Charging method of a secondary battery
AssigneeSanyo Electric Co., Ltd.
InventorTetsuya Okada
Life of this patent
Estimating the term…
Abstract
A secondary battery is charged in alternating charging and pulse-charging periods in which the secondary battery is continuously charged during the charging periods and the secondary battery is charged in a series of charging pulses during the pulse-charging periods. The terminal voltage or the temperature of the secondary battery may be sampled during at least one interval between the pulses in a pulse-charging period to detect a full charge level or an excessive temperature, respectively. Such an arrangement can reduce charging time and facilitate accurate monitoring of the terminal voltage or the temperature.
Claims15
A method for charging a secondary battery, the method comprising:
- charging the secondary battery in alternating continuous charging periods and pulse-charging periods in which the secondary battery is continuously charged during each continuous charging period and the secondary battery is charged by a series of charging pulses during each pulse-charging period;
- sampling a terminal voltage of the secondary battery during at least one interval between the pulses during a pulse-charging period;
- and
- modifying the charging step based on the sampled terminal voltage.
A method of charging a secondary battery, the secondary battery having terminals, by supplying a current through the terminals of the second battery, the method comprising:
- charging the secondary battery in alternating continuous charging periods and pulse-charging periods in which the secondary battery is continuously charged during each continuous charging period and the secondary battery is charged by a series of charging pulses during each pulse-charging period;
- sampling a temperature of the secondary battery during at least one interval between the pulses during a pulse-charging period to provide a sampled temperature;
- and
- modifying the charging based on the sampled temperature.
A charging apparatus for charging a secondary battery, the apparatus comprising:
- a circuit for charging the secondary battery in alternating continuous charging periods and pulse-charging periods in which the secondary battery is continuously charged during each continuous charging period and the secondary battery is charged by a series of charging pulses during each pulse-charging period;
- a circuit for sampling the terminal voltage of the secondary battery during at least one interval between the pulses during a pulse-charging period;
- and
- a circuit for modifying the charging based on the sampled terminal voltage.
A charging apparatus for charging a secondary battery, comprising:
- a circuit for charging the secondary battery in alternating continuous charging periods and pulse-charging periods in which the secondary battery is continuously charged during each continuous charging period and the secondary battery is charged by a series of charging pulses during each pulse-charging period;
- a circuit for sampling a temperature of the secondary battery during at least one interval between the pulses during a pulse-charging period to provide a sampled temperature;
- and
- a circuit for modifying the charging based on the sampled temperature.
Dependencies are inferred from the claim text.