A key goal of CBI’s Technical Roadmap to improve the DCA of lead batteries, a technical parameter highly relevant for the automotive industry which encompasses lower emission vehicles such as start-stop, micro-hybrids and electric vehicles.
The CBI-funded project "Best practice of cell testing for EFB regarding DCA and high-temperature durability" delivers a significant improvement of DCA while also delivering uncompromised water consumption and improved corrosion durability.
With project partners from across the European value chain – universities TU Berlin and Fraunhofer ISC, car company Ford and battery manufacturer Moll in– this project encompasses the diverse players involved in Europe’s innovative lead battery industry.
As the automotive industry continues to move towards decarbonisation and electrification, new functions are required to increase safety and comfort. “These trends impose growing demands on the energy storage devices used within automobiles. In order to take advantage of these opportunities and defend against competition from other technologies, the lead battery must continue to adapt and improve”, explains Sophia Bauknecht from TU Berlin.
This project in particular is essential for the growing start-stop and micro-hybrid market as “Dynamic Charge Acceptance (DCA) and water loss are critical factors for the efficiency and lifetime of start-stop batteries, and they need to be improved to stay competitive with other battery technologies”, says Prof. Dr Julia Kowal from TU Berlin.
“Changes in the material synthesis and preparation are needed for cost-efficient and faster material developments. Especially if it works to measure the DCA from a simple measurement of a reduced size cell, improvement of DCA can become much faster because only small cells are needed for material screening and then only the promising materials need to be scaled up to complete batteries”, she continued.
Lead batteries are a vital part of automotive applications, including SLI, start-stop and micro-hybrid applications. As the industry shifts towards electrification, this technology will continue to evolve and adapt in order to provide better safety and security features through secondary low-voltage EV batteries, EFB and AGM batteries.
Pre-competitive research projects underway through CBI’s Technical Program, like this one, not only help CBI to develop better practices for the industry, but also strengthen the collaborative work between automotive manufacturers and battery application specialists to continue the innovation push driven by CBI.
Watch Part II video of CBI's visit to TU Berlin
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