Comparison of Different Battery Balancing Methods for use with Second Life Batteries

Yang, Jingxi; Strickland, Dani; Varnosfaderani, Mina Abedi

doi:10.1109/icrera49962.2020.9242912

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…The second step in the complete characterisation test is an impedance measurement. Impedance is measured using a time-domain approach, with current pulses at different states of charge (10,20,30,40,50,60,70, 80 and 90%) and current regimes (0.3 C, 0.5 C, 0.8 C, 1 C and 1.3 C). Three types of current pulses are used.…”

Section: Experimental Characterisation Of the Second-life Modulementioning

confidence: 99%

“…This graph shows that the range of states of charge accessible when operating at constant current is limited between a 20% and 85% state of charge due to the degraded cells. In order to minimise the effect of these elements, current reduction and the use of balancing are two methods that can be implemented [59,60]. The module efficiency can also be used to estimate energy losses.…”

Section: Efficiency and Energy Lossesmentioning

confidence: 99%

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Battery Passports for Second-Life Batteries: An Experimental Assessment of Suitability for Mobile Applications

Hassini,

Redondo-Iglesias,

Venet

2024

Batteries

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End-of-life electric vehicle (EV) batteries can be reused to reduce their environmental impact and economic costs. However, the growth of the second-life market is limited by the lack of information on the characteristics and performance of these batteries. As the volume of end-of-life EVs may exceed the amount of batteries needed for stationary applications, investigating the possibility of repurposing them in mobile applications is also necessary. This article presents an experimental test that can be used to collect the data necessary to fill a battery passport. The proposed procedure can facilitate the decision-making process regarding the suitability of a battery for reuse at the end of its first life. Once the battery passport has been completed, the performance and characteristics of the battery are compared with the requirements of several mobile applications. Mobile charging stations and forklift trucks were identified as relevant applications for the reuse of high-capacity prismatic cells. Finally, a definition of the state of health (SoH) is proposed to track the suitability of the battery during use in the second-life application considering not only the energy but also the power and efficiency of the battery. This SoH shows that even taking into account accelerated ageing data, a repurposed battery can have an extended life of 11 years at 25 °C. It has also been shown that energy fade is the most limiting performance factor for the lifetime and that cell-to-cell variation should be tracked as it has been shown to have a significant impact on the battery life.

show abstract

Section: Experimental Characterisation Of the Second-life Modulementioning

confidence: 99%

Section: Efficiency and Energy Lossesmentioning

confidence: 99%

Battery Passports for Second-Life Batteries: An Experimental Assessment of Suitability for Mobile Applications

Hassini,

Redondo-Iglesias,

Venet

2024

Batteries

View full text Add to dashboard Cite

show abstract

“…This graph shows that the range of states of charge accessible when operating at constant current is limited between 20 % and 85 % state of charge due to the degraded cells. In order to minimise the effect of these elements, current reduction and the use of balancing are two methods that can be implemented [59,60]. The module efficiency can also be used to estimate energy losses.…”

Section: Efficiency and Energy Lossesmentioning

confidence: 99%

Battery Passport for Second-Life Batteries: Experimental Assessment of Suitability for Mobile Applications

Hassini,

Redondo-Iglesias,

Venet

2024

Preprint

View full text Add to dashboard Cite

End-of-life electric vehicle (EV) batteries can be reused to reduce their environmental impact and economic costs. However, the growth of a second-life market is limited by the lack of information on the characteristics and performance of these batteries. As the volume of end-of-life EVs may exceed the amount of batteries needed for stationary applications, investigating the possibility of repurposing them in mobile applications is also necessary. This article presents an experimental test that can be used to collect the data necessary to fill a battery passport. The proposed procedure can facilitate the decision making process regarding the suitability of a battery for reuse at the end of its first life. Once the battery passport has been completed, the performance and characteristics of the battery are compared with the requirements of several mobile applications. Mobile charging stations and forklift trucks were identified as relevant applications for the reuse of high capacity prismatic cells. Finally, a definition of a state of health (SoH) is proposed to track the suitability of the battery during use in the second life application considering not only energy but also power and efficiency of the battery. This SoH shows that even taking into account accelerated ageing data, a repurposed battery can have an extended life of 11 years at 25~°C. It has also been shown that energy fade is the most limiting performance for lifetime and that cell-to-cell variation should be tracked as it has been shown to have a significant impact on battery life.

show abstract

Comparison of Different Battery Balancing Methods for use with Second Life Batteries

Cited by 2 publications

References 12 publications

Battery Passports for Second-Life Batteries: An Experimental Assessment of Suitability for Mobile Applications

Battery Passports for Second-Life Batteries: An Experimental Assessment of Suitability for Mobile Applications

Battery Passport for Second-Life Batteries: Experimental Assessment of Suitability for Mobile Applications

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