KR20180110799A - A wireless power transmitter and wireless power transmission control method - Google Patents

Abstract

The present invention relates to a wireless power transmitter and a wireless power transmission control method. A wireless power transceiver according to an embodiment of the present invention includes: a wireless power antenna assembly including a plurality of wireless power antennas; a temperature sensor for sensing a first temperature of a predetermined region of a region in which the wireless power antenna assembly is disposed; and a control unit for interrupting transmission and reception of a wireless power signal by the wireless power antenna assembly if the first temperature is equal to or higher than a threshold temperature. The predetermined region is a region with a temperature of a representative value of the temperature of the predetermined region in each of the plurality of wireless power antennas. Accordingly, the present invention can reduce the number of temperature sensors and terminals which are required.

Description

[0001] The present invention relates to a wireless power transmitter and a wireless power transmission method,

The present invention relates to a wireless power transmitter, and more particularly, to a control method that considers the temperature of a wireless power transmitter.

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

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

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

Such a wireless charging system may transmit power by at least one wireless power transmission scheme (e.g., electromagnetic induction scheme, electromagnetic resonance scheme, RF wireless power transmission scheme, etc.).

For example, the wireless power transmission scheme may use various wireless power transmission standards based on an electromagnetic induction scheme in which a magnetic field is generated in a power transmission terminal coil and charged using an electromagnetic induction principle in which electricity is induced in a reception terminal coil due to the magnetic field . Here, the electromagnetic induction type wireless power transmission standard may include an electromagnetic induction wireless charging technique defined in a Wireless Power Consortium (WPC) or a Power Matters Alliance (PMA).

In another example, the wireless power transmission scheme may employ an electromagnetic resonance scheme in which the magnetic field generated by the transmission coil of the wireless power transmitter is tuned to a specific resonance frequency to transmit power to a nearby wireless power receiver . Here, the electromagnetic resonance method may include a resonance-type wireless charging technique defined in the Alliance for Wireless Power (A4WP) standard mechanism, a wireless charging technology standard mechanism.

In another example, a wireless power transmission scheme may use an RF wireless power transmission scheme that transmits power to a wireless power receiver located at a remote location by applying low-power energy to the RF signal.

On the other hand, internal heat loss may occur due to the wireless power signal generated by the wireless power antenna mounted on the wireless power transmitter and the electric energy applied to the electronic component of the wireless power transmitter. In other words, the electrical energy applied to the wireless power antenna may be converted to thermal energy in the wireless power antenna, thereby increasing the internal temperature of the wireless power transceiver. If the internal temperature of the wireless power transmitter exceeds the proper temperature, the internal circuit of the wireless power transmitter may malfunction due to heat, and furthermore, the internal circuit may be damaged.

In order to prevent such a problem, the wireless power transmitter monitors temperature information measured internally at regular intervals.

The wireless power transmitter may include a plurality of wireless power antennas and a specific method of controlling the wireless power transceiver in accordance with the heat generated at each of the plurality of wireless power antennas is needed.

It is an object of the present invention to provide a method of controlling a wireless power transmitter and a wireless power transmitter.

The present invention provides a method for controlling a wireless power transmitter by monitoring only one temperature sensor without monitoring the temperature for each wireless power antenna in a wireless power transmitter including a plurality of wireless power antennas.

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

According to an aspect of the present invention, there is provided a wireless power transmitter comprising: a wireless power antenna assembly including a plurality of wireless power antennas; A temperature sensor for sensing a first temperature of a predetermined region of the region in which the wireless power antenna assembly is disposed; And a control unit for stopping transmission and reception of a wireless power signal by the wireless power antenna assembly when the first temperature is equal to or higher than a threshold temperature. And the predetermined area may be a region having a temperature of a representative value of a temperature preset in each of the plurality of wireless power antennas.

According to an embodiment, the representative value may be an average value or a median value of the temperature of the predetermined area preset in each of the plurality of wireless power antennas.

According to an embodiment, the representative value and the sum of the deviations of the temperatures of the predetermined region in each of the plurality of wireless power antennas may be the smallest.

