JP5476211B2 - Power transmission device, power receiving device, non-contact power transmission and communication system - Google Patents

Description

  The present invention relates to contactless power transmission and communication having a function of transmitting power in a contactless manner by electromagnetic induction from a power supply device having a power transmission device to a portable electronic device having a power receiving device and a function of performing data communication between both devices. The present invention relates to a system, and a power transmission device and a power reception device used in the system.

  In recent years, with the miniaturization of electronic components, portable electronic devices typified by mobile phones and portable music players have been widely spread due to the reduction in size and weight. Generally, charging a secondary battery or a capacitor built in a portable electronic device is performed by bringing the charging terminal of the portable electronic device into contact with the charging terminal installed on the charging stand (cradle) of the charging device. In other words, the secondary battery or the capacitor of the portable electronic device is charged by supplying power from a charging stand.

  However, in the charging method in which the charging terminals are connected in contact with each other, charging may not be possible due to dirt on the charging terminals or intrusion of foreign matter between the charging terminals, so recently contactless power using the principle of electromagnetic induction Many supply systems are used, and the demand for non-contact power transmission devices used therefor is increasing. In a non-contact power transmission device, generally, a power transmission coil of a power transmission device and a power reception coil of a power reception device are arranged in close proximity to each other, and power is transmitted via electromagnetic coupling between the power transmission coil and the power reception coil. It is. Furthermore, a non-contact power transmission and communication system having a function of communicating data such as required power on the power receiving side, power transmission stoppage in case of abnormality, and data such as ID authentication between power transmitting and receiving devices via the transmitting and receiving coils has been developed. Yes. In such a system, when a flat plate coil suitable for small packaging is used as a transmission / reception coil, the displacement between the power transmission coil and the power reception coil affects the power transmission efficiency. Various methods are considered.

  As a measure to prevent positional deviation between the two coils, means for positioning by providing an uneven portion on the power transmission device and power reception device, or means for positioning by magnetism by arranging a magnet at the center of the power transmission coil and power reception coil There is. With these means, the position for power transmission can be grasped easily and reliably, but there is a problem that the power transmission device and the power receiving device are limited in shape, or the efficiency is lowered due to the means. .

  In addition, various methods have been considered for measures that can correct a misalignment. For example, Patent Document 1 discloses means for determining whether or not a power receiving coil has a predetermined positional relationship. FIG. 14 is a plan view showing the overall configuration of an electronic timepiece, which is a portable electronic device using a non-contact power transmission device described in Patent Document 1, and its charging stand, and FIG. 15 is a display unit of the charging stand. A display example is shown. According to this, when the electronic timepiece 401 is disposed in the recess 402 of the charging base 400, the electrical state of the power receiving coil that changes due to the magnetic field generated by the power transmitting coil is detected, and charging is performed according to the positional relationship between both coils and the state of charging. 15A to 15D are disclosed on the display unit 404 of the base 400 so that the user can know the positional deviation of the power receiving coil, that is, the electronic timepiece, and the current charging state. Yes.

  Patent Document 2 discloses a means for displaying the coincidence or mismatch of the center positions of the arranged power transmission / reception coils on a display unit provided in the power reception device or power transmission device. According to this, the detected voltage generated in the power receiving coil by the magnetic field of the power transmitting coil is compared with a predetermined reference voltage, and the state is displayed by the level meter of the display unit, so that the user is notified, and the higher A configuration that enables efficient charging is disclosed.

Japanese Patent No. 3826407 JP 2008-206295 A

  The contactless power transmission devices of the above-described conventional patent documents 1 and 2 have means for displaying whether or not the position of the power transmission / reception coil at that time is exactly the same. Since there is no means for displaying the direction of positional deviation of the transmitting and receiving coils that can be guided to a proper coupling position, it may take time to arrange the power receiving device at the optimum position. In a non-contact power transmission system in which a power transmission coil and a power reception coil are arranged one-on-one, the coil is often arranged at the center of the power transmission device, and an approximate position can be imagined, but a plurality of pairs of transmission / reception coils are arranged. In the case of a multi-contact non-contact power transmission system, it is difficult to estimate the exact position of the transmission coil of the power transmission device, and it is difficult to easily place the power reception device at the optimum position with the conventional means described above. Have difficulty.

