KR101969508B1 - Wireless Charging Device with Single Wire Broadband Charging Coil - Google Patents

Abstract

The present invention relates to a single wire broadband charging coil which is designed to design a coil capable of forming multiple magnetic flux loops with a single wire to expand a charging (operation) region A first aspect of the present invention is a wireless charging apparatus comprising: a first region for wirelessly charging a first charged terminal by winding a first coil from a first side to a second side; And a second coil formed by extending the first coil is wound on the plane from the inner side to the outer side by a predetermined winding wire so as to overlap the upper side or the lower side of one side of the first region, And a second area for wirelessly charging the battery.

Description

Technical Field [0001] The present invention relates to a wireless charging device including a single wire broadband charging coil,

The present invention relates to a wireless charging device including a single-wire broadband charging coil, and more particularly, to a charging device in which a coil capable of forming multiple magnetic flux loops with a single wire is designed, And more particularly to a wireless charging device including a single-wire broadband charging coil implemented to extend an area.

Wireless charging technology is a power transmission system that converts electrical energy into electromagnetic waves that can be transmitted wirelessly, and is a technology that can charge various electric and electronic devices equipped with a battery without connecting a power cable.

Depending on the implementation method, it can be broadly classified into an electromagnetic inductive coupling method, an electromagnetic radiation method, a resonant magnetic coupling method, and an electromagnetic wave method. Among them, 'electromagnetic induction method', which is commercialized and standardized, and 'magnetic resonance method,' which is preparing for commercialization and standardization, are receiving the most attention in the industry.

Korean Patent No. 10-1450115 (Apr. 10, 2014) discloses a power receiving coil module for wireless charging capable of using a coil part having various frequency characteristics without changing the control part while enhancing the wireless charging efficiency The shielding sheet is mounted on the shielding sheet and the shielding sheet is disposed around the shielding core. Thus, the shielding sheet is disposed around the shielding core, Distortion of the electromagnetic field generated between the module and the coil part is blocked, and the charging efficiency can be improved. According to the disclosed technology, in a power receiving coil module for wirelessly charging a portable terminal using electromagnetic induction with a power transmission module of a power charging system, an induced electromotive force is generated by the power transmission module, ; A lead portion extending from both ends of the coil portion and connected to a circuit portion for rectifying and controlling an induced current caused by the induced electromotive force and having a capacitor matched with the coil portion at a resonant frequency; A shield core for mounting the coil part therein; And a shield sheet formed on a front surface thereof for mounting the shield core and shielding the distortion of an electromagnetic field generated between the transmission module and the coil. Wherein the shield core comprises a first member mounted on the mounting groove and a second member disposed on the front surface of the first member and having the coil portion disposed between the first member and the first member .

Korean Patent No. 10-1276650 (Jun. 23, 2013) discloses a wireless charging mode in which a first loop part used for wireless charging and a second loop part used for wireless charging and antenna are connected to each other, It is possible to satisfy the required inductance value, thereby enabling the wireless charging to be performed through the wireless charging dual antenna device. In the antenna mode, by separating the first loop part and the second loop part and using only the second loop part as an antenna, it is possible to satisfy the inductance value required for the antenna, so that the wireless- . In this case, since it is possible to use both the wireless charging and the antenna through the single wireless charging dual antenna device, there is no need to separately implement the wireless charging coil and the antenna, and the wireless charging dual antenna device . According to the disclosed technique, a first loop part used for wireless charging; A second loop part used for wireless charging and antenna, the second loop part being formed such that the length of the first loop part and the combined length satisfy the inductance value required for the wireless charging coil; And electrically connecting the first loop unit and the second loop unit when the operation mode of the wireless device is the wireless charging mode, and when the operation mode of the wireless device is the antenna mode, connecting the first loop unit and the second loop unit And an operation mode conversion unit for electrically separating the operation mode conversion unit.

Coil applied to the conventional wireless charger as described above has a disadvantage in that a plurality of coils are required to be arrayed in order to widen the charging area by forming a single magnetic field flux loop in a single coil.

Coil applied to the conventional wireless charger as described above has a problem in that a plurality of coils are used so that a circuit for driving a coil also requires multiple components or a high cost circuit design.

Korean Patent No. 10-1450115 Korea Patent No. 10-1276650

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and disadvantages, and it is an object of the present invention to design a coil capable of forming multiple magnetic flux loops with a single wire A wireless charging device including a single-wire broadband charging coil implemented to extend a charging (operation) region is provided.

In order to solve such a problem, according to one aspect of the present invention, there is provided a portable terminal comprising: a first region for wirelessly charging a first charged terminal by winding a first coil from a outside to a predetermined winding position on a plane; And a second coil formed by extending the first coil is wound on the plane from the inner side to the outer side by a predetermined winding wire so as to overlap the upper side or the lower side of one side of the first region, And a second region for wirelessly charging the wireless charging device.

