High-current plug-in connector, patch cable and plug-in connector system for a rechargeable battery pack

A high-current plug-in connector (′), comprising a plug-in connector housing () and a socket contact (′) which is arranged therein and has a plug-in region (′) with a contact hole (′), wherein the high-current plug-in connector () has a coding for identifying its maximum current-carrying capacity, wherein the socket contact () has, at the contact hole (), one or more grooves (), each with a contact spring () arranged therein or at least engaging therein, wherein the number of contact springs () determines the current-carrying capacity of the high-current plug-in connector (), and the coding is formed by the depth of the contact hole ().