What is the difference between a range extender electric vehicle and a plug in electric vehicle

Extended-range electric vehicle catalog.

Foreign "extended-range electric vehicles".

Volt Chevrolet.

Domestically produced "extended-range electric vehicle".

Why are extended-range electric vehicles different? Foreign "extended-range electric vehicles".

Volt Chevrolet.

Domestically produced "extended-range electric vehicle".

Why are extended-range electric vehicles different?

Briefly. The extended-range electric vehicle is a steam that mainly uses an electric motor and the engine as a supplement.

Energy saving and emission reduction, the engine has been in the best working condition, high efficiency, low emissions. The comprehensive fuel-saving rate is high, and the fuel saving is more than 50%.

The battery capacity of the extended-range electric vehicle is generally enough for pure electric driving for dozens of kilometers, and the battery can be charged by the engine in addition to being connected to an external power supply like a plug-in hybrid vehicle. When the battery is low, the engine is used to generate electricity, charge the battery, and work in the optimal speed range, and the battery then provides energy to the electric motor of the direct drive vehicle, which is the range extension mode.

Disadvantage 1: The battery is charged by the engine, and then powered by the battery, which is easy to cause energy loss in the process.

2. The essence of dependence on fuel has not been solved, and the fuel consumption has not been progressively reduced, and the comprehensive cost performance is not high.

3. The extended-range electric vehicle is driven by the motor and engine, and when driving at high speed, the fuel consumption will increase accordingly due to the increase of its own weight.

1. It can be operated in pure electric mode, the required battery capacity is small, the cost is low and there will be no power breakdown.

2. Plug-in square mold operation, further improving the fuel saving rate on the basis of hybrid.

3. The battery charging power is small, and there is no need to build large-scale charging facilities.

4. The battery can be charged and discharged shallowly, which is conducive to battery life.

5. It has an external charging method, which can be charged at night with low-cost and low-valley electricity.

6. Simple structure, direct drive motor, easy to repair and maintain, easy to realize industrialization.

7. Energy saving: The engine has been in the best working condition, with high efficiency and low emissions.

8. Emission reduction: The comprehensive fuel saving rate is high, and the existing technology can save more than 50% of the fuel.

What is a Range Extender Electric Vehicle? China's national standard GB T19596-2017 "Terminology for Electric Vehicles" has a detailed overview of several types of electric vehicles. In addition to pure electric vehicles, the others are hybrid vehicles, and there are also detailed descriptions for extended-range electric vehicles.

When the on-board rechargeable energy storage system can not meet the requirements of the cruising range, the on-board auxiliary power supply device is turned on to provide electric energy for the buried hidden system of the power system and extend the cruising range, and the on-board auxiliary power supply device has no transmission connection with the drive system such as the transmission shaft (belt). ”

In this description, there are two important points, the first is "on-board auxiliary power supply unit" and the second is "no transmission connection". This shows that the extended-range electric vehicle is a series hybrid vehicle, because its driving force can only come from the electric motor, and other power units are not involved in the drive.

What is a plug-in hybrid electric vehicle? Under normal circumstances, an electric vehicle that is able to draw power from an off-board device is called a plug-in hybrid. Plug-in types belong to one type. Generally, we are used to calling this electric car plug-in.

If you understand this, you will know the difference between an extension and a plugin. At present, the domestic new energy policy is here, and the new promotion plan must allow fees. The extensions we've seen are basically series plug-in hybrids like the Lee One.

And in terms of subsidy policy, the current extended-range electric vehicles are classified as plug-in hybrid vehicles, so now we can think that the additional search service electric vehicles belong to plug-in, I don't think so. As for whether it must be a series, but now the national standard says that the extended-range electric vehicles must be series, and I don't know what will happen in the future.

Millions of car purchase subsidies.

The differences between the extended-range electric shouting EMU and the plug-in type are as follows:1. Different Principles:

Extended-range electric vehicles rely on electric motors to provide power; Plug-in electric vehicles add an electric drive system to ordinary fuel vehicles. Both the engine and the electric motor can drive the vehicle independently or in combination. 2.

Different features: extended-range electric vehicles can cancel the power transmission system of traditional cars; Plug-in electric vehicles can be charged via charging stations or on-board chargers, and the engine can be either petrol or gas. 3.

