TWI818435B - Electric vehicle, charging station and wireless charging system for electric vehicle - Google Patents

Abstract

An electric vehicle of the present invention includes a footrest, an extension part which comprises a housing frame extending from the footrest, and a steering tube rotatably coupled to the housing frame, a handlebar coupled to the steering tube to control a driving direction and a power reception apparatus which surrounds at least a portion of an outer surface of the extension part.

Description

Electric vehicles, charging stations and wireless charging systems for electric vehicles

The present invention relates to an electric vehicle, a charging station and a wireless charging system for the electric vehicle, and in particular to an electric vehicle with an improved structure, a charging station and a wireless charging system for the electric vehicle.

Generally speaking, the wireless charging method is a method of charging a battery using electromagnetic induction, and is a method in which a primary coil (transmission coil) is provided in a wireless charger (wireless power transmission device) and the electronic device to be charged (wireless power transmission device) is A method of arranging a secondary coil (receiving coil) in a power receiving device so that the current generated by magnetic induction between the primary coil and the secondary coil is converted into electrical energy to charge the battery.

An electric vehicle may refer to a mobile device configured to use electricity as a power source. As examples, electric vehicles may include electric scooters, electric cars, electric wheels, electric bicycles, electric motorcycles, electric vehicles with two parallel wheels, sweeping robots, and the like. This electric vehicle includes a battery that can be charged and used in a wired method, or the battery can be used by being charged using a wireless charging method as described above.

An electric vehicle using the wireless charging method is provided with a shielding member on its rear surface together with the primary coil and the secondary coil. However, due to structural, functional, and geometric limitations, the shielding member is formed in a planar shape, so there are structural limitations in wireless charging devices and systems. Furthermore, in the case of the wireless charging method, the power transmission device and the power reception device should be disposed at corresponding positions so that the first coil part and the second coil part face each other. However, if these devices are not arranged as described above, there is a problem that charging efficiency is reduced or charging is not performed.

An object of the present invention is to provide a wireless charging system for an electric vehicle with an improved structure.

Furthermore, another object of the present invention is to provide a wireless charging system for electric vehicles with improved charging efficiency.

Furthermore, another object of the present invention is to provide a wireless charging system for electric vehicles with an improved charging structure.

In order to achieve the above object, according to an embodiment of the present invention, an electric vehicle is provided, including: a foot pedal; an extension part including a housing frame extending from the foot pedal and rotatably coupled to the housing a steering tube of the frame; a handlebar coupled to the steering tube to control driving direction; and a power receiving device surrounding at least a portion of an outer surface of the extension member.

The power receiving device may include a curved member formed to be curved to correspond to the outer surface of the extension member.

The power receiving device may include: a receiving coil part; and a magnetic part, the receiving coil part is provided in the magnetic part, wherein the magnetic part is formed to be curved to correspond to the curved part.

The magnetic component may include a magnetic body having a coil seat on which the receiving coil component is seated, wherein at least a portion of the magnetic body is formed to be curved to correspond to the bend.

The magnetic component may include a coil guide component extending from the coil seat surface to guide magnetic flux generated by the receiving coil component.

The receiving coil part may correspond to the transmitting coil part of the charging station, and the power receiving device may include: a housing in which the magnetic part is disposed; and an impact absorbing member protruding from the housing to face the transmitting coil part , wherein the impact absorbing member may be configured such that the receiving coil component and the transmitting coil component are spaced apart from each other by a set distance.

Furthermore, according to another aspect of the present invention, there is provided a charging station including: a power transmission device configured to wirelessly transmit power to a power receiving device of an electric vehicle, wherein the power transmission device is configured to form A concave housing space in which the curved surface of the power receiving device is accommodated.

The power transmission device may include a magnetic component in which the transmission coil component for wirelessly transmitting the power to the power receiving device is disposed, wherein the magnetic component may include a magnetic body including the transmission coil component. A coil seat surface is disposed thereon, wherein the magnetic body is formed to be curved to correspond to a curved surface of the power receiving device.

The magnetic component may include a coil guide component extending from the coil seat surface to guide the magnetic flux generated by the transmission coil component.

The charging station may further include: a station body; and a holding component formed in the station body to form a holding space for placing the electric vehicle, wherein the power transmission device is configured to be exposed in the accommodation space for wireless transmission. Power is supplied to the power receiving device placed in the holding space.

The power transmission device may be configured to face the holding space and include a plurality of transmission coil components arranged along an inner circumference of the holding member, wherein at least one of the plurality of transmission coil components may be configured to correspond to the electric power transmission device. This receiving coil component of the vehicle.

The electric vehicle may be located between a driving position as a drivable position and a charging position in which the electric vehicle is placed in the charging station to wirelessly receive the power from the power transmission device, wherein the charging station A guide member configured to guide the electric vehicle in a direction in which the electric vehicle moves from the driving position to the charging position may be included, wherein the guide member may include: a first guide member configured to guide the electric vehicle in a direction in which the electric vehicle moves from the driving position to the charging position. guiding the electric vehicle in a left-right direction; and a second guide member configured to guide the electric vehicle in a front-rear direction.

The second guide member may include: a first inclined surface formed inclinedly to lift the electric vehicle in a moving direction; and a second inclined surface extending from the first inclined surface in the moving direction, in the moving direction. The slope is formed downward to maintain the electric vehicle in the charging position.

The second guide member is pivotable between two positions: a first guide position in which the second guide member is placed on the ground; and a second guide position in which the second guide member is at a predetermined angle. Pivot to the ground, thereby moving the electric vehicle placed on the second guide component to the charging position.

The electric vehicle may include front wheels and rear wheels, wherein the second guide member may include: an inclined surface formed obliquely to raise the electric vehicle in a moving direction; and a step portion inclined from the The surface is arranged in the moving direction, and forms a step shape from one end of the inclined surface, so that the front wheel is stuck in the step portion.

Further, according to another embodiment of the present invention, a wireless charging system for an electric vehicle is provided, including: an electric vehicle including a battery, and a power receiving device configured to provide power to the battery; and a charging station, It includes a power transmission device configured to wirelessly transmit the power to the power receiving device and is configured to place the electric vehicle, wherein the power receiving device is configured to surround at least a portion of an exterior surface of the electric vehicle.

According to one aspect of the present invention, the charging efficiency of electric vehicles can be improved by strengthening the charging structure.

Furthermore, according to another embodiment of the present invention, the wireless charging device may be configured to correspond to the external shape of the electric vehicle so as to be firmly installed thereon, and the wireless charging efficiency thereof may be improved.

Furthermore, according to another embodiment of the present invention, the shape of the wireless charging device may be configured to have a shape corresponding to the outer surface of the electric vehicle, thereby making it possible to minimize collisions with obstacles provided on the movement route.

Furthermore, according to another aspect of the present invention, it is possible to prevent connection failure between the power transmission device and the power receiving device and ensure stable connection between them.

Furthermore, according to another aspect of the present invention, the electric vehicle can be stably placed in the charging station.

1:Wireless charging system

10: Electric scooter

10a: Driving position

10b:Charging position

12:Deck body

14: Shell frame

16: Foot pedal

18: Steering unit

18a: handle

18b:steering tube

20:Extension parts

20a:Mounting surface

22:Front wheel

23:Rear wheel

24: Drive motor

25:brake

26:Battery

30: Charging station

32:Station

34: Holding parts

36: Guide parts

50:Wireless charging device

60:Power receiving device

62:First shell

62a: Surface

63: Shell main body

63a:Open your mouth

63aa: Internal space

63b: Coupling surface

63bb: coupling space

64:Lid

66: First magnetic component

66a: First magnetic body

66aa: First coil seat surface

66b: First coil guide part

68: The first coil part

69:Seat frame clamp

70:Impact absorbing member

80:Power transmission device

82:Second shell

83: Shell main body

83a: Open your mouth

83aa: Internal space

84:Lid

84a: Shell space

84b: Seat slot

86:Second magnetic component

86a: Second magnetic body

86aa: Second coil seat

86b: Second coil guide part

88: Second coil component

130:Charging station

132:Station

132a: Opposite surface

134: Keep parts

134a: Keep space

140:Installation guide

140a: first position

140b:Second position

140c: third position

141a: First guide surface

141b: Second guide surface

141c: Third guide surface

230:Charging station

232:Station

232a: Opposite surface

234: Keep parts

234a: Keep space

280:Power transmission device

282:Second shell

286:Second magnetic component

288: Second coil component

342:Motion guide components

342a: First inclined surface

342b: Second inclined surface

442:Motion guide components

542:Motion guide components

542a: Inclined surface

542b: ladder part

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

1 is an exploded view of an electric vehicle and a charging station illustrating a wireless charging system according to an embodiment of the present invention;

FIG. 2 is a side view illustrating a wireless charging system according to an embodiment of the present invention.

