System for charging electrically powered automated guided vehicles

• US 8,471,522 B2
• Filed: 05/06/2011
• Issued: 06/25/2013
• Est. Priority Date: 05/06/2011
• Status: Active Grant

• Current Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Virk, Raman
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): OMAR, AHMED H
• Application Number:
  US13/102,090
• Publication Number:
  US 20120282065A1
• Time in Patent Office: 781 Days
• Field of Search: 320/104
• US Class Current: 320/104
• CPC Class Codes: B60L 2200/44 Industrial trucks or floor conveyors
• CPC Class Codes: B60L 2260/32 Auto pilot mode
• CPC Class Codes: B60L 50/52 characterised by DC-motors
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B66F 9/063 Automatically guided
• CPC Class Codes: Y02P 90/60 Electric or hybrid propulsion means for production processes
• 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 90/14 Plug-in electric vehicles

Abstract

A system for periodically charging an electrically powered automated guided vehicle includes a charging station positioned adjacent a predetermined route of the automated guided vehicle. The charging station includes a charging arm which is selectively movable between a stowed position and a charge position in which the charging arm engages with the automated guided vehicle to perform a charging operation. The charging station is dimensioned and positioned so as to be positioned underneath a bottom surface of a platform connected to the automated guided vehicle and between a side edge of the platform and the automated guided vehicle.

Claims

1. A system for charging an electrically powered automated guided vehicle that transports a load in a facility, said system comprising:

an automated guided vehicle following a predetermined route along a floor of the facility, the automated guided vehicle having a pair of vehicle terminals positioned on one side of said automated guided vehicle;

a platform for supporting the load, said platform positioned above automated guided vehicle; and

a charging station positioned adjacent said predetermined route, said charging station having a charging arm selectively moveable between a stowed position and a charge position to charge said automated guided vehicle;

said charging arm having charging terminals, said charging arm positioned beneath said platform when said automated guided vehicle is at said charging station, said charging arm moves from said stowed position to said charge position such that said charging terminals engage said vehicle terminals.

2. The system of claim 1, wherein said platform includes a work surface for supporting the load, an opposite bottom surface facing the floor, and a pair of side edges, said automated guided vehicle connected to said platform at said bottom surface and between said pair of side edges of said platform.

3. The system of claim 2, wherein said automated guided vehicle stops at said charging station along said predetermined route such that said charging station is positioned underneath said bottom surface of said platform and between one of said pair of side edges and said automated vehicle, and wherein said charging arm moves from said stowed position to said charge position underneath said bottom surface of said platform to engage said charging terminals with said vehicle terminals to charge said automated guided vehicle.

4. The system of claim 3, wherein a height of said charging arm in said charge position is less than a distance between said bottom surface of said platform and the floor.

5. The system of claim 4, wherein the distance between said bottom surface of said platform and the floor is generally 15 centimeters.

6. The system of claim 1, wherein said charging station includes a base, an actuator, and a pair of brackets, wherein said pair of brackets pivotally attaches said charging arm to said base, said actuator selectively moves said charging arm between said stowed position and said charge position.

7. The system of claim 1, wherein said system further includes a processor connected to said charging station to control the movement of said charging arm;

and

a sensor connected to said processor, said sensor generates a first signal which indicates the presence of the automated guided vehicle at said charging station;

wherein said processor actuates the charging arm from said stowed position to said charge position to charge the automated guided vehicle upon receipt of said first signal.

wherein said processor is programmed to actuate the charging arm from said charge position to said stowed position at the end of a predetermined time period.

8. The system of claim 7, wherein said charging station is positioned at a work station disposed along the predetermined route, said automated guided vehicle stopping at said work station in order to undergo an operation on the load, and wherein said charging station is positioned underneath said bottom surface of said platform and between one of said pair of side edges and said automated guided vehicle when said automated guided vehicle is stopped at said work station.

9. The system of claim 8, wherein said processor is connected to said work station, and wherein said processor is programmed to actuate the charging arm from said charge position upon receipt of a second signal from said work station indicating the completion of the operation on the load.

10. The system of claim 9, wherein said second signal is generated by an input device, said input device being actuated by a user upon completion of said operation.

11. The system of claim 9, wherein said second signal is generated by said work station upon expiration of a predetermined time period.

12. The system of claim 1, wherein said charging station performs a maintenance charge of the automated guided vehicle to maintain a predetermined level of charge on the automated guided vehicle.

13. The system of claim 1, wherein said platform includes at least one wheel positioned adjacent to each of said pair of sides, and wherein said charging station is positioned between an inner side of one of said wheels and said automated guided vehicle when said automated guided vehicle is stopped at said charging station.

14. The system of claim 9, wherein said automated guided vehicle stops at a plurality of work stations along said predetermined route, each work station having a charging station to charge said automated guided vehicle while stopped at said work station.