Abstract: The present disclosure provides a control device for a secondary battery, and the control device includes a controller configured to correct battery characteristics on an open circuit voltage to a remaining capacity of the secondary battery. In the control device for the secondary battery, the controller acquires data of a plurality of open circuit voltages in the battery characteristics during charging the secondary battery. When the secondary battery is fully charged, the controller corrects the open circuit voltages between respective pairs selected and combined from at least one part of the data of the plurality of open circuit voltages. The controller weighted-averages and corrects full charge capacities, which are calculated by the correction of the open circuit voltages between the respective data pairs, with differences each between respective remaining capacities each corresponding between the respective data pairs.

Abstract: The electronic device includes a main battery that supplies electric power to a load circuit, a sub-battery that supplies electric power to the load circuit in a case where the main battery is detached from the electronic device, a first charging circuit that charges the main battery, a second charging circuit that charges the sub-battery, and a controller that controls the first and second charging circuits. The controller changes a setting value of a charging electric current for the sub-battery in the second charging circuit based on an amount of charge of the main battery.

Abstract: An electronic device comprises a main battery used as a drive power source for driving the electronic device, a secondary battery used as a drive power source instead of the main battery when the main battery cannot be used, a battery detection unit that detects an event of removal of the main battery from the electronic device, and a power control unit that changes the drive power source from the main battery to the secondary battery and controls operation of the electronic device to reduce power consumption by the electronic device when removal of the main battery is detected by the battery detection unit.

Abstract: An electronic device comprises a main battery used as a drive power source for driving the electronic device, a secondary battery used as a drive power source instead of the main battery when the main battery cannot be used, a battery detection unit that detects an event of removal of the main battery from the electronic device, and a power control unit that changes the drive power source from the main battery to the secondary battery and controls operation of the electronic device to reduce power consumption by the electronic device when removal of the main battery is detected by the battery detection unit.

Abstract: A charge control device of a secondary battery that allows the use of an electronic apparatus for a long period using a single initial charging, and is capable of extending battery life. The charging device includes a charge circuit for supplying charging current to secondary batteries, a voltage detection circuit for detecting the voltage of secondary batteries, a current detection circuit for detecting the charging current in secondary batteries, a memory such as an EEPROM for recording the number of times of charging or total charge integrated amount in secondary batteries, and a microcontroller for controlling charge circuit, changing over to constant voltage charge after charging secondary batteries 2 at constant current, and decreasing the voltage in constant voltage charging depending on the number of times of charge or total charge integrated amount recorded in the memory of EEPROM.

Abstract: The invention presents a charge control device of secondary battery allowing to use an electronic apparatus for a long period by single charging initially, and capable of extending battery life in a long span. It comprises charge circuit 6 for supplying charging current to secondary batteries 24, 25, 26, voltage detection circuit 12 for detecting the voltage of secondary batteries 24, 25, 26, current detection circuit 16 for detecting the charging current in secondary batteries 24, 25, 26, a memory such as EEPROM 33 for recording the number of times of charging or total charge integrated amount in secondary batteries, and microcontroller 5 as control means for controlling charge circuit 6, changing over to constant voltage charge after charging secondary batteries 24, 25, 26 at constant current, and decreasing the voltage in constant voltage charging depending on the number of times of charge or total charge integrated amount recorded in the memory of EEPROM 33.