Methods for testing a battery and devices configured to test a battery
US-2015377977-A1 · Dec 31, 2015 · US
Device for estimating a lifetime of a secondary battery and method thereof
US9360531B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9360531-B2 |
| Application number | US-201213450421-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 18, 2012 |
| Priority date | Dec 23, 2011 |
| Publication date | Jun 7, 2016 |
| Grant date | Jun 7, 2016 |
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Abstract
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Embodiments of the present invention provide an accelerated lifetime estimation device for predicting the lifetime of a secondary battery, and a method thereof. The accelerated lifetime estimation device can accurately estimate a normal lifetime of the secondary battery while reducing an evaluation time period of the secondary battery.
First claim
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What is claimed is: 1. A device for estimating a lifetime of a battery to evaluate a battery design of the battery in an accelerated amount of time, the device comprising: a battery evaluation device configured to charge and discharge the battery and to measure first battery life test data and second battery life test data from the battery; an input unit configured to receive the first battery life test data and the second battery life test data of the battery from the battery evaluation device, the first battery life test data and the second battery life test data corresponding to different conditions in the accelerated amount of time; and a processor operatively coupled with the input unit, the processor being configured to determine one or more parameters from the first battery life test data and the second battery life test data, calculate an acceleration factor (AF) correlating the first battery life test data and the second battery life test data in accordance with performing one or more mathematical operations on the one or more parameters, and predict an estimated lifetime of the battery in accordance with the AF and the second battery life test data to evaluate the battery design, wherein the processor comprises: a parameter extractor configured to extract the one or more parameters from the first battery life test data and the second battery life test data; an acceleration factor calculator configured to calculate the AF in accordance with the one or more parameters; and a prediction unit configured to predict the estimated lifetime of the battery in accordance with the AF, and wherein the acceleration factor calculator is configured to calculate the AF by using an equation associated with a semi-empirical lifetime model that is defined as A F = t ( normal ) t ( accelerated ) = C - rate ( a ) C - rate ( n ) × Swing ( n ) Swing ( a ) × ( A a ( C - rate ( a ) , Swing ( a ) ) A n ( C - rate ( n ) , Swing ( n ) ) ) 2 , where t(normal) is a normal lifetime test time period for a first battery lifetime test for obtaining the first battery life test data, t(accelerated) is an accelerated lifetime test time period for a second battery lifetime test for obtaining the second battery life test data, C-rate(n) is a charge and/or discharge current used in the first battery lifetime test, C-rate(a) is a charge and/or discharge current used in the second battery lifetime test, Swing(n) is a charge and/or discharge cut-off voltage used in the first battery lifetime test, Swing(a) is a charge and/or discharge cut-off voltage used in the
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Classifications
Physics · mapped topic
- G01R31/3679Primary
Physics · mapped topic
Physics · mapped topic
- G01R31/36Primary
Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] · CPC title
comprising digital calculation means, e.g. for performing an algorithm · CPC title
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Frequently asked questions
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- What does patent US9360531B2 cover?
- Embodiments of the present invention provide an accelerated lifetime estimation device for predicting the lifetime of a secondary battery, and a method thereof. The accelerated lifetime estimation device can accurately estimate a normal lifetime of the secondary battery while reducing an evaluation time period of the secondary battery.
- Who is the assignee on this patent?
- Suh Seung Bum, Chai Heekwan, Shin Jeongsoon, and 16 more
- What technology area does this patent fall under?
- Primary CPC classification G01R31/3679. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 07 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).