KR20180101835A - Coil Device Of Apparatus For Transmitting And Receiving Wireless Power - Google Patents

Abstract

The present invention relates to a coil device and a wireless power transmitting and receiving device including the same. The coil device according to an embodiment of the present invention may include first to third coils having connection parts; and a coil frame which includes an upper accommodating part for accommodating the first coil, a lower accommodating part for accommodating the second and third coils, and a cable fixing part for fixing the connection parts of the first to third coils. The durability of transmitting and receiving coils can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coil device and a coil device,

The present invention relates to a wireless power transceiver comprising a coil device and a coil device.

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.

On the other hand, a wireless power transmitter has a transmitting coil to transmit wireless power, and a wireless power receiver has a receiving coil to receive wireless power. The transmitting coil or the receiving coil may include a plurality of cables for inputting / outputting an AC signal, for example, an input / output line. As the number of input / output lines increases, the process for connecting to the external configuration becomes complicated or the number of processes increases. Further, there is a problem in that the durability of the transmitting / receiving coil is reduced due to the movement of the input / output line.

It is an object of the present invention to provide a wireless power transceiver including a coil device and a coil device.

Further, the present invention can simplify the installation of the coil device by fixing the input / output lines of the transmission / reception coil.

Further, the present invention can increase the durability of the transmission / reception coil by fixing the input / output line of the transmission / reception coil.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a coil device comprising: first to third coils having connection portions; And a coil frame including an upper accommodating portion for accommodating the first coil, a lower accommodating portion for accommodating the second and third coils, and a cable fixing portion for fixing the connection portions of the first to third coils can do.

According to an embodiment of the present invention, the cable fixing portion includes a plurality of guide portions, each of the plurality of guide portions includes a first protrusion protruded in a first direction, and the guide portion adjacent to the first protrusion The first to third coils can be fixed to each other.

According to an embodiment of the present invention, the cable fixing portion further includes a cable support portion corresponding to the first protrusion, and each connecting portion of the first to third coils is fixed by the cable support portion and the first protrusion portion. can do.

According to an embodiment of the present invention, each of the plurality of guide portions includes a second protrusion protruded in a second direction, and the second protrusion is formed by extending each connection portion of the first to third coils in a downward direction It can be guided to be disposed.

Further, in the coil device according to an embodiment, the cable fixing part may protrude from the outer side of the coil frame.

Further, the coil device according to an embodiment may further include a coil frame fixing portion at an edge thereof, and a protruding distance from an outer side of the cable fixing portion may be less than a protruding distance from an outer side portion of the coil frame fixing portion.

Further, in the coil device according to an embodiment, the cable fixing portion may be disposed apart from the upper storage portion.

Further, the coil device according to an embodiment may further include a shielding material disposed below the second coil and the third coil and stored in the lower storage part.

In addition, the coil device according to an embodiment may further include a heat-radiating sheet disposed below the shield member and received in the lower housing part.

According to another aspect of the present invention, there is provided a wireless power transmission apparatus including first to third coils having a connection portion, an upper storage portion for storing the first coil, a lower storage portion for storing the second and third coils, And a coil frame including a cable fixing portion for fixing each connection portion of the first to third coils. And a drive circuit connected to the first to third coils.

According to another aspect of the present invention, there is provided a wireless power receiving apparatus including first to third coils having connection portions, an upper storage portion for storing the first coil, a lower storage portion for storing the second and third coils, And a coil frame including a cable fixing portion for fixing each connection portion of the first to third coils. And a control circuit connected to the first to third coils.

Effects of the wireless power transmitting / receiving device including the coil device and the coil device according to the present invention will be described as follows.

The present invention can provide a wireless power transmission / reception device including a coil device and a coil device.

Further, the present invention can provide a coil device capable of fixing input / output lines of a transmission / reception coil with a simple structure.

In addition, the present invention can provide a coil device in which the input / output line of the transmission / reception coil is fixed and the connection process with the external configuration for inputting / outputting signals is simple.

