What is vehicle-to-vehicle charging technology? What is V2G?

V2G Introduction

The so-called V2G is actually Vehicle to Grid, which can realize the interaction between electric vehicles and the power grid, so that electric vehicles can absorb electricity when the power grid load is low, and release electricity when the power grid load is high, earning price difference profits. If V2G is truly realized, everyone can regard each electric car as a small power bank. When the power grid load is low, just plug in the charging gun to automatically store energy. When the power grid load is high, the power of the power battery can be released to the power grid.

V2G Development Stage

According to the National Information Center, the current domestic V2G development stages are as follows:

Before 2020: Carry out small batches of V2G test verification, and the number of electric vehicles participating in the interaction can be controlled to 10-300. The main task of this stage is to verify the interaction technology between multiple electric vehicles and the power grid, and realize the orderly charging and discharging of multiple electric vehicles.

January 2020 to December 2025: Mainly carry out demonstration operation of large-scale electric vehicles (generally no less than 500 vehicles) interacting with the power grid

After 2026: Gradual commercialization and promotion

Introduction to V2X

In fact, V2G is a type of V2X, and there are also V2V (Vehicle to Vehicle), V2L (Vehicle to Load), and V2H/B (Vehicle to Home/Buildings). Below, the editor will briefly introduce to you what V2X means.

V2V(Vehicle to Vehicle)

It is the so-called vehicle-to-vehicle charging technology, which can use the power of one electric car to charge the power battery of another electric car through a charging gun. There are DC vehicle-to-vehicle charging technology and AC vehicle-to-vehicle charging technology. For AC vehicle-to-vehicle charging, the charging power is generally limited by the influence of the on-board charger, and the charging power is not large, which is actually a bit similar to V2L.

V2L(Vehicle to Load)

V2L is to use the electric vehicle as a mobile power source to discharge electricity for a third party, such as using the electric vehicle to discharge electricity for barbecue outdoors.

V2H/B(Vehicle to Home/Buildings)

V2H/B is the interaction between electric vehicles and residential/commercial building electricity. In the event of a power outage, electric vehicles serve as emergency power sources for important equipment in homes/public buildings.

WM EX5-Car-to-Car Charging Technology

summary

The power battery is a mobile electric energy storage power bank. When the smart grid technology matures in the future, it will be possible to realize the interaction between the power grid and electric vehicles, thereby maximizing the rational use of electric energy, reducing the impact of electric vehicle charging on the power grid, and the unnecessary waste of electric energy.