WO2014185094A1 - Dispositif d'alimentation en énergie et dispositif de réception d'énergie pour transmission de puissance sans contact - Google Patents

Dispositif d'alimentation en énergie et dispositif de réception d'énergie pour transmission de puissance sans contact Download PDF

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Publication number
WO2014185094A1
WO2014185094A1 PCT/JP2014/051954 JP2014051954W WO2014185094A1 WO 2014185094 A1 WO2014185094 A1 WO 2014185094A1 JP 2014051954 W JP2014051954 W JP 2014051954W WO 2014185094 A1 WO2014185094 A1 WO 2014185094A1
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WO
WIPO (PCT)
Prior art keywords
power
coil
cover
receiving device
sensing means
Prior art date
Application number
PCT/JP2014/051954
Other languages
English (en)
Japanese (ja)
Inventor
洋 井原木
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2014185094A1 publication Critical patent/WO2014185094A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/406—Temperature sensor or protection
    • 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
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Definitions

  • the present invention relates to a power feeding device and a power receiving device that transmit and receive power in a contactless manner.
  • this type of power supply device for example, there is a charging stand described in Patent Document 1.
  • a plurality of PTCs as temperature sensors are connected in series in the middle of a position detection coil provided on the upper surface plate in order to detect the temperature of the object placed on the upper surface plate (that is, the temperature detection target). Yes.
  • a temperature sensor can also be provided on the power receiving device side to be charged.
  • the position detection coils intersect three-dimensionally at least at one place on the top plate, and the wiring conductors constituting the position detection coil are arranged close to each other. Therefore, the induced current easily flows through the position detection coil due to the influence of the fluctuation of the magnetic flux generated in the power transmission coil. Due to this induced current, the PTC self-heats, and as a result, there is a possibility that the temperature of the mounted object cannot be detected correctly.
  • an object of the present invention is to provide a power feeding device and a power receiving device that can accurately detect the temperature of an object.
  • one aspect of the present invention is a power feeding device and a power receiving device that transmit and receive power in a non-contact manner, a coil and a cover that covers the coil, and the power receiving device and A cover interposed between the power supply device and the coil included in the power supply device; a plurality of temperature sensing means provided on the cover; a plurality of temperature sensing means for detecting an object temperature on the cover; A plurality of wiring conductors connecting the plurality of temperature sensing means in series, the wiring conductors being provided in substantially the same plane without crossing in three dimensions.
  • each wiring conductor is used to connect a plurality of temperature sensing means in series, but is provided on the same plane without three-dimensionally intersecting. Therefore, since the amount of wiring conductor per unit area on this plane can be reduced, when an AC magnetic field is generated by a coil during power transmission, the time variation of the magnetic flux passing through the wiring conductor is reduced, and induction current is generated. Can be reduced. Accordingly, it is possible to provide a power feeding device and a power receiving device that can accurately detect the temperature of the object.
  • FIG. 1 It is a block diagram which shows the structure of the non-contact electric power transmission system provided with the electric power feeder which concerns on one Embodiment of this invention, and an electric power receiving apparatus. It is a side view of the electric power feeder shown in FIG. It is a front view of the electric power feeder shown in FIG. It is a top view of the electric power feeder shown in FIG. It is a schematic diagram which shows the structure of the temperature detection circuit shown in FIG. It is a schematic diagram which shows the structure of the modification of the temperature detection circuit shown in FIG.
  • the X axis indicates the left-right direction of the power feeding device
  • the Y axis indicates the front-back direction of the power feeding device
  • the Z axis indicates the vertical direction of the power feeding device.
  • the non-contact power transmission system 1 includes a power feeding device 3.
  • the power feeding device 3 is roughly configured to include an adapter 31, a transmission system component group 33, a primary coil 35, a primary side controller 37, and a temperature detection circuit 39.
  • the component group 33, the coil 35, and the controller 37 are arranged on the base 311 and covered with a cover 313 as indicated by dotted lines in FIG. 2A and FIG. 2B.
