Battery pack size versus application is an interesting comparison. The plot is based on real data from real products in the market and shows total battery pack size. The Y-axis is a logarithmic scale and hence the eLorry battery is nearly 6 orders of magnitude, or 1 million times, bigger than the smart watch battery.
Battery pack mass estimation is a key parameter required early in the conceptual design. There are a number of key reasons for estimating the mass, one of the main ones being the significant percentage it is of the overall mass of the complete system. One option is to list all of the components and assign … Read more
From 2026, Audi will only launch new all-electric models, the Audi PPE – Premium Platform Electric is their move to an 800V system and a consolidation on the number of parts. This presentation was given to a UBS investor meeting over a year ago, but worth looking at as it shows the Audi strategic thinking. … Read more
Lets look at the inputs to pack sizing, what do we need to know in order to size a pack? At the early stage you don’t need to think about total energy, concentrate on the usable requirement and conditions at which that needs to be achieved. The minimum and maximum voltage is likely to be … Read more
The modular vs dedicated BEV platform is an interesting problem facing automotive OEM’s as they balance their need to produce Internal Combustion Engine (ICE) vehicles and Battery Electric Vehicles (BEV). The trouble is we are in a world that still wants both vehicle options and vehicle platforms are expensive. The modular vs dedicated BEV platform … Read more
When we look at automotive battery pack design there have been a number of pack generations. The general theme is to simplify and hence reduce the cost. Initially we saw packs built from small modules of around 12 cells. The next step in pack generations is possibly going to be a cell to vehicle design. … Read more
The Nissan Leaf is perhaps the iconic original OEM BEV. Therefore, interesting to see how it performs against the competition over the years. The pack gravimetric density versus year of introduction is an interesting plot. Arguably the energy density should be outstanding as these packs are passively cooled. However, they are also conservative with respect … Read more
Cell to Pack is all about reducing cost and increasing the volumetric density of battery packs. This is primarily aimed at road vehicle battery design. Conventional battery pack design has taken the form: Cell -> Module -> Pack This means we add material to make the module strong enough to be handled, it needs fixings … Read more