JP2009266610A - Fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell system advantageous in controlling a pressure loss of cathode gas. <P>SOLUTION: The fuel cell system is provided with a cathode gas passage 12 which has a sucking port 12i for sucking cathode gas and supplies the cathode gas to a cathode of a stack 3 and a cathode offgas passage 14 having an exhaust port 14p which flows the cathode offgas exhausted from the cathode of the stack 3 after power generation and exhausts the cathode offgas out of a case 50. A reforming unit 2 is arranged in a first piece side space 50y deviated to a side from a central line in a longitudinal direction of a housing chamber 50x of the case 50. The sucking port 12i and the exhausting port 14p, along with the cathode gas passage 12 and the cathode offgas passage 14, are arranged in a second piece side space 50w on the other side in the case 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel cell system that supplies a cathode gas from a cathode gas passage to a cathode of a stack.

  A fuel cell system is generally disposed in a housing having a housing chamber, a reformer that is disposed in the housing chamber of the housing and reforms a fuel material to generate anode gas, and a housing chamber in the housing. The fuel cell stack, the cathode gas passage for supplying the cathode gas to the cathode of the stack with the intake port for sucking the cathode gas, the cathode offgas after power generation discharged from the cathode of the stack and the cathode offgas flowing into the casing And a cathode off-gas passage having an exhaust port for discharging outward.

Patent Document 1 discloses a fuel cell stack in which a plurality of fuel cells are arranged side by side in the vertical and horizontal directions on the same plane, a casing that covers the fuel cell stack via an air flow space, and a fuel cell stack A fuel cell system having a single fan arranged in a planar direction is disclosed. According to this, the fan cover has an intake port provided on one side of the fuel cell stack and an exhaust port provided on the other side of the fuel cell stack. Further, fuel tanks containing liquid fuel such as methanol are stacked on the back side of each fuel cell.
JP 2007-184157 A

  According to the above-described general fuel cell system, there is a limit in reducing the cathode gas flow distance and suppressing the cathode gas pressure loss. Furthermore, according to Patent Document 1, a fuel cell stack is formed in which a plurality of fuel cells are arranged side by side in the vertical and horizontal directions in a grid pattern on the same plane. According to this, although the thickness of the fuel cell stack is reduced, the installation area of the fuel cell stack may be increased. For this reason, there is a limit to shortening the distance through which the cathode gas flows as much as possible. As a result, there is a limit in suppressing the pressure loss of the cathode gas.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fuel cell system that is advantageous in suppressing the pressure loss of the cathode gas.

  A fuel cell system according to the first aspect of the present invention includes: (i) a casing having a storage chamber; and (ii) a reformer disposed in the storage chamber of the casing to reform the fuel raw material to generate anode gas. (Iii) a fuel cell stack disposed in a housing chamber of the casing and having an anode to which anode gas is supplied and a cathode to which cathode gas is supplied; and (iv) a cathode of the stack having an intake port for sucking the cathode gas And (v) a cathode offgas passage having an exhaust port for flowing the cathode offgas after power generation discharged from the cathode of the stack and discharging the cathode offgas to the outside of the housing. (Vi) The direction having the longest length in the direction along the bottom wall portion or the ceiling wall portion of the housing is the longitudinal direction, and the inside of the housing is visually recognized. In the cross-sectional view of the casing cut along the longitudinal direction as described above, the vertical line passing through the center in the longitudinal direction of the casing is the center line, and the housing chamber of the casing is connected to the first one-side space and the first space via the center line. When dividing into two-sided space, the reformer is disposed in the first one-sided space located on one side of the center line in the longitudinal direction of the housing chamber of the housing, and the intake port and the exhaust port are Along with a cathode gas passage having an intake port and a cathode off gas passage having an exhaust port, the cathode gas passage is arranged in a second one-side space located on the other side of the center line in the longitudinal direction of the housing chamber of the housing. To do.

  The housing is a box having a storage chamber for storing the components of the fuel cell system. The reformer is disposed in the housing chamber of the casing, and reforms the fuel material to generate an anode gas for power generation. The fuel material to be reformed may be a gas fuel or a liquid fuel. Specifically, city gas, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas, and the like can be employed. The stack of the fuel cell is disposed in a housing chamber of the casing, and includes an anode to which anode gas is supplied and a cathode to which cathode gas is supplied. In general, the cathode gas may be an oxygen gas or an oxygen-containing gas, such as air. The stack may be a system in which a plurality of sheet-type membrane electrode assemblies are stacked in the thickness direction or a system in which a plurality of tube-type membrane electrode assemblies are incorporated. The cathode gas passage is a passage through which cathode gas before power generation flows toward the cathode of the stack, and has an intake port for sucking the cathode gas.

  The cathode offgas passage is a passage for flowing the generated cathode offgas discharged from the cathode of the stack, and has an exhaust port for discharging the cathode offgas to the outside of the casing.

  In a cross-sectional view of the housing that visually recognizes the inside of the housing, the direction along the bottom wall or ceiling wall of the housing is the longitudinal direction, and the vertical line passing through the center in the longitudinal direction is the center line. The container is arranged in the first one-side space on one side of the center line in the longitudinal direction of the housing chamber of the housing. In contrast, the intake port and the exhaust port, together with the cathode gas passage having the intake port and the cathode off-gas passage having the exhaust port, are on the other side of the center line in the longitudinal direction of the housing chamber of the housing. It is arranged in one side space.

  According to the aspect 1 of the present invention, the length of the cathode gas passage through which the cathode gas flows from the intake port is not provided in both the first one-side space and the second one-side space. The length is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage is suppressed. Accordingly, the length of the cathode offgas passage through which the cathode offgas flows to the exhaust port is suppressed and shortened because it is not disposed in both the first one-side space and the second one-side space. For this reason, the pressure loss of the cathode off-gas passage is suppressed.

  Further, according to the first aspect of the present invention, the cathode gas passage and the cathode off-gas passage can be kept away from the reformer serving as a heat radiation source. For this reason, it is suppressed that the reformer serving as a heat radiation source exerts a thermal influence on the cathode gas passage and the cathode offgas passage. Therefore, the thermal expansion of the volume of the cathode gas flowing through the cathode gas passage is suppressed. Similarly, thermal expansion of the volume of the cathode offgas flowing through the cathode offgas passage is suppressed. Therefore, it is advantageous to reduce power loss of a cathode gas conveyance source such as a pump, a fan, or a blower that conveys the cathode gas to the cathode of the stack. In this case, it can contribute to size reduction of a cathode gas conveyance source.

  A fuel cell system according to the present invention of aspect 2 includes (i) a casing having a storage chamber, and (ii) a reformer that is disposed in the storage chamber of the casing and reforms the fuel material to generate anode gas. (Iii) a fuel cell stack disposed in a housing chamber of the casing and having an anode to which anode gas is supplied and a cathode to which cathode gas is supplied; and (iv) a cathode of the stack having an intake port for sucking the cathode gas A cathode gas passage for flowing a cathode gas directed to the housing, and (v) a casing having a longest length in a direction along a bottom wall portion or a ceiling wall portion of the casing. In the cross-sectional view of the housing cut along the longitudinal direction so as to visually recognize the inside of the housing, the vertical line passing through the center in the longitudinal direction of the housing is the center line, and the housing chamber of the housing is the first through the center line. One side space and second one side sky And the reformer is arranged in a first one-sided space located on one side of the center line in the longitudinal direction of the housing chamber of the housing, and the intake port is a cathode gas having an intake port Along with the passage, it is arranged in a second one-side space located on one side other than the center line in the longitudinal direction of the housing chamber of the housing.

