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公开(公告)号：US11933177B2
公开(公告)日：2024-03-19
申请号：US17335165
申请日：2021-06-01
发明人： Masayuki Ito
摘要： A ventilation system including a building having a space inside, a subterranean facility arranged in a basement of the building and having a subterranean space inside, a communication passage establishing communication between the space and the subterranean space, and a ventilation hole establishing communication between an earth outside the building and the subterranean space is provided. A fuel cell unit having an exhaust port is arranged in the subterranean space. The communication passage has a lateral wall protruding downward from a ceiling of the subterranean space. The lateral wall is arranged on the exhaust port side when the communication passage is arranged on a straight line linking the exhaust port and a second opening portion of the ventilation hole on the subterranean space side. The lateral wall is arranged on the straight line side when the communication passage is arranged at a position spaced apart from the straight line.
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公开(公告)号：US11462758B2
公开(公告)日：2022-10-04
申请号：US16542722
申请日：2019-08-16
发明人： Masayuki Ito
IPC分类号： H01M8/04858 , B60L58/30
摘要： A fuel cell system includes: a first fuel cell; a second fuel cell having a greater maximum power output than a maximum power output of the first fuel cell; and a controller configured to cause the first fuel cell to generate greater electric power greater than the second fuel cell when the requested power is smaller than a first threshold, cause the second fuel cell to generate greater electric power than the first fuel cell when the requested power is a second threshold, which is the first threshold or greater, or greater and is smaller than a third threshold that is greater than the second threshold and is greater than 50% of a sum of the maximum power outputs of the first and second fuel cells, and cause both the first and second fuel cells to generate electric power when the requested power is the third threshold or greater.
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公开(公告)号：US11450862B2
公开(公告)日：2022-09-20
申请号：US15815875
申请日：2017-11-17
发明人： Wataru Otsu , Naohiro Hoshikawa , Masayuki Ito , Takahiro Kato
IPC分类号： H01M8/026 , H01M8/0254 , H01M8/0206 , H01M8/1004
摘要： A separator for a fuel cell, includes a separator plate provided with a flow path groove group through which the reaction gas flows. The flow path groove group includes a single first flow path groove, a plurality of second flow path grooves, and a branch portion that connects an end portion of the first flow path groove to end portions of the second flow path grooves. The branch portion includes a narrow portion having a narrower groove width than a groove width of a remaining portion of the branch portion. A groove depth of the narrow portion is shallower than a groove depth of the remaining portion of the branch portion.
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公开(公告)号：US11094949B2
公开(公告)日：2021-08-17
申请号：US16718402
申请日：2019-12-18
发明人： Tomohiko Kaneko , Masayuki Ito
IPC分类号： H01M8/043 , H01M8/0438 , H01M8/04537 , H01M8/04746
摘要： A fuel cell system includes: a fuel cell; a supply device; and a control unit configured to lower output voltage of the fuel cell to a target value so as to execute recovery processing to recover power generation performance of the fuel cell. In a case of having an execution request of the recovery processing, the control unit restarts power generation of the fuel cell when open circuit voltage of the fuel cell is lowered to or smaller than a threshold value higher than the target value by controlling a flow rate of a cathode gas while the power generation of the fuel cell is paused, and the control unit executes the recovery processing while controlling an output current value of the fuel cell to be smaller than an idle current value that is an output current value of the fuel cell in an idle operation state.
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公开(公告)号：US11069912B2
公开(公告)日：2021-07-20
申请号：US16564593
申请日：2019-09-09
发明人： Masayuki Ito , Tomohiko Kaneko
IPC分类号： H01M8/04858 , H01M8/04007 , H01M8/04082 , H01M8/04111 , H01M8/04119 , H01M8/04701 , H01M8/04746 , H01M8/249
摘要： A fuel cell system includes: a first fuel cell stack and a second fuel cell stack; a supply passage connected to an inlet of oxidant gas in the first fuel cell stack; an discharge passage connected to an outlet of the oxidant gas in the second fuel cell stack; introduction unit that introduces water in the oxidant gas flowing through the discharge passage into the supply passage; and a controller configured to perform refresh control of the first fuel cell stack by lowering voltage of the first fuel cell stack, and operates, during the refresh control, the introduction unit while keeping the second fuel cell stack in an electric power generation state.
