Patent ID: 8963504
Filing Date: 2015-02-24
Classification: H01M,H02J,Y02E,Y02T

Abstract:
1. An electronic device comprising: a secondary battery capable of being charged repeatedly; a charging section which charges the secondary battery with power supplied from an external power supply section with a set charging current; a measurement section which measures an amount of charge accumulated in the secondary battery; a time information acquisition section which acquires time information; a storage section which stores charging history information created from data of a time period in which a user performs charging; a charging capability detection section which detects whether it is a state in which charging is possible from the power supply section, by transmitting a state notification signal that performs notification of detecting connection and disconnection to the power supply section; and a control section which has a discharging history information creation section which, when receiving the state notification signal, causes the measurement section to measure an amount of charge, and creates and stores in the storage section discharging history information based on the amount of charge, a charging capacity setting section which sets a charging capacity to a restricted charging capacity, which is restricted, based on the discharging history information, a chargeable time estimation section that estimates chargeable time based on the charging history information and the time information, and a charging current setting section that calculates a restricted charging current which enables the secondary battery to be charged up to the restricted charging capacity within the chargeable time, based on the amount of charge acquired from the measurement section, and sets the restricted charging current in the charging section, wherein the charging history information is expressed as a plurality of discrete charging histories corresponding to respective pre-set times of day and indicating, for each of the pre-set times, whether a connection state of the external power supply section is detected at the pre-set time, each discrete charging history being updated according to an equation that expresses the discrete charging history as a function of a prior discrete charging history.