JPWO2009014125A1 - Rechargeable battery unit, power transmission system and power transmission method therefor - Google Patents

Abstract

Provided are a rechargeable battery unit capable of appropriately transmitting and supplying power in a contactless manner corresponding to various electronic devices, a power transmission system and a power transmission method therefor. The rechargeable battery unit according to the present invention includes at least identification information for specifying a battery unit, a communication means that transmits and receives information associated with power transmission using a wireless signal, and power from the power supply apparatus without contact. Power receiving means for receiving the received power, a secondary battery for storing the received power, a charging means for charging the received power to the secondary battery, a charging state monitoring means for monitoring the charging state of the secondary battery, and the secondary Charging control means for controlling the charging means in accordance with the state of charge of the battery, received power monitoring means for monitoring the power receiving state, and power reception information for appropriately controlling the received power corresponding to the rechargeable battery unit. Receiving information transmitting means for transmitting to the power supply device via the communication means.

Description

  The present invention relates to a rechargeable battery unit, a power transmission system and a power transmission method therefor, and more specifically, various rechargeable battery units of different types and appropriately transmitting power to the rechargeable battery unit without contact. The present invention relates to a power transmission system and a power transmission method.

  A portable electronic device is driven by a primary battery or a secondary battery built in as a normal power source, and a charger is connected to the electronic device incorporating the secondary battery, and power is supplied to the internal secondary battery. Maintain that power. Small electronic devices that do not require much power consumption, such as electric toothbrushes, cordless phones, and PHSs, are still configured to be charged contactlessly without having a connection terminal for receiving power. A charging device that supplies power at a contact point is used.

  The movement to apply such a power transmission system that transmits and supplies power without contact to electronic devices with relatively high power consumption, such as mobile phones and laptop computers, has the goal of improving power transmission efficiency. In recent years, it has become more active. As a relatively large power transmission method, an electromagnetic induction type (transformer coupling) using an electromotive force generated by a change in strength of magnetic flux passing between coils is used.

Furthermore, not only does a non-contact charger correspond to each electronic device, but it also incorporates a universal charging device that can charge any electronic device on a table in a store in the city, reflecting the ubiquitous era. There is also a movement to charge the battery simply by placing it on a charging base on a flat plate like an electromagnetic cooker. As a system for charging without contact without having a connection terminal for supplying power, for example, Patent Document 1 discloses a non-contact chargeable battery system, a charging device, and a battery pack.
JP 2006-115562 A

  However, in order to supply appropriate power without destroying internal electronic components to various electronic devices such as power consumption, voltage, capacity, and shape of the built-in secondary battery, There is a problem in that it is necessary to perform power transmission suitable for the device, and the electronic device itself needs each control system so that each device can receive it appropriately. In addition, there is a problem that it is necessary to consider safety in response to heat generation, smoke generation, ignition, etc., taking into account the case where a foreign object such as a metal different from the charging device on the flat plate is placed. is there.

  Therefore, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to be charged in a contactless manner without having a connection terminal for power supply and attached to various electronic devices. Another object of the present invention is to provide a rechargeable battery unit that can be universalized, and a power transmission system and a power transmission method that can appropriately transmit and supply power to the rechargeable battery unit.

The rechargeable battery unit according to the present invention made to achieve the above object is a rechargeable battery unit that is attached to an electronic device and charged by being supplied with electric power from a power supply device in a contactless manner.
Communication means including at least identification information for specifying the battery unit, and transmitting and receiving information associated with power transmission with the power supply device using a radio signal, and power for receiving power from the power supply device in a contactless manner A receiving unit; a secondary battery that stores the power received by the power receiving unit; a charging unit that charges the secondary battery with the power received by the power receiving unit; and a charge state of the secondary battery is monitored. A charging state monitoring unit; a charging control unit that controls the charging unit according to the monitored charging state of the secondary battery; a received power monitoring unit that monitors a power receiving state received by the power receiving unit; Receiving information transmitting means for transmitting to the power supply apparatus via the communication means power receiving information for appropriately controlling the received power received corresponding to the rechargeable battery unit. And features.

The rechargeable battery unit of the present invention provides the power supply device with charge control information for controlling the power supplied from the power supply device according to the charge state of the secondary battery monitored by the charge state monitoring means. Charge control information transmitting means for transmitting via the communication means can be further provided.
The communication means in the rechargeable battery unit according to the present invention is based on any one or more communication methods selected from short-range wireless communication, infrared communication, and communication performed via an electromagnetic field or electromagnetic wave during power transmission. Done.
The rechargeable battery unit of the present invention further includes an electric double layer capacitor capable of rapid charging at a charging rate at which a charging capacity is twice or more per unit time with respect to the secondary battery, and the charging means includes the charging unit First charging means for charging the electric double layer capacitor with the electric power received by the electric power receiving means, and second charging means for charging the secondary battery with electric power of the electric double layer capacitor charged by the first charging means. And can be included.

The power transmission system according to the present invention made to achieve the above object is a system for transmitting and supplying power in a contactless manner from a power supply device to a rechargeable battery unit attached to an electronic device,
The rechargeable battery unit includes at least identification information for identifying the rechargeable battery unit, and includes a communication unit that exchanges information associated with power transmission with the power supply device using a wireless signal, A power receiving means for receiving power at the contact; a secondary battery for storing the power received by the power receiving means; a charging means for charging the secondary battery with the power received by the power receiving means; and the secondary battery Charge state monitoring means for monitoring the charge state of the battery, charge control means for controlling the charge means in accordance with the monitored charge state of the secondary battery, and monitoring the power receiving state received by the power receiving means. Received power monitoring means, and received information for transmitting the received power for appropriately controlling the monitored received power corresponding to the rechargeable battery unit to the power supply device via the communication means. And signal means, equipped with a,
The power supply device reads identification information reading means for reading the identification information transmitted from the rechargeable battery unit via the communication means, and reads identification information of the rechargeable battery unit by the identification information reading means. A rechargeable battery unit identifying means for identifying the rechargeable battery unit, a power supply means for supplying power to the rechargeable battery unit without contact, and a control information retaining means for retaining power supply control information for each rechargeable battery unit corresponding to the identification information , Receiving information receiving means for receiving the power receiving information transmitted from the rechargeable battery unit via the communication means, and responding by controlling the power supplying means based on the power supply control information and the power receiving information Power supply control means for supplying power suitable for the rechargeable battery unit.

The rechargeable battery unit in the power transmission system according to the present invention includes charge control information for controlling power supplied from the power supply device in accordance with a charge state of the secondary battery monitored by the charge state monitoring unit. Charging control information transmitting means for transmitting to the power supply device via the communication means,
The power supply device further includes charge control information receiving means for receiving charge control information transmitted from the rechargeable battery unit via the communication means,
The power supply control means can control the power supplied by the power supply means based on the power supply control information, the power reception information, and the charge control information.
Further, the communication means in the power transmission system of the present invention is any one or more communications selected from short-range wireless communications, infrared communications, and communications performed via electromagnetic fields or electromagnetic waves during power transmission. This is done by the method.
The rechargeable battery unit in the power transmission system of the present invention further includes an electric double layer capacitor capable of rapid charging with a charging rate of 5 times or more per unit time with respect to the secondary battery,
The charging means includes a first charging means for charging the electric double layer capacitor with the electric power received by the electric power receiving means, and an electric power of the electric double layer capacitor charged by the first charging means to the secondary battery. And a second charging means for charging.

