KR100928439B1 - Non-contact charging station of wireless power transmision with pt-pcb core having planar spiral core structure - Google Patents

Abstract

PURPOSE: A contactless electric power charging station with PT(Power Transformer)-PCB core of a planar spiral core structure is provided to improve power transmission efficiency by forming a primary core comprised of a plurality of PT-PCB cores. CONSTITUTION: A contactless electric power charging station includes a controller and a station. The controller controls the power transmission and the data transmission and reception. The station is electrically connected to the controller. The contactless electric power receiver is arranged in the station unit. The station has a primary core(31). The primary core generates the inductive magnetic field. The primary core has a PCB base(32), an inductive pattern core, and a lower core(331). The inductive pattern core has a planar spiral core structure. The lower core is arranged on the PCB base and is positioned between a primary upper core(332) and a secondary upper core(333).

Description

CONTACT CHARGING STATION OF WIRELESS POWER TRANSMISION WITH PT-PCB CORE HAVING PLANAR SPIRAL CORE STRUCTURE}

The present invention relates to a contactless power charging station, and more particularly, a power transformer in which a primary side core of a contactless power charging station that transmits a power signal using an induction magnetic field to a portable device has a plain spiral spiral core structure on a PCB base. The present invention relates to a contactless power charging station equipped with a power transmission PC core having a flat spiral core structure, which is simple in shape and is easy to be mounted on a contactless charger, thereby improving applicability.

In general, mobile devices such as mobile phones, PDAs, PMPs, DMB terminals, MP3s, and laptops are used while moving, so they cannot be powered by directly plugging in general home power. will be.

However, the charger for charging the battery of the portable device is a terminal supply method is used to supply power to the battery pack through a power supply line and a power supply terminal to receive electricity from the general power source. However, when the power is supplied by the terminal supply method, when the charger and the battery are coupled or separated from each other, the terminals on both sides have different potentials, and thus a momentary discharge phenomenon occurs in the terminal portion. As a result, foreign materials gradually accumulate on both terminals, which may cause a fire. In addition, the terminal is directly exposed to the air, such as moisture or dust may be naturally discharged, there is a problem that decreases the life and performance of the charger and battery.

In order to solve the problem of the terminal supply method, a contactless charger has been developed. Such a contactless charger according to the prior art is located on top of the primary coil of the contactless charger, the terminal is embedded with the battery to be charged, it is charged by the secondary coil of the battery. That is, induced electromotive force is generated in the secondary coil by the magnetic field generated by the primary coil, thereby charging the induced electricity.

However, these conventional contactless chargers only supply power to the portable terminal, and other uses are limited, thereby limiting practicality.

In addition, if a metal is placed on the magnetic field generated from the primary coil, there is a problem that the contactless charger may be damaged due to a considerable power loss due to the change of the magnetic field. In addition, if an overcurrent flows in the secondary side coil and the battery pack circuit, a heat generation phenomenon may occur and eventually an explosion accident due to the overheating of the battery pack may occur.

Furthermore, in the conventional solid-state charger, since the Litzcore is made by twisting several strands of wires, the size of the entire charger is increased, which increases the size of the charger and also makes it complicated in structure and difficult to manufacture. In addition, it is difficult to form in various forms, there is a limit to use.

The present invention for solving the above problems is provided with a power transmission PC core that the primary side core of the contactless power charging station for transmitting a power signal by using an induction magnetic field to a portable device is a flatman spiral core structure on the PC base Because of the simplicity of the form is easy to install in a contactless charger is intended to improve the applicability.

In addition, since it is not a ritz core but a thin thickness of the power transmission PC core, it is provided not only in a single layer but also in multiple layers, so that the charging operation is always performed even when the portable device is moved to any position so that it can be stably charged.

In particular, since the primary side core is formed by a plurality of thin power transformer BC cores, the power transmission efficiency is made stable through the power transmission control algorithm when the portable device is moved from one core to another core. The purpose is to make this improvement.

A contactless power charging station equipped with a power spiral PC core of a planar spiral core structure according to the present invention for achieving the above object, an induction magnetic field for power charging and data transmission to the contactless power receiving device 50 side. In the contactless power charging station 10, the contactless power charging station 10 is a control unit 11, the electronic circuit for power transmission and data transmission and reception therein, and the control unit 11 ) Is electrically connected to generate an induction magnetic field and is provided with a station part 30 on which the contactless power receiver 50 is placed, and the station part 30 has a primary side for generating an induction magnetic field. The core part 31 is provided, and the primary side core part 31 is provided with an induction pattern core 33 in the PC base 32 so that the PC base 32 is fastened to the station part 30.The inductive pattern core 33 is characterized in that it is provided with a power transmission-PCB core (PT-PCB Core) having a planar spiral core structure (PSCS, Planar Spiral Core Structure) do.

Accordingly, the induction pattern core 33 of the primary side core portion 31 has a circular core structure in the form of a flat circular spiral core, an elliptical core structure in the form of a flat elliptical spiral core, and a triangular core structure in the form of a flat triangular spiral core. Any one of the following: a rectangular core structure in the form of a flat spiral spiral core, a pentagonal core structure in the form of a flat pentagonal spiral core, a hexagonal core structure in the form of a flat hexagonal spiral core, and a polygonal core structure in the form of a flat polygonal spiral core It may be provided in a spiral core structure.

