Battery cell

Abstract

The invention relates to a battery cell for a lithium ion battery. The battery cell comprises a battery cell body, wherein a flow collecting plate is mounted at an end part of the battery cell body; an insulation sleeve is arranged on the periphery of the flow collecting plate; the flow collecting plate comprises a plate body; the plate body comprises a first surface facing to the battery cell body and a second surface opposite to the first surface; the insulation sleeve comprises a first circle, a second circle and a third circle which are successively arranged from inner to outer; the height of the first circle is less than the height of the second circle; the height of the second circle is less than the height of the third circle; the second circle and the third circle both are arranged as closed circles; the first circle is arranged as a non-closed circle; the gradient formed by the first circle, the second circle and the third circle extends along the direction of the first surface toward the battery cell body. According to the invention, the stable connection of the flow collecting plate and the end of the battery cell is realized through the insulation sleeve with such a structure, the battery cell is difficult to shake or fall off and the insulation protection for the battery cell is effectively realized.

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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