Patents Assigned to Maxwell Electronics, Inc.
  • Electrochemical double layer capacitor having carbon powder electrodes
    Patent number: 6804108
    Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: October 12, 2004
    Assignee: Maxwell Electronics, Inc.
    Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi
  • Electrochemical double layer capacitor having carbon powder electrodes
    Publication number: 20040085709
    Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.
    Type: Application
    Filed: July 28, 2003
    Publication date: May 6, 2004
    Applicant: Maxwell Electronics, Inc.
    Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi