Storage battery charging apparatus and methods

• US 5,963,013 A
• Filed: 04/29/1997
• Issued: 10/05/1999
• Est. Priority Date: 04/29/1997
• Status: Expired due to Fees

• Current Assignee: James L. Watson, Janet C. Watson
• Original Assignee: James L. Watson, Janet C. Watson
• Inventors: Watson, James L., Watson, Janet C.
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): Toatley, Gregory J.
• Application Number:
  US08/848,284
• Time in Patent Office: 889 Days
• Field of Search: 320/116, 320/117, 320/DIG. 34, 320/107, 307/10.1, 280/414.1, 324/426
• US Class Current: 320/107
• CPC Class Codes: B60L 1/006 to power outlets
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An apparatus and method for charging a battery in a transported apparatus from the electrical system of a transporting vehicle. In one aspect of the invention there is provided circuit means for determining when a battery has been sufficiently recharged, adapted to be respectively coupled to both the battery of the transported apparatus and the electrical system of the transporting vehicle. The circuit means may include means for determining the status of the battery being charged such as a meter, an array of lights, or an array of light emitting diodes, the number and sequence of illumination being indicative of the extent to which the battery has been recharged.

Claims

1. Apparatus for charging the battery of a transportation device from the electrical system of a transporting vehicle, said device having an outlet coupled to said battery and said transporting vehicle having an outlet coupled to said electrical system comprising:

coupling means attached to the transporting vehicle;

coupling means attached to the transported device;

connecting apparatus for joining the two coupling means thereby connecting the transporting vehicle electrical system and the transported device battery;

a first electrical conductor coupled to a housing having first and second inputs, adapted for coupling to said transported device outlet;

a second electrical conductor coupled to the housing second input, adapted for coupling to said transporting vehicle outlet;

circuit means, disposed inside said housing means;

switch means coupled between circuit means and said second input operable to isolate said second electrical conductor from said circuit means; and

a display means being visible from outside said housing, coupled to said circuit means;

said display means indicating the extent to which said transported device battery has been recharged.

2. The apparatus of claim 1 wherein the transported device is carried on or within the transporting vehicle.

3. The apparatus of claim 1 wherein the transported device is carried on a trailer towed by the transporting vehicle.

4. The apparatus of claim 1 wherein the transported device is towed by the transporting vehicle.

5. The apparatus of claim 1 wherein the transported device is a boat.

6. The apparatus of claim 1 wherein the transported device is a golf cart.

7. The apparatus of claim 1 wherein the transported device is a wheelchair.

8. The apparatus of claim 1 wherein the transported device is farm equipment.

9. The apparatus of claim 1 wherein the transported device is a welder.

10. The apparatus of claim 1 wherein the transported device is a compressor.

11. In combination with a towing vehicle provided with an operating electrical system having a means for generating voltage;

a battery charging system including a battery to be charged operably connected to a trailer or device carried thereby towed by the towing vehicle comprising a battery charging circuit for interconnecting the electrical system of the trailer or device carried thereby with a terminal of the voltage source supplying a battery charging voltage and a ground terminal;

a voltage measuring circuit for determining the charged condition of a battery connected thereto and for alternately determining the charging voltage of the system, said voltage measuring circuit including an electrical load resistance provided with an adjustable tap having a first terminal connected to said charging circuit and a second terminal connected to a grounded terminal of the towing vehicle through a switch means and a meter mechanism for providing a visual indication of the voltage of said charging system, said meter mechanism having a first terminal connected to said first terminal of said resistance and a second terminal connected to the adjustable tap of said resistance, said adjustable tap being positioned on said resistance to provide a meter indication proportional to the voltage of said charging system, said second terminal of said meter mechanism being connected to the adjustable tap of said resistance through a diode.

12. In combination with a transporting vehicle provided with an operating electrical system having a means for generating voltage;

a battery charging system for a battery carried by a device or operably connected to a towed trailer or a device carried thereby and the battery to be charged having a voltage substantially less than that of the electrical system of the transporting vehicle, comprising a charging circuit including an electrical resistance connected in series with a terminal of the battery to be charged for reducing the voltage supplied by said charging system to that required for charging of said battery;

a voltage measuring circuit and a switch means for alternately connecting said voltage measuring circuit with the battery to be charged to determine the charged condition thereof and for connecting said charging circuit to the battery for charging and to said voltage measuring circuit for determining the charging voltage of the system, said voltage measuring circuit including an electrical load resistance provided with an adjustable tap having a first terminal connected to a common terminal of said charging resistance and of the batten to be charged and a second terminal connected to a ground terminal through said switch means and a switch contact for momentarily completing a circuit therethrough, and a meter mechanism for providing a visual indication of the voltage of said charging system, said meter mechanism having a first terminal connected by said switch means to said common terminal and a second terminal connected to said adjustable tap by said switch means through a diode, said adjustable tap being positioned on said resistance to provide a meter indication proportional to the voltage of the charging system or of the battery being charged.

13. The combination of claim 12 in which said voltage measuring circuit includes a second electrical load resistance provided with an adjustable tap having a first terminal connected to said first terminal of the meter mechanism and a second terminal connected to said ground terminal through said switch means and said switch contact, said second terminal of the meter being connected to said adjustable tap by said switch means through a diode, said switch means being operable to disconnect said charging circuit from said voltage source and to disconnect said first voltage measuring circuit therefrom and to connect said second voltage measuring circuit to said voltage source whereby the charged condition of the battery of the transporting vehicle may be determined or to determine the charging voltage supplied thereto.

14. A method for charging the battery of a device from the electrical system of a vehicle, said device having an outlet coupled to said battery and said vehicle having an outlet coupled to said electrical system comprising the steps of:

providing coupling means attached to the vehicle;

providing coupling means attached to the device;

connecting the two coupling means thereby connecting the vehicle electrical system and the device battery;

providing a first electrical conductor coupled to a housing having first and second inputs, adapted for coupling to said device outlet;

providing a second electrical conductor coupled to the housing second input, adapted for coupling to said vehicle outlet;

disposing a circuit means inside said housing means;

coupling a switch means between the circuit means and said second input operable to isolate said second electrical conductor from said circuit means; and

coupling a display means so as to be visible from outside said housing, to said circuit means;

said display means capable of indicating the extent to which said device battery has been recharged.

15. The method of claim 14 wherein the device is transported on or within the transporting vehicle.

16. The method of claim 14 wherein the device is transported on a trailer towed by the transporting vehicle.

17. The method of claim 14 wherein the device is towed by the transporting vehicle.

18. The method of claim 14 wherein the device is a boat.

19. The method of claim 14 wherein the device is a golf cart.

20. The method of claim 14 wherein the device is a wheelchair.

21. The method of claim 14 wherein the device is farm equipment.

22. The method of claim 14 wherein the device is a welder.

23. The method of claim 14 wherein the device is a compressor.