Here, the power supplied by the power supply means is transmitted by electromagnetic induction between a primary power supply unit of the power supply device and a secondary power supply unit of the rechargeable battery unit, and the power supply It is preferable that the apparatus further includes a coupling degree detection unit that detects a coupling degree between the primary power supply unit and the secondary power reception unit.
The coupling degree detection unit can detect the change based on a change in one or more characteristics selected from power consumption, frequency characteristics, and phase characteristics of the primary power supply unit.
The battery unit includes means for changing a load state of the secondary power receiving unit, and the coupling degree detection unit is configured to change the primary power according to a change in the load state of the secondary power receiving unit. This can be detected by a change in the characteristics of the side power supply unit.
The power supply device is a control information correction unit that corrects control information of the power supply control unit based on a coupling degree between the primary power supply unit and the secondary power reception unit detected by the coupling degree detection unit. Can be further provided.
The power supply device has a plurality of drive units that can be controlled and driven independently of each other on the primary side power supply unit, and the coupling degree detection means is based on the coupling degree of the respective driving units. The drive part which supplies electric power to a rechargeable battery unit can be selected.
In the power supply device, a plurality of the rechargeable battery units are specified by the identification information reading unit and the rechargeable battery unit identifying unit, and the coupling degree of the driving unit detected by the coupling degree detecting unit is the plurality of rechargeable battery units. Can be transmitted and supplied to the plurality of rechargeable battery units in a time-sharing manner.

The power supplied by the power supply means is transmitted by electromagnetic induction between a primary power supply unit of the power supply device and a secondary power supply unit of the rechargeable battery unit, and the power supply device Preferably further includes a current detecting means for detecting a current of the primary power supply unit.
The power supply device may be selected from voltage, current, resistance value, capacitance, magnetic flux, pressure, sound, light, and temperature that an object is placed on the power supply device. It can detect by the above change.
In addition, the power supply device includes external communication means for exchanging information with an external device, and control information update means for receiving and updating power supply control information of the control information holding means via the external communication means. Are preferably further provided.

A power transmission method according to the present invention made to achieve the above object is provided in a rechargeable battery unit comprising communication means having identification information and transmitting / receiving information using a radio signal, a secondary battery, and a charging unit thereof. , A method of transmitting and supplying electric power from a power supply device in a contactless manner,
The identification information of the rechargeable battery unit is read via the communication means, the rechargeable battery unit identification stage for specifying the rechargeable battery unit, the charge state of the secondary battery is monitored, and the power supply device Charging control information transmission stage for transmitting charging control information for controlling supply power from the rechargeable battery unit to the power supply device via the communication means; and the communication means from the rechargeable battery unit in the power supply device. The charge control information receiving step for receiving the charge control information via the power supply control information for each rechargeable battery unit specified by the identification information and the charge control information received in the charge control information receiving step And a power supply control stage for controlling power supplied to the rechargeable battery unit.

When the identification information cannot be read and the rechargeable battery unit cannot be specified at the rechargeable battery unit identification stage, it is preferable to stop the subsequent processing and alert the user by at least either sound or display output.
The power supply from the power supply device to the rechargeable battery unit is performed by electromagnetic induction between a primary power supply unit of the power supply device and a secondary power supply unit of the rechargeable battery unit, It further has a coupling degree detection step for detecting a coupling degree between the secondary power supply unit and the secondary power receiving unit, and is specified for the coupling degree detected in the coupling degree detection step and each rechargeable battery unit. If the value obtained by comparing the combined power supply control information is not within a predetermined range, it is preferable to stop the power supply and alert the user at least by sound or display output.

  According to the rechargeable battery unit and the power transmission system and power transmission method therefor according to the present invention, by applying a system that transmits power without contact without a connection terminal to a universally rechargeable battery unit, 2 It becomes possible to attach to various electronic devices without requiring a control system corresponding to each electronic device in which the secondary battery is incorporated. In addition, since devices that take into account foreign objects such as metals are provided, even when installed in shops and coffee shops in the city, power is supplied to the rechargeable battery unit that is installed in electronic devices owned by the user regardless of the location. And the built-in secondary battery can be safely charged.

Hereinafter, a specific example of the best mode for carrying out a rechargeable battery unit, a power transmission system and a power transmission method therefor according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a rechargeable battery unit according to an embodiment of the present invention and a power supply device used therefor.

  As shown in FIG. 1, as a rechargeable battery unit according to an embodiment of the present invention and a power supply device used therefor, specifically, charging a secondary battery built in a rechargeable battery unit that is a target of power transmission. However, it is clear that it can be applied to other than the charging system. Further, each means of the power supply device 10 and the rechargeable battery unit 30 shown in FIG. 1 operates in cooperation with an electronic circuit, a mechanical component, a CPU, a memory, firmware, an application program, and the like mounted on each device. The drawings and explanations other than the contents directly related to the present invention are omitted.

  A rechargeable battery unit 30 shown in FIG. 1 incorporates a secondary battery 33 that is mounted on an electronic device and operates an electronic circuit inside the electronic device, and the power received by the power receiving means 32 is the charging means 34. As a result, the secondary battery 33 is charged. The charging control unit 36 controls charging of the secondary battery 33 according to the charging voltage, charging current, temperature at the time of charging, and the like, and the charging state is monitored by the charging state monitoring unit 35. The power receiving unit 32 may include an electric double layer capacitor 40 that can rapidly charge the received power as it is. For example, the first charging unit of the charging unit 34 keeps the electric double layer capacitor 40 at a high voltage. It is also possible to configure such that the battery is quickly charged once and then gradually charged by the second charging means while being stepped down in accordance with the voltage and the charging rate of the secondary battery 33 with a switching power supply or the like (not shown). With this configuration, the rechargeable battery unit 30 can be quickly charged, and the rechargeable battery unit 30 can be used for a time corresponding to the capacity of the electric double layer capacitor 40. It can respond to requests that you want to use for a short time. In addition, although detailed description of the function of the electric double layer capacitor 40 is omitted here, a battery that can be rapidly charged at a charging rate at which the charging capacity of the secondary battery 33 is at least twice per unit time is used. Use.

  When supplying power from the power supply device 10 to the rechargeable battery unit 30 in a contactless manner, the communication unit 31 charges the rechargeable battery unit 30 so that the type and the like can be specified even if the rechargeable battery unit 30 has no power source. The identification information is transmitted before the power supply to the battery unit 30 is started. In order for the rechargeable battery unit 30 to receive power under optimum control, the rechargeable battery unit 30 is unique to each rechargeable battery unit 30. It is desirable to have unique (unique) identification information (ID). If it is sufficient to classify the type of the rechargeable battery unit 30, it may have an ID for each type. In this embodiment, it is assumed that the capacity of the secondary battery is empty, and an example of a short-range communication method using a proximity type wireless tag (RFID) of ISO / IEC15693 is used as a method that does not require a built-in power supply. However, by supplying appropriate power from the power supply device 10 before the start of charging, it is possible to use infrared communication such as IrDA, IrSimple, etc., or identification information via electromagnetic fields or electromagnetic waves during power transmission. It can also be configured to receive.