  According to the aspect 2 of the present invention, the length of the cathode gas passage through which the cathode gas flows from the intake port is not provided in both the first one-side space and the second one-side space. The length is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage is suppressed. Furthermore, the cathode gas passage can be kept away from the reformer serving as a heat radiation source. For this reason, it is suppressed that the reformer used as a heat radiation source exerts a thermal influence on the cathode gas passage. Therefore, the thermal expansion of the volume of the cathode gas flowing through the cathode gas passage is suppressed. Therefore, it is advantageous to reduce power loss of a cathode gas conveyance source such as a pump, a fan, or a blower that conveys the cathode gas to the cathode of the stack. In this case, it can contribute to size reduction of a cathode gas conveyance source.

  A fuel cell system according to the present invention of aspect 3 includes (i) a casing having a storage chamber, and (ii) a reformer that is disposed in the storage chamber of the casing and reforms a fuel material to generate an anode gas. (Iii) a fuel cell stack disposed in a housing chamber of the casing and having an anode to which anode gas is supplied and a cathode to which cathode gas is supplied; and (iv) a cathode of the stack having an intake port for sucking the cathode gas And (v) a direction having the longest length in the direction along the bottom wall portion or the ceiling wall portion of the casing is defined as a longitudinal direction. In the cross-sectional view of the housing cut along the longitudinal direction so as to visually recognize the inside of the body, the reformer is disposed in a space on one end side of the stack in the longitudinal direction of the housing chamber of the housing, and , Intake And the cathode gas passage, characterized in that it is arranged in a space on the other end side from the stack in the longitudinal direction of the accommodating chamber of the housing.

  According to the aspect 3 of the present invention, since the cathode gas passage is not extended from one end side to the other end side in the longitudinal direction of the casing, the length of the cathode gas passage through which the cathode gas flows from the intake port. The length is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage is suppressed. Furthermore, according to the third aspect of the present invention, the cathode gas passage can be as far as possible from the reformer serving as a heat radiation source. For this reason, it is suppressed that the reformer used as a heat radiation source exerts a thermal influence on the cathode gas passage. Therefore, the thermal expansion of the volume of the cathode gas flowing through the cathode gas passage is suppressed. Therefore, it is advantageous to reduce power loss of a cathode gas conveyance source such as a pump, a fan, or a blower that conveys the cathode gas to the cathode of the stack. In this case, it can contribute to size reduction of a cathode gas conveyance source.

  According to the third aspect of the present invention, the cathode offgas passage having an exhaust port for flowing the cathode offgas after power generation discharged from the cathode of the stack and discharging the cathode offgas to the outside of the housing is provided. preferable. The exhaust port and the cathode off-gas passage are preferably arranged in a space on the other end side of the longitudinal center line of the stack in the longitudinal direction of the housing chamber of the housing.

  The present invention of aspects 1 to 3 can employ at least one of the following aspects.

  Preferably, a humidifier that humidifies the cathode gas before being supplied to the cathode of the stack is disposed in the housing chamber of the housing. Preferably, the humidifier is kept away from the reformer so that the stack is disposed between the humidifier and the reformer in the longitudinal direction of the housing chamber of the housing. The heat influence which the reformer used as a heat radiation source has on the humidifier is reduced.

  Preferably, a humidifier that humidifies the cathode gas before being supplied to the cathode of the stack is disposed in the housing chamber of the housing. Any humidifier may be used as long as it humidifies the cathode gas. Preferably, the humidifier is kept away from the reformer so that the stack is placed between the humidifier and the reformer. This suppresses the reformer from affecting the humidifier with heat. Therefore, the thermal expansion of the volume of the cathode gas and / or the cathode off gas flowing through the humidifier is suppressed. In this case, the cathode gas carrier source can be further reduced in size.

  Preferably, the cathode gas passage includes an outside air introduction port formed in the housing, an air filter portion communicating with the outside air introduction port, a passage for directing the cathode gas that has passed through the air filter portion to the humidifier, and the cathode gas. And a cathode gas conveyance source for conveying the gas toward the cathode of the stack. Examples of the cathode gas transport source include a pump, a fan, and a blower that transport the cathode gas.

  As described above, according to the first aspect of the present invention, the length of the cathode gas passage for flowing the cathode gas after the power generation reaction is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage is suppressed. Furthermore, the length of the cathode offgas passage through which the cathode offgas after the power generation reaction flows to the exhaust port is suppressed and shortened. As a result, pressure loss in the cathode offgas passage is suppressed. Further, according to the first aspect of the present invention, both the cathode gas passage and the cathode off-gas passage can be as far as possible from the reformer serving as a heat radiation source. For this reason, it is suppressed that the reformer serving as a heat radiation source exerts a thermal influence on the cathode gas passage and the cathode offgas passage. Therefore, the thermal expansion of the volume of the cathode gas flowing through the cathode gas passage is suppressed. Similarly, thermal expansion of the volume of the cathode offgas flowing through the cathode offgas passage is suppressed. Therefore, it is advantageous to reduce power loss of a cathode gas conveyance source such as a pump, a fan, or a blower that conveys the cathode gas to the cathode of the stack. In this case, it can contribute to size reduction of a cathode gas conveyance source.

  According to the aspect 2 of the present invention, the length of the cathode gas passage through which the cathode gas after the power generation reaction flows is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage is suppressed. Furthermore, according to the second aspect of the present invention, the cathode gas passage can be as far as possible from the reformer serving as a heat radiation source. For this reason, it is suppressed that the reformer used as a heat radiation source exerts a thermal influence on the cathode gas passage. Therefore, the thermal expansion of the volume of the cathode gas flowing through the cathode gas passage is suppressed. Therefore, it is advantageous to reduce power loss of a cathode gas conveyance source such as a pump, a fan, or a blower that conveys the cathode gas to the cathode of the stack. In this case, it can contribute to size reduction of a cathode gas conveyance source.

  Further, according to the present invention of aspect 3, the length of the cathode gas passage for flowing the cathode gas after the power generation reaction is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage is suppressed. Furthermore, according to the third aspect of the present invention, the cathode gas passage can be as far as possible from the reformer serving as a heat radiation source. For this reason, it is suppressed that the reformer used as a heat radiation source exerts a thermal influence on the cathode gas passage. Therefore, the thermal expansion of the volume of the cathode gas flowing through the cathode gas passage is suppressed. Therefore, it is advantageous to reduce power loss of a cathode gas conveyance source such as a pump, a fan, or a blower that conveys the cathode gas to the cathode of the stack. In this case, it can contribute to size reduction of a cathode gas conveyance source.

