Lithium iron phosphate battery and Electric cars
December 17, 2008, in "FPT Fiat Powertrain Technologies Cup cars Gold List of new energy technologies," the award ceremony, 863 new energy vehicles, head of major projects Mr. Wang Binggang advice about new energy in the vehicle development, said the world will celebrate the rechargeable electric cars and hybrid vehicles a period of rapid development, China will put the two technologies included in the national auto industry development of industrial revitalization plan.
Wang Binggang In particular, the development of electric cars advantages: all the energy can be transformed into electrical energy, its production process with a high concentration of carbon dioxide emissions and easy storage solution, and has high energy conversion efficiency.
Statistics show that the general household vehicle mileage less than 100 km on the probability of about 66%. Wang Binggang everyone calculations: If the estimated 20,000 km of driving, with petrol car fuel consumption of 10 liters per hundred kilometers, and oil prices 6 yuan / L account, then use the fuel costs of 1.2 million; to hundred kilometers of electric vehicles power consumption of 15 kwh and electricity price of 0.5 yuan / kWh, the annual use of electricity is 0.15 million. Batteries, if the design driving range of 150 kilometers, 15 kWh / total power consumption per hundred kilometers, you need 22.5 kwh of the battery, the battery than the price of 1.5 yuan / kW, the battery price was 34,000 yuan. Even so, electric cars than gasoline cars to save fuel costs each year about 1 million, 3 to 4 years to offset the cost of the battery.
For rechargeable hybrid vehicles, Wang Binggang clear that, plug-in hybrid technology to extend the driving range of electric vehicles, which usually use electric drive, while driving long distances into the hybrid state, is very suitable for China The.
Experts from Tsinghua University Professor Song Jian Wang Binggang endorsed the view, he also believes that the most promising applications of electric vehicles is the plug-in, because it greatly reduces the battery capacity.
Professor Song Jian analysts say China's current electricity and oil units of energy from the perspective of almost the same, gasoline is 6 yuan / liter, electricity is 0.5 yuan / kWh, 12 kWh basically in 1 liter of oil, energy are equivalent. But electricity is a secondary energy, it is used in the car can reach 80% conversion efficiency, compared to 12% fuel conversion efficiency of 16%, almost 5 times the difference. In the premise of equal energy consumption to 20% of the price to obtain the same effects with petrol vehicles is the plug-in car selling point, that the cost of its use significantly declined.
Song Jian, also pointed out that commercial development of electric vehicles is still a major bottleneck in the cost. At the same time, high-performance motor and controller unit price of power is basically 3 times the price of the current internal combustion engines, but also hinder the commercialization of electric vehicles, the main factor. In addition, like braking, steering, air conditioning and other electric vehicle-specific parts, which company has yet to develop a sophisticated use of compressed air in the vacuum booster system, the electric car air-conditioning there are voltage matching problem, these are the electric car industry to make efforts to solve the process.
Song Jian that the lithium iron phosphate stands to reason that the cost than lead-acid battery is lower, its target price should be three to five cents one kwh, now a key factor restricting its development process is due to low yields caused by premature . Song Jian said that if the yield of lithium iron phosphate can be increased to 90%, will reduce the cost of making it to the current one-twentieth or so, its prospects will be very bright.
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