A connection module for an electrical energy storage device of a motor vehicle includes a first connection element and a second connection element for connecting to the electrical energy storage device and to a traction network. The connection module includes busbars which connect the first connection element and the second connection element to one another. The connection module further includes a primary current measurement element and a secondary current measurement element, wherein the secondary current measurement element operates contactlessly. A power supply system for a motor vehicle is also provided.