JP2005353402A - Fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell system capable of eliminating electrostatic charge deposited on gas pipes appropriately. <P>SOLUTION: A fuel cell system 1 using resin for a gas pipe 51 includes a discharging means 50 that contacts to the gas pipe 51 to ground this. The discharging means 50 is fixed at the inside-upper portion of the gas pipe 51, is extended to the outside of the gas pipe 51, and has metals 70, 62 to be grounded. The gas pipe 51 is applied to such a pipe 12 for exhausting an oxide gas exhausted from a fuel cell 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel cell system using a resin for gas piping.

In the fuel cell system, a fuel gas typified by hydrogen gas and an oxidizing gas typified by air are supplied to the fuel cell stack through a gas pipe, and a resin is used as an attachment part to the fuel cell stack as the gas pipe. Those are known (for example, see Patent Document 1). In view of weight reduction and corrosion resistance of the entire system, it is also considered that the gas pipe is formed of a resin.
JP-A-8-203553 (FIG. 1)

  However, if resin is used for the gas pipe, static electricity is likely to be generated inside the gas pipe due to the gas flow, and the generated static electricity may adversely affect the components of the system.

  An object of the present invention is to provide a fuel cell system capable of appropriately removing static electricity generated in a gas pipe.

  The fuel cell system of the present invention is a fuel cell system using a resin in a gas pipe, and is provided with a static elimination means that contacts the gas pipe and grounds it.

  According to this structure, since the static elimination means is provided in contact with the gas pipe, static electricity generated in the gas pipe can be appropriately eliminated. Here, a fuel cell vehicle is widely known as a device equipped with a fuel cell system. In this case, the static elimination means can ground the gas piping to, for example, the vehicle body.

  In this case, it is preferable that the static elimination means has a conductor provided inside the gas pipe and extending to the outside of the gas pipe to ground it.

  According to this configuration, the static electricity generated in the gas pipe is likely to be charged inside the gas pipe mainly due to the gas flow. However, as described above, a conductor serving as a static elimination means is provided inside the gas pipe. Since it extends to the outside, static electricity can be reliably eliminated. In addition, as a conductor, a carbon film having high conductivity can be used in addition to a metal.

  In this case, it is preferable that the part located inside the gas pipe of the conductor is provided in the upper part in the direction of gravity.

  According to this configuration, when a gas containing a liquid flows through the gas pipe, the liquid easily flows through the lower part of the gas pipe due to gravity. In this case, since the conductor is provided at the upper part of the gas pipe, the liquid conductor It is possible to suitably avoid contact with. Thereby, corrosion of a conductor can be prevented suitably. In particular, when the gas pipe is a discharge pipe that discharges gas from the fuel cell as described later, this is useful in relation to the generated water.

  In these cases, it is preferable that the static eliminating means is in contact with the gas pipe over substantially the entire length.

  According to this configuration, it is possible to prevent static electricity from being partially discharged to the gas pipe.

  In these cases, the gas piping is configured by connecting a plurality of piping parts by a connecting part, and the connecting part has conductivity, and also serves as at least a part of the static elimination means. preferable.

  According to this structure, the connection part which connects piping parts can be utilized effectively as a static elimination means. When there is a need to bend or change the size of the gas piping due to the installation space of the gas piping, etc., use the connecting part provided at the bent or size-changed location to properly remove the charge from the gas piping. be able to.

  Another fuel cell system of the present invention is a fuel cell system in which a resin is used for a gas pipe, wherein the gas pipe and the structure are connected by a conductive member.

  According to this configuration, since the gas pipe is connected to the structure via the conductive member, static electricity generated in the gas pipe can be appropriately eliminated. Here, a fuel cell vehicle is widely known as a device equipped with a fuel cell system. In this case, the conductive member can ground the gas pipe to, for example, a vehicle body or a fuel cell stack as a structure. The fuel cell system can also be applied to, for example, a cogeneration system using the fuel cell for stationary use. In the case of a home or commercial cogeneration system, a conductive member connected to various structures including a building may be connected to the gas pipe. As the conductive member, not only metals but also highly conductive carbon films can be used.

  In this case, it is preferable that the conductive member is provided inside the gas pipe, and is extended to the outside of the gas pipe and connected to the structure.

  According to this configuration, similarly to the above, since the conductive member is provided inside the gas pipe that is easily charged with static electricity, the static electricity can be reliably eliminated.

  In this case, it is preferable that the part located inside the gas piping of the conductive member is provided in the upper part in the direction of gravity.

