Heat dissipation for a photovoltaic junction box

Patent metadata

Field	Value
Publication number	US-10790780-B2
Application number	US-201815934002-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Mar 29, 2017
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

An apparatus of a junction box component housed in a junction box and designed to be coupled to a power generator. The junction box component may include one or more bypass mechanisms configured to bypass one or more substrings of the power generator in a case of malfunction or mismatch between the substring and the remainder of the power generators. The one or more bypass mechanisms may generate heat which may be transferred out of the junction box. The junction box component may be designed to conduct the heat towards the base of the junction box and/or the cover of the junction box. A heat dissipation mechanism may be mounted on the base and/or the cover. A bypass mechanism may bypass the entire power generator.

First claim

We claim:

1. A junction box comprising:
a cover,
a base comprising a first side and a second side, wherein the first side is configured to be mounted to a photovoltaic panel, the second side includes a plurality of connectors and circuitry, the plurality of connectors are adapted to electrically couple substrings of a photovoltaic generator to the circuitry, and the circuitry is configured to bypass a substring,
wherein the cover is configured to cover the second side of the base, and

wherein the circuitry includes:
a plurality of bus bars adapted to electrically couple each of the plurality of connectors to a separate bypass mechanism, wherein the plurality of bus bars are configured to function as multi-directional heat spreaders; and
a first output conductor and a second output conductor, each configured to output power harvested from the photovoltaic panel, wherein the first output conductor is coupled to a first bus bar and the second output conductor is coupled to a second bus bar; and
a bypass mechanism mounted on the cover and configured to electrically couple to the first bus bar and to the second bus bar of the base when the cover is placed over the base.

2. The junction box of claim 1 wherein, when the cover is placed over the base, the bypass mechanism mounted on the cover is coupled to the second bus bar with a conductive rod.

3. The junction box of claim 1 , further comprising an additional bus bar configured to electrically couple to the bypass mechanism mounted on the cover when the cover is placed over the base.

4. The junction box of claim 1 , wherein the bypass mechanism mounted on the cover is configured to connect the first bus bar and the second bus bar with a click mechanism.

5. The junction box of claim 1 , wherein the cover further comprises output connectors configured to connect to other junction boxes or power devices.

6. The junction box of claim 1 , wherein the cover further comprises a control unit and a power converter.

7. A method comprising:
mounting a junction box base on a photovoltaic generator;
electrically coupling outputs of substrings of the photovoltaic generator to connectors and circuitry mounted in the junction box base, wherein the circuitry comprises a plurality of bus bars and a plurality of bypass mechanisms;
electrically coupling a first output conductor to a first bus bar and a second output conductor to a second bus bar;
covering the junction box base with a junction box cover; and
electrically coupling a bypass mechanism mounted to the junction box cover with the first bus bar and the second bus bar of the circuitry mounted to the junction box base.

8. The method of claim 7 , further comprising thermally coupling the circuitry mounted in the junction box base to the junction box cover.

Assignees

• Solaredge Technologies Ltd

Inventors

• Pomerantz Adi Naor
• Ilani Dan
• Gazit Meir
• Sella Guy
• Galin Yoav

Classifications

• H10F77/63

  Arrangements for cooling directly associated or integrated with photovoltaic cells, e.g. heat sinks directly associated with the photovoltaic cells or integrated Peltier elements for active cooling · CPC title

• H02G3/16

  structurally associated with support for line-connecting terminals within the box · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• H02S40/345 Primary

  with cooling means associated with the electrical connection means, e.g. cooling means associated with or applied to the junction box (cooling means for PV cells H10F77/63, for PV modules H02S40/42) · CPC title

• H01L31/052

  Electricity · mapped topic