(Press release: Krefeld, April 5, 2019) – The innovative battery system by E-Stream Energy GmbH & Co. KG has passed two quick charge tests at TechnoLab 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. A full charge took about 37 minutes. 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. The charge from 20 to 100% took about 28 minutes. Temperatures inside the module rose to 53.2°C (250A) and 51.0°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. For the second quick charge test at 300 A, time limits of 16 minutes (20 to 80%) or 30 minutes (20 to 100%) applied. 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 test results of TechnoLab are almost identical to the positive test results of TÜV Rheinland. The measured charging times are basically the same, and the maximum temperatures were again well below our limit. This proves once again that our innovative battery system can be recharged quickly and without the risk of overheating”.
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 TechnoLab GmbH in Berlin from 19 to 20 March 2019.