(Embodiment 1)
(overall structure)
A first embodiment of the present invention will be described with reference to FIGS. This embodiment is applied to a stationary fuel cell system that is fixedly installed in a general household, a business shop, a building, or the like. The drawings are merely conceptual diagrams and do not define the details in detail. FIG. 1 schematically shows the concept of a fuel cell system. First, a schematic configuration of the fuel cell system will be described. The fuel cell system has a supply path 1 for reforming a fuel material as an anode gas and supplying it to the anode of the fuel cell, a reformer 2 that can function as an anode gas supply unit, and a fuel cell stack 3. In the supply path 1, from the upstream to the downstream, the fuel raw material source 4, the supply valve 5, the desulfurizer 6, the first pump 7 (fuel raw material transfer source), the valve 8, the reformer 2, the first condenser 9, the inlet The valve 10 and the fuel cell stack 3 are connected.

  The reformer 2 is formed by a reforming section 2a that generates an anode gas by steam reforming a fuel material, and a combustion section 2c that heats the reforming section 2a. A branch path 11 is branched from the upstream of the reforming section 2a of the supply path 1 toward the combustion section 2c.

  The fuel cell stack 3 includes an anode to which an anode gas is supplied, a cathode to which a cathode gas is supplied, and a polymer ion conductive membrane (for example, a fluorine-based or hydrocarbon-based membrane) sandwiched between the anode and the cathode. Proton conducting membrane). The fuel cell may be a system in which a plurality of sheet-type cells are stacked in the thickness direction, or a system in which tube-type cells are assembled.

  A cathode gas passage 12 for supplying cathode gas to the cathode inlet of the stack 3 is provided. The cathode gas passage 12 has an intake port 12i for sucking cathode gas (air). The cathode gas passage 12 is provided with a cathode gas pump 13 (cathode gas carrier source). A cathode offgas passage 14 is provided for discharging cathode offgas from the cathode outlet of the fuel cell. The cathode off gas passage 14 discharges the cathode off gas from the exhaust port 14p to the outside air. As shown in FIG. 2, the cathode offgas passage 14 is provided with a condenser 22 that condenses the cathode offgas. In the gas flow direction of the cathode gas passage 12, the stack 3 is arranged with the humidifier 15 adjacent thereto. The humidifier 15 humidifies the cathode gas before supplying it to the cathode of the stack 3. Here, the humidifier 15 includes a moisture absorption passage through which cathode gas before flowing into the cathode of the stack 3 (dryer than the cathode off gas) flows, and cathode off gas after flowing out from the cathode of the stack 3 (cathode gas before power generation reaction). A humidifying passage through which a relatively wet and high temperature) flows, and a moisture retention film that partitions the moisture absorption passage and the humidifying passage. In the humidifier 15, the cathode off-gas having a higher humidity and higher temperature than the cathode gas gives moisture and heat to the moisture retention film. The cathode gas having a lower humidity and lower temperature than the cathode off gas is humidified and heated by the moisture retention film.

  As shown in FIG. 1, a bypass path 16 extends from the upstream side of the inlet valve 10 in the supply path 1. A bypass valve 17 is provided in the bypass path 16. An anode off-gas passage 19 is provided from the anode outlet 3ap of the stack 3 toward the combustion section 2c of the reformer 2. The anode off gas passage 19 has an outlet valve 20 and a second condenser 21. A first drainage channel 24 extending from the first condenser 9 is connected to a water purifier 28 via a first drainage valve 23. A second drainage channel 26 extending from the second condenser 21 is connected to a water purifier 28 via a second drainage valve 27. A drainage channel 22 c extending from the condenser 22 is connected to a water purifier 28.

  The water generated by the water purifier 28 is supplied to the water tank 25 by a pump (not shown) or gravity. A reforming water passage 40 extends from the water tank 25 toward the inlet 2i of the reforming section 2a. The reforming water passage 40 is provided with a reforming water pump 41 and a reforming water valve 42.

  The startup time of the fuel cell system will be described. At startup, the first pump 7 (conveyance source) is driven to rotate with the supply valve 5 being open and the valve 8 being closed. Then, the gaseous or liquid fuel material of the fuel material source 4 flows into the supply path 1, is desulfurized by the desulfurizer 6, and is supplied to the combustion unit 2 c of the reformer 2.

  When the combustion air pump 33 (conveyance drive source) is driven to rotate, the combustion air is supplied from the air passage 34 to the combustion unit 2c. As a result, the gaseous fuel material is burned in the combustion section 2 c by the air from the air passage 34. The reforming part 2a is gradually heated to a high temperature region by the combustion of the combustion part 2c. When the reforming unit 2a is heated to a high temperature region in this way, the control device opens the valve 8, and the fuel material of the fuel material source 4 is supplied to the reforming unit 2a. At this time, the reforming water pump 41 is driven to rotate and the reforming water valve 42 is opened by the control device. For this reason, the water of the water purifier 28 is supplied to the reforming unit 2a. As a result, the fuel material supplied to the reforming unit 2a is steam reformed by the reforming water. As a result, an anode gas containing hydrogen as a main component (hydrogen, for example, 20 mol% or more) is generated. Thus, the anode gas produced | generated by the reformer 2 reduces a water | moisture content with the 1st condenser 9. FIG. The fuel material to be reformed may be a gas fuel or a liquid fuel. Specifically, city gas, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas and the like can be employed.

  At the beginning of startup, the composition of the anode gas is not always stable. For this reason, at the beginning of startup, the control device closes the inlet valve 10 and the outlet valve 20, but the bypass valve 17 is opened. Therefore, at the beginning of startup, the anode gas is not supplied to the anode of the stack 3, but is supplied to the second condenser 21 via the bypass passage 16 and the bypass valve 17, and after the moisture is reduced by the second condenser 21, The fuel is supplied to the combustion unit 2c and burned. When a predetermined time elapses from the start and the composition of the anode gas is stabilized, the inlet valve 10 and the outlet valve 20 are opened, and the anode gas is supplied to the anode inlet of the stack 3 through the inlet valve 10.

  Further, since the cathode gas pump 13 is driven, the cathode gas supplied from the cathode gas passage 12 flows from the inlet 15i to the humidifier 15 and is humidified by the humidifier 15, and then supplied from the cathode inlet of the stack 3 to the cathode. Is done. In this way, with the load (the load operated by the electric energy of the stack 3) connected to the stack 3, a power generation reaction is performed in the stack 3 by the anode gas and the cathode gas, and electric energy is generated. Since the anode off gas after the power generation reaction may have a combustible component, the anode off gas is discharged from the anode outlet of the stack 3 and flows from the anode off gas passage 19 to the second condenser 21 via the outlet valve 20. After the water is condensed by the two condenser 21, it is supplied to the combustion section 2c, burned, and reused.

  Here, during the power generation operation of the fuel cell system, condensed water is gradually stored in a condenser such as the first condenser 9, the second condenser 21, and the condenser 22. When the first drain valve 23 is opened, the condensed water accumulated in the first condenser 9 is supplied to the water purifier 28 by gravity through the first drain passage 24. When the second drain valve 27 is opened, the condensed water accumulated in the second condenser 21 is supplied to the water purifier 28 by gravity through the second drain path 26. The condensed water accumulated in the condenser 22 is supplied to the water purifier 28 by gravity through the drainage channel 22c. Condensed water collected in the water purifier 28 is generated by the water purifier 28 and purified. Here, when the reforming water pump 41 is driven to rotate and the reforming water valve 42 is opened, the water in the water purifier 28 is supplied to the reforming unit 2a. As a result, the fuel material supplied to the reforming unit 2a is steam reformed by the reforming water. The reforming water used for steam reforming preferably has a high purity.