  According to this configuration, similarly to the above, corrosion of the conductive member can be suitably prevented.

  In these cases, it is preferable that the conductive member is in contact with the gas pipe over substantially the entire length thereof.

  According to this configuration, it is possible to prevent static electricity from being partially discharged to the gas pipe as described above.

  In these cases, the gas pipe is configured by connecting a plurality of pipe parts by a connecting part, and the connecting part has conductivity, and also serves as a part of the conductive member. preferable.

  According to this configuration, similarly to the above, it is possible to appropriately neutralize the gas piping by effectively using the connecting portion that connects the piping portions.

  In these cases, the gas pipe is preferably a fuel system gas pipe through which fuel gas is connected to a pipe through which oxidant gas flows or an oxygen system gas pipe through which oxidant gas is connected to a pipe through which fuel gas flows. . In this case, the fuel system gas pipe or the oxygen system gas pipe may be a gas pipe provided in a discharge system for gas discharged from the fuel cell.

  According to this configuration, since static electricity generated in the gas pipe is neutralized as described above, the influence of static electricity is suitably applied even to a gas pipe in which fuel gas and oxidizing gas are mixed. It can be avoided. The fuel gas is, for example, hydrogen, and the oxidizing gas is, for example, oxygen or air.

  Another fuel cell system of the present invention is a fuel cell system using a resin in a gas pipe, and has a fluid pipe through which a fluid containing moisture flows. The gas pipe is connected to the fluid pipe, and the fluid pipe is connected to the fluid pipe. At least moisture can be introduced.

  According to this configuration, the static electricity generated in the gas pipe is dispersed and released into the gas atmosphere in the gas pipe when a fluid containing moisture flows into the gas pipe from the fluid pipe. Thereby, since the charged potential of the gas pipe is lowered, it is possible to appropriately remove static electricity. Here, the fluid pipe may be a pipe provided in the gas discharge system as will be described later. Of course, the fluid pipe may be a pipe that actively flows a fluid containing moisture exclusively for static elimination. As described above, the fuel cell in the fuel cell system can be stationary, and the fuel cell system can be incorporated into a part of the cogeneration system.

  In this case, the fluid pipe is a pipe provided in a discharge system for the fuel gas discharged from the fuel cell, and the gas pipe is a pipe provided in a discharge system for the oxidizing gas discharged from the fuel cell. ,preferable.

  According to this configuration, the fluid flowing through the fluid piping includes the generated water generated by the reaction of the fuel cell, and the water as the generated water appropriately removes the gas piping provided in the oxidizing gas discharge system. can do.

  In this case, it further includes a circulation pipe for supplying the fuel gas discharged from the fuel cell to the fuel cell again, and the fluid pipe is a pipe that is branched and connected to the circulation pipe and allows the fluid to flow into the gas pipe. preferable.

  According to this configuration, the fuel gas flowing through the circulation pipe may contain impurities, but it can be discharged from the fluid pipe together with moisture and flow into the gas pipe. For this reason, it is possible to appropriately neutralize the gas pipe while removing impurities. In addition, it is preferable that a purge valve that opens and closes the fluid pipe is provided, and the fluid that has passed through the purge valve flows into the gas pipe.

  Similarly, a circulation pipe for supplying the fuel gas discharged from the fuel cell to the fuel cell again, and a gas-liquid separator interposed in the circulation pipe and separating water from the fuel gas flowing through the circulation pipe, The fluid pipe is preferably a pipe that is connected to the gas-liquid separator and allows the water separated by the gas-liquid separator to flow into the gas pipe.

  According to this configuration, although the fuel gas flowing through the circulation pipe includes generated water, the fuel gas and the water as the generated water are separated from each other by the gas-liquid separator, so the fuel separated by the gas-liquid separator Gas can be supplied again to the fuel cell via the circulation line. Further, the water separated by the gas-liquid separator can be made to flow into the gas pipe and can be effectively used for static elimination of the gas pipe.

  In this case, it is preferable to further include a static elimination means for contacting the gas pipe and grounding it.

  According to this configuration, since the static elimination effect by the static elimination means acts on the gas pipe in addition to the static elimination effect due to moisture, static electricity generated in the gas pipe can be reliably eliminated.

  According to the fuel cell system of the present invention, when resin is used for gas piping, static electricity generated in the resin can be appropriately eliminated, and stability and reliability are improved in addition to weight reduction of the entire system. Is possible.

