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Online State of Health Estimation for Series-Connected LiFePO₄ Battery ...
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.
Voltage-correlation based multi-fault diagnosis of lithium-ion battery ...
Section snippets State estimation. A battery pack with n series-connected cells is considered in this study, and n + 1 voltage sensors are required to measure n cell voltages and the pack voltage. The measurement topology is shown in Fig. 1 where I denotes the current, and is positive when the batteries are charged, r i is the connection …
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 …
Voltage-correlation based multi-fault diagnosis of lithium-ion battery ...
Non-model-based diagnostic methods are also used for fault diagnosis in battery systems (Xia and Mi, 2016; Zhao et al., 2017a).A fault diagnosis method based on big data analysis was proposed by (Zhao et al., 2017b), where abnormal changes in terminal voltages were detected using a machine learning algorithm and 3σ multi-level screening …
Evaluation of battery inconsistency based on information entropy
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 …
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 …
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 ...
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 …
Battery module capacity fade model based on cell voltage inconsistency ...
When establishing a model for cell capacity fade, there are generally two methods: (1) one method is mainly based on chemical change inside cells, such as the loss of lithium-ion, 4 the growth of solid–electrolyte interface (SEI) layer, 5 and the variation law of the impedance of cells. 6,7 However, the aging mechanism is unclear by now and the …
Fault diagnosis for cell voltage inconsistency of a battery pack in ...
DOI: 10.1016/j peleceng.2022.108095 Corpus ID: 249812595; Fault diagnosis for cell voltage inconsistency of a battery pack in electric vehicles based on real-world driving data
Effects analysis on active equalization control of lithium-ion ...
It can select any number of inductors less than half the number of batteries, even when the voltage level of the battery pack is determined. To improve the inconsistency of series battery packs, Xiong et al. [30] innovatively proposed an equalization circuit based on a flyback converter. Compared with the traditional …
Fault diagnosis for cell voltage inconsistency of a battery pack in ...
Cell voltage inconsistency in a battery pack is an important signal released by the deterioration of battery performance. In this paper, voltage …
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 …
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, …
Safety risk assessment for automotive battery pack based on …
Therefore, voltage inconsistency can be used for battery fault diagnosis and prognosis in a full life span (Huang et al., 2020; Lu et al., 2020; Wu et al., 2021). Battery consistency also strongly influences the performance of the battery pack (Zhang, C.P. et al., 2017). Poor consistency can reduce the power performance and service life of ...
Understanding Discharge Voltage Inconsistency in Lithium-Ion …
In electric vehicles (EVs), owing to the necessity of large amounts of energy and power, lithium-ion batteries need to be used in series and parallel configurations. However, the performance of the battery pack is lower than that of any single cell within the pack because of the inconsistency among the packed cells. Herein, the inconsistent …
Cell state-of-charge inconsistency estimation for LiFePO4 battery pack ...
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 …
A novel method for fault diagnosis and type identification of cell ...
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 …
Safety risk assessment for automotive battery pack based on …
This paper introduces a novel comprehensive risk assessment method centered on voltage inconsistency analysis, dividing voltage into three SOC-based …
Estimating SOC and SOH of energy storage battery pack based on voltage ...
Download Citation | On Mar 1, 2024, A. Xianmin Mu and others published Estimating SOC and SOH of energy storage battery pack based on voltage inconsistency using reference-difference model and ...
Research on Inconsistency Evaluation of Retired Battery Systems …
Inconsistency is a key factor triggering safety problems in battery packs. The inconsistency evaluation of retired batteries is of great significance to ensure the safe and stable operation of batteries during subsequent gradual use. This paper summaries the commonly used diagnostic methods for battery inconsistency assessment. The local …
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.
Feature Fusion-Based Inconsistency Evaluation for Battery Pack ...
The large-scale grouping of the battery system leads to the inconsistency of the battery pack. Aiming at tacking this issue, an inconsistency evaluation method is deployed for the battery pack based on an improved Gaussian mixture model (GMM) and feature fusion approach. Specifically, the proposed adaptive forgetting factor recursive least squares …
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}, …
Fault diagnosis for cell voltage inconsistency of a battery pack in ...
Fault diagnosis for cell voltage inconsistency of a battery pack in electric vehicles based on real-world driving data. Weidong Fang, Hanlin Chen, Fumin …
Inconsistency modeling of lithium-ion battery pack based on …
The battery inconsistency modeling based on VAE is to realize the parameter generation owning the same distribution of each parameter with the battery …
Estimating SOC and SOH of energy storage battery pack based on voltage ...
DOI: 10.1016/j.est.2023.110221 Corpus ID: 267284680; Estimating SOC and SOH of energy storage battery pack based on voltage inconsistency using reference-difference model and dual extended Kalman filter
Joint Estimation of Inconsistency and State of Health for Series ...
The voltage inconsistency will cause the battery pack voltage at the current switch points to decrease during the aging process. In the test strategy, there is a current switch at the change point, which causes a voltage drop correspondingly, through which the internal resistance could be obtained.
Feature Fusion-Based Inconsistency Evaluation for Battery Pack ...
Aiming at tacking this issue, an inconsistency evaluation method is deployed for the battery pack based on an improved Gaussian mixture model (GMM) and feature fusion …
Experiment-free physical hybrid neural network approach for battery ...
Estimate the battery inconsistency parameters based on the similarity of the battery SOC-OCV curves with the BMS data. • Combine the neural network and equivalent circuit model to simultaneously estimate the capacity, internal resistance and SOC parameters of each cell in the battery pack.
Cell state-of-charge inconsistency estimation for LiFePO4 battery pack ...
A novel approach to estimate SOC inconsistency for Li-ion battery pack with reference-plus-difference model where thereference model represents the overall performance of the battery pack and an electrochemical model is used as the reference model for its high-fidelity, low parameter sensitivity, and the capability of estimating cell …
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 Cell Inconsistency in Lithium-Ion Battery Pack …
Abstract: Cell inconsistency is a common problem in the charging and discharging of lithium-ion battery (LIB) packs that degrades the battery life. In situ, real-time data can be obtained from the battery energy storage system (BESS) of an electric boat through telemetry. This article examined the use of a 57-kWh BESS comprising six battery ...
An inconsistency assessment method for backup battery packs …
[17] considered the open circuit voltage as an eigenvalue and used the standard deviation to assess battery pack inconsistency, while (Bing [14]) used the correlation coefficient of voltage curves. When the correlation coefficient was lower than 0.5, the degree of inconsistency within the cell was considered to be high.