WO2013031054A1 - 充電システム、電子機器、充電制御方法及びプログラム - Google Patents
充電システム、電子機器、充電制御方法及びプログラム Download PDFInfo
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- WO2013031054A1 WO2013031054A1 PCT/JP2012/002855 JP2012002855W WO2013031054A1 WO 2013031054 A1 WO2013031054 A1 WO 2013031054A1 JP 2012002855 W JP2012002855 W JP 2012002855W WO 2013031054 A1 WO2013031054 A1 WO 2013031054A1
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- power
- secondary battery
- charging
- power transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/448—End of discharge regulating measures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a contactless charging system, an electronic device, a charging control method, and a program.
- the contactless charging system sends power from one device to the second device to charge the power of the second device or charges the battery (secondary battery) of the second device. It is widely used for various electronic devices that operate.
- one device is referred to as “power transmission side” and the second device is referred to as “power reception side”
- coils are provided on the power transmission side and the power reception side, respectively. These coils correspond to the primary and secondary coils of the transformer, as it were. That is, when an alternating current flows in the coil on the power transmission side (primary coil), the induced current is converted to a direct current using the principle of electromagnetic induction coupling that the current is induced in the coil on the power reception side (secondary coil). Power supply and charging of the secondary battery.
- Overcharging means that the internal reaction (chemical reaction) of the battery exceeds the reversible region and reaches the irreversible region. In the irreversible area, battery deterioration rapidly progresses. Therefore, generally, there is provided a function of detecting a state before the overcharge (full charge state) and preventing further charging.
- Patent Document 1 discloses a related technique for stopping normal power transmission to the power receiving side when power is fully charged, and performing power saving power transmission using power lower than power at normal power transmission. ing. According to this, while overcharging can be prevented, the amount of natural discharge of the secondary battery can be replenished by low power transmission (power save transmission), and power on the receiving side during operation (for example, portable The standby power of the telephone can be provided.
- Patent Document 2 causes the power transmission operation on the power transmission side to be started at a predetermined timing when recharging operation is performed after the secondary battery is fully charged, and the power transmission coil is started after the power transmission operation is started.
- the secondary battery can be recharged every predetermined timing (for example, several hours).
- Patent Document 3 also stops power transmission from the power transmission side (charging stop) in response to a full charge command indicating charge completion transmitted from the power receiving side to the power transmission side, and in the charge stop state, the power receiving side
- a related art has been disclosed that transmits a charge restart confirmation command to a power receiving side to confirm whether recharging is required or not. According to this, while overcharging can be prevented, a required command (charging / restarting confirmation command) can be transmitted to the power receiving side to check whether or not recharging is necessary, and recharging can be performed if necessary. .
- the related art of command transmission exchanged between the power receiving side and the power transmitting side is disclosed, for example, in Patent Document 3, Patent Document 4, Patent Document 5, etc.
- the principle is that the power transmitting coil and the power receiving
- the electrical characteristics of one of the side coils are modulated with the required data. For example, when transmitting a full charge command from the power receiving side to the power transmitting side, modulating the electrical characteristics of the power receiving side coil with data of the command, or transmitting a charging restart confirmation command from the power transmitting side to the power receiving side Modulates the electrical characteristics of the power transmission coil with the data of the same command. In any case, the corresponding command can be detected (received) from the change in the current induced in the other coil.
- the power transmitting side and the power receiving side Must be kept.
- the predetermined positional relationship means a positional relationship capable of causing electromagnetic induction, and generally means that the power receiving side is placed on the power transmitting side.
- Patent Document 6 discloses a related technique for detecting that the power receiving side is placed on the power transmission side. According to this, it can be recharged by detecting that the power transmission side and the power reception side are in a predetermined positional relationship.
- the moving coil type charging system is one in which the coil on the power transmission side is movable (a mechanism that can move actively), and the power transmission side The position on the power reception side placed on the power receiving side is detected, and the coil is moved to the mounting position for power transmission, and after full charge, the coil is returned to the home position (initial position).
- the number of the power receiving side placed on the power transmission side can be plural, it is possible to obtain a highly versatile charging system.
- JP 2008-206232 A JP 2008-236968 A JP, 2010-035417, A JP, 2010-246292, A Unexamined-Japanese-Patent No. 2010-252517 JP 2011-010384 A JP, 2009-247194, A JP, 2010-263663, A
- an object of the present invention is to provide a charging system, an electronic device, a charging control method, and a program that are also applicable to a moving coil charging system.
- the charging system of the present invention includes a power transmission unit including a power transmission coil, and a power reception unit including a power reception coil that can be coupled to the power transmission coil by electromagnetic induction, the power transmission unit including the power transmission coil.