FIG. 3 is a partial enlarged view of a wireless charging system according to an embodiment of the present invention.

4 is a view illustrating a state in which an electric vehicle moves to a charging station in the wireless charging system according to the embodiment of the present invention.

FIG. 5 is an enlarged view of the power receiving device in the electric vehicle of the wireless charging system according to an embodiment of the present invention.

6 is an exploded perspective view showing the power receiving device of the wireless charging system according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view taken on line AA' in FIG. 5 .

FIG. 8 is an enlarged view of the power transmission device in the charging station of the wireless charging system according to an embodiment of the present invention.

FIG. 9 is an exploded perspective view of the power transmission device in the charging station of the wireless charging system according to an embodiment of the present invention.

FIG. 10 is a cross-sectional view taken on line BB' in FIG. 8 .

11A and 11B are views illustrating an operation in which an electric vehicle is placed in a charging station in a wireless charging system according to another embodiment of the present invention.

12A and 12B are views illustrating an operation in which an electric vehicle is placed in a charging station in a wireless charging system according to another embodiment of the present invention.

13 is a view showing an operation of placing an electric vehicle at a charging station in the wireless charging system according to another embodiment of the present invention.

14 is a view illustrating a state in which an electric vehicle has been placed in a charging station in a wireless charging system according to another embodiment of the present invention.

15 is a view illustrating an operation in which an electric vehicle is placed in a charging station in a wireless charging system according to another embodiment of the present invention.

The embodiments of the present disclosure and the configurations illustrated in the drawings are only preferred examples of the present invention, and various modifications that can replace the embodiments and drawings of the present disclosure are possible at the time this application is filed.

In addition, the same reference numerals or symbols in the drawings of the present disclosure will represent parts or components having substantially the same function.

Furthermore, the terminology used herein is used only to describe particular embodiments and is not intended to limit the invention thereto. As used herein, the singular forms "a", "an" and "the" include the plural forms as well, unless the context clearly dictates otherwise. It will be further understood that the terms "includes," "includes," "includes," and/or "includes," when used herein, specify the presence of stated features, integers, steps, operations, elements and/or elements , but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.

In addition, terms including numbers such as “first”, “second”, etc. may be used to describe different elements in this disclosure, but such elements are not limited thereto. These terms are only used to distinguish one element from other elements. For example, the first element could also be named the second element without departing from the scope of the invention. pieces. Likewise, the second element can also be named the first element. The term "and/or" may include any combination of a plurality of related items and/or any one of a plurality of related items.

In addition, terms such as "component", "device", "block", "component", "module" and the like may refer to a unit that performs at least one function or operation. For example, these terms may refer to at least one piece of hardware, such as a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC), that is stored in a memory or processor At least one operation process performed by at least one piece of software.

In addition, terms such as "wrapped" and "wrapped" may include not only the case of direct contact with the wrapped subject, but also the case of an independent configuration separated from the subject interposed between the subject and the same wrapped subject.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, since the drawings of the present disclosure are only for illustrating one of several preferred embodiments of the present invention to facilitate understanding of the present invention and the technical spirit of the above invention, they should not be understood as being limited to the description illustrated in the drawings. .

1 is a perspective view of an electric vehicle and a charging station illustrating a wireless charging system according to an embodiment of the present invention, FIG. 2 is a side view illustrating a wireless charging system according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. 4 is a view illustrating a state in which an electric vehicle moves to a charging station in the wireless charging system according to the embodiment of the present invention.

The wireless charging system 1 may include an electric vehicle and a charging station 30 .

An electric vehicle may refer to a mobile device configured to use electricity as a source of power. The electric vehicle may include an electric scooter 10, an electric car, an electric wheel, an electric bicycle, an electric motorcycle, an electric vehicle with two parallel wheels, a robot cleaner, etc. In this embodiment, the case where the electric vehicle is the electric scooter 10 shown in FIGS. 1 to 4 has been described as an example, but it is not limited thereto.

The electric scooter 10 may include a deck body 12 and a steering unit 18 .

The deck body 12 can function as a supporting surface for the user to ride. In addition, the design of the deck body 12 can be changed into the form of a mobile structure that realizes smart mobility functions. In this case, the deck body may refer to an electric wheel, an electric bicycle, or the main body of an electric bicycle.

In addition, the deck body 12 is a footrest 16 on which the user can ride by lifting his feet. The deck body 12 can be manufactured as a deck-type structure on which users stand and ride. Alternatively, the deck body 12 may be configured as a seat-type structure by further including a seat member (not shown) on its upper surface. Or otherwise, the deck body 12 may be configured as a wheel-type structure by further including sole support members (not shown) on both sides of the wheel. However, the deck body 12 is not limited to a specific structure.

Deck body 12 may include a shell frame 14 . The housing frame 14 extends upwardly from the footrest 16 and may be configured to rotatably receive the steerer tube 18b, as will be described below.

The steering unit 18 may be rotatably coupled to the front end of the deck body 12 to perform a steering function. The steering unit 18 may include a handle 18a to which a brake lever and a shift lever are mounted, and a steering tube 18b for supporting the handle 18a for rotation therewith. The steering unit 18 may be arranged in front of the deck body 12 to change the traveling direction of the deck body 12 .

Each of the steering tube 18 b of the steering unit 18 and the shell frame 14 of the deck body 12 may be a component of the extension member 20 . That is, the handle 18a may be connected to the extension member 20 while the footrest 16 may be connected to the lower portion of the extension member 20 . In other words, the extension member 20 may be formed by including the steering tube 18b and the housing frame 14.

The electric scooter 10 may include a front wheel 22, a rear wheel 23, a drive motor 24 and a brake 25.

The front wheel 22 may be mounted on the lower part of the steering unit 18 in such a way that it is rotatably supported at its lower end below the aforementioned handle 18a. The front wheel 22 can be rotated by rotation of the handlebar 18a transmitted through the steering tube 18b. The steering angle of the front wheel 22 can be controlled by the user's steering operation transmitted from the handle 18a.

It can be understood that the front wheel 22 and the rear wheel 23 are collectively referred to as respective components including tires, wheel frames, bearings, etc.

The rear wheel 23 is a driving wheel that is installed at the rear end of the deck body 12 and is configured to be driven by the driving motor 24 . The drive shaft of the drive motor 24 can be matched with the wheel frame and wheel rotation axis of the rear wheel 23 to have a configuration as a wheel integrated motor device.

The drive motor 24 can drive the rear wheels 23 . Since the independent drive motor 24 can also be mounted on the front wheel 22 through an alternate design, the installation location of the drive motor 24 is not limited to a specific location. The drive motor 24 may refer to a conventional brushless DC motor (BLDC) or a drive and regenerative braking type motor (eg, an electric motor acting as a generator).

The brake 25 can also be installed on the front wheel 22 or the rear wheel 23, or can be installed on the front wheel 22 and the rear wheel 23 respectively. The brake 25 may be a mechanical brake using friction or an electromagnetic brake. Here, the electromagnetic brake refers to a regenerative brake or an electric regenerative brake, and may have a configuration in which the electromagnetic brake is operated in a closed circuit state by using an electric motor (for example, the drive motor 24 or a motor for a brake individually connected to the front wheel 22 ). The rotor connected to the front wheel 22 or the rear wheel 23 or the like is rotated by the inertial force generated when moving, so that the electric motor operates as a generator function, thereby exhibiting braking force by converting kinetic energy into electrical energy and recovering the kinetic energy.

