Manufacturing method of lithium ion battery electrode sheet
A lithium-ion battery and manufacturing method technology, applied in electrode manufacturing, battery electrodes, electrode rolling/calendering, etc., can solve the problems of low scraper efficiency, easy broken strips of small strips, and powder drop of cathodes, etc. Improve the quality rate, improve the efficiency of production, improve the effect of safety performance
Active Publication Date: 2020-09-04
惠州锂威新能源科技有限公司
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Problems solved by technology
[0005] The object of the present invention is to: aim at the deficiencies of the prior art, and provide a kind of manufacturing method of lithium-ion battery pole piece, by this method can effectively solve the powder dropping problem of cathode piece when slitting and small strip pole piece roll The problem of easy belt breakage and low scraping efficiency during the pressing process
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[0033] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.
[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", horizontal" etc. are based on th...
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Abstract
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a manufacturing method of a lithium ion battery electrode sheet. The manufacturing method comprises the following steps: 1, stirring electrode sheet slurry to obtain an electrode sheet, and coating the electrode sheet; 2, carrying out multi-station scraping on the coated electrode sheet, and removingthe coating at a welding position on the electrode sheet; 3, after the scraping is finished, rolling the electrode sheet, so that the electrode sheet and the coating are tightly compacted; and 4, after the electrode sheet is rolled, slitting the electrode sheet according to the specification of the electrode sheet to obtain a plurality of small electrode sheet strips. Compared with the prior art,the method of the invention has the advantages that the electrode sheet is firstly subjected to multi-station scraping and then is subjected to rolling and slitting, so that the problem that the edgeof the electrode sheet is easy to drop powder when the electrode sheet is not subjected to rolling and slitting in the traditional process is solved, the safety performance of a battery product is improved, the problem that a small electrode sheet is easy to break due to poor ductility during rolling is also solved, and the excellent rate of products and the production efficiency are effectivelyimproved.
Description
technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a method for manufacturing pole pieces of lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in various industries due to their high working voltage, high energy density, long cycle life and no memory. [0003] In the production process of lithium-ion batteries, welding the battery tabs to the center of the cathode plate can significantly improve the charging efficiency of the battery and achieve the effect of fast charging. Before welding, it is usually necessary to remove the cathode coating at the welding area on the cathode sheet, so that the cathode sheet and the tab can be welded tightly and firmly. At present, the scraping technology of the cathode sheet coating has become mature, and the welding coating on the cathode sheet can be effectively removed through the scraping process. Among them, the manufactur...
Claims
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Login to View More IPC IPC(8): H01M4/139H01M4/04H01M10/0525
CPCH01M4/139H01M4/0402H01M4/0435H01M10/0525Y02E60/10
Inventor 洪春林郑松斌张旭纪荣进李聪郑明清陈杰李载波杨山
Owner 惠州锂威新能源科技有限公司