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Analysis of Ageing Effect on Li-Polymer Batteries.

Barcellona S, Brenna M, Foiadelli F, Longo M, Piegari L - ScientificWorldJournal (2015)

Bottom Line: These cycles are identical, which is not the case for electric vehicles applications.In this way, a generic complex cycle can be seen as a composition of elemental cycles by means of Rainflow procedures.Consequently, the ageing due to any cycle can be estimated starting from the knowledge of simpler cycles.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milano, Italy.

ABSTRACT
Lithium-ion batteries are a key technology for current and future energy storage in mobile and stationary application. In particular, they play an important role in the electrification of mobility and therefore the battery lifetime prediction is a fundamental aspect for successful market introduction. Numerous studies developed ageing models capable of predicting battery life span. Most of the previous works compared the effect of the ageing factors to a battery's cycle life. These cycles are identical, which is not the case for electric vehicles applications. Indeed, most of the available information is based on results from laboratory testing, under very controlled environments, and using ageing protocols, which may not correctly reflect the actual utilization. For this reason, it is important to link the effect of duty cycles with the ageing of the batteries. This paper proposes a simple method to investigate the effect of the duty cycle on the batteries lifetime through tests performed on different cells for different kinds of cycle. In this way, a generic complex cycle can be seen as a composition of elemental cycles by means of Rainflow procedures. Consequently, the ageing due to any cycle can be estimated starting from the knowledge of simpler cycles.

No MeSH data available.


Related in: MedlinePlus

Ageing of the three cells as function of the cycles.
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Related In: Results  -  Collection


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fig3: Ageing of the three cells as function of the cycles.

Mentions: The three cells are, of course, different from one another. In order to compare their ageing, a preliminary measurement of their capacity has been performed and this value has been considered as reference value for evaluating the ageing. In particular, the initial measured capacity of the three cells is (1)C1=10.191 Ah,C2=10.290 Ah,C3=10.268 Ah.The following capacity reductions will be calculated per unit using the bases reported in (1). In Figure 3, the capacity reductions (blue line) of the three cells during the 600 cycles are reported.


Analysis of Ageing Effect on Li-Polymer Batteries.

Barcellona S, Brenna M, Foiadelli F, Longo M, Piegari L - ScientificWorldJournal (2015)

Ageing of the three cells as function of the cycles.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4506813&req=5

fig3: Ageing of the three cells as function of the cycles.
Mentions: The three cells are, of course, different from one another. In order to compare their ageing, a preliminary measurement of their capacity has been performed and this value has been considered as reference value for evaluating the ageing. In particular, the initial measured capacity of the three cells is (1)C1=10.191 Ah,C2=10.290 Ah,C3=10.268 Ah.The following capacity reductions will be calculated per unit using the bases reported in (1). In Figure 3, the capacity reductions (blue line) of the three cells during the 600 cycles are reported.

Bottom Line: These cycles are identical, which is not the case for electric vehicles applications.In this way, a generic complex cycle can be seen as a composition of elemental cycles by means of Rainflow procedures.Consequently, the ageing due to any cycle can be estimated starting from the knowledge of simpler cycles.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milano, Italy.

ABSTRACT
Lithium-ion batteries are a key technology for current and future energy storage in mobile and stationary application. In particular, they play an important role in the electrification of mobility and therefore the battery lifetime prediction is a fundamental aspect for successful market introduction. Numerous studies developed ageing models capable of predicting battery life span. Most of the previous works compared the effect of the ageing factors to a battery's cycle life. These cycles are identical, which is not the case for electric vehicles applications. Indeed, most of the available information is based on results from laboratory testing, under very controlled environments, and using ageing protocols, which may not correctly reflect the actual utilization. For this reason, it is important to link the effect of duty cycles with the ageing of the batteries. This paper proposes a simple method to investigate the effect of the duty cycle on the batteries lifetime through tests performed on different cells for different kinds of cycle. In this way, a generic complex cycle can be seen as a composition of elemental cycles by means of Rainflow procedures. Consequently, the ageing due to any cycle can be estimated starting from the knowledge of simpler cycles.

No MeSH data available.


Related in: MedlinePlus