One of the highest priority goals set out in CBI’s Technical Roadmap is improving DCA –Dynamic Charge Acceptance for automotive lead batteries.
It’s a key area of work that CBI works with universities, research institutes, battery companies and car manufacturers around the world to tackle.
At TU Berlin, an ongoing research project has identified that on a battery level “single-pulse test for DCA and continuous overcharging for water consumption bear only weak correlation with results obtained under field conditions, particularly when most advanced (high DCA) battery technologies are addressed”, says Sophia Baucknecht, Graduate Research Scientist from TU Berlin.
As part of the research team made up of TU Berlin, Fraunhofer ISC, Ford and Moll, Sophia’s research aims for a better alignment and co-operation between car makers and battery application specialists.
With what aim? To establish best practice cell-testing for EFB regarding DCA and high-temperature durability.
These two metrics are vital for the enhanced performance of automotive lead batteries used across the global vehicle fleet, such as start-stop and micro-hybrids.
The research is increasing the efficiency of lead batteries by “finding out if lab-cell tests of DCA and water loss can be scaled up to a complete battery”, explains Prof. Dr Julia Kowal from TU Berlin.
If there’s higher efficiency and better charge acceptance, “less energy is lost during charging and braking and so the fuel consumption is reduced”, she continues. This is a critical step for automotive battery innovation towards decarbonisation and electrification for more fuel-efficient cars with a lower carbon footprint.
Watch the first video on CBI's visit to TU Berlin:
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