Patents by Inventor Akemi NAKATAKE

Akemi NAKATAKE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and method of estimating state of lithium ion battery
    Patent number: 11067637
    Abstract: A control device calculates an amount of increase ?Am in freezing temperature measurement value Am from an initial freezing temperature ?0 and calculates an amount of lowering in capacity corresponding to the amount of increase ?Am in freezing temperature as an amount of lowering in capacity ?Bx due to deterioration of a material. The control device calculates an amount of lowering in capacity measurement value Bm from an initial capacity B0 as a whole amount of lowering in capacity ?Bm and calculates a material deterioration ratio X by using ?Bx and ?Bm. The control device calculates a value resulting from subtraction of ?Bx from ?Bm as an amount of lowering in capacity ?By due to precipitation of Li and calculates an Li precipitation deterioration ratio Y by using ?By and ?Bm.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: July 20, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryo Kanada, Koji Umemura, Akemi Nakatake
  • APPARATUS AND METHOD OF ESTIMATING STATE OF LITHIUM ION BATTERY
    Publication number: 20180340984
    Abstract: A control device calculates an amount of increase ?Am in freezing temperature measurement value Am from an initial freezing temperature ?0 and calculates an amount of lowering in capacity corresponding to the amount of increase ?Am in freezing temperature as an amount of lowering in capacity ?Bx due to deterioration of a material. The control device calculates an amount of lowering in capacity measurement value Bm from an initial capacity B0 as a whole amount of lowering in capacity ?Bm and calculates a material deterioration ratio X by using ?Bx and ?Bm. The control device calculates a value resulting from subtraction of ?Bx from ?Bm as an amount of lowering in capacity ?By due to precipitation of Li and calculates an Li precipitation deterioration ratio Y by using ?By and ?Bm.
    Type: Application
    Filed: April 20, 2018
    Publication date: November 29, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryo KANADA, Koji UMEMURA, Akemi NAKATAKE