  The present invention solves the above-described conventional problems, accurately determines the positional relationship between the power transmission coil and the power reception coil, and has a function of notifying the user of the optimal position by direction indication, etc. It is an object of the present invention to provide a power transmission device, a power reception device, or a non-contact power transmission and communication system using them, which can be accurately and easily matched and can be used for multi-use.

In order to solve the above-described problems, a power transmission device of the present invention includes a power transmission device having a power transmission coil, a power reception coil that is electromagnetically coupled to the power transmission coil, a secondary battery, and a secondary battery that determines the remaining amount of the secondary battery. A power receiving device having a remaining amount determining means, and the power receiving device is disposed at a set position close to the power transmitting device by electromagnetic coupling between the power transmitting coil and the power receiving coil. Non-contact power transmission from the power receiving device to the secondary battery and data transmission between the power transmission device and the power receiving device and power transmission device used in a communication system, the power receiving coil Coil position detecting means for detecting the position of the coil, and the magnitude and direction of the deviation of the power receiving coil from the set position based on the detection result of the coil position detecting means. And having a coil positional relationship determining means for constant, the coil position relationship notifying means for notifying the determination result of the coil position relationship determining means to the power receiving apparatus by said data communication.

  Here, in the power transmission device according to the present invention, the power reception device notifies the power transmission device of the secondary battery remaining amount determination result by the secondary battery remaining amount determination unit through the data communication. A power transmission device for use in a non-contact power transmission and communication system comprising: a secondary battery remaining amount determination result notified from the secondary battery residual amount notification means of the power receiving device; A secondary battery remaining amount reception detecting means for detecting a remaining amount of the secondary battery; and causing a user of the power receiving apparatus to recognize the remaining amount of the secondary battery based on a detection result of the secondary battery remaining amount reception detecting means. You may provide a secondary battery residual amount recognition means.

  Further, the power transmission device of the present invention provides at least one of a relative position of the power receiving coil with respect to the power transmission coil or an arrangement direction of the power transmission coil with respect to the power receiving coil to a user of the power receiving device based on a determination result of the coil positional relationship determination unit. You may provide the receiving coil position recognition means to recognize.

  A power receiving apparatus according to the present invention includes a power transmitting apparatus having a power transmitting coil, a power receiving coil that is electromagnetically coupled to the power transmitting coil, a secondary battery, and a secondary battery remaining capacity determining unit that determines a remaining capacity of the secondary battery. A secondary battery of the power receiving device from the power transmitting device via electromagnetic coupling between the power transmitting coil and the power receiving coil by disposing the power receiving device at a set position close to the power transmitting device. Non-contact power transmission to and data communication between the power transmission device and the power reception device, the power transmission device detects the position of the power reception coil, and the detection result of the coil position detection means The coil positional relationship determining means for determining the magnitude of the shift of the power receiving coil from the set position and the direction of the shift based on the determination results of the coil positional relationship determining means The determination result notified from the coil positional relationship notifying means of the power transmission device, which is a power receiving device for use in a non-contact power transmission and communication system provided with a coil positional relationship notification means for notifying the power receiving device by data communication Coil positional relationship reception detection means for detecting the positional relationship between the power transmission coil and the power reception coil, and the relative position or power reception of the power reception coil with respect to the power transmission coil based on the detection result of the coil positional relationship reception detection means A power transmission coil position recognizing unit is provided that allows a user of the power receiving apparatus to recognize at least one of the arrangement directions of the power transmission coil with respect to the coil.

  Here, the power receiving device of the present invention includes a secondary battery remaining amount recognizing unit that allows a user of the power receiving device to recognize the remaining amount of the secondary battery based on the determination result of the secondary battery remaining amount determining unit. May be.

