EQUALIZING CHARGING CIRCUIT FOR SUPER-POWER BATTERY FOR LOCOMOTIVE, AND CONTROL AND MANAGEMENT METHOD

• Main Authors: LI, Ruhua, WANG, Pinghua, MENG, Yuanwen
• Format: Patent
• Language: Chinese; English; French
• Published: 15.04.2021
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

An equalizing charging circuit for a super-power battery for a locomotive, and a control and management method. According to the charging circuit, single batteries are first connected in parallel and then connected in series to form a battery pack, multiple battery packs are connected in series to form a power supply branch circuit, each branch circuit is connected in parallel to an intermediate direct current loop by means of an anti-parallel diode of an IGBT for supplying power to a load, and the multiple branch circuits share a pre-charging resistor to charge an intermediate direct current loop capacitor. The charging control and management method comprises: during charging, each branch circuit is controlled by an independent IGBT to separately control a charging current of each branch circuit, so that the battery states of charge (SOC) of the branch circuits are consistent and voltages thereof are equalized. The solution can avoid a circulating current between branch circuits, keep the SOC of the branch c