from chemistry to pack
Cell Sample Maturity is normally defined by the A, B, C, D sample definitions. These stages of the cell design, production line development and material supply are key to the relationship between the cell manufacturer and cell customer. The customer needs to have confidence in the cell design, robustness and quality and this is only … Read more
Cell Gravimetric Energy Density with the units Wh/kg is a key cell metric. The optimum metric is a high Wh/kg. Hence: High nominal voltage High Ah capacity Low mass Perhaps the simplest of the battery metrics as the capacity of the cell is fairly easy to measure and the mass is just a set of … Read more
It is interesting to look at the cell energy density roadmaps and include the production energy density of the cylindrical cell. Why the cylindrical cell? Well, it’s the most complete cell in terms of function as it has a case that contains the working forces over the lifetime. It normally has a venting system and … Read more
Lithium sulfur is perhaps the most mature of the ‘beyond Li-ion’ battery chemistries with a potential energy density of >600Whkg-1. Also with the potential for substantially reduced costs and improved safety. However, a number of challenges mean that cycle life has been poor. Hence the potential attracts attention and much needed research at the fundamental … Read more