A kind of manufacturing process of multi-tab cell and multi-tab battery

Abstract

The invention relates to the technical field of lithium battery production, in particular to a manufacturing process of a multi-tab battery cell and a multi-tab battery. The present invention has the following steps: A. Coating the active slurry intermittently on the positive electrode sheet and the negative electrode sheet to make the positive electrode sheet and the negative electrode sheet in which the coating area and the blank area are arranged in sequence; B. welding the first positive tab and the first negative tab to the blank area of ​​the positive and negative tabs prepared in step A; C. The electrode sheets prepared in step B are stacked, and the first positive tab and the first negative tab are dislocated; D. Winding the electrode sheet prepared in step C at a certain angle to form a core, and wrapping the first positive tab or the first negative tab on the core; E. Use the winding core as a reel to carry out the winding operation, and weld the second positive tab at the position corresponding to the first positive tab in the blank area of ​​the positive electrode sheet; weld the second negative tab at the position corresponding to the first negative tab in the blank area of ​​the negative electrode sheet; to ensure that all All positive tabs are aligned and all negative tabs are aligned.

Description

Technical field [0001] The invention relates to the technical field of lithium battery production, in particular to a manufacturing process of a multi-pole battery and a multi-pole battery. Background technique [0002] Nowadays, portable electronic products have become an indispensable tool. As the volume of electronic products becomes smaller and smaller, people urgently need batteries with small size, high power, high stability, and high safety to meet the performance of electronic products. Growing demand. Most of the existing lithium ion batteries are made by stacking positive and negative pole pieces, and there is an insulating diaphragm or an insulating coating layer between the positive pole pieces and the negative pole pieces. The pole pieces are coated with an active material layer and connected with tabs. Preferably, the tab should be connected to the electrode sheet by welding. In order to further improve the battery performance, it is necessary to set multiple tabs...

AI Technical Summary

Problems solved by technology

In order to further improve the performance of the battery, it is necessary to set multiple tabs on the pole piece, and it is necessary to ensure that multiple positive tabs can be aligned when winding. The patent application with application number 200910192367.7 provides a spiral multi-tab lithium-ion battery and Its manufacturing method can ensure that multiple positive tabs can be aligned to a certain extent, but through this method, the tabs are formed by die-cutting, and the tabs and electrode sheets cannot be connected by welding, and there is a high risk of lithium precipitation.

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