KR20100088117A - Non-contact charging system of wireless power transmision - Google Patents

Abstract

The present invention is provided so that an induction magnetic field is transmitted from the primary side core 13 under the control of the central control unit 21 of the contactless power transmission device 10, and is connected to the secondary side core 32 to rectify the induced current. 2 of the contactless power receiver 30 including a rectifier block 33 and a charging circuit block 36 provided to charge the battery cells 35 with power supplied from the rectifier block 33. In the contactless charging system A, which is provided to receive a power signal from an induction magnetic field by the induction magnetic field 32 and charges the power, the contactless power receiver 30 is configured to connect the secondary side core 32 to the power supply. Low voltage monitoring blocks (311, 311 ') for determining whether the voltage of the received power is detected as a low voltage and high voltage monitoring blocks (312) (312') for determining whether the voltage of the received power is detected as a high voltage. Receiving power monitoring unit 31, 31 'including; And a power receiving device controller 39 controlling the rectifier block 33, the charging circuit block 36, and the reception power monitoring units 31 and 31 ′, and controlling ID generation and a charging state signal. Further comprising, the primary side core 13 is provided is wound with a circular hollow core coil, the secondary side core 32 is provided with a winding of a hollow core coil of the rectangular shape is coupled to the primary side core 13 The diameter size of the primary side core 13 and the length of one side of the secondary side core 32 is characterized in that the size ratio of 3: 2.

Description

Contactless Charging System {NON-CONTACT CHARGING SYSTEM OF WIRELESS POWER TRANSMISION}

The present invention relates to a contactless charging system, and more particularly, the power transmission is stopped when foreign matter is placed on the charging plate, touched or moved during charging, the contactless power receiver on the charging plate of the contactless power transmission device Even if moved, the charging operation is continuously charged to a stable voltage to improve the charging efficiency, and relates to a non-contact charging system that the primary and secondary side cores are provided with good efficiency.

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.

Furthermore, when the metal is placed on the magnetic field generated from the primary coil, there is a problem such that the contactless charger may be damaged due to a considerable power loss in the primary coil 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.

The present invention for solving the above problems has the advantage that the power transmission is stopped when foreign matter is placed on the charging plate so that the contactless power receiver and the contactless power transmitter are not damaged.

In addition, even if the contactless power receiver is moved or moved on the charging plate of the contactless power transmitter during the charging, the charging operation is to be continuously charged to a stable voltage to improve the charging efficiency.

In addition, the primary side core and the secondary side core are provided with a circular core core and a square perforated core core or a Litz wire to have an object of improving power transmission and reception efficiency.

Furthermore, there is an object to ensure that the battery cells to be charged are protected from the magnetic field generated by the primary side core and the secondary side core to be stably charged.

Contactless charging system according to the present invention for achieving the above object, is provided so that the induction magnetic field is transmitted from the primary side core 13 under the control of the central control unit 21 of the contactless power transmission apparatus 10 and Rectifier block 33 (rectifier block) connected to the secondary side core 32 to rectify the induced current and the charging circuit block block is provided so that the power supplied from the rectifier block 33 is charged in the battery cell 35 ( In the contactless charging system (A) provided to receive the power signal by the induction magnetic field from the secondary side core 32 of the contactless power receiving device 30 comprising a), the contactless power The receiving device 30 detects the low voltage monitoring blocks 311 and 311 ′ which compare and determine whether the voltage of the power received through the secondary side core 32 is detected as a low voltage, and the voltage of the received power as the high voltage. High voltage monitoring to compare Luck 312, 312 'received power monitor block 31 including the (31'); And a power receiving device controller 39 controlling the rectifier block 33, the charging circuit block 36, and the reception power monitoring units 31 and 31 ′, and controlling ID generation and a charging state signal. Further comprising, the primary side core 13 is provided is wound with a circular hollow core coil, the secondary side core 32 is provided with a winding of a hollow core coil of the rectangular shape is coupled to the primary side core 13 The diameter size of the primary side core 13 and the length of one side of the secondary side core 32 is characterized in that the size ratio of 3: 2.

In addition, the contactless charging system according to the present invention is provided so that an induction magnetic field is transmitted from the primary side core 13 by the control of the central control unit 21 of the contactless power transmission apparatus 10, the secondary side core 32 And a rectifier block 33 (rectifier block) for rectifying the induced current and a charging circuit part block 36 provided to supply the power supplied from the rectifier block 33 to the battery cell 35. In the contactless charging system A, which is configured to receive a power signal by an induction magnetic field from the secondary side core 32 of the contact power receiver 30 so as to charge the power, the secondary core 32 receives the secondary signal through the secondary side core 32. A low voltage monitoring block (311) (311 ') for determining whether a voltage of the power to be detected is detected as a low voltage, and a high voltage monitoring block (312) (312') for comparing and discriminating whether a voltage of the received power is detected as a high voltage. Receiving power monitoring units 31 and 31 '; And a power receiving device controller 39 controlling the rectifier block 33, the charging circuit block 36, and the reception power monitoring units 31 and 31 ′, and controlling ID generation and a charging state signal. Further comprising, the primary side core 13 is provided with a ritz wire formed by twisting a plurality of thin coils, the secondary side core 32 is a plurality of thin coils formed in parallel with each other without twisting It is characterized by being provided with.

