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Outer packaging material for high-punching-depth battery device and battery

A battery device and outer packaging technology, which is applied in the field of aluminum-plastic film production, can solve problems such as cracking, concentrated deformation, and rough surface of aluminum foil, and achieve the effects of reducing size distribution, improving crystal uniformity, and deepening the forming limit depth

Pending Publication Date: 2021-05-28
WUXI ENERGY NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The main problem of the existing A8021 material is that when the Si content is too much, the crystal nucleus will become larger, resulting in coarser crystal grains, and the crystal grain size is not uniform
If the internal particle size is coarse and uneven during drawing, the surface of the aluminum foil will be rough, the stress will be concentrated in some parts of the interior, and the thinner parts will be concentrated and deformed, eventually leading to rupture

Method used

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  • Outer packaging material for high-punching-depth battery device and battery
  • Outer packaging material for high-punching-depth battery device and battery
  • Outer packaging material for high-punching-depth battery device and battery

Examples

Experimental program
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Effect test

Embodiment 1

[0123] Use the aluminum alloy foil described in Table 2 to form a composite film, the lamination method is B-1, the thickness is 40 μm, the Si content is 0.1%, the Sb content is 0.02%, and the plane orientation Cube{001} / Cu{112}=14%. The composition is: base material layer (25 μm) / adhesive layer A (3 μm) / aluminum alloy foil layer / adhesive layer B / heat-sealing layer (40 μm).

[0124] Wherein, the thickness of the aluminum alloy foil layer is 20 μm, 40 μm, or 100 μm.

[0125] The lamination method is as follows. For the substrate layer, biaxially stretched PBT (polybutylene terephthalate) having a thickness of 25 µ was used. The surface of the substrate layer in contact with the adhesive layer A was previously subjected to corona treatment. On the substrate layer, the aluminum alloy foil layer is composited by a dry composite method. Specifically, a two-component polyurethane adhesive (polyol compound and aromatic isocyanate compound) was coated on one surface of the aluminum...

Embodiment 2

[0132] Use the aluminum alloy foil described in Table 2 to form a composite film, the lamination method is B-2, the thickness is 40 μm, the Si content is 0.1%, the Sb content is 0.04%, and the plane orientation Cube{001} / Cu{112}=14%.

[0133] The stacking method is the same as in Example 1.

Embodiment 3

[0135] Use the aluminum alloy foil described in Table 2 to form a composite film, the lamination method is B-1, the thickness is 40 μm, the Si content is 0.08%, the Sb content is 0.02%, and the plane orientation Cube{001} / Cu{112}=10%.

[0136] The stacking method is the same as in Example 1.

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Abstract

The invention relates to an outer packaging material for a high-punching-depth battery device and a battery. The outer packaging material comprises a base material layer, a barrier layer and a hot melting layer; the outer packaging material is characterized in that the barrier layer is an aluminum alloy foil; the distribution of the optimal plane orientation of the aluminum alloy foil is the ratio of Cube {001} < 100 > orientation to Cu {112} < 111 >, i.e., Cube {001} < 100 > / Cu {112} < 111 > = 1.6-20%, and the proportion of S {123} < 643 > orientation in the entire aluminum alloy foil is 15% or more. The material has the positive effects that the proportion of Cube {001} < 100 > / Cu {112} < 111 > is reduced within a certain range, so that the crystal size distribution in the aluminum foil can be reduced, the crystal uniformity is improved, and the forming limit depth is deepened.

Description

technical field [0001] The invention relates to the technical field of aluminum-plastic film production, in particular to an outer packaging material for a high-drawing battery device and a battery. Background technique [0002] At present, lithium-ion batteries are mainly divided into three categories: square, cylindrical, and soft packs. The square and cylindrical shells are mainly made of hard shells such as aluminum alloy and stainless steel. The aluminum alloy shell can be pure aluminum, while the shell of the soft pack is made of aluminum plastic. Manufactured by composite film, which greatly improves the problem of inflexible shape design of hard-packed batteries. [0003] Aluminum-plastic composite film is the decisive material for pouch batteries, and it still maintains high resistance in the environment of liquid chemicals such as strong acids or organic solvents. Because aluminum-plastic film has the advantages of light weight, thin thickness, and high energy den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/32B32B27/34B32B27/36B32B33/00H01M50/105H01M50/129B32B7/022B32B7/025B32B7/12B32B15/04B32B15/085B32B15/18B32B27/06C22C21/02C22C21/00
CPCB32B27/08B32B27/36B32B27/34B32B27/06B32B7/12B32B27/20B32B15/043B32B15/18B32B27/32B32B15/085B32B33/00B32B7/022B32B7/025C22C21/02C22C21/00B32B2255/06B32B2255/26B32B2307/7265B32B2457/10
Inventor 程跃王卉
Owner WUXI ENERGY NEW MATERIALS TECH CO LTD
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