- Power transmission means for driving the power transmission coil to transmit power to the power reception coil when the power reception coil is positioned near the power reception coil, and command reception means for receiving a predetermined command transmitted from the power reception unit And stop means for stopping the power transmission operation of the power transmission means when the predetermined command is received, and the power reception unit charges the secondary battery using the current induced in the power reception coil.
- Charging means a full charge state determination means for monitoring the charge state of the secondary battery to determine whether or not the battery is fully charged, and the charge when the full charge state is determined by the full charge state determination means hand
- the command transmission means for transmitting the predetermined command to the power transmission unit while stopping the charging operation of the secondary battery, and the recharging of the secondary battery while the charging of the secondary battery is stopped.
- Recharging judgment means for judging whether or not it is in a necessary state, and separating the power receiving coil from the circuit temporarily when it is judged by the recharging judgment means to be in a state requiring recharging And means.
- the electronic device includes a power reception coil that can be coupled to a power transmission coil of a power transmission unit by electromagnetic induction, a charging unit that charges a secondary battery using a current induced in the power reception coil, and the secondary battery
- Fully charged state determination means for monitoring whether or not the battery is fully charged, and charging the secondary battery with respect to the charging means when the fully charged state is determined by the fully charged state determination means
- Command transmission means for transmitting a command instructing the power transmission unit to stop power transmission while stopping the operation, and recharging of the secondary battery is required while the charging of the secondary battery is stopped.
- Recharging determination means for determining whether or not in a state; and separating means for temporarily disconnecting the power receiving coil from the circuit when the recharging determination means determines that recharging is necessary. Equipped with And wherein the door.
- a charging step of charging a secondary battery using a current induced in a power receiving coil, and a full charge state monitoring of the secondary battery to determine whether or not it is fully charged When the fully charged state is determined by the state determination step and the fully charged state determination step, the charging operation of the secondary battery is stopped for the charging step, and power transmission to the power transmission unit is stopped.
- a program according to the present invention is charging means for charging a secondary battery using a current induced in the power reception coil in a computer of a power reception unit having a power transmission coil of the power transmission unit and a power reception coil coupleable by electromagnetic induction.
- a fully charged state determination unit that monitors the charge state of the secondary battery to determine whether or not the battery is fully charged; and when the fully charged state is determined by the fully charged state determination unit, secondary to the charging unit Command transmission means for stopping the charging operation of the battery and transmitting a command instructing the power transmission unit to stop the power transmission, and while the charging of the secondary battery is stopped, the secondary battery is recharged.
- Recharging determination means for determining whether the required state is present or not, the power receiving coil is temporarily disconnected from the circuit when it is determined by the recharging determination means that recharging is required. Characterized in providing a function as a means release Ri.
- FIG. 2 is a conceptual block diagram of an array sensor coil 6;
- FIG. 2 is a configuration diagram of a power transmission unit 2 and a power reception unit 3;
- FIG. 2 is a block diagram of a power receiving circuit 18; It is a figure which shows the schematic operation
- FIG. 5 is a configuration diagram of Supplementary Note 1.
- FIG. 1 is an external view of a moving coil type charging system.
- a movable coil type charging system 1 is configured by a power transmission unit 2 and at least one power reception unit 3.
- the power transmission unit 2 corresponds to the “power transmission side” at the beginning
- the power reception unit 3 corresponds to the “power reception side” at the beginning.
- the power receiving unit 3 is an arbitrary electronic device that operates with a secondary battery, and is, for example, a mobile phone such as a smartphone, but is not limited to this. It may be an electronic device compatible with a contactless charging system and a moving coil charging system.
- the power transmission unit 2 may be read as a charger or a charging stand.
- the power transmission unit 2 includes a rectangular plate 5 for mounting the power reception unit 3 on the main surface (the upper surface as viewed in the drawing) of the flat box-like housing 4, and this plate 5 receives power. It has an appropriate size to such an extent that a plurality of portions 3 can be placed side by side.
- the mounting position of the power receiving unit 3 mounted on the plate 5 (precisely, the position of the coil 14.
- the mounting position of the power receiving unit 3) will be described.
- Detection means are provided for detecting. This detection means can be configured, for example, by the array sensor coil 6.
- FIG. 2 is a conceptual block diagram of the array sensor coil 6.
- the array sensor coil 6 comprises n horizontal coils 7 to 9 arranged parallel to the horizontal side of the plate 5 and m horizontal coils arranged parallel to the longitudinal side of the plate 5. It is configured by arranging the longitudinal direction coils 10 to 12 in a cross shape.
- the mounting position of the power receiving unit 3 can be detected from the change of the drive current. For example, when a predetermined current change is detected when a pair of coil 8 and coil 12 is driven, the position of intersection of the coil 8 and coil 12 (portion A in the figure) It can be detected as a placement position.
