Peak vs Continuous Power

Peak vs continuous power is a recurring question across the electrification space. We need to deliver a repeatable amount of power for the user to have confidence in the machine and we need high power numbers to deliver the brochure wow factor. The transient peak power works well for a number of vehicle applications. However, … Read more

Electrified Aircraft Propulsion Targets

NASA electrified aircraft

A look at the electrified aircraft propulsion targets. NASA state in their November 2021 presentation that they have the following requirements for the battery pack: The targets at pack level are rather tough: The gravimetric energy density plotted versus total pack energy shows that the automotive packs are currently plateauing around 180Wh/kg. The roadmap to … Read more

Cell to Pack Mass Ratio

cell to pack mass ratio

The cell to pack mass ratio is a simple metric to calculate and gives you an idea as to the efficiency of your pack design. This is simply the total mass of the cells divided by the mass of the complete battery pack expressed as a percentage. The larger the percentage the better: An interesting … Read more