Such a brake 25 can function to stop the front wheel 22 and the rear wheel 23, or reduce the rotation speed of the wheel, can also be used to perform a kick and go function on the inclined portion, or can be used with the control unit to be described below. (not shown) perform the cruise function together.

The battery 26 includes a plurality of battery cells connected in parallel and may be referred to as a rechargeable battery pack. As an example, the case where the battery 26 is installed on the deck body 12 has been described, but is not limited to this. The battery 26 may serve to power the drive motor 24 and a control unit (not shown). Additionally, the battery 26 may be used for operation of electric and electronic components, such as as a power source for the electric scooter 10 .

The wireless charging system 1 may include a wireless charging device 50 . The wireless charging device 50 can be installed on the electric scooter 10 and the charging station 30 respectively. The electric scooter 10 may be configured to wirelessly receive power through the power receiving device 60 of the wireless charging device 50 and supply it to the battery 26 .

The wireless charging device 50 may include a power receiving device 60 for wirelessly receiving power and a power transmitting device 80 for wirelessly transmitting power to the power receiving device 60 . The power transmission device 80 may be provided in the charging station 30 . That is to say, the wireless charging device 50 in this embodiment may collectively refer to the power transmission device 80 and the power receiving device 60 . Here, the power transmission device 80 may be installed in the charging station 30, and the power receiving device 60 may be installed in the electric scooter 10, respectively. The wireless charging device 50 can receive power wirelessly through the magnetic induction method, the magnetic resonance method, or the electromagnetic wave method.

As shown in FIGS. 2 and 3 , the power receiving device 60 and the power transmitting device 80 may be configured such that surfaces they face are inclined at a predetermined angle. Specifically, the extension member 20 may be configured to be tilted at a predetermined angle from the ground or footrest 16 , and the mutually facing surfaces of the power receiving device 60 and the power transmission device 80 may be configured to be tilted from the ground or footrest 16 . 16 Tilt at a predetermined angle. through this In this configuration, during the movement of the electric scooter 10 to the charging position 10b, the power receiving device 60 can slidably move to the power transmitting device 80, and through this movement, it is possible to make the power receiving device 60 slidably move to the power transmitting device 80 caused by the difference in height of the two components from the ground. Misalignment is minimized.

Charging station 30 may be configured to accommodate electric scooter 10 . The electric scooter 10 may be located between a driving position 10a (see Figures 1 and 3), which is a drivable position spaced from the charging station 30, and a charging position 10b (see Figure 2), which is placed or installed on the charging station. Rechargeable location on station 30.

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

The station 32 may be configured so that the electric scooter 10 may be placed. The station 32 may be seated on the ground, thereby maintaining the electric scooter 10 in an upright position.

The station 32 may include a retaining member 34 upon which the extension member 20 of the electric scooter 10 rests. The retaining member 34 may be configured to grip the steering tube 18 b or the housing frame 14 of the extension member 20 . In FIGS. 2 and 3 , the case where the steering tube 18 b of the extension member 20 is placed in the holding member 34 is described as an example, but it is not limited to this.

The station 32 may include a first guide member 36 .

The first guide portion 36 may be configured to guide the front wheel 22 of the electric scooter 10 . That is to say, the first guide member 36 can guide the front wheel 22 in the left and right direction while the electric scooter 10 moves to the station 32 for charging, so that the electric scooter 10 can be placed in a set position. The first guide member 36 may be configured to have a width that decreases toward the front in the moving direction in order to reliably guide the electric scooter 10 to move from the driving position 10a to the charging position 10b. However, the shape of the first guide member 36 is not limited to this. The first guide member 36 may have any configuration provided as long as it adequately guides the movement of the electric scooter 10 during movement of the electric scooter 10 to the charging position 10b.

The power transmission device 80 may be configured to wirelessly transmit power to the power receiving device 60 . The power transmission device 80 may be configured to transmit external power provided from the outside in the wireless power transmission method. The power receiving device 60 of the electric scooter 10 may be configured to wirelessly receive power transmitted from the power transmitting device 80 to charge the battery 26 . That is, the power transmission device 80 generates a magnetic field using an external power source, and the power receiving device 60 generates an induced electromotive force through the generated magnetic field, thereby supplying power to the battery 26 .

The power transmission device 80 may have a housing space 84a (see FIG. 1 ) formed therein to accommodate the power receiving device 60. The electric scooter 10 is placed in the charging station 30, during which the power receiving device 60 may be placed or inserted into the housing space 84a. Thus, the electric scooter 10 can be placed in the charging station 30 and can be in a chargeable state.

5 is an enlarged view of a power receiving device in an electric vehicle of a wireless charging system according to one embodiment of the present invention.

The power receiving device 60 may be disposed in the extension member 20 of the electric scooter 10 . The power receiving device 60 may be mounted on at least one of the steering tube 18b and the housing frame 14 of the extension member 20. In FIG. 5 and other drawings, the power receiving device 60 is illustrated as being mounted on the housing frame 14, but it is not limited thereto and may be mounted on the steering tube 18b.

The power receiving device 60 may be formed in a shape corresponding to the shape of the extension member 20 , and may be configured to cover at least a part of the outer surface of the extension member 20 . Thereby, the power receiving device 60 can be stably supported by the electric scooter 10 .

In other words, the power receiving device 60 may be configured to surround at least a portion of the outer surface of the electric scooter 10 . Since at least a part of the first magnetic member 66 to be described below is formed to be curved, the power receiving device 60 for accommodating the first magnetic member 66 may be configured integrally. Has a curved shape. That is, conventionally, there were limitations in the shape change of the magnetic component, but according to the present invention, the shape change is possible through the magnetic component having the material disclosed by the present invention, so that it is possible to design a power receiving device The shape of the mounting surface 20a on which the 60 is mounted corresponds to the shape. In addition, the shape of the power receiving device 60 may be designed to correspond to the mounting surface 20a. Thereby, even if at least a part of the extension member 20 is formed into a curved surface, the power receiving device 60 can be stably mounted on the extension member 20 .

With the above configuration, the space or gap between the power receiving device 60 and the extension member 20 of the electric scooter 10 can be omitted, making it possible to minimize air resistance. Furthermore, it is possible to prevent the connection portion between the power receiving device 60 and the extension member 20 from being exposed to the outside due to a space or a gap, thereby preventing the connection portion from being damaged. In addition, the center of gravity of the power receiving device 60 can more accurately coincide with the extension part 20 of the electric scooter 10, so that the electric scooter 10 can be stably driven.

FIG. 6 is an exploded perspective view illustrating the power receiving device of the wireless charging system according to one embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line AA′ in FIG. 5 .

The power receiving device 60 may include a first housing 62 , a first magnetic component 66 , and a first coil component 68 . The first coil component 68 may be a receive coil component.

The first housing 62 may be configured to house the first magnetic component 66 and the first coil component 68 . The first housing 62 may include a housing body 63 having an opening 63a formed on one side thereof, and a cover 64 for opening and closing the opening 63a. The first magnetic component 66 and the first coil component 68 may be disposed in the internal space 63aa of the housing body 63 through the opening 63a, and the opening 63a may be sealed by the cover 64.

The first housing 62 may be configured to house the first magnetic component 66 and the first coil component 68 to protect the first magnetic component 66 and the first coil component 68 . At least a portion of the first housing 62 may be formed to have a curved surface and may be configured to have a curved shape as a whole.

