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US 5,705,915 AGranted
Method for charging a battery
AssigneeMotorola, Inc.
InventorsTwanika D. Douglas, Joseph Patino, Michael D. Geren, William R. Williams
Life of this patent
Estimating the term…
Abstract
A method for charging a battery or battery pack (206) provides a scheme for terminating a rapid charging regime only after both a temperature and voltage threshold are exceeded. This allows a battery to continue to receive a rapid charge even when battery temperatures are rising rapidly due to external (non-charge related) conditions.
Claims8
A method of charging an electrochemical cell comprising the steps of:
- determining an initial cell temperature and voltage level;
- initiating a rapid charging regime;
- measuring the temperature of the cell at regular intervals after initiating said rapid charging regime to determine temperature increases in said cell between each regular interval;
- measuring battery voltage if the temperature increase in any one regular interval exceeds a preselected temperature threshold value;
- and
- terminating said rapid charging regime if the measured battery voltage exceeds a preselected voltage threshold value.
3 more elements
A method of determining the endpoint of a rapid charging regime for a battery cell in a battery charging device, said method comprising the steps of:
- measuring temperature increase of said battery cell at regular intervals during said rapid charging regime;
- measuring battery voltage if the temperature increase of said battery during any regular interval exceeds a preselected temperature threshold value;
- and
- terminating the rapid charging regime if the measured battery voltage exceeds a preselected voltage threshold value.
1 more element
Dependencies are inferred from the claim text.