Soft-packing lithium battery vacuum liquid injecting device

Abstract

The invention discloses a soft-packing lithium battery vacuum liquid injecting device which comprises a fixing plate, a lifting air cylinder, a vacuum cavity, a lithium battery clamp, a plurality of liquid injecting mechanisms and a plurality of sucking disc mechanisms, wherein the vacuum cavity is positioned below the fixing plate, and opens downwards; the lithium battery clamp is positioned below the vacuum cavity; the sucking disc mechanisms are mounted on the vacuum cavity, and are used for opening and closing aluminum plastic films of battery cells in the vacuum cavity; the liquid injecting mechanisms are fixed on the bottom surface of the vacuum cavity; liquid injecting needles stretch into the vacuum cavity in a sealed manner to conduct liquid injection on the battery cells; the lifting air cylinder is fixed on the fixing plate; the output end of the lifting air cylinder faces downwards, and is fixedly connected with the bottom surface of the vacuum cavity, so as to drive the vacuum cavity to move downwards to form a sealed inner chamber with the lithium battery clamp. According to the soft-packing lithium battery vacuum liquid injecting device, the production efficiency of the lithium battery can be improved, and the quality of the battery can be ensured.

Description

technical field [0001] The invention relates to a liquid injection device, in particular to a vacuum liquid injection device for a soft pack lithium battery which improves the production efficiency of the lithium battery and ensures the quality of the lithium battery. Background technique [0002] In the production of soft-pack lithium batteries, the electrolyte needs to be injected into the battery cells. The existing lithium batteries generally use manual liquid injection or automatic liquid injection. However, whether it is manual liquid injection or automatic liquid injection, they are all carried out at atmospheric pressure. However, injecting liquid under normal pressure is easy to generate air bubbles in the battery cell. These air bubbles will occupy the volume of the battery cell and cause insufficient electrolyte injection. If not removed, it will affect the capacity and electrical performance of the lithium battery. Lithium batteries degrade in quality. Therefor...

AI Technical Summary

Problems solved by technology

However, injecting liquid under normal pressure is easy to generate air bubbles in the battery cell. These air bubbles will occupy the volume of the battery cell and cause insufficient electrolyte injection. If not removed, it will affect the capacity and electrical performance of the lithium battery. The quality of lithium batteries has declined

Therefore, in order to clean out the air bubbles in the lithium battery cell, it is generally necessary to let the lithium battery stand still after liquid injection to release all the air bubbles; and the standing time is generally longer, resulting in soft-packed lithium The production efficiency of the battery is very low

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