  • the power receiving device 5 includes a secondary coil 51, a transmission system component group 53, and a secondary controller 55.
  • a secondary coil 51 As shown in FIG. 1, the power receiving device 5 includes a secondary coil 51, a transmission system component group 53, and a secondary controller 55.
  • a secondary controller 55 As shown in FIG. 1, the power receiving device 5 includes a secondary coil 51, a transmission system component group 53, and a secondary controller 55.
  • the cover 313 can be made of, for example, glass having a thermal conductivity ⁇ of 0.17 [W / (m ⁇ K)].
  • the adapter 31 supplies an AC voltage (for example, 100 V) from a commercial power source to the transmission system component group 33.
  • the transmission system component group 33 constitutes a rectifier circuit, a smoothing circuit, an inverter circuit, and the like.
  • the input AC voltage is converted into a DC voltage by the rectifier circuit and the smoothing circuit.
  • the inverter circuit generates an AC voltage having a predetermined frequency (for example, several tens of kHz) by switching the output DC voltage of the smoothing circuit and supplies the AC voltage to the coil 35.
  • the coil 35 is generally manufactured by spirally winding a copper wire or the like around an axis A (see FIGS. 2A to 2C) substantially parallel to the Z axis.
  • the controller 37 controls the coil 35.
  • the power receiving device 5 is placed on the cover 313 so that the secondary coil 51 is positioned on the primary coil 35 with the cover 313 interposed therebetween.
  • the alternating magnetic field generated in the coil 35 is linked with the coil 51, and an alternating voltage is induced at both ends of the coil 51 and applied to the transmission system component group 53.
  • the transmission system component group 53 includes a rectifier circuit and the like, rectifies an alternating current flowing by the induced voltage, and supplies the rectified circuit to a battery 57 connected to the controller 55 of the power receiving device 5. Thereby, the battery 57 is charged.
  • the above operation is controlled by the controller 55.
  • the power supply device 3 includes a temperature detection circuit 39.
  • the temperature detection circuit 39 includes a PTC thermistor 315 as a typical example of the plurality of temperature sensing means 315 and a plurality of wiring conductors 317.
  • the PTC thermistor 315 is a ceramic thermistor having a positive temperature coefficient.
  • the PTC thermistor 315 has a small heat capacity, for example, a small size with a volume of 7.2 mm 3 so that it can respond to overheating of the object at high speed.
  • a small PTC thermistor 315 there is a 1005 type described in the JIS standard.
  • the dimension in the Y-axis direction is 1.0 mm
  • the dimension in the X-axis direction is 0.5 mm.
  • the dimension in the Z-axis direction is not defined by the JIS standard, but is, for example, 0.25 mm.
  • the PTC thermistor 315 as described above is provided between the surface of the cover 313 and the upper end of the primary coil 35. As an example, in the present embodiment, each PTC thermistor 315 is provided inside the cover 313.
  • the power feeding device 3 is often designed so as not to limit the placement position of the power receiving device 5, so that the user can place the power receiving device 5 at a free position on the cover 313. . Therefore, the temperature detection circuit 39 includes a plurality of PTC thermistors 315. In the present embodiment, as shown in FIG. 3, sixteen PTC thermistors 315 are embedded in different locations in the cover 313 in a matrix in a plan view from the vertical direction (the direction of the axis A). Note that reference numeral “315” is added only to the four PTC thermistors existing on the X-axis negative direction side.
  • the distance to the PTC thermistor 315 adjacent in the front-rear direction and the distance to the PTC thermistor 315 adjacent in the left-right direction are set to be approximately equal.
  • this distance is set to, for example, 2.5 [cm].
  • the sixteen PTC thermistors 315 are connected in series by a plurality of wiring conductors 317.
  • the reference numeral “317” is added only to the wiring conductor that connects the PTC thermistor to which the above reference numeral “315” is added.
  • Each wiring conductor 317 is formed by printing a paste such as silver or copper on the same surface substantially parallel to the XY plane. Further, the individual wiring conductors 317 do not cross three-dimensionally with the other wiring conductors 317. In order to connect in this way, for example, first, four PTC thermistors 315 arranged in the front-rear direction are connected in series by a plurality of wiring conductors 317 formed on the surface.
  • the front ends of the first row and the second row, counting from the left end, are connected by the wiring conductor 317 on the surface. Similarly, the rear ends of the second and third rows from the left end are connected, and the front ends of the third and fourth rows are connected.
  • all the PTC thermistors 315 thus connected are referred to as a thermistor chain. According to such a thermistor chain, the current path meanders in the cover 313 in plan view from above and below.
