KR20210023499A - Wireless power transmission apparatus and wireless power reception apparatus - Google Patents

Abstract

The present invention relates to a wireless power transmission apparatus and a wireless power reception apparatus. According to one embodiment of the present invention, the wireless power transmission apparatus includes: a power transmission unit including a transmission coil; a first communication unit that communicates with a wireless power reception apparatus through the transmission coil; a second communication unit that wirelessly communicates with at least one access point; a memory for storing authentication data; and a control unit, wherein the control unit receives data related to authentication from the wireless power reception apparatus through the first communication unit, performs authentication on the wireless power reception apparatus based on the authentication data stored in the memory and the data related to the authentication received from the wireless power reception apparatus, transmits a power to the wireless power reception apparatus through the power transmission unit when the authentication is successful, requests transmission of data on the at least one access point to the wireless power reception apparatus through the first communication unit when the data on the at least one access point is not stored in the memory, and performs wireless communication with the at least one access point through the second communication unit when the data on the at least one access point is received from the wireless power reception apparatus. Accordingly, the data on the access point is transmitted to and received from an authenticated device safely and simply. Various other embodiments are possible.

Description

A wireless power transmission device and a wireless power reception device {WIRELESS POWER TRANSMISSION APPARATUS AND WIRELESS POWER RECEPTION APPARATUS}

The present invention relates to a wireless power transmission apparatus and a wireless power reception apparatus, and more particularly, to a wireless power transmission apparatus and a wireless power reception apparatus capable of transmitting and receiving data for an access point (AP) with each other.

In general, when power is supplied to an electronic device, a terminal supply method of supplying commercial power by connecting a physical cable or wire to the electronic device is used. In such a terminal supply method, cables or wires occupy a considerable space, are not easy to arrange, and there is a risk of disconnection.

Recently, in order to solve this problem, research on a wireless power transmission method has been discussed.

The wireless power transmission system may include a wireless power transmission device that supplies power through a single coil or multiple coils, and a wireless power reception device that receives and uses power wirelessly supplied from the wireless power transmission device.

In general, a wireless power receiving device is an electronic device that can use the Internet by accessing a WiFi network (Wi-Fi Network, or WLAN: Wireless Local Area Network), for example, a mobile phone, a laptop computer. ), it may be an electronic device such as a tablet PC (tablet computer). Here, the WiFi network is a local area communication network capable of accessing the Internet within a certain distance of a place where an access point is installed using a relay device, that is, an access point (AP).

On the other hand, as in the prior art 1 (Korean Patent Laid-Open No. 10-2015-0011445), a general wireless power transmission device communicates with a wireless power receiver and transmits power. Do not connect to

KR 10-2015-0011445 A

An object of the present invention is to provide a wireless power transmission device and a wireless power reception device capable of safely transmitting and receiving data for an access point with an authenticated device based on authentication data and easily accessing the access point.

In order to achieve the above object, a wireless power transmission device according to an embodiment of the present invention includes a power transmission unit including a transmission coil, a first communication unit communicating with a wireless power reception device through a transmission coil, and at least one access point. A second communication unit for wireless communication with the (access point), a memory for storing authentication data, and a control unit, wherein the control unit receives authentication data from the wireless power receiving device through the first communication unit, and authentication data stored in the memory And, based on the authentication data received from the wireless power receiving device, authentication for the wireless power receiving device is performed, and if the authentication is successful, power is transmitted to the wireless power receiving device through the power transmitter, and at least one When the data for the access point is not stored in the memory, a request for data transmission for at least one access point to the wireless power receiving device through the first communication unit, and for at least one access point from the wireless power receiving device When data is received, wireless communication with at least one access point may be performed through the second communication unit.

In order to achieve the above object, a wireless power receiving apparatus according to an embodiment of the present invention includes a power receiving unit having a receiving coil, a first communication unit communicating with the wireless power transmitting apparatus through the receiving coil, and at least one access point ( access point) and a second communication unit for wireless communication, a memory for storing authentication data, and a control unit, wherein the control unit receives authentication data from the wireless power transmission device through the first communication unit, and includes authentication data stored in the memory and Based on the authentication data received from the wireless power transmission device, authentication for the wireless power transmission device is performed, and when authentication is successful, power is received from the wireless power transmission device through the power receiver, and at least one access point When the data for is stored in the memory, data for at least one access point is encrypted, and if authentication is successful, it may be determined whether to transmit the encrypted data to the wireless power transmission device through the first communication unit.

According to various embodiments of the present disclosure, power can be safely transmitted and received with an authenticated device based on authentication data.

According to various embodiments of the present disclosure, in addition to performing an operation for power transmission/reception, data on an access point can be safely and conveniently transmitted/received with an authenticated device.

1 is a block diagram illustrating a wireless power system according to an embodiment of the present invention.
2 is an internal block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
3A and 3B are internal block diagrams of an apparatus for receiving wireless power according to an embodiment of the present invention.
4 is a flowchart illustrating a wireless power transmission method of a wireless power transmission apparatus according to an embodiment of the present invention.
5 is a flowchart illustrating a method of operating a wireless power transmission apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a method of operating a wireless power receiving apparatus according to an embodiment of the present invention.
7 and 8 are flowcharts illustrating a method of operating devices included in a wireless power system according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the drawings, in order to clearly and briefly describe the present invention, illustration of parts irrelevant to the description is omitted, and the same reference numerals are used for identical or extremely similar parts throughout the specification.

The suffixes "module" and "unit" for the constituent elements used in the following description are given in consideration of only the ease of writing in the present specification, and do not impart a particularly important meaning or role by themselves. Therefore, the "module" and "unit" may be used interchangeably with each other.

In this application, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of possibilities, or the presence or addition of numbers, steps, actions, components, parts, or combinations thereof, is not to be understood in advance.

In addition, in the present specification, terms such as first and second may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

1 is a block diagram illustrating a wireless power system according to an embodiment of the present invention.

Referring to FIG. 1, the wireless power system 10 includes, for example, a wireless power transmission device 100 for wirelessly transmitting power, a wireless power reception device 200 for receiving transmitted power, and/or at least one It may include an access point 300 of.

The wireless power transmission device 100 is a magnetic induction phenomenon in which a current is induced in the coil 281 provided in the wireless power receiving device 200 according to, for example, a change in a magnetic field due to a current flowing through the coil 181 By using, power may be wirelessly transmitted to the wireless power receiving apparatus 200.

In this case, the wireless power transmission device 100 and the wireless power receiving device 200 may use, for example, a wireless charging method of an electromagnetic induction method defined by a Wireless Power Consortium (WPC) or a Power Matters Alliance (PMA). .

Alternatively, the wireless power transmission device 100 and the wireless power reception device 200 may use a magnetic resonance wireless charging method defined in Alliance for Wireless Power (A4WP), for example.

Hereinafter, in order to distinguish between the coil 181 provided in the wireless power transmission device 100 and the coil 281 provided in the wireless power receiving device 200, the coil 181 provided in the wireless power transmission device 100 ) May be referred to as a transmitting coil, and the coil 281 provided in the wireless power receiving apparatus 200 may be referred to as a receiving coil.

According to an embodiment, one wireless power transmission device 100 may transmit power to a plurality of wireless power reception devices 200. In this case, the wireless power transmission device 100 may transmit power to the plurality of wireless power reception devices 200 according to, for example, a time division method, but the present invention is not limited thereto, and a plurality of wireless power reception devices (200) It is also possible to transmit power to a plurality of wireless power receiving apparatuses 200 using different frequency bands allocated to each of them.

Meanwhile, the number of wireless power receiving devices 200 capable of receiving power from one wireless power transmitting device 100 is, for example, a required amount of power and wireless power transmission of each of the plurality of wireless power receiving devices 200. It may be adaptively determined in consideration of the amount of available power of the device 100 and the like.

According to another embodiment, a plurality of wireless power transmission devices 100 may transmit power to at least one wireless power reception device 200. In this case, the at least one wireless power receiving device 200 may be simultaneously connected to, for example, a plurality of wireless power transmitting devices 100, and may simultaneously receive power from the connected wireless power transmitting device 100. .

On the other hand, the number of wireless power transmission devices 100 may be adaptively determined in consideration of, for example, the required power amount of each of the at least one wireless power receiving device 200 and the available power amount of the wireless power transmission device 100. I can.

