What are the current technical bottlenecks in power lithium battery packs?

After decades of development, the industry technology of lithium batteries has reached a new height. In recent years, the acceleration of the development of electric vehicles has also promoted the upgrading of lithium battery technology, but the technical bottleneck of power lithium batteries is Obviously, the author will now briefly describe the current bottlenecks of power lithium battery packs; 1. Short endurance journey: As the skills continue to grow old, the endurance journey of electric cars with lithium-ion batteries as the power source has changed from the initial failure. When 100 kilometers were added to the 300 kilometers of the main stream at that time, the endurance of a single model exceeded 400 kilometers. However, there is still a certain interval compared with the 500 kilometers of the dry-fueled car. This question can be solved by multiple strings of single cells, but the negative question brought about is that the volume is too large, which makes it inconvenient for the car to travel. Second, the charging speed is slow: related to the short journey, but the slower charging of the lithium-ion battery pack is a greater restriction for electric cars to open. At normal speeds, the power lithium battery of electric cars is fully in demand for 4 to 8 hours. There are also sensitive rechargeable lithium-ion batteries that can be filled in 1 to 2 hours, but their negative effects are extremely large, the life span will be drastically reduced to 1/3 of the original, and the battery function will be significantly reduced. There are no such doubts for fuel cars, and the refueling time does not exceed 5 minutes, and safety and stability can be guaranteed. 3. The safety function needs to be improved: Since the birth of the lithium-ion battery pack, safety questions have always confused customers. From mobile phones, laptops, to today's electric cars, safety accidents continue to occur. Except for the electric cars of Nissan and Tesla that have not yet been reported on fire, the electric cars of Zotye and BYD in my country, GM and Fisker in the United States all have spontaneous combustion or fire. Fourth, the improvement of charging technology: the battery imbalance caused by the multi-string and multi-parallel lithium power battery during charging is a major killer of the failure and life of the lithium battery, and it cannot be accurately and effectively effective for each unit cell of the battery pack. The monitoring and correct equalization current output is a major technical problem to be solved for power lithium batteries. At present, the consistency of batch batteries is still needed to determine the life length of lithium batteries. In theory, these are It can be solved by charging. In short, the above points are the biggest technical bottlenecks encountered by power lithium battery packs, as well as the biggest technical problems of power lithium batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the difference between polymer lithium ion battery and lithium battery