The inconsistency, which is cell to cell variations within battery packs, is a key factor influencing the performance of battery packs , , . The inconsistency not only affects the output power and energy of the battery pack, but also relates to the state of health and safety of the battery pack , .
Robust estimation of the state of charge (SOC) is crucial for providing the driver with an accurate indication of the remaining range. This paper presents the state of art of battery pack SOC estimation methods along with the impact of cell inconsistency on pack performance and SOC estimation.
Therefore, the influence degree of the battery pack inconsistency on the output energy needs to be studied based on a battery pack inconsistency model, a newly built experimental platform with adjustable battery pack inconsistency parameters, and the method of multiple linear regression analysis. 1.2. Contributions of this work
Thirdly, the parameters of the battery pack inconsistency model are divided into GMM and MCM model parameters according to the established inconsistency model, and multiple linear regression analysis is used to study the influence degree of these two parts model parameters on output energy respectively.
When the degree of the battery pack inconsistency does not exceed the threshold, it is judged to be normal. Otherwise, the corresponding measures need to be taken to reduce the inconsistency of the battery pack, such as equalization management and thermal management.
There is a complex coupling network between the internal and external parameters of a battery pack. Parameter variations can interact with each other, develop positive or negative correlations, and aggravate parameter inconsistency. This acts as the principle propagation mechanism of parameter inconsistency within battery packs.
Performance of inconsistency in lithium-ion battery packs for battery …
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...
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Bidirectional Active Equalization Control of Lithium Battery Pack …
The method proposed in this paper increases the energy transfer circuit, and effectively reduces the balancing time by improving the balancing speed and efficiency of SOC …
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A Novel Battery Balancing Topology Coupled with Battery …
Abstract: The inconsistency between series-connected batteries is a key factor affecting the high performance and lifespan of lithium-ion battery packs. Therefore, a battery balancing system is …
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Energy Equalization of Battery Pack with Inconsistent Capacity
In this paper, a balancing strategy based on model predictive control(MPC) is presented to achieve the dynamic equalization of SOC under the condition of inconsistent capacities. Considering the battery capacities, an optimization algorithm is presented to optimize the input power and output power of the equalizers for the different working ...
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Variability in Battery Pack Capacity
But the real picture is complicated by the presence of cell-to-cell variation. Such variations can arise during the manufacturing process—electrode thickness, electrode density (or porosity), the weight …
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Lithium-Ion Battery Pack Robust State of Charge Estimation, Cell ...
This paper presents the state of art of battery pack SOC estimation methods along with the impact of cell inconsistency on pack performance and SOC estimation. Cell balancing methods,...
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Novel Active Battery Balancing Methodologies for Lithium Batteries…
Inconsistency in the battery pack parameters results in an uneven state of charge (SoC). The active battery balancing method is an approach to equalize the SoC of the battery cells in a battery pack.
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Integrated Framework for Battery Cell State-of-Health Estimation …
2 · A switchable indicator for active balance of the lithium-ion battery pack using a bypass equalizer. Journal of Energy Storage, 68 (2023), Article 107696, 10.1016/j.est.2023.107696. …
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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 ...
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Propagation mechanisms and diagnosis of parameter …
Li-ion battery pack inconsistency diagnosis depends mainly on extracting a set of features that can evaluate inconsistency and distinguish its causes. Diagnostic methods for …
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A novel battery pack inconsistency model and influence degree …
Two groups of battery packs with different inconsistency parameter characteristics are designed based on the battery pack inconsistency quantification experimental platform to verify the accuracy of the inconsistency model, the parameters generation method and the output energy estimation.
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Evaluation of Cell Inconsistency in Lithium-Ion Battery Pack Using …
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 …
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A Novel Battery Balancing Topology Coupled with Battery …
Abstract: The inconsistency between series-connected batteries is a key factor affecting the high performance and lifespan of lithium-ion battery packs. Therefore, a battery balancing system is needed to achieve effective energy balance. Traditional battery balancing is mainly divided into three methods: P2C (Pack to Cell), C2P (Cell to Pack ...
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Performance of inconsistency in lithium-ion battery packs for battery …
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 ...
