Cold plate for power electronic systems
An energy management unit (EMU) is disclosed. The EMU includes a cold plate sandwiched between a first printed circuit board (PCB) and a second PCB, the cold plate including one or more magnetics. The cold plate cools both the first PCB and the second PCB.
1 . An energy management unit (EMU) comprising:
a cold plate sandwiched between a first printed circuit board (PCB) and a second PCB, the cold plate comprising one or more magnetics;
wherein the cold plate is configured to cool both the first PCB and the second PCB;
wherein the cold plate comprises multiple layers including: a top outer layer and a bottom outer layer;
wherein the cold plate further comprises a first sealing gasket inside of the top outer layer and a second sealing gasket inside of the bottom outer layer;
wherein the first sealing gasket is configured to seal around a top side of the one or more magnetic pockets and allow coolant to flow over a top of the one or more magnetics; and
wherein the second sealing gasket is configured to seal around one or more magnetic leads while allowing coolant to flow over the magnetics, around the one or more magnetic leads.
2 . The EMU of claim 1 , wherein the first PCB comprises a DC-DC PCB and the second PCB comprises an on board charger (OBC) PCB.
3 . The EMU of claim 1 , wherein the cold plate comprises one or more magnetic pockets configured to hold the one or more magnetics.
4 . The EMU of claim 1 , wherein the first sealing gasket comprises an O-ring gasket.
5 . The EMU of claim 1 , wherein the second sealing gasket comprises a gasket plate having asymmetrical sealing surfaces on both sides.
6 . The EMU of claim 1 , wherein the second sealing gasket is configured to allow coolant to flow over the one or more magnetics and directly underneath a bottom of field effect transistors (FETs) packaged on an outside of the bottom outer layer.
7 . The EMU of claim 1 , wherein the second sealing gasket is configured to route coolant into and out of the bottom outer layer as the coolant passes through the cold plate.
8 . The EMU of claim 1 , further comprising a magnetics interface of the cold plate, the magnetics interface comprising:
a threaded interface comprising both an electrical connection between the one or more magnetics and the first PCB and a mechanical connection securing the first PCB to the cold plate.
9 . The EMU of claim 8 , further comprising an end cap on top of the one or more magnetics.
10 . The EMU of claim 8 , wherein the threaded interface comprises a compatible material interface with the first PCB.
11 . The EMU of claim 10 , wherein the compatible material interface comprises a combination of electroless nickel immersion gold (ENIG), copper, gold, or nickel.
12 . A cooling apparatus comprising:
one or more magnetic pockets configured to hold one or more magnetics;
a top outer layer and a bottom outer layer, both comprising end lid-manifolds of which power silicon devices are mounted to;
a first sealing gasket inside of the top outer layer, the first sealing gasket configured to seal around a top side of the one or more magnetic pockets and allow coolant to flow over a top of the one or more magnetics; and
a second sealing gasket inside of the bottom outer layer, the second sealing gasket is configured to seal around one or more magnetic leads while allowing coolant to flow over the magnetics, around the one or more magnetic leads.
13 . The cooling apparatus of claim 12 further comprising a magnetics interface comprising:
a threaded interface comprising both an electrical connection between the one or more magnetics and the first PCB and a mechanical connection securing the first PCB to the cold plate.