New energy lithium power battery facing the "challenges"
The development of new energy automobile industry boom, but also promote the power battery industry has entered a new development climax. But what is the limit ...
The development of new energy automobile industry boom, but also promote the power battery industry has entered a new development climax. But what is the limit of new energy lithium-ion battery?
1. Do we have to use lithium batteries all the time? Will there be other batteries to replace lithium batteries?
This is the sustainable development of power battery technology.
Lithium power battery is a new type of high-energy battery successfully developed in the 20th century.best lithium ion battery machine company It was put into practical use in the 1970s. Due to its high energy, high battery voltage, wide operating temperature range, long storage life and other advantages, it is widely used in military and civilian small appliances, such as cell phones, portable computers, video cameras, cameras, etc.. , partially replacing traditional batteries. Large-capacity lithium batteries have been tried in electric vehicles, will become one of the main power sources of electric vehicles in the 21st century, and will be used in artificial satellites, aerospace, energy storage and other fields.
Power lithium batteries, the current stage of sales products market we can see the largest number of key power lithium batteries are iron phosphate lithium ion batteries, lithium manganate ion batteries,equipment for lithium battery assembly lithium cobaltate ion batteries and ternary lithium ion batteries. Tesla car technology application of power lithium battery is a ternary lithium battery, it is the main characteristic is the best one, but its safety research is not stable.
From the perspective of sustainable development of the battery industry, lithium-ion batteries will dominate by 2030. Rough prediction, the first generation of all-solid-state batteries (industrialized) market share will be close to 1% around 2030 point in time. 2035, a new generation of solid-state batteries and potassium, magnesium, sodium, lithium-sulfur batteries will enter the market. By 2050, liquid lithium-ion batteries could be reduced to about 20%.
2. What people are still not too happy about electric cars is that charging is not as fast as refueling.
Many users complain that the battery life of electric vehicles is not long. In fact, high-power batteries can be charged as fast as refueling, but their specific energy is low and can't meet long-range requirements.
Nowadays, there are more and more long range EVs, and all of them emphasize energy-based power batteries with high specific energy, and fast charging is not easy. For example, 350 kW ultra-fast charging, 5-minute charging close to 30 kWh, or to solve a lot of problems: charging rate is too large, the battery can not stand; charging current is too large, the car can not stand; charging power is too high, the grid can not stand.
To this end, the battery itself should have fast-charging capability, that is, a higher peak charging multiplier; vehicle electrical system voltage should be increased, such as increasing to 800 volts in order to reduce the total charging current in the ultra-high-power charging; the best use of energy storage battery discharge to achieve 350 kW of high power to reduce the load on the grid. This will facilitate ultra-fast charging.
One of the most difficult things is the fast charging capability of the power battery itself. The main reason is that rapid charging leads to the formation of lithium dendrites, resulting in internal short circuits. For this reason, in addition to the need to develop lithium-free fast charging technology, it is also necessary to select the range and scope of ultra-fast charging.
Studies have shown that below half of the power, 5 minutes to charge 1/3 of the power is more appropriate; full power will encounter security, life, heat and many other problems, the loss outweighs the gain.
3. Power battery continue to go lithium direction or to other directions?
The first stage of the country's development of HEV, PHEV, the second stage of the development of BEV, the third stage of the development of FCV, "hybrid stage of the basic task is to solve the problem of automobile energy saving, its energy-saving limit is the energy saving is 50%; pure electric power is the basic task of solving the problem of automobile tailpipe emissions (PM2.5), the limit of which is 0; the basic task of the fuel cell vehicles is to improve the range of pure electric vehicles, the basic goal to reach 250 kilometers, the ideal goal to reach 5,000 kilometers."
In the face of many bottlenecks and defects, China's power battery enterprises should increase the research and development of the core technology of power batteries, enhance the ability of independent innovation, overcome the technical difficulties, and make the enterprise brand bigger and stronger. Enterprises not only need sales performance, but also technology investment. Only by increasing R & D efforts, the later can be bigger and stronger.
At the same time, in the face of overcapacity, enterprises in the continuous expansion of production capacity at the same time, battery manufacturers should also increase technical research and development efforts. Because since all companies are blindly expanding, if your product is first-class, high-quality, long-term, safe and reliable, the garage is more willing to buy your battery, users can rest assured that sales will naturally rise.
4. Reasonable layout of production capacity is the way to go.
At present, China's production capacity does not lag behind other countries, but how to establish high-quality production capacity, and make these capacities more reasonable to play a role in the current business needs to consider the issue. Power batteries in the quality of the basis, already have a large-scale commercialization of the foundation, and the next to deal with large-scale commercial development and the surge in market demand, although should not be blindly expanding, but the production enterprises should also do a good job of capacity reserves.