-(3)Tsinghua University He Xiangming: The 5-minute fast charging of lithium batteries is a false proposition

(3)Tsinghua University He Xiangming: The 5-minute fast charging of lithium batteries is a false proposition
author:enerbyte source:本站 click214 Release date: 2023-09-14 08:58:57
abstract:
The safety of batteries is closely related to the level of manufacturing, such as dust in the air that falls on the separator, which cannot be seen by the naked eye, but has a significant impact on battery performance. The safety of batteries is closely related to the management and manufactur...

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The safety of batteries is closely related to the level of manufacturing, such as dust in the air that falls on the separator, which cannot be seen by the naked eye, but has a significant impact on battery performance. The safety of batteries is closely related to the management and manufacturing level of battery factories. To improve the safety and reliability of batteries, it is necessary to gradually improve them in all aspects, running through all aspects of production management.

1015 minute fast charging is more realistic

China Energy News: Japan and South Korea are leading China in lithium battery technology, benefiting from the outbreak of new energy vehicles in China. China is also catching up in lithium battery technology, and this gap is gradually narrowing.

He Xiangming: In the field of lithium-ion batteries, in terms of innovation ability, ranked first in the United States; In terms of quality level, Japan ranks first; In terms of manufacturing level, South Korea ranks first. But China's comprehensive capability is the strongest, leading in the comprehensive competitiveness and cost-effectiveness of lithium batteries. So China, Japan, South Korea, and the United States are indispensable to the lithium battery industry.

China Energy News: There are many reports on fast charging technology for electric vehicles now. Is 5-minute fast charging feasible?

He Xiangming: There is hope for fast charging of lithium-ion batteries, but the online hype that it takes only 5 minutes to fully charge is a false proposition. We believe that 1015 minutes is a relatively realistic goal. For example, if a car is charged at 50 kilowatts per hour, it requires a 50 kilowatt charging station; A full charge in 6 minutes requires a 500 kilowatt charging station. If the voltage is 220 volts and the current is over 2000 amperes, it is impossible and will not be used in the community. This involves increasing the capacity of the community's infrastructure. In addition, fast charging poses great risks to the lifespan and safety of batteries.

In terms of fast charging, we are also making some technical reserves and have independently developed a negative electrode material that can greatly shorten charging time. Currently, it is still in the laboratory stage.

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