公开(公告)号：US20180145356A1

公开(公告)日：2018-05-24

申请号：US15806575

申请日：2017-11-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshiaki TSURUTA ,  Satoshi WATANABE ,  Hideyuki KUMEI ,  Shuya KAWAHARA ,  Kohei ODA

IPC: H01M8/04858 ,  H01M8/04537 ,  H01M16/00

Abstract: A fuel cell system according to one embodiment performs refresh control of an electrode catalyst of a fuel cell, by reducing a stack voltage as a voltage of the fuel cell to a refresh voltage at which the electrode catalyst is activated. The system includes the fuel cell that generates electric power by an electrochemical reaction using fuel gas and oxidation gas, a stack voltage sensor that sensors the stack voltage, and a controller that controls power of the fuel cell. When a high load demand that makes the stack voltage lower than a given voltage is made on the fuel cell, the controller causes the fuel cell to deliver power commensurate with the high load demand, and performs refresh control when the stack voltage becomes lower than the given voltage through the above control.

公开(公告)号：US20160315342A1

公开(公告)日：2016-10-27

申请号：US15107656

申请日：2014-11-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuya KAWAHARA ,  Shigeki HASEGAWA ,  Keita YAMAUE

IPC: H01M8/04746 ,  H01M8/04537 ,  H01M8/04828

CPC classification number: H01M8/04753 ,  H01M8/04544 ,  H01M8/04559 ,  H01M8/04634 ,  H01M8/04895 ,  H01M2008/1095

Abstract: In order to make a power generation quantity of a cell for fuel cell increase in a short time when a drop in moistness of the cell causes the power generation quantity of the cell to decrease, a cathode of the cell includes a conductive material, catalyst, and ionomer which covers the conductive material and catalyst. If an output voltage value of the cell is lower than a predetermined threshold voltage value and an electrical resistance value of the cell is higher than a predetermined threshold resistance value, control for increasing an oxidizing gas amount which increases an amount of oxidizing gas sent to the cell is performed.

Abstract translation: 为了在电池的湿度下降导致电池的发电量降低的情况下，在短时间内使燃料电池用电池的发电量增加，电池的阴极包括导电材料，催化剂， 和离子聚合物，其覆盖导电材料和催化剂。 如果电池的输出电压值低于预定的阈值电压值，并且电池的电阻值高于预定的阈值电阻值，则增加氧化气体量的控制增加发送到 执行单元格。

公开(公告)号：US20190273272A1

公开(公告)日：2019-09-05

申请号：US16276770

申请日：2019-02-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryouichi NAMBA ,  Shuya KAWAHARA ,  Norihiro FUKAYA

IPC: H01M8/0438 ,  H01M8/04858 ,  H01M8/04746 ,  H01M16/00 ,  F04D27/02

Abstract: A fuel cell system includes a control unit that is configured to perform highland control for increasing an amount of electric power generated per unit time by a fuel cell and increasing a rotational speed of a compressor such that an operating point of the compressor falls outside a surging region, in comparison with a case where a highland condition that an outside air pressure determined from an outside air pressure-associated information is lower than an outside air pressure threshold determined in advance is not fulfilled, when the highland condition is fulfilled in starting electric power generation by the fuel cell.

公开(公告)号：US20160079621A1

公开(公告)日：2016-03-17

申请号：US14890444

申请日：2014-04-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuya KAWAHARA ,  Keigo SUEMATSU ,  Masashi TOIDA ,  Ryota AKABOSHI

IPC: H01M8/04

CPC classification number: H01M8/04768 ,  H01M8/04074 ,  H01M8/04253 ,  H01M8/04268 ,  H01M8/04358 ,  Y02E60/50

Abstract: A fuel cell system comprises a fuel cell stack, a circulation flow path of a cooling medium, a pump provided in the circulation flow path, a supply-side temperature sensor provided to detect a supplied cooling medium temperature, a discharge-side temperature sensor provided to detect a discharged cooling medium temperature, and a cold-start controller configured to control a circulation volume of the cooling medium by the pump at a cold start of the fuel cell stack. The cold-start controller estimates a fuel cell internal temperature and selectively sets the circulation volume of the cooling medium between a reduced volume and a normal volume, based on a magnitude relationship between the internal temperature and the discharged cooling medium temperature. When the supplied cooling medium temperature becomes equal to the discharge cooling medium temperature after setting the circulation volume, the cold-start controller sets the circulation volume of the cooling medium to an increased volume (maximum circulation volume).

