KR100998683B1 - Non-contact power receiving device for multiple wireless charging - Google Patents

Abstract

The present invention relates to a contactless power receiver, and more particularly, to be charged to the battery cell stably with respect to the power signal transmitted from the contactless power transmitter, the voltage value of the power signal transmitted from the contactless power transmitter The present invention relates to a contactless power receiver capable of multi-contact power charging to be compensated according to the change of a power signal to be received.

The present invention for this purpose is the secondary side charging core 32 to induce an induced current; A rectifier block 33 for rectifying the induced current; A filter block 34 for filtering current; A charging circuit block 36 for charging the power; A protection circuit block 37 for transmitting the charging state information of the battery cell 35 to the power reception control unit 39; It is characterized in that the power reception control unit 39 is included.

Contactless power transmitter, contactless power receiver, mobile phone, charging core

Description

Contactless power receiver capable of multi-contact power charging {NON-CONTACT POWER RECEIVING DEVICE FOR MULTIPLE WIRELESS CHARGING}

The present invention relates to a contactless power receiver, and more particularly, to be charged to the battery cell stably with respect to the power signal transmitted from the contactless power transmitter, the voltage value of the power signal transmitted from the contactless power transmitter The present invention relates to a contactless power receiver capable of multi-contact power charging to be compensated according to the change of a power signal to be received.

In general, portable contactless power receivers such as mobile phones, PDAs, PMPs, DMB terminals, MP3s, and laptops cannot use ordinary home power sources, so they are equipped with disposable batteries or rechargeable batteries.

However, a charger for charging electricity to a battery for a contactless power receiver has a terminal supply method for receiving electricity from a general power source and supplying power to a battery pack through a power supply terminal for the battery. However, when the power is supplied by the terminal supply method, when the charger and the battery are coupled to or separated from each other, the terminals on both sides have different potential differences, and thus a momentary discharge phenomenon occurs. As a result, foreign materials gradually accumulate on both terminals, which may cause a fire. In addition, there is a problem that deteriorates the life and performance of the charger and battery, such as natural discharge due to moisture.

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

However, such a conventional contactless charger only supplies power to a portable terminal, and can not be used for other easy applications, thereby limiting its practicality.

Furthermore, if the metal is placed against the magnetic field generated by the primary coil, there is a possibility that problems such as damage of the contactless charger may occur due to considerable power loss in the primary coil.

The present invention for solving the above problems is to ensure that the battery cell is stably charged with respect to the power signal transmitted from the contactless power transmission device.

In particular, a compensation request signal for compensating according to a change in a voltage value of a power signal transmitted from a contactless power transmission device is transmitted so that a power signal is transmitted, so that a constant power signal is received.

In addition, for a contactless power transmission device having a plurality of charging blocks to receive and process the unique code of the corresponding charging block during the charging operation, if the transmission and reception state of the power signal is not correct to stop the charging operation The purpose is to prevent the contact power receiver from being damaged.

The contactless power receiver capable of multi-contact charging according to the present invention for achieving the above object is in the contactless power receiver 30 for receiving a power signal from the contactless power transmitter 10 to the contactless. The secondary side charging core 32 corresponding to the primary side charging core 13 of the contactless power transmission device 10 allows an induced current to be transmitted; A rectifier block 33 connected to the secondary side charging core 32 to rectify the induced current; A filter block block 34 connected to the rectifier block 33 to filter current; A charging circuit block 36 connected to the filter unit block 34 to charge power to the battery cell 35; It is provided between the charging circuit block 36 and the battery cell 35 detects a current charged in the battery cell 35 and transmits the charging state information of the battery cell 35 to the power reception control unit 39. A protection circuit block 37; A constant voltage regulator block (38) provided to supply power to the power reception control unit (39); And a power reception control unit 39 for controlling the rectifier block 33, the filter block 34, the charging circuit block 36, the protection circuit block 37, and the constant voltage regulator block 38. When the call signal for calling the unique ID value is received from the contactless power transmission apparatus 10, the power reception control unit 39 receives the response signal including the unique ID value. And transmits the power compensation request signal corresponding to the result to the contactless power transmitter 10 when comparing the magnitude of the received power signal with a reference value when the power signal is received.

Accordingly, the power reception control unit 39 is connected to the filter block 34 to process the power signal processing block for transmitting the transmission signal for the data information of the power signal transmitted and received from the contactless power transmission apparatus 10 ( 393); A charging signal processing block 394 connected to the charging circuit block 36 and the protection circuit block 37 to process a transmission signal for data information about the amount of charge and the state of charge charged in the battery cell 35; A signal processing block 392 processing the charge amount information and the data information for the unique ID to be sent to the contactless power transmitter 10 sent by the control of the device controller 390; The data information on the unique ID is stored, the charge amount information data transmitted from the protection circuit block 37, the charging circuit block 36 and the data on the charging state are temporarily stored, and transmitted from the contactless power transmitter 10. A device memory unit 391 in which data to be stored is stored; And a device controller 390 may be included.

The contactless power transmission device 10 is a contactless charging in which a full bridge resonant converter 22 and a central controller 21 for transmitting a power signal to the contactless power receiver 30 are contactless. The case 11 forms an outer body, and the contactless charging case 11 is provided with a contactless charging table 12 on an upper surface thereof, and the contactless charging table 12 is provided with a primary side charging core 13. A plurality of charging blocks 14 are formed, and the full bridge resonant converter 22 is connected to each of the plurality of charging blocks 14 so as to be provided in plural, and controls the central controller 21. The multi-gate driver module 23 for transmitting the power signal individually converted to each of the plurality of full bridge resonant converter 22 is provided, and is connected to the plurality of the charging block 14, the contactless power Transmitted from the receiver 30 A reception signal processing module 24 may be provided to process a signal and transmit the signal to the central control unit 21.

In addition, the contactless charging case 11 is provided with a power on / off switch 151, an input panel 152 for signal input on the front, the contactless charging table 12 and a plurality of the charging block 14 ) And an LCD panel 153 and a charging state LED 154 displaying the state of charge of the contactless power receiver 30, and a power supply unit 25 may be provided inherently.

