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Fuel cell system and method for controlling fuel cell system

A fuel cell system, fuel cell technology, applied in the direction of fuel cells, power system fuel cells, circuits, etc.

Pending Publication Date: 2021-07-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is still room for improvement in the estimation accuracy for the estimation of the emitted hydrogen concentration

Method used

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  • Fuel cell system and method for controlling fuel cell system
  • Fuel cell system and method for controlling fuel cell system
  • Fuel cell system and method for controlling fuel cell system

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0030] figure 1It is a schematic view showing a brief configuration of a fuel cell system 100 mounted on a vehicle. The fuel cell system 100 includes a fuel cell 10, an oxidizing gas system circuit 20, a fuel gas system loop 40, a cooling system circuit 60, a load 71, a control unit 80, a current sensor 11, a voltage sensor 12, a temperature sensor 14, and a muffler 52. The fuel cell 10 uses a fuel gas and an oxidizing gas to generate electricity by an electrochemical reaction. The fuel cell 10 has a stacked structure that is laminated by a plurality of unit cells 90. The single battery 90 has a configuration constructed by a spacer (not shown) holding MEGA (MEMBRANE ELECTRODE AND GASDIFFusion Layer assembly ") (not shown). MEGA has a gas diffusion layer (not shown) in both sides of the MEA (MEMBRANE ELECTRODE ASSEMBLY-membrane electrode assembly) (not shown), and the MEA includes an electrode catalyst having a surface function function in an electrolyte membrane (not shown) as a...

no. 3 Embodiment approach

[0088] In the third embodiment, the fuel cell 10 is controlled by the discharge of the hydrogen concentration CH as the reference concentration of the hydrogen concentration CH as the reference mapping of the reference mapping map by the discharge hydrogen concentration CH. Thereby, the discharge hydrogen concentration CH of the fuel cell 10 can be maintained below the reference concentration.

[0089] Figure 9 It is a diagram for explaining an operation point mapping map for determining the target operating point in the preheating operation of the fuel cell 10. In addition, use Figure 9 The action point determined is the action point in the preheating operation. As described above, it is a low efficiency action point with low efficiency than the reference action point. Figure 9 The horizontal axis is the current of the fuel cell 10, and the vertical axis is the voltage of the fuel cell 10. in Figure 9 In the middle, the power lines PL indicating a working point of the same power...

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PUM

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Abstract

The present invention relates to a fuel cell system and a method for controlling the fuel cell system. The fuel cell system comprises: a fuel cell in which unit cells are stacked; a voltage sensor that detects a voltage per unit of one or a plurality of unit cells; and a control unit that determines an operation point of the fuel cell, operates the fuel cell, and operates the fuel cell at a low-efficiency operation point that is lower in efficiency than the reference operation point during warm-up operation of the fuel cell. During warm-up operation, the control unit calculates the total number of unit cells in which the detection voltage of the voltage sensor is equal to or less than a predetermined first reference voltage, and calculates the discharged hydrogen concentration using the total number of unit cells.

Description

Technical field [0001] The present disclosure relates to a method of controlling a fuel cell system and a fuel cell system. Background technique [0002] It is known that in the preheating operation based on low efficiency, hydrogen ions produced and moved to the cathode are received in the anode to produce pump hydrogen. If the amount of pump hydrogen is increased, the hydrogen concentration in the cathode exhaust gas (hereinafter, referred to as discharge hydrogen concentration.) May rise. The amount of the pump hydrogen production amount is inferred in the formation of pump hydrogen production by the fuel cell, the correction coefficient of the fuel cell, and the number of pump hydrogen generated according to the operation of the fuel cell, and the number of pump hydrogen generated according to the fuel cell. Methods. [0003] However, there is room for improving the inferior accuracy for the inference of the discharge hydrogen concentration. Inventive content [0004] The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0444H01M8/04225H01M8/04302H01M8/04791H01M8/04992
CPCH01M8/04225H01M8/04992H01M8/0447H01M8/04302H01M8/04805H01M8/04253H01M8/0432H01M8/04462H01M8/04552H01M8/04559H01M2250/20Y02T90/40Y02E60/50
Inventor 难波良一真田季幸常川洋之井漕好博伊藤真洋
Owner TOYOTA JIDOSHA KK