Lighter 22.92-kwh Battery Developed By The SmartBatt Project

The development of cost-effective, lightweight, high energy density and safe battery technologies is widely considered to be a crucial enabler for the successful and widespread take-up of pure battery-electric vehicles.

To address this challenge, the SmartBatt project – a collaboration between nine research partners from five European countries – is working to develop battery pack design and optimization processes capable of delivering a 20 kwh, 200-400 volt pack with a 15 percent reduction in weight compared with current state-of-the-art systems, while delivering a continuous power rating of 36 kw, and a peak performance of 70 kw for up to 30 seconds.

The consortium said the battery pack delivered by the project exceeds the capacity target by in excess of 10 percent, providing a total of 22.92 kwh of energy storage.

At the European Electric Vehicle Congress in Brussels – as a part of the European project day program – a presentation described work carried out by Ricardo within SmartBatt to develop design processes that will deliver an optimized battery pack to meet the project’s exacting specification.

In addition to its functional requirements and weight reduction target, the team was responsible for the design and assessment of a battery pack offering a range of 120 km based on NEDC operation.

The process considered cell selection based on the particular attributes of the target vehicle – assumed to be the size of a VW Golf – and was intended to deliver a solution capable of vehicle integration in a crash-safe manner. The electrical architecture was based on the Ricardo universal battery management system, providing integrated fault detection and charge optimization functionality.

“We were pleased to have been able to participate in the SmartBatt project and to have thoroughly explored many new and innovative approaches to the design and optimization of electric vehicle battery pack systems,” said Dave Greenwood, head of the Ricardo hybrid and electric systems product group. “Through the work presented today, we have been able to demonstrate that a highly optimized pack design, fully integrated with vehicle requirements, is possible using a rigorous flow-down technique based on the application of advanced design software. This work has provided crucial enabling lightweight technology for the next-generation more efficient and functionally attractive electric vehicles.”

A prototype of the battery pack designed by the project is currently on display at the European Electric Vehicle Congress which ends today, Thursday Nov. 22.

The SmartBatt project participants are AIT Austrian Institute of Technology GmbH, Axeon Technologies Ltd, Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung, Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF, Impact Design Europe, Ricardo plc, SP Technical Research Institute of Sweden, the Vehicle Safety Institute of Graz University of Technology, and Volkswagen Aktiengesellschaft.

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  • Van

    23 Kwh seems quite large for a plug in hybrid, we only need about half of that. 23 Kwh seems quite small for an EV, we need twice that and more. Research should focus on 12 Kwh and 48 kwh batteries.

    Not sure what “offering a range of 120 km based on NEDC operation” means in the real world. Figure 3.5 MPkwh, so if 80% of the 23 was available routinely, then the range of the prototype would be 64 miles, way to short. A minimum range for an Ev would be 135 real world miles, which works out to 48 kwh battery.