Further, the present invention can provide a coil device with high durability by preventing movement of input / output lines of a transmission / reception coil.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description 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 a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter of FIG.
4 is an exploded perspective view of a coil device according to an embodiment.
5 is a plan view of a coil frame of a coil device according to an embodiment.
6 is a top plan view of a coil device according to one embodiment.
7 is a side view of a coil device according to an embodiment.
8 is a bottom plan view of the coil device according to one embodiment.

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 wirelessly transmitting power, a wireless power receiving terminal 20 for receiving the transmitted power, and an electronic device 30 Lt; / RTI >

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 that used for wireless power transmission. In another example, the wireless power transmitting terminal 10 and the wireless power receiving terminal 20 perform out-of-band communication in which information is exchanged using a different frequency band different from the 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 the 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. In another embodiment, the in-band communication and the out-of-band communication may be provided.

 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 a running application, 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 may include a power conversion unit 210, a power transmission unit 220, a communication unit 230, a control unit 240, and a sensing unit 250 . It should be noted that the configuration of the wireless power transmitter 200 described above is not necessarily an essential configuration, and may be configured to include more or less components.

As shown in FIG. 2, when power is supplied from the power supply unit 260, the power conversion unit 210 may convert the power to a predetermined intensity.

For this, the power converter 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 260 into a DC power having a specific intensity according to a control signal of the controller 240.

At this time, the sensing unit 250 may measure the voltage / current of the DC-converted power and provide the measured voltage / current to the control unit 240. The sensing unit 250 may measure the internal temperature of the wireless power transmitter 200 and may provide the measurement result to the controller 240 in order to determine whether overheating occurs. For example, the control unit 240 may adaptively cut off the power supply from the power supply unit 250 or block the power supply to the amplifier 212 based on the voltage / current value measured by the sensing unit 250 . To this end, a power cutoff circuit may be further provided at one side of the power conversion unit 210 to cut off the power supplied from the power supply unit 250 or cut off the power supplied to the amplifier 212.

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 status information and / or the power control signal of the wireless power receiver through the communication unit 230 and may receive the power control information based on the received power reception status information and / So that the amplification factor of the amplifier 212 can be adjusted dynamically. 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 power transmission unit 220 may be configured to include a multiplexer 221 (or a multiplexer) and a transmission coil 222. [ In addition, the power transmitting unit 220 may further include a carrier generator (not shown) for generating a specific operating frequency for power transmission.

The carrier generator may generate a specific frequency for converting the output DC power of the amplifier 212 transmitted through the multiplexer 221 to AC power having a specific frequency. In the above description, the AC signal generated by the carrier generator is mixed with the output terminal of the multiplexer 221 to generate AC power. However, this is merely one embodiment, It should be noted that they may be mixed only or later.

2, the power transmission unit 220 includes a multiplexer 221 and a plurality of transmission coils 222 for controlling the output power of the amplifier 212 to be transmitted to the transmission coil, that is, Th to n < th > transmit coils.

The controller 240 according to the embodiment may transmit power through time division multiplexing for each transmission coil when a plurality of wireless power receivers are connected. For example, if the wireless power transmitter 200 has three wireless power receivers-i. E., The first through third wireless power receivers, respectively, identified through three different transmit coils, i. E. First through third transmit coils , The control unit 240 controls the multiplexer 221 so that power can be transmitted through a specific transmission coil in a specific time slot. At this time, the amount of power transmitted to the corresponding wireless power receiver can be controlled according to the length of the time slot allocated for each transmission coil, but this is only one embodiment. The amplification rate of the amplifier 212 of the wireless power receiver may be controlled to control the transmission power of each wireless power receiver.

The control unit 240 may control the multiplexer 221 so that the detection signals may be sequentially transmitted through the first through n'th transmit coils 222 during the first differential sense signal transmission procedure. At this time, the control unit 240 can identify the time at which the detection signal is transmitted using the timer 255. When the detection signal transmission time comes, the control unit 240 controls the multiplexer 221 so that the detection signal is transmitted through the corresponding transmission coil It can be controlled to be transmitted. For example, the timer 250 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 multiplexer 221 to transmit the corresponding event signal It is possible to control the digital ping to be transmitted through the coil.

