yet meet market needs, and the following problems exist. In other words, fuel cell vehicles, which have a power generation mechanism similar to that of stationary fuel cell systems, have a high affinity with power supply systems that include stationary fuel cell systems. However, the prior art, including Patent Document 2, does not specifically clarify the piping structure that is used to supply hydrogen and electricity from one side to the other between the fuel cell vehicle and the stationary fuel cell system, and there is a lot of room for improvement at least in this regard.

[0006] The present disclosure has been made in consideration of the above-mentioned problems as an example, and aims to provide a multi-cylindrical structure supply piping that can efficiently supply hydrogen, electricity, etc. from one of a fuel cell vehicle and a stationary fuel cell system to the other. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, according to one aspect of the present disclosure, there is provided a multi-cylindrical structure supply piping having piping configured in at least three concentric circles that connects a stationary fuel cell system and an on-board fuel cell system mounted on a fuel cell vehicle, the multi-cylindrical structure supply piping including: a hydrogen supply pipe through which hydrogen gas flows; a liquid circulation pipe arranged to surround the outer periphery of the hydrogen supply pipe and through which liquid flows outside the hydrogen supply pipe; and an electric wire piping arranged to surround the outer periphery of the liquid circulation pipe and in which one or more electric wires are provided outside the liquid circulation pipe. Effect of the Invention

[0008] According to the present disclosure, it is possible to efficiently supply the necessary hydrogen and electricity from one of a fuel cell vehicle and a stationary fuel cell system to the other using a single piping structure. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing a power supply system according to an embodiment; [Diagram 2]1 is a schematic diagram showing functional blocks of a power supply system according to an embodiment; [Diagram 3] 2 is a schematic diagram showing an example of a heat exchanger mounted on a fuel cell vehicle according to an embodiment; FIG. [Figure 4] FIG. 2 is a schematic diagram showing a layer structure of a multi-cylinder structure type supply pipe according to an embodiment. [Diagram 5] FIG. 2 is a cross-sectional view of a multi-cylinder structure type supply pipe according to an embodiment. [Figure 6] 4 is a flowchart illustrating a method for operating the power supply system according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Next, preferred embodiments of the present disclosure will be described. In this specification and drawings, components having substantially the same functional configurations are denoted by the same reference numerals, and duplicated explanations will be omitted. In addition, configurations other than those described in detail below may be implemented by appropriately supplementing elemental technologies and configurations related to known stationary fuel cell systems and fuel cell vehicles, including those described in the above-mentioned patent documents.

[0011] <Power supply system 500> A power supply system 500 according to this embodiment is shown in Fig. 1. As can be seen from the figure, the power supply system 500 includes a stationary fuel cell system 200 installed in a home, a factory, or the like, an on-board fuel cell system 300 mounted on a fuel cell vehicle FCV and connectable to the stationary fuel cell system 200 via a multi-cylinder structure type supply piping 100, and an EV power supply system 400 mounted on an electric vehicle EV and connectable to the stationary fuel cell system 200 via a known power supply line el2.

[0012] <Stationary fuel cell system 200> Next, the configuration and functions of a stationary fuel cell system 200 will be described with reference to Figures 1 and 2. Figure 2 is a schematic diagram showing functional blocks of a power supply system according to an embodiment. As can be seen from these figures, the stationary fuel cell system 200 is composed of a first control device 210, a first terminal block 220, a power conditioner 230, a stationary fuel cell unit 240A, a fuel gas tank 240B, a hot water storage tank 250, a storage battery 260, a second terminal block 270, and a hot water supply equipment 280.

[0013] The stationary fuel cell system 200 includes a home fuel cell cogeneration system also called ENE-FARM (registered trademark), and may be installed in, for example, an ordinary home. In the following, the stationary fuel cell system 200 as ENE-FARM (registered trademark) will be described as an example, but the stationary fuel cell system 200 in this embodiment may be installed in other buildings such as factories in addition to ordinary homes.

[0014] The first control device 210 has a function of controlling the operation of the power conditioner 230 and the stationary fuel cell unit 240A, which will be described later. More specifically, the first control device 210 of this embodiment can be a known computer that includes one or more processors (CPUs (Central Processing Units)) and one or more memories communicatively connected to the one or more processors.

