WO2013121757A1 - 給電装置、受電装置、充電システム及び障害物検出方法 - Google Patents

給電装置、受電装置、充電システム及び障害物検出方法 Download PDF

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Publication number
WO2013121757A1
WO2013121757A1 PCT/JP2013/000689 JP2013000689W WO2013121757A1 WO 2013121757 A1 WO2013121757 A1 WO 2013121757A1 JP 2013000689 W JP2013000689 W JP 2013000689W WO 2013121757 A1 WO2013121757 A1 WO 2013121757A1
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WO
WIPO (PCT)
Prior art keywords
test data
power
data sequence
transmission
obstacle
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2013/000689
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English (en)
French (fr)
Japanese (ja)
Inventor
聡 中屋
剛 西尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
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Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Priority to EP13749243.5A priority Critical patent/EP2816706B1/en
Priority to CN201380008227.4A priority patent/CN104094499B/zh
Priority to US14/378,240 priority patent/US9484988B2/en
Publication of WO2013121757A1 publication Critical patent/WO2013121757A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]

Definitions

  • the present invention relates to a power feeding device that supplies power in a contactless manner using electromagnetic induction, a power receiving device that receives power supply from the power feeding device, a power feeding device, a charging system including the power receiving device, and an obstacle detection method.
  • an energy supply technique for charging a storage battery mounted on a vehicle using a microwave is known.
  • electric power is supplied to a magnetron from a microwave power source of a power supply device installed on the ground such as a parking lot, and a microwave is generated by the magnetron.
  • Microwaves generated from each magnetron are sent to a power receiving device disposed on the bottom surface of the vehicle via each power transmission antenna.
  • Microwaves received by the power receiving device are converted into electric power, rectified, converted into DC power, and then supplied to the storage battery.
  • Patent Document 1 discloses a method for detecting the presence or absence of an obstacle between a power feeding side and a power receiving side.
  • Patent Document 1 there is a possibility that an obstacle exists between the power transmission unit and the power reception unit when the transmission efficiency of the power supplied from the power transmission unit to the power reception unit is less than the specified value.
  • a technique for temporarily stopping power transmission is disclosed.
  • Patent Document 1 has a problem that when the obstacle is small, the amount of change in transmission efficiency is small and sufficient obstacle detection sensitivity cannot be obtained.
  • An object of the present invention is to provide a power feeding device, a power receiving device, a charging system, and an obstacle detection method that can obtain sufficient obstacle detection sensitivity even when the obstacle is small.
  • a power supply device is a power supply device that supplies power to a power receiving device provided in a vehicle in a non-contact manner using electromagnetic induction, and uses a first test data string having a predetermined data series as an electromagnetic induction of a coil.
  • Transmitting means for transmitting to the power receiving apparatus, control means for controlling to transmit the first test data string transmitted by the transmitting means, and the power receiving apparatus receiving and receiving the first test data string
  • Receiving means for demodulating the first test data string and receiving the data string transmitted as the second test data string; the first test data string transmitted by the transmitting means; and the second test data received by the receiving means. Based on whether or not the columns match, a determination unit that determines whether there is an obstacle between the power receiving device and the power feeding device is adopted.
  • a power receiving device is a vehicle that receives power from a power supply device in a contactless manner using electromagnetic induction and transmits a data string for determining the presence or absence of an obstacle between the power supply device and the power receiving device.
  • a power receiving device provided, receiving means for receiving a first test data string transmitted from the power feeding device using electromagnetic induction of a coil, and demodulating the first test data string received by the receiving means.
  • a configuration is provided that includes a demodulating unit that generates a second test data sequence, and a transmitting unit that transmits the second test data sequence generated by the demodulating unit to the power supply apparatus.
  • the charging system of the present invention is a charging system including a power receiving device provided in a vehicle and a power feeding device that supplies power to the power receiving device in a non-contact manner using electromagnetic induction, and the power feeding device has predetermined data.