- the power transmission unit 2 includes the array sensor coil 6 on the lower surface side of the plate 5, and further includes the movable power transmission coil 13 (hereinafter simply referred to as the power transmission coil 13). Have.
- the power receiving unit 3 further includes a power reception coil 14 (hereinafter, simply referred to as a power reception coil 14) fixed in position.
- the power transmission coil 13 can be freely moved in the longitudinal side direction (y-axis direction) and the lateral side direction (x-axis direction) of the plate 5 and the mixed direction thereof by a drive mechanism (not shown).
- the home position of the power transmission coil 13 is a predetermined position determined in advance, for example, the position of the lower left corner of the plate 5.
- the power transmission coil 13 detects the mounting position of the power reception unit 3 by the array sensor coil 6. When it is done, it moves from its home position to its mounting position.
- FIG. 3 is a configuration diagram of the power transmission unit 2 and the power reception unit 3.
- the power transmission unit 2 includes the array sensor coil 6 and the power transmission coil 13, and further includes a power supply circuit 15, a power transmission circuit 16, and a control circuit 17.
- the function of each part of the power transmission unit 2 is as follows.
- the power supply circuit 15 has a function of generating various power supply voltages necessary for the power transmission operation based on a commercial power supply.
- the various power supply voltages include the operating voltage of each part, the power for moving the power transmission coil 13, the transmission power sent to the power receiving unit 3 through the power transmission coil 13, the drive power of the array sensor coil 6, etc. .
- the power transmission circuit 16 drives the array sensor coil 6 to detect whether or not the power receiving unit 3 is placed on the plate 5, and when the detection result is positive, the mounting position of the power receiving unit 3 is The first function to be detected, the second function to move the power transmission coil 13 from the home position to the mounting position of the power receiving unit 3, and to return the power transmission coil 13 to the home position after charging is completed Receive the third function to send power to the power receiving unit 3 by driving the power transmission coil 13 moved to the mounting position 3 and the charge stop command (or full charge state command) appropriately sent from the power receiving unit 3 And a fourth function.
- Control circuit 17 The control circuit 16 is a control element of a program control method mainly composed of a computer, and controls the power supply circuit 15 and the power transmission circuit 16 to execute the function of each part according to a control program set in advance.
- the power receiving unit 3 includes the power receiving coil 14 described above, and further, the power receiving circuit 18, the charging circuit 19, the secondary battery 20, the baseband signal circuit 21, the wireless transmission / reception circuit 22, and the controller And 23.
- the function of each part of the power reception unit 3 is as follows.
- the power receiving circuit 18 rectifies the current induced in the power receiving coil 14 and converts it into a DC voltage, and the first function of supplying the DC voltage to the charging circuit 19 and the charging stop appropriately sent from the charging circuit 19 In addition to the second function of modulating the electrical characteristics of the power reception coil 14 in response to the signal (or full charge signal) and transmitting a charge stop command (or full charge command) to the power transmission unit 2; Furthermore, it has a third function of electrically disconnecting the power reception coil 14 from the charging circuit 18 at a predetermined timing.
- FIG. 4 is a block diagram of the power receiving circuit 18. As shown in this figure, the power receiving circuit 18 includes a separating means 24 and a resonant circuit 25.
- the resonant circuit 25 is an implementation element of the second function
- the separation means 24 is an implementation element of the third function.
- the resonant circuit 25 includes, for example, a first capacitor 25a connected to one end of the power reception coil 14, and a second capacitor 25b and a switch 25c inserted between one end of the first capacitor 25a and the ground. Is configured.
- the electrical characteristics of the power reception coil 14 can be changed by turning on and off the switch 25 c, and the power reception coil is controlled by a required command (charge stop command or full charge command) by controlling the on / off cycle of the switch 25 c.
- the 14 electrical characteristics can be modulated (the realization of the second function).
- the disconnecting means 24 can, for example, consist of switch elements inserted in series in the coil 24.
- the switch element may be any element that turns on and off in response to the control signal C.
- a mechanical relay or a transistor switch can be used.
- the disconnecting means 24 is turned on when the control signal C is inactive (non disconnecting instruction), and both ends of the power receiving coil 14 are connected to the power receiving circuit 18, but when the control signal C is active (disconnecting instruction), In the OFF state, one end of the power reception coil 14 (the end on the side where the separation means 24 is inserted) is electrically disconnected, and the connection with the power reception circuit 18 is disconnected (realization of the third function).
- the power reception coil 14 in the separated state no longer functions as a "coil” (function like a secondary coil of a transformer).
- the circuit 16 does not detect the placement of the power receiving unit 3. More specifically, even if the power reception unit 3 is actually mounted on the plate 5 of the power transmission unit 2, the power reception unit 3 from which the power reception coil 14 is separated is, so to speak, a mere box having lost the power reception function. In this case, the power transmission circuit 16 of the power transmission unit 2 does not detect the presence (that is, placement) of the power reception unit 3 in this case, and determines that the power reception unit 3 has been removed from the plate 5 as if .