Different systems: The extended-range electric vehicle is composed of a power battery system, a power drive system, a vehicle control system and an auxiliary power system; Plug-in electric vehicles consist of a generator, engine, rectifier, battery, traction motor and mechanical transmission.

The differences between range-extender electric vehicles and plug-in electric vehicles are as follows: Different principles: extended-range electric vehicles rely on motors to provide power; Plug-in electric vehicles are electric vehicles that add an electric drive system to ordinary fuel vehicles.

At the same time, both the motor and the motor can drive the vehicle independently or in combination. Different features: p

The differences between range-extender electric vehicles and plug-in electric vehicles are as follows:

Different principles:

Extended-range electric vehicles rely on motors to provide power; Plug-in electric vehicle socks are electric drive systems added to ordinary fuel vehicles. At the same time, both the engine and the electric motor can drive the vehicle independently or in combination.

Different features:

Extended-range electric vehicles can eliminate the powertrain of traditional cars; Plug-in electric vehicles can be charged via charging stations or on-board chargers, and the engine can be either petrol or gas.

Consists of different systems:

The extended-range electric vehicle consists of a power battery system, a power drive system, a vehicle control system and an auxiliary power system. Plug-in electric vehicles consist of a generator, engine, rectifier, battery, traction motor, and mechanical transmission.

Is plug-in hybrid a new energy source?

Electric hybrid is a new energy source. Plug-in hybrid vehicles are currently the transitional models between gasoline vehicles and pure electric vehicles, and its purpose is to let more people understand and use new energy vehicles. Due to the problem of pure electric vehicle range, the emergence of plug-in hybrid vehicles can make up for it, and at the same time, it can further promote the construction of charging piles.

Here's an introduction to the plug-in hybrid model:

Series Plug-in Hybrid:

Series plug-in hybrid, also known as range extender. If the engine does not directly drive the car, it must first drive the generator to generate electricity, and then power the electric motor to drive the car. The energy transfer chain is long, and the overall efficiency is not high.

Parallel plug-in hybrid:

This kind of engine and motor can drive the car, with many power transmission modes, good power performance, simple structure, and wide application, which is the mainstream technical route.

Hybrid Plug-in Hybrid:

Also known as power split; Two motors (one generator and one motor) are generally required, as well as a planetary gear unit for power splitting.

What is the difference between a plug-in electric vehicle and an extended-range electric vehicle? @2019

To understand in a relatively simple and crude way, the extended-range electric vehicle is an electric vehicle that carries a generator with it, but this generator is just an engine, and the most representative extended-range electric vehicle is the ideal one.

The working principle of the extended-range power system.

As can be seen from the figure above, the extended-range power system is mainly composed of four parts: battery pack, range extender, generator and drive motor, of which the range extender is the gasoline engine.

When the battery pack is fully charged, it is responsible for supplying power to the drive motor to drive the wheels; When the battery pack is low, the range extender drives the generator, which charges the battery pack and powers the drive motor.

Compared with pure electric vehicles, extended-range electric vehicles have more advantages in terms of battery life, which solves the problem of range anxiety of pure electric vehicles, and to some extent, extended-range electric vehicles are the best choice at present.

The biggest difference between the plug-in hybrid system and the extended-range power system is that the engine will participate in the drive, in order to facilitate the understanding of the principle of plug-in hybrid, you can see the following figure:

The engine of the plug-in hybrid system can drive the generator to charge the battery pack, and it can also drive the final drive to drive the wheels, which is the case with BYD's DM-i super hybrid.

The advantages of extended-range electric vehicles are that they can be on the green card, have a good power experience at medium and low speeds, have lower fuel consumption than fuel vehicles, and have no range anxiety.

As for the disadvantage, it is the unequal charging efficiency and power output demand. At this stage, the maximum speed of high-voltage DC fast charging is 80 kWh, and the power generation efficiency of the range extender is usually not more than 40 kWh, most of them are within 30 kWh, but we usually need to start with more than 30 kWh, and if it is high-speed overtaking, 80 kWh may not be enough.

Objectively speaking, if the charging power is too large, or the charging frequency is too frequent, it will also damage the service life of the power battery. This is also the reason why the extended-range electric vehicle is rejected at this stage, so the carburetor charging scheme in the extended-range mode usually needs to be adjusted more conservatively.