A kind of cell connecting piece, battery and assembly method

Abstract

The invention discloses a cell connection sheet, a battery and an assembly method. The cell connection sheet includes a body, a cell connection part and a welding connection part. The cell connection part is arranged on one side of the body and is electrically connected to the tab of the cell. The welding connection part is arranged on the other side of the body, electrically connected with the pole of the battery, and the welding connection part can be bent relative to the body. By setting the battery connection part on the battery connection piece, the tabs of the battery can be welded and fixed on the battery connection part one by one, so as to realize the pre-collection of the positive and negative poles of the battery and avoid the positive and negative of all the batteries. The poles are directly welded on the pole of the battery, and at the same time, it can ensure the overcurrent capacity of each connection position during the current collection process of the battery. In addition, the welding connection part on the cell connection piece is connected to the pole of the battery, and finally realizes the current collection of the positive and negative electrodes of multiple cells, which can avoid the welding difficulty caused by the excessive number of tabs welded on the pole. Thereby improving welding quality.

Description

technical field [0001] The invention relates to the technical field of battery structures, in particular to a battery connecting piece, a battery and an assembly method. Background technique [0002] With the development of modern electronic technology, batteries are required to have higher specific energy and better rate performance. In the industry, it is common to use unidirectional multi-pole winding methods to produce high-capacity and large-size batteries to reduce the group structure. High energy density of the battery. The current winding method of unidirectional multi-pole tabs has lower requirements on the connecting piece and the battery, and is easy to realize the production of high-capacity and large-size batteries. However, the winding method of unidirectional multi-pole tabs is difficult to meet the performance requirements of the battery for the fast charging technology that is becoming more and more popular. [0003] In the existing design, it is possible ...

AI Technical Summary

Problems solved by technology

However, in order to increase the energy density of the battery, it is necessary to use a thinner current collector, so that the number of tabs can only be increased to increase the flow capacity requirements of each connection.

Therefore, the commonly used unidirectional tab winding method can no longer meet the above requirements, and it is necessary to develop a bidirectional tab structure and a laminated structure. The welding method and stability of tabs and poles cannot be guaranteed

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