KR20140019761A - Secondary battery case and method of producing same - Google Patents

Abstract

Provided is a secondary battery case having a side coating layer formed on a first resin layer, a second resin layer, and an Al layer formed between the first resin layer, the second resin layer and a side coating layer formed on the outer side of the Al layer, the first resin layer, and the second resin layer, the Al layer formed between the first resin layer, the second resin layer. On the other hand, provided is a method of producing a secondary battery case that includes a step of forming a first resin layer or a second resin layer respectively in the upper part and the lower part of the Al layer, and a step of cutting the first resin layer, the Al layer, and the second resin layer by using a heated cutter, a step of forming a side coating layer in the cutting plane of the first resin layer, the Al layer, and the second resin layer by cooling the mixture of the first and the second resin layer molten by the cutter.

Description

Secondary battery case and its manufacturing method {Secondary battery case and method of producing same}

The present invention relates to a secondary battery exterior material and a method for manufacturing the same, and more particularly, to a secondary battery exterior material and a method of manufacturing the improved corrosion resistance and insulation.

Recently, interest in energy storage technology is increasing. As the field of application extends to the energy of mobile phones, camcorders and notebook PCs, and even electric vehicles, efforts for research and development of electrochemical devices are becoming more concrete.

The electrochemical device is the field attracting the most attention in this respect, and among them, the development of a secondary battery capable of charging and discharging has become a focus of attention. In recent years, research and development on the design of new electrodes and batteries have been proceeding in order to improve capacity density and specific energy in developing such batteries.

Among the currently applied secondary batteries, the lithium secondary battery developed in the early 1990s has advantages such as higher operating voltage and higher energy density than conventional batteries such as Ni-MH, Ni-Cd and sulfuric acid-lead batteries using an aqueous electrolyte solution . In addition, as the demand for secondary batteries having excellent portability increases due to the development of portable electronic devices, pouch-type secondary batteries are widely used.

The pouch type secondary battery typically includes an exterior material for protecting the secondary battery. The exterior material generally includes an aluminum layer and an internal and external numerical layer, but the cutting surface cut by the cutter during the molding of the exterior material is exposed to the outside. As a result, there is a high possibility that corrosion of the aluminum layer may occur, and the generated corrosion is continuously diffused to the inside, thereby causing a problem that the life of the secondary battery is shortened or the performance is deteriorated.

In order to prevent this, the taping process may be performed on the cut surface of the aluminum layer. However, the taping process requires a separate additional process and time, thereby lowering the productivity of the secondary battery.

The present invention is to solve the above-mentioned problems, to provide a secondary battery packaging material and a method for manufacturing the packaging material that can prevent the corrosion of the packaging material without the introduction of additional processes.

In order to solve the problem to be solved, an embodiment of the present invention is a first resin layer, a second resin layer, an aluminum layer interposed between the first resin layer and the second resin layer, and the first resin layer It provides a secondary battery packaging material comprising a side coating layer formed on the outer surface of the second resin layer and the aluminum layer.

In addition, another embodiment according to the present invention is to form a first resin layer or a second resin layer on the upper and lower portions of the aluminum layer, respectively, the first resin layer, the aluminum layer, and the second resin layer with a heated cutter Cutting, and cooling the mixture of the first and second resin layers melted by the cutter to form side coating layers on the cut surfaces of the first resin layer, the aluminum layer, and the second resin layer. Provided is a method for manufacturing a secondary battery exterior material.

Furthermore, another embodiment according to the present invention is to prepare a first aluminum layer having a first resin layer and a second resin layer formed on top or bottom, respectively, the third resin layer and the fourth resin layer respectively on the top or bottom Manufacturing a formed second aluminum layer, laminating the first aluminum layer and the second aluminum layer to each other, heating the first to fourth resin layers, the first aluminum layer, and the second aluminum layer. Cutting the first resin layer to the fourth resin layer, the first aluminum layer, and the second aluminum layer by cooling the mixture of the first to fourth resin layers melted by the cutter. It provides a method for manufacturing a secondary battery packaging material comprising the step of forming a side coating layer.

