KR101974718B1 - Wireless charger utilizing a three-dimensional coil structure - Google Patents

Abstract

The present invention relates to a charging device for a battery-powered mobile device, and to a wireless charging device (100) for wirelessly charging a mobile device using a coil having a 3D solid structure without using wires. The second coil plate 220 is formed three-dimensionally and formed a predetermined angle with the first coil plate 210 in a state spaced apart from both sides of the first coil plate 210 and the first coil plate 210 of the And a transmitter (200) having a third coil plate (230) and a plate-shaped receiver (300) disposed in an interior space of the transmitter (200); And a current flows in at least one of the first to third coil plates 210, 220, and 230 provided in the transmitter 200 to wirelessly transmit power to the receiver 300. It is characterized by.

Description

WIRELESS CHARGER UTILIZING A THREE-DIMENSIONAL COIL STRUCTURE}

The present invention relates to a charging device for a battery operated mobile device, and to a wireless charging device for wirelessly charging a mobile device using a coil having a 3D structure without using wires.

As wearable devices such as smart phones and smart watches that can be used regardless of place have been steadily developed and popularized, they can be used by everyone regardless of gender.

The wearable device can be used anywhere because it is powered by a battery provided inside, but when the battery is exhausted, the wearable device can no longer be used.

In order to charge the wearable device, the charging terminal of the charger is inserted into a connection terminal formed in the wearable device to charge the battery for a predetermined time.

However, in such a charging method, the connection terminal of the wearable device is exposed to the outside, which may be easily contaminated with various foreign substances, which seriously affects the life of the device. In addition, in the case of the charging terminal, even if the terminal is easily broken or bent under a small impact, charging may not be possible due to a poor contact of the terminal.

In order to overcome such a problem, a number of wireless charging schemes have been proposed.

For example, Korean Patent Publication No. 10-2016-0055004 (published date: 2016.05.17.) Is a transmitter for a wireless charger, even if a plurality of flat coils are connected so that some of them overlap each other. It relates to a transmitter for a wireless charger that can eliminate the.

As another example, Korean Utility Model Publication No. 20-2013-0004994 (published: 2013.08.21.) Is a coil for a wireless charger, a wireless charger that can be charged by charging the battery of a small electronic device in a non-contact manner. It relates to a coil structure used in the power storage unit of.

In addition, various types of devices or methods for wireless charging have been proposed.

Korean Laid-Open Patent Publication No. 10-2016-0055004 (published date: May 17, 2016) Korean Utility Model Publication No. 20-2013-0004994 (Publication date: August 21, 2013)

The present invention is to provide a wireless charging device having a high charging efficiency by the three-dimensional coil structure.

Wireless charging device consisting of a three-dimensional structure coil according to the present invention for achieving this object forms a predetermined angle with the first coil plate in a state spaced apart from both sides of the plate-shaped first coil plate and the first coil plate. And a transmitter having a second coil plate and a third coil plate disposed in three dimensions, the receiver having a plate shape disposed in an internal space of the transmitter, wherein at least one coil plate of the first to third coil plates provided in the transmitter. When a current flows in, power is transmitted to the receiver wirelessly.

Preferably, in the present invention, the receiver is installed inside the transmitter arranged in the '' 'shape.

Preferably, in the present invention, the receiver is capable of adjusting the inclination angle with respect to the height direction of the first coil plate and the rotation angle with respect to the plane direction of the first coil plate.

Preferably, in the present invention, the receiver is arranged to have an inclination of 0 to 60 degrees from the height direction of the first coil plate.

Preferably, in the present invention, the receiver is rotated from 0 degrees or 180 degrees from the plane direction of the first coil plate.

Preferably, in the present invention, a coil is wound around the first to third coil plates a plurality of times, and the first coil plate, the second coil plate, and the third coil plate are formed in a quadrangular shape. The coil is formed in a wound shape.

Preferably, in the present invention, the first coil plate and the receiver are formed in a shape smaller than the size of the second coil plate and the third coil plate.

