公开(公告)号：US20250167574A1

公开(公告)日：2025-05-22

申请号：US18836101

申请日：2022-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takashi HIGASHIDE ,  Katsunori ATAGO ,  Youichi KAGEYAMA ,  Mitsuhiro MATSUO ,  Yugo SETSU ,  Hiroki NISHINAKA ,  Shinichi TANIDA ,  Kazuo TAKENAKA

IPC: H02J7/00

Abstract: A charging and discharging device includes: step-up/step-down converter including reference terminals, a first and second input/output terminals; and a power storage element connected between one of the reference terminals and the second input/output terminal, wherein the step-up/step-down converter is a polarity inversion type bidirectional DC-DC converter which charges the power storage element by inverting a polarity of a first DC voltage input from the first input/output terminal using a potential of the reference terminal as a reference potential and stepping up/down the first DC voltage to output a second DC voltage from the second input/output terminal, and discharges the power storage element by inverting a polarity of a third DC voltage input from the second input/output terminal using a potential of the reference terminal as a reference potential and stepping up/down the third DC voltage to output a fourth DC voltage from the first input and input/output terminal.

公开(公告)号：US20220123585A1

公开(公告)日：2022-04-21

申请号：US17431022

申请日：2019-12-24

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. ,  HONDA MOTOR CO., LTD.

Inventor： Youichi KAGEYAMA ,  Hiroki KATO

IPC: H02J9/06 ,  H02J7/34

Abstract: A backup power supply system for a shift-by-wire system includes a power storage unit and a control unit. Power storage unit supplies power to a shift-by-wire system. When at least one of a first condition or a second condition is satisfied, control unit outputs an instruction signal, instructing that a shift range of an automatic transmission should be changed into a parking range, to shift-by-wire system. First condition requires that the duration for which output voltage of the mains power supply remains equal to or less than a first voltage threshold value should be longer than a first duration. Second condition requires that the duration for which the output voltage of the mains power supply remains equal to or less than a second voltage threshold value, smaller than the first voltage threshold value, should be longer than a second duration which is shorter than the first duration.