Fuel cell power generation system

Abstract

There is provided a fuel cell power generation system in which power loss in a power line electrically connecting a stack and a power conversion circuit, thereby attaining high power generation efficiency. A reformer 6 and the stack 7 are disposed in a main body package 2 . Stack output terminals 31 are provided in both ends in a stacking direction of the stack 7 . A power conversion circuit 24 is disposed in the main body package 2 and arranged in the proximity to the stack 2 . Power conversion circuit input terminals 32 are provided on the power conversion circuit 24 and arrayed in a direction parallel to the stacking direction of the stack. Stack output lines 27 electrically connect the stack output terminals 31 and the power conversion circuit input terminals 32.

1 . A fuel cell power generation system, comprising:
 a main body package;   a reformer disposed in the main body package;   a stack disposed in the main body package;   stack output terminals provided in both ends in a stacking direction of the stack;   a power conversion circuit disposed in the main body package and arranged in the proximity to the stack;   power conversion circuit input terminals provided on the power conversion circuit and arrayed in a direction parallel to the stacking direction of the stack; and   stack output lines electrically connecting the stack output terminals and the power conversion circuit input terminals.   
     
     
         2 . The fuel cell power generation system as set forth in  claim 1 , further comprising:
 a partition wall partitioning an interior of the main body package into a first chamber and a second chamber, the partition wall defining a gap in an upper part thereof, wherein:   the reformer and the stack are disposed in the first chamber;   the power conversion circuit and a control circuit are disposed in the second chamber; and   the stack output lines electrically connecting the stack and the power conversion circuit extend through the gap.   
     
     
         3 . The fuel cell power generation system as set forth in  claim 2 , wherein the stacking direction of the stack is parallel to the partition wall. 
     
     
         4 . The fuel cell power generation system as set forth in  claim 2 , wherein:
 the stack is disposed in the proximity to the partition wall and a top face of the main body package; and   the power conversion circuit is disposed in the proximity to the partition wall and the top face of the main body package.   
     
     
         5 . The fuel cell power generation system as set forth in  claim 2 , wherein the stack and the power conversion circuit oppose each other across the partition wall. 
     
     
         6 . The fuel cell power generation system as set forth in  claim 2 , wherein a top face of the stack and an upper face of the power conversion circuit are made to be substantially the same height. 
     
     
         7 . The fuel cell power generation system as set forth in  claim 2 , wherein the stack output lines electrically connect the stack terminals provided on a top face of the stack and the power conversion circuit input terminals provided on an upper face of the power conversion circuit. 
     
     
         8 . A fuel cell power generation system, comprising:
 a main body package;   a hot water storage tank disposed in the main body package;   a stack disposed in the main body package;   a reformer disposed in the main body package;   an electric circuit disposed in the main body package and comprising:   a high-voltage circuit including a power conversion circuit; and   a low-voltage circuit;   a ventilation fan disposed in the main body package and configured to discharge air in the main body package to an exterior of the main body package;   an air intake port provided in a lower part of the main body package which is below the stack and the reformer; and   a partition wall partitioning an interior of the main body package into a space in which the stack and the reformer are disposed and a space in which the high-voltage circuit is disposed, wherein:   the ventilation fan is disposed in an upper part of the space in which the stack and the reformer are disposed;   the stack, the reformer and the electric circuit are vertically arranged in a lateral side of the hot water storage tank so as to be substantially the same height with the hot water storage tank; and   the high-voltage circuit is arranged above the stack and the reformer.   
     
     
         9 . A fuel cell power generation system, comprising:
 a main body package having a first chamber and a second chamber;   a hot water storage tank disposed in the first chamber;   a stack disposed in the second chamber;   a reformer disposed in the second chamber;   an electric circuit disposed in the second chamber and comprising:   a high-voltage circuit including a power conversion circuit; and   a low-voltage circuit;   a ventilation fan disposed in the second chamber and configured to discharge air in the second chamber to an exterior of the main body package;   an air intake port provided in a lower part of the second chamber which is below the stack and the reformer; and   a partition wall partitioning the second chamber into a space in which the stack and the reformer are disposed and a space in which the high-voltage circuit is disposed, wherein:   the ventilation fan is disposed in an upper part of the space in which the stack and the reformer are disposed;   the stack, the reformer and the electric circuit are vertically arranged in a lateral side of the hot water storage tank so as to be substantially the same height with the hot water storage tank; and   the high-voltage circuit is arranged above the stack and the reformer.   
     
     
         10 . The fuel cell power generation system as set forth in  claim 8 , wherein the stack and the power conversion circuit oppose each other across the partition wall. 
     
     
         11 . The fuel cell power generation system as set forth in  claim 10 , wherein a stacking direction of the stack is substantially parallel to a board face of the power conversion circuit. 
     
     
         12 . The fuel cell power generation system as set forth in  claim 11 , wherein:
 the stack comprises:   a stack positive terminal provided in an upper portion of one end of the stacking direction; and   a stack negative terminal provided in an upper portion of the other end of the stacking direction;   a power conversion circuit positive terminal and a power conversion circuit negative terminal are provided in a lower part of the power conversion circuit;   the stack positive terminal and the power conversion positive terminal substantially oppose each other across the partition wall; and   the stack negative terminal and the power conversion negative terminal substantially oppose each other across the partition wall.   
     
     
         13 . The fuel cell power generation system as set forth in  claim 12 , wherein:
 the partition wall is formed with a pair of through holes;   the stack positive terminal and the power conversion circuit positive terminal are electrically connected by a positive output line extending through one of the through holes; and   the stack negative terminal and the power conversion circuit negative terminal are electrically connected by a negative output line extending through the other one of the through holes.   
     
     
         14 . The fuel cell power generation system as set forth in  claim 9 , wherein the stack and the power conversion circuit oppose each other across the partition wall.