Lithium-ion battery electrolyte filling device

Abstract

The invention relates to an electrolyte filling device, and in particular relates to a lithium-ion battery electrolyte filling device. The lithium-ion battery electrolyte filling device comprises a battery cell, an insulation plate, an upper cover and a shell, and is characterized in that a plurality of small holes are uniformly formed in the insulation plate, the insulation plate is closely attached to the upper part of the battery cell inside the shell, grooves of the insulation plate clamp the edges of lugs on the battery cell and is fixed on the edges of the lugs, a post base of the upper cover is arranged between the two lugs, and the upper cover is tightly connected with the lugs on the battery cell through bolts. The battery cell is firmly wrapped by a wide adhesive tape, the entire battery cell is arranged in the shell, and the battery cell and the shell are closely assembled. By adopting the lithium-ion battery electrolyte filling device, the internal structure of a battery is improved, and the phenomenon that the stress of the battery cell is non-uniform can be reduced. The small holes in the insulation plate are uniformly formed and used for guiding electrolyte to enter the battery cell in a balance manner. The realization way is simple, no equipment investment is increased, the application cost is low, and the lithium-ion battery electrolyte filling device is easy to realize.

Description

technical field [0001] The invention relates to a battery liquid injection device, in particular to a lithium ion battery liquid injection device. Background technique [0002] At present, power vehicle batteries mainly use large-capacity lithium-ion power batteries, which have the advantages of high energy density and long life. Although the technology and material selection are constantly improving, there are still areas to be improved: the electrolyte is too concentrated during the liquid injection process. It is not convenient for the cells to absorb the electrolyte evenly. The existing liquid injection method is to put the battery directly on the liquid injection machine to evacuate and inject the liquid once, and the electrolyte is directly injected into the battery cell from the liquid injection port. One-time injection of liquid from the injection hole will cause the battery core to absorb liquid unevenly, and the liquid injection port will absorb a lot of liquid, a...

AI Technical Summary

Problems solved by technology

One-time injection of liquid from the injection hole will cause the battery core to absorb liquid unevenly, and the liquid injection port will absorb a lot of liquid, and the pressure will be high, resulting in changes in the internal structure of the battery.

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