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:
Jun. 26, 2001
Filed:
Jan. 27, 2000
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The apparatus for detecting remaining charge of a battery, according to the present invention, comprises: current detector for detecting output electric current from and regenerative electric current to the battery; voltage detector for detecting a voltage output from the battery; low-pass filter for filtering the results of detection by the current detector and the voltage detector; time constant changer for changing the time constant of the low-pass filter; integrator for calculating the remaining charge in the battery by integrating the result of detection by the current detector; threshold voltage calculator for calculating a threshold voltage value corresponding to a specified value of the remaining charge, based on the electric current value filtered by the filter; comparator for comparing the threshold voltage value, calculated by the threshold voltage calculator, with the voltage value filtered by the filter; and resetter for resetting the remaining charge to the specified value when the filtered voltage value exceeds the threshold voltage value.