Preparation method of liquid lithium ion pole piece battery pack

Abstract

The invention discloses a preparation method of a liquid lithium ion pole piece battery pack. The preparation method comprises the following steps: 1, preparing a pole piece capacity unit; 2, preparing a to-be-injected activated lithium ion pole piece battery pack; 3, injecting a lithium ion electrolyte; 4, performing activation; and 5, after activation, forming a filling type sealed packaging shell for completely sealing and packaging the periphery of the exterior of the battery pack and filling all residual spaces in the battery pack through filling type sealed packaging, so as to realize the isolation of the battery pack from the external environment and the fixation of components of the battery pack, thereby obtaining the liquid lithium ion pole piece battery pack. Compared with the complex traditional process route, the traditional battery pack manufacturing process is simplified into stacking, welding, liquid injection, activation and packaging, so that the process route is shortened, the productivity is improved, the preparation of the battery pack is easier to control, meanwhile, the series formation of the whole battery pack in the same environment is realized, the consistency between single battery cells is improved, and the performance of the battery pack is improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a method for preparing a liquid lithium ion pole piece battery pack. Background technique [0002] With the promotion and application of new energy vehicles and 5G technology, the intelligent society has entered people's daily life, and the demand for off-grid energy storage power supply is increasing, and the quality requirements are getting higher and higher. As an energy storage device, batteries have attracted much attention for their safety, service life, and life-cycle cost. Liquid leakage, fire, attenuation, low energy density, and high cost exposed by liquid lithium-ion batteries have become important bottlenecks in its application. [0003] The ultimate application of battery products, especially power supplies and energy storage supplies, is battery packs. The preparation of traditional battery packs requires the production of single cells first. The single ...

AI Technical Summary

Problems solved by technology

This production process is not only cumbersome, but also leads to poor consistency of the finished battery, and a large number of connectors are required in the process of forming a module and a package, resulting in traditional battery packs with many components, high material consumption and energy consumption, low energy density and power consumption. Low density, poor consistency of single cells, short cycle life, complex and cumbersome preparation process, low production efficiency, high manufacturing cost and other shortcomings, so the technical threshold for its production and preparation is high, which is not conducive to industrialization promotion

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