Extra Fast Charging Results
The FC program previously announced on 22 June 2021 recently ended in a huge success. The program used 2-3Ah cells which had a retention rate of over 60% at 2C-2C rates (30 min charge and 30 min discharge) after over 6000 cycles and at that point the decision was made to fast track the EFC program using larger commercial cells.
There were minor delays in the installation of high voltage power into the building to run these tests as the charge current needed is as high as 70 Amp.
The EFC program has cells currently running with a 15 min charge and variable discharge rate as part of initial test protocols. To date the results received have been very exciting with over 250 cycles achieved without any capacity loss.
The plan is to take this program to over 3000 cycles and then run new programs at a higher current to achieve a 10-minute charge and then onto a 6-minute charge.
The optimised cell is still within 95% energy density of a regular energy cell, which means minimal energy density loss. Such high-power density without any Cobalt and Nickel for a Non-LFP cell makes C4V’s technology a leader in the marketplace.
The tests were done at 90% DOD which equates to a maximum energy being infused and withdrawn during charge and discharge cycles. These cells were made with standard scalable processes as well as materials used from highly qualified suppliers which will allow the scale- up of the technology with limited variability leading to a speedy launch in the marketplace.