Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

Single chip microcomputer STM32L151CCU6

inductance

SMD aluminum electrolytic capacitor

This term should not be unfamiliar to consumers around the world. After all, almost all car manufacturers are now launching or developing new energy vehicles, which are mainly driven by electric vehicles and are divided into pure electric vehicles and hybrid electric vehicles. However, in addition to changing the way consumers use cars, the cruising range and charging time are the biggest problems.

At this year's Geneva Motor Show and Shanghai Auto Show, there was a new energy vehicle brand, Zhengdao Auto, which is dominated by graphene batteries.

From the data point of view, in addition to the right road H600 unveiled at the Geneva Motor Show, the original road K750, K550, the cruising range has reached 1000KM, the kinetic energy recovery rate reached 30%, and the official said that the earliest can be sold to consumers in 2019.

In addition to the vehicle itself, the most important technology of the right car is that there is no graphene technology used by car companies. So where is this thing?

Graphene, a monoatomic planar film composed of carbon atoms, has a thickness of only 0.34 nm, and the thickness of a single layer is equivalent to one-fifth of the diameter of the hair. It is the thinnest and hardest nano material known in the world, with good light transmission and folding.

Since its inception, it has been regarded as a revolutionary energy storage material because of its strong electrical conductivity. According to the new national standard, its cycle life is more than 4,000 times, and the operating temperature range is from minus 30 degrees Celsius to minus 70 degrees Celsius. On the basis of ensuring a certain driving range, high current fast charging and long cycle life can be realized.

(graphene synthesis scheme)

For example, adding a small amount of graphene powder to some mobile phone batteries is enough to make the battery more durable in charge and discharge performance and cycle life than conventional batteries.

Why is such a powerful graphene not used so much?

The most direct cost is the problem. At present, whether it is a pure electric vehicle or a hybrid electric vehicle, most of them use lithium batteries, while lithium batteries are a small amount of graphene added to the conventional battery, and graphene is oxidized on the surface. The requirements in other aspects are too high, so the cost is naturally very high, and it is not generally high.

At present, the role of graphene in lithium batteries, one is the conductive agent, the other is the electrode embedded lithium material, the traditional materials used are conductive carbon and graphite, these two things are now sold in tons, and the price of graphene, casual Once you check it out, you will find how small your bank deposits are.

In addition, of course, it is a technical problem. Because the surface of graphene is greatly affected by the chemical state, it will lead to its stability and cycle life, followed by the conversion method. The commonly used wet etching transfer often brings wrinkles, impurities, damage and other problems. It is difficult to achieve large-scale transfer. Roll-to-roll technology, according to the practice of some domestic manufacturers, there are also many subtle but difficult to solve problems, and can not be used.

Of course, there are still many technical problems, which make the graphene battery difficult to achieve.

Can the dream of charging a thousand minutes of battery life be realized?

The answer to this question is yes, as we said before, the graphene battery is the most efficient battery in the future, while significantly reducing the charging time.

The graphene polycarbon battery can be charged with a large current of 10C, and the single block is fully charged for only 6 minutes, and hundreds of pieces are charged in series, and up to 95% in 10 minutes. Its power density is high, it can reach 200W/KG~1000W/KG, which is equivalent to more than 3 times of current lithium battery, which means that the cruising range can reach about 3 times of the current battery pack.

And from the current research results of the new graphene battery, after the battery is fully charged, it is short-circuited with a nail gun, and there is no reaction at all. Even if it is burned on fire, it will not explode. This plays an important role in ensuring the safety of the car.

Finally, let's talk back to the Zhengdao Auto. In addition to this year's latest concept car at the two international auto shows, and revealed some of the graphene battery technology, it is rumored that it has solved most of the graphite in the US dedicated graphene battery research center. The problem of mass production of olefin batteries.

In the end, whether the right car is really holding such a revolutionary technology, I don’t know it yet, but I can know that since the right car can talk, naturally there is a certain degree of enthusiasm. As it gets closer and closer in 2019, the answer is also Getting closer and closer to us.

Look forward to it, Sao years! "Charging for ten minutes, life for thousands of kilometers" may not really be a dream!