  The non-contact power transmission and communication system of the present invention is characterized by using a power transmission device provided with the above-described receiving coil position recognition means. Alternatively, any one of the above-described power transmission devices and the power reception device including the above-described power transmission coil position recognition unit may be used. That is, the non-contact power transmission and communication system of the present invention includes a non-contact power transmission and at least one of a power transmission device including the power receiving coil position recognition unit or a power reception device including the power transmission coil position recognition unit. It is a communication system.

  According to the power transmission device, the power reception device, or the contactless power transmission and communication system using the power transmission device of the present invention, the power transmission device determines the position of the power reception coil and the deviation from the set position by the coil position detection means and the coil positional relationship. It is possible for the power transmitting apparatus to detect by determining by means, or to detect the power receiving apparatus by data communication of the positional relationship.

  Furthermore, the user can accurately and easily provide a means for recognizing the relative position of the power receiving coil and the power transmitting coil or the direction of deviation from the set position by a method such as display on at least one of the power transmitting device and the power receiving device. In addition, it is possible to grasp the optimal installation position of the receiving coil with high power transmission efficiency.

  As described above, according to the present invention, the positional relationship between the power transmission coil and the power reception coil is accurately determined, and the function of notifying the user of the optimal position by direction indication or the like is provided, so that the alignment can be performed accurately and easily. It is possible to obtain a power transmission device, a power reception device, or a non-contact power transmission and communication system using the power transmission device and power reception device that can be used and can be used in multi-version.

1 is a functional block diagram showing a basic configuration of a first embodiment of a power transmission device, a power reception device, and contactless power transmission and a communication system using them according to the present invention. The operation | movement flowchart explaining the flow of the non-contact electric power transmission and communication operation | movement in the non-contact electric power transmission and communication system of 1st Embodiment. The typical top view which shows one Embodiment of arrangement | positioning of a position detection coil. The typical top view which shows one Embodiment of the display of the power transmission / reception coil position direction display part of a receiving device. The typical top view which shows one Embodiment of the display of the power transmission / reception coil position direction display part of a receiving device. The typical top view which shows one Embodiment of the display of the power transmission / reception coil position direction display part of a power transmission apparatus. The typical top view which shows one Embodiment of the display of the secondary battery residual amount display part of a receiving device. The typical top view which shows one Embodiment of the display of the secondary battery residual amount display part of a power transmission apparatus. The top view which shows embodiment of a position detection coil in case a power transmission apparatus has several power transmission coil corresponding to multi-ization. The functional block diagram which shows the basic composition of 2nd Embodiment of the power transmission apparatus by this invention, a power receiving apparatus, and non-contact electric power transmission and communication system using them. The operation | movement flowchart explaining the flow of the non-contact electric power transmission and communication operation | movement in the non-contact electric power transmission and communication system of 2nd Embodiment. The functional block diagram which shows the basic composition of 3rd Embodiment of the power transmission device by this invention, power receiving device, and non-contact electric power transmission and communication system using them. The operation | movement flowchart explaining the flow of the non-contact electric power transmission and communication operation | movement in the non-contact electric power transmission and communication system of 3rd Embodiment. The top view which shows the whole structure of the electronic timepiece using the conventional non-contact electric power transmission apparatus, and its charging stand. The figure which shows the example of a display of the display part of the charging stand of the conventional non-contact electric power transmission apparatus of FIG. FIG. 15A shows a warning display A. FIG. FIG. 15B shows a warning display B. FIG. 15C shows the display C. FIG. 15D shows the display D.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a functional block diagram showing a basic configuration of a first embodiment of a power transmission device, a power reception device, and a non-contact power transmission and communication system using them according to the present invention. The contactless power transmission and communication system according to the present embodiment determines the remaining power of the power transmission device 100 having the power transmission coil 101, the power reception coil 151 that is electromagnetically coupled to the power transmission coil 101, the secondary battery 160, and the secondary battery 160. A power receiving device 150 having a secondary battery remaining amount determining unit 158 that is a secondary battery remaining amount determining means, and by placing the power receiving device 150 at a set position close to the power transmitting device 100, Contactless power transmission from the power transmission device 100 to the secondary battery 160 of the power reception device 150 and data communication between the power transmission device 100 and the power reception device 150 via electromagnetic coupling with the power reception coil 151 and It is a communication system.

