T.D. HUND D. INGERSOLL, "Selected Test Results From The LiFeBatt Iron Phosphate Li-ion Battery", SANDIA REPORT, SAND2008-5583, September 2008, 34 pages.

T.D. HUND D. INGERSOLL, "Selected Test Results From The LiFeBatt Iron Phosphate Li-ion Battery", SANDIA REPORT, SAND2008-5583, September 2008, 34 pages. Copyright - [Précédente] [Première page] [Suivante] - Home

Article : [PAP636]

Titre : T.D. HUND D. INGERSOLL, Selected Test Results From The LiFeBatt Iron Phosphate Li-ion Battery, SANDIA REPORT, SAND2008-5583, September 2008, 34 pages.

Cité dans : [DIV542]  Recherche sur les BATTERIES LITHIUM, novembre 2017.

Auteur : Thomas D. Hund
Auteur : David Ingersoll

Prepared_by : Sandia National Laboratories - Albuquerque, New Mexico 87185 and Livermore, California 94550
Source : http://www.lifebatt.com/sandiareport.pdf
Site : http://www.lifebatt.com/
Numéro : SAND2008-5583
Date : September 2008
Lien : SAND2008-5583.pdf - 34 pages, 2321 Ko.

Vers : CONTENTS
Vers : Bibliographie

Abstract :
In this paper the performance of the LiFeBatt Li-ion cell was measured using a number of tests including capacity measurements, capacity as a function of temperature, ohmic resistance, spectral impedance, high power partial state of charge (PSOC) pulsed cycling, pulse power measurements, and an over-charge/voltage abuse test.
The goal of this work was to evaluate the performance of the iron phosphate Liion battery technology for utility applications requiring frequent charges and discharges, such as voltage support, frequency regulation, and wind farm energy smoothing.
Test results have indicated that the LiFeBatt battery technology can function up to a 10C1 discharge rate with minimal energy loss compared to the 1 h discharge rate (1C).
The utility PSOC cycle test at up to the 4C1 pulse rate completed 8,394 PSOC pulsed cycles with a gradual loss in capacity of 10 to 15% depending on how the capacity loss is calculated.
The majority of the capacity loss occurred during the initial 2,000 cycles, so it is projected that the LiFeBatt should PSOC cycle well beyond 8,394 cycles with less than 20% capacity loss.
The DC ohmic resistance and AC spectral impedance measurements also indicate that there were only very small changes after cycling.
Finally, at a 1C charge rate, the over charge/voltage abuse test resulted in the cell venting electrolyte at 110 °C after 30 minutes and then opencircuiting at 120 °C with no sparks, fire, or voltage across the cell.

Iron Phosphate Li-ion Battery. 3
Acknowledgments 4
Contents . 5
Figures 5
Nomenclature. 7
1. Introduction. 9
2. Test procedures 11
2.1 Capacity Test 11
2.2 DC Ohmic Resistance. 11
2.3 AC Spectral Impedance 12
2.4 Cell Power Density And Specific Energy. 12
2.5 Cell Capacity And Recharge As A Function Of Temperature . 13
2.6 Utility PSOC Pulsed Cycle Test . 13
2.7 Hybrid Pulse Power Test 15
2.8 Over Voltage/Charge Abuse Test . 17
3. Test Results. 18
3.1 Initial and Final Capacity 18
3.2 DC Ohmic Resistance. 18
3.3 AC Spectral Impedance 19
3.4 Cell Power and Specific Energy Density 20
3.5 Cell Capacity and Recharge as a Function of Temperature 22
3.6 Hybrid Pulse Power Test 23
3.7 Utility PSOC Pulse Cycle-Life Test . 25
3.8 Over Voltage/Charge Abuse Test . 26
4. Summary 29
5. References. 31
Distribution 33

Bibliographie

REFERENCES : 2
[1] : Handbook Of Batteries, 3th edition, G. W. Linden, McGraw-Hill Handbooks 1995, ISBN 0-07-135978-8.
[2] : D. Zhang, et al, “Studies on capacity fade of lithium-ion batteries,” Journal of Power Sources, 91, (2000), pp. 122-129.

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