What is the virtual power of electric vehicles?
Common electric vehicles on the market use a voltage-following scheme to display the power.
The disadvantage is that the power display is inaccurate, especially after the battery has been used for a period of time, the output voltage of the battery is greatly affected by the discharge current of the vehicle.
Even if the battery is fully charged, when the vehicle is started with high current, the meter will show a sudden drop in power.
In addition, when the battery power of the party is low, the meter shows that the power is very low during the riding process. Once the vehicle stops, the output voltage of the battery will rise, causing the power of the meter to increase synchronously, and even display full power.
The meter's power display accuracy in this scheme is very low, and the display error is at least 20% or more, and even more than 50% in severe cases.
What is SOC?
SOC is the abbreviation of state of charge, which represents the state of charge of the battery, that is, the ratio of the current remaining capacity of the battery to the full capacity, usually expressed as a percentage.
If SOC=100%, it means the battery is fully charged, and if SOC=50%, it means the battery is half charged.
The SOC power calculation is to obtain a more accurate power value by collecting the charging and discharging current of the vehicle in real time and integrating it, and the error can be controlled within 5%.