KR20120110558A - System for contactless charge - Google Patents

Abstract

PURPOSE: A contactless charging system is provided to simultaneously perform wireless data communications and wireless charging between a primary side device and a secondary side device by transmitting a contactless power source. CONSTITUTION: A contactless charging system comprises a primary side device(100) and a secondary side device(300). The primary side device comprises a power supply part(110), a power control circuit part(120), a first center processing part(130), a switching part(140), and a switching drive circuit part(150). The primary side device comprises a first communication control part(160), a first data coupling part(170), a first interface part(180), a first output control part(195), a first communication part(190), and a primary side coil part(200). The secondary side device comprises a secondary side coil part(400), a battery(310), a first conversion part(320), a second conversion part(330), and a second central processing part(340). The secondary side device comprises an ID drive circuit part(350), a second communication control part(360), a second data coupling part(370), a second interface part(380), a second output control part(395), and a second communication part(390). [Reference numerals] (110) Power supply part; (120) Power control circuit part; (130) First center processing part; (140) Switching part; (150) Switching drive circuit part; (160) First communication control part; (170) First data coupling part; (180) First interface part; (190) First communication part; (195) First output control part; (310) Battery part; (320) First conversion part; (321) AC/DC converter; (325) DC/AC converter; (330) Second conversion part; (340) Second central processing part; (350) ID drive circuit part; (360) Second communication control part; (370) Second data coupling part; (380) Second interface part; (390) Second communication part; (395) Second output control part

Description

Contactless Charge System {System for Contactless Charge}

The present invention relates to a contactless charging system.

The Battery Pack is used in combination with a portable terminal to supply power to various portable terminals such as mobile phones, PDAs (Personal Digital Assistants), MP3 players, DMB (Digital Multimedia Broadcasting) terminals, and PMP (Portable Music Player). do.

When the user of the portable terminal falls below a predetermined level, the user of the portable terminal charges the battery pack using a charger and uses the battery pack again. At this time, most battery packs are provided with externally exposed connection terminals so as to be electrically connected to the charging terminals provided in the charger, so that the user maintains electrical connection by connecting the charging terminals of the charger and the connection terminals of the battery pack to each other. Charge in one state.

However, since the charging terminal of the charger and the connection terminal of the battery pack are exposed to the outside, they may be easily contaminated by foreign substances, and wear occurs in the process of contacting or separating the charger and the battery pack, and if there is moisture, the connection may be corroded. Not only that, there was a problem in that the life and performance of the battery pack is deteriorated when moisture penetrates inside the battery pack. In order to solve this problem of the terminal supply method, research on contactless charging has been actively conducted.

The problem to be solved by the present invention is to provide a contactless charging system capable of data communication or contactless charging.

According to one aspect of the invention, a contactless charging system is provided.

A contactless charging system capable of data communication or contactless charging is disposed corresponding to a primary side device and a primary side device for transmitting and receiving an AC power by an electromagnetic induction method, and modulating and inserting a data signal into the AC power source. And a secondary side device for transmitting and receiving data signals modulated by the AC power and AC power.

According to an embodiment of the present invention, the primary side device may include a power supply unit for providing power to be transmitted to the secondary side device, a power control circuit unit for checking an ID of the secondary side device, and monitoring power supplied from the power supply unit, and a power control circuit unit. A first central processing unit controlling the control unit, a switching unit switching power to be transmitted to the secondary side device, a switching driving circuit unit outputting a control signal for a switching operation of the switching unit under control of the first central processing unit, and an AC power supply for high speed communication. A first communication control unit for encoding or decoding an inserted and transmitted data signal, a first data coupling unit connected to a primary coil unit for transmitting and receiving a data signal, and a power source of an electromagnetic induction method to prevent interference of contactless charging and data communication A first output adjuster for adjusting the frequency of the modulated data signal differently from the frequency for transmission And a primary side coil unit configured to transmit or receive an AC power source and a data signal inserted into the AC source.

According to an embodiment of the present invention, the primary side coil unit corresponds to the secondary side device and the first coil unit for transmitting and receiving the AC power in an electromagnetic induction method and a data signal modulated into an AC waveform and inserted into the AC power source to the secondary side device. It may include a second coil unit for transmitting and receiving.

According to an embodiment of the present disclosure, the primary side device may further include a first interface unit for standardizing a signal generated by the first communication controller to a signal of a preset communication network and a first communication unit connected to the communication network to perform communication. Can be.

