A test method for conductivity of semi-solid lithium battery electrode slurry
A technology of electrode slurry and material conductivity, which is applied in the direction of measuring resistance/reactance/impedance, measuring devices, measuring electrical variables, etc., to achieve the effects of high precision, stable test results, and easy comparison of results
Active Publication Date: 2020-08-14
BEIJING HAWAGA POWER STORAGE TECH +1
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Problems solved by technology
At present, the electrical conductivity of the electrode paste is mostly measured by the assembled battery, which involves many influencing factors and has not yet formed a unified comparison and evaluation standard.
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Embodiment Construction
[0053] The present invention will be further described through embodiments below in conjunction with the accompanying drawings.
[0054] figure 1 A schematic diagram of a test setup according to the invention is shown. The working electrode 2 and the auxiliary electrode 3 of the electrochemical workstation 1 are respectively electrically connected to the fixture 4 for applying an alternating current to the electrode slurry conductivity test body 5 . Wherein, the fixture 4 is fully in contact with the upper and lower surfaces of the electrode slurry conductivity test body 5 , so as to ensure that the contact resistance between the fixture 4 and the electrode slurry conductivity test body 5 has minimal influence on the test results. In addition, the electrochemical workstation is connected to the computer 6 for setting the test frequency and the amplitude of the disturbance current or the amplitude of the disturbance voltage and reading the results or performing the electrochem...
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The invention provides a method for testing conductivity of an electrode slurry of a semi-solid lithium battery. The method comprises the following steps that: step one, a to-be-tested electrode slurry is prepared; step two, according to a cavity cross sectional area and a cavity height of an electrode slurry conductivity testing apparatus, a theoretical volume is calculated and injection of an electrode slurry is carried out by using a pipetting device; step three, a positive electrode housing of the electrode slurry conductivity testing apparatus is buckled to a negative electrode housing and the positive electrode housing and the negative electrode housing are sealed by using a sealing machine to form an electrode slurry conductivity testing body; step four, an electrode slurry conductivity testing body with quality and height errors in a predetermined range is selected; step five, alternating-current power is applied to the electrode slurry conductivity testing body by an electrochemical workstation; and step six, conductivity of the electrode slurry is calculated based on a conductivity calculation formula. The testing method has advantages of simple operation, stable test result, high precision, and flexible test condition setting.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a method for testing the conductivity of semi-solid lithium battery electrode slurry. Background technique [0002] Semi-solid lithium battery is a new type of electrochemical energy storage system, including semi-solid lithium flow battery and semi-solid lithium slurry battery. Semi-solid lithium batteries can be flexibly designed according to different requirements for energy storage capacity and power, so that they can be applied to different occasions such as large-scale energy storage or power batteries. The battery reactor of the semi-solid lithium battery is mainly composed of positive and negative electrode reaction chambers located on both sides of the isolation layer, and the reaction chamber is filled with electrode slurry. The electrode slurry is formed by dispersing the electrode active material and conductive material in the electrolyte, and realizes the charging...
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IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 冯彩梅刘丹丹陈永翀
Owner BEIJING HAWAGA POWER STORAGE TECH