  • a power control unit that controls to repeatedly transmit the data, and the power receiving device receives the first test data sequence, receives the data sequence transmitted as a second test data sequence by demodulating the received first test data sequence Determining whether or not the first receiving means, the first test data sequence transmitted by the first transmitting means, and the second test data sequence received by the first receiving means match, If so, a determination unit that determines the presence or absence of an obstacle between the power receiving device and the power supply device, based on a transmission power level when the first transmission unit transmits the first test data string; And the power receiving apparatus demodulates the first test data string received by the second receiving means, second receiving means for receiving the first test data string from the power supply apparatus, and the second test data string.
  • a configuration is provided that includes demodulation means for generating a test data sequence, and second transmission means for transmitting the second test data sequence generated by the demodulation means to the power supply apparatus.
  • the obstacle detection method of the present invention is an obstacle detection method for determining the presence or absence of an obstacle between a power receiving device provided in a vehicle and a power feeding device that supplies electric power to the power receiving device in a contactless manner using electromagnetic induction.
  • a method comprising: transmitting a first test data sequence having a predetermined data series to the power receiving device using electromagnetic induction of a coil; and transmitting the first test data sequence transmitted in the transmission step.
  • a control step for controlling the first test data sequence, the first test data sequence transmitted in the transmission step, and the power receiving device receiving the first test data sequence and demodulating the received first test data sequence.
  • a determination step of determining the presence or absence of an obstacle between the power receiving device and the power feeding device based on whether or not the test data string matches.
  • FIG. 1 Block diagram showing the structure of the charging system which concerns on Embodiment 1 of this invention.
  • Block diagram showing the functional configuration of the power transmission side microcomputer shown in FIG. The figure which shows the mode of the transmission / reception of the test data sequence between a power transmission unit and a power receiving unit
  • the flowchart which shows the power receiving preparation procedure of the power receiving unit which concerns on Embodiment 1 of this invention The block diagram which shows the function structure of the power receiving side microcomputer which concerns on Embodiment 2 of this invention.
  • FIG. 1 is a block diagram showing a configuration of charging system 100 according to Embodiment 1 of the present invention.
  • the charging system 100 includes a power transmission unit 120 and a power reception unit 150.
  • the power transmission unit 120 includes a power supply circuit 121, a power transmission inverter 122, a power transmission side microcomputer 123, a power transmission side reception circuit 124, and a power transmission coil 125.
  • the power supply circuit 121 is a power supply that generates a direct current from a household power supply.
  • the power supply circuit 121 generates a direct current power supply from alternating current electric energy of about 100 to 240 V and outputs it to the power transmission inverter 122.
  • the output direct current electric energy is further generated according to the control of the power transmission side microcomputer 123 to generate high frequency alternating current electric energy and supplied to the power transmission coil 125.
  • the power transmission side microcomputer 123 stores a predetermined test data string (for example, an 8-bit bit string) in advance, and transmits the test data string with low power before starting the power supply to the power receiving unit 150. To control.
  • the test data string is modulated and transmitted by amplitude modulation or phase modulation. Further, the power transmission side microcomputer 123 changes the transmission power level of the test data string (hereinafter simply referred to as “power level”) every time the test data string is transmitted until the correct test data string is received from the power transmission side receiving circuit 124. increase. Further, when the power transmission side microcomputer 123 receives a correct test data string from the power transmission side reception circuit 124, the power transmission side microcomputer 123 determines the presence or absence of an obstacle based on the power level at that time.
  • power level transmission power level
  • the power transmission side reception circuit 124 receives the test data sequence transmitted from the power reception unit 150 and outputs the received test data sequence to the power transmission side microcomputer 123.
  • the power transmission coil 125 generates electromagnetic induction due to the electric energy supplied from the power transmission inverter 122, and supplies power to the power reception coil 151 of the power reception unit 150.