In addition, the main controller 210 of the contactless power transmission device 10 is provided to control to transmit a unique code signal for the individual charging block 14 together with the charging power signal to the charging block for charging operation. The controller 390 is provided to analyze a unique code signal for the corresponding charging block 14 transmitted from the contactless power transmission device 10, and the device memory unit 391 is transmitted from the device controller 390. It may be provided to store the data value of the unique code signal for the corresponding charging block 14 is.

Further, the device controller 390 controls the data value of the voltage value of the power signal received with respect to the request signal received from the contactless power transmitter 10 to be transmitted to the contactless power transmitter 10. It may be provided.

The present invention provided as described above has an effect to be stably charged in the battery cell for the power signal transmitted from the contactless power transmission device.

In particular, the compensation request signal for compensating according to the change in the voltage value of the power signal transmitted from the contactless power transmission device to transmit the power signal is sent, there is an effect to receive a constant power signal.

In addition, for a contactless power transmission device having a plurality of charging blocks to receive and process the unique code of the corresponding charging block during the charging operation, if the transmission and reception state of the power signal is not correct to stop the charging operation There is an effect that the contact power receiver is not damaged.

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

1 is a perspective view of a multi-contact charging system according to the present invention, Figure 2 is a block diagram of a contactless power transmission apparatus according to the present invention, Figure 3 is a block diagram of a contactless power receiving device according to the present invention, 4 is a control flow chart for a contactless power transmission apparatus according to the present invention, FIG. 5 is a control flow chart for a contactless power receiver according to the present invention, Figure 6 is a control method of a multi-contact charging system according to the present invention. 7 to 12 are graphs showing the efficiency according to the power control in the multi-contact charging system according to the present invention, and FIGS. 13 and 14 are structures of the contactless power receiving device according to the present invention. Figure 15 is an exploded perspective view and a side cross-sectional view, Figure 15 is an efficiency graph for the charge-discharge repeating experiments for a contactless power receiver according to the present invention, Figure 16 is a seal for a wireless device control module of a contactless power receiver according to the present invention 17 is an exemplary circuit diagram of a rectifying member of a contactless power receiver according to the present invention, FIG. 18 is an embodiment diagram of a contactless power receiver according to the present invention, and FIG. 19 is a multi-layer according to the present invention. Each of the basic explanatory diagrams of the operation of the contactless charging system is shown.

That is, in the contactless power receiver 30 according to the present invention, as shown in FIGS. 1 to 19, a power signal is transmitted from the contactless power transmitter 10 of the multi-contact charging system A to a contactless state. And, it is made to receive and charge such a power signal.

In particular, the main configuration of the contactless power receiving device 30, the secondary side charging core 32 to correspond to the primary side charging core 13 of the contactless power transmission device 10 so that an induced current is transmitted; A rectifier block 33 connected to the secondary side charging core 32 to rectify the induced current; A filter block block 34 connected to the rectifier block 33 to filter current; A charging circuit block 36 connected to the filter unit block 34 to charge power to the battery cell 35; It is provided between the charging circuit block 36 and the battery cell 35 detects a current charged in the battery cell 35 and transmits the charging state information of the battery cell 35 to the power reception control unit 39. A protection circuit block 37; A constant voltage regulator block (38) provided to supply power to the power reception control unit (39); And a power reception control unit 39 for controlling the rectifier block 33, the filter block 34, the charging circuit block 36, the protection circuit block 37, and the constant voltage regulator block 38. It is provided.

In addition, the power reception control unit 39 is connected to the filter block 34, the power signal processing block for processing the transmission signal for the data information of the power signal transmitted and received from the contactless power transmission apparatus 10 (393); A charging signal processing block 394 connected to the charging circuit block 36 and the protection circuit block 37 to process a transmission signal for data information about the amount of charge and the state of charge charged in the battery cell 35; A signal processing block 392 processing the charge amount information and the data information for the unique ID to be sent to the contactless power transmitter 10 sent by the control of the device controller 390; The data information on the unique ID is stored, the charge amount information data transmitted from the protection circuit block 37, the charging circuit block 36 and the data on the charging state are temporarily stored, and transmitted from the contactless power transmitter 10. A device memory unit 391 in which data to be stored is stored; And a device controller 390 is included.

In the contactless power transmission device 10 of the multi-contact charging system (A), the contactless charging case 11 forms an external body, and the contactless power receiving device inside the contactless charging case 11. The full bridge resonant converter 22 and the central controller 21 for transmitting the power signal to the contactless point 30 are embedded.

In addition, the contactless charging case 11 is provided with a contactless charging table 12 on the upper surface, the contactless charging table 12 is a plurality of charging block 14 is provided with a primary side charging core 13 Is formed.

Accordingly, the full bridge resonant converter 22 is connected to the plurality of charging blocks 14 respectively, and is provided in plurality, and the plurality of full bridge resonant converters 22 are controlled by the central controller 21. A multi-gate driver module 23 for transmitting the converted power signal individually to the) is provided, and also connected to a plurality of the charging block 14 to transmit a signal transmitted from the contactless power receiver 30 The reception signal processing module 24 for processing and transmitting to the central control unit 21 is provided.

In addition, the contactless charging case 11 is provided with a power on / off switch 151 and an input panel 152 for signal input on the front surface of the contactless charging table 12 and the plurality of charging blocks 14. And the LCD panel 153 and the state of charge LED 154 to display the state of charge of the contactless power receiving device 30 is provided, the power supply unit 25 is inherently provided.

Thus, the plurality of charging blocks 14 formed on the top of the contactless charging case 11 as shown in the example of FIG. 1 includes a portable contactless power receiving device 30 such as a mobile phone, PDA, PMP, DMB terminal, MP3 or notebook computer. ) Is placed, and when the contactless power receiving device 30 is placed, the contactless power transmission device 10 detects this and performs a charging operation.

In addition, referring to the configuration of the central control unit 21 for controlling the charging operation in the contactless power transmission device 10, as shown in Figure 2, the power supply of the contactless power transmission device 10 is connected to the power supply 25 A power supply block 211 for supplying a signal, a signal output block 212 for outputting a display signal to the LCD panel 153 and the state of charge LED 154, the multi-gate driver module 23 is connected to the 1 A gate output signal processing block 213 for transmitting a power signal transmitted from the secondary charging core 13 and a signal connected from one side of the primary charging core 13 to transmit a signal transmitted from the contactless power receiver 30. A reception signal processing block 214 for processing a signal transmitted from the reception signal processing module 24 for processing, and the power supply block 211, the signal output block 212, and the gate output signal processing block 213. And a main word controlling the received signal processing block 214. Will be provided is included (210).

