Patent ID: 8711534
Filing Date: 2014-04-29
Classification: H02J

Abstract:
1. A battery power management system, having a first power terminal and the battery power management system comprising: a battery set, comprising a plurality of battery cells and having a plurality of sensing nodes, wherein a part of the sensing nodes are respectively located between the battery cells, and the sensing nodes provide a plurality of first sensing voltages; a protection switch, connected between the first power terminal and the battery set; a high-voltage protection chip, connected to the sensing nodes and the protection switch, and controlling the protection switch according to the first sensing voltages, wherein the high-voltage protection chip comprises: a plurality of voltage-dividing units, respectively connected to the sensing nodes, and dividing the first sensing voltages to generate a plurality of second sensing voltages; and a low-voltage measurement chip, connected to the voltage-dividing units, and measuring an electric quantity of the battery set according to the second sensing voltages, wherein the low-voltage measurement chip is connected to the high-voltage protection chip, and the low-voltage measurement chip provides the pre-charge signal to the high-voltage protection chip.