KR20190118000A - Wireless charger having wireless communication coil - Google Patents

Abstract

The present invention relates to a wireless charger having a wireless communication coil. The wireless charger comprises: a heat dissipation sheet; a shielding material disposed on the heat dissipation sheet; a wireless charging coil module disposed on the shielding material; and a wireless communication coil disposed on the shielding material and wound a plurality of times in a horizontal direction to surround the wireless charging coil module. The shielding material comprises: a first shielding material disposed on the heat dissipation sheet and supporting the wireless communication coil; and a second shielding material disposed on the first shielding material and supporting the wireless charging coil module. The wireless communication coil may be disposed to be wound a plurality of times horizontally to surround the side of the second shielding material.

Description

Wireless charging device with wireless communication coil {WIRELESS CHARGER HAVING WIRELESS COMMUNICATION COIL}

This embodiment relates to a wireless charging device having a wireless communication coil.

Portable terminals such as mobile phones and laptops include a battery that stores power and circuits for charging and discharging the battery. In order for the battery of the terminal to be charged, power must be supplied from an external charger.

In general, as an example of an electrical connection method between a charging device and a battery for charging power to a battery, the terminal is supplied with commercial power and converted into a voltage and a current corresponding to the battery to supply electrical energy to the battery through the terminal of the battery. Supply method. This terminal supply method is accompanied by the use of a physical cable (cable) or wire. Therefore, when handling a lot of terminal supply equipment, many cables occupy considerable working space, are difficult to organize, and are not good in appearance. In addition, the terminal supply method may cause problems such as instantaneous discharge phenomenon due to different potential difference between the terminals, burnout and fire caused by foreign substances, natural discharge, deterioration of battery life and performance.

Recently, in order to solve such a problem, a charging system (hereinafter referred to as "" wireless charging system ") and a control method using a method of transmitting power wirelessly have been proposed. In addition, since the wireless charging system was not pre-installed in some portable terminals in the past and the consumer had to separately purchase a wireless charging receiver accessory, the demand for the wireless charging system was low, but the number of wireless charging users is expected to increase rapidly. It is expected to be equipped with wireless charging function.

In general, the wireless charging system includes a wireless power transmitter for supplying electrical energy through a wireless power transmission method and a wireless power receiver for charging the battery by receiving the electrical energy supplied from the wireless power transmitter.

In addition, due to the development of mobile communication and information processing technology, portable terminals provide various wireless Internet services such as content services as well as video calls. The portable terminal is applying NFC (Near Field Communication) technology to provide the above-described service. NFC technology is a contactless short-range wireless communication using a frequency band of 13.56MHz, means a communication technology for transmitting data bidirectionally between terminals within a close distance of less than 10cm.

In addition, in recent years, in order to increase user convenience, the design technology of the wireless charging device has been developed in such a manner that simultaneously providing the above-described NFC function to the wireless communication coil with a wireless charging coil having a wireless charging function.

The present embodiment is designed to solve the problems of the prior art, an object of the present embodiment is to provide a wireless charging device having a wireless communication coil.

The present invention also provides a wireless charging device having a wireless communication coil capable of wireless communication and wireless charging.

The present embodiment is devised to solve the problems of the prior art, and an object of the present embodiment is to provide a wireless charging device having a wireless communication coil.

In addition, the present example provides a wireless charging apparatus having a wireless communication coil capable of wireless communication and wireless charging.

In addition, the present embodiment is to provide a wireless charging device having a miniaturized wireless communication coil.

In addition, the present embodiment is to improve the wireless charging device having a simple wireless communication coil structure.

In addition, the present embodiment is to provide a wireless charging device having a wireless communication coil with a simplified manufacturing process.

In addition, the present embodiment is to provide a wireless charging device having a wireless communication coil to reduce the manufacturing cost.

In addition, the present embodiment is to provide a wireless charging device having a wireless communication coil with improved heat dissipation.

In addition, the present embodiment is to provide a wireless charging device having a wireless communication coil having a high recognition rate while having fairness and reliability.

The technical problems to be achieved in the present embodiment are not limited to the technical problems mentioned above, and other technical problems not mentioned above are clearly understood by those skilled in the art to which the present embodiment belongs from the following description. Could be.

Referring to the effect on the wireless charging device having a wireless communication coil according to the embodiment as follows.

The wireless charging device with a wireless communication coil according to the present embodiment can simplify the manufacturing process according to the configuration of the wireless communication coil.

In addition, the spiral configuration of the wireless communication coil can maximize the efficiency of wireless communication and wireless charging.

In addition, by configuring the wireless communication coil in a helical form, it is possible to maximize the efficiency for wireless communication and wireless charging.

In addition, the wireless charging device with a wireless communication coil according to the present embodiment can improve the heating effect and shielding effect.

In addition, the wireless charging device having a wireless communication coil according to the present embodiment can be made to maintain a good recognition rate while reducing the manufacturing cost.

In addition, the wireless charging device having a wireless communication coil according to the present embodiment may have an effect of having an excellent inductance value while reducing the resistance value of the coil.

In addition, the wireless charging device having a wireless communication coil according to the present embodiment implements a wireless charging coil and a wireless communication coil on the heat dissipation sheet, thereby reducing manufacturing costs, simplifying the manufacturing process, and compact and thin wireless charging It can have the effect of implementing the device.

Effects obtained in the present embodiment are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to facilitate understanding of the present invention, and provide embodiments of the present invention together with the detailed description. However, the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a block diagram illustrating a wireless charging system according to an embodiment.
2 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
3 is an exploded perspective view of a wireless charging device in which a wireless communication coil is configured in a spiral form according to an embodiment.
4 is a perspective view of the wireless charging device shown in FIG.
5 is a rear perspective view of the wireless charging device according to the embodiment.
6 is a side view illustrating a cross section taken along line AA ′ of the wireless charging device illustrated in FIG. 4.
7 is a side view illustrating a cross section taken along line B-B 'of the wireless charging device shown in FIG.
8 is an exploded perspective view of a wireless charging device according to another embodiment.
9 is a perspective view of the wireless charging device shown in FIG.
FIG. 10 is a side view illustrating a cross section taken along line AA ′ of the wireless charging device illustrated in FIG. 9.
FIG. 11 is a side view illustrating a cross section taken along line B-B 'of the wireless charging device shown in FIG. 9.
12 is a side view illustrating a cross section taken along line CC ′ of the wireless charging device illustrated in FIG. 9.
13 is an exploded perspective view of a wireless charging device according to another embodiment.
14 is a perspective view of the wireless charging device shown in FIG.
FIG. 15 is a side view illustrating a cross section taken along line AA ′ of the wireless charging device illustrated in FIG. 14.
16 is a side view illustrating a cross section taken along line B-B 'of the wireless charging device shown in FIG.
FIG. 17 is a side view illustrating a cross section taken along line CC ′ of the wireless charging device illustrated in FIG. 14.
18 is an exploded perspective view of a wireless charging device according to another embodiment.
19 is a perspective view of the wireless charging device shown in FIG.
20 is a side view illustrating a cross section taken along line AA ′ of the wireless charging device of FIG. 18.
FIG. 21 is a side view illustrating a cross section taken along line B-B 'of the wireless charging device shown in FIG.
22 is an exploded perspective view of a wireless charging device according to another embodiment.
FIG. 23 is a perspective view of the wireless charging device shown in FIG. 22.
24 is a side view illustrating a cross section taken along line AA ′ of the wireless charging device illustrated in FIG. 23.
FIG. 25 is a side view illustrating a cross section taken along line B-B 'of the wireless charging device shown in FIG. 24.
26 is an exploded perspective view of a wireless charging device according to another embodiment.
27 is a perspective view of the wireless charging device shown in FIG.
FIG. 28 is a side view illustrating a cross section taken along line AA ′ of the wireless charging device illustrated in FIG. 27.
FIG. 29 is a side view illustrating a cross section taken along line B-B 'of the wireless charging device shown in FIG. 27.
30 is a side view illustrating a cross section taken along line CC ′ of the wireless charging device illustrated in FIG. 27.

Hereinafter, an apparatus and various methods to which the embodiments are applied will be described in more detail with reference to the accompanying drawings. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other.

In the foregoing description, the present invention is not necessarily limited to these embodiments, although all of the components constituting the embodiments are described as being combined or operating in combination. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, although all of the components may be implemented as one independent hardware, each or some of the components of the program modules are selectively combined to perform some or all of the functions combined in one or a plurality of hardware It may be implemented as a computer program having a. Codes and code segments constituting the computer program may be easily inferred by those skilled in the art. Such a computer program may be stored in a computer readable storage medium and read and executed by a computer, thereby implementing the embodiments. The storage medium of the computer program may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.

In the description of the embodiments, in the case of being described as being formed at "up (up) or down (down)", "before (front) or back (back)" of each component, "up (up) or down (Below) " and " before (front) or back (back) " include both formed by direct contact of two components or one or more other components disposed between two components.

In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

In the following description of the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured by those skilled in the art with respect to the related well-known technology, the detailed description thereof will be omitted.

In the description of the embodiment, the apparatus for transmitting wireless power on the wireless power charging system is a wireless power transmitter, wireless power transmitter, wireless power transmitter, wireless power transmitter, transmitter, transmitter, transmitter, transmitting side for convenience of description. A wireless power transmitter, a wireless power transmitter, and a wireless charging device will be used in combination. In addition, as a representation of a device for receiving the wireless power from the wireless power transmitter, for convenience of description, a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a receiver terminal, a receiver, a receiver, a receiver Terminals and the like may be used interchangeably.

Wireless charging apparatus according to the embodiment may be configured in the form of a pad, a cradle, an access point (AP), a small base station, a stand, a ceiling buried, a wall, etc., one transmitter receives a plurality of wireless power It may also transmit power to the device.

For example, the wireless power transmitter may not only be used on a desk or a table, but also may be developed and applied to an automobile and used in a vehicle. The wireless power transmitter installed in the vehicle may be provided in the form of a cradle that can be fixed and mounted simply and stably.

Terminal according to the embodiment is a mobile phone (smart phone), smart phone (smart phone), laptop computer (laptop computer), digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, MP3 player, electric It may be used in small electronic devices such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing bobber, and the like, but is not limited thereto, and is a mobile device device equipped with a wireless power receiver according to an embodiment, which can charge a battery (hereinafter, referred to as “device”). The term "terminal" or "device" may be used interchangeably. The wireless power receiver according to another embodiment may be mounted in a vehicle, an unmanned aerial vehicle, an air drone, or the like.

In general, the wireless power transmitter and the wireless power receiver constituting the wireless power system may exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication. Here, in-band communication and BLE communication may be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, or the like. For example, the wireless power receiver may transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching ON / OFF the current induced through the receiving coil in a predetermined pattern. The information transmitted by the wireless power receiver may include various state information including received power strength information. In this case, the wireless power transmitter may calculate the charging efficiency or the power transmission efficiency based on the received power strength information.

1 is a block diagram illustrating a wireless charging system according to an embodiment.

Referring to FIG. 1, a wireless charging system includes a wireless power transmitter 10 that largely transmits power wirelessly, a wireless power receiver 20 that receives the transmitted power, and an electronic device 30 that receives the received contribution. Can be configured.

For example, the wireless power transmitter 10 and the wireless power receiver 20 may perform in-band communication for exchanging information using the same frequency band as the operating frequency used for wireless power transmission. As another example, the wireless power transmitter 10 and the wireless power receiver 20 may perform out-of-band communication in which information is exchanged using a separate frequency band different from an operating frequency used for wireless power transmission. have.

For example, the information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other. Here, the status information and control information exchanged between the transmitting and receiving end will be more clear through the description of the embodiments to be described later.

The in-band communication and the out-of-band communication may provide bidirectional communication, but are not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may provide one-way communication or half-duplex communication.

