Method and system for monitoring a battery state utilizing a battery twin

Patent metadata

Field	Value
Publication number	US-11999261-B2
Application number	US-201917424709-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Jan 24, 2019
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A method for monitoring a battery state without interruption of functioning a battery system using a battery twin, wherein the battery system includes a plurality of interconnected battery cells, and wherein the battery twin includes a battery twin cell that is identical to one battery cell of the battery system, where the method includes measuring a parameter of the battery cell that describes working conditions of either the battery cell and/or the entire battery system, where the method includes an offline measurement part that includes reproduction of the working conditions described with the measured parameter on the battery twin, such that while the battery twin operate under the reproduced working conditions, at least one further parameter of the battery twin is measured, and after the offline measurement part, the method further includes judging the battery state based on the measured at least one further parameter of the battery twin.

First claim

The invention claimed is:

1. A method for monitoring a battery state without interruption of functioning a battery system utilizing a battery twin, the battery system comprising a plurality of battery cells connected to each other, and the battery twin comprising at least one battery twin cell which is identical to at least one battery cell of the battery cells of the battery system, the method comprising:
measuring at least one parameter of the at least one battery cell of the battery system, the measured at least one parameter describing working conditions of the at least one battery cell and the entire battery system while operating;
performing an offline measurement part comprising:
reproducing the working conditions described with the measured at least one parameter on the battery twin such that the at least one parameter of the battery twin under the reproduced working conditions is equal to the measured at least one parameter of the at least one battery cell of the battery system; and
measuring at least one further parameter of the battery twin while the battery twin is working under the reproduced working conditions;
making a judgment about the battery state based on the measured at least one further parameter of the battery twin after performing the offline measurement part; and
adjusting an actual battery state based on the at least one further parameter of the battery twin measured within the offline measurement part.

2. The method of claim 1 , wherein the actual battery state is estimated based on the at least one measured parameter; and wherein the offline measurement part is accomplished within a specific time interval.

3. The method of claim 2 , wherein between said measuring at least one parameter and the offline measurement part the method comprises:
transferring data comprising information about the measured at least one parameter to the battery twin to reproduce the working conditions described with the measured at least one parameter on the battery twin.

4. The method of claim 1 , wherein between said measuring at least one parameter and the offline measurement part the method comprises:
transferring data comprising information about the measured at least one parameter to the battery twin to reproduce the working conditions described with the measured at least one parameter on the battery twin.

5. The method of claim 4 , wherein said transferring data comprising the information about the measured at least one parameter to the battery twin is implemented via a cloud application.

6. The method of claim 4 , wherein at the step of transferring data that comprise an information about the measured at least one parameter to the battery twin, such data transfer is accomplished through a coupling bypass.

7. The method of claim 1 , wherein the battery twin is fully identical to the battery system.

8. A system for monitoring a battery state without interruption of functioning a battery system utilizing a battery twin, the battery system comprising a plurality of interconnected battery cells, the system comprising:
at least one battery twin comprising at least one battery twin cell which is identical to at least one battery cell of the battery cells of the battery system;
a measurement device which measures at least one parameter of the at least one battery cell of the battery system without interruption of functioning of the battery system, said at least one parameter describing working conditions of the battery system;
a further measurement device which measures at least one further parameter of the battery twin, the at least one further parameter describing a state of the at least one battery twin;
a controller which implements a method for monitoring a battery state without interruption of functioning a battery system utilizing the battery twin;
wherein the method comprises:
measuring at least one parameter of the at least one battery cell of the battery system, the measured at least one parameter describing working conditions of the at least one battery cell and the entire battery system while operating;
performing an offline measurement part comprising:
reproducing the working conditions described with the measured at least one parameter on the battery twin such that the at least one parameter of the battery twin under the reproduced working conditions is equal to the measured at least one parameter of the at least one battery cell of the battery system; and
measuring at least one further parameter of the battery twin while the battery twin is working under the reproduced working conditions;
making a judgment about the battery state based on the measured at least one further parameter of the battery twin after performing the offline measurement part; and
adjusting an actual battery state based on the at least one further parameter of the battery twin measured within the offline measurement part.

9. The system of claim 8 , wherein the battery system and the battery twin are electrically coupled to each other such that analogous signals are directly transferred from the battery system to the battery twin.

10. The system of claim 9 , wherein the battery system and the battery twin are located such that ambient working conditions are shared.

11. The system of claim 8 , wherein the battery system and the battery twin are located such that ambient working conditions are shared.

Assignees

• Siemens Ag

Inventors

• Kolchin Ivan
• Wolfschmidt Holger

Classifications

• B60L58/18 Primary

  of two or more battery modules · CPC title

• G01R31/367

  Software therefor, e.g. for battery testing using modelling or look-up tables · CPC title

• G01R31/386

  using test-loads · CPC title

• G01R31/396

  Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery · CPC title

• G01R31/392

  Determining battery ageing or deterioration, e.g. state of health · CPC title