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Vehicle battery health state assessment method and system

A battery health status and evaluation system technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve problems such as poor accuracy of battery health status evaluation, and achieve the effect of authentic and reliable data sources and accurate evaluation results

Active Publication Date: 2021-06-29
WUHAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0003] In the prior art, charge and discharge experiments are generally carried out under laboratory conditions with constant voltage and constant current, or to simulate the actual vehicle operating conditions and environment as much as possible. The simulation process lacks road conditions, driver habits, data acquisition errors, etc. Factors considered, the accuracy of battery health assessment is not good

Method used

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  • Vehicle battery health state assessment method and system
  • Vehicle battery health state assessment method and system
  • Vehicle battery health state assessment method and system

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Embodiment 1

[0048] Embodiment one, see figure 1 , an aspect of the present invention provides a method for evaluating the state of health of a vehicle battery, comprising:

[0049] Step S02, obtaining historical operating data of the vehicle battery;

[0050] Step S04, dividing the historical operation data into a plurality of segments, and filtering out the segments satisfying preset conditions to form a first set;

[0051] Step S06, correcting the battery capacity and battery energy of the segments in the first set;

[0052] Step S08, constructing multiple battery health status evaluation indicators based on the corrected first set to be used as model feature values, and tuning the model feature values ​​through various machine learning models to obtain the vehicle battery Health status assessment results.

[0053] The present invention evaluates the health state of the battery based on the historical operating data of the real vehicle battery, compared with the related art in which th...

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Abstract

The invention discloses a vehicle battery health state assessment method and system. The method comprises the steps of obtaining historical operation data of a vehicle battery; dividing the historical operation data into a plurality of fragments, and screening out the fragments meeting a preset condition to form a first set; correcting the battery capacity and the battery energy of the fragments in the first set; and constructing a plurality of battery health state evaluation indexes based on the corrected first set to serve as model feature values, and adjusting and optimizing the model feature values through a plurality of machine learning models to obtain an evaluation result of the vehicle battery health state. The battery health state is evaluated based on the historical operation data of a real vehicle battery, a data source is more real and reliable, and an evaluation result is more accurate.

Description

technical field [0001] The invention relates to the technical field of electric vehicle management, in particular to a method and system for assessing the state of health of a vehicle battery. Background technique [0002] At present, the rapid development of electric vehicles has occupied an unshakable position in life. In recent years, it has also become a major development target of the automotive industry worldwide. However, the evaluation of the health status of electric vehicle batteries is still a major difficulty that needs to be overcome urgently. [0003] In the prior art, charge and discharge experiments are generally carried out under laboratory conditions with constant voltage and constant current, or to simulate the actual vehicle operating conditions and environment as much as possible. The simulation process lacks road conditions, driver habits, data acquisition errors, etc. Considering the factors, the accuracy of battery health status assessment is not good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/367G06F30/27G06K9/62G06N20/00
CPCG01R31/392G01R31/367G06F30/27G06N20/00G06F18/23213Y02T10/40
Inventor 胡杰翁灵隆高志文杨博闻
Owner WUHAN UNIV OF TECH
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