According to the present invention, by using a cutter that is heated enough to melt the resin layer when cutting the outer surface of the secondary battery packaging material, it is possible to form a side coating layer with a mixture of the resin layer melt to coat the outer surface safely. In order to minimize the exposure of the aluminum layer of the secondary battery exterior material, it provides a secondary battery exterior material that does not cause problems such as corrosion. Also, the part where the aluminum layer of the secondary battery exterior material is exposed to the outside without introducing additional processes. Can be sealed.

Therefore, it is possible to improve the life and performance of the secondary battery while preventing corrosion of the secondary battery exterior material and improving the productivity of the secondary battery.

1 and 2 are cross-sectional views showing a secondary battery packaging material according to an embodiment of the present invention.
3 and 4 are flowcharts illustrating a method of manufacturing a secondary battery exterior member according to an embodiment of the present invention.
5A and 5B are cross-sectional views illustrating a laminated structure of a secondary battery exterior member according to an embodiment of the present invention.
6A and 6B are cross-sectional views illustrating a manufacturing process of a secondary battery exterior member according to an embodiment of the present invention.
7 is a perspective view illustrating a pouch type secondary battery including a secondary battery exterior member according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Of course.

1 is a cross-sectional view of a secondary battery packaging material according to an embodiment of the present invention.

Referring to FIG. 1, the secondary battery packaging material 100 according to an embodiment of the present invention may include a first resin layer 110, a second resin layer 120, the first resin layer 110, and a second number. An aluminum layer 130 interposed between the ground layers 120, and the side coating layer 140 formed on the outer surfaces of the first resin layer 110, the second resin layer 120, and the aluminum layer 130. Can be.

Here, the first resin layer 110 may be provided on the outermost side of the secondary battery packaging material 100. For example, the first resin layer 110 is an upper portion of the aluminum layer 130. It may be provided in.

The first resin layer 110 not only prevents moisture in the air from penetrating into the exterior material 100, but also functions to protect the aluminum layer 130 from corrosion. In particular, since the first resin layer 110 must have excellent resistance from the external environment, a polymer resin having a predetermined tensile strength and weather resistance can be used. Specifically, the first resin layer 110 may include one or two or more selected from the group consisting of polyethylene terephthalate (PET), polydbuthylene terephthalate (PBT), and polyethylene naphthalate (PEN), and impact resistance, and In view of tensile strength, polyethylene terephthalate (PET) may be used.

It is preferable that the thickness of the said 1st resin layer 110 is 1 micrometer-20 micrometers. When the thickness of the first resin layer 110 is less than 1 μm, the thickness of the first resin layer 110 is too thin to protect the aluminum layer 113, and the first resin layer 113 during the sealing process. This cutting and the like can be broken, and if it exceeds 20 μm fusion with the electrode lead may be difficult, in particular it may be difficult to uniformly form the side coating layer 140 to be described later.

On the other hand, the second resin layer 120 may be provided inside the secondary battery packaging material 100, for example, the second resin layer 120 is provided below the aluminum layer 130. Can be.

The second resin layer means an inner sealant layer in the secondary battery packaging material, and is made of a material having electrolyte resistance to protect the aluminum layer from the electrolyte in the secondary battery, and also absorbs external impact. The second resin layer 220 may include one or two or more selected from the group consisting of polyetherurethane-based, PP (polypropylene), and PE (polyethylene), and may use PP (polypropylene) in view of electrolyte resistance. Can be.

The thickness of the second resin layer 120 may be appropriately determined in consideration of the volume of the accommodating part of the battery case and the size of the electrode assembly. Preferably it may be 1 ㎛ ~ 1mm. When the thickness of the second resin layer 120 is less than 1 μm, it is difficult to exert a desired shock absorbing effect, and the second resin layer 120 may be broken or broken during the sealing process, and in contrast, exceeds 1 mm. There is a problem that the battery capacity is reduced by forming a relatively thin electrode assembly, in particular, it may be difficult to uniformly form the side coating layer 140 to be described later. The aluminum layer 130 may be interposed between the first resin layer 110 and the second resin layer 120. The aluminum layer 130 may prevent moisture penetration into the secondary battery and may improve moldability and mechanical strength of the exterior material.

