Prolongued life of fast charged Li-ion battery systems

Important results from the project

** Denna text är maskinöversatt ** With the help of optimized thermal regulation, we have demonstrated reduced wear of the battery cells during ultra-fast charging by up to 600%. By being able to charge quickly without serious wear, you can keep the battery packs longer or in many cases manage with smaller battery packs, and the raw material needs can thus be kept down. We obtain very fast heating and cooling of all cells in a module. Temperature of cells is uniform, with a deviation below 3 degree while we keep energy density, production cost, charging speed and power at an extremely good level.

Expected long term effects

** Denna text är maskinöversatt ** Batteries that can withstand faster charging without much wear and tear facilitate the transition to a fossil-free society. The raw material needs are not as extensive when you can manage with a smaller battery pack, so also the waste that is generated. The project results were completely in line with what we predicted and show that we add both increased safety and increased service life in cases where fast charging is used. We have been able to see that the technology also leads to easier recycling.

Approach and implementation

** maskinöversatt ** Tough charge and discharge tests have taken place at the cellular and modular levels, with and without our cooling. In addition to the increased performance and service life (actually reduced wear), we have also seen how we increase safety with reduced fire risk due to thermal rush. Practical results have been incorporated into a theoretical model to be able to simulate, predict and design new modules. When we then compared our calculations with measurements, we have obtained very good agreement, which proves that our theoretical model now agrees well with reality.