WO2017164476A1

WO2017164476A1 - Matrix core for wireless charging and wireless charging system using same

Info

Publication number: WO2017164476A1
Application number: PCT/KR2016/011673
Authority: WO
Inventors: 박정용; 채석병; 이상용
Original assignee: (주)세노텍
Priority date: 2016-03-24
Filing date: 2016-10-18
Publication date: 2017-09-28
Also published as: KR101756677B1

Abstract

The present invention relates to a matrix coil structure and a wireless charging system used in a wireless charging apparatus, in which a core (10) used in the wireless charging apparatus comprises: a core body (11) formed of a square pillar having rounded corners; a coil insertion space (12) having a form of a strip around a center of the core body (11) at an upper end of the core body (11); a blocking wall (13) formed in an outward direction of the coil insertion space (12) and preventing a magnetic field from being emitted; and a coil (21) coupled in an upper end direction of the core body (11). As such, a wireless charging receiver may stably supply an electric power even if the wireless charging receiver moves while being placed in a wireless charging transmitter, and there is an effect that a reduction of the power efficiency due to a magnetic field collision among cores is prevented by the blocking wall of the core body.

Description

Matrix Core for Wireless Charging and Wireless Charging System Using the Same

The present invention relates to a core and a wireless charging system used in a wireless charging device, and more particularly, even if the receiver position changes through the core and the wireless charging system arranged in a matrix form automatically tracked according to the position of the core The present invention relates to a matrix core for wireless charging and a wireless charging system using the same for improving wireless charging efficiency.

In general, portable electronic devices such as mobile communication terminals and PDAs are equipped with a battery having a rechargeable secondary battery to supply power. In this case, in order to charge the secondary battery, a separate charging device for supplying a portable electronic device by adjusting the home commercial power to an appropriate voltage is required. In general, the charging device and the battery are provided with separate contact terminals, respectively, so as to electrically connect the charging device and the battery by connecting the two contact terminals with each other.

However, when the contact terminal protrudes to the outside as described above, there is a problem in that the contact terminal is not good and the contact terminal is contaminated with external foreign matters so that the contact state is easily poor. In addition, when the battery is inadvertently shorted or exposed to moisture, the charging energy may be easily lost.

Conventional technology for solving such a problem is Korea Patent No. 10-0792308 (contactless charging device having a coil array, a contactless charging system and a charging method, hereinafter referred to as "prior art").

The prior art is a device that is magnetically coupled to a battery device having a built-in receiver coil to charge a battery in a non-contact manner, which device arranges a plurality of transmit coils to induce charging power to the receive coil. Transmission coil array; Means for detecting a transmission coil magnetically coupled to the receiving coil, and selectively driving only the detected transmission coils, wherein the driving means selects only a transmission coil having a feedback response from the battery device. And determining whether there is a feedback response from the battery device within a predetermined time while sequentially driving the transmission coils of the transmission coil array, and selecting only a transmission coil having a feedback response from the battery device within the predetermined time. It relates to a charging device.

As in the prior art, the wireless charger has become the exterior of consumers due to the problem of being charged only when it is matched in the correct position, and a problem for overcoming this needs to be developed.

In addition, in order to solve the problem that the wireless chargers must be aligned, the hardware of the array antenna and the matrix structure of the charging antenna is developed, the firmware algorithm for the positioning and the charge switching through the communication with the receiver, and the small antenna suitable for the matrix structure An array needs to be developed.

The present invention has been made to solve the problems described above, the present invention is a wireless charging matrix core for increasing the wireless charging efficiency by automatically tracking according to the position of the core even if the position change in the wireless charging device and wireless using the same The purpose is to provide a charging system.

In addition, the present invention provides an array of charging antennas for matching the position of the wireless chargers and the core of the matrix structure, the matrix core for wireless charging for implementing the position tracking and charging switching through communication with the receiver and a wireless charging system using the same Its purpose is to.

In order to achieve the above object, the core of the present invention,

A core body 11 formed at a corner of a rounded rectangular pillar, an upper end portion of the core body 11 as a center of the core body 11, a coil insertion space 12 having a band shape, and the coil insertion space 12 It is formed in the outer direction of the matrix core is configured to include a barrier wall 13 for preventing the magnetic field is emitted and the coil 21 is coupled in the upper direction of the core body (11).

In this case, the core 10 is formed of a manganese (Mn) -based material that blocks electromagnetic waves in the low frequency band to prevent the magnetic field generated from the coil 21 inserted into the coil insertion space 12 to be emitted to the side. do.

In addition, the core body 11 has a coil extension space 14 connected to the coil insertion space 12 and the external space in a horizontal direction is formed can be extended to the coil 21 coupled to the core body 11 So that it is formed.