The side coating layer 140 is formed along the outer surfaces of the first resin layer, the second resin layer, and the aluminum layer, and may be formed of a mixture of the first resin layer 110 and the second resin layer 120.

As will be described later, the first resin layer 110, the second resin layer 120, and a cutting machine heated to the extent that the first resin layer 110 and the second resin layer 120 can be melted. When cutting the exterior material 100 in which the aluminum layer 130 is stacked, the first resin layer 110 and the second resin layer 120 may be melted due to the temperature of the cutter. Furthermore, the first resin layer 110 and the second resin layer 120 melted by the vertical movement of the cutter are mixed with each other to form a mixture. Since the mixture is cooled to room temperature by a subsequent process, the side coating layer 140 having a predetermined thickness may be formed on the cut surfaces of the first resin layer 110, the second resin layer 120, and the aluminum layer 130.

The thickness of the side coating layer 140 may be determined and controlled by the moving speed and temperature of the heated cutter. Specifically, the slower the moving speed of the cutter and the higher the temperature of the cutter, the greater the amount of heat transferred to the first 110 and the second resin layer 120 will be increased, the side coating layer 140 will be formed thicker will be. The side coating layer 140 may be 20% to 100% of the thickness of the first resin layer 110, preferably 50%.

The cut surface of the aluminum layer 130 is sealed by the side coating layer 140, thereby preventing moisture penetration and aluminum corrosion. Therefore, it is possible to effectively protect the outer surface of the secondary battery packaging material without any additional process.

Referring to FIG. 2, the secondary battery packaging material according to another exemplary embodiment of the present invention may include a third resin layer 230, an aluminum layer 250, and a second resin layer sequentially stacked on the second resin layer 220. 4 may further include a resin layer 240, and the side coating layer 260 may be formed on outer surfaces of the first 210 to fourth resin layers 240 and the aluminum layer 250.

The third resin layer 230 may be positioned at the center side of the secondary battery packaging material 200. For example, the third resin layer 230 may be provided between the layers of the aluminum layer 250. Can be.

The third resin layer 230 together with the second resin layer 210 may form an inner sealant layer of a secondary battery packaging material. That is, the third resin layer 230 is made of a material having electrolyte resistance to protect the aluminum layer from the electrolyte in the secondary battery, and also absorbs external impact. The third resin layer 230 may include one or two or more selected from the group consisting of polyetherurethane-based, PP (polypropylene) and PE (polyethylene), and may use PP (polypropylene) in view of electrolyte resistance. Can be.

The thickness of the third resin layer 230 may be appropriately determined in consideration of the volume of the accommodating part of the battery case and the size of the electrode assembly. Preferably it may be 1 ㎛ ~ 1mm. When the thickness of the third resin layer 230 is less than 1 μm, it is difficult to exert a desired shock absorbing effect, and the third resin layer 230 may break or break during the sealing process. In this case, there is a problem that the battery capacity is relatively reduced, and in particular, it may be difficult to uniformly form the side coating layer 260.

In addition, the second resin layer 220 and the third resin layer 230 may be the same or different, respectively, and the second resin layer 220 and the third resin layer 230 is formed of the same material. The bonding between the second resin layer 220 and the third resin layer 230 may be improved.

The fourth resin layer 240 may be provided on the outermost side of the secondary battery packaging material 200, and may be located at the bottom of the secondary battery packaging material 200, for example.

