Theoretical model of lithium iron phosphate power battery under high‐rate discharging for electromagnetic launch

Carbon-coated, bismuth-doped, lithium iron phosphates, LiFe1xBixPO4(0x0.05), have been synthesized by a solid-state reaction method. From the optimization, the carbon-coated LiFe0.95Bi0.05PO4phase showed superior performances in terms of phase purity and high discharge capacity. The structural, morphological, and electrochemical properties were studied and compared to carbon-coated, LiFePO4. The Li/LiFe0.95Bi0.05PO4with carbon coating cell delivered an initial discharge capacity of 145 mAh/g and was 30 mAh/g higher than the Li/LiFePO4with carbon coating cell. Cyclic voltammetry revealed excellent reversibility of the LiFe0.95Bi0.05PO4with carbon coating material. High rate capability studies were also performed and showed a capacity retention over 93% during the cycling. It was concluded that substituted Bi ion play an important role in enhancing battery performance of the LiFePO4material through improving the kinetics of the lithium insertion/extraction reaction on the electrode.

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High Rate Capability Lithium Iron Phosphate Wired by Carbon Nanotubes and Galvanostatic Transformed to Graphitic Carbon

Journal of The Electrochemical Society ◽

10.1149/2.015204jes ◽

2012 ◽

Vol 159 (4) ◽

pp. A336-A341 ◽

Cited By ~ 11

Author(s):

M. Gnanavel ◽

Manu U. M. Patel ◽

A. K. Sood ◽

Aninda J. Bhattacharyya

Keyword(s):

Carbon Nanotubes ◽

Lithium Iron Phosphate ◽

Rate Capability ◽

Iron Phosphate ◽

Graphitic Carbon ◽

High Rate ◽

High Rate Capability

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Study of Electric Vehicle Lithium Batteries

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.494-495.238 ◽

2014 ◽

Vol 494-495 ◽

pp. 238-241

Author(s):

Zhe Ci Tang ◽

Chun Lin Guo

Keyword(s):

Electric Vehicle ◽

Lithium Iron Phosphate ◽

Experimental Tests ◽

Iron Phosphate ◽

Performance Model ◽

Advantages And Disadvantages ◽

Electric Vehicle Charging ◽

Power Battery ◽

Electric Vehicle Battery ◽

Discharge Method

Electric vehicle power battery is one of the key technologies for electric vehicle charging and discharging. This paper summarized the characteristics of lithium iron phosphate battery firstly, then adopted intermittent discharge method to get the battery OCV-SOC curve under experimental tests, determined the parameters of OCV-SOC models, analyzed the advantages and disadvantages of commonly used cell performance model, finally built electric vehicle battery charging model.

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Methods of synthesis and performance improvement of lithium iron phosphate for high rate Li-ion batteries: A review

Engineering Science and Technology an International Journal ◽

10.1016/j.jestch.2015.06.002 ◽

2016 ◽

Vol 19 (1) ◽

pp. 178-188 ◽

Cited By ~ 37

Author(s):

T.V.S.L. Satyavani ◽

A. Srinivas Kumar ◽

P.S.V. Subba Rao

Keyword(s):

Performance Improvement ◽

Lithium Iron Phosphate ◽

Iron Phosphate ◽

High Rate ◽

Li Ion Batteries ◽

Methods Of Synthesis ◽

Li Ion ◽

And Performance

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Improved Method for State of Charge Estimation of Lithium Iron Phosphate Power Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.1956 ◽

2013 ◽

Vol 712-715 ◽

pp. 1956-1959 ◽

Cited By ~ 3

Author(s):

Ming Li ◽

Yang Jiang ◽

Jian Zhong Zheng ◽

Xiao Xiao Peng

Keyword(s):

Lithium Iron Phosphate ◽

Estimation Method ◽

Iron Phosphate ◽

Open Circuit ◽

State Of Charge ◽

Counting Method ◽

Initial State ◽

Soc Estimation ◽

Power Battery ◽

Environment Temperature

To resolve the problems that the initial state of charge (SOC) and the available capacity of batteries are difficult to estimate when using the Ah counting method, in this paper An improved SOC estimation method was proposed that combined with the open circuit voltage (OCV) method and Ah counting method based on the analysis and consideration of the battery available capacity variation caused by charge and discharge current, environment temperature and battery state of health (SOH). The precision of the proposed method was validated by using Federal Urban Driving Schedule (FUDS) test of a Lithium iron phosphate (LiFePO4) power battery. The SOC estimate error using the proposed method relative to a discharge test was better than the Ah counting method.

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