POWER SUPPLY SYSTEM AND ELECTRIC VEHICLE EQUIPPED WITH THE SAME, AND METHOD FOR CONTROLLING POWER SUPPLY SYSTEM

摘要

Converters (8-1, 8-2) are configured to operate in a normal operation to convert the electric power that is input/output to/from secondary batteries (6-1, 6-2) bidirectionally to direct current voltage. In a predetermined mode allowing the secondary batteries (6-1,6-2) to be charged, at least one of the converters (8-1, 8-2) does not perform a switching operation and holds on an upper arm element (Q1B, Q2B) to avoid a switching loss in charging the secondary batteries (6-1,6-2). An electric power loss caused at the converters in charging the secondary batteries can be reduced, and charging efficiency can be enhanced.