The first housing 62 may be configured to surround at least a portion of the circumference of the extension member 20 by its rear surface. The first housing 62 may include a recessed coupling surface 63b forming a coupling space 63bb on which the steering tube 18b or the housing frame 14 of the extension 20 is mounted. The coupling surface 63b may correspond to the mounting surface 20a of the extension member 20. Since the coupling surface 63b is formed to be curved to correspond to the mounting surface 20a of the extension member 20, it may be defined as a curved surface or a curved member. In the drawings of this embodiment, the case where the mounting surface 20a is formed in the housing frame 14 and the coupling surface 63b corresponds to such a mounting surface 20a is described as an example, but it is not limited thereto, and the mounting surface 20a may be formed in the steering wheel. in tube 18b. Since at least a portion of the outer surfaces of the steering tube 18b and the housing frame 14 of the extension member 20 include curved surfaces, the coupling surface 63b may be configured to include a corresponding curved surface. That is, the coupling surface 63 b may be configured so that the power receiving device 60 is mounted in close contact with the steering tube 18 b or the housing frame 14 of the extension member 20 .

The front surface of the first housing 62 may be formed to have a curved surface. That is, at least a part of the surface 62a exposed to the outside of the first housing 62 may be formed in a curved shape. Thereby, an impact applied to the power receiving device 60 from the outside can be dispersed, so that the durability of the first housing 62 itself and the first magnetic component 66 and the first coil component 68 disposed therein can be improved. Furthermore, as will be described below, it is possible to stably accommodate the first magnetic member 66 at least partially formed on the curved surface.

The first magnetic component 66 may be disposed in the first housing 62 . The first magnetic component 66 may be surrounded by the power receiving device 60 in the electric scooter 10 and may be configured to correspond to The mounting surface 20a (see Fig. 6) on which the power receiving device 60 is mounted. The first magnetic component 66 and the second magnetic component 86, described below, may perform a masking function for the coil components 68 and 88.

The first magnetic member 66 may include a first magnetic body 66a at least partially formed to be curved. The first magnetic body 66a may be formed to be partially curved, and may be formed to be integrally curved as shown in FIGS. 6 and 7 . By 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 can be stably mounted on the extension member 20 of the electric scooter 10 including a curved surface.

In addition, since at least a part of the first magnetic body 66a is formed as a curved surface, the area of the first coil seat surface 66aa on which the first coil member 68 is arranged can be formed wider in the width direction than the length, and thereby greatly Reduce charging time.

The first magnetic component 66 may include a first coil guide component 66b protruding from the first magnetic body 66a. The first coil guide member 66b may be lengthened in the longitudinal direction of the first magnetic body 66a. The first coil guide member 66b may protrude from the first coil seat surface 66aa forming the convex front surface of the first magnetic body 66a to guide the magnetic flux generated by the first coil member 68 disposed on the first coil seat surface 66aa. .

The first coil component 68 may be placed on the first coil seat surface 66aa of the first magnetic component 66 . Specifically, the first coil component 68 may be placed on the convex first coil seat surface 66aa of the first magnet 66a. Since the first coil member 68 is wound along the outer circumference of the first coil guide member 66b, it can be stably supported by the first coil seat surface 66aa. Since the first coil seat surface 66aa of the first magnet 66a is formed in the curved surface, the first coil portion 68 can be configured while forming the curved surface.

The first coil component 68 may be electrically connected to a controller (not shown). In addition, the first coil component 68 may be electrically connected to the battery 26 through a controller (not shown).

Power receiving device 60 may include a mounting clamp 69 . A mount clamp 69 may be disposed within the first housing 62 to support the first magnetic component 66 . That is, the mount clamp 69 may support the first magnetic component 66 so that the first magnetic component 66 disposed within the first housing 62 is fixed. The mount clamp 69 may be removably attached to the first housing 62 or may be integrally formed with the first housing 62 as a component of the first housing 62 . However, it is not limited to this, and the configuration of the mount clamp 69 may be omitted, or may be configured such that the first magnetic component 66 is supported by the inner surface of the first housing 62 .

Power receiving device 60 may include an impact absorbing member 70 . The impact absorbing member 70 may be configured to protrude to the front of the first housing 62 at a predetermined height. When the electric scooter 10 is placed in the charging station 30, the impact absorbing member 70 can prevent the power receiving device 60 and the power transmitting device 80 from being damaged due to impact caused by contact of the two components.

In addition, the impact absorbing member 70 may be configured to maintain a set distance between the first coil part 68 and the second coil part 88 of the power transmission device 80 so that they are spaced apart from each other, which will be described below when the electric scooter is used. 10 when located at charging position 10b. That is, when the electric scooter 10 is located at the charging position 10b, it may be configured such that the first coil component 68 and the second coil component 88 are maintained apart from each other by a predetermined interval by the protruding height of the impact absorbing member 70. Charging efficiency is maximized when the first and second coil components 68 and 88 are spaced apart from each other at a predetermined interval. Preferably, the predetermined interval is about 1 cm or more, about 2 cm or less. The impact absorbing member 70 may extend from the first housing 62 so that the coil components 68 and 88 are spaced apart from each other by the predetermined distance described above.

Furthermore, the impact absorbing member 70 may be configured to align the positions of the power receiving device 60 and the power transmitting device 80 when they are connected to each other. The power transmission device 80 includes a seat groove 84b to be described later, and the impact absorbing member 70 is seated in the seat groove 84b of the power transmission device 80, which In this way, the first coil component 68 of the power receiving device 60 can be stably aligned with the second coil component 88 of the power transmission device 80 .

FIG. 8 is an enlarged view of the power transmission device in the charging station of the wireless charging system according to one embodiment of the present invention. FIG. 9 is an explosion of the power transmission device in the charging station of the wireless charging system according to one embodiment of the present invention. A perspective view, and Figure 10 is a cross-sectional view taken on line BB' in Figure 8 .

Charging station 30 may include power transmission device 80 .

Power transmission device 80 may be supported by station body 32 . The power transmission device 80 may be disposed in the station body 32 to have a position corresponding to the position where the power receiving device 60 of the electric scooter 10 is disposed.

The power transmission device 80 may include a second housing 82 , a second magnetic component 86 , and a second coil component 88 . The second coil component 88 may be a transmission coil component.

The second housing 82 may be configured to house the second magnetic component 86 and the second coil component 88 . The second housing 82 may include a housing body 83 having an opening 83a formed on one side thereof, and a cover 84 for opening and closing the opening 83a. The second magnetic component 86 and the second coil component 88 may be disposed in the internal space 83aa of the housing body 83 through the opening 83a, and the opening 83a may be sealed by the cover 84.

The second housing 82 may be configured to house the second magnetic component 86 and the second coil component 88 thereby protecting the second magnetic component 86 and the second coil component 88 . The second housing 82 may be formed to have an overall curved shape. Specifically, the second housing 82 may be configured such that at least a portion thereof forms a curved surface.

At least a portion of the front surface of the second housing 82 may be formed to be curved. That is, at least part of the surface of the second housing 82 facing the power receiving device 60 may be formed in a curved shape. Thus, the second housing 82 may have a housing space 84a formed in front thereof, in which the power receiving device 60 is disposed, and the power receiving device 60 may be inserted or disposed in the housing space 84a.

The second housing 82 may include a seat 84b. The impact absorbing member 70 of the power receiving device 60 may sit in the seat groove 84b. The impact absorbing member 70 is seated in the seat groove 84 b of the power transmission device 80 so that the first coil component 68 of the power receiving device 60 can be stably aligned with the second coil component 88 of the power transmission device 80 . The seating groove 84 b may be disposed on the front surface of the second housing 82 to be recessed, corresponding to the impact absorbing member 70 .

The second magnetic component 86 may be disposed in the second housing 82 . The second magnetic component 86 may be configured to correspond to the first magnetic component 66 .

The second magnetic member 86 may include a second magnetic body 86a at least partially formed to be curved. The second magnetic body 86a may be formed to be partially curved, and may be formed to be entirely curved, as shown in FIGS. 9 and 10 . By the curved shape of the second magnetic body 86a, the overall shape of the power transmission device 80 can be formed to be curved, thereby allowing the power receiving device 60 having a curved surface to be stably mounted thereon.