  The power transmission device 100 according to the present embodiment includes a power supply unit 110, a power transmission control unit 103 that controls power transmission performed by applying a high-frequency AC voltage to the power transmission coil 101, a communication control unit 104 that controls data communication, Based on the detection result of the position detection coil 102, which is a coil position detection means for detecting the position of the power reception coil, and the detection result of the position detection coil 102, the magnitude and direction of the displacement from the set position of the power reception coil 151 are determined. Transmitting and receiving coil positional relationship determining unit 105 that is a coil positional relationship determining unit, and transmitting and receiving coil positional relationship that is a coil positional relationship notifying unit that notifies the power receiving device 150 of the determination result by the transmitting and receiving coil positional relationship determining unit 105 by data communication Based on the determination result by the notification unit 106 and the transmission / reception coil positional relationship determination unit 105, the power transmission coil of the power reception coil 151 is transmitted. The power receiving coil position direction display unit 107 is a power receiving coil position recognizing means for causing the user of the power receiving apparatus 150 to recognize at least one of the relative position with respect to 101 or the arrangement direction of the power transmitting coil 101 with respect to the power receiving coil 151, A secondary battery residual quantity detection unit 108 which is a secondary battery residual quantity reception detection means for receiving the residual quantity determination result of the secondary battery 160 notified by communication and detecting the residual quantity of the secondary battery 160; A secondary battery remaining amount display unit 109 that is a secondary battery remaining amount recognition unit that allows the user of the power receiving apparatus 150 to recognize the remaining amount of the secondary battery 160 based on the detection result of the battery remaining amount detection unit 108. Has been.

  The power receiving device 150 of the present embodiment includes a power transmission control unit 153 that controls power received by the power receiving coil 151, a communication control unit 154 that controls data communication, a secondary battery 160 that stores the received power, Transmitting and receiving coil positional relationship detection, which is a coil positional relationship reception detection unit that receives the determination result notified from the transmitting and receiving coil positional relationship notification unit 106 of the power transmitting apparatus 100 and detects the positional relationship between the power transmitting coil 101 and the receiving coil 151. Based on the detection results of the unit 155 and the power transmission / reception coil positional relationship detection unit 155, at least one of the relative position of the power reception coil 151 with respect to the power transmission coil 101 or the arrangement direction of the power transmission coil 101 with respect to the power reception coil 151 is indicated to the user of the power reception device 150. Receiving / receiving coil position / direction display unit 157 as a transmitting coil position recognizing means to be recognized, and a secondary battery A secondary battery remaining amount notification unit 162 that is a secondary battery remaining amount notification unit that notifies the power transmission device 100 of a result of remaining amount determination of the secondary battery 160 by the amount determination unit 158, and a secondary battery remaining amount determination unit. A secondary battery remaining amount display unit 159 that is a secondary battery remaining amount recognition unit that allows a user of the power receiving apparatus 150 to recognize the remaining amount of the secondary battery 160 based on the determination result of 158, and a memory that stores ID information Part 161.

  FIG. 2 is an operation flow diagram illustrating a flow of contactless power transmission and communication operation in the contactless power transmission and communication system according to the first embodiment. As shown in FIG. 1 and FIG. 2, as the first initial operation, the power transmitting device 100 transmits polling data and waits for detection of the power receiving device 150. When receiving the polling data, the power receiving device 150 transmits the ID information stored in the memory unit 161 to the power transmitting device 100. The power transmission device 100 detects the position of the power reception coil 151 by the position detection coil 102 at the time of this polling, determines the positional relationship of the power transmission / reception coil by the power transmission / reception coil positional relationship determination unit 105, and the power transmission / reception coil positional relationship notification unit 106 Then, the positional relationship information of the power transmission / reception coil is notified to the power receiving device 150 by data communication. Moreover, the power transmission apparatus 100 displays the position direction of the power receiving coil 151 on the user by the power transmission / reception coil position / direction display unit 107. The power receiving apparatus 150 receives and detects the positional relationship information of the power transmission / reception coil by data communication, and then displays the position direction of the power transmission coil 101 to the user by the power transmission / reception coil position / direction display unit 157. In addition, the power receiving device 150 determines the remaining amount of the secondary battery 160 and notifies the power transmitting device 100 of the remaining amount information of the secondary battery 160 through data communication. Moreover, the power receiving apparatus 150 displays the remaining amount of the secondary battery 160 to the user. When the power transmission device 100 receives the remaining amount information of the secondary battery 160 by data communication, the power transmission device 100 displays the remaining amount of the secondary battery 160. When the secondary battery 160 needs to be charged, power transmission is started and the secondary battery 160 is charged. When the secondary battery 160 is fully charged, the operation returns to the initial operation.