The apparatus 200 for receiving power wirelessly may receive power transmitted from the apparatus 100 for transmitting power wirelessly, for example.

For example, the wireless power receiving apparatus 200 includes a wearable device such as a mobile phone, a laptop computer, a tablet PC, and a smart watch, and personal digital assistants (PDAs). , Portable Multimedia Player (PMP), navigation, MP3 player, electric toothbrush, lighting device, and may be an electronic device such as a remote control, but the present invention is not limited thereto, and any electronic device capable of charging a battery is sufficient.

The wireless power transmission device 100 and the wireless power reception device 200 may communicate with each other, for example. Depending on the embodiment, the wireless power transmission apparatus 100 and the wireless power reception apparatus 200 may perform one-way communication or half-duplex communication.

In this case, the communication method is an in-band communication method using the same frequency band as the operating frequency used for wireless power transmission and/or out using a frequency band different from the operating frequency used for wireless power transmission. It may be an out-of-band communication method.

On the other hand, the data transmitted and received between the wireless power transmission device 100 and the wireless power receiving device 200 is data about the state of the device, data about power usage, data about battery charging, the output voltage of the battery, and/or Alternatively, data related to the output current, data related to a control command, data related to authentication, and the like may be included.

The access point 300 may be, for example, a network auxiliary device that enables a device connected to the access point 300 to communicate through a network connected to the access point 300. For example, the access point 300 may be a wireless LAN access point that allows a device connected to the access point 400 to use the wireless Internet through a wireless LAN.

The access point 300 may be, for example, a network auxiliary device having a pre-allocated SSID (Service Set Identifier), a MAC address (Media Access Control Address), and a password for accessing the access point 300. have.

The wireless power transmission device 100 and/or the wireless power reception device 200 may perform communication with, for example, the access point 300.

For example, the wireless power transmission device 100 and/or the wireless power reception device 200 may access the access point 300 based on data (hereinafter, AP data) for the access point 300, and , It is possible to access the Internet through the access point 300. Here, the AP data may include, for example, an SSID, a password, a MAC address, and the like.

For example, the access point 300 may periodically generate a beacon frame and transmit it in a broadcast manner.

In this case, the wireless power transmission device 100 and/or the wireless power reception device 200 may receive, for example, a beacon frame output from at least one access point 300, based on the received beacon frame. Thus, the presence of the access point 300 may be detected, and this may be defined as passive scanning.

Meanwhile, the wireless power transmission apparatus 100 and/or the wireless power reception apparatus 200 may store, for example, AP data of the access point 300 having a history of previously accessing. In this case, the wireless power transmission device 100 and/or the wireless power reception device 200 may select any one of stored AP data, which may be defined as active scanning.

The wireless power transmission device 100 and/or the wireless power reception device 200 requests access to the corresponding access point using, for example, an SSID and a password for any one of the at least one access point 300. I can.

At this time, the access point 300, in accordance with the connection request received from the wireless power transmission device 100 and/or the wireless power reception device 200, the wireless power transmission device 100 and/or the wireless power reception device 200 ) Can be approved.

2 is an internal block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the wireless power transmission device 100 includes, for example, a control unit 160 for controlling each component provided in the wireless power transmission device 100, and a wireless power driver for converting DC power into AC power. 170 and a power transmission unit 180 for wirelessly transmitting power by using the converted AC power.

In addition, the wireless power transmission device 100 includes, for example, a converter 110 that converts the commercial AC power source 405 into a DC power source, a memory storing a control program for driving the wireless power transmission device 100, and the like. 120, a sensing unit 130 for sensing a current and/or voltage input to a configuration provided in the power transmission unit 180, a first communicating with the wireless power receiving device 200 according to a predetermined communication method And a third communication unit 150 communicating with the second communication units 140 and 145 and/or the access point 300.

The converter 110 may rectify and output the input AC power to DC power, for example. In this case, the AC power may be, for example, a single-phase AC power or a three-phase AC power. For example, each component included in the wireless power transmission apparatus 100 may be operated by DC power output from the converter 110.

In the drawings, the commercial AC power source 405 is shown as a single-phase AC power source, but the present invention is not limited thereto, and may be a three-phase AC power source. Meanwhile, the internal structure of the converter 110 may also vary according to the type of the commercial AC power source 405.

The converter 110 may include, for example, a bridge diode. For example, a pair of upper-arm diode elements and lower-arm diode elements, each connected in series with each other, may be a pair, and a total of two or three pairs of upper-arm diode elements may be connected in parallel with each other. Meanwhile, the converter 110 may further include, for example, a plurality of switching elements.

The memory 120 may store various data for the overall operation of the wireless power transmission device 100, such as, for example, a program for processing or controlling the controller 160.

The memory 120 may include, for example, authentication data. Here, the authentication data may be data related to Qi authentication, which is an interface standard provided by WPC (Wireless Power Consortium), but the present invention is not limited thereto, and may include various data for authentication. .

For example, the memory 120 may store authentication data for the wireless power transmission device 100.

The memory 120 may store, for example, AP data of at least one access point 300. For example, the memory 120 may store an SSID, a password, a MAC address, and the like of the access point 300.

The sensing unit 130 may sense, for example, a current input to the power transmission unit 180, a voltage, a temperature of the transmission coil 181, and the like. For example, when the power transmission unit 180 includes a transmission coil 181 and a capacitor connected to the transmission coil 181, the sensing unit 130 may have a voltage V1 applied to both ends of the coil and the capacitor. ) And the voltage V2 applied to both ends of the coil can be detected.

The first and second communication units 140 and 145 may communicate with, for example, the wireless power receiving apparatus 200.

The first communication unit 140 may communicate with, for example, a first communication method. The first communication unit 140 may transmit a signal including, for example, data on the state of the device, data on power usage, and the like to the wireless power receiving device 200, and from the wireless power receiving device 200 A signal including data on the state of the device, data on power usage, data on battery charging, data on authentication, and the like may be received.

The second communication unit 145 may communicate with the wireless power receiving apparatus 200 through a second communication method different from the first communication method, for example. The second communication unit 150 may transmit a signal including, for example, data on the state of the device, data on power usage, and the like to the wireless power receiving device 200, and from the wireless power receiving device 200 A signal including data on the state of the device, data on power usage, data on battery charging, data on authentication, and the like may be received.

The first and second communication units 140 and 150 are, for example, for modulating/demodulation of a signal transmitted from the wireless power transmission device 100 and a signal received from the wireless power receiving device 200, It may further include a modem unit (not shown).

The first and second communication units 140 and 150 may further include, for example, a filter unit (not shown) that filters a signal received from the wireless power receiving apparatus 200. In this case, the filter unit may include, for example, a band pass filter (BPF).

Meanwhile, the first communication method may be, for example, an in-band communication method. For example, when the first communication unit 140 communicates in an in-band communication method, the first communication unit 140 and the power transmission unit 180 may be implemented in one configuration, and the first The communication unit 140 may communicate with the wireless power receiving apparatus 200 through the transmission coil 181.

Meanwhile, the second communication method may be, for example, an out-of-band communication method. For example, when the second communication unit 150 communicates with an out-of-band communication method, the second communication unit 150 and the power transmission unit 180 may be implemented in separate configurations from each other. In addition, the second communication unit 150 may communicate with the wireless power receiving apparatus 200 through a separate communication module.

According to an embodiment, a communication module used in an out-of-band communication method is a short range such as Bluetooth, Zigbee, wireless LAN, and NFC (Near Field Communication). A communication method may be used, but the present invention is not limited thereto.

Meanwhile, the communication method used in the wireless power transmission apparatus 100 may be changed to at least one of the first and second communication methods based on, for example, data on the wireless power receiving apparatus 200.

The third communication unit 150 may communicate with an external device, for example. The third communication unit 150 may communicate with, for example, the access point 300. For example, the third communication unit 150 may include a WiFi communication module, but the present invention is not limited thereto.

The controller 160 may be connected to each component provided in the wireless power transmission apparatus 100, for example.

The controller 160 may transmit/receive signals to and from each component provided in the wireless power transmission apparatus 100, for example, and control the overall operation of each component.

The control unit 160 generates a driving signal Sic based on, for example, a PWM generator 160a that generates a pulse width modulation (PWM) signal and a PWM signal to generate a wireless power driver. A driver 160b outputting to 170 may be provided.

