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公开(公告)号：US20230246478A1
公开(公告)日：2023-08-03
申请号：US18002854
申请日：2021-04-26
申请人： FDK CORPORATION
发明人： Katsuhiko Tamaki , Yasuyuki Katsube , Naoaki Konda
CPC分类号： H02J9/06 , H02J7/007182 , H02J7/0063
摘要： Provided is a backup power supply that efficiently supplies power under the control of a microcomputer. The backup power supply is charged by a rectifier for generating power of a predetermined voltage, and supplies power to a load device operating with power supplied from the rectifier when the supplied power is insufficient. The backup power supply includes a secondary battery to be charged with power from the rectifier, a control unit for controlling charging and discharging of the secondary battery, and an input/output voltage detection unit for detecting the output voltage from the rectifier. The control unit stops charging of the secondary battery or reduces a charging current flow of the secondary battery when the output voltage drops to a first threshold voltage or less.
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公开(公告)号：US20230393201A1
公开(公告)日：2023-12-07
申请号：US18201216
申请日：2023-05-24
申请人： FDK CORPORATION
IPC分类号： G01R31/367 , G01R31/387 , G01R31/374 , H02J9/06
CPC分类号： G01R31/367 , G01R31/387 , G01R31/374 , H02J9/061
摘要： A power storage control apparatus includes a processor that computes a remaining charge time of a power storage apparatus that supplies power to a load apparatus operating by power supply from an external power source in case of a power supply emergency of the external power source, and the processor computes the remaining charge time of the power storage apparatus based on linear approximation of correlation between an operating environment of the power storage apparatus and a charge time of the power storage apparatus including a charge stop time.
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公开(公告)号：US11996730B2
公开(公告)日：2024-05-28
申请号：US17999636
申请日：2021-04-30
申请人： FDK CORPORATION
发明人： Katsuhiko Tamaki
CPC分类号： H02J9/061 , H01M10/30 , H01M10/46 , H02J7/0013 , H02J7/007182
摘要： A backup power supply device having a short charging time is provided. The backup power supply device for supplying power when a main power supply is under a power failure includes first and second battery packs connected in parallel, a charging circuit for charging the first and second battery packs, first and second discharging switches for causing the first and second battery packs to discharge to the load device respectively, and a control unit. The control unit compares the battery voltages of the first and second battery packs with an output voltage from the main power supply. The control unit sets the first and second discharging switches to ON when the battery voltages are lower than the output voltage. When the battery voltage of the battery pack exceeds the output voltage of the main power supply due to charging, the control unit sets the first discharging switch and the second discharging switch to OFF. Thereafter, after the first and second battery packs are fully charged, the control unit switches the first and second discharging switches to ON when the battery voltage has dropped to a dischargeable upper limit voltage.
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公开(公告)号：US20230238824A1
公开(公告)日：2023-07-27
申请号：US17999636
申请日：2021-04-30
申请人： FDK CORPORATION
发明人： Katsuhiko Tamaki
CPC分类号： H02J9/061 , H01M10/30 , H01M10/46 , H02J7/0013 , H02J7/007182
摘要： A backup power supply device having a short charging time is provided. The backup power supply device for supplying power when a main power supply is under a power failure includes first and second battery packs connected in parallel, a charging circuit for charging the first and second battery packs, first and second discharging switches for causing the first and second battery packs to discharge to the load device respectively, and a control unit. The control unit compares the battery voltages of the first and second battery packs with an output voltage from the main power supply. The control unit sets the first and second discharging switches to ON when the battery voltages are lower than the output voltage. When the battery voltage of the battery pack exceeds the output voltage of the main power supply due to charging, the control unit sets the first discharging switch and the second discharging switch to OFF. Thereafter, after the first and second battery packs are fully charged, the control unit switches the first and second discharging switches to ON when the battery voltage has dropped to a dischargeable upper limit voltage.
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