Furthermore, the power receiver device control unit 39 of the contactless power receiver 30 receives a determination signal for the voltage of the received power transmitted from the reception power monitoring units 31 and 31 ′, and receives the signal at a low voltage. When it is provided to the request signal for the boost to the contactless power transmission device 10 side, the central control unit 21 of the contactless power transmission device 10 is the step-up request from the contactless power reception device 30 In response to the signal, the control driver for the boost is sent to the gate driver module 23 side, the induction magnetic field according to the boost in the resonant converter 22 and the primary side core 13 is connected to the gate driver module 23 It may be provided to occur.

In addition, the filter unit block (34) connected to the rectifier block 33 for filtering power; It is provided between the charging circuit unit block 36 and the battery cell 35 detects a current charged in the battery cell 35 and transfers the charging state information of the battery cell 35 to the power receiver device control unit 39. A protection circuit module block 37 for transmitting and detecting an overvoltage, an undervoltage, an overcurrent, a short circuit, and the like of the battery; And a constant voltage regulator block 38 provided to supply power to the power receiver control unit 39.

The present invention provided as described above has the effect that the power transmission is stopped when foreign matter is placed on the charging plate so that the contactless power receiver and the contactless power transmitter are not damaged.

In addition, even if the contactless power receiver is moved or moved on the charging plate of the contactless power transmitter during charging, the charging operation is continuously charged to a stable voltage, thereby improving the charging efficiency.

In addition, the primary side core and the secondary side core are provided with a circular core core and a square perforated core core or a Litz wire, which has the advantage of good power transmission and reception efficiency.

Furthermore, there is an effect that the battery cell to be charged is protected from the magnetic field generated by the primary side core and the secondary side core to be stably charged.

1 is a block diagram of a contactless power transmission apparatus of a contactless charging system according to the present invention.
2 is a block diagram of a contactless power receiver of a contactless charging system according to the present invention.
Figure 3 is a flow chart for a contactless power transmission method of a contactless charging system according to the present invention.
Figure 4 is a flow chart for a contactless power receiving method of a contactless charging system according to the present invention.
Figure 5 is a control sequence block diagram for a contactless power transmission method of a contactless charging system according to the present invention.
Figure 6 is a control sequence block diagram for a contactless power receiving method of a contactless charging system according to the present invention.
7 and 8 is a block diagram of a contactless power receiving device of a contactless charging system according to the present invention.
Figure 9 is a side cross-sectional view of the structure of a contactless power receiver according to the present invention.
10 and 11 are exemplary views for the operation of the contactless charging system according to the present invention.
12 and 13 is a schematic illustration of the core of the contactless charging system according to the present invention.
14 is a magnetic field distribution diagram transmitted from the contactless power transmission apparatus according to the present invention.

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

1 is a block diagram of a contactless power transmission apparatus of a contactless charging system according to the present invention, Figure 2 is a block diagram of a contactless power receiving apparatus of a contactless charging system according to the present invention, Figure 3 4 is a flowchart illustrating a contactless power transmission method of a contactless charging system according to the present invention, FIG. 4 is a flowchart of a contactless power receiving method of a contactless charging system according to the present invention, and FIG. 5 is a contactless point of the contactless charging system according to the present invention. 6 is a control sequence block diagram of a power transmission method, and FIG. 6 is a control sequence block diagram of a contactless power reception method of a contactless charging system according to the present invention. 9 is a side cross-sectional view of a structure of a contactless power receiver according to the present invention, and FIGS. 10 and 11 are exemplary views illustrating an operation of a contactless charging system according to the present invention. 12 and 13 are seen A schematic illustration of the core of a contactless charging system according to the invention, and Figure 14 is a magnetic field distribution diagram transmitted from the contactless power transmission apparatus according to the present invention, respectively.

That is, the contactless charging system A according to the present invention is guided by the primary side core 13 under the control of the central controller 21 of the contactless power transmission apparatus 10 as shown in FIGS. 1 to 14. It relates to a contactless charging system (A) is provided so that the magnetic field is transmitted, the power is charged by receiving the power signal by the induction magnetic field in the secondary side core 32 of the contactless power receiver 30.

As shown in FIG. 1, the contactless power transmitter 10 includes a resonance converter 22 and a central controller 21 for transmitting a power signal in a contactless manner to the contactless power receiver 30. Will be.

Thus, the gate driver module 23 is provided to transmit the oscillation signal for transmitting the power signal to the resonant converter 22 under the control of the central controller 21, and the contactless power receiver 30 is also provided. The reception signal processing module 24 for processing a signal transmitted from the transmission to the central control unit 21 is provided.

In addition, the contactless charging case (not shown) is provided with a power on / off switch and an input panel for signal input on the front surface of the contactless charging case and displays the state of charge of the contactless charging plate and the contactless power receiver 30. The LCD panel 153 and the state of charge LED 154 is provided, and the power supply unit 25 is provided therein.