  Thus, before the power is supplied from the power supply device 10 to the rechargeable battery unit 30, the identification information transmitted from the rechargeable battery unit 30 via the communication unit 31 is appropriately appropriate for the rechargeable battery unit 30. Even if the capacity of the secondary battery 33 in the rechargeable battery unit 30 is zero, the rechargeable battery unit 30 is identified by reading this identification information with the power supply device 10, and each rechargeable battery The power corresponding to the unit 30 is transmitted to enable appropriate charging.

  The received power monitoring means 37 monitors the receiving state of the power received by the power receiving means 32, and is supplied by the receiving information transmitting means 38 with the monitored power receiving state, that is, its voltage and current as power receiving information. The power is transmitted to the device 10 in almost real time and fed back so that the power supply device 10 can supply power to the rechargeable battery unit 30 appropriately and safely. The power reception information is superimposed on an electromagnetic field or electromagnetic wave during power transmission, for example, via the communication unit 31 and is transmitted and received between the rechargeable battery unit 30 and the power supply device 10 by realizing bidirectional communication.

  The charging control information transmitting means 39 transmits the charging state of the secondary battery 33 constantly monitored by the charging state monitoring means 35 and its charging control information to the power supply device 10 in almost real time and feeds it back. The secondary battery 33 can be charged more appropriately and safely. In the present embodiment, considering that the information communication function is incorporated into the charge control IC, the charge control information is transmitted and received superimposed on the electromagnetic field or electromagnetic wave during power transmission, and bidirectional communication is realized to provide information on charging. Make sure to give and receive. In contrast to this, using a configuration in which charging control information is transmitted / received by infrared communication such as IrDA, IrSimple or the like, or an extended ad hoc communication mode in a non-contact IC card such as a proximity type of ISO / IEC14443 or ISO / IEC18092, for example. You may comprise so that bidirectional communication may be implement | achieved and charging control information may be transmitted / received by this. The communication means 31 of the present embodiment is also responsible for transmission / reception of power reception information and charge control information during power transmission as described above, and the communication medium at that time is based on a wireless tag (RFID) and at the time of power transmission. However, it is also possible to unify by one method using a communication method such as infrared communication or proximity type.

  The power supply device 10 includes an identification information reading unit 11 that reads an ID (identification information) transmitted from the rechargeable battery unit 30 via the communication unit 31, and the control information holding unit 14 in the power supply device 10 is provided in advance. With reference to a registered information table (not shown), the rechargeable battery unit identification unit 12 obtains power supply control information corresponding to the various rechargeable battery units 30 using the ID read by the identification information reading unit 11 as a search key. Thus, it is possible to appropriately perform power transmission and power supply to the corresponding rechargeable battery unit 30. At that time, it may be configured to be compatible with wireless tags of other standards such as different radio frequencies, and the identification information reading unit 11 may correspond to a plurality of standards and confirm responses in order.

  The power supply means 13 does not have an electrical connection terminal and uses an electromagnetic field to transmit power to the rechargeable battery unit 30 in a contactless manner and supply power. In this embodiment, the efficiency is considered. In addition, a primary side coil is provided as a primary side power supply unit of the power supply device 10, and a secondary side coil is provided as a secondary side power receiving unit of the rechargeable battery unit 30, and the primary side coil and the secondary side coil are provided. An electromagnetic induction method is used in which electric power is transmitted using an electromotive force (transformer coupling) generated by a change in the strength of magnetic flux between them. There are other known transmission efficiencies, but radio wave reception methods such as wireless tags used in the UHF band and those using magnetic resonance that are expected to be put to practical use are known. Of course, these methods may be used depending on the situation.

  In the power supply control means 16, the rechargeable battery unit identification means 12 refers to the information table of the control information holding means 14 using the ID read by the identification information reading means 11 as a search key, and the corresponding rechargeable battery unit 30 is specified. Thus, control information for power supply to the rechargeable battery unit 30 that is the target of power transmission is obtained, and the power supplied by the power supply means 13 is controlled based on this power supply control information.

  In the receiving information receiving means 15, the receiving power monitoring means 37 of the rechargeable battery unit 30 monitors the receiving state such as the voltage and current of the secondary power receiving section, and the receiving information transmitting means 38 sends the communication means 31 from the rechargeable battery unit 30. Power reception information transmitted by being superimposed on electromagnetic waves during power transmission is received, and the received power reception information is fed back to the power supply control means 16 to the rechargeable battery unit 30 in almost real time. Supply power is controlled.

  The charge control information receiving means 17 is superposed on the electromagnetic waves during power transmission from the rechargeable battery unit 30 via the communication means 31 by the charge control information transmitting means 39 monitored by the charge state monitoring means 35 in the rechargeable battery unit 30. The transmitted charge state of the secondary battery 33 and its charge control information are received almost in real time, and the received charge control information is fed back to the power supply control means 16 for power supply control to the rechargeable battery unit 30. Reflected. Although the feedback of the charging control information for the secondary battery 33 can be used as an alternative to the feedback of the power reception information of the secondary power receiving unit, in the present embodiment, in accordance with the charging state in addition to the power receiving state Used for comprehensive control so that power can be supplied.

  The coupling degree detection means 18 not only determines whether or not the rechargeable battery unit 30 is properly placed on the power supply device 10 by detecting the coupling degree between the primary side coil and the secondary side coil. It is also used to discriminate foreign substances that are not power transmission objects, and is also used to discriminate when a plurality of the same or different types of rechargeable battery units 30 are placed. As a detection method of the coupling degree detection means 18, since the type of the rechargeable battery unit 30 can be specified in advance by the ID read by the identification information reading means 11, its power supply control information is also specified by the rechargeable battery unit identification means 12. The rechargeable battery unit 30 can be obtained for each rechargeable battery unit 30, thereby comparing the value of the degree of coupling in a range assumed in advance with the value of the degree of coupling when the rechargeable battery unit 30 is actually placed. It can be determined whether the rechargeable battery unit 30 specified by the identification unit 12 has been properly placed or foreign matter has been placed.

  Further, the primary side coil is composed of a plurality of drive units, that is, a plurality of coils. For example, as shown in FIG. 4, the primary side coil is composed of four coils and one coil surrounding them. It can be configured to be driven and controlled independently. By detecting the degree of coupling of each coil, the position where the rechargeable battery unit 30 is placed can be specified based on the degree of coupling, and the coil determined to be the most appropriate according to the placement position is driven. Thus, electric power can be supplied to the rechargeable battery unit 30. Thus, when a plurality of rechargeable battery units 30 are placed, a plurality of placed rechargeable batteries are driven by simultaneously or time-divisionally driving the corresponding coils determined to be properly placed. Power can be transmitted and supplied to the unit 30 simultaneously or substantially simultaneously. The plurality of rechargeable battery units 30 that are supplied with power at the same time or substantially at the same time can support both the same type and different types. The driving of the coils is not limited to either simultaneous or time division, and they may be combined. The time division is determined by the timing measured in advance according to the combination of the rechargeable battery units 30, and the information is recorded in the information table (not shown) of the control information holding means 14. In contrast, the time division timing can be set to a fixed value regardless of the type of the rechargeable battery unit 30.

