JUNCTION BOX

• US 20120274389A1
• Filed: 06/01/2011
• Published: 11/01/2012
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Ampower Technology Co., Ltd.
• Original Assignee: Ampower Technology Co., Ltd.
• Inventors: GER, CHIH-CHAN, WANG, YUN-BING
• Granted Patent: US 8,569,612 B2
• Time in Patent Office: Days
• US Class Current: 327/504
• CPC Class Codes: H01L 31/044 including bypass diodes bypass diodes in the junction box H02S40/34
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A junction box electronically connected to a solar panel and connected to a plurality of solar cell strings connected in series includes a first bypass diode string and at least one second bypass diode. The first bypass diode string includes a plurality of first bypass diodes forwardly connected in series, and each of the plurality of first bypass diodes is connected to a corresponding one of the plurality of solar cell strings in parallel. The at least one second bypass diode connected to at least two neighboring solar cell strings in parallel, turns on to bypass the at least two neighboring solar cell strings upon the condition that the at least two neighboring solar cell strings are abnormal simultaneously.

Claims

1. A junction box, electronically connected to a solar panel and connected to a plurality of solar cell strings connected in series, the junction box comprising:

a first bypass diode string, comprising a plurality of first bypass diodes forwardly connected in series, wherein each of the plurality of first bypass diodes is connected to a corresponding one of the plurality of solar cell strings in parallel; and

at least one second bypass diode, connected to at least two neighboring solar cell strings in parallel, wherein the at least one second bypass diode turns on to bypass the at least two neighboring solar cell strings upon the condition that the at least two neighboring solar cell strings are abnormal simultaneously.

2. The junction box of claim 1, further comprising two output ports connected to two ends of the first bypass diode string, to output power generated by the plurality of solar cell strings.

3. The junction box of claim 2, wherein the two output ports comprises a positive port and a negative port, the positive port is connected to a cathode of the first bypass diode string, and the negative port is connected to an anode of the last bypass diode string.

4. A junction box, electronically connected to a solar panel and connected to a plurality of solar cell strings connected in series, the junction box comprising:

a first bypass diode string, comprising a plurality of first bypass diodes forwardly connected in series, wherein each of the plurality of first bypass diodes is connected to a corresponding one of the plurality of solar cell strings in parallel; and

at least one second bypass diode, connected to at least two neighboring first bypass diodes in parallel, wherein a cathode of the at least one second bypass diode is connected to a cathode of a first one of the least two neighboring first bypass diodes, and an anode of the at least one second bypass diode is connected to an anode of a last one of the least two neighboring first bypass diodes.

5. The junction box of claim 4, further comprising two output ports connected to two ends of the first bypass diode string, to output power generated by the plurality of solar cell strings.

6. The junction box of claim 5, wherein the two output ports comprises a positive port and a negative port, the positive port is connected to a cathode of the first bypass diode string, and the negative port is connected to an anode of the last bypass diode string.

7. A junction box, electronically connected to a solar panel, and connected to a plurality of solar cell strings connected in series, a junction of any two neighboring solar cell strings forming a junction node, two ends of the plurality of serially connected solar cell strings acting as two output ports of the junction box, the junction box comprising a plurality of bypass diodes each of which either connecting one of the junction nodes to one of the output ports or connecting two neighboring junction nodes, wherein the anodes of the bypass diodes are directly or indirectly connected to same one of the output ports, and cathodes of the bypass diodes are directly or indirectly connected to another one of the output ports.