For example, the unidirectional communication may be the wireless power receiver 20 transmitting information only to the wireless power transmitter 20, but is not limited thereto. The wireless power transmitter 10 may transmit the information to the wireless power receiver 20. It may be to transmit.

In the half-duplex communication method, bidirectional communication between the wireless power receiver 20 and the wireless power transmitter 10 is possible, but at one time, only one device can transmit information.

The wireless power receiver 20 according to the embodiment may obtain various state information of the electronic device 30. For example, the state information of the electronic device 30 may include current power usage information, information for identifying a running application, CPU usage information, battery charge status information, battery output voltage / current information, and the like. If not, information that can be obtained from the electronic device 30 and can be utilized for wireless power control is sufficient.

2 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.

Referring to FIG. 2, the wireless power transmitter 200 includes a power converter 210, a power transmitter 220, a wireless charging communication unit 230, a controller 240, a current sensor 250, and a temperature sensor 260. The storage unit 270 may include a fan 280, a timer 290, a short range communication unit 201, and a wireless communication coil 202. The configuration of the wireless power transmitter 200 is not necessarily required, and may include more or fewer components.

As shown in FIG. 2, the power supply unit 100 may provide supply power. The power supply unit 100 may correspond to a battery built in the wireless power transmitter 200 or may be an external power source. The embodiment is not limited to the shape of the power supply unit 100.

When power is supplied from the power supply unit 100, the power converter 210 may perform a function of converting the power into power of a predetermined intensity.

To this end, the power converter 210 may include a DC / DC converter 211 and an amplifier 212.

The DC / DC converter 211 may perform a function of converting DC power supplied from the power supply unit 100 into DC power having a specific intensity according to a control signal of the controller 240.

The amplifier 212 may adjust the intensity of the DC / DC converted power according to the control signal of the controller 240. For example, the controller 240 may receive the power reception state information or the power control signal of the wireless power receiver through the wireless charging communication unit 230, and the amplifier 212 based on the received power reception state information or the power control signal. The amplification factor of can be adjusted dynamically. For example, the power reception state information may include, but is not limited to, strength information of the rectifier output voltage and strength information of a current applied to the receiving coil. The power control signal may include a signal for requesting power increase, a signal for requesting power reduction, and the like.

The current sensor 250 may measure an input current input to the driver 210. The current sensor 250 may provide the measured input current value to the controller 240. For example, the control unit 240 may adaptively block the power supply from the power supply unit 100 or block the power supply to the amplifier 212 based on the input current value measured by the current sensor 250.

The temperature sensor 260 may measure the internal temperature of the wireless power transmitter 200 and provide the measurement result to the controller 240. In detail, the temperature sensor 260 may include one or more temperature sensors. One or more temperature sensors may be disposed in correspondence with the transmission coil 2230 of the power transmitter 220 to measure the temperature of the transmission coil 223. For example, the controller 240 may adaptively block power supply from the power supply unit 100 or block power from being supplied to the amplifier 212 based on the temperature value measured by the temperature sensor 260. . To this end, the power converter 210 and one side may further include a predetermined power cut-off circuit for cutting off the power supplied from the power supply unit 100 or cutting off the power supplied to the amplifier 212. In another example, the controller 240 may adjust the intensity of power provided to the power transmitter 220 based on the temperature value measured by the temperature sensor 260. Accordingly, the wireless power transmitter according to the embodiment can prevent the internal circuit from being damaged due to overheating.

The power transmitter 220 transmits the power signal output from the power converter 210 to the wireless power receiver. To this end, the power transmitter 220 may include a driver 221, a selector 222, and one or more transmission coils 223.

The driver 221 may generate an AC power signal in which an interference component having a specific frequency is inserted into the DC power signal output from the power converter 210 and transmit the generated AC power signal to the transmission coil 223. In this case, the frequencies of the AC power signals transmitted to the plurality of transmission coils included in the transmission coil 2230 may be the same or different from each other.

The selector 222 may receive an AC power signal having a specific frequency from the driver 221 and transmit the AC power signal to a transmission coil selected from a plurality of transmission coils. Here, the coil selector 222 may transmit the C power signal to the transmission coil selected by the controller 240 according to a predetermined control signal of the controller 240. Here, the coil selector 222 may control the AC power signal to be transmitted to the coil selected by the controller @ 40 according to a predetermined control signal of the controller 240. More specifically, the selector 222 may include a switch (not shown) that connects the LC resonant circuit to the plurality of transmission coils 2230. The selector 222 may be excluded from the power transmitter 220 when the transmitter coil 223 is configured as one transmitter coil.

The transmitting coil 223 may include at least one transmitting coil, and may transmit the AC power signal received from the selector 222 to the receiver through the corresponding transmitting coil. When there are a plurality of transmitting coils, the transmitting coils may be transmitted to the receiver. When there are a plurality of transmitting coils, the transmitting coil 2230 may include first to nth transmitting coils. The selector 222 may be implemented as a switch or a multiplexer to select a “corresponding transmission coil” among a plurality of transmission coils. In addition, the transmitting coil 223 may include one capacitor (not shown) connected in series with the plurality of transmitting coils to implement the LC resonant circuit. One end of the capacitor may be connected to the transmitting coil 223, and the other end thereof may be connected to the driving unit 221. Here, the "corresponding transmission coil" may refer to a transmission coil having a state that can be coupled by an electromagnetic field and a reception coil of a wireless power receiver to which kwrur is provided to receive power wirelessly. According to an embodiment, the control unit 240 dynamically modulates a transmission coil to be used for wireless power transmission among a plurality of transmission coils provided based on a signal strength indicator received in response to a digital ping signal transmitted for each transmission coil. Can be selected.

The controller 240 may control the selector 222 or the multiplexer so that the sensing signals may be sequentially transmitted through the first to nth transmitting coils 2230 during the first sensing signal transmitting procedure. In this case, the controller 240 may identify a time point at which the detection signal is transmitted by using the timer 290. When the detection signal transmission point arrives, the control unit 240 controls the selection unit 222 or the multiplexer to sense the time through the corresponding transmission coil. It can be controlled to send out a signal. For example, the timer 290 may transmit a specific event signal to the controller 240 at a predetermined period during the ping transmission step. When the corresponding event signal is detected, the controller 240 controls the selector 222 or the multiplexer to control the corresponding event signal. The digital ping can be controlled through the transmitting coil.

The modulator 231 may modulate the control signal generated by the controller 240 and transmit the modulated control signal to the driver 2210. Here, the modulation scheme for modulating the control signal is a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a PSK (Phase Shift Keying) modulation scheme, a pulse width modulation scheme, a differential 2 Differential bi-phase modulation may be included, but is not limited thereto.

When the signal received through the transmitter coil is detected, the demodulator 232 may demodulate the detected signal and transmit the demodulated signal to the controller 240. Here, the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for controlling power during wireless power transmission, an end of charge (DOC) indicator, an overvoltage / overcurrent / overheat indicator, and the like. However, the present invention is not limited thereto, and may include various state information for identifying a state of the wireless power receiver.

In addition, the demodulator 232 may identify from which transmission coil the demodulated signal is a signal, and may provide the control unit 240 with a predetermined transmission coil identifier corresponding to the identified transmission coil.

For example, the wireless power transmitter 200 may obtain the signal strength indicator through in-band communication that communicates with the wireless power receiver using the same frequency used for wireless power transmission.

In addition, the wireless power transmitter 200 may transmit wireless power using the transmission coil 223 and may exchange various information with the wireless power receiver through the transmission coil 223. As another example, the wireless power transmitter 200 may further include a separate coil corresponding to each of the transmitting coils, that is, the first to nth transmitting coils, and may be connected to the wireless power receiver using the provided separate coils. Band communication may be performed.

The storage unit 270 is an input current value of the wireless power transmitter according to the charging state of the wireless power receiver, the charging power strength, whether the charging is stopped, the temperature of the wireless power transmitter for charging restart, the time after the charging stop for charging restart, the fan You can save the operation status, fan RPM, etc.

The fan 280 may rotate the motor to cool the wireless power transmitter 200 that is overheated. The fan 280 may be disposed to correspond to a configuration in which the degree of overheating is severe. For example, the fan 280 may be disposed to correspond to the power transmitter 220. More specifically, the fan 280 may be disposed to correspond to the transmission coil 223 of the power transmitter 220. The controller 240 may operate the fan 280 according to the charging state of the wireless power receiver.

The short range communication unit 201 may perform short range bidirectional communication through a frequency band different from a frequency band used for wireless power signal transmission. For example, the near-field bidirectional communication may be Near Field Communication (NFC). NFC is one of Radio Frequency Identification (RFID) technologies, which uses a frequency of 13.56 MGz to exchange various wireless data within a short distance of 10 cm.

The wireless communication coil 202 may transmit / receive a signal used in short-distance bidirectional communication with a wireless power receiver.

3 is an exploded perspective view of a wireless charging device having a wireless communication coil in a spiral form according to an embodiment, FIG. 4 is a perspective view of the wireless charging device shown in FIG. 3, and FIG. 5 is a wireless charging device according to an embodiment. Is the back perspective view. 6 is a side view illustrating a cross section taken along line A-A 'of the wireless charging device of FIG. 4, and FIG. 7 is a cross section taken along line B-B' of the wireless charging device shown in FIG. 4. One side view.

3 to 7, the wireless charging device according to an embodiment may include a heat dissipation sheet 300, a shielding material 400, a wireless communication coil 500 and a wireless charging coil module 600.

The heat dissipation sheet 300 may radiate heat to the outside of the wireless charging device when heat generated from the wireless charging coil module 600 is directly transmitted through the shielding material 400 or through the heat dissipation hole of the shielding material 400. have. The heat dissipation sheet 300 may be made of a material having high thermal conductivity or high thermal emissivity. For example, it may include aluminum. However, the present invention is not limited thereto, and various heat radiation materials may be included or configured.

The heat dissipation sheet 300 may support the shielding material 400, the wireless communication coil 500, and the wireless charging coil module 600. The area of the heat dissipation sheet 300 may be larger than the area of the shielding member 400 disposed above. In addition, the heat dissipation sheet 300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat radiation sheet 300 may be connected to other substrates (not shown) or the case (not shown) by a fastening member (not shown).

In addition, the heat dissipation sheet 300 may include a plurality of pin holes (Ph). Connection pins (Pin) are included in the fin holes Ph to extend from the upper surface of the heat dissipation sheet 300 to the lower surface. Wireless charging coil modules may be electrically connected by the connection pins P1 to P16. In this case, the lower surface 300b of the heat dissipation sheet 300 may include a connection pin supporter (PS) for fixing the connection pins P1 to P16. The connection pin supporter PS allows the plurality of connection pins to be firmly fixed to the heat dissipation sheet 300, and may be disposed on the bottom surface of the heat dissipation sheet 300 in correspondence with the plurality of connection pins P1 to P16. . In addition, the area of the connection pin supporter PS may be larger than the area in which the plurality of connection pins are disposed.

The shielding member 400 may be disposed on the heat dissipation sheet 300. The shielding member 400 and the heat dissipation sheet 300 may be fixed by placing an adhesive or an adhesive member (not shown). The shielding material 400 supports the wireless communication coil 500 and the wireless charging coil module 600 disposed on the upper surface of the shielding material 400, and improves the performance of the wireless communication coil 500 and the wireless charging coil module 600. Can perform a function. In addition, the shielding material 400 may guide the wireless power generated in the wireless charging coil module 600 in the charging direction, and may protect various circuits disposed below from the electromagnetic field. The wireless communication coil module 600 may be disposed on the shielding material 500, and the wireless communication coil 500 may be wound and disposed to surround the wireless communication coil module 600. The size of the shielding member 400 may be formed to the extent that the four directions may protrude to twice or more than the thickness of the wireless communication coil wound in a plane on the shielding member 400.

