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FP7

BATTERIES2020 Result In Brief

Project ID: 608936
Funded under: FP7-NMP
Country: Spain

Low-cost lithium-ion batteries for electric vehicles

The high cost of batteries poses a major barrier to wider adoption of electric cars. An EU-funded project took several steps to increase lifetime and energy density of lithium-ion batteries, while also enhancing safety, cost and performance.
Low-cost lithium-ion batteries for electric vehicles
Electric vehicles play an important role in EU plans to reduce emissions of greenhouse gases and air pollutants from road transport. To become more competitive, manufacturing costs of lithium-ion batteries for electric cars and the cost per kilowatt-hours need to be drastically reduced.

The EU-funded project BATTERIES2020 (BATTERIES2020: Towards realistic European competitive automotive batteries) pointed to three approaches for increasing performance and lifetime, and reducing total cost of ownership of batteries. Researchers’ focus was on developing high-performance durable cells, reliable lifetime prediction tools, as well as further understanding battery ageing and degradation phenomena.

Researchers used improved cathode materials based on nickel/manganese/cobalt oxides that offer a good compromise between safety, cost and performance. Automotive cells based on this material can reach energy densities in the range of 160 to 180 Wh/kg BoL (beginning of life) and are able to perform over 3 000 cycles at 80 % depth of discharge (DOD). Special emphasis was also placed on the development of a roadmap based on materials with a fair chance for commercialisation.

Thorough understanding of ageing phenomena and degradation mechanisms can help to identify critical parameters, which affect battery lifetime performance. Combining accelerated tests, real field data, post-mortem analysis, modelling and validation, researchers took a more informed decision on electrode materials selection. In addition to using materials with high energy density, the team modified additives, components, and interfaces, which had all been identified as major causes of degradation.

Battery cost needs to be reduced by at least 50 % for electric vehicles to be cost competitive against conventional vehicles. Researchers identified a promising route to potentially reducing the total cost of ownership, by reusing them in second life applications, especially in the renewable energy field.

BATTERIES2020 aimed to facilitate the massive adoption of electric vehicles in Europe by overcoming the main issues related to lithium-ion batteries, namely their cost. Project approaches will boost electric car use for urban mobility by providing long-range high-power and longer-life batteries. This should also facilitate the transition to a low-carbon European economy.

Related information

Keywords

Lithium-ion batteries, electric vehicles, BATTERIES2020, cost of ownership, ageing, degradation
Record Number: 200124 / Last updated on: 2017-06-28
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