According to an embodiment, the wireless power antenna assembly comprises: a central wireless power antenna;

And a first wireless power antenna and a second wireless power antenna disposed symmetrically about the central wireless power antenna.

According to the embodiment, the predetermined area may be set in one area on the area where the center wireless power antenna is disposed.

According to an embodiment, a wireless power antenna mount frame on which the wireless power antenna assembly is mounted; A shield for absorbing or reflecting electromagnetic waves generated from the wireless power antenna assembly; And a terminal board including a temperature terminal for outputting an electric signal generated from the temperature sensor and an input / output terminal for an electric signal generated from each of the plurality of wireless power antennas; As shown in FIG.

Also, a wireless power transmitter in accordance with an embodiment of the present invention includes: a wireless power antenna assembly including a first wireless power antenna, a second wireless power antenna, and a third wireless power antenna; A temperature sensor for sensing a first temperature of a predetermined region on a region where the wireless power antenna assembly is disposed; And a control unit for stopping transmission and reception of a wireless power signal by the wireless power antenna assembly when the first temperature is equal to or higher than a threshold temperature. Wherein the predetermined area comprises a temperature of a first region temperature on the first radio power antenna, a second region temperature on the second radio power antenna, and a representative value of a third region temperature on the third radio power antenna Lt; / RTI >

According to an embodiment, the representative value may be a mean value or an intermediate value of a first region temperature on the first wireless power antenna, a second region temperature on the second wireless power antenna, and a third region temperature on the third wireless power antenna have.

According to an embodiment, the representative value and the sum of the deviation of the first zone temperature on the first wireless power antenna, the second zone temperature on the second wireless power antenna, and the third zone temperature on the third wireless power antenna is the smallest .

According to an embodiment, the second wireless power antenna and the third wireless power antenna may be symmetrically disposed about the first wireless power antenna.

According to an embodiment, the predetermined area may be one area of an area where the first wireless power antenna is disposed.

According to an embodiment, the first wireless power antenna may be arranged to overlap with the second wireless power antenna and the third wireless power antenna.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And can be understood and understood.

The effect of the control method of the wireless power transmitter and the wireless power transmitter according to the embodiment will be described as follows.

First, although an embodiment includes a plurality of wireless power antennas, it is possible to monitor only the temperature in any one of the regions without monitoring each of them, thereby reducing a required temperature sensor and the number of terminals for the same.

Second, one embodiment can reduce the number of temperature sensors and required terminals, enabling miniaturization of the wireless power transmitter, and is more economical than using multiple components.

The effects obtained in the embodiments are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a block diagram illustrating a wireless charging system according to an embodiment of the present invention.
2 is a block diagram illustrating a wireless charging system according to another embodiment of the present invention.
FIGS. 3A through 3C are diagrams for explaining a case where only one wireless power antenna is activated in a wireless power transmitter including a plurality of wireless power antennas according to an embodiment of the present invention.
FIG. 4 is a view for explaining a temperature table measured in each of the plurality of wireless power antennas in FIGS. 3A to 3C. FIG.
5 is a view for explaining a wireless power transmitter including a temperature sensor positioned in a region representing a temperature of a plurality of wireless power antennas according to an embodiment of the present invention.
6 is a view for explaining a plurality of PCB plates included in a wireless power transmitter including a plurality of wireless power antennas according to an embodiment of the present invention.
7 is a view for explaining a terminal board included in a wireless power transmitter including a plurality of wireless power antennas according to an embodiment of the present invention.

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

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. The codes and code segments constituting the computer program may be easily deduced by those skilled in the art. Such a computer program can be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing an embodiment of the present invention. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

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

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

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

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

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

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

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

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

A wireless power receiver according to an exemplary embodiment of the present invention may include at least one wireless power transmission scheme and may simultaneously receive wireless power from two or more wireless power transmitters. Here, the wireless power transmission scheme may include at least one of the electromagnetic induction scheme, the electromagnetic resonance scheme, and the RF wireless power transmission scheme. In particular, the wireless power receiving means for supporting the electromagnetic induction method may include an electromagnetic induction wireless charging technique defined by Wireless Power Consortium (WPC) and Power Matters Alliance (PMA).