Abstract translation: 一种燃料电池系统，包括燃料电池堆，冷却介质的循环流路，设置在循环流路中的泵，设置用于检测供给的冷却介质温度的供给侧温度传感器，设置有排出侧温度传感器 以检测排出的冷却介质温度;以及冷启动控制器，其构造成在所述燃料电池堆的冷启动时由所述泵控制所述冷却介质的循环体积。 冷启动控制器估计燃料电池内部温度，并且基于内部温度和排出的冷却介质温度之间的大小关系，选择性地将冷却介质的循环体积设定在减小的体积和正常体积之间。 冷却启动控制器将冷却介质的循环量设定为增加的体积（最大循环量）后，在供给的冷却介质的温度与排出冷却介质的温度相等后，

公开(公告)号：US20190267645A1

公开(公告)日：2019-08-29

申请号：US16276748

申请日：2019-02-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryouichi NAMBA ,  Shuya KAWAHARA ,  Norihiro FUKAYA

IPC: H01M8/04119 ,  H01M8/0432 ,  H01M8/0438

Abstract: A fuel cell system includes a fuel cell, an oxidant gas supply and discharge system, a coolant circulation system, a compressor, an atmospheric pressure sensor, and a control unit. When a measured atmospheric pressure becomes lower than a predetermined reference atmospheric pressure, the control unit executes temperature and pressure lowering control for controlling the coolant circulation system to lower the temperature of the fuel cell while controlling a pressure-regulating valve to lower a delivery pressure of the compressor.

公开(公告)号：US20180108926A1

公开(公告)日：2018-04-19

申请号：US15725651

申请日：2017-10-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshiaki TSURUTA ,  Kohei ODA ,  Satoshi WATANABE ,  Hideyuki KUMEI ,  Shuya KAWAHARA

IPC: H01M8/04858 ,  H01M16/00 ,  H01M8/04746 ,  H01M8/04089

CPC classification number: H01M8/04953 ,  H01M8/04089 ,  H01M8/04223 ,  H01M8/04238 ,  H01M8/04753 ,  H01M8/04925 ,  H01M8/0494 ,  H01M10/48 ,  H01M16/006 ,  H01M2250/20 ,  Y02T90/32

Abstract: A fuel cell system of the present disclosure performs a first and a second catalyst activation process, and the first catalyst activation process is performed where a flow rate of the air supplied to the fuel cell by the air compressor is reduced to be less than that before the refresh control is performed while keeping an amount of a current drawn from the fuel cell by the fuel cell converter at the same value as that before the refresh control is performed, and the second catalyst activation process is performed where the value of the current drawn from the fuel cell by the fuel cell converter is increased to be greater than that before the refresh control is performed while keeping the flow rate of the air supplied to the fuel cell by the air compressor at the same value as that before the refresh control is performed.

公开(公告)号：US20210376356A1

公开(公告)日：2021-12-02

申请号：US17226417

申请日：2021-04-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuya KAWAHARA ,  Hiroyuki IMANISHI ,  Takeho AISAKA

IPC: H01M8/04746 ,  H01M8/04111

Abstract: Provided is a fuel cell system capable of suppressing the movement of an operating point of a compressor between a surge region and a non-surge region to reduce operation sounds and vibrations, the fuel cell system including at least: a fuel cell; a compressor; a dry state estimation part to estimate a dry state of the fuel cell; and a pressure target control part to control a pressure target, wherein the pressure target control part is capable of executing at least rise control and lower control, the rise control and the lower control being such that an operating point of the compressor is positioned outside a surge region, a current pressure target is corrected to the value same as a last pressure target if the current pressure target is lower (higher) than the last pressure target when the rise control (lower control) is being carried out.

公开(公告)号：US20210376355A1

公开(公告)日：2021-12-02

申请号：US17213512

申请日：2021-03-26

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shun MATSUMOTO ,  Yoshikatsu FUJIMURA ,  Shigeki HASEGAWA ,  Shuya KAWAHARA ,  Takeho AISAKA ,  Hiroyuki IMANISHI

IPC: H01M8/04746 ,  H01M8/04089 ,  H01M8/04858 ,  H01M8/04828 ,  H01M8/04303

Abstract: A fuel cell system including a fuel cell, an air compressor that supplies oxidant gas to the fuel cell, an upstream supply pipe provided with the air compressor, a downstream supply pipe connected to the upstream supply pipe and the fuel cell, an upstream discharge pipe connected to the fuel cell, a downstream discharge pipe connected to the upstream discharge pipe, a bypass pipe, a valve mechanism configured to be switchable between a supply state and a bypass state, and a controller configured to control the air compressor, the valve mechanism, and a power generation state of the fuel cell.

公开(公告)号：US20210376349A1

公开(公告)日：2021-12-02

申请号：US17326602

申请日：2021-05-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Shuya KAWAHARA ,  Shinobu OTSUKA

IPC: H01M8/04664 ,  H01M8/04537 ,  H01M8/04746 ,  H01M8/043

Abstract: A fuel cell system includes: a fuel cell in which a plurality of cells is stacked; a cathode gas supply unit that supplies a cathode gas to the fuel cell; a voltage sensor that measures the voltage of the fuel cell; and a control unit that maintains the voltage of the fuel cell within a predetermined voltage range by controlling a supply amount of the cathode gas during low-load operation in which a load is lower than in normal operation. The control unit determines that there is a cross-leakage abnormality in the fuel cell when the supply amount of the cathode gas required to maintain the voltage of the fuel cell within the predetermined voltage range exceeds a predetermined criterial threshold value during the low-load operation.