In addition, the main configuration of the contactless power receiving device 30, which is placed and charged in the plurality of charging blocks 14 that are the upper portion of the contactless charging case 11 of the contactless power transmission device 10, as shown in FIG. The secondary side charging core 32 corresponding to the primary side charging core 13 of the contact power transmission device 10 to transmit the induced current from the magnetic field, and the secondary side charging core 32 are connected to rectify the induced current. A rectifier block 33, a filter block block 34 connected to the rectifier block 33 to filter current, and a charging circuit block connected to the filter block block 34 to charge power to the battery cell 35. 36, a power reception control unit configured to detect a current charged in the battery cell 35 between the charging circuit block 36 and the battery cell 35 to detect charging state information of the battery cell 35. The protection circuit block 37 for transmitting to 39, the power supply to the power reception control unit 39 The constant voltage regulator block 38, the rectifier block 33, the filter block 34, the charging circuit block 36, the protection circuit block 37, and the constant voltage regulator block 38 are provided. A power reception control unit 39 for controlling is included.

The multi-contact charging system (A) according to the present invention provided as described above is that the contactless charging table 12 of the upper surface of the contactless power transmission device 10 is formed of a plurality of charging blocks (14) , There is an advantage to be able to charge several contactless power receiver 30 at a time.

Looking at the charging operation of the multi-contact charging system (A) according to the present invention provided as described above are as follows.

1) First, in the contactless power transmission apparatus 10 of the multi-contact charging system A, the gate output signal processing block 213 under the control of the central control unit 21-the multi-gate driver module 23- Full bridge resonant converter 22-Standby mode step (S01) in which the power signal for each cycle is transmitted through the gate signal line 234 to the corresponding primary side charging core 13 of each charging block 14, etc. are performed. Will be. As described above, in the standby mode step (S01), the power signal is transmitted through the primary charging core 13 for each cycle, but the power signal includes a call signal for calling a unique ID value of the contactless power receiver 30. As a result, the reception of the response signal is awaited.

2) After receiving the response signal for the unique ID value call signal through the standby mode step (S01), the load modulation through the primary charging core 13 of any one of the plurality of charging blocks 14 The object detection step (S02) to receive the detection signal according to performs. When detected by any object as described above, as well as a portable contactless power receiver 30 capable of contactless charging such as a mobile phone, PDA, PMP, DMB terminal, MP3 or laptop, as well as metal, non-metallic material and no General electronic devices and the like that are not capable of contact charging may be placed on the charging block 14. Therefore, when receiving a signal due to the load modulation generated by any of such objects as a detection signal, the contactless power transmission device 10 first distinguishes whether the object is placed on the upper surface of the charging block 14, the object is separated. Will be determined.

In this case, such as non-metal or in the case of load modulation due to the movement of the object can be switched to the standby mode step (S01) when no special problem occurs. However, in the case of a non-contact power receiving device 30 capable of contactless charging, in the case of a metal object or an electronic device incapable of contactless charging, there is a concern that a phenomenon such as heat generation and abnormal operation of the device may occur due to the charging operation. have.

Therefore, the object detecting step (S02), is provided to include a foreign material detection step (S021) that is a step for detecting such foreign matter (PMD, Parasitic Metal Detection). That is, the foreign matter detection step S021 detects a detection signal according to a load modulation generated by an object among the plurality of charging blocks 14 through the corresponding primary side charging core 13 and the reception signal processing module 24. When the detected detection signal is not a normal signal, it is detected as a signal that is not normal due to load modulation on a signal transmitted by the control of the central controller 21. Therefore, when detected as a foreign matter, the charging block 14 switches to a foreign matter detection state, and when the detected foreign matter is a metal or electronic device, a foreign material error indication is displayed on the LCD panel 153 or the state LED 154. And, it is to operate to stop the charging operation for the charging block 14 (PMD error, Parasitic Metal Detection error).

3) However, when the detected received signal is determined as data for a unique ID of the contactless power receiver 30 capable of contactless charging, a unique ID discrimination step of analyzing and detecting the signal detected by load modulation (S03). ). Accordingly, in the standby mode step (S01), while transmitting a signal for searching the contactless power receiver 30 and transmits a request signal requesting also the data value of the unique ID of the contactless power receiver 30 In contrast, in the contactless power receiver 30, the induced current generated by the secondary side charging core 32 is rectified through the rectifier block 33 and then filtered through the filter block 34. The unique ID request information received during this process is transmitted to the device controller 390 of the power reception control unit 39, and accordingly the unique ID data value of the corresponding contactless power receiving device 30 stored in the device memory unit 391. The signal is transmitted to the contactless power transmitter 10 through the signal processing block 392. Therefore, in the unique ID determination step (S03), the reception signal processing module 24 connected to the primary side charging core 13 of the contactless power transmission device 10 processes the reception signal received by load modulation to process the reception signal. The block 214 is transmitted to the main control unit 210 of the central control unit 21. The main controller 210 first determines whether the received data is in the form of a unique ID data of the normal contactless power receiver 30, and then applies the unique ID data sent from the normal contactless power receiver 30. Discriminate whether or not it is a normal equipment.

4) If it is determined that the unique ID transmitted from the contactless power receiving device 30, the full power transmission power in the primary charging core 13 of the charging block 14 through the multi-gate driver module 23 Perform a full power power transmission step (S04) to be sent.

Looking at the full-power power transmission step (S04) process in the contactless power transmission device 10, the contactless power receiver (normal) on the top of the charging block 14 in the main control unit 210 of the central control unit 21 ( 30, the control signal according to the transmission of the power signal is transmitted through the gate output signal processing block 213 and the gate signal line 234.

The control signal according to the power signal transmission is transmitted to the multi-gate driver module 23, the power signal is transmitted to the primary charging core 13 of the charging block 14 via the full bridge resonant converter (22) By induction magnetic field generation, a power signal is transmitted to the contactless power receiver 30.

In this series of processes, the configuration of the gate signal line 234 and the multi-gate driver module 23 may be configured in the following embodiments.