  • the power receiving unit 150 includes a power receiving coil 151, a power receiving side receiving circuit / inverter 152, a power receiving side microcomputer 153, a power supply circuit 154, a switch 155, a rectifier 156, a filter circuit 157, and a load 158.
  • the power receiving coil 151 supplies the power supplied from the power transmission coil 125 of the power transmission unit 120 to the power receiving side receiving circuit / inverter 152 and the rectifier 156.
  • the power receiving side receiving circuit / inverter 152 demodulates the test data sequence included in the power supplied from the power receiving coil 151, and outputs the demodulated test data sequence to the power receiving side microcomputer 153.
  • the power receiving side microcomputer 153 uses the power supply circuit 154 to amplitude-modulate the test data sequence output from the power receiving side receiving circuit / inverter 152 and transmit power at a power level at which the power transmission unit 120 can receive the amplitude-modulated test data sequence.
  • the power receiving side receiving circuit / inverter 152 is controlled to transmit to the unit 120.
  • the power transmission unit 120 and the power reception unit 150 mutually transmit and receive the test data sequence using the electromagnetic induction of the coil, and the power reception unit 150 demodulates the test data sequence transmitted from the power transmission unit 120. Is directly modulated and returned to the power transmission unit 120. That is, even if there is an error in the demodulated test data string, the test data string is returned with the error included.
  • the power supply circuit 154 is a storage battery or the like and is charged after the start of power transmission.
  • the switch 155 is controlled by a control unit (not shown) or the like, and is turned off during transmission / reception of the test data string before starting power reception from the power transmission unit 120 and turned on when power reception from the power transmission unit 120 is started.
  • the load 158 can be disconnected to avoid the influence on the transmission / reception of the test data string.
  • the rectifier 156 rectifies the current supplied from the power receiving coil 151, and the filter circuit 157 filters the current rectified by the rectifier 156 and outputs it to the load 158.
  • the load 158 is a battery that is charged by the present charging system, and the current output from the filter circuit 157 is charged.
  • FIG. 2 is a block diagram showing a functional configuration of the power transmission side microcomputer 123 shown in FIG.
  • a test data string storage unit 201 stores a test data string (for example, an 8-bit bit string) having a predetermined data series, and the test data string is modulated by the modulation unit 202 and the determination unit according to an instruction from the determination unit 204. To 204.
  • the modulation unit 202 performs amplitude modulation or phase modulation on the test data sequence output from the test data sequence storage unit 201, and outputs the modulated test data sequence to the power transmission inverter 122.
  • the power control unit 203 In response to an instruction from the determination unit 204, the power control unit 203 generates a power control signal that increases the power level of the test data sequence every time the test data sequence is transmitted, and outputs the generated power control signal to the power transmission inverter 122. To do.
  • the determination unit 204 determines whether or not the test data sequence output from the test data sequence storage unit 201 matches the test data sequence output from the power transmission side reception circuit 124 and received from the power reception side inverter. In addition, the determination unit 204 stores a power level at which transmission / reception of the test data sequence is successful in a state where there is no obstacle in advance, and the power level when the above-described determination result matches is the stored power level. If there is an obstacle, it is determined that there is no obstacle, and if the power level when the result of the determination described above matches the stored power level, it is determined that there is an obstacle.
  • FIG. 3 is a diagram illustrating how test data strings are transmitted and received between the power transmission unit 120 and the power reception unit 150.
  • the power transmission unit 120 transmits the test data string “01100100” at the power level 1 that is the minimum power.
  • the power receiving unit 150 cannot receive the power level 1 and cannot return the test data string.
  • the power transmission unit 120 transmits the test data string “01100100” to the power level 2 because the test data string transmitted at the power level 1 cannot be received at the predetermined reception timing.
  • the power receiving unit 150 cannot receive even the power level 2 and cannot return the test data string.
