KR20190074734A - Wireless charger having wireless communication coil - Google Patents

Abstract

An embodiment of the present invention relates to a wireless charger having a wireless communication coil. According to an embodiment of the present invention, the wireless charger comprises: a board; a shielding material arranged on the board; a wireless charging coil module arranged on the board and the shielding material; a first heat radiating member arranged on an upper surface of the board; a second heat radiating member arranged on a lower surface of the board; and a wireless communication coil pattern arranged on the board and arranged to be separated from the first heat radiating member. The second heat radiating member includes: a ground heat radiating unit arranged in an edge region of the board; a main heat radiating unit arranged in a region overlapping the first heat radiating unit; and a connection heat radiating unit for connecting the ground heat radiating unit and the main heat radiating unit.

Description

[0001] WIRELESS CHARGER HAVING WIRELESS COMMUNICATION COIL WITH WIRELESS COMMUNICATION COIL [0002]

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

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

2. Description of the Related Art [0002] Generally, as an example of an electrical connection between a charging device and a battery for charging electric power of a battery, a commercial electric power is supplied to a terminal for converting electric power into voltage and current corresponding to the battery, Supply method. This type of terminal supply is accompanied by the use of physical cables or wires. Therefore, when handling a lot of terminal-supplied equipment, many cables occupy considerable work space, are difficult to organize, and are not well apparent. Also, the terminal supply method may cause problems such as instantaneous discharge due to different potential difference between terminals, burnout due to foreign substances, fire, natural discharge, battery life and deterioration of performance.

In order to solve such a problem, a charging system (hereinafter referred to as a "wireless charging system") and a control method using a method of transmitting power wirelessly are proposed. In addition, since the wireless charging system has not been installed in some portable terminals in the past and the consumer has to purchase a separate wireless charging receiver accessory, the demand for the wireless charging system is low, but the wireless charging user is expected to increase rapidly. Wireless charging function is expected to be equipped basically.

Generally, a wireless charging system comprises a wireless power transmitter for supplying electric energy in a wireless power transmission mode and a wireless power receiver for receiving electric energy supplied from a wireless power transmitter to charge the battery.

In addition, due to the development of mobile communication and information processing technologies, portable terminals provide various wireless Internet services such as content services as well as video telephony. Such a portable terminal uses NFC (Near Field Communication) technology to provide the above-mentioned service. NFC technology is a non-contact, short range wireless communication using the frequency band of 13.56 MHz, which means a communication technology that transmits data bidirectionally between terminals within a distance of 10 cm.

In general, when the wireless charging coil and the wireless communication coil are integrally mounted on the wireless charging device, interference or performance deterioration due to the grounding, the radiation member, and the like may occur. That is, the efficiency for wireless communication may be reduced due to the configuration for increasing the wireless charging efficiency.

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

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

The present embodiment also provides a wireless charging apparatus having a miniaturized wireless communication coil.

In addition, the present embodiment provides a wireless charging device having a wireless communication coil with excellent heat radiation effect.

The present embodiment also provides a wireless charging device having a wireless communication coil with a simplified manufacturing process.

Further, the present embodiment provides a wireless charging apparatus having a wireless communication coil whose manufacturing cost is reduced.

In addition, the present embodiment provides a wireless charging device having a wireless communication coil with excellent heat generating effect.

The present embodiment also provides a wireless charging device having a wireless communication coil capable of increasing wireless communication and wireless charging efficiency.

The technical problems to be solved by this embodiment are not limited to the above-mentioned technical problems and other technical problems which are not mentioned are clarified from the following description to those skilled in the art to which the embodiments belong, .

The wireless charging apparatus according to the present embodiment includes a substrate; A shielding material disposed on the substrate; A wireless charging coil module disposed on the substrate and the shielding member, a first heat dissipating member disposed on an upper surface of the substrate, A second heat dissipating member disposed on a lower surface of the substrate; And a wireless communication coil pattern disposed on the substrate and spaced apart from the first heat radiation member, wherein the second heat radiation member is disposed in an edge region of the substrate; A main radiating part disposed in a region overlapping the first radiating member, and a connection radiating part connecting the ground radiating part and the main radiating part.

The grounded heat dissipation unit includes a first grounded heat dissipation unit disposed at one edge region of the substrate and a second grounded heat dissipation unit disposed at the other edge region of the substrate.

The first and second ground heat dissipation units are connected to the main heat dissipation unit by the connection heat dissipation unit and the connection heat dissipation unit includes a first connection heat dissipation unit for connecting the main heat dissipation unit and the first ground heat dissipation unit, ; And a second connection heat dissipation unit connecting the main heat dissipation unit and the second ground heat dissipation unit.

Also, the first connection heat sink and the second connection heat sink have a critical width, and are arranged to overlap the wireless communication coil pattern by the critical width.

The first connection heat dissipation part and the second connection heat dissipation part are disposed in a diagonally opposite spacing direction.

The first connection heat dissipation unit and the second connection heat dissipation unit have the same critical width.

In addition, the critical width of the ground heat dissipation part is formed to be 7 mm or less.

The critical width of the grounded heat-radiating portion is in the range of 7 mm to 4 mm.

The main radiator of the second radiator is disposed at a position corresponding to the first radiator.

