Method and apparatus for predicting remaining useful life (rul) of battery

Patent metadata

Field	Value
Publication number	US-2016259013-A1
Application number	US-201615055685-A
Country	US
Kind code	A1
Filing date	Feb 29, 2016
Priority date	Mar 3, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

Disclosed is a method of predicting a remaining useful life (RUL) including measuring an operating current during a charging cycle and a discharging cycle of a battery, calculating a capacity fade of a plurality of cycles of the battery based on degradation parameters and the measured operating currents, and predicting an RUL of the battery based on the calculated capacity fade.

First claim

What is claimed is:

1 . A method of predicting a remaining useful life (RUL), the method comprising:
measuring an operating current during a charging cycle and a discharging cycle of a battery; calculating a capacity fade for a plurality of cycles of the battery based on degradation parameters and the measured operating currents; and predicting an RUL of the battery based on the capacity fade.

2 . The method of claim 1 , wherein the degradation parameters comprises at least one of an operating temperature, a minimum state of charge (SOC), a maximum SOC, or a material property.

3 . The method of claim 1 , further comprising displaying the predicted RUL to indicate a time remaining until the battery reaches an end-of-life (EOL) state.

4 . The method of claim 1 , wherein the battery comprises a plurality of cells, and the method further comprises:
identifying, from the plurality of cells, a cell having a least capacity; and displaying through a user interface a recommendation to replace the identified cell.

5 . The method of claim 1 , further comprising displaying a number of charging cycles remaining until the battery reaches an end-of-life (EOL) state.

6 . The method of claim 1 , further comprising displaying RULs corresponding to different operating temperatures of the battery, each of the RULs indicating a time remaining until the battery reaches an end-of-life (EOL) state when operated at an operating temperature.

7 . An apparatus for predicting a remaining useful life (RUL) of a battery, the apparatus comprising:
a predictor configured to measure an operating current during a charging cycle and a discharging cycle of a battery, to calculate a capacity fade of a plurality of cycles of the battery based on degradation parameters and the measured operating currents, and to predict an RUL of the battery based on the calculated capacity fade.

8 . The apparatus of claim 6 , further comprising a controller comprising sensors configured to determine the degradation parameters.

9 . The apparatus of claim 6 , wherein the degradation parameters comprises at least one of an operating temperature, a minimum state of charge (SOC), a maximum SOC, or a material property.

10 . The apparatus of claim 6 , wherein the predictor is further configured to control a display of the predicted RUL to indicate a time remaining until the battery reaches an end-of-life (EOL) state.

11 . A non-transitory computer readable storage medium comprising a computer executable program code to cause a computer program to perform:
measuring an operating current during a charging cycle and a discharging cycle of a battery; calculating a capacity fade of a plurality of cycles of the battery based on degradation parameters and the measured operating currents; and predicting a remaining useful life (RUL) of the battery based on the calculated capacity fade.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Basu Suman
• Seethalakshmy Hariharan Krishnan

Classifications

• G01R31/367

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

• G01R31/3828

  using current integration · CPC title

• G01R31/392 Primary

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

• G01R31/3679 Primary

  Physics · mapped topic

• G01R31/3634

  Physics · mapped topic