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A lithium-ion battery pole piece adhesion testing device and operating method

A technology of lithium ion battery and operation method, which is applied in the field of lithium ion battery pole piece adhesion test device, can solve the problems of difficult lithium ion battery pole piece adhesion force, inability to perform quantitative analysis, etc., and achieves the effect of high accuracy

Active Publication Date: 2022-05-17
江西格林德能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this test method is convenient, this method cannot be used for quantitative analysis. Sometimes the test results are different due to the different angles of tearing the tape, so it is difficult to quantify the adhesion of lithium-ion battery pole pieces.

Method used

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  • A lithium-ion battery pole piece adhesion testing device and operating method
  • A lithium-ion battery pole piece adhesion testing device and operating method
  • A lithium-ion battery pole piece adhesion testing device and operating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1-Positive electrode sheet adhesion strength test:

[0030] (1) if figure 1 As shown, first use 3M double-sided adhesive tape 4 to fix the positive electrode sheet 5 on the upper platen 3, the surface of the positive electrode sheet 5 needs to be tested downward, and the positive electrode sheet 5 is required to be pasted flat;

[0031] (2) if Figure 2-3 As shown, the upper surface of each weight 9 plus an area of ​​5mm 2 3M double-sided adhesive tape 10, the mass of weight 9 is 100g;

[0032] (3) if Figure 4-5 As shown, place the weight box 6 with weights directly under the upper platen 3, press the button 8 and press the cylinder 1 and keep it for 1 minute; the air pressure is set to 0.02mpa, and the cylinder 1 is required to descend slowly at a speed of 30mm / S;

[0033] (4) if Figure 6 As shown, press the button 8 again, the upper platen 3 rises, the rising speed is 30mm / S, and stand for 1 minute;

[0034] (5) if Figure 7 As shown, observe the...

Embodiment 2

[0036] Embodiment 2-Positive electrode sheet adhesion strength test:

[0037] (1) if figure 1 As shown, first use 3M double-sided adhesive tape 4 to fix the positive electrode sheet 5 on the upper platen 3, the surface of the positive electrode sheet 5 needs to be tested downward, and the positive electrode sheet 5 is required to be pasted flat;

[0038] (2) if Figure 2-3 As shown, the upper surface of each weight 9 plus an area of ​​5mm 2 3M double-sided adhesive tape 10, the mass of weight 9 is 100g;

[0039] (3) if Figure 4-5 As shown, place the weight box 6 with weights directly under the upper platen 3, press the button 8 and press down on the cylinder 1 and keep it for 1 minute; the air pressure is set to 0.03mpa, and the cylinder 1 is required to descend slowly at a speed of 50mm / S;

[0040] (4) if Figure 6 As shown, press the button 8 again, the upper platen 3 rises, the rising speed is 50mm / S, and stand for 1 minute;

[0041] (5) if Figure 7 As shown, obs...

Embodiment 3

[0043] Embodiment 3-negative electrode sheet adhesion strength test:

[0044] (1) if figure 1 As shown, first use 3M double-sided adhesive tape 4 to fix the negative electrode sheet 5 on the upper platen 3. It is necessary to test that the surface of the negative electrode sheet 5 faces downward, and the electrode sheet 5 is required to be pasted flat;

[0045] (2) if Figure 2-3 As shown, the upper surface of each weight 9 plus a piece of area is 10mm 2 3M double-sided adhesive tape 10, the mass of weight 9 is 100g;

[0046] (3) if Figure 4-5 As shown, the weight box 6 with weights is placed directly under the upper platen 3, press the button 8 and the cylinder 1 is pressed down and kept for 1 minute. The air pressure is set to 0.02mpa, and the cylinder 1 is required to descend slowly at a speed of 30mm / S;

[0047] (4) if Figure 6 As shown, press the button 8 again, the upper platen 3 rises, the rising speed is 30mm / S, and stand for 1 minute;

[0048] (5) if Figure...

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Abstract

The invention discloses a lithium-ion battery polar piece adhesion test device and an operation method. The device includes a weight, a weight box, an upper platen, a base and a support frame. A cylinder is arranged above the support frame and connected to the upper platen. The cylinder can Reciprocating movement in the vertical direction; the operation method includes the following steps: (1) first use 3M double-sided adhesive to fix the pole piece on the upper platen, and the surface of the pole piece to be tested is facing downward; (2) on the positive pole to be tested Paste 3M double-sided tape on the negative plate or the negative plate; (3) Place the weight box with weights directly under the upper platen, press the button and press the cylinder down for 1-2 minutes; (4) Press it again Press the button, the upper platen rises, let it stand for 1-2 minutes, observe the weight ratio left in the weight box, if the ratio is ≦30%, it means that the adhesion strength of the pole piece is up to standard. The invention can quickly and quantitatively test the adhesion of the pole piece; and the direction of each pulling force is fixed and vertically downward, so the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery pole piece adhesion testing device and an operation method. Background technique [0002] Lithium-ion batteries are currently the most widely used energy source. In the field of portable mobile power supply, smart phone, notebook computer, tablet computer, camera and other portable electronic products, the promotion and application are continuously expanded. A battery pole piece of a lithium ion battery includes a current collector and an electrode active material coated on the current collector. The bonding strength between the electrode active material and the current collector directly affects the performance of the battery. It also directly affects the rate performance and cycle stability of the battery system, which in turn determines the service life of the battery. [0003] At present, the more common way is to use adhesive tape to di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 胡李李国敏易龙李露黄小王敏
Owner 江西格林德能源有限公司