- the contactless charging system charging is started when the power receiving unit 3 is placed on the power transmission unit 2, and when the placed state is released (that is, when the power receiving unit 3 is removed), charging is stopped. Then, when the power receiving unit 3 is placed on the power transmission unit 2 again, the charging is started, and when the placed state is released, the operation of stopping the charging is repeated until the fully charged state is reached.
- the start and stop of charging in the contactless charging system can be performed only by a simple operation of mounting and removing the power receiving unit 3.
- the separation means 24 is an element for performing such an operation in a pseudo manner. That is, when the separation unit 24 is turned on (the control signal C is inactive), the power receiving unit 3 is placed, and when the separation unit 24 is turned off (the control signal C is inactive), power reception is performed. This is because the part 3 has been removed, and the placement and removal of the power receiving part 3 can be reproduced by the on / off control of the separating means 24. However, it should be noted that this removal is "simulated”. Actually, although the power receiving unit 3 is placed on the plate 5 of the power transmission unit 2, since the power receiving coil 14 is electrically separated, it is considered as being “removed”. is there.
- the charging circuit 19 monitors the state of charge of the first battery charging the secondary battery 20 with the power from the power receiving circuit 18 and the state of charge of the secondary battery 20, and detects the fully charged state before the overcharge.
- the charging circuit 19 includes a control circuit 19a configured by a computer of a program control system that executes a control program set in advance.
- the secondary battery 20 is a chargeable power supply element for supplying operating power to each unit (the power receiving circuit 18, the charging circuit 19, the secondary battery 20, the baseband signal circuit 21, the wireless transmitting / receiving circuit 22, and the controller 23)
- a battery such as a NiCad.
- the baseband signal circuit 21 is a load element that operates by receiving power from the secondary battery 20 together with the wireless transmission / reception circuit 22 and the controller 23.
- These load elements (the baseband signal circuit 21, the wireless transmission / reception circuit 22, the controller 23) is, for example, a case where the power receiving unit 3 is a mobile phone such as a smartphone. That is, the baseband signal circuit 21 generates and outputs the voice signal of the portable telephone as a baseband signal, and the wireless transmission / reception circuit 22 places the baseband signal on a predetermined high frequency signal to generate a space from the antenna 22a. Also, it radiates and demodulates the high frequency signal received by the antenna 22a into a baseband signal and outputs it to the baseband signal circuit 21.
- controller 23 is a control element of a program control method mainly composed of a computer, and generally controls operations necessary for the mobile phone in accordance with a control program set in advance.
- these loading elements are not limited to those shown. It may be any load element conforming to the function of the power reception unit 3.
- FIG. 5 is a diagram showing a schematic operation flow of the embodiment.
- the flow on the left side shows the operation flow of the power transmission unit 2
- the flow on the right side shows the operation flow of the power reception unit 3.
- thick arrows connecting the left and right flows indicate signal delivery or state delivery from one flow to the other.
- both the power transmission unit 2 and the power reception unit 3 are in the non-charging state (step S101, step S201). That is, the power transmission unit 2 is in the power transmission standby state, and the power reception unit 3 is in the power off state or in a predetermined standby state (in the case of a mobile phone, a call reception standby state). At this time, the two are at separate places, and the power reception unit 3 is not placed on the plate 5 of the power transmission unit 2. During this time, the power transmission unit 2 continuously determines whether the power reception unit 3 is placed on the plate 5 (step S102).
- step S102 When the result of the determination in step S102 is "YES", that is, when it is determined that the power receiving unit 3 is placed on the plate 5 of the power transmitting unit 2, the power transmitting unit 2 sets the array sensor coil 6 The driving position is detected to detect the mounting position of the power receiving unit 3, and the power transmission coil 13 is moved to the mounting position (step S103), and charging is started (step S104).
- the power receiving unit 3 DC converts the current induced in the power receiving coil 14 with the disconnecting means 24 turned on, and starts the charging operation of the secondary battery 20 using the DC voltage (step S202) ). Thereafter, the power receiving unit 3 monitors the state of charge of the secondary battery 20 and determines whether or not the state of charge is fully charged (step S203).
- step S204 A charge stop command (or a full charge command) is transmitted (step S204).
- the power transmission unit 2 stops the charging operation for the power reception unit 3 (step S105), and returns the power transmission coil 13 to the home position (step S106).
- the power transmission unit 2 determines the removal of the power receiving unit 3 (step S107), repeats step S105 and subsequent steps when not determining removal, and returns to step S101 when determining removal. repeat.
