INFLUENCE OF TEMPERATURE VARIATION OVER CHARACTERISTIC CAPACITY IN 18650 LI-ION RECHARGEABLE BATTERY

Temperature variation it is known to have an important impact on the safety, cycle lifetime and performances of lithium-ion battery. This paper deals with an 18650 type Li-ion rechargeable battery, which was charged/discharged with a specific rate of 0.2A into a range of temperature between 2-52°C....

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Bibliographic Details
Published inSmart Energy and Sustainable Environment Vol. 19; no. 2; p. 73
Main Authors Bubulinca, Constantin, Enache, Stanica, Buga, Mihaela Ramona
Format Journal Article
LanguageEnglish
Published Ramnicu Valcea National Research-Development Institute for Cryogenic and Isotopic Technologies 01.01.2016
Subjects
Anodizing
Batteries
Charging
Discharge
Efficiency
Electrolytes
Enlargement
Ethylene
Laboratories
Lithium
Oxidation
Passivity
Product safety
Rechargeable batteries
Solvents
Surface layers
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Summary:Temperature variation it is known to have an important impact on the safety, cycle lifetime and performances of lithium-ion battery. This paper deals with an 18650 type Li-ion rechargeable battery, which was charged/discharged with a specific rate of 0.2A into a range of temperature between 2-52°C. Tested cell was fabricated in research laboratory of ROM-EST. To reach the goal has been used Fuelcon B Evaluator battery testing system equipped with a thermal chamber which allow variation of temperature into a range -30 to 80°C. Battery testing unit, is a scalable system with 8 optional enlargement channels. The charge/ discharge current can be chose between 10 mA and 100A. Tendency of specific charging capacity is to decrease when temperature grow or drops compare with room temperature, reaching a maximum value at 32°C (82 mAhg-1) and a minimum at 2°C, where charging capacity was 72 mAhg-1. Discharge capacity respect the same tendency, reaching a maximum value at 32°C mAh (80 mAhg-1) and a minimum at 2°C, where discharging capacity was 70 mAhg-1. The increasing of degradation capacity rate at elevated temperatures is due surface layer passivation by anodic oxidation of electrolyte and co-solvents decomposition. (e.i. ethylene carbonate).
ISSN:2668-957X
2668-957X