According to an embodiment of the present disclosure, the secondary side device may include a first converter converting power transmitted from the primary device into a primary, a second converter converting power converted by the first converter into secondary, and a second converter. A battery storing the converted power in the conversion unit, a second central processing unit which checks the converted power in the second conversion unit and generates ID data to be transmitted to the primary device, and ID data as ID data under the control of the second central processing unit. ID driving circuit unit for generating a signal, a second communication control unit for encoding or decoding a data signal inserted and transmitted to an AC power source, a first data coupling unit connected to a secondary coil unit for transmitting and receiving data signals, contactless charging and data A second output adjuster and an AC power supply for adjusting a frequency of a data signal that is modulated differently from a frequency for electromagnetic induction power transmission to prevent interference of communication; Accessories may include a secondary coil for transmitting or receiving a data signal inserted in the power supply to the primary device.

According to an embodiment of the present invention, the secondary side coil unit corresponds to the primary side device and the third coil unit for transmitting and receiving the AC power in an electromagnetic induction manner and a data signal modulated into an AC waveform and inserted into the AC power source to the primary side device. It may include a fourth coil unit for transmitting and receiving.

According to an embodiment of the present disclosure, the secondary side device may further include a second interface unit for standardizing a signal generated by the second communication controller into a signal of a predetermined communication network and a second communication unit connected to the communication network to perform communication. Can be.

The contactless charging system according to the present invention can simultaneously perform wireless data communication and wireless charging between the primary side device and the secondary side device by contactless power transmission using induction electromotive force.

In addition, the contactless charging system according to the present invention can recognize the charging target by recognizing the ID of the secondary device.

1 is a view showing a contactless charging system according to an embodiment of the present invention.
2 is a view for explaining the principle of data communication between the primary side device and the secondary side device shown in FIG.
3 to 11 are diagrams showing a circuit embodiment of each part constituting the primary side device shown in FIG.
12 to 16 are diagrams illustrating a circuit embodiment of each part of the secondary side apparatus illustrated in FIG. 1.

The present invention may be variously modified and have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Hereinafter, a contactless charging system according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a contactless charging system according to an embodiment of the present invention.

Referring to FIG. 1, a contactless charging system according to an embodiment of the present invention includes a primary side device 100 and a secondary side device 300.

The primary apparatus 100 may include a power supply unit 110, a power control circuit unit 120, a first central processing unit 130, a switching unit 140, a switching driving circuit unit 150, a first communication control unit 160, and a first unit. The first data coupling unit 170, the first interface unit 180, the first output adjusting unit 195, the first communication unit 190, and the primary side coil unit 200 are included.

The power supply unit 110 provides DC power to the power control circuit unit 120. For example, the power supply 110 includes a switching mode power supply (SMPS) capable of supplying input power having a frequency of 60 Hz and having an output of about 12 V and about 30 W. Here, the power supply unit 110 receives power from an external device and provides DC power to the power control circuit unit 120. The power supplied to the power supply 110 may be a power input from a USB port of a computer, an AC adapter, a cigar jack, or the like. For example, the power supply 110 may be supplied with power of 220V and 60Hz.

The power supply control circuit unit 120 checks the ID of the secondary side device 300. To this end, the power control circuit unit 120 reconfirms and confirms ID data input from the secondary device 300. In addition, the power control circuit unit 120 monitors the power supplied from the power supply unit 110. Here, the power control circuit unit 120 monitors whether the voltage of the power supplied from the power supply unit 110 is provided at a preset level under the control of the first central processing unit 130.

The first central processing unit 130 controls the power control circuit unit 120, the switching unit 140, or the switching driving circuit unit 150. For example, the first central processor 130 controls the ID decoding function and the power monitoring function of the power control circuit 120. In addition, the first central processing unit 130 forms a switching frequency for the switching function of the switching unit 140. In addition, the first central processor 130 controls the turn on / off of the switching unit 140.

The switching unit 140 is turned on / off under the control of the first central processing unit 130 to perform a switching operation. The switching unit 140 provides the power supplied from the power control circuit unit 120 to the primary coil unit 200. In order to perform such a function, the switching unit 140 includes a switching device such as a FET and a BJT.

The switching driving circuit unit 150 generates a switching driving signal under the control of the first central processing unit 130. The switching driving circuit unit 150 provides the generated switching driving signal to the switching unit 140.

The first communication controller 160 encodes or decodes an AC coupled signal for high speed communication. To this end, the first communication control unit 160 may include a CPU AV chipset.

The first data coupling unit 170 transmits a data signal provided from the first communication control unit 160 to the primary coil unit 200 to wirelessly transfer data to the charging unit.

The first interface unit 180 standardizes the signal generated by the first communication control unit 160 into a signal suitable for a communication network using a MAC or PHY layer. Here, the first interface unit 180 supports the IEEE 802.3u standard. Here, the first interface unit 180 may use the AC coupling signal as general Internet data through the PHY chip.

