New breakthroughs in battery safety for new energy vehicles, Weihong releases non-burning battery technology

Weihong CEO Wu Yang released a new non-combustion battery technology at Beijing Water Cube on March 19. The electric vehicle market has been extremely hot in the past year, but the global automakers have not sold electric vehicles on a large scale. What is the reason? One of the important reasons is the uncontrollable combustion of lithium-ion batteries. Weihong CEO Wu Yang introduced that as an energy carrier, lithium-ion batteries have uncontrollable internal short-circuit risks during production and use. It is calculated according to the current industry’s highest standard of 18650 battery cell quality control rate of 2ppm. For every 100,000 vehicles sold, 1600 vehicles are at high risk of spontaneous combustion. After years of research and experimentation, Weihong’s Ru0026D team has concluded that when a thermal runaway occurs in a lithium-ion battery, the electrolyte emits the most heat. Therefore, not burning the electrolyte is the most important problem to be solved to ensure that the battery does not burn. While ensuring that the electrolyte does not burn, it can also ensure the fast charging and long-life characteristics of the battery. For this reason, the Weihong team has made unremitting efforts to finally overcome this problem. The made battery can also achieve ten minutes of fast charging and Long cycle life of more than 10,000 times. In addition to the fact that the electrolyte does not burn, the high-performance diaphragm is also an important guarantee for the safety of lithium-ion batteries. Ordinary lithium-ion battery separators usually have a low melting point and will shrink at about 130 degrees Celsius, resulting in an internal short circuit of the battery and thermal runaway. As a membrane technology expert with 30 years of practical experience, Li Xiang, Chief Technology Officer of Weihong, put forward the idea of u200bu200bhigh temperature resistant diaphragm. Compared with ordinary PE diaphragms, the high temperature resistant diaphragms have a higher melting point, which can ensure that the battery will not shrink even at a high temperature of 300 degrees Celsius, preventing internal short circuits in the battery and avoiding thermal runaway. Solving the problems of electrolyte and diaphragm inside lithium-ion batteries is equivalent to actively setting up defensive measures for non-combustible batteries. In terms of battery system level safety, Weihong also demonstrated the safety advantages brought by the STL intelligent thermal fluid technology using immersion. As a material with excellent insulation, flame retardancy and thermal conductivity, STL can quickly isolate the thermal runaway point in the case of a small internal short circuit inside the battery pack, and use liquid to reduce the temperature of the thermal runaway point to minimize the battery pack Security Risk. As a passive defense system, in addition to safety, STL can also balance the internal temperature difference of the battery pack and use external circulation to achieve better temperature control. At the same time, even if the battery pack leaks, it can be found through liquid detection in time, which is safer and more secure. Assure. When Weihong began to focus on the research and development of electric vehicle power systems in 2008, it has established three Ru0026D elements of '10-minute fast chargingThe basis of the Clean Urban Transport (CCT) strategy for the electrification of urban transport. Today, through the continuous implementation of the CCT strategy, '10-minute fast charging' and 'long life' have been widely recognized by the market, with more than 10,000 sets of applications in 6 countries and more than 100 cities around the world. 'New energy vehicles' is a landmark industry in the industrial field of the 'new economy'. The development of new energy vehicles has once again been promoted to an important strategy. Today, important factors restricting the development of new energy vehicles include battery safety and charging convenience. Weihong advocates the 10-minute fast charging, long-life and non-burning battery technology, which promotes the development of new energy vehicles on the fast lane.