Fuel cell system

Patent metadata

Field	Value
Publication number	US-2022320552-A1
Application number	US-202217680229-A
Country	US
Kind code	A1
Filing date	Feb 24, 2022
Priority date	Mar 31, 2021
Publication date	Oct 6, 2022
Grant date	—

Abstract

When controlling the power generation state of a fuel cell stack based on a generated current command value, a control device sets the generated current command value based on a generated power command value and a generated voltage acquired by a voltage sensor such that the following expression is satisfied, regardless of whether a bleed valve is opened or closed: generated current command value=generated power command value/generated voltage.

First claim

What is claimed is:

1 . A fuel cell system comprising:
a fuel cell configured to generate power using a fuel gas supplied to an anode through a fuel gas supply flow path and an oxygen-containing gas supplied to a cathode through an oxygen-containing gas supply flow path, the fuel cell system further comprising: a fuel exhaust gas flow path through which a fuel exhaust gas discharged from the anode flows; a connection flow path configured to allow the fuel exhaust gas flow path and the oxygen-containing gas supply flow path to communicate with each other; an on-off valve configured to open or close the connection flow path; a control device configured to control a state of supply of the fuel gas to the fuel cell and a state of supply of the oxygen-containing gas to the fuel cell, the control device comprising one or more processors that execute computer-executable instructions stored in a memory; and a voltage acquirer configured to acquire a generated voltage of the fuel cell, wherein when controlling a power generation state of the fuel cell based on a generated current command value, the one or more processors execute the computer-executable instructions to cause the control device to: perform first power generation control in which the generated current command value is set based on a generated power command value during closing of the on-off valve; and perform second power generation control in which the generated current command value is set based on the generated power command value and the generated voltage during opening of the on-off valve.

2 . The fuel cell system according to claim 1 , further comprising a fuel gas concentration acquiring unit configured to acquire a concentration of the fuel gas flowing through the anode, wherein
the one or more processors cause the control device to open the on-off valve when the concentration of the fuel gas acquired by the fuel gas concentration acquiring unit becomes equal to or less than a predetermined value.

3 . The fuel cell system according to claim 1 , further comprising a fuel gas concentration acquiring unit configured to acquire a concentration of the fuel gas flowing through the anode, wherein
the one or more processors cause the control device to switch from the first power generation control to the second power generation control before opening the on-off valve when the concentration of the fuel gas acquired by the fuel gas concentration acquiring unit becomes equal to or less than a predetermined value.

Assignees

• Honda Motor Co Ltd

Inventors

• Sakai Ryoji
• Inoue Kazuhide
• NAKAGAWA Takuto

Classifications

• H01M8/04089 Primary

  of gaseous reactants · CPC title

• H01M8/04992

  characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence · CPC title

• B60L1/02

  to electric heating circuits · CPC title

• B60L3/0053

  relating to fuel cells · CPC title

• B60L58/33 Primary

  by cooling · CPC title