- the power receiving unit 3 operates in a state requiring recharging, that is, a state in which natural discharge of the secondary battery 20 has progressed, or a load element (baseband signal circuit that operates by receiving power supply from the secondary battery 20). 21. It is determined whether or not the charge amount of the secondary battery 20 is reduced by the power consumption of the wireless transmission / reception circuit 22 and the controller 23) (step S205), and it is determined that recharging is necessary. If it is determined (“YES" determination in step S205), the control signal C is made inactive to be active and the separating means 24 is turned off (step S206), and then the control signal C is made inactive from being separated The operation of turning on the means 24 again (step S207) is performed.
- control signal C is changed from inactive to active and the separating unit 24 is turned off (step S206) when the power receiving unit 3 determines a state requiring recharging (“YES” determination in step S205). After that, the control signal C is again switched from active to inactive to turn on the separating means 24 (step S207). This point allows recharging without requiring a special command (recharging command).
- the power reception coil 14 can be electrically separated by turning the separation means 24 off, and the state in which the power reception unit 3 is removed from above the plate 5 of the power transmission unit 2 can be simulated in a pseudo manner. Furthermore, by turning on the disconnecting means 24, the connection of the power reception coil 14 can be restored and the separated state can be released, and the power reception unit 3 is placed on the plate 5 of the power transmission unit 2 This is because the state can be simulated in a pseudo manner, and the operation of charging start of the power transmission unit 2 (step S105) can be resumed by these pseudo reproductions (removal ⁇ placement).
- the advantage is obtained that the command for recharging is not required, whereby the power transmitting unit 2 and the power receiving unit 3 do not have to have the function of transmitting / receiving the recharging command, and the configuration is simplified. It is possible to obtain the remarkable merit of being able to
- the present invention can be applied not only to the moving coil charging system as in the embodiment but also to the non-moving coil charging system (charging system in which the coil of the power transmission unit does not move). This is because all charging systems start charging only by placing the power receiving unit on the power transmission unit.
- the power receiving unit 3 when the power receiving unit 3 is placed on the power transmission unit 2 as in the above embodiment, the power receiving unit 3 is placed in response to the placement. The position is detected, and the power transmission coil 13 is moved to the mounting position to start charging, but charging and recharging are similarly performed when the removal of the power receiving unit 3 and mounting are performed in a pseudo manner. Because it starts).
- the configuration can be simplified by eliminating the command for recharging, and the versatility can be widely applied to the non-contact type charging system regardless of the moving coil type or the non-moving coil type. Can provide superior technology.
- the moving coil type charging system has been described as an example, the concept of the embodiment is also applicable to a non-moving coil type charging system, that is, to a charging system in which the coil of the power transmission unit does not move. It goes without saying that it is applicable.
- the power receiving unit 3 is not limited to a mobile phone such as a smartphone.
- the electronic device may be any electronic device compatible with the charging system of the contactless type and provided with any load element operated by the secondary battery 20.
- recharging after full charge is performed, the present invention is not limited to this. For example, recharging after charge stoppage (resumption of charge) due to abnormality in charge operation (such as temperature abnormality of secondary battery) It may be.
- FIG. 6 is a block diagram of Supplementary Note 1.
- Appendix 1 is A power transmission unit 101 (corresponding to the power transmission unit 2 of the embodiment) including the power transmission coil 100 (corresponding to the power transmission coil 13 of the embodiment), and a power reception coil 102 (which can be coupled to the power transmission coil 100 by electromagnetic induction)
- a power reception unit 103 (corresponding to the power reception unit 3 of the embodiment) including the power reception coil 14 of the embodiment;
- the power transmission unit 101 is A power transmission unit 104 (corresponding to the transmission circuit 16 of the embodiment) which drives the power transmission coil 100 to transmit power to the power reception coil 102 when the power reception coil 102 is positioned near the power transmission coil 100.
- Command receiving means 105 (corresponding to the power transmission circuit 16 of the embodiment) for receiving a predetermined command transmitted from the power reception unit 103; And stop means 106 (corresponding to the control circuit 17 of the embodiment) for stopping the power transmission operation of the power transmission means 104 when the predetermined command is received,
- the power receiving unit 103 Charging means 108 (corresponding to the charging circuit 19 of the embodiment) for charging the secondary battery 107 (corresponding to the secondary battery 20 of the embodiment) using the current induced in the power reception coil 102;
- a fully charged state determination unit 109 (corresponding to the control circuit 19a of the embodiment) which monitors the charged state of the secondary battery 107 and determines whether or not the battery is fully charged; When the fully charged state is determined by the fully charged state determination unit 109, the charging operation of the secondary battery 107 is stopped for the charging unit 108, and the predetermined command is transmitted to the power transmission unit 101.
