Patent ID: 8935113
Filing Date: 2015-01-13
Classification: G01R,H01M,H02J,Y02E,Y02P,Y02T

Abstract:
1. A secondary battery managing method for managing a secondary battery, comprising: (a) a cathode comprising a first cathode material and a second cathode material, wherein locations of main peaks exhibited in dQ/dV distribution of the first and second cathode materials are different from each other; (b) an anode; and (c) a separator, the method comprising: obtaining a current and a voltage of the secondary battery during operation of the secondary battery over a predetermined amount of time; preparing a voltage profile and optionally a current profile from the measured current and voltage of the secondary battery; detecting a voltage relaxation during operation of the secondary battery, said voltage relaxation including a transfer of operating ions between the first and second cathode materials when the secondary battery comes to an idle state or a no-load state; and if a voltage relaxation is detected, estimating a state of charge (SOC) using the voltage profiles of the secondary battery.