Patent ID: 7641506

Claim:
A connection device for a heavy-duty plug-type connection, with a first connector and a second connector, which each have a contact-making element in order to produce an electrical connection in the connected state of the connectors; the connectors bearing against one another at a connection region in the connected state; at least one of the connectors comprising a coolant line with one or more access points for the supply and discharge, respectively, of a coolant; the coolant line being provided at the contact-making element in order to dissipate heat from a contact point between the contact-making elements; wherein all of the access points of the coolant line are arranged outside the connection region, and wherein the first connector comprises a housing with a contact-making element accommodated therein, a section of the coolant line being formed between the housing and the contact-making element, the housing having a passage for accommodating the contact-making element of the second connector, the passage being formed in such a way that it is closed in the connected state by means of the contact-making element of the second connector so as to prevent the emergence of the coolant, and a closure element being provided in order to close the passage in the non-connected state so as to prevent the emergence of the coolant.