WIRELESS POWER TRANSMISSION DEVICE

• US 20140035381A1
• Filed: 09/14/2012
• Published: 02/06/2014
• Est. Priority Date: 08/03/2012
• Status: Abandoned Application

• Current Assignee: Primax Electronics Limited
• Original Assignee: Primax Electronics Limited
• Inventors: CHEN, CHIH HUNG
• Application Number:
  US13/616,689
• Publication Number:
  US 20140035381A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmission device includes a circuit board, heat-dissipating plate, a closed transmitter coil, and an encapsulation member. The closed transmitter coil is disposed on the circuit board. The heat-dissipating plate is disposed on the circuit board. The circuit board, the heat-dissipating plate and the closed transmitter coil are sealed by the encapsulation member. Since no gaps are formed in the encapsulation member, the foreign liquid and dust are prevented from being introduced into the encapsulation member. Moreover, since portions of the heat-dissipating plate are partially protruded outside the encapsulation member and partially exposed outside the encapsulation member, the wireless power transmission device of the present invention has enhanced heat-dissipating efficiency.

Claims

1. A wireless power transmission device for transmitting an electric power to a closed receiver coil of an electronic device, said wireless power transmission device comprising:

a circuit board;

a heat-dissipating plate disposed on said circuit board for facilitating removing heat that is generated by said circuit board;

a closed transmitter coil disposed on said heat-dissipating plate and connected with said circuit board, wherein in response to an electric current flowing through said circuit board, said closed transmitter coil results in an electromagnetic effect, wherein in response to said the electromagnetic effect, said closed transmitter coil outputs said electric power to said closed receiver coil; and

an encapsulation member for sealing said circuit board, said heat-dissipating plate and said closed transmitter coil, wherein said encapsulation member has a rectangular solid profile, wherein said heat-dissipating plate is partially exposed outside said encapsulation member.

2. The wireless power transmission device according to claim 1, further comprising a power cable, wherein a first end of said power cable is connected with said circuit board, and said power cable is penetrated through the encapsulation member, so that a second end of said power cable is connected with a power source, wherein said electric current outputted from said power source is transmitted to said closed transmitter coil through said power cable.

3. The wireless power transmission device according to claim 2, wherein said power cable is penetrated through the encapsulation member and perpendicular to a bottom surface or a lateral surface of said encapsulation member.

4. The wireless power transmission device according to claim 1, wherein said encapsulation member is made of thermosetting resin.

5. The wireless power transmission device according to claim 1, wherein said heat-dissipating plate comprises:

a main body disposed on said circuit board; and

at least one protrusion part extended from said main body and partially protruded outside said circuit board, so that a front surface of said at least one protrusion part is exposed outside a lateral surface of said encapsulation member.

6. The wireless power transmission device according to claim 5, wherein said main body and said at least one protrusion part are integrally formed with said heat-dissipating plate.

7. The wireless power transmission device according to claim 1, wherein said closed transmitter coil is disposed on said heat-dissipating plate via an adhesive, and said heat-dissipating plate is disposed on said circuit board via another adhesive.

8. The wireless power transmission device according to claim 1, wherein said electronic device further comprises:

an electronic device casing for accommodating said closed receiver coil, wherein when said electronic device casing is located near said encapsulation member or contacted with said encapsulation member, said electric power from said closed transmitter coil is received by said closed receiver coil within said electronic device casing; and

a chargeable battery disposed within said electronic device casing and connected with said closed receiver coil, wherein said electric power received by said closed receiver coil is stored in said chargeable battery.

9. The wireless power transmission device according to claim 1, wherein said electronic device further comprises:

an electronic device casing;

a protective cover for covering said electronic device casing, thereby protecting said electronic device casing, wherein said closed receiver coil is disposed within said protective cover, wherein when said protective cover is located near said encapsulation member or contacted with said encapsulation member, said electric power from said closed transmitter coil is received by said closed receiver coil within said protective cover; and

a chargeable battery disposed within said casing and connected with said closed receiver coil through said protective cover, wherein said electric power received by said closed receiver coil is stored in said chargeable battery.

10. The wireless power transmission device according to claim 1, further comprising a fixing mechanism for fixing said encapsulation member, wherein said fixing mechanism comprises a receiving recess for accommodating said encapsulation member, wherein after said encapsulation member is accommodated within said receiving recess, a lateral surface of said encapsulation member is contacted with an inner surface of said receiving recess, so that said encapsulation member is fixed within said receiving recess.