Electric vehicle, charging station, and wireless charging system for electric vehicle

Abstract

The electric mobility device includes a footboard portion, a steering handle for controlling direction, a storage frame extending from the footboard portion, an extension portion configured to be rotatable on the storage frame and including a post for supporting the steering handle, and a power receiving device configured to encase at least a portion of the outer surface of the extension portion.

Description

[Technical field]

[0001] The present invention relates to an electric transportation device, a charging station, and a wireless charging system for an electric transportation device, and more particularly to an electric transportation device, a charging station, and a wireless charging system for an electric transportation device with an improved structure. [Background technology]

[0002] Generally, wireless charging methods use electromagnetic induction to charge the battery. A wireless charger (wireless power transmitter) has a primary coil (transmitting coil) and an electronic device to be charged (wireless power receiver) has a secondary coil (receiving coil). The current generated by magnetic induction between the primary and secondary coils is converted into energy to charge the battery.

[0003] An electric transportation device means a device configured to be movable using electricity as a power source, and examples thereof include an electric kick scooter, an electric car, an electric wheel, an electric bicycle, an electric motorcycle, an electric two-wheeled parallel cart, a robot vacuum cleaner, etc. Such an electric transportation device includes a battery and can be used by being charged via a wire or by using a wireless charging method as described above.

[0004] An electric mobile device using a wireless charging method is equipped with a shielding member on the back of the primary and secondary coils. However, the shielding member is limited in structure, function, shape, etc., and is therefore flat, which limits the structure of the wireless charging device and system. In addition, in the case of a wireless charging method, the power transmitting device and the power receiving device must be arranged in corresponding positions so that the primary and secondary coil parts face each other, but if they are not aligned in this way, there is a problem that charging efficiency is reduced or charging is not possible. Summary of the Invention [Problem to be solved by the invention]

[0005] In one aspect of the present invention, a wireless charging system for an electric mobility device with an improved structure is provided.

[0006] According to one aspect of the present invention, there is provided a wireless charging system for an electric mobility device with improved charging efficiency.

[0007] In one aspect of the present invention, a wireless charging system for an electric mobility device with an improved charging structure is provided. [Means for solving the problem]

[0008] The electric mobility device according to the concept of the present invention includes a footboard portion, an extension portion including a storage frame extending from the footboard portion and a post rotatably connected to the storage frame, a steering handle connected to the post for controlling the direction, and a power receiving device enclosing at least a portion of the outer surface of the extension portion.

[0009] The power receiving device may include a curved portion that is curved to correspond to an outer surface of the extension portion.

[0010] The power receiving device may include a receiving coil unit, and a magnetic unit in which the receiving coil unit is disposed, the magnetic unit being curved to correspond to the curved portion.

[0011] The magnetic section may include a magnetic body having a coil fixing surface on which the receive coil section is fixed, and at least a portion of which is curved to correspond to the curved section.

[0012] The magnetic portion may include a coil guide portion formed to protrude from the coil mounting surface to guide a magnetic flux generated by the receiving coil portion.

[0013] The receiving coil unit corresponds to a transmitting coil unit of a charging station, and the power receiving device includes a housing that accommodates the magnetic unit and an impact absorbing member formed to protrude from the housing to face the transmitting coil unit, and the impact absorbing member can separate the receiving coil unit and the transmitting coil unit by a set distance.

[0014] The charging station according to the concept of the present invention is a charging station including a power transmitting device for transmitting wireless power to a power receiving device of an electric mobile device, and is configured to form a concave accommodation space for accommodating a curved surface of the power receiving device.

[0015] The power transmitting device includes a magnetic section in which a transmitting coil section that transmits wireless power to the power receiving device is disposed, and the magnetic section includes a coil fixing surface on which the transmitting coil section is fixed, and may include a magnetic body that is curved to correspond to the curved surface of the power receiving device.

[0016] The magnetic section may include a coil guide section formed to protrude from the coil mounting surface to guide a magnetic flux generated by the transmission coil section.

[0017] The station may include a station body and a gripping portion formed in the station body to form a gripping space for accommodating the electric mobility device, and the power transmitting device may be configured to be exposed to the gripping space so as to transmit wireless power to the power receiving device accommodated in the gripping space.

[0018] The power transmission device is arranged to face the holding space and includes a plurality of transmitting coil sections arranged along the inner circumference of the holding portion, and at least one of the plurality of transmitting coil sections can be configured to correspond to a receiving coil section of the electric mobility device.

[0019] The electric travel device can be located at a travel position where it can travel and at a charging position where it is placed in the charging station and receives wireless power from the power transmission device. The charging station includes a guide part that guides the electric travel device along a movement direction of the electric travel device from the travel position to the charging position, and the guide part can include a first guide part that guides the electric travel device in a left-right direction and a second guide part that guides the electric travel device in a front-rear direction.

[0020] The second guide portion may include a first inclined surface formed at an incline so that the electric moving device ascends along the movement direction, and a second inclined surface extending from the first inclined surface along the movement direction and inclined downward along the movement direction so that the electric moving device remains at the charging position.

[0021] The second guide portion may be configured to operate between a first guide position where it is fixed to the ground and a second guide position where it is tilted at a certain angle with respect to the ground to move the electric mobility device placed on the top of the second guide portion to the charging position.

[0022] The electric mobility device includes front wheels and rear wheels, and the second guide portion may include an inclined surface formed at an angle so that the electric mobility device rises along the movement direction, and a step portion arranged from the inclined surface along the movement direction and configured to have a step from an end of the inclined surface so that the front wheels can be accommodated.

[0023] A wireless charging system for an electric mobility device according to the concept of the present invention includes an electric mobility device including a battery and a power receiving device that supplies power to the battery, and a charging station including a power transmitting device that transmits wireless power to the power receiving device, the charging station being configured so that the electric mobility device can be stationary, and the power receiving device is configured to encase at least a portion of the outer surface of the electric mobility device. Effect of the Invention

[0024] According to one aspect of the present invention, the charging structure can be improved to increase the charging efficiency of an electric transportation device.

[0025] According to one aspect of the present invention, the wireless charging device is configured to correspond to the outer shape of the electric mobility device, so that it can be securely attached and the efficiency of wireless charging can be improved.

[0026] According to one aspect of the present invention, the shape of the wireless charging device can be configured to correspond to the outer surface of the electric mobility device, thereby minimizing collisions with obstacles placed on the path of movement.

[0027] According to one aspect of the present invention, connection failure between a power transmitting device and a power receiving device can be prevented, and a stable connection between them can be achieved.

[0028] According to one aspect of the present invention, an electric transportation device can be stably secured to a charging station. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 is a perspective view of an electric mobile device and a charging station of a wireless charging system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side view of a wireless charging system according to one embodiment of the present invention. [Diagram 3] FIG. 3 is a partially enlarged view of a wireless charging system according to an embodiment of the present invention. [Figure 4] FIG. 4 is a diagram of an electric transportation device moving to a charging station in a wireless charging system according to an embodiment of the present invention. [Diagram 5] FIG. 5 is an enlarged view of a power receiving device in an electric mobile device of a wireless charging system according to an embodiment of the present invention. [Figure 6] FIG. 6 is an exploded perspective view of a power receiving device of a wireless charging system according to an embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA' in FIG. [Figure 8] FIG. 8 is an enlarged view of a power transmitting device in a charging station of a wireless charging system according to an embodiment of the present invention. [Figure 9] FIG. 9 is an exploded perspective view of a power transmitting device in a charging station of a wireless charging system according to an embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view taken along line BB' in FIG. [Figure 11a] FIG. 11a is a diagram illustrating an operation of an electric mobile device being settled in a charging station in a wireless charging system according to another embodiment of the present invention. [Figure 11b] FIG. 11b is a diagram illustrating an operation of an electric transportation device being settled in a charging station in a wireless charging system according to another embodiment of the present invention. [Figure 12a] FIG. 12b is a diagram illustrating an operation of an electric mobile device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention. [Figure 12b] FIG. 12b is a diagram illustrating an operation of an electric mobile device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention. [Figure 13] FIG. 13 is a diagram illustrating an operation of an electric vehicle device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention. [Figure 14] FIG. 14 is a diagram illustrating an operation of an electric vehicle device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention. [Figure 15] FIG. 15 is a diagram illustrating an operation of an electric vehicle device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The embodiments described in this specification and the configurations shown in the drawings are merely preferred examples of the disclosed invention, and there may be various modified examples that can replace the embodiments and drawings of this specification at the time of filing this application.

