A wireless charging device, comprising: a first plate core and a second plate core spaced apart from each other; a first coil layer comprising a 1-1 coil (c1-1) disposed on the first plate core and a 1-2 coil (c1-2) disposed on the second plate core; and a second coil layer disposed above the first coil layer, the second coil layer comprising a 2-1 coil (c2-1) partially overlapped with the 1-1 coil (c1-1), a 2-2 coil (c2-2) partially overlapped with at least one of the 1-1 coil (c1-1) and the 1-2 coil (c1-2), and a 2-3 coil (c2-3) partially overlapped with the 1-2 coil (c1-2); characterised in that it further comprises a third coil layer disposed above the second coil layer, the third coil layer comprising a 3-1 coil (c3-1) partially overlapped with at least one of the 2-1 coil (c2-1) and the 2-2 coil (c2-2), and a 3-2 coil (c3-2) partially overlapped with at least one of the 2-2 coil (c2-2) and the 2-3 coil (c2-3); and a fourth coil layer disposed above the third coil layer and comprising a 4-1 coil (c4-1) partially overlapped with the 3-1 coil (c3-1) and a 4-2 coil (c4-2) partially overlapped with at least one of the 3-1 coil (c3-1) and the 3-2 coil (c3-2), wherein the 3-1 coil (c3-1) and the 4-2 coil (c4-2) are disposed symmetrical to each other with respect to a center vertical line between the first plate core and the second plate core, wherein the 3-2 coil (c3-2) and the 4-1 coil (c4-1) are disposed symmetrical to each other with respect to the center vertical line between the first plate core and the second plate core, wherein an area where the 3-1 coil (c3-1), the 3-2 coil (c3-2) and the second plate core overlap is larger than an area where the 3-1 coil (c3-1), the 3-2 coil (c3-2) and the first plate core overlap, and wherein an area where the 4-1 coil (c4-1), the 4-2 coil (c4-2) and the first plate core overlap is larger than an area where the 4-1 coil (c4-1), the 4-2 coil (c4-2) and the second plate core overlap. a first plate core and a second plate core spaced apart from each other; a first coil layer comprising a 1-1 coil (c1-1) disposed on the first plate core and a 1-2 coil (c1-2) disposed on the second plate core; and a second coil layer disposed above the first coil layer, the second coil layer comprising a 2-1 coil (c2-1) partially overlapped with the 1-1 coil (c1-1), a 2-2 coil (c2-2) partially overlapped with at least one of the 1-1 coil (c1-1) and the 1-2 coil (c1-2), and a 2-3 coil (c2-3) partially overlapped with the 1-2 coil (c1-2); characterised in that it further comprises a third coil layer disposed above the second coil layer, the third coil layer comprising a 3-1 coil (c3-1) partially overlapped with at least one of the 2-1 coil (c2-1) and the 2-2 coil (c2-2), and a 3-2 coil (c3-2) partially overlapped with at least one of the 2-2 coil (c2-2) and the 2-3 coil (c2-3); and a fourth coil layer disposed above the third coil layer and comprising a 4-1 coil (c4-1) partially overlapped with the 3-1 coil (c3-1) and a 4-2 coil (c4-2) partially overlapped with at least one of the 3-1 coil (c3-1) and the 3-2 coil (c3-2), wherein the 3-1 coil (c3-1) and the 4-2 coil (c4-2) are disposed symmetrical to each other with respect to a center vertical line between the first plate core and the second plate core, wherein the 3-2 coil (c3-2) and the 4-1 coil (c4-1) are disposed symmetrical to each other with respect to the center vertical line between the first plate core and the second plate core, wherein an area where the 3-1 coil (c3-1), the 3-2 coil (c3-2) and the second plate core overlap is larger than an area where the 3-1 coil (c3-1), the 3-2 coil (c3-2) and the first plate core overlap, and wherein an area where the 4-1 coil (c4-1), the 4-2 coil (c4-2) and the first plate core overlap is larger than an area where the 4-1 coil (c4-1), the 4-2 coil (c4-2) and the second plate core overlap.