  The communication with each rechargeable battery unit 30 and the identification of the information are identification information unique to each rechargeable battery unit 30 recorded in the information table of the control information holding means 14 in advance, or a random number generated in the power supply device 10. Etc. can be used for each header information at the time of transmission / reception. The shape of the primary coil is not limited to the form as shown in FIG. 4, and the number of coils is not limited to five. Of course, there may be a form with only one drive coil. Further, the coil is not only arranged in a planar shape, but can be variously modified depending on the shape of the charging stand and the form of the rechargeable battery unit 30.

  As a specific method for detecting the coupling degree, a change in frequency characteristics such as a self-resonant frequency and impedance of the primary coil of the power supply apparatus 10 caused by a change in the coupling degree between the primary coil and the secondary coil, A change in phase, a difference between an assumed value of the current flowing in the primary coil of each rechargeable battery unit 30 and a current value when the rechargeable battery unit 30 is actually placed, a Hall element that converts a magnetic field into an electric signal The change value etc. of the used magnetic field can be digitized and used. In addition, when detecting the degree of coupling, the load-related parameters are changed by changing the load on the secondary coil of the rechargeable battery unit 30 or changing the voltage or current of the charging circuit to change the degree of coupling or the expected value. It is also possible to increase the accuracy in consideration of the difference between the actual value and the actual value.

  When changing the load of the secondary side coil of the rechargeable battery unit 30, it is set so that a predetermined load is applied in the initial state assuming that the capacity of the secondary battery 33 is empty, It is desirable that the load be switched accordingly. Even during charging, the power supply device 10 communicates with the rechargeable battery unit 30 through an electromagnetic field or electromagnetic wave during power transmission, and changes the load state of the secondary coil to control power supply according to the degree of coupling. Is also possible.

  FIG. 3 is an explanatory diagram of a circuit configuration for changing the load on the secondary coil of the rechargeable battery unit 30. The rechargeable battery unit 30 assumes that the capacity of the secondary battery 33 is empty, and in the initial state, turns on the switch S2 to set a predetermined value of the resistor R2 as a load, and charges the secondary battery 33 side. The circuit is initially charged in the secondary battery 33 by opening the switch S1 and limiting the power supply through a relatively large resistor R1. At this time, the coupling degree detection means 18 obtains the coupling degree at the time of initial setting. Setting the resistor R2 as a load in the initial state can prevent an inadvertent voltage from being applied to the electronic components of the rectifier diode and the charging circuit, and also serves as a protection circuit.

  When the secondary battery 33 is charged to some extent, the switch S2 is opened, the switch S1 is turned on to short-circuit the resistor R1, and the secondary battery 33 is fully charged by supplying power to the charging circuit as it is. The power supply apparatus 10 communicates with the rechargeable battery unit 30 during the main charging by the coupling degree detection means 18 to instruct conduction and release of the switches S1 and S2, and changes the load state to be used for the coupling degree detection. be able to. Note that the resistors R1 and R2 and the switches S1 and S2 shown in FIG. 3 are used for the principle explanation, and are actually realized by combining a semiconductor switch and a current source.

  The control information correction unit 19 detects the coupling degree between the primary side coil and the secondary side coil by the coupling degree detection unit 18, corrects the control information of the power supply control unit 16 according to the detected coupling degree, and recharges the battery. Correction is performed so that different transmission powers are as much as possible depending on the mounting position of the unit 30 and the like. If the correction limit value is exceeded and the efficiency is less than or equal to the specified efficiency, the power transmission is stopped, and although not shown, LED warning display, buzzer warning sound, LCD or EL text or image display, voice guidance The user is urged to place the regular rechargeable battery unit 30 correctly.

  The current detection means 20 constantly monitors the current flowing through the primary coil and detects an overcurrent, that is, a predetermined current value set for each rechargeable battery unit 30. The detected current value for each rechargeable battery unit 30 and its allowable range are recorded in an information table (not shown) of the control information holding means 14. When an overcurrent is detected, power transmission is stopped, and the user is prompted to correctly place the regular rechargeable battery unit 30 by warning display, warning sound, display by characters or images, voice guidance, or the like.

  The placement detection unit 21 detects that not only the rechargeable battery unit 30 that is a target of power transmission but also any object is placed on the power supply device 10. The charging base of the power supply device 10 is assumed to be a flat plate such as a plate, and the mounting detection means 21 is based on the principle of operation used for an electronic measuring instrument, a touch panel, and the like. In addition, an electronic component that embeds an electronic component that detects the change using any one or a combination of piezoelectric, magnetostriction, ultrasonic, LED, laser, resistance, capacitance, temperature, or the like, and the object is placed Detect that. When temperature is used, it can function as a safety device for preventing heat generation, smoke generation, and ignition.

  The external communication means 22 is for newly registering or updating control information for power supply control corresponding to various rechargeable battery units 30 stored and stored in the control information holding means 14, firmware of the power supply apparatus 10, control program, user It is provided for updating application programs such as interfaces, and more specifically, a PLC (power line carrier) adapter function connected to a communication network via a commercial power supply, LAN, USB, IEEE 1394, IEEE 802.11. The information is obtained via a medium such as a wireless LAN such as IEEE 802.15, a wireless PAN such as IEEE 802.15, a communication medium conforming to a communication standard such as an IC card interface such as ISO18092 or ISO14443, or a medium such as a memory card.

  In the present embodiment, since the power supply device 10 generally requires an AC power supply, it is desirable to acquire control information and the like via the PLC. However, when the rechargeable battery unit 30 is a mobile phone, ad hoc communication Information can be exchanged via a wireless tag (RFID) interface such as ISO 18092 that can use the mode, short-range wireless communication such as IEEE 802.15, or USB. In the case of USB, information can be easily obtained and updated by connecting to a PC (personal computer). In addition, information can be acquired and updated more easily by installing a memory card interface.

  The control information update unit 23 is a unit that updates the control information of the power supply control unit 16 acquired through the external communication unit 22. The control information update unit 23 stores the power supply control information in the information table (not shown) of the control information holding unit 14. The rechargeable battery unit 30 manufactured as a new model and the revision of the rechargeable battery unit 30 can be supported by updating.

  Hereinafter, the present system will be described more specifically with reference to a configuration diagram according to an embodiment of the power transmission system of the present invention shown in FIG.

  The rechargeable battery unit 30 includes a wireless tag (RFID) that is supplied with electric power via an electromagnetic field and can read and rewrite information via electromagnetic waves, separately from the electric power transmission for charging, to the communication unit 31. As a wireless tag that does not require a built-in power supply, for example, a proximity type standardized as ISO / IEC15693 is used. As described above, instead of the wireless tag (RFID), it is possible to unify the communication unit 31 by one method using infrared communication or a proximity communication method by performing appropriate power supply control.

