Chinese research team successfully develops high-temperature multi-modal sensor inside battery

According to news on October 7, the scientific research team of the University of Science and Technology of China has made a major breakthrough in the field of lithium battery safety. They and their partners at Jinan University have successfully developed an innovative technology that can be implanted inside the battery to conduct high-precision analysis and early warning of the entire thermal runaway process of lithium batteries.

This breakthrough research result was completed by the team of Professor Sun Jinhua and Wang Qingsong Research Institute of the State Key Laboratory of Fire Science at the University of Science and Technology of China and the team of Professor Guo Tuan of Jinan University. They proposed a multi-modal integrated optical fiber in-situ detection technology that can be implanted inside the battery, and successfully designed and manufactured multi-modal integrated optical fiber sensors. These sensors can work normally in high-temperature and high-pressure environments, with temperatures reaching 1000°C.

According to the editor’s understanding, this set of equipment can simultaneously measure the temperature and pressure inside the battery, achieving synchronous and accurate measurement and solving the problem of temperature and pressure in extreme environments. The problem of signal interference. In addition, the research team also proposed a new method that can decouple the heat generated by the battery and the rate of change of air pressure, and for the first time discovered the characteristic inflection point and common law that triggers the thermal runaway chain reaction of the battery. This discovery provides an important means to quickly cut off the battery thermal runaway chain reaction and ensure that the battery operates in a safe range

Currently, battery thermal runaway has become a major problem in the large-scale development of electric vehicles and new energy storage. From a local short circuit to a large area short circuit, the internal temperature of the battery may rise rapidly, even exceeding 800°C, causing the battery to catch fire and explode. Therefore, scientific, timely and accurate prediction of battery safety hazards is crucial to battery safety. This research result has been published in the journal "Nature Communications" and will provide strong support for further development and improvement in the field of battery safety

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