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Lithium ion battery pole piece flexibility detection device and detection method

A lithium-ion battery and detection device technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of different bending angles of pole pieces, uneven force, poor reproducibility, etc., and achieve less interference factors, Simple operation and good reproducibility

Pending Publication Date: 2019-03-08
TIANJIN LISHEN BATTERY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: different bending angles of pole pieces, different curvatures, uneven force, poor reproducibility

Method used

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  • Lithium ion battery pole piece flexibility detection device and detection method
  • Lithium ion battery pole piece flexibility detection device and detection method

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Embodiment Construction

[0025] Below in conjunction with specific embodiment, the technical scheme of this patent is described in further detail;

[0026] Such as figure 1 As shown, a detection device for the flexibility of a lithium-ion battery pole piece includes two vertical plates (2) fixed vertically at both ends of the base (1) respectively, and a rolling needle ( 3).

[0027] In a further solution, locking screws (6) are connected to the two splints (5).

[0028] In a further solution, a weight (7) is hung under the splint (5).

[0029] In a further solution, the rolling needle (3) can be replaced with models of different diameters.

[0030] In a further solution, the weight (7) can be replaced with different quality models, and the weight can also be gradually increased.

[0031] The detection process is as follows:

[0032] Step 1. Lay the pole piece 4 to be tested on the coil needle 3, put the two ends down and clamp it with the splint 5, and then lock the splint 5 with the locking scr...

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Abstract

The invention relates to the field of lithium ion battery detection, in particular to a lithium ion battery pole piece flexibility detection device and detection method. The detection device comprisesa base (1) and two vertical plates (2) vertically fixed to two ends of the base (1), a winding needle (3) is mounted between the two vertical plates (2), a pole piece (4) needing testing is hung on the winding needle (3), a clamp plate (5) is mounted on the lower portion of the pole piece (4), and a weight (7) is hung on the lower portion of the clamp plate (5) and used for straightening the polepiece (4). The device is matched with a high-rate microscope to observe whether a pole piece coating is broken or not and observe the size of a crack, and the device solves the problem that quantification is difficult in current pole piece flexibility detection.

Description

technical field [0001] The invention relates to the field of lithium-ion battery detection, in particular to a lithium-ion battery polar piece flexibility detection device and a testing method thereof. Background technique [0002] The pole pieces of lithium-ion batteries are made by coating slurry on metal foil. Usually, the negative electrode slurry is coated on the surface of the copper foil, and the positive electrode slurry is coated on the surface of the aluminum foil. Nowadays, there are many kinds of materials, and the formulations are ever-changing. The flexibility of the obtained pole piece is very important for the subsequent winding process. Poorly flexible pole pieces will affect the subsequent winding process, causing safety hazards such as cracks and foil leakage. Therefore, the detection of pole piece flexibility is of great significance for the development and production of lithium-ion batteries. [0003] In the prior art, the testing method for the flexi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/14
CPCG01N3/14
Inventor 周达陈英龙宋一鸣马晓承高金辉张俊玉伍绍中
Owner TIANJIN LISHEN BATTERY
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