First, the gate signal line 234 may be composed of a plurality of signal lines corresponding to each charging block 14. Therefore, the control signal of the main control unit 210 is transmitted to the multi-gate driver module 23 through the respective corresponding signal line of each gate signal line 234, the multi-gate driver 23 for the gate signal processing gate And a signal converter 232, an output driver 233 for transmitting the processed signal to the corresponding full bridge resonant converter 22, and a gate controller 231.

Therefore, since the gate signal line 234 is composed of a plurality of signal lines corresponding to the individual charging blocks 14, and thus the main control unit 210 is configured to transmit individual control signals for each of the individual charging blocks 14, The gate signal conversion unit 232 of the multi-gate driver module 23 may be configured of a plurality of conversion members corresponding to individual charging blocks 14.

In addition, the gate control unit 231 may be configured to control signal transmission and reception and signal processing in the multi-gate driver module 23. In this embodiment, the control signal transmitted from the main control unit 210 is transmitted to the members corresponding to the corresponding charging block 14, the power signal is transmitted accordingly, the induction magnetic field is stably transmitted, so that the small contact point There is an advantage suitable for the configuration of the power transmission apparatus 10.

In another embodiment of the multi-gate driver module 23 and the gate signal line 234, the gate signal line 234 may be configured as a single line, and the gate of the multi-gate driver module 23 corresponding thereto may also be formed. The signal conversion unit 232 may also be composed of a single conversion member or a plurality of conversion members.

On the other hand, the main control unit 210 transmits a control signal to the multi-gate driver module 23, but transmits a code signal for the charging block 14 prior to the conversion signal in the control signal, and receives the multi-gate. The gate controller 231 of the driver module 23 determines which charging block 14 the control signal transmitted from the main controller 210 corresponds to, and transmits the converted power signal to the corresponding charging block 14. It may be configured to transmit to the full bridge resonant converter (22).

Therefore, the main controller 210 and the multi-gate driver module 23 can be simplified, so that the contactless power transmission device 10 and the contactless power reception device 30 are configured to be suitable when large. It can be.

5) Then, the charging state information is requested to the contactless power receiving device 30 and the charging control step (S05) of controlling the charging degree is performed according to the charging information of the contactless power receiving device 30 returned.

In the contactless power receiver 30, as shown in FIGS. 3 and 5, the rectifier block 33 and the filter block 34 are controlled by the control of the device controller 390 after the full power power transmission step S04. The power supplied through the charging circuit block 36 and the protection circuit block 37 to control the battery cell 35 to be charged.

In response to such a charging operation, the device controller 390 receives information on a state of being charged in the battery cell 35 through the charging circuit block 36 and the protection circuit block 37. Temporarily stored in the unit 391. Further, when the battery cell 35 is in the fully charged state, the charging operation is stopped by controlling the charging circuit block 36, and the secondary charging core 32 receives the full charging information through the signal processing block 392. It will be provided to occur in. In addition, when the voltage at the charged battery cell 35 is lower than the predetermined reference voltage, the charging state may be switched back to continue the charging operation. However, if it is determined that the state of full charge, the state of charge is terminated (No Operation).

Therefore, in the charge control step (S05), the main control unit 210 of the contactless power transmission device 10 requests the status information on the level of charging of the contactless power receiving device 30 step by step, for this contactless power reception The device controller 390 of the device 30 is configured to transmit the charging state information data of the battery cell 35 to the contactless power transmission device 10 through a load modulation scheme.

In this way, the charging information transmitted from the contactless power receiver 30 is transmitted to the main control unit 210 connected to the reception signal processing block 214 through the reception signal processing module 24. The reception signal processing module 24 converts a plurality of reception signal input units 243 for receiving signals detected by load modulation in the individual charging blocks 14 and detection signals according to load modulation of each charging block 14. The reception signal processing unit 242 and the reception signal control unit 241 for controlling the operation of the reception signal processing module 24 may be included.

Therefore, the transmission information of the contactless power receiver 30 received by load modulation is converted into a signal according to the individual charging block 14 in the reception signal processing module 24 and then through the reception signal processing block 214. It is transmitted to the main control unit 210.

In the received signal processing module 24, generally, a plurality of amplifiers, LPFs, OR circuits, and the like may be configured. In particular, the configuration of the reception signal processing unit 242 and the reception circuit line 244 of the reception signal processing module 24 is composed of a plurality of members, as in the embodiment of the multi-gate driver module 23 described above. It may also be composed of a single member.

That is, when the signal according to the load modulation is transmitted for each charging block 14, the receiving signal processing unit 242 of the embodiment consisting of a plurality of processing each signal separately, and then through the separate line of the receiving signal line 244 the main control word The signal is transmitted to the unit 210. Therefore, the signal generated from the charging block 14 by the separate signal processing and separate lines are transmitted to the main controller 210 accurately, so that the system can be stably operated. In addition, it can be suitably applied to small devices as in the multi-gate driver module 23 described above.

Furthermore, in the embodiment in which the reception signal processing unit 242 and the reception signal line 244 are configured as a single unit, the received signal according to the load modulation is received for a certain charging block 14 by the control of the reception signal control unit 241. It is determined whether or not the signal, and thus the received signal is processed to transmit the code signal with respect to the charging block 14, when transmitted through the reception signal processing block 214, the main control unit 210 The signal is received and processed for each received signal for the individual charging block 14.

Therefore, such a single member configuration has the advantage of simplifying the configuration of the entire member to be applied.

Thus, the contactless power transmission device 10 is a contactless power reception device 30 which is charged by the charging block 14 and transmits data information on the degree of charging to the multi-gate driver module according to the corresponding charging block 14 ( 23) and the request via the primary side charging core 13, and in the contactless power receiver 30, the battery cell 35 received through the charging circuit block 36, the protection circuit block 37, and the like. ) Will transmit data information about the degree of charge.

The information is transmitted to the main controller 210 through the primary charging core 13 and the reception signal processing module 24 of the individual charging block 14.

Thus, according to the data on the degree of charge of the contactless power receiving device 30, the main control unit 210 of the central control unit 21 through the signal output block 212 to the LCD panel 153 through the letters or figures The charging degree or status information is displayed, and the charging state LED 154 is controlled to display that the charging operation is in progress. The LCD panel 153 displays the charging state together with the number of the charging block 14. In addition, the charge state LED 154 for each of the individual charging block 14 to be distinguished to be displayed, but look at an example of the lamp light of the charge state LED 154, when it is off, the charging operation is stopped, when the flashing light is charged It is in progress, and can be operated according to various lighting methods, such as being configured to light up with a green light when fully charged and a red light when an error such as foreign matters.

