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公开(公告)号：US20220094191A1
公开(公告)日：2022-03-24
申请号：US17428144
申请日：2019-02-04
Applicant: TDK Corporation
Inventor： Shingo SUZUKI , Katsuo NAOI , Takuma MITSUNAGA
Abstract: A DC power supply system includes: a DC bus serving as a bus bar for DC power supply; a natural energy power generator 30 that supplies generated power to the DC bus; a plurality of storage batteries that store the generated power from the natural energy power generator; a plurality of bidirectional DC-DC converters that connect the plurality of corresponding storage batteries to the DC bus; a power management apparatus that manages operations of the plurality of bidirectional DC-DC converters; and a target voltage corrector that calculates a correction value of a target value for the output voltage by using an average value of a plurality of actual measurement values of each output voltage of the bidirectional DC-DC converters. The power management apparatus individually controls the each output voltage of the bidirectional DC-DC converters by using each target value of the output voltages corrected based on the correction value.
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公开(公告)号：US20230291222A1
公开(公告)日：2023-09-14
申请号：US17967648
申请日：2022-10-17
Applicant: TDK Corporation
Inventor： Takuma MITSUNAGA , Shingo SUZUKI , Katsuo NAOI , Masao ICHI , Hisakazu UTO
CPC classification number: H02J7/00712 , H02J7/34 , H02J7/0048 , H02M1/008 , H02J2207/20
Abstract: A power management device includes a control unit that switches an operation mode of a power feeding system by controlling a converter capable of bidirectionally converting between an internal bus voltage and an external bus voltage. The control unit sets the power feeding system to a power reception mode by setting a target value of the external bus voltage in the converter to a first target value when the amount of stored electric power is less than a first storage threshold value. The control unit sets the power feeding system to a power transmission mode by setting the target value to a second target value that is larger than the first target value when the amount of stored electric power exceeds a second storage threshold value that is larger than the first storage threshold value and a measured value of the external bus voltage exceeds a transmission threshold value.
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公开(公告)号：US20230155391A1
公开(公告)日：2023-05-18
申请号：US17640493
申请日：2020-03-25
Applicant: TDK CORPORATION
Inventor： Takuma MITSUNAGA , Katsuo NAOI , Shingo SUZUKI , Hisakazu UTO , Masao ICHI
CPC classification number: H02J3/46 , H02J3/381 , H02J7/35 , H02J3/32 , H02J2300/20 , H02J2207/20
Abstract: A power feeding system includes a direct current (DC) bus for supplying DC power, a renewable energy power generation device connected to the DC bus, a first converter connected to the DC bus and converting a bus voltage supplied to the DC bus into a load voltage supplied to a load device, a storage battery, a second converter provided between the storage battery and the DC bus and capable of bidirectionally converting the bus voltage and a battery voltage of the storage battery, and a power management device controlling the second converter to charge and discharge the storage battery. The power management device controls the second converter to change the bus voltage based on difference power obtained by subtracting load power supplied to the load device from supply power supplied to the DC bus, the supply power including generated power generated by the renewable energy power generation device.
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公开(公告)号：US20230006282A1
公开(公告)日：2023-01-05
申请号：US17640471
申请日：2020-03-23
Applicant: TDK CORPORATION
Inventor： Katsuo NAOI , Takuma MITSUNAGA , Shingo SUZUKI , Masao ICHI , Hisakazu UTO
IPC: H01M10/6563 , H01M10/48 , H01M10/635 , H02J7/00
Abstract: A power management device is a power management device that controls a temperature inside a housing in a power storage system that includes a power storage device including a storage battery and the housing for housing the power storage device. The power management device includes an acquisition unit that acquires status information indicating a status of the power storage system, a calculation unit that calculates a target temperature in the housing based on an allowable capacity deterioration rate of the storage battery, and an air volume control unit that controls an air volume of a fan provided in the housing based on the status information and the target temperature.
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公开(公告)号：US20160028227A1
公开(公告)日：2016-01-28
申请号：US14776937
申请日：2014-03-06
Applicant: TDK CORPORATION
Inventor： Shingo SUZUKI , Kensaku ASAKURA , Takahiro FUJIMORI , Kiyoshi HATANAKA
Abstract: The present invention relates to an electrostatic discharge protection device provided with an insulating laminate containing a first and a second insulating substrate stacked there, a first and a second discharge electrode disposed inside the insulating laminate, a first insulating layer having glass disposed on the side surfaces of the first and the second discharge electrodes, a second insulating layer having glass disposed on the main surfaces of the first and the second discharge electrodes, and an discharge inducing section disposed between the side surfaces of the first and the second discharge electrode, wherein, the distance between the side surfaces of the first and the second discharge electrodes was set as ΔG and the thickness of the second insulating layer was set as ΔZ which two adapt to inequations 3 μm≦ΔZ≦35 μm and ΔG≦40 μm.