  FIG. 3 is a schematic plan view showing an embodiment of the arrangement of the position detection coils 102 installed in the power transmission device 100 in order to detect the position of the power reception coil 151. In this example, three position detection coils 102 are used, each of which detects a voltage generated from a magnetic field based on a data signal from the power reception coil 151 and determines the position of the power transmission coil 101 from the magnitude thereof. .

  FIG. 4 and FIG. 5 are schematic plan views each showing an embodiment of display on the power transmission / reception coil position / direction display unit 157 of the power receiving device 150. In this example, the position where the power transmission coil 101 that cannot be seen directly is present is displayed on a part of the LCD display screen 163 of the power receiving apparatus 150 with an arrow. The direction of the power transmission coil 101 is indicated by the direction of the arrow, and the distance to the power transmission coil 101 is indicated by the size of the arrow. By having such a display function, it is possible to accurately and easily align the power transmission / reception coil.

  FIG. 6 is a schematic plan view showing an embodiment of the display on the power transmission / reception coil position / direction display unit 107 of the power transmission device 100. In this example, the position where the power transmission coil 101 that cannot be directly seen exists is displayed by the power transmission / reception coil position direction display unit 107. That is, by displaying an arrow indicating the direction of the power transmission coil 101 with respect to the power reception coil 151 on the power transmission / reception coil position direction display unit 107, the position easily set by moving the power reception device 150 in the direction of the displayed arrow. Can be arranged.

  FIG. 7 is a schematic plan view showing an embodiment of the display of the secondary battery remaining amount display unit 159 of the power receiving device 150. In this example, the remaining amount of the secondary battery 160 (FIG. 1) is configured to be displayed with an indicator on a part of the LCD display screen 163 of the power receiving device 150. By having such a display function, it is possible to easily grasp the current charging state and the remaining charging time.

  FIG. 8 is a schematic plan view showing an embodiment of the display of the secondary battery remaining amount display unit 109 of the power transmission device 100. In this example, the remaining amount of the secondary battery 160 (FIG. 1) is displayed by an indicator provided in the power transmission device 100.

  In the embodiment of the position detection coil 102 described above, an example in which the power transmission device 100 has one power transmission coil and three position detection coils is shown. However, the present invention is not limited to this combination, and other coil combination methods may be used. Further, the power transmission coil 101 may be used in combination with the position detection coil 102. For example, FIG. 9 shows an embodiment of the position detection coil 102 in the case where the power transmission device 100 has a plurality of power transmission coils 101 that support multi-sizing. In this case, the plurality of power transmission coils 101 can also be used as the position detection coil 102.

  In the above embodiment, the power transmission / reception coil position / direction display units 107 and 157 are configured to have a position display function using an arrow display. However, the display is not limited to the arrow display, and may be a character display, a color display, or an indicator display. Further, in this embodiment, the display is used as the power receiving coil position recognizing means and the power transmitting coil position recognizing means. However, a means for recognizing by sound or an alarm other than the display may be used.

  Further, in the above embodiment, the secondary battery remaining amount display units 109 and 159 have a structure having a battery remaining amount display function by an indicator. However, the present invention is not limited to the indicator, and may be a character display or a color display. In this embodiment, the display is used as the secondary battery remaining power recognition means, but a means for recognizing by voice or alarm other than the display may be used.

