KR20170086978A - Wireless power receiver and method of manufacturing the same - Google Patents

Wireless power receiver and method of manufacturing the same Download PDF

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Publication number
KR20170086978A
KR20170086978A KR1020160006686A KR20160006686A KR20170086978A KR 20170086978 A KR20170086978 A KR 20170086978A KR 1020160006686 A KR1020160006686 A KR 1020160006686A KR 20160006686 A KR20160006686 A KR 20160006686A KR 20170086978 A KR20170086978 A KR 20170086978A
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KR
South Korea
Prior art keywords
wireless power
coating film
unit
transmission
receiving
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Application number
KR1020160006686A
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Korean (ko)
Inventor
이동혁
송지연
Original Assignee
엘지이노텍 주식회사
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Priority to KR1020160006686A priority Critical patent/KR20170086978A/en
Publication of KR20170086978A publication Critical patent/KR20170086978A/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14Inductive couplings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/24Organic non-macromolecular coating

Abstract

The manufacturing method according to the present embodiment is characterized in that the wireless power receiving apparatus includes: laminating at least one shielding material, at least one adhesive material and a cover tape; Cutting the laminated laminate; And forming a coating film on the cut surface of the cut laminate, wherein the coating film is formed of at least one of a film or a coating liquid.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless power receiving apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless power transmission technology, and more particularly, to a wireless power reception device capable of performing communication with the outside while receiving power wirelessly, and a method of manufacturing the same.

Generally, various electronic apparatuses are equipped with a battery and are driven by using electric power charged in the battery. At this time, in the electronic device, the battery may be replaced and charged again. Here, in order to charge the battery, the electronic apparatus has a contact terminal for contacting the external charging apparatus. That is, the electronic device is electrically connected to the charging device through the contact terminal. However, as the contact terminal is exposed to the outside in the electronic device, it may be contaminated by foreign substances or short-circuited by moisture. In this case, there is a problem that a contact failure occurs between the contact terminal and the charging device, and the battery is not charged by the electronic device.

In order to solve the above problems, a wireless power charging system has been proposed. The wireless power charging system includes a wireless power transmission device and a wireless power reception device. Here, the electronic device is implemented as a wireless power receiving device. In wireless power charging systems, there are various charging schemes. At this time, in order to receive power from the wireless power transmission apparatus, the wireless power transmission apparatus must be set in advance with a charging scheme preset in the wireless power reception apparatus.

Generally, a wireless power receiving device is created in a wireless device such as a portable terminal, and the thickness of a wireless charging and receiving module (antenna) built in as the device becomes slimmer is also thinned, and accordingly, a metal thin film shielding material is applied. When such a metal thin film shielding material is applied to manufacture a wireless power receiving apparatus, problems may occur due to circuit shortage due to conductive fine particles generated in a manufacturing process.

Therefore, the present embodiment provides a wireless power receiving apparatus for efficiently receiving power. The present embodiment provides a manufacturing method for minimizing a factor that may cause a problem in a circuit and an internal configuration in manufacturing a wireless power receiving apparatus.

And more particularly, to a wireless power receiving apparatus and method for minimizing a problem that may occur during a manufacturing process and operation of a shielding material applied to a wireless power receiving apparatus.

According to another aspect of the present invention, there is provided a method of manufacturing a wireless power receiver, comprising: laminating at least one shielding material, at least one adhesive material and a cover tape; Cutting the laminated laminate; And forming a coating film on the cut surface of the cut laminate, wherein the coating film is formed of at least one of a film or a coating liquid.

In addition, the wireless power receiving apparatus according to the present embodiment includes a shielding member formed by laminating at least one shielding material, at least one adhesive, and a cover tape, and cutting the laminated laminated body to form a coating film on a cut surface of the cut laminated body; And a coil disposed on the shielding member, wherein the coating film of the shielding member is formed of any one of a coating liquid and a film.

The shielding material for shielding the electromagnetic field of the coil of the receiving device according to the present embodiment minimizes the disconnection of the conductive fine particles that can occur in the shielding material manufacturing process, Can be improved. In addition, by simplifying the manufacturing process of the wireless power receiving apparatus, it is possible to minimize the production cost and improve the heating efficiency and the charging efficiency of the wireless power receiving apparatus.

In addition, the shielding material wireless power receiving apparatus according to the embodiment can easily perform the coating process in the shielding material configured to shield the electromagnetic field of the coil of the receiving apparatus, without investing additional production facilities at the time of manufacturing.

