Rivian today unveiled the R2 electric SUV and its younger sibling, the R3. Both models are built on the same platform and are designed for a new battery pack with cylindrical cells with a diameter of 46 millimetres and a height of 95 millimetres. The specifications have not yet been revealed, but it is already clear that they are larger than the Tesla 4680 battery.
Rivian will likely use traditional lithium-ion chemistry in its cylindrical cells. The increased size will increase the rated capacity of each cell. In addition, larger cells can typically charge and discharge at a higher rate.
This means that the Rivian R2 and R3 will likely be able to charge faster and deliver more peak power than if batteries based on 4680 cells were used. Regenerative braking of the vehicle could also be more intense and efficient.
Rivian is not the first to focus on 4695 cells, however. BMW has chosen the same size for its future Neue Klasse electric cars from 2025. Currently, companies such as Samsung SDI, Panasonic and LG are producing batteries of this type.
Rivian's published images show that the battery consists of three large modules separated by thick crossbars. Each module fits 34 cells wide and 8 deep, for a total of 272 cells. Motor1 suggests that this design could potentially deliver up to 900 kW or 1,200 hp. In that case, these new battery cells will likely deliver performance on par, if not higher, than Tesla's.
Source: Motor1
