Patents Represented by Attorney Scott M. Carrett

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  • Method of rapidly charging a lithium ion cell
    Patent number: 5481174
    Abstract: A battery charger for lithium ion cells closely monitors cell voltage, and charge time, so as to avoid the over-application of charge to the cell. Charge pulses (104) are followed by a first rest (110), a discharge (112) and a second rest, (120) period prior to re-initiating the charge pulse. If the battery voltage reaches a preselected maximum, in less than a pre-selected period of time, the charge pulse is reduced by a preselected minimum factor. Cycling of the cell is continued until the cells are fully charged.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: January 2, 1996
    Assignee: Motorola, Inc.
    Inventors: Lara J. Martin, Scott M. Garrett