Further, in the wireless power receiving apparatus according to the embodiment, in the shielding member configured to shield the electromagnetic field of the coil of the receiving apparatus, it is possible to reduce the loss of the full flow due to the side insulation, reduce the invention of the adjacent metal body, Lt; / RTI >

1 is a magnetic induction type equivalent circuit.
2 is a self-resonant-type equivalent circuit.
Figures 3a and 3b are block diagrams illustrating a wireless power transmission device as one of the subsystems that make up the wireless power transmission system.
4A and 4B are block diagrams showing a wireless power receiving apparatus as one of subsystems constituting a wireless power transmission system.
FIG. 5 is an exploded perspective view of a receiving coil portion of a wireless power receiving apparatus to which a shielding member manufactured according to an embodiment is applied. FIG.
6 is a flowchart of a manufacturing process of a nonconductive shielding material.
7 is an exemplary view showing the manufacturing process described in Fig.
8 is a flow chart of a manufacturing process of a general conductive shielding material.
Fig. 9 is an exemplary view showing a manufacturing process described in Fig. 8; Fig.
10 is a flow chart of the manufacturing process of the conductive shielding material according to the embodiment.
11 is an exemplary view showing a manufacturing process described in Fig.
FIGS. 12 and 13 are cross-sectional views of a shield member manufactured according to an embodiment. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same components are denoted by the same reference symbols as possible in the accompanying drawings. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted.

Embodiments use a variety of frequency bands from low frequency (50 kHz) to high frequency (15 MHz) selectively for wireless power transmission, and it is necessary to support a communication system capable of exchanging data and control signals for system control .

The embodiments can be applied to various industrial fields such as a mobile terminal industry using a battery or an electronic device required, a smart clock industry, a computer and notebook industry, a household appliance industry, an electric car industry, a medical device industry, and a robot industry .

Embodiments may consider a system capable of power transmission to one or more multiple devices using one or more transmit coils that provide the device.

According to the embodiment, it is possible to solve the battery shortage problem in a mobile device such as a smart phone and a notebook. For example, when a wireless charging pad is placed on a table and a smart phone or a notebook is used on the table, the battery is automatically charged and can be used for a long time . In addition, by installing wireless charging pads in public places such as cafes, airports, taxis, offices, restaurants, etc., mobile devices manufacturers can charge various mobile devices regardless of charging terminals. In addition, when wireless power transmission technology is applied to household electrical appliances such as cleaners, electric fans, etc., there is no need to look for power cables and complex wires can be eliminated in the home, which can reduce wiring in buildings and increase the space utilization. In addition, it takes a lot of time to charge the electric car with the current household power, but if the high power is transmitted through the wireless power transmission technology, the charging time can be reduced. If the wireless charging facility is installed at the bottom of the parking lot, It is possible to solve the inconvenience of having to prepare.

The terms and abbreviations used in the examples are as follows.

Wireless Power Transfer System: A system that provides wireless power transmission within a magnetic field region

Wireless power transfer unit (PTU): A device that provides wireless power transmission to power receivers of multiple devices within a magnetic field region and manages the entire system.

Wireless power transfer unit (PRU): A device that is provided with a wireless power transmission from a power transmitter within a magnetic field area.

Charging Area: A region where actual wireless power transmission occurs within the magnetic field region, and may vary depending on the size, required power, and operating frequency of the application product.

Scattering parameter: The S parameter is the ratio of the input port to the output port in terms of the input voltage to the output voltage on the frequency distribution (Transmission S21) or the self reflection value of each input / output port, Reflection (S11, S22) of the reflected output.

Quality factor Q: The value of Q in resonance means the quality of frequency selection. The higher the Q value, the better the resonance characteristics. The Q value is expressed as the ratio of the energy stored in the resonator to the energy lost.

The principles of wireless power transmission include magnetic induction and self-resonance.

The magnetic induction method is a noncontact energy transfer technique in which an electromotive force is generated in the load inductor Ll via a magnetic flux generated when the source inductor Ls and the load inductor L1 are brought close to each other and a current is supplied to one of the source inductors Ls . The self-resonance method combines two resonators to generate self-resonance due to the inherent frequency between two resonators, resonating at the same frequency and utilizing resonance techniques to form an electric field and a magnetic field in the same wavelength range. Transmission technology.

1 is a magnetic induction equivalent circuit.

Referring to FIG. 1, in a magnetic induction equivalent circuit, a transmitter includes a source voltage Vs, a source resistance Rs, a source capacitor Cs for impedance matching, and a magnetic coupling with a receiving unit, And a load coil Rl for an impedance matching and a load coil Ll for magnetic coupling with a transmitting unit. The load coil Rl may be implemented as a source coil Ls for impedance matching, And the degree of magnetic coupling between the source coil Ls and the load coil Ll can be expressed by mutual inductance Msl.

