(Press release: Krefeld, April 4, 2019) – The innovative battery system by E-Stream Energy GmbH & Co. KG has passed two rapid charging tests at TÜV Rheinland LGA Products GmbH. Fast charging times and low temperatures were determined. The lithium-ion battery module passed the charging tests without any limitations on charging performance, although it does not have its own active cooling system.
The first rapid charge test was carried out at a current of 250 A. The module charged from 0 to 80% in less than 24 minutes. It took about 36 minutes for a full charge. The second rapid charge test was carried out at a current of 300 A. The module recharged from 20 to 80% in only 15 minutes. For a charge from 20 to 100% it took about 28 minutes. Temperatures inside the module rose to 53.8°C (250A) and 51.1°C (300A), respectively, during the quick charge test. This means that all the limits defined by E-Stream Energy for charging times and temperatures have been clearly undercut.
For the first quick charge test at 250 A, time limits of 25 minutes (0 to 80%) or 38 minutes (0 to 100%) applied. The second quick charge test at 300 A also had time limits of 25 minutes (20 to 80%) and 38 minutes (20 to 100%). The upper temperature limits were 60°C according to the specifications of the battery cell manufacturer.
Thomas Krämer, Managing Director of E-Stream Energy: “The results of the rapid charging tests at TÜV Rheinland show that our innovative battery system can be charged within a very short time without overheating. The charging times measured in the second test and the maximum temperatures determined in both tests were even well below our limits.”
The innovative battery system by E-Stream Energy features intelligent thermal management. This is made possible through the combination of the modular design of the battery module (“packaging”) with a special type of cell interconnection developed by E-Stream.
The rapid loading tests were carried out in the laboratory of TÜV Rheinland LGA Products GmbH in Staufenberg between 21 and 22 March 2019.