Battery gas production analysis system

Abstract

The invention provides a battery gas production analysis system. The battery gas production analysis system comprises: a gas supply device connected with a gas inlet of a battery; a condensation reflux device, wherein an inlet of the condensation reflux device is connected with an air outlet of the battery, and a reflux inlet of the condensation reflux device is connected with a liquid return opening of the battery, an air inlet of the expansion bin is connected with an outlet of the condensation reflux device, an air outlet of the expansion bin is connected with a detection instrument, an outlet of the condensation reflux device is positioned above an inlet of the condensation reflux device, an electromagnetic valve III is arranged between the inlet of the condensation reflux device and the air outlet of the battery; an electromagnetic valve IV is arranged between the backflow port and a liquid return port of the battery, and an electromagnetic valve V is arranged between the outlet of the condensation reflux device and the air inlet of the expansion bin. According to the analysis system disclosed by the invention, condensation reflux of the volatile electrolyte is realized, the cycle test time of the battery is prolonged, and gas production tests of the battery in high-pressure, low-pressure, high-temperature and low-temperature environments can be coped with; and meanwhile, the expansion bin is arranged, so that the average distance between gases is effectively increased, and the precision and accuracy of mass spectrum testing are improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis, in particular to a battery gas production analysis system. Background technique [0002] With the continuous progress of social development, energy occupies an indelible position in people's lives, but the energy used worldwide is generally fossil energy, which is a non-renewable resource. Therefore, the development of renewable energy is urgently needed. Since the 20th century, batteries have been continuously developed due to their long cycle life, high efficiency and cleanliness, and have become an indispensable part of our lives. However, during the cycle process, the gas generated by irreversible reactions at the electrode interface is prone to lead to battery safety performance. However, it is not known why the irreversible reaction occurs at the electrode interface, which may be related to temperature, pressure, electrode material and electrolyte. Therefore, it is impera...

AI Technical Summary

Problems solved by technology

Therefore, such solvents are currently widely used in commercial ion batteries, such as pouch batteries, prismatic batteries, cylindrical batteries, etc., but most of them are volatile and will enter the test system to pollute the equipment during instrument testing. The accuracy of the test results is reduced, and the continuous volatilization of the electrolyte is not conducive to the long-term cycle test of the battery, and also affects the service life of the instrument

Images