A battery gas analysis system

Abstract

The present invention provides a battery gas production analysis system, comprising: a gas supply device connected to the air inlet of the battery; a condensation return device, the inlet of the condensation return device is connected to the gas outlet of the battery, and the return port is connected to the liquid return port of the battery; The expansion chamber whose air inlet is connected to the outlet of the condensation return device, and the gas outlet of the expansion chamber is connected to the detection instrument; the outlet of the condensation return device is located above the inlet; a solenoid valve is installed between the inlet of the condensation return device and the gas outlet of the battery Ⅲ; Solenoid valve Ⅳ is set between the return port and the liquid return port of the battery; Solenoid valve Ⅴ is set between the outlet of the condensation reflux device and the air inlet of the expansion chamber. The analysis system of the present invention realizes the condensation and reflux of the volatile electrolyte, improves the cycle test time of the battery, and can also cope with the gas production test of the battery in a high-pressure, low-pressure, high-temperature, low-temperature environment; at the same time, an expansion chamber is set to effectively increase the gas The average distance between them improves the precision and accuracy of mass spectrometry testing.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis, in particular to a battery gas 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, it is unknown why an irreversible reaction occurs at the electrode interface, which may be related to temperature, pressure, electrode material and electrolyte. Therefore, it is urgent to study the causes of battery gas production under different test conditions. [0003] Differential electrochemical mass spectrometry and gas chromatography are powe...

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

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