Battery cell gas production detection device and detection method

Abstract

The invention relates to the technical field of energy storage device production, in particular to a battery cell gas producing detection device and a detection method. The battery cell gas producing detection device comprises a gas carrying bottle, a vacuum mechanism, test equipment, a first pipeline and a second pipeline, wherein the two ends of the first pipeline respectively communicate with the gas carrying bottle and the test equipment; the first pipeline is provided with a first communication position; one end of the second pipeline is used for communicating with a first liquid injection hole of a battery cell; the other end of the second pipeline communicates with the first pipeline in the first communication position; the vacuum mechanism is used for performing vacuum pumping on the first pipeline and the second pipeline. The device and the method provided by the invention have the advantages that ingredients of produced gas can be accurately detected; further, a gas producing analysis result and real-time real degree can be improved, so that the gas produced by a lithium ion battery can be studied; the practical gas production problem of the lithium ion battery is solved; the service life of ten years of the battery cells is ensured.

Description

technical field [0001] The present application relates to the technical field of production of energy storage devices, and in particular to a detection device and detection method for battery gas production. Background technique [0002] Lithium-ion batteries are widely used in electronic devices such as mobile phones and notebook computers due to their high energy density and environmental friendliness. In recent years, in response to environmental issues, gasoline price issues, and energy storage issues, the application of lithium-ion batteries has rapidly expanded to gasoline-electric hybrid vehicles and energy storage systems. At the same time, higher requirements are put forward for lithium-ion batteries, especially life requirements (8 years or 10 years) and power requirements. Lithium-ion battery cathode materials, especially lithium cobaltate and ternary nickel-cobalt-manganese cathode materials, are prone to gas production during circulation or storage, which cause...

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Problems solved by technology

[0004] However, the ex-situ gas chromatography-mass spectrometry method collects the gas directly after the cell produces gas, and then analyzes it, which has the nature of analysis delay. Due to the complexity of gas production, the analyzed results may not reflect the current state of the cell. The actual gas production situation, which urgently needs in-situ gas chromatography-mass spectrometry to study the gas production of lithium-ion batteries, in order to solve the problem of gas production of lithium-ion batteries and ensure the ten-year service life of batteries

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