Furthermore, since at least part of the second magnetic body 86a is formed as a curved surface, the area on the second coil seat surface 86aa where the second coil component 88 is arranged can be formed larger than the length in the width direction, thereby greatly reducing charging time.

The second magnetic component 86 may include a second coil guide component 86b protruding from the second magnetic body 86a. The second coil guide member 86b may form a lengthwise direction in the longitudinal direction of the second magnetic body 86a. Towards. The second coil guide member 86b may protrude from the recessed second coil seat surface 86aa of the second magnetic body 86a to guide the magnetic flux generated by the second coil member 88 disposed on the second coil seat surface 86aa.

The second coil component 88 may be placed on the second coil seat surface 86aa of the second magnetic body 86 . Specifically, the second coil component 88 may be placed on the recessed second coil seat surface 86aa of the second magnetic body 86a. Since the second coil member 88 is wound along the outer circumference of the second coil guide member 86b, it can be stably supported by the second coil seat surface 86aa. Since the second coil seat surface 86aa of the second magnetic body 86a is formed in the curved surface, the second coil portion 88 can be configured while forming the curved surface. The second coil component 88 may be electrically connected to an external power source. The second coil component 88 may wirelessly transmit power to the first coil component 68 .

The first coil component 68 and the second coil component 88 may each be wrapped with a conductive wire. The electrically conductive thread may include electrically conductive material. For example, the conductive line may include conductive metal. Specifically, the conductive wire may include at least one metal selected from copper, nickel, gold, silver, zinc, and tin.

The conductive thread can be Litz wire, where multiple thin wires are twisted and then coated. For example, a Litz line may consist of 10 or more, 100 or more, or 500 or more strands, particularly 500 to 1500 strands.

Conductive wires can also be covered with insulating shells. For example, the insulating shell may include an insulating polymer resin. Specifically, the insulating shell may include polyvinyl chloride (PVC) resin, polyethylene (PE) resin, Teflon resin, silicone resin, polyurethane resin, etc.

Conductive threads can be wound in the form of planar coils. Specifically, the planar coil may include a planar spiral coil. In this case, the shape of the planar coil may be an ellipse or a polygon, or a polygon with rounded corners, but is not particularly limited.

The coil portion may have a hollow shape in plan view, thereby having an outer dimension Od and an inner dimension Id. For example, when the coil component has a circular donut shape in plan view, the outer and inner dimensions may refer to the outer and inner diameters, and when the coil component has a rectangular donut shape in plan view, the inner and outer dimensions of the hollow rectangle may refer to outside length.

Specifically, the outer dimension (Od) of the coil component may be 50 to 1000 mm, 100 to 500 mm, 100 to 300 mm, 200 to 800 mm, 300 to 400 mm, or 500 to 1000 mm. Furthermore, the internal dimensions (Id) of the coil portion may be 5 to 300 mm, 10 to 200 mm, 150 to 250 mm, or 20 to 150 mm.

The number of windings of the conductive wire in the planar coil can be 5 to 50 times, 10 to 30 times, 5 to 30 times, 15 to 50 times, or 20 to 50 times.

As a specific example, the coil part is a planar spiral coil in which the conductive wire is wound 5 to 15 times, and can have an outer dimension of 50 to 200 mm and an inner dimension of 10 to 150 mm.

Within the above-mentioned preferred planar coil size and specification range, it may be suitable for fields such as electric vehicles that require large-capacity power transmission.

The diameter (C) of the conductive wire forming the coil portion can also be controlled within a predetermined range. For example, the diameter of the conductive thread 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. Furthermore, the diameter of the conductive thread 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 conductive thread may have a diameter of 0.5 to 3 mm.

The inductance of the coil component may be 30 μH or more, 50 μH or more, 70 μH or more, or 90 μH or more, or it may be 150 μH or less, 100 μH or less, 80 μH or less, or 60 μH or more. Small, especially 30 to 60μH, or 70 to 150μH, but not limited thereto.

The first magnetic component 66 and the second magnetic component 86 may include polymer-type magnetic components including binder resin and filler. Specifically, the magnetic member may include a polymer-type magnetic member including a binder resin and a filler dispersed in the binder resin. The polymeric magnetic component may include polymeric magnetic blocks (PMB).

In polymer-based magnetic parts, the fillers are bonded to each other via a binder resin, which reduces damage due to impact and reduces defects across large areas. The filler can be oxide filler, such as ferrite (Ni-Zn base, Mg-Zn base, Mn-Zn base ferrite, etc.); metal filler, such as permalloy, iron filings and nanocrystalline magnetic materials; or other Mix the powder. More specifically, the filler may be iron filing particles having a Fe-Si-Al alloy composition.

As an example, the filler may have the composition of Formula 1 below.

[Formula 1]Fe1-a-b-c Sia Xb Yc

a

0.2，0.01

b

0.1，以及0

c

0.05的範圍內。具體來說，在公式1中，X可以是Al、Cr或其組合。 In Equation 1, X is Al, Cr, Ni, Cu, or a combination thereof: Y is Mn, B, Co, Mo, or a combination thereof; and a, b, and c are each at 0.01

a

0.2, 0.01

b

0.1, and 0

c

Within the range of 0.05. Specifically, in Formula 1, X can be Al, Cr, or a combination thereof.

Fillers can include sand and dust.

The filler may have an average particle diameter (D50) in the range of about 1 to 300 μm, about 10 to 200 μm, or about 30 to 150 μm. When the average particle diameter of the filler meets the above range, the minimum The amount of position change at a temperature of 150 to 180°C is reduced, further improving the heat resistance and magnetism of the magnetic components, thereby improving charging efficiency.

The filler may be used 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 component.

For example, the polymeric magnetic component may include a filler in an amount of 60 to 90 wt%, 70 to 90 wt%, 75 to 90 wt%, 78 to 90 wt%, 80 to 90 wt%, 85 to 90 wt% , 87 to 90% by weight, or 89 to 90% by weight. If the filler content is less than 60wt.%, the position change of the polymer magnetic component increases and the heat resistance of the magnetic component decreases. In this way, the magnetic component may deform and break at high temperatures, resulting in a decrease in magnetic performance and reduced charging. efficiency.

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 meets the above range, the heat resistance and magnetism of the magnetic component can be further improved by minimizing the amount of position change at a temperature of 150 to 180°C, thereby improving charging efficiency.

The binder resin may include at least one resin selected from the group consisting of polyamide resin, polyamide resin, polyamide resin, polycarbonate resin, acrylonitrile-butadiene-styrene (ABS) Resin, polypropylene resin. Polyethylene resin, polystyrene resin, polyphenylene sulfide (PSS) resin, polyetheretherketone (PEEK) resin, silicone resin, acrylic resin, polyurethane resin, polyester resin, isocyanate resin and epoxy resin.

The binder resin may be a curable resin. Specifically, the adhesive resin may be a photo-curing resin and/or a thermal-curing resin, and in particular, may be a resin capable of exhibiting viscosity upon curing. More specifically, the binder resin may include at least one functional group or molecule that can be cured by heating, such as a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group or a amide group; or at least one functional group or molecule that can be cured by heating. Functional groups or molecules that are cured by active energy, such as epoxide groups, cyclic ether groups, sulfide groups, acetal groups or lactone groups. The above functional group or molecule may be, for example, an isocyanate group (-NCO), a hydroxyl group (-OH), or a carboxyl group (-COOH).

Specifically, the binder resin may include at least one selected from the group consisting of polyamide resin, polycarbonate resin, and polypropylene resin.

In addition, even if a resin with excellent heat resistance is used as the binder resin, when the resin is poorly mixed with the filler, the amount of change in its position may increase at a temperature of 150 to 180°C. Therefore, it may be important to select the binder resin and filler so that they are thoroughly mixed.

For example, polyamide resin may be used as the binder resin, and sand dust may be used as the filler.

The polymer type magnetic component may contain a binder resin in an amount of 5 to 40% by weight, 10 to 40% by weight, 10 to 20% by weight, 5 to 20% by weight, 5 to 15% by weight, or 7 to 15% by weight %.

