Preparation method of battery cell structure and battery cell structure

Abstract

The invention discloses a preparation method of a battery cell structure and the battery cell structure, and belongs to the technical field of batteries. The preparation method of the battery cell structure comprises the following steps of: S1, coating one surface of a collector plate with positive electrode slurry and drying to form a positive electrode plate; S2, wrapping the positive plate with a diaphragm; S3, cutting to obtain a negative electrode plate of which the width is the same as that of the positive electrode plate and the length is smaller than a preset positive electrode plate length value; S4, folding the positive electrode plate and the diaphragm in half, so that the length of the positive electrode plate is halved, the coating surface of the positive electrode plate is arranged inwards, and the coating surface is the surface, coated with the positive slurry, of the positive electrode plate; S5, inserting the negative electrode plate between the two layers of contacted diaphragms to enable the diaphragms to be arranged between the coating surfaces of the negative electrode plate and the positive electrode plate so as to obtain an assembly body; and S6, bending the assembly body to obtain the battery cell structure. According to the preparation method of the battery cell structure and the battery cell structure provided by the invention, the loss of active materials can be reduced, and the space utilization rate is relatively high.

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...

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Problems solved by technology

[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 of 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; Utilization of the internal space of the battery, resulting in an increase in the thickness of the battery

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