Generally, a wireless power transmitter and a wireless power receiver that constitute a wireless power system can exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication. Here, the in-band communication and the BLE communication can be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, and the like. For example, the wireless power receiver can transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching on / off the current induced through the reception coil in a predetermined pattern. The information transmitted by the wireless power receiver may include various status information including received power intensity information. At this time, the wireless power transmitter can calculate the charging efficiency or the power transmission efficiency based on the received power intensity information.

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

Referring to FIG. 1, the wireless charging system includes a wireless power transmitter 10 for wirelessly transmitting power, a wireless power receiver 20 for receiving the transmitted power, and an electronic device 20 Lt; / RTI >

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

As an example, information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other.

In particular, the state information and control information exchanged between the wireless power transceivers may establish an out-of-band communication link between the wireless power transceiver and transmit its static state information over the established out-of-band communication link.

Here, the static state information of the wireless power receiver 20 includes category information, hardware and software version information, maximum rectifier output power information, initial reference parameter information for power control, information on demand voltage or power, Information about a supportable out-of-band communication method, information on a supportable power control algorithm, and preferred rectifier voltage value information initially set in the wireless power receiver.

The wireless power transmitter 10 may transmit the static state information of the wireless power transmitter 10 to the wireless power receiver via the out-of-band communication link when the static state information of the wireless power receiver 20 is received.

Here, the static state information of the wireless power transmitter 10 includes information on transmitter power information, class information, hardware and software version information, information on the maximum number of supportable wireless power receivers, and / And / or information.

Thereafter, the wireless power receiver 20 may monitor its own real-time power receiving and charging status and may transmit dynamic state information to the wireless power transmitter 10 at periodic or specific event occurrence.

Here, the dynamic state information of the wireless power receiver 20 includes information on the rectifier output voltage and current, information on voltage and current applied to the load, information on the internal measured temperature of the wireless power receiver (superheat information) , The charging condition information, the system fault information, and the alarm information for the reference rectifier voltage change information (the rectified voltage minimum value, the rectified voltage maximum value, and the initially set preferred rectifier stage voltage change value). The wireless power transmitter 10 may perform power adjustment by changing the set value included in the existing static state information when receiving the reference parameter change information for the power control.

The wireless power transmitter 10 also sends a predetermined control command over the out-of-band communication link to control the wireless power receiver 20 to initiate charging when sufficient power is available to charge the wireless power receiver 20 .

The wireless power transmitter 10 may then receive dynamic state information from the wireless power receiver 20 to dynamically control the transmit power.

The wireless power receiver may also transmit to the wireless power transmitter data to identify the system error in the dynamic state information and / or data indicating that charging is complete if an internal system error is detected or the charging is completed S617). Here, a system error may include an overcurrent, an overvoltage, an overheated state, and the like.

For example, if a system fault occurs due to overheating, the wireless power receiver 20 may transmit a predetermined message to the wireless power transmitter 10 indicating that an overheating has occurred. At this time, the wireless power receiver may drive a cooling fan or the like to reduce internally generated heat. Conversely, the wireless power transmitter 10 may also monitor the occurrence of overheating of the internal temperature and transmit it to the wireless power receiver 20 and perform an operation to resolve the overheated condition.

The in-band communication and the out-of-band communication may provide bidirectional communication, but the present invention is not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may be provided.

 In one example, the unidirectional communication may be that the wireless power receiver 20 only transmits information to the wireless power transmitter 10, but the wireless power transmitter 10 is not limited to this, Lt; / RTI >

In the half duplex communication mode, bi-directional communication is possible between the wireless power receiver 20 and the wireless power transmitter 10, but information can be transmitted only by any one device at any time.