According to one embodiment, the polymer type magnetic component may include a binder resin and a filler in amounts of 10 to 40% by weight and 60 to 90% by weight, respectively, in order to control the position change amount at a temperature of 150 to 180°C. 20% or less.

According to one embodiment, the polymer type magnetic component may include a binder resin and a filler in amounts of 10 to 20 wt.% and 80 to 90 wt.%, respectively, so as to control the position change amount at a temperature of 150 to 180°C. 3% or less.

In addition, the polymer type magnetic component may further include an additive. Specifically, the polymer-type magnetic component may further include at least one insulating coating agent selected from the group consisting of phosphoric acid and silane. The additives and the insulating coating agent may be added in amounts of 0.1 to 10 wt.%, respectively, based on the total weight of the polymeric magnetic component.

When the content of the additive is included in the above range, it is beneficial to reduce the amount of position change at a temperature of 150 to 180°C, thereby improving charging efficiency.

The permeability of polymeric magnetic components in the 79 to 90 kilohertz frequency band can vary depending on their material and can range from 5 to 150,000, specifically 5 to 300, 500 to 3,500, or 10,000 to 15 million, depending on its specific material.

In addition, the magnetic losses of polymer-based magnetic components in the 79 to 90 kilohertz frequency band can vary depending on their materials and can range from 0 to 50,000, specifically 0 to 1,000, 1 to 100, 100 to 1,000 , or in the range of 5,000 to 50,000, depending on the specific material.

As a specific example, when the magnetic component is a polymer type magnetic component including magnetic powder and a binder resin, specifically, a polymer type magnet block, its magnetic permeability in the frequency band of 79 to 90 kHz may be 5 to 500, 5 to 130, 15 to 80, or 10 to 50, while the magnetic loss can be 0 to 50, 0 to 20, 0 to 15, or 0 to 5.

The polymer magnetic component can be elongated at a predetermined speed. For example, polymer-based magnetic components can have an elongation of 0.5% or more. This elongation characteristic, which is difficult to obtain in ceramic-based magnetic parts without the application of polymers, can reduce damage even if large areas of the magnetic part are deformed by impact. Specifically, the elongation of the polymer-type magnetic component can reach 0.5% or more, 1% or more, or 2.5% or more. The upper limit of the elongation is not particularly limited, but when the content of the polymer resin is increased to increase the elongation, physical properties such as the inductance of the magnetic component may deteriorate, so the elongation is preferably set to 10% or less.

Since the first magnetic component 66 and the second magnetic component 86 include magnetic powder and polymer resin, these components can be easily manufactured into a curved shape. For example, the first magnetic component 66 and the second magnetic component 86 may be manufactured into a curved shape through an injection process.

Furthermore, the power transmission device 80 and the power reception device 60 may each include an antenna for performing communication. For example, the power receiving device 60 may include an NFC antenna, or similar antenna, to perform communication with the power transmitting device 80 . That is, the power transmitting device 80 and the power receiving device 60 can send and receive information to each other through the antenna.

The charging process of the electric vehicle wireless charging system according to the above description will be described below with reference to the above drawings.

The user can place the electric scooter 10 in the charging station 30 . At this time, the power receiving device 60 may be aligned with the power transmitting device 80, and the electric scooter 10 may be located at the charging position 10b. During this process, the front wheel 22 of the electric scooter 10 may be guided by the first guide part 36 of the charging station 30 , and the extension part 20 of the electric scooter 10 may be kept placed by the retaining part 34 of the charging station 30 .

When the electric scooter 10 is placed in the charging station 30 and the power receiving device 60 is in a state capable of being charged by the power transmission device 80 , power may be wirelessly provided to the power receiving device 60 through the power transmission device 80 . Then, an external AC voltage having a predetermined frequency may be applied to the second coil component 88 and power may be wirelessly transmitted from the second coil component 88 to the first coil component 68 . The battery 26 may perform charging operations by wirelessly transmitting power to the first coil component 68 .

When the electric scooter 10 is placed in the charging station 30 and the power receiving device 60 is in a state capable of being charged by the power transmission device 80, the controller (not shown) may indicate through an output device that it is in a chargeable state. Output devices may include speakers, LEDs, display devices, etc. The controller can output an alarm sound or buzzer through the speaker, change the LED from OFF to ON, or change the color of the LED to indicate that it is in a rechargeable state. In addition, the controller can indicate its chargeable status via a separate display device.

A wireless charging system for an electric vehicle according to another embodiment of the present invention will be described below. In the following additional embodiments, the same configurations as in the above-described embodiment will not be described repeatedly, but are denoted by the same reference numerals.

11A and 11B are views illustrating an operation in which an electric vehicle is placed in a charging station in the wireless charging system according to another embodiment of the present invention.

The power receiving device 60 may be disposed in the extension member 20 of the electric scooter 10 . The power receiving device 60 may be disposed on at least one of the steering tube 18b and the housing frame 14 of the extension member 20.

Charging station 130 may include a station body 132 including a retaining component 134 .

The retaining member 134 may be configured to receive the extension member 20 of the electric scooter 10 and the power receiving device 60 together. The holding part 134 may be concave so that the electric scooter 10 can be placed, and may have a holding space 134a formed therein to accommodate the extension part 20 of the electric scooter 10 and the power receiving device 60 . That is, the holding part 134 may be recessed from the opposite surface 132a facing the electric scooter 10 to form a holding space 134a in which the extension part 20 of the electric scooter 10 is placed in the station body 132.

In the above-described embodiment shown in FIGS. 1 to 3 , the case has been described in which the holding member 34 and the power transmission device 80 provided in the charging station 30 are spaced apart from each other in the vertical direction, so that The portion of portion 34 received on extension member 20 and power receiving device 60 are spaced apart from each other.

In the present embodiment, the holding part 134 of the charging station 130 houses the power receiving device 60 and the extension part 20 together, and allows the power receiving device 60 to operate in a chargeable state while being housed. Thus, the user can intuitively know whether the power receiving device 60 of the electric scooter 10 is in The rechargeable state or positioning of the electric scooter 10 is aligned with the desired position while the electric scooter 10 is placed in the charging station 130 .

The power transmission device 80 may be disposed inside the holding member 134 . It may be configured such that the power transmission device 80 is configured on the holding part 134 to form the holding space 134a together with the holding part 134. That is, the power transmission device 80 may be configured to be exposed on the holding space 134a. In this embodiment, the power transmission device 80 may be a component of the retaining member 134 . The impact absorbing member 70 of the power receiving device 60 may be disposed in the seat groove 84b of the power transmitting device 80. To this end, the seat groove 84b may be configured to be exposed in the holding space 134a.

With the above configuration, when the power receiving device 60 is disposed in the holding space 134a of the holding member 134, it can be in a chargeable state and can wirelessly receive power from the power transmission device 80 in combination with the housing.

Charging station 30 may include a mounting guide 140 . The mounting guide 140 may be disposed on the holding space 134a. The mounting guide 140 may be operatively and resiliently rotatably mounted in the retaining member 134 .

It may be configured that the mounting guide 140 is pressed by the power receiving device 60 or the extension member 20 so that the mounting guide 140 is pivoted to be inserted into the retaining member 134 or elastically returned to the original position. That is, the mounting guide 140 can be operated such that the mounting guide 140 is pivoted between a first position 140a extending from the mounting member 134 shown in FIG. 11A (i.e., an original position) and a second position 140b, The first position 140a is formed by inserting the holding member 134 by being pressed by the force receiving device 60 or the extension member 20, as shown by the dotted line and the two dotted lines in FIG. 11B. Additionally, the mounting guide 140 may be operated to elastically return the mounting guide 140 to the third position 140c, as shown by the solid line in FIG. 11B , after the power receiving device 60 and the extension member 20 are inserted into the holding space 134a. supports the power receiving device 60 or the extension member 20 the rear surface. Thereby, the mounting guide 140 can support the electric scooter 10 placed in the charging station 30 at the third position 140c.

