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:
Aug. 22, 1995
Filed:
Jul. 23, 1992
Wesley A Rogers, Grosse Pointe Park, MI (US);
Electronic Development Inc., Grosse Pointe Park, MI (US);
Abstract
An apparatus and method for monitoring the state of charge of the battery having a shunt resistor connected in series with a battery and an integrating circuit connected across the terminals of the shunt resistor which includes a large capacitance element having the capability to store charge for long periods of time, so that the integration can be performed along the same curve even if power to the integrating circuit is interrupted during continuous or intermittent use. The apparatus and method are applicable to batteries for automotive vehicles. Temperature compensation schemes to adjust the state of charge monitoring circuit to correct for changes in battery performance characteristics with temperature are provided. A circuit for detecting the existence of a defective battery cell is provided. A system for monitoring charging and discharging of the battery over time and identifying various battery conditions and potential battery or battery charging system failures is provided.