  • a fixed resistance of 100 [k ⁇ ] is connected in series to one end of the thermistor chain, and the other end is grounded.
  • a constant voltage of, for example, 5.0 [V] is supplied to both ends of this circuit by a constant voltage circuit (not shown). If an object to be measured is placed on the cover 313 while AC power is being supplied to the coil 35, the resistance value of the PTC thermistor 315 changes. Therefore, the partial pressure between the fixed resistance and the resistance value of the thermistor chain represents the temperature to be measured.
  • Such temperature information is output to the controller 37.
  • the controller 37 stops the power supply to the primary coil 35 when the input temperature information exceeds the predetermined temperature.
  • the intensity of the alternating magnetic field generated by the coil 35 basically decreases as the distance from the outer edge of the coil 35 in the X-axis direction and the Y-axis direction in a plan view from above and below.
  • a region having a predetermined magnetic field strength (for example, 1.0 [A / m]) or more on the upper surface of the cover 313 (that is, on the XY plane) is referred to as a region B.
  • the region B is a region surrounded by an alternate long and short dash line in FIG.
  • Each row including the four wiring conductors 317 arranged in the front-rear direction preferably passes through this region B in the front-rear direction. Further, it is preferable that even-numbered columns pass through the region B. Furthermore, it is more preferable that the ends of adjacent rows are connected outside this region B.
  • the plurality of PTC thermistors 315 are connected in series by the plurality of wiring conductors 317.
  • the wiring conductors 317 are provided in substantially the same plane without crossing three-dimensionally with the other wiring conductors 317. Further, the plurality of wiring conductors 317 meander in the cover 313 without being close to each other in a plan view from the vertical direction. Accordingly, unlike the conventional case, the amount of the wiring conductor 317 per unit area (that is, the amount of metal) in the region B can be reduced. Time change of magnetic flux can be reduced. Thereby, generation
  • each PTC thermistor row is connected by a wiring conductor 317 extending in the front-rear direction. An even number of such PTC thermistor rows are formed, and each pass through the region B. Further, ends of adjacent PTC thermistor rows are connected outside the region B by wiring conductors 317 extending in the left-right direction.
  • the induced currents generated in adjacent PCT thermistor rows flow into the left and right wiring conductors 317 that connect them, and are thus canceled out. Therefore, since the influence of the induced current is reduced in the temperature detection of the object by the temperature detection circuit 39, the temperature of the object can be detected more accurately.
  • the thermistor chain is configured to reciprocate the cover 313 a plurality of times in the front-rear direction.
  • the present invention is not limited to this, and a plurality of thermistor chains that reciprocate the cover 313 once in the front-rear direction may be provided on the cover 313 as shown in FIG.
  • a plurality of PTC thermistors 315 arranged in the front-rear direction are connected by the wiring conductor 317.
  • the present invention is not limited to this, and a plurality of PTC thermistors 315 arranged in the horizontal direction may be connected by the wiring conductor 317.
  • the present invention is not limited to this, and the power receiving device 5 may include the temperature detection circuit 39 described above.
  • the power supply device 3 has been described for charging purposes such as smartphones and tablet terminals.
  • the present invention is not limited to this, and the power feeding device 3 may be used for charging an electric vehicle or a consumer device such as a shaver.
  • the PTC ceramic thermistor 315 is exemplified as the temperature sensing means 315.
  • an NTC thermistor may be used as the temperature sensing means 315.
  • the temperature sensing means 315 not only a ceramic thermistor but also a thermistor made of a polymer material may be used.
  • the cover 313 may be made of an epoxy resin having a thermal conductivity ⁇ of 0.25 [W / (m ⁇ K)] other than glass.
  • the PTC ceramic thermistor 315 is not limited to the 1005 type, and may be a 3225 type, 3216 type, 2012 type, 1608 type, 0603 type, or 0402 type. Regarding these, dimensions in the X-axis, Y-axis, and Z-axis directions are as shown in Table 1 below.
  • the power feeding device and the power receiving device according to the present invention can accurately detect overheating of an object on the cover, and are suitable for a non-contact charging system such as a smartphone, a tablet terminal, or an electric vehicle.
  • Non-contact electric power transmission system 3 Feeder 35 Primary coil 39 Temperature detection circuit 313 Cover 315 Temperature sensing means (PTC thermistor) 317 Wiring conductor 5 Power receiving device

