公开(公告)号：US20200251761A1

公开(公告)日：2020-08-06

申请号：US16752904

申请日：2020-01-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohiko KANEKO ,  Masayuki ITO ,  Hideyuki KUMEI

IPC: H01M8/04858 ,  H01M8/0438

Abstract: A fuel cell system includes a fuel cell, a supply device configured to supply a cathode gas to the fuel cell; and a control unit configured to execute recovery processing of causing a catalyst of the fuel cell to recover from performance deterioration by lowering an output voltage of the fuel cell. The control unit is configured to, when the recovery processing that has been executed is completed, control the supply device to place the fuel cell in a power generation paused state while making a stoichiometric ratio of the cathode gas lower than a stoichiometric ratio of the cathode gas in a normal operation state that is a state before execution of the recovery processing.

公开(公告)号：US20160072139A1

公开(公告)日：2016-03-10

申请号：US14778249

申请日：2013-03-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masato NAKAJIMA ,  Hideyuki KUMEI ,  Hiromichi SATOU

IPC: H01M8/04 ,  H01M4/86 ,  H01M8/10

CPC classification number: H01M8/04201 ,  H01M4/8605 ,  H01M8/0258 ,  H01M8/0273 ,  H01M8/10 ,  H01M8/1004 ,  H01M8/241 ,  H01M8/2457 ,  H01M2250/20 ,  Y02T90/32

Abstract: A fuel cell comprises: a membrane electrode assembly configured to have an electrolyte membrane joined between an anode electrode and a cathode electrode; a flow path-forming member configured to form a flow path that is adjacent to one electrode out of the anode electrode and the cathode electrode and makes a flow of a reactive gas to the one electrode; and a plate-like member made of a material of blocking the reactive gas and stacked on a portion of a flow path-side surface of the one electrode to be adjacent to the flow path. The plate-like member has a gas permeation structure allowing for permeation of the reactive gas in a part where the anode electrode and the cathode electrode are placed in a stacking direction of the plate-like member on the one electrode.

Abstract translation: 燃料电池包括：膜电极组件，被配置为具有连接在阳极电极和阴极电极之间的电解质膜; 流路形成部件，被配置为形成与所述阳极电极和所述阴极电极之外的一个电极相邻的流路，并使反应气体流向所述一个电极; 以及由阻挡反应性气体并层叠在与该流路相邻的一个电极的流路侧面的一部分上的材料构成的板状部件。 板状构件具有允许在一个电极上的板状构件的堆叠方向上放置阳极电极和阴极电极的部分中的反应性气体渗透的气体渗透结构。

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：US20140272651A1

公开(公告)日：2014-09-18

申请号：US14290273

申请日：2014-05-29

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki KUMEI ,  Manabu KATO

IPC: H01M8/04

CPC classification number: H01M8/04932 ,  H01M8/04082 ,  H01M8/04225 ,  H01M8/04238 ,  H01M8/04253 ,  H01M8/04268 ,  H01M8/0432 ,  H01M8/04365 ,  H01M8/04552 ,  H01M8/04582 ,  H01M8/04641 ,  H01M8/04753 ,  H01M8/04761 ,  H01M8/04873 ,  H01M8/0488 ,  H01M8/0494 ,  H01M8/2457

Abstract: An IR resistance of each of unit cells is measured, and a highest unit cell voltage as a threshold voltage is set based on the IR resistance and load current. The setting of the highest unit cell voltage uses map data that approximates current-voltage characteristics of a unit cell when the fuel gas is insufficiently supplied. In that case, the highest unit cell voltage is determined based on the voltage with respect to the load current obtained from the map data, and the IR loss calculated from the IR resistance and the load current. This highest unit cell voltage is compared with the measured unit cell voltage. If the unit cell voltage is below the highest unit cell voltage, the power generation of the fuel cell is stopped or restrained.

Abstract translation: 测量每个单元电池的IR电阻，并且基于IR电阻和负载电流来设置作为阈值电压的最高单位电池电压。 当燃料气体供应不足时，最高单位电池电压的设置使用近似于单位电池的电流 - 电压特性的地图数据。 在这种情况下，基于从地图数据获得的负载电流的电压和从IR电阻和负载电流计算的IR损耗来确定最高单位电池电压。 将该最高单位电池电压与测得的单位电池电压进行比较。 如果单体电池电压低于最高单位电池电压，则停止或抑制燃料电池的发电。

公开(公告)号：US20200185739A1

公开(公告)日：2020-06-11

申请号：US16694126

申请日：2019-11-25

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masayuki ITO ,  Hideyuki KUMEI ,  Tomohiko KANEKO

IPC: H01M8/04119 ,  H01M8/2484 ,  H01M8/249

Abstract: A fuel cell system includes a first fuel cell stack having a discharge manifold, a second fuel cell stack having a discharge manifold, a first auxiliary machine used for power generation of the first fuel cell stack, a second auxiliary machine used for power generation of the second fuel cell stack, and a controller configured to control operation of the first auxiliary machine and the second auxiliary machine. The controller is configured to control operation of the first auxiliary machine and the second auxiliary machine, such that one of the first fuel cell stack and the second fuel cell stack, of which a discharge direction of reaction gas discharged from the discharge manifold forms a smaller angle with a vertical downward direction, starts generating power earlier than the other fuel cell stack, after power generation of the first fuel cell stack and the second fuel cell stack is stopped.

公开(公告)号：US20200153011A1

公开(公告)日：2020-05-14

申请号：US16601931

申请日：2019-10-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki KUMEI

IPC: H01M8/04746 ,  H01M8/04119 ,  H01M8/249 ,  H01M8/04828

Abstract: A fuel cell system includes: first and second injectors; first and second ejectors; a first circulation passage configured to circulate anode gas that has passed the first ejector between the first fuel cell and the first ejector; a second circulation passage configured to circulate the anode gas that has passed the second ejector between the second fuel cell and the second ejector; a communication passage communicating with the first and second circulation passages; a switching valve configured to switch the communication passage to a communication state where the first and second circulation passages communicate with each other or to a cutoff state where the first and second circulation passages are cut off; and a controller configured to scavenge the first fuel cell by injecting the anode gas with the first injector, while the first fuel cell stops power generation in the communication state.

公开(公告)号：US20200185736A1

公开(公告)日：2020-06-11

申请号：US16688357

申请日：2019-11-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masayuki ITO ,  Hideyuki KUMEI ,  Tomohiko KANEKO

IPC: H01M8/04828 ,  H01M8/0432

Abstract: A fuel cell system includes: a fuel cell unit; a temperature acquiring unit acquiring an ambient temperature of a first fuel cell stack of the fuel cell unit; and a power generation control unit. The power generation control unit is configured to, when required power for the fuel cell unit is less than a predetermined threshold value, temporarily stop power generation of the first fuel cell stack and to switch the first fuel cell stack from stopped power generation to power generation when a continuous power generation stopped time of the first fuel cell stack is greater than a predetermined time such that the continuous power generation stopped time is shorter when the ambient temperature is equal to or lower than a predetermined temperature based on a temperature at which liquid water in the first fuel cell stack freezes than when the ambient temperature is higher than the predetermined temperature.

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.