In FIG. 1, the ratio S21 of the input voltage to the output voltage is obtained from the magnetic induction equivalent circuit consisting only of the coil without the source capacitor Cs and the load capacitor Cl for impedance matching, The power transmission condition satisfies Equation (1) below.

Equation 1

Ls / Rs = L1 / R1

The maximum power transmission is possible when the ratio of the inductance of the transmission coil Ls to the source resistance Rs and the ratio of the inductance of the load coil Ll to the load resistance Rl are equal to each other. Since there is no capacitor that can compensate for reactance in a system with only an inductance, the value of the self reflection value S11 of the input / output port can not be zero at the point where the maximum power transfer occurs, and the mutual inductance Msl), the power transmission efficiency may vary greatly. Thus, the source capacitor Cs can be added to the transmission device as the compensation capacitor for impedance matching, and the load capacitor Cl can be added to the reception part. The compensation capacitors Cs and Cl may be connected in series or in parallel to the receiving coil Ls and the load coil Ll, respectively. Further, for the impedance matching, a passive element such as an additional capacitor and an inductor may be added to each of the transmitting apparatus and the receiving apparatus, in addition to the compensation capacitor.

2 is a self-resonant-type equivalent circuit.

2, in a self-resonant circuit equivalent circuit, a transmitting device includes a source coil constituting a closed circuit by a series connection of a source voltage Vs, a source resistor Rs and a source inductor Ls, Side resonant coil constituting a closed circuit by a series connection of the inductor L1 and the transmission-side resonant capacitor C1 and the receiving portion is realized by a series connection of the load resistor R1 and the load inductor L1, Side resonance coil constituting a closed circuit by a series connection of a load coil constituting the input side resonance inductor L2 and a resonance inductor L2 on the reception side and a resonance capacitor C2 on the reception side, The load inductor L1 and the load side resonance inductor L2 are magnetically coupled to each other by a coupling coefficient of K23 and the resonance inductance between the transmission side resonance inductor L1 and the reception side resonance inductor L1 is magnetically coupled with the coupling coefficient of K01, Inductor (L2) is magnetically coupled with the coupling coefficient of K12 . In the equivalent circuit of another embodiment, the source coil and / or the load coil may be omitted and only the transmission-side resonance coil and the reception-side resonance coil may be formed.

When the resonance frequencies of the two resonators are the same, most of the energy of the resonator of the transmitting device is transmitted to the resonator of the receiving part to improve the power transmission efficiency. The efficiency in the self resonance method satisfies Equation 2 below When it does, it gets better.

Equation 2

k / Γ >> 1 (k is the coupling coefficient, Γ attenuation factor)

In order to increase the efficiency in the self-resonant mode, an element for impedance matching can be added, and the impedance matching element can be a passive element such as an inductor and a capacitor.

Based on such a wireless power transmission principle, a wireless power transmission system for transmitting power by a magnetic induction method or a self resonance method will be described.

FIGS. 3A and 3B are block diagrams illustrating a wireless power transmission apparatus as one of the sub-systems constituting the wireless power transmission system.

Referring to FIG. 3A, the wireless power transmission system according to the present embodiment may include a transmitting apparatus 1000 and a receiving apparatus 2000 receiving power wirelessly from the transmitting apparatus 1000. The wireless power transmission apparatus 1000 generates a magnetic field based on the AC signal output from the transmission-side power conversion unit 101 and the transmission-side power conversion unit 101 that convert the AC signal inputted thereto and convert it into an AC signal Controls the power conversion of the transmission side resonance circuit unit 102 and the transmission side power conversion unit 101 that provides power to the wireless power receiving apparatus 2000 in the charging area and controls the power conversion of the output signal of the transmission side power conversion unit 101 The impedance matching of the transmission side resonance circuit unit 102 is performed and the impedance, voltage, and current information are sensed from the transmission side power conversion unit 101 and the transmission side resonance circuit unit 102, And a transmission side control unit 103 capable of wireless communication with the base station 2000. The transmission-side power conversion section 101 may include at least one of a power conversion section for converting an AC signal to DC, a power conversion section for varying a DC level to output a DC, and a power conversion section for converting a DC to an AC . The transmission side resonance circuit unit 102 may include a coil and an impedance matching unit capable of resonating with the coil. The transmission-side control unit 103 may include a sensing unit and a wireless communication unit for sensing impedance, voltage, and current information.

3, the wireless power transmission system may include a transmitter 1000 and a receiver 2000 that receives power wirelessly from the transmitter 1000. The transmitter 1000 may include a transmitter AC / A transmission side DC / AC conversion unit 1200, a transmission side impedance matching unit 1300, a transmission coil unit 1400, and a transmission side communication and control unit 1500.