The first output adjuster 195 makes the frequency of the data communication signal different from the frequency of the wireless charging so that the high speed data communication is not affected during charging of the secondary device 300. In addition, the first output adjuster 195 filters out a frequency within about 2 to 30 MHz. To this end, the first output adjuster 195 may include a band pass filter circuit.

The first communication unit 190 is connected to a communication network for data communication with an external device. For example, the first communication unit 190 may include an RJ45 connector for using the Internet.

The primary coil unit 200 includes a first coil unit 210 connected to the switching unit 140 and a second coil unit 220 connected to the first data coupling unit 170.

The first coil unit 210 may be configured by winding a wire or may be configured by printing a pattern on a flexible substrate. Here, the first coil unit 210 is formed to a preset diameter. The first coil unit 210 receives an AC power for generating induced electromotive force from the switching unit 140. Here, the first coil unit 210 induces AC power to the secondary coil unit 400 of the secondary device 300 using the frequency of the supplied AC power. This will be described together with the secondary coil unit 400 below.

The second coil unit 220 may be configured by winding a wire or printing a pattern on a flexible substrate. The second coil unit 220 is disposed inside the first coil unit 210. That is, the second coil unit 220 is formed to a smaller diameter than the first coil unit 210. The second coil unit 220 modulates the frequency of the data signal supplied from the first data coupling unit 170. For example, the second coil unit 220 modulates the data signal in a frequency shift keying (FSK) manner.

The secondary side device 300 includes a secondary side coil unit 400, a battery 310, a first conversion unit 320, a second conversion unit 330, a second central processing unit 340, and an ID driving circuit unit 350. , A second communication controller 360, a second data coupling unit 370, a second interface unit 380, a second output adjustment unit 395, and a second communication unit 390.

The secondary coil unit 400 includes a third coil unit 410 and a fourth coil unit 420.

The third coil unit 410 is disposed to face the first coil unit 210. Here, the third coil unit 410 is formed to a diameter set to correspond to the first coil unit 210. The third coil unit 410 receives AC power from the first coil unit 210 through an electromagnetic induction method. Herein, the electromagnetic induction method refers to a contactless power transmission method in which induction electromotive force is generated in a magnetic field between the first coil unit 210 and the third coil unit 410 disposed to face each other, thereby transmitting power. At this time, the third coil unit 410 receives the AC power carrying the data signal transmitted from the second coil unit 220. This will be described with reference to FIG. 2 further.

2 is a view for explaining the principle of data communication between the primary side device and the secondary side device shown in FIG.

2, the AC power supply and the data signal have different frequencies. For example, if the AC power supply has a frequency of about 20 KHz, the data signal has a frequency of about 2 MHz to about 28 MHz. The AC power and data signals are synthesized and transmitted to a waveform in which a modulation signal is applied to a power line between the first coil unit 210 and the third coil unit 410.

Referring back to FIG. 1, the fourth coil unit 420 is disposed to face the second coil unit 220. Here, the fourth coil unit 420 is formed to have a diameter set to correspond to the first coil unit 210. In addition, the fourth coil unit 420 receives a data signal loaded on AC power received by the third coil unit 410. In addition, the fourth coil unit 420 may modulate data to be transmitted from the secondary device 300 to the primary device 100 into an AC waveform and then transmit the data to the second coil unit 220 through a magnetic field.

Since the second coil unit 220 and the fourth coil unit 420 do not directly transmit data signals between the two coil units 220 and the fourth coil unit 420, there is no contact between the first coil unit 210 and the third coil unit 410. Send and receive data using charging.

In the present invention, the data signal modulated by the third coil unit 410 is transmitted to the fourth coil unit 420 through a magnetic field formed between the first coil unit 210 and the second coil unit 220 to be contactless charged. And data communication can be performed together.

The battery 310 stores power for driving the secondary side device 300. To this end, the battery 310 stores the power supplied from the primary device 100.

The first converter 320 converts AC power supplied from the third coil unit 410 into DC power. The first converter 320 includes an AC / DC converter 321 and a DC / AC converter 325. Here, the AC / DC converter 321 converts AC power supplied from the third coil unit 410 into DC power. The AC / DC converter 321 makes it possible to use the power supplied wirelessly from the primary device 100 as the power of the secondary device 300. In addition, the DC / AC converter 325 converts the ID data signal received from the ID driver circuit unit 350 into an AC signal.

