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Nokia BL-4C 950mAh Li-ion Battery

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Colclasure, A. M. et al. Electrode scale and electrolyte transport effects on extreme fast charging of lithium-ion cells. Electrochim. Acta 337, 135854 (2020). The transition to electric vehicles (EVs) is seen as an important means to reduce global carbon emissions from the transport sector, but a number of barriers to mass adoption of EVs have been identified. Technical concerns such as battery range, charging time, and battery life are prominent among these, particularly for battery-only EVs as compared to hybrids (Biresselioglu, Kaplan, and Yilmaz 2018). Increased battery sizes increase the range of EVs and the provision of rapid charging infrastructure reduces charging time, but we ask what effect these have on the third concern of EV battery life? There is a phenomenon known as ‘Voltage Sag’– The higher your throttle input, the faster you deplete your battery, but this depletion is not linear. At very high throttle the voltage drops even faster, but as you decrease throttle, the voltage will recover, the lower the C rating of your battery the more pronounced the voltage sag will be, and the longer it will take for the voltage to increase again.

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