A sealing technology and device for separation film bag

Abstract

The invention discloses the edge enveloping art of a septum bag and the device thereof. The device comprises a gas cylinder (1) and a base (2). A guide rod retaining plate (4), an electric knife (5), an electric knife retaining plate (6), a pressing plate guide rod (7), an electric knife guide rod (8), two pressing plates (9) and a backing plate (10) are arranged between the gas cylinder (1) and the base (2). The lower end of a cylinder pushing rod is connected with the guide rod retaining plate (4). A structure which is as simple as possible is adopted for the invention to achieve that the cutting and the combining of two layers of septum can be finished simultaneously. The edge enveloping width of the septum bag is small, and the stickability of the bag mouth is tight without breach.

Description

technical field [0001] The invention relates to a diaphragm bag edge sealing process and device. Background technique [0002] The positive and negative electrodes of the battery need to be separated by a diaphragm, so that there is no short circuit between the positive and negative electrodes and the ions between the positive and negative electrodes can be transmitted, usually separated by a non-woven fabric (diaphragm). There are several methods, one of which is to put the positive electrode sheet or the positive and negative electrode sheets in a special diaphragm bag, such as lithium-ion batteries, hydrogen batteries, nickel-chromium batteries, etc. all use the aforementioned diaphragm bags. In the battery structure, it is required that the space occupied by the pole piece in the battery case should be as small as possible, so the difference between the width of the diaphragm bag and the width of the pole piece is required to be as small as possible, and the value is 2-3...

AI Technical Summary

Problems solved by technology

When a machine is used for multi-standard pole pieces, the ultrasonic vibrating head must be replaced, which is troublesome; if several sides need to be formed at one time, due to space constraints, the ultrasonic vibrating head is difficult to design

In addition, because the edge of ultrasonic welding needs a certain width, about 0.8-1.5mm, the strength of the seam is not enough if the width is small, and the width of the bag will be wider if the width is large. The width of the sheet is 2mm larger, and it is difficult to guarantee it by ultrasonic method

[0011] The structure of the equipment using ultrasound is complicated, and it is troublesome to change the type

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