When the contactless power receiving device 30 is moved from the corresponding charging block 14 of the contactless charging table 12 during the series of charging processes, the corresponding charging block 14 of the contactless power transmitting device 10 It may be configured to maximize the charging efficiency in the contactless power receiver 30 by changing the power signal transmitted.

6) After the full charge information is received from the contactless power receiver 30, the full charge state is displayed on the LCD panel 153 or the charge state LED 154 corresponding to the corresponding charge block 14, and the charging operation is performed. By performing a full charge state step (S06) to stop, the charging operation for the charging block 14 is stopped.

For the stationary charging block 14 thus removed, it is preferable that the user removes the fully charged contactless power receiver 30 and then waits until the operation start signal is input again.

In addition, in the foreign matter detection step, when the foreign matter error state or ID error state that detects the foreign matter, the error state is displayed, and then the operation of the corresponding charging block 14 is stopped and the contactless power transmission apparatus 10, no It is to ensure the safety for the contact power receiving device 30 or other metal materials and electronic devices. Therefore, even when the operation of the charging block 14 is stopped due to such an error, it is desirable to be in a standby state until the user inputs a signal for reactivation.

Of course, the error state or the full charge state, by sending a pulse signal periodically and the signal caused by the load modulation caused by this, the error is caused by the fully charged contactless power receiver 30 is removed, foreign matter is removed, etc. If it is detected that the resolution, it may be provided to switch to the normal standby mode step.

In addition, the main control unit 210 of the contactless power transmission apparatus 10 may be provided to control to transmit a unique code signal for the individual charging block 14 with the charging power signal to the charging block for the charging operation, The device controller 390 is provided to analyze a unique code signal for the charging block 14 transmitted from the contactless power transmission device 10, the device memory unit 391 is the device controller ( It may be provided to store the data value of the unique code signal for the charging block 14 transmitted from 390.

Further, the device controller 390 controls the data value of the voltage value of the power signal received with respect to the request signal received from the contactless power transmitter 10 to be transmitted to the contactless power transmitter 10. It is provided.

The power supplied to the power supply unit 25 may be a power input from a USB port of a computer, an AC adapter, a cigar jack, or the like.

In addition, the charging process includes a temperature detector 26 for detecting the temperature of the charging block 14 or the contactless power transmission device 10 during the charging process, when the temperature is detected by the temperature detector 26, the corresponding charge The operation of the block 14 may be stopped and may be configured to suspend the operation of the entire system if the contactless power transmission apparatus 10 is overheated as a whole.

Furthermore, the power supply unit 25, the multi-gate driver module 23, the individual full bridge resonant converter 22 or the reception signal processing module 24 may be provided with a current sensing member for monitoring the flow of current, respectively. The current sensing member may be configured to stop the operation of the charging block 14 associated with the member or to stop the operation of the system when the current sensing member is in an overcurrent or overvoltage state.

16 is a circuit diagram of an embodiment of a wireless device control module of a contactless power receiver according to the present invention, and shows that members of the device control of the contactless power receiver 30 may be formed of a single mold. . That is, the function of wireless communication with the contactless power transmission device 10, the pre-driver and FET for ID generation, the comparator for analog input, the power on reset as an analog unit, the clock oscillator circuit (Clock oscillating circuit), 64-bit internal and external ID and control logic may be configured and implemented. The mold may be switched to the recharging mode by detecting the battery voltage, the feedback of the full charge state value of the charger IC, the phase detection function to recognize the encryption code, and the like may be performed. Output ports for controlling a DC / DC converter or charger IC, analog inputs and comparators for controlling power up or down, input / output pods for setting various modes, and the like can be designed.

FIG. 17 is a circuit diagram of an embodiment of a rectifying member of a contactless power receiver according to the present invention, in which a member for processing a power signal transmitted from the contactless power transmission device 10 is formed as a single mold. Illustrates that it can.

Looking at the configuration of such a mold, the synchronous rectification chip assists in adjusting the power of the receiving module in the power receiving battery system using induction electromotive force. Therefore, a synchronous rectifier for generating a DC voltage from a receiving coil to minimize power loss and heat generation, and a buck-converter used to pre-control the rectifier output to supply a constant voltage to a charging circuit may be configured. These buck-converters can switch the rectifier output ribs at high speeds of 2MHz for reduced and ultra-small chip inductors. In addition, the output of the Buck-Converter can be used as an input to the linear charging circuit, and the built-in linear charging function can charge the battery in CC / CV, and can be designed to set the charging current. This linear charging function has a built-in full charge status port to receive feedback on the battery's state of charge, and has an output voltage of 2.85V to supply power to a power receiver chip (wireless device control module). The LDO can be integrated to supply currents up to 10mA.

The synchronous rectifier chip has low heat generation, a small 0.4V drop characteristic of the rectifier stage, a built-in 2MHz Buck-Converter for high efficiency, maintains a maximum input voltage of about 20V, and can be embedded in a battery pack in a Micor SMD package. It is optimized for contactless power transfer in the hundreds of kHz band. The Rdson value of Buck-Converter's PFET is 240mOhm, and the maximum load current is 700mA and 2.85V@10mA LDO can be integrated.

Next, look at the power control process in the charge control step (S05) as follows.

That is, the power signal transmitted by the primary side charging core 13 of the contactless power transmission apparatus 10 is transmitted through the secondary side charging core 32 of the contactless power receiving apparatus 30, and the input of such a power signal Information regarding the voltage strength is received by the device controller 390. If it is detected that the voltage (for example, 5V) of the received power signal is transmitted at a stable voltage, it is preferable to configure it to be kept constant. When the voltage of the received power signal is received at a low voltage or at a voltage that is too high, the voltage adjustment information is transmitted to the contactless power transmission apparatus 10 in a load modulation manner so as to be received at a constant voltage. Can be. Thus, when the voltage is adjusted to a constant voltage, the controller 390 controls the operation of the charger IC of the charging circuit block 36 of the contactless power receiver 30 to make an active state to charge the battery cell 35 with power. Done.

As such, when the battery cell 35 of the contactless power receiver 30 is charged with the power transmitted from the contactless power transmitter 10, the charging of the battery cell 35 is performed. The stability is determined by the protection circuit block 37 so that the stable charging may be performed.

