Positive/negative pole roll stocked with insulation layer for lithium ion battery

Abstract

The invention discloses a positive / negative pole roll stocked with an insulation layer for a lithium ion battery. The positive / negative pole roll is a multi-layer lamination plate comprising a substrate, an adhesive layer and the insulation layer, wherein a single surface of a current collector of the substrate is uniformly coated with the adhesive layer, and the insulation made of ceramic is coated on the cured adhesive layer. With the structure, the advantages of high insulation performance and high melting point of ceramic are fully developed, no diaphragm is needed among lamination layers of the pole roll of a product with a substituted structure, two aspects are generated, on one hand, a potential risk is eliminated, on the other end, the lamination structure of the pole roll of the lithium ion battery is simplified, and the assembly efficiency is improved; and more importantly, by the structure, the insulation level among the pole roll layers is greatly improved, thus, the energy density is improved, and the usage safety of the lithium ion battery is enhanced.

Description

technical field [0001] The invention relates to a lithium-ion battery accessory, in particular, the invention relates to a lithium-ion battery positive and negative pole roll, especially a lithium-ion battery positive and negative pole roll equipped with an insulating layer. Background technique [0002] Traditional lithium-ion batteries are mainly composed of positive electrode rolls, negative electrode rolls, separators, electrolytes, and casings. In the structure, the diaphragm of insulating material is interposed between the positive pole roll and the negative pole roll. Polyolefin materials are usually used to make diaphragms in this industry. This plastic has certain mechanical strength and good insulation performance, which can fully meet the supporting requirements of lithium-ion batteries operating under normal conditions. Lithium-ion batteries used in reality have occasional accidents, such as internal short circuit, external overcharge or short circuit, all of wh...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problem of poor heat resistance between the positive and negative electrode coils of lithium ion batteries in the prior art, and proposes a laminated composite structure with simple and reasonable structure, strong adhesion and thermal stability. Positive and negative pole rolls of lithium-ion batteries with insulating layers and good safety performance

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