Thus, as shown in the example of Figure 1, the charging plate of the contactless power transmission device is a portable battery such as a mobile phone, PDA, PMP, DMB terminal, MP3, UMPC or notebook, or a battery pack that can be attached to the portable device (that is attached to each charge The contactless power receiving device 30, which may be provided as a semi-inner pack, may be placed, and the contactless power transmission device 30 may be placed thereon. The device 10 detects this and performs charging operation.

In addition, referring to the configuration of the central control unit 21 for controlling the charging operation in the contactless power transmission apparatus 10, as shown in FIG. 1, the power supply of the contactless power transmission apparatus 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, and a gate driver module 23 connected to the primary side; The contactless power is connected to the gate output signal processing block 213 for transmitting a control signal for the power signal transmitted from the core 13 and the reception signal processing module 24 connected to one side of the primary core 13. A reception signal processing block 214 for processing a signal transmitted from the reception device 30, and the power supply block 211, the signal output block 212, the gate output signal processing block 213, and the reception signal Contactless power transmission device including processing block 214 and the like Main controller 210 for controlling the members of the (10) is included is provided.

The power supply of the power supply unit 25 may be supplied with power input from a USB port of a computer, an AC adapter, a Cigar Jack, or the like.

In addition, the charging process is provided with a temperature detector 26 for detecting the temperature of the contactless power transmission apparatus 10, when the overheating according to the temperature detected by the temperature detector 26 may stop the charging operation, no If the contact power transmission apparatus 10 is overheated as a whole, the operation of the entire system may be configured to be suspended.

Furthermore, the power supply unit 25, the gate driver module 23, the resonant converter 22 or the reception signal processing module 24 may be provided with a current sensing member to monitor the flow of current, respectively, such a current The sensing member may be configured to stop the charging operation or to stop the operation of the system when the members are in an overcurrent or overvoltage state, and transmit a signal therefor.

The main configuration of the contactless power receiver 30 that receives the power signal from the contactless power transmitter 10 corresponds to the primary side core 13 of the contactless power transmitter 10 as shown in FIG. 2. A secondary side core 32 to generate an induced current; A rectifier block 33 connected to the secondary side core 32 to rectify an induced current; A charging circuit block block 36 (Charger IC block) provided so that the power supplied from the rectifier block 33 is charged in the battery cell 35; And control the members of the contactless power receiver 30 such as the rectifier block 33, the filter block 34, the charging circuit block 36, the protection circuit block 37, the constant voltage regulator block 38, and the like. The power receiver controller 39 (Power receiver controller) is provided to monitor the ID generation and the state of charge.

In addition, the filter unit block (34) connected to the rectifier block (33) to filter the power (Smoothing Filter block); It is provided between the charging circuit unit block 36 and the battery cell 35 detects a current charged in the battery cell 35 and transfers the charging state information of the battery cell 35 to the power receiver device control unit 39. A protection circuit module block 37 for transmitting and detecting an overvoltage, an undervoltage, an overcurrent, a short circuit, and the like of the battery; A constant voltage regulator block 38 or the like may be further provided to supply power to the power receiver control unit 39.

In addition, the contactless power receiving device 30 may be provided with a receiving power monitoring unit 31, 31 'for monitoring the power received through the secondary side core (32). Thus, by determining the degree of the voltage of the received power to determine whether the reception is stable. The reference voltage of the received power can be variously selected according to the options of the contactless charging system (A) and the contactless power receiver 30, can be generally set to about 2 ~ 20V, in particular general When applied to a portable device can be set to approximately 5V.

The detailed configuration of the reception power monitoring unit 31 and 31 ′ includes a low voltage monitoring block 311 and 311 ′ which compares and determines whether a voltage of the received power is detected as a low voltage, and a voltage of the received power as a high voltage. A high voltage monitoring block 312 and 312 ′ may be included to determine whether the signal is detected.

In the low voltage monitoring blocks 311 and 311 ′, the degree of the reference voltage of the low voltage may be selectively set according to the detailed configuration of the contactless charging system A or the contactless power receiver 30. In the case where 5V is taken as an example of the reference voltage, the value of -1.5V to -0.5V may be generally set as a reduced value.

Similarly, when the degree of the voltage that is the reference of the high voltage in the high voltage monitoring blocks 312 and 312 'can be selectively set according to the detailed configuration of the contactless charging system A or the contactless power receiver 30, or the like. In the case where the previous example uses 5V for the reference voltage, it may be set to approximately + 1.5V to + 0.5V.

In addition, the power receiving device control unit 39 is connected to the filter block 34 to process the power signal for processing the transmission signal for the data information of the power signal transmitted and received from the contactless power transmission apparatus 10. Block 393; A charging signal processing block 394 connected to the charging circuit unit block 36 and the protection circuit unit 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; Data information for the unique ID is stored, the charge information block data 37, the charge amount information data transmitted from the charging circuit block block 36 and the data on the charging state is stored, and transmitted from the contactless power transmission device 10 A device memory unit 391 in which data is stored; And a device controller 390 is included.

7 illustrates that the configuration for monitoring the voltage of the power transmitted from the contactless power transmission device 10 is configured as the reception power monitoring unit 31 which is a separate module from the power reception device control unit 39. have.

