Cctv newsThe 2022 Winter Olympic Games will be held in China, and the China government has once again made a promise of "Green Olympics". Around this goal, it is an important link to realize green transportation during the Olympic Games. On August 31st, Beijing Institute of Technology and other research teams released an achievement: the all-weather battery product was successfully developed, that is, the battery of electric vehicles can still work normally under all climatic conditions, including extreme low temperature.
In the cold environment, electric vehicles will face challenges.
After investigation, during the Beijing Winter Olympics, vehicles will face a low temperature of -20℃ to -30℃, and the use of new energy vehicles will face the following challenges ↓ ↓
The charging and discharging characteristics of the power battery become worse!
Battery capacity and life will also decay!
These will lead to a significant decline in vehicle driving range and vehicle dynamic performance!
Sun Fengchun, Director of the National Engineering Laboratory of Electric Vehicles of Beijing Institute of Technology and Chief Expert of the Expert Group of Beijing New Energy Vehicle Association:
Now the electric vehicle (cruising range) has reached more than 300 kilometers, but it may only run for dozens of kilometers at MINUS 10℃.The farthest distance between the two venues of Beijing Winter Olympics, that is, the Chongli distance from Wukesong in Beijing to Zhangjiakou is 260 kilometers. How to last the electric vehicle at low temperature is a problem that must be solved.
New technology, let electric vehicles break through the low temperature forbidden zone
The team led by Professor Sun Fengchun developed the world’s first all-climate battery product by using the rapid thermal conductivity generated by metal heating inside the battery. The key technologies are as follows ↓ ↓
A layer of nickel-platinum sheet was added to the existing lithium battery.
Connect the power supply, and the battery can be heated quickly!
Sun Fengchun:
At MINUS 30℃, the temperature of our battery rises to above zero in twenty seconds, so it can work very well and has no influence on the life of the battery. This is the core technology. In other words, there is no forbidden area for electric vehicles, which is a milestone principle and technology in this respect.
Low temperature environment, all the key technologies of new energy vehicles are overcome.
In addition, key technologies such as vehicle system integration and control in low temperature environment have also made breakthroughs. The cooperative control technology of automatic driving and automatic charging has laid a solid foundation for the application of new energy vehicles during the Winter Olympics.
Sun Fengchun:
From the battery cell, battery system to the system integration of the whole vehicle, it should be said that the technology has been completely overcome.Our core key components are required according to the standard of low temperature of MINUS 45℃ to ensure that there will be no problems during the Winter Olympics.
At the end of this year, all-weather electric vehicles will be launched.
According to reports, the first batch of all-weather electric vehicles in the world will be released at the end of December this year, and then they will go to Mohe and other alpine regions for experiments at around MINUS 45 C. It is estimated that in 2020, the development of 11 product prototypes of four types of vehicles will be completed, and the demonstration operation will begin.
Zhang Jihong, Deputy Director of Beijing Municipal Science and Technology Commission:
We should further integrate some technologies from Beijing, China and even foreign countries to tackle key problems in Industry-University-Research. Whether it is low-temperature battery technology or driverless technology, a complete and comprehensive presentation can be obtained during the 2022 Winter Olympics.
