Patents by Inventor Kai Vuorilehto

Kai Vuorilehto 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).

  • Patent number: 9007029
    Abstract: The state of charge of a lithium-ion cell module including several cells is managed by observing changes in a cell's differential capacity curve exceeding or falling short of a preset limit value during a discharging or charging process of the cell. Each of the changes is a change which is specific for this particular cell and consistent with a specific state of charge of the cell, whereby the ordinal number of a differential capacity curve change is used as a basis for determining a state of charge of the cell consistent with the change or a difference in the states of charge between two or more cells. The thus determined state of charge differences between cells are then sought to be balanced by a balancing system adapted to balance a charge.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: April 14, 2015
    Assignee: European Batteries Oy Konkurssipesa
    Inventors: Kai Vuorilehto, Antti Vayrynen
  • Publication number: 20140145681
    Abstract: The state of charge of a lithium-ion cell module including several cells is managed by observing changes in a cell's differential capacity curve exceeding or falling short of a preset limit value during a discharging or charging process of the cell. Each of the changes is a change which is specific for this particular cell and consistent with a specific state of charge of the cell, whereby the ordinal number of a differential capacity curve change is used as a basis for determining a state of charge of the cell consistent with the change or a difference in the states of charge between two or more cells. The thus determined state of charge differences between cells are then sought to be balanced by a balancing system adapted to balance a charge.
    Type: Application
    Filed: July 9, 2012
    Publication date: May 29, 2014
    Inventors: Kai Vuorilehto, Antti Vayrynen