Battery for electric vehicles

Battery is the power source for electric vehicles. At present, the constraints of electric vehicles is a key factor in the development of battery power is not ideal. The major electric vehicle battery performance than energy, such as over power and life. To make electric cars can compete with the internal combustion engine car, the key is to develop high-energy than the power of large, long life, low cost of the XPS M1210 batteries.

Lead-acid batteries

    

Lead-acid batteries have more than 100 years of history, is widely used as the internal combustion engine start-up power source for vehicles. It is also a mature electric vehicle batteries, which the reliability of a good, easy to get raw materials, cheap; than power has basically been able to meet the power electric vehicle requirements. However, it has two major drawbacks; First, low energy, accounting for the quality and size too big, mileage and shorter charge time; the other is a short life, the use of high cost.

Ni-MH battery

    

Ni-MH batteries are alkaline batteries, Ni-MH battery cycle life is longer, no memory effect, but higher prices. Its initial acquisition cost, although high, but because of its energy and life in the area, so the actual use of its long-term cost was not high. At present foreign produce nickel-metal hydride batteries for electric vehicles are mainly the Ovonie, Toyota and Panasonic, a joint venture. 80A h and Ovonie existing two unit cell 130A h, the specific energy of 75-80W h / kg, cycle life of more than 600 times.

This inspiron 1300 battery is installed in several electric vehicles on the trial, in which a charge for a class of vehicles can be driven 345km, there is a car traveling on a year more than 80,000 km. As a result of higher prices had not yet been mass-produced. Has developed a domestic 55A h and 100A h cell battery, than the energy of 65 W h / kg, power density than the nickel-metal hydride batteries 800W/kg.

Lithium-ion battery

    

Lithium ion secondary battery as a new type of high-voltage, high energy density rechargeable batteries, its unique physical and electrochemical properties, a wide range of civilian and defense applications prospects. Its outstanding features are: light weight, energy, and pollution-free, no memory effect, long service life. Weight at the same volume of cases, the lithium battery is a nickel hydrogen storage capacity of 1.6 times the battery is Ni-Cd battery 4 times, and only the current of human development and utilization of its theoretical capacity of 20% ~ 30%, development prospects are extremely bright .

At the same time, it is a real green battery, no pollution to the environment is the best electric car can be applied to the Thinkpad T60 battery. Nineties in China from the beginning of the twentieth century the development and utilization of lithium-ion battery, a breakthrough has been made so far, fully developed with independent intellectual property rights of lithium-ion battery.

Ni-Cd Battery

    

Application of nickel-cadmium battery only to the extent of lead-acid laptop batteries, the specific energy of up to 55W h / kg, than the power of more than 190W/kg. Fast charging, long life cycle is more than twice as much lead-acid batteries can be achieved several times in 2000, but the price of lead-acid battery for 4 to 5 times. Its initial acquisition cost, although high, but because of its energy and life in the area, so the actual use of its long-term cost was not high.

The disadvantage is that the “memory effect” likely to result in poor charge-discharge capacity of the battery can be reduced. To be in use after about ten times for a complete charge and discharge, if have a “memory effect”, should be continuous for 3 to 5 complete charge and discharge times in order to release memory. Toxic cadmium addition, attention should be paid to the use of recovery work to do a good job in order to avoid environmental pollution caused by cadmium.