Patent ID: 6252376
Filing Date: 2001-06-26
Classification: B60L,G01R,H02J,Y02T

Abstract:
A battery-state monitoring system for a battery group comprising:a plurality of battery module monitoring units each comprising:battery-state detecting means for detecting at least one state of each of plural battery modules forming a battery group;a switching element which turns on when the state of said battery module, detected by said battery-state detecting means, is a predetermined state, and turns off when said state is a state different from said predetermined state; andcurrent detecting means connected in series or parallel to said switching element;two signal lines connecting said switching elements of said plurality of module monitoring units in series; anda management unit comprising first means for supplying pulse current to said two signal lines; and a second means for detecting as to whether the circuit including said two signal lines is opened or closed, said management unit judging the states of said plurality of battery modules by the result of the detecting operation by said second means.