The current module used by UH Racing is the Energus Li1x5pVTC6T - which features five of the Murata US18650VTC6 cells connected in parallel, with built in fusing and temperature sensors. UH25 uses 138 modules in series, providing an overall capacity of 7.7kWh and a maximum voltage of 579.8V, which is more than enough to finish the endurance event without the assistance of regenerative braking. UH26 sought to maximise voltage, and by using 140 modules, we were able to achieve 588V and 7.812kWh. However, the main drawback of this approach was the added mass, as well as the fact the capacity was already in excess of what was needed to finish the endurance event.

The pouch cell mentioned in the 'Cell Type' article is a 12000mAh, 4.2V maximum, LiCoO2 cell from 'Electric Power'. The proposed system uses 144 cells in series, which allows us to achieve a maximum voltage of 600V by limiting the charging voltage to 4.16V via the AMS. With a nominal voltage of 3.7V, we achieve a overall capacity of 6.394kWh. The excellent discharging and charging characteristics of the pouch cell enables us to discharge at 300A continuously and burst-charge at 120A. This is a significant improvement over the Li1x5pVTC6T module, which can only discharge at 150A and burst-charge at 80A.

Given that the initial idea was to use the Li1x4pVTC6T modules, a four cell variant of the modules used in UH25 - the proposed system will ensure our regenerative braking system is much more effective.