Non-contact charging module and reception-side and transmission-side non-contact charging apparatuses using the same
View Patent ↗It is an object to provide a non-contact charging module that uses a magnet included in a counterpart-side non-contact charging module or does not use the magnet when aligning with the counterpart-side non-contact charging module is performed. An L value of a coil that is provided in the non-contact charging module is not changed. This non-contact charging module includes a planar coil portion where electrical lines are wound and a magnetic sheet that places a coil surface of the planar coil portion and faces the coil surface of the planar coil portion, and in the magnetic sheet, a hole portion is provided at the position corresponding to a hollow portion of the planar coil portion.
1. A non-contact charging module that performs power transmission with another non-contact charging module, the non-contact charging module comprising: a planar coil in which a conducting wire is wound; and a magnetic sheet that places the planar coil, wherein the magnetic sheet has a hole provided within an inner winding of the planar coil; and the non-contact charging module has a case where a magnet included within an inner winding of the planar coil in another non-contact charging module is used to align with the non-contact charging module or a case where the magnet is not used to align with the transmission-side non-contact charging module; wherein both first L value which is the L value of the planar coil when a magnet is included within an inner winding of the planar coil in another non-contact charging module and second L value which is the L value of the planar coil when a magnet isn't included within an inner winding of the planar coil in another non-contact charging module are between third L value and fourth L value, the third L value is the L value of a planar coil which is placed on a magnetic sheet which doesn't have a hole provided within an inner winding of the planar coil when a magnet is included within an inner winding of the planar coil in another non-contact charging module, and the fourth L value is the L value of a planar coil which is placed on a magnetic sheet which doesn't have a hole provided within an inner winding of the planar coil when a magnet isn't included within an inner winding of the planar coil in another non-contact charging module.
2. The non-contact charging module according to claim 1 , wherein the hole is a through-hole.
3. The non-contact charging module according to claim 1 , wherein the hole is a concavity.
4. The non-contact charging module according to claim 3 , wherein the depth of the concavity is 40 to 60% of a thickness of the magnetic sheet.
5. The non-contact charging module according to claim 1 , wherein a shape of a top surface of the hole is the same as a shape of the inner winding of the planar coil.
6. The non-contact charging module according to claim 1 , wherein all ends of the hole are at the same distance from the inner winding of the planar coil.
7. The non-contact charging module according to claim 1 , wherein an area of the hole is equal to or more than 30% of an area of the inner winding of the planar coil.
8. The non-contact charging module according to claim 1 , wherein the hole is formed larger than the magnet.
9. The non-contact charging module according to claim 1 , wherein a center of the hole coincides with a center of the inner winding of the planar coil.
10. The non-contact charging module according to claim 1 , wherein the inner winding of the planar coil is in a substantially rectangular shape.
11. The non-contact charging module according to claim 1 , wherein the conducting wire is wound in a substantially rectangular shape in the planar coil.
12. The non-contact charging module according to claim 1 , wherein the planar coil is formed by spirally winding the conducting wire.
13. The non-contact charging module according to claim 1 , further comprising an alignment module, wherein the alignment module does not use a magnet to align the other non-contact charging module with the non-contact charging module.
14. The non-contact charging module according to claim 1 , wherein the magnetic sheet touches the coil.
15. A reception-side non-contact charging apparatus, comprising the non-contact charging module according claim 1 , that receives power from a transmission-side non-contact charging apparatus.
16. A transmission-side non-contact charging apparatus comprising the non-contact charging module according to claim 1 , that transmits power to a reception-side non-contact charging apparatus.