Deviation detection system for energy storage system

Patent metadata

Field	Value
Publication number	US-11327121-B2
Application number	US-201916374447-A
Country	US
Kind code	B2
Filing date	Apr 3, 2019
Priority date	Apr 3, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A system includes a first group of sensors and a control circuit including one or more processors. The first group of sensors is associated with an energy storage module having one or more energy storage devices. The sensors in the first group generate sensor measurements representing one or more parameters of the energy storage module. The control circuit is configured to receive the sensor measurements and determine one or more of a reference value or a reference variation of a specific parameter related to the energy storage module based at least in part on the sensor measurements. The control circuit compares one or more of monitored values or monitored variations of the specific parameter, based on the sensor measurements generated by sensors, to the reference value or the reference variation of the specific parameter and detects a deviation that is greater than a designated tolerance margin.

First claim

What is claimed is:

1. A system comprising:
a first group of sensors associated with an energy storage module that includes multiple energy storage devices, the sensors in the first group configured to generate sensor measurements representing one or more parameters of the energy storage module; and
a control circuit including one or more processors, the control circuit configured to receive the sensor measurements generated by the sensors and determine one or more of (i) a reference value of a specific parameter of the one or more parameters over time based at least in part on the sensor measurements generated by at least two of the sensors in the first group and corresponding to at least two of the energy storage devices of the energy storage module, or (ii) a reference variation of the specific parameter of the one or more parameters over time based at least in part on the sensor measurements generated by the at least two sensors in the first group and corresponding to the at least two energy storage devices of the energy storage module,
the control circuit is configured to compare one or more of a monitored value of the specific parameter, based on the sensor measurements generated by the sensors of the first group, to the reference value, or a monitored variation of the specific parameter, based on the sensor measurements generated by the sensors of the first group, to the reference variation, and detect a deviation condition responsive to one or more of (i) a rate of change of the monitored value differing from a rate of change of the reference value by more than a designated tolerance margin or (ii) the monitored variation between two monitored values of the specific parameter exceeding the reference variation by more than the designated tolerance margin, wherein the two monitored values that define the monitored variation are based on the sensor measurements generated by two different sensors in the first group, and
responsive to detecting the deviation condition, the control circuit is configured to generate a control signal configured to change an operating condition of the energy storage module; wherein the operating condition of the energy storage module is changed based on the control signal.

2. The system of claim 1 , wherein the control circuit is configured to determine the reference value or the reference variation of the specific parameter based on the sensor measurements generated by the first group of sensors associated with the energy storage module and one or more of: (i) sensor measurements generated by a second group of sensors associated with a different, second energy storage module, (ii) inherent characteristics of the energy storage module, (iii) operating conditions of the energy storage module, or (iv) historical information about the energy storage module or about other energy storage modules.

3. The system of claim 1 , wherein, responsive to detecting the deviation condition, the control circuit is configured to identify a particular sensor in the first group that generated sensor measurements on which the monitored value that deviates or the monitored variation that deviates is based, and
the control circuit is configured to estimate a cause of the deviation by comparing the sensor measurements generated by the particular sensor to sensor measurements generated by other sensors in the first group or generated by other sensors in a second group associated with a different, second energy storage module.

4. The system of claim 1 , wherein the control signal is configured to change the operating condition of the energy storage module by one or more of blocking electric current transfer of the energy storage module, adjusting a non-zero rate of electric current transfer of the energy storage module, adjusting an ambient temperature surrounding the energy storage module, adjusting a temperature conditioning rate around the energy storage module, inducing a designated load on the energy storage module, initiating active cooling, initiating fire suppression, or flagging the energy storage module for repair.

5. The system of claim 1 , wherein the control circuit is configured to identify a particular sensor in the first group that generated sensor measurements on which the monitored value that deviates or the monitored variation that deviates is based, and
the control circuit is configured to monitor additional sensor measurements generated by the particular sensor during a determined period of time after changing the operating condition of the energy storage module, the control circuit configured to estimate a cause of the deviation based at least in part on the additional sensor measurements generated by the particular sensor during the determined period of time.

6. The system of claim 1 , wherein the control circuit is further configured to detect the deviation condition independent of any of the sensor measurements exceeding a preset threshold value.

7. The system of claim 1 , wherein the energy storage module comprises multiple battery cells connected to one another in series or in parallel.

8. The system of claim 1 , wherein the specific parameter is one of temperature, voltage, current, power, state of charge, charge capacity, pressure, coolant flow rate, or resistance.

9. The system of claim 1 , wherein the control circuit is configured to determine the reference value or the reference variation of the specific parameter based on a physics-based model that incorporates inherent characteristics of the energy storage module, operating conditions of the energy storage module, and historical information about the energy storage module.

10. The system of claim 1 , wherein the control circuit is configured to determine the reference value or the reference variation of the specific parameter at least in part by compiling the sensor measurements representing the specific parameter that are generated by the at least two sensors in the first group and corresponding to the at least two energy storage devices of the energy storage module.

11. The system of claim 1 , wherein the control circuit and the first group of sensors are disposed onboard a vehicle that is propelled at least in part by the energy storage module.

12. The system of claim 1 , wherein the control circuit is configured to determine the reference value by compiling the sensor measurements representing the specific parameter that are generated by the at least two sensors in the group and corresponding to the at least two energy storage devices of the energy storage module, and calculating a statistical metric of the sensor measurements that are compiled.

13. The system of claim 1 , wherein the control circuit is configured to compare the monitored variation of the specific parameter to the reference variation of the specific parameter and detect the deviation condition responsive to the monitored variation between the two monitored values of the specific parameter exceeding the reference variation by more than the designated tolerance margin.

14. A method comprising:
obtaining sensor measurements generated by a first group of sensors associated with an energy storage module, the energy storage module including multiple energy storage devices, the sensor measurements representing one or more parameters of the energy storage module;
determining one or more of (i) a reference value of a specific parameter of the one or more parameters over time based at least in part on the sensor measurements generated by at least two of the sensors in the first group and corresponding to at least two of the energy storage devices of the energy storage module, or (ii) a reference var

Assignees

• Ge Global Sourcing Llc
• Transp Ip Holdings Llc

Inventors

• Pressman Jacob
• Kumar Ajith Kuttannair

Classifications

• G05B2219/2639

  Energy management, use maximum of cheap power, keep peak load low · CPC title

• G01R31/3648

  comprising digital calculation means, e.g. for performing an algorithm · CPC title

• G05B23/0213

  Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols · CPC title

• G05B23/0235 Primary

  based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold · CPC title

• G05B19/042

  using digital processors (G05B19/05 takes precedence) · CPC title