Power battery from lithium iron phosphate to ternary lithium battery pack system, the energy density has increased substantially, fuel cells and solid-state batteries are considered to be the future direction of development, in order to seize the high ground in the future, many vehicle manufacturers favor fuel cells.
Ternary lithium battery pack and hydrogen fuel cell comparison who has stronger safety
In the whole process of fuel cell vehicle operation, the fuel cell reactor is a place of chemical reaction. It only needs a constant supply of a small amount of hydrogen to work continuously, and if there is a hydrogen leak or safety accident, the path of supplying hydrogen can be quickly cut off to prevent the burning of hydrogen. As you can imagine, the most likely to affect the safety of fuel cell vehicles is the gas storage tank.
Compared with the ternary lithium battery pack, the safety of the hydrogen storage process should be higher, because the dangerous hydrogen can escape from the crowd quickly by isolating the oxygen or releasing it quickly, in a sense it is even safer than the liquid gasoline.
While the ternary lithium battery pack will age with time, there is a possibility of short-circuiting inside, or spontaneous combustion due to internal short-circuiting caused by external impact. The most terrible thing is that whether the spontaneous combustion is triggered from the inside out or the combustion is caused from the outside in, the process will release a lot of oxygen, which means that even if isolated from the air, the battery will burn more and more.
The advantages of ternary lithium battery pack
1, high energy density of the battery: the energy density of the battery is also the average unit volume or mass of electrical energy released by the battery. The greater the energy density of the battery, the more power stored per unit volume.
2, high power: the battery energy density is high, the same battery volume can hold more power. Battery capacity of 53.6kWh, and one point of power one point of range, which lays the foundation for ultra-long range.
3, high compaction density: compaction density is the mass per unit volume measured by the powder in the container under the specified conditions after compaction. Vibrational density or bulk density is defined as the mass of the sample divided by its volume, and this volume includes the sample itself and the sample pore and its sample gap volume.
Disadvantages: poor safety, poor heat resistance, poor lifetime, and poor high-power discharge. Poor safety and short cycle life are the main shortcomings of ternary lithium battery pack, especially the safety performance, which has been a major factor limiting its large-scale assembly, and large-scale integrated applications.
Advantages of hydrogen fuel cell
1. Compared with traditional fossil fuels, hydrogen fuel cells use electrochemical reactions, which only produce water and heat when providing energy. In contrast, traditional fossil fuels produce various toxic and harmful gases and dusts, which are a big weapon to pollute the bad environment and health.
2. Compared with other traditional batteries, hydrogen fuel cell is a power generation device, and the traditional battery only has the function of storing electricity. Hydrogen fuel electromagnetism, like a generator, directly converts chemical energy into electrical energy, which is much better than traditional batteries in terms of convenience.
3. The energy conversion rate of hydrogen fuel cell is high. The ordinary is that there is only 30% more energy conversion produced by combustion, while the energy conversion rate of hydrogen fuel cell reaches an amazing 80%. The loss of less resources to get more energy, that is certainly more cost-effective hydrogen fuel cells.
Disadvantages
1、The safety of hydrogen; although hydrogen is favored by the public as a new energy source in the future, the safety of hydrogen is still worth people's attention, although various studies show that the safety factor of hydrogen is higher than that of gasoline. But there are still many people think that hydrogen bottle is a hydrogen bomb, so the promotion of hydrogen fuel still needs to be vigorously promoted.
2. There are not many sources of hydrogen: Because the air of the earth does not contain much hydrogen, although hydrogen can be obtained by electrolysis of water, consuming electricity to produce hydrogen is not a very economical way nowadays. Of course, if the industry is scaled up, the cost will come down naturally, and there is still a long way ahead.
3、High technical threshold of hydrogen fuel cell: China's economy has been developing rapidly in these years, but many high-tech industries are still very weak, and hydrogen fuel cell needs absolute investment.
In China, the biggest advantage of the ternary lithium battery group is that in recent years, the national policy to encourage production capacity has been greatly developed, it can be said that Chinese companies are in control of its core technology, and leap to become the world's largest producer of lithium batteries, the cost has been greatly reduced, has fully formed a large-scale industry.
As for hydrogen fuel cell technology, whether it is the process formula of reactor catalyst or the core technology of gas storage tank, China has not formed a large-scale industry, so the cost is extremely high. However, China is very well equipped for the development of hydrogen energy industry. Every year, the domestic petrochemical industry produces enough hydrogen by-products for vehicle use, the cost of obtaining hydrogen is relatively low, and there is no need to rely on electrolysis of water, which is a high energy-consuming way to obtain hydrogen, which lays a good foundation for the large-scale development of fuel cell vehicles.