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

The first guide surface 141a is formed obliquely so as to be pressed by the power receiving device 60 when the mounting guide 140 is pivoted by the electric scooter 10 from the first position 140a to the second position 140b. The second guide surface 141b may be formed obliquely so as to be pressed by the extension member 20 when the mounting guide 140 pivots from the third position 140c to the first position 140a when the electric scooter 10 is separated from the charging station 130. The third guide surface 141 c may be configured to support at least a portion of the extension member 20 when the electric scooter 10 is placed in the charging station 130 . Although the guide surfaces have been described separately for convenience of description, they are not limited thereto. The mounting guide 140 may have any configuration provided so long as it adequately guides or supports the electric scooter 10 in conjunction with the placement of the electric scooter 10 .

The operation of the charging system having the electric vehicle according to the above configuration will be described below.

As shown in FIG. 11A , in order to place the electric scooter 10 in the charging station 130 , the user can move it into the charging station 130 . Prior to being inserted into the retaining member 134, the mounting guide 140 may be in the first position 140a.

During the insertion of the extension part 20 and the power receiving device 60 of the electric scooter 10 into the holding part 134, the first guide surface 141a of the mounting guide 140 is pressed by the power receiving device 60, and the mounting guide 140 moves from the first position 140a pivots to the second position 140b.

When the extension part 20 and the power receiving device 60 of the electric scooter 10 are inserted into the holding part 134 so that the power receiving device 60 is in a state capable of being charged by the power transmission device 80, the mounting guide 140 elastically returns from the second position 140b and Pivot to third position 140c. In third position 140c, The mounting guide 140 may support the extension member 20 through the third guide surface 141c shown in FIG. 11B. In addition, the second guide surface 141b may also support the power receiving device 60.

When the electric scooter 10 is separated 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 pivot from the third position 140c to the second position 140b. . When the extension part 20 and the power receiving device 60 of the electric scooter 10 are separated from the holding part 134, the mounting guide 140 may elastically return to the first position 140a from the second position 140b.

The controller (not shown) may detect the arrangement state of the electric scooter 10 through the mounting guide 140 and may selectively perform holding of the charging station 130 by the electric scooter 10 .

In other words, the controller can detect that the mounting guide 140 rotates sequentially between the first position 140a to the third position 140c, thereby determining whether the electric scooter 10 is placed in the holding part 134, and determines whether the electric scooter 10 is removed from the electric scooter 10 through detection. Whether other types of electric scooters are placed on the charging station 130.

In addition, by maintaining the mounting guide 140 in the third position 140c, the controller can prevent the electric scooter 10 from being arbitrarily separated from the charging station 130 by external force.

With the above configuration, placing and charging of the electric scooter 10 can be performed simultaneously, and the operation of separately moving the electric scooter 10 to align the power transmission device 80 with the power receiving device 60 can be omitted. Furthermore, through this, charging and installation of the electric scooter 10 can be performed intuitively.

A wireless charging system for an electric vehicle according to another embodiment of the present invention will be described below.

12A and 12B are views illustrating an operation in which an electric vehicle is placed in a charging station in the wireless charging system according to another embodiment of the present invention.

The power receiving device 60 may be disposed in the extension member 20 of the electric scooter 10 . In this embodiment, the power receiving device 60 may be provided in the steering tube 18b of the extension member 20. The steering tube 18b is a component of the steering unit 18, and is configured to be rotatable according to steering, so that the power receiving device 60 is configured to change the facing direction according to the rotation of the steering tube 18b.

Charging station 230 may include a station body 232 including a receiving portion 234 .

The retaining member 234 may be configured to receive the extension member 20 of the electric scooter 10 and the power receiving device 60 together. The holding part 234 may be concave so that the electric scooter 10 can be placed, thereby forming a holding space 234a in which the extension part 20 of the electric scooter 10 and the power receiving device 60 are accommodated. That is, the holding part 234 may be recessed from the opposite surface 232a facing the electric scooter 10 to form a holding space 234a in which the extension part 20 of the electric scooter 10 is placed in the station body 132 .

Since the power receiving device 60 is mounted on the steering tube 18b rotatably configured to be turned, the facing direction can be changed even in a state where the electric scooter 10 is placed. In the present embodiment, when the power receiving device 60 is arranged in the holding space 234a, charging can be performed regardless of which direction the first coil part 68 of the power receiving device 60 faces.

Power transmission device 280 may include a plurality of second coil components 288 . The plurality of second coil components 288 may be arranged side by side toward the holding space 234a. That is, the plurality of second coil members 288 may be arranged along the inner circumference of the holding member 234 . Even when the electric scooter 10 is placed in the charging station 230, the steering tube 18b may be rotatably configured together with the handle 18a.

In the charging station 230, among the plurality of second coil components 288, the second coil component 288 facing the first coil component 68 of the power receiving device 60 may be activated for wireless charging. That is to say, even if the power receiving device 60 of the electric scooter 10 is not placed as the dotted line - two in Figure 12B Facing the front shown by the dotted line, power may also be wirelessly transmitted to the first coil component 68 of the power receiving device 60 through the second coil component 288 facing the first coil component 68 of the plurality of second coil components 288 .

In the present embodiment, the case where the power transmission device 80 includes a second housing 282, a plurality of second coil components 288, and a plurality of second magnetic components 286 disposed in the second housing 282 has been described, but this is not the case. Not limited to this. As an example, a plurality of power transmission devices 280 may be provided and arranged, each having a second housing 282, a second coil component 288, and a second magnetic component 286. Additionally, the power transmission device 280 may be configured to arrange a plurality of second coil components 288 within one second magnetic component 286 . The shape and number of power transmission devices 80 are not limited. The power transmission device 80 may have any configuration as long as it adequately and selectively matches the plurality of second coil components 288 with the first coil component 68 .

Through the above configuration, when the electric scooter 10 is placed in the charging station 230, there is no need for a separate operation to align the power transmission device 280 with the power receiving device 60, and the electric scooter 10 can be stably charged.

A wireless charging system for an electric vehicle according to another embodiment of the present invention will be described below.

13 is a view illustrating an operation of placing an electric vehicle in a charging station in the wireless charging system according to another embodiment of the present invention.

Station 32 may include motion guide components 342 . The above-mentioned first guide part 36 may be configured to guide the electric scooter 10 in the left-right direction, and the motion guide part 342 may be configured to guide the electric scooter 10 in the front-rear direction. The movement guide component 342 may be defined as a second guide component. The guide component may refer to at least one of the first guide component 36 and the motion guide component 342 . In other words, the guide member may refer to at least one of the first guide member 36 and the second guide member. Guide components can be The electric scooter 10 is guided in the direction of moving from the driving position 10a to the charging position 10b.

The motion guide member 342 may be configured to guide the front wheel 22 of the electric scooter 10 . The motion guide member 342 may be configured to guide the motion of the electric scooter 10 to the charging position 10b and maintain it in the charging position 10b.

The motion guide part 342 may include a first inclined surface 342a and a second inclined surface 342b.

The first inclined surface 342a may be formed at an angle, so that when the electric scooter 10 moves to the charging position 10b, the front wheel 22 can be lifted. That is, the first inclined surface 342a may be configured to have an inclination that increases toward the front.

The second inclined surface 342b may be configured to prevent the front wheel 22 from moving rearwardly when the electric scooter 10 is in the charging position 10b. That is, the second inclined surface 342b may be configured to have an inclination decreasing toward the front.

The electric scooter 10 can stably move to the charging position 10b through the movement guide part 342 and remain in this position.

A wireless charging system for an electric vehicle according to another embodiment of the present invention will be described below.

14 is a view illustrating a state in which an electric vehicle has been placed in a charging station in a wireless charging system according to another embodiment of the present invention.

Station 32 may include a motion guide member 442.

The motion guide member 442 may be configured to guide the motion of the electric scooter 10 to the charging position 10b and maintain it in the charging position 10b.

