Ceramic Lithium-Cool Dry High-Performance Battery Technology

March 27, 2020 by Paul Shepard

Envites Energy has announced new battery cells that are to be produced with partners in Germany. This type of battery cell is based on its own IP and the efficient manufacturing process is a separate patent. Battery cells that have special properties at very high discharge rates with a high energy content are in demand on the market for 48V (vehicles) or on-board networks and starter batteries. Especially in the field of different industrial applications.

"This new generation of ceramic-determined high-performance cells is very efficient, long-lasting and safe, was developed in a multi-year development cooperation with Korean partners and shows above-average values ​​from the cell data obtained. Despite high performance rates, it remains 30C cool, which results in advantages that also exist on the battery system price," said co-inventor Tim Schäfer from Envites Energy in Nordhausen.

Specifically, the cell system does not need cobalt or nickel and has the following properties:

  • Cell temperature @ 30C, 26.8°C,
  • Average cell voltage @ 30C, 2.825V,
  • Cell cycles charge @ 5C / discharge @ 10C> 80% @ 2000 cycles,
  • Cell capacity10Ah cell @ 30C 9.7Ah,
  • Capacity ratio (%) @ 30C 96.5%.

The company Envites Energy has designed the new generation of prismatic lithium-ion cells with outstanding properties in terms of current load and cyclical load capacity. Such battery cells are particularly in demand for electromobility (48V, hybrid vehicles, devices). The basis is world-leading properties in terms of energy density / performance and lifespan / safety, costs and ecological footprint.

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In a version with 10Ah capacity, such cells are very resilient, remain comparatively cool, reach over 96% of their capacity under load of 30C with stable voltage and a maximum of approx. 26°C. With regard to the energy density and lifespan of these cells as well as their safety behavior, there are still no battery cells in this segment on the world market.

The cobalt or nickel-free material of the lithium-ion cells with ceramic separator itself is also comparatively advantageously temperature-stable and therefore safer. The costs in the patented Troika manufacturing process are, with comparatively significantly better sustainability and efficiency, globally viable. The process is suitable for industrial use and, by comparison, the production itself is extremely energy-saving.

The excellent cell properties were achieved in an innovative recipe with an additional conductivity additive with regard to electron and heat conduction. While the cathode is made with 94% active material, the anode - designed as a hybrid anode - is even over 94%. Ceramic separators contribute to the longevity and safety of the cell system. A novel electrolyte formulation with additives is key to the novel properties of the system.

All components are selected and developed in such a way that they make up a price that is competitive on the world market in a production solution. The materials can also be obtained in Europe. Target groups are device and industrial battery manufacturers and users, electromobility (48V, hybrid).