In addition, the primary core part 31 of the station part 30 includes a bottom core 331 above the PC base 32, and a first upper part above the spacer 321 above the bottom core 331. The core 332 and the second upper core 333 may be provided, and the bottom core 331 may be provided between the first upper core 332 and the second upper core 333.

In addition, a power supply unit 13 for supplying power; A resonant converter 14 for supplying the power of the power supply unit 13 to the bottom core 331, the first upper core 332, and the second upper core 333 of the primary side core part 31; A predriver 15 for transmitting an oscillation signal to the resonant converter 14 under control of a control unit 10; A control unit 11 for controlling the resonant converter 14 to be operated; A station memory unit 12 in which data is stored; An ID signal connected to the bottom core 331, the first upper core 332, and the second upper core 333 of the primary side core part 31 to discriminate a signal transmitted from the contactless power receiver 50. Detection unit 19; A first switching unit 211 connected between the resonant converter 14 and the bottom core 331; A second switching unit 212 connected between the resonant converter 14 and the first upper core 332; A third switching unit 213 connected between the resonant converter 14 and the second upper core 333 is included, and the first switching unit 211 is controlled by the control unit 11. ), A state control block 22 for switching the second switching unit 212 and the third switching unit 213 may be provided.

Furthermore, the control method of a contactless power charging station equipped with a power transPCB core of a planar spiral core structure,

A standby step (S01) of requesting a unique ID signal from the primary core unit 31 to the contactless power receiver 50 by the control of the control unit 11;

An ID signal detection step (S02) of transmitting a unique ID signal from the contactless power receiving device (50) in the standby step to perform signal processing on the ID signal detection unit (19);

The signal detected by the ID signal detection unit 19 is transmitted to the control unit 11, and the detected signal is transmitted from any one of the first upper core 332, the second upper core 333, and the lower core 331. A position discriminating step (S03) of determining whether a detected signal is detected;

A switching control signal transmission step (S04) of transmitting a switching signal for switching to a corresponding core side determined by the position discrimination step to a state control block 22 side;

The first control unit 211, the second switch unit 212, the third switch unit 213 in the resonant converter 14 by transmitting a power transmission control signal to the pre-driver 15 side with the switching control signal transmission step The power is applied to the) side, and the contactless power transmission step (S05) for generating an induction magnetic field by receiving power from the corresponding switched on core is characterized in that it is provided.

The present invention provided as described above has a form because the primary side core of the contactless power charging station for transmitting a power signal using an induction magnetic field to the portable device is provided with a power transmission PC core having a plain-manual spiral core structure on the PC base Simple and easy to install in a contactless charger has an excellent effect to improve the applicability.

In addition, since it is not a litz core but a thin thickness of the power transmission PC core, it is provided not only as a single layer but also as a plurality of layers, so that the charging operation is always performed regardless of the location where the portable device is moved to have a stable charging.

In particular, since the primary side core is formed by a plurality of thin power transformer BC cores, the power transmission efficiency is made stable through the power transmission control algorithm when the portable device is moved from one core to another core. There is an excellent effect that allows this to be improved.

Hereinafter, described in detail with reference to the accompanying drawings.

1 is a control configuration diagram for a contactless power charging station according to the present invention, Figure 2 is a schematic sectional view illustrating a schematic layer configuration of the primary side core portion of a contactless power charging station according to the present invention, Figures 3 to Figure 5 is a schematic illustration of the primary side core portion of a contactless power charging station according to the present invention, Figure 3 is a primary side core portion of the contactless power charging station is formed in a rectangular shape, Figure 4 Figure 1 shows that the primary side core portion of the contactless power charging station is formed in a circular shape. In addition, FIG. 5 shows that the primary side core part is formed as a multilayer, and the left side is a plan view, and the right side cross section is shown.

6 and 7 are control flowcharts of a contactless power charging station and a contactless power receiver according to the present invention, which is a flowchart of a power transmission control algorithm.

Figure 8 is a schematic power transmission control configuration for a contactless power charging station according to the present invention, the state control block 22 and the switching unit of the contactless power charging station 10 is shown, Figure 9 is in accordance with the present invention Power transmission control flow diagram for a contactless power charging station.

10 and 11 are efficiency graphs according to power transmission for a contactless power charging station according to the present invention. FIG. 10 is an efficiency graph before a power transmission control algorithm is applied, and FIG. 11 is a power transmission control algorithm applied thereto. In the efficiency graph, the efficiency is the power received at the contactless power receiver 50 receiving power with respect to the input power required for power transmission at the contactless power charging station 10 in which the induction magnetic field for power transmission is generated. It is calculated as the ratio ('efficiency' = 'secondary DC output power' / 'primary DC input power'). 12 is a photograph showing an embodiment of a state where a contactless power receiver is located in a contactless power charging station according to the present invention.

That is, the contactless power charging station 10 equipped with the power transmission PC core of the planar spiral core structure according to the present invention is provided with a battery pack or the like to supply power to the portable device as shown in FIGS. 1 to 12. It is a device for transmitting power to the contactless power receiving device 50 side. In particular, with respect to the induction magnetic field generated by the contactless power charging station 10, the secondary core 51 of the contactless power receiver 50 receives the power signal by the induction magnetic field to be charged with power. .