In addition, the matrix core is formed of a core 10 having one or more matrices and an array coil portion (not shown) coupled to the core 10 and extending in a matrix.

In addition, the core 10 and the array coil portion (not shown) are arranged in a rectangular shape of N * M shape, the array coil portion (not shown) in the column direction at the end of the core 10 connected in a row direction Connected.

Wireless charging system using the matrix core of the present invention, a coil for transmitting power in an inductive coupling method, a wireless transmission module for wirelessly transmitting power, a wireless reception module including a rechargeable battery that controls the charge and discharge of the battery, In the wireless charging system using a matrix core, the wireless transmission module is coupled to the core arranged in a matrix structure for transmitting one or more transmission coils, the wireless reception module of the one or more transmission coils and magnetic It comprises a coil selection unit for selecting a transmission coil coupled to the.

At this time, the wireless receiving module is magnetically coupled to the transmission coil and receives a charging power, a rectifier for receiving an AC current of charging power from the receiving coil and converting it into a DC current, the rectifier to DC current through the rectifier It receives and stores the converted charging power, and comprises a power storage for providing the necessary power to the stored charging power to the electronics and a power control unit for controlling the input / output of the charging power input to the power storage.

In addition, the wireless transmission module transfers the charging power to the transmission coil, converts the DC current to convert the AC current, PWM signal generator for pulse width modulation of the AC current converted through the power driver, input A rectifier converts an AC current into a DC current and transmits a DC current to the power driver and the PWM signal generator, an AC power supply unit for supplying an AC current to the rectifier, and a coil selector, a power driver, and a PWM signal generator. It is configured to include a control unit.

Here, the coil selector is characterized in that the transmission coil that is not magnetically coupled with the receiving coil does not provide charging power.

With such a configuration, the wireless charging matrix core of the present invention and the wireless charging system using the same are completed.

Accordingly, using the matrix core for wireless charging of the present invention and the wireless charging system using the same, there is an effect that can be stably supplied power even if the wireless charging receiver moves in a state arranged in the wireless charging transmitter.

In addition, the present invention has the effect of preventing the magnetic field between the core to collide through the barrier wall of the core body to reduce the power efficiency.

In addition, the present invention can improve the reliability of the wireless charging system including a wireless charging receiver and a wireless charging transmitter, and can improve the competitiveness for related products such as portable terminals, battery packs and power tools, etc. have.

1 is a view showing the structure of the core of the present invention.

2 is a diagram showing a matrix core of the present invention.

3 is a view showing a coupling relationship between a core and a coil.

4 is a cross-sectional view of the combined state of the core and the coil of the present invention.

5 is an exemplary view showing magnetic field diffusion of the core of the present invention.

Figure 6 is a block diagram showing a wireless charging system using a matrix core according to an embodiment of the present invention.

7 is a diagram illustrating a switching circuit according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

An object of the present invention is to provide a wireless charging matrix core and a wireless charging system using the same to automatically track the position of the core in the wireless charging device to increase the wireless charging efficiency by automatically tracking according to the position of the core.

1 is a view showing the structure of the core of the present invention, Figure 2 is a view showing a matrix core of the present invention, Figure 3 is a view showing a coupling relationship between the core and the coil, Figure 4 is a core and coil of the present invention Is a view showing a cross-sectional view of the combined state, Figure 5 is an exemplary view showing the magnetic field diffusion of the core of the present invention.

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

The wireless charging device matrix core of the present invention is interposed with a coil 21 of the spring form to express a magnetic field, the core 10 formed to surround the outer side of the coil and the top is open; consists of a magnetic field of the coil It is a technical feature to transmit and receive the charging power of the wireless charging device is concentrated in the direction.

Referring to Figures 1 to 5, the present invention in the core of the wireless charging device, the core is a core body formed of a square pillar of round corners, and the upper portion of the core body to the core body A coil-shaped coil inserting space is formed, and a barrier wall for preventing a magnetic field from being emitted outward of the coil inserting space and a coil coupled to an upper direction of the core body are configured.

The coil may be formed in the form of a spring coil, which is not limited to the type of coil.

In addition, the core is formed by further forming a core pillar in which the coil is mounted in the inner direction of the strip-shaped coil insertion space.

In the spring coil, a cylindrical inner space is created, and a core pillar for mounting it is formed.

Here, the core body is preferably formed of a manganese (Mn) -based material that blocks electromagnetic waves in the low frequency band to prevent the magnetic field generated from the coil inserted into the coil insertion space to be emitted to the side.

In addition, the core body is formed with a coil extension space connecting the coil insertion space and the external space in a horizontal direction, the coil extension space is formed so that the coil coupled to the core body can be extended.

