Patent ID: 8072725

Claim:
A connection unit for connecting first and second power storage devices to a vehicle load, provided separately from a connection unit for connecting a main power storage device to said vehicle load, said first and second power storage devices differing from said main power storage device, comprising: a first relay connected between a first electrode of said first power storage device and a first power feed line towards said vehicle load, a second relay connected between a second electrode of said first power storage device having a polarity different from the polarity of said first electrode and a second power feed line towards said vehicle load, a third relay and a current limiting resistor connected in series between said second electrode of said first power storage device and said second power feed line, a fourth relay connected between an electrode of said second power storage device having a polarity identical to the polarity of said first electrode and said first power feed line towards said vehicle load, and a conductor line connecting an electrode of said second power storage device having a polarity identical to the polarity of said second electrode to said second electrode.