公开(公告)号：US10295609B2

公开(公告)日：2019-05-21

申请号：US14905137

申请日：2014-06-18

Applicant: GS Yuasa International Ltd.

Inventor： Yuichi Ikeda ,  Yohei Tao ,  Shigeki Yamate

IPC: G01R31/36 ,  H01M10/42 ,  H01M10/48 ,  G01R31/392 ,  G01R31/389 ,  H02J7/00 ,  G01R31/44 ,  H02J7/04

Abstract: A deterioration state detection apparatus for detecting a deterioration state of capacity enabling charge or discharge of a nonaqueous electrolyte secondary battery includes: an acquisition unit that acquires a capacitance of the nonaqueous electrolyte secondary battery: and a determination unit that determines the deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery, from change of the acquired capacitance.

公开(公告)号：US11079440B2

公开(公告)日：2021-08-03

申请号：US16618475

申请日：2018-05-29

Applicant: GS Yuasa International Ltd.

Inventor： Yuichi Ikeda ,  Nan Ukumori

IPC: H02J7/00 ,  G01R31/3842 ,  H01M10/42 ,  H01M10/48

Abstract: A management device is provided with an acquiring unit for acquiring the amount of variation between the voltage of a power storage element when conduction of power is suspended from a state in which power is being conducted to the power storage element and the voltage when a period has elapsed, and a determination unit for determining whether the amount of variation is included in a second range that corresponds to a first range in which the voltage difference between each power storage amount-voltage characteristic during charging and discharging for the same power storage amount is less than another range.

公开(公告)号：US11181584B2

公开(公告)日：2021-11-23

申请号：US16498280

申请日：2018-03-28

Applicant: GS Yuasa International Ltd.

Inventor： Nan Ukumori ,  Yuichi Ikeda

IPC: G01R31/382 ,  H01M10/48 ,  G01R31/3842

Abstract: A storage amount estimation device estimates the storage amount of the energy storage device in which at least one of a positive electrode and a negative electrode contains an active material, at least two electrochemical reactions being generated in the active material depending on a transition of charge-discharge, the hysteresis between a storage amount-voltage value charge characteristic and a storage amount-voltage value discharge characteristic during generation of one of the electrochemical reactions being smaller than the hysteresis during generation of the other electrochemical reaction in the active material. The storage amount estimation device includes an estimator that estimates the storage amount using a voltage reference storage amount-voltage value characteristic obtained based on the storage amount-voltage value discharge characteristic when the one electrochemical reaction is generated more than the other electrochemical reaction.

公开(公告)号：US11150303B2

公开(公告)日：2021-10-19

申请号：US16618621

申请日：2018-05-31

Applicant: GS Yuasa International Ltd.

Inventor： Nan Ukumori ,  Yuichi Ikeda

IPC: G01R31/371 ,  G01R31/382 ,  H02J7/00

Abstract: A power storage element is provided that includes, in a positive electrode or a negative electrode, an active material which causes a plurality of electrochemical reactions in accordance with the process of change during charging and discharging and which exhibits hysteresis between a power storage amount-voltage charging (first) property and a power storage amount-voltage discharging (second) property. A BMU is provided with a first estimation unit which estimates a power storage amount-voltage charging property or/and a power storage amount-voltage discharging property referenced when estimating the power storage amount, on the basis of an upward voltage and a downward voltage which are respectively more than and less than a first threshold value, acquired from the first property, the second property, and the charging-discharging history.

公开(公告)号：US10761143B2

公开(公告)日：2020-09-01

申请号：US16618561

申请日：2018-05-25

Applicant: GS Yuasa International Ltd.

Inventor： Nan Ukumori ,  Yuichi Ikeda

IPC: G01R31/396 ,  G01R31/3835 ,  H01M10/48 ,  H01M4/02

Abstract: A storage amount estimation device is provided that can estimate a storage amount of an energy storage device containing an active material in which a storage amount-voltage characteristic exhibits a hysteresis, an energy storage module including the storage amount estimation device, a storage amount estimation method, and a computer program. An energy storage device contains an active material exhibiting hysteresis between a storage amount-voltage charge characteristic and a storage amount-voltage discharge characteristic in a positive electrode and/or a negative electrode, the active material generating a plurality of electrochemical reactions according to transition of charge-discharge. A BMU includes an acquisition unit that acquires a storage amount-voltage charge characteristic for reference and/or a storage amount-voltage discharge characteristic for reference based on the first characteristic, the second characteristic, and voltage history of the charge-discharge and an estimation unit that estimates the storage amount based on the voltage history of the charge-discharge, the third characteristic and/or the fourth characteristic, and the acquired voltage.