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Cell state-of-charge inconsistency estimation for LiFePO 4 battery pack ...
Abstract. Identification of cell SOC (state-of-charge) inconsistency for LiFePO 4 battery packs is challenging due to the demanding conditions in hybrid electric vehicles (HEVs) and the relatively flat SOC-OCV (open circuit voltage) curve of LiFePO 4 cells compared to others. We experimentally investigate cell voltages in a small battery pack and propose …
Safety Risk Assessment for Automotive Battery Pack Based on …
DOI: 10.1016/j.jclepro.2024.142889 Corpus ID: 270500141; Safety Risk Assessment for Automotive Battery Pack Based on Deviation and Outlier Analysis of Voltage Inconsistency @article{Huang2024SafetyRA, title={Safety Risk Assessment for Automotive Battery Pack Based on Deviation and Outlier Analysis of Voltage Inconsistency}, …
Online State of Health Estimation for Series-Connected LiFePO₄ Battery Pack Based on Differential Voltage and Inconsistency …
In this article, we proposed an online SoH estimation method for LiFePO4 battery pack based on differential voltage (DV) and inconsistency analysis. According to the aging mechanism of LiFePO4 battery, the region capacity in DV curve is extracted as a health feature to establish an aging model.
Series-connected lithium-ion battery pack health modeling with …
The lithium-ion battery has become the prevalent technology to store and serve electric power. The state of health (SOH) for a battery cell directly influences the working safety and reliability of the host system. Moreover, since the battery cells are series connected for higher terminal voltage, the cell inconsistency will also impact the performance of the …
(PDF) Understanding Discharge Voltage Inconsistency in Lithium …
Herein, the inconsistent voltages of unpacked cells due to varying capacities during discharge are analyzed to provide mechanical reason for inconsistency of battery pack.
Fault diagnosis for cell voltage inconsistency of a battery pack in ...
Cell voltage inconsistency of a battery pack is the main problem of the Electric Vehicle (EV) battery system, which will affect the performance of the battery and the safe operation of electric ...
Fault diagnosis for cell voltage inconsistency of a battery pack in …
Cell voltage inconsistency of a battery pack is the main problem of the Electric Vehicle (EV) battery system, which will affect the performance of the battery and the safe operation of electric vehicles. Z. Chen, R. …
Inconsistency modeling of lithium-ion battery pack based on …
Inconsistency simulation of battery voltage and thermal characteristics. Abstract —The accurate battery pack model is of great significance for the strategy development and functional verification of battery management system with the advantages of …
A novel battery pack inconsistency model and influence degree …
Cell voltage inconsistency in a battery pack is an important signal released by the deterioration of battery performance. In this paper, voltage inconsistency is categorized into static inconsistency and dynamic inconsistency, and the latter contains progressive fluctuation fault and sudden fluctuation fault. For voltage dynamic …
Performance of inconsistency in lithium-ion battery packs for battery ...
Abstract: Inconsistency is common in lithium-ion battery packs and it results in voltage differences. Data from a battery pack with 200 cells connected in serial in a battery energy storage system (BESS) are applied for study. According to the causes of the voltage difference, three cell inconsistencies can be categorized as state-of-charge (SOC), …
A novel battery pack inconsistency model and influence degree analysis of inconsistency …
Cell voltage inconsistency in a battery pack is an important signal released by the deterioration of battery performance. In this paper, voltage inconsistency is categorized into static inconsistency and dynamic inconsistency, and …
Data–Driven Fault Diagnosis and Cause Analysis of …
To eliminate the influence of battery inconsistency and measurement errors, a method of calculating improved correlation coefficients was applied. To isolate various faults accurately using …
Numerical Investigation of Novel Cylindrical Lithium-Ion Battery …
2 · The inconsistent heat distribution greatly limits how well the battery pack performs, as it can lead to the failure of certain cells and result in a substantial voltage …
Inconsistency modeling of lithium-ion battery pack based on …
Inconsistency simulation of battery voltage and thermal characteristics. ... Therefore, parameter correlations should be considered when performing battery pack inconsistency modeling. Moreover, the number of cells in a battery pack can vary significantly in different application scenarios. As a result, the established method needs …
Experiment-free physical hybrid neural network approach for battery pack inconsistency …
Fig. 2 (a) shows the changes of the SOC-OCV curve of the No. 1 battery in the Oxford dataset with aging. The color represents the number of cycles. It can be seen that the plateau on the aging curve gradually becomes smaller or …
Propagation mechanisms and diagnosis of parameter inconsistency within Li-Ion battery packs …
The propagation mechanisms of parameter inconsistency in battery packs are analyzed. • Parameter inconsistency in series- and parallel-connected battery pack models is summarized. • Feature extraction methods for …
Capacity estimation for series-connected battery pack based on …
During the charging process of the battery pack, when a certain cell reaches the cutoff voltage, the battery pack is considered to be fully charged, ... An online SOC and capacity estimation method for aged lithium-ion battery pack considering cell inconsistency. J. Energy Storage, 29 (September 2019) (2020), p. 101250, …
Fault diagnosis for cell voltage inconsistency of a battery pack in ...
Cell voltage inconsistency of a battery pack is the main problem of the Electric Vehicle (EV) battery system, which will affect the performance of the battery and the safe operation of electric vehicles.
Propagation mechanisms and diagnosis of parameter inconsistency within ...
The standard deviation, range, and relative range of the battery pack voltage are calculated and are regarded as features for the analysis of parameter inconsistency. The voltage standard deviation indicates the degree of voltage change. ... Battery pack inconsistency can be characterized by parameter changes in the model, …
An online SOC and capacity estimation method for aged lithium …
In addition, the terminal voltage of the battery pack is the sum of the terminal voltage of each cell. (6) S O C p a c k = {S O C j, 1 ≤ j ≤ N} R 0, p a c k = {R 0, j, 1 ≤ j ≤ N} 3. SOC and capacity estimation method based on multiple time scales for battery pack considering cell inconsistency
Evaluation of battery inconsistency based on information entropy
Scholars also studied the evaluation method of battery inconsistency based on the statistical distribution rule. Shan Yi [1] et al. selected characteristic points on different charge and discharge curves, and took the cell voltage as the evaluation factor and regarded the European distance between different feature points as the evaluation index.
Online diagnosis and prediction of power battery voltage …
The battery terminal voltage in the power battery system is a comprehensive indicator of its internal resistance, capacity, state of charge (SoC) and other parameters, which can more comprehensively assess the safety performance of the battery system, so it is of great significance to accurately diagnose and predict the voltage faults …