US 11,906,589 B2 · Systems, methods, and devices for determining whether a state-of-charge estimate of an energy storage system is tracking

Abstract

Systems, methods, and devices are provided for estimating a state-of-charge in an energy storage system. The systems, methods, and devices may measure a current and a voltage related to the energy storage system, generate a model-based state-of-charge estimate based thereon, generate an aggregated state-of-charge estimate based on the model-based state-of-charge estimate, generate an adaptation current based on the measured current, aggregated state-of-charge estimate, and the adaptive state-of-charge estimate, and update the adaptive state-of-charge estimate based on the measured current and the adaptation current. The systems, methods, and devices may also provide a tracking indication whether the adaptive state-of-charge estimate is tracking between upper and lower confidence limits.

Claims21

Dependent claims

A method of determining whether a state-of-charge estimate of an energy storage system is tracking, the method comprising:

measuring, by a current measurement module comprising a current sensor, a current related to the energy storage system to ascertain a measured current;
measuring, by a voltage measurement module comprising a voltage sensor, a voltage related to the energy storage system to ascertain a measured voltage;
determining, by an estimator module, a model-based state-of-charge estimate for the energy storage system based on the measured current and the measured voltage;
determining, by the estimator module, a model-based standard error based on the measured current and the measured voltage;
determining, by a tracking module, an upper confidence limit and a lower confidence limit based on the model-based state-of-charge estimate and the model-based standard error;
and
providing, by the tracking module, a tracking signal that indicates whether an output state-of-charge estimate is tracking between the upper confidence limit and the lower confidence limit;
wherein the estimator module and the tracking module are implemented on one or more processors.

5 more elements

A device for determining whether a state-of-charge of an energy storage system is tracking, comprising:

a current measurement circuit to measure a current related to the energy storage system to ascertain a measured current;
a voltage measurement circuit to measure a voltage related to the energy storage system to ascertain a measured voltage;
a tangible, non-transitory memory configured to communicate with one or more processors, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by one or more of the processors, cause the processor to perform operations;
an estimator module including at least one of the one or more processors, the estimator module configured to generate, by the one or more processors, a model-based state-of-charge estimate based on the measured current and the measured voltage, and configured to generate a model-based standard error based on the measured current and the measured voltage;
a tracking module including at least one of the one or more processors, the tracking module configured to:
(1) generate, by the one or more processors, an upper confidence limit and a lower confidence limit;
and
(2) provide a tracking signal that indicates whether an output state-of-charge estimate is tracking between the upper confidence limit and the lower confidence limit.

5 more elements

A system for determining whether a state-of-charge of an energy storage system is tracking comprising:

an energy storage system;
and
a device for generating an output state-of-charge estimate for the energy storage system, the device comprising:
a current measurement circuit configured to measure a current related to the energy storage system to ascertain a measured current;
a voltage measurement circuit configured to measure a voltage related to the energy storage system to ascertain a measured voltage;
a tangible, non-transitory memory configured to communicate with one or more processors, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by one or more of the processors, cause the processor to perform operations;
an estimator module including at least one of the one or more processors, the estimator module configured to generate, by the one or more processors, a model-based state-of-charge estimate based on the measured current and the measured voltage, and configured to generate, by the one or more processors, a model-based standard error based on the measured current and the measured voltage;
and
a tracking module including at least one of the one or more processors, the tracking module configured to generate, by the one or more processors, an upper confidence limit and a lower confidence limit, and to provide a tracking signal that indicates whether the output state-of-charge estimate is tracking between the upper confidence limit and the lower confidence limit.

6 more elements

Dependencies are inferred from the claim text.

Systems, methods, and devices for determining whether a state-of-charge estimate of an energy storage system is tracking

Life of this patent

Systems, methods, and devices for determining whether a state-of-charge estimate of an energy storage system is tracking

Life of this patent

Abstract

Claims21