However, the power receiving device control unit 39 may be configured as a separate module as described above, and as shown in FIG. 8, the reception power monitoring block 31 ′ is integrated with the power receiving device control unit 39 to control a single module. It may be configured as a module. As such, the reception power monitoring block 31 '(low voltage monitoring block 311' and the high voltage monitoring block 312 ') is included in the case where the power receiving device control unit 39 is composed of a single module. The overall size of 30 can be simplified, so that the overall size can be made small. In addition, there is an advantage that the entire circuit configuration is simply configured by simplifying the monitoring line for the received power.

In addition, in the above example, the configuration of monitoring the received power signal based on the upper limit value or the lower limit value of the voltage, but in addition to the voltage monitoring configuration, the current monitoring configuration may be configured together or separately. Of course, in order to ensure the stability of the circuit can be configured to monitor the current together with the voltage, depending on the installation situation may be equipped with only one monitoring circuit of the voltage monitoring circuit or current monitoring circuit. Thus, in the description of the following embodiments, the embodiment is described as an example of using the upper or lower limit of the voltage. However, the present invention is not limited thereto, and the reception power is monitored to be the upper and lower limits for the current to stably receive power. It could be.

The contactless charging system (A) according to the present invention provided as described above is charged so that the voltage is stably received in the contactless power receiver 30 for the power signal transmitted from the contactless power transmitter 10. There is an advantage to optimizing power transfer.

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

First, in the contactless power transmission device 10 of the contactless charging system A, the gate output signal processing block 213-the gate driver module 23-the resonant converter (1) under the control of the central control unit 21. 22) The standby mode step S01 in which the power signal for each cycle is transmitted through the gate signal line 234 serving as the primary side core 13 or the like is performed. As described above, in the standby mode step (S01), the power signal is transmitted through the primary core 13 for each cycle, and the power signal includes a call signal for calling a unique ID value of the contactless power receiver 30. In response to this, it waits to receive a response signal.

Thereafter, during the standby mode step S01, while transmitting the unique ID value call signal and waiting to receive a response signal thereto, an object is detected by receiving a detection signal according to load modulation through the primary side core 13. Any object detected in this way, as well as a portable contactless power receiver 30 capable of contactless charging such as a mobile phone, PDA, PMP, DMB terminal, MP3 player, UMPC or laptop, as well as metallic, non-metallic materials and General electronic devices and the like that are not capable of contactless charging may be close to the charging plate. Therefore, when receiving a signal by the load modulation generated by the foreign matter, such as these objects as a detection signal, the contactless power transmission apparatus 10 first distinguishes whether the object is close to determine the presence or absence of the object.

In this case, such as the non-metal or in the case of the load modulation due to the movement of the object can be switched to the standby mode step (S01) in a case where no special problem occurs. However, this is not the case of the contactless power receiving device 30 capable of contactless charging. In the case of a foreign object such as a metal object or an electronic device that is not capable of contactless charging, heat generation and abnormal operation of the device may occur due to the charging operation. There is a concern.

Therefore, it is provided to include the step of detecting such foreign matter (PMD, Parasitic Metal Detection). That is, for the detection signal according to the load modulation generated by the object, it is determined whether or not the detection signal detected through the corresponding primary side core 13 and the reception signal processing module 24 is not a normal signal. By comparing the received signal according to the load modulation with respect to the signal transmitted by the control of 21) to determine whether or not the signal is not normal signal discrimination. Therefore, when it is detected as a foreign matter, it switches to a foreign matter detection state, and when the detected foreign material is a metal or an electronic device, the foreign material error is displayed on the LCD panel 153 or the state of charge LED 154, and the charging operation is not switched to. Or to stop charging (PMD error, Parasitic Metal Detection error).

However, when the detected received signal is determined as data for the unique ID of the contactless power receiver 30 capable of contactless charging, a unique ID discrimination step (S02) of analyzing and detecting the signal detected by load modulation is performed. To perform. 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 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 receiver device control unit 39, and accordingly unique ID data of the contactless power receiver 30 stored in the device memory unit 391. The value is transmitted to the contactless power transmitter 10 through the signal processing block 392. Therefore, in the unique ID determination step (S02), the received signal received by load modulation is processed by the received signal processing module 24 connected to the primary side core 13 of the contactless power transmission apparatus 10 to receive the received signal processing block. It is transmitted to the main control unit 210 of the central control unit 21 through the (214). 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 normal unique ID data sent from the normal contactless power receiver 30. Determine whether it is a normal device capable of contactless charging.

When it is determined that the unique ID transmitted from the contactless power receiver 30 normally, the full power power transmission step of transmitting the full power transmission power from the primary core 13 through the gate driver module 23 (S03). ).

Looking at the full power power transmission step (S03) process in the contactless power transmission device 10, the normal contactless power receiving device 30 is mounted on the charging plate in the main control unit 210 of the central control unit 21 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 transmission of the power signal is transmitted to the gate driver module 23 and the power signal is transmitted to the primary core 13 through the corresponding resonant converter 22 to generate a contactless power signal due to the induction magnetic field generation. Transmitted to the device 30.

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

The control signal of the main controller 210 is transmitted to the gate driver module 23 through the gate signal line 234, the gate driver 23 is a gate signal conversion unit 232 for processing the gate signal, the processed signal It may be configured to include an output driver 233, a gate control unit 231, and the like for transmitting to the resonant converter (22).

