Search

JP-2026074448-A - fuel cell

JP2026074448AJP 2026074448 AJP2026074448 AJP 2026074448AJP-2026074448-A

Abstract

[Challenge] To suppress the overheating of fuel cells. [Solution] The fuel cell 1 comprises a power generation module 3 made up of a large number of power generation cells 32 stacked together, a housing 2 in which the power generation module 3 is housed, a pressing mechanism 4 housed in the housing 2 that presses the power generation module 3 along the stacking direction of the power generation cells 32, and a partition member 5 arranged inside the housing 2 so as to be in contact with the power generation module 3 and dividing the inside of the housing 2 into a first region A1 in which the power generation module 3 is housed and a second region A2 in which the pressing mechanism 4 is housed. The pressing mechanism 4 is provided with a cooling promotion unit 55 that promotes the cooling of the pressing mechanism 4. [Selection Diagram] Figure 1

Inventors

  • 末廣 眞人
  • 市原 敬士
  • 佐藤 裕一

Assignees

  • 日産自動車株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (14)

  1. A power generation module consisting of multiple cells stacked together, The enclosure in which the above-mentioned power generation module is housed, A pressing mechanism housed in the above-mentioned enclosure presses the above-mentioned power generation module along the stacking direction of the above-mentioned cells, The enclosure has a partition member that is positioned inside the enclosure so as to be in contact with the power generation module, and divides the enclosure into a first region in which the power generation module is housed and a second region in which the pressing mechanism is housed. The fuel cell is characterized in that the pressing mechanism is provided with a cooling promotion unit that promotes the cooling of the pressing mechanism.
  2. The fuel cell according to claim 1, characterized in that the above-mentioned partition member has higher thermal insulation properties than the above-mentioned housing.
  3. The fuel cell according to claim 1, characterized in that the pressing mechanism comprises a main body member having the cooling promotion section, a plurality of pressing members attached to the main body member and capable of pressing the partition member toward the first region, and a plurality of fixing members for fixing the main body member to the housing.
  4. The fuel cell according to claim 3, characterized in that the main body member of the pressing mechanism described above is formed in a grid pattern.
  5. The fuel cell according to claim 4, characterized in that the cooling promotion section is a plurality of metal heat dissipation fins protruding from the main body component.
  6. The above-mentioned cooling promotion section is a metal annular heat dissipation fin protruding from the main body member, and is positioned in the center of the pressing mechanism when viewed in the stacking direction. The fuel cell according to claim 4, characterized in that the pressing member and the fixing member are located outside the cooling promotion section when viewed in the stacking direction.
  7. The fuel cell according to claim 1, characterized in that the housing has a first external cooling promotion section on the outer wall surface of the second region to promote cooling.
  8. The fuel cell according to claim 3, characterized in that the housing has a second external cooling promotion section on the wall surface at a position where at least a portion of the side wall along the stacking direction overlaps with the portion of the main body member to which the fixing member is attached, thereby promoting cooling.
  9. The fuel cell according to claim 4, characterized in that the cooling promotion section is a metal, annular heat dissipation fin protruding from the main body member, positioned in the center of the pressing mechanism in the stacking direction view, and the inner circumferential surface of the heat dissipation fin is formed as a curved surface that is convex inward.
  10. The fuel cell according to claim 3, characterized in that additional heat dissipation fins are formed around the portion to which the above-mentioned fixing member is attached.
  11. The fuel cell according to claim 10, characterized in that a convection-promoting plate for rectifying the convection generated within the second region is attached to the outer periphery of the housing in the stacking direction.
  12. The fuel cell according to any one of claims 1 to 11, characterized in that the housing has a plurality of ventilation holes in the central part and outer edge of the top wall facing the partition member with the pressing mechanism in between, thereby connecting the second region to the outside.
  13. The above housing comprises a cylindrical main body, a first end plate that closes the opening at one end of the main body, and a second end plate that closes the opening at the other end of the main body. The first region described above is formed between the partition member and the second end plate. The fuel cell according to claim 12, characterized in that the power generation module is configured such that the supplied anode gas flows in a sealed state inside the power generation module so as not to flow out into the first region, and the cathode gas supplied to the power generation module flows within the first region.
  14. The fuel cell according to claim 12, characterized in that the partition member is a laminate formed by overlapping a first metal plate member and a second non-metallic plate member, and the first plate member faces the second region and the second plate member faces the first region.