The transmitting side AC / DC converting unit 1100 is a power converting unit for converting an AC signal to a DC signal, and the transmitting side AC / DC converting unit 1100 is connected to a rectifier 1110 and a transmitting side DC / (Not shown). The rectifier 1110 converts a supplied AC signal into a DC signal. The rectifier 1110 may be a diode rectifier having a relatively high efficiency in high-frequency operation, a synchronous rectifier capable of one-chip operation, And a hybrid rectifier capable of saving space and having a high degree of freedom in dead time. The transmitting side DC / DC converting unit 1120 adjusts the level of the DC signal provided from the rectifier 1110 under the control of the transmitting side communication and control unit 1500. As an example of implementing the DC signal, A buck converter, a boost converter that boosts the level of the input signal, a buck-boost converter or a Cuk converter that can raise or lower the level of the input signal. Also, the transmission side DC / DC converter 1120 includes a switching element that performs a power conversion control function, an inductor and a capacitor that perform a power conversion medium function or an output voltage smoothing function, a voltage gain control function or an electrical isolation function And may function to remove a ripple component or a ripple component (AC component included in the DC signal) included in the input DC signal. The error between the command value of the output signal of the transmitting side DC / DC converting unit 1120 and the actual output value can be adjusted through the feedback method and can be performed by the transmitting side communication and control unit 1500 .

The transmission side DC / AC conversion unit 1200 converts the DC signal output from the transmission side AC / DC conversion unit 1100 into an AC signal under the control of the transmission side communication and control unit 1500 and outputs the converted AC signal frequency A half bridge inverter or a full bridge inverter is an example of implementing this system. The transmission side DC / AC conversion unit 1200 may include an oscillator for generating a frequency of an output signal and a power amplifier for amplifying an output signal.

The configuration of the AC / DC converter 1100 and the transmission side DC / AC converter 1200 may be replaced by an AC power supply, or may be omitted or replaced with another configuration.

The transmission-side impedance matching unit 1300 minimizes the reflected waves at points having different impedances to improve the signal flow. Since the two coils of the transmitting unit 1000 and the receiving unit 2000 are spatially separated and the leakage of the magnetic field is large, the impedance difference between the two connecting ends of the transmitting unit 1000 and the receiving unit 2000 is corrected, . The impedance matching unit 1300 may include an inductor, a capacitor, and a resistor. Under the control of the communication and control unit 1500, the inductance of the inductor, the capacitance of the capacitor, The impedance value can be adjusted. When the wireless power transmission system transmits power in a self-induction manner, the transmission-side impedance matching unit 1300 may have a series resonance structure or a parallel resonance structure, and may have an inductive coupling between the transmission unit 1000 and the reception unit 2000 The energy loss can be minimized by increasing the coefficient. When the wireless power transmission system transmits power in a self-resonant manner, the transmission-side impedance matching unit 1300 may change the separation distance between the transmission unit 1000 and the reception unit 2000, or may change a foreign object (FO) It is possible to perform real-time correction of the impedance matching according to the change of the matching impedance on the energy transmission line due to the change of the characteristics of the coil due to the mutual influence by the device of the capacitor, A matching method, a method using a multi-loop, and the like.

The transmission coil 1400 may be implemented as a plurality of coils or a single coil. When a plurality of transmission coils 1400 are provided, they may be spaced apart from each other or may be overlapped with each other, The overlapping area can be determined in consideration of the deviation of the magnetic flux density. Also, when the transmission coil 1400 is manufactured, it can be manufactured in consideration of the internal resistance and the radiation resistance. If the resistance component is small, the quality factor can be increased and the transmission efficiency can be increased.

The communication and control unit 1500 may include a transmission side control unit 1510 and a transmission side communication unit 1520 as subsystems. The transmission-side controller 1510 may control the output voltage of the transmission-side AC / DC converter 1100 in consideration of the power demand of the receiver 2000, the current charge amount, and the wireless power scheme. The frequency and switching waveforms for driving the transmission side DC / AC conversion unit 1200 may be generated in consideration of the maximum power transmission efficiency to control power to be transmitted. Also, the overall operation of the receiver 2000 can be controlled by using an algorithm, a program, or an application required for the control read from the storage unit (not shown) of the receiver 2000. Meanwhile, the transmission-side controller 1510 may be referred to as a microprocessor, a microcontroller unit, or a microcomputer. The transmission-side communication unit 1520 can perform communication with the reception-side communication unit 2620, and can use a Bluetooth system as an example of a communication system. The transmission side communication unit 1520 and the reception side communication unit 2620 can transmit and receive the charging status information and the charging control command to each other. The charging status information may include the number of the receiving unit 2000, the remaining battery level, the number of times of charging, the amount of usage, the battery capacity, the battery ratio, and the transmission power amount of the transmission unit 1000. Side communication unit 1520 can transmit a charging function control signal for controlling the charging function of the receiving unit 2000 and the charging function control signal controls the receiving unit 2000 to enable or disable the charging function And may be a control signal for disabling the control signal.

