Electrically isolated heat dissipating junction box
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.
1. A system comprising:
at least one photovoltaic panel;
a circuit board for electrical power conversion; and
a junction box comprising
a wall common to and physically separating a first chamber and a second chamber,
the wall comprising a first electrical connection therein,
wherein the first chamber comprises:
a heat sink attached therein; and
a recess configured to receive the circuit board onto the heat sink, wherein
the heat sink is adapted to dissipate heat generated by the circuit board;
wherein the second chamber comprises an electrical connector providing a second electrical connection to the at least one photovoltaic panel, and
wherein the first electrical connection is configured to electrically connect the circuit board and the second electrical connection in the second chamber.
2. The system of claim 1 , wherein the junction box further comprises a bus bar sealed therein.
3. The system of claim 2 , wherein the bus bar provides electrical connectivity between the circuit board and the electrical connector.
4. The system of claim 1 , wherein the wall of the junction box comprises a double wall adapted to allow for mutual separation of the first chamber to the second chamber.
5. The system of claim 1 , wherein the wall of the junction box comprises a double wall adapted to allow for re-attachment of the first chamber to the second chamber.
6. The system of claim 1 , wherein replacing the first chamber of the junction box does not require disconnecting the second chamber of the junction box from the at least one photovoltaic panel.
7. The system of claim 1 , wherein the first chamber of the junction box is hermetically sealed against an ingress of water or humidity.
8. The system of claim 7 , wherein a bus bar is sealed in the wall of the junction box so as to preserve a level of hermeticity of the first chamber.
9. The system of claim 1 , wherein the heat sink includes a dovetail structure adapted to prevent mutual separation of the heat sink from the junction box.
10. The system of claim 1 , wherein the first chamber of the junction box is covered by a first lid.
11. The system of claim 10 , wherein the second chamber of the junction box is covered by a second lid.
12. The system of claim 11 , wherein the second chamber of the junction box is accessible by opening the second lid.
13. The system of claim 11 , wherein the first lid and the second lid are on opposite sides of the junction box.