Lithium battery injection and formation vacuuming integrated device

Abstract

The invention discloses a lithium battery injection and formation vacuuming integrated device, which is mainly formed by an injection pipeline, a vacuuming pipeline, double-open pistons, a conduit and a program control part, wherein the injection pipeline and the vacuuming pipeline are arranged in two rows, and four to eight double-open pistons are connected onto the injection pipeline and the vacuuming pipeline which are mutually independent. The lithium battery injection and formation vacuuming integrated device is used for flexibly packaged lithium battery injection and formation vacuuming, and can be operated automatically; the working processes are simplified, electrolyte is prevented from being directly contacted with air, and the influence of water on performances of a battery is reduced; and simultaneously, due to formation vacuuming, air generated in the battery during a charging process can be thoroughly discharged, an insulation area is eliminated, the capacity of the battery is improved, and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention relates to production equipment for flexible packaging lithium-ion batteries, in particular to an integrated device for liquid injection, formation and vacuuming of lithium batteries. Background technique [0002] In recent years, due to the advantages of high working voltage, high energy density, long cycle life, no memory effect, no environmental pollution, and high current charging and discharging, lithium-ion batteries have been widely used in portable electronic products, electric toys, electric vehicles, and large power plants. The fields of power supply and energy storage have been developed by leaps and bounds. [0003] The liquid injection and chemical formation process play a vital role in the production process of lithium batteries, which determine various performances such as the film formation status and cycle life of the battery. In the existing lithium battery enterprises, the liquid injection and formation of the batter...

AI Technical Summary

Problems solved by technology

In the existing lithium battery enterprises, the liquid injection and formation of the battery are almost carried out in separate processes. Since the electrolyte and water are prone to react, water control has become the top priority. Therefore, the environmental requirements of the battery workshops of various lithium battery manufacturers are compared. Strict, according to the formation method, the battery is divided into two types: vacuum type or air bag type. The environmental requirements for the liquid injection and formation process of the two are as follows. ≤-30°C in a drying room, the PP tube needs to be inserted and pulled out during the formation, which inevitably makes the inside of the battery come into contact with the outside world, so there are certain requirements for the temperature and humidity of the formation workshop, that is, the ambient temperature is 15°C to 35°C, and the humidity is ≤40 %; airbag type: open-mouth injection is used, and the requirements for the injection environment are more stringent. The temperature of the drying room is required to be 20±5°C, and the dew point is ≤-40°C. The influence of the battery, and the process steps are cumbersome, which not only increases the manufacturing cost of the battery cell, but also affects the quality of the battery

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