What is the role of large capacitors on electric bicycles?-industry-news

The central issue: the reality of electric bicycles, the advantages of large capacitors on electric bicycles and the application of power stations in super-capacitor electric bicycles

The large capacitor has a large specific power, and its characteristics are: when charging, the charging amount is large, and the charging is fast; when discharging, the discharge amount is large, the discharge is fast, the climbing is strong, and the battery is 30 times larger than the lead-acid battery, which is the most important electric vehicle performance. Ultra-large capacitors are more powerful than electric ones. They are also used on electric bicycles. For example, starting, accelerating, and climbing require large currents, and ultra-large capacitors allow large current discharges. Lead-acid batteries are not allowed to be charged with a large current. Once the lead-acid battery is discharged, the battery pack will be vulcanized and the battery life will be shortened.

First, the reality of electric bicycles

“In 1998, electric bicycles began to have output statistics. At that time, 16 companies were counted nationwide, and the annual output was 58,600.” Fenghe Wang, chairman of the China Bicycle Association, recalled: “From 1998 to 2007, only 10 years, electric Bicycle production reached 21.3 million units, an average annual increase of 43.2% and the number of bicycles has reached 65 million in the past 10 years."

In the past 10 years, both in terms of products and production process equipment, quality improvement and technological progress have been reflected. In terms of products, the service life of lead-acid batteries has generally increased; the production technology of brushless high-speed motors independently developed by a group of companies such as New Ocean has gradually matured and has been more adopted in the whole vehicle; high power and high torque The motors with shifting gears have also been successfully developed, which laid the foundation for the development of electric motorcycles in the future. At the same time, the scale of the industry has also been continuously improved. The number of enterprises with an annual output of more than 100,000 has reached 46 and the annual output accounts for 46. The national total is 46.08%.

“Because the quality of the products has been guaranteed, the technical requirements have reached the level of developed countries. In 2007, China exported 350,000 electric bicycles, of which the number of exports to Japan, the United States and the European Union reached 203,300” Fenghe Wang said.

According to the design of the "China Economic Report" research group, by 2010, China's electric bicycle production and sales can reach 30 million. The export volume can reach 5 million to 6 million. The industrial output value of 70 billion Yuan, the overall scale of upstream and downstream industries will reach 130 billion Yuan. At present, China has become the world's largest producer, consumer and exporter of electric bicycles.

Second, the advantages of large capacitors on electric bicycles

1. The super large capacitor is green energy (activated carbon), which does not pollute the environment; the lead acid battery pollutes the environment.

2, the advantages of ultra-large capacitors: the life is particularly long, the number of cycle life is 3000 to 5000 times; the number of cycles of lead-acid batteries is only 300 to 500 times.

3, the charging speed is particularly fast: electric bicycle can be full in 2 to 3 minutes; lead-acid battery takes 5 to 8 hours. Large capacitors can be deeply discharged and can be charged at high currents; lead-acid batteries are not allowed to be deeply discharged, and large currents are not allowed to be charged.

4, the price of ultra-large capacitor: a little higher than the lead-acid battery (high 1/3), the life is five times higher than the lead-acid battery. The price of lithium-ion batteries is three times higher than the price of ultra-large capacitors.

5, the size of the large capacitor: according to the existing standard electric bicycle battery box size custom, the general electric bicycle battery box, large capacitors can be put in.

6. In the electric vehicle enterprises, no one has installed a large capacitor, and it is a pioneering work to install an oversized capacitor on an electric bicycle.

7. Super capacitors are completely maintenance-free compared to lead-acid batteries. Super capacitors do not require people to manage and maintain. Lead-acid batteries require human management and require people to care. Large capacitors can operate from -30 ° C to -40 ° C, and lead-acid batteries are basically inoperable at this temperature.

8. Super capacitors recover up to 75% of electrical energy in terms of braking energy and downhill potential energy; lead-acid battery energy recovery is only 5%. This energy recovery of ultra-large capacitors can save a lot of power.

9. Super capacitor charging and discharging efficiency is up to 98%, lead-acid battery charging and discharging efficiency is as low as 70%, and the difference between the two is close to 30%, which means that energy can be saved by about 30%. At the critical moment of energy saving and emission reduction, this is A very important indicator.

Third, the super capacitor has two characteristics

First, the super capacitor is particularly large in power, which is its advantage; the second is that it is particularly small in energy, which is its disadvantage.

Ultra-large capacitors and lead-acid batteries are mixed externally to extend the service life of lead-acid batteries by one to three times.

Fourth, the application of power station in super large capacitor electric bicycle

The ultra-large capacitor is smaller than the energy, and its characteristics are: the same weight super capacitor has a short driving range and is not far away; but the charging speed is fast, which can make up for the shortcoming of the short driving range. The establishment of the power station in the whole city is the most difficult to solve this defect. Good method.

The addition of power electric vehicles and power stations is an important concept to promote the development of electric vehicles in the country. To achieve this concept, it is necessary to establish a charging station featuring ultra-large capacitors based on its good practice; charging speed is 2~3 Minutes, 2 to 3 kilometers between stations, establish a charging network by lease. The biggest feature of ultra-large capacitors is that they have long life and fast charging speed. The network built by leasing is not only convenient for consumers of electric bicycles, but also for national energy conservation and emission reduction.

The price of a large capacitor is also a major factor that it cannot be quickly promoted. Adding power stations can also solve the problem of expensive capacitors. Because the longer the driving range, the more raw materials are used, the more expensive it is. For example, the design driving range is 20 kilometers, the price is 600Yuan / set, if the driving range is 10 kilometers, the price can be doubled. Therefore, designing the appropriate driving range is the key to determining the price.

Fifth, Prospects for the application of ultra-large capacitors in electric vehicles

1. The rising world oil prices have become the focus of discussion by the people of the world.

2. The world's oil is limited. According to experts' estimates, oil resources will be exhausted after 30 to 50 years of redevelopment.

3. The world's energy is mainly based on oil. Now it is gradually turning to electricity. For example, the train used to be mainly coal, and then diesel. The main use of electricity is now electric trains.

4. Nowadays, the world's vehicles are mainly used for automobiles. In the future, they must be electric vehicles, and they are the world of electric vehicles! Now the world is full of gas stations, and the world must be everywhere to add power stations!

5. There are electric cars, followed by the inseparable super large capacitors.

Sixth, several reasons why electric cars cannot be separated from large capacitors:

1. The excess energy of the vehicle can be recovered;

2. The charging and discharging rate of super large capacitor is as high as 98%, almost 100%;

3, ultra-large capacitors have a very long life and can be used for 5 to 10 years;

4, charging and discharging speed is very fast (2 to 3 minutes can be full);

5. Super capacitors are green energy sources.

The page contains the contents of the machine translation.