The term photovoltaic power generation will be familiar to you. In short, it is a new power generation system that uses the photovoltaic effect of solar cell semiconductor materials to convert solar energy into electric energy.

As an inexhaustible and clean energy, solar energy facilitates human life through solar water heaters, solar street lamps, solar power stations and other forms.

With the rapid development of new energy vehicles in recent years, can solar panels be used for the endurance supply of new energy vehicles?

The efficiency of solar power generation can not reach the ideal state

The efficiency of solar power generation is the main reason that restricts the application of this idea to the electric drive of new energy vehicles.

According to relevant experiments, the photovoltaic charging conversion efficiency is only 30%. In the case of sufficient light time, if the sunshine time is 10 hours a day according to the calculation per square meter, the power generation is 1.5 degrees.

The battery life of the new energy vehicles is only 15 kilometers per day. And 365 days a year, there will not be enough light every day, and there will be less power generation in cloudy and rainy days.

A pure new energy vehicles with an endurance of 520km can realize 20% to 100% charging process in about 1 hour under the condition of 400V voltage and 50KW km fast charging; Even if the household private charging pile is used, it can be charged to 100% power in 8 hours a night.

In contrast, solar panels have no practical significance for the endurance supply of pure trams.

The technical cost and maintenance cost are very high

If the roof and body are transformed into solar panels, the cost is also very high.

On the one hand, the use of solar panels on the body surface needs to be anti-oxidation and corrosion-resistant, and the larger the area, the higher the R&D cost and installation cost.

On the other hand, taking solar panels as the body, its service life is not high, and its anti-collision ability is far from reaching the strength and safety factor of metal body. There are great potential safety hazards for passengers in the car.

And even if there is a small collision, the maintenance cost of the solar panel will not be low, or there is no maintainability and it needs to be replaced directly. In this way, the maintenance cost is not a small expense.

It can meet the power supply of on-board low-power appliances

So can solar panels really not be applied to pure electric vehicles? Of course not. Although it can not meet the driving requirements, the power supply of other low-power on-board appliances can still meet the requirements.

The roof is equipped with a one square meter solar panel. Previously, we could store 1.5 kwh of electricity according to the lighting time of 10 hours a day, which is more than enough to meet the power consumption of low-power and low-voltage appliances such as car speakers, car fragrance, reading lights and atmosphere lights.

At present, some car companies have achieved mass production through the solar roof to meet the above low-power appliances. And in the future, when the conversion efficiency of solar cell technology is improved, it may be able to meet the requirements of air conditioning and other basic circuit equipment, which also improves the endurance from another point of view.

Write at the end

From the perspective of energy, solar energy is indeed a very ideal and zero pollution energy. However, the low energy conversion efficiency of solar panels is also a practical problem. Multi-angle thinking is also a technological progress to improve the endurance of new energy vehicles.