Preferably, in the present invention, at least one coil plate made of at least three plate-shaped includes a transmitter disposed in the '' 'shape and a plate-shaped receiver disposed in the transmitter inner space, at least one of the coil plate provided in the transmitter When a current flows through the coil plate, the power is wirelessly transmitted to the receiver.

Preferably in the present invention, the receiver is characterized in that it is arranged to have an inclination of 0 to 60 degrees from the height direction of the coil plate connecting the pair of coil plates facing each other.

Preferably, in the present invention, the receiver is arranged such that the axis perpendicular to the plane direction of the coil plate connecting the pair of coil plates facing each other is rotated at 0 degrees or 180 degrees with respect to the rotation axis.

Preferably, in the present invention, the size of the coil plate and the receiver connecting the pair of coil plates facing each other is formed to a size smaller than the pair of coil plates facing each other.

Wireless charging device consisting of a three-dimensional structure coil according to the present invention has the effect that the charging efficiency is higher than the coil of the two-dimensional structure.

Wireless charging device consisting of a three-dimensional structure coil according to the present invention has an excellent charging efficiency even if the receiver is located at various angles.

Wireless charging device consisting of a three-dimensional structure coil according to the present invention is applicable to a variety of peripheral devices such as cup holder.

1 is a conceptual diagram of a wireless charging device consisting of a three-dimensional structure coil according to the present invention,
2 is a charging efficiency graph according to the inclination angle for the receiver of the present invention,
3 is a charging efficiency graph according to the rotation and tilt angles of the transmitter and the receiver of the present invention;
4 is a graph comparing the average charging efficiency of the inclination angle of each coil plate of the present invention,
5 is a wireless charging efficiency graph according to the rotation angle of the first coil plate,
6 is a view showing an embodiment of a wireless charging device consisting of a three-dimensional structure coil according to the present invention.

Specific structural or functional descriptions presented in the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. In addition, it should not be construed as limited to the embodiments described herein, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 is a conceptual diagram of a wireless charging device consisting of a three-dimensional structure coil according to the present invention.

In the wireless charging system using a magnetic induction method, it is composed of a coil having a three-dimensional structure by using a plurality of coils in order to increase the wireless charging efficiency than the coil of a conventional two-dimensional planar structure.

The wireless charging device 100 (hereinafter, referred to as a “wireless charging device”) formed of a three-dimensional structure coil includes a transmitter 200 and a receiver 300.

Transmitter 200 is a transmitting antenna (transmitting antenna) consisting of a TX coil, three plate-shaped coil plate 210, 220, 230 is provided, the receiver 300 is a receiving antenna consisting of RX coil antenna (receiving antenna).

Transmitter 200 composed of three coil plates 210, 220, 230 forms a predetermined angle while being spaced apart from both side ends of the first coil plate 210 and the first coil plate 210. It includes a second coil plate 220 and the third coil plate 230 disposed in the.

The first to third coil plates 210 and 220 and 230 may be formed in a rectangular shape, and the second coil plate 220 and the third coil plate 230 may be installed to face each other. At this time, the transmitter 200 is in the form of a 'c' as a whole, the coil plates 210, 220, 230 need not be located to be in contact with each other, but will have to maintain their respective positions.

In more detail, when viewed from the front of FIG. 1, the transmitter 200 may have a 'c' shape in which an upper portion thereof is opened.

The receiver 300 is located inside the space formed by the coil plates 210, 220, 230 of the transmitter 200, and the height direction of the first coil plate 210, that is, Z with respect to the XY plane in FIG. 1. The angle of inclination θ in the axial direction and the plane direction of the first coil plate 210, that is, the rotation angle φ may be adjusted to the rotation axis of the Z axis with respect to the XY plane in FIG. 1.

Meanwhile, when a current flows in at least one of the first to third coil plates 210, 220, 230, each coil plate 210, 220 is applied. The magnetic field is formed toward both ends in the center of the 230, and the power is transferred to the receiver 300 in a magnetic induction manner to perform charging.

The size of the first coil plate 210 consists of a horizontal 80-90mm, a vertical 30-40mm, the second coil plate 220 and the third coil plate 230 is a horizontal, vertical 80-90mm size consist of. The size of the receiver 300 is 60-90mm wide and 60-90mm long, and the rated output is 5V / 6A.