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公开(公告)号：US11799098B2
公开(公告)日：2023-10-24
申请号：US17654119
申请日：2022-03-09
发明人： Yuuki Kasahara , Masayuki Ito , Satoshi Andoh
IPC分类号： H01M8/04089 , H01M8/04537 , H01M8/04746 , H01M8/0438 , H01M8/04082
CPC分类号： H01M8/04097 , H01M8/04201 , H01M8/04388 , H01M8/04582 , H01M8/04753
摘要： To provide a fuel cell system configured to suppress the occurrence of partial fuel gas deficiency in a fuel cell. A fuel cell system wherein at least one injector selected from the group consisting of a first injector and a second injector is driven by duty ratio control to maintain a fuel gas pressure to the fuel cell within a predetermined range, in accordance with an output current value; wherein a controller determines whether or not the output current value is larger than a predetermined first threshold; and wherein, when the controller determines that the output current value is larger than the predetermined first threshold, the controller drives the first injector by duty ratio control, and the controller drives the second injector by duty ratio control to open a valve of the second injector at least while a valve of the first injector is closed.
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公开(公告)号：US11791726B2
公开(公告)日：2023-10-17
申请号：US17445724
申请日：2021-08-23
发明人： Masayuki Ito , Tomohiko Kaneko
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , H01M2250/20
摘要： To provide a power conversion device configured to evenly pass current through phases and to achieve high power conversion efficiency in a wide current range. A power conversion device comprising conversion parts which are coupled in parallel to each other, which are capable of voltage conversion, and each of which includes a coil, wherein the power conversion device comprises M (M is a natural number of 2 or more) sets of conversion sets including the conversion parts of N phases (N is a natural number of 2 or more), and the coils of the conversion parts are capable of magnetic coupling to each other; wherein the power conversion device includes a controller configured to change a driving phase number X of the conversion parts according to a system requirement.
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公开(公告)号：US11658557B2
公开(公告)日：2023-05-23
申请号：US17445720
申请日：2021-08-23
发明人： Tomohiko Kaneko , Masayuki Ito
IPC分类号： H02M1/00
CPC分类号： H02M1/0003
摘要： A control device for a converter including a one-phase or multiple-phase converter circuit includes: a magnetic coupling determination unit configured to determine whether the converter circuit is a magnetically coupled circuit in which a reactor of the converter circuit is in a magnetically coupled state; and a control unit configured to change a control method for the converter according to a determination result of the magnetic coupling determination unit.
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公开(公告)号：US11101488B2
公开(公告)日：2021-08-24
申请号：US16592332
申请日：2019-10-03
发明人： Masayuki Ito
IPC分类号： H01M8/249 , H01M8/0432 , H01M8/0438 , H01M8/04089 , H01M8/04858 , H01M8/04746
摘要： A fuel cell system includes a plurality of fuel cell stacks, a power generation control unit that controls power generation of the plurality of fuel cell stacks based on a required power for the plurality of fuel cell stacks, and a refreshing control unit configured to perform a refreshing process of decreasing a voltage on the plurality of fuel cell stacks. The refreshing control unit performs the refreshing process on the first fuel cell stack when the required power changes from a state in which the required power is less than a first predetermined value to a state in which the required power is equal to or greater than the first predetermined value and when the required power is in a range which is equal to or greater than the first predetermined value and less than the second threshold value.
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10.发明授权公开(公告)号：US10647212B2
公开(公告)日：2020-05-12
申请号：US15861356
申请日：2018-01-03
发明人： Masaaki Matsusue , Yasushi Araki , Masayuki Ito
IPC分类号： B60L1/02 , B60L11/18 , H01M8/04298 , H01M8/04537 , H01M16/00 , B60L58/40 , B60L58/12
摘要： An output prediction device for a fuel cell includes: a first acquisition circuitry configured to acquire a first required output of the fuel cell, the first required output being calculated based on a predicted vehicle speed or a predicted acceleration of a vehicle on a scheduled traveling route for the vehicle, the vehicle traveling by using the fuel cell as a dynamic power source; a second acquisition circuitry configured to acquire a second required output of the fuel cell, the second required output being required by an air-conditioning device of the vehicle; and a calculation circuitry configured to calculate a parameter correlated with a predicted output value of the fuel cell, based on the first required output and the second required output, the predicted output value being predicted as an output on the scheduled traveling route.
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