公开(公告)号：US11884180B2

公开(公告)日：2024-01-30

申请号：US17183558

申请日：2021-02-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  PRIMEARTH EV ENERGY CO., LTD.

Inventor： Takayuki Irie ,  Jun Satoh ,  Junichi Matsumoto ,  Daisuke Koba ,  Yosuke Murota ,  Kazuki Nakano ,  Suguru Muraki

IPC: B60L53/62 ,  B60L58/13 ,  H01M10/34 ,  H01M10/44

CPC classification number: B60L58/13 ,  B60L53/62 ,  H01M10/345 ,  H01M10/443 ,  H01M2220/20

Abstract: A battery system includes a nickel-metal hydride battery and an ECU that controls charging and discharging of the nickel-metal hydride battery. The ECU calculates a discharge electricity amount showing an integrated value of a current discharged from the nickel-metal hydride battery, and further calculates ΔSOC of the nickel-metal hydride battery in a prescribed time period. The ECU calculates a charge reserve capacity of the nickel-metal hydride battery based on a temperature of the nickel-metal hydride battery, the discharge electricity amount, and the ΔSOC.

公开(公告)号：US10976372B2

公开(公告)日：2021-04-13

申请号：US16231176

申请日：2018-12-21

Applicant: PRIMEARTH EV ENERGY CO., LTD.

Inventor： Daisuke Koba ,  Yosuke Murota ,  Shinobu Minatani ,  Hiroki Nakafuji ,  Daisuke Shinohara ,  Tetsuya Osaka

IPC: G01R31/396 ,  G01R31/389 ,  G01R31/374 ,  G01R31/36 ,  G01R31/367

Abstract: A battery state estimation device for estimating a charged electric charge quantity of a rechargeable battery includes an impedance measurement unit configured to measure a plurality of complex impedances of the rechargeable battery by supplying measurement power to the rechargeable battery, a parameter calculation unit configured to calculate a parameter that includes a ratio of a difference between measurement angular velocities of two complex impedances in a diffusion region among the measured complex impedances to a difference between components of the two complex impedances, and an electric charge quantity estimation unit configured to estimate a charged electric charge quantity of the rechargeable battery based on the calculated parameter and preset correlated information between the charged electric charge quantity of the rechargeable battery and the parameter.