Patents by Inventor Norihito Enomoto

Norihito Enomoto 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).

  • Method and apparatus for measuring pure resistance of in-vehicle battery
    Patent number: 6518735
    Abstract: In an apparatus for measuring a pure resistance of an in-vehicle battery, a terminal voltage and a discharging current of the battery are measured when the discharging current flows from the battery. A first approximate equation of a voltage-current characteristic curve is acquired for an increasing discharging current, and a second approximate equation is the voltage-current characteristic curve is acquired for a decreasing discharging current. Two points providing equal synthesized resistances each composed of the pure resistance and polarization resistance component are set on the voltage-current characteristic curves represented by the first and the second approximate equations, respectively. The gradients between the two points in each of the voltage-current characteristic curves are corrected to provide two corrected gradients each exclusive of a voltage drop due to the polarization resistance component.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: February 11, 2003
    Assignee: Yazaki Corporation
    Inventors: Tomohiro Kawaguchi, Norihito Enomoto, Hideaki Kamohara, Youichi Arai
  • Method and apparatus for measuring pure resistance of in-vehicle battery
    Publication number: 20020053910
    Abstract: In an apparatus for measuring a pure resistance of an in-vehicle battery, a terminal voltage and a discharging current of the battery are measured when the discharging current flows from the battery. A first approximate equation of a voltage-current characteristic curve is acquired for an increasing discharging current, and a second approximate equation is the voltage-current characteristic curve is acquired for a decreasing discharging current. Two points providing equal synthesized resistances each composed of the pure resistance and polarization resistance component are set on the voltage-current characteristic curves represented by the first and the second approximate equations, respectively. The gradients between the two points in each of the voltage-current characteristic curves are corrected to provide two corrected gradients each exclusive of a voltage drop due to the polarization resistance component.
    Type: Application
    Filed: November 5, 2001
    Publication date: May 9, 2002
    Applicant: Yazaki Corporation
    Inventors: Tomohiro Kawaguchi, Norihito Enomoto, Hideaki Kamohara, Youichi Arai