Battery charging and transfer system

• US 5,549,443 A
• Filed: 01/06/1994
• Issued: 08/27/1996
• Est. Priority Date: 01/06/1994
• Status: Expired due to Fees

• Current Assignee: Unlimited Range Electric Car Systems Company
• Original Assignee: Unlimited Range Electric Car Systems Company
• Inventors: Hammerslag, Julius G.
• Primary Examiner(s): Werner, Frank E.
• Application Number:
  US08/178,101
• Time in Patent Office: 964 Days
• Field of Search: 414/786, 414/351, 414/345, 414/343, 414/340, 414/390, 414/391, 414/395, 414/396, 414/392, 414/393, 414/398, 414/399, 414/400, 414/401, 414/572, 104/34, 320/2, 320/43, 320/48, 180/68.5
• US Class Current: 414/809
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60L 53/80 Exchanging energy storage elements, e.g. removable 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

Abstract

A battery transfer and charging system for electric vehicles. A displacement station removes spent batteries of electric vehicles by forcing charged batteries into position within the vehicles so as to laterally displace spent batteries. Spent batteries displaced from vehicles are received by a receiving station of the system. The receiving system includes an engagement device for engaging with engagement structures of the batteries, in order to assist the removal of spent batteries. Spent batteries removed from vehicles are tested and charged as they progress through the system in an assembly-line fashion. Following recharge, batteries are conveyed to the displacement station for installation within later vehicles. Batteries which cannot adequately be recharged are automatically removed from the system. In one embodiment of the system, vehicles drive through the system in sequential order, stopping at a specified location for battery installation/removal.

Claims

1. A method of replacing an electric battery in an electrically powered passenger vehicle, comprising the steps of:

providing a battery transfer station having at least one drive-through bay for receiving an electric passenger vehicle therein, said transfer station having a battery conveyor loop which extends from a first side of the vehicle to a second side of the vehicle when the vehicle is positioned within the bay, a portion of the conveyor loop being elevated or lowered relative to a vehicle level to allow passenger vehicles to pass below or above the conveyor loop, said conveyor loop including an exchange station for conveying a discharged battery out of the vehicle and for conveying a charged battery into the vehicle, said conveyor loop having at least one charging station;

positioning the electric passenger vehicle within the bay, the vehicle having a discharged battery therein, said step of positioning comprising driving the vehicle into an entrance end of the bay;

conveying the discharged battery from a compartment of the vehicle along the conveyor loop to the charging station, the compartment extending through the vehicle from said first side to said second side such that the compartment and said conveyor loop form a closed-loop transfer path when the vehicle is positioned within the bay;

conveying a charged battery along the conveyor loop into the compartment; and

removing the vehicle from the bay in the transfer station, said step of removing comprising driving the vehicle from an exit end of the bay.

2. A method as in claim 1, wherein said step of conveying the discharged battery from the compartment comprises engaging the discharged battery with the conveyor loop and conveying the discharged battery out of the compartment.

3. A method as in claim 1, wherein said step of conveying the discharged battery from the compartment comprises displacing the discharged battery with the charged battery.

4. A method as in claim 3, wherein said displacing step comprises conveying a charged battery into the compartment from a first side thereof until said charged battery contacts the discharged battery, and advancing the charged battery to forcibly move the discharged battery out of the compartment.

5. A method as in claim 1, wherein said step of conveying a charged battery into the compartment comprises automatically establishing electrical connection of the charged battery to a circuit of the vehicle.

6. A method as in claim 1, further comprising the step of automatically charging the discharged battery at the charging station.

7. A method as in claim 1, further comprising the step of automatically testing the discharged battery at a testing station on the conveyor loop.

8. A method as in claim 1, further comprising the step of adding a capacity enlarging module to the conveyor loop to thereby increase the battery capacity of the conveyor loop.

9. A method of establishing a continuous, battery transfer loop and replacing a battery in a vehicle, comprising the steps of:

providing a vehicle having a first battery, said first battery positioned in a compartment having a battery installation opening on a first side of the vehicle and a battery exit opening on a second side of the vehicle;

engaging the vehicle with a battery transfer station, said battery transfer station including a battery conveyor which extends between said first and second sides of the vehicle when the vehicle is engaged with the battery transfer station, thereby establishing a continuous battery transfer loop between the battery exit opening on the vehicle and the battery installation opening on the vehicle;

advancing a second battery along said continuous battery transfer loop, through said battery installation opening on the first side of the vehicle and into said compartment;

advancing said first battery from said compartment through said battery exit opening and along said continuous battery transfer loop; and

disengaging the vehicle from the battery transfer station, with said second battery in said compartment and said first battery in said battery transfer station;

wherein said step of engaging and/or said step of disengaging comprises driving said vehicle above or below a portion of said conveyor.

10. A method as in claim 9, wherein said advancing said first battery step includes the step of pushing said first battery through said battery exit opening with said second battery.

11. A method as in claim 9, further comprising the step of advancing said first battery along said continuous battery transfer loop to a battery charging station, and charging said first battery.

12. A method for the high speed, continuous, efficient replacement of discharged batteries in passenger vehicles with charged batteries, comprising the steps of:

providing a battery transfer station, having

a drive through vehicle bay having an entrance on a first end thereof and an exit on a second end thereof to permit the vehicle to enter the bay, stop within the bay, and exit from the bay along a predetermined path without reversing direction;

a continuous battery transfer conveyor, having a battery receiving end at a first side of the bay and a battery delivery end at a second side of the bay;

at least one battery charging station on the battery transfer conveyor between the battery receiving end and the battery delivery end; and

a vertically displaced section of the conveyor, for permitting the conveyor to cross the predetermined path and to place the battery receiving end in communication with the battery delivery end by way of the conveyor without preventing the vehicle from advancing along the predetermined path;

advancing a vehicle along the predetermined path and into the bay, said vehicle having a discharged battery in a battery compartment therein, said battery compartment having a battery exit opening on one side of the vehicle, and a battery installation opening on another side of the vehicle;

establishing a continuous, closed battery transfer loop from the battery compartment, out the battery exit opening on the vehicle and onto the battery receiving end of the conveyor, along the conveyor to the delivery end, from the conveyor delivery end through the battery installation opening on the vehicle and into the battery compartment;

conveying the discharged battery from the battery compartment of the vehicle out through the battery exit opening and onto the battery receiving end of the conveyor; and

conveying a charged battery along the conveyor, off of the conveyor delivery end, through the battery installation opening and into the battery compartment in the vehicle.

13. A method as in claim 12, further comprising the step of advancing the discharged battery along the conveyor and into a battery charging station thereon.

14. A method as in claim 13, further comprising the step of advancing a battery from the battery charging station along the conveyor and into the battery compartment in the vehicle.

15. A method as in claim 14, wherein the conveyor comprises a battery testing station thereon for testing batteries advanced along the conveyor, the method further comprising the steps of:

advancing the discharged battery along the conveyor and into the battery testing station;

testing the battery in the battery testing station to assess suitability to receive a charge; and

based upon the results of the test, either advancing the battery along the conveyor to the charging station, or removing the battery from the conveyor.

16. A method as in claim 12, wherein said step of conveying the discharged battery from the battery compartment comprises displacing the discharged battery with the charged battery.