Further, the ground heat dissipation unit and the main heat dissipation unit are disposed so as not to overlap with the wireless communication coil pattern.

The ground heat dissipation unit and the main heat dissipation unit are disposed apart from the wireless communication coil pattern.

In addition, the first radiation member and the second radiation member are formed of copper (Cu).

Effects of the wireless charging device having the wireless communication coil according to the present embodiment will be described as follows.

The present embodiment can provide a wireless charging apparatus having a wireless communication coil.

In addition, the present embodiment can realize a wireless communication coil which can be wirelessly charged and wirelessly communicated while being miniaturized.

Also, the present embodiment can be performed in an environment in which wireless charging and wireless communication are optimized.

Also, the wireless charging apparatus according to the present embodiment may not reduce the operation efficiency while increasing the heating effect.

The effects obtainable in the present embodiment are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description There will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that 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 for explaining 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 of the present invention.
3 is an exploded perspective view of the wireless charging apparatus according to the present embodiment.
4 is a plan view and a bottom view of the wireless charging apparatus according to the present embodiment.
5 is a graph for explaining characteristics of a wireless communication coil according to a connection heat sink to which the present embodiment is applied.
6 is a plan view for explaining an arrangement characteristic of the connection heat sink according to the present embodiment
7 is a graph for explaining charging performance characteristics according to the arrangement characteristics of the connection heat sink of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which the embodiments are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The present invention is not necessarily limited to these embodiments, as long as all of the constituent elements of the embodiment are described as being combined or operated together. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. The codes and code segments constituting the computer program may be easily deduced by those skilled in the art. Such a computer program may be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing embodiments. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

In the description of the embodiment, in the case of being described as being formed on the "upper or lower", "before" or "after" of each component, (Lower) "and" front or rear "encompass both that the two components are in direct contact with each other or that one or more other components are disposed between the two components.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In the description of the embodiments, an apparatus for transmitting wireless power on a wireless power charging system includes a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, , A wireless power transmission device, a wireless power transmitter, a wireless charging device, and the like. For the sake of convenience, a wireless power receiving device, a wireless power receiving device, a wireless power receiving device, a wireless power receiving device, a receiving terminal, a receiving side, a receiving device, a receiver Terminals and the like can be used in combination.

The wireless charging device according to the embodiment may be configured as a pad type, a cradle type, an access point (AP) type, a small base type, a stand type, a ceiling embedded type, a wall type, Power may be transmitted to the device.

As an example, a wireless power transmitter can be used not only on a desk or on a table, but also developed for automobiles and used in a vehicle. A wireless power transmitter installed in a vehicle can be provided in a form of a stand that can be easily and stably fixed and mounted.

A mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, an MP3 player, (Hereinafter referred to as a " device ") capable of charging a battery by mounting a wireless power receiving means according to an embodiment, but not limited thereto, may be used for a small electronic device such as a toothbrush, an electronic tag, a lighting device, Quot;), and the term terminal or device may be used in combination. A wireless power receiver according to another embodiment may also be mounted on a vehicle, an unmanned aerial vehicle, an air drone or the like.

A wireless power receiver according to an embodiment may include at least one wireless power transmission scheme and may receive wireless power from two or more wireless power transmitters at the same time. Here, the wireless power transmission scheme may include at least one of the electromagnetic induction scheme, the electromagnetic resonance scheme, and the RF wireless power transmission scheme. Particularly, the wireless power receiving means for supporting the electromagnetic induction method includes a wireless power consortium (WPC), which is a wireless charging technology standard organization, and an electromagnetic induction wireless charging technique defined by the Air Fuel Alliance (formerly PMA, Power Matters Alliance) . In addition, the wireless power receiving means supporting the electromagnetic resonance method may include a resonance wireless charging technique defined in the Air Fuel Alliance (formerly Alliance for Wireless Power) standard mechanism, a wireless charging technology standard organization.

Generally, a wireless power transmitter and a wireless power receiver that constitute a wireless power system can exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication. Here, the in-band communication and the BLE communication can 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, and the like. For example, the wireless power receiver can 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 reception coil in a predetermined pattern. The information transmitted by the wireless power receiver may include various status information including received power intensity information. At this time, the wireless power transmitter can calculate the charging efficiency or the power transmission efficiency based on the received power intensity information.

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

Referring to FIG. 1, the wireless charging system includes a wireless power transmission terminal 10 for transmitting power wirelessly, a receiving terminal 20 for receiving the transmitted power, and an electronic device 30 receiving the received power .

For example, the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 can perform in-band communication in which information is exchanged using the same frequency band as the operating frequency used for wireless power transmission. In another example, the wireless power transmitting terminal 10 and the wireless power receiving terminal 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.

For example, information exchanged between the wireless power transmitting terminal 10 and the wireless power receiving terminal 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 become more apparent 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 the present invention is not limited thereto, and in other embodiments, it may provide unidirectional communication or half-duplex communication.

For example, the unidirectional communication may be that the wireless power receiving terminal 20 transmits information only to the wireless power transmitting terminal 10, but the present invention is not limited thereto, and the wireless power transmitting terminal 10 may transmit information Lt; / RTI >

In the half duplex communication mode, bidirectional communication is possible between the wireless power receiving terminal 20 and the wireless power transmitting terminal 10, but information can be transmitted only by any one device at any time.

