Patent ID: 8829717
Filing Date: 2014-09-09
Classification: H02J,Y02P,Y02T

Abstract:
1. A battery control device for a battery module including a plurality of battery cell groups connected in series each made up with a plurality of battery cells connected in series, comprising: a plurality of integrated circuits each of which is provided in correspondence to one of the plurality of battery cell groups, and executes control processing and monitor processing for each of the battery cells in the one of the battery cell groups; a first transmission path connecting the plurality of integrated circuits in series, through which a signal is transmitted among the integrated circuits; a second transmission path through which a signal output from a higher-order control circuit that controls the plurality of integrated circuits, is transmitted via a first insulating circuit to a highest-order integrated circuit among the plurality of integrated circuits connected in series; and a third transmission path through which a signal sent from a lowest-order integrated circuit among the plurality of integrated circuits connected in series to the higher-order control circuit, is transmitted via a second insulating circuit, wherein each integrated circuit among the plurality of integrated circuits comprises: a constant voltage circuit that lowers a total voltage of a battery cell group corresponding to the integrated circuit to an integrated circuit internal voltage; a signal generation circuit that, when a first startup signal is inputted through the second transmission path and via the first insulating circuit from the higher-order control circuit, generates, a second startup signal assuming a wave height value different from a wave height value of the first startup signal and outputs the second startup signal to the first transmission path, and that, when the second startup signal is inputted through the first transmission path from a higher-order integrated circuit, outputs the second startup signal to the first transmission path or the third transmission path; and a first startup circuit that includes a first comparator which compares a first decision-making threshold value corresponding to the first startup signal with the inputted first startup signal or the inputted second startup signal and changes an output thereof according to a result of comparison, and a first trigger circuit that outputs a first trigger signal based on a change of the output of the first comparator; a second startup circuit that includes a second comparator which compares a second decision-making threshold value corresponding to the second startup signal with the inputted first startup signal or the inputted second startup signal and changes an output thereof according to a result of comparison, and a second trigger circuit that outputs a second trigger signal based on a change of the output of the second comparator; and an OR circuit that outputs a signal to start up, the constant voltage circuit when at least one of the first trigger signal and the second trigger signal is outputted.