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Graphite powder detection method

A detection method, technology of graphite powder, applied in the direction of material weighing, measuring device, analysis of materials, etc., can solve problems such as failure of 200-mesh sieve, avoid scratches and leakage of metal, avoid misjudgment, and ensure accuracy Effect

Active Publication Date: 2022-05-13
JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, there are loopholes in the traditional incoming material detection method: for graphite powder containing irregular graphite particles with a width direction <75 μm and a length direction exceeding the specification, the 200-mesh sieve fails to sieve

Method used

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Embodiment Construction

[0044] In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments.

[0045] A graphite powder detection method, the method steps comprising:

[0046] Step S1: Pour the graphite powder into a 300-mesh sieve and sieve to obtain the sieve extract;

[0047] Step S2: Sieve the sieved material through a 200-mesh sieve and a 300-mesh sieve overlapped from top to bottom to obtain a large-grain sieve and a small-grain sieve;

[0048] Step S3: Ultrasonic cleaning and drying of the large-grain sieve and the small-grain sieve;

[0049] Step S4: Weigh the dried large particle sieve and small particle sieve respectively, and calculate the weight ratio relative to the graphite powder, according to the weight ratio of the large particle sieve and small particle sieve Compare to judge whether the graphite powder meets the specification.

[0050] In order to prevent the graphite ...

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Abstract

The invention discloses a graphite powder detection method. The steps of the method include: step S1: pour the graphite powder into a 300-mesh sieve and sieve to obtain a sieve; step S2: pass the sieve through a top-down Sieve the overlapped 200-mesh sieve and 300-mesh sieve to obtain the large-grain sieve and the small-grain sieve; step S3: ultrasonically clean and dry the large-grain sieve and the small-grain sieve; step S4: Weigh the dried large-grain sieve and small-grain sieve respectively, and calculate the weight ratio relative to the graphite powder, according to the weight ratio of the large-grain sieve and small-grain sieve Determine whether the graphite powder meets the specification. The invention can well detect whether the graphite powder meets the specification, especially can effectively identify large irregular graphite particles, thereby effectively avoiding metal leakage from scratches on the graphite coated particles.

Description

technical field [0001] The invention relates to a method for detecting graphite powder. Background technique [0002] Large particles of anode incoming material will cause scratches on coating particles and leakage of metal, increasing the number of coating stoppages, and in severe cases, the coating will be broken. In addition, the linear leakage metal diaphragm will flow into the cell end, which has a great potential safety risk. [0003] Large particle limit particle size analysis: [0004] Anodic coating depth filter specification 100um: <100um particles can theoretically reach the coating die; [0005] Coating lip gap: the gap between the lip and the back roller is generally about 100±10um, and the thickness of the substrate is 6um; [0006] How big the particles will get stuck in the lip: theoretically, 100% of the particles above 94um will get stuck in the lip; 70-80um particles have a 50% probability of getting stuck in the lip; [0007] Effect of large particl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 王灏骆昌胜童杰张盛武
Owner JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED