公开(公告)号：US20210367251A1

公开(公告)日：2021-11-25

申请号：US17207832

申请日：2021-03-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi TOIDA ,  Mahiro OZEKI ,  Yusuke NISHIDA ,  Ryouichi NAMBA

IPC: H01M8/04223 ,  H01M8/04007 ,  H01M8/04225 ,  H01M8/04302 ,  H01M8/04992 ,  H01M8/0432 ,  H01M8/04701

Abstract: A fuel cell system includes a fuel cell stack, a temperature measurement unit, and a controller. The controller is configured to, when the stack temperature is equal to or lower than a predetermined first threshold temperature at the time of startup of the fuel cell system, control a heat generation amount per unit time of the fuel cell stack to a set heat generation amount to perform a warming-up operation until the stack temperature increases to a target temperature, and when the stack temperature is equal to or higher than a predetermined second threshold temperature, execute at least one of setting the target temperature to be lower than the target temperature when the stack temperature is lower than the second threshold temperature and setting the set heat generation amount to be smaller than the set heat generation amount when the stack temperature is lower than the second threshold temperature.

公开(公告)号：US20180166716A1

公开(公告)日：2018-06-14

申请号：US15819390

申请日：2017-11-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroyuki IMANISHI ,  Tomio YAMANAKA ,  Masashi TOIDA

IPC: H01M8/04298 ,  H01M8/04313 ,  H01M8/04082

CPC classification number: H01M8/04298 ,  H01M8/04082 ,  H01M8/04097 ,  H01M8/04268 ,  H01M8/04302 ,  H01M8/04313 ,  H01M8/04402 ,  H01M8/04664 ,  H01M8/04753 ,  H01M8/04761

Abstract: A fuel cell system includes a fuel cell, an oxidizing gas supplier, an oxidizing gas supply pipe, an oxidizing gas discharge pipe, a fuel gas supply pipe, a fuel gas return pipe, a fuel gas discharge valve, and a controller. The controller executes valve closing control to close the fuel gas discharge valve; and determines the flow rate of a diluent gas to be supplied to an oxidizing gas supply portion by the oxidizing gas supplier according to the flow rate of a leakage gas flowing from the fuel gas discharge valve to the oxidizing gas discharge pipe after the execution of the valve closing control. The flow rate of the diluent gas to be supplied to the oxidizing gas supply portion is determined to increase as the flow rate of the leakage gas increases.

公开(公告)号：US20160380289A1

公开(公告)日：2016-12-29

申请号：US15180436

申请日：2016-06-13

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohiro OGAWA ,  Tsuyoshi MARUO ,  Masashi TOIDA ,  Yoshiaki NAGANUMA

IPC: H01M8/04492 ,  H01M8/04537

CPC classification number: H01M8/04529 ,  H01M8/04291 ,  H01M8/04358 ,  H01M8/04589 ,  H01M8/04649 ,  H01M8/04753 ,  H01M2008/1095

Abstract: An object is to provide a technique of enhancing the accuracy of estimation of the water content of a fuel cell on the occurrence of localized drying of an electrolyte membrane. In a fuel cell system, until satisfaction of a second condition indicating that localized drying of the electrolyte membrane is eliminated after satisfaction of a first condition indicating that localized drying of the electrolyte membrane occurs, a water content estimator performs a second water content estimation process that estimates the water content of the fuel cell based on an output current value of the fuel cell, in place of a first water content estimation process that estimates the water content of the fuel cell based on an impedance of the fuel cell. The first condition is that an oxidizing gas stoichiometric ratio is equal to or higher than a predetermined reference value and that a first elapsed time has elapsed since the oxidizing gas stoichiometric ratio becomes equal to or higher than the predetermined reference value. The second condition is that an accumulated current value by accumulation of the output current value for a second elapsed time since satisfaction of the first condition is equal to or greater than a reference value of accumulated current value or that the oxidizing gas stoichiometric ratio is lower than the predetermined reference value and that a third elapsed time has elapsed since the oxidizing gas stoichiometric ratio becomes lower than the predetermined reference value.

Abstract translation: 本发明的目的是提供一种在电解质膜的局部干燥发生时提高燃料电池的含水量的估计精度的技术。 在燃料电池系统中，在满足表示发生电解质膜的局部干燥的第一状态满足表示电解质膜的局部干燥的第二状态的满足之后，水含量估计器进行第二含水量估计处理， 基于燃料电池的输出电流值来估计燃料电池的含水量，代替基于燃料电池的阻抗来估计燃料电池的含水量的第一含水量估计处理。 第一条件是氧化剂化学计量比等于或高于预定参考值，并且从氧化气体化学计量比变为等于或高于预定参考值开始经过第一经过时间。 第二个条件是，由于满足第一条件后的第二经过时间的输出电流值的积累的累积电流值等于或大于累积电流值的基准值或氧化剂气体化学计量比低于 从氧化剂气体化学计量比变得低于规定的基准值以来，经过了规定的基准值，经过了第3次的经过时间。

公开(公告)号：US20160380287A1

公开(公告)日：2016-12-29

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: H01M8/04223 ,  H01M8/04302 ,  B60L11/18 ,  H01M8/04007 ,  H01M8/04828 ,  H01M16/00 ,  H01M8/0432

CPC classification number: H01M8/04253 ,  B60L11/1885 ,  B60L11/1894 ,  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.

Abstract translation: 本发明的目的是提供一种技术，其中，由于燃料电池系统安装在车辆上的温度降低，减少了启动燃料电池系统的潜在故障。 提供了一种车辆，其包括燃料电池系统，电池，电动机和确定器，其被配置为当由温度测量单元测量的温度等于或低于预定的第一温度时，确定燃料电池系统具有冷冻部分 温度和条件（1）至（3）中的至少一个被满足：（1）在从车辆的接通状态改变到车辆的关闭状态之后不执行清除处理; （2）在车辆的关闭状态下环境温度下降到或低于预定的第二温度，并且不执行净化处理; 和（3）车辆的倾斜度在从车辆的关闭状态到车辆的接通状态的变化时等于或大于预定的倾斜度。

公开(公告)号：US20210376358A1

公开(公告)日：2021-12-02

申请号：US17218361

申请日：2021-03-31

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi TOIDA ,  Tomotaka ISHIKAWA ,  Yusuke NISHIDA

IPC: H01M8/04858 ,  H01M8/04302 ,  H01M8/0432 ,  H01M8/04537

Abstract: A fuel cell system includes a fuel cell a temperature acquisition unit that acquires a temperature of the fuel cell, a cell unit voltage sensor that detects a voltage of each of fuel cell units, and a controller that controls the fuel cell system. The controller restricts an output current of the fuel cell when the voltage of the individual fuel cell unit becomes equal to or lower than a predetermined value in a warm-up operation, execute the warm-up operation when the temperature of the fuel cell is equal to or lower than a predetermined temperature, after the fuel cell system receives a start-up request, and stop an operation of the fuel cell system when a stop condition including that the voltage of the fuel cell unit is continuously equal to or lower than a predetermined voltage value for a predetermined time is satisfied after start of the warm-up operation.

公开(公告)号：US20210367245A1

公开(公告)日：2021-11-25

申请号：US17206580

申请日：2021-03-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yusuke NISHIDA ,  Tomotaka ISHIKAWA ,  Masashi TOIDA

IPC: H01M8/04089 ,  H01M8/04746

Abstract: A fuel cell system 1 is provided with a fuel cell 10 including a hydrogen passage 10h, a hydrogen supply path 31 connected to an inlet of a hydrogen passage, an injector 44 arranged in the hydrogen supply path, an anode off gas passage AP connected to an outlet of the hydrogen passage, and a drain control valve 46 provided in the anode off gas passage. Hydrogen replacement is performed in which the injector is opened so that a pressure inside the hydrogen passage becomes a required hydrogen pressure while the drain control valve is opened. The fuel cell system 1 is further provided with a pressure sensor 94a detecting the pressure inside the hydrogen passage. Hydrogen replacement is not performed when it is judged that the pressure inside the hydrogen passage is higher than the required hydrogen pressure.

公开(公告)号：US20210210777A1

公开(公告)日：2021-07-08

申请号：US17076753

申请日：2020-10-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masahiro ITO ,  Masashi TOIDA ,  Hiroyuki TSUNEKAWA ,  Tsuyoshi MARUO

IPC: H01M8/04746 ,  H01M8/04223 ,  H01M8/04082 ,  H01M8/04701

Abstract: A fuel cell system includes a fuel cell, a hydrogen tank, a hydrogen supply passage connecting the hydrogen tank and the fuel cell, a cutoff valve configured to cut off circulation of hydrogen in the hydrogen supply passage, a detection unit configured to detect a start of filling of the hydrogen tank with hydrogen, and a purge controller configured to close the cutoff valve in a case where the fuel cell system is stopped and the detection unit detects the start of filling with hydrogen in a state in which purge processing of purging the in-cell hydrogen flow passage is to be executed, and to execute processing of purging the in-cell hydrogen flow passage by causing hydrogen remaining on a downstream side of the cutoff valve in a hydrogen flow in the hydrogen supply passage to flow in the in-cell hydrogen flow passage as the purge processing.

公开(公告)号：US20210013529A1

公开(公告)日：2021-01-14

申请号：US16884250

申请日：2020-05-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi TOIDA ,  Tsuyoshi MARUO ,  Hiroyuki TSUNEKAWA

IPC: H01M8/04303 ,  H01M8/04119 ,  H01M8/04228 ,  H01M8/04223 ,  H01M8/04746 ,  H01M8/0438

Abstract: A fuel cell system comprises: a gas-liquid separator separating exhaust gas of a fuel cell stack into a liquid component and a gas component and storing liquid water of the liquid component; a circulation pipe; a drain pipe discharging the liquid water; and a drain valve opening and closing the drain pipe. In an end scavenging process that is executed when operation of the fuel cell system is finished, the control unit opens the drain valve when a valve opening condition for the drain valve is satisfied. The valve opening condition is set such that an amount of the liquid water stored in the gas-liquid separator at the time the drain valve is opened in the end scavenging process is larger than an amount of the liquid water stored in the gas-liquid separator at the time the drain valve is opened during normal operation of the fuel cell system.

公开(公告)号：US20180034076A1

公开(公告)日：2018-02-01

申请号：US15638540

申请日：2017-06-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shigeki HASEGAWA ,  Masashi TOIDA

IPC: H01M8/0432 ,  H01M8/04029 ,  H01M8/24 ,  H01M8/04746 ,  H01M8/04537 ,  H01M8/04007 ,  H01M8/04701

Abstract: There is provided a fuel cell system comprising a first fuel stack, a first temperature gauge configured to measure a first temperature value, a power generation voltage meter configured to measure a power generation voltage, a cell voltage meter and a controller configured to control a temperature regulating mechanism such as to perform a temperature rise of the fuel cell stack. The controller is further configured to start the temperature rise of the fuel cell stack when a cell voltage is lower than a predetermined voltage value. When at least one of a plurality of time measurement conditions is satisfied after the first temperature value has reached a first reference temperature after a start of the temperature rise, the controller measures a time duration during which a voltage difference by subtracting the cell voltage from an average voltage of cells is maintained to be not greater than a predetermined voltage difference. When the measured time duration has reached a first reference time, the controller terminates the temperature rise. The plurality of time measurement conditions are conditions that predetermined time periods have elapsed since termination of a warm-up operation, since termination of an intermittent operation, since termination of regenerative braking and since a shift of the state of the fuel cell stack to a power generation capable state.

公开(公告)号：US20180026287A1

公开(公告)日：2018-01-25

申请号：US15608955

申请日：2017-05-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shigeki HASEGAWA ,  Masashi TOIDA

IPC: H01M8/04746 ,  H01M8/04537 ,  H01M8/0438

CPC classification number: H01M8/04746 ,  H01M8/0438 ,  H01M8/04559 ,  H01M8/04753

Abstract: A fuel cell system, comprising: a fuel cell stack configured to include a plurality of cells; a number “n” of injectors arranged in parallel to supply an anode gas to the fuel cell stack, where the number “n” represents an integral number of not less than 2; a cell voltage meter configured to measure a voltage of at least one cell among the plurality of cells; a pressure gauge configured to measure a supply pressure that is a pressure of the anode gas supplied to the fuel cell stack; and a controller configured to respectively input control signals into the number “n” of injectors by using the voltage measured by the cell voltage meter and the supply pressure measured by the pressure gauge and to control a driving number that denotes a number of injectors to be driven among the number “n” of injectors, wherein when the measured voltage is equal to or higher than a predetermined voltage value, the controller is configured to set a target value of the supply pressure and the driving number according to a required electric power, when the measured voltage is lower than the predetermined voltage value, the controller is configured to perform a first control that fixes the driving number to the number “n” while setting a target value for purging that is a higher value than the target value according to the required electric power to the target value of the supply pressure, and when the supply pressure reaches the target value for purging by the first control, the controller is configured to perform a second control that cancels fixation of the driving number while continuing setting the target value for purging to the target value of the supply pressure.