A battery and liquid injection method

Abstract

The invention discloses a cell and an electrolyte injection method. The cell comprises a cell rolling core, a shell wrapped outside the cell rolling core, an end cover covering the upper part of the shell, a safety valve hole and an electrolyte injection hole, wherein the safety valve hole is arranged on the end cover, and the electrolyte injection hole is arranged at the lower part of the shell. In the cell, the safety valve hole is arranged on the end cover of the cell, and the electrolyte injection hole is arranged at the lower part of the shell of the cell. When the electrolyte is injected into the cell, the vacuumization is carried out from the safety valve hole, and the electrolyte is injected from the electrolyte injection hole at the bottom of the cell. The electrolyte injection efficiency of the cell is improved obviously, and because the electrolyte injection way that the electrolyte is injected from the bottom of the cell and the vacuumization is carried out at the upper part of the cell is adopted, air bubbles inside the cell are reduced. The infiltration effect of the cell rolling core is good, thus the cell capacity is greatly increased. By using the electrolyte injection method, the electrolyte injection time is shortened effectively, the working efficiency is improved, the infiltration of the cell rolling core is more thorough, the air bubbles between pole pieces can be discharged, and the cell capacity is increased.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery with a safety valve and a liquid injection hole and a liquid injection method thereof. Background technique [0002] Currently common batteries have various forms, such as completely sealed, with a safety valve, with a liquid injection hole for multiple injections, and with both a safety valve and a liquid injection hole. Existing batteries with both a safety valve and a liquid injection hole have both the safety valve and the liquid injection hole set on the top of the battery. At present, the electrolyte injection methods used by manufacturers for this battery include negative pressure method, positive pressure method, Positive and negative pressure mixing method, centrifugation method and vibration method, etc. These liquid injection methods are all from the top of the battery to the bottom. It is also easy to form new air bubbles during the liquid injection proce...

AI Technical Summary

Problems solved by technology

Existing batteries with both a safety valve and a liquid injection hole have both the safety valve and the liquid injection hole set on the top of the battery. At present, the electrolyte injection methods used by manufacturers for this battery include negative pressure method, positive pressure method, Positive and negative pressure mixing method, centrifugation method and vibration method, etc. These liquid injection methods are all from the top of the battery to the bottom. In the process of liquid injection, new air bubbles are easy to form, resulting in incomplete penetration of the electrolyte, reduced battery capacity, and slow liquid injection speed.

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