The wireless communication coil 500 may be disposed to be wound horizontally a plurality of times in a spiral shape to surround the wireless charging coil module 600 on the upper surface of the shielding material 400. Specifically, the wireless communication coil 500 may be formed of a cotton yarn, a Litz wire, an enameled copper wire. The wireless communication coil according to the embodiment has excellent features of fairness and reliability compared to the wireless communication coil pattern formed by printing on the PCB substrate. In addition, the recognition rate can be improved because the resistance is lower than the coil pattern, and the cost is low, it can have a material cost reduction effect. The wireless communication coil 500 may be adhered and fixed by the shielding material 400 and an adhesive or an adhesive member (not shown).

The wireless communication coil 500 is attached and fixed to the side of the shield 400 by an adhesive or an adhesive member (not shown). The wireless communication coil 500 may extend from one side of the shielding member 400 to be wound horizontally to surround the wireless charging coil module 600. Specifically, the wireless communication coil 500 may be formed to be disposed in the outer region of the shielding material 400 in a spiral form on the plane of the shielding material 400. In this case, the wireless communication coil 500 may be spaced apart from the wireless charging coil module 600 by a threshold distance T1. The separation distance T1 may be proportional to the thickness of the wireless communication coil 500. For example, the separation distance T1 may be disposed to be twice the thickness of the wireless communication coil 500 to prevent leakage current.

The wireless communication coil 500 has a thickness T2 of the threshold. For example, the thickness T2 of the wireless communication coil 500 may be 0.5 mm. According to the present embodiment, the wireless communication coil wound around the wireless charging coil module 600 spaced apart from the wireless charging coil module 600 on the upper surface of the shielding material 500 is wound three times (510, 520, 530). Explain. Therefore, according to the present exemplary embodiment, the width T3 of the wireless communication coil wound in a spiral shape on the plane of the shielding material 400 may be 1.5 mm. However, the thickness and the number of turns of the wireless communication coil as described above is not limited and may be configured in various sizes and widths according to the embodiment.

One side and the other side of the wireless communication coil 500 may be connected to the connection pin (P), respectively. Specifically, one side of the wireless communication coil 500 may be soldered and connected between the thirteenth and fourteenth connection pins P13 and P14, and the other side may be soldered and connected between the fifteenth and sixteenth connection pins P15 and P16. Can be.

The wireless charging coil module 600 may include one or more wireless charging coils. When there are a plurality of wireless charging coils, each wireless charging coil may be wound in the same number of turns. The present invention is not limited thereto and may be wound around different turns. In addition, the plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and may have different inductances.

In addition, the plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include first wireless charging coils 610 to third wireless charging coils 630. The second wireless charging coil 620 and the third wireless charging coil 630 may be disposed on the first layer disposed on the same layer. The first wireless charging coil 610 may be disposed on the second layer and disposed on the second wireless charging coil 620 and the third wireless charging coil 630. Therefore, the charging region can be extended to arrange the plurality of wireless charging coils in different layers to efficiently transfer the wireless power. In addition, the distance from which the wireless communication coil 500 is spaced apart from the wireless charging coil module 600 may be based on the wireless charging coil 620 and the third wireless charging coil 630 disposed on the first floor.

Also, the one or more wireless charging coils may include first and second connections through which an AC signal is input or output. The first and second connections may be wires or cables coated with a sheath. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 610 may include a first-first charging coil connector 611 and a second-second charging coil connector 612. The first-first charging coil connection unit 611 may extend to a coil wire disposed outside the first wireless charging coil 610. The 1-2 charging coil connection part 612 may extend from a coil line disposed inside the first wireless charging coil 610. The second wireless charging coil 620 may include a 2-1 charging coil connector 621 and a 2-2 charging coil connector 622. The 2-1 charging coil connection part 621 may extend from a coil line disposed outside the second wireless charging coil 620. The second-2 charging coil connection unit 622 may extend from a coil line disposed inside the second wireless charging coil 620. The third wireless charging coil 630 may include a 3-1 charging coil connector 631 and a 3-2 charging coil connector 632. The 3-1 charging coil connection part 631 may extend from a coil line disposed outside the third wireless charging coil 630. The third-2 charging coil connection part 632 may extend from a coil line disposed inside the third wireless charging coil 630.

In addition, each of the first and second connection lines of the wireless charging coil may be electrically connected through the connection pin (P). More specifically, the first and second connection lines of each of the wireless charging coils may be soldered and connected to each of the plurality of connection pins P. In addition, the first and second connection lines may be connected to the plurality of connection pins in the order in which one or more wireless charging coils are arranged. For example, as illustrated in FIG. 7, when there are a plurality of wireless charging coils, the second wireless charging coil 620, the first wireless charging coil 610, and the third wireless charging coil 630 may be arranged in the order. The second-second charging coil connection part 622 of the second wireless charging coil 620 may be soldered and connected between the first and second connection pins P1 and P2. Also, the 2-1 charging coil connection part 621 may be soldered and connected between the third and fourth connection pins P3 and P4. In addition, the 1-2 charging coil connection unit 612 may be soldered and connected between the fifth and sixth connection pins (P5, P6). In addition, the first-first charging coil connection part 611 may be soldered and connected between the seventh and eighth connection pins P7 and P8. In addition, the third-second charging coil connection part 632 may be soldered and connected between the ninth and tenth connection pins P9 and P10. In addition, the 3-1 charging coil connection part 631 may be soldered and connected between the eleventh and twelfth connection pins P11 and P12. In this case, the charging coil connection parts 611, 612, 621, 622, 631, and 632 connected to the connection pins P are spaced apart from the heat dissipation sheet 300 by a predetermined distance (T4_1, T4_2, and T4_3) when they are connected between the connection pins. , T4_4, T4_5, T4_6, T4_7, and T4_8. Specifically, each of the charging coil connection parts 611, 612, 621, 622, 631, and 632 is soldered to each of the connection pins P to perform a soldering process for electrically connecting the charging coil connection part and the connection pins. . At this time, the soldering jig is used to solder the charging coil connection part and the connecting pin, and the soldering jig is removed. T4_4, T4_5, T4_6, T4_7, and T4_8) are floated and soldered.

As described above, the wireless charging device according to the embodiment constitutes a shielding material. In addition, by winding the wireless communication coil in a spiral manner on the upper surface of the shielding material, the thickness is thin and may have an effective characteristic according to the decrease in the directional resistance and the recognition rate.

Hereinafter, a wireless charging device of an embodiment constituting a plurality of shielding materials will be described in detail with reference to FIGS. 8 to 12.

8 is an exploded perspective view of a wireless charging device according to another embodiment, Figure 9 is a perspective view of the wireless charging device shown in Figure 8, Figure 10 is cut along the line A-A 'of the wireless charging device shown in FIG. 11 is a side view showing a cross section, FIG. 11 is a side view showing a cross section taken along the line B-B 'of the wireless charging device shown in FIG. 9, and FIG. 12 is a C-C of the wireless charging device shown in FIG. It is a side view which shows the cross section cut along side.

8 to 12, a wireless charging device according to another embodiment includes a heat dissipation sheet 300, a first shielding material 700, a wireless communication coil 500, a second shielding material 400, and a wireless charging coil module ( 600).

The heat dissipation sheet 300 may emit heat to the outside of the wireless charging device when heat generated from the wireless charging coil module 600 is transferred through the heat dissipation holes of the shielding materials 400 and 700. The heat dissipation sheet 300 may be made of a material having high thermal conductivity or high thermal emissivity. For example, it may include aluminum. However, the present invention is not limited thereto and may include various heat radiating materials.

The heat dissipation sheet 300 may support the shielding material 400. 700, the wireless communication coil 500, and the wireless charging coil 600. The area of the heat dissipation sheet may be larger than the area of the first shielding material 700 disposed thereon. In addition, the heat dissipation sheet 300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat radiation sheet 300 may be connected to other substrates (not shown) or the case (not shown) by a fastening member (not shown).

In addition, the heat dissipation sheet 300 may include a plurality of pin holes (Ph). Connection pins (Pin) are included in the fin holes Ph to extend from the upper surface of the heat dissipation sheet 300 to the lower surface. Wireless charging coil modules may be electrically connected by the connection pins P1 to P16. In this case, the lower surface 300b of the heat dissipation sheet 300 may include a connection pin supporter (PS) for fixing the connection pins P1 to P16. The connection pin supporter PS allows the plurality of connection pins to be firmly fixed to the heat dissipation sheet 300, and may be disposed on the bottom surface of the heat dissipation sheet 300 in correspondence with the plurality of connection pins P1 to P16. . In addition, the area of the connection pin supporter PS may be larger than the area in which the plurality of connection pins are disposed.

The first shielding member 700 may be disposed on the heat dissipation sheet 300. An adhesive or an adhesive member (not shown) may be disposed and fixed to the first shielding member 700 and the heat dissipation sheet 300. In addition, the first shielding member 700 supports a second shielding member 400 disposed on the first shielding member 700 and performs a function for improving performance of the wireless communication coil 500 and the wireless charging coil module 600. Can be. That is, the upper surface of the first shielding member 700 may support the wireless communication coil 500 formed to surround the side of the second shielding member 400, and may perform a function for improving performance.

The wireless communication coil 500 may be disposed to be wound a plurality of times horizontally to surround the side surface of the second shielding material 400 in a spiral form. In more detail, the wireless communication coil 500 may be formed of a cotton yarn, a Litz wire, an enameled copper wire, or the like. The wireless communication coil according to the embodiment has excellent features of fairness and reliability compared to the wireless communication coil pattern formed by printing on the PCB substrate. In addition, the recognition rate can be improved because the resistance is lower than that of the coil pattern, and the cost can be reduced, thereby reducing the material cost. The wireless communication coil 500 may be bonded and fixed by the first shielding member 700 and the second shielding member 400 with an adhesive or an adhesive member (not shown).

The wireless communication coil 500 extends from one side of the second shielding member 400 to surround the side of the second shielding member 400 on the upper surface of the first shielding member 700 to cover all sides of the second shielding member 400. It may be disposed to be wound horizontally a plurality of times in a spiral form to wrap. Specifically, the wireless communication coil 500 may be formed of a cotton yarn, a Litz wire, an enameled copper wire. The wireless communication coil formed of a material such as cotton yarn, litz wire, and enameled copper wire has a thin thickness, excellent processability and reliability, compared to a wireless communication coil pattern formed by being printed on a PCB board. In addition, the recognition rate can be improved because the resistance is lower than the coil pattern, and the cost is low, it can have a material cost reduction effect.

The wireless communication coil 500 may be attached and fixed to the second shielding member 400 by an adhesive or an adhesive member (not shown). The wireless communication coil 500 has a thickness T2 of the threshold. For example, the thickness T2 of the wireless communication coil 500 may be 0.5 mm. According to the present embodiment, the wireless communication coil wound around the wireless charging coil module 600 while being spaced apart from the wireless charging coil module 600 on the upper surface of the second shielding material is wound three times (510, 520, 530). Let's explain. Therefore, according to the present embodiment, the width T3 of the wireless communication coil wound in a spiral shape on the plane of the second shielding material 700 may be 1.5 mm. However, the thickness and the number of turns of the wireless communication coil as described above is not limited and may be configured in various sizes and widths according to the embodiment.

One side and the other side of the wireless communication coil 500 may be connected to the connection pin (P), respectively. Specifically, one side of the wireless communication coil 500 may be soldered and connected between the thirteenth and fourteenth connection pins P13 and P14, and the other side may be soldered and connected between the fifteenth and sixteenth connection pins P15 and P16. Can be.

The second shielding member 400 is disposed on the first shielding member 700 and supports the wireless charging coil module 600. In detail, the first shielding member 700 may be disposed below the second shielding member 400, and the wireless charging coil module 600 may be disposed above. In this case, the first shielding member 700 and the wireless charging coil module 600 may be fixed to the upper and lower portions of the second shielding member 4400 by an adhesive or an adhesive member (not shown), respectively.

