During the national "two sessions" in 2022, Wang Fengying, deputy to the National People's Congress and Great Wall Motor Company Limited(601633) president, brought relevant suggestions on promoting the application of thermal runaway protection technology for power batteries.
Driven by a new round of global scientific and technological revolution and industrial reform, China's automobile industry is accelerating its transformation to electrification, intelligence and networking. By the end of 2021, the number of Chinese Shanxi Guoxin Energy Corporation Limited(600617) cars has reached 7.84 million.
In the process of using new energy vehicles, there are also many problems. Among them, the thermal runaway of power battery has the greatest impact in the process of use.
At present, to solve the problem of thermal runaway of power battery, the industry mainly starts from three aspects: intrinsic safety (thermal safety and thermal design of single battery), passive safety (thermal spread and thermal management of battery module) and active safety (thermal management and thermal control of battery system). Intrinsic safety is to start with the thermal runaway mechanism of single battery and solve it from the perspective of material layer design and manufacturing. Passive safety means that after the heat of a single battery is out of control, the system thermal management method, that is, the method of heat insulation and heat dissipation, is used to ensure the safety of the battery pack. The thermal runaway protection technology of power battery based on battery module is particularly important as the last fortress to ensure the life safety of new energy vehicle users.
Wang Fengying said that in 2021, a number of car companies launched relevant safety technologies in the direction of thermal runaway protection of power batteries. However, due to the lack of understanding in the industry, the promotion and application of new technologies is less than expected. In particular, it is worth noting that users who have purchased cars before the emergence of relevant power battery thermal runaway protection technology can not enjoy the protection of these cutting-edge safety technologies.
In the future, the automobile industry is expected to make a comprehensive transformation from traditional fuel vehicles to electrification. In this process, "new energy vehicle safety" has touched the bottom line of consumers, manufacturers and social managers. It is urgent to solve the problem of power battery thermal runaway.
Therefore, Wang Fengying suggested: first, carry out top-level planning at the national level to promote the application of thermal runaway protection technology of power battery and make it a necessary configuration for the delivery of new energy vehicles; Second, gradually improve the thermal runaway protection technology of standard power battery of stock new energy vehicles. For example, replace the power batteries matching the thermal runaway protection technology for the existing stock models in batches, and establish an exit mechanism for the old new energy vehicles to ensure that all new energy models on the market are included in the thermal runaway protection technology protection system of power batteries.
"Power battery thermal runaway protection technology, as the latest technology, is difficult to be popularized rapidly only by the strength of a few enterprises. There is an urgent need for top-level planning at the national level to promote power battery thermal runaway protection technology to become a necessary technology for the delivery of new energy vehicles." Wang Fengying said, "it is suggested that the industry association build a platform to arouse widespread awareness from all sectors of society and the industry and jointly promote the application of thermal runaway protection technology for power batteries."