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

In particular, the wireless power transmitter 10 according to an exemplary embodiment of the present invention may transmit a predetermined packet to the wireless power receiver 20, The wireless power receiver 20 can notify the electronic device 30 if the connected wireless power transmitter 10 is determined to support the fast charge mode. The electronic device 30 may indicate that fast charging is possible through a predetermined display means, which may be, for example, a liquid crystal display.

In addition, the user of the electronic device 30 may select a predetermined fast charge request button displayed on the liquid crystal display means to control the wireless power transmitter 10 to operate in the fast charge mode. In this case, the electronic device 30 may transmit a predetermined fast charge request signal to the wireless power receiver 20 when the quick charge request button is selected by the user. The wireless power receiver 20 can generate a charging mode packet corresponding to the received fast charging request signal and send it to the wireless power transmitter 10 to switch the normal low power charging mode to the fast charging mode.

2 is a block diagram illustrating a wireless charging system according to another embodiment of the present invention.

For example, as shown in 200a, the wireless power receiver 20 may be configured with a plurality of wireless power receiving devices, wherein a plurality of wireless power receiving devices are connected to one wireless power transmitter 10, Charging may also be performed. At this time,

The power transmitter 10 may distribute power to a plurality of wireless power receiving apparatuses in a time division manner, but the present invention is not limited thereto. For example, the wireless power transmitter 10 may be a wireless power transmitting apparatus, Power can be distributed and transmitted to a plurality of wireless power receiving apparatuses using a frequency band.

At this time, the number of wireless power receiving apparatuses connectable to one wireless power transmitting apparatus 10 is set to at least one of the required power amount for each wireless power receiving apparatus, the battery charging state, the power consumption amount of the electronic apparatus, Can be determined adaptively based on

As another example, as shown in FIG. 200B, the wireless power transmitter 10 may be composed of a plurality of wireless power transmission devices. In this case, the wireless power receiver 20 may be coupled to a plurality of wireless power transmission devices at the same time, and may receive power from the connected wireless power transmission devices at the same time to perform charging. At this time, the number of wireless power transmission apparatuses connected to the wireless power receiver 20 may be adaptively calculated based on the required power amount of the wireless power receiver 20, the battery charging status, the power consumption amount of the electronic apparatus, Can be determined.

Recently, the wireless charging system has been used not only in a building such as a home or business space, but also in a vehicle. A wireless charging system mounted inside the vehicle can be used to charge the occupant's portable devices, including the driver.

Meanwhile, a wireless power transmitter mounted on a vehicle may also be equipped with an antenna capable of short-range wireless communication. In one embodiment, the near field wireless communication may be NFC (Near Field Communication) communication, but may include other Bluetooth communication, beacon communication, Zigbee communication, Wi-Fi communication, and the like.

A wireless power transmitter mounted on a vehicle can perform various functions by performing near field wireless communication with a user's portable device. According to an embodiment, a wireless power transmitter mounted on a vehicle performs a financial settlement service (for example, a high-pass service, a gasoline payment service) that occurs during driving of a vehicle through a short-range wireless communication with a portable device . Also, it is possible to use the remote start service of the vehicle through short-range wireless communication with the portable device, and to confirm whether or not the vehicle has a right of access as a driver of the vehicle. In addition, the position information of the vehicle may be transmitted to the portable device via the wireless power transmitter so that the user can confirm the position of the vehicle.

In one embodiment, the wireless power transmitter may transmit a payment request signal via a local wireless communication to a portable device, and the portable device may transmit a response signal thereto. In one embodiment, the portable device may transmit a remote start signal to the wireless power transmitter via a near field wireless communication. In one embodiment, the wireless power transmitter may transmit signals including position information of the vehicle to a portable device. In addition, in one embodiment, the wireless power transmitter may transmit control signals of various operations using short-range wireless communication.

FIGS. 3A through 3C are diagrams for explaining a case where only one wireless power antenna is activated in a wireless power transmitter including a plurality of wireless power antennas according to an embodiment of the present invention.