The second shielding member 400 may be disposed on a lower surface of the wireless charging coil module 600 to support the wireless charging coil module 600. For example, when there are a plurality of wireless charging coils constituting the wireless charging coil module 600, the second shielding material 400 may be disposed on the bottom surfaces of the second wireless charging coil 620 and the third wireless charging coil 630. Can be. An adhesive or an adhesive member (not shown) is disposed between the upper surface of the second shielding member 400 and the lower surface of the second wireless charging coil 620 and the third wireless charging coil 630 to form the second shielding member 400 and the second. The wireless charging coil 620 and the third wireless charging coil 630 may be fixed. The second shielding material 400 may guide the wireless power generated by the wireless charging coil module 600 generated in the wireless charging coil module 600 disposed in the upper direction in the charging direction, and various circuits disposed in the lower electromagnetic field. To protect against

The second shielding member 400 may be formed at a critical height T5. The threshold height T5 may be formed to be greater than or equal to the thickness T2 of the wireless communication coil. Specifically, the height T5 of the second shielding member 400 may be formed at least 0.5 mm or more. Preferably, the height T5 of the second shielding member 400 may be formed to be 1 mm or more. However, this is not limited and may vary depending on the thickness of the wireless communication coil or the number of turns.

In addition, the second shielding member 400 may have a cable access part 410 having a recess structure. The cable access part 410 of the second shielding member 400 may secure a space of the charging coil connection part when the charging coil connection part of the wireless charging coil is connected to the connection pin disposed on the heat dissipation sheet.

The wireless charging coil module 600 may include one or more wireless charging coils. When there are a plurality of wireless charging coils, each wireless charging coil may be wound in the same number of turns. The present invention is not limited thereto and may be wound around different turns. In addition, the plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and may have different inductances.

In addition, the plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include first wireless charging coils 610 to third wireless charging coils 630. The second wireless charging coil 620 and the third wireless charging coil 630 may be disposed on the first layer disposed on the same layer. The first wireless charging coil 610 may be disposed on the second layer and disposed on the second wireless charging coil 620 and the third wireless charging coil 630. Therefore, the charging region can be extended to arrange the plurality of wireless charging coils in different layers to efficiently transfer the wireless power.

Also, the one or more wireless charging coils may include first and second connections through which an AC signal is input or output. The first and second connections may be wires or cables coated with a sheath. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 610 may include a first-first charging coil connector 611 and a second-second charging coil connector 612. The first-first charging coil connection unit 611 may extend to a coil wire disposed outside the first wireless charging coil 610. The 1-2 charging coil connection part 612 may extend from a coil line disposed inside the first wireless charging coil 610. The second wireless charging coil 620 may include a 2-1 charging coil connector 621 and a 2-2 charging coil connector 622. The 2-1 charging coil connection part 621 may extend from a coil line disposed outside the second wireless charging coil 620. The second-2 charging coil connection unit 622 may extend from a coil line disposed inside the second wireless charging coil 620. The third wireless charging coil 630 may include a 3-1 charging coil connector 631 and a 3-2 charging coil connector 632. The 3-1 charging coil connection part 631 may extend from a coil line disposed outside the third wireless charging coil 630. The third-2 charging coil connection part 632 may extend from a coil line disposed inside the third wireless charging coil 630.

In addition, each of the first and second connection lines of the wireless charging coil may be disposed extending from each wireless charging coil in the same direction of one side of the wireless charging device. In more detail, the wireless charging coil may be disposed to extend in the direction of the cable access part 410 disposed on one side of the second shielding member 400. For example, the first-first charging coil connection part 611 and the first-second charging coil connection part 612 of the first wireless charging coil 610, and the second-first charging coil connection part of the second wireless charging coil 620. The third shielding coil connection part 631 and the third charging coil connection part 632 of the second and second charging coil connecting parts 622 and 622 and the third wireless charging coil 630 may be formed of a second shielding material ( It may be disposed extending in the direction of the cable access portion 410 disposed on one side of 400. When the soldering process with the connecting pins (P1 to P16) is performed by a part of the first to third to third charging coil connecting parts 611 to 632 to be disposed inside the recess formed by the cable access part 410. Space can be secured, and defect reduction and fairness can be improved.

In addition, each of the first and second connection lines of the wireless charging coil may be electrically connected through the connection pin (P). More specifically, the first and second connection lines of each of the wireless charging coils may be soldered and connected to each of the plurality of connection pins P. In addition, the first and second connection lines may be connected to the plurality of connection pins in the order in which one or more wireless charging coils are arranged. For example, as illustrated in FIG. 7, when there are a plurality of wireless charging coils, the second wireless charging coil 620, the first wireless charging coil 610, and the third wireless charging coil 630 may be arranged in the order. The second-second charging coil connection part 622 of the second wireless charging coil 620 may be soldered and connected between the first and second connection pins P1 and P2. Also, the 2-1 charging coil connection part 621 may be soldered and connected between the third and fourth connection pins P3 and P4. In addition, the 1-2 charging coil connection unit 612 may be soldered and connected between the fifth and sixth connection pins (P5, P6). In addition, the first-first charging coil connection part 611 may be soldered and connected between the seventh and eighth connection pins P7 and P8. In addition, the third-second charging coil connection part 632 may be soldered and connected between the ninth and tenth connection pins P9 and P10. In addition, the 3-1 charging coil connection part 731 may be soldered and connected between the eleventh and twelfth connection pins P11 and P12. In this case, the charging coil connection parts 611, 612, 621, 622, 631, and 632 connected to the respective connection pins P are spaced apart from the heat dissipation sheet 300 by a predetermined distance (T6_1, T6_2, T6_3) when they are connected between the connection pins. , T6_4, T6_5, T6_6, T6_7, and T6_8. Specifically, each of the charging coil connection parts 611, 612, 621, 622, 631, and 632 is soldered to each of the connection pins P to perform a soldering process for electrically connecting the charging coil connection part and the connection pins. . At this time, the soldering jig is used to solder the charging coil connection part and the connecting pin, and the soldering jig is removed. T6_4, T6_5, T6_6, T6_7, and T6_8) are floated and soldered.

The wireless charging device according to another embodiment as described above comprises a first shielding material for the wireless communication coil and a second shielding material for the wireless charging coil. In addition, by winding the wireless communication coil in a spiral form on the second shielding material, it can have an effective characteristic according to the reduction in the directional resistance and the improvement of the recognition rate.

Hereinafter, a wireless charging device according to another embodiment configured by adding a shielding wall to the wireless charging device according to the embodiment will be described in detail with reference to FIGS. 13 to 17.

FIG. 13 is an exploded perspective view of a wireless charging device according to another embodiment, FIG. 14 is a perspective view of the wireless charging device shown in FIG. 13, and FIG. 15 is taken along line AA ′ of the wireless charging device shown in FIG. 14. Fig. 16 is a side view showing a cut section, and Fig. 16 is a side view showing a cut section along B-B 'of the wireless charging device shown in Fig. 14, and Fig. 17 is a C- of the wireless charging device shown in Fig. 14. It is a side view which shows the cross section cut along C '.

13 to 17, another wireless charging device according to another embodiment includes a heat dissipation sheet 300, a first shielding material 700, a wireless communication coil 500, a second shielding material 400, and a wireless charging coil module. 600 may be included.

The heat dissipation sheet 300 may emit heat to the outside of the wireless charging device when heat generated from the wireless charging coil module 600 is transferred through the heat dissipation holes of the shielding materials 400 and 700. The heat dissipation sheet 300 may be made of a material having high thermal conductivity or high thermal emissivity. For example, it may include aluminum. However, the present invention is not limited thereto and may include various heat radiating materials.

The heat dissipation sheet 300 may support the shielding material 400. 700, the wireless communication coil 500, and the wireless charging coil 600. The area of the heat dissipation sheet may be larger than the area of the first shielding material 700 disposed thereon. In addition, the heat dissipation sheet 300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat radiation sheet 300 may be connected to other substrates by fastening members (not shown).

The heat dissipation sheet 300 may support the shielding material 400. 700, the wireless communication coil 500, and the wireless charging coil 600. The area of the heat dissipation sheet may be larger than the area of the first shielding material 900 disposed above. In addition, the heat dissipation sheet 300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat radiation sheet 300 may be connected to other substrates (not shown) or the case (not shown) by a fastening member (not shown).

In addition, the heat dissipation sheet 300 may include a plurality of pin holes (Ph). Connection pins (Pin) are included in the fin holes Ph to extend from the upper surface of the heat dissipation sheet 300 to the lower surface. Wireless charging coil modules may be electrically connected by the connection pins P1 to P16. In this case, the lower surface 300b of the heat dissipation sheet 300 may include a connection pin supporter (PS) for fixing the connection pins P1 to P16. The connection pin supporter PS allows the plurality of connection pins to be firmly fixed to the heat dissipation sheet 300, and may be disposed on the bottom surface of the heat dissipation sheet 300 in correspondence with the plurality of connection pins P1 to P16. . In addition, the area of the connection pin supporter PS may be larger than the area in which the plurality of connection pins are disposed.

The first shielding member 700 may be disposed on the heat dissipation sheet 300. An adhesive or an adhesive member (not shown) may be disposed and fixed to the first shielding member 700 and the heat dissipation sheet 300. In addition, the first shielding member 700 supports the second shielding member 400 disposed on the first shielding member 700 and performs a function for improving performance of the wireless communication coil 500 and the wireless charging coil module 600. can do. That is, the upper surface of the first shielding member 700 may support the wireless communication coil 500 formed to surround the side of the second shielding member 400, and may perform a function for improving performance.

The first shielding member 700 may be formed larger than the size of the second shielding member 400. In more detail, the first shielding member 400 may be formed to the extent that the four directions may protrude to twice or more than the thickness of the wireless communication coil wound to the outside of the second shielding member 700.

In particular, the first shielding material 700 according to another embodiment may include a bottom portion 701 and a shielding wall 702. In detail, the first shielding member 700 may include a bottom portion 701 bonded to the second shielding member 400 and a shielding wall 702 formed to surround the outer region of the first shielding member 700. In this case, the shielding wall 702 may form an open area 710 on one side. The open area 1710 may be formed in a direction and a space in which each coil connection portion of the wireless charging coil may be drawn out. In addition, the open area 710 is not a mandatory configuration and no open area is formed, and the shielding wall 702 may be formed in a closed loop shape. When the open area of the shielding wall 702 does not exist, the bottom portion 701 of the first shielding material 700 may form a connection part through hole (not shown). The connection part through hole may be formed to correspond to the wireless charging coil connection part to penetrate the coil connection part of the wireless charging coil.

The shielding wall 702 may be formed to the height of the second shielding material 400. Specifically, referring to FIG. 16, the height T8 of the shielding wall 702 may extend to the height T4 of the second shielding member 400.

The wireless communication coil 500 extends from one side of the second shielding material 400 to surround the side of the second shielding material 700 in a spiral shape, and a plurality of spiral communication types surrounds each side of the second shielding material 400. It can be arranged to be wound horizontally. In detail, the wireless communication coil 500 may be formed of a cotton yarn, a Litz wire, and an enameled copper wire. The wireless communication coil according to the present embodiment has excellent features of fairness and reliability compared to the wireless communication coil pattern printed on the PCB substrate. In addition, the recognition rate can be improved because the resistance is lower than the coil pattern, and the cost is low, it can have a material cost reduction effect.

