a cell

Abstract

The invention relates to a battery cell for a lithium-ion battery, which includes a battery cell body, a collector plate is installed at the end of the battery cell body, and an insulating sleeve is arranged around the collector plate; the collector plate includes a disc body, the disc body includes a first surface facing the cell body and a second surface opposite to it; the insulating sleeve includes a first ring body, a second ring body and a third ring body arranged in sequence from the inside to the outside, so The height of the first ring body is smaller than the height of the second ring body, the height of the second ring body is smaller than the height of the third ring body, and the second ring body and the third ring body are closed ring bodies, The first ring body is a non-closed ring body, and the gradient formed by the first ring body, the second ring body and the third ring body extends along the first surface toward the cell body. The invention realizes the stable connection with the current collecting plate and the end of the electric core through the insulating sleeve of the structure, is not easy to shake or fall, and effectively realizes the insulation protection for the electric core.

Description

technical field [0001] The invention relates to an electric core, which belongs to the technical field of lithium ion batteries. Background technique [0002] Lithium-ion battery is a secondary battery (also known as rechargeable battery), in the process of charging and discharging, Li + intercalation and deintercalation back and forth between the two electrodes; when charging, the Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. The development of telecommunications and information markets, especially the extensive use of mobile phones and notebook computers, has brought market opportunities for lithium-ion batteries. Among the currently commercialized secondary batteries, the lithium-ion battery has the highest specific energy, which can realize the thinning of the secondary battery; in addition, because the lit...

AI Technical Summary

Problems solved by technology

[0006] 1. The structure of the insulating device is complicated and the cost is high, and the end fixed on the cell body is not stable enough, and it is easy to shake or fall;

[0007] 2. The current guiding device of the battery is generally a strip-shaped metal strip, and the current is derived from the strip-shaped metal strip. When installing this type of current guiding device, the strip-shaped metal strip must be welded on the battery cell body one by one. The welding is very inconvenient. And the distribution of diversion points is very uneven, resulting in poor diversion performance of the battery

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