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公开(公告)号：US20170274794A1
公开(公告)日：2017-09-28
申请号：US15504058
申请日：2016-01-20
Inventor： HIROSHI TENMYO , MUTSUHIKO TAKEDA , SHINICHI YUASA
Abstract: A battery status estimation device includes an SOC determination unit for determining whether a charge rate of a battery should be estimated based on a full charge capacity or a dischargeable capacity of the battery, a full charge capacity estimation unit for estimating the full charge capacity, a discharge capacity estimation unit for estimating the dischargeable capacity, and a current integrated estimation unit for estimating the charge rate of the battery based on the full charge capacity or the dischargeable capacity.
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公开(公告)号：US20240101240A1
公开(公告)日：2024-03-28
申请号：US18262204
申请日：2022-01-18
Inventor： MUTSUHIKO TAKEDA , SHINYA GESHI
Abstract: A watercraft propulsion device includes: a motor driving a propulsion unit; a battery supplying electric power to the motor; and a gas flow passage including one end communicating with the battery and another end communicating with a region that is outside a watercraft hull and is located lower than an upper end of a shell panel disposed at an edge of the watercraft hull, the gas flow passage exhausting a gas ejected from the battery from the other end to outside of the watercraft hull.
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公开(公告)号：US20240083283A1
公开(公告)日：2024-03-14
申请号：US18510738
申请日：2023-11-16
Inventor： YUSUKE ITAKURA , MUTSUHIKO TAKEDA , SHINYA NISHIKAWA
IPC: B60L53/62 , B60L53/68 , G01R31/374 , G01R31/382 , G07C5/00 , H01M10/42 , H01M10/44 , H01M10/48 , H02J7/00
CPC classification number: B60L53/62 , B60L53/68 , G01R31/374 , G01R31/382 , G07C5/008 , H01M10/425 , H01M10/44 , H01M10/486 , H02J7/0047 , H01M2010/4278 , H01M2220/20
Abstract: In a battery abnormality prediction system, an acquisition unit acquires a current flowing through a battery and a temperature of the battery. A prediction unit predicts the occurrence of an abnormality in the battery, based on a relationship between the amount of the current flowing through the battery for a certain period of time and a rise in the temperature of the battery for the certain period of time. The prediction unit may compare the ratio of an integrated amount of current to the temperature rise for the certain period of time with a threshold determined based on data on the battery having caught fire and thereby predict a sign of fire to be caught by the battery.
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Patent Agency Ranking
公开(公告)号：US20170366005A1
公开(公告)日：2017-12-21
申请号：US15538657
申请日：2016-07-27
Inventor： YASUMASA ISSHIKI , MUTSUHIKO TAKEDA , NORIHARU KOBAYASHI , JUN KIKUCHI
IPC: H02J1/10 , G01R19/165 , G01R31/36 , H02J7/00
CPC classification number: H02J1/10 , G01R19/16542 , G01R31/02 , G01R31/36 , G01R31/3658 , H01M10/482 , H02J7/00 , H02J7/0016 , H02J7/0021 , H02J7/0029 , H02J7/0068 , H02J7/02 , H02J2007/0039
Abstract: In management device (10) for managing power storage device (20) in which a plurality of power storage blocks (B1 to B3) in which a plurality of series circuits of fuses and power storage cells is connected in parallel is connected in series, equalization controller 15 performs, when a voltage difference among the power storage blocks exceeds a set voltage difference, a control for equalizing power storage blocks (B1 to B3). Fuse blowout determination unit 18 determines, based on a frequency of equalization performed by equalization controller 15, whether one of the fuses is blown.
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公开(公告)号：US20250076403A1
公开(公告)日：2025-03-06
申请号：US18725861
申请日：2023-01-06
Inventor： MUTSUHIKO TAKEDA , SHINYA NISHIKAWA
IPC: G01R31/396 , B60L3/00 , G01R31/3842 , G01R31/52 , H01M4/58 , H01M10/0525 , H01M10/42 , H01M10/48
Abstract: A data acquirer acquires voltage data and current data of a plurality of cells in a battery pack including the plurality of cells connected in series, or voltage data and current data of a plurality of parallel cell blocks in a battery pack including the plurality of parallel cell blocks each including a plurality of cells connected in parallel. Based on the voltage data and the current data of each of the cells or each of the parallel cell blocks, a dV/dQ estimator estimates dV/dQ indicating a differential value of the voltage with respect to the capacity of each of the cells or each of the parallel cell blocks. A determiner determines whether or not a micro-short circuit has occurred in the battery pack based on a change in variation of characteristic points of dV/dQ between the plurality of cells or the plurality of parallel cell blocks.
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公开(公告)号：US20250020731A1
公开(公告)日：2025-01-16
申请号：US18711877
申请日：2022-11-01
Inventor： SHINYA NISHIKAWA , YUSUKE ITAKURA , MUTSUHIKO TAKEDA , TAKASHI IIDA
IPC: G01R31/396 , G01K1/02 , G01K3/14 , G01R31/3835 , G01R31/52
Abstract: A battery abnormality detection system includes the following constituents. A battery data acquisition unit acquires voltages of one of a plurality of cells and a plurality of parallel cell blocks in a battery pack and temperatures at a plurality of observation points respectively measured by a plurality of temperature sensors provided in the battery pack. A determination unit determines presence or absence of an abnormality in one of a specific cell and a specific parallel cell block, based on a transition of a voltage of the one of the specific cell and the specific parallel cell block in a predetermined period in the battery pack and on a difference between a temperature change at a first observation point and a temperature change at a second observation point in the predetermined period in the battery pack.
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公开(公告)号：US20240174336A1
公开(公告)日：2024-05-30
申请号：US18262203
申请日：2022-01-07
Inventor： MUTSUHIKO TAKEDA
Abstract: A ship propulsion device includes: a motor; a battery; a temperature-adjustment-water flow path including a first route passing through a first exchanger capable of exchanging heat with the battery; a route switch unit switchable between a state which permits a flow of water to the first route and a state which restricts the flow of the water to the first route; a first temperature sensor which detects a temperature of the battery; a second temperature sensor which detects a temperature of the water; and a controller which controls the route switch unit. At least one of (i) when the battery temperature exceeds an upper limit value and the water temperature is lower than the battery temperature or (ii) when the battery temperature is lower than a lower limit value and the water temperature exceeds the battery temperature, the controller sets the route switch unit to the permitted state. At least one of (i) when the battery temperature exceeds the upper limit value and the water temperature exceeds the battery temperature, or (ii) when the battery temperature is lower than the lower limit value and the water temperature is lower than the battery temperature, the controller sets the route switch unit to the restricted state.
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公开(公告)号：US20220363384A1
公开(公告)日：2022-11-17
申请号：US17755324
申请日：2020-10-20
Inventor： RYOSUKE NAGASE , MUTSUHIKO TAKEDA
IPC: B64C39/02 , H02J7/00 , B64D27/24 , B64D35/04 , B64D35/08 , H01M50/204 , H01M10/42 , H01M10/44 , H01M50/249
Abstract: A plurality of energy storage packs (51 to 58) supply a current to a plurality of motor driver (31 to 38) that drive a plurality of motors (21 to 28) mounted on moving object (1), respectively. Sub energy storage pack (59) supplies a current to at least one of a plurality of first current paths connecting the plurality of motor driver (31 to 38) and the plurality of energy storage packs (51 to 58), or pulls a current from at least one of the plurality of first current paths. Controller (70) controls the plurality of first switches (S11 to S18) and the plurality of second switches (S21 to S28) to adjust capacities between the plurality of energy storage packs (51 to 58).
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