At this time, the array coil unit is to say that each coil is formed extending in a state coupled to the core, which will be known to those skilled in the art.

The core 10 and the array coil portion (not shown) are arranged in a rectangular shape of N * M shape, the array coil portion (not shown) is connected in the column direction at the end of the core 10 connected in a row direction .

Here, although the number of cores and array coils is shown in the drawings, a matrix core having a 4 * 4 shape is not limited thereto.

6 is a block diagram showing a wireless charging system using a matrix core according to an embodiment of the present invention, Figure 7 is a view showing a switching circuit according to an embodiment of the present invention.

6 to 7, the wireless charging system using the matrix core of the present invention, a coil for transmitting power in an inductive coupling method, a wireless transmission module for wirelessly transmitting power, and controls the charge and discharge of the battery And a wireless receiving module including a rechargeable battery, wherein in the wireless charging system using a matrix core, the wireless transmitting module is coupled to a core arranged in a matrix structure to transmit charging power; It comprises a coil selection unit for selecting a transmission coil magnetically coupled with the wireless receiving module of the one or more transmission coils.

Here, the power storage unit may be formed of a rechargeable battery in the form of a battery cell, and may be electrically connected to a charging circuit to charge electrical energy.

As described above, the best embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

The coil 21 of the spring form to express the magnetic field is interpolated, the core 10 is formed to surround the outer side of the coil and the upper end is opened; the magnetic field of the coil is concentrated in the upper direction to charge the wireless charging device. Matrix core for wireless charging, characterized in that for transmitting and receiving power.
The method of claim 1,

The core 10 has a core body 11 formed of a square pillar having a rounded corner;

An upper end portion of the core body 11 and a coil insertion space 12 having a band shape as a center of the core body 11;

A blocking wall 13 formed in an outer direction of the coil insertion space 12 to prevent a magnetic field from being emitted; And

Matrix core for wireless charging, characterized in that it comprises a; coil 21 is coupled in the upper direction of the core body (11).
The method of claim 2,

The core 10 is formed of a manganese (Mn) -based material that blocks electromagnetic waves in a low frequency band for preventing the magnetic field generated from the coil 21 inserted into the coil insertion space 12 from being emitted to the side. A matrix core for wireless charging.
The method of claim 2,

The core body 11 is formed such that the coil insertion space 12 and the outer space connected to the coil space 12 is formed in the horizontal direction so that the coil 21 coupled to the core body 11 can be extended. Matrix core for wireless charging, characterized in that.
The method of claim 4, wherein

The matrix core for wireless charging,

A core 10 formed of at least one matrix;

An array coil unit (not shown) coupled to the core 10 and extending in a matrix form; and a matrix core for wireless charging.
The method of claim 5,

The core 10 and the array coil unit (not shown) are arranged in a rectangular shape of N * M shape, the array coil unit (not shown) is connected in the column direction at the end of the core 10 connected in a row direction Matrix core for wireless charging, characterized in that.
A coil for transmitting power in an inductive coupling method, a wireless transmission module 100 for wirelessly transmitting power, a wireless reception module 200 that controls charging and discharging of a battery and includes a rechargeable battery, and includes a matrix core. In the wireless charging system using,

The wireless transmission module 100 is coupled to a core arranged in a matrix structure for transmitting one or more transmission coils 110;

And a coil selector (120) for selecting a transmission coil (110) magnetically coupled with the wireless reception module (200) of the one or more transmission coils (110).
The method of claim 7, wherein

The wireless receiving module 200 includes a receiving coil 210 magnetically coupled with the transmitting coil 110 to receive charging power;

Rectifier 220 for receiving an AC current of the charging power from the receiving coil 210 to convert to a DC current;

The rectifier 220 receives and stores the charging power converted into a DC current, and the charging power input to the power storage unit 230 and the power storage unit 230 to provide the necessary power to the electronic device stored charge power Wireless charging system, characterized in that it comprises a power control unit 240 for controlling the input / output of the power.
The method of claim 8,

The wireless transmission module 100 transmits charging power to the transmission coil 110, and converts the DC current to the power drive unit 140 for converting the AC current;

A PWM signal generator 150 for pulse width modulating the AC current converted through the power driver 140;

A rectifier 160 converting an input AC current into a DC current and transmitting a DC current to the power driver 140 and the PWM signal generator 150;

An AC power supply unit 170 supplying an AC current to the rectifier 160; And a control unit (130) for controlling the coil selection unit (120), the power driving unit (140), and the PWM signal generator unit (150).
The method of claim 9,

The coil selector 120 is a wireless charging system, characterized in that the transmission coil 110 is not magnetically coupled with the receiving coil 220 does not provide charging power.