During the charging operation of the multi-contact charging system A including the contactless power transmission device 10 and the contactless power reception device 30, it is placed on the corresponding charging block 14 of the contactless power transmission device 10. When the contactless power receiving device 30 is moved, the positions of the primary charging core 13 and the secondary charging core 32 are changed so that the reception rate of the power signal received by the contactless power receiving device 30 is lowered. do. 7 and 8, the primary side charging core 13 and the secondary side charging core 32 are inefficiently positioned as they move away from the center in the horizontal or vertical direction, so that the induced electromotive force is reduced in the contactless power receiver 30. It doesn't happen very well.

Therefore, in the multi-contact charging system (A) of the present invention, when the voltage of the power signal received by the contactless power receiver 30 placed on the corresponding charging block 14 is lower than the reference value, the contactless power so as to be reinforced and transmitted. The transmission device 10 transmits a request signal for compensation.

For example, assuming that the voltage of the received power signal is set to 5V and the reference deviation value is set to 0.5V, when the contactless power receiver 30 is received at a voltage lower than 4.5V, it is 0.5. It is controlled by the device controller 390 of the contactless power receiver control module 39 to be boosted by about V, so that the boost request signal is sent from the secondary charging core 32 via the signal processing block 392. .

The contactless power transmission apparatus 10 transmits the enhanced power signal for the 0.5V step-up request signal. That is, as an example of a method of increasing the outgoing power output from the contactless power transmission apparatus 10, it may be controlled to change the oscillation frequency.

In this way, the power signal transmitted from the contactless power transmission apparatus 10 is provided to be adjusted according to the position change of the contactless power receiver 30, and the charging efficiency according to the position change is illustrated in FIGS. 7 to 12. It is.

7 to 10 illustrate a case where the secondary reference power of the contactless power receiver is about 2.5W, and the contactless power receiver 30 corresponds to the corresponding charging block 14 of the contactless power transmitter 10. Primary power (W) in contactless power transmitter and secondary power (W) in contactless power receiver measured while moving between -7 mm and 7 mm in horizontal and vertical direction from above, respectively Efficiency (%) is shown. The efficiency (%) is expressed as the efficiency ((secondary side power / primary side power) * 100) for the output side power applied to the secondary side of the contactless power receiver with respect to the primary input power of the contactless power transmitter. will be.

In addition, the transmission power compensation according to the present invention is shown as a step 0.5W, and in FIG. 7 and FIG. 8, the secondary power of the contactless power receiver is shown as a graph between 2 and 2.5 W, and the contactless power is shown. The charging efficiency in the case of being charged without compensation of the power signal according to the frequency change in the contactless power transmitter 10 with respect to the change in the horizontal distance and the vertical distance between the transmitter 10 and the contactless power receiver 30 is shown. will be. That is, when the contactless power receiver 30 moves in the horizontal or vertical direction with respect to the contactless power transmitter 10, the secondary power of the contactless power receiver 30 is farther away from the center, and thus the efficiency is reduced. You can see this goes down.

However, in the multi-contact charging system A according to the present invention as shown in Fig. 9 (graph according to horizontal movement) and Fig. 10 (graph according to vertical movement), the multi-contact battery pack 10 As the contactless power receiver 30 is moved in the horizontal direction and the vertical direction, respectively, on the upper surface of the charging block 14), the information of the received power voltage change in the contactless power receiver is transmitted. By controlling the power by changing the frequency in the transmission device 10 to show its efficiency, it can be seen that the power transmission is stable, thereby indicating that the power transmission efficiency is also in a good state.

FIG. 11 is an efficiency graph for horizontal movement, and FIG. 12 is an efficiency graph for movement in the up and down direction, compared to a case in which the power transmission compensation operation is not performed according to frequency change (lower curve graph, FIXED POWER) In addition, it can be seen that the efficiency of the power transmission compensation operation according to the change of the frequency (upper square graph, POWER CONTROL) is good.

Therefore, the contactless power transmission is performed in a stable state by supplying power by the contactless power transmission of the multi-contact charging system A, which is the contactless power transmission device 10 and the contactless power reception device 30. The contactless power transmitter 10 and the contactless power receiver 30 of the contactless charging system A can be used as a stable system.

In particular, the charging method by the power compensation in the charge control step (S05) in which such a contactless power transfer is performed, a plurality of charging blocks 14 are provided in the contactless power transmission apparatus 10 as in the present invention In the configuration it can be used with a better charging method.

That is, in a state in which a plurality of charging blocks 14 are configured above the contactless charging table 12 as shown in FIG. 1, the contactless power receiver 30, which may be of various types, is positioned to perform a charging operation. do.

The contactless power receiver 30 may be a portable contactless power receiver such as a mobile phone, PDA, PMP, DMB terminal, MP3 or laptop, one contactless to the charging block 14 of one side While the charging operation is performed in a contactless state in which the power receiver is placed, another contactless power receiver is placed in the charging block on the other side, so that charging can be newly performed.

Therefore, when the user touches the contactless power receiver which has already been charged, or when the contactless power transmitter 10 is shaken, the contactless power receiver of the charging unit 14 that is being charged with the primary side charging core 14 The position of the secondary side charging core may change. Thus, since the contactless power receiving device that is being charged by the charging power compensation as described above is provided to be charged at a stable voltage, the charging operation can be continued without a significant problem during the process of full charge of the device.

In addition, the multi-contact charging system (A) of the present invention is charged by placing a contactless power receiver on each individual charging block 14, but a small size mobile phone can be used, but a large size capable of contactless charging A contactless power receiver may be placed and charged.

The secondary charging core of the contactless power receiving device can be charged with the primary charging core of one charging block, but the charging operation can be performed. However, since the contactless power receiver is large, the secondary charging core is not formed. The other part of the power receiver is placed on another charging block. At this time, the other charging block is switched to the foreign matter error state to stop the power transmission, there is an advantage to prevent other parts of the contactless power receiver is damaged.

In addition, since the contactless charging operation cannot be performed even with a metal part of the contactless power receiver, the charging blocks in which the part is located are also switched to a foreign material error state and the power transmission is stopped. Therefore, the contactless charging operation is performed only at the charging block in which the secondary side charging core is located for the large sized contactless power receiver, and the contactless power receiver and the contactless power transmitter are stably charged due to the power transmission. It is done.