In addition, the gate driver 231 may be configured to control signal transmission and reception and signal processing in the gate driver module 23. Thus, the control signal transmitted from the main control unit 210 is transmitted to the corresponding members, and the power signal is transmitted accordingly, so that the induction magnetic field is stably transmitted.

Thereafter, the charging state information is requested to the contactless power receiver 30 during the charging process, and the charging control step S04 is performed to adjust the charging degree according to the charge information of the contactless power receiver 30 returned.

In the contactless power receiving device 30, the power supply through the rectifier block 33 and the filter block 34 under the control of the device controller 390 after the full power power transmission step (S03) charging circuit block ( 36) and the protection circuit block 37 to charge the battery cell 35.

In response to the charging operation, the device controller 390 receives information about a state of being charged in the battery cell 35 through the charging circuit block 36 and the protection circuit block 37, and thus, the device controller 390 receives the charging state information. It is stored in the unit 391. Further, when the battery cell 35 is in a fully charged state, the charging circuit unit block 36 is controlled to stop the charging operation, and the full charge information signal is transmitted to the secondary side core 32 through the signal processing block 392. It will be provided to occur in. In addition, since power is consumed by the operation of the portable terminal main body, when the voltage in the charged battery cell 35 is lower than a predetermined reference voltage, the charging state may be switched again 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 (S04), 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 includes a reception signal input unit 243 for receiving a signal detected by load modulation, a reception signal processing unit 242 for converting a detection signal according to load modulation, and a reception signal processing module 24. It may be configured to include a reception signal control unit 241 and the like to control the operation of.

Therefore, the transmission information of the contactless power receiver 30 received by load modulation is transmitted to the main control unit 210 through the reception signal processing block 214 after the signal is converted by the reception signal processing module 24. Will be. In the received signal processing module 24, generally, a plurality of amplifiers, LPFs, OR circuits, and the like may be configured.

That is, when a signal according to load modulation is transmitted through the reception signal input unit 243, the reception signal processing unit 242 processes each signal and then sends a signal to the main control unit 210 through the line of the reception signal line 244. Will be sent.

Thus, the contactless power transmission apparatus 10 requests data information on the degree of charging through the gate driver module 23 and the primary side core 13, and the contactless power receiving apparatus 30 that is charged for operation thereof. In FIG. 2, data information on the charge level of the battery cell 35 received through the charging circuit block block 36 and the protection circuit block block 37 is transmitted. The information is transmitted to the main control unit 210 through the primary side core 13 and the reception signal processing module 24.

Also, the power signal received by the contactless power receiver 30 determines the received voltage and transmits a signal for the power signal transmitted to the contactless power receiver 10 when it is lower than or higher than the reference voltage. The voltage of may be provided to be adjusted. That is, during charging in a good state in the contactless power receiver 30 placed in the center of the contactless power transmitter 10 as shown in Figure 10, the contactless power receiver 30 on the charging plate to the outside during charging When moved, the voltage of the received power signal is relatively low. Therefore, in order to compensate for this, a signal for requesting a rising voltage is transmitted to the contactless power transmission apparatus 10 side. In addition, as shown in FIG. 11, when the contactless power receiver 30 located outside on the charging plate of the contactless power transmitter 10 moves to the center portion, the power signal is received in a relatively good state. The voltage of the signal is relatively increased, thereby transmitting a signal requesting the voltage drop to the contactless power transmitter 10 for stable power reception. That is, since the magnetic field distribution in the primary side core 13 of the contactless power transmission device 10 is intensified at the center portion as shown in FIG. 14, the contactless power reception device 30 is connected to the contactless power transmission device 10. When positioned at the center portion of the primary core 13 of), the power signal is well received, while when positioned at the edge, the power signal is received at a weak signal strength. Accordingly, as in the above example, the compensation request signal for power compensation is transmitted to the contactless power transmission apparatus 10 according to the power reception signal state, so that the power is charged with a stable strength in the contactless power reception apparatus 30. There is an advantage that is provided.

Looking at the control method of the charge control step of the embodiment for such a power correction, during the charging operation in the contactless power transmission device 10, requesting the data information on the state of charge information to the contactless power receiving device 30 side To perform the charge amount information request step (S041). Accordingly, the contactless power receiver 30 transmits a signal for charging state information of the charging amount information data and the voltage data for the received power, and thus the voltage of the charge receiving power in the contactless power transmitter 10. The charging information data receiving step S042 for receiving the information is performed.

Then, a power data discrimination step (S043) of analyzing and determining data on the state of charge information of the power signal transmitted from the contactless power receiver 30 is performed, and is transmitted from the contactless power receiver 30. With respect to the voltage data of the power signal, a frequency of the power signal is calculated to compensate for the transmission power, and a compensation power signal transmission step (S044) of transmitting the power signal at the compensated frequency is performed.

