The present situation and development trend of the electric car battery

Source: 2020 - 04 - This was hits: 10 times the development of electric vehicle battery ( 1) The advantages of electric cars compared to fuel vehicles, electric vehicles has incomparable advantages. Details are as follows: ( 1) To protect the environment. The electric car battery, no emissions, no damage to the environment, it is fuel cars. This is the current advocate low carbon life and the new trend of development of the energy of environmental protection. ( 2) To save energy. Electric cars can achieve energy recycling, can recycle about 40% of the energy when braking, improve the energy efficiency. ( 3) Light and compact structure. Because the battery is small in size, can be scattered layout, so the whole layout more compact than the engine. ( 4) The electric car driving more convenient, it easier to start, speed regulation more smoothly. ( 5) The manufacturing cost is small, is not affected by the engine vibration, relative to improve service life. ( 2) The development of electric vehicle battery electric vehicle based on battery energy of clean vehicles. It integrates the new technology, new material and new energy. It will be one of the important means of transportation in the 21st century. Current electric car technology is restricted by three main factors: one is charging a relatively low, a fully charged distance is relatively short, 2 it is charging time long, it's not convenient to use; Third, the small amount of charging and its electric vehicle equipment quality, thus affecting the improvement of the acceleration and the maximum speed, can't compete with fuel cars. Therefore, is crucial to the development of electric vehicle batteries. Has successfully developed the main battery: lead batteries, nickel cadmium batteries and fuel cells. Relative: for electric car batteries minimum acceptable & gt; 100 w h/kg ( WHK / g) Than the power & gt; 150 wk/g a, circle life & gt; 600 times, a single charge & gt; Zokom, economy, reliability and safety performance. Than batteries can decide the electric car driving distance, than can affect the electric car of maximum speed, acceleration and gradeability. Electric cars generally consists of three parts: the battery, motor and control system, is one of the most critical part of the battery. Battery acid batteries, alkaline batteries and fuel cells. Work is the most widely used lead-acid batteries, it is reliable, cheap, but low energy density, short service life. Alkaline batteries, such as nickel and iron battery, nickel zinc battery, nickel metal hydride batteries, etc. , high energy density, long service life, but expensive. Fuel cells, such as hydrogen fuel cells, as security problems and the use of some expensive metal, the price is too expensive and not widely used. Electric cars, the application of energy storage technology is mainly electrochemical energy storage technologies, namely, lead acid, nickel metal hydride, nickel cadmium, lithium ion, sodium sulfur battery energy storage technology. In the past, these energy storage can, or power, charging technology, the service life of serious deficiencies, safety, cost and other aspects, restricting the development of electric vehicles. In recent years, the electric car battery technology research and development such as energy, transportation, electric power sector by the governments, the battery has been improved. Lithium ion battery technology, for example, have made a breakthrough in terms of security. These are expected to push the mass commercialization of electric vehicles. Pure electric vehicle batteries are the three key components, motor and electric control, the battery is at the core, the most valuable part in industry. At present, China has formed a complete lithium ion power battery industry chain, for the development of pure electric vehicles to lay a certain foundation. Our country has developed many elements in polymer lithium ion battery, dual stator magnetic levitation dc motor drive, battery management and electronic control system, and other products, can be widely used in passenger cars, passenger cars and military power. High performance power battery, drive motor and its control system technology breakthrough will accumulate engineering technology, speed up the pace of industrialization. The pure electric vehicle product technology and the industrialization of our country strong foundation, basic synchronization with the international, and also has a unique advantage in some areas, pure electric bus power system has been made in our country.