[0031] Furthermore, the same reference numbers or characters in the various drawings of this specification indicate parts or components that perform substantially the same functions.

[0032] In addition, the terms used in this specification are used to describe the embodiments and are not intended to limit and / or restrict the present invention. A singular expression includes a plural expression unless the context clearly indicates a different meaning. In this specification, the terms "include" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and do not preclude the presence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0033] Additionally, terms including ordinal numbers such as "first" and "second" are used in this specification to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another. For example, a first component can be named a second component, and similarly, a second component can be named a first component, without departing from the scope of the present invention. The term "and / or" includes a combination of two or more related items or any one of two or more related items.

[0034] In addition, terms such as "unit", "device", "block", "component", "module" and the like may refer to a unit that processes at least one function or operation. For example, the terms may refer to at least one hardware such as a field-programmable gate array (FPGA) / application specific integrated circuit (ASIC), at least one software stored in a memory, or at least one process processed by a processor.

[0035] Furthermore, terms such as "enveloping" and "enveloped" can include not only cases where there is direct contact with the object being enveloped, but also cases where there is another structure interposed between the object and the object while being spaced apart from the object.

[0036] Hereinafter, the embodiments of the present invention will be described in more detail with reference to the drawings. However, the drawings attached to this specification are intended to illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to aid in further understanding of the technical concept of the present invention, and therefore the present invention should not be interpreted as being limited only to the matters depicted in the drawings.

[0037] FIG. 1 is an oblique view of an electric mobile device and a charging station in a wireless charging system according to one embodiment of the present invention, FIG. 2 is a side view of a wireless charging system according to one embodiment of the present invention, FIG. 3 is an enlarged partial view of a wireless charging system according to one embodiment of the present invention, and FIG. 4 is a diagram of an electric mobile device moving to a charging station in a wireless charging system according to one embodiment of the present invention.

[0038] The wireless charging system 1 may include an electric mobility device and a charging station 30 .

[0039] The electric transportation device may refer to a device configured to be movable using electricity as a power source. The electric transportation device may include an electric kickboard 10, an electric car, an electric wheel, an electric bicycle, an electric motorcycle, an electric two-wheeled parallel cart, a robot vacuum cleaner, etc. In the present embodiment, as shown in Figs. 1 to 4, the electric transportation device is an electric kickboard 10 as an example, but is not limited thereto.

[0040] The electric kickboard 10 may include a board body 12 and a steering unit 18 .

[0041] The board body 12 can serve to provide a support surface for a user to ride on. The board body 12 can also be redesigned into a form of a mobile structure to realize a smart mobility function, in which case it can also refer to a body for an electric wheel, an electric bicycle, or an electric motorcycle.

[0042] The board body 12 may also include a footboard portion 16 on which a user places their feet to ride. The board body 12 may be manufactured as a board-type structure for standing on. Alternatively, the board body 12 may be configured as a seat-type structure by further including a seat portion (not shown) on the upper surface of the board body 12. Alternatively, the board body 12 may be configured as a wheel-type structure by further including a sole support portion (not shown) on the side of the wheel. The board body 12 is not limited to a specific structure.

[0043] The board body 12 may include a storage frame 14. The storage frame 14 may extend from the footboard portion 16 and may be configured to allow a post 18b, which will be described later, to rotate.

[0044] The steering unit 18 can perform a steering function by being coupled to the front of the board body 12. The steering unit 18 can include a steering handle 18a to which a brake lever and a gear shift lever are attached, and a post 18b that rotatably supports the steering handle 18a. The steering unit 18 is disposed at the front of the board body 12 and can be configured to change the traveling direction of the board body 12.

[0045] The post 18b of the steering section 18 and the storage frame 14 of the board body 12 may be one component of the extension section 20. That is, the steering handle 18a may be connected to the upper part of the extension section 20, and the footboard section 16 may be connected to the lower part of the extension section 20. In other words, the extension section 20 may include the post 18b and the storage frame 14.

[0046] The electric kickboard 10 may include a front wheel 22 , a rear wheel 23 , a traction motor 24 , and a brake 25 .

[0047] The front wheels 22 are provided at the bottom of the steering unit 18 and can be rotatably supported at the bottom end of the steering handle 18a. The front wheels 22 can be rotated by rotating the steering handle 18a and the post 18b. The steering angle of the front wheels 22 can be adjusted by steering the steering handle 18a.

[0048] The front wheels 22 and rear wheels 23 can be understood as components collectively including tires, wheel frames, bearings, etc.

[0049] The rear wheel 23 is a type of running wheel, is provided at the rear end of the board body 12, and is configured to be driven by a running motor 24. The drive shaft of the running motor 24 coincides with the wheel frame and the wheel rotation axis of the rear wheel 23, and can be configured as a wheel-integrated motor device.

[0050] The traction motor 24 can serve to drive the rear wheels 23. The mounting position of the traction motor 24 is not particularly limited, and a different traction motor 24 can be mounted on the front wheels 22 by design modification. The traction motor 24 can be a general brushless direct current motor (BLDC) or a driving and regenerative braking type electric motor (for example, a motor and generator).

[0051] The brake 25 can also be attached to either one of the front wheels 22 or the rear wheels 23, or to both the front wheels 22 and the rear wheels 23. The brake 25 can be a mechanical brake that uses friction, or an electronic brake. Here, the electronic brake refers to a regenerative braking or power regenerative brake, and can have a configuration in which the inertial force generated when an electric motor (for example, a braking motor separately attached to the traction motor 24 or the front wheels 22) that is driven by torque is in a closed circuit state is used to rotate a rotor attached to the wheels such as the front wheels 22 or the rear wheels 23, and the electric motor is operated as a generator, thereby converting kinetic energy into electrical energy, recovering it, and exerting a braking force.

[0052] This brake 25 can stop the front wheels 22 and rear wheels 23 or slow down the rotational speed of the wheels, and can also be used in conjunction with the control device 200 described later to perform kick and go functions or cruise functions on incline sections.

[0053] The battery 26 may refer to a rechargeable battery pack in which multiple battery cells are connected in parallel. Although the battery 26 is attached to the board body 12 as an example, the present invention is not limited to this. The battery 26 may serve to supply electric power to the driving motor 24 and a control device (not shown). The battery 26 may also be used to operate electrical and electronic components, such as the electrical power of the electric scooter 10.

[0054] The wireless charging system 1 may include a wireless charging device 50. The wireless charging device 50 may be attached to both the electric scooter 10 and the charging station 30. The electric scooter 10 may be configured to receive wireless power via a power receiving device 60 of the wireless charging device 50 and supply it to the battery 26.

[0055] The wireless charging device 50 may include a power receiving device 60 that receives wireless power, and a power transmitting device 80 that transmits wireless power to the power receiving device 60. The power transmitting device 80 may be provided in the charging station 30. That is, the wireless charging device 50 of this embodiment refers to the power transmitting device 80 and the power receiving device 60, and the power transmitting device 80 may be provided in the charging station 30, and the power receiving device 60 may be provided in the electric kickboard 10. The wireless charging device 50 may transmit and receive wireless power by a magnetic induction method, a magnetic resonance method, or an electromagnetic wave method.

