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:
Apr. 05, 2005
Filed:
Dec. 31, 1999
Josep Samittier Marti, Barcelona, ES;
Manuel Puig Vidal, Igualada, ES;
Oscar Ruiz Sanchez, Barcelona, ES;
Daniel Guasch Murillo, Valls, ES;
Jordi Bigorra Vives, Valls, ES;
Jordi Giro Roca, Valls, ES;
Josep Samittier Marti, Barcelona, ES;
Manuel Puig Vidal, Igualada, ES;
Oscar Ruiz Sanchez, Barcelona, ES;
Daniel Guasch Murillo, Valls, ES;
Jordi Bigorra Vives, Valls, ES;
Jordi Giro Roca, Valls, ES;
Lear Automotive (EEDS) Spain, S.L., Tarragona, ES;
Abstract
Based on the measurement of the increase of sinusoidal voltage ΔV=Vsine(2πft) on adding a sinusoidal current ΔI=Isine(2πft+φ) to the battery current, where f is the frequency and I, the amplitude of the superimposed current, with whose magnitudes the electrochemical impedance of the battery Z(f)=V/Ieis calculated, comprising the application of a first sinusoidal signal of prefixed frequency to the battery which generates an alternate voltage component superimposed over the direct one; eliminating the direct component of the response signal; applying a second periodic voltage signal with a frequency identical to that of said first signal and carrying out a synchronous detection of the alternate component generated by the application of said first signal to obtain the voltage proportional to the electrochemical impedance and evaluate the state of health and charge of the battery.