The second coil plate 220 and the third coil plate 230 are of the same size and consist of the largest coil plate, and the first coil plate 210 and the receiver 300 are the second and third coils. It may have a shape smaller than the size of the plate (220, 230).

Therefore, in the transmitter 200 having a three-dimensional structure, a section in which magnetic fields generated toward both ends are overlapped at the center of the coil plates 210, 220, and 230 is generated, so that the charging efficiency of the receiver 300 is two-dimensional. Will rise above the structure.

In addition, since the coil plates 210, 220, and 230 are larger than the receiver 300, the receiver 300 may be easily inserted into and taken out of the internal space of the transmitter 200, and may be charged at any angle.

2, the charging efficiency according to the receiver tilt angle of the wireless charging device according to the present invention is shown in a graph.

In order to measure the charging efficiency of the receiver 300 located in the transmitter 200, the first to third coil plates 210, 220, 230 are applied to the input voltage 12V / 1A as a power supply, and the receiver 300 is provided. Connect to loader to output 5V / 0.6A (output 3W) at. And the efficiency according to the measurement position is measured by the output ratio to the input.

When the first coil plate 210 of the transmitter 200 is referred to as XY plane and the height direction of the first coil plate 210 is referred to as the Z axis, the receiver 300 changes the angle in the Z axis direction. The inclination angle θ is referred to as an angle of rotation on the XY plane.

In this case, the charging efficiency measured by changing the receiver 300 at a rotation angle φ of 0 degrees and an inclination angle θ of 0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, and 90 degrees, respectively, is shown in the following table. It consists of 1

Tilt angle 1st coil version 2nd coil version 3rd coil version 0 65.27 65.79 65.27 15 64.6 64.6 60.83 30 61.27 61.27 54.35 15 59.38 59.38 49.5 60 56.56 56.56 38.7 75 40.26 40.26 10.04 90 39.37 39.37 0

When comparing the measured efficiency, the charging efficiency of the first coil plate 210 and the second coil plate 220 is almost the same, the charging efficiency of the first coil plate 210 and the second coil plate 220 is It is higher than the charging efficiency of the third coil plate 230.

That is, the charging efficiency of the first coil plate 210 and the second coil plate 220 substantially matches, and the charging efficiency decreases as the inclination angle θ is increased. In addition, as the inclination angle θ becomes larger, a difference in filling efficiency of the first coil plate 210 and the second coil plate 220 is greater than that of the third coil plate 230.

Referring to Figures 3 and 4, it is shown by comparing the average charging efficiency with respect to the inclination angle of the coil and the charging efficiency graph according to the tilt and rotation of the transmitter and the receiver according to the present invention.

Under the same conditions as the charging efficiency measuring method, when the vertical direction from the plane of the first coil plate 210 is called the Z axis, the charging angle is measured by rotating only the rotation angle () of the receiver 300 to 180 degrees with the Z axis as the rotation axis. One result is configured as shown in Table 2 below.

Tilt angle 1st coil version 3rd coil version 2nd coil version 0 65.79 65.27 65.27 15 65.45 64.6 60.83 30 60.39 61.27 54.35 15 59.1 59.38 49.5 60 56.31 56.56 38.7 75 39.62 40.26 10.04 90 37.09 39.37 0

The charging efficiency of the first coil plate 210 and the third coil plate 230 is substantially the same, and as the inclination angle θ is increased, the charging efficiency is lowered. In addition, as the inclination angle θ increases, the charging efficiency of the first coil plate 210 and the third coil plate 230 becomes greater than the charging efficiency of the second coil plate 220.

That is, the experiment in which the charging efficiency of the first coil plate 210 and the second coil plate 220 are almost the same according to the rotation angle φ of the receiver 300 and the first coil plate 210 and the third coil. It shows a symmetrical structure in which the filling efficiency of the coil plate 230 is almost identical.

Meanwhile, as the inclination angle θ of the receiver 300 increases from 0 degrees to 90 degrees, the average charging efficiency is higher in the second coil plate 220 and the third coil plate 230 than in the first coil plate 210. This is slightly higher but also reversed, and its absolute value gradually decreases.