Description

This invention relates to a fuel cell. For example, Patent Document 1 discloses a fuel cell in which a cell stack, consisting of multiple stacked unit cells, is sandwiched between a first and a second current collector in the stacking direction of the unit cells, and an elastic member elastically biases the second current collector toward the first current collector via a fastening member. Japanese Patent Publication No. 2018-85327 A schematic diagram illustrating the general configuration of the fuel cell according to the present invention.A plan view of the first end plate, which is a component of the housing of the fuel cell according to the present invention.A schematic exploded perspective view showing the configuration housed within the casing of the fuel cell according to the present invention.An explanatory diagram showing a plan view of a part of the housing and power generation module of the fuel cell according to the present invention.An exploded perspective view of a power generation unit in a fuel cell according to the present invention.A schematic diagram illustrating the central anode gas flow path.A schematic diagram illustrating the central cathode gas flow path.An explanatory diagram showing the general structure of the main body component of the pressing mechanism.A schematic diagram showing the fuel cell with the first end plate removed.A cross-sectional view of the position along line A-A in Figure 9.Enlarged view of the main part of the pressing mechanism as seen from the partition member side.An explanatory diagram showing a schematic representation of the main body component of the pressing mechanism in the fuel cell of the second embodiment.A schematic diagram illustrating the general configuration of the main components of the fuel cell in the third embodiment.A schematic diagram illustrating the general configuration of the main components of the fuel cell in the fourth embodiment.An explanatory diagram showing the schematic of the fuel cell in the fifth embodiment.An explanatory diagram corresponding to a cross-section along the line B-B in Figure 15.A cross-sectional view showing the main components of the fuel cell in the sixth embodiment.A schematic diagram illustrating the relationship between the convection-promoting plate, the first end plate, and the main body of the housing. Hereinafter, an embodiment of the present invention will be described in detail based on the drawings. Figure 1 is a schematic explanatory diagram showing the general configuration of the fuel cell (solid oxide fuel cell) 1 according to the present invention. Figure 2 is a plan view of the first end plate 12, which is a component of the housing 2 of the fuel cell 1 according to the present invention. Figure 3 is a schematic exploded perspective view showing the configuration housed within the housing 2 of the fuel cell 1 according to the present invention. Figure 4 is an explanatory diagram showing a plan view of a part of the housing 2 and the power generation module 3 of the fuel cell 1 according to the present invention. Fuel cell 1 is, for example, one installed in a vehicle such as an automobile, and generates electricity by supplying anode gas and cathode gas. The anode gas is, for example, hydrogen gas. The cathode gas is, for example, air. As shown in Figure 1, the fuel cell 1 comprises a metal housing 2, a power generation module 3 housed within the housing 2, a pressing mechanism 4 for pressing the power generation module 3, a plate-shaped partition member 5 that divides the inside of the housing 2 into a first region A1 and a second region A2, and insulating members 6 and insulating plates 7 positioned between the housing 2 and the power generation module 3. As shown in Figures 1 to 4, the housing 2 comprises a cylindrical main body 11, a rectangular plate-shaped first end plate 12 that closes the opening at one axial end of the main body 11, and a rectangular plate-shaped second end plate 13 that closes the opening at the other axial end of the main body 11. Here, the axial direction of the main body 11 is the vertical direction in Figure 1. The main body 11 has a rectangular cross-section and a rectangular tube shape, with an internal region (space) that houses the power generation module 3, pressing mechanism 4, partition member 5, insulating member 6, and insulating plate 7. The first end plate 12, as shown in Figure 2, has a rectangular plate shape. The first end plate 12 is detachably attached to the main body 11 via a sealing member (not shown). The first end plate 12 corresponds to the top wall of the housing 2, facing the partition member 5 across the pressing mechanism 4. The first end plate 12 has multiple ventilation holes 14 formed through its central portion and outer edge in a plan view. The multiple first ventilation holes 14a formed in the central portion of the first end plate 12 discharge, for example, a portion of the upward flow of air convection within the second regio