The wireless power driver 170 may include at least one switching element (not shown) for converting DC power into AC power, for example. For example, when the switching element is an insulated gate bipolar transistor (IGBT), the driving signal Sic output from the driver 160b may be input to the gate terminal of the switching element.

Meanwhile, the switching element provided in the wireless power driver 170 may perform a switching operation according to, for example, a driving signal Sic, and DC power is converted into AC power by the switching operation of the switching element. , May be output to the power transmission unit 180.

The wireless power driver 170 may include, for example, an inverter (not shown) including a plurality of switching elements.

The power transmission unit 180 may include, for example, a transmission coil 181.

The transmission coil 181 may include, for example, a round shape, a circular sector shape, a triangular shape, or a polygonal shape such as a square shape, but is not limited thereto.

The power transmission unit 180 may include, for example, a plurality of transmission coils 181. For example, the plurality of transmission coils 181 may be disposed adjacent to each other, or may be disposed on the same plane. Meanwhile, the plurality of transmission coils 181 may be partially overlapped, for example.

On the other hand, the transmission coil 181, for example, is spaced apart from the reception coil 281 provided in the wireless power reception device 200, the leakage inductance is high, the coupling factor (coupling factor) is low, so transmission efficiency is It can be low.

In order to solve this problem, the power transmission unit 180 provided in the wireless power transmission apparatus 100 according to various embodiments of the present invention includes, for example, a capacitor element connected to the transmission coil 181 (not shown). ) May be further included.

For example, a capacitor element may be connected in series to the transmitting coil 181, and according to an embodiment, a capacitor element may be connected in parallel to the transmitting coil 181 to form a resonance circuit.

The power transmission unit 180 may determine, for example, a resonant frequency of power transmission.

The resonance frequency may be determined, for example, according to Equation 1 below.

The resonance frequency f may be determined by, for example, the inductance L and the capacitance C of the transmission coil 181. For example, the inductance L may be determined according to the number of rotations of the transmitting coil 181, and the capacitance C may be determined according to the area of the transmitting coil 181.

The power transmission unit 180 may be configured such that a capacitor element is connected to a plurality of transmission coils 181, for example, to determine a resonant frequency of power transmission.

The power transmission unit 180 may further include, for example, a shielding material (not shown) disposed on one side of the plurality of transmission coils 181 and shielding a leaked magnetic field.

The shielding material is, for example, ferrite consisting of one or a combination of two or more elements selected from the group consisting of cobalt (Co), iron (Fe), nickel (Ni), boron (B), silicon (Si), etc. It may include. The shielding material is disposed on one side of the plurality of transmission coils 181, for example, to shield a leaking magnetic field and maximize the directionality of the magnetic field.

The shielding material may be composed of, for example, a soft magnetic material that is easy to demagnetize and has a low hysteresis loss.

The shielding material may be larger than an area in which the plurality of transmission coils 181 are disposed so that, for example, a leakage magnetic field is reduced and a directionality of the magnetic field is maximized.

The control unit 160 may transmit and receive signals through, for example, a transmission coil 181 provided in the power transmission unit 180.

The control unit 160 is provided in the wireless power transmission device 100 to output an object detection signal for determining the existence of an object located in the charging area through the transmission coil 181, for example. Each configuration can be controlled. Here, the charging area may mean, for example, an area corresponding to the power transmission unit 180 of the outer surface of the housing of the wireless power transmission device 100, and the wireless power receiving device 200 is in contact with the charging area. Alternatively, power can be received by being located within a predetermined distance. For example, the charging area may be an area corresponding to the plurality of transmission coils 181 provided in the power transmission unit 180.

The object detection signal may be, for example, a very short pulsed analog ping (AP) signal.

The controller 160 may determine whether an object exists in the charging area based on, for example, an amount of change in the current flowing through the transmission coil 181 according to the output of the object detection signal.

The control unit 160 is provided in the wireless power transmission device 100 so that a reception device detection signal is output for awakening the wireless power reception device 200, for example, through the transmission coil 181. Each configuration can be controlled. The reception device detection signal may be, for example, a digital ping (DP) signal.

The digital ping (DP) signal may have a higher duty than the analog ping (AP) signal in order to attempt to establish communication with the wireless power receiving apparatus 200, for example.

Meanwhile, the controller 160 may receive, for example, a response signal to a reception device detection signal output from the wireless power reception device 200 through the transmission coil 181. For example, the wireless power receiver 200 may modulate a digital ping (DP) signal and transmit the modulated digital ping (DP) signal as a response signal to the wireless power transmission device 100 have.

The controller 160 may determine whether the object located in the charging area is the wireless power receiving device 200 based on, for example, a response signal to the receiving device detection signal. For example, the controller 160 may obtain digital data by demodulating the modulated digital ping (DP) signal received as a response signal, and based on the acquired data, the charging area It may be determined whether the positioned object is the wireless power receiving device 200.

The control unit 160 may calculate, for example, a quality factor (Q) of the transmission coil 181.

For example, the control unit 160 includes a voltage V1 applied to the transmitting coil 181 and the capacitor connected to the transmitting coil 181 through the sensing unit 130, and at both ends of the transmitting coil 181. The applied voltage V2 may be detected, and a quality factor of the transmitting coil 181 may be calculated based on this.

Specifically, when a frequency sweep is performed from a low frequency to a high frequency within the operating frequency (or available frequency) band, the voltage V1 applied to the coil and the capacitor does not change despite the frequency sweep. Usually, however, it may decrease somewhat at the point of the presence of an object in the charging area. Meanwhile, the voltage V2 applied to both ends of the coil may be changed to gradually increase and then decrease according to, for example, a frequency sweep.

The control unit 160 may calculate a quality factor of the transmission coil 181 according to Equation 2 below, for example.

The controller 160 may control each component included in the wireless power transmission device 100 and transmit power to the wireless power reception device 200 through the power transmission unit 180, for example.

The controller 160 may communicate with the wireless power receiving apparatus 200 through at least one of the first and second communication units 140 and 145, for example.

For example, when the first communication unit 140 communicates in an in-band communication method, the control unit 160 may communicate data between the wireless power receiving device 200 and each other through the transmission coil 181. It is possible to transmit and receive a signal containing is.

For example, when the second communication unit 145 communicates in an out-of-band communication method, the controller 160 may communicate with the wireless power receiving device 200 through a separate communication module. It is possible to transmit and receive signals including data between them.

Meanwhile, the controller 160 may perform authentication for the wireless power receiving device 200, for example, and may transmit power to the wireless power receiving device 200 based on the authentication result.

The control unit 160 may receive authentication data from the wireless power receiving device 200 through the first communication unit 140, for example, and may receive authentication data received from the wireless power receiving device 200. Based on the data, the wireless power receiving apparatus 200 may be authenticated.

For example, the controller 160 may determine whether the wireless power receiving device 200 is a device that has passed the Qi authentication of WPC, based on the authentication data received from the wireless power receiving device 200. have.

The controller 160 may check authentication data received from the wireless power receiving apparatus 200 based on, for example, authentication data stored in the memory 120.

In this case, the authentication data received from the wireless power receiving apparatus 200 may be, for example, encrypted data. The controller 160 may decrypt the encrypted authentication data by using the authentication data stored in the memory 120 and may perform authentication for the wireless power receiving device 200.

For example, the controller 160 may decrypt the encrypted authentication data according to a decryption algorithm based on the authentication data stored in the memory 120.

The controller 160 may transmit power to the wireless power receiver 200 through the power transmitter 180 when authentication for the wireless power receiver 200 is successful, for example.

Meanwhile, the controller 160 may transmit authentication data to the wireless power receiving apparatus 200 through, for example, the first communication unit 140. For example, the controller 160 may generate authentication data based on the authentication data stored in the memory 120 and transmit the generated authentication data to the wireless power receiving device 200. .

In this case, the authentication data generated based on the authentication data stored in the memory 120 may be, for example, data indicating that the wireless power transmission device 100 is a device that has passed the Qi authentication of the WPC.

When the AP data of at least one access point 300 is not stored in the memory 120, for example, the controller 160 transmits the AP to the wireless power receiving device 200 A signal requesting data transmission can be transmitted.

