Solar powered golf cart

• US 4,744,430 A
• Filed: 08/14/1987
• Issued: 05/17/1988
• Est. Priority Date: 08/14/1987
• Status: Expired due to Fees

• Current Assignee: Thomas R. Mccoy
• Original Assignee: Thomas R. Mccoy
• Inventors: McCoy, Thomas R.
• Primary Examiner(s): Weisstuch, Aaron
• Application Number:
  US07/085,156
• Time in Patent Office: 277 Days
• Field of Search: 136/291, 136/293, 224/274, 280/DIG. 5, 320/2, 320/20, 320/61, 180/2.2, 180/65.3, 323/906
• US Class Current: 180/2.2
• CPC Class Codes: B60L 2200/22 Microcars, e.g. golf cars
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 8/00 Electric propulsion with power supply from forces of nature, e.g. sun or wind
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y10S 136/291 Applications
• CPC Class Codes: Y10S 136/293 Circuits
• CPC Class Codes: Y10S 280/05 Motorized golf carts
• CPC Class Codes: Y10S 323/906 Solar cell systems

Abstract

A solar cell array is disclosed having a support structure, cover, and mechanically joined solar cell panels. Each panel, or group of panels, is electrically connected across a separate battery and a diode is provided to provide separate charging of each battery and to prevent flow of current to the solar cells from the batteries.

Claims

1. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly for providing electrical energy comprising:

a plurality of batteries;

a solar cell array having a plurality of solar cell panels;

said solar cell array connected to supply electricity to said batteries;

each of said panels having a flexible substrate facilitating the positioning of said panel is other than a planar configuration;

each of said substrates having a rectilinear configuration defined by edges and said substrates mechanically joined along abutting edges to form a rectilinear array having a peripheral margin;

a fabric covering extending beneath said rectilinear array and enclosing said peripheral margin of said array; and

a support structure beneath said fabric covering having a plurality of longitudinal supports connected by a plurality of lateral supports.

2. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 1 wherin:

fabric strips are used to mechanically join said substrates; and

said fabric strips are joined to said fabric covering.

3. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 2 wherein:

said fabric strips and said fabric covering are fabricated of canvas resistant to ultraviolet light.

4. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 1 wherein:

said fabric covering is joined to a plurality of said longitudinal supports.

5. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 1 wherein:

said fabric covering has a canopy portion dependent from said peripheral margin.

6. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 1 wherein:

said plurality of batteries are connected in series;

each of said batteries having a positive and a negative terminal;

each of said solar cell panels having a positive and a negative terminal;

each of said solar cell panels connected across the terminals of a different said battery;

a diode is connected between each said panel and its respective battery to permit current flow only from each said panel to each said respective battery.

7. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 1 wherein:

said plurality of batteries are connected in series;

each of said batteries having a positive and a negative terminal;

said plurality of solar cell panels are arranged in a plurality of groups;

each of said solar cell panels having a positive and a negative terminal;

each of said plurality of solar cell panels in each group is connected in parallel and each of said groups is connected across the terminals of a different said battery; and

a diode is connected between each said group and its respective battery to permit current flow only from each said group to each said respective battery.

8. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 1 further including:

a thermal insulation sheet positioned between said rectilinear array and said fabric covering.

9. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly for providing electrical energy comprising:

a plurality of batteries connected in series;

each of said batteries having a positive and a negative terminal;

a solar cell array having a plurality of solar cell panels;

each of said solar cell panels having a positive and a negative terminal;

each of said solar cell panels connected across the terminals of a different said battery; and

a diode connected between each panel and its respective battery to permit current flow only from said panel to its respective battery.

10. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 9 wherein:

each of said panels has a flexible substrate facilitating the positioning of said panel in other than a planar configuration;

each of said substrates has a rectilinear configuration defined by edges and said substrates mechanically joined along abutting edges to form a rectilinear array having a peripheral margin.

11. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 10 further including:

a heat insulating sheet positioned beneath said rectilinear array;

a fabric covering extending beneath said heat insulating sheet and enclosing said peripheral margin of said array

a support structure beneath said fabric covering having a plurality of longitudinal supports connected by a plurality of lateral supports; and

a voltage indicating device connected across said batteries.

12. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 9 wherein:

said solar cell array has a plurality of groups of a plurality of solar cell panels; and

each of said groups of solar cell panels is connected across the terminals of a different said battery.

13. In a vehicle having a propulsion motor powered by electrical energy, a battery and solar cell assembly in accordance with claim 12 wherein:

said plurality of solar cell panels in each group are connected in parallel.

14. A solar cell powered battery charging system comprising:

a series string of n rechargable batteries;

n groups of solar cell panels;

each of said groups having m solar panels connected in parallel;

each of said n rechargable batteries having a different one of said n groups of solar cell panels connected across it; and

a diode connected between each of said groups of solar cell panels and its respective battery permitting current flow only in the direction from said solar cell panel groups to said batteries.