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公开(公告)号：US20200259360A1
公开(公告)日：2020-08-13
申请号：US16863350
申请日：2020-04-30
发明人： Shuichi Tagawa , Yousuke Takei
IPC分类号： H02J7/06 , H02M3/158 , H02J7/00 , H02J7/35 , H01M10/44 , H01M10/615 , H01M10/627 , H01M10/633 , H01M10/667 , H01M10/48
摘要： A battery module that includes a battery and a bidirectional DC-DC converter including a switching element that is arranged at a position where heat generated by the switching element is transmitted to the battery. The bidirectional DC-DC converter operates in a discharge mode in which DC power supplied from the battery is converted and supplied to an input/output unit, and in a charge mode in which DC power supplied from the input/output unit is converted and supplied to the battery. Moreover, a control unit forces the bidirectional DC-DC converter to operate in the discharge mode and to increase a switching frequency of the switching element in comparison with a switching frequency in normal driving, when a temperature in a periphery of the battery needs to be increased.
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2.发明授权公开(公告)号：US10148195B2
公开(公告)日：2018-12-04
申请号：US16021414
申请日：2018-06-28
发明人： Shuichi Tagawa , Hiroyuki Yasui
IPC分类号： H02M7/537
摘要： In a power converter that converts a direct-current voltage into three-phase alternating-current voltages and outputs the three-phase alternating-current voltages to a power system. The power converter includes a microprocessor that sets a dead time during which high-side switching elements and low-side switching elements are simultaneously off, and carries out switching. Moreover, the microprocessor performs dq transformation using complex numbers of phase currents, and detects an amplitude value of d-axis current or q-axis current. The microprocessor changes a phase difference to reduce the amplitude value of d-axis current or q-axis current. The microprocessor then performs dead-time compensation on the basis of the resulting phase difference.
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3.发明授权公开(公告)号：US10826318B2
公开(公告)日：2020-11-03
申请号：US16807302
申请日：2020-03-03
发明人： Shuichi Tagawa
IPC分类号： H02J7/34 , H02J7/00 , G01R19/00 , H01M10/44 , H02J1/00 , H02J3/38 , H02M3/156 , H02M7/5387 , H02M7/5395
摘要： A power storage apparatus includes a charge and discharge controller. To start a voltage increasing operation in a state where a smoothing capacitor is not charged, the charge and discharge controller supplies a nonrestrictive current to a voltage increasing and decreasing circuit after charging the smoothing capacitor with a restrictive current. When a second direct-current voltage is supplied to a second terminal, the charge and discharge controller charges the smoothing capacitor with an increased voltage by the voltage increasing operation after charging the smoothing capacitor with the restrictive current, reduces a potential difference between the charge voltage in the smoothing capacitor and the second direct-current voltage, and then closes a switch circuit.
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4.发明授权公开(公告)号：US10897190B2
公开(公告)日：2021-01-19
申请号：US16840851
申请日：2020-04-06
发明人： Yousuke Takei , Shuichi Tagawa
摘要： A storage device that includes a first switching circuit connected to a direct-current voltage bus and a second switching circuit connected between the first switching circuit and a DC-DC converter. A smoothing capacitor is connected between the DC-DC converter and the switching circuit. Moreover, the second switching circuit includes a pair of relays connected in series between the first switching circuit and the DC-DC converter and an inrush current prevention circuit connected in parallel with the series circuit of the relays. A first voltage sensor is connected to a node between the pair of relays and a second voltage sensor is connected between both terminals of the smoothing capacitor. A control unit determines the presence of welding at the relays on the basis of voltage values detected by the voltage sensors.
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5.发明申请公开(公告)号：US20200235664A1
公开(公告)日：2020-07-23
申请号：US16840851
申请日：2020-04-06
发明人： Yousuke Takei , Shuichi Tagawa
摘要： A storage device that includes a first switching circuit connected to a direct-current voltage bus and a second switching circuit connected between the first switching circuit and a DC-DC converter. A smoothing capacitor is connected between the DC-DC converter and the switching circuit. Moreover, the second switching circuit includes a pair of relays connected in series between the first switching circuit and the DC-DC converter and an inrush current prevention circuit connected in parallel with the series circuit of the relays. A first voltage sensor is connected to a node between the pair of relays and a second voltage sensor is connected between both terminals of the smoothing capacitor. A control unit determines the presence of welding at the relays on the basis of voltage values detected by the voltage sensors.