  FIG. 10 is a functional block diagram showing the basic configuration of the second embodiment of the power transmission device, the power reception device, and the non-contact power transmission and communication system using them according to the present invention. Similarly to the first embodiment, the non-contact power transmission and communication system of the present embodiment also includes a power transmission device 200 having a power transmission coil 201, a power receiving coil 251 that is electromagnetically coupled to the power transmission coil 201, a secondary battery 260, and a second battery. A power receiving device 250 having a secondary battery remaining amount determining unit 258 that determines a remaining amount of the secondary battery 260, and a set position where the power receiving device 250 is close to the power transmitting device 200 By connecting the power transmission coil 201 and the power reception coil 251 to each other, the non-contact power transmission from the power transmission device 200 to the secondary battery 260 of the power reception device 250 and between the power transmission device 200 and the power reception device 250 are performed. A non-contact power transmission and communication system for performing data communication.

  However, the power transmission device 200 according to the present embodiment has the same functions as those of the power transmission device 100 according to the first embodiment, the power supply unit 210, the power transmission control unit 203, the communication control unit 204, and the position of the power receiving coil. A position detection coil 202 for detecting the power, a power transmission / reception coil positional relationship determination unit 205 for determining the magnitude and direction of deviation of the power reception coil 251 from the set position, and a transmission for notifying the power reception device 250 of the determination result. The power receiving coil position relationship notifying unit 206 and the secondary battery remaining amount detecting unit 208 that receives the power from the power receiving device 250 and detects the remaining amount of the secondary battery 260 are configured. The receiving coil position direction display unit and the secondary battery remaining amount display unit which is a secondary battery remaining amount recognition unit are not provided.

  On the other hand, the power receiving device 250 of the present embodiment has the same functions as those of the power receiving device 150 of the first embodiment, the power transmission control unit 253, the communication control unit 254, the secondary battery 260, and the power transmission device 200. Power receiving coil positional relationship detection unit 255 that receives the determination result notified from and detects the positional relationship between power transmission coil 201 and power receiving coil 251, and power transmission / reception that causes the user to recognize the coil position based on the detection result A coil position / direction display unit 257, a secondary battery remaining amount notification unit 262 for notifying the power transmission apparatus 200 of the remaining amount determination result of the secondary battery 260, and a secondary battery for allowing the user to recognize the remaining amount of the secondary battery 260. The remaining amount display unit 259 and a memory unit 261 that stores ID information are included, and all functions similar to those of the power receiving device 150 according to the first embodiment are provided.

  FIG. 11 is an operation flowchart for explaining a flow of contactless power transmission and communication operation in the contactless power transmission and communication system according to the second embodiment. As illustrated in FIGS. 10 and 11, as the first initial operation, the power transmission device 200 transmits polling data and waits for detection of the power reception device 250. When receiving the polling data, the power receiving apparatus 250 transmits the ID information stored in the memory unit 261 to the power transmitting apparatus 200. The power transmission device 200 detects the position of the power receiving coil 251 at the time of this polling, determines the positional relationship of the power transmitting / receiving coil, and notifies the power receiving device 250 of the positional relationship information of the power transmitting / receiving coil by data communication. When receiving the positional relationship information of the power transmission / reception coil by data communication, the power reception device 250 displays the position direction of the power transmission coil 201 to the user. The power receiving device 250 determines the remaining amount of the secondary battery 260 and notifies the power transmitting device 200 of the remaining amount information of the secondary battery 260 through data communication. In addition, the power receiving device 250 displays the remaining amount of the secondary battery 260 to the user. When the secondary battery 260 needs to be charged, power transmission is started and the secondary battery 260 is charged. When the secondary battery 260 is fully charged, the operation returns to the initial operation.

  FIG. 12 is a functional block diagram showing the basic configuration of the third embodiment of the power transmission device, power reception device, and non-contact power transmission and communication system using them according to the present invention. Similarly to the first embodiment, the non-contact power transmission and communication system of the present embodiment also includes a power transmission device 300 having a power transmission coil 301, a power receiving coil 351 that is electromagnetically coupled to the power transmission coil 301, a secondary battery 360, and a second battery. A power receiving device 350 having a secondary battery remaining amount determining unit 358 for determining the remaining amount of the secondary battery 360, and by arranging the power receiving device 350 at a set position close to the power transmitting device 300. Contactless power transmission from the power transmission device 300 to the secondary battery 360 of the power reception device 350 and data communication between the power transmission device 300 and the power reception device 350 via electromagnetic coupling with the power reception coil 351, and It is a communication system.