The fourth resin layer 240 not only prevents moisture in the air from penetrating into the exterior member 200, but also functions to protect the aluminum layer 250 from corrosion. In particular, since the fourth resin layer 240 must have excellent resistance from the external environment, a polymer resin having a predetermined tensile strength and weather resistance can be used. Specifically, the fourth resin layer 240 may include one or two or more selected from the group consisting of polyethylene terephthalate (PET), polydbuthylene terephthalate (PBT), and polyethylene naphthalate (PEN), and impact resistance, and In view of tensile strength, polyethylene terephthalate (PET) may be used.

It is preferable that the thickness of the 4th resin layer 240 is 1 micrometer-20 micrometers. When the thickness of the fourth resin layer 240 is less than 1 μm, the thickness of the fourth resin layer 240 is too thin to protect the aluminum layer 250, and the fourth resin layer 240 during the sealing process. This cutting and the like may be damaged, and when it exceeds 20 μm, fusion with the electrode lead may be difficult, and in particular, it may be difficult to uniformly form the side coating layer 260 described later.

In addition, the first resin layer 210 and the fourth resin layer 240 may be the same or different, respectively.

The side coating layer 260 may be formed of a mixture of the first resin layer 210 and the fourth resin layer 240. The cut surface of the aluminum layer 250 is sealed by the side coating layer 260, thereby preventing moisture infiltration and corrosion of aluminum. Therefore, due to the presence of the side coating layer 260 can effectively protect the outer surface of the secondary battery packaging material 200 without a separate process. Therefore, according to the secondary battery packaging material 200 according to the present exemplary embodiment, the secondary battery packaging material 200 includes a plurality of aluminum layers 250 and is formed of the first resin layer 210 to the fourth resin layer 240. Moisture penetration and impact resistance into the battery can be more effectively improved.

On the other hand, the manufacturing method of the secondary battery packaging material according to an embodiment of the present invention may include the following steps, as shown in FIG.

That is, forming the first resin layer 110 or the second resin layer 120 on the upper and lower portions of the aluminum layer (S100), next, the first resin layer 110, the aluminum layer 130, And cutting the second resin layer 120 with the heated cutter (S110), and finally, the mixture of the first 110 and the second resin layer 120 melted by contacting the cutter is the first. The resin layer 110 may be fused to the cut surfaces of the resin layer 110, the aluminum layer 130, and the second resin layer 130 to form the side coating layer 140 (S120).

Forming the first resin layer 110 or the second resin layer 120 on the upper and lower portions of the aluminum layer 130 (S100) is the first resin layer (top and lower portions of the aluminum layer 130, respectively) 110 or the second resin layer 120 is coated to form a resin layer, it is not limited as long as it can form a resin layer uniformly. For example, a method of uniformly applying the coating liquid in which the resin is molten to the aluminum layer using a spray or the like, or a method of thermally fusion of the sheet-shaped resin layer on the aluminum layer may be considered.

The first resin layer 110 and the second resin layer 120 may use a thermoplastic resin. In particular, the first resin layer 110 may be formed of polyethylene terephthalate (PET), and the second resin layer 120 may be formed of polypropylene (PP).

On the other hand, by cutting the first resin layer 110, the aluminum layer 130, and the second resin layer 120 with a heated cutter (S110), the first 110 and the second resin layer 120. The aluminum layer 130 coated with) is cut by the heated cutter. The heated cutter cuts the first resin layer 110, the second resin layer 120, and the aluminum layer 130 while descending to form a cut surface of the packaging material. At the same time, a part of the first 110 and the second resin layer 120 is melted to have an appropriate viscosity. Subsequently, the molten first and second resin layers 120 may be mixed with each other by the upward movement of the cutter.

At this time, the heating temperature of the heated cutter is suitably 80 ℃ to 300 ℃ the temperature at which the first 110 and the second resin layer 120 is melted by the heated cutter to have a suitable viscosity. When the temperature is 80 ° C. or less, melting of the resin layer may be undesirable, or formation of a uniform side coating layer may be difficult. On the other hand, if the temperature is 300 ℃ or more, the resin layer is carbonized, it is difficult to form a normal side coating layer. However, the heating temperature of the cutter may be set in consideration of material properties of the first 110 and second resin layers 120.

