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：US20200056797A1

公开(公告)日：2020-02-20

申请号：US16499395

申请日：2017-03-30

Applicant: NEC Corporation

Inventor： Masanori TSUJIKAWA ,  Yoshifumi ONISHI ,  So YAMADA ,  Toshinobu OGATSU ,  Yukihiro KIUCHI ,  Sho OHTANI

IPC: F24F11/30 ,  F24F11/64 ,  F24F11/65 ,  F24F11/80 ,  G05B19/042

Abstract: Provided an area-specific environment management system, which manages an environment in an individual one of a plurality of areas, the system including: a biological information sensor that acquires biological information about at least one of an individual and a group who belongs to an individual one of the areas; an environmental information sensor that acquires environmental information about an individual one of the areas; an arousal level estimation section that estimates an arousal level with respect to the biological information by using an arousal level estimation model; and an environment provision section that provides an environment to an individual one of the areas based on the arousal level and the environmental information, wherein the arousal level includes, as a state to which the arousal level belongs, a state from sleepy until awakened; a wakeful state; and an excessively wakeful state, and wherein the environment provision section includes an individual control mode corresponding to a state to which the arousal level belongs and manages an environment to be provided to an individual one of the areas based on the control mode.

公开(公告)号：US20180128880A1

公开(公告)日：2018-05-10

申请号：US15574518

申请日：2016-05-19

Applicant: NEC Corporation

Inventor： Junichi MIYAMOTO ,  Hiroshi KAJITANI ,  Sho OHTANI

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

CPC classification number: G01R31/3842 ,  G01R31/36 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00 ,  H02J7/0047 ,  H02J7/007 ,  H02J7/0073 ,  H02J2007/005

Abstract: A storage battery control device includes: a voltage measurement means for measuring terminal voltage of a storage battery; a current measurement means for measuring charge current and discharge current of the storage battery; a capacity calculation means for calculating a cumulative capacity of the storage battery by using the charge current measured by a current measurement unit; a control means for determining an operation of the storage battery, based on at least one of the terminal voltage, the charge current, the discharge current, and the cumulative capacity; and a charging/discharging control means for causing the storage battery to operate in accordance with an instruction from the control means, and the charging/discharging control means causes the storage battery to charge by a first charging method from a discharge end voltage to a first charge voltage, to charge by a second charging method at the first charge voltage, to charge by the first charging method from the first charge voltage to a second charge voltage, and to charge by the second charging method at the second charge 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：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.