[0056] As shown in Figures 2 and 3, the power receiving device 60 and the power transmitting device 80 may be configured so that their opposing surfaces are inclined at a certain angle. Specifically, the extension 20 may be configured so that it is inclined at a certain angle from the ground or the footboard 16, and the opposing surfaces between the power receiving device 60 and the power transmitting device 80 may be configured so that it is inclined at the same angle from the ground or the footboard 16. With this configuration, the power receiving device 60 can slide relative to the power transmitting device 80 during the process of moving the electric kickboard 10 to the charging position 10b. This movement can minimize misalignment due to the difference in height between the two components from the ground.

[0057] The charging station 30 can be configured to allow the electric kickboard 10 to be parked. The electric kickboard 10 can be located at a traveling position 10a (see FIGS. 1 and 3) where it is separated from the charging station 30 and can be driven, or at a charging position (see FIG. 2) where it is parked or attached to the charging station 30 and can be charged.

[0058] The charging station 30 may include a station body 32 and a power transmission device 80 .

[0059] The station body 32 can be configured to be able to stationary the electric kickboard 10. The station body 32 can be configured to be fixed to the ground and to keep the electric kickboard 10 in an upright state.

[0060] The station body 32 may include a gripping portion 34 to which the extension portion 20 of the electric scooter 10 is fixed. The gripping portion 34 may be configured to accommodate the post 18b of the extension portion 20 or the storage frame 14. Although the case of gripping the post 18b of the extension portion 20 has been described as an example in FIGS. 2 and 3, the present invention is not limited to this.

[0061] The station body 32 may include a first guide portion 36 .

[0062] The first guide portion 36 may be configured to guide the front wheel 22 of the electric kickboard 10. That is, the first guide portion 36 may guide the electric kickboard 10 to a set position by guiding the front wheel 22 in the left-right direction as the electric kickboard 10 moves to the station body 32 for charging. The first guide portion 36 may be configured to narrow in width along the movement direction so as to guide the electric kickboard 10 moving from the traveling position 10a to the charging position 10b. However, the shape of the first guide portion 36 is not limited, and may be any configuration that guides the movement of the electric kickboard 10 as the electric kickboard 10 moves to the charging position 10b.

[0063] The power transmitting device 80 can be configured to wirelessly transmit power to the power receiving device 60. The power transmitting device 80 can be configured to wirelessly transmit an external power source supplied from an outside source. The power receiving device 60 of the electric kickboard 10 can be configured to receive wireless power transmitted from the power transmitting device 80 and charge the battery 26. That is, the power transmitting device 80 generates a magnetic field using an external power source, and the power receiving device 60 generates an induced electromotive force by the generated magnetic field, thereby supplying power to the battery 26.

[0064] The power transmitting device 80 may form an accommodation space 84a (see FIG. 1) capable of accommodating the power receiving device 60. The electric scooter 10 is placed in the charging station 30, and in the process, the power receiving device 60 may be disposed or inserted in the accommodation space 84a. As a result, the electric scooter 10 may be placed in the charging station 30 and simultaneously become ready for charging.

[0065] FIG. 5 is an enlarged view of a power receiving device in an electric mobile device of a wireless charging system according to an embodiment of the present invention.

[0066] The power receiving device 60 may be disposed on the extension 20 of the electric scooter 10. The power receiving device 60 may be disposed on at least one of the post 18b of the extension 20 and the storage frame 14. FIG. 5 and other figures show a case where the power receiving device 60 is disposed on the storage frame 14, but this is not limiting and the power receiving device 60 may be disposed on the post 18b.

[0067] The power receiving device 60 can be formed into a shape corresponding to the shape of the extension part 20, and can be configured to cover at least a part of the outer surface of the extension part 20. This allows the power receiving device 60 to stably support the electric kickboard 10.

[0068] In other words, the power receiving device 60 can be configured to wrap at least a part of the outer surface of the electric kickboard 10. Since at least a part of the first magnetic part 66 described later is configured to be curved, the power receiving device 60 housing the first magnetic part 66 can be configured to have a curved shape as a whole. That is, while there was a limit to changing the shape of the magnetic part in the past, the magnetic part made of a material such as that of the present invention makes it possible to change the shape, and the power receiving device 60 can be designed to correspond to the shape of the mounting surface 20a on which it is mounted. Furthermore, the shape of the power receiving device 60 can also be designed to correspond to the mounting surface 20a. As a result, the power receiving device 60 can be stably mounted on the extension part 20 even if at least a part of the extension part 20 is formed as a curved surface.

[0069] With the above-mentioned configuration, the space or gap between the power receiving device 60 and the extension 20 of the electric kickboard 10 can be omitted, so air resistance can be minimized. In addition, it is possible to prevent the connection part between the power receiving device 60 and the extension 20 from being exposed to the outside due to the space or gap, and the connection part from being damaged. In addition, the center of gravity of the power receiving device 60 can be further aligned with the extension 20 of the electric kickboard 10, allowing the electric kickboard 10 to travel stably.

[0070] FIG. 6 is an exploded perspective view of a power receiving device of a wireless charging system according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line AA' in FIG.

[0071] The power receiving device 60 may include a first housing 62, a first magnetic portion 66, and a first coil portion 68. The first coil portion 68 may be a receiving coil portion.

[0072] The first housing 62 may be configured to accommodate the first magnetic part 66 and the first coil part 68. The first housing 62 may include a housing body 63 having an opening 63a on one side, and a cover 64 for opening and closing the opening 63a. The first magnetic part 66 and the first coil part 68 may be accommodated in an internal space 63aa of the housing body 63 through the opening 63a, and the opening 63a may be sealed by the cover 64.

[0073] The first housing 62 can be configured to house the first magnetic portion 66 and the first coil portion 68 and to protect the first magnetic portion 66 and the first coil portion 68. The first housing 62 can be configured so that at least a portion thereof forms a curved surface, and can be configured to have a curved shape as a whole.

[0074] The rear surface of the first housing 62 may be configured to surround at least a portion of the periphery of the extension 20. The first housing 62 may include a concave coupling surface 63b that forms a coupling space 63bb in which the post 18b of the extension 20 or the receiving frame 14 is mounted. The coupling surface 63b may correspond to the mounting surface 20a of the extension 20. The coupling surface 63b may be defined as a curved surface or a curved portion because it is curved to correspond to the mounting surface 20a of the extension 20. In the drawings of this embodiment, the mounting surface 20a is configured on the receiving frame 14, and the coupling surface 63b corresponds to such mounting surface 20a as an example, but is not limited thereto, and the mounting surface 20a may be formed on the post 18b. Since the outer surfaces of the post 18b of the extension 20 and the receiving frame 14 include at least a portion of a curved surface, the coupling surface 63b may be configured to include a curved surface corresponding thereto. That is, the coupling surface 63 b can be configured to allow the power receiving device 60 to be closely attached to the post 18 b of the extension 20 or the receiving frame 14 .

[0075] The front surface of the first housing 62 can be configured to include a curved surface. That is, the surface 62a of the first housing 62 exposed to the outside can be formed into at least a portion of a curved shape. This allows the power receiving device 60 to disperse external shocks and improve the durability of the first housing 62 itself and the first magnetic unit 66 and first coil unit 68 disposed therein. In addition, as described below, the first magnetic unit 66, at least a portion of which forms a curved surface, can be stably accommodated.

[0076] The first magnetic part 66 can be accommodated inside the first housing 62. The first magnetic part 66 can be configured to be surrounded by the power receiving device 60 in the electric kickboard 10 and to correspond to a mounting surface 20a (see FIG. 6 ) on which the power receiving device 60 is mounted. The first magnetic part 66 and a second magnetic part 86, which will be described later, can perform a shielding function for the coil parts 68, 88.

[0077] The first magnetic part 66 may include a first magnetic body 66a formed to be at least partially curved. The first magnetic body 66a may be formed to be partially curved, or may be formed to be entirely curved as shown in Figures 6 and 7. Due to the curved shape of the first magnetic body 66a, the overall shape of the power receiving device 60 can be formed to be curved, and the power receiving device 60 can be stably attached to the extension part 20 of the electric scooter 10, which includes a curved surface.