As described above, the transmitting-side communication unit 105 can be communicated in an out-of-band format, which is a separate module, but is not limited thereto. The transmitting- The transmitting apparatus 1000 uses the feedback signal transmitted from the receiving apparatus 2000 to the transmitting apparatus 1000 and transmits the frequency of the power signal transmitted from the transmitting apparatus 1000 to the transmitting apparatus 1000 using the frequency shift And may perform communication in an in-band format for transmitting signals to the apparatus 2000. [ For example, the receiving apparatus 2000 may modulate a feedback signal to transmit information such as start of charge, end of charge, battery state, etc. to the wireless power transmission apparatus 1000 through a feedback signal. Side communication unit 105 can be configured separately from the transmission-side control unit 103 and the reception-side communication unit 205 can be included in the control unit 203 of the reception apparatus 2000 or separately .

In addition, the wireless power transmission apparatus 1000 of the wireless power transmission system according to the present embodiment may further include a detection unit 1600.

The detection unit 1600 detects an input signal of the transmission side AC / DC conversion unit 1100, an output signal of the transmission side AC / DC conversion unit 1100, an input signal of the transmission side DC / AC conversion unit 1200, The input signal of the transmission side impedance matching unit 1300, the output signal of the transmission side impedance matching unit 1300, the input signal of the transmission side coil 1400, or the transmission side coil 1400). ≪ / RTI > For example, the signal may include at least one of information on a current, information on a voltage, or information on an impedance. The detected signal is fed back to the communication and control unit 1500 and the communication and control unit 1500 includes a transmitting side AC / DC converting unit 1100, a transmitting side DC / AC converting unit 1200, a transmitting side impedance The matching unit 1300 can be controlled. Also, the communication and control unit 1500 can perform FOD (foreign object detection) based on the detection result of the detection unit 1600. [ And the detected signal may be at least one of a voltage and a current. Meanwhile, the detection unit 1600 may be configured with hardware different from the communication and control unit 1500, or may be implemented with one hardware.

4A and 4B are block diagrams illustrating a wireless power receiving apparatus as one of subsystems constituting a wireless power transmission system.

Referring to FIG. 4A, the wireless power transmission system according to the present embodiment may include a transmitting apparatus 1000 and a receiving apparatus 2000 receiving power wirelessly from the transmitting apparatus 1000. The receiving apparatus 2000 includes a receiving-side resonant circuit section 201 for receiving an AC signal transmitted from the transmitting apparatus 1000, a receiving-side resonant circuit section 201 for receiving the AC power from the receiving- A load 2500 to be charged by receiving a DC signal to be outputted from the side power conversion section 202 and the reception side power conversion section 202 and the current voltage of the reception side resonance circuit section 201, Side power conversion section 202, adjusts the level of the output signal of the reception-side power conversion section 202, or adjusts the level of the output signal of the reception-side power conversion section 202, Side control section 203 that can control the output voltage or current of the input / output terminal 202 or whether the output signal of the reception-side power conversion section 202 is supplied to the load or can communicate with the transmission device 1000, . ≪ / RTI > The receiving-side power converting section 202 may include a power converting section for converting an AC signal to a DC, a power converting section for varying the level of the DC to output a DC, and a power converting section for converting a DC to an AC.

4B, the wireless power transmission system may include a transmitting apparatus 1000 and a receiving apparatus 2000 receiving power wirelessly from the transmitting apparatus 1000, and the transmitting apparatus 2000 may include a receiving apparatus And includes a coil part 2100, a reception side impedance matching part 2200, a reception side AC / DC conversion part 2300, a DC / DC conversion part 2400, a load 2500 and a reception side communication and control part 2600 can do. The receiving-side AC / DC converting section 2300 can function as a rectifying section for rectifying the AC signal into a DC signal.

The receiving side coil part 2100 can receive power through a magnetic induction method or a self resonance method. As described above, at least one of the induction coil and the resonance coil may be included according to the power reception scheme.

In an embodiment, the receiving side coil part 2100 may be provided with a near field communication antenna. The receiving side coil part 2100 may be the same as the transmitting side coil part 1400 and the dimensions of the receiving antenna may be changed according to the electrical characteristics of the receiving part 200. [

The receiving-side impedance matching unit 2200 performs impedance matching between the transmitter 1000 and the receiver 2000.

