公开(公告)号：US11508976B2

公开(公告)日：2022-11-22

申请号：US16516617

申请日：2019-07-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomio Yamanaka ,  Tomotaka Ishikawa ,  Tomohiro Ogawa ,  Ryosuke Oya ,  Junichi Matsuo

IPC: H01M8/04 ,  H01M8/04223 ,  H01M8/04082 ,  H01M8/0438 ,  H01M8/04089 ,  H01M8/04664 ,  H01M8/0432 ,  H01M8/04858 ,  H01M8/04225 ,  H01M8/04746 ,  H01M8/04111 ,  H01M8/04492 ,  H01M8/04302

Abstract: A fuel cell system includes a fuel cell, an anode gas supply system, an anode gas circulatory system, a cathode gas supply-discharge system, a gas-liquid discharge passage, a gas-liquid discharge valve configured to open and close the gas-liquid discharge passage, a flow-rate acquisition portion, and a controlling portion. After the controlling portion instructs the gas-liquid discharge valve to be opened, the controlling portion executes a normal-abnormality determination such that, when a discharge-gas flow rate of anode gas is a predetermined normal reference value or more, the controlling portion determines that the gas-liquid discharge valve is opened normally, and when the discharge-gas flow rate is lower than the normal reference value, the controlling portion determines that the gas-liquid discharge valve is not opened normally.

公开(公告)号：US10483572B2

公开(公告)日：2019-11-19

申请号：US14922421

申请日：2015-10-26

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshiaki Naganuma ,  Masashi Toida ,  Tomohiro Ogawa ,  Tsuyoshi Maruo

IPC: H01M8/04 ,  H01M8/04746 ,  H01M8/0432 ,  H01M8/04029 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/1018

Abstract: The method comprises: determining whether or not an inlet temperature is equal to or above a lower-limit temperature of a temperature range in which generated water does not freeze within the fuel cell; and adjusting the flow rate of the cooling medium in the circulation flow path to become more than the normal flow rate when it is determined that the inlet temperature is equal to or above the lower-limit temperature, and adjusting the flow rate of the cooling medium in the circulation flow path to be equal to or below the normal flow rate when it is determined that the inlet temperature is not equal to or above the lower-limit temperature.

公开(公告)号：US10381668B2

公开(公告)日：2019-08-13

申请号：US14919993

申请日：2015-10-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshiaki Naganuma ,  Masashi Toida ,  Tomohiro Ogawa ,  Tsuyoshi Maruo

IPC: H01M8/04 ,  H01M8/04746 ,  H01M8/04858 ,  H01M8/0432

Abstract: The operation control method of a fuel cell includes acquiring a startup temperature of the fuel cell; acquiring a present temperature of the fuel cell; setting a present target operation point of the fuel cell that is identified by an output voltage value and an output current value based on the startup temperature, or based on the startup temperature and the present temperature; controlling at least one of the flow of the reaction gas supplied to the fuel cell, and an output voltage of the fuel cell so that the operation point of the fuel cell becomes the target operation point, and setting the target operation point includes a process of setting an operation point having a low output voltage value as the target operation point when the startup temperature is low as compared to the case when the startup temperature is high, if the present temperature is the same.

公开(公告)号：US10312532B2

公开(公告)日：2019-06-04

申请号：US14918927

申请日：2015-10-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshiaki Naganuma ,  Masashi Toida ,  Tomohiro Ogawa ,  Tsuyoshi Maruo

IPC: H01M8/04119 ,  H01M8/04992 ,  H01M8/04223 ,  H01M8/04228 ,  H01M8/1018

Abstract: A method includes predicting, while fuel cell system is operated, whether or not the outside temperature becomes equal to or less than a first predetermined temperature; performing, when it is predicted that the outside temperature becomes equal to or less than the first predetermined temperature, residual water scavenging processing on only an oxidizer gas supply/discharge mechanism and thereafter stopping the operation of the fuel cell system; predicting, after the stop of the operation of the fuel cell system, whether or not the temperature of a predetermined component included in the fuel cell system becomes equal to or less than a second predetermined temperature; and performing the residual water scavenging processing on the fuel gas supply/discharge mechanism when it is predicted that the temperature of the predetermined component becomes equal to or less than the second predetermined temperature.

