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Battery cell flexible packaging film

A flexible packaging film and battery core technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve problems such as cracking, avoid punching cracks, improve use safety, and improve packaging authenticity.

Active Publication Date: 2020-06-26
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aluminum-plastic film generally has three layers, nylon layer, metal aluminum foil layer and polypropylene layer. In order to improve the corrosion resistance of the metal aluminum foil, it is necessary to set a corrosion-resistant layer on the surface of the metal aluminum foil to improve the corrosion resistance of the metal aluminum foil layer. The existing The corrosion-resistant layer is generally an alumina layer with a relatively brittle texture, and cracking will occur when the battery is stamped during the packaging process, resulting in an increase in the defective rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A flexible packaging film for battery cores, comprising a nylon layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, a protective layer, a third adhesive layer, and a heat-sealing layer stacked in sequence, on the surface of the aluminum foil layer There is a corrosion-resistant layer, the protective layer is a composite protective layer, the composite protective layer includes an EVA adhesive film layer and a TPX film layer, and a non-woven fabric layer is arranged between the EVA adhesive film layer and the TPX film layer. There are several protrusions on the cloth layer. The contact surface between the aluminum foil layer and the first bonding layer is provided with a water vapor resistant layer. The contact surface between the aluminum foil layer and the second bonding layer is provided with an acid corrosion resistant layer. The water vapor resistant layer is passivated. The passivation treatment solution is a chromium-free passivation trea...

Embodiment 2

[0031] A flexible packaging film for battery cores, comprising a nylon layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, a protective layer, a third adhesive layer, and a heat-sealing layer stacked in sequence, on the surface of the aluminum foil layer There is a corrosion-resistant layer. The protective layer is a composite protective layer. The composite protective layer includes an EVA adhesive film layer and a TPX film layer. A non-woven fabric layer is arranged between the EVA adhesive film layer and the TPX film layer. There are several protrusions on the cloth layer. The contact surface between the aluminum foil layer and the first bonding layer is provided with a water vapor resistant layer. The contact surface between the aluminum foil layer and the second bonding layer is provided with an acid corrosion resistant layer. The water vapor resistant layer is passivated. The passivation treatment solution is a chromium-free passivation treatmen...

Embodiment 3

[0033] A flexible packaging film for battery cores, comprising a nylon layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, a protective layer, a third adhesive layer, and a heat-sealing layer stacked in sequence, on the surface of the aluminum foil layer There is a corrosion-resistant layer, the protective layer is a composite protective layer, the composite protective layer includes an EVA adhesive film layer and a TPX film layer, and a non-woven fabric layer is arranged between the EVA adhesive film layer and the TPX film layer. There are several protrusions on the cloth layer. The contact surface between the aluminum foil layer and the first bonding layer is provided with a water vapor resistant layer. The contact surface between the aluminum foil layer and the second bonding layer is provided with an acid corrosion resistant layer. The water vapor resistant layer is passivated. The passivation treatment solution is a chromium-free passivation trea...

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Abstract

The invention relates to the technical field of battery packaging films, particularly to a battery cell flexible packaging film, which comprises a nylon layer, a first bonding layer, an aluminum foillayer, a second bonding layer, a protective layer, a third bonding layer and a heat sealing layer that are sequentially arranged in a stacked mode. A corrosion-resistant layer is arranged on the surface of the aluminum foil layer, the protective layer is a composite protective layer, the composite protective layer comprises an EVA adhesive film layer and a TPX film layer, and a non-woven fabric layer is arranged between the EVA adhesive film layer and the TPX film layer. By arranging the protective layer, the corrosion-resistant layer on the surface of the aluminum foil layer can be powerfullyprotected, and the corrosion-resistant layer of the packaging film is prevented from being cracked and damaged after being stamped in the battery packaging process, so that the packaging effect and the qualified packaging rate of the packaging film are improved, the service life of the packaging film is prolonged, and the use safety of the battery is improved. The protective layer adopts the EVAadhesive film layer and the TPX film layer, so that the service life of the packaging film can be further prolonged, and the protection performance of the battery is improved.

Description

Technical field [0001] The invention relates to the technical field of battery packaging films, in particular to a battery core flexible packaging film. Background technique [0002] The packaging material and structure of the soft-pack battery give it a series of advantages. For example, the safety performance is good. The soft-pack battery is packaged with aluminum-plastic film in the structure. When a safety problem occurs, the soft-pack battery will generally burst and crack. It explodes like a steel shell or aluminum shell battery; light weight, the weight of the soft pack battery is 40% lighter than the steel shell lithium battery of the same capacity, and 20% lighter than the aluminum shell lithium battery; the internal resistance is small, the internal resistance of the soft pack battery Smaller than lithium batteries, it can greatly reduce the battery's self-consumption; good cycle performance, longer cycle life of soft pack batteries, 100 cycles attenuation less than 4%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B32B27/02B32B15/20B32B15/14B32B27/30B32B15/082B32B27/12B32B5/02B32B27/28B32B27/08B32B27/32B32B7/12B32B3/08H01M2/02B65D65/40
CPCB32B5/02B32B5/022B32B7/12B32B15/20B32B15/14B32B27/306B32B27/12B32B15/082B32B27/28B32B27/08B32B27/32B32B3/08B65D65/40B32B2262/0261B32B2307/306B32B2307/558B32B2307/714B32B2553/00H01M50/124Y02E60/10
Inventor 吕松
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL