1]This application claims the benefit of priority based on the date of 17 Korea Patent Application No. 2017-0134313 years 10 January 2017, and all information disclosed in the literature of the Korea patent application are included as part of the specification.
[2]The present invention for a battery case and a battery cell that contains it, including a variety of metal barrier layer, in particular comprising an outer covering layer, a metal blocking layer and an inner sealant layer and the metal blocking layer is excellent in formability first a pouch-shaped battery case including a second metal having a metal and a high rigidity.
BACKGROUND
[3]
There are many cells that can meet a variety of needs and developed in accordance with the demand for mobile devices increases. High and the demand for prismatic secondary batteries or pouch type secondary battery which can be applied to products such as a thin mobile phone in the form of surface, the material surface in a lithium-ion battery with the advantages such as high energy density, discharge voltage, output stability high demand for lithium secondary batteries such as a lithium ion polymer battery.
[4]
In addition, like the pouch-shaped battery of a structure built in the stacking or stacking / folding type electrode assembly in a pouch-shaped battery case made of aluminum laminate sheet, and low manufacturing cost, small weight, easy deformation reasons, it collects a lot of attention and also the amount of its use is increasing gradually.
[5]
Generally, the pouch-shaped battery is a pouch-shaped case the inside of a laminate sheet consisting of as including a resin layer and a metal layer refers to a cell which is sealed the electrode assembly and electrolyte. An electrode assembly accommodated in the battery case has a jelly-roll type consists of (wound type) electrode assembly or a stacked (multi-layer) structure of the electrode assembly.
[6]
The pouch type battery case is using a storage area and be ductile and malleable with high aluminum foil with a bar, the barrier layer is required having high moldability to depth can be large (foil) in order to increase capacity of the battery.
[7]
However, when using an aluminum foil has been bent portion when bending sealing parts of the battery case easily breaking a problem arises in that the sealing reliability decreases.
[8]
Thus, Korea Patent Laid-Open Publication No. 2013-0005886 hoeun inner coating layer, made of aluminum the first barrier layer, a second layer made of a first polymer, having a thickness of not more than 50% of the first barrier layer, an aluminum alloy and a barrier layer second polymer layer even if the bar, the first barrier layer is damaged, which discloses a secondary battery case and a second barrier layer, but this can block the inflow of outside water, there is a limit, the mechanical strength is improved.
[9]
Japanese Laid-Open Patent Publication No. 2006-117990 discloses a nickel layer on a surface of a stainless steel sheet is coated with the other surface has a start forming a battery case by processing the aluminum layer is a stainless steel sheet of a coated structure, the battery case is a prismatic battery cell case at the point it does not discloses a technology for improving the rigidity of the pouch type battery case.
[10]
Therefore, in the secondary battery using a pouch-shaped battery case, being able to improve the formability of the battery case to manufacture a battery of high capacity, a situation there is a need for to improve the strength of the battery case Technical high.
Detailed Description of the Invention
SUMMARY
[11]
The present invention is the outer coating layer, moisture barrier properties and the metal blocking layer to provide a heat-conductive and heat-sealable for in order to solve the technical problem, which has been requested from the prior art problems, and, to protect the battery cell from the outside, such as the inner sealant layer of a polymer resin having a formed of a sequentially stacked structure of the metal barrier layer in the case of the pouch-shaped battery case including a second metal having an excellent moldability first metal and a high stiffness, the first metal by improved moldability of the battery case the electrodes may be possible to deep molding of the housing to accommodate the battery of high capacity assembly, the second thinned by forming the deep storage because the rigidity of the battery case improved by the metal it is possible to enhance the rigidity of the metal barrier layer, sealing the battery case can be prevented from being easily broken even if the bent portion The.
Problem solving means
[12]
The pouch type battery case according to the present invention for achieving this purpose,
[13]
A pouch-shaped battery case to embed the electrode assembly of a structure in which a separator is interposed between an anode and a cathode with an electrolyte,
[14]
Outer coating layer of the polymer resin constituting the outer surface of the battery case in order to protect the battery cells from outside;
[15]
Located on the inner side of the outer coating layer, a metal to provide a moisture-barrier and heat-conductive barrier layer; And
[16]
Inner sealant layer of a polymer resin located on the inner side of the metal barrier layer with a heat-sealable;
[17]
And including,
[18]
The metal blocking layer may be formed of a structure including a second metal having an excellent moldability first metal and a high rigidity.
[19]
Generally, the pouch-shaped battery keyiseuyong laminated sheet is composed of a inner sealant layer for the outer coating layer, a metal barrier layer and a seal to prevent penetration of the material of the outermost layer.
[20]
The outer coating layer because it protects the cells from the outside and excellent in tensile strength, weather resistance and so on required thickness is prepared using a lot of oriented nylon film. The metal barrier layer serves to prevent air, moisture or the like from entering the interior of the cell, aluminum is mainly used.
[21]
The inner sealant layer is responsible for providing the cross-seal is heat-sealed by application of heat and pressure in a state in which a built-in electrode assembly and mainly consists of the new lead-free polypropylene film (CPP). Bar, which may be added include an adhesive layer between the outer cover layer and the barrier metal layer and / or the metal barrier layer and the inner sealant layer and serves to compensate for the low adhesion between the layers on both sides of the adhesive layer.
