Preparation method of dry-method electrode pole piece, electrode pole piece and battery cell

An electrode pole piece and dry method technology, which is applied in the field of battery preparation, can solve the problems of self-supporting membrane hole edges, uneven feeding, and excessive material volume, and achieve the goal of improving the poor uniformity of the membrane and improving the quality and performance. Effect

Active Publication Date: 2021-12-31
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Application Information

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Problems solved by technology

[0003] However, this technology is still in the initial stage of research and development, and there are many problems that need to be solved urgently, such as in the preparation process of the pole piece, such as the degree of fiberization of the binder in the mixing stage Insufficient, then the self-supporting film that can be forme

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  • Preparation method of dry-method electrode pole piece, electrode pole piece and battery cell
  • Preparation method of dry-method electrode pole piece, electrode pole piece and battery cell
  • Preparation method of dry-method electrode pole piece, electrode pole piece and battery cell

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Example Embodiment

[0031] The present invention relates to a method of preparing a dry electrode plate comprising a step of preparing a mixed material having a fibrillation of a raw material powder, a mixture, a mixture, a prefraction, and a pole powder powder The step of obtaining the electrode plate after processing is processed.

[0032] The method of preparing the dry electrode plate of the present invention has high degree of fibrosis to which the material fibrosis obtained is high after hyperi-high-speed agitation or polishing, and it is uniformly pinched, and this high fibrosis is gently pinched. The material is first slowly stir, and then quickly agitated, and the agglomerate of small particles can be obtained. The material is filtered, and the screening of the particles after the screening can be directly entered the roller press. Self-supporting film strength is better, you can directly collect.

[0033] Based on the above design idea, the method of preparing the dry electrode plate of the...

Example Embodiment

[0063] Example 1

[0064] The positive electrode active material NCM811 (NCM representing the main component of nickel, cobalt, manganese, and 811 is represented by the ratio of the three components of 8: 1: 1) accounting for 92% by weight, the proportion of the conductive agent, 2% by weight of SP activated carbon accounted for 2% by weight of the conductive agent, the binder proportion accounted for 4% by weight of PTFE, the negative electrode active material accounted for 97% by weight Gr, the proportion by weight of the conductive agent 1% SP, accounted for 2% by weight of PTFE binder the mixing proportion and fibrosis.

[0065] The height of the obtained material for fibrosis "binder fibrosis regulation process", i.e. material into the meniscus slow stirring blade type mixer for 3 minutes, with rapid stirring for 1 minute, then the material is sieved through 18 mesh screen after the regulation of the sieved material obtained.

[0066] After the regulation of the material into...

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Abstract

The invention provides a preparation method of a dry-method electrode pole piece, an electrode pole piece and a battery cell. The preparation method of the dry-method electrode pole piece comprises the following steps of preparing a fibrillated mixed material from raw material powder, stirring and sieving the mixed material to obtain pole piece powder, and processing the pole piece powder to obtain the electrode pole piece. According to the preparation method of the dry-method electrode pole piece, the material fibration degree before feeding can be regulated and controlled by stirring and sieving the mixed material, so that the thickness of a rolled film is regulated and controlled, and the problems of poor uniformity and poor neatness of the film are solved, so that the electrode pole piece prepared by the method is used for preparing a battery cell, and the quality and the performance of the battery cell are favorably improved.

Description

technical field [0001] The invention relates to the technical field of battery preparation, in particular to a method for preparing dry-process electrode pole pieces, and at the same time, the invention also relates to an electrode pole piece prepared by applying the method, and an electric core prepared from the electrode pole piece. Background technique [0002] The current dry electrode preparation technology only needs to mix the active material with the binder and then carry out hot rolling to complete the preparation of the electrode sheet. The preparation process does not require the addition of NMP solvents and the drying recovery process, which not only greatly simplifies The preparation process of the pole piece can greatly reduce the cost of battery manufacturing, and at the same time, there is no use of harmful solvents in the whole process, which also solves the problem of environmental pollution caused by the battery manufacturing process. [0003] However, thi...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/139H01M4/13H01M10/052
CPCH01M4/04H01M4/0435H01M4/139H01M4/13H01M10/052Y02E60/10
Inventor 肖强蔡挺威秦士林张耀法张超马忠龙
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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