CHARGING DEVICE HAVING A SECONDARY POWER SUPPLY UNIT

摘要

The invention relates to a charging device, comprising an external AC voltage source (3) and a motor vehicle (1) with a high-voltage battery (2), the motor vehicle (1) comprising a low-voltage battery (4), an intermediate circuit capacitor (6) and a charge electronics unit (8) with a charge voltage input (9) and a supply voltage input (10), and the charging device being designed such that the motor vehicle (1) comprises a bidirectional secondary power supply unit (11) with two interfaces, the first interface (13) of the secondary power supply unit (11) being connected in parallel to the intermediate circuit capacitor (6) and in parallel to the charge voltage input (9) of the charge electronics unit (8), and the second interface (12) of the secondary power supply unit (11) and the low-voltage battery (4) being connected in parallel to the supply voltage input (10) of the charge electronics unit (8).