Power electronics system with a switching device and a liquid cooling device

A power electronics system, having a switching device and a liquid cooling device, wherein:

• the switching device, further comprises:
• a plate element on the side of which, facing away from the liquid cooling device, a plurality of power semiconductor devices are arranged on electrically insulated conductor tracks and are connected in a circuit-compatible manner by means of a connecting device;
• and
• the liquid cooling device, further comprises:
• a first partial body having an inlet volume region and an outlet volume region and a second partial body, wherein a cooling volume region is formed between the two partial bodies, wherein a plurality of heat transfer bodies protrudes into the cooling volume region from the second partial body;
• the second partial body is arranged in a recess of the first partial body and the two partial bodies are connected to each other in a materially-bonded and fluid pressure-tight manner and have a common planar first surface that forms a first main surface;
• the liquid cooling device is designed and provided such that a coolant liquid flows through the liquid cooling device from the inlet volume region via the cooling volume region to the outlet volume region;
• and
• wherein the plate element of the switching device is arranged in a force-fitting manner on the common planar first surface.