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.