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Afin de fournir de l'énergie à un dispositif de réception d'énergie sans contact, un dispositif d'alimentation en énergie est équipé : d'une bobine (35) ; d'un couvercle (313) qui recouvre la bobine (35) et qui est intercalé entre le dispositif de réception d'énergie (5) et la bobine (35) lors de l'alimentation en énergie ; d'un circuit de détection de température (39) qui comprend une pluralité de moyens de détection de température (315) prévus sur le couvercle (313) et qui détecte la température d'un objet sur le couvercle (313) ; et d'une pluralité de conducteurs de fil électrique (317) qui connectent la pluralité de moyens de détection de température (315) en série et qui sont prévus approximativement dans le même plan sans intersection tridimensionnelle. Par conséquent, il est possible de détecter précisément la surchauffe de l'objet sur le couvercle (313).
PCT/JP2014/051954 2013-05-14 2014-01-29 Dispositif d'alimentation en énergie et dispositif de réception d'énergie pour transmission de puissance sans contact WO2014185094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-101968 2013-05-14
JP2013101968 2013-05-14

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Publication Number Publication Date
WO2014185094A1 true WO2014185094A1 (fr) 2014-11-20

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006078478A (ja) * 2004-08-12 2006-03-23 Komatsu Ltd フィルム温度センサ及び温度測定用基板
JP2009264803A (ja) * 2008-04-23 2009-11-12 Murata Mfg Co Ltd 面状温度検出センサ
JP2012228123A (ja) * 2011-04-21 2012-11-15 Nissan Motor Co Ltd 非接触給電装置
JP2013005682A (ja) * 2011-06-21 2013-01-07 Panasonic Corp 非接触電力伝送システム
JP2013017247A (ja) * 2011-06-30 2013-01-24 Panasonic Corp 非接触電力伝送に用いられる給電装置及び受電装置
JP2013030551A (ja) * 2011-07-27 2013-02-07 Panasonic Corp 非接触給電装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006078478A (ja) * 2004-08-12 2006-03-23 Komatsu Ltd フィルム温度センサ及び温度測定用基板
JP2009264803A (ja) * 2008-04-23 2009-11-12 Murata Mfg Co Ltd 面状温度検出センサ
JP2012228123A (ja) * 2011-04-21 2012-11-15 Nissan Motor Co Ltd 非接触給電装置
JP2013005682A (ja) * 2011-06-21 2013-01-07 Panasonic Corp 非接触電力伝送システム
JP2013017247A (ja) * 2011-06-30 2013-01-24 Panasonic Corp 非接触電力伝送に用いられる給電装置及び受電装置
JP2013030551A (ja) * 2011-07-27 2013-02-07 Panasonic Corp 非接触給電装置

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