Packaging structure of soft-package battery

Abstract

The invention discloses a packaging structure of a super-thin soft-package battery, comprising a battery cell, a PTC and a protective board; the PTC is directly fixed on the protective board, a contact sheet is fixedly arranged on the PTC, and the other end of the contact sheet is fixedly arranged on one lug of the battery cell, and insulation paper is fixedly arranged at the lug position of the battery. The packaging structure solves the problem that the thickness is heavy by adopting L-shaped rotary connection and leads the thickness of the battery to be thinnest; the insulation measure in the invention is simple, thereby not only improving the production efficiency of lines, but also eliminating the hidden trouble caused by the quality of the insulation paper; in addition, partial insulation gummed paper is cancelled and the cost is reduced; besides small packed PTC and the contact sheet, the product cost is reduced.

Description

technical field [0001] The invention discloses a soft pack battery, in particular to a package structure of an ultra-thin soft pack battery. Background technique [0002] As consumer electronic products are more and more widely used in people's lives, many consumer electronic products are powered by lithium batteries. Some electronic products set lithium batteries inside the product for convenience and beauty, usually for To save cost, the lithium battery set inside the electronic product adopts a soft pack battery. Please see attached figure 1 And attached figure 2 , in the field of pouch batteries in the prior art, when the battery is protected by PTC (positive temperature coefficient thermistor) 4, PTC 4 is directly connected to the tab 5 of battery cell 1, and then an "L"-shaped bumper is used to protect the battery. The sheet 3 connects the PTC4 to the battery protection board 2 (ie, the PCB board). Because when the PTC4 is connected with the protection board 2, th...

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Problems solved by technology

Because when the PTC4 is connected with the protection board 2, the L-shaped touch piece 3 is used for switching, so it is necessary to insulate the L-shaped touch piece 3, that is, it is necessary to add a pad between the touch piece 3 and the cell 1 Multi-layer insulating paper, the thickness of the multi-layer insulating paper plus the thickness of the L-shaped touch plate 3, plus the thickness of the PTC4, so that the finished product will definitely exceed the thickness of the cell 1 itself, in some ultra-thin digital products Among them, due to the limitation of the size of the digital product itself, there is generally no space to satisfy the thickness of the battery, or it can be said that due to the thickness of the battery, the further ultra-thinning of electronic products is limited.

Moreover, a large number of manual operations are required when adding insulating paper, which increases the product cost and low production efficiency

In order to solve the above problems, the batteries in ultra-thin digital products mostly use spot-welded PTCs in small packages, or patch PTCs. Although they can also play a certain protective role, the cost is increased compared with conventional PTCs, and the effect is also low. Not as ideal as a conventional spot welding bar PTC

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