Prediction method for residual life of lithium battery

A life prediction, lithium battery technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of state of charge decline, not fundamentally resolved, etc., to avoid trouble and loss, good prediction efficiency and prediction The effect of precision

Active Publication Date: 2019-12-13
TAIYUAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

At present, the materials and production level of batteries have been greatly improved, but the problem of the decline of the state of charge has not been fundamentally solved.

Method used

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  • Prediction method for residual life of lithium battery
  • Prediction method for residual life of lithium battery
  • Prediction method for residual life of lithium battery

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Embodiment Construction

[0057] The technical solutions of the present invention will be further described in more detail below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0058]The invention provides a method for predicting the remaining life of a lithium battery, the steps of the method comprising:

[0059] Step 1: Extract the lithium battery capacity data, current voltage temperature and corresponding time data from the lithium battery operating data as the remaining life prediction data of the lithium battery, divide the remaining life prediction data of the lithium battery into two groups, one group is the training set, and the other One set is the test set;

[0060] ...

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Abstract

The invention discloses a prediction method for residual life of a lithium battery. The method comprises the following steps of: performing multi-scale decomposition on dischargeable capacity by usingempirical mode decomposition, predicting decomposed information by using different methods respectively, and adding results to obtain the dischargeable capacity of the lithium battery and further obtain the residual life of the lithium battery. According to the invention, the state of charge and the residual life of the battery can be effectively predicted, the prediction efficiency and the prediction precision are high, the future working capability of the battery is effectively judged, problems are found in time, and unnecessary troubles and losses are avoided.

Description

technical field [0001] The invention relates to the field of lithium battery life prediction, in particular to a lithium battery remaining life prediction method. Background technique [0002] Lithium battery is a new type of energy, because of its high working voltage, large specific energy, high charge and discharge efficiency, low self-discharge rate, no memory effect, long cycle life and other advantages, it has replaced traditional lead storage, nickel-cadmium and other batteries , And applied in mobile phones, computers, electric vehicles and many other fields. However, during the long-term use of lithium batteries, the discharge capacity of lithium iron phosphate batteries gradually decreases due to a series of physical and chemical changes that occur inside them, that is, the battery's state of health (State of Health, state of charge) gradually decreases, and it will be damaged. Related equipment, in severe cases, will lead to the collapse of the entire system, and...

Claims

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Application Information

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IPC IPC(8): G01R31/367G01R31/392
CPCG01R31/367G01R31/392
Inventor 陈泽华乔建澍刘忆恩陈凯华刘晓峰
Owner TAIYUAN UNIV OF TECH
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