For the gift, start research and development of graphene batteries

Chapter 72 Localization of Materials

The most intuitive feeling is that under the same weight, the cruising range of your car is nearly double that of others.Of course, it may not be achieved in practice, but the difference will not be too much.

It is difficult for people who are not in the industry to understand the meaning of this number, but everyone present knows it.

First test the weight of the battery, and then measure the charge and discharge capacity. Although the charge and discharge capacity test takes a long time, almost more than 3 hours, everyone has no intention of leaving and has been waiting.

2480Wh/kg!

When everyone saw the result, they were stunned and couldn't believe the result!

We must know that the highest energy density of traditional lithium-ion batteries is 300Wh/kg, and now it has been directly increased to 2480, which is almost 8 times the level. It is definitely an epoch-making product.

This means that under the same quality, the use of carbon-based batteries will greatly increase the cruising range.

According to the current design concept of new energy vehicles, conventional models are also expected to reach the level of 5000 kilometers of battery life.

You know, the average mileage of a general family car in a year is about 1 kilometers.

A full charge can reach 5000 kilometers. If the limit is calculated, it will be enough to charge it almost twice a year.

Of course, in the actual use process, the temperature and usage habits are different, the working conditions are inconsistent, and the battery life will be reduced to a certain extent.

Even with a 7% discount at the worst price, the battery life is 3500 kilometers.In this way, it can be charged almost three times, which can meet the usage of the whole year.

It's not that I don't know, but it's a surprise. It's much more convenient than refueling to reach this level.

After all, a tank of fuel can run up to 600 kilometers, and if it is 17 kilometers, it will take about [-] refills.

It is not inconvenient to add oil so many times, and it is not a problem if it is charged three times.

Even, due to this ultra-long cruising range, the characteristics of the entire automotive industry will also change.

In the future, due to the increase in the mileage of a single charge, the number of charging piles may not increase significantly, after all, the number of charging is reduced.

Basically, under certain circumstances, concentrate on charging once.

The number of gas stations will be reduced to an extremely low level.

The amount of oil has been greatly reduced, and the amount of electricity used has continued to increase.I just don't know whether the existing available power can meet the requirements of a large number of trams in the future.

The internal resistance of the battery, 0.3mΩ.

This is beyond Jiang Ming's expectation, because according to Jiang Ming's estimation, it is normal within 0.6mΩ.

After all, it is normal for a battery with such a high energy density to have a larger internal resistance.

But the performance of the finished product was beyond Jiang Ming's imagination.

This kind of internal resistance performance is relatively excellent among traditional lithium batteries, especially for carbon-based batteries.

Next is a series of tests such as discharge current, charge current, and discharge rate.

Seeing the results come out one by one, needless to say, even Jiang Ming, whose expression remained unchanged, was very happy in his heart.

After all, it is very fulfilling to turn theory into reality and realize design goals.

The conventional performance test is completed, except for the life test, all tests are completed.

Jiang Ming looked at the collected data and nodded.

Then, he handed the data to Wang Mingyang.

Wang Mingyang looked at the pieces of data, all showing OK, and the smile on his face never disappeared.

"Good, not bad."

Wang Mingyang couldn't suppress the joy in his heart, so he praised.

Subsequently, emotions spread among the crowd, celebrating the birth of this epoch-making product.

At this point, in everyone's impression, it is basically considered qualified.

"Why, there is still a problem?"

Seeing that Jiang Ming was not as excited as he imagined, Wang Mingyang came over and asked in a low voice.

"It's okay, it's not that it hasn't passed all the tests yet, so we still have to be cautious."

Jiang Ming said.

Generally, a battery must pass routine performance tests and safety tests.

Now that most of the performance tests have been passed, it means that the performance of the battery meets the requirements, but it does not mean that there are no problems in the safety test.

Of course, security tests say that the impact is large and the impact is large, and that the impact is small or small, and so on.

In fact, whether the safety test can pass or not has a lot to do with the material of the battery.

At present, in Xia State, there are actually only two mainstream battery types: lithium iron phosphate batteries and ternary batteries.

Lithium iron phosphate batteries, how to say, have natural thermal stability.

Even if the battery thermal runaway occurs for some reason.Due to the stability of the material, the battery of lithium iron phosphate, at most, is smoking.

Of course, this is usually the case with a car battery that is really going to have a wide-ranging short, and what should burn is doomed to burn.

After all, the temperature during combustion is too high, and no matter how stable the material is, it will not be able to withstand such high temperatures.

As for ternary materials, compared to lithium iron phosphate, their stability is much worse.

An internal short circuit occurs in a certain battery cell, and under high probability, it will cause a chain reaction and cause a wider range of fire accidents.

In fact, this has nothing to do with the level of the battery cell manufacturer, it is purely determined by the characteristics of the material.

Jiang Ming often sees on the Internet that there are many water lovers advocating that whose battery is good and whose battery cells cannot burn.Claims to be a car that will never spontaneously combust.

He also gave an example, claiming that his battery has passed the acupuncture test, only smoke but not fire, and its safety performance is excellent.This proves that our own battery level is higher than that of our competitors.

Laymen watch the fun, and experts watch the doorway. Jiang Ming laughed when he saw this.

This is like comparing an egg or an iron to see who is stronger. I am not a good person, so there is no comparison.

You can say that the hardness of eggs is much worse than that of iron, and you can say that iron is better.However, this does not prove that chickens are not good enough to lay eggs as hard as iron.

This comparison, this requirement, is itself unreasonable.

Although the safety of ternary batteries is far from that of lithium iron phosphate, it does not mean that the technology of ternary batteries is backward and cannot be used.

In fact, ternary batteries are the most used batteries in electric vehicles.

In the field of passenger cars in Xiaguo, except for a few manufacturers, such as "blade" battery manufacturers, other companies basically use ternary batteries.

In the field of commercial vehicles and special vehicles, lithium iron phosphate batteries are most commonly used.

The high utilization rate of the ternary battery is actually related to its excellent electrical performance.

The platform has high voltage and high energy density, which can meet the requirements of small size and long battery life of passenger cars.

After all, no one wants to run more than 200 kilometers with such a large battery.

This is why performance determines the market demand. In many cases, it is not that the safer the product, the more marketable it is.

(End of this chapter)