  As described above, when the stack 3 performs the power generation operation, the stack 3 is heated. When the stack 3 becomes excessively high in temperature, the power generation performance of the stack 3 decreases. Therefore, a stack cooling passage 45 is provided for cooling the stack 3 by flowing a stack coolant through the stack 3 during operation of the fuel cell system. The stack cooling passage 45 is provided with an ion exchanger 46 (first maintenance component). The ion exchanger 46 purifies the stack coolant and improves the electrical insulation of the stack coolant. In addition, when the electrical insulation of the stack coolant decreases, the extraction efficiency of the electric energy extracted from the stack 3 decreases.

(Main part of this embodiment)
Now, the main part of this embodiment will be described. 2 and 3 schematically show a vertical cross section of the fuel cell system. FIG. 2 is a longitudinal sectional view schematically showing a state where the casing 50 is cut along the longitudinal direction (L1 direction) and along the vertical line. FIG. 3 is a vertical cross-sectional view schematically showing a state in which the casing 50 is cut along the width direction (L2 direction) and along the vertical line. Here, the longitudinal direction of the housing 50 (the direction of the arrow L1) means the direction in which the longest dimension extends in the direction along the horizontal direction in the housing 50 having a rectangular parallelepiped shape. The width direction of the housing 50 means a direction that intersects the longitudinal direction of the housing 50 in the direction along the horizontal direction of the housing 50 having a rectangular parallelepiped shape.

  As shown in FIG. 2, the fuel cell system according to the present embodiment includes a casing 50, a reformer 2, and a stack 3. The housing 50 has a bottom wall portion 50b, a ceiling wall portion 50u, and a side surface portion 50t. In FIG. 2, the direction along the bottom wall portion 50b or the ceiling wall portion 50u along the horizontal direction of the housing 50 is defined as the longitudinal direction (arrow L1 direction). The center in the longitudinal direction of the stack 3 (the direction having the longest dimension among the dimensions of the stack 3, the cell stacking direction) is P5.

  As shown in FIG. 2, the storage chamber 50x of the housing 50 includes a large-capacity main storage chamber 51, a compartment 53 that is maintained at a lower temperature than the main storage chamber 51 and has a smaller volume than the main storage chamber 51, And a partition wall 55 that partitions the main storage chamber 51 and the compartment 53. The compartment 53 functions as a maintenance chamber for storing maintenance parts, and is located on the side of the main storage chamber 51. The wall forming the housing 50 functions as a partition wall, and includes a metal wall 50f and a heat insulating layer 50s formed of a heat insulating material provided on the inner surface of the wall 50f. The heat insulating layer 50s has a heat insulating and soundproofing action. In addition, although the housing | casing 50 has comprised square box shape, it is not limited to this.

  As shown in FIG. 2, the compartment 53 has a housing 50 so as to be away from the reformer 2 and the stack 3 in order to avoid a thermal influence from the reformer 2 that can be a heat radiation source together with the stack 3. In the longitudinal direction of the body 50 (arrow L1 direction), it is provided on the end side (the other end side) opposite to the reformer 2. The compartment 53 is located on the other end side of the center 50 of the stack 3 in the housing 50 in the longitudinal direction of the housing 50.

  The partition wall 55 includes a metal plate 55f made of metal (for example, carbon steel, alloy steel, and aluminum alloy) and a heat insulating layer 55s formed of a heat insulating material provided on the inner surface of the metal plate 55f. The heat insulating layer 55s has a heat insulating and soundproofing action. Accordingly, the heat of the main storage chamber 51 that stores the heat radiation source is difficult to be transmitted to the compartment 53, which can contribute to suppressing the temperature rise of the compartment 53. The partition wall 55 may have a structure including an air heat insulating layer 55x.

  According to the present embodiment, as shown in FIG. 2, a metal attachment / detachment panel 56 is attached to the side of the compartment 53 in the casing 50 by a fixture 56 x such as a bolt. When the fixture 56x is removed, the detachable panel 56 is detached from the housing 50 outward. The detachable panel 56 has air permeability, can be detached from and attached to the housing 50, and closes the compartment 53. The desorption panel 56 has a grill 58 that forms an intake port 12i that functions as an outside air introduction port for introducing outside air (air outside the housing 50) functioning as a cathode gas into the inside of the housing 50.

  As shown in FIG. 2, the stack 3 and the humidifier 15 are disposed on the ceiling wall portion 50 u side of the main storage chamber 51 of the housing 50, and are higher than the intermediate position hm in the height direction of the main storage chamber 51. It is arrange | positioned at the upper side and is approaching the ceiling wall part 50u of the housing | casing 50. FIG. The humidifier 15 is disposed on the partition wall 55 side so as to move away from the reformer 2 in the main storage chamber 51.

  As shown in FIG. 2, an air filter portion 66 that functions as a dust reduction portion is provided in the compartment 53 of the housing 50 so as to face the partition wall 55. The air filter portion 66 is fixed to the inner surface 56i of the detachable panel 56 by welding or an unillustrated fixture. The air filter unit 66 has a filter function for reducing dust contained in the outside air as a cathode gas supplied to the cathode of the stack 3.

  As can be understood from FIG. 2, the cathode gas passage 12 has an intake port 12 i as an outside air introduction port formed in the attachment / detachment panel 56 of the housing 50, and an air filter portion 66 communicating with the intake port 12 i as an outside air introduction port. A passage 12f for flowing the cathode gas that has passed through the inside of the air filter portion 66 to the branching portion 77k of the duct 77, a passage 12s for conveying the cathode gas from the branching portion 77k toward the inlet 15i of the humidifier 15, and a passage 12s. And a cathode gas pump 13 (cathode gas carrier source) provided in The passage 12f is constituted by the space of the duct 77 itself.

  As shown in FIG. 2, there is provided a duct 77 having a hollow cylindrical shape that forms an air passage 34 that can supply outside air as cathode gas to the cathode of the stack 3. The duct 77 communicates the back surface 66r side, which is the outlet side of the air filter portion 66, and the portion 68p of the electrical equipment box 68. The electrical equipment box 68 is disposed between the reformer 2 and the partition wall 55 so as to be below the stack 3, and is disposed in the box chamber 68a, which can serve as a passage through which air can pass, and the box chamber 68a. And an electric device 68c that can be a heat radiation source. The electric device 68c includes an inverter that converts the power generated by the fuel cell, a power supply board that is electrically connected to a power supply, and other electric components. The air passage 34 connects the outlet 68m of the electric equipment box 68 and the combustion part 2c.

