A lithium battery bus piece device and a method thereof

Abstract

A lithium battery bus piece device and a method thereof include a sheet-shaped bus piece which is brought into contact with a battery cell of a lithium battery by a bent structure to form a contact portion. The busbar includes a sheet-like intermediate section, opposing sides of the sheet-like intermediate section are integrally connected with a plurality of downward-flipping bending structures mirrored on the two sides, each of the bent structures comprises a sheet-like horizontal section and a sheet-like vertical section of a cuboid structure, the top of the sheet-like vertical section is integrally connected with one side of the bus piece, and the bottom of the sheet-like vertical section is integrally connected with one end of the sheet-like horizontal section; The sheet-like horizontal section is the contact portion. Such a lithium battery bus piece device can stably connect adjacent cells, improve assembly efficiency, reduce production cost, and is difficult to occur virtual welding or spot leakage, so that welding quality is guaranteed, and is conducive to improving the quality of the battery module.

Description

technical field [0001] The invention relates to the technical field of busbars, and also belongs to the technical field of lithium batteries, in particular to a lithium battery busbar device and a method thereof. Background technique [0002] In recent years, the application and development of lithium batteries have been rapid. Lithium batteries are key components in devices such as electric vehicles. Lithium batteries are generally composed of battery modules composed of multiple cells. Its lithium-ion batteries occupy an important place in battery applications due to the characteristics of mature products, stable processes, low cost, and flexible design. Lithium-ion batteries have a very high usage rate in various standardized modules, and are fully used in lithium batteries. In order to obtain a higher operating current, dozens or even hundreds of lithium-ion cells need to be connected through bus bars to form a combination. [0003] In short, lithium batteries are mo...

AI Technical Summary

Problems solved by technology

In the lithium battery module, the battery cell is connected stably by welding with the bus bar. At present, the common way is that the battery cell is connected with the bus bar of nickel material, and the battery module must be connected in series through a copper bar. Connection, such a structure makes the welding method need to weld the nickel sheet and the copper sheet first, and the resulting multiple welding is prone to a false weld somewhere, and it is not easy to be found, especially in the battery pack that uses an assembled bracket. The welding surface cannot reach the same height, and it is more likely to have false welding or spot leakage, so that the welding quality cannot be guaranteed and affect the quality of the battery module.

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