US 8,711,534 B2Granted

Battery power management system and method

AssigneeuPI Semiconductor Corp.

InventorsSei-Ching Yang, Yu-Te Chou

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Abstract

A battery power management system including a protection switch, a battery set, a high-voltage protection chip, a plurality of voltage-dividing units and a low-voltage measurement chip is provided. The protection switch and the battery set are connected in series between a first power terminal and a second power terminal of the battery power management system. The battery set includes a plurality of battery cells and has a plurality of sensing nodes. The high-voltage protection chip controls the protection switch according to a plurality of first sensing voltages from the sensing nodes. The voltage-dividing units are connected to a part of the sensing nodes and divide a part of the first sensing voltages to generate a plurality of second sensing voltages. The low-voltage measurement chip is connected to the voltage-dividing units and measures electric quantities of the battery cells according to the second sensing voltages.

Claims8

Dependent claims

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 pre-charge switch, connected in parallel to the protection switch, and the high-voltage protection chip controls the pre-charge switch according to a pre-charge signal;
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.

4 more elements

A battery power management method, adapted to a battery set, wherein the battery set comprises a plurality of battery cells and has a plurality of sensing nodes, and a part of the sensing nodes are respectively located between the battery cells, the battery power management method comprising:

providing a plurality of first sensing voltages through the sensing nodes;
connecting a protection switch between a first power terminal and the battery set;
controlling the protection switch according to the first sensing voltages;
dividing the first sensing voltages to provide a plurality of second sensing voltages;
measuring an electric quantity of the battery set according to the second sensing voltages;
connecting a pre-charge switch and the protection switch in parallel;
and
controlling the pre-charge switch according to a pre-charge signal.

5 more elements

Dependencies are inferred from the claim text.