I. Short Driving Range: With the continuous maturation of technology, the driving range of electric vehicles powered by lithium-ion batteries has increased from less than 100 kilometers to the current mainstream of around 300 kilometers, with some models exceeding 400 kilometers. However, this is still somewhat behind the current mainstream driving range of 500 kilometers for gasoline-powered vehicles. This problem can be solved by using multiple individual battery cells in series, but the downside is that the size becomes too large, increasing the inconvenience of driving.
Power polymer lithium-ion batteries
Second, slow charging speed: While the driving range is short, the slow charging speed of power polymer lithium-ion batteries is a greater constraint on the development of electric vehicles. Battery Home's analysis found that at normal speeds, it takes 4 to 8 hours to fully charge the power lithium battery of an electric vehicle. There are now fast-charging lithium-ion batteries that can be fully charged in 1 to 2 hours, but the negative impact is huge. The lifespan will be reduced to 1/3 of the original, and the battery performance will be significantly reduced. Gasoline cars do not have these problems. Refueling time is less than 5 minutes, and safety and stability can be guaranteed.
III. Safety Performance Needs Improvement: Since the advent of lithium-ion batteries, safety issues have plagued consumers. From mobile phones and laptops to today's electric vehicles, safety incidents continue to occur. Apart from Nissan and Tesla electric vehicles, which have not yet been reported to catch fire, there have been incidents of spontaneous combustion or fires involving electric vehicles from Zotye and BYD in my country, and from GM and Fisker in the United States.
