Patent ID: 7911179

Claim:
A charging/discharging apparatus comprising: a group of conductors for connecting one line each respectively to both ends of a group of battery blocks connected in series forming a battery pack and a connection point between battery blocks; a group of discharging circuits mutually connected in series via first switches and connected in parallel to said battery blocks via said conductors and second switches, and each disposed at every battery block for discharging said battery block; a group of charging circuits mutually connected in series via third switches and connected in parallel to said discharging circuits via said conductors and connected in parallel to said battery blocks via said conductors and said second switches, and each disposed at every battery block for charging said battery block; and a charging/discharging control unit for allowing at least one discharging circuit selected from said group of discharging circuits with control of turning on at least one of said first switches, or at least one charging circuit selected from said group of charging circuits with control of turning on at least one of said third switches, to perform discharging or charging with control of turning on said second switch connected to said selected discharging circuit or said selected charging circuit.