Lithium battery life and new energy technology -Lithium - Ion Battery Equipment

Lithium battery life and new energy vehicle technology -Lithium - Ion Battery Equipment

Discussion on Lithium-ion Battery Life and Technical Bottleneck of New Energy Vehicles

With the rapid expansion of new energy vehicles, every car manufacturer has also seen the development prospects of electric vehicles. Many manufacturers have begun to test and launch electric vehicles. But now, electric vehicles still have some problems to be solved, such as slow charging and short life. journeys, etc., but in these matters, it is often easy to overlook the important issue of customer EV battery life. But there seems to be a workaround.

Salt bath method for longevity

In a report published yesterday, CSIRO said scientists at the organisation had developed an easier way to extend the life of rechargeable lithium-ion batteries, known as a salt bath.

CSIRO, in collaboration with RMIT University and Queensland University of Technology, discovered the method. According to the CSIRO researchers, their material is an ionic liquid, also known as room temperature molten salt, a common liquid that is transparent, colorless, odorless, flame-retardant and forms a protective film on the outside of the electrodes, to keep the battery stable. The process and principle of battery processing are as follows: Before battery assembly, the lithium metal electrodes are immersed in a mixed electrolyte containing ionic liquids and lithium salts. After such treatment, not only the service life of the battery can be prolonged, but also the service life of the battery can be prolonged, and the performance and safety of the battery can be improved to a certain extent.(Lithium - Ion Battery Equipment)

Lithium-ion battery life

At this stage, various manufacturers test the development of electric vehicle batteries, which are basically batteries (importantly lithium-ion batteries) and fuel power cells, fuel power cells, due to the high development cost and maintenance cost (the maintenance cost of fuel power cells is About three to four times the battery), it is not suitable for the development of electric vehicles at this stage. So let's put aside the widespread use of lithium-ion batteries for a moment.

Lithium-ion batteries in electronic products are generally used for 5 to 20 years, with an average of 8 years. At the current state of technology, lithium-ion batteries in electric vehicles can only last three to five years. When the battery capacity of electric vehicles decays to less than 80% of the original capacity, the continuous driving distance of electric vehicles will be significantly shortened. When the battery capacity decays below 70%, the battery must be replaced. For many of today's pure electric vehicles, the cost of the battery is about 40% of the total cost of the car, which means that replacing the battery is equivalent to half the cost of a small car.

The reason for the short life of electric vehicle batteries is nothing more than the influence of the working environment and a large number of charging and discharging.

In terms of working environment, electric vehicle batteries work under high or low temperature conditions, which will affect the life of lithium-ion batteries. Generally, this effect is beyond human control. After all, the external environment of driving gives very little choice.

In terms of charging and discharging, there are basically two charging methods for electric vehicles: household charging piles and charging piles. Taking Tesla as an example, the most famous electric car in the world now, Tesla's super charging, can half the car's electricity in 20 minutes, the charging peak can reach a charging speed of 500 kilometers per hour, and the charging power can reach 120 kilowatts. .

The impact of this on battery life is still not small, the recession, according to foreign statistics on Tesla's efficiency of battery decline 10,000 kilometers down about 1%, if long-term use of fast charging efficiency will be faster, and most, Including the decay of the Tesla electric car's in-plant battery is not covered under warranty, so the impact of battery life on the car meets the user's attention.

future development

In the development of new energy vehicles, high-end energy sources such as fuel power cells are definitely a trend in the future, but with the existing technology, lithium-ion batteries are indeed the most suitable choice. Although the slow charging speed and short battery life are urgent issues, the decline of the battery cannot be ignored, even more important than the first two, because it can be said to directly affect the life of the car. If CSIRO's research results can be applied to practice, it will play a huge role in promoting the development of lithium-ion battery vehicles.



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