公开(公告)号：US20170285110A1

公开(公告)日：2017-10-05

申请号：US15469438

申请日：2017-03-24

Applicant: GS Yuasa International Ltd.

Inventor： Tomoshige INOUE ,  Kenichi SEJIMA

IPC: G01R31/36

Abstract: Provided is an estimation device for estimating an actual capacity of an energy storage device or a total reduction amount of the actual capacity. The estimation device includes a processor which is configured to calculate the actual capacity of the energy storage device or the total reduction amount of the actual capacity based on approximation data where a capacity change curve indicative of a transition of the actual capacity or a transition of the total reduction amount of the actual capacity with respect to an elapsed time is approximated by a plurality of straight lines.

公开(公告)号：US20160259012A1

公开(公告)日：2016-09-08

申请号：US15056915

申请日：2016-02-29

Applicant: GS Yuasa International Ltd.

Inventor： Kenichi SEJIMA ,  Takeyuki SHIRAISHI ,  Yoshihiko MIZUTA

IPC: G01R31/36

CPC classification number: G01R31/3651 ,  G01R31/3624

Abstract: An energy storage device management method for deciding an SOC estimated value includes: preparing first and second SOC estimation methods for estimating an SOC; and employing a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different. V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions. The first SOC region is the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region is the SOC region that the SOC estimated by the second SOC estimation method belongs to. The predetermined value is set to a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or a value between the boundary value and an intermediate value of the second SOC region.

Abstract translation: 用于确定SOC估计值的能量存储装置管理方法包括：准备用于估计SOC的第一和第二SOC估计方法; 并且当第一SOC区域和第二SOC区域不同时，采用预定值作为所述SOC估计值。 能量存储装置的电压和充电状态之间的V-SOC相关性被划分为多个SOC区域。 第一SOC区域是由第一SOC估计方法估计的SOC所属的SOC区域，第二SOC区域是由第二SOC估计方法估计的SOC属于的SOC区域。 预定值被设定为接近于分割第二SOC区域的边界值的第一SOC区域的边界附近的边界值的值或第二SOC区域的边界值与中间值之间的值。

公开(公告)号：US20190025377A1

公开(公告)日：2019-01-24

申请号：US16069442

申请日：2017-01-13

Applicant: GS Yuasa International Ltd.

Inventor： Kenichi SEJIMA

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

Abstract: The present invention is to improve the estimation accuracy of an SOC of a storage element. A storage element management device disclosed in the present description is a battery management device 50 that determines an SOC range indicating a state-of-charge of a secondary battery 30, and has a constitution including a central processing unit 61 that sets an overlapping range between an SOC range (i) R1, determined by a current integration method, and an SOC range (v) R2, determined by a voltage reference method in a stage where the SOC range (i) R1 is determined by the current integration method, as a new SOC range R3.

公开(公告)号：US20170212171A1

公开(公告)日：2017-07-27

申请号：US15415647

申请日：2017-01-25

Applicant: GS Yuasa International Ltd.

Inventor： Kenichi SEJIMA

IPC: G01R31/36 ,  B60L11/18 ,  H02J7/00

CPC classification number: G01R31/3658 ,  B60L11/1866 ,  G01R31/3637 ,  G01R31/3648 ,  H02J7/0016 ,  H02J7/0021

Abstract: A state estimation device includes: a voltage detecting unit that detects voltages of energy storage devices; and an estimating unit that estimates a charge amount difference between at least two of the energy storage devices. At a reference time point T0 during constant current charging, the estimating unit performs: specific voltage setting for setting, as a specific voltage V0, a voltage of a low-voltage energy storage device at the reference time point T0; time obtaining for obtaining a time point at which a voltage of a high-voltage energy storage device reaches the specific voltage V0; and charge amount difference estimating for estimating the charge amount difference between the at least two energy storage devices based on the reference time point T0, the time point obtained in the time obtaining process, and a current flowing through the plurality of energy storage devices during the constant current charging.

公开(公告)号：US20170371000A1

公开(公告)日：2017-12-28

申请号：US15526982

申请日：2015-11-13

Applicant: GS Yuasa International Ltd.

Inventor： Atsushi FUKUSHIMA ,  Kenichi SEJIMA ,  Masashi NAKAMURA ,  Takeyuki SHIRAISHI

IPC: G01R31/36 ,  G01R19/165 ,  H02J7/00 ,  H01M10/42 ,  H01M10/48

Abstract: A management device manages a secondary battery which includes a positive electrode having an active material with a characteristic where a potential flat portion exists in a relationship between a capacity and a potential. The management device includes a management unit which detects an occurrence of temporary degradation of the secondary battery when an SOC correlation associated value which is associated with an SOC of the secondary battery is acquired and the SOC which corresponds to the acquired SOC correlation associated value is equal to or less than a preset prescribed SOC or when a state value relating to a voltage of the secondary battery is acquired and a magnitude relationship between the acquired state value relating to the voltage of the secondary battery and a preset threshold value satisfies a predetermined condition.

公开(公告)号：US20140084939A1

公开(公告)日：2014-03-27

申请号：US14024532

申请日：2013-09-11

Applicant: GS Yuasa International Ltd.

