Jinhua First Middle School teacher invents "solar car" to run 20 kilometers more than a week

Ding Yiming, the first middle school professional teacher in Jinhua City, has a cool car. It is similar to the tourist car in the scenic area. It is a four-wheeled battery car. Some people say that there is something weird about this? Go to tourist attractions to play everywhere. However, his car is different, the roof is a solar panel, from the top down, dark one.

“The roof is converted into a solar panel, which can generate electricity, and electricity can directly translate into the motive power of the car.” When there is sunlight, Ding Yiming puts his car in the open air to enjoy the sun. There is a steady stream of free electricity.

One week, full of solar energy, can open 20 kilometers more

Four years ago, Ding Yiming was interested in homemade solar cars. "Solar energy is a clean energy source." He is an environmentalist and a teacher in the school to teach machinery manufacturing. He found that people around their own real use of solar power generation is rare. "It is not difficult to install solar panels in vehicles. It is because the cost is too high. In 2007, the price of a solar panel of one or two square meters was as high as six or seven thousand yuan."

Now that it is much cheaper, the original six or seven thousand yuan is worth more than 2,000 yuan. He felt that the price was affordable, and he said he would do it. He bought a golf cart from a factory in Bailongqiao and went to a new energy technology company on Binhong West Road to buy a solar panel.

He lifted off the original tin roof and replaced it with a solar panel of almost the same size. It can not only shelter wind and rain, but also collect solar power. With a few plates, the solar panels on the roof are connected to the six batteries under the seat.

On December 2, the reporter arrived at Jinhua No. 1 Secondary Vocational School located in Luodian Town, Lucheng District.

In the open space on the school gate, the reporter recognized Ding Yiming's solar car at a glance and it was bask in the sun. The solar panel on the roof is very eye-catching. Like the popular “small electric run” nowadays, two people can sit in the car. Every day, he drives this trendy car to work. About 12 kilometers back and forth, the top of the electric board, but also open side charging.

The body is white. There is a few words on the front: "solar test". Mr. Ding’s idea is really very hot. Many years ago, some people wanted to develop solar-powered cars, especially the current era of high oil prices. This idea, Ding Yiming has been put into effect.

The reporter climbed into the car to test drive. The operation of this car was very simple. Apart from a steering wheel, the foot was a throttle, a brake, and an automatic transmission. When you step on the gas pedal, the power is very strong and the acceleration is fast.

However, Ding Yiming's car also has many bottlenecks. This solar panel still cannot be used as a major source of power. The six batteries under the seat are the main power. Solar power can only be used as an auxiliary power source. The significance of solar power is: "Every week, I only need to charge one battery. With full power, I can run about 80 kilometers. If there is no solar assistance, I can run 60 kilometers." That is, the weekly solar energy can give this The car provides 20 km of electricity.

Ding Yiming said that Jinhua’s latitude is relatively high, the sunlight is not strong enough, and there are more fog days. If you arrive in Hainan, the effect will be better. You may be able to drive 100 kilometers.

The size of the solar panel in the car is 1.06 meters by 1.54 meters, and the output voltage is 60V. "The larger size will provide more power, but you have to consider the stability and safety of the car. You can't be too big." The car costs about 30,000 yuan and its top speed is 35 kilometers per hour. Ding Yiming said that the motor on the car is 3000 watts. The energy conversion rate of solar panels is only 18%, and the laboratory can achieve a conversion rate of 27%, which is still too low.

He believes that solar energy can only be used as an auxiliary energy source for vehicles. The bottleneck of solar vehicles still needs to be broken. The use of photovoltaic electricity by ordinary people does not seem to be worthwhile. There are also many technical problems.

Making solar cars, where is it difficult?

Is solar energy really hard to use as the main energy source for vehicles? The reporters found Ding Yiming, a company that purchased solar modules, Zhejiang Desheng New Energy Technology Co., Ltd.

According to an analysis by engineer Liu Changjiu, solar energy in Zhejiang is not a very good natural condition. The average daily sunshine time in Zhejiang is 3.5 hours and that in Qinghai is 4.5 hours. In addition, solar panels used in small cars cannot be made large. The conversion rate of solar energy into electricity is only 18%, and the amount of electricity provided is indeed limited.

Liu Changjiu said that the cost of solar power is still too high. For example, solar generators for home use require an area of ​​20 to 30 square meters and 7.8 million yuan. Although the country is vigorously promoting photovoltaic power, photovoltaic power generation projects can receive 70% of financial subsidies, but the personal financial subsidies are not yet in place. At present, most solar modules produced by Desheng are exported to foreign countries. According to analysts in the industry, it should be said that from the perspective of domestic applications of solar energy, compared with foreign countries, the overall promotion has been poor.

At present, the only way to increase the amount of power generated is to increase the area of ​​the electric plates and optimize the motor. Is solar roofing reliable? “Absolutely no problem. This kind of solar panel can last 10 to 20 years. People can stand on it and it won’t be bad. Even if it is under the ice, it’s not bad. The working temperature of solar energy is minus 40 degrees Celsius. To 85 degrees Celsius," said Liu Changjiu.