from chemistry to pack
AION Engineering INC While silicon (SiOx/SiC/Si) based anodes skyrocket battery capacity, their swelling character reaching up to 300% volume expansion transforms cell design from a purely electrochemical challenge into a brutal mechanical packaging problem. It is not just about how much lithium the active material can store; how the casing structurally resists (its rigidity) when … Read more
With so much data now available in the Battery Pack Database it is interesting to look at Cell to Pack Mass Ratio by Chemistry and Format. Note that for this analysis we have excluded all of the BESS packs as they tend to not be as mass sensitive as mobile applications. The fixed lines showing … Read more
It is really interesting to look at cell chemistry and format vs application, because in principle there is nothing stopping us from applying any chemistry or cell format to any application. In practice, however, the market has converged on some clear preferences. Here we have taken the Battery Pack Database and looked at this question … Read more
What makes a Blade or Prismatic cell what it is? Blade cells are long, thin and have a terminal at each end. But so do some prismatic cells. Is it the ratio of the side dimensions? The following graph shows data from the Cell Database where we have plotted the ratio between the middle dimension … Read more
How does the choice of cell format influence battery pack mass? The three main cell formats: Cylindrical, Prismatic and Pouch. There are pro’s and con’s with each. One of the most significant differences is the amount of mechanical support required. The pouch cell needs the most support and fixing, followed by the prismatic and the … Read more
The function of the cell can or enclosure is to contain the chemistry over the lifetime of the battery cell and to allow the electrical, mechanical and thermal connections. It must also work in the extremes and have a controlled failure mode. The main cell formats are: coin, cylindrical, pouch and prismatic. The main functions … Read more