Multiple Redundant Solar Power System

• US 20130271062A1
• Filed: 03/14/2013
• Published: 10/17/2013
• Est. Priority Date: 04/17/2012
• Status: Active Grant

• Current Assignee: Dar Yun Energy Science Technology Co., Ltd.
• Original Assignee: Dar Yun Energy Science Technology Co., Ltd.
• Inventors: LU, YUNG-CHI
• Granted Patent: US 9,130,404 B2
• Time in Patent Office: Days
• US Class Current: 320/101
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• 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: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

A multiple redundant solar power system comprises a primary solar power set, a secondary solar power set, a first control unit, and a second control unit. The primary solar power set includes a first solar panel, a first battery, and a first electrical output line. The secondary solar power set includes a second solar panel, a second battery, and a second electrical output line. The first control unit is connected between the first battery and the second battery. When the first battery has a low voltage, electrical power can be supplied from the second battery to the first battery. The second control unit is connected between the first battery and an external electrical power source. When the second battery has a low voltage, electrical power can be supplied from the external electrical power source to the first battery.

Claims

1. A multiple redundant solar power system, comprising:

a primary solar power set including a first solar panel, a first battery electrically connected to the first solar panel, and a first electrical output line connected to the first battery;

a secondary solar power set including a second solar panel, a second battery electrically connected to the second solar panel, and a second electrical output line connected to the second battery;

a first control unit, capable of detecting a low voltage of the first battery, connected between the first battery and the second battery such that, when the first battery has a low voltage, the first control unit can react to the detection and form a closed electrical connection between the first battery and the second battery to allow electrical power to be supplied from the second battery to the first battery; and

a second control unit, capable of detecting a low voltage of the second battery, connected between the first battery and an external electrical power source such that, when the second battery has a low voltage, the second control unit can react to the detection and form a closed electrical connection between the first battery and the external electrical power source to allow electrical power to be supplied from the external electrical power source to the first battery.

2. The multiple redundant solar power system of claim 1, wherein when the second battery has a low voltage causing the second control unit to form a closed electrical connection between the external electrical power source and the first battery, the second control unit can issue an opening signal to the first control unit to open the electrical connection between the first battery and the second battery, so that the electrical power supplying from the second battery to the first battery can be stopped.

3. The multiple redundant solar power system of claim 1, wherein the first control unit includes a first switch device and a first controller, the first switch device being connected between the first battery and the second electrical output line connected to the second battery, the first controller being capable of detecting a low voltage of the first battery and thus issuing a closing signal to the first switch device, and wherein the first control unit further includes an ac-to-dc converter connected between the first switch device and the first battery.

4. The multiple redundant solar power system of claim 3, wherein the second control unit includes a second switch device and a second controller, the second switch device being connected between the first battery and the external electrical power source, the second controller being capable of detecting a low voltage of the second battery and thus issuing a closing signal to the second switch device, the second switch device being capable of issuing an opening signal to the first switch device.

5. The multiple redundant solar power system of claim 4, wherein the second control unit further includes an ac-to-dc converter connected between the second switch device and the first battery.

6. The multiple redundant solar power system of claim 1, wherein the first electrical output line of the primary solar power set is provided with a first dc-to-ac converter.

7. The multiple redundant solar power system of claim 1, wherein the second electrical output line of the secondary solar power set is provided with a second dc-to-ac converter.

8. The multiple redundant solar power system of claim 1, further comprising an electrical further-charging control unit including a charging control switch and a forwardly biased diode electrically connected with the charging control device, the charging control switch being electrically connected to the first battery,the forwardly biased diode being electrically connected to the second battery, the first control unit being capable of issuing a closing signal to the charging control switch to allow electrical power to be further supplied from the first battery to the second battery when the external electrical power source charges the first battery

9. The multiple redundant solar power system of claim 1, wherein the primary solar power set further includes a third solar panel, a third switch device electrically connected between the third solar panel and the first battery, and a third controller capable of detecting a low voltage of the first battery and thus issuing a closing signal to the third switch device to allow the third solar panel to charge the first battery.

10. The multiple redundant solar power system of claim 1, wherein the secondary solar power set further includes a fourth solar panel, a fourth switch device electrically connected between the fourth solar panel and the second battery, and a fourth controller capable of detecting a low voltage of the second battery and thus issuing a closing signal to the fourth switch device to allow the fourth solar panel to charge the second battery.