Detachable polymer lithium ion battery and assembling method thereof

Abstract

The invention discloses a detachable polymer lithium ion battery. The detachable polymer lithium ion battery comprises at least two parallel polymer lithium ion battery cells, and an upper stainless steel sheet, a lower stainless steel sheet, a top shell and a bottom shell which are connected fixedly to form a cell containing cavity, wherein the two sides and the bottoms of the upper stainless steel sheet and the lower stainless steel sheet are inwards bent respectively to form side connection edges and inserting teeth; inserting grooves corresponding to the inserting teeth are formed in the bottom shell; the tops of the upper stainless steel sheet and the lower stainless steel sheet are in injection molding connection with the top shell; and the lap joint parts of the side connection edges on the two sides of the upper stainless steel sheet and the lower stainless steel sheet are welded together. The invention provides a cell packaging structure which has high packaging precision and maximized capacity density and low cost; the two or more than two polymer cells are overlapped and connected in parallel and are welded, and then are welded on a protection plate; and a battery shell packaging structure is combined by a plastic shell and a metal shell and the packaging size is saved, so that the battery packaging structure is more compact.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a detachable polymer lithium-ion battery and an assembly method thereof. Background technique [0002] Polymer lithium-ion batteries, due to their higher safety and higher mass energy density, have become more and more popular in the industry and customers. At present, polymer lithium-ion batteries are increasingly being used in a variety of portable mobile devices. For some handheld or portable mobile devices (such as mobile WIFI transmitters), since the ultra-thinness is not required for mobile phones, in order to minimize the size of the device and maximize the battery life of the device, that is, to maximize the battery capacity, the length and width dimensions can be used A battery with a limited thickness and a large size. In order to facilitate the user to replace the battery, this type of battery is often designed as a detachable battery. Due to the large ...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, in the prior art, the packaging structure of this type of battery is that the upper plastic shell 100 and the lower plastic shell 200 are snapped together or ultrasonically welded to form a housing chamber, so that the operation of the package takes up a large space and cannot reach the capacity of the battery. Density maximization

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