More than 10 meters and less than 30 meters are the most energy efficient, so drive at a constant speed.
1. The faster the electric vehicle travels, the greater the impact of wind resistance will be on the electric vehicle and the more additional energy will be consumed. The faster an electric vehicle drives, the greater the wind resistance. Generally, wind resistance occurs when the speed exceeds 25 km/h, and it becomes very obvious when the speed exceeds 40 km/h. If wind resistance is significant, cruising range will be reduced.
2. In actual use, braking situations will always be encountered. For example, avoiding people, running into red lights, etc. Frequent activation of this process consumes the most energy. Frequent braking and starting, as well as direct rotation of the handlebars when accelerating, waste electrical energy and reduce mileage.
3. The same electric energy is slower than intermittent running, and the distance is much longer. The faster you drive, the greater the energy loss.
4. Low speed and constant speed driving can achieve the maximum mileage. When approaching an intersection, release the steering wheel and let the car roll and slow down naturally. This can save energy compared to braking and slowing down directly when you reach the intersection.
Similarly sized fuel vehicles and purely electric vehicles
Same driving habits
Why are fuel vehicles so fuel efficient at high speed
Purely electric cars drive at high speed but consume a lot of electricity?
The biggest difference between fuel vehicles and purely electric vehicles is the powertrain, which is alsothe main reason for the difference in power consumption at high speed.
The energy consumption efficiency of a fuel vehicle engine varies significantly at different speeds. Engine efficiency is very low at low speeds. The use of new technologies such as the Atkinson cycle, Alto cycle plus dual Atkinson cycle system, direct in-cylinder injection or turbocharging can slightly improve efficiency.
There are also extreme situations where the efficiency of fuel-powered vehicles is zero. For example, the efficiency of burning fuel and not leaving the road while idling is 0. The efficiency of fuel vehicle engines is greatly improved when operating at high speeds, typically reaching 30 % to 45%, which far exceeds the negative effects of increased wind resistance. The result is naturallyt very fuel efficient, and high speed fuel consumption can. is often halved compared to fuel consumption at low speeds.
Although wind resistance was much greater at high speeds than at low speeds, with greatly improved engine efficiency and almost no need for braking and re-acceleration, the car ran smoothly.
The engine efficiency of pure electric vehicles is almost not affected by the number of revolutions and can always be maintained between 80% and 90%. There is no need for part of the energy to be lost through the gearbox, so pure electric vehicles save energy at low speeds.
Although pure electric vehicles can maintain 80% to 90% motor efficiency when operating at high speeds, wind resistance increases as the square of the vehicle speed. The higher the vehicle speedhigher, the greater the wind resistance. pure electric vehicles must overcome. Therefore, high-speed electric vehicles The energy consumption will be much higher than that of low-speed electric vehicles.
The picture below is the efficiency diagram of the drive motor of a pure electric vehicle.
Another technology used to save energy at low speed of pure electric vehicles is the recovery of kinetic energy. The vehicle drives at low speeds and decelerates frequently, recycling it each time energy is transferred back into the battery.
To put it simply, fuel-powered vehicles are more fuel efficient when traveling on highways, with fuel efficiency of 30-45%; pure electric vehicles are the most energy efficient when driving on highways. When operating at low speeds, energy efficiency isfrom 80% to 90%, plus 20% kinetic energy recovery, the energy saving effect is surprising. Now, do you still think it is abnormal for your pure electric car to quickly lose power when driving at high speed?
Therefore, the following four conclusions can be drawn from the above analysis:
1. Electric vehicles have the best energy saving effect when driving at medium and low speeds (around 20 - 200). 60 km/h). It is the most energy efficient.
2. When electric vehicles drive at high speeds (over 90 km/h), they have low energy saving effects due to the high wind resistance, which means they consume relatively a lot of electricity .
3. Frequent acceleration and deceleration of electric vehicles will reduce efficiency, but it is slightly lower than that of carbureted vehiclesant. Stopping and waiting for red lights will not increase additional energy consumption.
4. Although electric vehicles are very energy efficient when driven as mentioned in the first three items, their energy saving effect is not as obvious as that of fuel vehicles.
So don't think about it too much. Drive an electric car casually. As long as it's safe, you can exercise if you want. Be the first to exit the traffic lights. If you want to overtake, just press the switch to overtake. Because you pay attention to it, the small electricity bill you save is really insignificant~
If you really want to save electricity or improve battery life, without changing the car, mainly look at the following tips:
1. No matter in winter or summer, use lessair conditioning, less air conditioning use, less air conditioning use! This tip is particularly useful.
2. A garage or underground parking lot is the best partner for electric vehicles. If you have a garage and the temperature in the garage is above freezing, or underground parking, the impact on battery life is significant. electric vehicles in winter will be much smaller. In summer, it is not exposed to the sun and does not require strong cooling operation of the air conditioner, saving electricity. The energy saving effect in both cases is very obvious.
3. Plug in the gun to preheat: Many vehicles these days have preheat functions. When you go out in winter, you may use the electricity from the charging pile to preheat the battery, which may reduce the power. heating consumption of thebattery and increased battery life This article is from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.