Non-contact power supply apparatus and non-contact power supply system

• US 9,680,530 B2
• Filed: 11/20/2012
• Issued: 06/13/2017
• Est. Priority Date: 11/24/2011
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Original Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Inventors: Kondo, Tadashi
• Primary Examiner(s): Grant, Robert
• Assistant Examiner(s): O'Neill-Becerril, Harry
• Application Number:
  US14/359,457
• Publication Number:
  US 20140320079A1
• Time in Patent Office: 1,666 Days
• Field of Search: 320108
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 3/00 Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption methods or circuit arrangements for monitoring or controlling batteries or fuel cells B60L58/00
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10
• CPC Class Codes: G01R 31/54 Testing for continuity
• CPC Class Codes: G01R 31/72 Testing of electric windings testing of transformers G01R31/62
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 : Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A non-contact power supply apparatus is configured to transmit power in a non-contact manner from a primary-side coil to a secondary-side coil by supplying alternating current power to the primary-side coil. The non-contact power supply apparatus is provided with an alternating current power output unit, a power transmitting unit, wiring, a detecting unit, and a determining unit. The alternating current power output unit is capable of outputting alternating current power. The power transmitting unit has the primary-side coil. The wiring electrically connects the alternating current power output unit and the power transmitting unit to each other. The detecting unit detects a ratio between an output voltage and an output current, which are outputted from the alternating current power output unit, or a phase difference between the output voltage and the output current. On the basis of the ratio and/or the phase difference detected by means of the detecting unit, the determining unit determines whether an abnormality has generated or not in the non-contact power supply apparatus.

Claims

1. A non-contact power supplying apparatus configured to supply a primary coil with AC power to transmit power in a non-contact manner from the primary coil to a secondary coil, the non-contact power supplying apparatus comprising:

an AC power output unit capable of outputting AC power;

a power transmission unit including the primary coil;

a cable electrically connecting the AC power output unit and the power transmission unit;

a detector that detects a ratio of an output voltage and an output current output from the AC power output unit and a phase difference of the output voltage and the output current; and

a determination unit that determines whether or not an abnormality is occurring in the non-contact power supplying apparatus based on at least one of the ratio and the phase difference detected by the detector, wherein

each of the primary coil and the cable includes bundled conductive wires, and

the determination unit determines that at least one of the primary coil and the cable is partially broken when the ratio of the output current to the output voltage is a value other than zero and lower than a threshold set in advance and when the phase difference is in a specified range.

2. The non-contact power supplying apparatus according to claim 1, further comprising a control unit that controls the AC power output unit so that AC power for determining an abnormality is output when the secondary coil is not located at a position where power is receivable from the primary coil,

wherein the determination unit performs the determination based on the detection result of the detector when the AC power for determining an abnormality is output.

3. A non-contact power supplying system comprising the non-contact power supplying apparatus according to claim 1, wherein the non-contact power supplying system transmits the AC power to the secondary coil that is arranged in a vehicle and charges a vehicle battery arranged in the vehicle with the AC power received by the secondary coil.

4. A non-contact power supplying apparatus configured to supply a primary coil with AC power to transmit power in a non-contact manner from the primary coil to a secondary coil, the non-contact power supplying apparatus comprising:

an AC power output unit capable of outputting AC power;

a power transmission unit including the primary coil;

a cable electrically connecting the AC power output unit and the power transmission unit;

a detector that detects a ratio of an output voltage and an output current output from the AC power output unit and a phase difference of the output voltage and the output current; and

a determination unit that determines whether or not an abnormality is occurring in the non-contact power supplying apparatus based on at least one of the ratio and the phase difference detected by the detector, wherein

each of the primary coil and the cable includes bundled conductive wires, and

the determination unit determines that the primary coil is deformed when the ratio of the output current to the output voltage is a value other than zero and higher than a threshold set in advance and when the phase difference is outside a specified range set in advance.

5. The non-contact power supplying apparatus according to claim 4, further comprising a control unit that controls the AC power output unit so that AC power for determining an abnormality is output when the secondary coil is not located at a position where power is receivable from the primary coil,

wherein the determination unit performs the determination based on the detection result of the detector when the AC power for determining an abnormality is output.

6. A non-contact power supplying system comprising the non-contact power supplying apparatus according to claim 4, wherein the non-contact power supplying system transmits the AC power to the secondary coil that is arranged in a vehicle and charges a vehicle battery arranged in the vehicle with the AC power received by the secondary coil.