Manufacturing method of soft package battery

Abstract

The invention relates to a manufacturing method of a soft package battery. The manufacturing method comprises the following machining steps: feeding materials; drying; weighing for the first time; injecting; standing; sealing; weighing for the second time; and discharging. According to the method provided by the invention, a battery cell is subjected to vacuum drying, vacuum injection, vacuum standing, vacuum sealing and the like by using a soft package battery vacuum baking, injection and sealing machine; the process is simple, the operation is easy, the production efficiency is high, the automation degree is high and the drying efficiency of the battery cell is high and is about 48 times as much as the drying speed of a vacuum drying room; the drying effect is good, manpower and material resources are saved and the occupied space is small; the steps of injecting, standing and sealing are carried out under a vacuum sealed condition so that moisture in air is prevented from being injected into the battery cell along with electrolyte; and the performance of the soft package battery is guaranteed, the defective percentage is reduced and the economic benefits are improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for manufacturing a pouch battery. Background technique [0002] Soft pack battery is another name for lithium-ion battery. Compared with lead-acid batteries, it has many advantages such as small size, light weight, high specific energy, high safety, and flexible design. [0003] In the production process of the pouch battery, the main body of the pouch battery needs to be dried before the electrolyte is injected. Because the separator in the main body of the pouch battery is not resistant to high temperature, the drying temperature should not be too high. As we all know, under normal pressure, the evaporation temperature of water is above 100°C, and the separator in the main body of the pouch battery is easy to deteriorate when it is above 90°C, the performance of the battery will decrease, and the capacity will become smaller, resulting in an increase in the defectiv...

AI Technical Summary

Problems solved by technology

The drying method for the main body of the pouch battery has the following defects: the cost of establishing a vacuum drying room is high, the operating cost is high, the space occupied is large, the drying time is long, the cost is high, the production efficiency is low, and the economic benefit is poor

A small amount of moisture in the environment will be injected into the battery cell along with the electrolyte, and excess moisture will reduce the performance of the battery, increase the rate of defective products, increase production costs, and reduce economic benefits. There is a need for improvement