The wireless power receiving terminal 20 according to the embodiment may acquire various status information of the electronic device 30. [ For example, the status information of the electronic device 30 may include current power usage information, information for identifying an application being executed, CPU usage information, battery charge status information, battery output voltage / current information, And is information obtainable from the electronic device 30 and available for wireless power control.

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

2, the wireless power transmitter 200 includes a power conversion unit 210, a power transmission unit 220, a wireless charging communication unit 230, a control unit 240, a current sensor 250, a temperature sensor 260, A storage unit 270, 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 essential, and may be configured to include more or less components.

As shown in FIG. 2, the power supply unit 100 may 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 supply. The embodiment is not limited to the form of the power supply unit 100.

When power is supplied from the power supply unit 100, the power conversion unit 210 may convert the power to a predetermined intensity.

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

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

The amplifier 212 can adjust the intensity of the DC / DC-converted power according to the control signal of the controller 240. For example, the control unit 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 received power reception state information may be transmitted to the amplifier 212 based on the power control signal. The degree of amplification can be adjusted. For example, the power reception status information may include, but is not limited to, the intensity information of the rectifier output voltage, the intensity information of the current applied to the reception coil, and the like. 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 can measure the input current input to the driving unit 210. The current sensor 250 may provide the measured input current value to the control unit 240. [ For example, the control unit 240 may adaptively cut off the supply of power from the power supply unit 100 or block the supply of power 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 control unit 240. Specifically, the temperature sensor 260 may include one or more temperature sensors. One or more temperature sensors may be arranged corresponding to the transmission coil 223 of the power transmission unit 220 to measure the temperature of the transmission coil 223. [ For example, the control unit 240 may adaptively cut off the power supply from the power supply unit 100 or block the power supply to the amplifier 212 based on the temperature value measured by the temperature sensor 260. To this end, a power cutoff circuit may be further provided at one side of the power conversion unit 210 to cut off power supplied from the power supply unit 100 or to cut off power supplied to the amplifier 212. In another example, the control unit 240 may adjust the intensity of the power supplied to the power transfer unit 220 based on the temperature value measured by the temperature sensor 260. Thus, the wireless power transmitter according to the embodiment can prevent the internal circuit from being damaged due to overheating.

The power transmitting unit 220 transmits the power signal output from the power converting unit 210 to the wireless power receiver. To this end, the power transmitting unit 2200 may include a driving unit 221, a selecting unit 222, and one or more transmitting coils 223.

The driving unit 221 may generate an AC power signal having an AC component having a specific frequency inserted into the DC power signal output from the power conversion unit 210 and transmit the generated AC power signal to the transmission coil 223. At this time, the frequencies of the AC power signals transmitted to the plurality of transmission coils included in the transmission coil 223 may be the same or different from each other.

The selecting unit 222 may receive an AC power signal having a specific frequency from the driving unit 221 and may transmit the AC power signal to the transmitting coil selected from among the plurality of transmitting coils. Here, the coil selector 222 may control the AC power signal to be transmitted to the transmission coil selected by the controller 240 according to a predetermined control signal of the controller 240. More specifically, the selection unit 222 may include a switch (not shown) for connecting LC resonance circuits corresponding to the plurality of transmission coils 223. The selecting unit 222 may be omitted from the power transmitting unit 220 when the transmitting coil 2230 is configured as one transmitting coil.

The transmitting coil 223 may include at least one transmitting coil, and may transmit the AC power signal received from the selecting unit 222 to the receiver through the transmitting coil. When there are a plurality of transmission coils, the transmission coil 223 may include first to n-th transmission coils. In order to select the "corresponding transmitting coil" among the plurality of transmitting coils, the selecting unit 222 may be implemented with a switch or a multiplexer. The transmission coil 223 may include one capacitor connected in series with the plurality of transmission coils to implement the LC resonance circuit. One end of the capacitor may be connected to the transmission coil 223 and the other end may be connected to the driving unit 221. Means a transmitting coil having a state that it can be coupled by an electromagnetic field to a receiving coil of a wireless power receiver that is qualified to receive power wirelessly. According to one embodiment, The control unit 240 can dynamically select a transmission coil to be used for wireless power transmission among a plurality of transmission coils provided based on a signal strength indicator received corresponding to a digital ping signal transmitted for each transmission coil.

The control unit 240 may control the selector 222 or the multiplexer so that the sense signal may be sequentially transmitted through the first through n'th transmit coils 223 during the first differential sense signal transmission procedure. At this time, the control unit 240 can identify the time at which the sensing signal is transmitted using the timer 290. When the sensing signal transmission time arrives, the controller 240 controls the selector 222 or the multiplexer, Can be controlled. For example, the timer 290 may transmit a specific event signal to the control unit 240 at predetermined intervals during the ping transmission step. When the event signal is detected, the control unit 240 controls the selecting unit 222 or the multiplexer, It is possible to control the digital ping to be transmitted through the coil.

The modulation unit 231 may modulate the control signal generated by the control unit 240 and transmit the modulated control signal to the driving unit 221. [ Here, the modulation scheme for modulating the control signal includes a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a phase shift keying (PSK) modulation scheme, a pulse width modulation scheme, A differential bi-phase modulation method, and the like.

