Patent ID: 9601800
Date: 2017-03-21
CPC Classifications: H01M,Y02E

Claim:
1. A charging method to charge a lithium on battery, comprising: charging an assembled battery including a plurality of lithium on battery cells connected in series, a lithium on battery cell of the plurality of lithium on battery cells including a lithium compound as a positive electrode active material used for a positive electrode material, through a quasi-constant voltage charging procedure in which a charging current applied to the assembled battery is gradually reduced and an application voltage is reduced according to a state of charge of the lithium on battery cell, the lithium compound comprising iron, and the assembled battery including a balancing circuit for cell balancing during the charging; and reducing the charging current as the charge proceeds toward a late stage during the charging of the assembled battery, wherein the charging of the assembled battery comprises charging the assembled battery through a charging circuit having dropping characteristics for reducing the voltage applied to the assembled battery as the charging current increases, the charging circuit supplying alternating current power from an alternating current power source to a rectifier via a leakage transformer, rectifying an alternating current by the rectifier, and supplying direct current power being converted from the alternating current power to the assembled battery.