The wireless power transmitter 10,10a-10c of Figures 3A-3C includes a wireless power antenna assembly 310 including a first wireless power antenna 310, a second wireless power antenna 320 and a third wireless power antenna 330 . ≪ / RTI >

A first temperature sensor 315 may be located in a portion of the first wireless power antenna 310 and a second temperature sensor 325 may be located in a portion of the second wireless power antenna 320, A third temperature sensor 335 may be located in a portion of the third wireless power antenna 330.

At least one of the first wireless power antenna 310, the second wireless power antenna 320 and the third wireless power antenna 330 may be coupled to the wireless power transmitter 20 based on whether the wireless power receiver 20 is located in an area of the wireless power transmitter 10. [ Any one of the wireless power antennas can be activated.

The wireless power transmitter 10 may include a capacitive sensing sensor (not shown) capable of sensing whether the wireless power receiver 20 is located on the wireless power transmitter 10, It is possible to selectively activate the wireless power antenna disposed in the area.

In general, in the case of a wireless power transmitter 10 including a plurality of wireless power antennas, temperature sensors may be correspondingly arranged for each wireless power antenna. The temperature sensors disposed corresponding to each other can measure the measured temperature continuously or periodically, and compare the measured temperature with a predetermined temperature.

The predetermined temperature may be a temperature for determining whether or not the wireless power antenna is activated. For example, if the temperature measured by the first temperature sensor 315 exceeds a predetermined temperature of 70 (° C), the wireless power transmitter 10 may deactivate the first wireless power antenna 310 have. Similarly, the second wireless power antenna 320 and the third wireless power antenna 330 can be monitored by the second temperature sensor 315 and the third temperature sensor 335.

In one embodiment, when the measured temperature of any one of the first to third temperature sensors 315 to 335 exceeds a predetermined temperature (e.g., 70 DEG C), the first wireless power antenna 310 ), The second wireless power antenna 320, and the third wireless power antenna 330 may be deactivated.

FIG. 4 is a view for explaining a temperature table measured in each of the plurality of wireless power antennas in FIGS. 3A to 3C. FIG.

Referring to FIG. 4, when charging is performed by placing a wireless power receiver 20 (see FIGS. 3A-B) over some area of a wireless power transmitter 10 (see FIGS. 3A-B), a first temperature sensor 315, Figs. 3A to 3B) to the third temperature sensor 335 (see Figs. 3A to 3B).

3A to 3B, when only one of the first temperature sensor 315 to the third temperature sensor 335 is activated, the first wireless power antenna 310 (see Figs. 3A to 3B) (For example, when the charging time is one hour and thirty minutes) sufficient to rise to the highest temperature by the heat generated in the wireless power antenna 330 (see Figs. 3A to 3B).

The first temperature sensor 315 to the third temperature sensor 335 may be, in one embodiment, a thermistor. A thermistor is a semiconductor device having a temperature characteristic according to a resistance size. The thermistor is a negative temperature coefficient thermistor (NTC) having a small resistance when the temperature of the thermistor rises, a positive temperature coefficient thermistor (PTC) , And a critical temperature resistor (CIR) whose resistance changes rapidly at a specific temperature. However, the present invention is not limited to the above-described classification, and it is sufficient if the temperature can be measured.

Even if only one of the first wireless power antenna 310 to the third wireless power antenna 330 is activated, the temperatures measured by the first temperature sensor 315 to the third temperature sensor 335 are large There is no difference. In other words, even when only one of the plurality of wireless power antennas is activated, the temperatures of the plurality of wireless power antennas are similar.

Therefore, it is possible to prevent an overheated state inside the wireless power transmitter 10 even if the temperature is monitored only in only one area representing the temperature of the complex wireless power antenna without measuring the temperature corresponding to each of the plurality of wireless power antennas .

In other words, even if a single temperature sensor is used instead of using a plurality of temperature sensors, a function of monitoring an overheated state inside the wireless power transmitter 10 may be performed.

5 is a view for explaining a wireless power transmitter including a temperature sensor positioned in a region representing a temperature of a plurality of wireless power antennas according to an embodiment of the present invention.