Looking at the detailed configuration of the contactless power charging station 10 provided as follows. That is, as shown in FIG. 1, the contactless power charging station 10 is electrically connected to the control unit 11 and the control unit 11 for power transmission and data transmission therein so that an induction magnetic field is generated. The station portion 30 is provided with the contactless power receiver 50 is placed on the upper side, the station portion 30 is provided with a primary side core portion 31 for generating an induction magnetic field.

In addition, a power supply unit 13 is provided to supply power to each member of the contactless power charging station 10 and to supply an induction magnetic field in the primary side core part 31.

And a resonant converter 14 for supplying the power of the power supply unit 13 to the bottom core 331, the first upper core 332, and the second upper core 333 of the primary side core part 31. A control unit for controlling the resonant converter 14 to be operated is provided with a predriver 15 for transmitting an oscillation signal to the resonant converter 14 by the control of the control unit 10. It is operated by the control of 11). Data for such processing is stored in the station memory unit 12 in which data is stored.

In addition, an ID signal detection unit 19 is connected to the primary side core unit 31 to process a signal transmitted from the contactless power receiver 50 and transmit the signal to the control unit 11.

And a contactless charging case (not shown) of the contactless power charging station 10 is provided with a power on / off switch, an input panel for signal input forward, the contactless charging plate and the contactless power reception A display unit 101 such as an LCD panel and a state LED for displaying the state of charge in the device 50 may be provided.

Thus, the charging plate of the contactless power transmission device 10 is a portable battery (M) such as a mobile phone, PDA, PMP, DMB terminal, MP3, UMPC or laptop or a battery pack that can be attached to or detached from the portable device. The battery pack can be used as a semi-inner pack), etc.) and the contactless power receiving device 50, which can be provided, and the contactless power receiving device 50 is placed therein contactless power charging station 10 is to detect this and to operate the charging.

The power of the contactless power charging station 10 power supply unit 13 may be supplied with power input from the power of the USB port of the computer C, AC adapter, Cigar Jack, and the like.

In addition, the charging process is provided with a temperature detector 18 for detecting the temperature of the contactless power charging station 10, when the overheating according to the temperature detected by the temperature detector 18 can stop the charging operation, When the contact power charging station 10 is overheated as a whole, the operation of the entire system may be configured to be suspended.

Furthermore, a current sensing member such as a current detector 17 or the like is connected to the power supply unit 13, the predriver 15, the resonant converter 14, or the ID signal detector 19 to monitor the flow of current. The current sensing member may be configured to stop the charging operation or stop the operation of the system when the members are in an overcurrent or overvoltage state, and transmit a signal thereto. Of course, it may be provided to detect a signal transmitted from the contactless power receiver 50 through the current detector 17.

Since the induction magnetic field is generated from the contactless power charging station 10 provided as described above, the induction power is generated due to the induction magnetic field to charge it, and the contactless power receiver 50 for supplying power to the portable device. Looking at the detailed configuration according to an embodiment for the following.

That is, in the contactless power receiver 50 which receives the induction magnetic field generated by the contactless power charging station 10, an induced current is generated in the secondary side core part 51, and the power by the induced current is the battery cell. 53 is charged. The power signal generated as described above is rectified and charged, and the strength of the received power is sensed by the battery pack control unit 54 to transmit a signal for the sensed data to the contactless power charging station 10 side, and the contactless power charging station The induction magnetic field transmitted from 10 is provided to be adjusted. In addition, the charging power is controlled to ensure stable charging, and to stably supply power to portable devices (M) such as mobile phones, PDAs, PMPs, DMB terminals, MP3s, and laptops. In particular, such a contactless power receiving device 50 may be provided separately from the portable devices, such as a semi-battery pack with a battery pack or cover to be mounted on or detachable from the portable devices. It may also be mounted in the case of the portable devices, it may be provided integrally to be directly connected to the power supply of the portable devices (M).

The contactless power receiver 50 for this purpose is provided with a rectifier block 52 (rectifier block) connected to the secondary side core unit 51 to rectify the induction current, and the secondary side core unit 51 The battery pack control unit 54 is configured to process the data transmitted and received by.

In addition, a charging circuit block block 55 (Charger Management Block) is provided to allow the power supplied from the rectifier block 52 to be charged in the battery cell 53 under the control of the battery pack controller 54. Charge monitoring circuit block 56 for monitoring the charge level of the 53 and transmits a full charge or discharge state signal to the battery pack control unit 54 is provided.

Therefore, the battery pack control unit 54 (Power receiver controller) in the rectifier block 52 (Rectification Block), the charging circuit block 55, the charging monitoring circuit block 56 (Protection Control Block), gauge block 57 (Fuel) Gauge Control Block) such as to control the members of the contactless power receiving device 50 is to be provided to generate an ID data signal to the contactless power charging station 10 side and to monitor the state of charge.

A protection circuit module block (PCM) is provided between the charging circuit block block 55 and the battery cell 53 to detect a current charged in the battery cell 53 to detect the battery cell. The charging state information of the 53 is transmitted to the battery pack controller 54 to detect an overvoltage, an undervoltage, an overcurrent, a short circuit, and the like of the battery.

In addition, the contactless power receiving apparatus 50 monitors the power received through the secondary side core unit 51, and determines the degree of voltage of the received power to determine whether it is stably received. The reference voltage of the received power may be variously selected according to options of the contactless power receiver 50, and may be generally set to about 2 to 20V, and in particular, when applied to a general portable device. It can be set to about 5V.