[0078] In addition, since at least a portion of the first magnetic body 66a is formed with a curved surface, the area of ​​the first coil fixing surface 66aa on which the first coil portion 68 is disposed can be configured to be larger than the length in the width direction. This allows the charging time to be significantly reduced.

[0079] The first magnetic part 66 may include a first coil guide part 66b protruding from the first magnetic body 66a. The first coil guide part 66b may be formed long along the longitudinal direction of the first magnetic body 66a. The first coil guide part 66b protrudes from a first coil fixing surface 66aa forming a convex front surface of the first magnetic body 66a, thereby guiding a magnetic flux generated by the first coil part 68 arranged on the first coil fixing surface 66aa.

[0080] The first coil portion 68 can be disposed on the first coil fixing surface 66aa of the first magnetic portion 66. Specifically, the first coil portion 68 can be disposed on the convex first coil fixing surface 66aa of the first magnetic body 66a. The first coil portion 68 is wound around the periphery of the first coil guide portion 66b, and therefore can be stably supported on the first coil fixing surface 66aa. Since the first coil fixing surface 66aa of the first magnetic body 66a is formed as a curved surface, the first coil portion 68 can be disposed by forming a curved surface.

[0081] The first coil unit 68 can be electrically connected to a control unit (not shown). The first coil unit 68 can also be electrically connected to the battery 26 via the control unit (not shown).

[0082] The power receiving device 60 may include a fixing jig 69. The fixing jig 69 may be arranged inside the first housing 62 and configured to support the first magnetic part 66. That is, the fixing jig 69 may support the first magnetic part 66 so that the first magnetic part 66 arranged inside the first housing 62 is fixed. The fixing jig 69 may be configured to be removable from the first housing 62, or may be formed integrally with the first housing 62 as one component of the first housing 62. However, the present invention is not limited thereto, and the fixing jig 69 may be omitted and the first magnetic part 66 may be configured to be supported by the inner surface of the first housing 62.

[0083] The power receiving device 60 may include a shock absorbing member 70. The shock absorbing member 70 may be configured to protrude at a certain height in front of the first housing 62. The shock absorbing member 70 may prevent the power receiving device 60 and the power transmitting device 80 from being damaged due to an impact caused by contact between the power receiving device 60 and the power transmitting device 80 when the electric scooter 10 is placed on the charging station 30.

[0084] In addition, the shock absorbing member 70 can be configured to maintain a set distance between the first coil unit 68 and the second coil unit 88 of the power transmitting device 80 described later when the electric kickboard 10 is located at the charging position 10b. That is, when the electric kickboard 10 is located at the charging position 10b, the shock absorbing member 70 can be configured to maintain a constant distance between the first coil unit 68 and the second coil unit 88 depending on the protruding height of the shock absorbing member 70. If the first and second coil units 68, 88 are spaced apart from each other at a constant distance, charging efficiency can be maximized. The constant distance may be preferably about 1 cm or more and about 2 cm or less. In this way, the shock absorbing member 70 can be formed to protrude from the first housing 62 in order to space the coil units 68, 88 apart at a constant distance.

[0085] Furthermore, the shock absorbing member 70 can be configured to align the positions when the power receiving device 60 and the power transmitting device 80 are connected. The power transmitting device 80 includes a fixing groove 84b, which will be described later, and the shock absorbing member 70 is fixed in the fixing groove 84b of the power transmitting device 80, so that the first coil portion 68 of the power receiving device 60 can be stably aligned with the second coil portion 88 of the power transmitting device 80.

[0086] Figure 8 is an enlarged view of a power transmission device in a charging station of a wireless charging system according to one embodiment of the present invention, Figure 9 is an exploded oblique view of a power transmission device in a charging station of a wireless charging system according to one embodiment of the present invention, and Figure 10 is a cross-sectional view along B-B' in Figure 8.

[0087] The charging station 30 may include a power transmission device 80 .

[0088] The power transmitting device 80 can be supported by the station body 32. The power transmitting device 80 can be disposed on the station body 32 so as to have a position corresponding to the position of the power receiving device 60 of the electric scooter 10.

[0089] The power transmitter 80 may include a second housing 82, a second magnetic portion 86, and a second coil portion 88. The second coil portion 88 may be a transmitting coil portion.

[0090] The second housing 82 may be configured to accommodate the second magnetic part 86 and the second coil part 88. The second housing 82 may include a housing body 83 having an opening 83a on one side, and a cover 84 for opening and closing the opening 83a. The second magnetic part 86 and the second coil part 88 may be accommodated in an internal space 83aa of the housing body 83 through the opening 83a, and the opening 83a may be sealed by the cover 84.

[0091] The second housing 82 can be configured to accommodate the second magnetic portion 86 and the second coil portion 88 and to protect the second magnetic portion 86 and the second coil portion 88. The second housing 82 can be configured to have a curved shape as a whole. Specifically, the second housing 82 can be configured so that at least a portion thereof forms a curved surface.

[0092] At least a portion of the front surface of the second housing 82 may be curved. That is, the surface of the second housing 82 facing the power receiving device 60 may be formed to have at least a portion of a curved shape. As a result, an accommodation space 84a for accommodating the power receiving device 60 may be formed in the front of the second housing 82, and the power receiving device 60 may be inserted or accommodated in the accommodation space 84a.

[0093] The second housing 82 may include a fixing groove 84b. The shock absorbing member 70 of the power receiving device 60 may be fixed in the fixing groove 84b. By fixing the shock absorbing member 70 in the fixing groove 84b of the power transmitting device 80, the first coil unit 68 of the power receiving device 60 may be stably aligned with the second coil unit 88 of the power transmitting device 80. The fixing groove 84b may be disposed on the front surface of the second housing 82 and formed in a concave shape to correspond to the shock absorbing member 70.

[0094] The second magnetic portion 86 may be accommodated inside the second housing 82. The second magnetic member 86 may be configured to correspond to the first magnetic portion 66.

[0095] The second magnetic part 86 may include a second magnetic body 86a formed with at least a portion curved. The second magnetic body 86a may be formed with a portion curved, or may be formed with the entirety curved as shown in Figures 9 and 10. Due to the curved shape of the second magnetic body 86a, the overall shape of the power transmitting device 80 can be configured to be curved, and the power receiving device 60 including the curved surface can be stably fixed.

[0096] In addition, by forming at least a part of the second magnetic body 86a with a curved surface, the area of ​​the second coil fixing surface 86aa on which the second coil portion 88 is arranged can be configured to be larger than the length in the width direction. This makes it possible to significantly shorten the charging time.

[0097] The second magnetic part 86 may include a second coil guide part 86b protruding from the second magnetic body 86a. The second coil guide part 86b may be formed long along the longitudinal direction of the second magnetic body 86a. The second coil guide part 86b protrudes from the concave second coil fixing surface 86aa of the second magnetic body 86a, thereby guiding the magnetic flux generated by the second coil part 88 arranged on the second coil fixing surface 86aa.

[0098] The second coil portion 88 can be disposed on the second coil fixing surface 86aa of the second magnetic portion 86. Specifically, the second coil portion 88 can be disposed on the concave second coil fixing surface 86aa of the second magnetic body 86a. The second coil portion 88 is wound around the periphery of the second coil guide portion 86b, and therefore can be stably supported on the second coil fixing surface 86aa. Since the second coil fixing surface 86aa of the second magnetic body 86a is formed as a curved surface, the second coil portion 88 can be disposed by forming a curved surface. The second coil portion 88 can be electrically connected to an external power source. The second coil portion 88 can transmit wireless power to the first coil portion 68.

[0099] The first coil portion 68 and the second coil portion 88 may include conductive wire. The conductive wire may include a conductive material. For example, the conductive wire may include a conductive metal. Specifically, the conductive wire may include one or more metals selected from the group consisting of copper, nickel, gold, silver, zinc, and tin.