5, a wireless power transmitter 500 includes a wireless power antenna assembly 510 that includes a plurality of wireless power antennas, a temperature sensor 520 that senses the temperature of the wireless power antenna assembly 510, And a controller 540 that controls whether the wireless power antenna assembly is inactive from the terminal plate 530 and the terminal plate 530 that receive or transmit the input or output signals of the assembly 510 and the temperature sensor 520. [ 5 are not essential, a wireless power transmitter 500 having more or fewer components may be implemented.

In one embodiment, the wireless power antenna assembly 510 may include a first wireless power antenna 511, a second wireless power antenna 512 and a third wireless power antenna 513, .

In an embodiment, a first wireless power antenna 511 and a third wireless power antenna 513 may be symmetrically disposed about a second wireless power antenna 512.

The temperature sensor 520 may monitor the temperature of the wireless power antenna assembly 510, and the temperature measured may vary depending on the area where the temperature sensor 520 is located. Accordingly, the region where the temperature sensor 520 is located may be an area representative of the temperature of the entire wireless power antenna assembly 510.

The region where the temperature sensor 520 is located may be a region having a temperature of a representative value of the temperature in a predetermined region in each of the plurality of wireless power antennas.

3A to 3C and 4, the first temperature measured by the first temperature sensor 315, the second temperature measured by the second temperature sensor 325, the second temperature measured by the third temperature sensor 325, The second temperature measured at the second temperature sensor 325 among the third temperatures measured at the second temperature sensor 335 may have a representative value.

4, even if only one of the first wireless power antenna 511, the second wireless power antenna 512, and the third wireless power antenna 513 is activated, the amount of change in the second temperature is the smallest. Also, the temperature closest to the average value of the first temperature to the third temperature is the second temperature. For a similar reason, the temperature at which the sum of the deviations of the temperatures from the first temperature to the third temperature is the smallest is the second temperature.

That is, the representative value may be an average value of the temperature of a predetermined area in each of the plurality of wireless power antennas, or may be an intermediate value. Similarly, the representative value may be a deviation of a temperature in a predetermined region (deviation of a first temperature and a second temperature, deviation of a first temperature and a third temperature, deviation of a second temperature and a third temperature, ) May be the smallest value.

When the first wireless power antenna 511 and the third wireless power antenna 513 are symmetrically disposed about the second wireless power antenna 512, the region where the temperature sensor 520 is located is the second wireless power antenna May be one region of the region in which the second transistor 512 is located.

The controller 540 can activate at least one of the wireless power antennas included in the wireless power antenna assembly 510 according to the area where the wireless power receiver (not shown) is located. Conversely, at least one of the at least one wireless power antenna that is activated to generate a wireless power signal may be deactivated.

FIG. 6 is a view for explaining a plurality of PCB plates included in a wireless power transmitter including a plurality of wireless power antennas according to an embodiment of the present invention. FIG. Fig. 2 is a view for explaining a terminal board included in a wireless power transmitter including a power antenna. Fig. Fig. 7 is for explaining the terminal plate 650 of Fig. 6 in more detail, and will be described with reference to Fig.

Referring to FIG. 6, a wireless power transmitter 600 includes a wireless power antenna frame 610 on which a wireless power antenna assembly is mounted, a wireless power antenna assembly 620 including a plurality of wireless power antennas, A shield 630 for absorbing or reflecting electromagnetic waves generated from the antenna assembly 620, a metal substrate 640 covering the shield 630, a temperature terminal for outputting an electric signal generated from the temperature sensor, And a terminal board 650 including input / output terminals for electrical signals generated from the respective antennas. 6 are not essential, a wireless power transmitter 600 having more or fewer components may be implemented.

If there are a plurality of temperature sensors corresponding to the number of wireless power antennas, the mounting frame 610 or the shielding member 630 should be subjected to a plurality of punching operations or a more complex molding operation for a separate area where the temperature sensor can be arranged do. When only one temperature sensor is included in the wireless power transmitter, only one puncturing region of the shielding material 630 may be required, and a simpler template operation may be performed on the mounting frame 610. [

In the case of the shielding member 630, the shielding efficiency may be affected by the perforations generated to provide the area where the temperature sensor can be disposed. Therefore, when the number of perforations is large, a problem may occur in the shielding function. , It is possible to overcome the limit of the lowering of the shielding function when only one temperature sensor is required.