In addition, the control unit 240 transmits a predetermined transmission coil identifier for identifying a signal strength indicator (Signal Strength Indicator) through a transmission coil from the demodulation unit 232 during the first detection signal transmission procedure, Lt; / RTI > received signal strength indicator. In the second sensing signal sending process, the controller 240 controls the multiplexer 221 so that the signal strength indicator can be transmitted only through the transmitting coil (s) You may. In another example, when there are a plurality of transmit coils in which the signal strength indicator is received during the first differential sense signal transmission procedure, the control unit 240 transmits the transmit coil, which receives the signal strength indicator having the largest value, In the procedure, the detection signal may be determined as a transmission coil to be transmitted first, and the multiplexer 221 may be controlled according to the determination result.

The modulator 231 may modulate the control signal generated by the controller 240 and transmit the modulated control signal to the multiplexer 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 error correction (EC) indicator for power control during wireless power transmission, an end of charge indicator (EOC), an overvoltage / overcurrent / overheat indicator, But is not limited to, various status information for identifying the status of the wireless power receiver.

The demodulating unit 232 may identify which of the transmitting coils the demodulated signal is received and may provide the controlling unit 240 with a predetermined transmitting coil identifier corresponding to the identified transmitting coil.

 In one example, the wireless power transmitter 200 may obtain the signal strength indicator through in-band communication that uses the same frequency used for wireless power transmission to communicate with the wireless power receiver.

In addition, the wireless power transmitter 200 can transmit wireless power using the transmit coil 222, as well as exchange various information with the wireless power receiver through the transmit coil 222. [ In another example, the wireless power transmitter 200 may further include a separate coil corresponding to each of the transmit coil 222 (i.e., first to n < th > transmit coils) It should be noted that it may also perform in-band communication with the receiver.

In the description of FIG. 2, the wireless power transmitter 200 and the wireless power receiver perform in-band communication. However, the wireless power transmitter 200 and the wireless power receiver use only the frequency band Directional communication through different frequency bands. For example, the near-end bi-directional communication may be any one of low-power Bluetooth communication, RFID communication, UWB communication, and Zigbee communication.

In particular, the transmitting coil 222 may be the coil device of Figs. 4 to 8 described later.

3 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter of FIG.

3, the wireless power receiver 300 includes a receiving coil 310, a rectifier 320, a DC / DC converter 330, a load 340, a sensing unit 350, 360, and a main control unit 370. Here, the communication unit 360 may include at least one of a demodulation unit 361 and a modulation unit 362.

Although the wireless power receiver 300 shown in the example of FIG. 3 is shown as being capable of exchanging information with a wireless power transmitter through in-band communication, this is only one embodiment, and in another embodiment The communication unit 360 may provide short-range bidirectional communication through a frequency band different from the frequency band used for wireless power signal transmission.

AC power received through the receiving coil 310 may be transmitted to the rectifying unit 320. The rectifier 320 may convert the AC power to DC power and transmit it to the DC / DC converter 330. The DC / DC converter 330 may convert the intensity of the rectifier output DC power to a specific intensity required by the load 340 and then deliver it to the load 340. Also, the receiving coil 310 may include a plurality of receiving coils (not shown), that is, first through n-th receiving coils. The frequency of the AC power transmitted to each of the reception coils (not shown) according to an embodiment may be different from each other, and another embodiment may include a predetermined frequency controller having a function of adjusting LC resonance characteristics for different reception coils The resonance frequencies of the respective receiving coils can be set differently.

In particular, the receiving coil 310 may be the coil device of Figs. 4 to 8 described later.

The sensing unit 350 may measure the intensity of the DC power output from the rectifier 320 and may provide the measured DC power to the main control unit 370. Also, the sensing unit 350 may measure the intensity of the current applied to the receiving coil 310 according to the wireless power reception, and may transmit the measurement result to the main control unit 370. Also, the sensing unit 350 may measure the internal temperature of the wireless power receiver 300 and provide the measured temperature value to the main control unit 370.