  As shown in FIG. 2, in a normal time such as when the fuel cell system is operated, the case 66 t functioning as an outer box of the air filter unit 66 is opened with the back plate 66 w held on the back surface of the case 66 t. 75 is closed. Therefore, the air filter part 66 can function as an opening / closing member or a lid member that closes the opening 75 in an openable / closable manner. In this state, the inside of the air filter portion 66 communicates with the opening 75 so that the outside air outside the housing 50 can be introduced to the duct 77 side as the cathode gas. Therefore, in the state where the air filter portion 66 is attached in the housing 50 as shown in FIG. 2, the air inlet 12 i as the outside air inlet of the detachable panel 56, the inside of the air filter portion 66, the opening 75, and the duct 77. Communicates so that outside air can be sucked into the duct 77 side.

  Therefore, when the air pump 33 (combustion air conveyance source) is driven to rotate, the outside air flows into the intake port 12i as the outside air introduction port of the desorption panel 56, the air filter portion 6, the opening 75, the duct 77, and the electric equipment box 68. It flows through the interior, further flows into the passage 34p of the air passage 34 from the outlet 68m of the electrical equipment box 68 to the combustion section 2c, is supplied to the combustion section 2c of the reformer 2 through the passage 34p, and is burned in the combustion section 2c used. In this case, since the electric device 68c that dissipates heat inside the electric device box 68 is cooled by air and overheating of the electric device 68c is suppressed, it is possible to contribute to improving the durability and extending the life of the electric device 68c. Furthermore, since the air supplied to the combustion part 2c of the reformer 2 can be preheated by heat radiation from the electric equipment 68c of the electric equipment box 68, it is advantageous for improving the combustion efficiency in the combustion part 2c.

  As shown in FIG. 2, an exhaust gas outlet 2 k is provided on the ceiling wall 50 u of the housing 50. The exhaust gas combusted in the combustion unit 2c is cooled by the condenser 49 to generate condensed water, and then discharged from the exhaust gas outlet 2k to the outside (upward) of the housing 50. This exhaust gas means the exhaust gas of combustion air combusted in the combustion part 2c, the exhaust gas of combustion fuel, and the exhaust gas after the anode off gas is combusted in the combustion part 2c.

  As shown in FIG. 2, when the cathode gas pump 13 (cathode gas transport source) is driven to rotate, the air in the duct 77 is supplied to the inlet 15i of the humidifier 15 through the passage 12s of the cathode gas passage 12, and is humidified. After being humidified by the vessel 15, it is supplied to the cathode of the stack 3 and used for power generation reaction.

  According to the present embodiment, as shown in FIG. 3, the cathode offgas having a high humidity after the power generation reaction is discharged from the cathode outlet of the stack 3 and then flows into the moisture absorption passage of the humidifier 15. Is discharged into the cathode offgas passage 14 from the outlet 15p. As shown in FIG. 3, the cathode off-gas passage 14 includes a passage 14f from the outlet 15p of the humidifier 15 to the inlet 22i of the condenser 22, and a passage 14s from the outlet 22p of the condenser 22 to the exhaust port 14p of the side surface portion 50m. And. As can be understood from FIG. 3, the passage 14 s extends in the horizontal direction (that is, toward the side surface portion 50 m of the housing 50 so as to be away from the electric equipment box 68 and to be a short flow path toward the outside air. It extends from the condenser 22 along the arrow L2 direction which is the width direction of the housing 50. Then, the cathode off-gas discharged from the outlet 15p of the humidifier 15 and having higher humidity and higher temperature than the cathode gas flows through the passage 14f extending downward from the humidifier 15, and then to the condenser 22. Finally, it is cooled by the condenser 22 and the moisture contained in the cathode off gas is condensed as condensed water. The cathode off gas that has been dried by generating condensed water flows in the lateral direction through the passage 14s and is discharged from the exhaust port 14p to the outside through the exhaust port 14p of the side surface portion 50m of the housing 50. The side surface portion 50 m extends in a direction intersecting with the partition wall 55.

  According to this embodiment as described above, the cathode gas passage 12 is directed from the inlet 12i of the desorption panel 56 to the inlet 15i of the humidifier 15 through the passage 12f and the passage 12s. Specifically, as shown in FIG. 2, the cathode gas passage 12 is divided into an intake port 12 i provided in the desorption panel 56, an air filter portion 66, a passage 12 f to the branch portion 77 k of the duct 77, and a branch. A passage 12s between the portion 77k and the inlet 15i of the humidifier 15;

  Here, according to the present embodiment, as shown in FIG. 2, the first one-side space 50 y and the second one-side space 50 w are arranged through the center line P <b> 1 in the housing chamber 50 x (main housing chamber 51 + compartment 53) of the housing 50. The reformer 2 is disposed in the first one-side space 50y on one side in the housing chamber 50x of the housing 50 together with the pumps 33 and 7. That is, the reformer 2 is disposed on one end side of the stack 3 (center P5 of the stack 3) in the longitudinal direction (arrow L1 direction) of the housing chamber 50x of the housing 50. The pumps 33 and 7 may be disposed in the second one-side space 50w.

  On the other hand, both the intake port 12i of the cathode gas passage 12 and the exhaust port 14p of the cathode off gas passage 14 together with the pump 13, the cathode gas passage 12 and the cathode off gas passage 14 are connected to other chambers 50x in the housing 50x. It is arranged in the second one-side space 50w that is one side, that is, it is arranged on the other end side of the stack 3 (the center P5 in the longitudinal direction of the stack 3) in the longitudinal direction (arrow L1 direction). Here, the exhaust port 14p is a dedicated exhaust port for discharging the cathode off gas after the power generation reaction, and with respect to the exhaust gas outlet 2k for discharging the exhaust gas after combustion of the anode off gas and the combustion exhaust gas of the combustion part 2c, Separated and independent. As a result, the length of the cathode gas passage 12 is suppressed and shortened because it is disposed only in the second one-side space 50w. Therefore, the pressure loss of the cathode gas passage 12 is suppressed while the increase in the diameter of the cathode gas passage 12 is suppressed. Furthermore, the length of the cathode offgas passage 14 is suppressed and shortened because it is disposed only in the second one-side space 50w. As a result, the pressure loss of the cathode offgas passage 14 is suppressed.

  According to the present embodiment, as shown in FIG. 2, the humidifier 15 is backed only by the second one-side space 50 w so that the stack 3 is disposed between the humidifier 15 and the reformer 2. It is further away from the reformer 2 that can be a heat radiation source in the longitudinal direction. Thereby, it is suppressed that the reformer 2 which can be a heat radiation source exerts a thermal influence on the humidifying performance of the humidifier 15. In particular, as shown in FIG. 2, the humidifier 15 is disposed only on the other end side in the storage chamber 50x in the longitudinal direction (arrow L1 direction) while being disposed only in the second one-side space 50w. Therefore, the humidifier 15 faces the compartment 53 (having little or no heat radiation source) in the storage chamber 50x that is easily maintained at a lower temperature than the main storage chamber 51. Therefore, it is suppressed that the humidifier 15 becomes high temperature excessively, and humidification performance is maintained favorable.

  As described above, the reformer 2 is separated from the cathode gas passage 12 and the cathode offgas passage 14. Therefore, it is suppressed that the reformer 2 serving as a heat radiation source exerts a thermal influence on the cathode gas in the cathode gas passage 12 and the cathode off gas in the cathode off gas passage 14. Therefore, the thermal expansion of the volume of the cathode gas in the cathode gas passage 12 and the thermal expansion of the volume of the cathode off gas in the cathode off gas passage 14 are suppressed. Therefore, it is advantageous to reduce power loss of the cathode gas pump 13 (cathode gas transfer source) that transfers the cathode gas to the cathode of the stack 3. In this case, the cathode gas pump 13 can be reduced in size.