The wireless communication coil 500 may be attached and fixed to the second shielding member 400 by an adhesive or an adhesive member (not shown). The wireless communication coil 500 has a thickness T2 of the threshold. For example, the thickness T2 of the wireless communication coil 500 may be 0.5 mm. According to the present embodiment, the wireless communication coil wound around the wireless charging coil module 600 while being spaced apart from the wireless charging coil module 600 on the upper surface of the second shielding material is wound three times (510, 520, 530). Let's explain. Therefore, according to the present embodiment, the width T3 of the wireless communication coil wound in a spiral shape on the plane of the second shielding material 700 may be 1.5 mm. However, the thickness and the number of turns of the wireless communication coil as described above is not limited and may be configured in various sizes and widths according to the embodiment. In addition, the wireless communication coil 500 may be spaced apart from the shielded wall 702 by a threshold distance T7 from the third turned position. That is, the threshold distance T7 of the wireless communication coil 530 and the shielding wall 702 may be spaced apart by twice the thickness T2 of the wireless communication coil 530. That is, the threshold distance T7 may be configured to 1 mm. However, the threshold distance is not limited and may vary according to the thickness or performance and effect of the wireless communication coil.

One side and the other side of the wireless communication coil 500 may be connected to the connection pin (P), respectively. Specifically, one side of the wireless communication coil 500 may be soldered and connected between the thirteenth and fourteenth connection pins P13 and P14, and the other side may be soldered and connected between the fifteenth and sixteenth connection pins P15 and P16. Can be.

The second shielding member 400 is disposed on the first shielding member 700 and supports the wireless charging coil module 600. In detail, the first shielding member 700 may be disposed below the second shielding member 400, and the wireless charging coil module 600 may be disposed above. In this case, the first shielding member 700 and the wireless charging coil module 600 may be fixed to the upper and lower portions of the second shielding member 4400 by an adhesive or an adhesive member (not shown), respectively.

The second shielding member 400 may be disposed on a lower surface of the wireless charging coil module 600 to support the wireless charging coil module 600. For example, when there are a plurality of wireless charging coils constituting the wireless charging coil module 600, the second shielding material 400 may be disposed on the bottom surfaces of the second wireless charging coil 620 and the third wireless charging coil 630. Can be. An adhesive or an adhesive member (not shown) is disposed between the upper surface of the second shielding member 400 and the lower surface of the second wireless charging coil 620 and the third wireless charging coil 630 to form the second shielding member 400 and the second. The wireless charging coil 620 and the third wireless charging coil 630 may be fixed. The second shielding material 400 may guide the wireless power generated by the wireless charging coil module 600 generated in the wireless charging coil module 600 disposed in the upper direction in the charging direction, and various circuits disposed in the lower electromagnetic field. To protect against

The second shielding member 400 may be formed at a critical height T8. The threshold height T8 may be formed to be greater than or equal to the thickness T2 of the wireless communication coil. Specifically, the height T8 of the second shielding member 400 may be formed at least 0.5 mm or more. Preferably, the height T8 of the second shielding member 400 may be formed to be 1 mm or more. However, this is not limited and may vary depending on the thickness of the wireless communication coil or the number of turns.

In addition, the second shielding member 400 may have a cable access part 410 having a recess structure. The cable access part 410 of the second shielding member 400 may secure a space of the charging coil connection part when the charging coil connection part of the wireless charging coil is connected to the connection pin disposed on the heat dissipation sheet.

The wireless charging coil module 600 may include one or more wireless charging coils. When there are a plurality of wireless charging coils, each wireless charging coil may be wound in the same number of turns. The present invention is not limited thereto and may be wound around different turns. In addition, the plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and may have different inductances.

In addition, the plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include first wireless charging coils 610 to third wireless charging coils 630. The second wireless charging coil 620 and the third wireless charging coil 630 may be disposed on the first layer disposed on the same layer. The first wireless charging coil 610 may be disposed on the second layer and disposed on the second wireless charging coil 620 and the third wireless charging coil 630. Therefore, the charging region can be extended to arrange the plurality of wireless charging coils in different layers to efficiently transfer the wireless power.

Also, the one or more wireless charging coils may include first and second connections through which an AC signal is input or output. The first and second connections may be wires or cables coated with a sheath. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 610 may include a first-first charging coil connector 611 and a second-second charging coil connector 612. The first-first charging coil connection unit 611 may extend to a coil wire disposed outside the first wireless charging coil 610. The 1-2 charging coil connection part 612 may extend from a coil line disposed inside the first wireless charging coil 610. The second wireless charging coil 620 may include a 2-1 charging coil connector 621 and a 2-2 charging coil connector 622. The 2-1 charging coil connection part 621 may extend from a coil line disposed outside the second wireless charging coil 620. The second-2 charging coil connection unit 622 may extend from a coil line disposed inside the second wireless charging coil 620. The third wireless charging coil 630 may include a 3-1 charging coil connector 631 and a 3-2 charging coil connector 632. The 3-1 charging coil connection part 631 may extend from a coil line disposed outside the third wireless charging coil 630. The third-2 charging coil connection part 632 may extend from a coil line disposed inside the third wireless charging coil 630.

In addition, each of the first and second connection lines of the wireless charging coil may be disposed extending from each wireless charging coil in the same direction of one side of the wireless charging device. In more detail, the wireless charging coil may be disposed to extend in the direction of the cable access part 410 disposed on one side of the second shielding member 400. For example, the first-first charging coil connection part 611 and the first-second charging coil connection part 612 of the first wireless charging coil 610, and the second-first charging coil connection part of the second wireless charging coil 620. The third shielding coil connection part 631 and the third charging coil connection part 632 of the second and second charging coil connecting parts 622 and 622 and the third wireless charging coil 630 may be formed of a second shielding material ( It may be disposed extending in the direction of the cable access portion 410 disposed on one side of 400. Part of the first-first to third-second charging coil connections 1811 to 1832 is disposed in the recess formed by the cable access part 1720 to solder the connection pins P1 to P24. Space can be secured, and defect reduction and fairness can be improved.

In addition, each of the first and second connection lines of the wireless charging coil may be electrically connected through the connection pin (P). More specifically, the first and second connection lines of each of the wireless charging coils may be soldered and connected to each of the plurality of connection pins P. In addition, the first and second connection lines may be connected to the plurality of connection pins in the order in which one or more wireless charging coils are arranged. For example, as illustrated in FIG. 7, when there are a plurality of wireless charging coils, the second wireless charging coil 620, the first wireless charging coil 610, and the third wireless charging coil 630 may be arranged in the order. The second-second charging coil connection part 622 of the second wireless charging coil 620 may be soldered and connected between the first and second connection pins P1 and P2. Also, the 2-1 charging coil connection part 621 may be soldered and connected between the third and fourth connection pins P3 and P4. In addition, the 1-2 charging coil connection unit 612 may be soldered and connected between the fifth and sixth connection pins (P5, P6). In addition, the first-first charging coil connection part 611 may be soldered and connected between the seventh and eighth connection pins P7 and P8. In addition, the third-second charging coil connection part 632 may be soldered and connected between the ninth and tenth connection pins P8 and P19. In addition, the 3-1 charging coil connection part 731 may be soldered and connected between the eleventh and twelfth connection pins P11 and P12. In this case, the charging coil connection parts 611, 612, 621, 622, 631, and 632 connected to the connection pins P are spaced apart from the heat dissipation sheet 300 by a predetermined distance (T9_1, T9_2, and T9_3) when they are connected between the connection pins. , T9_4, T9_5, T9_6, T9_7, and T9_8. Specifically, each of the charging coil connection parts 611, 612, 621, 622, 631, and 632 is soldered to each of the connection pins P to perform a soldering process for electrically connecting the charging coil connection part and the connection pins. . In this case, the soldering jig is used to solder the charging coil connection part and the connecting pin, and the soldering jig is removed. T9_4, T9_5, T9_6, T9_7, T9_8) are floated and soldered.

As described above, the wireless charging device according to another embodiment constitutes a first shielding material for a wireless communication coil and a second shielding material for a wireless charging coil. In addition, by forming a shielding wall on the first shielding material, and by winding the wireless communication coil in a spiral form on the second shielding material, it can have an effective characteristic according to the lowering of the directional resistance and improved recognition rate.

Hereinafter, a wireless charging device including a wireless communication coil having a different form from the wireless communication coil disclosed in the above embodiment will be described in detail.

18 is an exploded perspective view of a wireless charging device according to another embodiment, FIG. 19 is a perspective view of the wireless charging device shown in FIG. 18, and FIG. 20 is taken along line AA ′ of the wireless charging device shown in FIG. 18. Fig. 21 is a side view showing a cut section, and Fig. 21 is a side view showing a cut section along B-B 'of the wireless charging device shown in Fig. 18.

18 to 21, a wireless charging device according to another embodiment may include a heat dissipation sheet 1300, a shielding material 1400, a wireless communication coil 1500, and a wireless charging coil module 1600.

The heat dissipation sheet 1300 may radiate heat to the outside of the wireless charging device when heat generated from the wireless charging coil module 1600 is directly transmitted through the shielding member 1400 or through a heat dissipation hole of the shielding member 1400. Can be. The heat dissipation sheet 1300 may be made of a material having high thermal conductivity or high thermal emissivity. For example, it may include aluminum. However, the present disclosure is not limited thereto, and may include or configure various heat radiation materials.

The heat dissipation sheet 1300 may support the shielding member 1400, the wireless communication coil 1500, and the wireless charging coil module 1600. The area of the heat dissipation sheet 1300 may be larger than the area of the shielding material 1400 disposed thereon. In addition, the heat dissipation sheet 1300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat dissipation sheet 300 may be connected to other substrates (not shown) or a case (not shown) by a fastening member (not shown).

In addition, the heat dissipation sheet 1300 may include a plurality of pin holes (Ph). Connection pins (Pin) are included in the fin holes Ph to extend from the upper surface of the heat dissipation sheet 300 to the lower surface. Wireless charging coil modules may be electrically connected by the connection pins P1 to P16. In this case, the lower surface 1300b of the heat dissipation sheet 1300 may include a connection pin supporter (PS) for fixing the connection pins P1 to P16. The connection pin supporter PS allows the plurality of connection pins to be firmly fixed to the heat dissipation sheet 1300, and may be disposed on the bottom surface of the heat dissipation sheet 1300 in correspondence with the plurality of connection pins P1 to P16. . In addition, the area of the connection pin supporter PS may be larger than the area in which the plurality of connection pins are disposed.

The shielding material 1400 may be disposed on the heat dissipation sheet 1300. The shielding member 1400 and the heat dissipation sheet 1300 may be fixed by placing an adhesive or an adhesive member (not shown). The shielding material 1400 supports the wireless communication coil 1500 and the wireless charging coil module 1600 disposed on the upper surface of the shielding material 1400, and improves the performance of the wireless communication coil 1500 and the wireless charging coil module 1600. Can perform a function. In addition, the shielding material 1400 may guide the wireless power generated in the wireless charging coil module 1600 in the charging direction, and may protect various circuits disposed below from the electromagnetic field. The wireless communication coil module 600 may be disposed on the shielding material 1500, and the wireless communication coil 1500 may be wound and disposed to surround the wireless communication coil module 600. The size of the shielding material 1400 may be formed to about twice the thickness of the wireless communication coil wound in a plane on the shielding material 1400 and the size of the four directions may protrude.

The wireless communication coil 1500 may be disposed to be wound a plurality of times so as to surround the side surface of the shielding material 1400 in a helical form. The helical form refers to the coils being wound while overlapping in the height (vertical) direction. That is, it refers to a wireless communication coil wound by vertically stacked. Specifically, the wireless communication coil 1500 is a cotton yarn, a Litz wire. It may be formed of an enameled copper wire or the like. The wireless communication coil according to the embodiment has excellent features of fairness and reliability compared to the wireless communication coil pattern formed by printing on the PCB substrate. In addition, the recognition rate can be improved because the resistance is lower than that of the coil pattern, and the cost can be reduced, thereby reducing the material cost.