In one embodiment, the first region comprises: a first coil portion formed of a first coil wound on a plane from a first side to a second side; And a first internal space formed in the first coil section and having a predetermined size.

In one embodiment, the first region may be formed of one of four to ten windings, and the thickness may be 0.5 to 1.5 mm.

In one embodiment, the first coil may be formed of 1.0 to 3.0 wt% of Ni, 0.15 to 1.0 wt% of Si, and 96.0 to 98.85 wt% of a copper alloy of tantalum copper.

In one embodiment, the first region may form the first flux loop and the first coil form a first magnetic field around the first coil.

In one embodiment, the second region may cause the second coil to form a second flux loop to form a second magnetic field around the second coil.

In one embodiment, the first coil and the second coil may further comprise a third region forming a third flux loop to form a third magnetic field around the first coil and the second coil .

In one embodiment, the apparatus may further include a current control device for controlling a current intensity or a current direction of a power source supplied to the first area or the second area corresponding to the type and size of the charged terminal.

In one embodiment, the current control device includes: a memory unit for storing a current intensity or a current direction of a power source to be supplied corresponding to a type of a charged terminal for each charged terminal; An input unit for receiving a type of the charged terminal; A control unit for receiving a type of a terminal to be charged from the input unit and reading a current intensity or a current direction of a power source stored in the memory unit and generating a power source control signal corresponding to the read current intensity or current direction; And a power supply unit for supplying power corresponding to the power control signal transmitted from the control unit to the first area or the second area.

According to the present invention, it is possible to design a coil capable of forming multiple magnetic flux loops with a single wire and to expand a charging (operation) region, so that a single wire broadband charging coil It is possible to maximize the user's convenience by maximizing the recognition area and the operation area (charging area) of the electronic device using wireless charging or RF communication at low cost.

1 is a view for explaining a wireless charging apparatus including a single-wire broadband charging coil according to a first embodiment of the present invention.
2 is a view for explaining the first area in Fig.
3 is a view for explaining a wireless charging apparatus including a single-wire broadband charging coil according to a second embodiment of the present invention.
4 is a view for explaining a wireless charging apparatus including a single wire broadband charging coil according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

The terms " first ", " second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include " or " have " are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

A wireless charging apparatus including a single-wire broadband charging coil according to an embodiment of the present invention will now be described in detail with reference to the drawings.

1 is a view for explaining a wireless charging apparatus including a single-wire broadband charging coil according to a first embodiment of the present invention.

Referring to FIG. 1, a wireless charging apparatus including a single-wire broadband charging coil includes a first region 100 and a second region 200.

The first region 100 winds the first coil 1 from the outside to the inside predetermined in a plane to wirelessly charge the first charged terminal.

In one embodiment, the first coil 1 is formed of one of 4 to 10 windings, and may be formed to have a thickness of 0.5 to 1.5 mm (preferably 1.1 mm).

Table 1 shows the charging range according to the number of turns (i.e., winding). As the number of turns increases from 4 to 7, the charging range also increases. However, if the number of turns is larger than 7, a dead zone occurs and the charging efficiency is deteriorated. Therefore, it is preferable that the first coil 1 is formed by seven turns.

In one embodiment, the first coil 1 may be formed of 1.0 to 3.0 wt% of Ni, 0.15 to 1.0 wt% of Si, and 96.0 to 98.85 wt% of a copper alloy of tantalum copper.

In one embodiment, the first coil 1 and the second coil 2 are made of a copper alloy, and include pure copper having elasticity, so that it is preferable that the coil workability is excellent. Copper is a material that has been widely used as a conductive material due to its high electrical conductivity. Due to the rapid development of the electronics industry and the information and communication industry, materials with both high conductivity and high strength are being developed continuously. The material strengthening method using alloying elements has a very high strength, but significantly lowers elongation and electrical conductivity. When the alloy is developed in consideration of only the strength, the elongation rate is decreased and the molding is not easy. Therefore, in the present invention, in order to increase the strength and toughness while minimizing the decrease of the electric conductivity, it is preferable to be formed of a copper alloy for a coil containing 96 wt% or more of conductive pure copper tantalum.

In one embodiment, the first coil 1 and the second coil 2 have a copper composition of 99.9 wt%, a Sn content of 0.002 wt%, a Pb content of 0.017 wt%, a Bi (ppm) < 1 ppm , Fe (ppm) 1 ppm, P 0.02 wt%, and S 0.001 wt%, and more specifically, 1.0 to 3.0 wt% of Ni and 0.15 to 1.0 wt% of Si and a copper alloy do.

