Stronger than LiFePO4 batteries? Gree titanium battery confirmed: 90% charge in 10 minutes

A battery is a device that converts chemical energy into electrical energy. It is divided into positive and negative poles. In short, it is a device that can be used to store electricity and provide continuous charging for a certain period of time with a stable current. The more common batteries in our life are dry batteries, lead batteries, lithium batteries, etc.

Dry batteries, also known as manganese-zinc batteries, do not have a high voltage and do not produce more than 1 amp of current. The lead-acid battery can be used repeatedly and has a very small internal resistance, so it can be used to power the engine of the car. Lithium batteries, especially lithium iron phosphate batteries, have large storage energy and good charging effect. But there is another battery that claims to be better than lithium iron phosphate batteries, what is it?

1. The problem of energy storage battery life is worrying

At present, the development of automobiles is showing a rapid upward trend, but the battery life of electric vehicles is definitely a major bottleneck. For electric vehicles all over the world, 500 kilometers is definitely a big mark. Even if some manufacturers can exceed this limit, it must be exchanged for high prices. As a world-renowned battery manufacturer, BYD can hardly solve the problem of battery life at fixed costs.

Japan's Toshiba has already started to compete with BYD, and they have launched a new generation of lithium batteries. This lithium battery uses ether oxide and lithium titanate as positive and negative electrodes. This kind of lithium titanate battery has a very high energy density, and the storage capacity is more than twice that of the current lithium battery. It supports rapid charging and can be fully charged to 90% in 5 minutes. This kind of lithium titanate battery does not decay by more than 10% under the condition of 5000 times of charge and discharge, so it has a very long life. It can be used for 14 years if it is charged and discharged once a day.

2. The safety of energy storage is worrying

It took about a year for the report to be released after an explosion at a grid energy storage project in the U.S. in 2019. The report shows that the cause of the explosion was a battery failure, and the failure to put out the fire in time led to the accident.

In 2021, more than 30 fire incidents caused by energy storage explosions occurred in South Korea. Although no casualties were caused, the economic losses caused by the accidents were as high as 440 million won. The process of analyzing and investigating the accident in South Korea also took two years. It can be seen that the problem is not in external supervision, but in the source, that is, in the battery.

3. Gree, the Terminator of Security Issues

As early as around 2016, there was news that Gree would acquire Zhuhai Yinlong Titanium Battery Company at a price. It seems that Gree has long seen the inadequacies of ordinary batteries and has made adequate preparations early on.

Recently, Gree Titanium communication base stations have begun to be constructed in high-altitude areas, and this base station uses lithium titanate batteries. Compared with ordinary lithium iron phosphate batteries, this kind of battery has a longer service life, and does not require special maintenance during the entire use cycle, charges quickly, is more resistant to cold, and can maintain continuous power supply in low temperature environments.

In a program on CCTV, the program team lifted a Gree lithium titanate battery plate into the air, and then dropped it vertically downward. Gree's lithium titanate battery fell heavily on the floor, and the floor was already There are bumps and pits, but Gree's lithium titanate battery plate is intact.

Afterwards, destructive tests such as puncturing, water immersion, drilling, and burning were performed on the lithium titanate battery plate. As a result, the lithium titanate battery plate did not have any safety failures. This is because Gree's lithium titanate battery uses special materials, and a poor-quality SEI film will not be formed inside the battery. In this way, it fundamentally solves the possibility of fire and explosion due to the problem of battery heat dissipation.

4. The application of lithium titanate battery

If lithium batteries are applied to the field of electric vehicles, the biggest obstacle may be the charging and discharging and energy density of batteries. In the field of new energy vehicles, the battery energy density of pure electric vehicles should be at least 90Wh/kg. The energy density of lithium phosphate batteries and ternary lithium batteries far exceeds this standard. As a result, the development and application of lithium titanate batteries has become imminent.

In Zhuhai, Guangdong, my country, there is a new energy company. All of their buses are pure electric, and they are all charged in the company's charging area. The bus is parked under the charging facility, the special jacking device descends, and after connecting with the receiving device on the top of the bus, the charging facility starts to charge the bus.

According to the data, the remaining power of the vehicle before charging was 33%, and the power rose to more than 60% after more than three minutes of charging, and the bus was fully charged with 99% of electricity in just 8 minutes.

For a large passenger vehicle like a bus, if we drive at a constant speed of 40 kilometers per hour, its cruising range can reach 115 kilometers. If you follow the normal bus mode, its cruising range is about 80 kilometers. As for the problem of charging the bus, the bus driver only needs to charge it when he is resting, which also fully reflects the advantage of fast charging of lithium titanate batteries.

However, lithium titanate batteries not only have the advantage of fast charging. It also has the advantage of a long service life. In the company's laboratory, there is a lithium titanate battery that has been charged and discharged for 7 years. Now the number of charge and discharge times has exceeded 35,000 times. After almost 6 to 7 years, the lithium titanate battery has the capacity has been reduced by less than 10%.

At the same time, lithium titanate batteries also have a generous ambient temperature. Under the condition that the lowest temperature of the simulation test is minus 50 degrees Celsius and the highest temperature reaches 60 degrees Celsius, the discharge time of the lithium titanate battery can be stably and continuously operated, and normal charge and discharge can be performed.

Gree said that the lithium titanate battery can be recharged more than 25,000 times and requires almost no maintenance, and it does not need to replace the battery during the use cycle, which can save more maintenance costs.

Moreover, Gree's lithium titanate battery occupies an extremely small area, which is less than half of the lead-acid battery of the same capacity, which effectively saves the difficulty of construction and transformation of base stations. When the weather is bad, Gree's lithium titanate battery base station can also keep working normally.

Summarize:

From this point of view, Gree's lithium titanate battery is indeed better than lithium iron phosphate battery and other lithium batteries, and has played a crucial role in the development of my country's new energy industry and battery industry.

However, although the lithium titanate battery has many advantages in use, the biggest disadvantage of the lithium titanate battery is that its energy density is not high enough, and its battery energy density is less than the national standard. This means that in order to popularize the lithium titanate battery, it still needs further research and development to fully apply it to electric vehicles, which is a key point for lithium titanate battery to be improved at present.

However, the times are progressing, and changes are always good. Gree has taken a big step in human history by starting to build a lithium titanate battery base station. At the same time, I also expect Gree to work hard and contribute to the development of human civilization and technology. What do you think about lithium titanate batteries?