BATTERY CHARGING METHOD AND BATTERY PACK USING THE METHOD

摘要

The present invention relates to a battery pack which can charge a battery stably. The battery pack according to an embodiment of the present invention comprises: a chargeable battery; a battery management part which charges the battery by dividing a battery charging period into multiple charging sections including a constant current supply section and a constant voltage supply section; and a resistance judgment part to estimate resistance of the battery. The battery management part changes the charging period from the constant voltage supply section of an i_th charging section (where i is a natural number) to the constant current supply section of a (i+1)_th charging section in correspondence to the resistance of the battery.