Electrically isolated heat dissipating junction box

Patent metadata

Field	Value
Publication number	US-10411644-B2
Application number	US-201715651134-A
Country	US
Kind code	B2
Filing date	Jul 17, 2017
Priority date	May 22, 2009
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A junction box used for making electrical connections to a photovoltaic panel. The junction box has two chambers including a first chamber and a second chamber and a wall common to and separating both chambers. The wall may be adapted to have an electrical connection therethrough. The two lids are adapted to seal respectively the two chambers. The two lids are on opposite sides of the junction box relative to the photovoltaic panel. The two lids may be attachable using different sealing processes to a different level of hermeticity. The first chamber may be adapted to receive a circuit board for electrical power conversion. The junction box may include supports for mounting a printed circuit board in the first chamber. The second chamber is configured for electrical connection to the photovoltaic panel. A metal heat sink may be bonded inside the first chamber.

First claim

The invention claimed is:

1. A junction box comprising:
a first chamber sealed against a first level of water ingress by a first lid;
a second chamber sealed against a second level of water ingress by a second lid, the first level of water ingress being different than the second level of water ingress;
a circuit board within the first chamber and designed to convert electrical power received from a photovoltaic panel; and
an electrical connection within the second chamber and designed to receive the electrical power from the photovoltaic panel.

2. The junction box of claim 1 , wherein the first lid and the second lid are configured to be on opposite sides of the junction box relative to the photovoltaic panel.

3. The junction box of claim 1 , further comprising a metal heat sink bonded inside the first chamber, the metal heat sink configured to dissipate heat generated by the circuit board.

4. The junction box of claim 3 , wherein the metal heat sink comprises a structure adapted to prevent mutual separation of the metal heat sink from the junction box.

5. The junction box of claim 1 , further comprising a wall to separate the first chamber and the second chamber, wherein the wall allows for mutual separation and reattachment of the first chamber and second chamber.

6. The junction box of claim 1 , wherein a side of the second chamber is configured to attach to the photovoltaic panel, and wherein the first chamber is configured to disconnect from the photovoltaic panel without disconnecting the second chamber from the photovoltaic panel.

7. The junction box of claim 1 , further comprising a re-connectable second electrical connection that connects the circuit board in the first chamber to the electrical connection in the second chamber.

8. The junction box of claim 1 , further comprising a gasket configured to seal an open end of the second chamber.

9. A junction box comprising:
a first chamber comprising a circuit board designed to convert electrical power received from a photovoltaic panel;
a second chamber designed to receive the electrical power from the photovoltaic panel,
wherein the first chamber is sealed against a first level of water ingress by a first lid separately from the second chamber,
wherein the second chamber is sealed against a second level of water ingress by a second lid, and
wherein the first level of water ingress is different that the second level of water ingress.

10. The junction box of claim 9 , wherein the first lid and the second lid are configured to be on opposite sides of the junction box relative to the photovoltaic panel.

11. The junction box of claim 9 , further comprising a metal heat sink bonded inside the first chamber, the metal heat sink configured to dissipate heat generated by the circuit board.

12. The junction box of claim 11 , wherein the metal heat sink comprises a structure adapted to prevent mutual separation of the metal heat sink from the junction box.

13. The junction box of claim 9 , further comprising:
a wall to separate the first chamber and the second chamber, wherein the wall allows for mutual separation and reattachment of the first chamber and second chamber.

14. The junction box of claim 9 , wherein the first chamber is configured to disconnect from the photovoltaic panel without disconnecting the second chamber from the photovoltaic panel.

15. A method comprising:
sealing, in a junction box, a first chamber against a first level of water ingress by a first lid;
sealing, in the junction box, a second chamber against a second level of water ingress by a second lid, wherein the first level of water ingress is different than the second level of water ingress;
configuring an electrical connection within the second chamber to receive electrical power from a photovoltaic panel; and
configuring a circuit board within the first chamber to receive power from the photovoltaic panel via the electrical connection of the second chamber.

16. The method of claim 15 , further comprising
configuring a wall to separate the first chamber and the second chamber, wherein the wall allows for mutual separation and reattachment of the first chamber and second; and
configuring the first chamber to disconnect from the second chamber and the photovoltaic panel without disconnecting the second chamber from the photovoltaic panel.

17. The method of claim 15 , further comprising;
configuring the first lid and the second lid to be on opposite sides of the junction box relative to the photovoltaic panel.

18. The method of claim 15 , further comprising;
bonding a metal sink inside the first chamber, the metal sink comprising a structure adapted to prevent mutual separation of the metal heat sink from the junction box; and
configuring the metal sink to dissipate heat generated by the circuit board.

Assignees

• Solaredge Technologies Ltd

Inventors

• Sella Guy
• Handelsman Lior
• Shmukler Vadim
• Adest Meir
• Gazit Meir
• Galin Yoav

Classifications

• H05K5/062

  sealed by a material injected between a non-removable cover and a body, e.g. hardening in situ · CPC title

• Y10T29/49117

  Conductor or circuit manufacturing · CPC title

• H05K5/02

  Details · CPC title

• H02S40/345

  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

• Y10S248/906

  Electrical outlet box support · CPC title