Square lithium-ion battery automatic liquid injection tool

Abstract

The invention provides a square lithium-ion battery automatic liquid injection tool, which comprises a supporting frame, a plurality of liquid injection measuring cylinders, a plurality of branch exhaust pipes, a collecting pipe, a trunk exhaust pipe and a vacuum pump. The multiple liquid injection measuring cylinders are vertically arranged, and the bottoms of the multiple liquid injection measuring cylinders are arranged in a plurality of battery clamp grooves correspondingly and provided with liquid injection nozzles; the tops of the liquid injection measuring cylinders penetrate through atop plate and are movably connected with the top plate; elastic rubber plugs are arranged at the top ends of the liquid injection measuring cylinders, and connecting pipes communicating with the interiors of the liquid injection measuring cylinders are arranged on the elastic rubber plugs; one ends of the multiple branch exhaust pipes communicate with the connecting pipes of the multiple liquid injection measuring cylinders correspondingly, the other ends of the multiple branch exhaust pipes all communicate with the collecting pipe, and rotary valves are arranged at the junctions of the branchexhaust pipes and the collecting pipe; and one end of the trunk exhaust pipe communicates with the collecting pipe, and the other end of the trunk exhaust pipe communicates with the vacuum pump. Theproblems that manual liquid injection is difficult, and an existing tool is inconveniently used can be solved, and the tool is easy to operate, efficient in liquid injection and capable of saving thetime and labor, and has certain practical value.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an automatic liquid injection tool for a square lithium ion battery. Background technique [0002] At present, during the injection process of square lithium-ion experimental batteries, manual injection is still carried out with a syringe. Due to the compact internal structure of the battery, it is difficult to infiltrate the electrolyte, and it is difficult to fill in place at one time. It is necessary to use the syringe to pump repeatedly. Suction and injection, the square casing will expand during multiple injections, eventually resulting in an ultra-thick battery. In addition, the whole process not only consumes a lot of manpower and time, but also the electrolyte is easy to absorb moisture and affect the performance when it is exposed to the environment for a long time. [0003] Although there are various types of battery injection tooling used in the market, ...

AI Technical Summary

Problems solved by technology

[0002] At present, during the injection process of square lithium-ion experimental batteries, manual injection is still carried out with a syringe. Due to the compact internal structure of the battery, it is difficult to infiltrate the electrolyte, and it is difficult to fill in place at one time. It is necessary to use the syringe to pump repeatedly. Suction and injection, the square case will expand during multiple injections, eventually resulting in super thick battery thickness

In addition, the whole process not only consumes a lot of manpower and time, but also the electrolyte is easy to absorb moisture and affect the performance when it is exposed to the environment for a long time

[0003] Although there are various types of battery injection tooling used in the market, there are few simple and practical tooling with high-efficiency liquid injection. Most of them need to be used together with a vacuum box, which requires multiple turnover tooling and batteries. Ineffective, time-consuming and labor-intensive

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