For example, the main controller 370 may compare the measured rectifier output DC power with a predetermined reference value to determine whether an overvoltage is generated. As a result of the determination, if an overvoltage occurs, a predetermined packet indicating that an overvoltage has occurred can be generated and transmitted to the modulator 362. Here, the signal modulated by the modulating unit 362 may be transmitted to the wireless power transmitter through the receiving coil 310 or a separate coil (not shown). The main control unit 370 may determine that the sensing signal is received when the intensity of the rectifier output DC power is equal to or greater than a predetermined reference value. When receiving the sensing signal, the signal intensity indicator corresponding to the sensing signal is received by the modulating unit 362 To be transmitted to the wireless power transmitter. The demodulation unit 361 demodulates the AC power signal between the reception coil 310 and the rectifier 320 or the DC power signal output from the rectifier 320 to identify whether or not the detection signal is received, (370). At this time, the main control unit 370 can control the signal strength indicator corresponding to the detection signal to be transmitted through the modulator 362. [

<Coil Apparatus According to an Embodiment>

4 is an exploded perspective view of a coil device according to an embodiment.

The coil device according to an embodiment may be a coil of at least one of a transmission coil of a wireless power transmission device or a reception coil of a wireless power reception device. Further, the present invention is not limited to a wireless power transmission apparatus, and can be applied to an apparatus using a coil for wirelessly transmitting an induced electromotive force.

Referring to FIG. 4, the coil device according to an embodiment may include a plurality of coils. The plurality of coils may be a plurality of transmission coils of the wireless power transmission device or a plurality of reception coils of the wireless power reception device. Further, the plurality of coils may be wound with the same number of turns. But may be wound in different numbers of turns. Further, the plurality of coils may have the same inductance. The present invention is not limited thereto and different inductances may be provided. Further, the plurality of coils may be arranged in one or more layers. More specifically, the plurality of coils may include a first coil 410 to a third coil 430. The second coil 420 and the third coil 430 may be disposed in the first layer disposed in the same layer. The first coil 410 may be disposed on the second layer disposed on the second coil 420 and the third coil 430. Accordingly, the coil device according to one embodiment can expand the charging area to efficiently transmit radio power by arranging the plurality of coils in different layers.

In addition, the plurality of coils may include first and second connection portions in which AC signals are input or output, respectively. The first and second connections may be wires or cables coated with a coating. The first and second connections may be connected to a configuration external to the coil device. For example, in the case of a wireless power transmitter, the first and second connections may be connected to the power converter or the multiplexer directly or via a terminal. In the case of a wireless power receiver, the first and second connections may be connected to the rectifier either directly or via a terminal. More specifically, the first coil 410 may include a 1-1 connection portion 411 and a 1-2 connection portion 412. The 1-1 connection portion 411 may extend from a coil line disposed inside the first coil 410. The 1-2 connecting portion 412 may extend from a coil line disposed outside the first coil 410. The connecting portion 411 is extended from the outer coil wire of the first coil 410 and the connecting portion 412 is extended from the inner coil wire of the first coil 410 . The second coil 420 may include a second-1 connecting portion 421 and a second-2 connecting portion 422. The second-1 connection portion 421 may extend from a coil line disposed inside the second coil 420. The second-second coupling portion 422 may extend from a coil line disposed outside the second coil 420. And the second-second connecting portion 422 is extended from the inner coil line of the second coil 420 and the second-second connecting portion 422 is extended from the inner coil wire of the second coil 420, . The third coil 430 may include a 3-1 connection unit 431 and a 3-2 connection unit 432. The third connection part 431 may extend from a coil line disposed outside the third coil 430. The third-second coupling portion 432 may extend from a coil line disposed inside the third coil 430. [ The third coil 431 is extended from the inner coil wire of the third coil 430 and the third coil connecting portion 432 is extended from the outer coil wire of the third coil 430, .

In addition, each of the first and second connecting lines of the plurality of coils may be arranged to extend from each coil in the same direction on one side of the coil device. More specifically, each of the first and second connection lines of the plurality of coils may extend in the direction of the cable fixing portion 550 disposed on one side of the coil frame 500. For example, the first 1-1 coupling portion 411 and the 1-2 coupling portion 412 of the first coil 410, the 2-1 coupling portion 421 of the second coil 420, The third-side connecting portion 431 and the third-second connecting portion 432 of the third coil 430 and the third coil 430 extend in the direction of the cable fixing portion 550 disposed at one side of the coil frame 500 .

The coil device according to one embodiment may include a coil frame 500.