The second converter 330 converts the DC power converted by the first converter 320 back to secondary or adjusts the output. The DC power converted to the primary in the first converter 320 cannot be used directly due to high voltage. Accordingly, the second converter 330 converts the DC power converted into the primary to the voltage that can be used in the secondary side device 300 or adjusts the output. For example, the second converter 330 converts the primary-converted DC power to be used in the secondary side device 300 that can be used up to 6A.

The second converter 330 has a wide input voltage range of about 5.5V to 36V. In addition, the second converter 330 has a high efficiency conversion efficiency of about 90%. In addition, the second converter 330 stably outputs a power of about 5A. In addition, the second converter 330 can be adjusted to 1.22V with an initial accuracy of about 1.5%, thereby having a wide output voltage range. In addition, the second converter 330 may adjust a frequency of about 500KHz for a small filter size. In addition, the second converter 330 may minimize external components. In addition, the second converter 330 outputs a shut down supply current of about 18 mA. In addition, the second converter 330 has a fast response characteristic. This second converter 330 has a scheme protected by excess current limiting, overvoltage protection and thermal shutdown. In addition, the second converter 330 has a small size of the heat generating pad structure. In this case, the second conversion unit 330 may be operated in a temperature range of about -40 ~ 125 ℃.

The second central processor 340 checks the voltage converted by the second converter 330. In addition, the second central processing unit 340 generates ID data. The second central processor 340 controls the turn on / off.

The ID driving circuit 350 outputs the ID data signal in a load current manner to transmit the ID data generated by the second central processing unit 340 to the primary apparatus 100. At this time, the ID driving circuit unit 350 outputs an ID data signal to the first conversion unit 320.

The second communication controller 360 encodes or decodes an AC coupled signal for high speed communication. To this end, the second communication control unit 360 may include a CPU AV Chipset.

The second data coupling unit 370 transmits the data signal provided from the second communication control unit 360 to the secondary coil unit 400 to wirelessly transmit data to the charging part.

The second interface unit 380 normalizes the signal generated by the second communication controller 360 to a signal suitable for a communication network using a MAC or PHY layer. Here, the second interface unit 380 supports the IEEE 802.3u standard. Here, the second interface unit 380 allows the AC coupling signal to be used as general Internet data through the PHY chip.

The second output adjuster 395 makes the frequency of the data communication signal different from the frequency according to the wireless charging so that the high speed data communication is not affected during the charging of the secondary side device 300. In addition, the second output adjuster 395 filters out frequencies within a range of about 2 MHz to about 30 MHz. To this end, the second output adjuster 395 may include a band pass filter circuit.

The second communication unit 390 is connected to a communication network for data communication. For example, the second communication unit 390 may include an RJ45 connector for using the Internet.

3 to 11 are diagrams showing a circuit embodiment of each part constituting the primary side device shown in FIG. Here, the circuit of FIGS. 3 to 11 will be described with reference to the components of FIG. 1.

The power control circuit unit 120 may be configured with the circuit shown in FIG. 3. Here, the power supply control circuit unit 120 divides the ID data signal transmitted through the AC waveform into a high signal and a low signal to form an ID data signal.

The first central processing unit 130 may be configured with the circuit shown in FIG. 4. Here, the first central processor 130 may be configured with a circuit for performing functions such as ID decoding, charging frequency adjustment, current monitoring, turn-on / turn-off control, and UART communication.

In addition, as shown in FIG. 5, the first central processing unit 130 may include a circuit for changing a current being output to a voltage in order to monitor a power provided to the secondary side device 300.

The switching unit 140 and the switching driving circuit unit 150 may be configured with the circuit shown in FIG. 6. The switching unit 140 converts the DC output power of about 12V and about 30W into an AC power and outputs the AC power.

In addition, the switching unit 140 and the switching driving circuit unit 150 may include a circuit including a fuse at an input portion and preventing a reverse voltage, as shown in FIG. 7.

Here, the primary apparatus 100 supplies power to the first communication control unit 160, the first data coupling unit 170, the first interface unit 180, the first output adjustment unit 195, or the first communication unit 190. To supply may include the power supply circuit shown in FIG.

The power supply circuit shown in FIG. 8 may use a DC / DC converter circuit for low heat generation.

As illustrated in FIG. 9, the first data coupling unit 170 may include a circuit that transmits a DC signal to an AC signal or a DC signal to a contactless transmission signal.

As illustrated in FIG. 10, the first interface unit 180 may be configured as a circuit that can use signals transmitted and received by the first data coupling unit 170 as general Internet data through the PHY chip.