[0015] The first terminal block 220 is a connection terminal to which one end of the multi-cylinder structure supply piping 100 described below is connected. The multi-cylinder structure supply piping 100 is supplied with hydrogen and circulating water and is equipped with insulated electric wires, and the first terminal block 220 is configured to distribute these independently to required locations in the stationary fuel cell system 200. The specific structure of the first terminal block 220 is not particularly limited as long as it exhibits the above-mentioned functions, and may use, for example, a piping connection structure known from Japanese Patent Application Laid-Open No. 2004-085372, which discloses a double piping structure, or Japanese Patent Application Laid-Open No. 2003-279435, which discloses a multiple piping structure.

[0016] The power conditioner 230 is a known power conditioner having a function of converting DC power generated by, for example, the stationary fuel cell unit 240A into AC power and supplying it to electrical equipment in the home. The power conditioner 230 in this embodiment may also have a function of converting DC power supplied from the fuel cell vehicle FCV via the multiple cylindrical structure supply piping 100 into AC power and supplying it to electrical equipment in the home.

[0017] The stationary fuel cell unit 240A is a known stationary fuel cell unit that is installed in a home, a factory, etc. An example of such a stationary fuel cell unit 240A is the known fuel cell unit applied to the above-mentioned ENE-FARM (registered trademark). Similarly, for the fuel gas tank 240B, the hot water tank 250, the storage battery 260, and the hot water supply equipment 280, each of the well-known units that can be applied to the above-mentioned ENE-FARM (registered trademark) can be exemplified.

[0018] The second terminal block 270 is a known terminal block that can be connected to the power supply line of the electric vehicle EV. The second terminal block 270 can be, for example, a known terminal block applied to a known plug-in hybrid vehicle or an electric vehicle. This allows the first control device 210 to execute control to supply the necessary power to the storage battery 260 and home electrical equipment from the electric vehicle EV connected by the power supply line el2 via the second terminal block 270 and the power conditioner 230.

[0019] <On-board fuel cell system 300> Next, the configuration and functions of an on-vehicle fuel cell system 300 will be described with reference to Figures 1 to 3. As can be seen from the figures, the on-vehicle fuel cell system 300 in this embodiment includes a second control device 310, a fuel cell stack 320, a fuel gas tank 330, an external connection port 340, and a heat exchanger 350. Note that the fuel cell vehicle FCV in this embodiment may be configured to include, in addition to the on-vehicle fuel cell system 300 described above, known accessories for fuel cell vehicles such as an auxiliary battery, a high-voltage battery, and a DC / DC converter.

[0020] The second control device 310 is configured to have, for example, a function of controlling the above-mentioned fuel cell stack 320. More specifically, the second control device 310 of this embodiment is configured as a computer including one or more processors (CPU (Central Processing Unit)) and one or more memories communicatively connected to the one or more processors. Such a second control device 310 may be configured as one of the well-known ECUs (Electronic Control Units) mounted on a fuel cell vehicle.

[0021] The fuel cell stack 320 is a known fuel cell unit mounted on a fuel cell vehicle FCV, and the fuel gas tank 330 can be, for example, a known hydrogen tank mounted on a fuel cell vehicle FCV.

[0022] The external connection port 340 is configured to include a fuel fill port 341 and one of a second connection port 342 and a third connection port 343. Among these, the fuel fill port 341 is a known fill port for charging the fuel gas tank 330 with high-pressure hydrogen supplied from a known hydrogen station via a pressure reducing valve or the like mounted on the vehicle.

[0023] The second connection port 342 and the third connection port 343 are terminal blocks having a structure similar to that of the above-described first terminal block 220. The first terminal block 220 is configured so that hydrogen, circulating water, and the like supplied via the multi-cylinder structure type supply piping 100 are distributed independently of each other to required locations in the fuel cell vehicle FCV.

[0024] Of these, the second connection port 342 is provided on the fuel cell vehicle FCV separately from the above-mentioned fuel filling port 341. The hydrogen supplied from the fuel cell vehicle FCV to the stationary fuel cell system 200 may be branched after the pressure reducing valve of the above-mentioned fuel filling port 341 and connected to the second connection port 342, for example.