The coil frame 500 may include an upper storage portion 520 in which coils are disposed. The upper storage portion 520 may be disposed on the outer peripheral portion 511 of the coil frame 500. The upper storage portion 520 may be an opening or a recessed shape. For example, as shown in FIG. 4, the first coil 410 may be disposed in the opening-shaped upper storage part 520. Further, when the upper storage portion 520 is in the shape of an opening, the upper storage portion 520 may include at least one coil support portion 521 for supporting the coil. For example, the first coil 410 disposed in the opening-shaped upper storage portion 520 may be disposed in contact with the upper surface of the coil support portion 521.

In addition, the coil frame 500 may include a lower storage portion 530. The lower storage portion 530 may be formed by the outer peripheral portion 511 and the inner side portion 513 of the coil frame 500. The lower storage portion 520 can accommodate the coil, the shielding material 600, or the heat-radiating sheet 700. For example, as shown in FIG. 4, the lower housing part 530 includes the second coil 420 and the third coil 430 disposed on the same layer, and the shielding material 600 covers the second coil 420 and the third coil 430, The heat radiating sheet 700 can be disposed on the lower layer of the shielding material 600 and housed therein.

The coil frame 500 according to one embodiment may include a coil frame fixing portion 540. The coil frame fixing portion 540 may have a shape protruding from the outer side portion 512 at an edge of the coil frame 500. The coil frame fixing portion 540 may include a coil frame fixing hole 541 for fixing the coil frame fixing portion 540 to an external device. That is, screws, bolts, nuts, fixing rods, or the like can be inserted into the coil frame fixing holes 541 to mount or place the coil device in an external device.

The coil frame 500 according to one embodiment may include a cable securing portion 550. The cable fixing portion 550 can fix the connection portion of the coil. The cable fixing portion 550 will be described later in detail.

The coil device according to one embodiment may include a shielding material 600. The shielding material 600 may be disposed in the lower housing part 530 of the coil frame 500. The shielding member 600 may be disposed on the lower surface of the plurality of coils. The shielding member 600 can guide the wireless power generated from the plurality of coils disposed in the upper portion in the charging direction and protect various circuits disposed below from the electromagnetic field. The shielding member 600 may include a 1-1 fastening hole 610 and a 1-2 fastening hole 620 for separating or preventing movement in the coil device.

The coil device according to one embodiment may include a heat-radiating sheet 700. The heat-radiating sheet 700 may be disposed in the lower storage portion 530 of the coil frame 500. The heat-radiating sheet 700 may be disposed on the lower surface of the shielding member 600. The heat-radiating sheet 700 can radiate heat to the outside of the coil device when heat generated from the plurality of coils is transmitted through the shielding material 600. The heat-radiating sheet 700 may be made of a material having a high thermal conductivity or a high thermal emissivity. The heat-radiating sheet 700 may include a second-1 fastening hole 710 and a second-2 fastening hole 720 to separate or prevent movement in the coil device.

5 is a plan view of a coil frame of a coil device according to an embodiment.

5 is a view for explaining a cable fixing part 550 of the coil frame 500. FIG.

Referring to FIG. 5, the cable fixing portion 550 may fix the connection portion extending from the plurality of coils to prevent movement of the coil or the connection portion. In addition, since the cable fixing portions 550 can arrange and connect the connection portions of the coils in a line or regularly, it is possible to facilitate the electrical connection process between the connection portion and the external power source configuration. The cable fixing portion 550 may be disposed at one side portion 512 of the coil frame 500. The cable fixing portion 550 can be integrated with the coil frame 500 by injection molding.

The cable fixing part 550 may include a plurality of guide parts 551, a cable supporting part 554 or a lead-in part 555 having a first projection part 552 and a second projection part 553.

The guide portion 551 can separate a plurality of connecting portions from each other and fix each connecting portion.

More specifically, the guide portion 551 may include a first protrusion 552 protruding in a first direction between one end of the outer side and the other end of the inner side. More specifically, the first projection 552 may be located in the center of the guide portion 551 or may correspond to the cable support 554 and may protrude in a first direction that is the direction of the neighboring guide portion 551 . In addition, the first projecting portion 552 may protrude in parallel with the cable supporting portion 554. The protrusion 552 may have a triangular shape, a square shape, a rhombus shape, a saw tooth shape, a round shape, or the like. The shape of the first protrusion 552 may be determined depending on the material, thickness, etc. of the connection portion.

