Patent ID: 8030893
Filing Date: 2011-10-04
Classification: H01M,H02J,Y02E

Abstract:
1. A battery pack, comprising: an assembled battery including a plurality of secondary battery cells connected at least in series; a voltage detector which detects a terminal voltage of each of said plurality of secondary battery cells; a charge/discharge controller which controls charge/discharge of the assembled battery based on the terminal voltage of each cell detected by the voltage detector; a short-circuiting section which short-circuits a node between cells to the high voltage side or the low voltage side of a power line, or which short-circuits nodes between the cells to each other; and a disconnection detector which controls conduction/non-conduction of said short-circuiting section and which detects a disconnection of the connection line from the voltage detector to the node between the cells, based on a state of controlling the conduction/non-conduction, and at least one of a voltage at the node between the cells detected by said voltage detector, a voltage of the high voltage side or the low voltage side of the power line, and a terminal voltage of each cell, wherein: the short-circuiting section includes a series circuit made up of a resistor and a switch, and said series circuit short-circuits the high voltage side of the power line and the node between the cells respectively to the low voltage side of the power line.