The terminal board 650 may include a plurality of input / output terminals. The terminal board 650 may be a printed circuit board (PCB), and may be a board including electrical wiring for connecting circuit components included in the wireless power transmitter 600. [ The terminal plate 650 can be mechanically fixed through the pins while electrically connecting circuit components. The greater the number of temperature sensors of the terminal board 650, the more the number of terminals corresponding to the temperature sensor may be required.

7, three output terminals (terminal pins) are required when the number of temperature sensors corresponds to the number of wireless power antennas. However, when one temperature sensor is used, the number of terminals is reduced, The terminal board 650 can be miniaturized.

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

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

Claims (12)

A wireless power antenna assembly comprising a plurality of wireless power antennas;
A temperature sensor for sensing a first temperature of a predetermined region of the region in which the wireless power antenna assembly is disposed; And
A control unit for stopping transmission and reception of a wireless power signal by the wireless power antenna assembly when the first temperature is equal to or higher than a threshold temperature;
/ RTI >
Wherein the predetermined area includes:
Which is a region having a temperature of a representative value of a temperature in a predetermined region in each of the plurality of wireless power antennas,
Wireless power transmitter. The method according to claim 1,
The above-
Wherein the plurality of wireless power antennas includes a plurality of wireless power antennas,
Wireless power transmitter. The method according to claim 1,
Wherein the representative value and the sum of the deviations of the temperatures of the predetermined area in each of the plurality of wireless power antennas are the smallest,
Wireless power transmitter. The method according to claim 1,
The wireless power antenna assembly includes:
A central wireless power antenna;
A first wireless power antenna and a second wireless power antenna symmetrically disposed about the central wireless power antenna,
Wireless power transmitter. 5. The method of claim 4,
Wherein the predetermined area includes:
Wherein the center wireless power antenna is set in one area on an area where the center wireless power antenna is disposed,
Wireless power transmitter. The method according to claim 1,
A wireless power antenna mount frame on which the wireless power antenna assembly is mounted;
A shield for absorbing or reflecting electromagnetic waves generated from the wireless power antenna assembly; And
A terminal board including a temperature terminal for outputting an electric signal generated from the temperature sensor and an input / output terminal for an electric signal generated from each of the plurality of wireless power antennas;
≪ / RTI >
Wireless power transmitter. A wireless power antenna assembly including a first wireless power antenna, a second wireless power antenna, and a third wireless power antenna;
A temperature sensor for sensing a first temperature of a predetermined region on a region where the wireless power antenna assembly is disposed; And
A control unit for stopping transmission and reception of a wireless power signal by the wireless power antenna assembly when the first temperature is equal to or higher than a threshold temperature;
/ RTI >
Wherein the predetermined area includes:
A first region temperature on the first radio power antenna, a second region temperature on the second radio power antenna, and a temperature of a representative value of the third region temperature on the third radio power antenna,
Wireless power transmitter. 8. The method of claim 7,
The above-
A first region temperature on the first wireless power antenna, a second region temperature on the second wireless power antenna, and a third region temperature on the third wireless power antenna,
Wireless power transmitter. 8. The method of claim 7,
The sum of the representative value and the deviation of the first region temperature on the first wireless power antenna, the second region temperature on the second wireless power antenna, and the third region temperature on the third wireless power antenna is the smallest,
Wireless power transmitter. 8. The method of claim 7,
Wherein the second wireless power antenna and the third wireless power antenna are symmetrically disposed about the first wireless power antenna,
Wireless power transmitter. 8. The method of claim 7,
Wherein the predetermined area includes:
Wherein the first wireless power antenna is one area of an area where the first wireless power antenna is disposed,
Wireless power transmitter. 8. The method of claim 7,
The first wireless power antenna comprising:
A second wireless power antenna, and a third wireless power antenna,
Wireless power transmitter.

Images