The guide portion 551 may include a second protrusion 553 protruding in a second direction that is opposite to the first direction, which is located at one end of the outer side. More specifically, the second projection 552 may be located at one end of the guide portion 551 and may protrude in a second direction, which is the direction of the adjacent other guide portion 551. In addition, the second projection 552 may protrude in parallel with the cable support 554. The second projection 553 may have a protruding shape of a triangular shape, a square shape, a rhombus shape, a saw tooth shape, a round shape, or the like. The shape of the second protrusion 553 may be determined depending on the material, thickness, etc. of the connection portion. The shape of the first protrusion 553 and the shape of the second protrusion 553 may be the same. The shape of the first protrusion 553 and the shape of the second protrusion 553 can be made different from each other.

One end of the guide portion 551 may protrude from the outer side portion 512 of the coil frame 500. For example, the outer side of the guide portion 551 may protrude from the outer side portion 512 by a first distance a. Thus, the guide portion 5510 can secure a sufficient thickness for the second projection 553 to protect the connection portion. The outer side of the guide portion 551 may protrude by a distance equal to or smaller than that of the coil frame fixing portion 540 protruded from the outer side portion 512.

The guide portion 551 may have a guide length at the other end inside from the outer end, and the other end of the guide portion 551 may be spaced apart from the upper storage portion 520 by a predetermined distance. For example, the guide portion 551 may be disposed such that the other end of the guide portion 551 is extended from the outer side portion 512 of the coil frame 500 by a second distance b that is the guide length in the inward direction. Accordingly, the guide portion 551 can be arranged in the direction of the first protrusion 552 for separating the plurality of connection portions by a sufficient distance from each other and fixing the connection portion. The guide portion 551 may be disposed such that the other end of the guide portion 551 is spaced apart from the upper storage portion 520 by a third distance c in the outward direction. Therefore, the guide portion 551 prevents sudden bending of the connecting portion extending from each coil, thereby preventing the resistance from increasing.

The cable support portion 554 can support the connection portion so that the connection portion does not move in the downward direction of the cable fixing portion 550. The cable supporting portion 554 can be fixed together with the first projection 552 so as not to move in the vertical direction or the left-right direction of the connection portion. In addition, the cable support 554 may be disposed in correspondence with the first projection 552. More specifically, the cable support 554 may be disposed parallel to the projecting direction of the first projection 552. [

The lead-in portion 555 may be disposed outside the cable fixing portion 550 to allow the connection portion to be inserted. The lead-in portion 555 may be formed by an outer end of the other lead portion 551 adjacent to the second lead portion 552 of the guide portion 551. That is, the lead-in portion 555 may be formed such that the second projecting portion 552 of one guide portion 551 and the other end of the other lead portion 551 adjacent to the lead portion 551 are spaced apart from each other by the thickness of the connection portion. The lead-in portion 555 may be an insertion path for placing the connection portion between the second projection 553 and the cable support portion 554 when the connection portion is fixed to the cable fixing portion 550.

FIG. 6 is a top plan view of a coil device according to an embodiment, FIG. 7 is a side view of a coil device according to an embodiment, and FIG. 8 is a bottom plan view of a coil device according to an embodiment.

6 is a view for explaining a state in which a plurality of coils are fixed to the cable fixing portion 550 of the coil frame 500. FIG.

6, the first 1-1 coupling portion 411 and the 1-2 coupling portion 412 of the first coil 410, the 2-1 coupling portion 421 of the second coil 420 and the 2- 2 connecting portion 422 of the third coil 430 and the 3-1 connecting portion 431 and the 3-2 connecting portion 432 of the third coil 430 may be fixedly secured to the cable fixing portion 550 of the coil frame 500 .

