公开(公告)号：US20170214266A1

公开(公告)日：2017-07-27

申请号：US15515066

申请日：2015-09-18

Applicant: NEC Corporation

Inventor： Shingo TAKAHASHI ,  Junichi MIYAMOTO ,  Yuichi IMAMURA ,  Sho OHTANI

IPC: H02J7/00 ,  G01R31/36

CPC classification number: H02J7/0068 ,  G01R31/392 ,  H02J7/0019 ,  H02J7/0021 ,  H02J7/0047 ,  H02J7/007 ,  H02J2007/005

Abstract: A control device for measuring the capacity of a lithium ion secondary battery without inconveniencing the user of the secondary battery, wherein the control device controls operations for a plurality of charge and discharge cycles comprising charging of the secondary battery and discharging of the secondary battery following thereafter. The control device acquires a first voltage which indicates the maximum voltage value in a first charge/discharge cycle, a discharge end voltage which indicates a voltage in the period between the end of discharge in the first charge/discharge cycle and the start of the next charge, and a reference voltage which indicates a voltage at which capacity measurement of the secondary battery is started. When the discharge end voltage is higher than the reference voltage, a second voltage which indicates the maximum voltage value in a second charge/discharge cycle, which is the next cycle after the first charge/discharge cycle, is set lower than the first voltage.

公开(公告)号：US20170261561A1

公开(公告)日：2017-09-14

申请号：US15509647

申请日：2015-09-08

Applicant: NEC Corporation

Inventor： Yuichi IMAMURA ,  Junichi MIYAMOTO ,  Shingo TAKAHASHI ,  Sho OHTANI

IPC: G01R31/36 ,  H01M10/48 ,  H02J7/00

CPC classification number: G01R31/3842 ,  G01R31/367 ,  H01M10/48 ,  H01M10/486 ,  H02J7/0052 ,  H02J2007/005

Abstract: Through the present invention, a residual capacity is measured with good precision even when a system for calculating the residual capacity of a storage cell on the basis of voltage and a system for calculating the residual capacity of a storage cell according to current integration are combined. In the present invention, as a first differential residual capacity, a difference value is calculated between a first residual capacity indicating the residual capacity of a storage cell at a first time, calculated by a voltage estimation system from the voltage and current of the storage cell at the first time, and the residual capacity of the storage cell at a second time, calculated by a voltage estimation system from the voltage and current from the storage cell at the second time. A second differential residual capacity is then calculated indicating the difference value between the residual capacity of the storage cell at the first time and the residual capacity of the storage cell at the second time, by a current integration system, on the basis of the integrated amount of current in the period between the first time and the second time. A current increase/decrease range indicating the increase/decrease of the current from the current at the first time and the current at the second time is then calculated, the first differential residual capacity or the second differential residual capacity is switched as the differential residual capacity on the basis of the current increase/decrease range, and the sum of the first residual capacity and the switched differential residual capacity is outputted as the residual capacity of the storage cell at the second time.

公开(公告)号：US20210083955A1

公开(公告)日：2021-03-18

申请号：US16965928

申请日：2019-03-13

Applicant: NEC Corporation

Inventor： Naoki KANAYA ,  Yuichi IMAMURA

IPC: H04L12/26 ,  H04W76/10 ,  H04W24/08

Abstract: The present invention provides a state monitoring device which make it possible to certainly deliver, to the maintenance staff side, state monitoring information of an apparatus to be monitored which is disposed in a distant place with a bad communication environment. A state monitoring device 300 is provided with a communication unit 301 which performs communication using a first communication line for transmitting operating information of an apparatus to be monitored to a server device, and a second communication line for transmitting the operating information to the server device via wireless communication provided by a mobile object if the first communication line is not communicable.

公开(公告)号：US20170254857A1

公开(公告)日：2017-09-07

申请号：US15507912

申请日：2015-09-07

Applicant: NEC Corporation

Inventor： Junichi MIYAMOTO ,  Yuichi IMAMURA ,  Shingo TAKAHASHI ,  Sho OHTANI ,  Hiroshi KAJITANI

IPC: G01R31/36

CPC classification number: G01R31/388 ,  G01R31/3842

Abstract: A control device of the present invention includes: an OCV estimating unit that estimates, based on a voltage value and a current value of a controlled device, an OCV of the controlled device; a capacity calculating unit that calculates an integrated capacity of the controlled device based on the current value of the controlled device; and a control unit that controls discharging and charging of the controlled device, and calculates a full capacity of the controlled device based on: a first SOC and a second SOC at a predetermined first OCV and a predetermined second OCV during the discharging or the charging of the controlled device; a first integrated capacity and a second integrated capacity at the first OCV and the second OCV during the discharging; and a third integrated capacity and a fourth integrated capacity at the second OCV and the first OCV during the charging.

公开(公告)号：US20170254853A1

公开(公告)日：2017-09-07

申请号：US15505417

申请日：2015-09-02

Applicant: NEC Corporation

Inventor： Yuichi IMAMURA ,  Junichi MIYAMOTO ,  Shingo TAKAHASHI ,  Sho OHTANI

IPC: G01R31/36 ,  H02J3/32 ,  H02J7/00 ,  H01M10/44 ,  H01M10/48

Abstract: An information processing device according to the present invention includes: a reception unit which receives a state of an electricity storage unit which stores electric power; a charge and discharge control unit which controls charging in a charging period that includes a first period in which charging is performed from a second lower-limit voltage to a first lower-limit voltage and a second period in which charging is performed from the first lower-limit voltage to a first upper-limit voltage; and a capacity computation unit which calculates a capacity of the electricity storage unit, based on the state in the second period.