Method for determining a power level of a battery and circuit therefor

摘要

A remaining battery power calculation circuit includes: a detection unit configured to detect an output voltage of a battery; a data storage unit configured to store data in an associated manner with each of a plurality of current values for charge or discharge of the battery, the data indicating a relationship between the output voltage and a ratio of remaining power of the battery to a capacity of the battery in a case where the battery is charged or discharged with each of the plurality of current values; and a first calculation unit configured to calculate a charging/discharging current of the battery based on the data and the output voltage.

主权项

1. A battery power determination circuit, comprising:
a central processing unit having an input, an output, a first input/output, and a second input/output; a selector circuit having a plurality of inputs and an output, a first input of the selector circuit coupled to the output of the central processing unit; an interface circuit having an input, a plurality of outputs, and an input/output, the input/output of the interface circuit coupled to the first input/output of the central processing unit; an analog-to-digital converter having an input and an output, the input of the analog-to-digital converter coupled to the output of the selector circuit; and a first storage element having an input/output coupled the second input/output of the central processing unit.