Anti-adhesion soft package battery process protective film

Abstract

The utility model discloses an anti-adhesion soft package battery process protective film, which relates to the technical field of process protective films and comprises an adhesion layer, a first metal film layer, a deformation support layer, a second metal film layer and a protective layer. A plurality of microparticle bulges are formed on the outer side of the protective layer; the deformation supporting layer comprises a soft material filling layer and a plurality of memory alloy wires which are distributed in the soft material filling layer and extend in the thickness direction of the soft material filling layer, and the two ends of each memory alloy wire abut against the first metal film layer and the second metal film layer. By means of the design, the microparticle protrusions can support gaps between the manufacturing process protective films, and the adhesive force between the manufacturing process protective films during vacuumizing or pressing is reduced; the two ends of the memory alloy wire abut against the first metal thin film layer and the second metal thin film layer, the memory alloy wire is bent when the manufacturing process protective film is pressed and can restore the original shape after being heated, and therefore the overall structure of the manufacturing process protective film is supported, and film adhesion caused by deformation of the manufacturing process protective film during hot pressing is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of process protection film, especially relates to a kind of anti-adhesion soft package battery process protection film. BACKGROUND

[0002] In the manufacturing process of soft package battery, it is usually necessary to coat a layer of process protection film on the battery monomer, to prevent the physical damage of battery in the process. Battery monomer usually needs to go through high-temperature baking, vacuumizing and hot pressing and other processes. Due to the high temperature, pressure and other environmental factors in these processes, the protection film between the batteries may be adhered due to temperature rise or excessive pressing force. And in the process of high temperature and hot pressing, the protection film is prone to deformation, especially the relative position change between film layers may also cause the adhesion between film layers. Therefore, how to design a kind of anti-adhesion soft package battery protection film not easy to adhere has become an urgent problem to be solved in the current technology. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a kind of anti-adhesion soft package battery process protection film, and the specific technical scheme is:

[0004] A kind of anti-adhesion soft package battery process protection film, from bottom to top includes adhesion layer, first metal film layer, deformation support layer, second metal film layer and protection layer in sequence;

[0005] The adhesion layer is used to adhere to the surface of battery;

[0006] The protection layer outside is formed with a plurality of micro-particle protrusions;

[0007] The deformation support layer includes soft material filling layer and a plurality of memory alloy wires distributed in the soft material filling layer and extending in the thickness direction thereof, and the both ends of the memory alloy wire abut against the first metal film layer and the second metal film layer respectively.

[0008] Preferably, the mass of the memory alloy wire is 10% to 30% of the mass of the soft material filling layer, and the diameter of the memory alloy wire is 0.1 to 0.3 mm.

[0009] Preferably, the protection layer includes a matrix layer and micro-particles distributed on the matrix layer.

[0010] Preferably, the matrix layer is made of polyurethane material, and the micro-particles are silicon particles.

[0011] Preferably, the first metal film layer and the second metal film layer are aluminum foil.

[0012] Preferably, the soft material filling layer is made of silica gel material.

[0013] Preferably, the adhesive layer is a polyester coating.

[0014] Preferably, the memory alloy wire is a nickel-titanium alloy.

[0015] The anti-adhesion soft package battery process protection film provided by the utility model, through the lamination setting of the adhesive layer, the first metal film layer, the deformation support layer, the second metal film layer and the protection layer, and the setting of a plurality of micro-particle protrusions outside the protection layer, when the films of adjacent batteries are tightly attached, the micro-particle protrusions can support the gap between the process protection films, and the adhesion force between the process protection films when being vacuumized or under pressure is reduced; the deformation support layer is designed as the structure of dispersing a plurality of memory alloy wires in the soft material filling layer, the two ends of the memory alloy wire respectively abut against the first metal film layer and the second metal film layer, so that the memory alloy wire bends when the process protection film is under pressure, and restores the original state after being heated, thereby supporting the overall structure of the process protection film, and avoiding the adhesion of the film due to the deformation of the process protection film when being hot-pressed. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0017] Figure 1 The sectional side view of the anti-adhesion soft package battery process protection film provided by the embodiment of the utility model.

