Circuit Arrangement for a Motor Vehicle, in Particular for a Hybrid or Electric Vehicle

A circuit arrangement (10) of a motor vehicle, comprising:

• a high-voltage battery (12) for storing electrical energy;
• an electric machine (14) for driving the motor vehicle;
• a converter (16) via which high-voltage direct current (DC) voltage provided by the high-voltage battery (12) is convertible into high-voltage alternating current (AC) voltage for operating the electric machine (14);
• and
• a charging connection (20) for providing electrical energy for charging the high-voltage battery (12), wherein the charging connection (20) has a first line (34) and a second line (36);
• wherein the high-voltage battery (12) has a first battery segment (28) and a second battery segment (30) which are interconnected via a center tap (32) of the high-voltage battery (12);
• wherein the converter (16) is a three-stage converter having:
• a first switch unit (46) which is assigned to a first phase (u) of the electric machine (14);
• a second switch unit (48) which is assigned to a second phase (v) of the electric machine (14);
• and
• a third switch unit (50) which is assigned to a third phase (w) of the electric machine (14);
• wherein the first switch unit (46) has two switch groups (52, 54) connected in series which each have two insulated-gate bipolar transistors (IGBTs) (T11, T12, T13, T14) connected in series, wherein a connection (64) is disposed between the IGBTs (T11, T12) of one of the two switch groups (52, 54), which connection (64) is electrically connected directly to the first line (34) of the charging connection (20);
• a first switching state in which at least the first battery segment (28) of the high-voltage battery (12) is connected to the charging connection (20) via the three-stage converter and at least the second battery segment (30) of the high-voltage battery (12) is decoupled from the charging connection (20) by the converter (16) such that the first battery segment (28) can be charged via the three-stage converter with electrical energy provided by the charging connection (20);
• a second switching state in which at least the second battery segment (30) of the high-voltage battery (12) is connected to the charging connection (20) via the three-stage converter and the first battery segment (28) of the high-voltage battery (12) is decoupled from the charging connection (20) by the converter (16) such that the second battery segment (30) can be charged via the three-stage converter with electrical energy provided by the charging connection (20);
• and
• a third switching state in which both the first battery segment (28) and the second battery segment (30) of the high-voltage battery (12) are connected to the charging connection (20) via the three-stage converter such that the first battery segment (28) and the second battery segment (30) can be charged via the three-stage converter with electrical energy provided by the charging connection (20).