Current collector for steel-shell cylindrical full-tab battery and steel-shell cylindrical full-tab battery

Abstract

The invention relates to the technical field of batteries, and provides a current collector for a steel-shell cylindrical full-tab battery and the steel-shell cylindrical full-tab battery. The current collector comprises a positive current collector, a part of the main body of the positive current collector is provided with a first welding seam and a second welding seam, and the first welding seam and the second welding seam are used for welding the part of the main body of the positive current collector on the positive end face of a roll core of the battery; the first welding seam coincides with the diameter of the roll core and is located below the second welding seam, and the second welding seam is located above the center hole of the roll core to form a bending part which is used for bending the other part of the main body of the positive current collector to the inner side of the roll core; the current collector further comprises a negative current collector which is provided with a third welding seam, and the third welding seam coincides with the diameter of the roll core and is used for being welded to the negative end face of the roll core. Automatic production can be achieved, the welding seams are welded to the diameter of the roll core, the current collecting effect is effectively improved, the internal resistance of the battery is reduced, the welding seam track is simple, and the welding production efficiency is high.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a current collector for a steel-case cylindrical full-tab battery and a steel-case cylindrical full-tab battery. Background technique [0002] At present, cylindrical batteries are very popular in the two-wheeler market, among which all-tab batteries are favored by the market due to their low cost and good rate performance. The safety performance of steel shell batteries is better than that of aluminum shell batteries, and the volumetric energy density is higher than that of aluminum shell batteries of the same size. However, most of the all-tab batteries on the market are mainly cylindrical aluminum shells, and the current collector of the aluminum shell is assembled with the cap, so it is not suitable for steel shells. In addition, the current collector of the aluminum shell is a separate finished product made by stamping. The unit price is high, the structure is relatively ...

AI Technical Summary

Problems solved by technology

However, most of the full-tab batteries on the market are mainly cylindrical aluminum shells, and the current collector of the aluminum shell is assembled with the cap, so it is not suitable for steel shells.

In addition, the current collector of the aluminum shell is a separate finished product made by stamping. The unit price is high, the structure is relatively complicated, the welding is cumbersome, the current collection effect is poor, it is not suitable for automatic welding equipment feeding and welding, and the production efficiency is low.

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