Inventor： Kenichi SEJIMA ,  Yoshihiko Mizuta ,  Masashi Nakamura ,  Hiroshi Sekiguchi ,  Hidefumi Hasegawa ,  Shinya Kitano

IPC: G01R31/36

CPC classification number: G01R31/3606 ,  G01R31/3634 ,  G01R31/3637 ,  G01R31/3651 ,  G01R31/3679

Abstract: A condition estimation device includes a voltage measurement circuit, memory, and a controller. The voltage measurement circuit measures an open circuit voltage (OCV) of an electric storage device. The memory is configured to store first information on a correlation between a positive electrode potential and an electric storage capacity and second information on a correlation between a negative electrode potential and an electric storage capacity. The controller is configured to: measure an OCV under charge or discharge; calculate an electric storage capacity of the electric storage device having the OCV equal to a reference voltage; correct at least one of the first information and the second information such that a potential difference at the calculated capacity is equal to the reference voltage; and generate an OCV characteristic based on the first and the second information after the at least one of the first and the second information is corrected.

Abstract translation: 条件估计装置包括电压测量电路，存储器和控制器。 电压测量电路测量蓄电装置的开路电压（OCV）。 存储器被配置为存储关于正极电位和蓄电容量之间的相关性的第一信息以及关于负极电位和蓄电容量之间的相关性的第二信息。 控制器配置为：在充电或放电下测量OCV; 计算具有等于参考电压的OCV的蓄电装置的蓄电容量; 校正所述第一信息和所述第二信息中的至少一个，使得所计算的容量的电位差等于所述参考电压; 并且在所述第一和第二信息中的至少一个被校正之后，基于所述第一和第二信息生成OCV特性。

公开(公告)号：US20160370431A1

公开(公告)日：2016-12-22

申请号：US15179718

申请日：2016-06-10

Applicant: GS Yuasa International Ltd.

Inventor： Kenichi SEJIMA ,  Takeyuki Shiraishi

IPC: G01R31/36

CPC classification number: G01R31/3842 ,  G01R31/3648 ,  G01R31/367 ,  G01R31/3828 ,  G01R31/387 ,  G01R31/392

Abstract: A state estimation device includes: a current integration unit configured to integrate a current that flows through the energy storage device; and a first estimation unit configured to estimate a full-charge capacity of the energy storage device. The energy storage device has a correlation characteristic of correlation between a residual capacity C and an open voltage V, the correlation characteristic including a constant region in which a time change in the correlation characteristic is relatively smaller than an other region. The first estimation unit performs: calculation of a residual capacity Cp of the energy storage device at a measuring point P based on an open voltage Vp of the energy storage device at the measuring point P included in the constant region, and on the correlation characteristic; and estimation of a full-charge capacity Co of the energy storage device based on the residual capacity Cp at the measuring point P that has been calculated, and on an accumulated charge-discharge amount X of the energy storage device from a full-charge state to the measuring point P, the full-charge state satisfying a full charge condition.

Abstract translation: 一种状态估计装置，包括：电流积分单元，被配置为对流过所述能量存储装置的电流进行积分; 以及第一估计单元，被配置为估计能量存储装置的满充电容量。 能量存储装置具有残留容量C和开路电压V之间的相关性的相关特性，相关特性包括相关特性的时间变化相对小于其他区域的恒定区域。 第一估计单元执行：基于在恒定区域中包括的测量点P处的能量存储装置的开路电压Vp和相关特性，计算测量点P处的能量存储装置的剩余容量Cp; 以及基于已经计算的测量点P处的剩余容量Cp以及来自满充电状态的能量存储装置的累积充放电量X来估计能量存储装置的全充电容量Co 到测量点P，满充电状态满足满充电条件。

公开(公告)号：US20140303914A1

公开(公告)日：2014-10-09

申请号：US14242341

申请日：2014-04-01

Applicant: GS Yuasa International Ltd.

Inventor： Kenichi SEJIMA

IPC: G01R31/36

CPC classification number: G01R31/3682 ,  G01R31/361 ,  G01R31/3624 ,  G01R31/3651 ,  G01R31/3658

Abstract: The state of charge (SOC) estimation device includes a memory and a controller component. The memory stores data on a first correlation between an elapsed time and an estimation error in SOC estimation. The controller component executes a first estimation process and a second estimation process. The first estimation process is for estimating a first SOC and a first estimation error of the electric storage device in a non-charge/discharge state based on a terminal voltage and the elapsed time. The second estimation process is for estimating a second SOC and a second estimation error of the electric storage device in a charge/discharge state based on an accumulated charge/discharge current. The controller component calculates a total error from the first estimation error and the second estimation error. The controller component estimates the first estimation error when the elapsed time becomes equal to or longer than a reference time.

Abstract translation: 充电状态（SOC）估计装置包括存储器和控制器部件。 存储器存储关于SOC估计中的经过时间和估计误差之间的第一相关性的数据。 控制器部件执行第一估计处理和第二估计处理。 第一估计处理用于基于终端电压和经过时间来估计非充电/放电状态下的蓄电装置的第一SOC和第一估计误差。 第二估计处理用于基于累积的充电/放电电流来估计充电/放电状态下的蓄电装置的第二SOC和第二估计误差。 控制器部件根据第一估计误差和第二估计误差计算总误差。 当经过时间变得等于或长于参考时间时，控制器部件估计第一估计误差。