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08/14/08 - USPTO Class 320 |  71 views | #20080191667 | Prev - Next | About this Page  320 rss/xml feed  monitor keywords

Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage

USPTO Application #: 20080191667
Title: Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage
Abstract: In one embodiment the battery voltage is monitored to determine a possible battery failure, for example in the case of the battery voltage decreasing during the constant current charging of phase two. In some embodiments the battery is shorted out in response to detection of a possible failure. A method for charging a battery is disclosed, wherein a constant current charging current is periodically adjusted as needed such that the change in battery voltage increases approximately linearly during the charging period. In some embodiments the charging is in three phases. An optional first phase charges with a low current until the battery voltages rises to a certain minimum. During a second phase a constant current is provided while the battery voltage is monitored. The second phase constant current is periodically increased if the rate of change of battery voltage is less than a predetermined value and is decreased if the rate of change of battery voltage is more than the predetermined value. When the battery voltage attains a predetermined value, a third phase begins wherein a constant voltage is applied to the battery while the battery current draw is periodically monitored. Charging is stopped when the battery current draw falls to a predetermined value or, in some embodiments, when the charging current drops to a value that is a certain percentage of the charging current at the termination of phase two. (end of abstract)



USPTO Applicaton #: 20080191667 - Class: 320150 (USPTO)

Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage description/claims


The Patent Description & Claims data below is from USPTO Patent Application 20080191667, Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage.

Brief Patent Description - Full Patent Description - Patent Application Claims
  monitor keywords COMPUTER PROGRAM LISTING APPENDIX

The computer program listing appendix attached hereto consists of two (2) identical compact disks, copy 1 and copy 2, each containing a listing of the software code for one embodiment of the components of this invention. Each compact disk contains the following files (date and time of creation, size in bytes, path and file name, size in bytes, and date and time of creation):

Path/FileName Size (bytes) Creation Date

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Brief Patent Description - Full Patent Description - Patent Application Claims

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Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage
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Method and apparatus for moving material
Industry Class:
Electricity: battery or capacitor charging or discharging

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