The controller 160 may receive AP data from the wireless power receiving apparatus 200 through, for example, the first communication unit 140. For example, the controller 160 may receive the SSID, password, MAC address, etc. of at least one access point 300 from the wireless power receiving device 200 through the first communication unit 140.

In this case, the controller 160 may receive AP data as a plurality of data pieces from the wireless power receiving apparatus 200, for example.

Meanwhile, when the AP data received from the wireless power receiving device 200 is encrypted, the controller 160 may decrypt the AP data received from the wireless power receiving device 200.

For example, the controller 160 may decode AP data received from the wireless power receiving apparatus 200 according to a decoding algorithm based on authentication data stored in the memory 120.

Alternatively, for example, the controller 160 may decrypt the AP data received from the wireless power receiving device 200 according to a decryption algorithm based on an encryption key predefined between the wireless power receiving device 200 and each other. have.

Meanwhile, the controller 160 may encrypt AP data of at least one access point 300, for example.

For example, the controller 160 may encrypt AP data of at least one access point 300 according to an encryption algorithm based on authentication data stored in the memory 120.

In this case, the controller 160 may store, for example, encrypted AP data in the memory 120.

Meanwhile, the controller 160 may receive a signal requesting transmission of AP data from the wireless power receiving apparatus 200 through, for example, the first communication unit 140.

The controller 160, for example, when receiving a signal requesting transmission of AP data from the wireless power receiving device 200, through the first communication unit 140, the AP of at least one access point 300 Data may be transmitted to the wireless power receiving device 200.

For example, when authentication for the wireless power receiving device 200 is successful, the control unit 160 transmits AP data of the at least one access point 300 through the first communication unit 140 to the wireless power receiving device ( 200).

In this case, the controller 160 may divide the encrypted AP data into a plurality of data pieces, for example, and may transmit the plurality of data pieces to the wireless power receiving apparatus 200.

On the other hand, the controller 160 may encrypt the AP data and transmit it to the wireless power receiving device 200, for example, when receiving a signal requesting transmission of AP data from the wireless power receiving device 200, The encrypted AP data stored in the memory 120 may be transmitted to the wireless power receiving device 200.

The control unit 160 may communicate with at least one access point 300 through, for example, the third communication unit 150, and may access any one of the at least one access point 300.

The controller 160 may access any one of the at least one access point 300 based on, for example, the SSID and password of the access point 300 stored in the memory 120.

The controller 160 may access any one of the at least one access point 300 based on, for example, the SSID and password of the access point 300 received from the wireless power receiving device 200.

The controller 160 may check, for example, a communication connection state of the wireless power transmission device 100 to the access point 300.

The controller 160 may store a communication connection state of the wireless power transmission device 100 to the access point 300 in the memory 120, for example.

The controller 160 may update a communication connection state of the wireless power transmission device 100 to the access point 300 stored in the memory 120, for example.

Here, the communication connection state may include, for example, whether or not the access point 300 is currently connected, whether communication with the access point 300 through the third communication unit 150 is possible, and the like.

The controller 160 may transmit a communication connection state of the wireless power transmitter 100 to the access point 300 to the wireless power receiver 200 through the first communication unit 140, for example. .

The controller 160 may receive, for example, a communication connection state of the wireless power receiving device 200 to the access point 300 from the wireless power receiving device 200 through the first communication unit 140. have.

The wireless power transmission apparatus 100 may further include, for example, an input unit (not shown). The input unit may include, for example, an input device (eg, a key, a touch panel, etc.) capable of receiving a user input.

The wireless power transmission apparatus 100 may further include, for example, an output unit (not shown). The output unit may include, for example, a display, a display device such as a light emitting diode (LED), and/or an audio device such as a speaker or a buzzer.

When receiving a signal requesting transmission of AP data from the wireless power receiving apparatus 200, for example, the controller 160 may output a screen indicating whether AP data is transmitted through an output unit.

In this case, the controller 160 may receive a user command for determining whether to transmit AP data through the input unit, for example, and may determine whether to transmit AP data according to the received user command.

Meanwhile, the controller 160 may stop power transmission based on values sensed through the sensing unit 130, for example.

3A and 3B are internal block diagrams of an apparatus for receiving wireless power according to an embodiment of the present invention.

Referring to FIG. 3A, the wireless power receiver 200 includes, for example, a power receiver 210, a memory 220, a first communication unit 230, a second communication unit 240, and a third communication unit 250. And/or a control unit 260.

The power receiver 210 may include, for example, at least one receiving coil 281. The power receiver 210 may wirelessly receive power from the wireless power transmission device 100 through, for example, a receiving coil 281.

The memory 220 may include, for example, volatile and/or nonvolatile memory. The memory 220 may store commands or data related to at least one other component of the apparatus 200 for receiving power wirelessly, for example.

The memory 220 may store various data for the overall operation of the wireless power receiving apparatus 200, such as, for example, a program for processing or controlling the controller 260.

The memory 220 may include, for example, authentication data. Here, the authentication data may be data related to Qi authentication, which is an interface standard provided by WPC (Wireless Power Consortium), but the present invention is not limited thereto, and may include various data for authentication. .

For example, the memory 220 may store authentication data for the apparatus 200 for receiving power wirelessly.

The memory 220 may store, for example, AP data of at least one access point 300. For example, the memory 220 may store an SSID, a password, a MAC address, and the like of the access point 300.

The first and second communication units 230 and 240 may communicate with, for example, the wireless power transmission device 100.

In this case, the first communication unit 240 may have, for example, the same or similar configuration as the first communication unit 140 included in the wireless power transmission apparatus 100. Also, the second communication unit 250 may have the same or similar configuration as the second communication unit 150 included in the wireless power transmission apparatus 100, for example.

For example, the wireless power receiving apparatus 200 may communicate with the wireless power transmitting apparatus 100 through an in-band communication method through the first communication unit 240.

For example, the apparatus 200 for receiving power wirelessly may communicate with the apparatus 100 for transmitting power wirelessly through an out-of-band communication method through the second communication unit 250.

The third communication unit 230 may perform communication with an external device, for example. The third communication unit 230 may include at least one communication module for wireless communication and/or wired communication.

The third communication unit 230 is, for example, a communication module for cellular communication such as LTE, LTE-A (LTE Advance), WiBro (Wireless Broadband), etc. Communication may include a communication module and the like.

The third communication unit 230 may communicate with, for example, the access point 300.

The controller 260 may be connected to each component provided in the wireless power receiving apparatus 200, for example.

The controller 260 may transmit/receive signals to and from each component provided in the wireless power receiving apparatus 200, for example, and control the overall operation of each component.

The control unit 260 may include, for example, one or more of a central processing unit, an application processor, and a communication processor (CP).

The controller 260 may receive, for example, a reception device detection signal output from the wireless power transmission device 100 through the reception coil 281. For example, the control unit 260 may receive a digital ping (DP) signal from the wireless power transmission device 100, demodulate the digital ping (DP) signal to obtain digital data. have.

The control unit 260 may, for example, modulate a digital ping (DP) signal, and use the modulated digital ping (DP) signal as a response signal through the receiving coil 281 through the wireless power transmission device 100 ).

Meanwhile, the controller 260 may perform authentication for the wireless power transmission device 100, for example, and may receive power from the wireless power transmission device 100 based on the authentication result.

The control unit 260 may receive authentication data from the wireless power transmission device 100 through the first communication unit 230, for example, based on the data received from the wireless power transmission device 100 Thus, authentication for the wireless power transmission device 100 may be performed.

For example, the controller 260 may determine whether the wireless power transmission device 100 is a device that has passed the Qi authentication of WPC, based on data received from the wireless power transmission device 100.

The controller 260 may check data received from the wireless power transmission apparatus 100 based on, for example, authentication data stored in the memory 220.

At this time, the data received from the wireless power transmission device 100 may be, for example, encrypted data, and the control unit 260 decrypts the encrypted data using the authentication data stored in the memory 220, Authentication for the power transmission device 100 may be performed.

For example, the controller 260 may decrypt the encrypted data according to a decryption algorithm based on the authentication data stored in the memory 220.

The controller 260 may receive power from the wireless power transmission device 100 through the power receiver 210 when authentication for the wireless power transmission device 100 is successful, for example.

