Battery coupling device e.g. for uninterrupted current supply

摘要

The invention relates to a device for coupling a battery (2) to a mains-supplied intermediate voltage circuit of a converter. According to the invention, this device has two capacitors (CE, CA), two rectifier bridge branches (18, 20) which are connected electrically in parallel to a capacitor (CE, CA), a choke (L) which interconnects the center terminals (30, 32) of the two rectifier bridge branches (18, 20), a power semiconductor switch (V5) which allows the positive terminals (28, 26) of the two rectifier bridge branches to be interconnected, and an electronic control system (6) with downstream driver stages (8), which generates control signals (S1,...,S5) from the actual values (UBat, UZK, IL, IBat), a mains failure signal (UNAF) and a choke current reference value (I*L). This provides a battery coupling device in which the battery (2) is not continuously a.c.-loaded and it is possible to take care of the battery to extend its useful life.