Thermal management system including an overmolded layer and a conductive layer over a circuit board
A system is including: an overmolded layer that is placed above a top surface and below a bottom surface of a circuit board, wherein the overmolded layer exposes at least communication interfaces on the circuit board and surrounds a heat generating component on the circuit board; a conductive layer that is placed over the overmolded layer on the top surface of the circuit board, wherein the conductive layer exposes the communication interfaces of the circuit board and covers the heat generating component on the circuit board; and wherein heat from the heat generating component is transferred into the conductive layer.
1 . A system, comprising:
an overmolded layer that is placed above a top surface and below a bottom surface of a circuit board, wherein the overmolded layer exposes at least communication interfaces on the circuit board and surrounds a heat generating component on the circuit board, wherein the overmolded layer exposes a surface of the heat generating component; and
a conductive layer that is placed over the overmolded layer on the top surface of the circuit board, wherein the conductive layer exposes the communication interfaces of the circuit board, wherein the conductive layer comprises a recessed area over the surface of the heat generating component on the circuit board, and wherein heat from the heat generating component is transferred into the conductive layer.
2 . The system of claim 1 , wherein the overmolded layer surrounds a perimeter of the heat generating component on the circuit board.
3 . The system of claim 1 , wherein the conductive layer comprises a metallic sheet.
4 . The system of claim 1 , wherein a thermal interface pad is attached on the surface of the heat generating component, and wherein the thermal interface pad is substantially flush against a bottom surface of the recessed area of the conductive layer.
5 . The system of claim 4 , wherein the thermal interface pad is compressible.
6 . The system of claim 4 , wherein the conductive layer provides an air gap over a top surface of the overmolded layer other than the recessed area.
7 . The system of claim 1 , wherein the heat generating component is a central processing unit.
8 . The system of claim 1 , wherein the overmolded layer further exposes a first set of mounting points on the circuit board, and wherein the system is operable to be mounted to an interior of an inverter device via the first set of mounting points.
9 . The system of claim 8 , wherein the first set of mounting points is fastened to a conductive liner along a side of an insulating enclosure of the inverter device.
10 . The system of claim 9 , wherein the conductive liner provides grounding.
11 . The system of claim 8 , wherein the first set of mounting points comprises through-holes through the circuit board, and wherein the through-holes through the circuit board are plated with protective coating.
12 . The system of claim 8 , wherein the conductive layer comprises through-holes corresponding to the first set of mounting points on the circuit board, wherein the conductive layer is operable to be fastened to the circuit board via the first set of mounting points.
13 . The system of claim 8 , wherein the conductive layer further includes a second set of mounting points, and wherein the system is operable to be mounted to the interior of the inverter device via the first set of mounting points and the second set of mounting points.
14 . The system of claim 1 , wherein the conductive layer exposes the communication interfaces of the circuit board via a single cutout region.
15 . The system of claim 14 , wherein the conductive layer exposes the communication interfaces of the circuit board via a plurality of cutout regions.
16 . The system of claim 1 , wherein the overmolded layer comprises a protruding feature that is exposed through a cutout region of the conductive layer.
17 . The system of claim 1 , wherein the overmolded layer is added to the circuit board via low pressure injection molding.