The receiving-side AC / DC converter 2300 rectifies the AC signal output from the receiving-side coil part 2100 to generate a DC signal. The output side voltage of the receiving side AC / DC converting portion 2300 may be referred to as a rectified voltage Vrect. The receiving side communication and control portion 2600 may detect the output voltage of the receiving side AC / DC converting portion 2300 (Or referred to as a minimum output voltage Vrect_min), which is the minimum value of the output voltage of the receiving-side AC / DC converter 2300, a maximum rectified voltage Vrect_max (Ehsms chleo output voltage (Vrect_max) and a maximum value between a minimum value and a maximum value of the output voltage (Vref_max) 1000).

The receiving-side DC / DC converting section 2400 can adjust the level of the DC signal output from the receiving-side AC / DC converting section 2300 to the capacity of the load 2500.

The load 2500 may include a battery, a display, a voice output circuit, a main processor, and various sensors. The load 2500 may include at least a battery 2510 and a battery management unit 2520 as shown in FIG. 4A. The battery management unit 2520 can sense the charged state of the battery 2510 and adjust the voltage and current applied to the battery 2510.

The receiving side communication and control unit 2600 can be activated by the wake-up power from the transmitting side communication and control unit 1500 and performs communication with the transmitting side communication and control unit 1500, The operation of the subsystem can be controlled.

The receiving apparatus 2000 may include one or a plurality of receiving apparatuses 2000 and may receive energy from the transmitting apparatus 1000 at the same time. That is, in the self-resonant wireless power transmission system, a plurality of target receiving apparatuses 2000 can receive power from one transmitting apparatus 1000. In this case, the transmitter matching unit 1300 of the transmitter 1000 may adaptively perform impedance matching between the plurality of receiving apparatuses 2000. This can be equally applied to a case where a plurality of reception side coil portions independent from each other in the magnetic induction system are provided.

When the receiving unit 2000 includes a plurality of units, the power receiving systems may be the same system or different types of systems. In this case, the transmitting unit 1000 may be a system for transmitting power by a magnetic induction system or a self-resonance system, or a system for mixing both systems.

Meanwhile, in the case of the radio power transmission of the magnetic induction type, the transmission side AC / DC conversion unit 1100 in the transmission unit 1000 converts the AC signal of 60 Hz to 110 V to 220 V And the transmission side DC / AC conversion unit 1200 can receive the DC signal and output the AC signal of 125 KHz. The receiving side AC / DC converting unit 2300 of the receiving unit 2000 receives the 125 KHz AC signal and converts it into a DC signal of 10 V to 20 V, and the receiving side DC / DC converting unit 2400 converts the DC For example, a 5V direct current signal to the load 2500, and transmit the DC signal to the load 2500. In the case of the wireless power transmission of the self-resonance type, the transmitting side AC / DC converting unit 1100 in the transmitting unit 1000 receives the alternating current signal of 60 Hz from 110 V to 220 V and converts it into a DC signal of 10 V to 20 V, And the transmission side DC / AC conversion unit 1200 can receive the DC signal and output an AC signal of 6.78 MHz. The receiving AC / DC converting unit 2300 of the receiving unit 2000 receives the AC signal of 6.78 MHz and converts it into a receiving side DC signal of 10 V to 20 V, and the DC / DC converting unit 2400 A direct current signal of, for example, 5V suitable for the load 2500 can be output to the load 2500.

5 is an exploded perspective view of a receiving coil part of a wireless power receiving apparatus to which a shielding member manufactured according to an embodiment is applied.

5, the receiving coil portion of the wireless power receiving apparatus includes a coil 510, a mounting member 520, an adhesive member 530, and a shielding member 540.

The mounting member 520 supports the coil 510. The mounting member 520 includes a printed circuit board (PCB), a flexible printed circuit board (FPCB), and a film.

The coil 510 supported by the mounting member 520 receives power according to a preset charging scheme. The charging method includes electromagnetic induction, resonance, and propagation. At this time, the coil 510 operates in a predetermined operating frequency band to receive power. For example, if the electromagnetic induction method is set corresponding to the coil 510, the operating frequency band of the coil 510 may correspond to approximately 110 KHz to 205 KHz. Or the resonance mode is set corresponding to the coil 510, the operating frequency band of the coil 510 may correspond to approximately 6.78 KHz.

The adhesive member 530 may be interposed between the mounting member 510 and the shielding member 540. That is, the adhesive member can bond the mounting member 520 and the shielding member 540 to each other at the lower surface of the mounting member 520. [

The shielding member 540 isolates the coil 510 from other components of the wireless power receiving apparatus. At this time, the shielding member 540 may be cut and formed corresponding to the coil part of the wireless power receiving apparatus in the manufacturing process. At this time, the cut surface of the shielding member 540 may be broken and the fine particles may be removed from the cut surface. The power receiving efficiency of the wireless power receiving apparatus can be reduced by the desorbed fine particles.