The demodulator 232 can demodulate the detected signal and transmit the demodulated signal to the controller 240 when a signal received through the transmission coil is detected. Here, the demodulated signal may include a signal strength indicator, an EC (Error Correction) indicator for control during radio power transmission, an end of charge (EOC) indicator, an overvoltage / overcurrent / And may include various status information for identifying the status of the wireless power receiver.

The demodulation unit 232 may identify the signal from which the demodulated signal is received 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 acquire 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 transmission coils, and may perform in-band communication with the wireless power receiver using a separate coil.

The storage unit 270 stores the input current value of the wireless power transmitter according to the charging status of the wireless power receiver, the charging power intensity, the charging stoppage, the temperature of the wireless power transmitter for charging restart, Operation status, fan RPM, and the like.

The fan 280 may be rotated by the motor to cool the superheated wireless power transmitter 200. The fan 280 can be disposed in correspondence with the configuration of the superheat degree. For example, the fan 280 may be disposed corresponding to the power transmission unit 220. More specifically, the fan 280 may be disposed corresponding to the transmission coil 223 of the power transmission unit 220. The controller 240 can operate the fan 280 according to the state of charge of the wireless power receiver.

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

The wireless communication coil 202 may transmit and receive signals for use in short-distance bidirectional communication with a wireless power receiver.

3 is an exploded perspective view of the wireless charging apparatus according to the present embodiment.

Referring to FIG. 3, the wireless charging apparatus according to the present embodiment may include a wireless charging coil module 310. The wireless charging coil module 310 may include one or more wireless charging coils. The one or more wireless charging coils may be one or more transmitting coils of the power transmitter or one or more receiving coils of the wireless power receiver. Also, for example, when there are a plurality of wireless charging coils, each wireless charging coil may be wound with the same number of turns. But may be wound in different numbers of turns. The plurality of wireless charging coils may have the same inductance. The present invention is not limited thereto, and different inductances may be provided. The plurality of wireless charging coils may also be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include first to third wireless charging coils 311, 312, and 313. The second wireless charging coil 312 and the third wireless charging coil 313 may be disposed on the first layer so as to be disposed in the same layer. The first wireless charging coil 311 may be disposed above the second wireless charging coil 312 and the third wireless charging coil 313. Accordingly, a plurality of wireless charging coils can be disposed in different coils to expand the charging area so that wireless power can be efficiently transmitted.

Also, the one or more wireless charging coils may include first and second connection portions through which AC signals are input or output. The first and second connections may be wires or cables coated with a coating. For example, when there are a plurality of wireless charging coils, the first wireless charging coil 311 may include a 1-1 charging coil connecting portion 321 and a 1-2 charging coil connecting portion 322. The 1-1 filler coil connection portion 321 may extend from a coil line disposed inside the first wireless filler coil 311. The first to second charging coil connection portions 322 may extend from the coil line to be disposed outside the first wireless charging coil 311. The second wireless charging coil 312 may include a 2-1 charging coil connection 323 and a 2-2 charging coil connection 324. The second-first charging coil connection portion 323 may extend from a coil line disposed inside the second wireless charging coil 312. The second-second charging coil connection portion 324 may extend from the coil line to be disposed outside the second wireless charging coil 312. The third wireless charging coil 313 may include a third-first charging coil connection 325 and a third-second charging coil connection 326. The third-first charging coil connection part 325 may extend from a coil line disposed inside the third wireless charging coil 313. The third-second charging coil connection portion 326 may extend from the coil line to be disposed outside the third wireless charging coil 313.

In addition, the wireless charging device according to the embodiment may include the shielding material 330. The shield 330 may be disposed at or below the wireless charging coil module. For example, as shown in FIG. 3, when there are a plurality of wireless charging coils, the shielding material 330 may be disposed below or below the second wireless charging coil 312 and the third wireless charging coil 313. An adhesive or an adhesive material (not shown) is disposed between the upper surface of the shielding material 330 and the lower surface of the second wireless charging coil 312 and the lower surface of the third wireless charging coil 313, The charging coils 312 and 313 can be fixed. The shielding member 330 can guide the wireless power generated in the wireless charging coil module disposed at the upper portion in the charging direction and protect various circuits disposed at the lower portion from the electromagnetic field. Also, the shielding material 330 may include first through third heat dissipating holes (or function holes) 331, 332, and 333. The shielding material 330 transmits the heat generated from the wireless charging coil module to the heat dissipation members 400 and 700 disposed below the first built-in third heat dissipation holes 331, 332 and 333 to cool the wireless charging coil module I can help. The first to third heat dissipating holes 331, 332 and 333 are formed in the same region as the thermisters 411, 412, 413, 511, 512, and 513 disposed on the heat dissipating members 400 and 700 or the substrate 500 So that the temperature of the wireless charging coil module can be accurately measured by the thermistors 411, 412, 413, 511, 512, and 513.

  In addition, the wireless charging apparatus according to the embodiment may include a substrate 500. The substrate 500 may support the wireless charging coil module 310 and the shielding material 330. The substrate 500 may also be rigid. The rigid substrate 500 may be larger than the areas of the wireless communication coil 600, the wireless charging coil module 310, and the shielding material 330 disposed on the upper surface. Further, the substrate 500 may include terminal portions on the lower surface thereof. The terminal portion may include a plurality of connection patterns, a plurality of inner pads, a plurality of outer pads, and a plurality of via holes. The substrate 500 may include a hole on one side and a hole on the other side. Each hole can be connected to the second heat dissipation member 700 and other substrates disposed on the lower surface by the fastening member.

