Seems BMW have some brand plans on the battery and BEV front starting in 2025/6.
"BMW has announced details of its next-generation lithium ion batteries for EVs, named Gen6.
Due to arrive in the Neue Klasse (New Class) series of cars from 2025, the batteries adopt a cylindrical cell shape – as favoured by Tesla - rather than the flat, prismatic cell shape currently used.
Thomas Albrecht, BMW’s head of Efficient Dynamics, told Autocar: “Gen6 batteries will give us 30% or more range than our current Gen5, but we won’t go over 1000km [620 miles] of range, even though we can. We don’t think that such a long range is necessary.”
DC rapid-charging time is also set to be improved by up to 30%, meaning the Gen6 era of BMWs will be able to support ultra-rapid charging of around 270kW – on a par with the Porsche Taycan.
It’s also estimated that the Gen6 battery packs could weigh some 10-20% less than the existing Gen5 batteries, which weigh roughly 300kg for a mid-range pack.
The forthcoming Gen6 cylindrical cells use a unique BMW chemistry. They measure 46mm in diameter and either 95mm or 120mm in height. Using less cobalt but more nickel, they will be sourced from Chinese battery manufacturers CATL and EV, and are ultimately an evolution of the conventional lithium ion chemistry that's common to today’s EVs.
The change in cell shape has also brought about a new battery-pack design that's slimmer and allows for a more versatile ‘pack-to-open-body’ installation process, whereby the battery essentially becomes an integral part of the car’s structure."
So a structural pack in a 46-95 or 46-120 format, as opposed to the 46-80 that Tesla are moving to, a note on the longevity as well.
“Legislation is coming in to further guarantee battery life. For instance, the US will require a minimum 80% battery performance after 10 years. We're performing better than that.”
Interesting they are looking at up to 620 miles of range, that would be a pretty big pack still if the efficiency of the car(s) remain the same ~4mpkWh, 155kWh to achieve 620 miles. The weight saving will offset some of the bulk, but unless the cost per kWh comes down a lot in the next 5 years, then its going to be on very, very expensive cars only.