Method of testing porosity of pole piece

A technology of porosity and test poles, which is applied in the field of lithium-ion battery process material evaluation, can solve the problems of troublesome waste mercury treatment, high cost of mercury porosimeter use, and difficult operation, so as to reduce processing work, improve test efficiency, and reduce measurement cost effect

Active Publication Date: 2013-06-05
TIANJIN ENERGIES
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Problems solved by technology

[0006] In view of this, the present invention provides a method for testing the porosity of the pole piece, to overcome the operational difficulties of the mercury porosimeter in the prior art, the high cost of use of th

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  • Method of testing porosity of pole piece
  • Method of testing porosity of pole piece
  • Method of testing porosity of pole piece

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Embodiment Construction

[0024] The invention discloses a method for testing the porosity of pole pieces, so as to reduce the measurement cost, reduce mercury pollution and potential harm to operators, reduce waste mercury treatment work, and improve test efficiency.

[0025] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The technical principle of the inventive method is:

[0027] The wetting process is related to the interfacial tension of the system. When a drop of liquid falls on a horizontal solid surface, when equilibrium is reached, the relationship between the formed contact angle and each inte...

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Abstract

The invention discloses a method of testing porosity of a pole piece. The method comprises that a certain pole piece is cut and taken, the mass M0 of the pole piece is weighed, the size V of the pole piece is measured, the pole piece is placed in a container, cetane is arranged in the container, the pole piece is completely soaked in the cetane for a certain time, the pole piece is taken out and placed on a filter paper, the pole piece is absorbed and wiped to constant weight, the mass M1 of the pole piece is weighed, and the porosity epsilon of the pole piece is calculated according to a formula epsilon=(M1-M0)/rho/V*100%. The method of testing the porosity of the pole piece needs not the complex and difficult operating process of mercury injection apparatus, and reduces measuring cost, in addition, mercury pollution and potential hazard on operation staff are reduced, meanwhile the processing work on waste mercury is reduced, and testing efficiency is improved.

Description

technical field [0001] The invention relates to the field of lithium-ion battery process material evaluation, and more specifically relates to a method for testing the porosity of pole pieces. Background technique [0002] Porosity refers to the ratio of the total volume of tiny voids in a porous medium to the total volume of the porous medium, and is divided into effective porosity and absolute porosity. The ratio of the external volume of the porous medium, the absolute porosity is the ratio of the total volume of all connected and non-connected tiny voids in the porous medium to the external volume of the porous medium, and the generally referred to porosity refers to the effective porosity . Porosity is related to the shape, structure and arrangement of solid particles in porous media. It is an important parameter affecting the fluid transmission performance in porous media. The porosity of a material directly reflects the compactness of the material. A high porosity of...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N5/02
Inventor 宋洁王丹丹姚瑞环
Owner TIANJIN ENERGIES
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