Vehicular battery charging method

A method for charging a battery pack for an electric vehicle charges at a preselected maximum charging current until the battery pack voltage reaches a reference voltage level. The battery pack is then charged while maintaining the reference voltage until the charging current decreases to a first re...

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Bibliographische Detailangaben
Hauptverfasser:	SWAN DAVID H, OSWALD LAWRENCE J, BOLGIANI GIOVANNI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY REGULATING
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Beschreibung
Zusammenfassung:	A method for charging a battery pack for an electric vehicle charges at a preselected maximum charging current until the battery pack voltage reaches a reference voltage level. The battery pack is then charged while maintaining the reference voltage until the charging current decreases to a first reference current level. Charging continues at the first reference current level until a time rate ofchange of the battery pack voltage reaches a first reference time rate of change. The battery pack voltage is determined and whenever the battery pack voltage is less than a decision voltage reference level, the battery pack is further charged at a second reference current level until the time rate of change of the battery pack voltage reaches a second reference value. A manually initiated pack recovery charge routine is also provided to address new battery pack installations.