Patent ID: 7863860

Claim:
A battery cover adapted to placing on an RF (radio frequency) emitter for electrically charging in a non-touch induction mode, said battery cover at least comprises: a cover used to cover a battery groove of an electric appliance, and having a set of pins directing to said battery groove to electrically connect with chargeable batteries; and a non-touch induction type electric power generating unit provided in said cover, said non-touch induction type electric power generating unit being adapted to generating RF signals of an RF emitter to generate electric power by inducing, and electrically charging said chargeable batteries through said set of pins, wherein said non-touch induction type electric power generating unit includes: a first harmonic oscillation circuit having a first coil and being adapted to getting better energy source when it enters an effective RF signal zone of said RF (radio frequency) emitter; a rectifying wave filtering circuit connecting with said first harmonic oscillation circuit, to make said energy source become electric DC current; an electric charging circuit connecting with said rectifying wave filtering circuit for charging said chargeable batteries through said set of pins; a first processing unit connecting with said electric charging circuit to detect state of charging of said chargeable batteries; and a first modulating circuit connecting between said first processing unit and said rectifying wave-filtering circuit for releasing signals of state of charging by a load changing mode to transmit data through said first coil for inducing by said RF emitter.