The mixture of the first 110 and the second resin layer 120 melted by contacting the cutter is cut on the cut surfaces of the first resin layer 110, the aluminum layer 130, and the second resin layer 120. Forming the side coating layer 140 by fusion (S130) is a mixture of the first 110 and second resin layer 120 melted and mixed by the vertical movement of the cutter to cool below a predetermined temperature The mixture may be fused to the cut surfaces of the first resin layer 110, the aluminum layer 130, and the second resin layer 120. Here, the predetermined temperature may be room temperature.

A part of the molten first resin layer 110 to the second resin layer 120 is moved downward as the cutter is lowered to form the side coating layer 140 on the cut surface of the laminated aluminum layer 130.

Subsequently, a portion of the first 110 resin layer and the second resin layer 120 melted in accordance with the rise of the heated cutter is moved upward so that the side coating layer 130 has an even shape. When the molten polymer moves up and down the cut surface, the side coating layer 140 is formed, and when the side coating layer 140 is naturally cooled, the outer surface of the aluminum layer 130 is covered.

In addition, in the method of manufacturing a secondary battery exterior member according to another embodiment of the present invention, as shown in FIG. It may include the step (S200) of manufacturing the first aluminum layer 250.

Subsequently, the second resin layer 230 and the fourth resin layer 240 may include manufacturing a second aluminum layer 250 formed at an upper portion or a lower portion (S210). Next, the first aluminum layer 250 and the second aluminum layer 250 may be stacked on each other (S220).

Thereafter, cutting the first resin layer 210 to the fourth resin layer 240, the first aluminum layer 250, and the second aluminum layer 250 with a heated cutter (S230). Finally, the first resin layer 210 to the fourth resin layer 240, the first aluminum in a mixture of the first 210 to the fourth resin layer 240 melted in contact with the cutter. The step 250 may include forming the side coating layer 260 on the cut surface of the layer 250 and the second aluminum layer 250.

The manufacturing of the first aluminum layer 250 having the first resin layer 210 and the second resin layer 220 formed on or under the upper portion S200 may be performed on the upper and lower portions of the first aluminum layer 250, respectively. The first resin layer 210 or the second resin layer 220 is coated to form a resin layer. In this case, the first resin layer 210 and the second resin layer 220 generally use a thermoplastic resin. In particular, the first resin layer 210 may be formed of polyethylene terephthalate (PET), and the second resin layer 220 may be formed of polypropylene (PP).

The manufacturing of the second aluminum layer 250 in which the third resin layer 230 and the fourth resin layer 240 are formed at the upper portion or the lower portion (S210) may be performed at the upper and lower portions of the second aluminum layer 250, respectively. The third resin layer 230 or the fourth resin layer 240 is coated to form a resin layer. In this case, the third resin layer 230 and the fourth resin layer 240 generally use a thermoplastic resin. In particular, the fourth resin layer 240 may be formed of polyethylene terephthalate (PET), and the third resin layer 230 may be formed of polypropylene (PP).

The stacking of the first aluminum layer and the second aluminum layer (S220) may include the first resin layer 310, the first aluminum layer 350, the second resin layer 320, and the first aluminum layer as illustrated in FIG. 5A. The third resin layer 330, the second aluminum layer 350, and the fourth resin layer 340 are stacked, and the second resin layer 320 and the third resin layer 330 are in contact with each other. In this case, the first and second aluminum layers 350 having the resin layer are bonded by heating or pressing the contact surfaces with each other or by using an adhesive.

In this case, the second resin layer 320 and the third resin layer 330 may be the same or different, respectively, the second resin layer 320 from the viewpoint that the bonding between the aluminum layer 350 can be increased. It is preferable that the 3rd resin layer 330 contains the same material.

In addition, as shown in FIG. 5B, in order to increase the bonding between the first and second aluminum layers 350, the materials of the second resin layer 320 and the third resin layer 330 include the same PP. It is desirable to form a single layer 360 to contact and bond with each other.

