Have you ever thought that electric vehicles are a huge mobile power source? For example, when your phone runs out of power, connect it to a port on an electric car to charge it. Similarly, not only mobile devices but also any other device that uses electricity as an energy source can draw electricity from electric vehicles. Even when your home is out of power, electric cars are the best backup power source. All this without illusions, Nissan has helped us to achieve.
Nissan recently tested its Vehicle-To-Building technology and successfully used six Leaf electric vehicles to power its advanced R&D center in Atsugi City. The six Leaf electric vehicles can reduce the power consumption of the R&D center during the peak period of electricity consumption by 2.5%. Since Japan also uses a step-by-step peak-valley electricity price calculation, electricity prices are slightly more expensive during peak hours. In this rough calculation, the Nissan R&D center can save electricity costs of US$4,800 per year by utilizing the amount of electricity previously prepared in the Leaf electric vehicle.
In view of this, it is an economical practice to regard electric vehicles as a power reserve facility. Of course, in the Vehicle-To-Building technology, the system must ensure that the battery of the Leaf electric vehicle is fully charged when its owner (usually a Nissan employee) gets off work. However, there is little wonder if the R&D personnel of this technology have considered: If someone leaves early, then? Another problem: This cycle of battery charging and discharging of electric vehicles is bound to weaken the battery life to a certain extent. For the laminated lithium-ion battery used by the Leaf, each complete charge and discharge will cause the degeneration of the battery raw materials, thereby reducing the power. For these issues, I believe that through the power management and scheduling mechanism in the future, it will be completely resolved.
The Nissan Leaf is the world's first pure electric vehicle that can be delivered for daily use. It carries an electric motor with a maximum output of 80 kW, a battery capacity of 24 kW.h, and cruising range of around 135 km (EPA certification). Such a car can fully meet the daily needs of urban residents. The 5-door hatchback design and close to $30,000-a-front-to-home price have made it the best-selling pure-electric vehicle in the North American market.
What can a 24kW.h battery do? In Japan, the average daily power consumption of a family is around 10-12 kWh. Therefore, a Leaf electric vehicle can theoretically provide a family with two days of live electricity, which is another EV power recovery technology Leaf-To-Home that Nissan is testing. Do not underestimate this use. In earthquake-prone Japan, power outages are an unavoidable emergency because the energy recovery of the Leaf can provide energy in times of crisis. From the macroscopic aspect of a city's operation, the amount of electric vehicle ownership is the reserve of reserve power for the area. It is no exaggeration to say this. Of course, in addition to special circumstances, the Leaf-To-Home technology in daily life is still very useful. For example, when people go out on the outskirts, the power supply is often a headache.
The basic principle is to connect the Leaf electric vehicle to the home power supply network through the PCS (Power Control System). Leaf's battery will provide a maximum power output of 6kW. This will ensure that the most power-consuming household appliances (such as microwave ovens, air conditioners, etc.) can also operate normally at the same time without tripping. Such a system is of great importance for building smart, low-carbon residences because it incorporates a car such as a car as a home appliance. It is reported that the installation price of the Leaf-To-Home system is 330,000 yen (approximately RMB 19,500), which does not sound cheap either.
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