Slice lithium ion battery capable of effectively utilizing battery space

Abstract

Disclosed is a slice lithium ion battery capable of effectively utilizing a battery space. The slice lithium ion battery comprises a positive electrode, a negative electrode and a diaphragm arranged between the positive electrode and the negative electrode, wherein the part, which does not participate in a reaction, of the negative electrode is not coated with an active material; instead, the part of the negative electrode is coated with macromolecule insulating paste; and the thickness of the adhesive is less than that of the active material coated on the single surface of the negative electrode. By adoption of the slice lithium ion battery, the battery space can be utilized effectively, and the capacity and the specific energy of the battery are improved as well; the waste of the active material is avoided, and the cost of the battery is lowered; meanwhile, the scrolling and deformation of the base material in grinding can be avoided, and the slice lithium ion battery is convenient to process; the scrolling and deformation in the grinding process of the electrode plate is effectively avoided due to the manner of coating the insulating paste; and in addition, the thickness and the weight of the paste are both less than that of the coated active material, so that the performance of the battery is not affected, and the safety of the battery can be promoted as well.

Description

technical field [0001] The invention belongs to the field of electric storage devices, and in particular relates to a sheet lithium ion battery which effectively utilizes battery space. Background technique [0002] With the miniaturization of electronic products, the batteries used are getting thinner and thinner. For example, the lithium-ion batteries used in some smart cards are very thin. structure, and both sides of the conductive substrate of the negative electrode are coated with active materials, so that the active materials on the outermost sides of the two negative electrodes do not participate in the reaction, and there are problems of occupying battery space and wasting materials, but if the negative electrode is only coated on one side If the active material is covered, the electrode will curl when it is rolled, which will bring a lot of trouble to the subsequent processing. Therefore, how to design a sheet battery that does not waste materials and does not curl...

AI Technical Summary

Problems solved by technology

[0002] With the miniaturization of electronic products, the batteries used are getting thinner and thinner. For example, the lithium-ion batteries used in some smart cards are very thin. structure, and both sides of the conductive substrate of the negative electrode are coated with active materials, so that the active materials on the outermost sides of the two negative electrodes do not participate in the reaction, and there are problems of occupying battery space and wasting materials, but if the negative electrode is only coated on one side If the active material is covered, the electrode will curl when it is rolled, which will bring a lot of trouble to the subsequent processing. Therefore, how to design a sheet battery that does not waste materials and does not curl when the electrode is rolled has become a technology in the art. subject of research

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