Therefore, the manufacturing process of the shield member and the shield member according to the process will be described in detail with reference to the following drawings.

6 and 7 are views for explaining a manufacturing process of a nonconductive shielding material applied to a wireless power receiving apparatus. 6 is a flow chart of a manufacturing process of the nonconductive shielding member, and FIG. 7 is an exemplary view showing the manufacturing process illustrated in FIG.

6 and 7, a shielding member applied to a wireless power receiving apparatus may include a non-conductive shield member including a nickel zinc (NiZn) series or a manganese zinc (MnZn) series. The manufacturing process of the nonconductive shielding member may bond the cover tapes 711 and 712 to the upper and lower portions of the nonconductive shielding member 720 as shown in the example of FIG. 7 (a). (S610) At this time, The upper cover tape 711 and the lower cover tape 712 of the shielding member may include polyethylene terephthalate (PET).

When the nonconductive shielding member 720 is joined between the upper cover tape 711 and the lower cover tape 712, a certain area corresponding to the wireless power receiving apparatus to be applied is cut as shown in FIG. 6 (b) C) (S620)

8 and 9 are views for explaining a general manufacturing process of a conductive shielding material applied to a wireless power receiving apparatus. FIG. 8 is a flowchart illustrating a manufacturing process of a general conductive shielding material, and FIG. 9 is an exemplary view illustrating a manufacturing process illustrated in FIG.

Referring to FIGS. 8 and 9, a shield member to be applied to a wireless power receiving apparatus may include a conductive shield member including a nanocrystal and an amorphous type.

9A, the conductive shielding material 910 and the adhesive material 920 may be laminated and laminated into at least one or more layers (S810). In the manufacturing process of the conductive shielding material,

The stacked body 930 in which the conductive shielding material 910 and the adhesive material 920 are joined may cut a certain area so as to be applicable to the wireless power receiving apparatus as illustrated in FIG.

9 (c), the cover tape 940 may be formed by cutting the cover tape 940 on the upper and lower surfaces of the laminate body 930. In operation S830, At this time, the size of the cut region of the cover tape 940 may be larger than the area of the previously cut laminate 930. The cover tape 940 may include polyethylene terephthalate (PET).

When the cut laminated body 930 and the cover tape 940 are prepared, the cover tape 940 may be joined to the upper and lower surfaces of the laminated body 930. (S840) In detail, The cover tape 940 cut on the upper surface and the lower surface of the stacked body 930 cut to a predetermined size as shown in the example of FIG.

A laminate body 930 laminated on the upper and lower surfaces by an upper cover tape 941 and a lower cover tape 942 is laminated on the upper cover tape 941 to seal the conductive fine particles generated from the cut surface of the laminate body 930, The cover tape 940 is cut larger than the cut area of the laminate body 930 so that the laminate body 930 can be bonded to the edge region of the lower cover tape 942. [ The upper cover tape 941 and the lower cover tape 942 may be formed with an outer region EA that is not bonded to the laminate as shown in FIG. 9 (e). Accordingly, the outer area EA may be adhered to seal the laminate 930. [

In the manufacturing process as described above, several steps are required by laminating the shielding material 910 and the adhesive material 920 and sealing the stacked laminate by performing a separate cover tape laminating process.

Therefore, a manufacturing process for minimizing the above process and optimizing the size of the shielding member will be described in detail with reference to FIGS. 10 and 11. FIG.

Fig. 10 is a flow chart of the manufacturing process of the conductive shielding material according to the embodiment, Fig. 11 is an exemplary view showing the manufacturing process described in Fig. 10, and Figs. 12 and 13 are sectional views of the shielding material manufactured according to the embodiment.

Referring to FIGS. 10 to 13, a shielding member applied to a wireless power receiving apparatus may include a conductive shielding member including a nanocrystal and an amorphous type.

The conductive shielding material may be formed by laminating the shielding material 1120 and the adhesive material 1130 in at least one layer as shown in the example of FIG. 11 (a). At this time, the upper cover tape 1111 and the lower cover tape 1112 may be joined to the upper surface of the shielding material 1120a disposed on the uppermost surface and the lower surface of the shield N disposed on the lowermost surface. The conductive shielding member according to the embodiment includes at least one shielding material 1120 and at least one adhesive material 1130 for adhering the shielding material 1120 to the shielding member 1120 and the shielding material 1120 and the adhesive material 1130 The cover tapes 1111 and 1112 are joined to the upper and lower surfaces by a single process. The cover tapes 1111 and 1112 may include polyethylene terephthalate (PET). The adhesive 1130 may also include optical clear adhesives (OCA) or optical clear resins (OCR).