[0100] The conductive wire may be a Litz wire made of a number of fine wires twisted together and covered. For example, the Litz wire may be made of 10 or more, 100 or more, or 500 or more fine wires, and more specifically, may be made of 500 to 1500 fine wires.

[0101] The conductive wire may also be covered with an insulating jacket. For example, the insulating jacket may include an insulating polymer resin. Specifically, the insulating jacket may include polyvinyl chloride (PVC) resin, polyethylene (PE) resin, Teflon resin, silicone resin, polyurethane resin, etc.

[0102] The conductive wire may be wound in the form of a planar coil. Specifically, the planar coil may include a planar spiral coil. The planar shape of the coil may be, but is not limited to, a circle, an ellipse, a polygon, or a polygon with rounded corners.

[0103] The coil portion may have an open shape in plan view, and may thus have an outer dimension (Od) and an inner dimension (Id). For example, the outer dimension and the inner dimension may refer to the outer diameter and the inner diameter when the coil portion is a circular donut shape in plan view, or the length of the sides of the outer rectangular shape and the length of the sides of the open rectangular area in the inner area when the coil portion is a rectangular donut shape in plan view.

[0104] Specifically, the outer dimension (Od) of the coil portion may be 50 mm to 1000 mm, 100 mm to 500 mm, 100 mm to 300 mm, 200 mm to 800 mm, 300 mm to 400 mm, or 500 mm to 1000 mm, and the inner dimension (Id) of the coil portion may be 5 mm to 300 mm, 10 mm to 200 mm, 150 mm to 250 mm, or 20 mm to 150 mm.

[0105] In the planar coil, the number of turns of the conductive wire may be 5 to 50, 10 to 30, 5 to 30, 15 to 50, or 20 to 50.

[0106] As a specific example, the coil portion may be a planar spiral coil formed by winding the conductive wire 5 to 15 times, and may have an outer dimension of 50 mm to 200 mm and an inner dimension of 10 mm to 150 mm.

[0107] Within the above-mentioned preferred range of planar coil dimensions and specifications, the coil can be suitably applied to fields requiring large-capacity power transmission, such as electric vehicles.

[0108] The diameter (C) of the conductive wire constituting the coil portion can also be adjusted within a certain range. For example, the diameter of the conductive wire may be 0.1 mm or more, 0.5 mm or more, 1 mm or more, 2 mm or more, or 3 mm or more. The diameter of the conductive wire may be 10 mm or less, 8 mm or less, 7 mm or less, 6 mm or less, or 5 mm or less. More specifically, the diameter of the conductive wire may be 0.5 mm to 3 mm.

[0109] The inductance of the coil portion may be 30 μH or more, 50 μH or more, 70 μH or more, or 90 μH or more, or 150 μH or less, 100 μH or less, 80 μH or less, or 60 μH or less, specifically 30 μH to 60 μH, or 70 μH to 150 μH, but is not limited to these.

[0110] The first magnetic portion 66 and the second magnetic portion 86 may include a polymeric magnetic portion including a binder resin and a filler. Specifically, the magnetic portion may include a polymeric magnetic portion including the binder resin and a filler dispersed in the binder resin. The polymeric magnetic portion may include a polymeric magnetic block (PMB).

[0111] In the polymer-type magnetic portion, the fillers are bound together by the binder resin, so that defects are reduced overall over a wide area, and damage caused by impact is reduced.

[0112] The filler may be an oxide filler such as ferrite (Ni-Zn, Mg-Zn, Mn-Zn ferrite, etc.), a metal filler such as permalloy, sendust, nanocrystalline magnetic material, or a mixed powder thereof. More specifically, the filler may be sendust particles having an Fe-Si-Al alloy composition.

[0113] For example, the filler may have the composition of Formula 1 below.

[0114] [Chemical formula 1] Fe1-abc Sia Xb Yc

[0115] In the above formula, X is Al, Cr, Ni, Cu, or a combination thereof, and Y is Mn, B, Co, Mo, or a combination thereof, and 0.01≦a≦0.2, 0.01≦b≦0.1, and 0≦c≦0.05. Specifically, in the above formula, X may be Al, Cr, or a combination thereof.

[0116] The filler may include sand dust.

[0117] The average particle size (D50) of the filler may be in the range of about 1 μm to 300 μm, about 10 μm to 200 μm, or about 30 μm to 150 μm. When the average particle size of the filler satisfies the above range, the amount of position change at temperatures of 150 to 180° C. can be minimized, further improving the heat resistance and magnetic properties of the magnetic part, thereby improving the filling efficiency.

[0118] The filler may be included in an amount of 60% by weight or more, 70% by weight or more, or 85% by weight or more based on the total weight of the polymer-type magnetic part.

[0119] For example, the polymer type magnetic part may contain the filler in an amount of 60% to 90% by weight, 70% to 90% by weight, 75% to 90% by weight, 78% to 90% by weight, 80% to 90% by weight, 85% to 90% by weight, 87% to 90% by weight, or 89% to 90% by weight. If the content of the filler is less than 60% by weight, the positional change amount of the polymer type magnetic part increases, the heat resistance of the magnetic part decreases, and deformation and breakage of the magnetic part at high temperatures may occur. This may result in a decrease in magnetic properties and a decrease in charging efficiency.

[0120] The melting point (Tm) of the binder resin may be 150 to 210° C. For example, the melting point (Tm) of the binder resin may be 160 to 200° C., for example, 160 to 180° C. When the melting point (Tm) of the binder resin satisfies the above range, the amount of position change at temperatures of 150 to 180° C. can be minimized, and the heat resistance and magnetic properties of the magnetic part can be further improved, thereby improving the filling efficiency.

[0121] The binder resin may include one or more selected from the group consisting of polyimide resin, polyamide resin, polyamideimide resin, polycarbonate resin, acrylonitrile-butadiene-styrene (ABS) resin, polypropylene resin, polyethylene resin, polystyrene resin, polyphenylsulfide (PSS) resin, polyetheretherketone (PEEK) resin, silicone resin, acrylic resin, polyurethane resin, polyester resin, isocyanate resin, and epoxy resin.

[0122] The binder resin may be a curable resin. Specifically, the binder resin may be a photocurable resin and / or a thermosetting resin, and in particular, may be a resin that can be cured to exhibit adhesiveness. More specifically, the binder resin may be a resin that includes one or more functional groups or sites that can be cured by heat, such as a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group, or an amide group, or that includes one or more functional groups or sites that can be cured by active energy, such as an epoxide group, a cyclic ether group, a sulfide group, an acetal group, or a lactone group. Such functional groups or sites may be, for example, an isocyanate group (-NCO), a hydroxyl group (-OH), or a carboxyl group (-COOH).

[0123] Specifically, the binder resin may include one or more resins selected from the group consisting of polyamide resins, polycarbonate resins, and polypropylene resins.

[0124] Even if a resin having excellent heat resistance is used as the binder resin, if the mixture with the filler is not good, the amount of positional change may increase at a temperature of 150 to 180° C. Therefore, it is important to select the binder resin so that the mixture with the filler is good.

[0125] For example, the binder resin may be a polyamide resin, and the filler may be sendust.

[0126] The polymer magnetic part may contain the binder resin in an amount of 5% by weight to 40% by weight, 10% by weight to 40% by weight, 10% by weight to 20% by weight, 5% by weight to 20% by weight, 5% by weight to 15% by weight, or 7% by weight to 15% by weight.

[0127] According to one embodiment, in order to control the amount of position change of the polymer magnetic part at a temperature of 150 to 180°C to 20% or less, the binder resin can be contained in an amount of 10% to 40% by weight, and the filler can be contained in an amount of 60% to 90% by weight.

[0128] According to one embodiment, in order to control the amount of positional change of the polymer-type magnetic part to 3% or less at a temperature of 150 to 180°C, the binder resin can be contained in an amount of 10% to 20% by weight, and the filler can be contained in an amount of 80% to 90% by weight.

