Irrespective of the hybrid drive type, all vehicles have (or, with some providers, will in the future have) one component in common: the 48 V battery. In the mild hybrid, for example, the battery feeds the current to an electric motor, which can be connected, for example, to the belt drive of an internal combustion engine. The battery recharges itself through the recuperation technology. This energy, which would otherwise be lost as waste heat, can now be used. An AC-to-DC converter converts the voltage of the 48 V battery to the lower level of the 12 V on-board electrical system. Thus, on-board electrical systems can be supplied and additional torque can be provided to assist in propelling the vehicle. The 48 V electrical systems are therefore an important prerequisite for electric or partially electric vehicle propulsion.
And the technology is making great progress: for example, Bosch offers a 48 V battery that is the size of a shoebox and makes do without additional cooling systems. The crucial aspects of space requirements and additional weight are thus kept as low as possible.