Life cycle extending batteries and battery charging means, method and apparatus
First Claim
1. A method of battery charging comprising the steps of:
- a. collecting characteristic battery data of the battery, said characteristic battery data relating to charging characteristics of the battery and including charging current rate, ambient temperature, battery voltage and state-of-charge of the battery;
b. determining a full charge voltage of the battery, said full charge voltage corresponding to a state of full charge of said battery;
c. determining a stop-charge voltage, said stop-charge voltage being below said full charge voltage and being a voltage above which the rate of increase of battery temperature begins to increase;
d. determining the ambient temperature, and selecting a charging current rate; and
e. charging the battery until said stop-charge voltage is reached.
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Abstract
A method of battery charging includes a first step of collecting characteristic battery data of the battery. This characteristic battery data relates to charging characteristics of the battery and includes charging current rate, ambient temperature, battery voltage and state-of-charge of the battery. A full charge voltage of the battery is determined, which corresponds to a state of full charge of the battery. A stop-charge voltage is determined, this stop-charge voltage being below the full charge voltage and being a voltage above which the rate of increase of battery temperature begins to increase. The ambient temperature is determined, and a charging current rate is selected. The battery is charged until the stop-charge voltage is reached.
37 Citations
17 Claims
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1. A method of battery charging comprising the steps of:
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a. collecting characteristic battery data of the battery, said characteristic battery data relating to charging characteristics of the battery and including charging current rate, ambient temperature, battery voltage and state-of-charge of the battery;
b. determining a full charge voltage of the battery, said full charge voltage corresponding to a state of full charge of said battery;
c. determining a stop-charge voltage, said stop-charge voltage being below said full charge voltage and being a voltage above which the rate of increase of battery temperature begins to increase;
d. determining the ambient temperature, and selecting a charging current rate; and
e. charging the battery until said stop-charge voltage is reached. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A battery charger comprising a controller for collecting characteristic battery data, a memory for storing said collected characteristic battery data and a charging current source, said characteristic battery data relating to charging characteristics of the battery and including charging current rate, ambient temperature, battery voltage and state-of-charge of the battery;
- wherein said controller is adapted to;
a. determine a full charge voltage of the battery, said full charge voltage corresponding to a state of full charge of said battery;
b. determine a stop-charge voltage, said stop-charge voltage being below said full charge voltage and being a voltage above which the rate of increase of battery temperature begins to increase;
c. determine the ambient temperature, and selecting a charging current rate; and
d. control said charging current source to provide charging current to the battery until said stop-charge voltage is reached. - View Dependent Claims (14, 15, 16, 17)
- wherein said controller is adapted to;
Specification