[0129] The polymer magnetic part may further include an additive. Specifically, the polymer magnetic part may further include one or more insulating coating agents selected from the group consisting of phosphoric acid and silane. The additive may be added in an amount of 0.1 to 10% by weight based on the total weight of the polymer magnetic part. Specifically, the insulating coating agent may be added in an amount of 0.1 to 10% by weight based on the total weight of the polymer magnetic part.

[0130] When the additive is contained in the above range, it is advantageous for reducing the amount of positional change at temperatures of 150 to 180° C., and the packing efficiency can be improved.

[0131] The magnetic permeability of the polymer magnetic part in the frequency band of 79 kHz to 90 kHz may vary depending on the material, and may be broadly 5 to 150,000, or may be 5 to 300, 500 to 3,500, or 10,000 to 150,000 depending on the specific material.

[0132] The magnetic permeability loss of the polymer magnetic part in the frequency band of 79 kHz to 90 kHz may vary depending on the material and may be broadly 0 to 50,000, or may be 0 to 1,000, 1 to 100, 100 to 1,000, or 5,000 to 50,000 depending on the specific material.

[0133] As a specific example, when the magnetic part is a polymer type magnetic part containing magnetic powder and binder resin, specifically a polymer type magnetic block, the magnetic permeability in a frequency band of 79 kHz to 90 kHz, specifically 85 kHz, may be 5 to 500, 5 to 130, 15 to 80, or 10 to 50, and the magnetic permeability loss may be 0 to 50, 0 to 20, 0 to 15, or 0 to 5.

[0134] The polymer type magnetic part can be stretched at a certain rate. For example, the stretch rate of the polymer type magnetic part may be 0.5% or more. The stretch property is difficult to obtain in a ceramic magnetic part not using a polymer, and even if a large-area magnetic part is warped due to an impact, damage can be reduced. Specifically, the stretch rate of the polymer type magnetic part may be 0.5% or more, 1% or more, or 2.5% or more. There is no particular upper limit to the stretch rate, but if the content of the polymer resin is increased to improve the stretch rate, the physical properties of the magnetic part, such as the inductance, may decrease, so the stretch rate is preferably 10% or less.

[0135] The first magnetic portion 66 and the second magnetic portion 86 contain magnetic powder and polymer resin, and therefore can be easily manufactured into a curved shape. For example, the first magnetic portion 66 and the second magnetic portion 86 can be manufactured into a curved shape by an injection process.

[0136] In addition, each of the power transmitting device 80 and the power receiving device 60 may include an antenna for communication. For example, the power receiving device 60 may include an NFC antenna or the like and may communicate with the power transmitting device 80. That is, the power transmitting device 80 and the power receiving device 60 may transmit and receive information to and from each other.

[0137] Next, a charging process of the wireless charging system for the electric vehicle will be described with reference to the drawings described above.

[0138] A user can park the electric kickboard 10 on the charging station 30. At this time, the power receiving device 60 is aligned with the power transmitting device 80, and the electric kickboard 10 can be positioned at the charging position 10b. During this process, the front wheel 22 of the electric kickboard 10 is guided by the first guide portion 36 of the charging station 30, and the extension portion 20 of the electric kickboard 10 can be maintained in a parked state by the grip portion 34 of the charging station 30.

[0139] When the electric kickboard 10 is placed on the charging station 30 and the power receiving device 60 is in a state in which it can be charged by the power transmitting device 80, wireless power can be supplied to the power receiving device 60 via the power transmitting device 80. An AC voltage having a predetermined frequency is applied from the outside to the second coil unit 88, and wireless power is transmitted from the second coil unit 88 to the first coil unit 68. The battery 26 can be charged by the wireless power transmitted to the first coil unit 68.

[0140] When the electric kickboard 10 is placed on the charging station 30 and the power receiving device 60 is in a state in which charging is possible with respect to the power transmitting device 80, the control unit (not shown) can output the fact that the electric kickboard 10 is in a state in which charging is possible via an output device. The output device can include a speaker, an LED, a display device, etc. The control unit can also output an alarm sound or a beep sound via the speaker, and can indicate that the electric kickboard 10 is in a state in which charging is possible by changing the LED from an OFF state to an ON state or by changing the color of the LED. The control unit can also output the fact that the electric kickboard 10 is in a state in which charging is possible via a separate display device.

[0141] Next, a wireless charging system for an electric mobile device according to another embodiment of the present invention will be described.

[0142] 11a and 11b are diagrams illustrating an operation of an electric mobile device being settled in a charging station in a wireless charging system according to another embodiment of the present invention.

[0143] The power receiving device 60 may be disposed on the extension 20 of the electric scooter 10. The power receiving device 60 may be disposed on at least one of the post 18b of the extension 20 and the storage frame 14.

[0144] The station body 132 of the charging station 130 may include a grip portion 134 .

[0145] The gripping portion 134 can be configured to accommodate both the extension 20 of the electric kickboard 10 and the power receiving device 60. The gripping portion 134 is configured to be concave so that the electric kickboard 10 can be placed thereon, and can form a gripping space 134a that accommodates the extension 20 of the electric kickboard 10 and the power receiving device 60. In other words, the gripping portion 134 can be configured to be concave with respect to the opposing surface 132a facing the electric kickboard 10 so as to form the gripping space 134a in which the extension 20 of the electric kickboard 10 is fixed in the station main body 232.

[0146] In the embodiment of Figures 1 to 3 described above, it was explained that the gripping portion 34 and the power transmitting device 80 arranged on the charging station 30 are arranged spaced apart from each other above and below, and the portion on the extension portion 20 held by the gripping portion 34 and the power receiving device 60 are arranged spaced apart from each other.

[0147] In this embodiment, the gripping portion 134 of the charging station 130 can accommodate both the power receiving device 60 and the extension portion 20, and can simultaneously accommodate the power receiving device 60 in a chargeable state and operate the same. This allows the user to intuitively know, while placing the electric kickboard 10 on the charging station 130, whether the power receiving device 60 of the electric kickboard 10 is in a chargeable state and is aligned in a preferred position.

[0148] The power transmitting device 80 can be disposed inside the gripping portion 134. The power transmitting device 80 can be configured to be disposed on the gripping portion 134 and to form a gripping space 134a together with the gripping portion 134. That is, the power transmitting device 80 can be configured to be exposed to the gripping space 134a. In this embodiment, the power transmitting device 80 may be a part of the gripping portion 134. The shock absorbing member 70 of the power receiving device 60 can be fixed in the fixing groove 84b of the power transmitting device 80. For this purpose, the fixing groove 84b can be configured to be exposed toward the gripping space 134a.

[0149] With this configuration, the power receiving device 60 can be accommodated in the gripping space 134a of the grip part 134, and can be placed in a chargeable state in which it receives wireless power from the power transmitting device 80 in conjunction with the accommodation.

[0150] The charging station 30 may include a mounting guide 140. The mounting guide 140 may be disposed on the gripping space 134a. The mounting guide 140 may be configured to move elastically relative to the gripping portion 134.

[0151] The mounting guide 140 can be configured to be pressed by the power receiving device 60 or the extension 20 and inserted into the gripping portion 134 or to return elastically. That is, the mounting guide 140 can move between a first position 140a protruding from the gripping portion 134 and a second position 140b pressed by the power receiving device 60 or the extension 20 and inserted further inward into the gripping portion 134 than the first position 140a. In addition, the mounting guide 140 can return elastically to a third position 140c supporting the back surface of the power receiving device 60 or the extension 20 after the power receiving device 60 and the extension 20 are inserted into the gripping space 134a. The mounting guide 140 can support the electric kickboard 10 placed on the charging station 30 at the third position 140c.

