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
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[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...
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[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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