And-coming new energy storage device - super capacitor
In Shanghai, running a successful commercial demonstration of 11 road super capacitor bus, the core components emerge in China in recent years, a new energy storage devices --- a super capacitor. Then, the super capacitor anyway? On Haiao Wei Technology Development Co., Ltd. is the product R & D units and, therefore, to obtain product patents. The company's chairman-hua LI, said: "Beating a popular example, the super capacitor is like a physical battery. Usual capacitance, is charging a long time, instantaneous discharge. Ordinary chemical battery power is small, short life cycle, can not be used to train . while a large number of super-capacitor can be quickly charged, continuous discharge, to meet the needs of the tram road. "
Tsinghua University, Mr. Wang Yanchao descriptions are more professional, he said, super capacitor is "an electrochemical device is a capacitor between the battery and the transition between the normal components. Its charge-discharge process is highly reversible, can be highly efficient fast ( second level) charge and discharge. "Yan Wang said, the past, because super-capacitor specific energy is too low, discharge time too short to be used in the automotive sector. With the rapid development of super-capacitor technology, which has become the automotive research and application of new hot spots. Super-capacitor is not only suitable for use in automotive engine start, power steering and other systems supporting the energy, but also with the batteries, fuel cells for electric vehicles with auxiliary energy, thereby increasing battery life to make up for shortage of fuel cell than the power of the shortcomings, also to maximize the recovery of braking energy and so on. In short, its in the automotive sector has a very broad application prospects.
China Electrotechnical Society of Professional Committee of experts in electric vehicle Wangjia Shan and Wang Hai-Jie pointed out that the super capacitor is a late 20th century, 70 the emergence of a new product. It breaks through the traditional design concept of capacitance, electrical capacity by the micro-level to Farah Farah level, then, already have the super capacitors 1000 Farah level. The 20th century, they have emerged 10000 ~ 100000 Farah-class traction super capacitors, from super-capacitor battery applications entered the market, and the emergence of a new super-capacitor electric car concept. Super-capacitor defect is smaller than the energy, run very far, but the charging speed and the ability to establish charging stations in the city by way compensate for this defect, so that driving range can be extended.
Experts said that the super capacitor bus has many advantages, such as:
Super capacitors are green energy, not pollute the environment; chemical batteries, secondary pollution to the environment.
Super capacitor long life cycle of about 10 million times; chemical battery cycle life is short, generally only 200 to 1000 times, easy to damage.
Super capacitor charging speed, the chemical battery charging time is relatively long.
Super capacitor charging and discharging efficiency (98%); chemical battery charge and discharge efficiency of only 70%.
Super-capacitor high power density can reach 1000 ~ 10000W/kg; chemical batteries, power density is only 300W/kg.
Super-capacitor can be done completely maintenance-free, the working temperature range of -40 ℃ ~ 50 ℃, and the capacity of change is small; lead-acid battery electric vehicles -40 ℃, the driving range by 90%, a super capacitor is only reduced by 10%.
Super capacitor bus braking energy recovery rate can reach 40% ~ 70%; chemical battery-powered buses is only 5% of the energy recovery.
Super capacitor is relatively low cost. Super capacitor prices have more than one times higher lead-acid batteries, but because of the life of a super capacitor more than 10 times higher than the chemical batteries, so the integrated super capacitor bus operating costs, much less than chemical batteries.
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