Meanwhile, the controller 260 may transmit authentication data to the wireless power transmission apparatus 100 through, for example, the first communication unit 230. For example, the controller 260 may generate authentication data based on the authentication data stored in the memory 220 and transmit the generated authentication data to the wireless power transmission device 100. .

In this case, the authentication data generated based on the authentication data stored in the memory 220 may be, for example, data indicating that the wireless power receiver 200 is a device that has passed the Qi authentication of the WPC.

When the AP data of at least one access point 300 is not stored in the memory 220, for example, the controller 260 transmits the AP to the wireless power transmission device 100 through the first communication unit 230. A signal requesting data transmission can be transmitted.

The controller 260 may receive AP data from the wireless power transmission device 100 through, for example, the first communication unit 230. For example, the controller 260 may receive the SSID, password, MAC address, etc. of at least one access point 300 from the wireless power transmission device 100 through the first communication unit 230.

In this case, the controller 260 may receive AP data as a plurality of data pieces, for example, from the wireless power transmission device 100.

Meanwhile, when AP data received from the wireless power transmission device 100 is encrypted, the controller 260 may decrypt the AP data received from the wireless power transmission device 100.

For example, the controller 260 may decode AP data received from the wireless power transmission apparatus 100 according to a decoding algorithm based on authentication data stored in the memory 220.

Alternatively, for example, the control unit 260 may decrypt the AP data received from the wireless power transmission device 100 according to a decryption algorithm based on an encryption key predefined between the wireless power transmission device 100 and each other. have.

Meanwhile, the controller 260 may encrypt AP data of at least one access point 300, for example.

For example, the controller 260 may encrypt AP data of at least one access point 300 according to an encryption algorithm based on authentication data stored in the memory 220.

In this case, the controller 260 may store, for example, encrypted AP data in the memory 220.

Meanwhile, the controller 260 may receive a signal requesting transmission of AP data from the wireless power transmission device 100 through the first communication unit 230, for example.

The control unit 260, for example, when receiving a signal requesting transmission of AP data from the wireless power transmission device 100, through the first communication unit 230, the AP of at least one access point 300 Data may be transmitted to the wireless power transmission device 100.

The controller 260 transmits AP data of at least one access point 300 through the first communication unit 230 when authentication for the wireless power transmission device 100 is successful, for example, by the wireless power transmission device ( 100).

In this case, the controller 260 may divide the encrypted AP data into a plurality of data pieces, for example, and may transmit the plurality of data pieces to the wireless power transmission apparatus 100.

On the other hand, the controller 260 may encrypt the AP data and transmit it to the wireless power transmission device 100, for example, when receiving a signal requesting transmission of AP data from the wireless power transmission device 100, The encrypted AP data stored in the memory 220 may be transmitted to the wireless power transmission device 100.

The control unit 260 may communicate with at least one access point 300 through, for example, the third communication unit 250, and may access any one of the at least one access point 300.

The controller 260 may access any one of the at least one access point 300 based on, for example, the SSID and password of the access point 300 stored in the memory 220.

The controller 260 may access any one of the at least one access point 300 based on, for example, the SSID and password of the access point 300 received from the wireless power transmission device 100.

The controller 260 may check, for example, a communication connection state of the wireless power receiving device 200 to the access point 300.

The controller 260 may store a communication connection state of the wireless power receiving device 200 to the access point 300 in the memory 220, for example.

The controller 260 may update a communication connection state of the wireless power receiver 200 to the access point 300 stored in the memory 220, for example.

The control unit 260 may transmit a communication connection state of the wireless power receiver 200 to the access point 300 to the wireless power transmission device 100 through the first communication unit 230, for example. .

The control unit 260 may receive, for example, a communication connection state of the wireless power transmission device 100 to the access point 300 from the wireless power transmission device 100 through the first communication unit 230. have.

The apparatus 200 for receiving power wirelessly may further include, for example, an input unit (not shown). The input unit may include, for example, an input device (eg, a key, a touch panel, etc.) capable of receiving a user input.

The apparatus 200 for receiving power wirelessly may further include, for example, an output unit (not shown). The output unit may include, for example, a display, a display device such as a light emitting diode (LED), and/or an audio device such as a speaker or a buzzer.

When receiving a signal requesting transmission of AP data from the wireless power transmission apparatus 100, for example, the controller 260 may output a screen indicating whether AP data is transmitted through an output unit.

In this case, the control unit 260 may receive a user command for determining whether to transmit AP data through the input unit, for example, and may determine whether to transmit the AP data according to the received user command.

Referring to FIG. 3B, the power receiving unit 210 includes, for example, a receiving coil 281, a rectifying unit 211 for rectifying the power received through the receiving coil 281, and a switching regulator for stabilizing the rectified power ( 212) and/or a switching regulator control unit 213 that controls the switching regulator 212 and outputs operating power to the load.

The receiving coil 281 may generate induced electromotive force by, for example, a magnetic field generated in the transmitting coil 181.

Power by the induced electromotive force may be supplied to the load of the wireless power receiving apparatus 200 through, for example, the rectifier 211 and the switching regulator 212. For example, when the load is a battery, power by induced electromotive force may be used to charge the battery.

In the present invention, it is described that the load supplied with power through the rectifier 211 and the switching regulator 212 is a battery, but the present invention is not limited thereto.

The receiving coil 281 may be formed, for example, in a conductive pattern in the form of a thin film on a printed circuit board (PCB). The receiving coil 281 may be printed on a pad (not shown) in a closed loop shape, for example. The polarity of the receiving coil 281 may be, for example, a shape that is wound so as to have polarity in the same direction.

Meanwhile, the power receiver 280 may further include at least one capacitor (not shown) for forming a resonance circuit, for example. In this case, the capacitor may be connected in series or parallel to the receiving coil 281, for example.

Meanwhile, the power receiving unit 280 may further include, for example, a shielding material (not shown) disposed on one side of the receiving coil 281 to shield a leaking magnetic field. For example, the power receiver 280 may include a shielding material that is the same/similar to the shielding material provided in the wireless power transmission device 100.

The rectifying unit 211 may rectify power received through the receiving coil 281, for example. The rectifier 211 may include at least one diode (not shown).

The switching regulator 212 may supply the power rectified by the rectifier 211 to the battery under the control of the switching regulator controller 213, for example. For example, the switching regulator 212 may output the power rectified by the rectifier 211 to the charging power v supplied to the battery.

The switching regulator control unit 213 may control the charging power source v to be output to the battery by, for example, outputting the regulator control signal Src to the switching regulator 212.

Meanwhile, the switching regulator 212 may perform DC-DC conversion according to, for example, a regulator control signal Src of the switching regulator controller 213 to adjust an output voltage. The switching regulator 212 may output charging power v having a voltage of a predetermined size based on, for example, the regulator control signal Src.

4 is a flowchart illustrating a wireless power transmission method of a wireless power transmission apparatus according to an embodiment of the present invention.

Referring to FIG. 4, wireless power transmission includes a selection phase (S410), a ping phase (S420), an identification and configuration phase (S430), and a handover phase (S440). , A negotiation phase (S450), a calibration phase (S460), a power transfer phase (S470), and a renegotiation phase (S480).

First, in the selection step S410, the wireless power transmission apparatus 100 may determine whether or not an object exists in the charging area, for example.

The wireless power transmission device 100 may output an object detection signal (eg, an analog ping (AP) signal) through the transmission coil 181 to determine whether an object exists in the charging area, for example. And, based on the output of the object detection signal, it is possible to determine whether an object exists in the charging area.

The wireless power transmission apparatus 100 may output an object detection signal at a predetermined period until it is determined that an object exists in the charging area, for example.

In the selection step S410, the wireless power transmission apparatus 100 may determine whether or not a foreign matter (FO) exists in the charging area, for example. The foreign object FO may be a metallic object including coins, keys, and the like.

In the selection step S410, the wireless power transmission apparatus 100 may continuously detect, for example, the placement or removal of an object in the charging area.

Meanwhile, when it is determined that an object exists in the charging area in the selection step S410, the wireless power transmission apparatus 100 may perform the ping step S420.

In the ping step (S420), the wireless power transmission device 100, for example, identifies whether the object located in the charging area is the wireless power reception device 200, and activates the wireless power reception device 200 (awake) ), a receiving device detection signal (for example, a digital ping (DP) signal) may be transmitted.