[0025] Furthermore, a known hydrogen discharge port provided in, for example, a fuel cell vehicle FCV may be used as the third connection port 343. In such a case, hydrogen is discharged from the fuel gas tank 330 through the hydrogen discharge port in an emergency or the like, and hydrogen is supplied to the stationary fuel cell system 200 from the third connection port 343 via the multi-cylinder structure supply piping 100 as necessary.

[0026] The heat exchanger 350 has a function of exchanging heat between a liquid (tap water, for example) supplied from the stationary fuel cell system 200 via the multi-cylinder structure supply piping 100 and the cooling water heated by the fuel cell stack 320. More specifically, as shown in Fig. 3, the cooling water heated by cooling the fuel cell stack 320 on the fuel cell vehicle FCV flows into the heat exchanger 350 from a first inlet FCVin. On the other hand, the liquid supplied from the stationary fuel cell system 200 flows into the heat exchanger 350 from a second inlet EVin.

[0027] In this manner, the cooling water that flows into the heat exchanger 350 from the first inlet FCVin is cooled by heat exchange with the liquid supplied from the stationary fuel cell system 200, and then flows out from the first outlet FCVout of the heat exchanger 350. On the other hand, the liquid supplied from the stationary fuel cell system 200 exchanges heat with the heated cooling water in the heat exchanger 350 and is heated, and then flows out from the second outlet EVout of the heat exchanger 350. Then, the liquid flowing out from the second outlet EVout is refluxed to the stationary fuel cell system 200 (for example, the hot water storage tank 250, the hot water supply facility 280, etc.) via the multi-cylindrical structure supply pipe 100.

[0028] <EV power supply system 400> Next, with reference to FIGS. 1 to 2, the configuration and function of the EV power supply system 400 will be described. As can be understood from the figure, the EV power supply system 400 in the present embodiment includes a third control device 410, a high-capacity battery 420, and a third terminal block 430. Note that the electric vehicle EV in the present embodiment may include known equipment for electric vehicles such as an auxiliary battery and a DC / DC converter in addition to the above-described EV power supply system 400.

[0029] The third control device 410 is configured to have functions such as controlling charging and discharging in the above-described high-capacity battery 420. More specifically, the third control device 410 in the present embodiment is configured as a computer including one or more processors (CPUs (Central Processing Units)) and one or more memories communicably connected to the one or more processors. Such a third control device 410 may be configured as one of a known ECU (Electronic Control Unit) or CMU (cell management unit) mounted on an electric vehicle.

[0030] The high-capacity battery 420 supplies the power required for driving the electric vehicle EV and the power required for the stationary fuel cell system 200 under the control of the above-described third control device 410. As such a high-capacity battery 420, various known secondary batteries such as a lithium-ion secondary battery can be applied.

[0031] The third terminal block 430 is a known terminal block that can be connected via a power supply line el2 to the power conditioner 230 and the storage battery 260 of the stationary fuel cell system 200. Note that the third terminal block 430 can be, for example, a known terminal block that is applied to a known plug-in hybrid vehicle or an electric vehicle.

[0032] As described above, the electric vehicle EV in this embodiment is equipped with a high-capacity battery 420 that has a higher capacity than the fuel cell vehicle FCV. Therefore, the third control device 410 cooperates with the first control device 210 and the second control device 310 to store the electric power generated by the fuel cell stack 320 of the fuel cell vehicle FCV in the high-capacity battery 420 via the stationary fuel cell system 200.

[0033] Furthermore, the third control device 410 cooperates with the first control device 210 and the second control device 310 to supply the power required by the fuel cell vehicle FCV and the stationary fuel cell system 200 from the high-capacity battery 420. In other words, in the power supply system 500 of this embodiment, power is stored in the high-capacity battery 420 of the electric vehicle EV, which has the largest storage capacity, so that the power generated by the stationary fuel cell system 200 and the fuel cell vehicle FCV can be stored efficiently and without waste. This makes it possible to secure and efficiently use valuable power, for example, during a disaster or power outage.