[0018] REFERENCE NUMERALS

[0019] 1-adhesive layer;2-first metal film layer;3-deformation support layer;31-soft material filling layer;32-memory alloy wire;4-second metal film layer;5-protection layer;51-matrix layer;52-micro-particle. DETAILED DESCRIPTION

[0020] In order to make those skilled in the art better understand the technical scheme of the utility model, the following will describe the utility model in detail in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limit on the protection scope of the utility model.

[0021] It should be noted that: similar numerals represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0022] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the utility model is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Please refer to Figure 1 The embodiment provides a kind of anti-adhesion soft package battery process protection film, from bottom to top include adhesive layer 1, first metal film layer 2, deformation support layer 3, second metal film layer 4 and protection layer 5 in sequence.

[0026] Adhesive layer 1 is used to adhere to the surface of battery.

[0027]

[0027] Protection layer 5 outer side is formed with multiple micro-particle protrusions.

[0028] Deformation support layer 3 includes soft material filling layer 31 and multiple memory alloy wires 32 distributed in soft material filling layer 31 and extending in the thickness direction thereof, and the two ends of memory alloy wire 32 respectively abut first metal film layer 2 and second metal film layer 4.

[0029] The plurality of micro-particle protrusions formed outside the protective layer 5 can support the gap between the process protection films when the batteries are in close contact, thereby reducing the adsorption force between the films, avoiding mutual adhesion of the process protection films. The hardness of the soft material filling layer 31 is less than that of the adhesive layer 1 and the protective layer 5. When the battery is pressed, the soft material filling layer 31 in the process protection film deforms first, causing the memory alloy wire 32 to bend. After the process protection film is heated, the memory alloy wire 32 returns to its original state, thereby supporting the first metal film layer 2 and the second metal film layer 4 on both sides, and further supporting the entire process protection film, avoiding film adhesion caused by deformation of the process protection film.

[0030] In the production process of the process protection film, the layered preparation and then hot pressing can be used. When preparing the deformation support layer 3, the silica gel precursor solution is first placed in a container, and then the memory alloy wire 32 of the required length is poured into the container. After stirring and dispersing, the container is placed in an electrostatic field, and an ultrasonic device is used to vibrate the silica gel solution precursor solution. The memory alloy wire 32 can continuously move under the action of the electrostatic field, and finally be in a vertical state. After the solution solidifies, the deformation support layer 3 can be obtained.

[0031] The anti-adhesion soft package battery process protection film provided by the embodiment is obtained by stacking the adhesive layer 1, the first metal film layer 2, the deformation support layer 3, the second metal film layer 4, and the protective layer 5, and arranging a plurality of micro-particle protrusions outside the protective layer 5. When the films of adjacent batteries are in close contact, the micro-particle protrusions can support the gap between the process protection films, reducing the adhesion force between the process protection films when vacuumizing or under pressure. The deformation support layer 3 is designed as a structure in which a plurality of memory alloy wires 32 are dispersed in a soft material filling layer 31. The two ends of the memory alloy wire 32 abut against the first metal film layer 2 and the second metal film layer 4, respectively. When the process protection film is pressed, the memory alloy wire 32 bends, and returns to its original state after being heated, thereby supporting the overall structure of the process protection film and avoiding film adhesion caused by deformation of the process protection film during hot pressing.

[0032] Further, the mass of the memory alloy wire 32 is 10% to 30% of the mass of the soft material filling layer 31, and the diameter of the memory alloy wire 32 is 0.1 to 0.3 mm, thereby playing a good process role. Preferably, the mass of the memory alloy wire 32 is 15% to 20% of the mass of the soft material filling layer 31, and the diameter of the memory alloy wire 32 is 0.2 to 0.3 mm.

