What are the categories of new energy vehicles?
New energy vehicles are the needs of environmental protection and energy conservation and emission reduction of the earth. Countries all over the world are making plans for the elimination of fuel vehicles. New energy vehicle is a general concept, including pure electric vehicle, extended range electric vehicle, hybrid electric vehicle, fuel cell electric vehicle, hydrogen engine vehicle, etc. At present, the number of new energy vehicles in China ranks first in the world.
Blade Electric Vehicles
Battery electric vehicles (Bev) is a kind of vehicle which uses a single battery as the energy storage power source. It uses the battery as the energy storage power source, and provides electric energy to the motor through the battery to drive the motor to run, so as to drive the car to drive. The rechargeable batteries of pure electric vehicles mainly include lead-acid batteries, nickel cadmium batteries, nickel hydrogen batteries and lithium-ion batteries. These batteries can provide power for pure electric vehicles. At the same time, pure electric vehicles also use batteries to store electric energy and drive the motor to run normally. Tesla's all electric vehicles are very popular in China.
Hybrid electric vehicle
The main drive system of hybrid electric vehicle (HEV) is composed of at least two single driving systems which can operate at the same time. The driving power of hybrid electric vehicle mainly depends on the driving state of hybrid electric vehicle: one is provided by a single driving system; the other is provided by multiple driving systems.
Fuel cell electric vehicle
Fuel cell electric vehicle (FCEV) uses hydrogen, methanol, natural gas and gasoline as reactants in the fuel cell electric vehicle (FCEV) as reactants and oxygen in the air to burn in the battery, thus providing power for the vehicle. In essence, fuel cell electric vehicles are also one of the electric vehicles. They have many similarities with electric vehicles in many aspects of performance and design. They are divided into two categories because fuel cell electric vehicles convert hydrogen, methanol, natural gas and gasoline into electric energy through chemical reaction energy, while pure electric vehicles rely on charging to supplement electric energy.
Hydrogen engine vehicle
Hydrogen powered vehicle (HPV) mainly uses hydrogen powered fuel cell as fuel. Hydrogen powered vehicle is the most environmentally friendly vehicle among new energy vehicles, which can achieve zero pollution and zero emission. However, the production cost of hydrogen powered vehicle is too much, the cost of hydrogen powered vehicle is 20% more than that of traditional fuel vehicle, and the battery cost of hydrogen powered vehicle is very high, so it is difficult to be applied in practical production due to the limitation of storage and transportation conditions.
Extended range electric vehicle
Extended range electric vehicle (Erev) is similar to electric vehicle. It provides kinetic energy to the motor through the battery to drive the motor to run, thus driving the vehicle to drive. However, the extended range electric vehicle is equipped with a gasoline or diesel engine in the body. When the battery power of the extended range electric vehicle is too low, the driver can use this engine to supplement the electric power of the extended range electric vehicle.
Compressed air powered vehicle (APV), referred to as pneumatic vehicle, uses high-pressure compressed air as power source to convert the pressure energy stored in compressed air into other forms of mechanical energy, so as to drive the vehicle. Theoretically speaking, other gas powered vehicles, such as liquid air and liquid nitrogen, which are powered by endothermic expansion, should also belong to the category of pneumatic vehicles.
Flywheel energy storage vehicle
In the process of vehicle deceleration and coasting or braking deceleration, part of the kinetic energy or gravitational potential energy of the vehicle is converted into other forms of energy and stored in the high-speed flywheel for vehicle driving. The flywheel is magnetically suspended and rotates at a high speed of 70000r / min. As an auxiliary in hybrid electric vehicle, it has the advantages of improving energy efficiency, light weight, high energy storage, fast energy in and out response, less maintenance and long life, while the disadvantages are high cost and vehicle steering will be affected by flywheel gyroscope effect.
Super capacitor car
Supercapacitor is a kind of capacitor based on the principle of electric double layer. Under the action of the electric field generated by the charge on the bipolar plate of the supercapacitor, the opposite charge is formed at the interface between the electrolyte and the electrode to balance the internal electric field of the electrolyte. The positive and negative charges are arranged in the opposite position on the contact surface between the two different phases with a very short gap between the positive and negative charges. This charge distribution layer is called the double electric layer, so the capacitance is not Changda. The hybrid power supply composed of super capacitor and battery can fully meet the energy demand of vehicle driving, and can buffer the impact of instantaneous high power on energy storage system, and prolong the service life of battery.