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Lithium ion battery pole piece adhesive force testing device and operation method

The technology of a lithium-ion battery and its operation method is applied in the field of lithium-ion battery pole piece adhesion testing device, which can solve the problems of difficult lithium-ion battery pole piece adhesion size and inability to carry out quantitative analysis, and achieve the effect of high accuracy

Active Publication Date: 2020-04-10
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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  • Lithium ion battery pole piece adhesive force testing device and operation method
  • Lithium ion battery pole piece adhesive force testing device and operation method
  • Lithium ion battery pole piece adhesive force testing device and operation 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 pole piece adhesive force testing device and an operation method. The device comprises a weight, a weight box, an upper pressing plate, a base and a support frame. A cylinder is arranged above the support frame, the cylinder is connected with the upper pressing plate, and the cylinder can reciprocate in the vertical direction. The operation method comprises the following steps: (1) firstly, fixing a pole piece on an upper pressing plate by using a 3M double faced adhesive tape, wherein the surface of the pole piece to be tested is downward; (2) pasting a 3M double faced adhesive tape on a positive plate or a negative plate to be tested; (3) placing a weight box filled with weights under an upper pressing plate, pressing down a button, and pressing down and keeping for 1-2 minutes by an air cylinder; and (4) pressing the button again, ascending the upper pressing plate, standing for 1-2 minutes, observing the proportion of the weights left in the weight box, and if the proportion is less than or equal to 30%, indicating that the adhesive force strength of the pole piece reaches the standard. According to the invention, the adhesive forceof the pole piece can be rapidly and quantitatively tested, and the tension direction of each time is fixed and is vertically downward, so that the accuracy is higher.

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 Applications(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