The wireless power transmission device 100 may receive, for example, a response signal to a reception device detection signal. For example, the wireless power receiver 200 may modulate a digital ping (DP) signal and transmit the modulated digital ping (DP) signal as a response signal to the wireless power transmission device 100 have.

The wireless power transmission device 100 may determine whether an object located in the charging area is the wireless power reception device 200 based on, for example, a response signal to the reception device detection signal. For example, the wireless power transmission apparatus 100 may obtain digital data by demodulating a modulated digital ping (DP) signal received as a response signal, and based on the obtained data, It may be determined whether the object located in the charging area is the wireless power receiving device 200.

On the other hand, in the ping step (S420), if it is determined that the object located in the charging area is the wireless power receiving apparatus 200, the identification and configuration step (S430) may be performed.

Meanwhile, in the ping step (S420), when the wireless power transmission apparatus 100 does not receive a response signal, the wireless power transmission apparatus 100 may branch to the selection step (S410) and perform each operation of the selection step (S410).

In the identification and configuration step (S430), the wireless power transmission device 100, for example, based on the data received from the wireless power receiving device 200, to make the power transmission efficiently, each provided configuration Can be controlled.

In the identification and configuration step S430, the wireless power transmission device 100 may receive identification data from, for example, the wireless power reception device 200. The identification data includes, for example, data on the version of the wireless power transmission protocol, data on the manufacturer of the wireless power reception device 200, a device identifier, data indicating the presence or absence of an extended device identifier, data related to authentication, and the like. Can be included.

In the identification and configuration step S430, the wireless power transmitter 100 may receive power data from the wireless power receiver 200, for example. The power data may include, for example, data on maximum power, data on residual power, data on power class, and the like of the wireless power receiving apparatus 200.

The wireless power transmitter 100 may identify the wireless power receiver 200 and check the power state of the wireless power receiver 200 based on, for example, identification data and power data.

For example, the wireless power transmitter 100 may perform authentication for the wireless power receiver 200 based on authentication data received from the wireless power receiver 200.

On the other hand, in the identification and configuration step (S430), when the wireless power transmission device 100 identifies the wireless power reception device 200 and checks the power state of the wireless power reception device 200, the handover step (S430) ) Can be performed.

Meanwhile, in the identification and configuration step (S430), the wireless power transmission apparatus 100 may branch to the selection step (S410) when the identification data and/or the power data are not received.

In the handover step S440, the wireless power transmitter 100 may determine whether to change a communication method with the wireless power receiver 200, for example.

For example, the wireless power transmission device 100 is a wireless power reception device obtained in the identification and configuration step (S430) in a state in which the wireless power reception device 200 communicates with the in-band communication method. Based on the power data of 200, it may be determined whether to maintain in-band communication or change to an out-of-band communication method.

On the other hand, the wireless power transmission device 100, for example, based on the negotiation field value received in the identification and configuration step (S430) or the handover step (S440), the entry to the negotiation step (S450) You can judge whether this is necessary.

The wireless power transmission apparatus 100 may perform a foreign object detection (FOD) operation in the negotiation step S450 when it is necessary to enter the negotiation step S450.

The wireless power transmission device 100 performs a correction step (S460), for example, based on the presence or absence of a foreign object (FO) in the charging area determined in the selection step (S410) and/or the negotiation step (S450). You can decide whether or not.

Meanwhile, the wireless power transmission apparatus 100 may perform the power transmission step S470 when it is not necessary to enter the negotiation step S450.

The wireless power transmission apparatus 100, for example, if the foreign matter (FO) is not detected in the selection step (S410) and/or the negotiation step (S450), through the correction step (S460), the power transmission step (S470) ) Can be performed.

Or, the wireless power transmission device 100, for example, when a foreign matter (FO) is detected in the selection step (S410) and / or negotiation step (S450), without performing power transmission, the selection step (S410) You can also branch to

In the correction step (S460), the wireless power transmission device 100, for example, based on the difference between the transmission power of the wireless power transmission device 100 and the received power of the wireless power reception device 200, the power loss Can be calculated.

In the power transmission step S470, the wireless power transmission device 100 may transmit power to, for example, the wireless power reception device 200.

For example, the wireless power transmitter 100 may transmit power to the wireless power receiver 200 when authentication for the wireless power receiver 200 is successful.

In the power transmission step (S470), when receiving data related to power control from the wireless power receiving device 200, for example, while transmitting power, the received power control and Based on the related data, it is possible to determine the characteristics of the power.

In the power transmission step (S470), the wireless power transmission device 100, for example, receives unwanted data (unexpected data), or during a preset time, desired data, for example, data related to power control. When not receiving (time out), a violation of a preset power transfer contract (power transfer contract violation), or when charging is completed, it may branch to the selection step (S410).

In addition, in the power transmission step (S470), the wireless power transmission device 100 reconfigures the power transmission negotiation according to, for example, a state change of the wireless power transmission device 100 and/or the wireless power reception device 200. If necessary, a renegotiation step (S480) may be performed. In this case, when the renegotiation is normally completed, the wireless power transmission apparatus 100 may return to the power transmission step S470.

5 is a flowchart illustrating a method of operating a wireless power transmission apparatus according to an embodiment of the present invention.

Referring to FIG. 5, in operation S501, the wireless power transmitter 100 may receive authentication data from the wireless power receiver 200. The wireless power transmission device 100 may receive authentication data from the wireless power reception device 200 through the transmission coil 181.

The apparatus 100 for transmitting power wirelessly may perform authentication for the apparatus 200 for receiving power wirelessly based on the authentication data received from the apparatus 200 for receiving power wirelessly in operation S502.

For example, the wireless power transmitter 100 may check authentication data received from the wireless power receiver 200 based on the authentication data stored in the memory 120.

In this case, the authentication data received from the wireless power receiving apparatus 200 may be encrypted data. The wireless power transmission device 100 may decrypt the encrypted authentication data by using the authentication data stored in the memory 120 and may perform authentication for the wireless power receiving device 200.

The wireless power transmission apparatus 100 may determine whether authentication for the wireless power reception apparatus 200 is successful in operation S503.

For example, when it is determined that the wireless power receiving device 200 is a device that has passed the Qi authentication of the WPC, the wireless power transmitting device 100 determines that the authentication for the wireless power receiving device 200 has been successful. can do.

The wireless power transmission apparatus 100 may transmit power to the wireless power reception apparatus 200 through the transmission coil 181 when authentication for the wireless power reception apparatus 200 is successful in operation S504.

The wireless power transmission apparatus 100 may determine whether AP data of at least one access point 300 is stored in the memory 120 in operation S505.

For example, the wireless power transmission apparatus 100 may determine whether the SSID, password, MAC address, etc. of at least one access point 300 are stored in the memory 120.

When the AP data of at least one access point 300 is not stored in the memory 120 in operation S506, the wireless power transmission device 100 requests the wireless power reception device 200 to transmit AP data. It can transmit a signal.

The wireless power transmission apparatus 100 may transmit a signal requesting transmission of AP data to the wireless power reception apparatus 200 through the transmission coil 181.

The apparatus 100 for transmitting power wirelessly may receive AP data from the apparatus 200 for receiving power wirelessly in operation S507 and may decode the received AP data.

For example, the wireless power transmission device 100 may receive AP data from the wireless power reception device 200 through the transmission coil 181, and according to a decryption algorithm based on the authentication data stored in the memory 120 , AP data received from the wireless power receiving apparatus 200 may be decoded.

The wireless power transmission device 100 may communicate with at least one access point 300 based on AP data received from the wireless power reception device 200 in operation S508, and at least one access point 300 ) Can be accessed.

For example, the wireless power transmission device 100 may access any one of the at least one access point 300 based on the SSID and password of the access point 300 received from the wireless power transmission device 100. have.

Meanwhile, in operation S509, when AP data of at least one access point 300 is stored in the memory 120, the wireless power transmission device 100 transmits the AP data from the wireless power reception device 200. It can be determined whether a request signal is received.

The wireless power transmission device 100 may encrypt AP data of at least one access point 300 when receiving a signal requesting transmission of AP data from the wireless power reception device 200 in operation S510. .

For example, the wireless power transmission apparatus 100 may encrypt AP data of at least one access point 300 according to an encryption algorithm based on authentication data stored in the memory 120.