  Hereinafter, a fuel cell system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. This fuel cell system has a structure in which resin is used for a gas pipe and static electricity generated in the gas pipe can be appropriately removed. In the following, a fuel cell vehicle will be described as an example of a device equipped with a fuel cell system. First, a mode in which the gas pipe is neutralized by allowing moisture to flow into the gas pipe will be described.

  As shown in FIG. 1, a fuel cell system 1 includes a solid polymer electrolyte fuel cell 2 having a stack structure in which a large number of cells are stacked. The fuel cell 2 generates electric power upon receiving supply of oxygen gas (air) as an oxidizing gas and hydrogen gas as a fuel gas.

  The oxygen gas piping system 3 of the fuel cell system 1 includes a supply piping 11 for supplying oxygen gas to the fuel cell 2 and a discharge piping 12 for discharging oxygen off-gas discharged from the fuel cell 2 to the outside. Have. The supply pipe 11 is provided with a compressor 14 that takes in oxygen gas in the atmosphere via a filter 13, and a humidifier 15 that humidifies oxygen gas pumped by the compressor 14.

  The humidifier 15 is also disposed on the discharge pipe 12 and exchanges moisture between the oxygen gas and the oxygen off-gas that are pumped. The oxygen gas after the moisture exchange is sent to the fuel cell 2 through the supply pipe 11 and used for power generation in the fuel cell 2. The discharge pipe 12 is a pipe provided in the oxygen gas discharge system, and a back pressure adjusting valve 16 that adjusts the pressure of the oxygen gas in the fuel cell 2 is provided between the humidifier 15 and the fuel cell 2. It is arranged. The oxygen off-gas flowing through the discharge pipe 12 passes through the back pressure regulating valve 16 and is subjected to moisture exchange by the humidifier 15 and is finally exhausted into the atmosphere outside the system as exhaust gas.

  The hydrogen gas piping system 4 of the fuel cell system 1 includes a high-pressure tank 21 as a hydrogen supply source that stores high-pressure hydrogen gas, a supply pipe 22 that supplies the hydrogen gas in the high-pressure tank 21 to the fuel cell 2, and the fuel cell 2. A circulation pipe 23 for returning the hydrogen off-gas (unreacted hydrogen gas) discharged from the gas to the supply pipe 22, a hydrogen pump 24 for returning the hydrogen off-gas in the circulation pipe 23 to the supply pipe 22, and a branch connection to the circulation pipe 23 And a discharge pipe 25 having a downstream end connected to the oxygen-based discharge pipe 12.

  A regulator 27 that adjusts the pressure of new hydrogen gas from the high-pressure tank 21 is interposed on the upstream side of the supply pipe 22, and the circulation pipe 23 is connected to the junction A on the downstream side of the regulator 27. A mixed gas composed of new hydrogen gas and hydrogen off-gas merged at the merge point A is supplied to the fuel cell 2. On the downstream side of the hydrogen pump 24 in the circulation pipe 23, a check valve 28 is interposed so that the hydrogen off gas in the circulation pipe 23 supplied again to the fuel cell 2 does not flow backward.

  A gas-liquid separator 30 that separates moisture from the hydrogen off-gas flowing through the circulation pipe 23 is interposed on the upstream side of the hydrogen pump 24 in the circulation pipe 23. The fluid flowing through the circulation pipe 23 includes hydrogen off-gas discharged from the fuel cell 2 and generated water generated by an electrochemical reaction in the fuel cell 2. In the gas-liquid separator 30, the water as the generated water is separated from the hydrogen off gas. The hydrogen off-gas separated by the gas-liquid separator 30 reaches the confluence A by the hydrogen pump 24, while the water separated by the gas-liquid separator 30 is discharged from the fluid pipe 32 through the drain valve 31 to the oxygen-based discharge pipe. 12 is discharged. The fluid pipe 32 has an upstream end connected to the drain valve 31 of the gas-liquid separator 30 and a downstream end connected to the oxygen-based discharge pipe 12, and removes the water separated by the gas-liquid separator 30. It functions as a pipe that flows in.