In this way, it is determined whether the voltage of the received power is sensed as a low voltage and whether the voltage of the received power is sensed as a high voltage. For example, when 5V is used as a reference example for the reference voltage, the low voltage detection may be generally determined as a case where -1.5V to -0.5V is sensed to a reduced pressure level than 5V. In addition, the degree of the voltage that is the reference of the high voltage may be determined as the case where the voltage of + 1.5V to + 0.5V is sensed to be increased to about 5V.

When the power signal is received at a voltage lower or higher than the decompressed or elevated reference value, the battery pack controller 54 transmits a contactless signal for the degree of voltage correction together with the unique ID data signal of the contactless power receiver 50. It will be sent to the power charging station 10 side.

The contactless power charging station 10 for generating an induction magnetic field for power transmission to the contactless power receiving device 50 provided as described above is provided with a primary side core part 31 for efficient power transmission. will be.

That is, the primary side core portion 31 is provided with an induction pattern core 33 on the PC base 32, so that the PC base 32 is fastened to the station unit 30.

In addition, the induction pattern core 33 is provided with a power transmission-printed circuit board core (PT-PCB Core) having a planar spiral core structure (PSCS). In other words, the power transformer PC core is formed of a planar spiral core made of the same material in a single layer or a plurality of layers in the PC (CCL, PCL including flexible copper clad laminated).

In particular, the induction pattern core 33 of the primary side core part 31 has a circular core structure in the form of a flat circular spiral core, an oval core structure in the form of a flat oval spiral core, a triangular core in the form of a flat triangular spiral core Structure, a rectangular core structure in the form of a flat rectangular spiral core, a pentagonal core structure in the form of a flat pentagonal spiral core, a hexagonal core structure in the form of a flat hexagonal spiral core, or a polygonal core structure in the form of a flat polygonal spiral core It can be provided with a planar spiral core structure. Thus, as in the prior art, the Ritz core made a core by twisting a plurality of thin wires, which requires a lot of work processes, as well as a large amount of wires. However, since the induction pattern core 33 of the primary side core portion 31 is formed using a planar spiral core structure that is a power transmission PC core as in the present invention, the manufacturing process is performed on the PC base 32. In addition to being simple and easy to manufacture, there is an advantage such that the manufactured primary side core part 31 can be easily installed in the station part 30.

As described above, the induction pattern core 33, which is a power transfiber core core (PT-PCB Core) composed of various types of planar spiral core structures, is formed on the PCB base 32 as shown in FIGS. 3 and 4. It may be made to have a core structure. In addition, as shown in FIG. 5, a plurality of planar core layers are formed such that the induction pattern core 33 is a multilayer structure having the bottom core 331 together with the first upper core 332 and the second upper core 333 on the upper side. It may be provided to have a structure. Therefore, when provided as a charging station for application to a small portable device may have a single layer planar core structure. On the other hand, a large portable device that requires a lot of power will have a planar core layer structure having a plurality of layer structures, so that the power reception rate may be better. As an example, as shown in FIG. 2, a bottom core 331 is provided above the bottom of the base PCB 32, and a spacer 321 is positioned above the bottom core 331. The first upper core 332 and the second upper core 333 are provided above the upper portion 321.

Accordingly, the induction pattern core 33 of the primary side core part 31 is made of a copper material of a spiral shape in a plane.

In addition, the primary side core portion 31 is made of a copper material on the PCB base 32, the induction pattern core 33 is formed in a planar spiral shape, the PS coating layer 34 above the induction pattern core 33 , PSR Coating Layer) may be formed.

When the PAL coating layer 34 is formed as described above, the induction pattern core 33 of the primary core part 31 made of the same copper material is prevented from being damaged, so that the induction magnetic field is generated.

In another embodiment, the induction pattern core 33 is made of a copper material and has a planar spiral shape, and thus the induction pattern core 33 is formed with an electroless gold plating layer 34 (EGPL). Could be.

As such, when the electroless plating layer 34 'is formed, not only the induction pattern core 33 of the primary core part 31 made of copper is damaged, but also the efficiency of the induction magnetic field transmitted to the secondary battery pack side. This is improved, and there is an advantage that the overall power transfer efficiency is good.

Furthermore, the primary side core part 31 may be provided with a shielding part 35 (HPES: Hanrim Postech Electromagnetic shield) below the induction pattern core 33.

In particular, the shielding part 35 (HPES: Hanrim Postech Electromagnetic Shield) may be formed of a shielding panel part 351, a shielding mesh part 352, and a metal thin film part 353.

In this case, the shielding panel unit 351 may include 25 to 55 parts by weight of polyurethane based on 55 to 75 parts by weight of dust.

Such a dust (sendust) is composed of aluminum, silicon, iron, etc., and corresponds to a high permeability alloy. This shielding performance is excellent in composition with Sendust and polyurethane together with a transmission shielding panel. Therefore, if the sendust is 55 parts by weight or less, the shielding performance may be lowered. On the other hand, when 75 parts by weight or more, the performance is not improved compared to the amount administered.

As such, the magnetic field may be effectively shielded by the shielding panel unit 351 including the sender while forming the panel.