  The charging base of the power supply apparatus 10 may have any shape, but here, a flat charging base is assumed. Charging is performed by placing the rechargeable battery unit 30 on the charging stand. When the rechargeable battery unit 30 is placed on the power supply device 10, the ID (identification information) recorded in the wireless tag is read, and the information recorded in the memory in the power supply device 10, that is, in the control information holding means 14. The type or the like of the corresponding rechargeable battery unit 30 is specified with reference to a table (not shown).

  An electromagnetic induction method is used for power transmission from the power supply device 10 to the rechargeable battery unit 30, and a current that flows in the primary side coil (primary side power supply unit: power transmission unit in FIG. 2) 101 of the power supply device 10. The magnetic flux generated by the secondary coil (secondary power receiving unit: power receiving unit in FIG. 2) 301 of the rechargeable battery unit 30 passes through the secondary side (power receiving unit) coil 301 due to the change in the strength of the magnetic flux. Is utilized to generate an electromotive force (transformer coupling).

  For the communication means 31 for identifying and specifying the rechargeable battery unit 30, in this embodiment, a wireless tag system that does not require a power source is used on the rechargeable battery unit 30 side assuming that the capacity of the secondary battery 33 is empty. However, the identification information is superimposed on the electromagnetic field or electromagnetic wave when power is transmitted from the power supply device 10 to the rechargeable battery unit 30 by the electromagnetic induction method, in addition to using the infrared communication or the proximity communication method. Can also be realized.

  The AC voltage generated in the secondary side (power receiving unit) coil 301 by the electromagnetic induction type power transmission is rectified by the rectifying unit 302 (the power receiving unit 32 shown in FIG. 1), and the charging control unit 303 sets the appropriate voltage and current. The secondary battery 33 is charged in accordance with the charge control information while monitoring the state of charge so as to be maintained. The charging control unit 303 includes a DC / DC converter, and charges the secondary battery 33 by controlling the CPU and the charging control program or control logic so that appropriate voltage and current are supplied. The charging control unit 303 is an electromagnetic field or electromagnetic wave when power is transmitted from the charging unit 34, the charging control unit 36, the charging state monitoring unit 35, and the power supply device 10 shown in FIG. Charging control information transmitting means 39 for transmitting charging control information at the time of charging superposed on the charging control information. As an information superposition method, any method capable of realizing communication such as AM, PM, FM, ASK, FSK, or a method using a subcarrier may be used.

  In addition to processing related to charge control, the charge control unit 303 monitors the power reception state of the secondary side (power reception unit) by the received power monitoring unit 37 as shown in FIG. Receiving information transmitting means 38 for transmitting to the power supply apparatus 10 superimposed on an electromagnetic field or electromagnetic wave is provided. The feedback of the power reception information and the charging control information accompanying the power supply from the rechargeable battery unit 30 side to the power supply device 10 is not superimposed on the electromagnetic field or the electromagnetic wave at the time of power transmission. It is also possible to unify with one system using a communication system such as a mold.

  The ID authentication information transmitted by the communication means 31 of the rechargeable battery unit 30 is for identifying the rechargeable battery unit 30 in more detail and obtaining detailed information related to charging. Identification information transmitted at the initial stage of power transmission, That is, not only the information for identifying the rechargeable battery unit 30 used in a digital camera, a mobile phone, a notebook PC (personal computer), etc., but also the type, number of cells, voltage, maximum capacity, charge of the built-in secondary battery It is also used to specify rates and the like. The communication means 31 has a function of transmitting and receiving information on ID (identification information) and power supply and charging. The communication unit 31 also has a function of identifying the power supply device 10 on the rechargeable battery unit 30 side, and an acknowledge signal is returned in the communication procedure. If it is determined that the power supply device 10 is not suitable, such as a lever, it is not shown, but the user uses the regular power supply device 10 by warning display, warning sound, display with characters or images, voice guidance, etc. Prompt. In this embodiment, the communication unit 31 manages a communication function performed by being superimposed on an electromagnetic field or an electromagnetic wave when power is transmitted to the power supply apparatus 10.

  On the other hand, the power supply device 10 includes an ID transmission / reception unit 102 for reading the ID of the wireless tag transmitted by the communication unit 31 of the rechargeable battery unit and writing necessary information. It detects that the unit 30 has been placed and starts its operation. Of course, it is possible to determine that the rechargeable battery unit 30 is placed when the ID transmitter / receiver 102 is intermittently operated to save power consumption and the ID of the wireless tag can be read. The ID transmitting / receiving unit 102 includes the identification information reading unit 11 shown in FIG. The intermittent operation is performed not only for reading the wireless tag but also for placement detection to reduce standby power of the entire power supply apparatus 10. At that time, the sensing interval by the intermittent operation is changed according to the usage time, and when not used for a long time, the sensing interval is lengthened so that the standby power is reduced.

  The ID authentication / foreign matter detection unit 103 includes the determination units of the rechargeable battery unit identification unit 12, the placement detection unit 21, the coupling degree detection unit 18, the current detection unit 20, and the receipt information reception unit 15 illustrated in FIG. 1. The regular rechargeable battery unit 30 that is provided with the control information correcting means 19 and is subject to power transmission and charging from the ID of the wireless tag read by the ID transmitting / receiving unit 102 or other information transmitted through the communication means 31. If there is no response, or comparing the control information for power supply obtained with reference to an information table (not shown) recorded in advance and the actual control value, For example, when the degree of coupling or the current comparison value during actual power transmission is not within a predetermined range, a foreign object other than the rechargeable battery unit 30 or a rechargeable battery unit 30 that is not applicable, or that has not been correctly placed. It is determined that the.

  The current detection unit 104 includes the current detection unit 20 and the coupling degree detection unit 18 illustrated in FIG. 1, and always detects the current of the primary coil 101 and the coupling degree with the secondary coil 301. The value is monitored by the ID authentication / foreign matter detection unit 103, and the current value for each rechargeable battery unit 30 and the change value associated with charging are recorded in an information table (not shown). Determine abnormal conditions such as overcurrent detection. If it is determined that there is an abnormality, the user stops the power transmission and places the proper rechargeable battery unit 30 to be applied in the correct position by warning display, warning sound, text or image display, voice guidance, etc. Prompt. In addition, the current detection unit 104 also has a function of receiving various kinds of information accompanying the power supply transmitted from the rechargeable battery unit 30 via the electromagnetic wave and the primary side coil 101 when power is transmitted.

  The ID authentication / foreign matter detection unit 103 includes the control information correction unit 19 shown in FIG. The control parameter is updated and corrected so that the power supplied to the rechargeable battery unit 30 is the same. Further, the ID authentication / foreign matter detection unit 103 acquires the power reception information and the feedback control information of the charging control information transmitted from the rechargeable battery unit 30 via the ID transmission / reception unit 102. The acquired power reception information and charging control information are fed back to the control signal processing circuit 105 and reflected in the control parameters, whereby efficient charging and power transmission are performed.

