Method and electronic device for detecting internal short circuit in battery

Patent metadata

Field	Value
Publication number	US-2018180680-A1
Application number	US-201715855868-A
Country	US
Kind code	A1
Filing date	Dec 27, 2017
Priority date	Dec 27, 2016
Publication date	Jun 28, 2018
Grant date	—

Abstract

Embodiments herein provide a method and electronic device for detecting an internal short circuit in a battery. The method includes obtaining, by a battery management system, battery gauge data. Further, the method includes estimating, by the battery management system, an internal resistance of the battery using the battery gauge data. Furthermore, the method includes detecting, by the battery management system, the internal short circuit in the battery by comparing a change in the internal resistance with a pre-defined resistance change threshold value.

First claim

What is claimed is:

1 . A method for detecting an internal short circuit in a battery, the method comprising:
obtaining, by a battery management system, battery gauge data; estimating, by the battery management system, an internal resistance of the battery using the battery gauge data; and detecting, by the battery management system, the internal short circuit in the battery by comparing a change in the internal resistance with a pre-defined resistance change threshold value.

2 . The method of claim 1 , wherein detecting the internal short circuit in the battery by comparing a change in the internal resistance with a pre-defined resistance change threshold value comprises:
applying Haar transform on the estimated internal resistance to measure discontinuity in the internal resistance during a charge-discharge transition; identifying a magnitude of change in the internal resistance based on the Haar transform; and detecting the internal short circuit in the battery when the magnitude of the change in internal resistance is less than the pre-defined resistance change threshold value.

3 . The method of claim 1 , wherein the method further comprises indicating the detected short circuit in the battery to a user.

4 . The method of claim 3 , wherein indicating the detected short circuit comprises providing an alert message about failure of the battery.

5 . The method of claim 3 , wherein indicating the detected short circuit comprises scheduling replacement of the battery.

6 . The method of claim 3 , wherein indicating the detected short circuit comprises indicating safety limit of charging the battery according to a minimum voltage.

7 . The method of claim 3 , wherein indicating the detected short circuit comprises transmitting an indication about the detected short circuit to at least one connected electronic devices of the user.

8 . The method of claim 1 , wherein the battery gauge data is stored periodically during charge-discharge transition for detecting the internal short circuit in the battery.

9 . The method of claim 1 , wherein the battery gauge data comprises at least one of voltage, current, temperature, total battery capacity, an internal impedance, a state of charge of the battery, a number of charging cycles, a number of discharging cycles, a discharge capacity, usage information of an electronic device that includes the battery, or usage information of each application installed in the electronic device.

10 . A method for detecting an internal short circuit in a battery, the method comprising:
obtaining battery gauge data from each battery among a plurality of batteries; estimating an internal resistance of each battery using the battery gauge data; detecting the internal short circuit in the battery by comparing a change in the internal resistance with a pre-defined resistance change threshold value; determining a fault index value of a plurality of batteries; and identifying the plurality of batteries as faulty batteries by comparing the fault index value with a pre-defined fault index value.

11 . The method of claim 10 , wherein the method further comprises indicating the faulty batteries among the plurality of batteries to a user.

12 . An electronic device for detecting an internal short circuit in a battery, the electronic device comprises:
a battery management system configured to:
obtain battery gauge data;
estimate an internal resistance of the battery using the battery gauge data; and
detect the internal short circuit in the battery by comparing a change in the internal resistance with a pre-defined resistance change threshold value.

13 . The electronic device of claim 12 , wherein the battery management system configured to determine the internal short circuit in the battery by:
applying a Haar transform on the estimated internal resistance to measure discontinuity in the internal resistance during a charge-discharge transition; identifying a magnitude of change in the internal resistance based on the Haar transform; and detecting the internal short circuit in the battery when the magnitude of the change in internal resistance is less than the pre-defined resistance change threshold value.

14 . The electronic device of claim 12 , wherein the battery management system is further configured to indicate the detected short circuit in the battery to a user.

15 . The electronic device of claim 14 , wherein the battery management system configured to indicate the detected short circuit by providing an alert message about failure of the battery.

16 . The electronic device of claim 14 , wherein the battery management system configured to indicate the detected short circuit by scheduling replacement of the battery.

17 . The electronic device of claim 14 , wherein the battery management system configured to indicate the detected short circuit by indicating a safety limit of charging the battery according to a minimum voltage.

18 . The electronic device of claim 14 , wherein the battery management system configured to indicate the detected short circuit by transmitting an indication about the detected short circuit to at least one connected electronic device of the user.

19 . The electronic device of claim 12 , wherein the battery management system is configured to store battery gauge data periodically during charge-discharge transition for detecting the internal short circuit in the battery.

20 . The electronic device of claim 12 , wherein the battery gauge data comprises at least one of voltage, current, temperature, total battery capacity, an internal impedance, a state of charge of the battery, a number of charging cycles, a number of discharging cycles, a discharge capacity, usage information of the electronic device, or usage information of each application installed in the electronic device.

Assignees

• Samsung Electronics Co Ltd

Inventors

• TAGADE Piyush
• Khandelwal Ashish
• Hariharan Krishnan Seethalakshmy
• Mandli Aravinda Reddy
• Ramachandran Sanoop
• Yadu Ankit
• Paramasivam Periyasamy
• Kang Dough Heun

Classifications

• G01R31/392

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

• G01R31/389 Primary

  Measuring internal impedance, internal conductance or related variables · CPC title

• G01R31/371

  with remote indication, e.g. on external chargers · CPC title

• G08B21/185

  Electrical failure alarms · CPC title

• G01R31/3662 Primary

  Physics · mapped topic