System and method for estimating state of health of capacitive device
AssigneeThe Paper Battery Co.
InventorGene Lee ARMSTRONG, II
Life of this patent
Estimating the term…
Abstract
State of health processes and systems are provided for analyzing a capacitor, such as a supercapacitor. The process includes, for instance: determining a measured capacitance of a capacitor; estimating an effective series resistance (ESR) of the capacitor; determining, using the measured capacitance and the effective series resistance, a linearized capacitance parameter (CAP) for the capacitor; and signaling should the CAP drop below, or the ESR rise above, a respective specified threshold for the capacitor. Using the CAP and the effective series resistance, an amount of energy remaining in the capacitor may be determined, upon which to base one or more actions.
Claims20
A method comprising:
- providing an energy storage system comprising, in part, a capacitor and state of health logic for monitoring the capacitor, the state of health logic:
- determining a measured capacitance of the capacitor;
- estimating an effective series resistance (ESR) of the capacitor;
- determining, using the measured capacitance and the effective series resistance, a linearized capacitance parameter (CAP) for the capacitor;
- and
- signaling should the CAP drop below, or the ESR rise above, a respective specified threshold for the capacitor.
A system comprising:
- a capacitor;
- and
- state of health logic for monitoring the capacitor during use, the state of health logic:
- determining a measured capacitance of the capacitor;
- estimating an effective series resistance (ESR) of the capacitor;
- determining, using the measured capacitance and the effective series resistance, a linearized capacitance parameter (CAP) of the capacitor;
- and
- signaling should the CAP drop below, or the ESR rise above, a respective specified threshold for the capacitor.
A computer program product for monitoring a capacitor, the computer program product comprising:
- a computer-readable storage medium having program instructions embodied therewith, the computer-readable storage medium being a non-transitory computer-readable storage medium, and execution of the program instructions by a processing circuit cause the processing circuit to perform a method comprising:
- determining a measured capacitance of a capacitor;
- estimating an effective series resistance (ESR) of the capacitor;
- determining, using the measured capacitance and the effective series resistance, a linearized capacitance parameter (CAP) of the capacitor;
- determining, using the CAP and the effective series resistance, an amount of energy remaining in the capacitor;
- and
- signaling should the CAP drop below, or the ESR rise above, a respective specified threshold for the capacitor.
Dependencies are inferred from the claim text.