  The power transmission device 300 according to the present embodiment has the same functions as those of the power transmission device 100 according to the first embodiment, and positions of the power supply unit 310, the power transmission control unit 303, the communication control unit 304, and the power reception coil 351. Position detection coil 302 to be detected, power transmission / reception coil positional relationship determination unit 305 for determining the magnitude and direction of deviation of the power reception coil 351 from the set position, and power transmission / reception coil position as power reception coil position recognition means A direction display unit 307, a secondary battery remaining amount detection unit 308 that receives the power from the power receiving device 350 and detects the remaining amount of the secondary battery 360, and a secondary battery remaining amount display unit 309 that is a secondary battery remaining amount recognition unit. And has all the same functions as those of the power transmission device 100 according to the first embodiment.

  On the other hand, the power receiving device 350 of the present embodiment has the same functions as those of the power receiving device 150 of the first embodiment, the power transmission control unit 353, the communication control unit 354, the secondary battery 360, and the secondary battery. 360 includes a secondary battery remaining amount notification unit 362 that notifies the power transmission device 300 of the remaining battery level determination result, and a memory unit 361 that stores ID information, but receives coil position information from the power transmission device 300. The power transmission / reception coil position relationship detection unit, the power transmission / reception coil position direction display unit for displaying the result, and the secondary battery remaining amount display unit are not provided.

  FIG. 13 is an operation flow diagram illustrating a flow of contactless power transmission and communication operation in the contactless power transmission and communication system according to the third embodiment. As shown in FIGS. 12 and 13, as the first initial operation, the power transmission device 300 transmits polling data and waits for detection of the power reception device 350. When receiving the polling data, the power receiving device 350 transmits the ID information stored in the memory unit 361 to the power transmitting device 300. The power transmission device 300 detects the position of the power reception coil 351 at the time of this polling, determines the positional relationship of the power transmission / reception coil, and displays the position direction of the power reception coil 351 to the user. In addition, the power receiving device 350 determines the remaining amount of the secondary battery 360 and notifies the power transmitting device 300 of the remaining amount information of the secondary battery 360 through data communication. When the power transmission device 300 receives the remaining amount information of the secondary battery 360 by data communication, the power transmission device 300 displays the remaining amount of the secondary battery 360. When the secondary battery 360 needs to be charged, power transmission is started and the secondary battery 360 is charged. When the secondary battery 360 is fully charged, the operation returns to the initial operation.

  As described above, according to the present invention, it is possible to obtain a power transmitting device, a power receiving device, or a non-contact power transmission and communication system using them, which can be aligned accurately and easily and is also compatible with multiple devices.

  Although the embodiments of the present invention have been described, it is needless to say that the present invention is not limited to the above-described embodiments, and even if there is a design change within a scope not departing from the gist of the present invention. included. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  The power transmission device, power reception device, and non-contact power transmission and communication system of the present invention can be used for mobile terminal devices such as mobile phones, digital cameras, headsets, digital videos, game controller devices, and charging devices thereof. . Moreover, it is applicable also to the apparatus and its charging device which require large electric power, such as a motor vehicle.