公开(公告)号：US20180294493A1

公开(公告)日：2018-10-11

申请号：US15944038

申请日：2018-04-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohiro Ogawa ,  Tsuyoshi Maruo ,  Shun Matsumoto ,  Hiroyuki Tsunekawa

IPC: H01M8/0438 ,  H01M8/04089 ,  H01M8/2475 ,  H01M8/04119 ,  H02M3/155 ,  H01M8/04223 ,  H01M8/04746 ,  H01M8/0432

Abstract: A fuel cell system includes a fuel cell stack having a plurality of cells each having hydrogen channels, a hydrogen channel inlet, and a hydrogen channel outlet, a load supplied with power from the fuel cell stack, a circulation passage connecting the channel inlet with the channel outlet, a hydrogen pump provided in the circulation passage, and a controller. The controller rotates the hydrogen pump in a positive direction so as to feed the hydrogen gas in a first amount into each cell through the channel inlet, at a flow rate larger than a minimum flow rate required for power generation, and then rotate the hydrogen pump in a negative direction so as to feed the hydrogen gas into each cell through the channel outlet, during a period from stop of power supply to the load, to the next start of power supply.

公开(公告)号：US10074865B2

公开(公告)日：2018-09-11

申请号：US14939537

申请日：2015-11-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi Toida ,  Yoshiaki Naganuma ,  Tomohiro Ogawa ,  Tsuyoshi Maruo

IPC: H01M8/04 ,  H01M8/04223 ,  H01M8/04089 ,  H01M8/0432 ,  H01M8/04746 ,  H01M8/04303 ,  H01M8/04082 ,  H01M8/10 ,  H01M8/1018

CPC classification number: H01M8/04253 ,  H01M8/04097 ,  H01M8/04201 ,  H01M8/04303 ,  H01M8/0432 ,  H01M8/04373 ,  H01M8/04753 ,  H01M2008/1095

Abstract: To provide technology that is capable of inhibiting a decrease in starting properties of a pump in a low-temperature environment. A fuel cell system is equipped with a control unit, a fuel cell, and a pump. The control unit acquires the temperature of the fuel cell as a parameter expressing the temperature of the pump while operation of the fuel cell is stopped. The control unit rotates rotation body of the pump when it is detected that the temperature of the pump is a threshold value or less set within a predetermined range lower than the freezing point based on the detected temperature of the fuel cell.

公开(公告)号：US10014535B2

公开(公告)日：2018-07-03

申请号：US15184495

申请日：2016-06-16

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohiko Kaneko ,  Yohei Okamoto ,  Kazuo Yamamoto ,  Tomohiro Ogawa ,  Masashi Toida ,  Mitsuhiro Nada ,  Tomio Yamanaka

IPC: H01M8/04 ,  H01M8/04223 ,  H01M16/00 ,  H01M8/04302 ,  H01M8/0432 ,  H01M8/04007 ,  H01M8/04858 ,  B60L11/18 ,  H01M8/04828 ,  H01M8/1018

CPC classification number: H01M8/04253 ,  B60L58/31 ,  B60L58/34 ,  H01M8/04067 ,  H01M8/04223 ,  H01M8/04302 ,  H01M8/0432 ,  H01M8/04932 ,  H01M8/0494 ,  H01M16/006 ,  H01M2008/1095 ,  H01M2220/20 ,  H01M2250/20 ,  H01M2250/402 ,  Y02B90/12 ,  Y02T90/32 ,  Y02T90/34

