Power management scheme for separately and accurately measuring battery information of each of multiple batteries
AssigneeMediatek Inc.
InventorJui-Chi Wu
Life of this patent
Estimating the term…
Abstract
A power management apparatus used in a system comprising multiple batteries includes an ADC measurement circuit and a processing circuit. The ADC measurement circuit is configured for measuring or detecting a plurality of voltage levels for each of the multiple batteries. The processing circuit is configured for calculating a DC current for each of the batteries according to an internal resistance of each of the batteries and the detected voltage levels, and for estimating an internal voltage level for each of the batteries according to the calculated DC current.
Claims16
A power management apparatus used in a system comprising multiple batteries, comprising:
- an ADC measurement circuit, configured for measuring or detecting a plurality of external voltage levels at different timings for each of the multiple batteries, the plurality of external voltage levels being external battery voltages of each of the multiple batteries measured at the different timings;
- and
- a processing circuit, coupled to the ADC measurement circuit, configured for performing following operations for each of the batteries:
- calculating a DC current of each of the batteries according to the detected external voltage levels and an internal resistance of each of the batteries initially measured by a resistance measurement circuit, and for estimating an internal voltage level of each of the batteries according to the calculated DC current when the DC current has been calculated based on the internal resistance of each of the batteries and the detected external voltage levels.
A power management method used in a system comprising multiple batteries, comprising:
- providing and using a single ADC measurement circuit to measure or detect a plurality of external voltage levels at different timings for each of the multiple batteries, the plurality of external voltage levels being external battery voltages of each of the multiple batteries measured at the different timings;
- and
- for each of the batteries:
- calculating a DC current of each of the batteries according to the detected external voltage levels and an internal resistance of each of the batteries initially measured by a resistance measurement circuit;
- and
- estimating an internal voltage level of each of the batteries according to the calculated DC current when the DC current has been calculated based on the internal resistance of each of the batteries and the detected external voltage levels.
Dependencies are inferred from the claim text.