This is called the vehicle-to-grid, better known in English as vehicle-to-grid or V2G, and it is not new. The network-vehicle concept assumes that a vehicle remains parked most of the time. So, with the deployment of renewable energies, when the vehicle is electric, during this time it can very well participate in supporting the network by delivering energy to it.which he stored. In other words, its battery serves as a storage source and can feed the network if necessary or help make a house a little more energy independent. When the energy is sufficient, on the other hand, it is the car that fills up. To achieve this, it is necessary to have a two-way charger. It can just as easily recharge a battery as use it to return energy to the mains or to power tools and electrical appliances, for example. This process already exists at Hyundai, Kia or Ford and the Renault group has just announced that it could well be deployed within ten years on the brand's ranges of electric vehicles. The charger has the particularity of having been developed by Renault with the CEA. It will be small in size and integrated directly into the vehicle.
30% less energy loss
With this 22 kW (three-phase) internal charger called "alternating current", the recharging time would be reduced, but above all the loss of energy that occurs during charging would be reduced by 30%. For this, the labs have bet on semiconductor materials, such as Gallium Nitride (GaN) or Silicon Carbide (SiC) which are components of the “Grand Gap” class. They are essentially the ones who come to contribute to the reduction of the heating during the conversion.
Today, without this type of semiconductor, this energy loss amounts globally to around 20% for domestic terminals. This means that the kWh consumption is heavier than what was actually consumed to recharge the battery. In the end, this heavily inflates the share of the electric vehicle on the domestic energy bill. It must be said that on these energy losses, Renault is currently one of the bad students. The only concern is that it will take about ten years to be able to benefit from this improvement on the brand's vehicles. This means that the first versions of the 4L and the electric R5 presented at the last Paris Motor Show will not have this bidirectional compact charger.
