A control strategy for dynamic balancing of lithium iron phosphate battery based on the performance of cell voltage
Abstract
Cell balancing is an important means to increase the capacity of the battery pack which consists of a series of cells, and to extend battery cycle life. Degree of inconsistency among cells is evaluated using capacity, charge and internal resistance. Different balancing criteria and implementations are analyzed on the conditions of battery energy storage system. Based on the cell voltage performance of the lithium iron phosphate battery, a novel control strategy for dynamic balance is proposed. The start-stop criterion of the balancer is adjusted as cell voltages changes with SOC and current. Simulation results on a cell-to-pack balance circuit show that the strategy for dynamic balance achieves SOC equilibrium among cells and solves the problems of frequent start-stop balancing and balancing current commutation, that are caused by the common strategy based on a fixed voltage threshold in the overall process.
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The polarization resistance is more affected by SOC than DC internal resistance.
“It can be seen from the figure that the polarization resistance is more affected by SOC than DC internal resistance [30,31].”
From The Influence of Temperature on the Capacity of Lithium Ion Batteries with Different Anodes (2021) · cites this paper as [30]
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The Influence of Temperature on the Capacity of Lithium Ion Batteries with Different Anodes
Lv, S., Wang, X., Lu, W., Zhang, J., & Ni, H. (2021) · Energies · doi:10.3390/en15010060 · Cited by 99 · see citing works
“It can be seen from the figure that the polarization resistance is more affected by SOC than DC internal resistance [30,31].”
Background
- Authors
- Qi, G., Li, X., & Yang, D.
- Affiliations
- Tsinghua University (CN)
- China Electric Power Research Institute (CN)
- Venue
- 2014 IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)
- Publisher
- IEEE
- Published
- 2014-08
- Pages
- 1-5
- OpenAlex
- W2329659083
- Cited by
- 13
- References
- 0
- Citations by year
- 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 1 · 2016: 3
- FWCI
- 1.29
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) (publishedVersion)
- Topics
- Physical Sciences › Engineering › Automotive Engineering › Advanced Battery Technologies Research
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
- Physical Sciences › Energy › Energy Engineering and Power Technology › Power Systems and Renewable Energy
- Keywords
- lithium iron phosphate batteries, battery balancing, battery energy storage
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