After decades of development, the lithium battery industry technology has reached a new height, in recent years, the acceleration of the development of electric vehicles at the same time also pulled the lithium battery technology upgrade, but the technical bottleneck of the power lithium battery is still very obvious, now I will briefly describe the current bottleneck of the power lithium battery pack.
A short range journey: With the continuous aging of skills, lithium-ion batteries as a power source of electric cars range journey has been added from the initial less than 100 kilometers to the mainstream of about 300 kilometers, a single model range journey exceeded 400 kilometers. However, there is still a certain distance between its fuel cars when the main stream travel journey of 500 kilometers. This problem can be solved by multi-string single cell, but the negative question is the volume is too large, increasing the car marching inconvenience.
Second, the charging speed is slow: related to the journey is short, but the lithium-ion battery pack is slower to charge the electric car to open a greater constraint. At normal speed, the electric car's power lithium-ion completely cloth full demand 4 to 8 hours. Now there are also sensitive rechargeable lithium-ion batteries, can be filled in 1 to 2 hours, but its negative impact is great, life span will plummet to the original 1/3, and battery function will be significantly reduced. Fuel cars do not have these questions, refueling time is not more than 5 minutes, safety and stability can be guaranteed.
Third, the safety features to be improved: since the birth of lithium-ion battery pack, safety questions have always confused customers. From cell phones, laptops, to the current electric cars, safety accidents continue to occur. In addition to Nissan and Tesla's electric cars have not been reported on fire, China's Zotye and BYD, the United States of GM and Fisker's electric cars have spontaneous combustion or fire operations.
Fourth, the improvement of charging technology: multi-series and multi-parallel lithium power battery in the charging of the battery imbalance is a major killer of lithium battery failure and life, can not be accurate and effective for each cell battery pack to effectively monitor and correctly equalize the current output, is currently a major technical problem to be solved for lithium batteries, at present, the consistency of the battery cell to determine the life of lithium batteries Length, and theoretically, these can be solved by charging.
In short, the above points are the biggest technical bottlenecks encountered by the current power lithium battery pack, but also several of the biggest technical problems of the current power lithium battery.
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