公开(公告)号：US09800066B2

公开(公告)日：2017-10-24

申请号：US14807549

申请日：2015-07-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoichi Toya ,  Takeshi Wada

IPC: H02J7/00 ,  H01M10/48 ,  H02J3/32 ,  G01R31/36 ,  H01M10/42

CPC classification number: H02J7/0026 ,  G01R31/3634 ,  G01R31/3679 ,  H01M10/48 ,  H01M2010/4278 ,  H02J3/32 ,  H02J7/0021 ,  H02J7/0024 ,  H02J7/0029

Abstract: An electricity distribution device is connected to a system power supply and a battery pack, and includes: a primary power converter circuit converting DC electric power discharged from the battery pack into electric power supplied to the load; a first switch switching conducting and non-conducting states between the primary power converter circuit and the load; and a control circuitry controlling the first switch to switch the conducting and non-conducting states between the primary power converter circuit and the load. The primary power convertor circuit consumes DC electric power discharged from the battery pack, in a state where the first switch switches the non-conducting state between the primary power convertor circuit and the load, and a current value is acquired when discharging from the fully-charged state to an empty state. The fully-charged capacity of the battery pack is measured using the acquired current value.