This decline in price was expected to continue in 2022 but has been impacted by conflict, inflation and market conditions. The cost of battery packs has decreased by 88% in the last 10 years according to Forbes. Power degradation, or loss of performance in delivering power to the powertrain is rarely observable in EVs, but the recharging performance or efficiency may degrade. Many dealers have a warranty of 8 years or160,000km on their batteries which shows the decline in the battery will take years to happen. It is inevitable that the SoH of any Li-ion battery will gradually decline with use (charging/discharging cycles) resulting in reduced charge capacity and therefore reduced range. Some Consumer Reports in the US estimate the average EV battery pack's lifespan to be at around 320,000 Kms, which is nearly 19.5 years of use if driven at the Irish average per car 16,400 Km per year (CSO 2019), longer than the expected lifespan of most vehicles (which is 10-14 years)! Read on to see why Irish EV battery packs may fair even better due to the Irish climate!ĮV batteries are more robust than those used in other mobile technologies and with their battery management systems they are unlikely to catastrophically fail. There are reports online of EVs passing the 1,000,000km mark on the same battery! Tesla Model S or X offer battery failure warranty of 8 years, or up to 240,000km, whichever comes first. So, while electro chemists work on increasing battery capacity, what do we know about the expected lifespan of a Li-ion battery pack? What is the story with battery degradation (declining SoH), and what can EV owners do to minimise it?Įlectric car batteries are being built to have a long lifespan, with most manufacturers guaranteeing 8 years or 160,000km (SoH of batteries >70-80%). The car industry challenge is to have a cost-effective, efficient battery to meet the needs of EV drivers who want longer range and faster charging. This is no different from the performance of an ICE vehicle, but that’s a whole other blog!Īlthough the SoH of PHEVs batteries will also be impacted by the same variables as BEVs, the all-electric range for PHEVs is a more complex given both fuel types are often used simultaneously. Every model has a different battery size and efficiency, and therefore a different range.Īs is the case for ICE vehicles, with fuel tanks of different sizes and mpg, EVs vary widely on the distance they can travel on a fully charged battery. Other variables that have an impact on real world electric range of a BEV or PHEV include driver behaviour (specifically speed, as with ICE vehicles the faster you go the less the range), driving conditions, topography, passenger load, auxiliary use and climate. The vehicles range is how far a vehicle can travel on a full charge, this is typically in proportion to the capacity of the battery. The total energy or capacity of an EV battery pack is measured in kWh (kilowatt-hours).
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