EV batteries – TechStory

A groundbreaking study by P3 and Aviloo, analyzing data from over 7,000 electric vehicles (EVs), has revealed promising insights into the longevity of EV batteries. The research offers a real-world perspective on battery degradation, suggesting that EV batteries may last significantly longer than previously estimated when managed correctly. Initial Decline Followed by Stabilization The study highlights a critical trend: while EV batteries experience an initial decline in capacity, their performance stabilizes remarkably well over time. According to the findings, battery capacity drops to about 95% within the first 30,000 kilometers. This early decline, attributed to the formation of a solid electrolyte interphase (SEI) layer on the battery’s anode, is a natural part of the chemical setup during the initial charge cycles. However, the rate of degradation slows considerably after this phase. By the time an EV reaches 100,000 kilometers, the average battery capacity remains at around 90%. Even after 300,000 kilometers of use, most batteries retain about 87% of their original capacity. These figures surpass many original equipment manufacturers’ (OEMs) predictions, which often estimate battery health to drop to 70-80% over the same distance. Driving and Charging Habits Matter One of the study's most critical findings is the role of user behavior in battery longevity. Charging habits and driving styles significantly impact the state of health (SOH) of EV batteries. High-speed driving, rapid acceleration, and frequent use of high-power fast charging can accelerate battery degradation due to increased strain on the battery cells. Conversely, adopting moderate driving speeds and careful charging practices can slow down this degradation, preserving battery health for a longer time. For EV drivers and fleet managers, the message is clear: adopting gentle driving and charging practices benefits not only efficiency and safety but also extends the lifespan of the vehicle's battery. A Promising Future for EV Batteries The study’s findings have broader implications for the lifecycle of EV batteries. Most EV battery warranties currently cover eight years or 160,000 kilometers, with some extending to 10 years or 250,000 kilometers. Given the demonstrated durability, many batteries could far exceed these benchmarks, maintaining high performance well beyond their warranty periods. Additionally, this durability opens up opportunities for second-life applications. Once their performance in vehicles diminishes, batteries can be repurposed for stationary energy storage. This secondary use could extend their functional life to 20 years or more before recycling becomes necessary, contributing to sustainability and reducing waste. Real-World Insights for the EV Revolution By relying on real-life data rather than theoretical models, the P3 study paints an optimistic picture of EV battery longevity. It underscores the importance of proper battery management and reinforces the value of EVs as a long-term investment for both individuals and fleet operators. As the EV market grows and more consumers embrace electric mobility, these findings may help address concerns about battery life and replacement costs, making the transition to a greener future more accessible and appealing.

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January 7, 2025

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Tag: EV batteries

EV Batteries Prove More Durable Than Expected, Study Finds

BMW, Ford and Honda join forces to launch ChargeScape, an EV energy ecosystem

Mercedes battery partner breaks ground with lithium refinery facility

Elon Musk and BYD issued statements denying rift with battery supply deal

Ford to announce a new $3.5B battery plan in Michigan in partnership with CATL

Tata’s EV battery production could be in India and Europe

Toyota still not fully convinced about EVs being the only for sustainable transportation

Albemarle to invest millions in improving battery technology in EVs

US Energy to provide low-cost loan to GM and LG Energy joint venture

Ford to boost EV parts investments with an extra $180M

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