Liquid injection mechanism and device

Abstract

The invention discloses a liquid injection mechanism and device and relates to the technical field of cell manufacturing. The liquid injection mechanism includes a liquid injection cylinder and a piston, wherein the liquid injection cylinder includes a liquid injection section and a pressure relief section which are communicated with each other, the diameter of the pressure relief section is larger than the diameter of the liquid injection section, the liquid injection section is used for communicating with a to-be-injected cell, the piston is disposed in the liquid injection cylinder and is movable in the liquid injection section and the pressure relief section, and the piston is sealingly matched with the liquid injection section to cooperate with the pressure relief section. The liquidinjection mechanism is advantaged in that the liquid injection mechanism is convenient for pressure relief, is stable for liquid injection and is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a liquid injection mechanism and a liquid injection device. Background technique [0002] The high-speed technological innovation of lithium-ion and other batteries has promoted the rapid development of the new energy vehicle industry. Liquid injection is an important process in the production of most batteries. The design and process level of this process directly affect the appearance and electrical performance of the battery. At present, the application of automated and intelligent operation technology has been quite mature and extensive. [0003] However, the complex automation process, pipeline design and environmental control of high-capacity liquid injection production lines are not suitable for new product development and design, small and pilot tests. Especially in the process of new electrolyte development and system design, often only a small amount of ...

AI Technical Summary

Problems solved by technology

However, in the process of using the existing liquid injector to inject liquid, as the liquid injection begins, the internal pressure of the shell increases accordingly. If the pressure is released directly, the electrolyte will splash outward from the liquid injection port, causing A large area of ​​pollution and damage, if the pressure cannot be released in time, it will be difficult to continue to inject liquid, which will inevitably cause problems such as shell swelling and deformation

The process is slow, threatening the operators, polluting the main body of the battery cell and the working environment, so that the process stability and reliability of the liquid injection process cannot be guaranteed

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