In addition, the shielding mesh unit 352 is a member for reducing the eddy current for the induced electromotive force generated by the induction magnetic field. The shielding mesh unit 352 is formed by plating a low eddy current reducing composition on a polyester formed in a mesh shape. It may be provided consisting of 35 to 45 parts by weight of zinc with respect to ~ 65 parts by weight, and may be made of a metal mesh of about 100 mesh to 200 mesh in a metal mesh shape, more preferably 135 mesh. Thus, the eddy current which may be generated in the contactless power charging station 10 may be provided to be extinguished by the shielding mesh unit 352 which is an eddy current reducing member.

Furthermore, the metal thin film portion 353 is formed of an aluminum thin film, and is finally provided at the bottom of the shield 35 (HPES: Hanrim Postech Electro-magnetic shield) to finally block the magnetic field so as not to affect the circuit.

In the contactless power charging station 10 according to the present invention provided as described above, the primary side core portion 31 of the station portion 30 is one or a plurality of bottom cores 331, a plurality or one upper core. It can be provided.

And the upper core and the lower core is provided with some overlap each other on the top view. Thus, for example, when the contactless power receiver 50 is detached from one upper core, communication is possible with the secondary side core 51 of the contactless power receiver 50 in the overlapping bottom core. Since the power signal is continuously received through the bottom core, the upper core, which has been receiving the power signal so far, may be provided to stop power transmission.

The primary side core portion 31 of the contactless power charging station 10 of the present invention, which may be provided as described above, may be provided as a plurality of layers including one bottom core and two upper cores. That is, the bottom core 331 is provided above the PC base 32, and the first upper core 332 and the second upper core 333 are provided above the gap member 321 above the bottom core 331. It can be. The bottom core 331 is provided to be positioned between the first upper core 332 and the second upper core 333 when viewed in plan view.

In addition, the ID signal detection unit 19 connected to the primary side core unit 31 may be formed of the bottom core 331, the first upper core 332, and the second upper core 333 of the primary side core unit 31, respectively. In a connected state, the contactless power receiving device 50 may be provided to always receive a signal.

In addition, a separate switch may be provided to separately transmit power to the bottom core 331, the first upper core 332, and the second upper core 333. The resonant converter 14 and the A first switching unit 211 ('SSR1' in FIG. 8) connected between the bottom core 331; A second switching unit 212 ('SSR2' in FIG. 8) connected between the resonant converter 14 and the first upper core 332; In addition, a third switching unit 213 ('SSR3' in FIG. 8) connected between the resonance converter 14 and the second upper core 333 is included.

In addition, the state control block 22 for switching the first switching unit 211, the second switching unit 212, and the third switching unit 213 under the control of the control unit 11 (Solid). State Relay Controller) is provided.

Thus, the control unit 11 transmits a signal for detecting the contactless power receiver 50 through the bottom core 331, the first upper core 332, the second upper core 333, and the like. The detector 19 (ID checking logic) receives a signal detected from the bottom core 331, the first upper core 332, or the second upper core 333 and transmits the signal to the control unit 11. Accordingly, the control unit 11 (Wireless Power Transfer Controller) side determines whether the signal transmitted or received from the bottom core 331, the first upper core 332 or the second upper core 333 is the most stable. Since the signal transmission and reception to the stable core to transmit the power signal is controlled to operate the switch unit connected to the core.

Thus, the control signal is transmitted to the station control block 22. Of course, the control signal is transmitted so that the power signal is transmitted to the pre-driver (15) and the series full bridge resonant converter (14). Induction magnetic field for power signal transmission is transmitted.

Looking at the control flow chart of the contactless power charging station 10 according to the present invention provided as follows. That is, as shown in FIG. 9, a standby step S01 for requesting a unique ID signal from the primary core unit 31 to the contactless power receiver 50 is performed by the control of the control unit 11. In the standby step S01, the bottom core 331, the first upper core 332, and the second upper core (using the predriver 15, the resonant converter 14, and the state control block 22) are used. In step 333, the detection signal is sequentially transmitted. Accordingly, signals transmitted from the contactless power receiver 50 are sequentially contacted with the respective unique ID signals in the bottom core 331, the first upper core 332, and the second upper core 333. The unique ID signal of the device 50 is received together, and the signal is received through the core and ID signal detector 19 corresponding to the unique ID and transmitted to the control unit 11. The contactless power receiver 50 detects the sensitivity of the signal transmitted from the contactless power charging station 10 (for example, the intensity of the induced current and the strength of the voltage, etc.) in the standby step S01. The signal for sensitivity is transmitted to the power charging station 10 together with the unique ID signal of the corresponding core and the unique ID signal of the contactless power receiver 50.

In this standby mode (S01), the unique ID signal is transmitted and detected from the contactless power receiver 50, the ID signal detection step (S02) for signal processing in the ID signal detection unit 19 is performed. .

The signal detected by the ID signal detection unit 19 is transmitted to the control unit 11, and the detected signal is any one of the first upper core 332, the second upper core 333, and the lower core 331. Position discrimination step S03 is performed to determine whether the signal is detected from the control unit.

A switching control signal transmission step S04 is performed in which a switching signal for switching to the corresponding core side determined by the position determination step S03 is transmitted to the state control block 22 side.

