A kind of electrolyte injection method of lithium battery

Abstract

The invention discloses an electrolyte injection method for a lithium battery, comprising steps: the first step, injecting the electrolyte into the battery air bag: for a battery that needs to be injected with the electrolyte, open the battery air bag, and insert the liquid injection needle into the battery air bag; Then inject the electrolyte into the battery bag to obtain the battery that has been injected into the battery air bag; the second step, the battery air bag is once sealed: the top of the battery air bag is sealed for the first time; the third step is to squeeze the battery air bag : For the battery air bag that has been packaged for the first time at the top, slowly squeeze it from top to bottom toward the battery body, so that the electrolyte in the battery air bag is squeezed into the area of ​​the battery body; the fourth step, the battery gas Bag cutting: cut off the first sealing position on the top of the battery air bag; the fifth step, the battery is placed under negative pressure; the sixth step is the second sealing of the battery air bag. The invention can allow the electrolyte in the battery air bag to smoothly enter the battery main body, thereby ensuring the working performance of the finally prepared lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium battery production, in particular to an electrolyte injection method for a lithium battery. Background technique [0002] At present, lithium-ion batteries have the advantages of high working voltage, high specific energy, long cycle life, and no environmental pollution. They are not only widely used in mobile communication equipment and portable electronic equipment, but also widely used in electric vehicles, electric bicycles and Power tools and other large and medium-sized electric equipment. [0003] Lithium-ion batteries mainly include square, round, polymer and other types. Among them, the outer packaging of polymer batteries is soft aluminum-plastic film. With the gradual increase of battery thickness, there are more and more polymer batteries that require double-sided shelling of aluminum-plastic films. For the existing aluminum-plastic film double-sided flushing battery, the electrolyte...

AI Technical Summary

Problems solved by technology

For the existing aluminum-plastic film double-sided flushing battery, the electrolyte in the battery air bag often cannot enter the battery body smoothly during the liquid injection process, making it difficult for the electrolyte to infiltrate the battery body, making battery production difficult. Affect the working performance of the battery

[0004] In addition, the current demand for Bluetooth devices is increasing day by day. Due to the small size of the small batteries used in Bluetooth devices, it is difficult for the electrolyte in the battery air bag to flow into the main body of the battery during the liquid injection process, and often remains in the battery. In the battery air bag, the electrolyte is prone to overflow during packaging, causing pollution

Images