Battery cycle process in-situ observation tool and method thereof

Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a battery cycle process in-situ observation tool which comprises a left clamping block, a right clamping block,a fastening bolt and a glass upper cover. The upper portions of the left clamping block and the right clamping block are used for clamping a battery. The glass upper cover is connected with the upperportion of the battery through resin, adjusting areas used for adjusting the battery are arranged in the middle of the left clamping block and the middle of the right clamping block, and the fasteningbolt is in threaded connection with the left clamping block and the right clamping block to fix the left clamping block and the right clamping block. According to the invention, the problem of lithium precipitation caused by multiple times of charging and discharging because the negative electrode does not exceed the positive electrode at the section is solved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to an in-situ observation tool and method for the battery cycle process. Background technique [0002] In recent years, with the continuous and in-depth application of lithium-ion batteries in new energy vehicles, energy storage systems and 3C products, the research on lithium-ion batteries has also gone from the existing external electrical performance testing to the internal lithium insertion process research. In addition, the research on battery cycle life is no longer limited to external electrical performance tests. [0003] At present, the relevant technologies for in-situ observation of battery charging and discharging include: vertical electrochemical battery device for in-situ photomechanical measurement (CN 105445347 A), which can realize in-situ charging and discharging observation of batteries, but cannot Perform optical inspection of the cycle process. B...

AI Technical Summary

Problems solved by technology

[0003] At present, the relevant technologies for in-situ observation of battery charging and discharging include: vertical electrochemical battery device for in-situ photomechanical measurement (CN 105445347 A), which can realize in-situ charging and discharging observation of batteries, but cannot Optical inspection of cyclic processes

Because, when conducting battery cycle observation, there are two problems. 1. Because the negative electrode is not completely coated with the positive electrode at the cross section, there will be lithium precipitation after multiple charge and discharge; 2. After multiple charge and discharge, the electrolyte at the observed cross section disappears. , lithium intercalation cannot be observed

And the existing in-situ test of the battery cycle process has adopted the mode of in-situ Raman monitoring to carry out: as a kind of device (CN 208111618 U) in-situ Raman monitoring in the battery cycle process, but this method can't check the shape of the cycle process battery. Observing the appearance, unable to observe the lithium intercalation of the battery

[0004] According to another search, the method of using polymer to solidify the observation profile to realize the in-situ observation of the lithium-ion battery cycle process has not been reported yet.

Images