Quick forming method of power type soft packaging polymer battery

Abstract

The invention discloses a quick forming method of a power type soft packaging polymer battery. The quick forming method comprises the following steps of (1), flatly putting the battery in a fixture, and exposing positive and negative lugs; (2), adjusting a pressure plate on the fixture, so that the battery can be pressed by the pressure plate, pressing the surface of the battery, and fixing well by adjusting a limiting screw; (3), respectively connecting positive and negative joints of a forming cabinet to the positive and negative lugs of the battery; (4), putting the battery and the fixture in a high-temperature oven, setting the temperature at 60 DEG C, and charging after carrying out heat preservation for 1h; and (5), taking out the fixture and the battery after charging, adjusting the fixture to further pressurize, pressing the surface of a battery cell, fixing well by adjusting the limiting screw, putting the fixture and the battery in the oven with the temperature of 85 DEG C, taking out the fixture and the battery after keeping for 2-4h, and standing at normal temperature for 24-48h; and completing the forming process after standing. According to the invention, medium and small ratio current formation of the battery is carried out; and the problem that an SEI film is poorly formed due to gas production, uneven contact and the like of a pole piece in the forming process is solved.

Description

technical field [0001] The invention relates to the field of polymer batteries, in particular to a rapid formation method for power-type flexible packaging polymer batteries. Background technique [0002] The long-term use of fossil fuels represented by the three main energy sources of coal, oil, and natural gas has made the energy structure unreasonable and caused serious environmental pollution, especially with the reduction of the reserves of the three major energy sources, and the resulting global warming and The deterioration of the ecological environment has received more and more attention. Therefore, in order to maintain the sustainable development of human society, energy and the environment are two severe problems that must be faced in the 21st century, and the development of clean and renewable new energy is one of the most decisive technical fields in the world economy in the future. As a new type of clean and renewable secondary energy, lithium secondary batter...

AI Technical Summary

Problems solved by technology

The traditional low-current pre-charging method is conducive to the formation of a stable SEI film, but long-term low-current charging will lead to an increase in the resistance of the formed SEI film, which will affect the rate discharge performance of the lithium-ion battery. The long process time will affect the production efficiency. In addition, during the formation process of polymer power batteries, a large amount of other substances will be produced, causing battery expansion, pole piece deformation, and air bubbles between the positive and negative electrodes, etc., which will further affect the formation quality of the SEI film, thereby affecting the cycle performance of the battery. Therefore, It is necessary to explore an efficient lithium battery formation process

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