A kind of preparation method of electric core structure and electric core structure

A cell and one-sided technology, applied to structural parts, battery electrodes, non-aqueous electrolyte storage batteries, etc., can solve the problems of restricting battery capacity and battery power, reducing the utilization rate of internal space of the battery, and being unable to participate in electrochemical reactions, etc. Effects of loss, cost reduction, and increase in reaction area
CN112635845BActive Publication Date: 2022-04-08武汉昊诚锂电科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
武汉昊诚锂电科技股份有限公司
Publication Date
2022-04-08

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Abstract

The invention discloses a method for preparing a cell structure and the cell structure, which belong to the technical field of batteries. The method for preparing the cell structure includes S1, coating a positive electrode slurry on one side of a current collector and drying it to form Positive electrode sheet; S2, wrapping the diaphragm outside the positive electrode sheet; S3, cutting the negative electrode sheet with the same width as the positive electrode sheet and less than the preset length of the positive electrode sheet; S4, folding the positive electrode sheet and separator in half so that the length of the positive electrode sheet Halved, and the coating surface of the positive electrode sheet is set inwardly, and the coating surface is the side that the positive electrode sheet is coated with the positive electrode slurry; S5, insert the negative electrode sheet between the two layers of diaphragms that are in contact, so that the negative electrode sheet and the positive electrode sheet There is a diaphragm between the coated surfaces of the coating, and then an assembly is obtained; S6, the assembly is bent to obtain a cell structure. The preparation method of the cell structure and the cell structure provided by the invention can reduce the loss of active materials and have a high space utilization rate.
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Description

technical field

[0001] The invention relates to the technical field of batteries, in particular to a method for preparing a cell structure and the cell structure. Background technique

[0002] Lithium-manganese flexible packaging batteries have the advantages of customization, portability and high energy density, and are widely used in the field of electronic equipment.

[0003] In the prior art, unlike lithium-ion batteries, lithium-manganese flexible packaging batteries use soft and easily deformable metal lithium as the negative electrode. Therefore, a wound-type battery manufacturing process is required, which greatly restricts battery capacity. And the power of the battery, and the battery core with the winding structure has the problem that the material in the outermost ring of the winding body cannot participate in the electrochemical reaction. This phenomenon will cause two adverse consequences, one is the loss of active materials; The utilization of the internal sp...

Claims

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