The second region 200 is formed so that one side overlaps with the upper side or the lower side of one side of the first region 100 and the second coil 2 formed by extending the first coil 1 is formed on the inner side So that the second charging terminal is charged wirelessly.

The wireless charging apparatus including the single-wire broadband charging coil having the above-described configuration can be used in combination with the wireless charging and the NFC antenna (frequency band of 13.56 MHz), but the present invention is not limited to this, It is possible to use the antenna as an antenna having a band, and it can operate in any one of a wireless charging mode and an antenna mode.

The wireless charging apparatus including the single-wire wide-band charging coil having the above-described structure may be configured such that a plurality of coils are aligned and designed in order to widen the charging area, instead of forming a single magnetic field flux loop by a single coil applied to a conventional wireless charger .

A wireless charging apparatus including a single-wire wide-band charging coil having the above-described configuration uses a coil designing method to form a multi-magnetic flux loop using a single wire, And the total magnetic field flux loops have the same direction, it is possible to design a coil having the same dimension (Dimension).

The wireless charging apparatus including the single-wire wide-band charging coil having the above-described structure is designed to design a coil capable of forming multiple magnetic flux loops with a single wire, ) Area, it is possible to increase user's convenience by maximizing recognition and operation area (charging area) of an electronic device using wireless charging or RF communication at a low cost, It can be applied to all the electronic appliances to which the antenna is applied.

2 is a view for explaining the first area in Fig.

Referring to FIG. 2, the first region 100 includes a first coil portion 110 and a first inner space portion 120.

The first coil portion 110 is formed of a first coil 1 wound on a plane from a side to an inside predetermined in a winding direction.

In one embodiment, the first coil portion 110 is formed with one of four to ten turns of the coil, and may be formed with a thickness of 0.5 to 1.5 mm (preferably 1.1 mm). In one embodiment, As shown in Table 1, the winding portion of the coil portion 110 is preferably formed of 7 pieces.

In one embodiment, the first coil portion 110 may be formed of 1.0 to 3.0 wt% of Ni, 0.15 to 1.0 wt% of Si, and 96.0 to 98.85 wt% of a copper alloy of tantalum copper.

The first inner space portion 120 is formed as a space having a predetermined size inside the first coil portion 110.

In one embodiment, the first inner space portion 120 may be formed to have a width of 20 mm and a length of 25 mm. However, the size of the first internal space 120 is not limited to the size of the first internal space 120, and the size of the coil may be changed according to other reasons such as the charging power is increased to 5W, 15W or 60W.

The first region 100 as described above can be applied to the second region 200. [ Accordingly, the second region 200 may include the second coil portion 210 and the second inner space portion 220.

The second coil portion 210 is formed of a second coil 2 wound with a prescribed winding on the plane from the inside to the outside (i.e., in the direction opposite to the first coil portion 110).

In one embodiment, the second coil part 210 may be extended from the first coil part 110 and extended by welding or the like at the end of the first coil part 110.

In one embodiment, the second coil portion 210 is formed with one of the number of windings of 4 to 10 and may be formed with a thickness of 0.5 to 1.5 mm (preferably 1.1 mm). In one embodiment, As shown in Table 1, the winding portion of the coil portion 210 is preferably formed as 7.

The second internal space portion 220 is formed as a space having a predetermined size inside the second coil portion 210.

In one embodiment, the second inner space portion 220 may be formed to have a width of 20 mm and a length of 25 mm. However, the size of the second internal space 220 is not limited to the size of the second internal space 220, and the size of the coil may be changed according to other reasons such as the charging power is increased to 5W, 15W or 60W.

3 is a view for explaining a wireless charging apparatus including a single-wire broadband charging coil according to a second embodiment of the present invention.

Referring to FIG. 3, a wireless charging device including a single wire broadband charging coil includes a first region 100, a second region 200, and a third region 300. Here, the first region 100 and the second region 200 are the same as those of FIG. 1, and a description thereof will be omitted.

In one embodiment, the first region 100 is formed such that the first coil 1 forms a first flux loop 10 to form a first magnetic field in and around the first coil 1, A portion where the first flux loop 10 and the second flux loop 20 overlap each other is formed, and a portion where the first flux loop 10 and the second region 200 overlap each other, that is, a portion where the first flux loop 10 and the second flux loop 20 overlap, It may be located on the upper part of the second flux loop 20 or on the lower part of the second flux loop 20. At this time, the first magnetic field formed by the first flux loop 10 is canceled by the second magnetic field formed by the second flux loop 20 and disappears. This is because the direction in which the first magnetic field is formed and the direction in which the second magnetic field is formed are opposite (since the direction of the current flowing in the first coil 1 is opposite to the direction of the current flowing in the second coil 2) Since the intensity of the magnetic field and the intensity of the second magnetic field are the same (since the first coil 1 and the second coil 2 are part of the same coil), they mutually cancel each other and disappear.

