Power converter apparatus for vehicle

1 . A power converter apparatus for a vehicle, comprising:

a power module assembly including a power module, a first plurality of coolers disposed on one side of the power module to cover the one side of the power module and directly overlapping each other without any intervening elements, and a second plurality of coolers disposed on another side of the power module to cover the another side of the power module and directly overlapping each other without any intervening elements; and

a capacitor and a low voltage direct-current (DC)-DC converter (LDC) which are coupled in a state of pressing the power module assembly on both sides of the power module assembly,

wherein each of the first plurality of coolers and the second plurality of coolers is a liquid cold plate comprising a passage through which a refrigerant flows.

2 . The power converter apparatus of claim 1 , further comprising an LDC assembly plate, which is configured to block electromagnetic waves generated in the LDC and facilitate heat exchange between a heater of the LDC and either the first plurality of coolers or the second plurality of coolers of the power module assembly, interposed between the LDC and the power module assembly.

3 . The power converter apparatus of claim 1 , further comprising: an engagement element passing through the LDC, the power module assembly, and the capacitor to engage the LDC, the power module assembly, and the capacitor and to press the power module assembly by the LDC and the capacitor.

4 . The power converter apparatus of claim 1 , further comprising:

a gate board configured to drive the power module and disposed below the power module assembly and the capacitor; and

a control board configured to control the gate board and disposed below the LDC and the gate board.

5 . The power converter apparatus of claim 4 , further comprising: an engagement element mechanically coupled with the capacitor and the gate board,

wherein the power module of the power module assembly is coupled to the gate board to provide a mechanical connection and an electrical connection.

6 . The power converter apparatus of claim 4 , further comprising: a board-to-board connector connected between the LDC and the control board and between the gate board and the control board.

7 . The power converter apparatus of claim 4 , wherein the LDC is mechanically coupled to the control board and the gate board is mechanically coupled to the control board through engagement elements.

8 . The power converter apparatus of claim 4 , wherein:

the control board and the gate board are disposed in parallel and spaced apart from each other; and

the LDC and the power module are vertically disposed with respect to the control board and the gate board.