  The control signal processing circuit 105 is a circuit that implements the power supply control means 16 shown in FIG. 1, and is based on the control parameter corrected, updated, and reflected by the ID authentication / foreign matter detection unit 103. 108 and the drive unit 109 are controlled and driven, and the drive current of the primary coil 101 is controlled. A plurality of primary coils 101 are provided as described above, and are controlled and driven by the corresponding driver control unit 108 and drive unit 109, and are optimal for the rechargeable battery unit 30 placed. The position drive unit 109 is selected to transmit power. In addition, since a plurality of driver control units 108 and drive units 109 that are independently controlled and driven are provided, a plurality of different or the same type of rechargeable battery units 30 can be driven substantially simultaneously by simultaneous, time-division, or a combination thereof. Can do.

  Identification of control information at the time of driving each rechargeable battery unit 30 is specific identification information for each rechargeable battery unit 30 held in advance in the ID authentication / foreign matter detection unit 103 (control information holding means 14 shown in FIG. 1), or The random number generated by the ID transmitting / receiving unit 102 can be used for each header information of a signal transmitted and received superimposed on power transmission. Reference numeral 106 denotes an AC / DC conversion circuit that generates a DC power source from an AC power source of a commercial power source. Reference numeral 107 denotes a DC for supplying a voltage suitable for each of the control circuit and the accompanying electronic circuit in the power supply apparatus 10. It is a power supply.

  Although not shown, the power supply apparatus 10 is an external interface for updating application programs such as new registration and update of control information for power supply control, firmware, control program, user interface (shown in FIG. 1). External communication means 22), and this information can be acquired via a communication network or the like. As a result, the rechargeable battery unit 30 manufactured as a new model or the rechargeable battery unit 30 can be dealt with. Further, since a USB connection terminal is provided as an external interface, it is possible to acquire information via a USB memory or a PC.

  Next, referring to an example of a flowchart of the power transmission method according to the embodiment of the present invention shown in FIG. 5, the secondary battery 33 in the rechargeable battery unit 30 is transmitted by transmitting power from the power supply device 10 to the rechargeable battery unit 30. A processing procedure on the side of the power supply apparatus 10 when charging is described. This flow chart describes a procedure when power is normally transmitted to one rechargeable battery unit 30, and is a procedure for transmitting power to a plurality of rechargeable battery units 30, and at the time of abnormality or error The processing is omitted. Further, it is assumed that the rechargeable battery unit 30 is identified by a wireless tag (RFID). A flowchart on the rechargeable battery unit 30 side is also omitted.

  When the power is turned on, the placement detection unit 21 of the power supply device 10 functions and waits for the rechargeable battery unit 30 to be placed on the charging stand of the power supply device 10. When it is detected that the rechargeable battery unit 30 is placed on the charging stand (step S11), the ID (identification) of the wireless tag (RFID) transmitted from the rechargeable battery unit 30 via the communication means 31 by the identification information reading means 11 is identified. Information) is read (step S12). Based on the read ID, the model of the rechargeable battery unit 30 having the ID is identified and specified by the rechargeable battery unit identifying means 12 (step S14).

  If there is no response, or if the ID cannot be read, such as when a NACK (Negative Acknowledgment) is received, it is determined that the object is not a foreign object or a suitable rechargeable battery unit 30 (step S13). As the abnormal processing, the user is prompted to correctly place the regular rechargeable battery unit 30 by, for example, warning display, warning sound, display by characters or images, voice guidance, or the like.

  When the rechargeable battery unit 30 is specified, the rechargeable battery unit identifying unit 12 refers to the information table of the control information holding unit 14 and acquires control information for power supply control for the corresponding rechargeable battery unit 30 (step) S15), the control parameters of the power supply control means 16 are set. The power supply control means 16 starts the initial power supply in accordance with the set control information, and the coupling degree detection means 18 detects the coupling degree between the primary side coil 101 and the secondary side coil 301 (step S16), and at the same time, the current Monitoring of the drive current of the primary coil 101 is started by the detection unit 104. At the time of initial power supply, the minimum power necessary for detecting the coupling degree is supplied. At that time, an optimal primary side coil is selected from the coupling degree and current value of the plurality of primary side coils 101 to transmit power.

  Although the drive current of the primary coil 101 is constantly monitored during power supply and is not shown in the drawing, if the current detection means 20 determines that the drive current exceeds the preset allowable value and is overcurrent, Stop supply and go to error handling. Further, the information on the degree of coupling is reflected as correction information for power supply control by the control information correction means 19 (step S17), and the power supplied to the rechargeable battery unit 30 is maintained even if the mounting state on the charging stand is slightly different. Although the corrections are made to be the same, if the preset allowable value is exceeded at that time, the power supply is stopped and the process proceeds to an abnormal process. When a plurality of rechargeable battery units 30 are placed, the procedure from step S11 to step S17 is sequentially performed in the same manner, or each step from step S12 to step S17 is alternately performed for each rechargeable battery unit 30. Or perform each step simultaneously in a time-sharing manner.

  When the control parameter for power supply is determined, power supply for the next stage suitable for the rechargeable battery unit 30 placed on the charging stand is started (step S18). Based on the current value of the primary coil 101 monitored by the current detection unit 104, the secondary battery 33 of the rechargeable battery unit 30 is charged to some extent, and a weight for a predetermined time when charging is assumed to be started is set ( The power reception information transmitted from the rechargeable battery unit 30 is started to be read by the reception information receiving means 15 (not shown) (step S20). If there is no response from the rechargeable battery unit 30, the supply of power and the subsequent processing are stopped and the process proceeds to an abnormal process (step S19).

  The read power reception information is reflected in the control parameters of the power supply control means 16 as needed (step S21), and the operation is continued until it is determined that the power reception state is normal (step S22). The determination as to whether or not the power supply state is normal is notified by the power reception information transmitted from the rechargeable battery unit 30, or is determined according to the control information in the information table registered in the power supply apparatus 10 in advance. In this embodiment, the power supply information of the power supply device 10 is notified by feedback from the rechargeable battery unit 30 while receiving power reception information, but the power supply information from the rechargeable battery unit 30 is not obtained. In consideration of the above, the power control is performed only on the power supply device 10 side while referring to the drive current of the primary coil 101 and the change in the coupling degree according to the control information for each rechargeable battery unit 30 stored in the power supply device 10. You may make it perform.

  When the control parameter for power supply is determined, the process proceeds to the next stage of power supply suitable for the rechargeable battery unit 30 placed on the charging stand (not shown), and the secondary battery 33 of the rechargeable battery unit 30 is changed. It is charged to some extent and the weight of the time when charge control information is assumed to be transmitted from the rechargeable battery unit 30 is set (not shown), and the charge control information receiving means 17 starts reading the charge control information ( Step S24). When there is no response from the rechargeable battery unit 30, the supply of electric power and the subsequent processing are stopped and the process proceeds to an abnormal process (step S23).