The wireless power transmission apparatus 100 may transmit the encrypted AP data to the wireless power reception apparatus 200 through the transmission coil 181 in operation S511.

As described above, according to various embodiments of the present invention, the wireless power transmission device 100 may safely transmit and receive power with the authenticated wireless power reception device 200 based on the authentication data.

In addition, the wireless power transmission device 100 performs an operation for power transmission and reception, and can easily transmit and receive AP data for the authenticated wireless power reception device 200 and the access point 300, and the access point ( 300) can be easily accessed.

In addition, the wireless power transmission device 100 can encrypt/decrypt AP data for the access point 300 based on the authentication data, so that AP data can be safely transmitted and received with the authenticated wireless power receiving device 200. have.

In addition, since the wireless power transmission device 100 transmits and receives AP data with the wireless power reception device 200 located adjacently through the transmission coil 181, it is possible to more safely transmit and receive AP data.

6 is a flowchart illustrating a method of operating a wireless power receiving apparatus according to an embodiment of the present invention.

Referring to FIG. 6, the apparatus 200 for receiving power wirelessly may receive authentication data from the apparatus 100 for transmitting power wirelessly in operation S601. The apparatus 200 for receiving power wirelessly may receive data regarding authentication from the apparatus 100 for transmitting power wirelessly through the receiving coil 281.

The apparatus 200 for receiving power wirelessly may perform authentication for the apparatus 100 for transmitting power wirelessly based on data received from the apparatus 100 for transmitting power wirelessly in operation S602.

For example, the apparatus 200 for receiving power wirelessly may check authentication data received from the apparatus 100 for transmitting power wirelessly based on the authentication data stored in the memory 220.

In this case, the authentication data received from the wireless power transmission device 100 may be encrypted data, and the wireless power reception device 200 uses the authentication data stored in the memory 220 to encrypt authentication data. May be decrypted, and authentication for the wireless power transmission device 100 may be performed.

The apparatus 200 for receiving power wirelessly may determine whether authentication for the apparatus 100 for transmitting power wirelessly is successful in operation S603.

For example, when it is determined that the wireless power transmission device 100 is a device that has passed the Qi authentication of the WPC, the wireless power reception device 200 determines that the authentication for the wireless power transmission device 100 is successful. can do.

The wireless power receiving apparatus 200 may receive power from the wireless power transmitting apparatus 100 through the receiving coil 281 when authentication for the wireless power transmitting apparatus 100 is successful in operation S604.

The apparatus 200 for receiving power wirelessly may determine whether AP data of at least one access point 300 is stored in the memory 220 in operation S605.

For example, the apparatus 200 for receiving power wirelessly may determine whether the SSID, password, MAC address, etc. of at least one access point 300 are stored in the memory 220.

In operation S606, when the AP data of the at least one access point 300 is not stored in the memory 220, the wireless power receiving device 200 requests the wireless power transmitting device 100 to transmit the AP data. It can transmit a signal.

The wireless power receiving apparatus 200 may transmit a signal requesting transmission of AP data to the wireless power transmitting apparatus 100 through the receiving coil 281.

The apparatus 200 for receiving power wirelessly may receive AP data from the apparatus 100 for transmitting power wirelessly and may decode the received AP data in operation S607.

For example, the wireless power receiving device 200 may receive AP data from the wireless power transmitting device 100 through the receiving coil 281, and according to a decryption algorithm based on the authentication data stored in the memory 220. , AP data received from the wireless power transmission device 100 may be decoded.

The apparatus 200 for receiving power wirelessly may communicate with at least one access point 300 based on AP data received from the apparatus 100 for transmitting power wirelessly, in operation S608, and at least one access point 300 ) Can be accessed.

For example, the wireless power receiving device 200 may access any one of the at least one access point 300 based on the SSID and password of the access point 300 received from the wireless power transmitting device 100. have.

On the other hand, in operation S609, when the AP data of the at least one access point 300 is stored in the memory 220, the wireless power receiving device 200 transmits the AP data from the wireless power transmitting device 100. It can be determined whether a request signal is received.

The wireless power receiving device 200 may encrypt AP data of at least one access point 300 when receiving a signal requesting transmission of AP data from the wireless power transmitting device 100 in operation S610. .

For example, the apparatus 200 for receiving power wirelessly may encrypt AP data of at least one access point 300 according to an encryption algorithm based on authentication data stored in the memory 220.

The apparatus 200 for receiving power wirelessly may transmit the encrypted AP data to the apparatus 100 for transmitting power wirelessly through the receiving coil 281 in operation S611.

As described above, according to various embodiments of the present invention, the wireless power receiving device 200 may safely transmit and receive power with the authenticated wireless power transmission device 100 based on the authentication data.

In addition, the wireless power receiving device 200 performs an operation for power transmission and reception, and can easily transmit and receive AP data for the authenticated wireless power transmission device 100 and the access point 300, and the access point ( 300) can be easily accessed.

In addition, the wireless power receiving device 200 may encrypt/decrypt AP data for the access point 300 based on the authentication data, so that AP data can be safely transmitted and received with the authenticated wireless power transmission device 100. have.

In addition, since the wireless power receiving device 200 transmits and receives AP data with the wireless power transmitting device 100 located in proximity through the receiving coil 281, it is possible to more safely transmit and receive AP data.

7 and 8 are flowcharts illustrating a method of operating devices included in a wireless power system according to an embodiment of the present invention.

Referring to FIG. 7, the apparatus 200 for receiving power wirelessly may communicate with the access point 300 through AP data of the access point 300, and the apparatus for transmitting power wirelessly in a state connected to the access point 300 A case of performing an operation for transmitting/receiving power with the 100 will be described as an example.

Meanwhile, a case in which AP data of at least one access point 300 is not stored in the memory 120 of the wireless power transmission device 100 will be described as an example.

The wireless power transmission device 100 and the wireless power reception device 200 may transmit and receive data related to authentication in operations S701 and S702.

The wireless power transmission apparatus 100 may perform authentication on the wireless power reception apparatus 200 based on authentication data received from the wireless power reception apparatus 200 in operation S703.

The apparatus 200 for receiving power wirelessly may perform authentication for the apparatus 100 for transmitting power wirelessly based on the authentication data received from the apparatus 100 for transmitting power wirelessly in operation S704.

At this time, the authentication data transmitted and received between the wireless power transmission device 100 and the wireless power reception device 200 may be encrypted data, and each device uses the authentication data stored in the memories 120 and 220. Thus, the encrypted authentication data can be decrypted.

The wireless power transmission device 100 and the wireless power reception device 200 may transmit and receive power in operation S705.

The wireless power transmitter 100 may transmit power to the wireless power receiver 200 through the transmission coil 181 when authentication for the wireless power receiver 200 is successful.

The wireless power receiving apparatus 200 may receive power from the wireless power transmitting apparatus 100 through the receiving coil 281 when authentication for the wireless power transmitting apparatus 100 is successful.

The wireless power transmission device 100 and the wireless power reception device 200 may transmit and receive communication connection status for the access point 300 with each other in operations S706 and S707, and the access point 300 transmitted and received with each other. You can check the communication connection status for.

The wireless power transmission apparatus 100 may transmit a signal requesting transmission of AP data to the wireless power reception apparatus 200 in operation S708.

The wireless power transmission apparatus 100 may transmit a signal requesting transmission of AP data to the wireless power reception apparatus 200 through the transmission coil 181.

The wireless power receiving device 200 may encrypt AP data of at least one access point 300 when receiving a signal requesting transmission of AP data from the wireless power transmitting device 100 in operation S709. .

The apparatus 200 for receiving power wirelessly may encrypt AP data of at least one access point 300 according to an encryption algorithm based on authentication data stored in the memory 220.

The apparatus 200 for receiving power wirelessly may transmit the encrypted AP data to the apparatus 100 for transmitting power wirelessly through the receiving coil 281 in operation S710.

The wireless power transmission apparatus 100 may decode AP data received from the wireless power reception apparatus 200 in operation S711.

The wireless power transmission device 100 may decode AP data received from the wireless power reception device 200 according to a decoding algorithm based on authentication data stored in the memory 120.

The apparatus 100 for transmitting power wirelessly may communicate with the access point 300 and access the access point 300 based on AP data received from the apparatus 200 for receiving power wirelessly in operation S712.