For example, the first 1-1 coupling portion 411 of the first coil 410 may be disposed between the first guide portion 1551 and the second guide portion 1552. The 1-1 connection portion 411 contacts the first 1-1 protrusion portion 1552 and the second guide portion 1551 of the first guide portion 1551 and the movement in the left and right direction can be fixed. In addition, as shown in FIG. 8, the first connecting portion 411 may contact the cable supporting portion 554 and move downward. 7, the 1-1 connecting portion 411 is extended in the downward direction of the coil device or in the direction of the external device (not shown) by the 2-2 protrusion 1553 of the second guide portion 1552 Can be fixed. The 1-1 connection portion 511 is in contact with the cable support portion 554, the 1-1 protrusion portion 1552, and the 2-2 protrusion portion 1553, respectively, to prevent vertical and lateral movement. Similarly, the first-second connecting portion 412 of the first coil 410, the second-1 connecting portion 421 and the second-2 connecting portion 422 of the second coil 420, the third coil 430 The third-third connecting portion 431 and the third-second connecting portion 432 of the coil frame 500 may be fixed to the cable fixing portion 550 of the coil frame 500.

Referring to FIG. 8, the coil device may include one or more member fixing portions. For example, the member fixing portion may include a first member fixing portion 561 and a second member fixing portion 562. [ The member fixing part may be integrally formed with the coil frame 500 or may have a separate structure. The member fixing portion can fix the shielding member 600 or the heat radiation sheet 700. For example, the first member fixing portion 710 may be inserted through the first-1 fixing hole 610 of the shielding material 600 and the second-1 fixing hole 710 of the heating sheet 700 in order have. The second member fixing portion 720 may be inserted through the first-second fixing hole 620 of the shielding material 700 and the second-second fixing hole 720 of the heating sheet 700 in order. Further, in the case of a plurality of member fixing portions, the size of the member fixing portions may be different from each other. Thus, it is possible to prevent the coil frame from being disposed in the wrong direction in the process of placing the coil frame on the coil device. For example, the first member fixing portion 710 may be larger than the second member fixing portion 720 directly.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

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.

10 Wireless Power Transmitter
20 wireless power receiver
410 first coil
411 and 412,
420 second coil
421, 422,
430 third coil
431 and 432,
500 coil frame
540 coil frame fixing portion
550 cable fixing portion
561, 562 member fixing portion
600 Shielding material
700 heat-radiating sheet

Claims (10)

First to third coils having connection portions; And
And a coil frame including an upper accommodating portion for accommodating the first coil, a lower accommodating portion for accommodating the second and third coils, and a cable fixing portion for fixing the connection portions of the first to third coils Coil device. The method according to claim 1,
Wherein the cable fixing portion includes a plurality of guide portions,
Wherein each of the plurality of guide portions includes a first protrusion protruded in a first direction and fixes each connection portion of the first through third coils by a guide portion adjacent to the first protrusion. 3. The method of claim 2,
Wherein the cable fixing portion further includes a cable supporting portion corresponding to the first projection,
And the respective connecting portions of the first to third coils are fixed by the cable supporting portion and the first projecting portion. 3. The method of claim 2,
Wherein each of the plurality of guide portions includes a second projection projected in a second direction,
And the second protrusions guide the connection portions of the first to third coils so as to extend in the downward direction. The method according to claim 1,
And the cable fixing portion is protruded from the outer side of the coil frame. The method according to claim 1,
Wherein the coil frame further comprises a coil frame securing portion at an edge,
Wherein the distance projected from the outer side of the cable fixing part is equal to or less than the distance protruding from the outer side of the coil frame fixing part. The method according to claim 1,
And the cable fixing portion is disposed apart from the upper storage portion. The method according to claim 1,
A shielding member disposed below the second coil and the third coil and received in the lower housing portion,
And a heat radiation sheet disposed below the shield member and received in the lower housing part. A first coil, a second coil, and a third coil, the first coil, the second coil, and the third coil, the first coil, the second coil, and the third coil having the connection portion, the upper storage portion storing the first coil, the lower storage portion storing the second and third coils, A coil unit including a coil frame including a fixed portion; And
And a drive circuit connected to the first to third coils. A first coil, a second coil, and a third coil, the first coil, the second coil, and the third coil, the first coil, the second coil, and the third coil having the connection portion, the upper storage portion storing the first coil, the lower storage portion storing the second and third coils, A coil unit including a coil frame including a fixed portion; And
And a control circuit connected to the first to third coils.

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