Battery management system for gauging with low power
AssigneeSemiconductor Components Industries, LLC
InventorHideo Kondo
Life of this patent
Estimating the term…
Abstract
Implementations of fuel gauges may include a voltage sensor coupled with a memory, a processor coupled with the memory, a mode control logic circuit coupled with the voltage sensor, and a sampling timer coupled with the voltage sensor. The memory may include a plurality of relative state of charge (RSOC) values of a battery. The plurality of RSOC values may be used to calculate a plurality of internal resistance values. The fuel gauge may be configured to either increase, decrease, or maintain a sampling frequency based upon a measured power being drawn by a load coupled to the battery.
Claims20
A fuel gauge comprising:
- a voltage sensor coupled with a memory;
- a processor coupled with the memory;
- a mode control logic circuit coupled with the processor and the voltage sensor;
- and
- a sampling timer coupled with the mode control logic circuit and the voltage sensor;
- wherein the memory comprises a plurality of relative state of charge (RSOC) values of a battery;
- wherein the plurality of RSOC values are used to calculate a plurality of internal resistance values;
- and
- wherein the fuel gauge is configured to one of increase, decrease, or maintain a sampling frequency based upon a measured power being drawn by a load coupled to the battery.
A fuel gauge comprising:
- a voltage sensor coupled with a memory;
- a processor coupled with the memory;
- a mode control logic circuit coupled with the processor and the voltage sensor;
- a temperature sensor coupled with the memory;
- and
- a sampling timer coupled with the mode control logic circuit and the voltage sensor;
- wherein the memory comprises a plurality of relative state of charge (RSOC) values and a plurality of temperature parameters;
- wherein the plurality of RSOC values and the plurality of temperature parameters are used to calculate a plurality of internal resistance values;
- and
- wherein the fuel gauge is configured to one of increase or decrease a sampling frequency based upon a measured power being drawn by a load from a battery.
A method of conserving power comprising:
- sampling at least two measured power values of a battery using a voltage sensor coupled with a sampling timer;
- determining a fluctuation between the at least two measured power values;
- comparing the fluctuation between the at least two measured power values to one or more threshold power measurements, wherein the one or more threshold power measurements are derived from a table of values corresponding with a plurality of relative state of charge (RSOC) values of the battery;
- and
- using the fluctuation between the at least two measured power values, sending a signal to a mode control logic circuit to one of increase, decrease, or maintain a sampling rate of a fuel gauge.
Dependencies are inferred from the claim text.