  According to the present embodiment, the housing 50 includes the detachable panel 56 (first side surface portion) and the second side surface portion 50m that intersect each other. On the other hand, the inlet 12i of the cathode gas passage 12 is provided in the detachable panel 56 (first side surface portion). On the other hand, the exhaust port 14p of the cathode off-gas passage 14 is provided in the second side surface portion 50m (see FIG. 3) disposed so as to intersect the desorption panel 56. For this reason, the intake port 12i and the exhaust port 14p can be separated from each other while approaching each other. Therefore, it is possible to suppress the intake port 12i from immediately sucking the cathode off gas in which the active material (oxygen) discharged from the exhaust port 14p is reduced. Therefore, the power generation efficiency of the stack 3 is ensured.

  As shown in FIG. 2, the reformer 2 is disposed in the main storage chamber 51 of the housing 50, and in particular, the main storage chamber in the longitudinal direction (the direction of the arrow L <b> 1 shown in FIG. 2) of the housing 50. 51 is disposed at a position away from the compartment 53 (that is, one end side in the arrow L1 direction). The reason for this is to prevent the heat release from the reformer 2 having the combustion section 2 c that is at a high temperature from raising the temperature of the compartment 53. Therefore, the chamber space of the compartment 53 is maintained at a lower temperature than the main storage chamber 51. In addition, although the combustion part 2c is arrange | positioned at the upper part side of the reforming part 2a, it is not restricted to this, You may arrange | position at the lower part side of the reforming part 2a.

(Embodiment 2)
Since the second embodiment basically has the same configuration and the same function and effect as those of the first embodiment, FIGS. 1 and 2 are applied mutatis mutandis. According to the present embodiment, as in the first embodiment, as shown in FIG. 4, the cathode offgas having high humidity after the power generation reaction is discharged from the outlet 15p of the humidifier 15 to the cathode gas passage 14. The cathode offgas passage 14 includes a passage 14f from the outlet 15p of the humidifier 15 toward the inlet 22i of the condenser 22, and a passage 14s from the outlet 22p of the condenser 22 toward the exhaust port 14p. This cathode off gas is cooled by the condenser 22, and moisture contained in the cathode off gas is condensed in the condenser 22 as condensed water. The cathode off gas after the condensed water is generated is discharged to the outside (lateral direction) of the housing 50 from the exhaust port 14p. Here, as shown in FIG. 4, when the vertical line passing through the center in the width direction (arrow L2 direction) of the casing 50 is a center line P2, the condenser 22 is arranged on the side surface portion 50m side from the center line P2. Has been. That is, as shown in FIG. 4, the center P6 of the condenser 22 is disposed on the side surface portion 50m side with respect to the center line P2. Therefore, the length of the passage 14s from the outlet 22p of the condenser 22 to the exhaust port 14p can be further shortened.

(Embodiment 3)
5 to 7 show the third embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. In the following, different parts will be mainly described. According to the present embodiment, as shown in FIG. 5, the partition wall 55 has a notch-shaped opening 75 that allows the main storage chamber 51 and the compartment 53 to communicate with each other. The opening 75 is open to the side, functions as a maintenance opening, and extends along the direction of the vertical line. The opening 75 has a quadrangular shape and allows the main storage chamber 51 and the compartment 53 to communicate with each other. The opening 75 has an opening area that allows the water purifier 28 as a maintenance part to be taken in and out. As shown in FIG. 7, the opening 75 has an upper side 75u, a lower side 75d, and a side side 75s. A seal member 76 (see FIG. 5) is provided on the periphery of the opening 75 in the partition wall 55.

  As can be understood from FIG. 5, a metal attachment / detachment panel 56 is attached to the side of the compartment 53 in the casing 50 by a fixture 56 x such as a bolt. When the fixture 56x is removed, the detachable panel 56 is detached from the housing 50 outward. The detachable panel 56 has air permeability, can be detached from and attached to the housing 50, and closes the compartment 53.

  As shown in FIG. 6, the detachable panel 56 has a U-shape in cross section, and the first wall portion 56f and the second wall portion provided in a direction intersecting the first wall portion 56f. 56 s. If the detachable panel 56 is removed from the casing 50, the compartments 53 of the casing 50 are exposed in a plurality of directions, so that the maintenance workability for the maintenance components in the compartments 53 is improved. When the detachable panel 56 is removed from the housing 50 in the direction of arrow M1 (see FIG. 6), the compartment 53 in which a large number of maintenance parts are accommodated is opened in a plurality of directions. Therefore, the maintenance work of the maintenance parts accommodated in the compartment 53 becomes good.

  An air filter section 66 is provided in the compartment 53 of the housing 50 so as to face the partition wall 55. The air filter portion 66 is fixed to the inner surface 56i of the detachable panel 56 by welding or an unillustrated fixture.

  As can be understood from FIG. 5, the case 66 t functioning as an outer box of the air filter portion 66 during normal operation such as during operation of the fuel cell system, together with the back plate 66 w held on the back surface of the case 66 t, The opening 75 is closed. Therefore, the air filter part 66 can function as an opening / closing member or a lid member that closes the opening 75 in an openable / closable manner. In this case, the back plate 66w of the air filter portion 66 (a part of the air filter portion 66) is sealed by being pressed against the seal member 76 of the partition wall 55. In this state, the inside of the air filter portion 66 communicates with the opening 75 so that the outside air outside the housing 50 can be introduced to the duct 77 side as the cathode gas.

  As shown in FIG. 5, a duct 77 having a hollow cylindrical shape is provided to form an air passage 34 that can supply outside air as cathode gas to the cathode of the stack 3. The duct 77 communicates the back surface 66r side, which is the outlet side of the air filter portion 66, and the part 68p of the electrical equipment box 68 (inverter box). The electric equipment box 68 includes a box chamber 68a that can be a passage through which air can pass, and an electric equipment 68c that can be a heat radiation source disposed in the box chamber 68a. The electric device 68c includes an inverter that converts the power generated by the fuel cell, a power supply board that is electrically connected to a power supply, and other electric components. The air passage 34 connects the outlet 68m of the electric equipment box 68 and the combustion part 2c.

Accordingly, when the air pump 33 (combustion air conveyance source) is driven to rotate, the outside air is supplied to the intake port 12i as the outside air introduction port of the desorption panel 56, the air filter portion 6 6 , the opening 75, the duct 77, and the electric equipment box 68. Is supplied to the combustion section 2c of the reformer 2 through the air passage 34 and used for combustion in the combustion section 2c. In this case, since the electric device 68c that dissipates heat inside the electric device box 68 is cooled by air and overheating of the electric device 68c is suppressed, it is possible to contribute to improving the durability and extending the life of the electric device 68c. Furthermore, since the air supplied to the combustion part 2c of the reformer 2 can be preheated by heat radiation from the electric equipment 68c of the electric equipment box 68, it is advantageous for improving the combustion efficiency in the combustion part 2c.