  The read charge control information is reflected on the control parameters of the power supply control means 16 as needed (step S25), and the operation is continued until it is determined that the charge is completed (step S26). The completion of charging is notified by the charging control information transmitted from the rechargeable battery unit 30, or is determined according to the control information in the information table registered in advance in the power supply apparatus. In the present embodiment, charging control information during charging is notified from the rechargeable battery unit 30 and power supply control of the power supply apparatus 10 is performed by feedback. However, when charging information from the rechargeable battery unit 30 cannot be obtained, etc. In consideration of the above, in accordance with the control information for each rechargeable battery unit 30 stored in the power supply device 10, power control is performed only on the power supply device 10 side while referring to the change in the driving current and coupling degree of the primary coil 101. You may do it.

  Moreover, in this embodiment, the power supply control at the time of transmitting power from the power supply device 10 to the rechargeable battery unit 30 is performed by feeding back the power receiving state and the charge state in the rechargeable battery unit 30 to the power supply device 10. However, in addition to the processing in the case where the above feedback information cannot be obtained, it is also possible to perform the feedback control in either the power receiving state or the charging state.

  Finally, with reference to a schematic configuration diagram of a power transmission system according to another embodiment of the present invention shown in FIG. 6, an embodiment targeting an electronic device 50 having no secondary battery other than the rechargeable battery unit 30 will be described. To do. Examples of the electronic device 50 that does not have a secondary battery include various types such as an LED type desk lamp, a spotlight, an electric decoration, and a tabletop fan mounted on a table in which the power supply device 10 is embedded. is assumed. Here, the same components as those in FIG. 1 are denoted by the same reference numerals, and description of overlapping functions is omitted.

  The electronic device 50 shown in FIG. 6 does not include the secondary battery 33, the charging unit 34, the charging control unit 36, the charging state monitoring unit 35, and the charging control information transmission unit 39, and instead, an electronic circuit or the like inside the electronic device 50 1 is different from the rechargeable battery unit 30 of FIG. 1 in that it includes a power supply unit 51 for supplying power to the battery. The electronic device 50 includes a communication unit 31 that transmits identification information by a wireless tag (RFID) or the like that can be read without an internal power source, as in FIG. 50 identification information is read, power supply control information corresponding to the electronic device 50 specified by the electronic device identification means 52 is referred to, and appropriate power is supplied from the power supply device 10 according to the control information. It is received by the power receiving means 32.

  The power receiving means 32 includes an electric double layer capacitor 40 that can rapidly charge the received electric power as it is even without a dedicated charging circuit, and the electric power charged in the electric double layer capacitor 40 is a power source. Accordingly, an appropriate voltage or current can be stably supplied from the power supply unit 51 to the electronic circuit or the like inside the electronic device 50.

  Since the electronic device 50 does not require charging control unlike the rechargeable battery unit 30, the power receiving state of the power received by the power receiving means 32, for example, the voltage or current supplied to the power supply unit 51, as corresponding to FIG. The received power monitoring means 37 for monitoring the power reception status, that is, the voltage and current of the monitored power is sent to the power supply apparatus 10 in real time as feedback information to the power supply apparatus 10 for feedback. The power supply device 10 can supply power to the electronic device 50 appropriately and safely. As in the case of the rechargeable battery unit 30, the power reception information is superimposed on the electromagnetic field or electromagnetic wave during power transmission, or by using a communication method such as infrared communication or proximity type, thereby realizing electronic communication by realizing bidirectional communication. 50 and the power supply device 10 are transmitted and received.

  The power reception information monitored by the received power monitoring unit 37 and transmitted by the reception information transmission unit 38 is received by the reception information reception unit 15 of the power supply apparatus 10 and fed back to the power supply control unit 16 to be electronically transmitted in almost real time. The power supplied to the device 50 is controlled. The receipt information receiving means 15 has substantially the same role as that of the rechargeable battery unit 30 of FIG. Other means in the power supply apparatus 10 have the same functions as those in FIG. Since the power supply control means 16 of the power supply apparatus 10 can drive a plurality of coils simultaneously or substantially simultaneously by time division or the like and control them independently as described above. A plurality of electronic devices 50 can be supplied with power simultaneously or substantially simultaneously. Furthermore, when the rechargeable battery unit 30 as shown in FIG. 1 has a charging means as one embodiment, not only the combination in the case of not having the charging means as shown in FIG. Even when the embodiments are combined, power can be transmitted and supplied to the plurality of electronic devices 50 simultaneously or substantially simultaneously.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical scope of the present invention.

It is a schematic block diagram of the rechargeable battery unit by one Embodiment of this invention, and the electric power supply apparatus used for this. It is a block diagram by one Example of the power transmission system of this invention. It is explanatory drawing of the circuit structure which changes the load of the secondary side coil of a rechargeable battery unit. It is a block diagram which shows the shape and arrangement | positioning of the primary side coil of a rechargeable battery unit. FIG. 3 is a flowchart of a power transmission method according to an embodiment of the present invention. It is a schematic block diagram of the electric power transmission system by other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Power supply apparatus 11 Identification information reading means 12 Rechargeable battery unit identification means 13 Power supply means 14 Control information holding means 15 Receiving information receiving means 16 Power supply control means 17 Charging control information receiving means 18 Coupling degree detecting means 19 Control information correcting means 19 DESCRIPTION OF SYMBOLS 20 Current detection means 21 Mounting detection means 22 External communication means 23 Control information update means 30 Rechargeable battery unit 31 Communication means 32 Power receiving means 33 Secondary battery 34 Charging means 35 Charging state monitoring means 36 Charging control means 37 Received power monitoring means 38 Receipt Information Transmitting Means 39 Charging Control Information Transmitting Means 40 Electric Double Layer Capacitor 50 Electronic Device 51 Power Supply Unit 52 Electronic Device Identification Unit 101 Primary Coil (Power Transmission Unit)
DESCRIPTION OF SYMBOLS 102 ID transmission / reception part 103 ID authentication and a foreign material detection part 104 Current detection part 105 Control signal processing circuit 106 AC / DC conversion circuit 107 DC power supply 108 Driver control part 109 Drive part 301 Secondary coil (power reception part)
302 Rectifier 303 Charge controller

Claims (20)