6A and 6B, the manufacturing method according to an embodiment of the present invention may include the following steps.

The first resin layer 210 to the fourth resin layer 240, the first aluminum layer 250, and a mixture of the first 210 to fourth resin layers 240 melted in contact with the cutter; and Forming a side coating layer 260 on the cut surface of the second aluminum layer 250 (S230) and the step of fusion of the polymer part of the film layer in contact with the cutter 6 to the cut surface of the aluminum layer 250 (S240).

As shown in FIG. 6A, the heated cutter 6 cuts the cut surfaces of the exterior member by cutting the first 410 to the fourth resin layers 440 and the first and second aluminum layers 450 stacked while being lowered. Form.

At this time, the heating temperature of the heated cutter 6 is suitable for the temperature 80 ℃ to 300 ℃ that is melted and has a suitable viscosity in consideration of the material properties of PET or PP material of the film layer. If the temperature is 80 ° C. or less, melting of the resin layer is undesirably difficult to form a side coating layer. If the temperature is 300 ° C. or more, the resin layer is carbonized, making it difficult to form a normal side coating layer. However, when the material of the film layer is different, it is possible to select a suitable heating temperature accordingly.

The cutter 6 cuts the laminated aluminum layer 450 while descending, and simultaneously melts a portion of the first resin layer 410 to the fourth resin layer 440 to be fused to the cut surface.

The first resin layer 410 to the fourth resin layer 440, the first aluminum layer 450, a mixture of the first 410 to the fourth resin layer 440 melted in contact with the cutter And forming the side coating layer 460 on the cut surface of the second aluminum layer 450 (S240) is a part of the molten first resin layer 410 to the fourth resin layer 440 is the cutter 6 Moving downward as the side of the to form a side coating layer 460 on the cut surface of the laminated aluminum layer 450.

As shown in FIG. 6B, a portion of the first resin layer 410 to the fourth resin layer 440 melted in accordance with the rising of the cutter 6 heated is moved upward, so that the side coating layer 460 is even. Shape it.

As such, when the molten polymer moves up and down the cut surface, the side coating layer 460 is formed, and when the side coating layer 460 is naturally cooled, the outer surface of the aluminum layer 450 is covered.

The cut surface portion of the exterior material of the secondary battery according to another embodiment of the present invention manufactured through the above process is shown in FIG. 2.

The cut surface of the exterior member 200 is a side coating layer 260 formed by melting a portion of the first resin layer 210 to the fourth resin layer 240 is formed, the side coating layer 260 is the aluminum layer 250 To prevent the cutting surface of) from being exposed to the outside.

Hereinafter, the present invention will be described in more detail with reference to preferred examples, but the present invention is not limited thereto.

7 is a schematic diagram of a pouch of a secondary battery using the secondary battery packaging material formed by the embodiment of the present invention.

As shown in FIG. 7, the secondary battery 1 according to an exemplary embodiment of the present invention may accommodate an electrode assembly 1, an upper exterior member 10 that may cover an upper portion of the electrode assembly, and the electrode assembly. The lower sheath 20 may be included. The upper exterior member 10 and the lower exterior member 20 are exterior materials of a secondary battery according to an embodiment of the present invention, and are exterior materials of a secondary battery having side coating layers shown in FIG. 1 or 2.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

1: secondary battery
6: cutting machine
10: upper facer
20: lower facer
100, 200: secondary battery exterior material
110, 210, 310, 410: first resin layer
120, 220, 320, 420: second resin layer
130, 250, 350, 450: aluminum layer
230, 330, 430: third resin layer
240, 340, 440: fourth resin layer
140, 260, 460: side coating layer

Claims (20)

