公开(公告)号：US20210376354A1

公开(公告)日：2021-12-02

申请号：US17221019

申请日：2021-04-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuhei NAKAMURA ,  Tsuyoshi MARUO ,  Osamu HAMANOI ,  Hiroyuki TSUNEKAWA

IPC: H01M8/04746 ,  H01M8/04029 ,  H01M8/04537

Abstract: A fuel cell system includes a fuel cell a current sensor that detects a current of the fuel cell, a plurality of cell voltage sensors that detects a voltage in a unit of one or two or more cells of the fuel cell among the cells, a pump that adjusts a flow rate of the cooling medium, and a controller. The controller estimates, in a first case, a calorific value of the fuel cell using each detected cell voltage value and the detected current value, decides the flow rate of the cooling medium based on the estimated calorific value, and controls the operation of the pump such that the flow rate of the cooling medium is lower than that of a case where the estimated calorific value is the same in a normal operation of the fuel cell.

公开(公告)号：US20190273273A1

公开(公告)日：2019-09-05

申请号：US16286915

申请日：2019-02-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Satoshi WATANABE ,  Satoshi SHIOKAWA ,  Shuhei NAKAMURA ,  Norihiro FUKAYA

IPC: H01M8/0438 ,  H01M8/04111 ,  H01M8/04082 ,  H01M8/0432 ,  H01M8/04119 ,  H01M8/04858 ,  B60L50/72 ,  B60L50/71

Abstract: A fuel cell system includes: a flow sensor configured to measure an actual flow rate of air which is introduced into an oxidizing gas supply passage via a compressor when a fuel cell generates electric power; and a wind speed deriving unit configured to acquire a flow rate of air measured by the flow sensor in a state in which air flows from the oxidizing gas supply passage to an oxidizing gas discharge passage via the compressor and a bypass flow passage and to derive an actual wind speed of wind which is received by the fuel cell system, when the compressor stops.

公开(公告)号：US20190280317A1

公开(公告)日：2019-09-12

申请号：US16288412

申请日：2019-02-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Satoshi SHIOKAWA ,  Takahiko HASEGAWA ,  Kohei ODA ,  Satoshi WATANABE ,  Shuhei NAKAMURA ,  Norihiro FUKAYA

IPC: H01M8/04223 ,  H01M8/2404 ,  H01M8/242 ,  H01M8/04858 ,  H01M4/90

Abstract: A fuel cell system includes a removal treatment execution unit configured to execute an oxide layer removal treatment that removes an oxide layer generated on a catalyst of a fuel cell. The removal treatment execution unit is configured to execute the oxide layer removal treatment by adjusting a voltage of the fuel cell to be within a predetermined second voltage range lower than a predetermined first voltage range that is lower than an open-circuit voltage, when an operation of the fuel cell system shifts from a first operation, where a current value of the fuel cell is zero and the flow rate is controlled to maintain the voltage of the fuel cell within the first voltage range, to a second operation, where the current value is larger than zero and the flow rate is controlled in response to an output request to the fuel cell.