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Active balancing strategy for AUV power battery pack based on …
Wang Y G et al. [10] estimated the battery SOC using EKF algorithm based on an equivalent circuit model, combined with a small active equalisation circuit to achieve the battery pack equalisation control.Liu R et al. [11] also used EKF algorithm for estimating the battery SOC, and balanced the inconsistency of the battery pack by using capacitive circuit.
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Bidirectional Active Equalization Control of Lithium Battery Pack …
The lithium battery pack balancing control process needs to detect the charging and discharging state of each individual battery. Figure ... It can be seen that this method achieves the balance of SOC and voltage, reduces the inconsistency of the battery pack, and avoids the influence of single overcharge on the service life. It can be seen from the SOC …
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Energy Equalization of Battery Pack with Inconsistent Capacity
In this paper, a balancing strategy based on model predictive control(MPC) is presented to achieve the dynamic equalization of SOC under the condition of inconsistent capacities. …
Learn More
Bidirectional Active Equalization Control of Lithium Battery Pack …
The method proposed in this paper increases the energy transfer circuit, and effectively reduces the balancing time by improving the balancing speed and efficiency of SOC and voltage of series lithium battery packs, thus improving their charge and discharge performance, reducing the inconsistency of batteries, and extending their service life ...
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Influence of equalization on LiFePO4 battery inconsistency
The inconsistency reduces battery pack lifetimes and increases their usage costs. Active balancing... Skip to Article Content; Skip to Article Information; Search within. Search term. Advanced Search Citation Search. Search term. Advanced Search Citation Search. Login / Register . Individual login Institutional login REGISTER International Journal of Energy …
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Lithium-Ion Battery Pack Robust State of Charge Estimation, Cell ...
This paper presents the state of art of battery pack SOC estimation methods along with the impact of cell inconsistency on pack performance and SOC estimation. Cell balancing methods, which are necessary due to cell inconsistencies, are discussed as well. Four categories of pack SOC estimation methods are presented, including individual cell ...
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Lithium-Ion Battery Pack Robust State of Charge …
This paper presents the state of art of battery pack SOC estimation methods along with the impact of cell inconsistency on pack performance and SOC estimation. Cell balancing methods,...
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A novel battery pack inconsistency model and influence degree …
Two groups of battery packs with different inconsistency parameter characteristics are designed based on the battery pack inconsistency quantification …
Learn More
Propagation mechanisms and diagnosis of parameter inconsistency within ...
Li-ion battery pack inconsistency diagnosis depends mainly on extracting a set of features that can evaluate inconsistency and distinguish its causes. Diagnostic methods for assessing parameter inconsistency can be roughly classified as threshold-based, artificial intelligence-based, and clustering-based approaches. Such a taxonomy ...
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Influence of equalization on LiFePO4 battery …
Capacity inconsistency among cells is a serious problem in battery energy storage systems. The inconsistency reduces battery pack lifetimes and increases their usage costs. Active balancing is an effective technique for …
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Balancing Topology Research of Lithium-Ion Battery Pack
The battery balancing system is based on energy, which is mainly to form energy conduction between high-power batteries and low-power batteries, so as to improve the consistency of battery packs . Battery pack balancing can be divided into two categories, passive balancing and active balancing. Passive balancing is energy consumption balancing, and …
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Influence of equalization on LiFePO4 battery inconsistency
Capacity inconsistency among cells is a serious problem in battery energy storage systems. The inconsistency reduces battery pack lifetimes and increases their usage costs. Active balancing is an effective technique for performance equalization between cells. Here, a quantitative analysis method based on an active balancing circuit ...
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Performance of inconsistency in lithium-ion battery packs for …
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 …
Learn More
Integrated Framework for Battery Cell State-of-Health Estimation …
2 · A switchable indicator for active balance of the lithium-ion battery pack using a bypass equalizer. Journal of Energy Storage, 68 (2023), Article 107696, 10.1016/j.est.2023.107696. View PDF View article View in Scopus Google Scholar [23] Miyatake S., Susuki Y., Hikihara T., Itoh S., Tanaka K. Discharge characteristics of multicell lithium-ion battery with nonuniform cells. J …
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Figure 3 from Lithium-Ion Battery Pack Robust State of Charge ...
FIGURE 3. Impact of 20% internal resistance mismatch on voltage sharing of 3 series connected cells during constant current charge. - "Lithium-Ion Battery Pack Robust State of Charge Estimation, Cell Inconsistency, and Balancing: Review"
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