A first resin layer and a second resin layer,
An aluminum layer interposed between the first resin layer and the second resin layer, and
Secondary battery packaging material comprising a side coating layer formed on the outer surface of the first resin layer, the second resin layer and the aluminum layer. The method according to claim 1,
The side coating layer is a secondary battery packaging material is a mixture of the first resin layer and the second resin layer. The method according to claim 2,
The mixture is a secondary battery packaging material is a melt of the first resin layer and the second resin layer. The method according to claim 1,
The thickness of the side coating layer is a secondary battery packaging material 20% ~ 100% of the thickness of the first resin layer. The method according to claim 1,
The first resin layer includes one or two or more selected from the group consisting of polyethylene terephthalate (PET), polybuthylene terephthalate (PBT), and polyethylene naphthalate (PEN), and the second resin layer is polyetherurethane-based, PP ( A secondary battery packaging material comprising one or two or more selected from the group consisting of polypropylene) and PE (polyethylene). The method according to claim 5,
The first resin layer is a secondary battery packaging material containing polyethylene terephthalate (PET). The method according to claim 5,
The second resin layer is a secondary battery packaging material containing a polypropylene (PP). The method according to claim 1,
Further comprising a third resin layer, an aluminum layer, and a fourth resin layer sequentially laminated on the second resin layer,
The side coating layer is a secondary battery packaging material formed on the outer surface of the first to fourth resin layer and the aluminum layer. The method according to claim 8,
The side coating layer is a secondary battery packaging material is a mixture of the first resin layer to the fourth resin layer. The method of claim 9,
The mixture is a secondary battery packaging material is a melt of the first resin layer to the fourth resin layer. The method according to claim 8,
The third resin layer includes one or two or more selected from the group consisting of polyetherurethane, polypropylene (PP), and polyethylene (PE), and the fourth resin layer is polyethylene terephthalate (PET) and polybuthylene terephthalate (PBT). And secondary battery packaging material comprising one or two or more selected from the group consisting of polyethylene naphthalate (PEN). The method of claim 11,
The third resin layer is a secondary battery packaging material containing a polypropylene (PP). The method of claim 11,
The fourth resin layer is a secondary battery packaging material containing polyethylene terephthalate (PET). Forming a first resin layer or a second resin layer on the upper and lower portions of the aluminum layer,
Cutting the first resin layer, the aluminum layer, and the second resin layer with a heated cutter, and the first resin layer, the aluminum layer, and a mixture of the first and second resin layers melted by the cutter. Forming a side coating layer on the cut surface of the second resin layer,
Method for manufacturing a secondary battery exterior material comprising a. The method according to claim 14,
The first resin layer comprises a polyethylene terephthalate (PET), the second resin layer is a manufacturing method of the secondary battery packaging material containing a polypropylene (PP). The method according to claim 14,
The mixture of the first and second resin layer is a manufacturing method of the secondary battery packaging material is formed by the vertical movement of the cutter. Manufacturing a first aluminum layer having a first resin layer and a second resin layer formed on or under the top thereof, respectively,
Manufacturing a second aluminum layer having a third resin layer and a fourth resin layer formed on or under the top thereof, respectively,
Stacking the first aluminum layer and the second aluminum layer on each other;
Cutting the first to fourth resin layers, the first aluminum layer, and the second aluminum layer with a heated cutter; and
Forming a side coating layer on the cut surfaces of the first to fourth resin layers, the first aluminum layer, and the second aluminum layer with a mixture of the first to fourth resin layers melted by the cutter;
Method for manufacturing a secondary battery exterior material comprising a. 18. The method of claim 17,
Laminating | stacking of the said 1st aluminum layer and the said 2nd aluminum layer is a manufacturing method of the secondary battery exterior material formed by making the said 2nd resin layer and the said 3rd resin layer contact each other. 18. The method of claim 17,
The first resin layer and the fourth resin layer comprises a polyethylene terephthalate (PET), the second resin layer and the third resin layer is a resin layer comprises a PP (polypropylene) manufacturing method of the packaging material of a secondary battery. The method of claim 14 or 17, wherein the heating temperature of the cutter is 80 ℃ to 300 ℃ characterized in that the secondary battery packaging material manufacturing method.

Images