Patent ID: 9178366
Filing Date: 2015-11-03
Classification: B60L,G01R,H02J,Y02T

Abstract:
1. A battery monitor circuit comprising: a first monitoring unit configured to detect voltages of battery cells included in a first group; a second monitoring unit configured to detect voltages of battery cells included in a second group; and a current cancellation unit configured to cancel a differential current that is a difference between a first current flowing through the first monitoring unit and a second current flowing through the second monitoring unit, and wherein the battery cells included in the first group and the battery cells included in the second group form a series connection, wherein one terminal of the series connection and one power terminal of the first monitoring unit are connected, the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit are connected, and the other power terminal of the second monitoring unit and the other terminal of the series connection are connected, and wherein the current cancellation unit is disposed between a connection point between the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit and a middle connection point in the middle of the series connection.