  The discharge pipe 25 is provided with a purge valve 33 that functions as a shut valve for opening and closing the pipe. By appropriately opening the purge valve 33 when the fuel cell system 1 is in operation, impurities in the hydrogen off-gas are discharged together with the hydrogen off-gas through the discharge pipe 25 to the oxygen-based discharge pipe 12. By providing the discharge pipe 25, the concentration of impurities in the hydrogen offgas can be lowered, and the concentration of hydrogen in the hydrogen offgas circulated can be increased. Although the gas-liquid separator 30 is provided in the fluid flowing through the discharge pipe 25, moisture is contained in addition to this kind of impurities. That is, the discharge pipe 25 functions as a fluid pipe through which a fluid containing moisture flowing through the discharge pipe 25 flows into the oxygen-based discharge pipe 12.

  Various gas pipes (11, 12, 22, 23, 25, 32) used in the fuel cell system 1 are formed using a resin in consideration of weight reduction of the entire system. When the gas pipe is a resin pipe, static electricity is likely to be generated on the inner surface of the gas pipe due to the gas flow. In particular, a gas pipe that can mix oxygen gas and hydrogen gas needs to have a system that removes the influence of static electricity. Therefore, in the present embodiment, as described above, the oxygen-based discharge pipe 12 is a resin pipe, and in order to remove static electricity generated in the discharge pipe 12 by flowing moisture into the resin pipe, hydrogen gas is supplied to the discharge pipe 12. The discharge pipe 25 and the fluid pipe 32 of the discharge system are connected.

  As described above, according to the fuel cell system 1 of the present embodiment, since moisture flows into the oxygen-based discharge pipe 12 from each of the discharge pipe 25 and the fluid pipe 32, static electricity generated in the discharge pipe 12 is discharged. It can be dispersed and released into the oxygen off-gas atmosphere in the pipe 12. Thereby, since the charging potential of the discharge pipe 12 is lowered, static electricity generated in the discharge pipe 12 can be appropriately eliminated. In this case, for example, both the gas pipes (25, 32) are connected to a predetermined pipe by connecting the fluid pipe 32 to the upstream side of the oxygen-based discharge pipe 12, and connecting the hydrogen-type discharge pipe 25 to the downstream side of the discharge pipe 12. By connecting to the discharge pipe 12 at a distance, the discharge pipe 12 may be configured to be neutralized in a wide range.

  Note that the entire oxygen-based discharge pipe 12 can be formed using a resin, or may be partially formed using a resin. When a part of the discharge pipe 12 is formed using a resin, the pipes (25, 32) that perform the above-described hydrogen-based charge removal function are provided in the discharge pipe 12 so that moisture flows into the resin part. It is preferable to connect. In addition, a separate fluid pipe that actively flows a fluid containing moisture exclusively for static elimination may be connected to the oxygen-based discharge pipe 12. In the description of the fuel cell system 1 described above, configurations such as a silencer and a diluter that are generally interposed in the oxygen-based discharge pipe 12 are omitted, but these components are incorporated in the fuel cell system 1. Needless to say, it can be incorporated.

  Next, the fuel cell system 1 according to the second embodiment will be described with reference to FIGS. 1 to 4 focusing on differences from the first embodiment. The fuel cell system 1 according to the present embodiment uses at least the oxygen-based discharge pipe 12, the hydrogen-based discharge pipe 25, and the fluid pipe 32 as resin pipes, and uses these resin pipes (12, 25, 32) of the fuel cell vehicle. A neutralizing means 50 for grounding the vehicle body is provided. Hereinafter, the three resin pipes (12, 25, 32) will be collectively referred to as a gas pipe 51.

  In general, since the gas pipe 51 in the fuel cell vehicle is provided in a limited installation space, there is a bend as well as a straight portion as shown in FIG. FIG. 2A is a plan view of the gas pipe 51 extending in the front-rear direction of the fuel cell vehicle, and FIG. 2B is a right side view thereof. As shown in the figure, for example, the gas pipe 51 is configured by connecting a plurality (three) of pipe sections 61 through which gas flows by a plurality of (two) connecting sections 62 provided at a bent portion. The

  As shown in FIG. 3, the pipe portion 61 of the gas pipe 51 is formed in a cylindrical shape with resin, and a mounting groove 63 for inserting the metal plate 70 is formed in a portion on the inner peripheral surface side thereof. The attachment groove 63 is formed in a part of the inner wall of the pipe part 61 in the circumferential direction, for example, by extrusion molding so as to extend over the entire length of the pipe part 61. The positions of the mounting groove 63 and the metal plate 70 in the gas pipe 51 correspond to the upper part in the direction of gravity.

