Wireless charging device and transportation means comprising same
AssigneeSkc Co., Ltd.
InventorsNah Young KIM, Seunghwan LEE, Jong Hak CHOI, Tae Kyoung KIM
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Abstract
A wireless charging device according to one embodiment has an inductance deviation at 80° C. of 0 or more, and has a magnetic part that has a permeability change rate (ΔP1) of 0/° C. or more, thus having excellent high-temperature stability, and being able to maintain excellent charging efficiency even at high temperature. Therefore, the wireless charging device can be useful in a transportation means such as an electric vehicle requiring large-capacity power transmission between a transmitter and a receiver.
Claims11
A wireless charging device, which comprises a coil unit;
- and a magnetic unit disposed on the coil unit, wherein the inductance deviation (ID1) at 80° C. represented by the following Equation 1 is 0 or more:
- I
-
- D
-
- 1
- =
- I
-
- 80
- -
- I
-
- 25
- I
-
- 25
- [
- Equation
-
- 1
- ]
- wherein I25 is the inductance of the wireless charging device measured at a temperature of 25° C., and I80 is the inductance of the wireless charging device measured at a temperature of 80° C.
A wireless charging device, which comprises a coil unit;
- and a magnetic unit disposed on the coil unit, wherein the first magnetic permeability change rate (ΔP1) of the magnetic unit represented by the following Equation 6 is 0/° C. or more:
- Δ
-
- P
-
- 1
- =
- P
-
- 20
- -
- P
-
- 0
- 20
-
- °
-
- C
- [
- Equation
-
- 6
- ]
- wherein P20 is the magnetic permeability of the magnetic unit measured at a temperature of 20° C., and P0 is the magnetic permeability of the magnetic unit measured at a temperature of 0° C.
A transportation means, which comprises a wireless charging device, wherein the wireless charging device comprises a coil unit;
- and a magnetic unit disposed on the coil unit, and
- the inductance deviation (ID1) of the wireless charging device at 80° C. represented by the following Equation 1 is 0 or more, or
- the first magnetic permeability change rate (ΔP1) of the magnetic unit represented by the following Equation 6 is 0/° C. or more, or
- both are satisfied:
- I
-
- D
-
- 1
- =
- I
-
- 80
- -
- I
-
- 25
- I
-
- 25
- [
- Equation
-
- 1
- ]
- wherein I25 is the inductance of the wireless charging device measured at a temperature of 25° C., and I80 is the inductance of the wireless charging device measured at a temperature of
- Δ
-
- P
-
- 1
- =
- P
-
- 20
- -
- P
-
- 0
- 20
-
- °
-
- C
- [
- Equation
-
- 6
- ]
- wherein P20 is the magnetic permeability of the magnetic unit measured at a temperature of 20° C., and P0 is the magnetic permeability of the magnetic unit measured at a temperature of 0° C.
Dependencies are inferred from the claim text.