Detection method and equipment for lithium-ion battery pole piece adhesion

A technology of lithium ion battery and testing equipment, applied in the field of lithium ion battery, can solve the problems of large fluctuation of tensile force, deviation of testing results, and difficulty in determining testing results.

Active Publication Date: 2015-09-02
DONGGUAN AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, both of the above two methods have great defects. The former one is affected by the gesture and strength when crossing the grid, which leads to a large deviation in the detection results.
In the latter case, the adhesive force between the tape and the pole piece is affected by the pressure during pasting, and the tension fluctuates greatly when the tape and the pole piece are separated, which makes it difficult to judge the test results.

Method used

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  • Detection method and equipment for lithium-ion battery pole piece adhesion
  • Detection method and equipment for lithium-ion battery pole piece adhesion
  • Detection method and equipment for lithium-ion battery pole piece adhesion

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Experimental program
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Embodiment Construction

[0032] The present invention and its beneficial technical effects will be described in detail below with reference to the drawings and specific embodiments.

[0033] See figure 1 , The device for testing the adhesion of lithium-ion battery pole pieces of the present invention includes a console 1, an ultrasonic vibrator 2, a vibrating bracket 3, a pattern clamp 4, and a tray 5.

[0034] The ultrasonic vibrator 2 is located inside the console 1. One end of the vibrating bracket 3 is fixedly connected to the ultrasonic vibrator 2 and the other end is fixedly connected to the pattern clamp 4, so that the vibration bracket 3 can directly transmit the vibration from the ultrasonic vibrator 2 Passed to the style fixture 4.

[0035] The tray 5 is located above the operating table 1 and directly below the pattern holder 4, and is used in conjunction with the pattern holder 4 to hold the part of the coating film that has fallen off the pole piece pattern after vibration.

[0036] See figure 2...

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Abstract

The invention discloses a method for detecting cohesiveness of a lithium ion battery pole piece. According to the method, ultrasonic vibration is applied to a pole piece sample for a certain time so that coatings on the pole piece fall off, and then the cohesiveness of the pole piece can be judged according to the amount of the coatings falling off from the pole piece sample. The technical scheme of the invention has the following beneficial effects: 1, since the vibration represents the whole pole piece and the cohesiveness difference among all positions on the pole piece is shield, the detection result is more accurate; and 2, the method is simple and practical and can be used for detecting the cohesiveness of the pole piece quickly.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and particularly relates to a method and equipment for detecting the adhesion of lithium ion battery pole pieces. Background technique [0002] With the continuous development of modern society, mobile devices such as smart phones, notebook computers, cameras, and EVs (Electric Vehicles) will be more and more widely used, thus forming a large demand for lithium-ion batteries. [0003] The pole piece is the core component of the lithium-ion battery and a very important link in the production process of the lithium-ion battery. The adhesion of the pole piece directly determines the performance of the lithium-ion battery. If the adhesion of the pole piece is not good, there will be quality problems such as low capacity, poor cycle performance, and fast self-discharge. Therefore, after the pole piece is produced, the work of testing the adhesion of the pole piece is particularly important. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00
Inventor 史册何东铭苏树发
Owner DONGGUAN AMPEREX TECH
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