A lithium-ion battery series closed-port formation equipment

Abstract

The invention discloses a lithium-ion battery series closed-end forming device, which includes a box body, a primary pre-forming module, a secondary pre-forming module, an active self-management forming module and a charging module, a primary pre-forming module, a secondary pre-forming module, The active self-management formation module and the charging module are set in the box, and the primary pre-chemical module is used to decompose the H in the lithium-ion battery 2 O; the secondary pre-formation module is used to form the SEI film of lithium-ion batteries; the active self-management formation module is used to repair the incomplete SEI film; the charging module is used for charging during the battery formation process. The device of the present invention uses an intelligent active self-management balanced charging system to perform series closed-end formation of lithium-ion batteries, and completes the formation, capacity division, and grouping of four semi-finished batteries in the lithium-ion battery at one time. It is 4 times that of ordinary equipment, and the one-time qualified rate of batteries is 95%, which simplifies the formation process of lithium-ion batteries and saves manufacturing costs.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery manufacturing equipment, in particular to a lithium-ion battery series closed-port formation equipment. Background technique [0002] During the first charge and discharge process of a liquid lithium-ion battery, the electrode material and the electrolyte react on the solid-liquid phase interface to form a passivation layer covering the surface of the electrode material. The formed passivation film can effectively prevent solvent molecules from However, Li+ can be freely inserted and extracted through the passivation layer, which has the characteristics of a solid electrolyte, so this passivation film is called "solid electrolyte interface" (solid electrolyte interface), referred to as SEI. [0003] Battery formation is the process of activating the finished battery through a certain charge and discharge system. The traditional formation system will generate gas during the formation p...

AI Technical Summary

Problems solved by technology

This method wastes the aluminum-plastic film, increases the cost of battery production, and the gas generated cannot be completely eliminated, and the formation steps are cumbersome

In addition, the traditional formation process is to charge and form a single battery. The discrete type of the battery is large, and it must be divided into groups to be used later. Industrial application of batteries

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