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Method for measuring adhesive force of lithium ion battery pole piece coating

A lithium ion battery and a measuring method technology are applied in the field of lithium ion battery pole piece coating adhesion measurement, which can solve the problems such as the inability to quantitatively express the pole piece coating adhesion, affecting the quality improvement of lithium ion battery manufacturing, and the like, and achieving error Small, easy to measure, good repeatability

Active Publication Date: 2012-11-21
中创新航科技(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods cannot quantitatively express the adhesion of the pole piece coating, which seriously affects the further improvement of the quality of lithium-ion batteries.

Method used

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  • Method for measuring adhesive force of lithium ion battery pole piece coating
  • Method for measuring adhesive force of lithium ion battery pole piece coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] The lithium-ion battery pole piece coating adhesion measuring method of the present embodiment adopts the following steps:

[0014] 1. Test preparation of the pole piece to be tested:

[0015] Take a steel plate as the test base plate, wipe the test plate with a degreasing gauze dipped in alcohol, and then dry it with a clean degreasing gauze. Repeat this process for more than three times until the working surface of the test plate is clean through visual inspection; The clean surface is glued with transparent glue, and one side of the 70mm x 25mm wide double-sided tape is pasted on the transparent glue of the test plate to ensure that the paste is tight, smooth, and wrinkle-free; use the conventional method to coat the positive electrode slurry on the aluminum foil current collector After baking and rolling, cut the pole piece to be tested into a 170mm x 25mm wide pole piece according to the test requirements, and paste the coated side of the pole piece to be tested on...

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Abstract

The invention discloses a method for measuring the adhesive force of a lithium ion battery pole piece coating, comprising the following steps: taking a test base plate, bonding a layer of a transparent adhesive tape on the surface of the test base plate, bonding a layer of a double faced adhesive tape on the adhesive-free surface of the transparent adhesive tape, bonding the other adhesive surface of the double faced adhesive tape onto the coating of a pole piece to be tested by pressing, and reserving an unbonded part at one end in the length direction of the pole piece; clamping the reserved unbonded part by a stretch chuck of a stretch testing machine, bending the pole piece in the length direction of the pole piece and stretching, after peeling the coating of the pole piece to be tested, reading the adhesive force value of the pole piece coating. According to the invention, without changing the technological conditions and process flow of the battery manufacturing technique, the adhesive force value of the pole piece coating can be conveniently measured with small error and good repeatability, and the invention provides the design and manufacturing process of batteries with a reliable basis.

Description

technical field [0001] The invention relates to a method for measuring the adhesion of a lithium-ion battery pole piece coating. Background technique [0002] In recent years, with the emphasis on non-renewable energy crisis and environmental protection, it will become a development trend for people to choose battery-powered vehicles. Green and environmentally friendly lithium-ion batteries are an important part of electric vehicles, and the development and production of batteries is an important factor restricting the development of the entire electric vehicle industry. Since the adhesion of the pole piece coating in the lithium-ion battery has a crucial impact on the performance of the lithium battery and directly affects the internal resistance and cycle life of the lithium battery, it is necessary to test the adhesion of the pole piece in the development and production of the battery . However, the existing methods for testing the coating adhesion of the pole piece are...

Claims

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Application Information

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IPC IPC(8): G01N19/04
Inventor 孙晓宾张鹏杜培培丁钟生任丹张国军张利伟常玉清
Owner 中创新航科技(江苏)有限公司
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