e-Mobility

Research indicates electric vehicle battery can last a million miles

In a a recent article published in ‘Journal of The Electrochemical Society’, the outcome of the research indicates that the new battery cells under research shoud be able to power electric vehicle for over 1.6 million kilometres (a million miles) or at least two decades in grid energy storage.

The researchers from Dalhousie University, Halifax, mentions in the abstract of paper- “We present a wide range of testing results on an excellent moderate-energy-density lithium-ion pouch cell chemistry to serve as benchmarks for academics and companies developing advanced lithium-ion and other “beyond lithium-ion” cell chemistries to (hopefully) exceed. These results are far superior to those that have been used by researchers modelling cell failure mechanisms and as such, these results are more representative of modern Li-ion cells and should be adopted by modellers. Up to three years of testing has been completed for some of the tests. Tests include long-term charge-discharge cycling at 20, 40 and 55°C, long-term storage at 20, 40 and 55°C, and high precision coulometry at 40°C. Several different electrolytes are considered in this LiNi0.5Mn0.3Co0.2O2/graphite chemistry, including those that can promote fast charging. The reasons for cell performance degradation and impedance growth are examined using several methods.”

The electric vehicles like those from Tesla, running on road have a battery life of 300,000 to 5,00,000 miles. The new battery could double its life, without losing even 10% of its energy capacity to the extent it may outlive the electric vehicle itself. Since 2016, the researchers at The Dalhousie University has been conducting research exclusively for Tesla on improving lithium-ion batteries.

The researchers, according to ‘Wired’ have not skimped on details and they do not herald this result as breakthrough, rather they present ti as a benchmark for other battery researchers.

According to ‘Gizmodo‘- ‘just days after this paper was published, Tesla was awarded a patent for a new electric vehicle battery featuring nearly the exact same chemical makeup as the ones detailed in the research paper. One of the inventors listed in the new patent was physicist Jeff Dahn, who just so happens to lead Dalhousie University’s battery lab.’

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