Furthermore, the contactless power receiver 30 according to the present invention has a secondary side of the primary side charging core 13 and the contactless power receiver 30 of the contactless power transmitter 10 as shown in FIGS. 13 to 15. A shielding member is provided to protect the contactless power receiver 30 and the battery cell 35 from the magnetic field generated by the charging core 32.

13 is an exploded perspective view according to the configuration of a contactless power receiver 30 having a wireless power receiver module. The contactless power receiver includes a coil, fine metal, thin film aluminum (foil, etc.), lithium ion, or lithium polymer. In order to block 100% of the magnetic field, a thin film of aluminum is added so as not to affect the cell, and the cell cycle is provided to be able to charge and discharge more than 500 times. Here, the shape of the secondary side filling core includes all types of cores. That is, it can be provided in various shapes, such as a core coil, a spiral core, etc. in rectangular shape, circular shape, or ellipse shape. Thus, the contactless power receiver 30 having the wireless power receiving module includes a wireless power control module 24 and a charging circuit block 36 and the like on one side of the rechargeable battery cell 35. Circuit (Wireless Power Receiver Circuits) 40, the wireless power receiver circuit 40 may be configured to include a shield member 41 for blocking the magnetic field surrounding.

And a shielding plate provided in the bottom, front, rear, left, and right directions around the battery cell 35 to shield the magnetic fields of the primary side charging core and the secondary side charging core 32 to protect the battery cell 35 from the magnetic field. (42) (43) (44) (45) 46 were provided.

Thus, the shield plates 42, 43, 44, 45, and 46 are respectively provided in five directions, which are the front, rear, left, and right directions of the battery cell 35, and the primary side charging core and the secondary side charging core portion ( The magnetic field generated by 32 is completely blocked to prevent the rechargeable battery cell 35 from being damaged from the magnetic field. In addition, if necessary, the upper surface of the battery cell 35 may also be provided with a separate shielding plate, and in this case, it is irrelevant to prevent the temperature rise due to the enclosed surrounding of the battery cell 35.

The shield plates 42, 43, 44, 45, 46 and the shield member 41 may be formed of a thin plate body including Al, Cu, Ni alloy metal.

And a magnetic plate to guide the magnetic field guided to the secondary side charging core 32 between the lower shield plate 46 of the battery cell 35 and the charging receiver module 321 having the secondary side charging core 32 is well guided. (48) was provided. The magnetic plate 48 is an amorphous ferrite series, Mn-Zn (50 parts by weight: 50 parts by weight), Ni-Fe (80 parts by weight: 20 parts by weight), or fine metal (Fe-metal) (Fe − Si-Cu-Nb) etc. are comprised.

The magnetic plate 48 is an upper magnetic plate 481 between the shielding plate 46 and the charging receiver module 321 and a lower magnetic plate 482 positioned below the charging receiver module 321. Can be configured. Accordingly, the lower magnetic plate 482 has formed a lower plate through hole, in particular, a through hole penetrating up and down to the center side. The shape of the lower plate hole 483 is preferably formed in the same shape as the core shape of the secondary side filling core 32. Accordingly, in FIG. 13, since the secondary side charging core 32 is formed as a circular core, the lower plate through hole 483 of the lower magnetic plate 482 is formed in a circular shape. However, if the core is formed in a quadrangular shape or polygonal shape, it is preferable that the lower plate hole 483 is also formed in the same shape. Thus, the lower plate hole 483 is configured so that the induced electromotive force is generated well in the secondary charging core 32 in the induced magnetic field and the signal transmission and reception is good.

In addition, an insulating plate 47 is provided between the lower shielding plate 46 of the battery cell 35 and the battery cell 35 to insulate the battery cell 35 from each other. The insulating plate 47 is formed in the form of a mesh or a thin film of Ni-Cu so that the heat of the shielding plate 46 is not conducted to the battery cell 35.

As another example of such a magnetic field shielding member, as shown in FIG. 14, a magnetic plate 48 (1) is formed between an aluminum-based battery cell case 35 ′ forming an outer body of the battery cell 35 and a secondary side charging core 32. Primary HPES: Hanrim Postech Electro-magnetic shield is provided, but the secondary mesh is a shield mesh member 49 is further provided between the magnetic plate 48 and the battery cell case (35 ') of the primary HPES. The magnetic plate 48, which is the primary HPES, and the shielding mesh member 49, which is the secondary HPES, can be configured as the components of the shielding member mentioned above.

Most of the magnetic device is shielded by the magnetic plate 48, which is the primary HPES, and as shown in FIG. 14, the magnetic force lines are bent by the magnetic plate 48, which is the shielding plate, and thus does not affect the battery cell. In the apex portion, heat is generated by the magnetic lines, and the heat is radiated to the outside by the magnetic magnetic plate 48. Furthermore, the shielding mesh member 49, which is the secondary HPES, is a mesh of metal mesh, an amorphous ferrite series, Mn-Zn (50 parts by weight: 50 parts by weight), Ni-Fe (80 parts by weight: 20 parts by weight), Alternatively, it is formed by coating a coating agent such as fine metal (Fe-Si-Cu-Nb), and a shielding mesh that is a second HPES to shield a magnetic field that cannot be shielded from the magnetic plate 48, which is a primary HPES. To be shielded from member 449. The eddy current is formed by the surplus magnetic force lines by the metal mesh of the shielding mesh member 49 which is the secondary HPES, and the battery is caused by the magnetic field generated by the primary side charging core and the secondary side charging core due to the eddy current in the mesh. The pack is provided so as not to be affected. Experiments have shown that approximately 90% is shielded by the magnetic plate 48, which is the primary HPES, and approximately 10%, is shielded by the shielding mesh member 49, which is the secondary HPES.

The charge repetition test was repeated 500 times (500 cycles) using the contactless power receiver 30 provided by applying the magnetic plates 48 and the shielding mesh member 49, which are the first HPES and the second HPES. Charging efficiency was tested. FIG. 15 is a graph of a test based on an 80% efficiency curve based on 500 charge / discharge repeats, which are stable charge repetition efficiency (hereinafter referred to as a “reference efficiency line” (D)), without first being exposed to a magnetic field. In the case of generally charging and testing the electrical contact (graph shown by " N " in FIG. 15), it is tested to be shown on the upper part of the reference efficiency line, indicating a stable efficiency.

