Contactless battery charger, electronic device, battery pack, and contactless charging system

摘要

A contactless charging system is made up of an electronic device and a contactless charger 200 that recharges the electronic device in a contactless manner. The electronic device transmits a full charge command indicating completion of charge. Upon receipt of the full charge command, the contactless charger shifts to a charge stop state in which charge of the electronic device is not performed. In the charge stop state, the contactless charger generates a load check signal for checking whether or not the electronic device is placed in the contactless charger in a rechargeable state, and transmits the signal. Further, the contactless charger also generates a charge restart check command for checking whether or not the electronic device requests recharge in a charge stop state, and transmits the command.

主权项

1. A contact-less charger, which is capable to charge, in a contact-less manner, an electronic device using a secondary battery as a power source, the contact-less charger comprising:
a receiving section that receives from the electronic device a signal indicating completion of charge; wherein upon receipt of the signal indicating the completion of charge, the contact-less charger shifts to a charge stop state in which the charge of the electronic device is restricted; wherein in the charge stop state, the contact-less charger intermittently generates a load check signal for checking whether or not the electronic device is placed on the contact-less charger; and wherein in the charge stop state, the contact-less charger generates a signal for checking whether or not the electronic device requires recharge after a time period, which is longer than the generation interval of the load check signal, elapses from a beginning of the charge stop state.