Richard F Jakubowski

US Patent:

20150048801, Feb 19, 2015

Filed:

Nov 6, 2013

Appl. No.:

14/072824

Inventors:

- Libertyville IL, US
Richard Jakubowski - Buffalo Grove IL, US
Robert M. Johnson - Lake Zurich IL, US

Assignee:

MOTOROLA MOBILITY LLC - Libertyville IL

International Classification:

G01R 31/36
H02J 7/00

US Classification:

320149, 324426

Abstract:

An apparatus () includes at least one electrochemical cell () and at least one pass element () serially coupled with the electrochemical cell. A control circuit () is operable to open the at least one pass element when a charger () or power supply () is connected to the electrochemical cell for at least a predetermined time and to measure an open circuit voltage of the at electrochemical cell to determine a state of charge. The control circuit can then close the pass element to charge the electrochemical cell, determine an amount of the charge, and store an estimated energy capacity of the electrochemical cell based upon the open circuit voltage and the amount.