Fuel cell system
A fuel cell system, fuel cell technology, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems of exhaust gas inflow and insufficient research.
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no. 1 Embodiment approach
[0019] figure 1 It is an explanatory diagram showing a schematic configuration of the fuel cell system 10 . The fuel cell system 10 includes a plurality of fuel cell units 20, 21, an exhaust pipe 50, and a host control unit 70 (in figure 1 In , it is described as "upper ECU70". ), housing 80 and ventilation device 90. The plurality of fuel cell units 20 and 21 are housed in a casing 80 . Here, the case 80 refers to an engine compartment for housing the fuel cell units 20 and 21 when a plurality of fuel cell units 20 and 21 are mounted on a mobile body, and an FC box as a container for housing the fuel cell units 20 and 21 . In the case where the plurality of fuel cell units 20 and 21 are installed, they may also include a room in a hut or a building. The exhaust pipe 50 is a pipe that communicates with the outside of the casing 80 and discharges fuel off-gas and gas off-gas from the fuel cell units 20 and 21 to the outside of the casing 80 . The ventilator 90 is a device ...
no. 2 Embodiment approach
[0042] Figure 4 It is a control flowchart of the control unit 700 of the fuel cell unit 20 not performing the power generation operation in the second embodiment. In the second embodiment, the driving timing of the gas compressor 320 in the fuel cell unit 20 that is not performing power generation operation is delayed compared to the first embodiment. ie, with image 3 Compared to the control flow diagram shown, Figure 4 The shown control flowchart is different in that steps S205 and S225 are included.
[0043] In step S200, when the control unit 700 receives from the host control unit 70 that the control unit 701 of the connected other power generation unit 21 issues a power generation operation command, it proceeds to step S205, and after a certain period of time, the process proceeds to step S210. . The predetermined period of time during which the control unit 700 waits in step S205 is the period of time until the exhaust gas of the fuel cell unit 21 performing the p...
no. 3 Embodiment approach
[0049] Figure 5 It is a control flowchart of the control unit 700 of the fuel cell unit 20 not performing power generation operation in the third embodiment. While the backflow of exhaust gas is suppressed in the first and second embodiments, in the third embodiment, when the backflow of exhaust gas occurs for some reason, the exhaust gas in the casing 80 is discharged. Figure 5 The control flowchart in the third embodiment shown differs from the control flowchart in the first embodiment in that steps S215 and S240 are included. Hereinafter, different points will be described.
[0050] In step S215, the control unit 700 of the fuel cell unit 20 not performing power generation operation judges whether or not the gas supply by the gas compressor 320 cannot be performed, and if not, proceeds to step S240, and if not, The process moves to step S220. When the drive motor of the gas compressor 320 is provided with a rotational speed sensor such as a resolver of the gas compress...
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