Now on the road, you will find more and more cars with green license plates. Yes, it is a new energy vehicle promoted in China. They include three categories, namely pure electric vehicles, plug-in hybrid vehicles and fuel cell vehicles. ?
Now on the road, you will find more and more cars with green license plates. Yes, it is a new energy vehicle promoted in China. They include three categories, namely pure electric vehicles, plug-in hybrid vehicles and fuel cell vehicles.
Seeing this, you may wonder, aren't these cars just electric cars? Why is it called new energy? People with knowledge of automobile history can point out that electric vehicles existed in19th century, but now they are called "new energy" in 2 1 century, which is really puzzling.
It can be seen from this that many people think that the current new energy vehicles are nothing more than replacing the internal combustion engine with motor control, and then replacing the fuel tank with batteries. To some extent, this is correct, but in fact, these are too far from the point. Because the technical point of new energy vehicles is not only how to charge more batteries, but also how to manage these batteries.
Let us take Tesla as an example. At first glance, this car actually has no technical content. It doesn't even make batteries. It just uses thousands of batteries bought as energy to generate electricity to drive the wheels to leave. This looks like a toy car, at most it is an enlarged version. But if you really think about it, you will find that things are not that simple.
First of all, on the battery, it is not an ordinary No.5 battery, but a Panasonic high-current battery. This battery can provide stronger current and endurance than other manufacturers, and the battery attenuation can also be well controlled. When it exceeds 200,000 kilometers, the battery performance is only attenuated by less than 65,438+00%, which is little affected by the weather and can maintain battery life even in winter.
I believe everyone who has driven an electric car knows what this concept is. For our battery car donkey, a set of batteries will almost be retired after three years of operation, but in Panasonic's view, this is only the beginning. So as far as the battery is concerned, it provides sufficient and continuous power.
Then in terms of battery management, Tesla can be said to be the best in the world. Its strength lies in: whether in software or hardware, it can ensure that the battery will not be in danger of overheating, fire, short circuit, uneven charging or even explosion and combustion. This is the most important thing for new energy vehicles.
At that time, when major automobile manufacturers were using lithium iron phosphate batteries, Tesla took the lead in using ternary lithium batteries. This kind of battery has higher energy density and can make the battery "lose weight", but the disadvantage is that the safety will be worse. So when Tesla solved the latter problem, the advantages ahead were obviously enormous.
Its car is equipped with thousands of batteries, and each battery is equipped with a fuse to avoid the short circuit of one battery in series and affect the work of all batteries.
In fact, if you look at some of Tesla's patents on batteries, you will know where its advantages are. Its related patents are mainly safety isolation, thermal management, electric balance and so on. These are all patents for controlling batteries, and there are no patents for manufacturing batteries.
Seeing this, you will understand that the new energy vehicle is not to modify the car and sell the fuel tank to you for a few batteries. Its core is how to control these batteries to achieve the purpose of safety and environmental protection.
According to the national "three-year action plan to win the blue sky defense war" in July last year, the production and sales of new energy vehicles in China will reach about 2 million next year, so it is very likely that you will be the next person to drive new energy vehicles.