Abstract translation: 本发明涉及一种静电放电保护装置，该静电放电保护装置设置有绝缘层叠体，该绝缘层叠体包含堆叠在其上的第一绝缘基板和第二绝缘基板，设置在绝缘层叠体的内部的第一和第二放电电极，设置在侧面上的玻璃的第一绝缘层 的第一和第二放电电极的第二绝缘层，设置在第一和第二放电电极的主表面上的玻璃的第二绝缘层和设置在第一和第二放电电极的侧表面之间的放电感应部分， 将第一和第二放电电极的侧表面之间的距离设置为＆Dgr; G，并且将第二绝缘层的厚度设为＆Dgr; Z，其适应不等式3μm＆nlE;＆Dgr; Z＆nlE;35μm和＆Dgr ; G＆nlE;40μm。
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Patent Agency Ranking
公开(公告)号：US20230333529A1
公开(公告)日：2023-10-19
申请号：US17979247
申请日：2022-11-02
Applicant: TDK CORPORATION
Inventor： Masao ICHI , Shingo SUZUKI , Takuma MITSUNAGA , Katsuo NAOI , Hisakazu UTO
IPC: G05B19/042 , H02J3/38 , H02J3/32
CPC classification number: G05B19/042 , H02J3/381 , H02J3/32 , H02J2207/20 , H02J2300/20 , G05B2219/2639
Abstract: A power management device includes a control unit that controls a converter capable of bidirectionally converting between an external bus voltage and an internal bus voltage in a first power feeding system. When an amount of stored electric power of the first power feeding system is less than a first storage threshold value, the control unit sets a target value of the external bus voltage to a first power reception target value corresponding to a first transmission power value in a first power transmission request transmitted to an upper power management device. When the amount of stored electric power exceeds a second storage threshold value, the control unit sets the target value of the external bus voltage to a first power transmission target value corresponding to a second transmission power value in a second power transmission request received from a second power feeding system.
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公开(公告)号：US20230333525A1
公开(公告)日：2023-10-19
申请号：US17968271
申请日：2022-10-18
Applicant: TDK Corporation
Inventor： Masao ICHI , Shingo SUZUKI , Takuma MITSUNAGA , Katsuo NAOI , Hisakazu UTO
CPC classification number: G05B15/02 , H02J3/381 , G01R21/06 , H02J2300/20 , H02J2207/20
Abstract: An upper power management device includes: an update unit that updates a target value of interest based on a received power value of electric power received by a first power feeding system that is making a power transmission request, and a transmitted power value of electric power transmitted by a second power feeding system that is responding to the power transmission request, the target value of interest including at least one of a power reception target value of an external bus voltage in a first converter of the first power feeding system, and a power transmission target value of the external bus voltage in a second converter of the second power feeding system; and an output unit that outputs a first setting command for setting the power reception target value in the first converter and a second setting command for setting the power transmission target value in the second converter.
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公开(公告)号：US20210050738A1
公开(公告)日：2021-02-18
申请号：US16969322
申请日：2018-02-21
Applicant: TDK CORPORATION
Inventor： Shingo SUZUKI , Katsuo NAOI , Takuma MITSUNAGA
Abstract: An energy management system (controller) operates on a charging voltage Vba of a specified storage battery out of storage batteries control power converting operations by bidirectional DC/DC converters. The energy management system controls the power converting operations of the respective bidirectional DC/DC converters so that the SOC of the specified storage battery is always higher than the SOCs of the other storage batteries, executes supplying of power from the other storage batteries to the DC bus with priority over supplying of power from the specified storage battery to the DC bus, and causes the corresponding bidirectional converters to stop the supplying of power from the other storage batteries the DC bus when the SOCs of the storage batteries have fallen below a lower limit value set in advance due to the supplying of power to the DC bus.
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公开(公告)号：US20230344244A1
公开(公告)日：2023-10-26
申请号：US17919586
申请日：2021-02-15
Applicant: TDK CORPORATION
Inventor： Takuma MITSUNAGA , Shingo SUZUKI , Masao ICHI , Katsuo NAOI , Hisakazu UTO
CPC classification number: H02J7/0014 , H02J7/0049 , H01M10/46 , H01M10/425 , H02J2207/20 , H01M2010/4271
Abstract: A power management device includes: a first determination unit that determines whether or not an execution condition for executing cell balancing for equalizing states of charge of a plurality of battery cells included in a storage battery connected to a direct current (DC) bus via a converter is satisfied; and a control unit that performs cell balancing execution control for causing a battery management device managing the storage battery to execute the cell balancing when the execution condition is satisfied. The control unit changes a target voltage of the converter so that a state of charge of the storage battery becomes a state in which the battery management device starts the cell balancing in the cell balancing execution control.
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公开(公告)号：US20210066929A1
公开(公告)日：2021-03-04
申请号：US16961036
申请日：2018-01-23
Applicant: TDK CORPORATION
Inventor： Shingo SUZUKI , Katsuo NAOI , Takuma MITSUNAGA
Abstract: Fluctuations in the battery life of a plurality of storage batteries are reduced. A DC power supplying system includes power conditioners that supply generated power of power generators to a DC bus, converters that perform voltage conversion on a bus voltage and supply load power to load appliances, bidirectional converters that execute charging operations that charge storage batteries and discharging operations that discharge the storage batteries, and an energy management system that causes the converters to execute a charging operation when the generated power exceeds the load power and to execute a discharging operation when the generated power is below the load power. During a charging operation, the energy management system applies a first voltage-current characteristic that linearly increases the charging current in keeping with an increase in the bus voltage to each bidirectional DC/DC converter with a slope in keeping with the SOC of a storage battery.
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