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公开(公告)号：US20200220370A1
公开(公告)日：2020-07-09
申请号：US16823546
申请日：2020-03-19
发明人： Shuichi Tagawa
摘要： A power storage apparatus includes a storage battery chargeable and dischargeable, a voltage stepping-up/down circuit that performs a voltage stepping-up operation of stepping up by PWM control a voltage supplied from the storage battery and outputting a stepped-up voltage to a high-voltage DC bus line, and a voltage stepping-down operation of stepping down by PWM control a voltage supplied from the high-voltage DC bus line and supplying a stepped-down voltage to the storage battery. Moreover, a detection device is provided that outputs a detection signal indicating a full-charged state of the storage battery, and a controller keeps a high-side switch in the voltage stepping-up/down circuit in an off state in response to input of the detection signal.
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公开(公告)号：US11522380B2
公开(公告)日：2022-12-06
申请号：US16823546
申请日：2020-03-19
发明人： Shuichi Tagawa
摘要： A power storage apparatus includes a storage battery chargeable and dischargeable, a voltage stepping-up/down circuit that performs a voltage stepping-up operation of stepping up by PWM control a voltage supplied from the storage battery and outputting a stepped-up voltage to a high-voltage DC bus line, and a voltage stepping-down operation of stepping down by PWM control a voltage supplied from the high-voltage DC bus line and supplying a stepped-down voltage to the storage battery. Moreover, a detection device is provided that outputs a detection signal indicating a full-charged state of the storage battery, and a controller keeps a high-side switch in the voltage stepping-up/down circuit in an off state in response to input of the detection signal.
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公开(公告)号：US11462933B2
公开(公告)日：2022-10-04
申请号：US16863350
申请日：2020-04-30
发明人： Shuichi Tagawa , Yousuke Takei
IPC分类号： H02J7/06 , H02M3/158 , H02J7/00 , H02J7/35 , H01M10/44 , H01M10/615 , H01M10/627 , H01M10/633 , H01M10/667 , H01M10/48
摘要： A battery module that includes a battery and a bidirectional DC-DC converter including a switching element that is arranged at a position where heat generated by the switching element is transmitted to the battery. The bidirectional DC-DC converter operates in a discharge mode in which DC power supplied from the battery is converted and supplied to an input/output unit, and in a charge mode in which DC power supplied from the input/output unit is converted and supplied to the battery. Moreover, a control unit forces the bidirectional DC-DC converter to operate in the discharge mode and to increase a switching frequency of the switching element in comparison with a switching frequency in normal driving, when a temperature in a periphery of the battery needs to be increased.
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公开(公告)号：US10700540B2
公开(公告)日：2020-06-30
申请号：US16124343
申请日：2018-09-07
发明人： Yuki Ishikura , Shuichi Tagawa
IPC分类号： H02J7/00 , H02J7/35 , H02J1/00 , H01L31/032 , H02S40/32 , H01L31/028 , H02S40/38 , H02J3/32 , H02J3/38
摘要： A DC power supply system that limits the number of times of charging/discharging of the storage battery when a DC load is connected to a DC bus line. The system includes a DC bus line connectable to a DC load; a power generation device for supplying electric power to the DC bus line; a secondary battery for supplying electric power to the DC bus line; a DC-AC converter connected between the DC bus line and an AC power system; and a controller that controls power supply from the power generation device, the secondary battery, and the DC-AC converter to the DC bus line, and when the power supply of the power generation device cannot satisfy a power supply request of the DC load, the controller controls the DC-AC converter to supply electric power in preference to the secondary battery from the power system.
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公开(公告)号：US20190006870A1
公开(公告)日：2019-01-03
申请号：US16124343
申请日：2018-09-07
发明人： Yuki Ishikura , Shuichi Tagawa
摘要： A DC power supply system that limits the number of times of charging/discharging of the storage battery when a DC load is connected to a DC bus line. The system includes a DC bus line connectable to a DC load; a power generation device for supplying electric power to the DC bus line; a secondary battery for supplying electric power to the DC bus line; a DC-AC converter connected between the DC bus line and an AC power system; and a controller that controls power supply from the power generation device, the secondary battery, and the DC-AC converter to the DC bus line, and when the power supply of the power generation device cannot satisfy a power supply request of the DC load, the controller controls the DC-AC converter to supply electric power in preference to the secondary battery from the power system.
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