In-situ detection method for multiple gas in full life cycle of commercial battery

• Main Authors: SONG WEILI, CHEN HAOSEN, SUN LEI, LI NA, YANG LE, LYU SIQI
• Format: Patent
• Language: Chinese; English
• Published: 28.05.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to an in-situ detection method for multiple gas in the full life cycle of a commercial battery, and belongs to the technical field of commercial batteries. The method comprises the following steps: detecting gas generated in a battery in real time by using a gas sensor, externally connecting an electrochemical workstation and sensor data analysis equipment in a test process, changing test conditions, carrying out a charge-discharge cycle test, and simultaneously collecting data of the gas sensor; and the real-time monitoring of the change of the gas concentration in the battery along with the voltage and current under different conditions in the whole life cycle is realized. The method can be used for detecting the gas generated in the full life cycle (the capacity retention ratio being greater than 80%) of different types of commercial batteries; real-time on-line quantitative measurement of gas is realized; the gas sensor is used for replacing gas chromatography and other large-scale a