Abstract: An object is to provide a technique of reducing a potential failure to start a fuel cell system due to a temperature decrease in a vehicle with the fuel cell system mounted thereon. There is provided a vehicle that comprises a fuel cell system, a battery, a motor, and a determiner configured to determine that the fuel cell system has a frozen part when temperature measured by a temperature measurement unit is equal to or lower than a predetermined first temperature and at least one of conditions (1) to (3) is satisfied: (1) no purging process is performed after a change from an on state of the vehicle to an off state of the vehicle; (2) ambient temperature decreases to or below a predetermined second temperature in the off state of the vehicle and no purging process is performed; and (3) an inclination of the vehicle is equal to or greater than a predetermined inclination at a time of change from the off state of the vehicle to the on state of the vehicle.

公开(公告)号：US09991528B2

公开(公告)日：2018-06-05

申请号：US14938047

申请日：2015-11-11

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tsuyoshi Maruo ,  Yoshiaki Naganuma ,  Tomohiro Ogawa ,  Masashi Toida

IPC: H01M8/04 ,  H01M8/04089 ,  H01M8/04664 ,  H01M8/04746 ,  H01M8/0432 ,  H01M8/0438 ,  H01M8/04492

CPC classification number: H01M8/04097 ,  H01M8/04358 ,  H01M8/04388 ,  H01M8/04514 ,  H01M8/04664 ,  H01M8/04761

Abstract: A fuel cell system includes: a fuel cell; a fuel gas path supplied with fuel and allowing a part of fuel gas discharged from the fuel cell to circulate; an exhaust mechanism discharging the reacted fuel gas to an outside; a circulation mechanism circulating the fuel gas; and a control unit configured to temporarily stop circulation of the fuel gas by the circulation mechanism when determining that discharge from the exhaust mechanism is not normal, drive the circulation mechanism so that the fuel gas circulates at a first circulation speed when determining that the discharge is not normal and a parameter relating to water vapor in the fuel gas path is equal to a predetermined value or greater, and drive the circulation mechanism so that the fuel gas circulates at a second circulation speed greater than the first circulation speed when determining that the discharge is normal.

公开(公告)号：US11133515B2

公开(公告)日：2021-09-28

申请号：US15429463

申请日：2017-02-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohiro Ogawa ,  Hiroyuki Imanishi ,  Yohei Okamoto

IPC: H01M8/04 ,  H01M8/04303 ,  H01M10/48 ,  H01M8/04746 ,  H01M8/04223 ,  H01M8/04082 ,  H01M8/0432

Abstract: A fuel cell system has a battery, a gas supply portion, a temperature acquisition portion configured to acquire a presumed temperature that is presumed to reach during the operation stop of the fuel cell; and a scavenging controlling portion. When it is determined that the presumed temperature is a predetermined temperature or more at the time of the operation stop of the fuel cell, the scavenging controlling portion performs the stop-time scavenging operation with a first scavenging ability; and when it is determined that the presumed temperature is less than the predetermined temperature, the scavenging controlling portion performs the stop-time scavenging operation with a second scavenging ability higher than the first scavenging ability.

公开(公告)号：US10777827B2

公开(公告)日：2020-09-15

申请号：US14937321

申请日：2015-11-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohiro Ogawa ,  Ryosuke Oya ,  Tomohiko Kaneko ,  Mitsuhiro Nada ,  Yoshiaki Naganuma

IPC: H01M8/00 ,  H01M8/04119

Abstract: A technique that suppresses excessive water drainage from a fuel cell is provided. A water drainage device that drains water from inside of a fuel cell includes: a purge gas supply system; an operation unit; a water drainage controller; and a water content acquirer. The operation unit receives a water drainage command from a water drainage switch configured to control execution of a purge process by the purge gas supply system. When the water content obtained by the water content acquirer is equal to or lower than a predetermined value, the water drainage controller performs either one of: (i) invalidating the received water drainage command; and (ii) changing a processing condition of the purge process to decrease an amount of water drained by the purge process, compared with an amount of water drainage when the obtained water content is higher than the predetermined value.