Electric core connecting sheet, battery and assembling method

Abstract

The invention discloses an electric core connecting sheet, a battery and an assembling method. The electric core connecting sheet comprises a body, an electric core connecting portion and a solderingconnecting portion. The electric core connecting portion is disposed on one side of the body and electrically connected with the tab of the electric core. The soldering connecting portion is disposedon the other side of the body, electrically connected to the pole of the battery, and bendable relative to the body. By providing the electric core connecting portion on the electric core connecting sheet, the tabs of the electric core can be soldered and fixed to the electric core connection portion, thereby realizing the early current collection of the positive and negative electrodes of the electric core, preventing the positive and negative of all the electric cores from being directly welded on the poles of the battery, and at the same time, ensuring the overcurrent capability of each connection position during the current collecting process of the battery. In addition, the welding connection portion on the electric core connecting sheet is connected with the pole of the battery, thereby finally realizing the current collection of the positive and negative electrodes of the plurality of electric cores, avoiding the welding difficulty caused by the excessive number of the tabs welded on the pole and improving the 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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