Solar powered DC load system

• US 7,847,512 B2
• Filed: 03/17/2009
• Issued: 12/07/2010
• Est. Priority Date: 03/20/2008
• Status: Expired due to Fees

• Current Assignee: Min Carroll
• Original Assignee: Min Carroll
• Inventors: Carroll, Min
• Primary Examiner(s): Tso; Edward
• Assistant Examiner(s): Fantu; Yalkew
• Application Number:
  US12/381,871
• Publication Number:
  US 20090236911A1
• Time in Patent Office: 630 Days
• Field of Search: 320/135, 320/134, 320/101
• US Class Current: 320/101
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: H02S 10/00 PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

The solar powered direct current (DC) load system is a reliable, versatile and user friendly system; it uses solar energy and rechargeable battery powering at least one type of DC load which are: a type of motor operation such as water pump and a type of at least one LED; the system comprises a battery discharge control circuit and a battery output circuit for DC load (FIG. 1), at least one rechargeable battery source (42-F1) which is protected by a preset voltage that limits the lowest discharge level, the circuits in the FIG. 1 are able to combine the circuits in FIG. 2 and FIG. 3 which enable operations of the day time and night time DC load to synchronize the day and night cycles; FIG. 4 is a combination system which incorporates circuits in the FIG. 1 and FIG. 2 to create a water pumping system combined an illumination system which can turn on and off automatically; FIG. 4a with a switch and additional LEDs in addition to the FIG. 4; FIG. 5 is a combination system that incorporates circuits in the FIG. 1 and FIG. 3 to create a water pumping system that works during the day and shuts down at night automatically; FIG. 5a with a switch in addition to the FIG. 5; FIG. 6 is a combination system which incorporates FIG. 1 and FIG. 2 circuits to create an illumination system that has at least one LED which can turn off in the morning and turn on at the evening automatically.

Claims

1. Rechargeable battery protection circuits, comprising:

(a) a battery discharge control circuit comprising a preset voltage that is determined by components of at least one diode, a zener diode, and an input of a normally open solid state relay a nominal voltage that is nominated by at least one rechargeable battery source;

wherein said components within said preset voltage are connected to each other in series then coupled to the at least one rechargeable battery source in parallel;

wherein said preset voltage is substantially equal to or greater than said nominal voltage of said rechargeable battery source,

wherein said zener diode is able to be replaced by a substitutive component;

wherein said preset voltage means when the input voltage drops out of the low end control range of the input of the normally open solid state relay and reaches the preset voltage level, an output of the normally open solid state relay opens up and disconnects at least one type of DC (direct current) load to access the rechargeable battery source, the preset voltage is the lowest level that the rechargeable battery source is discharged;

wherein said rechargeable battery source includes at least one rechargeable battery or at least one rechargeable battery pack; and

(b) a battery output circuit for DC load comprising at least one rechargeable battery source of said battery discharge control circuit, and is connected in parallel to a diode, the output of said normally open solid state relay of said battery discharge control circuit, and at least one type of the DC load which includes a type of motor operation having water pump and a type of at least one LED directly or indirectly connected in series to the negative pole/terminal of said output of said normally open solid state relay;

wherein said input of said normally open solid state relay is able to be replaced by an input of a functionally interchangeable device, where each of said solid state relay or said functionally interchangeable device has the input of positive and negative control poles/terminals, and the output of positive and negative poles/terminals, said output of said normally open solid state relay is able to be replaced by said output of said functionally interchangeable device; and

wherein said battery discharge control circuit or said battery output circuit for DC load is able to combine with additional circuit(s) or component(s) respectively.

2. The rechargeable battery protection circuits of claim 1, wherein said substitutive component further comprising a light emitting diode.

3. The rechargeable battery protection circuits of claim 1, wherein said functionally interchangeable device for said normally open solid state relay further comprising an I/O, input/output, module.

4. The rechargeable battery protection circuits of claim 1, wherein said functionally interchangeable device for said normally open solid state relay further comprises a normally open relay.

5. The rechargeable battery protection circuits of claim 1, wherein said functionally interchangeable device for said normally open solid state relay further comprises an opto-coupler.

6. The rechargeable battery protection circuits of claim 1, wherein said functionally interchangeable device for said normally open solid state relay further comprises an opto-isolator.

7. The rechargeable battery protection circuits of claim 1, wherein said substitute component for said zener diode further comprises a resistor.

8. Rechargeable battery protection circuits, comprising:

(a) a battery discharge control circuit comprising a voltage across elements of an input of a normally open solid state relay and a zener diode, said voltage across elements connected to each other in series then coupled to a rechargeable battery source in parallel,

wherein said voltage across elements determined a preset voltage that is substantially equal to or greater than nominal voltage of said rechargeable battery source,

wherein said preset voltage means that when an input voltage drops out of the low end control range of the input of the normally open solid state relay and reaches the preset voltage level, an output of the normally open solid state relay disconnects at least one direct current load to access the rechargeable battery source, the preset voltage is at the lowest level that the rechargeable battery source is discharged;

wherein said input of said normally open solid state relay is able to be replaced by an input of a functionally interchangeable device, where each of said solid state relay or said functionally interchangeable device has input of positive and negative control poles/terminals, and output of positive and negative poles/terminals, said output of said normally open solid state relay is able to be replaced by said output of said functionally interchangeable device;

wherein said zener diode is able to be replaced by a substitutive element;

(b) a battery output circuit for DC load comprising a rechargeable battery source of said battery discharge control circuit, and is connected in parallel directly or indirectly to the positive pole/terminal of said output of said normally open solid state relay of said battery discharge control circuit, the negative pole/terminal of said output of said normally open solid state relay is connected in series directly or indirectly to said at least one direct current load,

wherein said rechargeable battery source includes at least one rechargeable battery or at least one rechargeable battery pack; and

wherein said battery discharge control circuit or said battery output circuit for the DC load is able to combine with additional circuit(s) or element(s) respectively.

9. The rechargeable battery protection circuits of claim 8 wherein said functionally interchangeable device for said solid state relay further comprises an I/O, input/output, module.

10. The rechargeable battery protection circuits of claim 8, wherein said functionally interchangeable device for said solid state relay further comprises a normally open relay.

11. The rechargeable battery protection circuits of claim 8, wherein said functionally interchangeable device for said solid state relay further comprises an opto-coupler.

12. The rechargeable battery protection circuits of claim 8, wherein said functionally interchangeable device for said solid state relay further comprises an opto-isolator.

13. The rechargeable battery protection circuits of claim 8, wherein said substitutive element for said zener diode further comprises a light emitting diode.

14. The rechargeable battery protection circuits of claim 8, wherein said substitutive element for said zener diode further comprises a resistor.