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Battery cell dispensing quality detection method

A quality inspection method and cell technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of protection not meeting safety production requirements, complex lighting environment, high cost, etc., and achieve the effect of reducing the risk of ultra-wide

Pending Publication Date: 2022-04-12
重庆冠宇电池有限公司
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  • Description
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Problems solved by technology

Although this method can avoid the situation that materials with similar colors cannot effectively identify the gray threshold and cause missed detection, the application of this method requires a unique lighting environment, so it requires modification or new installation of equipment, which is costly and luminous. The environment is complex, including radioluminescence, UV lamps, electroluminescence, etc. The radiation generated is likely to cause harm to the human body, and simple protection cannot meet the safety production requirements

Method used

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the accompanying drawings showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. It should be noted that all the drawings are in very simplified form and use imprecise scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0028] Thermochromic material is a material that changes color at a specific ambient temperature, and this color change is reversible. Common reversible thermochromic materials on the market include organic materials such as diallyl phthalate, acyl groups or indolines, as well as iodides, complexes, dou...

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Abstract

A battery cell dispensing quality detection method comprises the following steps: preparing a glue solution, adding a reversible thermo-sensitive color-changing material into the glue solution, and uniformly stirring the reversible thermo-sensitive color-changing material and the glue solution; heating the glue solution to enable the glue solution to be in a fluid state; coating a gluing position on the surface of the battery cell with the glue solution mixed with the reversible thermosensitive color-changing material; an image of the surface of the glued battery cell is collected through an image collecting device, and whether the glue line is lack of glue or not is checked. According to the method, the reversible thermosensitive color-changing material is added into the glue solution, and the glue line formed by the glue solution can change color at different temperatures, so that the glue line has a color obviously different from that of an aluminum-plastic film during detection, the state of the glue line can be conveniently detected, the glue line does not develop color at normal temperature, and the appearance of a battery is not influenced. The detection method disclosed by the invention does not need to add new detection equipment or change a battery cell preparation process, and is simple and easy to use.

Description

technical field [0001] The invention belongs to the technical field of lithium battery production, and in particular relates to a method for detecting whether there is a lack of glue after a battery cell glue dispensing process. Background technique [0002] In the preparation process of 3C polymer lithium-ion batteries, processes such as chemical formation, secondary sealing, and dispensing must be performed after being packaged with aluminum-plastic film. The glue dispensing process is to fasten the folded skirt of the cell side and the second side, so as to control the width of the cell body. In the dispensing process, parameters such as the amount of glue dispensed, the length of the glue line, the position of the glue line, and the consistency of the glue line should be controlled to avoid the appearance of the battery cell caused by overflowing glue, or the battery cell caused by the lack of glue. Ultra-wide and other risks. [0003] At present, after the dispensing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27
CPCY02E60/10
Inventor 韦德英宁燕慧
Owner 重庆冠宇电池有限公司
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