  The metal plate 70 has corrosion resistance such as aluminum and the like by a flange 71 that is held in the attachment groove 63 and is prevented from falling out of the attachment groove 63, and a main body 72 that faces a space serving as a flow path in the pipe portion 61. It is integrally formed of a metal with high electrical conductivity. Since the main body 72 of the metal plate 70 is provided above the gas pipe 51, the metal plate 70 is suitably prevented from being corroded by moisture such as generated water that easily flows through the lower part of the gas pipe 51. In this way, the metal plate 70 provided in contact with the gas pipe 51 over substantially the entire length of the gas pipe 51 and in a state in which the gas pipe 51 is prevented from dropping functions as a part of the charge removal means 50 with respect to the gas pipe 51. Instead of the metal plate 70, a highly conductive conductor such as a carbon film can be used.

  FIG. 4 is a cross-sectional view showing the structure around the connecting portion 62 of the gas pipe 51. As shown in the figure, the connecting part 62 that connects the two pipe parts 61 (61a, 61b) is formed of a conductive metal ring. The metal ring 62 includes an upstream ring 81 fixed to the upstream piping portion 61a and a downstream ring 82 fixed to the downstream piping portion 61b. The upstream ring 81 is fixed so as to be fitted to the outer periphery of the end of the piping part 61a. A part of the inner peripheral surface of the upstream ring 81 is in contact with the outer peripheral surface of the flange portion 71 of the metal plate 70, and a part of the upstream ring 81 protrudes from the end portion of the pipe portion 61a.

  The downstream ring 82 is fixed so as to be fitted into the inner periphery of the end portion of the piping portion 61b. One end of the downstream ring 82 is in contact with the end of the metal plate 70 and the other end projects from the end of the pipe portion 61b. Then, the projecting portion of the downstream ring 82 is fitted inside the projecting portion of the upstream ring 81 so that the both 81 and 82 are connected. In this connected state, the flow path of the upstream pipe section 61a and the flow path of the downstream pipe section 61b communicate with each other, and the upstream metal plate 70 and the downstream metal plate 70 connect the metal ring 62 to each other. It is connected so that electricity can be passed through.

  Reference numeral 85 in the drawing is an O-ring provided on the outer periphery of the downstream ring 82, and the O-ring 85 is connected between the downstream ring 82 and the upstream ring 81 (that is, between the piping portions 61) in the connected state. It is sealed. Although not shown, in this connected state, the attachment portion 86 provided in the downstream piping portion 61b and the upstream ring 81 are fixed by a rubber band. As schematically shown, a metallic bracket 102 for installing the gas pipe 51 on the vehicle body 101 of the fuel cell vehicle is provided in contact with the upstream ring 81. That is, the metal ring 62 functions as a part of the static elimination means 50, and cooperates with the metal plate 70 to form a conductor provided inside the gas pipe 51 and extending to the outside. Is grounded to the vehicle body 101. In other words, the metal ring 62 and the metal plate 70 function as a conductive member that connects the gas pipe 51 to the vehicle body 101 that is a structural body.

  As described above, according to the fuel cell system 1 of the present embodiment, since the static elimination means 50 that contacts the gas pipe 51 and grounds it to the vehicle body 101 is provided, it is generated in the gas pipe 51 by the gas flow. Static electricity can be removed appropriately. In particular, static electricity generated in the gas pipe 51 is likely to be charged on the inner surface of the gas pipe 51. However, since the metal plate 70 which is a part of the static elimination means 50 is provided in this portion, the static electricity is surely eliminated. can do. In addition, since the metal plate 70 is provided over substantially the entire length of the gas pipe 51, it is possible to prevent static electricity from being partially discharged to the gas pipe 51.

  In the case where the connecting portion 62 (metal ring) is not used as the gas pipe 51, for example, when the gas pipe 51 is the oxygen-based discharge pipe 12, the metal plate 70 extends from the downstream outlet. May be extended to the outside and brought into contact with the vehicle body 101 to be grounded. Alternatively, the gas pipe 51 may be grounded by connecting a conductive member made of the metal ring 62 and the metal plate 70 to a structure such as a stack of the fuel cell 2 instead of the vehicle body 101. Further, depending on the properties such as the thickness of the gas pipe 51, the gas pipe 51 is not provided in the gas pipe 51 but provided in contact with the outside of the gas pipe 51. Can be grounded.

