Method for preparing battery test intermediate

Abstract

The present invention provides a method for preparing a battery test intermediate. Firstly, material layers are deposited on a substrate, wherein the thickness of a first electrode layer decreases gradually along a first direction; the thickness of a electrolyte layer is uniform; and the thickness of a second electrode layer increases gradually along the first direction. Secondly, the surface of a second current collecting layer is covered with a mold cover; the mold cover comprises a plurality of templates spaced apart; the plurality of templates are arranged in an array; each column of the templates includes at least two templates; and there are at least two templates which have a same cross-sectional area and located at different columns in the plurality of templates. Finally, an ion beam etching device is controlled to sequentially etch each material layer along the spacer regions of the templates so that a first current collecting layer corresponding to the spacer regions is exposed. The battery test intermediate obtained by the preparation method facilitates the rapid batch electrochemical performance test for a plurality of batteries with same proportions of components and different cross-sectional areas or a plurality of batteries with the same cross-sectional area and different proportions of components.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for preparing a battery testing intermediate. Background technique [0002] In the process of battery production and manufacturing, it is often necessary to perform different tests on different electrical properties of the battery, such as resistance and conductivity tests. The resistance and conductivity of the battery are related to its cross-sectional area and component ratio. Therefore, it is very important to study the resistance and conductivity of batteries with different cross-sectional areas or different composition ratios. [0003] At present, because the battery includes a multi-layer structure such as positive electrode current collector, positive electrode, electrolyte, negative electrode, and negative electrode current collector layer, especially for micro-scale or even nano-scale micro-batteries and thin-film batteries, it is difficult to prepare multip...

AI Technical Summary

Problems solved by technology

[0003] At present, because the battery includes a multi-layer structure such as positive electrode current collector, positive electrode, electrolyte, negative electrode, and negative electrode current collector layer, especially for micro-scale or even nano-scale micro-batteries and thin-film batteries, it is difficult to prepare multiple batteries with the same total thickness at the same time. , but only batteries with different cross-sectional areas or only different component ratios are used to study the electrochemical performance, and the test process is time-consuming and cumbersome

In addition, due to the differences in material and thickness between existing battery cells, it is difficult to accurately reflect the impact of differences in cross-sectional area or component ratio on the electrochemical performance of the battery.

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