TU-TESL

• 22

When Benjamin Franklin opened the way to the electric world in 1752, he probably never thought that one day, electricity would drive cars. Today's vehicles can be charged through a home outlet. They are more sustainable, cost less per kilometer, and have the same (or even better) performance. AC, DC, and hybrid electric vehicles can use the home grid or charge quickly. The difference is that the household current is alternating current, while the fast charging is direct current. Therefore, different connectors are required. "MII Electric has a combined system that can charge both at the same time. The time required at home will depend on the amount of electricity specified in the contract or the use of wall boxes. When using a fast charger, the charging time can be reduced by more than five times. " Francesc Sabat é, head of energy system development at seat, said. If the car is charged through the home AC network, the power will first flow through the charger located under the engine through the charging cable. Because this is a high voltage system, the whole circuit has a high security. "MII Electric is constantly checking the parameters of the whole system. If the measurement results do not meet the set level during the inspection, the system will automatically disconnect. " The charger ensures that only direct current can reach the battery, so it can convert the current provided by the home network. If the vehicle is charged via DC in the fast system, it does not go through this phase, but directly into the battery. The current has now reached its destination, the battery. This is not a single unit, but is divided into modules, which are then divided into multiple units in turn. The advantage of the system is that if one of the modules fails, it can be replaced independently without affecting the rest of the battery components. "Compared with fuel vehicles, electric vehicles have lower energy consumption in cities and can recover energy when braking, which is why MII electric vehicles have a endurance of 260 km in the combined cycle and 360 km in the vehicle. Santi Castell á, seat's electric vehicle director, explained. The electric propulsion motor can now be started. Technically, it converts three-phase voltage into power. Once operated, the same power will be maintained almost throughout the load level range. Unlike vehicles with internal combustion engines, electric vehicles provide full power from the start. At the actual level, for the MII electric, it can provide 61 kW (83 HP) power and 212 nm torque, so that it can accelerate from 0 to 50 km / h in 3.9 seconds. Today's new electric vehicles adjust their design to fit the shape of the battery under the car. However, when converting to electricity, there is no change in the structure or internal space of the MII, because the battery is specially made for this model. The MI has a range of 260 km (combined cycle) and a peak power of 61 kW. The rechargeable lithium-ion battery consists of 14 module units, each of which has 12 battery units. It is connected to the motor, charger, heating and climate control system compressor. With 40 kW DC, it can be fully charged in one hour; with 7.2 kW AC, it can be charged to 80% in four hours.