Movement guide member 442 may be configured to be lifted. Specifically, the motion guide member 442 may be configured to be inclined at a predetermined angle relative to the first guide member 36 . The motion guide member 442 is operable between first and second guide positions. The first guide position is a state in which the movement guide member 442 is placed on the ground, as shown by the dotted line-two-dot line in FIG. 14 . In the first guide position, the electric scooter 10 can move to the upper surface of the motion guide member 442 during movement to the charging position 10a. Meanwhile, the second guide position may be a position in which the movement guide member 442 is tilted from the first guide position, as shown by the solid line in FIG. 14 . When the rear wheel 23 of the electric scooter 10 is located on the upper surface of the movement guide part 442 in the first position, the movement guide part 442 can be tilted to the second guide position, so that the electric scooter 10 can be arranged tilted forward as a whole. As described above, through the tilt operation of the motion guide part 442, the electric scooter 10 can be stably located at the charging position 10b.

When the electric scooter 10 is detached from the charging station 30, the motion guide member 442 can pivot downward to be in the first guide position. Since the movement guide part 442 is located in the first guide position, the electric scooter 10 can easily move backward from the charging station 30 .

Furthermore, it may be configured that the movement of the electric scooter 10 to the charging position 10b is detected by a separate detection sensor (not shown), and the operation of the motion guide part 442 is performed by the controller (not shown) based on the detection result. . Additionally, operation of the motion guide member 442 may be performed by the controller via a separate switch. Additionally, the motion guide member 442 may be configured to be lifted by physical manipulation, such as manual manipulation by a user.

A wireless charging system for an electric vehicle according to another embodiment of the present invention will be described below.

15 is a view illustrating an operation in which an electric vehicle is placed in a charging station in the wireless charging system according to another embodiment of the present invention.

Station 32 may include a motion guide member 542.

The motion guide member 542 may be configured to guide the front wheel 22 of the electric scooter 10 . The motion guide component 542 may be configured to guide the motion of the electric scooter 10 to the charging position 10b and maintain it in the charging position 10b.

The motion guide member 542 may include an inclined surface 542a and a stepped portion 542b.

The inclined surface 542a can be formed in an inclined manner so that when the electric scooter 10 moves to the charging position 10b, the front wheel 22 can be lifted. That is, the inclined surface 542a may be configured to have an inclination that increases toward the front in the moving direction.

Step portion 542b may be configured to maintain the position of front wheel 22 of electric scooter 10 when electric scooter 10 is in charging position 10b. Specifically, stepped portion 542b may be configured to prevent front wheel 22 from moving forward or rearward. The stepped portion 542b is formed into a stepped shape with a predetermined depth from the front end of the inclined surface 542a, so that the front wheel 22 fixed in the stepped portion 542b may not be easily separated. Thereby, the electric scooter 10 can stably move to the charging position 10b through the movement guide member 542 and remain in this position.

Thus, specific embodiments of the invention have been illustrated and described in detail. However, the present invention is not limited to the above-described embodiments, and those skilled in the art will understand that various changes and modifications can be implemented without departing from the technical spirit of the present invention described in the following claims.

1:Wireless charging system

10: Electric scooter

10a: Driving position

12:Deck body

14: Shell frame

16: Foot pedal

18: Steering unit

18a: handle

18b:steering tube

20:Extension parts

22:Front wheel

23:Rear wheel

24: Drive motor

25:brake

26:Battery

30: Charging station

32:Station

34: Holding parts

36: Guide parts

50:Wireless charging device

60:Power receiving device

80:Power transmission device

84a: Shell space

Claims (14)

An electric vehicle includes: a foot pedal; an extension component including a housing frame extending from the foot pedal, and a steering tube rotatably coupled to the housing frame; a handle coupled to the steering tube to control driving direction; and a power receiving device surrounding at least a portion of the outer surface of the extension member, wherein the power receiving device includes: a receiving coil component; and a magnetic component, the receiving coil component is disposed in the magnetic component, wherein the The magnetic component includes: a coil seat surface on which the receiving coil component is disposed; and a coil guide component extending from the coil seat surface to guide the magnetic flux generated by the receiving coil component. The electric vehicle of claim 1, wherein the power receiving device includes a curved member formed to be curved to correspond to the outer surface of the extending member. The electric vehicle of claim 2, wherein the magnetic component is formed to be curved to correspond to the curved component. The electric vehicle according to claim 3, wherein the magnetic component includes a magnetic body having the coil seat surface, and wherein at least a portion of the magnetic body is formed to be curved to correspond to the curved component. The electric vehicle according to claim 1, wherein the receiving coil component corresponds to the transmission coil component of the charging station, and the power receiving device includes: a housing in which the magnetic component is accommodated; and an impact absorbing member, It extends from the housing to face the transmission coil component. Wherein the impact absorbing member is configured such that the receiving coil component and the transmitting coil component are spaced apart from each other by a set distance. A charging station includes: a power transmission device configured to wirelessly transmit power to a power receiving device of an electric vehicle, wherein the power transmission device includes: a transmission coil component; and a magnetic component, the transmission coil component is disposed on the magnetic component , wherein the magnetic component includes: a coil seat surface, the transmission coil component is disposed on the coil seat surface; and a coil guide component, the coil guide component extends from the coil seat surface to guide the energy generated by the transmission coil component of magnetic flux. The charging station of claim 6, wherein the power transmission device is configured to form a concave housing space, and the curved surface of the power receiving device is accommodated in the concave housing space, wherein the magnetic system is formed as Curved to correspond to the curved surface of the power collection device. The charging station as described in claim 6 further includes: a station body; and a holding component formed in the station body to form a holding space, and the electric vehicle is placed in the holding space; wherein the electrical transmission device is configured to be exposed in the holding space to wirelessly transmit power to a person placed in the holding space The power receiving device in . The charging station according to claim 8, wherein the power transmission device is disposed facing the holding space, wherein the transmission coil components are provided in plurality, and the plurality of transmission coil components are provided along the inner surface of the holding component. A circumferential arrangement, wherein at least one of the plurality of transmit coil components is configured to correspond to the receive coil component of the electric vehicle. The charging station of claim 6, wherein the electric vehicle is located between a driving position as a drivable position and a charging position in which the electric vehicle is placed in the charging station to wirelessly receive power from the the electric power of the transmission device, wherein the charging station includes a guide member configured to guide the electric vehicle in a direction in which the electric vehicle moves from the driving position to the charging position, wherein the guide member includes: a guide member configured to guide the electric vehicle in a left-right direction; and a second guide member configured to guide the electric vehicle in a front-rear direction. The charging station according to claim 10, wherein the second guide part includes: a first inclined surface formed inclinedly to lift the electric vehicle in the moving direction; and a second inclined surface formed from the moving direction in the moving direction. The first inclined surface extends and is formed inclined downward in the moving direction to keep the electric vehicle in the charging position. The charging station of claim 10, wherein the second guide member operates between: a first guide position in which the second guide member is placed on the ground; and a second guide position, in the second guide position, the second guide component is tilted to the ground at a predetermined angle, so that the electric vehicle placed on the second guide component moves to the charging position. The charging station according to claim 10, wherein the electric vehicle includes front wheels and rear wheels, wherein the second guide member includes: an inclined surface formed obliquely so that the electric vehicle rises in the moving direction; and from the inclined surface A stepped portion is arranged in the moving direction, and is formed into a stepped shape from one end of the inclined surface, so that the front wheel is stuck in the stepped portion. A wireless charging system for an electric vehicle, comprising: an electric vehicle including a battery and a power receiving device configured to provide power to the battery; and a charging station including a power transmission device configured to The power is wirelessly transmitted to the power receiving device, and the charging station is configured to place the electric vehicle, wherein the power receiving device is configured to surround at least a portion of an outer surface of the electric vehicle, and wherein the power receiving device includes: a receiving coil component; and a magnetic component, the receiving coil component is disposed in the magnetic component, wherein the magnetic component includes: a coil seat surface, the receiving coil component is disposed on the coil seat surface; and A coil guide component extends from the coil seat surface to guide the magnetic flux generated by the receiving coil component.

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