Cylindrical cell

Abstract

The invention discloses a cylindrical cell, which comprises a shell, an end cover provided with a through hole, a polar column, a dry cell, a cell winding bar and at least one tag. The shell and the end cover are connected to form a cavity; the polar column passes through the through hole on the end cover and one end of the polar column extends out of the end cover; the dry cell, the cell winding bar and the tag are arranged in the cavity; the dry cell is wound on the cell winding bar and is connected with the tag; the cylindrical cell also comprises a current collecting column; the polar column is connected with the current collecting column; and the tag is also connected with the current collecting column. The cylindrical cell has simple structure; and the tag and the polar column are firmly and stably connected, so the stability of the cylindrical cell is improved.

Description

technical field [0001] The invention relates to a battery, especially a cylindrical battery. Background technique [0002] The lugs and poles of cylindrical batteries are generally fixed together by ordinary screwing, riveting and welding, or the poles are provided with connecting pieces, and the lugs and pole connecting pieces are connected by any of the above A fixed connection. Since the lugs and the pole connecting piece are all in the form of thin sheets or thin strips, it is difficult to implement processes such as screwing, riveting and welding, and it is difficult to ensure a firm connection, and the contact resistance at the connection may be increased due to unstable connection , leading to an increase in the internal resistance of the battery, especially when the number of tabs is large, various disadvantages are more prominent. For example, when the battery is connected by ordinary nuts, if the battery is subjected to collision or vibration, the loosening of th...

AI Technical Summary

Problems solved by technology

Since the lugs and the pole connecting piece are all in the form of thin sheets or thin strips, it is difficult to implement processes such as screwing, riveting and welding, and it is difficult to ensure a firm connection, and the contact resistance at the connection may be increased due to unstable connection , leading to an increase in the internal resistance of the battery, especially when the number of tabs is large, various disadvantages are more prominent

For example, when the battery is connected by ordinary nuts, if the battery is subjected to collision or vibration, the loosening of the nuts may cause individual tabs to fall off; when connected by riveting, the tabs are easily deformed, making it difficult to install the battery; the welding process is costly and has a negative impact on equipment and technology. The personnel requirements are high, and it is difficult to ensure that all tabs are firmly welded together

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