- Command transmitting means 110 (corresponding to the control circuit 19a of the embodiment); Recharging determination means 111 (corresponding to the control circuit 19a of the embodiment) which determines whether or not recharging of the secondary battery 107 is required while the charging of the secondary battery 107 is stopped; And a disconnecting means 112 (corresponding to the disconnecting means 24 in the embodiment) for temporarily disconnecting the power receiving coil 102 from the circuit when it is determined by the recharging determining means 111 that it is necessary to be recharged
- the charging system 113 (corresponding to the charging system 1 of the embodiment) is characterized.
- Appendix 2 is 5. The charging system according to claim 1, wherein the power transmission coil is a movable coil that moves to a position of the power reception coil.
- Appendix 3 is A power transmission coil of the power transmission unit and a power reception coil that can be coupled by electromagnetic induction; Charging means for charging a secondary battery using the current induced in the power reception coil; Fully charged state determination means for monitoring the charged state of the secondary battery to determine whether or not the battery is fully charged; When the fully charged state is determined by the fully charged state determination unit, the charging unit causes the charging unit to stop the charging operation of the secondary battery and instructs the power transmission unit to stop the power transmission.
- Command sending means for sending; Recharge determination means for determining whether or not the secondary battery needs to be recharged while the charge of the secondary battery is stopped;
- the electronic device is characterized by further comprising: disconnecting means for temporarily disconnecting the power receiving coil from the circuit when it is determined by the recharging determining means that recharging is necessary.
- Appendix 4 is A charging step of charging the secondary battery using the current induced in the power reception coil; A fully charged state determination step of monitoring the charged state of the secondary battery to determine whether or not the battery is fully charged; When the fully charged state is determined in the fully charged state determination step, the charging operation of the secondary battery is stopped in the charging step, and a command instructing the power transmission unit to stop power transmission is transmitted. Command sending process, A recharging determination step of determining whether or not recharging of the secondary battery is required while the charging of the secondary battery is stopped; And a disconnecting step of temporarily disconnecting the power receiving coil from the circuit when it is determined in the recharging determination step that the battery needs to be recharged.
- Appendix 5 is To a computer of a power reception unit having a power transmission coil of the power transmission unit and a power reception coil that can be coupled by electromagnetic induction; Charging means for charging a secondary battery using the current induced in the power reception coil; Fully charged state determination means for monitoring the charged state of the secondary battery to determine whether or not the battery is fully charged; When the fully charged state is determined by the fully charged state determination unit, the charging unit causes the charging unit to stop the charging operation of the secondary battery and instructs the power transmission unit to stop the power transmission.
- a recharge determination unit that determines whether or not the secondary battery needs to be recharged while the charge of the secondary battery is stopped;