The wireless communication coil 1500 is attached and fixed to the side of the shielding member 1400 by an adhesive or an adhesive member (not shown). The wireless communication coil 1500 may extend from one side of the shielding member 1400, and may be formed to vertically surround the side surface of the shielding member 1400. In this case, the wireless communication coil 1500 may be formed at positions spaced apart by the thresholds T10 and T11 at the upper and lower portions of the shielding member 1400, respectively. The separation distances T10 and T11 may be proportional to the thickness of the wireless communication coil 1500. The separation distances T10 and T11 may be formed to correspond to the thickness of the wireless communication coil 1500.

The wireless communication coil 1500 has a thickness T12_1 of a threshold value. For example, the thickness T12_1 of the wireless communication coil 1500 may be 0.5 mm. Specifically, the thickness T12_1 of the wireless communication coil 1500 may be formed to vertically stack and surround the side of the shielding member 1400 so that the wireless communication coil having a thickness of 0.5 mm and a thickness of 0.5 mm is wound three times. At this time, the wireless communication coil 1500 is 0.5mm (T10) or more from the top of the shielding material 1400. It may be wound in a position spaced at least 0.5 mm (T11) from the bottom. That is, the first turned wireless communication coil 1510 is formed at a position spaced at least 0.5 mm (T10) from the upper portion of the shield 1400 and is sequentially wound in a downward direction, and the third turned wireless communication coil 1530 is a shielded material. It may be formed at a position spaced more than 0.5m (T12) from the bottom of the (1400). Therefore, the height T13 of the shielding member 1400 may be formed to have at least 2.5mm or more.

Also, in the present embodiment, for example, the wireless communication coil 1500 is wound from the upper portion of the shielding material 1400 to the lower portion, but the present disclosure is not limited thereto. The wireless communication coil 1500 is disposed at the lower portion of the shielding material 1400. It may be formed to be wound to the top.

One side and the other side of the wireless communication coil 1500 may be connected to the connection pin (P), respectively. Specifically, one side of the wireless communication coil 1500 may be soldered and connected between the thirteenth and fourteenth connection pins P13 and P14, and the other side may be soldered and connected between the fifteenth and sixteenth connection pins P15 and P16. Can be.

The wireless charging coil module 1600 may include one or more wireless charging coils. When there are a plurality of wireless charging coils, the wireless charging coils may be wound in the same number of turns. The present invention is not limited thereto and may be wound at different turns. In addition, the plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and may have different inductances.

In addition, the plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include the first wireless charging coil 1610 to the third wireless charging coil 1630. The second wireless charging coil 1620 and the third wireless charging coil 1630 may be disposed on the first layer disposed on the same layer. The first wireless charging coil 1610 may be disposed above the second wireless charging coil 1620 and the third wireless charging coil 1630 and disposed on the second layer. Therefore, the charging region can be extended to arrange the plurality of wireless charging coils in different layers to efficiently transfer the wireless power.

Also, the one or more wireless charging coils may include first and second connections through which an AC signal is input or output. The first and second connections may be wires or cables coated with a sheath. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 1610 may include a first-first charging coil connector 1611 and a second-second charging coil connector 612. The first-first charging coil connection unit 1611 may extend to a coil wire disposed outside the first wireless charging coil 1610. The 1-2 charging coil connection unit 1612 may extend from a coil wire disposed inside the first wireless charging coil 1610. The second wireless charging coil 1620 may include a 2-1 charging coil connector 1641 and a 2-2 charging coil connector 1622. The 2-1 charging coil connection unit 1621 may extend from a coil line disposed outside the second wireless charging coil 1620. The 2-2 charging coil connecting unit 1622 may extend from a coil wire disposed inside the second wireless charging coil 1620. The third wireless charging coil 1630 may include a 3-1 charging coil connection unit 1163 and a 3-2 charging coil connection unit 632. The 3-1 charging coil connection unit 1163 may extend from a coil line disposed outside the third wireless charging coil 1630. The 3-2 charging coil connection unit 1632 may extend from a coil wire disposed inside the third wireless charging coil 1630.

In addition, each of the first and second connection lines of the wireless charging coil may be electrically connected through the connection pin (P). More specifically, the first and second connection lines of each of the wireless charging coils may be soldered and connected to each of the plurality of connection pins P. In addition, the first and second connection lines may be connected to the plurality of connection pins in the order in which one or more wireless charging coils are arranged. For example, as shown in FIG. 7, when there are a plurality of wireless charging coils, the second wireless charging coil 1620, the first wireless charging coil 1610, and the third wireless charging coil 1630 may be arranged in this order. The second-second charging coil connection unit 1622 of the second wireless charging coil 1620 may be soldered and connected between the first and second connection pins P1 and P2. In addition, the 2-1 charging coil connecting portion 1621 may be soldered and connected between the third and fourth connecting pins P3 and P4. In addition, the 1-2 charging coil connection unit 1612 may be soldered and connected between the fifth and sixth connection pins (P5, P6). In addition, the first-first charging coil connection unit 1611 may be soldered and connected between the seventh and eighth connection pins P7 and P8. In addition, the 3-2 charging coil connection unit 1632 may be soldered and connected between the ninth and tenth connection pins (P9, P10). In addition, the 3-1 charging coil connection unit 1163 may be soldered and connected between the eleventh and twelfth connection pins P11 and P12. In this case, the charging coil connection parts 1611, 1612, 1621, 1622, 1631, and 1632 connected to each connection pin P are spaced apart from the heat dissipation sheet 1300 by a predetermined distance (T14_1, T14_2, T14_3) when connected between the connection pins. , T14_4, T14_5, T14_6, T14_7, and T14_8. Specifically, each of the charging coil connection parts 1611, 1612, 1621, 1622, 1631, and 1632 are soldered to each of the connection pins P to perform a soldering process for electrically connecting the charging coil connection part and the connection pins. . In this case, the soldering jig is used to solder the charging coil connection part and the connecting pin, and the soldering jig is removed. T14_4, T14_5, T14_6, T14_7, T14_8) are floated and soldered.

As described above, the wireless charging device according to another embodiment constitutes a single shielding material, and is configured by winding the wireless communication coil in a helical form on the side of the shielding material, thereby having a thin thickness and having an effect of improving directivity, resistance reduction, and recognition rate. Can be.

Hereinafter, a wireless charging device according to an embodiment constituting a plurality of shielding materials will be described in detail with reference to FIGS. 22 to 25.

22 is an exploded perspective view of the wireless charging device according to another embodiment, FIG. 23 is a perspective view of the wireless charging device shown in FIG. 22, and FIG. 24 is taken along line AA ′ of the wireless charging device shown in FIG. 23. 25 is a side view showing a cut section, and FIG. 25 is a side view showing a cut section along BB ′ of the wireless charging device shown in FIG. 24.

22 to 25, the wireless charging device according to another embodiment of the present invention includes a heat dissipation sheet 1300, a first shielding material 1700, a wireless communication coil 1500, a second shielding material 1400, and a wireless charging coil module. (1600).

The heat dissipation sheet 1300 may emit heat to the outside of the wireless charging device when heat generated from the wireless charging coil module 1600 is transferred through the heat dissipation holes of the shielding materials 1400 and 1700. The heat dissipation sheet 300 may be made of a material having high thermal conductivity or high thermal emissivity. For example, it may include aluminum. However, the present invention is not limited thereto and may include various heat radiating materials.

The heat dissipation sheet 300 may support the shielding material 1400. 1700, the wireless communication coil 1500, and the wireless charging coil 1600. The area of the heat dissipation sheet may be larger than the area of the first shielding material 1700 disposed above. In addition, the heat dissipation sheet 1300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat dissipation sheet 1300 may be connected to other substrates (not shown) or the case (not shown) by a fastening member (not shown).

In addition, the heat dissipation sheet 1300 may include a plurality of pin holes (Ph). In each of the pin holes Ph, connecting pins (first to sixteenth) are inserted to extend from an upper surface to a lower surface of the heat dissipation sheet 1300. Wireless charging coil modules may be electrically connected by the connection pins P1 to P16. In this case, the lower surface 300b of the heat dissipation sheet 1300 may include a connection pin supporter (PS) for fixing the connection pins P1 to P16. The connection pin supporter PS allows the plurality of connection pins to be firmly fixed to the heat dissipation sheet 1300, and may be disposed on the bottom surface of the heat dissipation sheet 1300 in correspondence with the plurality of connection pins P1 to P16. . In addition, the area of the connection pin supporter PS may be larger than the area in which the plurality of connection pins are disposed.

The first shielding material 1700 may be disposed on the heat dissipation sheet 1300. An adhesive or an adhesive member (not shown) may be disposed and fixed to the first shielding material 1700 and the heat dissipation sheet 1300. In addition, the first shielding member 1700 may support a second shielding member 1400 disposed on the first shielding member 1700 and perform a function for improving performance of the wireless communication coil 1500 and the wireless charging coil module 1600. Can be. That is, the first shielding member 1700 may perform a function for improving the performance of the wireless communication coil 1500 wound around the second shielding member 1400. That is, the first shielding member 1700 may be formed larger than the size of the second shielding member 1400. In more detail, the first shielding member 1700 may be formed to the extent that the four directions may protrude to twice or more than the thickness of the wireless communication coil wound to the outer surface of the second shielding member 1400.

The wireless communication coil 1500 may be disposed to be wound a plurality of times so as to surround the side surface of the second shielding material 1400 in a helical form. The helical form refers to the coils being wound while overlapping in the height (vertical) direction. That is, it refers to a wireless communication coil wound by vertically stacked. In detail, the wireless communication coil 1500 may be formed of a cotton yarn, a Litz wire, an enameled copper wire, or the like. The wireless communication coil according to the embodiment has excellent features of fairness and reliability compared to the wireless communication coil pattern formed by printing on the PCB substrate. In addition, since it is formed on the side of the second shielding material 1400, a separate PCB substrate is not required, so that the overall thickness of the wireless charger can be reduced. In addition, the recognition rate can be improved because the resistance is lower than the coil pattern, and the cost is low, it can have a material cost reduction effect.

The second shield 1400 is disposed on the first shield 1700 and supports the wireless charging coil module 1600. In detail, the second shielding member 1400 may include a first shielding member 1700 disposed at a lower portion thereof, and a wireless charging coil module 1600 disposed at an upper portion thereof. In this case, the first shielding member 1700 and the wireless charging coil module 1600 may be fixed to the upper and lower portions of the second shielding member 1400 by an adhesive or an adhesive member, respectively.

The second shielding member 1400 may be disposed on a lower surface of the wireless charging coil module 1600 to support the wireless charging coil module 1600. For example, when there are a plurality of wireless charging coils constituting the wireless charging coil module 1600, the second shielding material 1400 may be disposed on the bottom surfaces of the second wireless charging coil 1620 and the third wireless charging coil 1630. have. An adhesive or an adhesive member (not shown) is disposed between the upper surface of the second shielding member 1400 and the lower surface of the second wireless charging coil 1620 and the third wireless charging coil 1630 to form the second shielding member 1400 and the second. And third wireless charging coils 1620 and 1630 may be fixed. The upper portion of the second shielding member 1400 may guide the wireless power generated from the wireless charging coil module 1600 disposed at the upper portion in the charging direction, and may protect various circuits disposed at the lower side from the electromagnetic field.

In addition, the second shielding member 1400 may have a cable access portion 1410 having a recess structure. The cable access part 1410 of the second shielding material 1400 may secure a space of the charging coil connection part when the charging coil connection part of the wireless charging coil is connected to the connection pin disposed on the heat dissipation sheet 300.

As shown in FIG. 24, the second shielding material 1400 may be wound around the wireless communication coil 1500. The second shielding member 1400 and the wireless communication coil 1500 may be fixed by an adhesive or an adhesive member (not shown). In more detail, the wireless communication coil 1500 may be wound N times to surround the side surface of the second shielding material 1400. In the present exemplary embodiment, the wireless communication coil 1500 is formed by winding the second shielding member 1400 three times.

