BATTERY-DRIVEN APPARATUS AND BATTERY PACK

摘要

PROBLEM TO BE SOLVED: To allow a battery-driven apparatus side to easily learn the state of a battery pack in the battery pack capable of non-contact charging.SOLUTION: A battery pack comprises: a power reception coil 1 that is capable of electromagnetic coupling with a power transmission coil 113 built in a charging pad 110; a non-contact charging circuit 95 that converts power received by the power reception coil 1 and is able to charge secondary battery cell 2; a pack control unit 91 for controlling the non-contact charging circuit 95; and a pack side connection terminal that is connected with the pack control unit 91 and that is for electrically connecting with an apparatus side connection terminal of a driven apparatus body 101. The connection terminal includes a state communication terminal 106 for communicating with the driven apparatus body 101. Regarding prescribed information on non-contact charging when the battery pack 90 is placed on the charging pad 110 and non-contact charging is performed, the pack control unit 91 transmits a pulse signal associated with the information in advance to the driven apparatus body 101 via the state communication terminal 106.