  • the power transmission unit 120 transmits the test data string “01100100” to the power level 3 because the test data string transmitted at the power level 2 could not be received at the predetermined reception timing. Although the power receiving unit 150 was able to receive the test data sequence, the power level was low, so that a reception error occurred in the test data sequence, and the test data sequence was set to “01000010”. Return to 120.
  • the power transmission unit 120 recognizes that the test data sequence transmitted at the power level 3 is received by the power receiving unit 150 by mistake, and increases the power level 4 to transmit the test data sequence “01100100”. Although the power receiving unit 150 was able to receive the test data sequence, the power level is still low, so that a reception error occurs in the test data sequence, and the test data sequence is returned to the power transmission unit 120 as “01000100”.
  • the power transmission unit 120 recognizes that the test data sequence transmitted at the power level 4 is received by the power receiving unit 150 by mistake, and increases the power level 5 to transmit the test data sequence “01100100”. Since the power receiving unit 150 has received the test data string correctly, the power receiving unit 150 returns the test data string “01100100” to the power transmission unit 120.
  • transmission / reception of the test data sequence between the power transmission unit 120 and the power reception unit 150 is successful at the power level 5 with no obstacle between the power transmission unit 120 and the power reception unit 150, the power transmission unit 120 is connected to the power reception unit 150. It is determined that there is no obstacle.
  • successful transmission / reception means that the test data sequence transmitted by the power transmission unit 120 matches the test data sequence received by the power transmission unit 120 from the power reception unit 150.
  • the power receiving unit 150 correctly receives the test data string and returns the test data string “01100100” to the power transmission unit 120. .
  • the inter-coil communication is performed between the power transmission coil 125 and the power reception coil 151, and the test data is repeatedly measured until the power transmission unit 120 receives from the power reception unit 150 a test data sequence that matches the transmitted test data sequence.
  • the power level is increased step by step, and the power level transmitted when the power transmission unit 120 can correctly receive the test data sequence has been successfully transmitted and received with no obstacles in advance. If it is a power level, it is determined that there is no obstacle, and if it exceeds a power level at which transmission / reception has succeeded without an obstacle, it is determined that an obstacle exists. Thereby, even a small obstacle can be detected, and the obstacle detection sensitivity can be improved.
  • FIG. 4 is a flowchart showing an obstacle detection procedure of the power transmission unit 120 according to Embodiment 1 of the present invention.
  • step (hereinafter abbreviated as “ST”) 301 power level 1 is set, and in ST 302, it is determined whether or not the transmission of the test data sequence has been performed a predetermined number of times. If so, the obstacle detection procedure is terminated, and if it is less than a certain number of times, the process proceeds to ST303.
  • test data string is transmitted at the set power level, and in ST304, reception of the test data string returned from the power receiving unit 150 is awaited.
  • ST305 it is determined whether or not a test data string returned from power receiving unit 150 has been received. If received, the process proceeds to ST306. If not received, the power level is increased in ST307, and ST302 is received. Return to.
  • test data string returned from the power receiving unit 150 it is determined whether or not the test data string returned from the power receiving unit 150 is normal. If normal, the process proceeds to ST308, and if incorrect, the power level is increased in ST307 and the process returns to ST302.
  • ST309 it is determined that there is no obstacle and power transmission is possible.
  • a power transmission start signal is transmitted to the power receiving unit 150.
  • ST311 power transmission is started and the obstacle detection procedure is terminated.
  • FIG. 5 is a flowchart showing a power receiving preparation procedure of the power receiving unit 150 according to Embodiment 1 of the present invention. 5, in ST401, the switch 155 is turned OFF, and in ST402, reception of a test data string transmitted from the power transmission unit 120 is awaited.
  • ST404 it is determined whether or not a test data string has been received. If received, the process proceeds to ST405, and if not received, the process returns to ST402.
  • the received test data string is transmitted to the power transmission unit 120.
