VEHICLE BATTERY CHARGING SYSTEM FOR CHARGING A HIGH-VOLTAGE BATTERY AND LOW-VOLTAGE BATTERY OF A VEHICLE

摘要

PURPOSE: A vehicle battery charging system reduces manufacturing costs and makes products light caused by the reduction in the number of components by integrating a charger and a low-voltage DC-DC converter into one device.;CONSTITUTION: A first full-bridge circuit (30) converts DC power inputted from the outside into AC power and outputs the AC power. A transformer (40) is connected to an external configuration through a primary side input terminal (42), a secondary side first output terminal (44), and a secondary side second output terminal (46). A second full-bridge circuit (50) operates in two selection modes by a control signal transmitted from a control unit (80). An output circuit (70) rectifies power inputted from the secondary side second output terminal and supplies the power to a low-voltage battery. The control unit independently controls the charging operation of a high-voltage battery and the low-voltage battery.;COPYRIGHT KIPO 2013;[Reference numerals] (10) Rectifying circuit unit; (20) Power factor improvement circuit unit; (60) Filter circuit unit; (72) Rectifying circuit; (74) Filter circuit; (76) Power conversion circuit; (80) Control unit; (82) First operation mode; (84) Second operation mode; (86) Third operation mode; (B1) High-voltage battery; (B2) Low-voltage battery