A plurality of terminal portions 550 may be included in one region of the upper surface of the substrate 500. The terminal portion 550 may be disposed on one side of the substrate and may include a plurality of connection terminals 551. The plurality of connection terminals 551 can be connected to a coil pattern extending from the transmission coil, respectively. Each of the connection terminals 551 includes a pin hole and can be electrically connected by the pin holes.

In addition, the wireless charging device according to the embodiment may include a wireless communication coil 600. The wireless communication coil 600 may be disposed on the upper surface of the substrate 500. The wireless communication coil 600 may be a wireless communication coil pattern that is pattern printed and disposed on the substrate 500.

In addition, the wireless charging apparatus according to the embodiment may include radiation members 400 and 700 on the top and bottom surfaces of the substrate 500, respectively. The first heat radiation member 400 disposed on the upper surface of the substrate 500 may be disposed on the lower surface of the shield 330. For example, an adhesive or an adhesive may be disposed between the upper surface of the first radiation member 400 and the lower surface of the shield 330 so that the first radiation member 400 and the shield 330 may be fixed. The heat generated from the wireless charging coil module is directly transmitted through the shield 330 or through the first through third heat dissipating holes 331, 332 and 333 of the shield 330, Heat can be released to the outside of the charging apparatus. The first heat-radiating member 400 may include a plurality of heat-radiating holes 420. May be formed on a part or the entire surface of the first heat radiation member (400) of the plurality of heat radiation holes (420). The heat dissipating holes 420 of the first heat dissipating member 400 may transmit heat generated from the wireless charging coil module 310 to the outside to help cool the wireless charging coil module. The plurality of heat dissipation holes 420 of the first heat dissipation member 400 may correspond to the positions, shapes, and sizes of the plurality of heat dissipation holes 520 of the substrate 500. The first radiating member 400 of the wireless charging apparatus according to the embodiment may include first to third thermistors 411, 412, and 413. The first to third thermistors 411, 412 and 413 of the first heat dissipating member 400 are disposed in a position and shape of the first to third heat dissipating holes (function holes) 331, 332 and 333 of the shielding material 330, Size. ≪ / RTI >

Meanwhile, the heat dissipating member according to the embodiment may include a second heat dissipating member 700 disposed on the lower surface of the substrate 500. For example, an adhesive or an adhesive member may be disposed between the upper surface of the second radiation member 700 and the lower surface of the substrate 500, so that the second radiation member 700 and the substrate 500 may be fixed. The second heat dissipation member 700 may be configured such that the heat absorbed by the first heat dissipation member 400 is transferred or the heat generated in the substrate 500 or the lower substrate Can be released.

The second heat dissipation member 700 of the wireless charging apparatus according to the embodiment may include a plurality of heat dissipation holes 740. The plurality of heat dissipation holes 740 of the second heat dissipation member 700 may transmit heat generated from the wireless charging coil module 310 to the outside to help cool the wireless charging coil module. The plurality of heat dissipating holes 740 of the second heat dissipating member 700 are positioned and shaped in relation to the plurality of heat dissipating holes 520 of the substrate 500 and the plurality of heat dissipating holes 420 of the first heat dissipating member 400 Lt; / RTI >

Hereinafter, the structure of the heat dissipating member described with reference to FIG. 3 will be described in detail with reference to FIG.

4 is a plan view and a bottom view of the wireless charging apparatus according to the present embodiment.

Referring to FIGS. 3 and 4, each of the upper and lower surfaces of the substrate of the wireless charging apparatus according to the present embodiment may include a heat dissipating member. 4A is an upper surface of the substrate, and FIG. 4B is an upper surface of the substrate.

More specifically, referring to FIG. 4A, an upper surface 500A of the substrate 500 may include a wireless communication coil 600.

The wireless communication coil 600 may be formed by connecting a plurality of wireless communication coil patterns. Specifically, the plurality of wireless communication coil patterns may include a first wireless communication coil pattern 601 and a second wireless communication coil pattern 602. One end of the first wireless communication coil pattern 601 may be connected to the second wireless communication coil pattern 602 by a connection pattern (not shown). The first wireless communication coil pattern 601 may be arranged extending clockwise from one end. At this time, the other end of the first wireless communication coil pattern 601 may be connected to the connection terminal 551. One end of the second wireless communication coil pattern 602 is connected to one end of the first wireless communication coil 601 by a connection pattern (not shown), and the other end of the second wireless communication coil pattern 602 extends from one end connected to the wireless communication coil 601 And may be connected to the connection terminal 551. At this time, a connection terminal to which the other end of the first wireless communication coil pattern 601 is connected and a connection terminal to which the first wireless communication coil pattern 602 is connected may be connected differently.