  The desulfurizer 6 (see FIG. 6) that functions as a maintenance component is provided in the compartment 53 of the casing 50 so as to be separated from the air filter portion 66. The desulfurizer 6 is provided in a compartment 53 that is more easily cooled by outside air than the main storage chamber 51 and is likely to have a low temperature. For this reason, the cooling property and low temperature property of the desulfurizer 6 are ensured, and the desulfurization efficiency in the desulfurizer 6 is maintained.

  Further, according to the present embodiment, the compartment 53 is arranged on the end side in the longitudinal direction of the housing 50, and the compartment 53 is opened when the detachable panel 56 is removed from the housing 50, so the compartment 53 Becomes a maintenance room. For this reason, it is easy to maintain various second maintenance parts such as the desulfurizer 6 disposed in the compartment 53. Furthermore, since the opening 75 is opened, the maintenance person can visually recognize the inside of the main storage chamber 51 from the outside of the compartment 53 or the housing 50 through the opening 75.

  As shown in FIG. 6, an ion exchanger 46 that functions as a maintenance component is provided inside the housing 50. The ion exchanger 46 performs a refining process for reducing the impurities contained in the stack cooling liquid that cools the stack 3 and purifying the purified water to improve the electrical insulation of the stack cooling liquid. When the ion exchange resin as the water purification material accommodated in the ion exchanger 46 is kept in a high temperature environment for a long period of time, there is a risk that thermal degradation will proceed. In this regard, according to the present embodiment, the ion exchanger 46 for purifying the stack coolant is disposed in the compartment 53 serving as a maintenance chamber. As described above, the stack 3, the reformer 2, and the electric equipment box 68 can serve as a heat radiation source. On the other hand, the compartment 53 does not contain the stack 3, the reformer 2, and the electrical equipment box 68 that can be a heat radiation source. Further, the compartment 53 is adjacent to the outside air via a desorption panel 56. Therefore, the compartment 53 is maintained at a lower temperature than the main storage chamber 51. For this reason, the ion exchange resin (stack coolant purification material) accommodated in the ion exchanger 46 is prevented from being thermally deteriorated.

  As shown in FIG. 6, the above-described water purifier 28 is disposed at a position close to the opening 75 of the partition wall 55. Therefore, at the time of maintenance in which the detachable panel 56 is detached from the casing 50, the water purifier 28 disposed in the main storage chamber 51 can be easily taken out from the opening 75 of the partition wall 55 to the compartment 53 side, and further to the outside air side. Has been. For this reason, the maintainability of the water purifier 28 is improved.

  As shown in FIG. 7, a first reservoir tank 81 and a second reservoir tank 82 that function as second maintenance components are arranged in parallel in the compartment 53 of the housing 50. The first reservoir tank 81 stores the stack coolant. Since the stack coolant has antifreeze components (organic antifreeze components such as ethylene glycol, propylene glycol, and glycerin), it has high freezing resistance. For this reason, the first reservoir tank 81 is arranged in the compartment 53 that is easily affected by the temperature of the outside air but has high maintainability. The second reservoir tank 82 contains cooling refrigerant that flows through condensers such as the first condenser 9 and the second condenser 21. This refrigerant has an antifreeze component and has high freezing resistance. For this reason, the second reservoir tank 82 is arranged in the compartment 53 which is easily affected by the temperature of the outside air but has high maintainability.

(Embodiment 4)
FIG. 8 shows a fourth embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. According to the present embodiment, as shown in FIG. 8, the partition wall that partitions the main storage chamber 51 and the compartment 53 is not provided.

(Other embodiments)
The fuel cell system is not limited to the piping shown in FIG. According to the above-described embodiment, the cathode gas passage 12 communicates with the duct 67 connected to the air passage 34 for supplying combustion air, but the cathode gas passage 12 and the air passage 34 are not in communication with each other. Another route may be used. The housing 50 is in the shape of a square box, but may be cylindrical. Although the inlet 12i is formed in the detachable panel 56, the present invention is not limited to this, and the exhaust port 14p is formed in the side 50m of the casing 50, but is formed in the other side of the casing 50. It may be formed on the ceiling wall part 50u or the bottom wall part 50b of the housing 50.

  The pumps 7, 33, 13, and 41 described above may be cathode gas transfer sources such as fans and blowers. According to the above-described embodiment, the first maintenance component is the water purifier 28 for purifying the reformed water, but is not limited to this, the reservoir tanks 81 and 82, the ion exchanger for purifying the stack coolant. 46 may be placed inside the main storage chamber 51 so that it can be taken in and out of the opening 75. Furthermore, a structure in which the ion exchanger 46 for purifying the stack coolant cannot be taken in and out of the opening 75 may be adopted. It is good also as an electric equipment as a maintenance part. The partition wall 55 has a single opening 75 having a notch shape, but is not limited thereto, and may be a type having a plurality of openings 75. It is preferable that each of the plurality of openings 75 be closed by an opening / closing member.

  The seal member 76 is provided on the partition wall 55, but is not limited thereto, and may be provided on the back plate 66w (a part of the air filter unit 66) of the air filter unit 66. If the sealing performance is maintained, the sealing member 76 may be eliminated. The partition wall 55 includes the metal plate 55f and the heat insulating layer 55s. However, the partition wall 55 is not limited thereto, and may be only a metal plate or only a heat insulating plate formed of a heat insulating material.

  According to the above-described embodiment, the air filter unit 66 as the opening / closing member is detached from the partition wall 55 and opens the entire maintenance opening 75, but not limited to this, both the air filter unit 66 and the electric device and the like are opened. Thus, the maintenance opening 75 may be closed and the air filter 66 may be detached from the partition wall 55 so that a part of the maintenance opening 75 is opened. Even in this case, the first maintenance component can be maintained using the maintenance opening 75.

  The duct 77 supplies the combustion air to the combustion unit 2c via the electric equipment box 68. However, the duct 77 supplies the combustion air to the combustion part 2c without using the electric equipment box 68. May be. The compartment 53 is disposed on the end side in the longitudinal direction of the casing 50, but is not limited thereto, and may be on the end side in the width direction of the casing 50.

  According to the above-described embodiment, as shown in FIG. 1, the water generated by the water purifier 28 is supplied to the water tank 25 and then supplied to the reformer 2. The order of the positions of the purifier 28 and the water tank 25 may be changed. In this case, the water stored in the water tank 25 may be purified by the water purifier 28 and then supplied to the reformer 2. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

The following technical idea can also be grasped from the above description.
(Additional Item 1) A housing having a housing chamber, a reformer that is disposed in the housing chamber of the housing and reforms a fuel raw material to generate anode gas, and is disposed in the housing chamber of the housing. A fuel cell stack having an anode to which an anode gas is supplied and a cathode to which a cathode gas is supplied, and a cathode gas passage for supplying the cathode gas to the cathode of the stack having an inlet for sucking the cathode gas And a cathode offgas passage having an exhaust port for flowing the cathode offgas after power generation discharged from the cathode of the stack and discharging the cathode offgas to the outside of the housing. Battery system.

