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Detection method of extrusion expansion ratio of lithium ion battery slurry

A lithium-ion battery, extrusion expansion technology, applied in the field of lithium-ion batteries, can solve the problems of cumbersome detection of extrusion expansion ratio and high detection cost

Active Publication Date: 2019-10-18
DONGGUAN CHUANGMING BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a method for detecting the extrusion expansion ratio of lithium-ion battery slurry, aiming at solving the technical problems of cumbersome detection and high detection cost of the existing battery slurry extrusion expansion ratio

Method used

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  • Detection method of extrusion expansion ratio of lithium ion battery slurry
  • Detection method of extrusion expansion ratio of lithium ion battery slurry
  • Detection method of extrusion expansion ratio of lithium ion battery slurry

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0054] An instrument for detecting the extrusion expansion ratio of lithium-ion battery slurry, comprising a first tank 1 for storing battery slurry and a sloping plate 2 for making the battery slurry flow downward due to gravity, and the top of the sloping plate 2 The first flow channel 21 and the second flow channel 22 perpendicular to each other are arranged on the surface, and the top surface of the sloping plate 2 is located at the lower end of the first flow channel 21. A first groove 23 is provided for simulating the flow form of the battery slurry when it enters the touch head. The top surface of the swash plate 2 is located at the downstream position of the second flow channel 22 and is provided with a second groove 24 and a third groove 25 for preventing the battery slurry in the second flow channel 22 from overflowing; the second groove 24 and the third groove 25; The third groove 25 is respectively located on both sides of the first flow channel 21;

[0055] And th...

Embodiment 2

[0057] A lithium ion battery slurry extrusion expansion ratio detection method, comprising the steps of:

[0058] S21: Provide battery slurry and the extrusion expansion ratio detection instrument of Example 1; wherein, the battery slurry includes equal volumes of the first battery slurry and the second battery slurry.

[0059] S22: First use a rubber plug to block the discharge hole 3 in the extrusion expansion ratio detection instrument, add the above-mentioned first battery slurry into the first trough 1, and then pull out the rubber plug, so that the first battery slurry is discharged When the hole 3 flows down the first flow channel 21 to the intersection of the first flow channel 21 and the second flow channel 22, part of the first battery slurry flows laterally along the second flow channel 22 to form a corresponding first transverse flow length m 1 ; Then the second battery slurry is also repeated this process to form a corresponding second lateral flow length m 2 . ...

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Abstract

The invention relates to a method for detecting the extrusion expansion ratio of lithium ion battery pastes. The method comprises the following steps: providing battery pastes and an extrusion expansion ratio detector, wherein the battery pastes comprise a first battery paste and a second battery paste of an equal amount; the extrusion expansion ratio detector comprises a first tank and an inclined plate; a first runner and a second runner which are perpendicular to each other are formed in the top surface of the inclined plate; and a discharge hole is formed in the connecting part of the first tank and the inclined plate; and respectively putting the first battery paste and the second battery paste into the first tank, enabling the first battery paste and the second battery paste to flowoutside the discharge hole, enabling to flow downwards along the first runner till the cross of the first runner and the second runner, enabling a part of the first battery paste and a part of the second battery paste to flow transversely along the second runner to form a first transverse flowing length and a second transverse flowing length correspondingly, and according to comparison of the twolengths, detecting the change of the extrusion expansion ratio of the lithium ion battery pastes. The extrusion expansion ratio testing method is accurate and simple and low in cost, and extrusion coating processes can be instructed.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and more specifically relates to a detection method for extrusion expansion ratio of slurry of lithium-ion batteries. Background technique [0002] In the prior art, the evaluation criteria for lithium-ion battery slurry mainly include viscosity, particle size, solid content, discharge temperature, etc. These evaluation indicators can better reflect various properties such as slurry dispersion effect and fluidity. As people have higher and higher requirements for the consistency of the amount of coating on the positive and negative electrodes, and the current coating production of the electrode is mainly extrusion coating, in order to ensure the stability of the coating amount and reduce the difficulty of extrusion coating machine operation, so The requirements for the rheological consistency of the slurry are also increased. However, simply measuring the above evaluation indicator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/04
Inventor 王卓伟陈泽伟王洋杨俊
Owner DONGGUAN CHUANGMING BATTERY TECH