[0152] The mounting guide 140 may be formed in a shape corresponding to the outer surfaces of the power receiving device 60 and the extension part 20. The mounting guide 140 may include first to third guide surfaces 141a, 141b, and 141c.

[0153] The first guide surface 141a may be formed with an inclination so as to be pressed by the power receiving device 60 in the process of moving the mounting guide 140 from the first position 140a to the second position 140b by the electric kickboard 10. The second guide surface 141b may be formed with an inclination so as to be pressed by the extension part 20 in the process of moving the mounting guide 140 from the third position 140c to the first position 140a when removing the electric kickboard 10 from the charging station 130. The third guide surface 141c may be configured to support at least a part of the extension part 20 when the electric kickboard 10 is placed on the charging station 130. For convenience of explanation, the guide surfaces are described separately, but the mounting guide 140 may be configured to guide or support the electric kickboard 10 in conjunction with the placement of the electric kickboard 10.

[0154] Next, the operation of the charging system having the electric vehicle device with the above configuration will be described.

[0155] 11a, the electric scooter 10 can be moved to the charging station 130 to be parked thereon. Before being inserted into the gripping portion 134, the mounting guide 140 can be positioned at a first position 140a.

[0156] During the process of inserting the extension portion 20 of the electric kickboard 10 and the power receiving device 60 into the grip portion 134, the first guide surface 141a of the mounting guide 140 is pressed by the power receiving device 60, and the mounting guide 140 can move from the first position 140a to the second position 140b.

[0157] When the extension 20 of the electric kickboard 10 and the power receiving device 60 are inserted into the grip 134 so that the power receiving device 60 is in a state in which it can be charged with the power transmitting device 80, the mounting guide 140 can elastically return from the second position 140b to the third position 140c. At the third position 140c, the mounting guide 140 can support the extension 20 by the third guide surface 141c as shown in FIG. 11b. The second guide surface 141b can also support the power receiving device 60.

[0158] When the electric scooter 10 is removed from the charging station 130, the second guide surface 141b of the mounting guide 140 is pressed by the power receiving device 60, and the mounting guide 140 can move from the third position 140c to the second position 140b. When the extension part 20 of the electric scooter 10 and the power receiving device 60 are released from the grip part 134, the mounting guide 140 can elastically return from the second position 140b to the first position 140a.

[0159] The control unit (not shown) can also detect the placement state of the electric kickboard 10 by the mounting guide 140, and can selectively restrain the electric kickboard 10 to the charging station 130.

[0160] In other words, the control unit can detect the sequential movement of the attachment guide 140 from the first position 140a to the third position 140c to determine whether the electric kickboard 10 has been fixed to the gripping portion 134, and can also detect that a type of electric kickboard other than the electric kickboard 10 compatible with the charging station 130 has been attached.

[0161] In addition, the control unit can also prevent the electric kickboard 10 from being arbitrarily detached from the charging station 130 due to an external force by restraining the mounting guide 140 at the third position 140c.

[0162] With the above-mentioned configuration, the electric kickboard 10 can be parked and charged at the same time, eliminating the need to move the electric kickboard 10 separately to align the power transmitting device 80 and the power receiving device 60. This also makes it possible to intuitively charge and park the electric kickboard 10.

[0163] Next, a wireless charging system for an electric vehicle according to still another embodiment of the present invention will be described.

[0164] 12a and 12b are diagrams illustrating an operation of an electric mobile device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention.

[0165] The power receiving device 60 can be disposed on the extension part 20 of the electric kickboard 10. In this embodiment, the power receiving device 60 can be disposed on the post 18b of the extension part 20. The post 18b is one component of the steering part 18 and is configured to be rotatable by steering, so the power receiving device 60 can be configured to face in different directions depending on the rotation of the post 18b.

[0166] The station body 232 of the charging station 230 may include a grip portion 234 .

[0167] The gripping portion 234 can be configured to accommodate both the extension 20 of the electric kickboard 10 and the power receiving device 60. The gripping portion 234 is configured to be concave so that the electric kickboard 10 can be placed thereon, and can form a gripping space 234a that accommodates the extension 20 of the electric kickboard 10 and the power receiving device 60. In other words, the gripping portion 234 can be configured to be concave with respect to the opposing surface 232a facing the electric kickboard 10 so as to form the gripping space 234a in which the extension 20 of the electric kickboard 10 is fixed in the station main body 132.

[0168] Since the power receiving device 60 is attached to the post 18b that is configured to be rotatable for steering, the facing direction can be changed even when the electric kickboard 10 is stationary. In this embodiment, when the power receiving device 60 is placed in the gripping space 234a, charging is possible regardless of the facing direction of the first coil portion 68 of the power receiving device 60.

[0169] The power transmission device 280 may include a plurality of second coil portions 288. The plurality of second coil portions 288 may be arranged side by side toward the gripping space 234a. That is, the plurality of second coil portions 288 may be arranged along the inner circumference of the gripping portion 234. Even when the electric kickboard 10 is placed in the charging station 230, the post 18b may be configured to be rotatable together with the steering handle 18a.

[0170] The charging station 230 can activate, for wireless charging, the second coil section 288 that faces the first coil section 68 of the power receiving device 60 among the multiple second coil sections 288. In other words, even if the power receiving device 60 of the electric kickboard 10 is not necessarily placed so as to face the front, as shown in Fig. 12b, wireless power can be transmitted to the first coil section 68 of the power receiving device 60 via the second coil section 288 that faces the first coil section 68 among the multiple second coil sections 288.

[0171] In this embodiment, the power transmitting device 80 includes one second housing 282, a plurality of second coil portions 288 arranged inside the second housing 282, and a plurality of second magnetic portions 286, but is not limited thereto. As an example, a plurality of power transmitting devices 280 may be provided and arranged so as to have the second housing 282, the second coil portion 288, and the second magnetic portion 286, respectively. The power transmitting device 280 may also be configured so that the plurality of second coil portions 288 are arranged on one second magnetic portion 286. The shape and number of the power transmitting device 80 are not limited, and it is sufficient that the plurality of second coil portions 288 are selectively matched with the first coil portion 68.

[0172] With this configuration, when the electric kickboard 10 is placed on the charging station 230, no additional operation is required to align the power transmitting device 280 and the power receiving device 60, and the electric kickboard 10 can be charged stably.

[0173] Next, a wireless charging system for an electric vehicle according to still another embodiment of the present invention will be described.

[0174] FIG. 13 is a diagram illustrating an operation of an electric vehicle device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention.

[0175] The station main body 32 may include a moving guide unit 342. The above-mentioned first guide unit 36 ​​may be configured to guide the electric kickboard 10 in the left-right direction, and the moving guide unit 342 may be configured to guide the electric kickboard 10 in the front-rear direction. The moving guide unit 342 may be defined as a second guide unit. The guide unit may mean at least one of the first guide unit 36 ​​and the moving guide unit 342. In other words, the guide unit may mean at least one of the first guide unit 36 ​​and the second guide unit. The guide unit may guide the electric kickboard 10 along the moving direction in which the electric kickboard 10 moves from the traveling position 10a toward the charging position 10b.

[0176] The movement guide unit 342 can be configured to guide the front wheel 22 of the electric kickboard 10. The movement guide unit 342 can be configured to guide the movement of the electric kickboard 10 to the charging position 10b and to maintain the charging position 10b.

[0177] The movement guide portion 342 may include a first inclined surface 342a and a second inclined surface 342b.

[0178] The first inclined surface 342a may be formed with an incline so that the front wheel 22 rises when the electric kickboard 10 moves to the charging position 10b. In other words, the first inclined surface 342a may be configured to have an inclination that increases toward the front.

[0179] The second inclined surface 342b may be configured to prevent the front wheel 22 from moving backward when the electric kickboard 10 is located at the charging position 10b. That is, the second inclined surface 342b may be configured to have an inclination that decreases toward the front.

[0180] The electric kickboard 10 can be stably moved to and maintained at the charging position 10b by the movement guide portion 342.

