To provide a secondary battery pack which can adjust balance between secondary batteries in each block, and also can adjust the balance of a voltage between each block, in the secondary battery pack to which a plurality of the secondary batteries are connected in series.
The secondary battery pack comprises: a battery adjusting part 23 having a function for monitoring voltages of the secondary batteries 11 in the unit blocks 12, and a function for adjusting the balance of a voltage between the secondary batteries 11; a unit block balance part 24 having a function for adjusting the balance of the voltage between the unit blocks 12; a slave control part 25 for controlling the battery adjusting part and the unit block balance part; a master control part 27 for controlling the slave control part 25; and a composite block balance part 26 arranged at each composite block 13, and having a function for adjusting the balance of a voltage between the composite blocks 13 by the control of the master control part 27.
COPYRIGHT: (C)2009,JPO&INPIT
Kazuhisa Nagase
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Ishibashi Masayuki
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