Wireless power transmitting module including accommodating portion and auxiliary shielding sheet

1 . A wireless power transmitting module, comprising:

a coil unit provided as a flat coil including a coil body in which a conductive member having a predetermined length is wound in one direction, and a pair of terminal portions extending from the coil body by a predetermined length for electrical connection;

a main shielding sheet disposed on one surface of the coil unit to shield a magnetic field generated from the coil unit;

an accommodating portion formed through the main shielding sheet so as to accommodate the thickness of at least one of the pair of terminal portions; and

an auxiliary shielding sheet attached to one surface of the main shielding sheet so as to cover the accommodating portion in order to shield a magnetic field leaking through the accommodating portion,

wherein the auxiliary shielding sheet has a thinner thickness than the main shielding sheet,

wherein the coil unit comprises a first coil for wirelessly charging a battery of a first electronic device and a second coil for wirelessly charging a battery of a second electronic device, the second coil being provided to have a size smaller than that of the first coil and being stacked on one surface of the first coil, and

wherein the accommodating portion comprises a first accommodating portion for accommodating one of the pair of terminal portions of the first coil and a second accommodating portion for accommodating one of the pair of terminal portions of the second coil.

2 . The wireless power transmitting module of claim 1 , wherein the main shielding sheet is provided to have a thickness of 7.5 times or more than the auxiliary shielding sheet.

3 . The wireless power transmitting module of claim 1 , wherein the auxiliary shielding sheet is a ribbon sheet of an amorphous alloy or a nanocrystalline grain alloy.

4 . The wireless power transmitting module of claim 1 , wherein the auxiliary shielding sheet is provided to have a smaller area than the main shielding sheet and to have an area completely covering the accommodating portion.

5 . The wireless power transmitting module of claim 1 , wherein the wireless power transmitting module is disposed on an upper portion of a battery such that the auxiliary shielding sheet is positioned between the main shielding sheet and the battery.

6 . The wireless power transmitting module of claim 1 , wherein the main shielding sheet comprises at least one of a ferrite sheet, a ribbon sheet of an amorphous alloy, and a ribbon sheet of a nanocrystalline grain alloy.

7 . The wireless power transmitting module of claim 1 , wherein in the conductive member constituting the coil body, a plurality of wires are grouped into one to form one turn, and the plurality of wires constituting one turn of the conductive member are disposed in parallel along one surface of the main shielding sheet.

8 . The wireless power transmitting module of claim 1 , wherein:

the first coil is a flat coil formed of a coil body having a first width and having a hollow portion formed in a central portion,

the second coil is a flat coil formed of a coil body having a second width smaller than the first width and having a hollow portion formed in a central portion, and

the second coil is stacked on one surface of the first coil such that a portion corresponding to a portion of a width of the coil body is positioned in the hollow portion of the first coil.

9 . The wireless power transmitting module of claim 1 , wherein:

one surface of the coil body of the first coil is in direct contact with one surface of the main shielding sheet, and

one surface of the coil body of the second coil is spaced apart from one surface of the main shielding sheet by a thickness of the first coil.

10 . The wireless power transmitting module of claim 1 , wherein the first coil is a Qi standard A11 coil.