Thus, in the example described above, the voltage of the received power signal, which is a reference in the contactless power receiver 30, has been exemplified as 5V. As described above, when the reference voltage is 5V, it is assumed that the contactless power receiver 30 is not moved, and the contactless power receiver 30 is moved and received while being stably received at 5V. When the voltage of the power signal is lowered or increased, the frequency of the power signal transmitted from the contactless power transmitter 10 is changed to compensate for this, and eventually the power signal is supplied at a stable voltage from the contactless power receiver 30. Will receive.

The compensation frequency (Δf) value for the frequency of the power signal transmitted thereto is appropriately set according to the setting states of the contactless charging system A, the contactless power transmitter 10 and the contactless power receiver 30, and the like. It can be. For example, the displacement value of the compensation frequency Δf may be set according to various installation states such as 10 Hz, 50 Hz, 100 Hz, 500 Hz, 1 KHz, 2 KHz, and 5 KHz.

Then, 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. In addition, the state of charge LED 154 is to be distinguished and displayed, but in one example of the lamp LED of the state of charge LED 154, the charging operation is stopped when it is off, the charging is in progress when the light is turned on, the green when fully charged It may be configured to operate according to various lighting methods, such as being configured to turn on a red light when an error such as a foreign material error or a unique ID error.

When the contactless power receiver 30 is moved from the charging plate during the series of charging processes, the efficiency of charging in the contactless power receiver 30 is changed by changing the power signal transmitted from the contactless power transmitter 10. It can be configured to maximize.

After receiving the full charge information 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 charging block 14, the full charge to stop the charging operation The charging operation is stopped by performing the previous state step S06.

In addition, in the foreign material 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 is stopped and the contactless power transmitter 10, the contactless power receiver 30 or To ensure the safety of other metal materials and electronic devices. Therefore, even when the operation is stopped due to the error occurs, it is desirable to be in a standby state until the user receives 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. Even if it is detected that it is resolved, it may be provided to switch to the normal standby mode step.

Furthermore, the device controller 390 of the contactless power receiver 30 receives 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. It may be provided to control to be transmitted to the (10) side.

Looking at the serial process of the charging at the contactless power receiving device 30 side, in the standby mode for receiving the power signal, the contactless power receiving device 30, the primary side of the contactless power transmission device 10 The core 13 detects a call signal calling a unique ID value of the contactless power receiver 30 transmitted with the object detection signal, and detects a signal for the unique ID value of the contactless power receiver 30. A unique ID value signal transmission step (S21) for transmitting to the contactless power transmission apparatus 10 side is performed.

After the unique ID value signal transmitting step (S21), it is switched to the charging standby mode for charging, and received from the contactless power transmission apparatus 10, rectifies the received power signal to the battery cell 35 The charging step (S22) to be charged is performed.

Thereafter, there is a request for the voltage of the power signal received from the contactless charging device 10 or the monitoring module may be configured to monitor the voltage of the power signal received by the control of the device controller 390. . The voltage adjustment request step (S23) determines whether the transmitted power signal is a reference voltage, and sends a voltage adjustment signal for requesting voltage increase if the received power voltage is lower than the reference voltage or for decompression if the received power voltage is lower than the reference voltage. Perform

Thus, when the voltage received after the voltage adjustment request step (S23) is a reference voltage, the normal voltage signal transmission step (S24) for transmitting a signal for normal reception is performed, and the state in which the battery cell 35 is charged It is determined whether it is in a full charge state, and in the case of a full charge state, a charging end step (S25) of terminating charging is performed.

In the voltage adjustment request step (S23), it is possible to determine the degree of the voltage of the received power signal, and may be configured to determine the degree of charge to the battery cell 35.

In the case of determining the voltage of the received power signal, as shown in the example of FIG. 10, when the contactless power receiver 30 moves outward from the center of the charging plate of the contactless power transmitter 10, the relative As it is located outside the primary core 13, the received power is temporarily weakened. In the low voltage monitoring blocks 311 and 311 ′ of the reception power monitoring units 31 and 31 ′, when the normal reception voltage is set to 5 V, the drop is detected as an example of approximately 4.5 V (−0.5 V). Therefore, the signal is transmitted to the contactless power transmission apparatus 10 side to increase the voltage of the outgoing power (Power UP).

In addition, as shown in the example of FIG. 11, when the contactless power receiver 30 is located outside the charging plate of the contactless power transmitter 10 and moves to the center portion, the primary core 13 is relatively moved. Since the contactless power receiving device 30 is located near the center, the power signal is received as a voltage signal which is received at about 5V, which is a stable reception voltage from the outside. Therefore, it is detected that the voltage is boosted as an example of about 5.5V (+ 0.5V), and the signal is transmitted to the contactless power transmission apparatus 10 to lower the voltage of the outgoing power (Power DOWN).

Thus, the contactless power transmission apparatus 10 may be configured to receive and charge the power signal at a more stable voltage by changing the frequency of the power signal transmitted.

That is, as shown in FIGS. 7 and 8, the power signal transmitted by the primary side core 13 of the contactless power transmission apparatus 10 is transmitted through the secondary side core 32 of the contactless power reception apparatus 30. Then, the information on the input voltage strength of the power signal 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 charging IC of the charging circuit block 36 of the contactless power receiver 30 to make the battery active and charges the battery cells 35 with the 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 and the like are determined by the protection circuit block 37 so as to provide stable charging.