  • the power level is changed stepwise every time the test data string is repeatedly transmitted until the power transmission unit receives the test data string that matches the transmitted test data string from the power receiving unit. Increasing and obtaining sufficient obstacle detection sensitivity even when the obstacle is small by detecting the presence or absence of the obstacle based on the power level transmitted when the power transmission unit has received the test data string correctly be able to.
  • test data string is transmitted from the power receiving unit by inter-coil communication.
  • present invention is not limited to this, and power is received by other communication means such as wireless communication or infrared communication.
  • the test data string may be transmitted from the unit to the power transmission unit.
  • Emodiment 2 The charging system according to the second embodiment of the present invention is the same as the configuration shown in FIG. 1 of the first embodiment, and only the functions of the power transmission side microcomputer and the power reception side microcomputer are different. Different functions will be described.
  • the test data string storage unit 201 stores a test data string that is associated with each of the variable power levels in advance. For example, in the 8-bit test data string, 3 bits 000 to 111 from the 5th bit to the 7th bit are associated with the power levels 1 to 8.
  • the test data sequence storage unit 201 outputs the test data sequence to the modulation unit 202 and the determination unit 204 according to an instruction from the determination unit 204. Thereby, it is possible to transmit a test data string corresponding to the power level control by the power control unit 203.
  • FIG. 6 is a block diagram showing a functional configuration of the power receiving side microcomputer according to the second embodiment of the present invention.
  • the modulation unit 501 amplitude-modulates or phase-modulates the demodulated test data sequence output from the power-receiving-side receiving circuit / inverter 152 and outputs the modulated test data sequence to the power-receiving-side receiving circuit / inverter 152. .
  • the power control unit 502 generates a power control signal indicating the power level indicated by the demodulated test data sequence output from the power receiving side receiving circuit / inverter 152, and the generated power control signal is used as the power receiving side receiving circuit / inverter 152. Output to.
  • FIG. 7 is a diagram illustrating how test data strings are transmitted and received between the power transmission unit 120 and the power reception unit 150.
  • the power transmission unit 120 transmits the test data string “10100001” indicating the power level 1 at the power level 1 that is the minimum power.
  • the power receiving unit 150 cannot receive the power level 1 and cannot return the test data string.
  • the power transmission unit 120 increases the power level 2 and transmits the test data string “101000011” indicating the power level 2 because the test data string transmitted at the power level 1 cannot be received at the predetermined reception timing.
  • the power receiving unit 150 cannot receive the power level 2 and cannot return the test data string.
  • the power transmission unit 120 transmits the test data string “10100101” indicating the power level 3 to the power level 3 because the test data string transmitted at the power level 2 could not be received at the predetermined reception timing. Although the power receiving unit 150 was able to receive the test data sequence, the power level is low, so a reception error occurred in the test data sequence, and the test data sequence “10100001” indicating the power level 1 is returned to the power transmission unit 150 at the power level 1 To do.
  • the power transmission unit 150 increases the power level 4 and transmits the test data string “10100111” indicating the power level 4 because the test data string transmitted at the power level 3 cannot be received at the predetermined reception timing. Although the power receiving unit 150 was able to receive the test data sequence, the power level is still low, so a reception error occurred in the test data sequence, and the test data sequence “10100101” indicating the power level 3 is transmitted to the power transmission unit 120 at the power level 3. Return it.
  • the power transmission unit 120 recognizes that the test data sequence transmitted at the power level 4 is received by the power reception unit 150 by mistake, increases to the power level 5, and sets the test data sequence “10101001” indicating the power level 5. Send. Since the power receiving unit 150 has received the test data sequence correctly, the power receiving unit 150 returns the test data sequence “10101001” indicating the power level 5 to the power transmission unit 120 at the power level 5.
  • the power transmission unit 120 is connected to the power reception unit 150. It is determined that there is no obstacle.
  • the power transmission unit 120 transmits the test data string “10101101” indicating the power level 6 at the power level 6, the power receiving unit 150 correctly receives the test data string and sets the power level 6.
