CHARGING CIRCUIT AND SYSTEM FOR RECHARGEABLE BATTERY

摘要

A charging circuit and system for a rechargeable battery. The charging circuit comprises a bidirectional DC/DC conversion circuit constituted by a first IGBT (11), a first diode (D1), a second IGBT (12) and a second diode (D2); a first current sensor connected between a source electrode of the first IGBT and a positive electrode of a rechargeable battery; a second current sensor connected between the source electrode of the first IGBT and the positive electrode of the rechargeable battery; and a control circuit respectively connected to grid electrodes of the first and second IGBTs and the first and second current sensors. The circuit improves the reliability of a charging station system.