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Method for detecting stability and viscosity of battery slurry

A technology of stability and slurry, applied in the direction of measuring device, flow characteristics, analyzing materials, etc., can solve the problem of inability to more accurately determine the stability of slurry, affecting the power of battery configuration, fluctuation of areal density, etc., to achieve saving cost, improved stability, improved consistency

Inactive Publication Date: 2020-09-04
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Application Information

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Problems solved by technology

[0003] However, a single viscosity value cannot be used to determine the stability of the slurry more accurately, resulting in frequent fluctuations in the surface density during the coating process, which has a greater impact on the capacity consistency of the battery cells in the later period, and also affects the stability of the battery. Matching power

Method used

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  • Method for detecting stability and viscosity of battery slurry
  • Method for detecting stability and viscosity of battery slurry
  • Method for detecting stability and viscosity of battery slurry

Examples

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Embodiment 1

[0025] A method for detecting battery slurry stability and viscosity, comprising the steps of:

[0026] S1. Take 5g samples from the upper layer and the lower layer of the battery slurry at a temperature of 25°C, and record them as the upper layer sample and the lower layer sample;

[0027] S2. Carry out two test scans on the upper layer sample and the lower layer sample respectively with a rheometer, and obtain 4 rheological curves; wherein, during the two test scans, the shear direction of the sample is opposite, and the test scan temperature is 25°C;

[0028] For the first test scan, from 0s to 300s, the viscosity value is detected once per second, and the viscosity value detected at the 10th second is the viscosity of the sample;

[0029] In the second test scan, from 300s to 0s, the viscosity value is detected once per second, and the viscosity value detected at 291 seconds is the viscosity of the sample;

[0030] S3. Analyze the coincidence of the 4 rheological curves. ...

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Abstract

The invention discloses a method for detecting the stability and viscosity of battery slurry, which comprises the following steps: S1, respectively sampling from the upper layer and the lower layer ofthe battery slurry, and marking as an upper-layer sample and a lower-layer sample; S2, respectively carrying out twice test scanning on the upper-layer sample and the lower-layer sample by using a rheometer to obtain four rheological curves; S3, analyzing the coincidence of the four rheological curves, wherein when the coincidence of the four curves is poor, it is determined that the stability ofthe battery slurry is poor, and when the coincidence of the four curves is excellent, it is determined that the stability of the battery slurry is good, and calculating the average value of the viscosity of the sample detected for four times to obtain the viscosity of the battery slurry. The method is simple to operate, and the stability and viscosity value of the battery slurry can be accuratelyevaluated.

Description

technical field [0001] The invention relates to the technical field of battery slurry detection, in particular to a method for detecting the stability and viscosity of battery slurry. Background technique [0002] Lithium batteries mainly include: positive pole piece, negative pole piece, separator, electrolyte, and structural parts. In order to make a good cell, the coating during the cell manufacturing process is very important. Stable areal density can improve the capacity consistency of individual cells. The stability and viscosity of the battery slurry will affect the stability of the areal density of the cell, so it is necessary to monitor the stability and viscosity of the battery slurry. [0003] However, a single viscosity value cannot be used to determine the stability of the slurry more accurately, resulting in frequent fluctuations in the surface density during the coating process, which has a greater impact on the capacity consistency of the battery cells in t...

Claims

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Application Information

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IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 安敏俊陈道明张宏立王桃环刘宏强周巨奎李雪红刘盼盼
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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