Off-grid photovoltaic vehicle charge using second life lithium batteries: An experimental and numerical investigation

Shi Jie Tong, Adam Same, Mark A. Kootstra and Jae Wan Park

Applied Energy, 2013, vol. 104, issue C, 740-750

Abstract: Partially degraded lithium batteries from automotive applications, also known as second life batteries, are becoming more available for secondary applications due to the increasing market share of plug-in hybrid and electric vehicles. This study examines the feasibility of installing a second life battery pack in an off-grid photovoltaic vehicle charging system. The system was constructed using a photovoltaic array to charge a battery pack via a maximum power point tracking controller and later charge a vehicle via an inverter. The battery pack was configured using 135second life LiFePO4 based battery cells, selected based on remaining capacity, connected to form a nine parallel by 15 serial battery pack with accessible storage capacity of 13.9kWh. Experimental results show that the proposed second life battery system successfully achieves the desired function with a simple system structure and control methods. A numerical simulation was performed by constructing an equivalent system model, where the photovoltaic array and battery pack were modeled using equivalent circuit techniques. The model was parameterized and validated via testing of the system. Coupled with weather data, the model can simulate the system’s performance under different application scenarios. The numerical investigation reveals that the proposed system, using second life batteries, can achieve similar performance to systems using new lithium batteries, but at a reduced cost.

Keywords: Battery; Charging; PHEV; EV; Off-grid (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (37)

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DOI: 10.1016/j.apenergy.2012.11.046

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