100, 200, 300 Power transmission device 101, 201, 301 Power transmission coil 102, 202, 302 Position detection coil 103, 153, 203, 253, 303, 353 Power transmission control unit 104, 154, 204, 254, 304, 354 Communication control Units 105, 205, 305 Transmission / reception coil positional relationship determination units 106, 206 Transmission / reception coil positional relationship notification units 107, 157, 257, 307 Transmission / reception coil position direction display units 108, 208, 308 Secondary battery remaining amount detection unit 109 159, 259, 309 Secondary battery remaining capacity display units 110, 210, 310 Power supply units 150, 250, 350 Secondary battery remaining capacity determination unit 160, 260, 360 Secondary battery 161, 2 61, 361 Memory unit 162, 262, 362 Secondary battery remaining amount notification unit 163 LCD display screen 400 Charging stand 401 Electronic clock 402 Recess 404 Display unit

Claims (8)

A power receiving device having a power transmitting device having a power transmitting coil; a power receiving coil that is electromagnetically coupled to the power transmitting coil; a secondary battery; and a secondary battery remaining amount determining unit that determines a remaining amount of the secondary battery. Contactless power from the power transmission device to the secondary battery of the power reception device via electromagnetic coupling between the power transmission coil and the power reception coil by disposing the device at a set position close to the power transmission device A power transmission device used for transmission and data communication between the power transmission device and the power reception device for contactless power transmission and communication system, the coil position detection means for detecting the position of the power reception coil, and the coil position detection and the deviation size and coil position relationship determining means for determining the direction of the deviation from the set position of the power receiving coil on the basis of the means of detection result, the coil Power transmitting apparatus characterized by comprising a coil positional relationship notifying means for notifying the determination result of the location relation determining unit to the power receiving apparatus by said data communication.   The power receiving apparatus includes a non-contact power transmission and communication system including a secondary battery remaining amount notifying unit that notifies the power transmission device of the secondary battery remaining amount determination result by the secondary battery remaining amount determining unit through the data communication. A secondary battery that receives the secondary battery residual quantity determination result notified from the secondary battery residual quantity notifying means of the power receiving apparatus and detects the secondary battery residual quantity. A remaining battery level detection unit; and a secondary battery level recognition unit that allows a user of the power receiving apparatus to recognize the remaining level of the secondary battery based on a detection result of the secondary battery level reception detection unit. The power transmission device according to claim 1.   Receiving coil position recognizing means for causing the user of the power receiving apparatus to recognize at least one of a relative position of the power receiving coil with respect to the power transmitting coil or an arrangement direction of the power transmitting coil with respect to the power receiving coil based on a determination result of the coil positional relationship determining means. The power transmission device according to claim 1, wherein the power transmission device is provided.   A power receiving device having a power transmitting device having a power transmitting coil; a power receiving coil that is electromagnetically coupled to the power transmitting coil; a secondary battery; and a secondary battery remaining amount determining unit that determines a remaining amount of the secondary battery. Contactless power transmission from the power transmitting device to the secondary battery of the power receiving device via electromagnetic coupling between the power transmitting coil and the power receiving coil by disposing the device at a set position close to the power transmitting device And data communication between the power transmitting device and the power receiving device, the power transmitting device detecting a position of the power receiving coil, and a coil position detecting means for detecting the position of the power receiving coil based on a detection result of the coil position detecting means. Coil positional relationship determining means for determining the magnitude of the deviation from the set position and the direction of the deviation, and the determination result of the coil positional relationship determining means by the data communication A power receiving device for use in a non-contact power transmission and communication system provided with a coil positional relationship notifying means for notifying the power receiving device, wherein the determination result notified from the coil positional relationship notifying means of the power transmitting device is received. Coil positional relationship reception detection means for detecting a positional relationship between the power transmission coil and the power reception coil, and a relative position of the power reception coil with respect to the power transmission coil based on a detection result of the coil positional relationship reception detection means, or a power transmission coil with respect to the power reception coil A power receiving device comprising: a power transmission coil position recognizing unit that allows a user of the power receiving device to recognize at least one of the arrangement directions. 5. The apparatus according to claim 4 , further comprising: a secondary battery remaining amount recognizing unit that makes a user of the power receiving apparatus recognize a remaining amount of the secondary battery based on a determination result of the secondary battery remaining amount determining unit. The power receiving apparatus described.   A non-contact power transmission and communication system using the power transmission device according to claim 3. A contactless power transmission and communication system using the power transmission device according to any one of claims 1 to 3 and the power reception device according to claim 4 . A non-contact power transmission and communication system using the power transmission device according to any one of claims 1 to 3 and the power reception device according to claim 5 .

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