公开(公告)号：US20230251322A1

公开(公告)日：2023-08-10

申请号：US18132550

申请日：2023-04-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroki Nagai ,  Hiroki Tashiro ,  Yoshihiro Uchida ,  Mitsuhiro Kuzuba ,  Yuki Sugo

IPC: G01R31/392 ,  H01M10/44 ,  B60L58/12 ,  H01M10/48 ,  H01M10/0525 ,  B60L50/64

CPC classification number: G01R31/392 ,  H01M10/44 ,  B60L58/12 ,  H01M10/486 ,  H01M10/0525 ,  B60L50/64 ,  H01M2220/20

Abstract: ECU evaluates high-rate degradation of a lithium-ion battery, using a score and an in-plane score. The score is an index for evaluating unevenness in salt concentration of an electrode body in a lamination direction of the electrode body. The in-plane score is an index for evaluating unevenness in salt concentration of the electrode body in an in-plane direction of the electrode body. For each computing cycle, ECU calculates a current score, and calculates a current in-plane score based on an SOC (State Of Charge) of the lithium-ion battery. When the absolute value of an in-plane integrated score is beyond a reference value, ECU evaluates the high-rate degradation based on the current score, the current in-plane score, and a degradation score which is obtained by integrating previous scores beyond a deadband. When the absolute value is below the reference value, ECU evaluates the high-rate degradation, based on the degradation score.

公开(公告)号：US20230324467A1

公开(公告)日：2023-10-12

申请号：US18100687

申请日：2023-01-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kenta ONISHI ,  Mitsuhiro Kuzuba ,  Yoshihiro Uchida ,  Yuki Sugo

IPC: G01R31/3842 ,  G01R31/36

CPC classification number: G01R31/3842 ,  G01R31/3648

Abstract: A battery has an SOC-OCV characteristic having a flat region. When a stage change detecting unit detects an occurrence of stage change during traveling of an electrified vehicle, a discharge current integrating unit calculates a discharge current integrated amount. When external charging is started, a charge current integrating unit calculates a charge current integrated amount until the battery is fully charged. A full charge capacity calculating unit calculates a full charge capacity based on a storage amount at a time of the stage change, the discharge current integrated amount, and the charge current integrated amount.

公开(公告)号：US11656290B2

公开(公告)日：2023-05-23

申请号：US17158361

申请日：2021-01-26

Applicant: Toyota Jidosha Kabushiki Kaisha

Inventor： Hiroki Nagai ,  Hiroki Tashiro ,  Yoshihiro Uchida ,  Mitsuhiro Kuzuba ,  Yuki Sugo

IPC: G01R31/392 ,  B60L50/64 ,  B60L58/12 ,  H01M10/0525 ,  H01M10/44 ,  H01M10/48

CPC classification number: G01R31/392 ,  B60L50/64 ,  B60L58/12 ,  H01M10/0525 ,  H01M10/44 ,  H01M10/486 ,  H01M2220/20

Abstract: ECU evaluates high-rate degradation of a lithium-ion battery, using a score and an in-plane score. The score is an index for evaluating unevenness in salt concentration of an electrode body in a lamination direction of the electrode body. The in-plane score is an index for evaluating unevenness in salt concentration of the electrode body in an in-plane direction of the electrode body. For each computing cycle, ECU calculates a current score, and calculates a current in-plane score based on an SOC (State Of Charge) of the lithium-ion battery. When the absolute value of an in-plane integrated score is beyond a reference value, ECU evaluates the high-rate degradation based on the current score, the current in-plane score, and a degradation score which is obtained by integrating previous scores beyond a deadband. When the absolute value is below the reference value, ECU evaluates the high-rate degradation, based on the degradation score.

公开(公告)号：US20210231745A1

公开(公告)日：2021-07-29

申请号：US17158361

申请日：2021-01-26

Applicant: Toyota Jidosha Kabushiki Kaisha

Inventor： Hiroki Nagai ,  Hiroki Tashiro ,  Yoshihiro Uchida ,  Mitsuhiro Kuzuba ,  Yuki Sugo

IPC: G01R31/392 ,  B60L50/64 ,  B60L58/12 ,  H01M10/44 ,  H01M10/0525 ,  H01M10/48

Abstract: ECU evaluates high-rate degradation of a lithium-ion battery, using a score and an in-plane score. The score is an index for evaluating unevenness in salt concentration of an electrode body in a lamination direction of the electrode body. The in-plane score is an index for evaluating unevenness in salt concentration of the electrode body in an in-plane direction of the electrode body. For each computing cycle, ECU calculates a current score, and calculates a current in-plane score based on an SOC (State Of Charge) of the lithium-ion battery. When the absolute value of an in-plane integrated score is beyond a reference value, ECU evaluates the high-rate degradation based on the current score, the current in-plane score, and a degradation score which is obtained by integrating previous scores beyond a deadband. When the absolute value is below the reference value, ECU evaluates the high-rate degradation, based on the degradation score.