The first radiation member 400 may be disposed on the upper surface 500A of the substrate 500 inwardly of the wireless communication coil 600. [ The first heat-radiating member 400 may be arranged to correspond to a bottom surface on which the wireless charging coil module is disposed. Specifically, the first radiation member 400 may be arranged corresponding to the wireless charging coil module inside the substrate on which the wireless communication coil 600 is disposed. For example, the first radiation member 400 may include copper (Cu). The first heat-radiating member 400 may receive the heat generated by the wireless charging coil module to help cool the wireless charging coil module. The first heat-radiating member 400 may be formed corresponding to the size of the wireless charging coil module. Specifically, the first radiation member 400 may be formed to be larger than the wireless charging coil module. However, the first radiation member 400 may be formed to be smaller than the wireless communication coil pattern. The first radiation member 400 may be disposed inside the first wireless communication coil pattern 601 and the second wireless communication coil pattern 602 so as not to overlap with the wireless communication coil patterns.

The second heat dissipation member 700 may be disposed on the lower surface 500B of the substrate 500. 4 (b), the second heat dissipation member 700 includes the main heat dissipation unit 710, the ground heat dissipation units 720a and 720b, and the connection heat dissipation units 730a and 730b.

The main radiating portion 710 may function together with the first radiating member 400 disposed on the upper surface 500a of the substrate 500 to cool the heat generated in the RF coil module.

The main heat dissipating unit 710 may be disposed on the lower surface 500B of the substrate 500 in a size and position corresponding to the first heat dissipating member 400 disposed on the upper surface 500A of the substrate 500. [ The main radiating portion 710 may be disposed on the lower surface 500B of the substrate 500 inwardly to the upper surface 500A of the substrate 500 where the wireless communication coil 600 is disposed. The main heat radiating part 710 may be formed larger than the wireless charging coil module. Further, the mail heat radiating portion 710 may be formed smaller than the wireless communication coil pattern. That is, the main radiator 700 includes a first wireless charging coil pattern 601 disposed on the upper surface 500A of the substrate 500 and a second wireless communication coil pattern 602 disposed on the inner side of the substrate 500 The first radiating member 400 may be disposed at a position that does not overlap the wireless communication coil 600 by being disposed on the lower surface 500B and may be formed to correspond to the first radiating member 400. [ The main radiating portion 710 may be spaced apart from the inner side of the first wireless communication coil pattern 601 and the second wireless communication coil 602 among the wireless communication coils 600 by a critical width d3. Specifically, one side of the main radiating portion 710 may be spaced apart from the inside of the first wireless communication coil pattern 601 by a critical width d3. The other side of the main radiating portion 710 may be spaced apart from the inner side of the second wireless communication coil pattern 602 by a critical width d3. That is, the main radiator 710 includes a first wireless communication coil pattern 601 and a second wireless communication coil pattern 602 of the wireless communication coil 600 disposed on the upper surface 500A of the substrate 500 May be spaced apart from the bottom surface 500B of the substrate 500 corresponding to the position by a critical width d3. Preferably, the threshold width d3 may range from 4 mm to 6 mm. More preferably, the threshold width d3 may be 5 mm.

Also, the ground heat sinks 720a and 720b may be disposed in the edge area of the lower surface 500B of the substrate 500. Specifically, the ground heat dissipation units 720a and 720b may be disposed on one side and the other side of the lower surface 500B of the substrate 500, respectively. The grounding heat sinks 720a and 720b may include a first grounded heat sink 720a disposed on one side of the lower surface 500B of the substrate 500 and a second grounded heat sink 720b disposed on one side of the substrate 500 facing the first grounded heat sink 720a. And a second ground radiating portion 720b disposed on the other side of the lower surface 500B. The first ground heat dissipation unit 720a and the second ground heat dissipation unit 720b may be disposed apart from the main heat dissipation unit 710. [ The first and second ground heat dissipation units 720a and 720b may be disposed in areas that do not overlap with the wireless communication coil pattern 600 disposed on the top surface 500A of the substrate 500. [ That is, the first and second ground heat dissipation units 720a and 720b may be disposed apart from the main heat dissipation unit 710 by more than a width of the wireless communication coil pattern.

The distance between the first and second ground heat dissipation units 720a and 720b is spaced apart from the main heat dissipation unit 710. The distance between the first and second ground heat dissipation units 720a and 720b 500A) of the wireless communication coil (600). The first ground radiator 720a may be spaced apart from the first radio communication coil pattern 601 of the radio communication coil 600 disposed on the top surface 500A of the substrate 500 by a critical width d4 . The second ground radiator 720b may be spaced apart from the first radio communication coil pattern 601 of the radio communication coil 600 disposed on the top surface 500A of the substrate 500 by a critical width d4 have. That is, the first and second ground radiating parts 720a and 720b are disposed such that the first wireless communication coil pattern 601 of the wireless communication coil 600 disposed on the upper surface 500A of the substrate 500 is disposed Can be respectively disposed in the edge regions at a distance of a critical width d4 from the lower surface 500B of the substrate 500 corresponding to the positions. Preferably, the threshold width d4 may range from 4 mm to 6 mm. More preferably, the threshold width d4 may be 5 mm.

The first and second ground radiating parts 720a and 720b may be connected to the main radiating part 710. The first ground radiating part 720a and the second ground radiating part 720b may be connected to the ground the first ground radiating portion 720a includes a first hole h1 and a second hole h2 and the second ground radiating portion 720b includes a third grounding radiating portion 720b, A hole h3 and a fourth hole h4.

