Battery core with external sheath of wound lithium-ion battery

Abstract

The invention discloses a battery core with an external sheath of a wound lithium-ion battery. The battery core comprises press plates, roll cores, positive plates, negative plates and an adhesive tape, wherein one positive plate and one negative plate which are arranged at an interval are inserted into an inner cavity of each roll core; a laminated installation structure is adopted by the roll cores; each press plate is a rectangular thin plate made of an insulating material and the sizes of long sides and wide sides are at least 1.0mm greater than those of the corresponding sides of the rollcores; one press plate is arranged on each of one upper end surface and one lower end surface of the laminated roll cores; and the adhesive tape is overlapped with the press plates located on the upper layer and the lower layer to form a constraint structure of the press plates on the upper layer and the lower layer on the laminated roll cores. Through the constraint structure, the laminated rollcores are more reliable, thereby facilitating improving the capacity of the battery and prolonging the cycle life of the battery. According to the battery core, the plane of each the press plate is slightly greater than the roll cores, the structure design plays a protecting role when the battery core is enclosed into a shell, and an external insulating layer for the roll cores can be prevented from being bumped without reason, so that the short circuit rate in the production process can be reduced.

Description

technical field [0001] The invention relates to a battery core configured with a wound storage battery. Specifically, the invention relates to a battery core with an external protective layer for a wound lithium ion battery. The technical solution belongs to the technical field of chemical power sources. Background technique [0002] Winding battery is a new type of energy equipment with high integration, high efficiency, safety and reliability. Because its performance is better than that of ordinary structure batteries, it has been widely used in the fields of energy storage, communication and power in recent years. The core component of the wound battery is the battery core. The battery core is usually composed of multiple layers of stacked cores. The size and number of stacked cores are determined according to the rated capacity. In the prior art, when battery cells are assembled, they are usually stacked layer by layer. This assembly form has simple process, large assemb...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the work efficiency of the sequential layering and stacking process is poor. During the installation process, the outer edge of the winding core and the battery case are prone to collisions for no reason. In severe cases, the insulating layer of the winding core is even damaged, which constitutes a safety hazard.

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