The series of standby steps (S01), ID signal detection step (S02), position discrimination step (S03), and switching control signal transmission step (S04) are carried out, together with the switching control signal transmission step (S04). The power transmission control signal is transmitted to the driver 15 to transmit power to the first switch unit 211, the second switch unit 212, and the third switch unit 213 from the resonant converter 14. The contactless power transmission step (S05) is performed to generate an induction magnetic field by receiving power from the corresponding core.

Accordingly, any one of the first switching unit 211, the second switching unit 212, and the third switching unit 213 switched by the state control block 22 receiving the control signal of the control unit 11 is switched. In addition, the inductive magnetic field is generated by the signal transmitted from the resonance type converter 14 side of the core connected to the switching unit in operation.

Therefore, according to the contactless power charging station 10 according to the present invention provided as described above, by using the electromagnetic induction electromotive force to transmit the power signal wirelessly without a line, regardless of the type of portable devices (Portable Devices) (eg For example, PDA, PMP, MP3P, DMB, etc.) will be charged.

In particular, the planar core structure is formed by stacking two layers on a planar PCB. The contactless power receiver 50 is placed at a position of the station unit 30 of the contactless power charging station 10, so that charging can be performed irrespective of the state. It is provided to be possible, it is provided that the users can be charged without inconvenience.

Of course, the contactless charging station 10 for the purpose of recognizing the contactless power receiving device 50, which is a dedicated battery pack capable of wireless charging, so as to recognize the unique ID signal, and to recognize the charging state to the outside A display unit 101 of a display unit (such as an LED or LCD) for displaying may be provided. In addition, the wireless communication module (Bluetooth, zigbee, wifi, wibro, etc.) that can be synchronized with the wireless data communication function built in the portable device, and other metal foreign matter other than the portable device to be charged can be detected and blocked. It may be provided with a member capable of functions such as foreign matter detection, overload and temperature protection.

In particular, the contactless power charging station 10 may be provided with a resonant converter, a core, and a free driver for generating a magnetic field, and a multi-layer structure for determining the position of the contactless power receiver 50 such as a battery pack. Alternatively, the core may be provided as a multilayer structure. In addition, cores of three planar PCB winding modules may be provided, with two filling cores, one in the top layer and one in the bottom layer, which are separate planar PCB winding modules. The power signal is transmitted only from the core of the individual flat PCB winding module capable of unique ID communication with the contactless power receiving device 50. For this purpose, only the core of the flat PCB winding module is switched to enable the power signal transmission operation. The other core may be provided with a switching module control circuit for preventing operation, and a control unit 11 which is a processor capable of performing a series of control algorithms therefor.

In the contactless power charging station 10 according to the present invention provided as described above, without the core in the form of a litz core using a bond wire according to the prior art, a power transformer PC core in the form of a thin film flat PCB transformer ( PT-PCB Core) is to be provided to have an improved function to facilitate the use and manufacturing while having better characteristics than the existing core.

Particularly, in the case where only one power transformer PCB is provided in the form of a flat thin-film PCB transformer, the size of one core may be approximately 45 to 55 Ф due to deterioration of foreign matter detection and other power transmission efficiency. . Therefore, when the battery pack moves in a wider range than this range, it is difficult to achieve a stable power transmission with a single core. In consideration of this, when the size of a single core is increased to a larger diameter, the magnetic field strength of the central portion of the core where the strength of the magnetic field is concentrated becomes too large, while the strength of the outside is lowered, thus forming a parabolic structure. The voltage transmitted can be unbalanced.

Therefore, in the case of a single core, the station unit 30 is made small so that the contactless power receiver 50 does not move, whereas the size of the contactless power receiver 50 is increased or a large number of contactless points are provided. When the size of the station unit 30 is increased in order to allow the power receiving device 50 to be charged, it may be desirable to provide a plurality of single power transmission PC cores.

In particular, as shown in Figures 2, 5, 8, etc. of the present invention, a plurality of cores are provided in a plurality of layers, so that the cores overlap each other on a plan view, so that even when the contactless power receiver 50 moves in oscillation, power is always present. The transmission is made to be made.

Looking at the size of the individual core that can be provided in this way will be examined as shown in Table 1.

(Comparison of Power Consumption by Size of Primary Core of Solid State Power Charging Station) division Case 1 Case 2 Case 3 Primary Core Size 45Ф 55Ф 65Ф Secondary rectifier stage induced DC voltage at no load  7 V  10 V  14 V Secondary rectifier stage induced DC voltage at load (@ 2.5W)  5 V  6 V  7 V Voltage drop difference (V _drop ) (= a-b) 0.5 (5-4.5) 0.15 (6-4.5) 2.5 (7-4.5) Power Consumption (W) (Load Current) * (Voltage Drop Difference)  0.25 (0.5 * 0.5)  0.75 (0.5 * 0.75)  1.25 (0.5 * 2.5)

In the table 1, the load (@ 2.5W) is measured when the load current is measured at a load current of 500 mA and 5 V, and the voltage drop difference (Vdrop) is measured at the rectifier stage in the contactless power receiver 50 on the secondary side. Is a voltage generated at the rectifying stage through the secondary side core portion 51 of the contactless power receiver 50, and is charged to 4.5V in the battery cell. As described in Table 1, as described above, as the size of the primary side core part 31 of the no-load non-contact power charging station 10 increases, the induced voltage of the rectifying stage increases. In addition, as the primary core becomes larger at load (@ 2.5W), it can be seen that the voltage drop difference increases, resulting in high power consumption.