[0034] <Multiple cylinder structure supply piping 100> Next, the multi-cylinder structure type supply piping 100 in this embodiment will be described in detail. The multi-cylinder structure type supply piping 100 in this embodiment has at least three concentric pipes (the centers of the openings in each pipe are positioned at approximately the same location) that connect a stationary fuel cell system 200 that is placed at a stationary position and an on-board fuel cell system 300 that is mounted on a fuel cell vehicle FCV.

[0035] More specifically, as shown in Figures 4 and 5, the multi-cylinder structure supply piping 100 of this embodiment has the function of connecting the above-mentioned stationary fuel cell system 200 and vehicle-mounted fuel cell system 300 to pass necessary gases, liquids, etc., and is composed of at least a hydrogen supply pipe 10, a liquid flow pipe 20, and an electrical wire piping 30.

[0036] As can be seen from these figures, hydrogen supply pipe 10 is disposed at the innermost position in multi-cylinder structure type supply pipe 100 and is configured to have the function of distributing hydrogen gas. The material of pipe wall 11 in such hydrogen supply pipe 10 may be a known hydrogen supply pipe, for example, a resin layer provided with a metal reinforcing layer.

[0037] 5 and other figures, in the multi-cylinder structure type supply pipe 100 of this embodiment, a first reinforcing layer 40 made of a first metallic material may be further provided between the hydrogen supply pipe 10 and the liquid circulation pipe 20. Such a first reinforcing layer 40 may be made of a wire material made of a known metal such as copper, aluminum, or a general steel material. By providing this first reinforcing layer 40 between the hydrogen supply pipe 10 and the liquid circulation pipe 20, the wall of the hydrogen supply pipe 10 is further strengthened and leakage from the liquid circulation pipe 20 can be suppressed. If the hydrogen supply pipe 10 itself has a reinforcing structure with sufficient pressure resistance (for example, pressure resistance of about several MPa), the first reinforcing layer 40 may be omitted in the multi-cylinder structure type supply pipe 100 as appropriate.

[0038] As shown in Fig. 4 and other figures, the liquid circulation pipe 20 is disposed so as to surround the outer periphery of the hydrogen supply pipe 10, and is configured to have the function of circulating liquid outside the hydrogen supply pipe 10. As can be seen from Fig. 5, the liquid circulation pipe 20 of this embodiment preferably includes a first reciprocating circulating water pipe 20A for a flow from the stationary fuel cell system 200 to the fuel cell vehicle FCV, and a second reciprocating circulating water pipe 20B that is provided concentrically with the first reciprocating circulating water pipe 20A for a flow from the fuel cell vehicle FCV to the stationary fuel cell system 200. As a result, for example, liquid (tap water, cold water) supplied from the stationary fuel cell system 200 flows through the first reciprocating circulating water pipe 20A to the heat exchanger 350 of the fuel cell vehicle FCV, and the heated liquid after this heat exchange flows through the second reciprocating circulating water pipe 20B to be returned to the stationary fuel cell system 200.

[0039] 5 and other figures, in the multi-cylinder structure type supply piping 100 of this embodiment, a second reinforcing layer 50 made of a second metallic material may be further provided between the first reciprocating circulating water pipe 20A and the second reciprocating circulating water pipe 20B. As such a second metallic material, various known metallic materials such as aluminum, stainless steel, or lead can be used.

[0040] In addition, the second reinforcing layer 50 of the present embodiment may be embedded with metal wiring to which a predetermined current can be applied under the control of at least one of the first control device 210 and the second control device 310. By embedding the metal wiring to which a current can be applied in the second reinforcing layer 50 in this manner, it is possible to configure the second reinforcing layer 50 with a temperature control function. Therefore, for example, the second control device 310 may execute control to apply a predetermined current to the metal wiring in the second reinforcing layer 50 based on the outside air temperature measured by, for example, a temperature sensor (not shown).

[0041] This provides the second reinforcing layer 50 with a function of preventing freezing of the liquid piping in a low-temperature environment such as winter, thereby suppressing freezing of the liquid in the liquid flow pipe 20 in a low-temperature environment such as winter. Therefore, when the second reinforcing layer 50 has a function of preventing freezing, it is preferable that the second metal material is a material different from the first metal material and has a higher electrical resistance than the first metal material.