The wireless communication coil 1500 is adhered and fixed to the side of the second shielding member 1400 by an adhesive or an adhesive member (not shown). The wireless communication coil 1500 may extend from one side of the second shielding member 1400, and may be formed to vertically surround a side of the second shielding member 1400. In this case, the wireless communication coil 1500 may be formed at positions spaced apart from the upper and lower portions of the height of the second shielding member 1400 by threshold values T10 and T11, respectively. The separation distances T10 and T11 may be proportional to the thickness of the wireless communication coil 1500. The separation distances T10 and T11 may be formed to correspond to the thickness of the wireless communication coil 1500.

The wireless communication coil 1500 has a thickness T12_1 of a threshold value. For example, the thickness T12_1 of the wireless communication coil 1500 may be 0.5 mm. In detail, the thickness T12_1 of the wireless communication coil 1500 is 0.5 mm, and the side surface of the shielding member 1400 may be vertically laminated and wrapped so that the wireless communication coil having a thickness of 0.5 mm is wound three times. In this case, the wireless communication coil 1500 may be wound at a position spaced at least 0.5 mm (T10) from the top of the shielding member 1400 and at least 0.5 mm (T11) from the bottom. That is, the first turned wireless communication coil 1510 is formed at a position spaced 0.5 mm (T10) or more from the upper portion of the second shielding member 1400, and is sequentially wound in a downward direction and the third turned wireless communication coil 1530. ) May be formed at a position spaced at least 0.5 mm (T12) from the lower portion of the second shielding member 1400. Therefore, the height T13 of the second shielding member 1400 may be formed to have at least 2.5mm or more.

In addition, in the present exemplary embodiment, the wireless communication coil 1500 is wound from the upper portion to the lower portion of the second shielding material 1400. For example, the present invention is not limited thereto, and the wireless communication coil 1500 may include the second shielding material 1400. It may be formed to be wound from the bottom to the top).

One side and the other side of the wireless communication coil 1500 may be connected to the connection pin (P), respectively. Specifically, one side of the wireless communication coil 1500 may be soldered and connected between the thirteenth and fourteenth connection pins P13 and P14, and the other side may be soldered and connected between the fifteenth and sixteenth connection pins P15 and P16. Can be.

The wireless charging coil module 1600 may include one or more wireless charging coils. When there are a plurality of wireless charging coils, the wireless charging coils may be wound in the same number of turns. The present invention is not limited thereto and may be wound at different turns. In addition, the plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and may have different inductances.

In addition, the plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include the first wireless charging coil 1610 to the third wireless charging coil 1630. The second wireless charging coil 1620 and the third wireless charging coil 1630 may be disposed on the first layer disposed on the same layer. The first wireless charging coil 1610 may be disposed above the second wireless charging coil 1620 and the third wireless charging coil 1630 and disposed on the second layer. Therefore, the charging region can be extended to arrange the plurality of wireless charging coils in different layers to efficiently transfer the wireless power.

Also, the one or more wireless charging coils may include first and second connections through which an AC signal is input or output. The first and second connections may be wires or cables coated with a sheath. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 1610 may include a first-first charging coil connector 1611 and a second-second charging coil connector 612. The first-first charging coil connection unit 1611 may extend to a coil wire disposed outside the first wireless charging coil 1610. The 1-2 charging coil connection unit 1612 may extend from a coil wire disposed inside the first wireless charging coil 1610. The second wireless charging coil 1620 may include a 2-1 charging coil connector 1641 and a 2-2 charging coil connector 1622. The 2-1 charging coil connection unit 1621 may extend from a coil line disposed outside the second wireless charging coil 1620. The 2-2 charging coil connecting unit 1622 may extend from a coil wire disposed inside the second wireless charging coil 1620. The third wireless charging coil 1630 may include a 3-1 charging coil connection unit 1163 and a 3-2 charging coil connection unit 632. The 3-1 charging coil connection unit 1163 may extend from a coil line disposed outside the third wireless charging coil 1630. The 3-2 charging coil connection unit 1632 may extend from a coil wire disposed inside the third wireless charging coil 1630. Part of the first to third charging coil connecting portions 1611 to 1632 are disposed in the recesses formed by the cable access portions 1410 to solder the connecting pins P1 to P16. Space can be secured, and defect reduction and fairness can be improved.

In addition, each of the first and second connection lines of the wireless charging coil may be electrically connected through the connection pin (P). More specifically, the first and second connection lines of each of the wireless charging coils may be soldered and connected to each of the plurality of connection pins P. In addition, the first and second connection lines may be connected to the plurality of connection pins in the order in which one or more wireless charging coils are arranged. For example, as shown in FIG. 7, when there are a plurality of wireless charging coils, the second wireless charging coil 1620, the first wireless charging coil 1610, and the third wireless charging coil 1630 may be arranged in this order. The second-second charging coil connection unit 1622 of the second wireless charging coil 1620 may be soldered and connected between the first and second connection pins P1 and P2. In addition, the 2-1 charging coil connecting portion 1621 may be soldered and connected between the third and fourth connecting pins P3 and P4. In addition, the 1-2 charging coil connection unit 1612 may be soldered and connected between the fifth and sixth connection pins (P5, P6). In addition, the first-first charging coil connection unit 1611 may be soldered and connected between the seventh and eighth connection pins P7 and P8. In addition, the 3-2 charging coil connection unit 1632 may be soldered and connected between the ninth and tenth connection pins (P9, P10). In addition, the 3-1 charging coil connection unit 1163 may be soldered and connected between the eleventh and twelfth connection pins P11 and P12. At this time, the charging coil connection parts 1611, 1612, 1621, 1622, 1631, and 1632 connected to the respective connection pins P are spaced apart from the heat dissipation sheet 1300 by a predetermined distance (T16_1, T16_2, T16_3) when they are connected between the connection pins. , T16_4, T16_5, T16_6, T16_7, and T16_8. Specifically, each of the charging coil connection parts 1611, 1612, 1621, 1622, 1631, and 1632 are soldered to each of the connection pins P to perform a soldering process for electrically connecting the charging coil connection part and the connection pins. . At this time, the soldering jig is used to solder the charging coil connection part and the connecting pin, and the soldering jig is removed. T16_4, T16_5, T16_6, T16_7, and T16_8) to be floated and soldered.

As described above, the wireless charging device according to an embodiment configures a first shielding material for a wireless communication coil and a second shielding material for a wireless charging coil. In addition, by winding the wireless communication coil in a helical form on the second shielding material, it may have an effective characteristic according to the decrease in the directional resistance and the improvement of the recognition rate.

Hereinafter, a wireless charging device according to another embodiment configured by adding a shielding wall to the wireless charging device according to the embodiment will be described in detail with reference to FIGS. 26 to 30.

FIG. 26 is an exploded perspective view of a wireless charging device according to still another embodiment, FIG. 27 is a perspective view of the wireless charging device shown in FIG. 26, and FIG. 28 is taken along line AA ′ of the wireless charging device shown in FIG. 27. Fig. 29 is a side view showing a cut section, and Fig. 29 is a side view showing a cut section along B-B 'of the wireless charging device shown in Fig. 27, and Fig. 30 is a C- of the wireless charging device shown in Fig. 27. It is a side view which shows the cross section cut along C '.

26 to 30, a wireless charging device according to another embodiment may include a heat dissipation sheet 1300, a first shielding material 1700, a wireless communication coil 1500, a second shielding material 1400, and a wireless charging coil module. (1600).

The heat dissipation sheet 1300 may emit heat to the outside of the wireless charging device when heat generated from the wireless charging coil module 1600 is transferred through the heat dissipation holes of the shielding materials 1400 and 1700. The heat dissipation sheet 300 may be made of a material having high thermal conductivity or high thermal emissivity. For example, it may include aluminum. However, the present invention is not limited thereto and may include various heat radiating materials.

The heat dissipation sheet 300 may support the shielding material 1400. 1700, the wireless communication coil 1500, and the wireless charging coil 1600. The area of the heat dissipation sheet may be larger than the area of the first shielding material 1700 disposed above. In addition, the heat dissipation sheet 300 may include a first hole h1, a second hole h2, a third hole h3, and a fourth hole h4. The first to fourth holes h1 to h4 formed in the heat dissipation sheet 1300 may be connected to other substrates (not shown) or the case (not shown) by a fastening member (not shown).

In addition, the heat dissipation sheet 300 may include a plurality of pin holes (Ph). In each of the pin holes Ph, connecting pins (first to sixteenth) are inserted to extend from an upper surface to a lower surface of the heat dissipation sheet 1300. Wireless charging coil modules may be electrically connected by the connection pins P1 to P16. In this case, the lower surface 1300b of the heat dissipation sheet 1300 may include a connection pin supporter (PS) for fixing the connection pins P1 to P16. The connection pin supporter PS allows the plurality of connection pins to be firmly fixed to the heat dissipation sheet 1300, and may be disposed on the bottom surface of the heat dissipation sheet 1300 in correspondence with the plurality of connection pins P1 to P16. . In addition, the area of the connection pin supporter PS may be larger than the area in which the plurality of connection pins are disposed.

The first shielding material 1700 may be disposed on the heat dissipation sheet 1300. An adhesive or an adhesive member (not shown) may be disposed and fixed to the first shielding material 1700 and the heat dissipation sheet 1300. In addition, the first shielding member 1700 supports the second shielding member 1400 disposed on the first shielding member 1700 and performs a function for improving performance of the wireless communication coil 1500 and the wireless charging coil module 1600. can do. That is, the upper surface of the first shielding member 1700 may support the wireless communication coil 1500 formed to surround the side of the second shielding member 1400 and perform a function for improving performance.

The first shielding material 1700 may be formed larger than the size of the second shielding material 1400. In more detail, the first shielding member 1400 may be formed to a size that allows all four directions to protrude to twice or more than the thickness of the wireless communication coil wound to the outside of the second shielding member 1700.

In particular, the first shielding material 1700 according to another embodiment may include a bottom portion 1701 and a shielding wall 1702. In detail, the first shielding material 1700 may include a bottom portion 1701 adhered to the second shielding material 1400 and a shielding wall 1702 formed to surround the outer region of the first shielding material 1700. In this case, the shielding wall 1702 may form an open area 1710 on one side. The open area 1710 may be formed in a direction and a space in which each coil connection portion of the wireless charging coil may be drawn out. In addition, the open area 1710 is not an essential configuration, and no open area is formed, and the shielding wall 1702 may be formed in a closed loop shape. When the open area of the shielding wall 1702 is not present, the bottom portion 1701 of the first shielding material 1700 may form a connection part through hole (not shown). The connection part through hole may be formed to correspond to the wireless charging coil connection part to penetrate the coil connection part of the wireless charging coil.

The shielding wall 1702 may be formed to the height of the second shielding material 1400. Specifically, referring to FIG. 29, the height T19 of the shielding wall 1702 may extend to the height T17 of the second shielding member 1400.

The wireless communication coil 500 may be disposed to be wound a plurality of times so as to surround a side surface of the second shielding material 700 in a helical form. The helical form refers to the coils being wound while overlapping in the height (vertical) direction. That is, it refers to a wireless communication coil wound by vertically stacked. In detail, the wireless communication coil 500 may be formed of a cotton yarn, a Litz wire, and an enameled copper wire. The wireless communication coil according to the present embodiment has excellent features of fairness and reliability compared to the wireless communication coil pattern printed on the PCB substrate. In addition, since it is formed on the side of the second shielding material 1700, a separate PCB substrate is not required, so that the overall thickness of the wireless charger can be reduced. In addition, the recognition rate can be improved because the resistance is lower than the coil pattern, and the cost is low, it can have a material cost reduction effect.

The second shield 1400 is disposed on the first shield 1700 and supports the wireless charging coil module 1600. In detail, the second shielding member 1400 may include a first shielding member 1700 disposed at a lower portion thereof, and a wireless charging coil module 1600 disposed at an upper portion thereof. In this case, the first shielding member 1700 and the wireless charging coil module 1600 may be fixed to the upper and lower portions of the second shielding member 1400 by an adhesive or an adhesive member, respectively.