Therefore, the charging efficiency is shown to be good when the receiver is positioned at an inclination angle of 0 degrees to 60 degrees from the first coil plate, and when the inclination is larger than 60 degrees, the charging efficiency is rapidly lowered.

Referring to FIG. 5, the wireless charging efficiency according to the rotation angle of the first coil plate is shown in a graph.

When the first coil plate 210 has an inclination angle θ of 0 degrees (hereinafter referred to as “two-dimensional zero degree”), the inclination angle θ of the two-dimensional structure is 45 degrees (hereinafter referred to as “two-dimensional 45 degrees”). ) And in the case of the inclination angle (θ) 45 degrees (hereinafter referred to as "three-dimensional 45 degrees") of the three-dimensional structure, it is shown in Table 3 by comparing the change in the wireless charging efficiency according to the rotation angle (φ) have.

Angle 2D
45 degrees 3D
45 degrees 2D
0 degrees Angle 2D
45 degrees 3D
45 degrees 2D
0 degrees 0 44.48 59.38 36.12 210 45.87 56.82 36.12 30 44.33 57.87 36.12 240 44.56 51.98 36.12 60 44.64 52.19 36.12 270 44.48 44.64 36.12 90 44.48 44.72 36.12 300 44.25 51.65 36.12 120 44.25 51.98 36.12 330 44.56 56.18 36.12 150 44.56 57.08 36.12 360 44.01 59.52 36.12 180 43.94 59.67 36.12

Referring to Table 3, the wireless charging efficiency was the lowest when the two-dimensional 0 degrees, the next highest was when the two-dimensional 45 degrees, the wireless charging efficiency was the highest when the three-dimensional 45 degrees.

That is, the wireless charging efficiency is 36.12% when the two-dimensional 0 degrees, and about 44% when the two-dimensional 45 degrees. In the case of three-dimensional 45 degrees, the wireless charging efficiency is the highest, and shows a peak that cycles between 0 degrees and 180 degrees.

6 is a state installed in the cup holder of the embodiment of the wireless charging device consisting of a three-dimensional structure coil according to the present invention.

When the wearable device 500 is used for a long time or is carried in a pocket or bag without being used, the battery is almost exhausted or discharged. Can be used again

Therefore, the wireless charging device 100 is further provided in the cup holder 400 of the vehicle to allow the driver or the passenger to place the wearable device 500 so that the battery can be charged while moving in the vehicle.

The first coil plate 210 is installed on the bottom surface of the cup holder 400, and the second coil plate 220 and the third coil plate 230 are disposed on the side of the cup holder 400 so as to face each other. The transmitter 200 is provided with wireless charging through a magnetic field generated by the coil plates 210, 220, 230. That is, the first coil plate 210 becomes the bottom surface of the cup holder 400, and the second coil plate 220 and the third coil plate 230 face each other on the side of the cup holder 400. It enables 'c' shape.

Therefore, it is not necessary to always have a cable for charging to charge the wearable device 500, and when the wearable device 500 is placed in the cup holder 400 when not in use, the vehicle automatically moves while moving Wireless charging is done.

In addition, even if the device is capable of wireless charging without having a separate dedicated cable that can be inserted into each terminal of the wearable device 500, the device can be charged at any time, and the cable for charging will not be cluttered to keep the vehicle comfortable.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

100: wireless charging device 200: transmitter
210: first coil plate 220: second coil plate
230: third coil plate 300: receiver
400: cup holder 500: wearable device

Claims (11)