[0033] Further, the protective layer 5 includes a matrix layer 51 and micro-particles 52 distributed on the matrix layer 51. The micro-particles 52 partially protrude outside the matrix layer 51, thereby forming micro-protrusions on the surface of the matrix layer 51. The micro-protrusions are the micro-particle protrusions formed outside the protective layer 5.

[0034] Further, the substrate layer 51 is made of polyurethane material, which has good heat resistance and mechanical properties, and the micro-particles 52 are silicon particles, thereby increasing the surface friction of the process protection film.

[0035] Further, the first metal film layer 2 and the second metal film layer 4 are aluminum foils.

[0036] Further, the soft material filling layer 31 is made of silica gel material, which can maintain stable physical properties at high temperatures and has good softness.

[0037] Further, the adhesive layer 1 is a polyester coating.

[0038] Further, the memory alloy wire 32 is made of nickel-titanium alloy.

[0039] Principle description:

[0040] The plurality of micro-particle protrusions formed on the outer side of the protective layer 5 can support the gap between the process protection films when the battery is tightly attached, thereby reducing the adsorption force between the films and avoiding mutual adhesion of the process protection films. The hardness of the soft material filling layer 31 is less than that of the adhesive layer 1 and the protective layer 5. When the battery is pressed, the soft material filling layer 31 in the process protection film deforms first, so that the memory alloy wire 32 bends. After the process protection film is heated, the memory alloy wire 32 returns to its original state, thereby supporting the first metal film layer 2 and the second metal film layer 4 on both sides, and further supporting the entire process protection film, thereby avoiding film adhesion caused by deformation of the process protection film.

[0041] It should be noted that in this paper, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0042] The principle and implementation mode of the present application are described by using specific examples in this paper. The above example is only used to help understand the method and its core idea. The above is only a preferred embodiment of the present application. It should be pointed out that due to the limited nature of the language expression, there are objectively infinite specific structures. For ordinary skilled persons in the technical field, without departing from the principle of the present application, some improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate way. These improvements, refinements, changes or combinations, or the application of the concept and technical solution of the present application to other fields without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A protective film for the manufacturing process of a soft-pack battery that prevents adhesion, characterized in that, From bottom to top, it includes an adhesion layer (1), a first metal film layer (2), a deformation support layer (3), a second metal film layer (4), and a protective layer (5). The adhesive layer (1) is used to adhere to the battery surface; Multiple microparticle protrusions are formed on the outer side of the protective layer (5); The deformable support layer (3) includes a soft material filling layer (31) and multiple memory alloy wires (32) distributed in the soft material filling layer (31) and extending along its thickness direction. The two ends of the memory alloy wires (32) respectively abut against the first metal thin film layer (2) and the second metal thin film layer (4).

2. The anti-adhesion protective film for soft-pack batteries according to claim 1, characterized in that, The diameter of the shape memory alloy wire (32) is 0.1~0.3mm.

3. The anti-adhesion protective film for soft-pack batteries according to claim 1, characterized in that, The protective layer (5) includes a matrix layer (51) and microparticles (52) distributed on the matrix layer (51).

4. The anti-adhesion protective film for soft-pack batteries according to claim 3, characterized in that, The matrix layer (51) is made of polyurethane, and the microparticles (52) are silicon microparticles.

5. The anti-adhesion protective film for soft-pack batteries according to claim 1, characterized in that, The first metal film layer (2) and the second metal film layer (4) are aluminum foil.

6. The anti-adhesion protective film for soft-pack batteries according to claim 1, characterized in that, The soft material filling layer (31) is made of silicone.

7. The anti-adhesion protective film for soft-pack batteries according to claim 1, characterized in that, The adhesive layer (1) is a polyester coating.

8. The anti-adhesion protective film for soft-pack batteries according to claim 1, characterized in that, The shape memory alloy wire (32) is a nickel-titanium alloy.

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