Research team from Harbin Institute of Technology has developed an in-situ non-destructive mapping technology to achieve in-situ temporal and spatial resolution of internal reactions in commercial lithium-ion batteries.

Recently, Professor Du Chunyu's team from the School of Chemical Engineering and Chemistry at Harbin Institute of Technology has made significant progress in the field of non-destructive testing of batteries. The team innovatively developed an in-situ non-destructive mapping technology based on the external magnetic field of the battery, solving the scientific challenge of monitoring the spatial and temporal distribution of internal reactions in commercial batteries. This technology allows for in-situ tracking and visualization of the spatial and temporal evolution of electrochemical reactions inside commercial lithium-ion batteries. The research results have been published in "Joule". The spatial and temporal distribution and evolution of internal reactions in batteries are crucial factors determining battery performance, as well as important indicators of the battery's internal state. However, there has long been a global challenge in the battery field of "invisible internal reactions and difficult to interpret dynamic evolution" during battery operation. To address this challenge, the team has invented a new technology for magnetic field imaging analysis of the spatial and temporal dynamic evolution of internal reactions in batteries, and independently designed and built a high-sensitivity, low-noise, automated in-situ testing system to solve the problem of accurately tracking the distribution of internal reactions in lithium-ion batteries.