公开(公告)号：US12153096B2

公开(公告)日：2024-11-26

申请号：US16978549

申请日：2018-12-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomokazu Sada ,  Masatoshi Nagayama ,  Yukikazu Ohchi ,  Kazuya Hayayama

IPC: G01R31/389 ,  G01R31/36 ,  G01R31/367 ,  G01R31/392 ,  G01R31/396 ,  H01M10/48 ,  H02J7/00

Abstract: A deterioration diagnosis unit 21a of an arithmetic unit 20 constituting a remaining performance evaluation system 3 diagnoses the deterioration degree of a secondary battery 5 that has already been used for primary use based on an actual measurement value. The deterioration speed update unit 21b updates the deterioration speed of the secondary battery 5 based on the diagnosis result of the secondary battery 5. The remaining performance estimation unit 21c estimates the remaining performance of the secondary battery 5 after the start of secondary use based on the updated deterioration speed and a usage method at the time of the secondary use of the secondary battery 5.

公开(公告)号：US11502530B2

公开(公告)日：2022-11-15

申请号：US16957054

申请日：2018-10-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuya Hayayama ,  Tomokazu Sada ,  Yukikazu Ohchi ,  Masatoshi Nagayama

IPC: H02J7/00 ,  G01R31/36 ,  B60L58/16 ,  B60L58/12 ,  H01M10/48

Abstract: A state estimator estimates, based on at least one of a voltage, a current, and a temperature of a secondary battery, a state of the secondary battery including a state of charge (SOC) of the secondary battery. A discharge controller discharges, when a state of non-use of the secondary battery lasts for a predetermined period of time, the secondary battery such that an indicator indicating easiness of storage deterioration of the secondary battery to progress decreases in stages. The indicator includes a parameter that depends on an SOC of the secondary battery. A value of the indicator and a duration of stay in each stage are set such that a predetermined relationship holds between products in a plurality of stages, each of the products being derived from multiplying the value of the indicator and the duration of stay in each stage.

公开(公告)号：US11448707B2

公开(公告)日：2022-09-20

申请号：US16639458

申请日：2018-07-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomokazu Sada ,  Yukikazu Ohchi ,  Kazuya Hayayama

IPC: G01R31/389 ,  G01R31/36 ,  B60L58/12 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00

Abstract: According to the present invention, a state management unit measures or estimates the AC resistance value of a secondary cell at a plurality of time points, estimates a predicted transition of the AC resistance value of the secondary cell on the basis of the AC resistance value at the plurality of time points, and estimates a remaining use period until the AC resistance value of the secondary cell reaches a resistance threshold value corresponding to a time point at which usage of the secondary cell ends. When the remaining use period of the secondary cell becomes shorter than a prescribed period, an operation management unit changes the usage manner of the secondary cell method to a usage manner that has a smaller load on the secondary cell, or stops the usage of the secondary cell.