  In each of the above embodiments, the case where the fuel cell system 1 is mounted on a vehicle has been described. However, the fuel cell system 1 is not limited to this. For example, the fuel cell system 1 can be incorporated into a cogeneration (cogeneration) system with the fuel cell 2 used for stationary use. The cogeneration system can be introduced not only for commercial use but also for home use. Therefore, as the structure for grounding the gas pipe 51, not only the stack of the vehicle body 101 and the fuel cell 2 but also a building such as a residence and various devices installed in association therewith can be used. That is, the structure itself may not be an element that directly constitutes the fuel cell system 1.

1 is a configuration diagram illustrating a configuration of a fuel cell system according to Example 1. FIG. It is a figure which shows the gas piping which concerns on Example 2, (a) is a top view, (b) is a right view. It is sectional drawing of the gas piping cut | disconnected by the II line | wire of FIG. It is sectional drawing which decomposes | disassembles and shows the structure around the connection part of the gas piping which concerns on Example 2. FIG.

Explanation of symbols

  1 fuel cell system, 2 fuel cell, 3 oxygen gas piping system, 4 hydrogen gas piping system (fuel gas piping system), 12 discharge piping (oxygen based gas piping), 23 circulation piping, 25 exhaust piping (fuel system gas piping) , 30 Gas-liquid separator, 32 Fluid piping, 50 Static elimination means, 51 Gas piping, 61 Piping section, 62 Connecting section (conductor, metal ring, conductive member), 70 Metal plate (conductor, conductive member)

Claims (17)

In a fuel cell system using resin for gas piping,
A fuel cell system comprising a charge removing means for contacting the gas pipe and grounding the gas pipe.   2. The fuel cell system according to claim 1, wherein the static elimination unit includes a conductor provided inside the gas pipe and extending outside the gas pipe to ground the gas pipe.   The fuel cell system according to claim 2, wherein a portion of the conductor located inside the gas pipe is provided at an upper portion in a gravity direction.   The fuel cell system according to any one of claims 1 to 3, wherein the static elimination unit is in contact with the gas pipe over substantially the entire length thereof. The gas pipe is constituted by connecting a plurality of pipe parts by a connecting part,
The fuel cell system according to any one of claims 1 to 4, wherein the connecting portion has conductivity, and also serves as a part of the charge removal unit. In a fuel cell system using resin for gas piping,
A fuel cell system in which the gas pipe and the structure are connected by a conductive member.   The fuel cell system according to claim 6, wherein the conductive member is provided inside the gas pipe, and is extended to the outside of the gas pipe and connected to the structure.   The fuel cell system according to claim 7, wherein a portion of the conductive member located inside the gas pipe is provided in an upper part in the direction of gravity.   The fuel cell system according to any one of claims 6 to 8, wherein the conductive member is in contact with substantially the entire length of the gas pipe. The gas pipe is constituted by connecting a plurality of pipe parts by a connecting part,
The fuel cell system according to any one of claims 6 to 9, wherein the connecting portion has conductivity and also serves as a part of the conductive member.   11. The gas pipe according to claim 1, wherein the gas pipe is a fuel system gas pipe through which a fuel gas is connected to a pipe through which an oxidizing gas flows, or an oxygen system gas pipe through which an oxidizing gas is connected to a pipe through which the fuel gas flows. A fuel cell system according to claim 1.   The fuel cell system according to claim 11, wherein the fuel system gas pipe or the oxygen system gas pipe is a gas pipe provided in a discharge system of a gas discharged from the fuel cell. In a fuel cell system using resin for gas piping,
Having fluid piping through which fluid containing moisture flows,
The fuel cell system is configured such that the gas pipe is connected to the fluid pipe so that at least moisture of the fluid can flow from the fluid pipe. The fluid pipe is a pipe provided in a discharge system for fuel gas discharged from the fuel cell,
The fuel cell system according to claim 13, wherein the gas pipe is a pipe provided in a discharge system for oxidizing gas discharged from the fuel cell. A circulation pipe for supplying the fuel gas discharged from the fuel cell to the fuel cell again;
The fuel cell system according to claim 14, wherein the fluid pipe is a pipe that is branched and connected to the circulation pipe and allows the fluid to flow into the gas pipe. A circulation pipe for supplying again the fuel gas discharged from the fuel cell to the fuel cell;
A gas-liquid separator interposed in the circulation pipe and separating water from the fuel gas flowing through the circulation pipe;
The fuel cell system according to claim 14, wherein the fluid pipe is a pipe that is connected to the gas-liquid separator and allows water separated by the gas-liquid separator to flow into the gas pipe. The fuel cell system according to any one of claims 13 to 16, further comprising a static elimination unit that contacts the gas pipe and grounds the gas pipe.

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