The first and second ground heat dissipation units 720a and 720b may be grounded through the first to fourth holes h1 to h4 and the heat absorbed from the first heat dissipation unit 400 may be grounded . ≪ / RTI >

The main heat sink 710 and the first and second ground heat sinks 720a and 720 may be connected by the connection heat sinks 730a and 730b, respectively.

Specifically, the connection heat dissipation units 730a and 730b include a first ground heat dissipation unit 720a and a second ground heat dissipation unit 720b spaced apart from one another on the basis of the main heat dissipation unit 710 and the main heat dissipation unit 710, Respectively. The connection heat sinks 730a and 730b are formed of a first connection heat sink 730a connecting the main heat sink 710 and the first ground heat sink 720a, a main heat sink 710 and a second ground heat sink 720b And a second connection heat sink 730b connecting the first connection heat sink 730b and the second connection heat sink 730b.

The first connection heat sink 730a may transmit the heat of the main heat sink 710 to the first ground heat sink 720a to increase the cooling effect. The first connection heat sink 730a connects the main heat sink 710 to the first ground connection heat sink 720a to ground the main heat sink 710.

The second connection heat dissipation unit 730b may transmit the heat of the main heat dissipation unit 710 to the second ground heat dissipation unit 730b to increase the cooling effect. The second connection heat sink 730b connects the main heat sink 710 to the second ground heat sink 720b to ground the main heat sink 710.

The first connection heat sink 730a and the second connection heat sink 730b may be arranged diagonally opposite each other. However, the present invention is not limited thereto, and the position of the coupled heat dissipating unit for connecting the main heat dissipating unit 710 to the first ground heat dissipating unit 720a and the second ground heat dissipating unit 720b may be varied.

The first connection heat sink 730a and the second connection heat sink 730b may have critical widths d1 and d2.

For example, the critical widths d1 and d2 according to this embodiment may be defined as the lengthwise direction of a region where the first connection heat sink 730a or the second connection heat sink 730b overlaps with the wireless communication coil 600 .

The first connection heat sink 730a may be formed to correspond to a width of the first connection heat sink 720a and the main heat sink 710. For example, the first connection heat dissipation part 730a may be formed to have a width larger than a distance between the first ground connection heat dissipation part 720a and the main heat dissipation part 710. [ The second connection heat dissipation part 730b may be formed to correspond to the width of the second ground heat dissipation part 720b and the main heat dissipation part 710. For example, the second connection heat dissipation part 730b may be formed to have a width larger than a distance between the second ground heat dissipation part 720b and the main heat dissipation part 710. [ The critical widths d1 and d2 of the first connection heat sink 730a and the second connection heat sink 730b may be the same.

The critical widths d1 and d2 of the first connection heat sink 720a and the second connection heat sink 720b may be 7 mm or less. The critical widths d1 and d2 of the first connection heat sink 720a and the second connection heat sink 720b may be 7 mm. The range or numerical value of the critical width d1. D2 is not limited, but may affect the characteristics of the wireless communication coil 600 depending on the critical width. Specifically, the inductance and resistance of the wireless communication coil 600 can be varied according to the critical width, which is the degree to which the first connection heat sink 720a and the second connection heat sink 720b overlap with the wireless communication coil 600 .

5, changes in characteristics of the wireless communication coil 700 according to the critical widths of the first connection heat sink 720a and the second connection heat sink 720b will be described in detail.

5 is a graph for explaining characteristics of a wireless communication coil according to a connection heat sink to which the present embodiment is applied.

5, inductance and resistance characteristics of the wireless communication coil 600 according to critical widths d1 and d2 of the first connection heat sink 720a and the second connection heat sink 720b are shown.

For example, when the critical widths d1 and d2 of the first connection heat sink 720a and the second connection heat sink 720b are 30 mm, the inductance value of the wireless communication coil 600 is about 0.63uH, About 0.5 ??. If the critical widths d1 and d2 are gradually decreased, the inductance characteristic of the wireless communication coil 600 is improved and the resistance characteristic is decreased as shown in the graph. Particularly, as in the present embodiment, when the critical widths d1 and d2 of the first connection heat sink 720a and the second connection heat sink 720b are 7 mm, the inductance characteristics and resistance characteristics of the wireless communication coil 600 Can be maximized. That is, when the critical widths d1 and d2 are 7 mm, the inductance characteristic has the maximum value and the resistance characteristic can have the minimum value. In addition, when the threshold widths d1 and d2 are reduced to less than 7 mmm, the inductance and resistance characteristics similar to the critical width of 7 mm can be obtained up to a certain threshold width. However, as shown in the graph of FIG. 5, inductance and resistance characteristics can be reduced when the threshold width is less than 4 mm.

That is, the first connection heat sink 720a and the second connection heat sink 720b according to the present embodiment may have a critical width of preferably 4 mm to 7 mm. More preferably, the first connection heat sink 720a and the second connection heat sink 720b may have a critical width of 7 mm. By setting the critical widths of the first connection heat sink 720a and the second connection heat sink 720b to 4 mm to 7 mm, the inductance and resistance characteristics of the wireless communication coil 600 can be maximized, There is an effect.

