Discharging EV batteries in times of peak energy consumption can be damaging to the batteries. Image source: Shutterstock (#631877234)
According to a study conducted by a team at the Hawaii Natural Energy Institute, SOEST, University of Hawaii at Manoa, additional cycling to discharge vehicle batteries to the power grid in a vehicle-to-grid (V2G) scenario, even at constant power, is damaging to EV battery cell performance. A paper published in the Journal of Power sources reveals that the lifetime for vehicle use can be shortened up to five years with the use of these additional battery packs. Commercial Li-ion cells were used to investigate the impact of bidirectional charging on Panasonic 18650 NCA batteries.
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