- the program is characterized by providing a function as separating means for temporarily separating the power receiving coil from the circuit when it is determined by the recharging determination means that recharging is necessary.
- Reference Signs List 100 power transmission coil 101 power transmission unit 102 power reception coil 103 power reception unit 104 power transmission unit 105 command reception unit 106 stop unit 107 secondary battery 108 charging unit 109 full charge state determination unit 110 command transmission unit 111 recharging determination unit 112 separation unit 113 charging system
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Abstract
Description
(1)満充電後にコイルがホームポジションに戻ってしまうため、再充電コマンドを伝送できず、再充電を行うことができない。
(2)(1)の欠点は、たとえば、送電側のコイルを定期的(1時間に1回など)に受電側の位置に移動させることで解消できるものの、少なくともコイルが移動するまでの間は再充電が不可であるため、速やかに再充電を行うことができない。
本発明の電子機器は、送電部の送電用コイルと電磁誘導で結合可能な受電用コイルと、前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段と、前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段と、前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信手段と、前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段と、前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段とを備えたことを特徴とする。
本発明の充電制御方法は、受電用コイルに誘起した電流を用いて2次電池を充電する充電工程と、前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定工程と、前記満充電状態判定工程によって満充電状態が判定されたときに前記充電工程に対して2次電池の充電動作を停止させるとともに、送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信工程と、前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定工程と、前記再充電判定工程によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し工程とを含むことを特徴とする。
本発明のプログラムは、送電部の送電用コイルと電磁誘導で結合可能な受電用コイルを有する受電部のコンピュータに、前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段、前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段、前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信手段、前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段、前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段としての機能を与えることを特徴とする。
図1は、可動コイル式の充電システムの外観図である。この図において、可動コイル式の充電システム1は、送電部2と、少なくとも1台の受電部3とにより構成されている。送電部2は冒頭の「送電側」に相当し、受電部3は冒頭の「受電側」に相当する。受電部3は、2次電池で動作する任意の電子機器であり、たとえば、スマートフォンなどの携帯電話機であるが、これに限定されない。無接点方式且つ可動コイル式の充電システムに対応した電子機器であればよい。
送電部2の各部の機能は以下のとおりである。
電源回路15は、商用電源を元にして送電動作に必要な各種電源電圧を生成する機能を有する。各種電源電圧には、各部の動作電圧、送電用コイル13を動かすための電力、送電用コイル13を介して受電部3に送出する送電電力、及び、アレイセンサコイル6の駆動電力などが含まれる。
送電回路16は、アレイセンサコイル6を駆動してプレート5の上に受電部3が載置されたか否かを検出するとともに、その検出結果が肯定の場合に、受電部3の載置位置を検出する第1の機能と、送電用コイル13をホームポジションから受電部3の載置位置へと移動させ、また、充電完了後に送電用コイル13をホームポジションに戻す第2の機能と、受電部3の載置位置に移動した送電用コイル13を駆動して受電部3に電力を送る第3の機能と、受電部3から適宜に送信される充電停止コマンド(または満充電状態コマンド)を受信する第4の機能とを有する。
制御回路16は、コンピュータを主体にして構成されたプログラム制御方式の制御要素であり、予め設定された制御プログラムに従い、上記の電源回路15や送電回路16を制御して各部の機能を実行させる。
受電部3の各部の機能は以下のとおりである。
受電回路18は、受電用コイル14に誘起した電流を整流して直流電圧に変換し、その直流電圧を充電回路19に供給する第1の機能と、充電回路19から適宜に送出される充電停止信号(または満充電信号)に応答して受電用コイル14の電気的特性を変調し、送電部2に対して充電停止コマンド(または満充電コマンド)を送信する第2の機能とを有するほか、さらに、所定のタイミングで充電回路18から受電用コイル14を電気的に切り離す第3の機能を有する。
充電回路19は、受電回路18からの電力で2次電池20を充電する第1の機と、2次電池20の充電状態を監視して過充電手前の満充電状態を検出すると、2次電池20の充電を停止するとともに、受電回路18に対して充電停止信号(または満充電信号)を出力する第2の機能と、さらに、2次電池20の充電停止中に2次電池20の再充電が必要になった場合に、受電回路18に対して切り離し手段24を一度オフにし、再びオンにする旨の指示(制御信号Cをインアクティブ→アクティブ→インアクティブ)を行う第3の機能を有する。これらの第1の機能から第3の機能までを実現するために、充電回路19は、予め設定された制御プログラムを実行するプログラム制御方式のコンピュータで構成された制御回路19aを備える。
2次電池20は、各部(受電回路18、充電回路19、2次電池20、ベースバンド信号回路21、無線送受信回路22、コントローラ23)の動作電力をまかなうための充電可能な電源要素であり、たとえば、ニッカドなどのバッテリである。
ベースバンド信号回路21は、無線送受信回路22やコントローラ23とともに、2次電池20の電力供給を受けて動作する負荷要素であり、これらの負荷要素(ベースバンド信号回路21、無線送受信回路22、コントローラ23)は、たとえば、この受電部3をスマートフォンなどの携帯電話機とした場合のものである。すなわち、ベースバンド信号回路21は、携帯電話機の音声信号をベースバンド信号として生成出力するものであり、また、無線送受信回路22は、そのベースバンド信号を所定の高周波信号に乗せて空中線22aから空間放射し、また、空中線22aで受信した高周波の信号を復調してベースバンド信号に戻し、ベースバンド信号回路21に出力するものである。さらに、コントローラ23は、コンピュータを主体にして構成されたプログラム制御方式の制御要素であり、予め設定された制御プログラムに従い、携帯電話機に必要な動作を統括制御するものである。したがって、これらの負荷要素は、図示のものに限定されない。受電部3の機能に即した任意の負荷要素であればよい。
次に、本実施形態の効果を説明する。
また、受電部3についても、スマートフォンなどの携帯電話に限定されない。無接点方式の充電システムに対応した電子機器であって、2次電池20で動作する任意の負荷要素を備えた電子機器であればよい。
また、以上の説明では、満充電後の再充電としているが、これに限らず、たとえば、充電動作の異常(2次電池の温度異常など)に伴う充電停止後の再充電(充電再開)であってもよい。