In one embodiment, the second region 200 may form a second magnetic field around the second coil 2, with the second coil 2 forming a second flux loop 20.

The third region 300 is formed by forming the third flux loop 30 by the first coil 1 and the second coil 2 to form the third flux loop 30 around the first coil 1 and the second coil 2, Thereby forming a magnetic field. At this time, the magnetic field formed at the overlapping portion of the first coil 1 and the second coil 2, that is, the portion where the first flux loop 10 and the second flux loop 20 overlap, The portion including the first flux loop 10 and the second flux loop 20 excluding the portion where the first flux loop 10 and the second flux loop 20 overlap is formed by forming the third flux loop 30 , The first flux loop 10, or the second flux loop 20, respectively.

4 is a view for explaining a wireless charging apparatus including a single wire broadband charging coil according to a third embodiment of the present invention.

4, a wireless charging device including a single wire broadband charging coil includes a first region 100, a second region 200, a third region 300, and a current control device 400. Here, the first region 100, the second region 200, and the third region 300 are the same as those of FIG. 1, and a description thereof will be omitted.

The current control device 400 controls the current intensity or current direction of the power supplied to the first region 100 or the second region 200 according to the type and size of the charged terminal.

The current control device 400 may include a memory unit 410, an input unit 420, a control unit 430, and a power supply unit 440.

The memory unit 410 stores the current intensity or the current direction of the power source to be supplied according to the type of the terminal to be charged for each of the terminals to be charged. At this time, the reason why the type of the power source is different according to the type of the terminal to be charged is that the charge rated current differs depending on the type of terminal required for wireless charging.

The input unit 420 receives the type of the terminal to be charged and transmits the type of the terminal to be charged to the controller 430.

The control unit 430 receives the type of the terminal to be charged from the input unit 420 and transmits the current intensity or the current direction of the power according to the type of the terminal to be charged to the memory unit 410 Generates the power control signal corresponding to the current intensity or the current direction of the read power source and transmits the generated power source control signal to the power supply unit 440. [

The power supply unit 440 receives the power control signal from the control unit 430 and generates power corresponding to the received power control signal and supplies the generated power to the first area 100 or the second area 200 ).

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented by a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded, And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

1: first coil
2: second coil
10: first flux loop
20: second flux loop
30: Third flux loop
100: first region
110: first coil part
120: first inner space part
200: second region
210: a second coil part
220: second inner space part
300: third region
400: Current control device
410:
420: Input unit
430:
440: Power supply

Claims (9)

A first region for wirelessly charging the first charged terminal by winding a first coil on a plane from a first side to a second side; And a second coil formed by extending the first coil is wound on the plane from the inner side to the outer side by a predetermined winding wire so as to overlap the upper side or the lower side of one side of the first region, Wherein the first region comprises a first coil portion formed of a first coil wound on a plane from a first side to a second side; And a first inner space portion formed in the inner side of the first coil portion, the space having a predetermined size; And a third region forming a third flux loop by the first coil and the second coil to form a third magnetic field around the first coil and the second coil,
The first region being configured such that the first coil forms a first flux loop to form a first magnetic field around the first coil; Wherein the second region is configured such that the second coil forms a second flux loop to form a second magnetic field around the second coil; Further comprising a current control device for controlling a current intensity or a current direction of a power source supplied to the first region or the second region corresponding to the type and size of the charged terminal;
Wherein the first flux loop, the second flux loop, and the third flux loop form a multi-magnetic flux loop of the first flux loop, the second flux loop, and the third flux loop with a single wire, Wherein the charging region is formed so as to have a predetermined width.
delete The apparatus of claim 1,
Wherein the number of windings is one of 4 to 10, and the thickness is 0.5 to 1.5 mm.
2. The magnetic sensor according to claim 1,
Wherein the copper wire is formed of 1.0 to 3.0 wt% of Ni, 0.15 to 1.0 wt% of Si, and 96.0 to 98.85 wt% of a copper alloy of tantalum copper.
delete delete delete delete The apparatus according to claim 1,
A memory unit for storing a current intensity or a current direction of a power source to be supplied according to the type of the terminal to be charged, for each terminal to be charged;
An input unit for receiving a type of the charged terminal;
A control unit for receiving a type of a terminal to be charged from the input unit and reading a current intensity or a current direction of a power source stored in the memory unit and generating a power source control signal corresponding to the read current intensity or current direction; And
And a power supply unit for supplying power corresponding to a power control signal transmitted from the control unit to the first area or the second area.

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