Patent ID: 6824918
Filing Date: 2004-11-30
Classification: H01M,Y02E

Abstract:
A battery pack, comprising:a first through nth secondary batteries, where n is an integer of at least 2, being sequentially stacked from the pack output terminals; and (n+2)th and (n+1)th secondary batteries being disposed from the positions of pack output terminals in a row in a direction perpendicular to a direction in which said first through nth secondary batteries are arranged, first polarity terminals of said (n+2)th and (n+1)th secondary batteries being connected to each other, and a pack output terminal having a second polarity opposite to the first polarity and the second polarity terminals of said nth, the (n+1)th, and the (n+2)th secondary batteries being connected in common by a conductive body, said conductive body comprising: a first conductive body connecting the second polarity terminals of said (n+2)th and (n+1)th secondary batteries to each other; and a second conductive body connecting to the pack output terminals including the second polarity at a first branch point of said first conductive body, and said first branch point of said first conductive body being set to minimize a difference between resistance values of current paths of the (n+2)th and (n+1)th secondary batteries between the pack output terminals including the first and second polarities.