A rechargeable battery unit that is mounted on an electronic device and charged by being supplied with electric power from a power supply device without contact,
Communication means including at least identification information for specifying the battery unit, and performing transmission and reception of information associated with power transmission with the power supply device using a radio signal;
Power receiving means for receiving power from the power supply device in a contactless manner;
A secondary battery for storing the power received by the power receiving means;
Charging means for charging the secondary battery with the power received by the power receiving means;
Charge state monitoring means for monitoring a charge state of the secondary battery;
Charging control means for controlling the charging means in accordance with the monitored charging state of the secondary battery;
A received power monitoring means for monitoring a power receiving state received by the power receiving means;
Receiving information transmitting means for transmitting power receiving information for appropriately controlling the monitored received power corresponding to the rechargeable battery unit to the power supply apparatus via the communication means. Rechargeable battery unit.   Charge control information for controlling the power supplied from the power supply device according to the charge state of the secondary battery monitored by the charge state monitoring means is transmitted to the power supply device via the communication means. The rechargeable battery unit according to claim 1, further comprising charging control information transmitting means.   The communication means is performed by any one or more communication methods selected from short-range wireless communication, infrared communication, and communication performed via an electromagnetic field or electromagnetic wave during power transmission. The rechargeable battery unit according to claim 1. An electric double layer capacitor capable of rapid charging at a charging rate at which the charging capacity is twice or more per unit time with respect to the secondary battery;
The charging means includes a first charging means for charging the electric double layer capacitor with the electric power received by the electric power receiving means, and an electric power of the electric double layer capacitor charged by the first charging means to the secondary battery. The rechargeable battery unit according to claim 1, further comprising: a second charging unit that charges the battery. A system for transmitting and supplying power without contact from a power supply device to a rechargeable battery unit mounted on an electronic device,
The rechargeable battery unit is
Communication means that includes at least identification information for specifying the rechargeable battery unit, and exchanges information associated with power transmission with the power supply device using a radio signal;
Power receiving means for receiving power from the power supply device in a contactless manner;
A secondary battery for storing the power received by the power receiving means;
Charging means for charging the secondary battery with the power received by the power receiving means;
Charge state monitoring means for monitoring a charge state of the secondary battery;
Charging control means for controlling the charging means in accordance with the monitored charging state of the secondary battery; received power monitoring means for monitoring a power receiving state received by the power receiving means;
Receiving information transmitting means for transmitting power receiving information for appropriately controlling the monitored received power corresponding to the rechargeable battery unit to the power supply device via the communication means,
The power supply device
Identification information reading means for reading the identification information transmitted from the rechargeable battery unit via the communication means;
Rechargeable battery unit identification means for reading the identification information of the rechargeable battery unit by the identification information reading means and identifying the rechargeable battery unit;
Power supply means for supplying power to the rechargeable battery unit in a contactless manner;
Control information holding means for holding power supply control information for each rechargeable battery unit corresponding to the identification information;
Receiving information receiving means for receiving power receiving information transmitted from the rechargeable battery unit via the communication means;
And a power supply control unit configured to control the power supply unit based on the power supply control information and the power supply information to supply power suitable for the corresponding rechargeable battery unit. The rechargeable battery unit communicates charge control information for controlling power supplied from the power supply device to the power supply device according to a charge state of the secondary battery monitored by the charge state monitoring means. Charging control information transmitting means for transmitting via the means,
The power supply device further includes charge control information receiving means for receiving charge control information transmitted from the rechargeable battery unit via the communication means,
6. The power transmission system according to claim 5, wherein the power supply control unit controls supply power of the power supply unit based on the power supply control information, the power reception information, and the charge control information. .   The communication means is performed by any one or more communication methods selected from short-range wireless communication, infrared communication, and communication performed via an electromagnetic field or electromagnetic wave during power transmission. The power transmission system according to claim 5. The rechargeable battery unit is
An electric double layer capacitor capable of rapid charging at a charging rate at which the charging capacity is twice or more per unit time with respect to the secondary battery;
The charging means includes a first charging means for charging the electric double layer capacitor with the electric power received by the electric power receiving means, and an electric power of the electric double layer capacitor charged by the first charging means to the secondary battery. The power transmission system according to claim 5, further comprising second charging means for charging. The power supplied by the power supply means is transmitted by electromagnetic induction between a primary power supply unit of the power supply device and a secondary power supply unit of the rechargeable battery unit,
The power transmission system according to claim 5, wherein the power supply device further includes a coupling degree detection unit that detects a coupling degree between the primary side power supply unit and the secondary side power reception unit. .   10. The coupling degree detection unit detects the change based on a change in one or more characteristics selected from power consumption, frequency characteristics, and phase characteristics of the primary power supply unit. The power transmission system described in 1. The battery unit includes means for changing a load state of the secondary power receiving unit,
The power transmission system according to claim 9, wherein the coupling degree detection unit detects the change based on a change in characteristics of the primary power supply unit according to a change in a load state of the secondary power reception unit. .   The power supply device is a control information correction unit that corrects control information of the power supply control unit based on a coupling degree between the primary power supply unit and the secondary power reception unit detected by the coupling degree detection unit. The power transmission system according to claim 9, further comprising:   The power supply device has a plurality of drive units that can be controlled and driven independently of each other on the primary side power supply unit, and the coupling degree detection means is based on the coupling degree of the respective driving units. The power transmission system according to claim 9, wherein a drive unit that supplies power to the rechargeable battery unit is selected.   In the power supply device, a plurality of the rechargeable battery units are specified by the identification information reading unit and the rechargeable battery unit identifying unit, and the coupling degree of the driving unit detected by the coupling degree detecting unit is the plurality of rechargeable battery units. The power transmission system according to claim 9, wherein power is transmitted and supplied to the plurality of rechargeable battery units in a time-sharing manner when the power is within a predetermined range. The power supplied by the power supply means is transmitted by electromagnetic induction between a primary power supply unit of the power supply device and a secondary power supply unit of the rechargeable battery unit,
The power transmission system according to claim 5, wherein the power supply device further includes a current detection unit that detects a current of the primary power supply unit.   The power supply device may be selected from voltage, current, resistance value, capacitance, magnetic flux, pressure, sound, light, and temperature that an object is placed on the power supply device. The power transmission system according to claim 15, further comprising a placement detection unit that detects the change based on the above change. The power supply device
An external communication means for exchanging information with an external device;
6. The power transmission system according to claim 5, further comprising control information updating means for receiving and updating power supply control information of the control information holding means via the external communication means. It is a method of transmitting and supplying power from a power supply device in a contactless manner to a rechargeable battery unit comprising a communication means that has identification information and transmits / receives information using a radio signal, a secondary battery, and a charging unit thereof. And
A rechargeable battery unit identification stage that reads the identification information of the rechargeable battery unit via the communication means and identifies the rechargeable battery unit;
Charge control information for monitoring the charge state of the secondary battery and controlling the supply power of the power supply device according to the charge state is transmitted from the rechargeable battery unit to the power supply device via the communication means. Charging control information transmission stage;
A charging control information receiving step of receiving the charging control information from the rechargeable battery unit via the communication means in the power supply device;
A power supply control step for controlling power supplied to the rechargeable battery unit based on the power supply control information for each rechargeable battery unit specified by the identification information and the charge control information received in the charge control information reception step; A power transmission method comprising:   When the identification information cannot be read at the rechargeable battery unit identification stage and the rechargeable battery unit cannot be specified, the subsequent processing is stopped and the user is alerted at least by sound or display output. The power transmission method according to claim 18. The power supply from the power supply device to the rechargeable battery unit is performed by electromagnetic induction between the primary power supply unit of the power supply device and the secondary power supply unit of the rechargeable battery unit,
A coupling degree detection step of detecting a coupling degree between the primary side power supply unit and the secondary side power reception unit;
If the value obtained by comparing the coupling degree detected in the coupling degree detection step and the coupling degree of the power supply control information specified for each rechargeable battery unit is not within a predetermined range, the power supply is stopped and at least sound The power transmission method according to claim 18, wherein the user is alerted by either display output or display output.

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