[0042] Furthermore, in this embodiment, a known heat insulating layer may be interposed on the side of the second reinforcing layer 50 that contacts the liquid circulation pipe 20 (the first reciprocating circulating water pipe 20A side in this example) through which cold water flows. In other words, a heat insulating layer may be interposed between the first reciprocating circulating water pipe 20A and the second reciprocating circulating water pipe 20B. As such a heat insulating layer, a known resin material having heat insulating properties, such as polyvinyl chloride or phenol resin, can be used.

[0043] 5 and other figures, the electric wire piping 30 is disposed so as to surround the outer periphery of the liquid flow pipe 20, and one or more electric wires el1 are provided outside the liquid flow pipe 20. In the figure, the electric wire piping 30 is provided with a plurality of electric wires el1 in the circumferential direction, but a single electric wire el1 may be provided. Furthermore, inside the electric wire piping 30, the spaces between the plurality of electric wires el1 may be filled with various known insulating materials, such as epoxy resin or silicone rubber.

[0044] The electric wire el1 in the electric wire piping 30 of this embodiment is configured to electrically connect, for example, a battery (not shown) or a fuel cell stack 320 mounted on a fuel cell vehicle FCV to a power conditioner 230 or a storage battery 260 of the stationary fuel cell system 200. As a result, the first control device 210 and the second control device 310 can supply, for example, electric power obtained from the fuel cell stack 320 of the fuel cell vehicle FCV to the stationary fuel cell system 200 via the electric wire el1 of the electric wire piping 30. Furthermore, the first control device 210 and the second control device 310 may perform control to supply necessary electric power to the fuel cell vehicle FCV from, for example, the storage battery 260 of the stationary fuel cell system 200 via the electric wire el1 of the electric wire piping 30.

[0045] <How the power supply system works> Next, an example of an operation method of the power supply system 500 using the multi-cylinder structure type supply piping 100 of this embodiment will be described with reference to Fig. 6. The operation method described below is executed by at least one of the first control device 210 and the second control device 310 described above. In this case, when one of the first control device 210 and the second control device 310 serves as a main control device and controls the above operation methods in an integrated manner, the other control device functions as a sub-control device. In the following, a case in which the first control device 210 functions as a main control device will be described as an example.

[0046] That is, a user who uses the multi-cylindrical structure type supply piping 100 connects a stationary fuel cell system 200 and a fuel cell vehicle FCV with the multi-cylindrical structure type supply piping 100. Then, in step 1, it is detected whether the multi-cylindrical structure type supply piping 100 is connected to both the stationary fuel cell system 200 and the fuel cell vehicle FCV.

[0047] If it is determined in step 1 that the multi-cylinder structure type supply piping 100 is connected, then in step 2 it is determined whether or not hydrogen is required by the stationary fuel cell unit 240A via the fuel cell vehicle FCV. At this time, for example, in the event that the hydrogen supply from the fuel gas tank 240B is cut off due to a disaster such as an earthquake, the first control device 210 may determine that hydrogen is required by the stationary fuel cell unit 240A via the fuel cell vehicle FCV.

[0048] If it is determined in step 2 that hydrogen is required by the stationary fuel cell unit 240A via the fuel cell vehicle FCV, then in the following step 3A, the first control device 210, for example, executes control to supply hydrogen from the fuel cell vehicle FCV to the stationary fuel cell system 200 via the multi-cylinder structure supply piping 100. This makes it possible to operate the stationary fuel cell unit 240A even when hydrogen cannot be supplied from the fuel gas tank 240B to the stationary fuel cell unit 240A for some reason.

[0049] On the other hand, if it is determined in step 2 that hydrogen is not required by the stationary fuel cell unit 240A via the fuel cell vehicle FCV, then in the following step 3B it is determined whether or not power generation is required by the fuel cell vehicle FCV. At this time, for example, the first control device 210 may determine that power generation is required by the fuel cell vehicle FCV when, for example, the storage battery 260 needs to be quickly charged or when power needs to be stored in the electric vehicle EV.

