Experimental platform for observing deformation failure of electrode material under compression/indentation working condition

Abstract

The invention discloses an experimental platform for observing deformation failure of an electrode material under a compression / indentation working condition, the electrode material is a lithium ion battery electrode material, the experimental platform comprises a loading table, an upper pressure plate, a lower pressure plate and an observation system, and the loading table is used for applying a compression load and calculating a compression displacement; the upper pressure plate is made of organic glass and is connected with the loading table; the lower pressure plate is made of organic glass, an upper groove for placing an electrode sample to be tested is formed in the lower pressure plate, the lower pressure plate is arranged on the loading table, and the upper pressure plate is positioned right above the upper groove of the lower pressure plate; and the observation system is used for observing the deformation of the upper surface of the top layer of the electrode sample, the deformation of the lower surface of the bottom layer, the deformation in the thickness direction, the section morphology and the failure process of the to-be-detected electrode sample in real time. According to the platform, the deformation failure process of the electrode material under the compression / indentation working condition can be observed in real time, the experiment cost is low, and the operability is high.

Description

technical field [0001] The invention relates to the technical field of electrode material observation, in particular to an experimental platform for observing deformation and failure of electrode materials under compression / indentation working conditions. Background technique [0002] Some collisions will inevitably occur during the use of electric vehicles. When the vehicle power battery is subjected to mechanical overload, it will deform, resulting in failure of internal materials, which will cause internal short circuit and even thermal runaway in the positive and negative contacts. Studying the mechanical properties and failure mechanism of battery electrode materials provides a basis for establishing a battery finite element model and lays an important foundation for exploring the internal short circuit mechanism of the battery. Due to the large difference between the in-plane and out-of-plane mechanical properties of electrode materials, it is often necessary to carry ...

AI Technical Summary

Problems solved by technology

In terms of visual mesoscopic research on the extrusion test of electrode laminates, in the prior art, X-ray scanning technology is used to observe internal deformation and damage, but the detection cost is high and the operation is complicated; To the specified load / compression displacement, unloading, and then observe, this process cannot achieve real-time observation, and will introduce additional damage factors in the process of unloading and dismantling observation

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