Patent ID: 6762588
Filing Date: 2004-07-13
Classification: B60L,G01R,H01M,H02J,Y02E,Y02T

Abstract:
A battery apparatus, comprising:plural battery modules connected in series each having plural battery cells connected in series; plural low order control devices which are provided in correspondence with the plural battery modules, respectively, each of the plural low order control devices controlling the plural battery cells corresponding to one of the plural battery modules, the plural low order control devices including a low order control device at a highest potential among the plural low order control devices, a low order device at a lowest potential among the plural low order control devices, and at least one low order device at a potential between the highest potential and the lowest potential among the plural low order control devices; a high order control device which controls the plural low order control devices; isolating units which connect an input terminal of the low order control device at a highest potential among the plural low order control devices to the high order control device, and an output terminal of the low order control device at a lowest potential among the plural low order control devices to the high order control device; and interruption elements each of which is disposed between the output terminal of a corresponding one of the plural low order control devices and the battery cell in a corresponding one of the plural battery modules on a low potential side and blocks discharge current of the battery cells in the corresponding battery module, wherein terminals related to input and output of a signal are connected in an electrically non-isolated state among the plural low order control devices, the terminals related to input and output of a signal for the at least one low order device at a potential between the highest potential and the lowest potential among the plural low order control devices being connected only to others of the plural low order control devices.