Pre-charging circuit and method of non-isolated bidirectional DC-DC converter

• Main Authors: LIU BO, GUO YUANZHEN
• Format: Patent
• Language: Chinese; English
• Published: 26.01.2018
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention relates to a pre-charging circuit and method of a non-isolated bidirectional DC-DC converter. The circuit comprises a first capacitor, a second capacitor, a controller, a first power amplification tube, a current limiting resistor and a second power amplification tube, wherein the first capacitor is connected with a first battery via an inductor and is connected with a secondary battery and the controller, a total switch is arranged between the first capacitor and the second capacitor, the second capacitor is connected in parallel between the inductor and the first battery, a control pin of the first power amplification tube is connected with the controller, an output pin of the first power amplification tube is connected with a control pin of the second power amplification tube, an input pin of the first power amplification tube is connected with ground, an input pin of the second power amplification tube is connected with the first battery, and an output pin of the second power amplification t