Lithium-ion power battery tab

Abstract

The invention relates to a lithium-ion power battery tab, which comprises a metal conductor strip and a tab rubber block. The edge part of the longer end of the metal conductor strip is provided with a hole. The hole is U-shaped and the two sides of the U-shaped hole are parallel to each other. The top end of the U-shaped hole is circular arc-shaped. One or more U-shaped holes can be arranged to fix battery tabs according to the width of the metal conductor strip. No laser welding operation is required in an electrical core factory when batteries are to be grouped, wherein screws directly pass through U-shaped holes and pressing plates to tightly lock the tabs of the batteries as a whole. In this way, the equipment investment of large laser welding equipment is saved. Meanwhile, the operation is convenient and the effect is obvious. The virtual welding is avoided, and the production cost is lowered. The production efficiency is improved.

Description

technical field [0001] The invention relates to the field of lithium ion battery materials, in particular to a lithium ion power battery tab. Background technique [0002] At present, lithium-ion power batteries have the advantages of high voltage, high energy density, and many cycles, and are widely used in electric vehicles, electric buses, electric bicycles and other electric equipment. In the production of electric vehicle batteries, battery combination connection is also the most critical link. At present, the most widely used is to use laser to weld the positive and negative tabs of the battery cells together in series or in parallel, but laser welding is the largest The disadvantage is the sensitivity of the focal length. When the distance from the laser head to the welding point changes slightly, the strength and effect of the welding will change accordingly, which will lead to inconsistent welding strength of the battery pack, and even the possibility of virtual wel...

AI Technical Summary

Problems solved by technology

In the production of electric vehicle batteries, battery combination connection is also the most critical link. At present, the most widely used is to use laser to weld the positive and negative tabs of the battery cells together in series or in parallel, but laser welding is the largest The disadvantage is the sensitivity of the focal length. When the distance from the laser head to the welding point changes slightly, the strength and effect of the welding will change accordingly, which will lead to inconsistent welding strength of the battery pack, and even the possibility of virtual welding, giving The battery poses a safety hazard. In addition, because the tab conductor used in the power battery is not only wide but also thick, a high-power laser welding machine is required to ensure that the welding strength meets the requirements, which will undoubtedly increase investment

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