Wireless power receiving device for electric vehicle

1. A wireless power receiving device for an electric vehicle, the wireless power receiving device comprising:

a wireless power receiving coil configured to receive wireless power transmitted from the outside;

a coil support member configured to prevent movement of the wireless power receiving coil by fixing the wireless power receiving coil through a position fixing means formed at a position corresponding to the wireless power receiving coil;

a ferrite core including a plurality of ferrite block bodies having predetermined areas and disposed on one surface of the coil support member to be adjacent to each other; and

a plate-shaped metal plate provided with a predetermined area, disposed to cover one surface of the ferrite core, and provided as a metal plate to shield an electromagnetic wave,

wherein the ferrite core serves as a main shielding material to shield the magnetic field generated from the wireless power receiving coil, and

wherein the coil support member is a composite in which the magnetic substance is dispersed in a polymer so as to serve as an auxiliary shielding material that assists the ferrite core and shields a magnetic field.

2. The wireless power receiving device of claim 1 , wherein the position fixing means is an accommodating groove formed by recessing the one surface of the coil support member.

3. The wireless power receiving device of claim 1 , wherein the position fixing means is a pair of protrusions formed to protrude from the one surface of the coil support member at an interval so that a conductive member configuring the wireless power receiving coil is fitted therein.

4. The wireless power receiving device of claim 1 , wherein the magnetic substance includes at least one type of an amorphous alloy, a nano-crystalline alloy, a ferrite, silicon steel, and permalloy.

5. The wireless power receiving device of claim 1 , further comprising a housing-shaped case having an inner space with an open one side to accommodate the wireless power receiving coil, the coil support member, and the ferrite core,

wherein the case includes a bottom portion having a predetermined area, and a sidewall portion protruding from an edge of the bottom portion to a predetermined height to form the inner space, and

an edge of the metal plate is coupled to the sidewall portion via a fastening member to cover the open one side of the inner space.

6. The wireless power receiving device of claim 5 , wherein the case is made of a plastic material having a heat dissipation property.

7. The wireless power receiving device of claim 1 , further comprising a plate-shaped shielding sheet disposed between the ferrite core and the metal plate.

8. The wireless power receiving device of claim 7 , wherein a boundary region between two ferrite block bodies disposed adjacent to each other is disposed to be positioned in an inner region of the shielding sheet, and thus a magnetic field leaking into a gap between the two ferrite block bodies is blocked by the shielding sheet.

9. The wireless power receiving device of claim 7 , wherein the shielding sheet is a ribbon sheet including at least one type of an amorphous alloy and a nano-crystalline alloy.