Secondary battery state management system, battery charger, secondary battery state management method, and electrical characteristics measurement method

A battery charger that charges a secondary battery, comprising:

• an electrical characteristic measuring unit that measures electrical characteristics during charging of the secondary battery;
• and
• a transmission unit that transmits electrical characteristic information which is information that indicates the electrical characteristics of the secondary battery measured by the electrical characteristic measuring unit to a determining device that compares the received electrical characteristic information with the stored history of the electrical characteristic information of the same secondary battery to determine the state of the secondary battery.

A secondary battery state management method comprising:

• allowing a battery charger that charges a secondary battery to measure electrical characteristics during charging;
• and
• allowing a storage server that includes a measurement information storage unit that stores the history of electrical characteristic information which is information indicating the electrical characteristics for each secondary battery to compare the electrical characteristic information of the secondary battery measured during charging with the electrical characteristic information of the same secondary battery stored in the measurement information storage unit to determine the state of the secondary battery.

An electrical characteristics measurement method comprising:

• allowing a battery charger that charges a secondary battery to measure electrical characteristics during charging of the secondary battery;
• and
• allowing the battery charger to transmit electrical characteristic information which is information that indicates the measured electrical characteristics of the secondary battery to a determining device that compares the received electrical characteristic information with the stored history of the electrical characteristic information of the same secondary battery to determine the state of the secondary battery.

A computer readable information recording medium storing an electrical characteristics measurement program that is mounted on a computer that charges a secondary battery, when executed by a processor, performs a method for:

• measuring electrical characteristics during charging of the secondary battery;
• and
• transmitting electrical characteristic information which is information that indicates the electrical characteristics of the secondary battery measured to a determining device that compares the received electrical characteristic information with the stored history of the electrical characteristic information of the same secondary battery to determine the state of the secondary battery.