(Characteristics according to the type of primary side core of solid state power charging station) Item Circular Planar PCB winding Square Planar PCB winding Mobility according to position of secondary load Center: Maintain 5V Outside: Low as 3.5V Center: Keep 4.8V Outer: Keep 4.5V or more Energy efficiency (@ 2.5W load)  60%  59%  Performance evaluation Slightly higher efficiency but limited by position shift The efficiency is similar but the constraints of position movement are small.

In Table 2, the characteristics of the position of the secondary core is changed according to the shape of the primary core, and when provided in a circular form, the power transmission characteristics at the central portion of the core are good, but as shown in FIG. When the secondary core is located, the transmission characteristics are deteriorated. On the other hand, when the primary core is formed in a quadrangular shape, even if the secondary core is moved to the outside as shown in FIG. 3, the power transmission efficiency does not decrease, and thus the constraint period according to the position is small.

In addition, as shown in FIG. 8, the ID signal detection unit 19 of the contactless power charging station 10 applies a filtering technique to recognize a data signal having a unique ID value transmitted from the contactless power receiver 50. It has a function of extracting the LC resonance signal. In addition, the control unit 11 controls the pulse signal to be transmitted for a predetermined period of time, and transmits a unique ID signal from the contactless power receiver 50 on the secondary side. Then, a signal for controlling the sequence of the four-phase switch of the series resonant converter is generated. The pre-driver 15 serves to switch the resonant converter 14.

Thus, the state control block 22 is an induction magnetic field in one of the cores 31 of the three-side PCB winding core, that is, the power side PC core (PT-PCB Core) having a planar spiral core structure (PT-PCB Core) It is equipped to operate so that switching occurs.

In addition, the induced voltage is rectified by the secondary side core part 51, rectifier block 52, and the like of the contactless power receiver 50 through the rectifier circuit. In addition, the battery pack control unit 54 of the contactless power receiver 50 transmits a unique ID data signal to be transmitted to the primary side, and then performs a charging IC on / off control switch function to enter a charging mode, and at full charge. The battery cell 53 is controlled by receiving a state value from the charger IC and transmitting it to the primary side, controlling the charging circuit block 55 for charging the battery cell, and controlling the charging monitoring circuit block 56. It is provided to receive the detection data that the overvoltage, overcurrent, low residual pressure, and the like.

In the contactless power charging station 10 according to the present invention provided as described above, looking at the case where the primary side core portion 31 has a rectangular shape and is provided in a plurality of layers. That is, in the case where the first upper core 332 and the second upper core 333 are provided as the upper portion and the lower core 331 is provided below, the upper upper core 332 and the second upper core 333 may be provided as shown in FIGS. 2, 5 and 8. .

Therefore, even if the secondary side core portion 51 (a rectangular area denoted as 'Load # 1' in FIG. 5) is located at any position of the primary side core portion 31, the power transmission PC cores, which are three flat PCB winding cores ( The first upper core 332, the second upper core 333, and the lower core 331, which are PT-PCB Cores, are positioned in an area of the core.

Therefore, even if the secondary core 51 is located at any position of the primary core 31, the position of the primary core 31 is determined so that only the core is charged. For example, referring to FIG. 5, when the region designated as 'Load # 1' is positioned as the secondary side core in the first upper core 332 (Planar PCB winding # 1), only the first upper core 332 is excited ( excitation) and the remaining second upper core 333 (Planar PCB winding # 3) and the bottom core 331 (Planar PCB winding # 2) are operated to be off. As shown in FIG. 5, when the secondary side core part 51 (Load # 1) in the first upper core 332 is moved to the second upper core 333 side, the first upper core 332 (Planar PCB). The operation of the winding # 1 is turned off, while the second upper core 333 (Planar PCB winding # 3) is excited to provide a continuous charging operation.

In the contactless power receiver 50 during the charging operation as described above, when the voltage measured at the rectifying stage is equal to or less than the reference value (for example, 4.5V or less), power compensation is performed to the contactless power charging station 10 side as shown in FIG. 7. Data transfer will be performed. Accordingly, the contactless power charging station 10 receives a signal for compensation of power transmission transmitted from the contactless power receiver 50, and compensates in a state where the power transmission power is adjusted as shown in FIG. To transmit the power signal.

Of course, as shown in FIGS. 6 and 7, the induced voltage in the contactless power receiver 50 on the secondary side may be provided to be stably charged by 4.5 to 5.5 V by the power transmission and reception control algorithm.

Thus, when the power transmission and reception control algorithm is not applied, the power transmission efficiency is lowered as shown in FIG. 10, but when the power transmission and reception control algorithm is applied, a constant power transmission efficiency appears as shown in FIG. 11. In 50, the power signal is stably received. Therefore, in the secondary battery pack, there is less need to adjust the voltage according to the amount of power received, so that no unnecessary additional members such as a DC-to-DC converter are required, thereby making the battery pack smaller in size. There is an advantage.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art without departing from the spirit and scope of the invention described in the claims below In the present invention can be carried out by various modifications or variations.

1 is a control diagram for a contactless power charging station according to the present invention.

Figure 2 is a schematic cross-sectional view of the primary side core portion of a contactless power charging station according to the present invention.

3 to 5 is a schematic illustration of the primary side core portion of a contactless power charging station according to the present invention.

