Patent ID: 6614233
Filing Date: 2003-09-02
Classification: B60L,G01R,H02J,Y02T

Abstract:
A battery pack abnormality detection apparatus that detects an abnormality occurring in a battery pack achieved by connecting in a series of plurality of modules each constituted of a plurality of cells, comprising:a plurality of cell controllers connected in series to individually control the modules; and a battery controller that controls the plurality of cell controllers and detects a cell abnormality, wherein: a cell controller at an uppermost stage among the plurality of cell controllers detects individual states of depletion of the plurality of cells in the corresponding module and outputs the state of depletion of the cell at the most advanced state of depletion among the detected states of depletion to the cell controller at the next stage; a plurality of cell controllers connected at subsequent stages succeeding the cell controller at the uppermost stage each detect individual states of depletion of the plurality of cells in the corresponding module, compare the state of depletion of the cell at the most advanced state of depletion among the detected states of depletion with the state of depletion input from the cell controller at the preceding stage and output the state of depletion in a more advanced state to the cell controller at the next stage; and the battery controller detects a cell abnormality based upon the state of depletion in the most advanced state input from the cell controller at a lowermost stage.