The technical bottleneck of lithium battery pack

The key factors for Chinese electric cars to have a bad start are the cruising journey, charging speed and safety, all of which are caused by the poor technology of power lithium battery, so they can be regarded as the three technical bottlenecks of power lithium battery pack.

What are the technical bottlenecks for lithium-ion batteries?

I. short range: with the continuous improvement of technology, the range of electric vehicles powered by lithium battery has increased from less than 100 km at the beginning to about 300 km at the time of main stream, and the range of a single model has exceeded 400 km. But that is still a long way from the 500km that gas-powered cars must have travelled. This problem can be solved by a series of single cell, but the negative problem is that the volume is too large; increase the vehicle trek is not convenient.

Slow charging speed: compared with the short journey, slow charging of lithium battery pack is a bigger constraint for electric cars. At normal speeds, the electric car's lithium battery is fully charged for four to eight hours. Now also have agile rechargeable lithium battery, can be filled in 1 ~ 2 hours, but its negative impact is great, the life will be reduced to the original 1/3, and the battery function will significantly decline. Fuel cars do not have these questions, refueling time does not exceed 5 minutes, safety and stability can be guaranteed.

Iii. Safety function to be improved: since the birth of lithium battery pack, safety questions have always puzzled consumers. From mobile phones and laptops to today's electric cars, safety accidents keep happening. In addition to nissan and tesla's electric cars, which have not been reported to have caught fire, China's zotye and byd, the United States' general motors and fisk electric vehicles have all had spontaneous combustion or fire work.

The existence of the above three questions, make lithium battery to overcome the three shortcomings of the increase in research and development costs, high prices of goods like the power battery and power battery electric vehicle development.

The page contains the contents of the machine translation.