6 and 7 is a control flowchart of a contactless power charging station and a contactless power receiver according to the present invention.

Figure 8 is a schematic power transmission control configuration for a contactless power charging station according to the present invention.

Figure 9 is a power transmission control flow diagram for a contactless power charging station according to the present invention.

10 and 11 are graphs of the efficiency of the power transmission for the contactless power charging station according to the present invention.

12 is a photograph showing an embodiment of a state where a contactless power receiver is located in a contactless power charging station according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: contactless power charging station 11: control unit

11: control unit 12: station memory unit

13 power supply 14 resonant converter

15: free driver 19: ID signal detection unit

211: first switching part 212: second switching part

213: third switching unit 22: state control block

30 station portion 31 primary side core portion

32: PC base 33: induction pattern core

50: contactless power receiver

51: secondary side core portion 52: rectifier block

53: battery cell 54: battery pack control unit

55: charging circuit block 56: charging monitoring circuit

321: space member 331: bottom core

332: first upper core 333: second upper core

511: PC base 512: pattern core

513: shielding panel portion 514: shielding mesh portion

515: metal thin film

Claims (5)

The control unit 11 for power transmission and data transmission and transmission therein, and the station unit 30 is electrically connected to the control unit 11 so that an induction magnetic field is generated and the contactless power receiver 50 is placed thereon. ) Is provided, the station portion 30 is provided with a primary side core portion 31 to generate an induction magnetic field, and the primary side core portion 31 is an induction pattern core 33 on the PC base 32. Is provided, the PC base 32 is provided to be fastened to the station portion 30, the induction pattern core 33 is a power transformer PC core having a planar spiral core structure (PSCS) In the contactless power charging station 10 provided with (PT-PCB Core, Power Transmission-Printed Circuit Board Core), the induction magnetic field for power charging and data transmission to the contactless power receiving device 50 side, The primary core part 31 of the station part 30 is provided with a bottom core 331 above the PC base 32, and a first upper core above the spacer 321 above the bottom core 331. 332 and the second upper core 333 are provided, The bottom core 331 is provided to be located between the first upper core 332 and the second upper core 333, The control unit 11 determines which of the bottom core 331, the first upper core 332, and the second upper core 333 is a signal transmitted from the contactless power receiver 50. And a power transmission PC core having a planar spiral core structure for controlling the power signal to be transmitted through the corresponding core in response to the determination result. The method of claim 1, The induction pattern core 33 of the primary side core part 31 has a circular core structure in the form of a flat circular spiral core, an elliptical core structure in the form of a flat elliptical spiral core, a triangular core structure in the form of a flat triangular spiral core, Helix core structure in the form of a flat rectangular spiral core, Hexagonal core structure in the form of a flat pentagonal spiral core, Hexagon core structure in the form of a flat hexagonal spiral core A contactless power charging station equipped with a power transmission PC core of a planar spiral core structure, characterized in that provided in the core structure. delete The method according to claim 1 or 2, A power supply unit 13 for supplying power; A resonant converter 14 for supplying the power of the power supply unit 13 to the bottom core 331, the first upper core 332, and the second upper core 333 of the primary side core part 31; A predriver 15 for transmitting an oscillation signal to the resonant converter 14 under control of a control unit 10; A control unit 11 for controlling the resonant converter 14 to be operated; A station memory unit 12 in which data is stored; An ID signal connected to the bottom core 331, the first upper core 332, and the second upper core 333 of the primary side core part 31 to discriminate a signal transmitted from the contactless power receiver 50. Detection unit 19; A first switching unit 211 connected between the resonant converter 14 and the bottom core 331; A second switching unit 212 connected between the resonant converter 14 and the first upper core 332; A third switching unit 213 connected between the resonant converter 14 and the second upper core 333 is included. A state control block 22 for switching the first switching unit 211, the second switching unit 212, and the third switching unit 213 under the control of the control unit 11 is provided. A contactless power charging station equipped with a power transformer PC core having a planar spiral core structure. A standby step (S01) of requesting a unique ID signal from the primary core unit 31 to the contactless power receiver 50 by the control of the control unit 11; An ID signal detection step (S02) of transmitting a unique ID signal from the contactless power receiving device (50) in the standby step to perform signal processing on the ID signal detection unit (19); The signal detected by the ID signal detection unit 19 is transmitted to the control unit 11, and the detected signal is provided with a bottom core 331 above the PC base 32, and is located above the bottom core 331. A first upper core 332 and a second upper core 333 are provided above the spacer 321, and the bottom core 331 is the first upper core 332 and the second upper core 333. Position determination step (S03) for determining whether the signal detected from the first upper core 332, the second upper core 333, the bottom core 331 of the primary side core portion 31 provided to be located therebetween (S03) ); A switching control signal transmission step (S04) of transmitting a switching signal for switching to a corresponding core side determined by the position discrimination step to a state control block 22 side; The first control unit 211, the second switch unit 212, the third switch unit 213 in the resonant converter 14 by transmitting a power transmission control signal to the pre-driver 15 side with the switching control signal transmission step The power transmission PC core of the planar spiral core structure, characterized in that the power is applied to the side, the contactless power transmission step (S05) is provided to receive an electric power from the corresponding core is switched on to generate an induction magnetic field Control method of a contactless power charging station equipped with.

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