Single battery

Abstract

The invention discloses a single battery. The single battery comprises a shell and a cover plate, one of the two ends of the shell in the first direction is open, the other end of the shell is closed,and the cover plate covers the open end; the single battery further comprises an elastic support piece, a first current collecting plate, a battery cell and a second current collecting plate which are sequentially arranged in the shell along a first direction; the elastic support piece is configured to be in a compressed state so as to compress the first current collecting plate, the battery celland the second current collecting plate between the elastic support piece and the closed end of the shell; a first tab and a second tab are respectively arranged at two ends of the battery cell alongthe first direction, are respectively led out from pole piece foils of the battery cell, and are flattened into a flat shape; and the first current collecting plate is propped against the flat firsttab, and the second current collecting plate is propped against the flat second tab. According to the single battery disclosed by the invention, a welding process required by the traditional connection of the tab and the pole is omitted, the material of the pole piece foil is saved, and the production process and the equipment investment are simplified.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a single battery. Background technique [0002] Lithium-ion batteries are widely used in various industries due to their advantages such as low cost, long life, and easy recycling. Commonly used lithium-ion batteries are wound-type batteries, and each positive or negative electrode leads to a tab. Therefore, multiple tabs need to be welded first, and then connected to the pole or through a connecting piece. To connect with the pole, the process is cumbersome and the investment in equipment is large. In order to facilitate welding, the protrusion length of the tab is long, resulting in the use of more pole piece foil materials, which increases the overall production cost of the single battery. Contents of the invention [0003] The purpose of the present invention is to provide a single battery, which can omit the welding process of the tabs, save the materials used for the e...

AI Technical Summary

Problems solved by technology

Commonly used lithium-ion batteries are wound-type batteries, and each positive or negative electrode leads to a tab. Therefore, multiple tabs need to be welded first, and then connected to the pole or through a connecting piece. To connect with the pole, the process is cumbersome and the investment in equipment is large. In order to facilitate welding, the protrusion length of the tab is long, resulting in more materials for the pole piece and foil, which increases the overall production cost of the single battery.

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