Device for in-situ observation of battery pole piece and electrolyte

Abstract

The invention relates to the technical field of lithium batteries, in particular to a device for in-situ observation of a battery pole piece and an electrolyte. The device comprises a sample cell, a sealing film assembly, an electrode fixing part and an electrode assembly, wherein windows are formed in the two opposite sides of the sample cell; the windows on the two sides are sealed through the sealing film assembly; an electrode mounting hole is formed in the top of the sample cell; and the electrode assembly is mounted in the electrode mounting hole through the electrode fixing part. The electrode assembly comprises an electrode holder, electrodes and battery pole pieces, wherein two electrodes are inserted into one end of the electrode holder; two battery pole pieces are inserted intothe other end of the electrode holder; the ends, located in the electrode holder, of the two battery pole pieces are connected with the two electrodes respectively; and the other ends of the two battery pole pieces are contained in the sample cell. The device is simple in structure and convenient to operate, and microcosmic information is measured while macroscopic measurement is carried out on the battery.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a device for observing battery pole pieces and electrolyte in situ. Background technique [0002] As an emerging high-energy secondary battery, lithium batteries have been widely used in digital electronic products, electric vehicles, drones and other fields in recent years. Lithium batteries have the advantages of high energy density, high output power, long cycle life, long battery life, and small self-discharge loss. Therefore, lithium batteries are gradually replacing the application fields of traditional lead-acid batteries and nickel-chromium batteries. There are various types of lithium batteries, including lithium ion batteries, lithium metal batteries, lithium solid state batteries, etc. At present, enterprises, research institutes and schools all over the world are committed to the research of lithium battery technology. Traditional lithium battery research ...

AI Technical Summary

Problems solved by technology

Traditional lithium battery research technologies mostly use macroscopic technical characterization methods, such as current and voltage measurement, impedance measurement, etc.; in these measurement techniques, the microscopic interaction between the battery electrolyte and the electrode, and the electrode and the separator cannot be well reflected. , only a macro-synthetic result can be obtained

There is no effective specific information on the battery microscopic

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