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

(4)Tsinghua University He Xiangming: The 5-minute fast charging of lithium batteries is a false proposition
author:enerbyte source:本站 click351 Release date: 2023-09-14 08:59:45
abstract:
Energy density should not be solely used as an indicator China Energy News: The national plan is to achieve a single battery energy density of 300 watt hours per kilogram by 2020. It is understood that the research and development teams of CATL, Tianjin Lishen, and Guoxuan H...

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Energy density should not be solely used as an indicator

China Energy News: The national plan is to achieve a single battery energy density of 300 watt hours per kilogram by 2020. It is understood that the research and development teams of CATL, Tianjin Lishen, and Guoxuan High Tech have basically achieved the research and development of 300 watt hours per kilogram power lithium batteries. The goal of 300 watt hours no longer seems like a challenge.

He Xiangming: The goal of 300 watt hours is not a problem purely in terms of technology, but as a large-scale application product, batteries are ultimately used in new energy vehicles. We should not only consider charging and discharging capacity, but also consider safety and reliability. We need to constantly verify in practice, and absolutely pass the standards in terms of reliable performance.

The country has introduced subsidy standards for new energy vehicles, set thresholds for subsidies, and stipulated that they are guided by battery energy density. The original intention is good. But there are also certain side effects. Firstly, it drives up the manufacturing cost of batteries, leading to an increase in the company's costs. On the other hand, in order to meet the technical requirements, the company needs to carry a heavy load and move forward.

Comparatively speaking, in the development of batteries abroad, while meeting a certain energy density, more attention is paid to the reliability and safety of batteries.

China Energy News: We see that many new technologies are constantly emerging, and some experts believe that the energy density of lithium batteries is constantly approaching the ceiling. What do you think of this?

He Xiangming: Lithium ion technology is determined by materials and is an electrochemical process that constantly evolves from materials. The progress of lithium ion is not achieved overnight or overnight, but rather a process that slowly crawls like a snail.

Nowadays, it is often said that many new technologies have made progress in one way or another, but technological breakthroughs require long-term accumulation. The development of any industry is a steady process, and breakthroughs in laboratories often take a long time to translate into real productivity.

In addition, any battery technology has a ceiling, and the market is the best way to detect user choices and investment trends. Currently, the vast majority of new energy vehicles are powered by lithium batteries.

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