Community Research and Development Information Service - CORDIS

20 kWh all solid-state polymer battery

Large lithium ion batteries are expected to be one of the most powerful electric propulsion systems for electric cars. This project aimed to scale up existing battery technology to produce an all-solid-state, thin film lithium polymer modular battery of 20 kWh, with high energy density. Based on state-of-the-art materials available at the time of component manufacture, the main target performance objectives are 100 Wh/kg and 300 W/kg with a lifetime of 300 cycles, an operating temperature of between -20 and +60 C, and an operating cost of around 150 ECU/kWh.

Currently, lithium ion batteries are mostly used for portable applications, especially for cellular phones and portable computers. However, such batteries are thought to be ideal candidates for use in electric vehicles compared to other types of rechargeable battery systems (i.e. lead acid, sodium/sulphur, and nickel/cadmium), which all have specific drawbacks such as short lifetime, high operating temperatures, toxicity, and expense. A variety of prismatic and cylindrical batteries with different characteristics, and ranging in energy content up to 100 Wh, were produced under a previous JOULE project. The current project would redesign certain aspects of these batteries so that they are able to function in a larger modular arrangement.

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