Electrolyte filling system and electrolyte filling method

Abstract

The invention discloses an electrolyte filling system and an electrolyte filling method. The electrolyte filling system comprises an electrolyte container, a primary liquid storage tank, a secondary liquid storage tank, a filling nozzle, a circulating pump and a filling pump, wherein the electrolyte container is used for storing electrolyte and outputting the electrolyte through pressurization of a pressurizing unit; the primary liquid storage tank is connected with the electrolyte container by a pipeline, and stores the electrolyte supplied by the electrolyte container; the secondary liquid storage tank is connected with the primary liquid storage tank by the pipeline and stores the electrolyte supplied by the primary liquid storage tank; the filling nozzle is connected with the secondary liquid storage tank by the pipeline and used for filling the electrolyte in the secondary liquid storage tank into a battery enclosure; the circulating pump is arranged on the pipeline between the primary liquid storage tank and the secondary liquid storage tank, and used for supplying the electrolyte in the primary liquid storage tank to the secondary liquid storage tank; the filling pump is arranged on the pipeline between the secondary liquid storage tank and the filling nozzle and used for supplying the electrolyte in the second liquid storage tank to the filling nozzle; the electrolyte filling system further comprises a circulating tube for enabling gas and electrolyte escaped from the secondary liquid storage tank to flow to the primary liquid storage tank.

Description

technical field [0001] The invention relates to a liquid injection system and a liquid injection method for injecting electrolyte into batteries such as lithium batteries. Background technique [0002] Lithium batteries are widely used due to their small size and large capacity. A lithium battery is manufactured by housing an electrode plate group in a battery case, injecting an electrolytic solution, and sealing the opening of the battery case in an airtight state. [0003] As recorded in Patent Document 1, the existing electrolyte injection system such as the attached Figure 4 The sequence shown includes: an electrolyte container 1 filled with electrolyte, a flow meter 2, an air control valve 3, a liquid storage tank 4, a valve 5, a quantitative liquid injection pump 6, a liquid injection nozzle 7, and pipelines. Nitrogen gas is passed into the electrolyte container 1 to pressurize, the pneumatic valve is opened, and the electrolyte is pressed into the liquid storage tan...

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Problems solved by technology

[0007] But above-mentioned patent document 1~3 all do not relate to how to reduce

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