Meanwhile, the first connection heat sink 720a and the second connection heat sink 720b may be disposed opposite to each other. In particular, the first connection heat sink 720a and the second connection heat sink 720b may have a critical width and may be arranged to face each other diagonally. This placement characteristic may also affect the characteristics of the wireless communication coil 600. [

Hereinafter, the arrangement characteristics of the connection heat sink and the characteristics of the wireless communication coil according to the present embodiment will be described in detail with reference to FIGS. 6 and 7. FIG.

FIG. 6 is a plan view for explaining the arrangement characteristics of the connection heat sink according to the present embodiment, and FIG. 7 is a graph for explaining the charging performance characteristics according to the arrangement characteristics of the connection heat sink of FIG.

6 (a), 6 (b), and 6 (c) illustrate the case where the positions of the connected heat sinks are different from each other. b) and (c) are graphs showing the characteristics of the wireless communication coil according to the position of the coupled heat dissipation unit according to the example diagrams.

As shown in FIGS. 6 and 7, the inductance and resistance characteristics of the wireless communication coil may differ depending on the position where the connection heat dissipation unit connects the main heat dissipation unit and the ground heat dissipation unit, that is, the position of the connection heat dissipation unit.

Specifically, when the first connection heat sink portion 810a and the second connection heat sink portion 810b are arranged to face each other in the diagonal direction as shown in the example of FIG. 6 (a), the inductance is about 1.03 uH and the resistance value is 0.286 ??. 6 (b), when the first connection heat radiating portion 810a and the second connection heat radiation portion 810b are disposed on the same line, respectively, as shown in the graph of FIG. 7, the inductance is about 0.992 uH, and the resistance value is 0.284 ??. 6 (c), when the first connection heat sink 810a and the second connection heat sink 810b are arranged to face each other in the diagonal direction, as shown in the graph of FIG. 7, the inductance is 1.028uH , And the resistance value is 0.289 ??. 6 (a) is an example in which the first connection heat radiation portion is disposed below the second connection heat radiation portion, and in the example of FIG. 6 (b), when the first connection heat radiation portion is disposed above the second connection heat radiation portion to be.

6 and 7, even if the first connection heat dissipation unit and the second connection heat dissipation unit are arranged so as to face each other, the resistance characteristics of the wireless communication coil are maintained substantially similar when the first connection heat dissipation unit and the second connection heat dissipation unit are disposed diagonally opposite each other In addition, the inductance characteristics can be much better. 6 (a) and 6 (b) show that the first connection heat sink and the second connection heat sink are arranged so as to face each other in the diagonal direction but their inductance and resistance characteristics are somewhat different. The first connecting heat radiating part and the second connecting heat radiating part may be more excellent than the case where the first connecting heat radiating part and the second connecting heat radiating part are disposed so as to face each other on the same line.

Therefore, in the present embodiment, when the first connection heat radiating part and the second connection heat radiating part have a critical width and are disposed to face each other in the diagonal direction, the effect of improving the heat radiation characteristic while maintaining the optimal performance of the wireless communication coil have.

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

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (12)

Board;
A shielding material disposed on the substrate;
A wireless charging coil module disposed on the substrate and the shielding material;
A first heat dissipating member disposed on an upper surface of the substrate;
A second heat dissipating member disposed on a lower surface of the substrate; And
And a wireless communication coil pattern disposed on the substrate and spaced apart from the first heat radiation member,
The second heat-
A grounded heat sink disposed in an edge region of the substrate;
A main radiator disposed in a region overlapping the first radiator;
And a connection heat dissipation unit connecting the ground heat dissipation unit and the main heat dissipation unit. The method according to claim 1,
The ground-
A first grounded heat dissipation unit disposed at one edge region of the substrate; And
And a second ground heat dissipation unit arranged at the other edge region of the substrate. The method of claim 3,
The first grounded heat dissipation part and the second grounded heat dissipation part are respectively connected to the main heat dissipation part by the connected heat dissipation part,
The connection heat-
A first connection heat dissipation unit connecting the main heat dissipation unit and the first ground heat dissipation unit; And
And a second connection heat dissipation unit connecting the main heat dissipation unit and the second ground heat dissipation unit. The method of claim 3,
Wherein the first connection heat dissipation unit and the second connection heat dissipation unit have a critical width and are arranged to overlap with the wireless communication coil pattern by the critical width. The method of claim 3,
Wherein the first connection heat dissipation unit and the second connection heat dissipation unit are disposed in a diagonal direction opposite to each other. The method of claim 3,
Wherein the first connection heat dissipation unit and the second connection heat dissipation unit have the same critical width. The method according to claim 1,
And the critical width of the ground heat dissipation unit is 7 mm or less. The method according to claim 1,
Wherein a critical width of the ground heat dissipation unit is in the range of 7 mm to 4 mm. The method according to claim 1,
Wherein the main radiator of the second radiator is disposed at a position corresponding to the first radiator. The method according to claim 1,
Wherein the ground heat dissipation part and the main heat dissipation part are disposed so as not to overlap with the wireless communication coil pattern. 11. The method of claim 10,
Wherein the ground heat dissipation unit and the main heat dissipation unit are disposed apart from the wireless communication coil pattern. The method according to claim 1,
Wherein the first radiation member and the second radiation member are formed of copper (Cu).

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