  The present invention can be used for, for example, a fuel cell system for stationary use, vehicle use, electric equipment use, electronic equipment use, portable use, and portable use.

1 is a system diagram schematically showing the concept of a fuel cell system. It is a longitudinal section showing typically the state where the basic composition inside the case was cut perpendicularly along the longitudinal direction. It is a longitudinal section showing typically the state where the basic composition inside the case was cut perpendicularly along the width direction. FIG. 10 is a longitudinal sectional view schematically showing a state where a basic configuration inside a housing is cut along a width direction according to the second embodiment. It is an end view which shows typically the end surface of a housing | casing. FIG. 10 is a longitudinal sectional view schematically showing a state where a basic configuration inside a housing is cut along a longitudinal direction according to the third embodiment. FIG. 10 is a cross-sectional view schematically showing a state where a basic configuration inside a housing is cut along a horizontal direction according to the third embodiment. It is a longitudinal cross-sectional view which shows the state which concerns on Embodiment 3 and made the removal | desorption panel removed from the housing | casing. FIG. 10 is a longitudinal sectional view schematically showing a state in which the basic configuration inside the housing is cut vertically along the longitudinal direction according to the fourth embodiment.

Explanation of symbols

  1 is a supply path, 2 is a reformer, 2a is a reforming section, 2c is a combustion section, 3 is a stack, 4 is a fuel raw material source, 5 is a supply valve, 6 is a desulfurizer (second maintenance part), and 9 is 1st condenser, 10 is an inlet valve, 12 is a cathode gas passage, 12i is an intake port, 13 is a cathode gas pump (cathode gas carrier source), 14 is a cathode offgas passage, 14p is an exhaust port, 15 is a humidifier, 17 is Bypass valve, 19 is anode off-gas passage, 20 is outlet valve, 21 is second condenser, 25 is a water tank, 28 is a water purifier for reforming water, 30 is a stack cooling passage, 31 is an ion exchanger, 40 Is a reforming water passage, 41 is a reforming water pump, 45 is a stack cooling passage, 46 is an ion exchanger for purifying the stack coolant, 50 is a casing, 50x is a storage chamber, a first one-side space 50y, and a second one-side. Spaces 50w and 50m are side faces, 51 is the main A compartment, 53 is a compartment, 55 is a partition, 56 is a detachable panel (side surface part), 58 is a grille, 66 is an air filter part (dust reduction part, opening and closing member), 67 is a duct, 68 is an electrical equipment box, 75 Denotes an opening, 81 and 82 denote reservoir tanks, and P1 denotes a center line.

Claims (8)

A housing with a containment chamber;
A reformer disposed in the housing chamber of the casing to reform the fuel raw material to generate an anode gas;
A fuel cell stack disposed in the housing chamber of the housing and having an anode supplied with the anode gas and a cathode supplied with a cathode gas;
A cathode gas passage for flowing the cathode gas toward the cathode of the stack having an inlet for sucking the cathode gas;
A cathode offgas passage having an exhaust port for flowing the cathode offgas after power generation discharged from the cathode of the stack and discharging the cathode offgas to the outside of the housing;
The direction having the longest length in the direction along the bottom wall portion or the ceiling wall portion of the casing is a longitudinal direction, and the casing is cut along the longitudinal direction so as to visually recognize the inside of the casing. In the cross-sectional view,
When a vertical line passing through the longitudinal center of the casing is a center line, and the housing chamber of the casing is divided into a first one-side space and a second one-side space via the center line,
The reformer is disposed in the first one-side space located on one side of the center line in the longitudinal direction of the housing chamber of the housing; and
The intake port and the exhaust port, the cathode gas passage having the intake port,
A fuel that is disposed in the second one-side space located on one side of the housing in the longitudinal direction of the housing together with the cathode offgas passage having the exhaust port. Battery system. A housing with a containment chamber;
A reformer disposed in the housing chamber of the casing to reform the fuel raw material to generate an anode gas;
A fuel cell stack disposed in the housing chamber of the housing and having an anode supplied with the anode gas and a cathode supplied with a cathode gas;
A cathode gas passage for flowing the cathode gas toward the cathode of the stack having an inlet for sucking the cathode gas;
The direction having the longest length in the direction along the bottom wall portion or the ceiling wall portion of the casing is a longitudinal direction, and the casing is cut along the longitudinal direction so as to visually recognize the inside of the casing. In the cross-sectional view,
When a vertical line passing through the longitudinal center of the casing is a center line, and the housing chamber of the casing is divided into a first one-side space and a second one-side space via the center line,
The reformer is disposed in the first one-side space located on one side of the center line in the longitudinal direction of the housing chamber of the housing; and
The intake port is disposed in the second one-side space located on the other side of the center line in the longitudinal direction of the housing chamber of the housing together with the cathode gas passage having the intake port. A fuel cell system. A housing with a containment chamber;
A reformer disposed in the housing chamber of the casing to reform the fuel raw material to generate an anode gas;
A fuel cell stack disposed in the housing chamber of the housing and having an anode supplied with the anode gas and a cathode supplied with a cathode gas;
A cathode gas passage for flowing the cathode gas toward the cathode of the stack having an inlet for sucking the cathode gas;
The direction having the longest length in the direction along the bottom wall portion or the ceiling wall portion of the casing is a longitudinal direction, and the casing is cut along the longitudinal direction so as to visually recognize the inside of the casing. In the cross-sectional view,
The reformer is disposed in a space on one end side of the stack in the longitudinal direction of the housing chamber of the housing; and
The fuel cell system, wherein the intake port and the cathode gas passage are disposed in a space on the other end side of the stack in the longitudinal direction of the housing chamber of the housing. A cathode offgas passage having an exhaust port for flowing the cathode offgas after power generation discharged from the cathode of the stack and exhausting the cathode offgas to the outside of the housing according to claim 3,
The exhaust port and the cathode off-gas passage are arranged in a space on the other end side of the longitudinal center line of the stack in the longitudinal direction of the housing chamber of the housing. Fuel cell system.   The said housing | casing has the 1st side part and 2nd side part which mutually cross | intersect in one of Claims 1-4, The said inlet port of the said cathode gas channel | path has said 1st side part and The fuel is provided in one of the second side portions, and the exhaust port of the cathode offgas passage is provided in the other of the first side portion and the second side portion. Battery system.   6. The humidifier according to claim 1, wherein the humidifier that humidifies the cathode gas before being supplied to the cathode of the stack is disposed in the housing chamber of the casing. The fuel cell system, wherein the humidifier is spaced apart from the reformer so that the stack is disposed between the humidifier and the reformer in the longitudinal direction of the storage chamber.   7. The cathode gas passage according to claim 6, wherein the cathode gas passage includes an outside air inlet formed in the casing, an air filter portion communicating with the outside air inlet, and the cathode gas that has passed through the air filter portion is supplied to the humidifier. A fuel cell system comprising: a passage to be directed; and a cathode gas transport source configured to transport the cathode gas toward the cathode of the stack through the humidifier.   8. The storage chamber according to claim 1, wherein the storage chamber of the housing includes a main storage chamber that stores the reformer and the stack, and a compartment that is separated from the main storage chamber and stores maintenance components. And a partition that partitions the main storage chamber and the compartment.

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