Soft package power cell top seal head structure

Abstract

The invention provides a soft package power cell top seal head structure, and belongs to the field of power pools. The soft package power cell top seal head structure comprises an upper seal head and a lower seal head; the upper seal head and the lower seal head are correspondingly arranged along a vertical direction to form a closed heat seal space; after the upper seal head and the lower seal head are pressed, an aluminum plastic film wrapping a soft package lithium ion battery is subjected to heat seal; the upper seal head and the lower seal head are provided with two slot position marks at tab sealing positions, wherein one slot position mark at the edge of a sealant is an outer slot position mark, and the other slot position mark at the junction of a tab and the sealant is an inner slot position mark; the upper seal head and the lower seal head inwards incline at the outer slot position mark to form a first slope, so that tab glue fills the outer slot position mark are filled, and the liquid leakage of the tab is prevented; and the upper seal head and the lower seal head incline inwards at the inner slot position mark to form a second slope, so that tab glue fills the inner slot position mark, and the liquid leakage of the tab is prevented. According to the soft package power cell top seal head structure of the invention, a slope type mechanism is used to optimize a step type structure, and the difficulty of glue filling at the step is solved, so that the packaging effect of the aluminum-plastic film is improved.

Description

Technical field[0001]The present invention belongs to the field of power cells, and a lithium-ion battery involving a new energy vehicle, and more particularly to a soft package power electrical core top sealing head structure.Background technique[0002]Soft package lithium ion battery aluminum mold is mainly composed of nylon, aluminum layer, PP layer, in a soft package battery package station, by a certain temperature, pressure, time element, with a copper head to complete two-layer aluminum mold PP layer melting Adhesion to ensure the airtightness of the soft packaging polymer battery package. On both sides of the header, the control of the package thickness is performed, and the aluminum-plastic shell of different thicknesses matches different limit platform heights; the upper and lower heads are passive, and the head is limited to the limit station. Reverse force; during repeated package, the upper and lower heads are gradually deformed, and the cumulative thickness is constantl...

AI Technical Summary

Problems solved by technology

[0003] The shape of the current top seal head is a right-angle double-step or right-angle single-step lug groove. There are two problems in the following aspects. 1. The shape of the ear groove of the current top seal head is a double-step shape. After use, the steps are easy to wear, and the sealing effect will become worse after severe wear

It will eventually lead to battery leakage and other phenomena; 2. The shape of the lug groove of the current top sealing head is a double-step shape. As the battery lugs become thicker, it becomes more and more difficult to fill the steps with PP glue. If the filling effect of PP glue is not good, it will cause leakage

The longer the head is used, the greater the risk, which will eventually lead to battery leakage and other phenomena

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