Meanwhile, as illustrated in FIG. 11, the primary apparatus 100 may further include a circuit for displaying a monitor signal during communication with a display device such as an LED. Here, the circuit which expresses the monitor signal of FIG. 11 represents the communication of an AC signal, the link of a data signal, or a power supply.

12 to 16 are diagrams illustrating a circuit embodiment of each part of the secondary side apparatus illustrated in FIG. 1. The circuit of FIGS. 12 to 16 will be described with reference to the components of FIG. 1.

The AC / DC converter 321 of the first converter 320 may be configured with the circuit shown in FIG. 12. Here, the AC / DC converter 321 converts the power or the signal input by AC into DC.

The second converter 330 may be configured with the circuit shown in FIG. 13. Here, the second converter 330 may change the DC voltage converted into the primary to the actual use voltage or adjust the output.

The second central processor 340 may be configured with the circuit shown in FIG. 14. Here, the second central processing unit 340 checks the voltage whose change or output is adjusted by the second converter 330. In addition, the second central processing unit 340 generates ID data and controls turn-on / turn-off.

In addition, the second central processing unit 340 may further include a circuit for detecting an overvoltage or an overcurrent by a reference voltage value, as shown in FIG. 15.

The ID driver circuit 350 may be configured with the circuit shown in FIG. 16. Here, the ID driving circuit 350 transmits the ID data generated by the second central processing unit 340 to the primary side device 100 in a load current manner.

As described above, the contactless charging system according to the present invention can simultaneously perform wireless data communication and wireless charging between the primary side device and the secondary side device by contactless power transmission using induction electromotive force.

In addition, the contactless charging system according to the present invention can recognize the charging target by recognizing the ID of the secondary device.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (7)

In a contactless charging system capable of data communication or contactless charging,
A primary side device for transmitting and receiving an AC power source by an electromagnetic induction method, and modulating and inserting a data signal into the AC power source;
And a secondary side device disposed corresponding to the primary side device and transmitting and receiving the AC signal and the data signal modulated and inserted into the AC power in the electromagnetic induction manner.
The method according to claim 1,
The primary side device
A power supply unit providing power to be transmitted to the secondary side device;
A power control circuit unit which checks the ID of the secondary device and monitors the power supplied from the power supply unit;
A first central processor controlling the power control circuit;
A switching unit for switching power to be transmitted to the secondary device;
A switching driving circuit unit outputting a control signal for a switching operation of the switching unit according to the control of the first central processing unit;
A first communication control unit which hatches or decodes and decodes the data signal which is inserted into and transmitted to the AC power for high speed communication;
A first data coupling unit connected to the primary coil unit to transmit and receive the data signal;
A first output adjuster configured to adjust a frequency of the modulated data signal differently from a frequency for power transmission of the electromagnetic induction method so as to prevent interference of the contactless charging and the data communication; And
And a primary coil unit configured to transmit or receive the AC power and the data signal inserted into the AC power to the secondary device.
The method of claim 2,
The primary side coil unit
A first coil unit corresponding to the secondary side device to transmit and receive the AC power in the electromagnetic induction manner; And
And a second coil unit configured to transmit and receive the data signal, which is modulated into an AC waveform and inserted into the AC power source, to the secondary side device.
The method of claim 2,
The primary side device
A first interface unit standardizing a signal generated by the first communication controller into a signal of a predetermined communication network; And
And a first communication unit connected to the communication network to perform communication.
The method according to claim 1,
The secondary side device
A first converter converting the power transmitted from the primary side device into a primary;
A second converter converting the power converted by the first converter into secondary;
A battery storing the power converted by the second converter;
A second central processing unit which checks the power converted by the second conversion unit and generates ID data to be transmitted to the primary side device;
An ID driving circuit unit generating an ID data signal from the ID data under the control of the second central processing unit;
A second communication controller which encodes or decodes the data signal which is inserted into the AC power and transmitted and received;
A first data coupling part connected to the secondary coil part to transmit and receive the data signal;
A second output adjuster configured to adjust a frequency of the modulated data signal differently from a frequency for power transmission of the electromagnetic induction type so as to prevent interference of the contactless charging and the data communication; And
And a secondary coil unit configured to transmit or receive the AC power and the data signal inserted into the AC power to the primary device.
6. The method of claim 5,
The secondary coil unit
A third coil unit corresponding to the primary side device for transmitting and receiving the AC power in the electromagnetic induction manner; And
And a fourth coil unit configured to transmit and receive the data signal, which is modulated into an AC waveform and inserted into the AC power source, to the primary side device.
6. The method of claim 5,
The secondary side device
A second interface unit for standardizing a signal generated by the second communication controller into a signal of a predetermined communication network; And
And a second communication unit connected to the communication network to perform communication.

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