公开(公告)号：US20220352746A1

公开(公告)日：2022-11-03

申请号：US17656862

申请日：2022-03-28

Applicant: FDK CORPORATION

Inventor： Yosuke Saito ,  Kazuhiro Hiwatashi

IPC: H02J9/06 ,  H02J7/00

Abstract: A backup power supply device is provided with: first to fifth battery packs connected in parallel; a charger that supplies a charge current to each battery pack; first to fifth charge switches that individually connect and disconnect charge paths of the respective battery packs; and a controller that controls each charge switch. The controller divides the battery packs into a plurality of groups and performs pulse-width modulation (PWM) control of each charge switch at a duty ratio corresponding to the number of batteries in each group to charge the battery packs for each group.

公开(公告)号：US11777333B2

公开(公告)日：2023-10-03

申请号：US17274371

申请日：2019-08-30

Applicant: FDK CORPORATION

Inventor： Yosuke Saito ,  Kiyotaka Kumamoto

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/46 ,  H01M10/48

CPC classification number: H02J7/00712 ,  H01M10/44 ,  H01M10/46 ,  H01M10/48 ,  H02J7/0048 ,  H02J2207/20

Abstract: A voltage adjuster has: a current path connecting one end on an input/output terminal side and the other end on a secondary battery side; a bypass path of the current path; a converter provided in the bypass path and capable of changing input electric power to a predetermined voltage corresponding to the secondary battery or a predetermined voltage corresponding to an external device in accordance with the charge or discharge of the second battery; and a path selector configured to select a path to be used out of the current path or the bypass path in accordance with the charge or discharge of the secondary battery.

公开(公告)号：US20180062217A1

公开(公告)日：2018-03-01

申请号：US15556613

申请日：2016-01-05

Applicant: FDK CORPORATION

Inventor： Kiyotaka Kumamoto ,  Yosuke Saito ,  Kenji Hanakawa ,  Mitshuiko Yamasaki ,  Yusuke Ogawa

IPC: H01M10/44 ,  H01M10/613 ,  H02J7/02

CPC classification number: H01M10/44 ,  H01M10/441 ,  H01M10/613 ,  H01M10/617 ,  H02J7/0024 ,  H02J7/0063 ,  H02J7/02 ,  H02J7/04 ,  H02J2007/0067

Abstract: A power storage system includes a plurality of power storage sections parallelly disposed, a plurality of charge/discharge circuits that individually charge/discharge the plurality of power storage sections, and a system control section that controls the plurality of charge/discharge circuits, and the system control section controls the charge/discharge circuits such that power storage sections adjacent to one another in vertical, horizontal and front-rear directions are not simultaneously charged or discharged.