Patent ID: 9350188
Filing Date: 2016-05-24
CPC Classification: G03G,H02J

Claim Text:
1. An electronic device comprising: a processing unit that includes an accepting part configured to accept a processing request from an external device, and is configured to execute a process specified by the processing request; a secondary battery connected with an external power source; and a power-source device configured to transition from a waiting state to an operating state when the accepting part accepts a processing request while in the waiting state, and then transition from the operating state to the waiting state when the processing unit completes executing the process, wherein, in the waiting state, power supply from the external power source to the processing unit is stopped and the secondary battery supplies power to the accepting part, and in the operating state, power is supplied from the external power source to the processing unit, the power-source device including a controller that is configured to execute a first charge control operation to cause the external power source to charge the secondary battery when, in the operating state, a voltage of the secondary battery is equal to or lower than a threshold voltage, and end executing the first charge control operation when the operating state transitions to the waiting state, the controller updating the threshold voltage in response to an increase in the number of times the first charge control operation is executed, wherein the first charge control operation is a charge control operation in which the controller charges the secondary battery intermittently, and wherein the controller performs a pulse charge control as the first charge control operation based on a duty ratio, a charge time and a current value that are set in advance.