During the charging operation of the contactless charging system A including the contactless power transmission device 10 and the contactless power receiving device 30, the charging of the contactless power transmission device 10 as shown in FIG. When the contactless power receiver 30 placed on the plate is moved, the positions of the primary side core 13 and the secondary side core 32 are changed so that the reception ratio of the power signal received by the contactless power receiver 30 is changed. do. Thus, as the distance from the center of the relative core, respectively, the primary side core 13 and the secondary side core 32 is inefficiently positioned, so that the induced electromotive force is less likely to be generated in the contactless power receiver 30.

Therefore, in the contactless 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 becomes lower or higher than the reference value, the power signal is compensated. The request signal for compensation is transmitted to the contactless power transmission apparatus 10 to be transmitted.

For example, assuming that the reference voltage is a voltage of the received power signal is 5V, and the reference deviation value with respect to the received voltage is ± 0.5V, as shown in FIG. ) Is moved and received at a voltage lower than 4.5V, controlled by the device controller 390 of the contactless power receiver control module 39 so as to be boosted by 0.5V and transmitted thereto, and then through the signal processing block 392, A boost request signal is transmitted from the vehicle core 32.

In addition, when the contactless power receiver 30 moves from the outside to the center as shown in FIG. 11 and is received at a voltage higher than 5.5V, the device of the contactless power receiver control module 39 to be transmitted at a voltage of about 0.5V. The controller 390 controls the pressure reduction request signal from the secondary side core 32 via the signal processing block 392.

The contactless power transmission apparatus 10 transmits the compensated power signal for the 0.5V step-up request signal or the decompression 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.

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

That is, when the user touches the contactless power receiver which has already been charged, or the contactless power transmitter 10 is shaken, the positions of the primary core and the secondary core of the contactless power receiver being charged may be changed. There is concern. Thus, since the charging is made to be charged to a stable voltage to the contactless power receiving device that was being charged by the charge power compensation as described above, the charging operation can be continued without a significant problem during the process of full charge of the device.

Furthermore, the contactless power receiver 30 according to the present invention includes the primary side core 13 of the contactless power transmitter 10 and the secondary side core 32 of the contactless power receiver 30 as shown in FIG. 9. A shielding member is provided to protect the contactless power receiver 30 and the battery cell 35 from the magnetic field generated by the magnetic field.

In addition, a primary member core of the contactless power transmission apparatus 10 and a secondary side core of the contactless power receiver 30 may be provided with a shielding member (HPES: Hanrim Postech Electro-magnetic shield).

The shielding member HPES may be provided with a transmission shielding panel 131 (transmission HPES) on the contactless power transmission device 10 side, and received on both sides of the secondary core on the contactless power reception device 30 side. A shielding panel (receiving first shielding panel 322 (receiving 1HPES)) (receiving second shielding panel 323 (receiving 2HPES)) and the like may be provided, and an eddy current reducing member 324 may be provided to reduce the eddy current. .

In addition, the transmission shielding panel 131 or the reception shielding panel 322, 323, etc. may be provided by including 25 to 55 parts by weight of polyurethane with respect to the 55 ~ 75 parts by weight Sendust.

In addition, the eddy current reducing member 324 is formed by plating an eddy current reducing composition on a polyester formed in a mesh shape, and the eddy current reducing composition is made of 35 to 45 parts by weight of zinc with respect to 55 to 65 parts by weight of nickel. It can be.

Sendust (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 described above, the magnetic field induced in the primary core is effectively shielded by the transmission shielding panel 131 formed in the form of a panel, and the magnetic field generated by the secondary core is received by the reception shielding panels 322 and 323. It can be shielded effective.

In addition, since the eddy current may be generated in the contactless power receiver 30, such eddy current may be provided to be extinguished by the eddy current reducing member 324.

In addition, since the eddy current reducing composition made of nickel and zinc is plated on the surface of the polyester, the eddy current reducing member 324 is formed into a metal mesh shape, and thus the eddy current (also known as "meander current") that can be generated by a magnetic field. ) Is reduced by the eddy effect by the mesh of the metal mesh as the eddy current reducing member, so that the circuit of the contactless power receiver 30 is protected. That is, the eddy current is reduced by the mesh mesh of a large number of mesh meshes by the eddy current reducing member, the eddy current due to the magnetic field is reduced as a whole of the battery pack. The eddy current reducing member may be a metal mesh of about 100 mesh to 200 mesh in a metal mesh shape, more preferably, 135 mesh.

Furthermore, in the contactless charging system A according to the present invention, as shown in FIGS. 12 and 13, the primary side core 13 of the contactless power transmission device 10 and the secondary side core of the contactless power reception device 30 ( 32) may be composed of air core coils. In particular, as shown in Figure 12, the primary side core 13 is provided is wound with a circular hollow core coil, the secondary side core 32 is to be provided is wound with a square core core coil.

Therefore, the primary side core 13, which is a circular hollow core coil, and the secondary side core 32, which is a square core core coil, form a couple structure, so that the induced magnetic field transmitted from the primary core 13 of the circular hollow core coil is wider. It is preferably provided to show a stable magnetic field distribution is generated at an angle. The secondary side core 32 corresponding thereto is preferably provided with a hollow core coil having a rectangular shape, and is provided to be directed to the primary side core 13 so that reception is good. Therefore, the reception efficiency may be improved, and the loss may be reduced.

