Inductive charging of a moving electric vehicle's battery

• US 5,311,973 A
• Filed: 07/31/1992
• Issued: 05/17/1994
• Est. Priority Date: 07/31/1992
• Status: Expired due to Fees

• Current Assignee: Ling-Yuan Tseng
• Original Assignee: Ling-Yuan Tseng
• Inventors: Tseng, David, Tseng, Ling-Yuan
• Primary Examiner(s): Huppert, Michael S.
• Assistant Examiner(s): LOWE, SCOTT
• Application Number:
  US07/922,741
• Time in Patent Office: 655 Days
• Field of Search: 191/10, 191/2-8, 191/14, 191/15-21, 180/165, 320/2, 194/901, 194/904, 307/9.1, 307/10.1, 246/187 R, 246/187 A, 246/187 B
• US Class Current: 191/10
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2260/32 Auto pilot mode
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• 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 53/32 by charging in short intervals along the itinerary, e.g. during short stops
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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: 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 30/12 : Remote or cooperative charging
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A battery of an electric vehicle is inductively charged while the electrical vehicle is moving, using a magnetic field along different portions of an extended linear distance and an inductive coil mounted on an electric vehicle, by having the electric vehicle, as it traverses the different portions of the extended linear distance, move within the influence of the magnetic field. An apparatus senses progress of the electric vehicle along the extended linear distance. The apparatus produces the magnetic field by a power switch bank connected to an array of inductive coils.

Claims

1. An apparatus for inductively charging a battery of an electric vehicle equipped with an inductive charging coil while the electric vehicle is moving, comprising:

means for establishing a two-way wireless communications link between said apparatus and said electric vehicle for communicating in accordance with a service protocol one or more of the following, a charging request, a customer service number, battery specific data, autopilot commands, and electronic billing information;

means for producing a magnetic field along different portions of an extended linear distance and for individually controlling a time/intensity characteristic of said magnetic field of each different portion; and

means for sensing progress of said electric vehicle along said extended linear distance.

2. The apparatus of claim 1 further comprising means responsive to said means for sensing for controlling said means for producing a magnetic field.

3. The apparatus of claim 2 further comprising means for establishing data communication between said means for controlling and said electric vehicle.

4. The apparatus of claim 3 wherein said means for producing a magnetic field comprises a power switch bank connected to an array of inductive elements controlled individually by means of said power switch bank.

5. The apparatus of claim 4 wherein said means for sensing comprises an optical car sensor array.

6. The apparatus of claim 5 wherein said means for controlling comprises a car sensor control unit coupled to said car sensor array, a high current distribution control unit coupled to said power switch bank, and a central control unit coupled to said car sensor control unit and said high current distribution control unit.

7. A method of inductively charging a battery of an electric vehicle while the electric vehicle is moving, using a charging system including means for producing a magnetic field along different portions of an extended linear distance and an inductive coil mounted on said electric vehicle, the method comprising the steps of:

establishing a two-way wireless communications link between the charging system and the electric vehicle;

exchanging information between the charging system and the electric vehicle across said two-way wireless communications link in accordance with a service protocol regarding one or more of the following, a charging request, a customer service number, battery specific data, autopilot commands, and electronic billing information; and

having said electric vehicle, as it traverses different portions of said extended linear distances, move within the influence of said magnetic field.

8. The method of claim 7 further comprising:

controlling said magnetic field in accordance with information exchanged during said exchanging step.

9. The method of claim 7 further comprising:

using said two-way wireless communications link, performing electronic billing with respect to charging the battery of the electric vehicle.

10. The method of claim 7 wherein exchanging information comprises:

sending a charging request from the electric vehicle to the charging system; and

receiving from the charging system a customer service number.

11. The method of claim 10 further comprising:

verifying the identity of the electric vehicle by requesting the customer service number from the electric vehicle.

12. The method of claim 10 wherein said charging request includes data from which a charging pattern individualized for said electric vehicle may be determined.

13. The method of claim 12 comprising the further step of varying said magnetic field in accordance with said charging pattern.

14. The method of claim 7 comprising the further step of optically sensing progress of said electric along said extended linearly distance.

15. The method of claim 14 further comprising the step of controlling movement of said electric vehicle by issuing auto-pilot commands from said charging system to said electric vehicle.

16. The method of claim 14 further comprising the step of sending display data from said charging system to said electric vehicle representing a position of said electric vehicle relative to a desired position.

17. The method of claim 7 comprising the further steps of:

during said exchanging step, exchanging an individualized battery charging pattern;

sensing progress of said electric vehicle along said extended linear distance; and

energizing individual ones of said charging elements in synchronism with the progress of said electric vehicle and in accordance with said individualized battery charging pattern.