Measuring an open circuit voltage of a battery
AssigneeQUALCOMM Incorporated
InventorsAndrew CROXALL, Richard NGUYEN
Life of this patent
Estimating the term…
Abstract
Techniques and apparatus for accurately measuring an open circuit voltage of a battery included in a battery-powered device are provided. One example apparatus generally includes a sample-and-hold circuit configured to sample a voltage of a battery before loading the battery and to hold the sampled voltage of the battery; an analog-to-digital converter (ADC) selectively coupled to an output of the sample-and-hold circuit and configured to digitize the held voltage of the battery; and a controller configured to enable the ADC for digitizing the held voltage of the battery after the sample-and-hold circuit samples the voltage of the battery.
Claims20
A method comprising:
- sampling a voltage of a battery before loading the battery;
- holding the sampled voltage of the battery;
- digitizing the held voltage of the battery with an analog-to-digital converter (ADC) after loading the battery;
- and
- taking one or more actions based on the digitized voltage of the battery.
An apparatus comprising:
- a sample-and-hold circuit configured to sample a voltage of a battery before loading the battery and to hold the sampled voltage of the battery;
- an analog-to-digital converter (ADC) selectively coupled to an output of the sample-and-hold circuit and configured to digitize the held voltage of the battery;
- and
- a controller configured to enable the ADC for digitizing the held voltage of the battery after the sample-and-hold circuit samples the voltage of the battery.
An apparatus comprising:
- means for sampling a voltage of a battery before loading the battery;
- means for holding the sampled voltage of the battery;
- means for digitizing the held voltage of the battery after loading the battery;
- and
- means for taking one or more actions based on the digitized voltage of the battery.
Dependencies are inferred from the claim text.