CHARGING SYSTEM AND CHARGING METHOD FOR LITHIUM ION BATTERY PACK

摘要

PROBLEM TO BE SOLVED: To properly charge each lithium ion secondary battery without preparing a balancing circuit. SOLUTION: When a whole lithium ion battery pack 20 is charged by a power supply system 3 and voltage of the whole lithium ion battery pack 20 reaches to a designated total voltage, or when voltage of either of lithium ion cells 2 reaches the designated voltage, charging on the basis of the power supply system 3 is stopped, and each lithium ion cell 2 is sequentially charged with a battery charger 4. COPYRIGHT: (C)2011,JPO&INPIT