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Following concerns about slower charging speeds at Superchargers, Tesla acknowledged that it is intentionally limiting charge rates for vehicles that frequently rely on DC fast chargers. Insights from a report by Electrek shed light on this issue.
Tesla stated to the electric vehicle blog that a Supercharger may reduce charging speeds if it detects that the battery pack’s condition has deteriorated due to repeated use of DC fast charging.
Here’s a portion of Tesla’s explanation:
“The maximum charging rate achievable in a lithium-ion cell tends to decrease after a significant number of high-rate charging sessions. This decline results from physical and chemical changes within the cells. Our fast-charge control technology is designed to ensure battery safety and to maintain the highest possible cell capacity (range capability) under all conditions. To guarantee safety and optimize range, we must reduce charging speeds when the cells are too cold, when the battery is nearing full charge, and as the cells naturally age and adapt to usage. This aging and usage effect can add roughly 5 minutes to total Supercharging time, but under 1% of our customers encounter this issue.
Tesla is not limiting charge rates to deter frequent Supercharging; in fact, we encourage our customers to utilize the Supercharger network as needed, and we are committed to doubling the global number of chargers this year. Our goal is to enhance our customers’ experience at Superchargers while maximizing vehicle range, even after repeated use.”
Tesla via Electrek
As reported by Electrek, the particular Tesla vehicle that sparked the discussion has experienced an unusually high amount of fast charger usage. Whereas most users typically charge their vehicles at home, this specific car has primarily relied on fast chargers for its energy needs.
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