In addition, the diameter size of the primary side core 13 and the length of one side of the secondary side core 32 may be provided in a size ratio of 3: 2. This is to ensure that the primary side core 13 to which the induced magnetic field signal is transmitted is relatively large so that the magnetic field is distributed in a wide range and generated with a stable intensity. In addition, the secondary core may have a relatively small size and may be provided to receive a power signal because the reception is located at a good position among the induced magnetic field distribution areas generated by the primary core 13.

Other embodiments of the primary side core 13 and the secondary side core 32 may be provided with a litz wire including a plurality of thin coils as shown in FIG. 13.

That is, the primary side core 13 and the secondary side core 32 are provided with a litz wire having a plurality of thin coils embedded therein, and the primary side core 13 is a litz wire formed by twisting a plurality of thin coils with each other. It is provided, the secondary side core 32 is a plurality of thin coils are provided with a litzair is formed parallel to each other without twisting.

In particular, the primary side core 13 may be provided such that a plurality of thin coils are twisted in the litz wire, which is a plurality of thin coils, so that the intensity of the induction magnetic field transmitted from the litz wire is stably transmitted. Of course, as in the secondary side core 32, the primary side core 13 may also be provided in parallel with each other without a plurality of thin coils.

On the other hand, the secondary side core 32 may be provided with a ritz wire configured in which a plurality of thin coils are not twisted with each other and arranged in parallel with each other.

This may be in a uniform induction magnetic field region because a plurality of coils parallel to each other form a parallel plane with respect to the magnetic field, and thus a stable induction current may be generated. In addition, such a plurality of thin coils, as shown in the cross-sectional illustration of the right side of FIG. 13, a magnetic field for the current flow may be formed separately, and an eddy current may be generated to interfere with the induced current. Therefore, when the plurality of thin coils are configured in parallel, such eddy currents are canceled with each other, so that the generation of induced currents can be provided in a stable manner.

As described above, although described with reference to a preferred embodiment of the present invention, within the scope not departing from the spirit and scope of the present invention described in the claims by those of ordinary skill in the art In the present invention can be carried out by various modifications or variations.

A: contactless charging system 10: contactless power transmission device
13: primary side core 21: central control unit
22: resonant converter 23: gate driver module
24: receiving signal processing module 25: power supply
30: contactless power receiver 32: secondary core
33: rectifier block 34: filter block
35: battery cell 36: charging circuit block
39: power receiving device control unit

Claims (2)

The rectifier block is provided to transmit an induction magnetic field from the primary side core 13 under the control of the central control unit 21 of the contactless power transmission device 10, and is connected to the secondary side core 32 to rectify the induced current. 33) a secondary side core of the contactless power receiver 30 including a rectifier block and a charging circuit unit block 36 provided to supply the power supplied from the rectifier block 33 to the battery cell 35. In the contactless charging system (A) provided to receive the power signal by the induction magnetic field in 32) to charge the power,
The contactless power receiver 30,
Low voltage monitoring blocks 311 and 311 'for comparing and determining whether a voltage of power received through the secondary side core 32 is detected as a low voltage, and a high voltage monitoring block for comparing and discriminating whether a voltage of the received power is detected as a high voltage. Reception power monitoring units 31 and 31 'including 312 and 312'; And
The rectifier block 33, the charging circuit block 36, the reception power monitoring unit 31 (31 ') and controls the power receiving device control unit 39 is provided to control the ID generation and the charging status signal. Including more,
The primary side core 13 is provided wound with a circular hollow core coil, and the secondary side core 32 is provided wound with a hollow core coil having a rectangular shape to form a coupling structure with the primary side core 13.
A contactless charging system, characterized in that the diameter size of the primary side core (13) and the length of one side of the secondary side core (32) is provided in a size ratio of 3: 2.
The rectifier block is provided to transmit an induction magnetic field from the primary side core 13 under the control of the central control unit 21 of the contactless power transmission device 10, and is connected to the secondary side core 32 to rectify the induced current. 33) a secondary side core of the contactless power receiving device 30 including a rectifier block and a charging circuit block block 36 provided to charge the battery cells 35 with the power supplied from the rectifier block 33. In the contactless charging system (A) provided to receive the power signal by the induction magnetic field in 32) to charge the power,
Low voltage monitoring blocks 311 and 311 ′ for comparing and determining whether the voltage of the power received through the secondary side core 32 is detected as low voltage, and high voltage monitoring block for comparing and discriminating whether the voltage of the received power is detected as high voltage. Reception power monitoring units 31 and 31 'including 312 and 312'; And
The rectifier block 33, the charging circuit block 36, the reception power monitoring unit 31 (31 ') and controls the power receiving device control unit 39 is provided to control the ID generation and the charging status signal. Including more,
The primary side core 13 is provided with a ritz wire formed by twisting a plurality of thin coils,
The secondary side core 32 is a contactless charging system, characterized in that the plurality of thin coils are provided without the twist is formed parallel to each other.

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