Method for protecting charging cable, and charging device

摘要

A driving battery of a vehicle that can be electrically driven is charged by determining a resistance value that corresponds to the size of the electrical resistance between two contacts of the charging cable, where the size of the electrical resistance specifies the current-carrying capacity of the charging cable. As a function of the determined resistance value, one of a plurality of line protection devices which are disposed on the charging device is switched into the charge current path.

主权项

1. A method for protecting a charging cable for a charging device for charging a traction battery of an electrically drivable vehicle, comprising:
receiving, at an interface of the charging device, a physical connection to a charging cable, the charging cable comprising a set of contacts including at least: at least one current transmission contact configured to communicate a charging current from the charging device, a pilot contact configured to communicate information between the charging device and the vehicle, and a pair of additional contacts connected to each other within the charging cable by a conductive path having an electrical resistance; wherein the physical connection of the charging cable to the charging device establishes a connection of a resistance measuring device of the charging device and the pair of additional contacts of the charging cable; in response to the physical connection of the charging cable to the charging cable, the resistance measuring device of the charging device determining a resistance value corresponding to a magnitude of the defined electrical resistance between the pair of additional contacts of the charging cable, the magnitude of the electrical resistance indicating current-carrying capacity of the charging cable; and the resistance measuring device of the charging device generating and communicating, to a switching device of the charging device, a signal based on the resistance value determined; and in response to receiving the signal from the resistance measuring device, the switching device of the charging device switching one of a plurality of line protection devices arranged in the charging device into the charging current path depending on the resistance value determined.