  • the test data string “10101101” shown is returned to the power transmission unit 150 at the power level 6.
  • the power transmission unit 120 performs the inter-coil communication between the power transmission coil 125 and the power reception coil 151 until the power transmission unit 120 receives from the power reception unit 150 a test data sequence that matches the transmitted test data sequence.
  • the power level is increased stepwise, and the power level transmitted when the power transmission unit 120 can correctly receive the test data sequence has no obstacle in advance. If the power level at which transmission / reception of the test data sequence is successful in the state is determined, it is determined that there is no obstacle, and if the power level at which transmission / reception has been successful without the obstacle is exceeded, it is determined that there is an obstacle. . Thereby, even a small obstacle can be detected, and the obstacle detection sensitivity can be improved.
  • FIG. 8 is a flowchart showing an obstacle detection procedure of the power transmission unit according to the second embodiment of the present invention.
  • the parts in FIG. 8 that are the same as those in FIG. 4 are denoted by the same reference numerals as those in FIG.
  • ST601 a test data string indicating the set power level is transmitted at the power level.
  • FIG. 9 is a flowchart showing a power receiving preparation procedure of the power receiving unit according to the second embodiment of the present invention.
  • the parts in FIG. 9 common to FIG. 5 are denoted by the same reference numerals as those in FIG.
  • ST701 the received test data sequence is transmitted to the power transmission unit at the power level indicated by the received test data sequence.
  • the power transmission unit repeatedly transmits the test data sequence in each of the power transmission unit and the power reception unit until it receives from the power reception unit a test data sequence that matches the transmitted test data sequence. Even if the obstacle is small by increasing the power level step by step and detecting the presence or absence of the obstacle based on the power level transmitted when the power transmission unit has received the test data string correctly, Sufficient obstacle detection sensitivity can be obtained.
  • test data string has been described as 8 bits.
  • the present invention is not limited to this, and a number of bits of 8 bits or more may be used depending on the number of variable power levels. Further, error detection may be performed using a parity bit in the test data string.
  • the transmission power level at which the transmission / reception of the test data sequence between the power transmission unit and the power reception unit is successful is determined, the transmission power level is once lowered and the transmission / reception of the test data sequence is performed again.
  • the minimum power level necessary and sufficient for the test data string to be successfully transmitted and received is confirmed. You may make it search.
  • the power feeding device, power receiving device, charging system, and obstacle detection method according to the present invention are suitable for obtaining sufficient obstacle detection sensitivity.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
PCT/JP2013/000689 2012-02-13 2013-02-08 給電装置、受電装置、充電システム及び障害物検出方法 Ceased WO2013121757A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13749243.5A EP2816706B1 (en) 2012-02-13 2013-02-08 Power supply device, power receiving device, charging system, and obstacle detection method
CN201380008227.4A CN104094499B (zh) 2012-02-13 2013-02-08 供电装置、受电装置、充电系统以及障碍物检测方法
US14/378,240 US9484988B2 (en) 2012-02-13 2013-02-08 Power supply device, power receiving device, charging system, and obstacle detection method

Applications Claiming Priority (2)

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JP2012-028543 2012-02-13
JP2012028543A JP5147999B1 (ja) 2012-02-13 2012-02-13 給電装置、受電装置、充電システム及び障害物検出方法

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US (1) US9484988B2 (enExample)
EP (1) EP2816706B1 (enExample)
JP (2) JP5147999B1 (enExample)
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WO (1) WO2013121757A1 (enExample)

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CN103763720A (zh) * 2014-01-03 2014-04-30 北京智谷睿拓技术服务有限公司 无线能量传输的障碍事由检测方法和系统
CN104659887A (zh) * 2013-11-20 2015-05-27 三星电机株式会社 非接触式电源装置和非接触式供电方法

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US9484988B2 (en) 2016-11-01

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