Hard-shell encapsulation structure of lithium-ion battery and processing method of hard-shell encapsulation structure

Abstract

The invention discloses a hard-shell encapsulation structure of a lithium-ion battery and a processing method of the hard-shell encapsulation structure. The encapsulation structure is formed by a substrate, a fence and a buckling cover, wherein the substrate is provided with positive and negative lug leading-out grooves and expansion grooves of leading-out ends of the positive and negative lug leading-out grooves; the substrate between the two lug leading-out grooves is provided with two groups of radial grooves into which positive and negative pole-plate current collectors are embedded alternately and which are uniformly spaced; the peripheries of the positive and negative lug leading-out grooves of the substrate are provided with rectangular fence embedment grooves; the bottom surface ofthe fence is provided with bosses which are in interference fit with the fence embedment grooves; the bosses are provided with cambered-surface grooves which are corresponding to the corresponding lug leading-out grooves respectively; and the buckling cover is in interference fit with the outer edge of the fence. The substrate, the fence and the buckling cover in the formation of the hard-shell encapsulation are prepared from a photosensitive resin material and are printed for one-time molding through a photocuring 3d (three-dimensional) printer; molded parts of the hard-shell encapsulation structure are photosensitive resin primary-color transparent bodies; and the radial grooves are in transition fit with the embedded laser-cut positive and negative current collectors, namely an aluminum sheet and a pure copper sheet. The hard-shell encapsulation structure has the outstanding advantages of being convenient to process and assemble, saving working time and being suitable for scale production.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a lithium-ion battery hard case packaging structure and a processing method thereof. Background technique [0002] The development of battery packaging technology has a long history. The current commercial lithium batteries are two-dimensional lithium batteries, that is, the positive and negative pole pieces are stacked in parallel or wound structure. The disadvantage of this structure is that there is a contradiction between energy density and power density. , that is, in order to improve the battery capacity and energy density, the more active materials coated on the electrode sheet, the better, because the battery capacity is related to the total amount of active materials participating in the electrochemical reaction, but as the thickness of the active material increases, lithium ions in The increased transmission distance in the electrodes leads to lower power density an...

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve the technical problems of cumbersome steps and time-consuming operation in the hard shell packaging of existing three-dimensional lithium batteries, and discloses a hard shell packaging of lithium ion batteries structure and processing method

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