The shielding laminate 1140 laminated with the at least one shielding material 1120 and at least one adhesive material 1130 and the cover tapes 1111 and 1112 is formed in a predetermined shape The region can be cut (C). (S1020) Accordingly, the shielding laminate 1140 may be formed of a shielding member having a size to be applied to a wireless power receiving apparatus as shown in FIG. 11 (c).

At this time, when the cutting (C) of the shielding laminate 1140 is completed, a coating film may be formed by applying a coating agent to the cut surface of the shielding laminate 1140 (S1030)

In detail, the coating layer may be formed on the cut surface 1150 where the shielding layered body 1140 is cut, thereby reducing the conductive fine particles desorbed from the cut surface 1150.

FIG. 12 shows an example of a cutting plane B-B 'in FIG. 11 (c) when the coating film formed on the cut surface 1150 is formed by spraying a liquid type coating agent. In detail, the coating agent for forming the sprayed coating layer may include an acryl based epoxy resin. In addition, the coating may include the same material as the adhesive 1130 included in the shielding laminate 1140.

FIG. 13 shows an example of a cross section taken along line A-A 'in FIG. 11 (c) when the coating film formed on the cut surface 1150 is formed of a film-type coating agent. In detail, the coating film 1170 formed in the film shape is formed on the cut surface 1150 of the shielding laminate 1140 as shown in FIG. 13 (a) so as to correspond to the height h of the shielding laminate 1140, The coating film 1170 can be formed. At this time, the coating film 1170 may be formed of polyethylene terephthalate (PET), which is the same material as the cover tapes 1111 and 1112 laminated on the upper and lower portions of the shielding laminate 1140. The thickness b of the coating film 1170 may be equal to or less than the thicknesses a and a of the cover tapes 1111 and 1112.

13B, the film coating film 1170 is formed by bonding a film corresponding to the height h 'of the shielding laminate 1140 excluding the cover tapes 1111 and 1112 to form a coating film 1170 ) Can be formed. At this time, the coating film 1170 may be formed of polyethylene terephthalate (PET), which is the same material as the cover tapes 1111 and 1112 laminated on the upper and lower portions of the shielding laminate 1140. The thickness b of the coating film 1170 may be equal to or less than the thicknesses a and a of the cover tapes 1111 and 1112.

Claims (14)

Joining at least one shielding material and at least one adhesive material and a cover tape;
Cutting the laminated laminate;
And forming a coating film on a cut surface of the cut laminated body,
The coating film
Film or a coating liquid. ≪ RTI ID = 0.0 > 21. < / RTI >
The method according to claim 1,
And the cover tape is joined to the upper and lower surfaces of the laminated laminate.
The method according to claim 1,
The step of forming the coating film
Wherein the coating liquid is sprayed onto the cut surface when the coating layer is formed of a coating liquid.
The method of claim 3,
Wherein the coating liquid is formed of any one of acrylic-based or epoxy-based materials.
The method of claim 3,
Wherein the coating liquid is formed of the same material as the adhesive liquid applied to the adhesive material.
The method according to claim 1,
The step of forming the coating film
Wherein the coating film is formed by laminating the coating film on the cut surface when the coating film is formed of a coating film.
The method according to claim 6,
Wherein the coating film is formed of the same material as the cover tape.
The method according to claim 6,
Wherein the coating film is formed to correspond to the cut surface.
The method according to claim 6,
Wherein the coating film is formed on the cut surface excluding the area where the cover tape is joined.
The method according to claim 6,
Wherein the thickness of the coating film is smaller than the thickness of the cover tape.
The method according to claim 6,
Wherein the thickness of the coating film is equal to the thickness of the cover tape.
A shielding member formed by laminating at least one shielding material, at least one adhesive and a cover tape, and cutting the laminated laminated body to form a coating film on a cut surface of the cut laminated body;
And a coil disposed on the shielding member,
The coating film of the shielding member
And a coating liquid or a film.
13. The method of claim 12,
The coating liquid
Wherein the material is selected from the group consisting of acryl-based and epoxy-based materials.
13. The wireless power receiver of claim 12, wherein the film is formed of polyethylene terephthalate.
KR1020160006686A 2016-01-19 2016-01-19 Wireless power receiver and method of manufacturing the same KR20170086978A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200116643A (en) * 2019-04-02 2020-10-13 디자인 주식회사 Hair roll for wireless charging and configuration method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200116643A (en) * 2019-04-02 2020-10-13 디자인 주식회사 Hair roll for wireless charging and configuration method thereof

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