A transmitter having a plate-shaped first coil plate and a second coil plate and a third coil plate formed at a predetermined angle with respect to both sides of the first coil plate, and having a three-dimensionally disposed coil; And
A plate-shaped receiver disposed in the transmitter inner space; Including,
When a current flows in at least one coil plate among the first to third coil plates provided in the transmitter, power is wirelessly transmitted to the receiver.
The second coil plate and the third coil plate are installed to face each other, so that the transmitter has a 'c' shape as a whole,
The receiver has a three-dimensional structure that is installed inside the transmitter arranged in a 'c' shape,
The receiver is capable of adjusting the inclination angle with respect to the height direction of the first coil plate and the rotation angle with respect to the plane direction of the first coil plate,
The receiver is disposed to have an inclination of 0 degrees to 60 degrees from the height direction of the first coil plate,
The receiver is disposed in a state rotated 0 degrees or 180 degrees with respect to the axis of rotation the axis perpendicular to the plane direction of the first coil plate
Coils are wound around the first to third coil plates a plurality of times, and the first coil plate, the second coil plate, and the third coil plate are formed in a quadrangular shape, and the receiver is formed in a quadrangular shape in which the coil is wound. And
The first coil plate and the receiver are formed in a shape smaller than the size of the second coil plate and the third coil plate,
When the rotation angle of the receiver is 0 degrees and the inclination angle of the receiver is 0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, the first coil plate and the second coil plate The charging efficiency is higher than the charging efficiency of the third coil plate,
As the rotation angle of the receiver is 0 degrees and the inclination angle of the receiver increases from 0 degrees to 90 degrees, the charging efficiency of the first coil plate and the second coil plate is lowered, and the first coil plate and the second coil are lowered. The filling efficiency of the plate becomes wider and wider than the filling efficiency of the third coil plate,
When the rotation angle of the receiver is 180 degrees, and the inclination angle of the receiver is 0 degrees, 15 degrees 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, the charging of the first coil plate and the third coil plate The efficiency is higher than the charging efficiency of the second coil plate,
As the rotation angle of the receiver is 180 degrees and the inclination angle of the receiver increases from 0 degrees to 90 degrees, the charging efficiency of the first coil plate and the third coil plate is gradually different from the charging efficiency of the second coil plate. More,
Wireless charging device having a three-dimensional structure characterized in that the inclination angle of the first coil plate is 45 degrees. delete delete delete delete delete The method of claim 1,
The first coil plate and the receiver has a three-dimensional structure formed in a shape smaller than the size of the second coil plate and the third coil plate. A transmitter having at least three plate-shaped coil plates arranged in a 'c'shape; And a plate-shaped receiver disposed in the transmitter internal space. Includes, when a current flows in at least one coil plate of the coil plate provided in the transmitter, the power is wirelessly transmitted to the receiver, the second coil plate and the third coil plate are installed to face each other, the transmitter is a whole It has a 'c' shape, the receiver is located inside the space formed by the transmitter, and has a three-dimensional structure capable of adjusting the inclination angle in the height direction of the first coil plate and the rotation angle from the plane direction of the first coil plate Lose,
The receiver is disposed to have an inclination of 0 degrees to 60 degrees from the height direction of the first coil plate,
The receiver is disposed in a state rotated 0 degrees or 180 degrees with respect to the axis of rotation the axis perpendicular to the plane of the first coil plate,
Coils are wound around the first to third coil plates a plurality of times, and the first coil plate, the second coil plate, and the third coil plate are formed in a quadrangular shape, and the receiver is formed in a quadrangular shape in which the coil is wound. And
The first coil plate and the receiver are formed in a shape smaller than the size of the second coil plate and the third coil plate,
When the rotation angle of the receiver is 0 degrees and the inclination angle of the receiver is 0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, the first coil plate and the second coil plate The charging efficiency is higher than the charging efficiency of the third coil plate,
As the rotation angle of the receiver is 0 degrees and the inclination angle of the receiver increases from 0 degrees to 90 degrees, the charging efficiency of the first coil plate and the second coil plate is lowered, and the first coil plate and the second coil are lowered. The filling efficiency of the plate becomes wider and wider than the filling efficiency of the third coil plate,
When the rotation angle of the receiver is 180 degrees, and the inclination angle of the receiver is 0 degrees, 15 degrees 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, the charging of the first coil plate and the third coil plate The efficiency is higher than the charging efficiency of the second coil plate,
As the rotation angle of the receiver is 180 degrees and the inclination angle of the receiver increases from 0 degrees to 90 degrees, the charging efficiency of the first coil plate and the third coil plate is gradually different from the charging efficiency of the second coil plate. More,
Wireless charging device having a three-dimensional structure characterized in that the inclination angle of the first coil plate is 45 degrees. delete delete delete

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