上記の実施形態の一部又は全部は、以下の付記のようにも記載されうるが、以下には限られない。
(付記1)
図6は、付記1の構成図である。
この図に示すように、付記1は、
送電用コイル100(実施形態の送電用コイル13に相当)を備えた送電部101(実施形態の送電部2に相当)と、この送電用コイル100と電磁誘導で結合可能な受電用コイル102(実施形態の受電用コイル14に相当)を備えた受電部103(実施形態の受電部3に相当)とを有し、
前記送電部101は、
前記送電用コイル100の近くに前記受電用コイル102が位置したときに前記送電用コイル100を駆動して前記受電用コイル102に電力を送信する電力送信手段104(実施形態の送信回路16に相当)と、
前記受電部103から送信される所定のコマンドを受信するコマンド受信手段105(実施形態の送電回路16に相当)と、
前記所定のコマンドが受信されたときに前記電力送信手段104の電力送信動作を停止させる停止手段106(実施形態の制御回路17に相当)とを備え、
前記受電部103は、
前記受電用コイル102に誘起した電流を用いて2次電池107(実施形態の2次電池20に相当)を充電する充電手段108(実施形態の充電回路19に相当)と、
前記2次電池107の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段109(実施形態の制御回路19aに相当)と、
前記満充電状態判定手段109によって満充電状態が判定されたときに前記充電手段108に対して2次電池107の充電動作を停止させるとともに、前記送電部101に対して前記所定のコマンドを送信するコマンド送信手段110(実施形態の制御回路19aに相当)と、
前記2次電池107の充電停止中に、この2次電池107の再充電が必要な状態にあるか否かを判定する再充電判定手段111(実施形態の制御回路19aに相当)と、
前記再充電判定手段111によって再充電が必要な状態にあると判定されたときに、前記受電用コイル102を一時的に回路から切り離す切り離し手段112(実施形態の切り離し手段24に相当)とを備えたことを特徴とする充電システム113(実施形態の充電システム1に相当)である。
付記2は、
前記送電用コイルは、前記受電用コイルの位置に移動する可動コイルであることを特徴とする付記1に記載の充電システムである。
付記3は、
送電部の送電用コイルと電磁誘導で結合可能な受電用コイルと、
前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段と、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段と、
前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信手段と、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段と、
前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段とを備えたことを特徴とする電子機器である。
付記4は、
受電用コイルに誘起した電流を用いて2次電池を充電する充電工程と、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定工程と、
前記満充電状態判定工程によって満充電状態が判定されたときに前記充電工程に対して2次電池の充電動作を停止させるとともに、送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信工程と、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定工程と、
前記再充電判定工程によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し工程とを含むことを特徴とする充電制御方法である。
付記5は、
送電部の送電用コイルと電磁誘導で結合可能な受電用コイルを有する受電部のコンピュータに、
前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段、
前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信手段、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段、
前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段
としての機能を与えることを特徴とするプログラムである。
101 送電部
102 受電用コイル
103 受電部
104 電力送信手段
105 コマンド受信手段
106 停止手段
107 2次電池
108 充電手段
109 満充電状態判定手段
110 コマンド送信手段
111 再充電判定手段
112 切り離し手段
113 充電システム
Claims (5)
- 送電用コイルを備えた送電部と、この送電用コイルと電磁誘導で結合可能な受電用コイルを備えた受電部とを有し、
前記送電部は、
前記送電用コイルの近くに前記受電用コイルが位置したときに前記送電用コイルを駆動して前記受電用コイルに電力を送信する電力送信手段と、
前記受電部から送信される所定のコマンドを受信するコマンド受信手段と、
前記所定のコマンドが受信されたときに前記電力送信手段の電力送信動作を停止させる停止手段とを備え、
前記受電部は、
前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段と、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段と、
前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して前記所定のコマンドを送信するコマンド送信手段と、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段と、
前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段とを備えたことを特徴とする充電システム。 - 前記送電用コイルは、前記受電用コイルの位置に移動する可動コイルであることを特徴とする請求項1に記載の充電システム。
- 送電部の送電用コイルと電磁誘導で結合可能な受電用コイルと、
前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段と、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段と、
前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信手段と、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段と、
前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段とを備えたことを特徴とする電子機器。 - 受電用コイルに誘起した電流を用いて2次電池を充電する充電工程と、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定工程と、
前記満充電状態判定工程によって満充電状態が判定されたときに前記充電工程に対して2次電池の充電動作を停止させるとともに、送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信工程と、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定工程と、
前記再充電判定工程によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し工程とを含むことを特徴とする充電制御方法。 - 送電部の送電用コイルと電磁誘導で結合可能な受電用コイルを有する受電部のコンピュータに、
前記受電用コイルに誘起した電流を用いて2次電池を充電する充電手段、
前記2次電池の充電状態を監視して満充電状態か否かを判定する満充電状態判定手段、
前記満充電状態判定手段によって満充電状態が判定されたときに前記充電手段に対して2次電池の充電動作を停止させるとともに、前記送電部に対して電力送信を停止させる旨を指示するコマンドを送信するコマンド送信手段、
前記2次電池の充電停止中に、この2次電池の再充電が必要な状態にあるか否かを判定する再充電判定手段、
前記再充電判定手段によって再充電が必要な状態にあると判定されたときに、前記受電用コイルを一時的に回路から切り離す切り離し手段
としての機能を与えることを特徴とするプログラム。
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