Methods for testing a battery and devices configured to test a battery

Patent metadata

Field	Value
Publication number	US-9995794-B2
Application number	US-201414766395-A
Country	US
Kind code	B2
Filing date	Feb 6, 2014
Priority date	Feb 6, 2013
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A method for testing a battery may be provided. The method may include: bringing the battery to a pre-determined voltage; determining a parameter of the battery, the parameter of the battery including at least one of an entropy of the battery at the pre-determined voltage or an enthalpy of the battery at the pre-determined voltage; and determining an ageing history of the battery based on the determined parameter.

First claim

What is claimed is:

1. A method for testing a battery, the method comprising:
bringing the battery to a pre-determined voltage that is associated with at least one of a phase transition or a material change in at least one of an anode of the battery or a cathode of the battery;
changing a temperature of the battery by a pre-determined value;
determining a parameter of the battery at the pre-determined voltage and the temperature of the battery that is changed by the pre-determined value, the parameter of the battery comprising at least one of an entropy of the battery or an enthalpy of the battery; and
retroactively assessing a mode of ageing of the battery based on the determined parameter,
wherein the mode of ageing of the battery comprises information about at least one of a high voltage ageing, a high temperature ageing, or a long cycling ageing.

2. The method of claim 1 , further comprising:
applying the pre-determined voltage to the battery for a pre-determined time; and
determining the parameter after applying the pre-determined voltage for the pre determined time.

3. The method of claim 1 , wherein retroactively assessing the mode of ageing comprises comparing the determined parameter with a reference parameter.

4. The method of claim 3 , wherein the reference parameter is a parameter of a battery which underwent a pre-determined mode of ageing.

5. A device configured to test a battery, the device comprising:
a voltage setting circuit configured to bring the battery to a pre-determined voltage that is associated with at least one of a phase transition or a material change in at least one of any anode of the battery or a cathode of the battery;
a parameter determination circuit configured to change a temperature of the battery by a pre-determined value and to determine a parameter of the battery at the pre-determined voltage and the temperature of the battery that is changed by the pre-determined value, the parameter of the battery comprising at least one of an entropy of the battery or an enthalpy of the battery; and
a history determination circuit configured to retroactively assess a mode of ageing of the battery based on the determined parameter,
wherein the mode of ageing of the battery comprises information about at least one of a high voltage ageing, a high temperature ageing, or a long cycling ageing.

6. The device of claim 5 , wherein the voltage setting circuit is configured to apply the pre-determined voltage to the battery for a pre-determined time; and
wherein the parameter determination circuit is configured to determine the parameter after applying the pre-determined voltage for the pre-determined time.

7. The device of claim 5 , wherein the history determination circuit is configured to retroactively assess the mode of ageing based on comparing the determined parameter with a reference parameter.

8. The device of claim 7 , wherein the reference parameter is a parameter of a battery which underwent a pre-determined mode of ageing.

Assignees

• Univ Nanyang Tech

Inventors

• Yazami Rachid
• Maher Kenza

Classifications

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• G01R31/3679 Primary

  Physics · mapped topic

• G01R31/3651

  Physics · mapped topic

• G01R31/392 Primary

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

• G01R31/367

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