The apparatus 100 for transmitting power wirelessly may store AP data received from the apparatus 200 for receiving power wirelessly in the memory 120 in operation S713.

The wireless power transmission apparatus 100 may access the access point 300 by performing active scanning on the basis of the AP data stored in the memory 120 after that.

Referring to FIG. 8, the apparatus 100 for transmitting power wirelessly may communicate with the access point 300 through AP data of the access point 300, and the apparatus for receiving power wirelessly in a state connected to the access point 300 A case of performing an operation for transmitting/receiving power with the 200 will be described as an example.

Meanwhile, a case in which AP data of at least one access point 300 is not stored in the memory 220 of the wireless power receiving apparatus 200 will be described as an example.

The wireless power transmission device 100 and the wireless power reception device 200 may transmit and receive data related to authentication in operations S801 and S802.

The wireless power transmission apparatus 100 may perform authentication on the wireless power reception apparatus 200 based on authentication data received from the wireless power reception apparatus 200 in operation S803.

The apparatus 200 for receiving power wirelessly may perform authentication for the apparatus 100 for transmitting power wirelessly based on the authentication data received from the apparatus 100 for transmitting power wirelessly in operation S804.

At this time, the authentication data transmitted and received between the wireless power transmission device 100 and the wireless power reception device 200 may be encrypted data, and each device uses the authentication data stored in the memories 120 and 220. Thus, the encrypted authentication data can be decrypted.

The wireless power transmission apparatus 100 and the wireless power reception apparatus 200 may transmit and receive power in operation S805.

The wireless power transmission device 100 may transmit power to the wireless power reception device 200 through the transmission coil 181 when authentication for the wireless power reception device 200 is successful.

The wireless power receiving apparatus 200 may receive power from the wireless power transmitting apparatus 100 through the receiving coil 281 when authentication for the wireless power transmitting apparatus 100 is successful.

The wireless power transmission device 100 and the wireless power reception device 200 may transmit and receive communication connection status for the access point 300 with each other in operations S806 and S807, and the access point 300 transmitted and received with each other. You can check the communication connection status for.

The apparatus 200 for receiving power wirelessly may transmit a signal for requesting transmission of AP data to the apparatus 100 for transmitting power wirelessly in operation S808.

The wireless power receiving apparatus 200 may transmit a signal requesting transmission of AP data to the wireless power transmitting apparatus 100 through the receiving coil 281.

The wireless power transmission device 100 may encrypt AP data of at least one access point 300 when receiving a signal requesting transmission of AP data from the wireless power reception device 200 in operation S809. .

The wireless power transmission apparatus 100 may encrypt AP data of at least one access point 300 according to an encryption algorithm based on authentication data stored in the memory 120.

The apparatus 100 for transmitting power wirelessly may transmit the encrypted AP data to the apparatus 200 for receiving power wirelessly through the transmitting coil 181 in operation S810.

The apparatus 200 for receiving power wirelessly may decode AP data received from the apparatus 100 for transmitting power wirelessly in operation S811.

The apparatus 200 for receiving power wirelessly may decrypt AP data received from the apparatus 100 for transmitting power wirelessly according to a decryption algorithm based on authentication data stored in the memory 220.

The apparatus 200 for receiving power wirelessly may communicate with the access point 300 and access the access point 300 based on AP data received from the apparatus 100 for transmitting power wirelessly in operation S812.

The apparatus 200 for receiving power wirelessly may store AP data received from the apparatus 100 for transmitting power wirelessly in the memory 220 in operation S813.

The apparatus 200 for receiving power wirelessly may access the access point 300 by performing active scanning on the basis of AP data stored in the memory 220 after that.

As described above, according to various embodiments of the present invention, the wireless power transmission device 100 and the wireless power reception device 200 perform authentication for each other based on respective authentication data, thereby safely transmitting and receiving power to each other. can do.

In addition, the wireless power transmission device 100 and the wireless power reception device 200 can perform an operation for power transmission and reception, and can easily transmit and receive AP data for the access point 300, and the access point 300 ) Can be easily accessed.

In addition, the wireless power transmission apparatus 100 and the wireless power reception apparatus 200 may encrypt/decrypt AP data for the access point 300 based on authentication data, so that AP data can be safely transmitted/received.

In addition, since the wireless power transmission device 100 and the wireless power reception device 200 transmit and receive AP data to a device located adjacent to each other for wireless power transmission and reception, the AP data may be more safely transmitted and received.

In addition, the wireless power transmission device 100 and the wireless power reception device 200 can easily connect to the access point 300 and connect to the Internet. Through this, the wireless power transmission device 100 and the wireless power receiving device 200 update the software to solve an operation error, or update the firmware to update the interface standard Qi provided by the Wireless Power Consortium (WPC). In the case of updating to a new version, the necessary data can be obtained faster and more conveniently.

The accompanying drawings are only for making it easier to understand the embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and scope of the present invention It should be understood to include water or substitutes.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

Claims (10)

A power transmission unit having a transmission coil;
A first communication unit communicating with a wireless power receiving device through the transmission coil;
A second communication unit for wireless communication with at least one access point;
A memory for storing authentication data; And
Including a control unit,
The control unit,
Receiving authentication data from the wireless power receiving device through the first communication unit,
Based on the authentication data stored in the memory and the authentication-related data received from the wireless power receiving device, authentication for the wireless power receiving device,
When the authentication is successful, power is transmitted to the wireless power receiving device through the power transmission unit,
When the data for the at least one access point is not stored in the memory, requesting the wireless power receiving apparatus to transmit data for the at least one access point through the first communication unit,
When data for the at least one access point is received from the wireless power receiving apparatus, wireless power transmission device performs wireless communication with the at least one access point through the second communication unit. The method of claim 1,
When the data on the at least one access point received from the wireless power receiving device is encrypted, based on the authentication data stored in the memory, the data on the at least one access point received from the wireless power receiving device is Decrypt,
Based on the decrypted data, wireless power transmission device, characterized in that performing wireless communication with the at least one access point through the second communication unit. The method of claim 2,
When data for the at least one access point is stored in a memory, based on the authentication data stored in the memory, data for the at least one access point is encrypted,
And when the authentication is successful, determining whether to transmit the encrypted data to the wireless power receiving device through the first communication unit. The method of claim 3,
When the authentication is successful and a request to transmit data for the at least one access point is received from the wireless power receiving device, transmitting the encrypted data to the wireless power receiving device through the first communication unit Wireless power transmission device, characterized in that. The method of claim 4,
The control unit,
When performing wireless communication with the at least one access point through the second communication unit, the wireless power transmission device, characterized in that for storing the data on the at least one access point in the memory. A power receiving unit having a receiving coil;
A first communication unit communicating with a wireless power transmission device through the receiving coil;
A second communication unit for wireless communication with at least one access point;
A memory for storing authentication data; And
Including a control unit,
The control unit,
Receiving authentication data from the wireless power transmission device through the first communication unit,
Based on authentication data stored in the memory and the authentication data received from the wireless power transmission device, authentication for the wireless power transmission device is performed,
If the authentication is successful, receiving power from the wireless power transmission device through the power receiver,
When data for the at least one access point is stored in a memory, data for the at least one access point is encrypted,
And when the authentication is successful, determining whether to transmit the encrypted data to the wireless power transmission device through the first communication unit. The method of claim 6,
The control unit,
And encrypting data for the at least one access point based on the authentication data stored in the memory. The method of claim 7,
When the authentication is successful and a transmission request for data for the at least one access point is received from the wireless power transmission device, transmitting the encrypted data to the wireless power transmission device through the first communication unit Wireless power receiving device, characterized in that. The method of claim 8,
The control unit,
When the data for the at least one access point is not stored in the memory, requesting the wireless power transmission device to transmit data for the at least one access point through the first communication unit,
When data for the at least one access point is received from the wireless power transmission device, wireless communication with the at least one access point is performed through the second communication unit,
And storing data on the at least one access point in the memory. The method of claim 9,
When the data on the at least one access point received from the wireless power transmission device is encrypted, based on the authentication data stored in the memory, the data on the at least one access point received from the wireless power transmission device is Decrypt,
Based on the decrypted data, wireless power receiving apparatus characterized in that performing wireless communication with the at least one access point through the second communication unit.

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