Laminated type lithium battery core body with extremely high bearing capacity and packaging technique

Abstract

The invention discloses a laminated type lithium battery core body with extremely high bearing capacity and a packaging technique. The battery core body comprises a plurality of battery core pole pieces subjected to lamination, conducting gaskets and two tabs, wherein the conducting gaskets are welded and fixed on the battery core pole pieces; the plurality of battery core pole pieces are stackedin a side-by-side manner from top to bottom and form the core body after being compacted; and the adjacent battery core pole pieces are isolated by a battery core diaphragm. The packaging technique comprises the steps of: 1, lamination of the battery core pole pieces; 2, welding of the conducting gaskets; 3, stacking of the battery core pole pieces; 4, assembly and welding of the conducting gaskets and installation of the tabs; 5, compaction of the battery core body; 6, package of aluminum and plastic membranes; 7, injection of an electrolyte; 8, vacuum packaging under normal temperature or alow temperature; and 9, thermal-plastic packaging. In the laminated type lithium battery core body, the design is reasonable, the structure is simple, the processing and manufacture are convenient, the manufactured lithium battery core body has extremely high vacuum degree and bearing capacity, and the defects that the existing lithium battery core is poor in bearing capacity and short in servicelife and the like when being used for manufacturing a deep-sea direct-dipping battery are overcome.

Description

technical field [0001] The invention belongs to the technical field of deep-sea direct immersion lithium battery pack manufacturing, and in particular relates to a laminated lithium battery core with extremely high pressure bearing capacity and a packaging process. Background technique [0002] With its rich resources, vast space and great regulating effect on the earth's environment and climate, the ocean has become an important part of the global life support system and a valuable asset for the sustainable development of human beings. Marine technology is the premise and main means for revealing the mysteries of the ocean, safeguarding marine rights and interests, developing marine resources, protecting the marine environment, and mitigating marine disasters. Due to the unique role of the ocean and its strategic position in the sustainable development of the country, the country has invested a lot of manpower and financial resources in the research and development of marin...

AI Technical Summary

Problems solved by technology

The current process method is to use a vacuum pump to extend into the cell packaging through the pipeline to extract the air. During this process, the electrolyte will be partially pumped out. At the same time, with the increase of the vacuum degree, part of the gas will be blocked in a certain part of the cell. In some parts, it is difficult to achieve a high degree of vacuum

Such a vacuum process can meet the normal use of lithium battery cells under land pressure, but it is far from meeting the vacuum requirements under high pressure in the deep sea. Such a lithium battery cell will change in volume when the high pressure in the deep sea changes and the pressure on land changes, resulting in The cycle life is greatly shortened

[0006] After many searches, there is no report on the lithium battery core with extremely high intrinsic pressure bearing capacity specially used in deep sea

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