[0050] Then, if it is determined in step 3B that power generation is required in the fuel cell vehicle FCV, then, for example, the first control device 210 cooperates with the second control device 310 to execute control for operating the fuel cell stack 320 in the fuel cell vehicle FCV to generate power in the subsequent step 4. In parallel with this, the first control device 210 executes control for supplying the power generated in the fuel cell stack 320 to a desired device (such as the power conditioner 230 or the high-capacity battery 420 of the electric vehicle EV) via the multiple cylindrical structure type supply piping 100.

[0051] In the next step 5, the first control device 210 controls the supply of liquid (tap water) from the stationary fuel cell system 200 to the heat exchanger 350 of the fuel cell vehicle FCV via the multi-cylindrical structure type supply piping 100. As a result, the liquid (tap water) supplied from the stationary fuel cell system 200 is converted into hot water by heat exchange in the heat exchanger 350, and is returned to the stationary fuel cell system 200 again via the multi-cylindrical structure type supply piping 100 and stored in the hot water storage tank 250 or the like.

[0052] Then, in step 6, the first control device 210 determines whether the processing in the fuel cell vehicle FCV has been completed. If it is determined in step 6 that all processing in the fuel cell vehicle FCV has been completed, the operation method of this embodiment ends. On the other hand, if it is determined in step 6 that all processing in the fuel cell vehicle FCV has not yet been completed, the process returns to step 2 and the above-mentioned processing is executed again.

[0053] In this manner, according to the multi-cylindrical structure supply piping and power supply system and its operating method of this embodiment, it is possible to efficiently supply the necessary hydrogen and electricity from one side of the fuel cell vehicle and the stationary fuel cell system to the other side using a single piping structure.

[0054] The above-described embodiment is a preferred example of the present disclosure, and new structures and controls may be realized by appropriately combining the elements of the embodiment without departing from the spirit of the present disclosure. It is clear that a person with ordinary knowledge in the technical field to which the present disclosure pertains can come up with various modified or amended examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure.

[0055] For example, in the above-described embodiment, a relatively low-temperature liquid flows through the first reciprocating circulating water pipe 20A of the multi-cylinder structure-type supply piping 100, and heated liquid after heat exchange flows through the second reciprocating circulating water pipe 20B. However, the present disclosure is not limited to the above-described embodiment, and a relatively high-temperature liquid may flow through the first reciprocating circulating water pipe 20A, and a relatively low-temperature liquid may flow through the second reciprocating circulating water pipe 20B. [Explanation of symbols]

[0056] 500 Power Supply System 400 EV Power System 300 Vehicle fuel cell system 200 Stationary Fuel Cell System 100 Multi-cylinder structure supply piping 10 Hydrogen piping 20 Liquid flow pipe 30 Electrical wiring and piping 40 First reinforcing layer 50 Second reinforcing layer FCV fuel cell vehicle EV Electric Vehicle

Claims

1. A multi-cylindrical structure type supply pipe having at least three concentric pipes connecting a stationary fuel cell system and an on-board fuel cell system mounted on a fuel cell vehicle, a hydrogen supply pipe through which hydrogen gas flows; a liquid flow pipe that is disposed so as to surround an outer periphery of the hydrogen supply pipe and through which a liquid flows outside the hydrogen supply pipe; an electric wire pipe arranged to surround an outer periphery of the liquid flow pipe and having one or more electric wires provided outside the liquid flow pipe; A multi-cylinder structure type supply pipe comprising:

2. a first reinforcing layer made of a first metal material is further provided between the hydrogen supply pipe and the liquid circulation pipe; 2. The multi-cylinder structure type supply pipe according to claim 1.

3. The liquid flow pipe is a first reciprocating circulating water pipe for a flow from the stationary fuel cell system toward the fuel cell vehicle; a second reciprocating circulating water pipe that is provided concentrically with the first reciprocating circulating water pipe and that flows from the fuel cell vehicle toward the stationary fuel cell system, 3. The multi-cylinder structure type supply pipe according to claim 2.

4. A second reinforcing layer made of a second metal material is further provided between the first reciprocating circulating water pipe and the second reciprocating circulating water pipe.

4. The multi-cylinder structure type supply pipe according to claim 3.

5. The second metal material is a material different from the first metal material and has a higher electrical resistance than the first metal material.

5. The multi-cylinder structure type supply pipe according to claim 4.

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