The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2013
Filed:
Sep. 20, 2007
Steven J. Fredette, South Windsor, CT (US);
Steven J. Fredette, South Windsor, CT (US);
UTC Power Corporation, South Windsor, CT (US);
Abstract
An arrangement for monitoring the current or state of charge (SOC) of an energy system () having one or more series-connected strings (S, S, . . . S) of battery cells (C, C, . . . C). The battery cells each have respective dissipative devices (D, D, . . . D) selectively connectable in parallel therewith for balancing cell voltages in the string. The dissipative devices are of predetermined, typically equal, impedance value. The voltage across each cell (V, V, . . . V) may be separately monitored, such that by dividing the monitored voltage across a cell by the impedance value of a dissipative device connected in parallel therewith, the dissipative current is determined. A summation of all of the dissipative currents yields an error value, which error value is then removed from the measured gross current (I) flowing through the combined battery cells and dissipative devices to yield a corrected value of current (I). A corrected SOC value (Q) is obtainable in a similar manner.