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Apparatus and method for continuous stretch forming of aluminium plastic membrane

A technology of stretch forming and aluminum-plastic film, which is applied in the field of lithium-ion batteries, can solve the problems of poor barrier performance of lithium-ion batteries and increase the risk of product quality problems, so as to avoid complex mold making and processing and reduce product quality The risk of problems, the effect of reducing waste

Inactive Publication Date: 2014-03-26
HANGZHOU FUTURE POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium-ion battery shell formed by the above-mentioned continuous stretch forming device and method has poor barrier properties, which increases the risk of product quality problems during the use of lithium-ion batteries.

Method used

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  • Apparatus and method for continuous stretch forming of aluminium plastic membrane
  • Apparatus and method for continuous stretch forming of aluminium plastic membrane
  • Apparatus and method for continuous stretch forming of aluminium plastic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a device for continuous stretching and forming of aluminum-plastic film, including: a cutting device and a stretching die arranged in sequence along the conveying direction of the aluminum-plastic film;

[0035] Wherein, the cutting device is used to form a slit between a section of aluminum-plastic film located in the stretching mold and the next section of aluminum-plastic film to be stretched, and the slit is perpendicular to the conveying path of the aluminum-plastic film. direction, the position of the slit corresponds to the position of the punch of the stretching die, and both ends of the slit do not extend to both sides of the aluminum-plastic film along the conveying direction;

[0036] The stretching mold does not have edge strips, so that when the next segment of the aluminum-plastic film to be stretched is stretched, the aluminum-plastic film at the incision is stretched toward the area where the aluminum-plastic film is stretched fl...

Embodiment 2

[0053] Based on Embodiment 1, this embodiment provides a method for continuous stretching of aluminum-plastic film, such as image 3 As shown, the method includes:

[0054] Step S1: Transfer a piece of aluminum-plastic film 305 between the first template and the second template of the stretching mold 302, so that the aluminum-plastic film completely covers the hollow parts of the first template and the second template ;

[0055] Aluminum-plastic film is generally stored in the form of a reel. Before continuous stretching, it is necessary to place a reel of aluminum-plastic film at a position to be determined, then pull out a section of aluminum-plastic film, and send this section of aluminum-plastic film to the pulling machine. Between the first template and the second template of the stretching mold. Since the forming of the aluminum-plastic film forms a deep pit in the middle area, and the edge area needs to be packaged and cut, it is necessary to cover the hollow part of ...

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Abstract

The invention provides an apparatus and a method both for continuous stretch forming of an aluminium plastic membrane. Two edge-pressing strips on a conventional stretch mold are removed and a cutting device is arranged. A notch is formed at the front edge of the aluminium plastic membrane subjected to stretch forming and in the direction perpendicular to the aluminium plastic membrane conveying direction by utilizing the cutting device. Because the edge-pressing strips, which are used to tightly fixing the aluminium plastic membrane, do not exist during stretch forming, a template cannot fully fix the aluminium plastic membrane, so that the flow and the supplement extension of a material at the front-edge notch of the aluminium plastic membrane are generated, and the aluminium plastic membrane is fully uniformly stretched, thus an shell prepared from an aluminium plastic membrane possesses enough strong barrier property and the risk of generating product quality problems in the usage process of an lithium ion battery is reduced. Also, because the front-edge notch of the aluminium plastic membrane helps to supplement the aluminium plastic membrane, the edge needing cutting of the formed aluminium plastic membrane is reduced, and the waste of the raw material is reduced. Because no edge-pressing strips are arranged on the stretch mold, the problems are avoided that the manufacture and the process of the mold are complex caused by the arranging of the edge-pressing strips.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a device and method for continuous stretching and forming of aluminum-plastic films. Background technique [0002] Lithium-ion batteries have excellent performance and broad application prospects, and are currently the hotspots of research and development in the industry. Lithium-ion batteries are composed of lithium-ion cells, electrolyte, protection circuit (PCM) and casing. After the lithium-ion cells are wound and manufactured, the aluminum-plastic film needs to be stretched through a stretching mold to form a casing, and then Put the lithium-ion battery cells into the shell, and then go through the process of injecting electrolyte, packaging and other processes to complete the production of lithium-ion batteries. [0003] The shell of lithium-ion batteries must have strong barrier properties and be able to resist a series of effects such as swelling, dissoluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/30
Inventor 杨国平郑洪荣孙晓奇
Owner HANGZHOU FUTURE POWER TECH
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