On the other hand, for the contactless power receiver 30 according to the present invention, the charge / discharge efficiency by the magnetic plate 48 and the shielding mesh member 49, which are the primary HPES and the secondary HPES, is (A in FIG. 15). The graph shows a stable efficiency of 83.9% based on 500 times.

However, the charging / discharging efficiency when the second HPES is not applied (graph shown by “B” in FIG. 15) represents an efficiency of 75.3% based on 460 times, and both the primary HPES and the secondary HPES are not applied. In the case of the charging and discharging efficiency (graph shown by "C" in Fig. 15) there is a problem that the efficiency is lowered, such as the efficiency of 340 times less than 500 times 74.5%, but in the case of the present invention efficiency It can be seen that it is much better.

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 perspective view of a multi-contact charging system according to the present invention.

2 is a block diagram of a contactless power transmission apparatus according to the present invention.

3 is a block diagram of a contactless power receiver according to the present invention.

Figure 4 is a control flow diagram for a contactless power transmission apparatus according to the present invention.

5 is a control flow diagram for a contactless power receiver according to the present invention.

Figure 6 is a control block diagram for a control method of a multi-contact charging system according to the present invention.

7 to 12 is a graph of the efficiency according to the power control in the multi-contact charging system according to the present invention.

13 and 14 are an exploded perspective view and a side cross-sectional view of the structure of a contactless power receiver according to the present invention.

15 is a graph of efficiency for repeated charge and discharge experiments for a contactless power receiver according to the present invention.

16 is a circuit diagram of an embodiment of a wireless device control module of a contactless power receiver according to the present invention;

17 is a circuit diagram of an embodiment of a rectifying member of a contactless power receiver according to the present invention;

18 is an exemplary embodiment of a contactless power receiver according to the present invention.

19 is a basic explanatory diagram of the operation of the multi-contact charging system according to the present invention.

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

A: Multi-contact charging system

10: contactless power transmission device 11: contactless charging case

12: contactless charging table 13: primary charging core

21: central control unit 23: multi-gate driver module

24: reception signal processing module 30: contactless power receiver

Claims (6)

In the contactless power receiver 30 that receives a power signal from the contactless power transmitter 10 to a contactless state, A secondary side charging core 32 corresponding to the primary side charging core 13 of the contactless power transmission device 10 to transmit an induced current; A rectifier block 33 connected to the secondary side charging core 32 to rectify the induced current; A filter block block 34 connected to the rectifier block 33 to filter current; A charging circuit block 36 connected to the filter unit block 34 to charge power to the battery cell 35; It is provided between the charging circuit block 36 and the battery cell 35 detects a current charged in the battery cell 35 and transmits the charging state information of the battery cell 35 to the power reception control unit 39. A protection circuit block 37; A constant voltage regulator block (38) provided to supply power to the power reception control unit (39); And a power reception control unit 39 for controlling the rectifier block 33, the filter block 34, the charging circuit block 36, the protection circuit block 37, and the constant voltage regulator block 38. To be equipped, The power reception control unit 39, When a call signal for calling a unique ID value is received from the contactless power transmitter 10, the response signal including the unique ID value is transmitted to the contactless power transmitter 10, and when the power signal is received, the received signal is received. A contactless power receiver capable of multi-contact power charging, characterized in that the size after power is compared with a reference value and transmits a power compensation request signal corresponding to the result to the contactless power transmission apparatus (10). The method of claim 1, The power reception control unit 39, A power signal processing block 393 connected to the filter block 34 to process a transmission signal for data information of a power signal transmitted and received from the contactless power transmission device 10; A charging signal processing block 394 connected to the charging circuit block 36 and the protection circuit block 37 to process a transmission signal for data information about the amount of charge and the state of charge charged in the battery cell 35; A signal processing block 392 processing the charge amount information and the data information for the unique ID to be sent to the contactless power transmitter 10 sent by the control of the device controller 390; The data information on the unique ID is stored, the charge amount information data transmitted from the protection circuit block 37, the charging circuit block 36 and the data on the charging state are temporarily stored, and transmitted from the contactless power transmitter 10. A device memory unit 391 in which data to be stored is stored; And a device controller 390, wherein the contactless power receiver is capable of multi-contact power charging. 3. The method of claim 2, The contactless power transmission apparatus 10 is a contactless charging case in which a full bridge resonant converter 22 and a central control unit 21 are embedded to transmit a power signal to the contactless power receiver 30 in a contactless manner. (11) is external, The contactless charging case 11 is provided with a contactless charging table 12 on the upper surface, The contactless charging table 12 is formed with a plurality of charging blocks 14 is provided with a primary charging core 13, The full bridge resonant converter 22 is provided in plural to be connected to each of the plurality of charging blocks 14, The multi-gate driver module 23 is provided to transmit the individually converted power signal to the plurality of full bridge resonant converter 22 by the control of the central control unit 21, It is connected to a plurality of the charging block 14 is characterized in that the receiving signal processing module 24 for processing the signal transmitted from the contactless power receiving device 30 to transmit to the central control unit 21, characterized in that it is provided Contactless power receiver capable of multi-contact power charging. The method of claim 3, wherein The contactless charging case 11 is provided with a power on / off switch 151 and an input panel 152 for signal input on the front surface of the contactless charging table 12 and the plurality of charging blocks 14. And an LCD panel 153 and a charging state LED 154 displaying the state of charge of the contactless power receiving device 30, wherein the power supply unit 25 is inherently provided. Contactless power receiver that can be charged. The method of claim 3, wherein The main controller 210 of the contactless power transmission device 10 is provided to control to transmit a unique code signal for the individual charging block 14 together with the charging power signal to the charging block for charging operation. The device controller 390 is provided to analyze the unique code signal for the charging block 14 transmitted from the contactless power transmission device 10, The device memory unit 391 is configured to store the data value of the unique code signal for the charging block 14 transmitted from the device controller 390, it is possible to multi-contact power charging possible contactless power Receiver. 3. The method of claim 2, The device controller 390, It characterized in that it is provided to control the data value for the voltage value of the power signal received for the request signal received from the contactless power transmission device 10 to be transmitted to the contactless power transmission device 10 side. Contactless power receiver capable of charging contact power.

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