Patent ID: 8084997
Filing Date: 2011-12-27
Classification: G01R

Abstract:
1. A voltage sensor module monitoring a voltage of each of a plurality of battery cells, comprising: a first terminal and a second terminal each to receive a voltage applied between both ends of the plurality of battery cells; a third terminal and a fourth terminal each to receive a voltage applied between both ends of a battery cell to be monitored which is included in the plurality of battery cells; a plurality of reference voltage generation circuits, each of the plurality of reference voltage generation circuits corresponding to one of the plurality of battery cells and generating a reference voltage for monitoring the battery cell; a first reference voltage generation circuit, from among the plurality of reference voltage generation circuits, connected to each of the first terminal and the second terminal and to generate a first reference voltage based on the voltage applied between the both ends of the plurality of battery cells; and a first comparator circuit to compare a first regulated voltage generated based on a voltage applied between the third terminal and the fourth terminal, with the first reference voltage; a fifth terminal and a sixth terminal each receiving a voltage applied between both ends of another battery cell to be monitored which is included in the plurality of battery cells; a second reference voltage generation circuit connected to each of a seventh terminal and an eighth terminal and generating a second reference voltage based on the voltage applied between the both ends of the plurality of battery cells; and a second comparator circuit comparing a second regulated voltage generated based on a voltage applied between the fifth terminal and the sixth terminal, with the second reference voltage, wherein all reference voltages generated by the plurality of reference voltage generation circuits for monitoring the plurality of battery cells are generated based on a voltage applied between both ends of at least two battery cells included in the plurality of cells, the all reference voltages including the first and second reference voltages.