[0181] Next, a wireless charging system for an electric vehicle according to still another embodiment of the present invention will be described.

[0182] FIG. 14 is a diagram illustrating an operation of an electric vehicle device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention.

[0183] The station body 32 may include a movement guide portion 442 .

[0184] The movement guide unit 442 can be configured to guide the movement of the electric kickboard 10 to the charging position 10b and to maintain the electric kickboard 10 at the charging position 10b.

[0185] The moving guide unit 442 may be configured to be movable up and down. Specifically, the moving guide unit 442 may be configured to tilt at a certain angle relative to the first guide unit 36. The moving guide unit 442 may operate between a first and a second guide position. The first guide position is a state in which the moving guide unit 442 is placed on the ground, and the electric kickboard 10 may move to the upper part of the moving guide unit 442 at the first guide position during the movement to the charging position 10a. The second guide position may be a position in which the moving guide unit 442 is tilted from the first guide position. When the rear wheel 23 of the electric kickboard 10 is located at the upper part of the moving guide unit 442, the moving guide unit 442 may be configured to tilt to the second guide position so that the electric kickboard 10 as a whole is inclined forward. By such a tilting operation of the moving guide unit 442, the electric kickboard 10 can be stably positioned at the charging position 10b.

[0186] When the electric kickboard 10 is removed from the charging station 30, the moving guide part 442 can be lowered and positioned at the first guide position. By positioning the moving guide part 442 at the first guide position, the electric kickboard 10 can be easily moved backward from the charging station 30.

[0187] The movement guide unit 442 can be operated by a control unit (not shown) based on a detection of the movement of the electric kickboard 10 to the charging position 10b by a separate detection sensor (not shown). The movement guide unit 442 can also be operated by the control unit via a separate switch. The movement guide unit 442 can also be configured to be able to rise and fall by physical operation.

[0188] Next, a wireless charging system for an electric vehicle according to still another embodiment of the present invention will be described.

[0189] FIG. 15 is a diagram illustrating an operation of an electric vehicle device being settled in a charging station in a wireless charging system according to still another embodiment of the present invention.

[0190] The station body 32 may include a movement guide portion 542 .

[0191] The movement guide unit 542 can be configured to guide the front wheel 22 of the electric kickboard 10. The movement guide unit 542 can be configured to guide the movement of the electric kickboard 10 to the charging position 10b and to maintain the charging position 10b.

[0192] The movement guide portion 542 may include an inclined surface 542a and a step portion 542b.

[0193] The inclined surface 542a can be formed with an incline so that the front wheel 22 rises when the electric kickboard 10 moves to the charging position 10b. In other words, the inclined surface 542a can be configured to have an inclination that increases toward the front.

[0194] The step portion 542b can be configured to maintain the position of the front wheel 22 of the electric kickboard 10 when the electric kickboard 10 is located at the charging position 10b. Specifically, the step portion 542b can be configured to prevent the front wheel 22 from moving forward or backward. The step portion 542b is configured to have a step at a certain height from the front end of the inclined surface 542a, so that the front wheel 22 accommodated in the step portion 542b cannot easily come off. This allows the electric kickboard 10 to stably move to and be maintained at the charging position 10b by the movement guide portion 542.

[0195] Although specific embodiments have been described above with reference to the drawings, the present invention is not limited to the above-described embodiments, and those skilled in the art may make various modifications and variations without departing from the spirit and scope of the technical ideas of the present invention as set forth in the following claims.

Claims

1. A footboard portion; an extension including a storage frame extending from the footboard portion and a post rotatably coupled to the storage frame; a steering wheel coupled to the post for controlling direction; a power receiving device encasing at least a portion of an outer surface of the extension; The power receiving device is A receiving coil section; a magnetic section in which the receiving coil section is disposed, The magnetic portion is a coil fixing surface on which the receive coil section is fixed; a coil guide section including a plurality of coil guide members arranged apart from each other and protruding from the coil fixing surface to guide a magnetic flux generated by the receiving coil section; The receiving coil section is wound around the coil guide section.

2. The power receiving device is The electric mobility device of claim 1 , further comprising a curved portion formed to correspond to an outer surface of the extension.

3. The electric transportation device according to claim 2 , wherein the magnetic portion is curved to correspond to the curved portion.

4. The magnetic portion is The electric mobility device according to claim 3 , further comprising a magnetic body having the coil fixing surface, at least a portion of which is curved to correspond to the curved portion.

5. The receive coil section includes: Compatible with the transmitting coil of the charging station, The power receiving device is a housing that accommodates the magnetic portion; a shock absorbing member formed to protrude from the housing so as to face the transmitting coil unit, The impact absorbing member is 2. The electric mobility device of claim 1, wherein the receive coil section and the transmit coil section are spaced apart by a set distance.

6. A charging station including a power transmitting device that transmits wireless power to a power receiving device of an electric vehicle, The power transmitting device is A transmitting coil section; a magnetic section in which the transmitting coil section is arranged, The magnetic portion is a coil fixing surface on which the transmitting coil section is fixed; a coil guide section including a plurality of coil guide members arranged apart from each other and protruding from the coil fixing surface so as to guide a magnetic flux generated by the transmitting coil section; The charging station, wherein the transmitting coil section is wound around the coil guide section.

7. The power transmitting device is A concave accommodation space is formed to accommodate the curved surface of the power receiving device, The magnetic portion is 7. The charging station of claim 6, further comprising a magnetic body formed with a curve to correspond to a curved surface of the power-receiving device.

8. The station body, a gripping portion formed on the station body and defining a gripping space for accommodating the electric moving device; The power transmitting device is The charging station according to claim 6 , configured to be exposed to the holding space so as to transmit wireless power to the power receiving device housed in the holding space.

9. The power transmitting device is A plurality of transmitting coil units are arranged along an inner circumference of the holding portion and are disposed so as to face the holding space, The plurality of transmitting coil sections include The charging station of claim 8 , at least one of which is configured to correspond to a receiving coil portion of the electric mobility device.

10. The electric moving device includes: The vehicle can be located at a travel position where the vehicle can travel and at a charging position where the vehicle is parked at the charging station and receives wireless power from the power transmission device, The charging station includes: a guide portion that guides the electric transportation device along a moving direction from the traveling position toward the charging position, The guide portion is A first guide portion that guides the electric vehicle device in a left-right direction; The charging station according to claim 6 , further comprising a second guide portion that guides the electric transportation device in a front-rear direction.

11. The second guide portion is a first inclined surface formed to be inclined so that the electric moving device rises along the moving direction; 11. The charging station of claim 10, further comprising: a second inclined surface extending from the first inclined surface along the direction of movement and inclined downward along the direction of movement, such that the electric transportation device remains in the charging position.

12. The second guide portion is a first guide position fixed to the ground; 11. The charging station of claim 10, configured to operate between a first guide position and a second guide position at a tilt angle relative to the ground to move the electric mobility device placed on top of the second guide portion to the charging position.

13. The electric moving device includes: Includes front and rear wheels, The second guide portion is an inclined surface formed to be inclined so that the electric moving device rises along the moving direction; The charging station of claim 10, further comprising: a step portion disposed along the direction of movement from the inclined surface and configured to have a step from an end of the inclined surface to accommodate the front wheels.

14. an electric vehicle including a battery and a power receiving device for supplying power to the battery; a charging station including a power transmitting device that transmits wireless power to the power receiving device and is configured so that the electric mobility device can be stationary; The power receiving device is configured to encase at least a portion of an exterior surface of the motorized mobility device; The power receiving device is A receiving coil section; a magnetic section in which the receiving coil section is disposed, The magnetic portion is a coil fixing surface on which the receive coil section is fixed; a coil guide section including a plurality of coil guide members arranged apart from each other and protruding from the coil fixing surface to guide a magnetic flux generated by the receiving coil section; A wireless charging system for an electric mobile device, wherein the receiving coil section is wound around the coil guide section.

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