Wireless power reception apparatus and a method of manufacturing the same
A method of manufacturing a wireless power reception apparatus includes: forming a lower tray that includes a thermally conductive material and accommodates and fix a coil winding; arranging a coil winding on the lower tray; forming a magnetic field shielding plate so as to accommodate and fix a plurality of magnetic tiles at predetermined intervals; forming a coupled member of a magnetic tiles-magnetic field shielding plate by arranging the plurality of magnetic tiles at the predetermined intervals on the magnetic field shielding plate; forming a thermally conductive polymer molding layer by applying a thermally conductive polymer molding solution to fill spaces between the coil winding and the coupled member of a magnetic tiles-magnetic field shielding plate and bonding the plurality of magnetic tiles and the coil winding such that the plurality of magnetic tiles are positioned over the coil winding; and curing the thermally conductive polymer molding layer.
1. A wireless power reception apparatus comprising:
a lower tray that includes a thermally conductive material and is formed to accommodate and fix a coil winding;
the coil winding that is positioned on the lower tray and generates magnetically inductive power;
a plurality of magnetic tiles that are positioned over the coil winding;
a magnetic field shielding plate that shields a magnetic field, accommodates the plurality of magnetic tiles, and fixes the plurality of magnetic tiles at predetermined intervals with convex parts to form a coupled member of the magnetic tiles-magnetic field shielding plate;
a metal shielding layer formed on the magnetic field shielding plate; and
a thermally conductive polymer molding layer that is located between the coil winding and the plurality of magnetic tiles, fills spaces between the coil winding on the lower tray and the coupled member of the magnetic tiles-magnetic field shielding plate, and bonds the coil winding on the lower tray and the coupled member of the magnetic tiles-magnetic field shielding plate,
wherein the thermally conductive polymer molding layer fills the spaces between the coil winding on the lower tray and the coupled member of the magnetic tiles-magnetic field shielding plate, spaces between coils of the coil winding, and spaces between the plurality of magnetic tiles.
2. The wireless power reception apparatus according to claim 1 ,
wherein the magnetic tiles include a soft magnetic material, which includes at least one of ferrite, permalloy, iron (Fe), a soft magnetic composite (SMC), permalloy (Fe50Ni50), Mn—Zn ferrite, Ni—Zn ferrite, Fe-(1 to 6.5 wt % of Si)—Cr, sendust (Fe85Si9.5A15.5), Fe amorphous (Fe78B13Si9), Co amorphous (Co67Fe4B14.5Si4.5), and nanocrystals.
3. The wireless power reception apparatus according to claim 1 ,
wherein the thermally conductive polymer molding solution includes a mixture of a polymer including at least one of epoxy, silicon, and urethane and at least one thermally conductive filler of alumina, aluminum hydroxide (Al(OH)3 or ATH), and boron nitride (BN).
4. The wireless power reception apparatus according to claim 1 ,
wherein the thermally conductive polymer molding layer includes a mixture of a heat-resistant polymer and thermally conductive fillers.
5. The wireless power reception apparatus according to claim 1 ,
wherein the thermally conductive polymer molding layer includes a mixture of thermally conductive polymers in which soft magnetic metal particles are dispersed.
6. The wireless power reception apparatus according to claim 5 ,
wherein the soft magnetic metal particles include at least one of iron (Fe), permalloy (Fe50Ni50), Mn—Zn ferrite, Fe-(1 to 6.5 wt % of Si), sendust (Fe85Si9.5A15.5), Fe amorphous (Fe78B13Si9), Co amorphous (Co67Fe4B14.5Si4.5), and a nanocrystal alloy or an alloy thereof, and
wherein the thermally conductive polymer includes at least one of epoxy, silicon, and urethane or a mixture thereof.