What is the development of power battery technology?
The development of electric vehicles requires better batteries. The specific energy, life, safety and price of power batteries are crucial to the development of pure electric vehicles. Among them, lithium ion batteries with higher specific energy and long life are the most practical electric vehicle batteries.
Recently, the domestic power battery industry news broke frequently, first SAIC cut into the power battery sector, and the second largest domestic and the world's third largest power battery company Ningde era, the establishment of power battery system company; then there is news that BYD will be split The power battery division, open portal or supply to all car companies, has reported that this move may change the global market landscape. Moreover, the domestic electric vehicle market ranks first in the world for two consecutive years of production and sales, with a cumulative promotion of more than 1 million units, accounting for more than 50% of the global market. China surpassed the United States to take the top spot in the electric vehicle market. It can be said that the electric vehicle industry has unlimited prospects and rapid development. The key is the improvement of the power battery technology.
The development of electric vehicles requires better batteries. The specific energy, life, safety and price of power batteries are crucial to the development of pure electric vehicles. Among them, lithium-ion batteries with higher specific energy and long life are the most practical electric vehicle batteries, and are widely used in hybrid vehicles, pure electric vehicles and fuel cell vehicles. The current technical level of commercial power batteries and the expected goals for the next 10 years are shown in Figure 1. In actual product production, these indicators are often contradictory, and battery-related performance needs to be weighed. Improvement of battery performance requires consideration of the performance of electrode materials, electrolytes, and separators. At the same time, assembly technology, battery system grouping, and management technology follow-up are also crucial. This paper aims to summarize the current development of power battery with lithium-ion battery as the core from the aspects of battery material technology, single cell design and manufacturing technology, battery system technology, etc., and look forward to the future!