The second shielding member 1400 may be disposed on a lower surface of the wireless charging coil module 1600 to support the wireless charging coil module 1600. For example, when there are a plurality of wireless charging coils constituting the wireless charging coil module 1600, the second shielding material 1400 may be disposed on the bottom surfaces of the second wireless charging coil 1620 and the third wireless charging coil 1630. have. An adhesive or an adhesive member (not shown) is disposed between the upper surface of the second shielding member 1400 and the lower surface of the second wireless charging coil 1620 and the third wireless charging coil 1630 to form the second shielding member 1400 and the second. And third wireless charging coils 1620 and 1630 may be fixed. The upper portion of the second shielding member 1400 may guide the wireless power generated from the wireless charging coil module 1600 disposed at the upper portion in the charging direction, and may protect various circuits disposed at the lower side from the electromagnetic field.

In addition, the second shielding member 1400 may have a cable access portion 1410 having a recess structure. The cable access part 1410 of the second shielding material 1400 may secure a space of the charging coil connection part when the charging coil connection part of the wireless charging coil is connected to the connection pin disposed on the heat dissipation sheet 300.

As shown in FIG. 24, the second shielding material 1400 may be wound around the wireless communication coil 1500. The second shielding member 1400 and the wireless communication coil 1500 may be fixed by an adhesive or an adhesive member (not shown). In more detail, the wireless communication coil 1500 may be wound N times to surround the side surface of the second shielding material 1400. In the present exemplary embodiment, the wireless communication coil 1500 is formed by winding the second shielding member 1400 three times.

The wireless communication coil 1500 is adhered and fixed to the side of the second shielding member 1400 by an adhesive or an adhesive member (not shown). The wireless communication coil 1500 may extend from one side of the second shielding member 1400, and may be formed to vertically surround a side of the second shielding member 1400. In this case, the wireless communication coil 1500 may be formed at positions spaced apart from the upper and lower portions of the height of the second shielding member 1400 by threshold values T10 and T11, respectively. The separation distances T10 and T11 may be proportional to the thickness of the wireless communication coil 1500. The separation distances T10 and T11 may be formed to correspond to the thickness of the wireless communication coil 1500.

The wireless communication coil 1500 has a thickness T12_1 of a threshold value. For example, the thickness T12_1 of the wireless communication coil 1500 may be 0.5 mm. In detail, the thickness T12_1 of the wireless communication coil 1500 is 0.5 mm, and the side surface of the shielding member 1400 may be vertically laminated and wrapped so that the wireless communication coil having a thickness of 0.5 mm is wound three times. In this case, the wireless communication coil 1500 may be wound at a position spaced at least 0.5 mm (T10) from the top of the shielding member 1400 and at least 0.5 mm (T11) from the bottom. That is, the first turned wireless communication coil 1510 is formed at a position spaced 0.5 mm (T10) or more from the upper portion of the second shielding member 1400, and is sequentially wound in a downward direction and the third turned wireless communication coil 1530. ) May be formed at a position spaced at least 0.5 mm (T12) from the lower portion of the second shielding member 1400. Therefore, the height T17 of the second shielding member 1400 may be formed to have at least 2.5mm or more. In addition, the shielding wall 1702 of the wireless communication coil 1500 and the first shielding material 1700 may be spaced apart from the critical distance (T18).

In addition, in the present exemplary embodiment, the wireless communication coil 1500 is wound from the upper portion to the lower portion of the second shielding material 1400. For example, the present invention is not limited thereto, and the wireless communication coil 1500 may include the second shielding material 1400. It may be formed to be wound from the bottom to the top).

One side and the other side of the wireless communication coil 1500 may be connected to the connection pin (P), respectively. Specifically, one side of the wireless communication coil 1500 may be soldered and connected between the thirteenth and fourteenth connection pins P13 and P14, and the other side may be soldered and connected between the fifteenth and sixteenth connection pins P15 and P16. Can be.

The wireless charging coil module 1600 may include one or more wireless charging coils. When there are a plurality of wireless charging coils, the wireless charging coils may be wound in the same number of turns. The present invention is not limited thereto and may be wound at different turns. In addition, the plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and may have different inductances.

In addition, the plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include the first wireless charging coil 1610 to the third wireless charging coil 1630. The second wireless charging coil 1620 and the third wireless charging coil 1630 may be disposed on the first layer disposed on the same layer. The first wireless charging coil 1610 may be disposed above the second wireless charging coil 1620 and the third wireless charging coil 1630 and disposed on the second layer. Therefore, the charging region can be extended to arrange the plurality of wireless charging coils in different layers to efficiently transfer the wireless power.

Also, the one or more wireless charging coils may include first and second connections through which an AC signal is input or output. The first and second connections may be wires or cables coated with a sheath. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 1610 may include a first-first charging coil connector 1611 and a second-second charging coil connector 612. The first-first charging coil connection unit 1611 may extend to a coil wire disposed outside the first wireless charging coil 1610. The 1-2 charging coil connection unit 1612 may extend from a coil wire disposed inside the first wireless charging coil 1610. The second wireless charging coil 1620 may include a 2-1 charging coil connector 1641 and a 2-2 charging coil connector 1622. The 2-1 charging coil connection unit 1621 may extend from a coil line disposed outside the second wireless charging coil 1620. The 2-2 charging coil connecting unit 1622 may extend from a coil wire disposed inside the second wireless charging coil 1620. The third wireless charging coil 1630 may include a 3-1 charging coil connection unit 1163 and a 3-2 charging coil connection unit 632. The 3-1 charging coil connection unit 1163 may extend from a coil line disposed outside the third wireless charging coil 1630. The 3-2 charging coil connection unit 1632 may extend from a coil wire disposed inside the third wireless charging coil 1630. Part of the first to third charging coil connecting portions 1611 to 1632 are disposed in the recesses formed by the cable access portions 1410 to solder the connecting pins P1 to P16. Space can be secured, and defect reduction and fairness can be improved.

In addition, each of the first and second connection lines of the wireless charging coil may be electrically connected through the connection pin (P). More specifically, the first and second connection lines of each of the wireless charging coils may be soldered and connected to each of the plurality of connection pins P. In addition, the first and second connection lines may be connected to the plurality of connection pins in the order in which one or more wireless charging coils are arranged. For example, as shown in FIG. 7, when there are a plurality of wireless charging coils, the second wireless charging coil 1620, the first wireless charging coil 1610, and the third wireless charging coil 1630 may be arranged in this order. The second-second charging coil connection unit 1622 of the second wireless charging coil 1620 may be soldered and connected between the first and second connection pins P1 and P2. In addition, the 2-1 charging coil connecting portion 1621 may be soldered and connected between the third and fourth connecting pins P3 and P4. In addition, the 1-2 charging coil connection unit 1612 may be soldered and connected between the fifth and sixth connection pins (P5, P6). In addition, the first-first charging coil connection unit 1611 may be soldered and connected between the seventh and eighth connection pins P7 and P8. In addition, the 3-2 charging coil connection unit 1632 may be soldered and connected between the ninth and tenth connection pins (P9, P10). In addition, the 3-1 charging coil connection unit 1163 may be soldered and connected between the eleventh and twelfth connection pins P11 and P12. In this case, the charging coil connection parts 1611, 1612, 1621, 1622, 1631, and 1632 connected to the respective connection pins P are spaced apart from the heat dissipation sheet 1300 by a predetermined distance (T20_1, T20_2, and T20_3) when connected between the connection pins. , T20_4, T20_5, T20_6, T20_7, and T20_8. Specifically, each of the charging coil connection parts 1611, 1612, 1621, 1622, 1631, and 1632 are soldered to each of the connection pins P to perform a soldering process for electrically connecting the charging coil connection part and the connection pins. . At this time, the soldering jig is used to solder the charging coil connection part and the connecting pin, and the soldering jig is removed. T20_4, T20_5, T20_6, T20_7, T20_8) to be supported and soldered.

The wireless charging device according to another embodiment as described above comprises a first shielding material for the wireless communication coil and a second shielding material for the wireless charging coil. In addition, by forming a shielding wall on the first shielding material, and by winding the wireless communication coil to the second shielding material in a helical manner, it is possible to increase the inductance of the radio communication coil and reduce the resistance value, thereby improving the recognition rate. .

Table 1 below shows the electrical characteristics of the improved wireless charging device according to the embodiments.

Inductance Resister Recognition distance Center to Center reference recognition range PCB Type NFC 0.87 0.32 25 ± 21mm Spiral NFC (without shielded wall) 0.94 0.24 29 ± 38mm Helical NFC (without shielded wall) 0.94 0.21 31 ± 32mm

As shown in Table 1, it can be seen that the inductance increases and the resistance decreases according to the structural characteristics of the wireless communication coil and the structural characteristics of the shielding material according to the present embodiment. Also. As the vertical recognition distance is improved, the electrical performance may be improved as compared with a wireless communication coil configured in a printed pattern form on a conventional substrate.

It will be apparent to those skilled in the art that the present embodiment may be embodied in other specific forms without departing from the spirit and essential features of the present embodiment.

Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims (17)

Heat dissipation sheet;
A shielding material disposed on the heat dissipation sheet;
A wireless charging coil module disposed on the shield; And
And a wireless communication coil disposed on the shielding material, the wireless communication coil being wound a plurality of times in a horizontal direction so as to surround the wireless charging coil module.
The shielding material
A first shielding material disposed on the heat dissipation sheet and supporting the wireless communication coil;
And a second shield disposed on the first shield and supporting the wireless charging coil module.
The wireless communication coil is a wireless charging device is disposed to be wound a plurality of horizontally so as to surround the side of the second shielding material. The method of claim 1,
The second shielding material
Wireless charging device including a cable access unit for drawing out the connection portion extending from the wireless charging coil of the wireless charging coil module. The method of claim 1,
The first shielding material is a wireless charging device is formed larger than the second shielding material. The method of claim 1,
The first shielding material further comprises a shielding wall formed spaced apart from the wireless communication coil. The method of claim 4, wherein
The shielding wall is a wireless charging device is formed integrally with the bottom of the first shielding material. The method of claim 4, wherein
The shielding wall is
Wireless charging device is formed to extend to the height of the second shielding material. Heat dissipation sheet;
A shielding material disposed on the heat dissipation sheet;
A wireless charging coil module disposed on the shield; And
Wireless charging device comprising a; wireless communication coil wound by stacking in a vertical direction on the side to surround the shielding material. The method of claim 7, wherein
The wireless communication coil is a wireless charging device that is wound by forming a spaced apart in each of the upper and lower sides of the shielding material. The method of claim 8,
The spacing part
Wireless charging device that the upper and lower portion is formed in the same size. The method of claim 7, wherein
The shielding material
A first shielding material disposed on the heat dissipation sheet; And
And a second shielding material disposed on the first shielding material, wherein the wireless communication coil is wound to the side, and supports the wireless charging coil module. The method of claim 10,
The first shielding material is a wireless charging device is formed larger than the second shielding material. The method of claim 10,
The second shielding material
Wireless charging device for winding the wireless communication coil by forming a spaced portion in each of the upper and lower portions. The method of claim 10,
The first shielding material
Wireless charging device further comprises a shielding wall disposed spaced apart from the wireless communication coil. The method of claim 13,
The shielding wall is
Wireless charging device is formed integrally with the bottom of the first shielding material. The method of claim 13,
The shielding wall is a wireless charging device formed to be spaced apart more than twice the thickness of the wireless communication coil from the wireless communication coil. The method of claim 13,
The shielding wall is
Wireless charging device is formed to be softened to the second shielding material height. The method of claim 13,
The shielding wall is
Wireless charging device including an open area on one side so that the charging coil connection portion extending from the wireless charging coil or the wireless communication coil.

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