Method for charging lithium secondary battery

Details Method for charging lithium secondary battery Method for charging lithium secondary battery

1999-01-18

2000-06-27

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320132, 324430, H02J 700

Patent

active

060810971

ABSTRACT:
A method for charging a secondary battery is disclosed. The method comprises the steps of detecting an impedance of the battery; charging the battery with a substantially constant first current having a value smaller than a predetermined current value if the detected impedance of the battery is equal to or greater than a predetermined impedance value; charging the battery with a substantially constant second current having a value equal to or greater than the predetermined current value if the detected impedance is less than the predetermined impedance value; and terminating charging the battery with the first and second constant currents when the closed circuit voltage of the battery reaches a predetermined voltage value.

REFERENCES:
patent: 5576608 (1996-11-01), Nagai et al.
patent: 5606240 (1997-02-01), Kokuga et al.
patent: 5637981 (1997-06-01), Nagai et al.

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