[22]
The pouch type battery case according to the present invention may be stored in a thick electrode assembly bar comprising a metal barrier layer and a second metal having a first metal and a high stiffness is excellent in moldability, due to demand for high-capacity secondary batteries this can formability that can be produced an improved battery case.
[23]
Further, even if compared with the battery case containing the prior only the ductility and formability is good metal, by a second metal having high rigidity, the battery case is thin, the electrode assembly is formed to secure the barrier properties of the outer material and, the mechanical stress on the battery case can be prevented from being broken even if applied, sealing performance can be provided an improved battery case.
[24]
The first metal is, if superior formability and ductility material not the kind is not particularly limited, for example, may be formed of aluminum or aluminum alloy material, the second metal is, if a high rigidity material to its kind is not particularly limited It not, for example, is a stainless steel-based materials.
[25]
The metal blocking layer may be disposed to form a second metal layer including a first metal layer and the second metal comprising the first metal.
[26]
More specifically, the first metal layer is a metal layer including the first metal as the main metal, the second metal layer is a metal layer containing the second metal as the main metal, the first metal layer and the second metal layer is perpendicular may be made of a layered structure stacked in the direction, or may be formed of an alternating arrangement is in a horizontal direction.
[27]
In one specific example, between the first metal layer and the second metal layer may be a structure in which an adhesive layer is added. That is, the first metal layer and second metal layer or a layered structure stacked in the vertical direction, or both if a horizontal structure in which directions alternately arranged, in the plane in which the first metal layer and the second metal layer facing the adhesive layer is interposed It made of a structure.
[28]
The metal barrier layer is a plurality of first metal layers and / or as the array bars, the first metal layer and second metal layer which may be composed of a second metal layer to be positioned adjacent to each other two or more first metal layer and / or two or more it is possible to form a metal barrier layer including a second metal layer.
[29]
In another specific embodiment, the metal barrier layer may be formed of a cross-bonded cladding structure by which the first metal and second metal to the rolling.
[30]
In this case, without the interposition of a separate adhesive layer between the first metal layer and second metal layer it may be adhered to each other by rolling between the metals.
[31]
Specifically, the metal barrier layer may be formed of a bonded array structure in which the first metal and second metal are mutually stacked in a thickness direction of the battery case. In addition, the metal barrier layer, the first may be a first metal is added to the bonding arrangement in the other surface of the second metal bonded to the first metal to the thickness direction, said bonded to the second metal to the thickness direction the first may be the second metal is added to the bonding arrangement in the other surface of the metal.
[32]
In another specific example, the metal blocking layer is a first metal and the second may be a second metal is a structure bonded to the alternating arrangement in the width direction perpendicular to the thickness direction of the battery case, the first metal and the transverse direction the first metal may be added to the bonded arrangement, the second metal is added to the bonding arrangement in the other surface of the first metal bonded to the second metal and a width direction in the bonding surface of the second metal structure one can.
[33]
Metal barrier layer made of the cladding structure is part of a second bar which can be made of a sandwiched structure of the metal in, for example, the metal barrier layer of the first metal is a groove formed on a surface of the first metal, the the second metal and may be made of a structure disposed in the groove, or a groove is formed on the surface of the second metal, the second metal can be made to the structure via the groove.
[34]
Alternatively, the metal blocking layer is a through line formed in the inside of the first metal, the second metal can be made to the structure via the through line, or a through line in the interior of the second metal is formed , and the first metal may be made to the structure via the through line.
[35]
The outer coating layer and the metal blocking layer between, and / or wherein the metal barrier layer and the inner sealant layer between, the bar with an adhesive layer may be interposed, between the outer coating layer and the metal blocking layer, or the metal barrier layer and the inner it is possible to compensate for a poor bond between the sealant layer.
[36]
The invention can also, to provide a cell with a built-in electrode assembly and an electrolyte solution in the pouch-shaped battery case, and provides a battery pack including the battery cell.
[37]
Specifically, the battery pack is high temperature stability and can be used in the long cycle characteristics and power of the device is required such as high rate characteristics, a detailed example of such a device, a mobile electronic device (mobile device), wearable electronic devices (wearable device ), the power tool (power tool) moves received power by the motor omniscient; Electric vehicles, including hybrid electric vehicles (Plug-in Hybrid Electric Vehicle, PHEV) including - an electric vehicle (Electric Vehicle, EV), hybrid electric vehicles (Hybrid Electric Vehicle, HEV), plug; Electric bicycles (E-bike), electric two-wheeled vehicle including an electric scooter (E-scooter); Electric golf carts (electric golf cart); And the like electric power storage device (Energy Storage System), but it is not limited to this.
[38]
Structure and its manufacturing method of the devices are so well known in the art, in the present specification a detailed description thereof will be omitted.
Brief Description of the Drawings
[39]
1 is a vertical cross-sectional view of the pouch-shaped battery case in accordance with one embodiment.
[40]
Figure 2 is a vertical cross-sectional view of the pouch-shaped battery case according to another embodiment.
[41]
Figure 3 is a further vertical cross-sectional view of the pouch-shaped battery case according to another embodiment.
[42]
Figure 4 is a further vertical cross-sectional view of the other of the pouch-shaped battery case in accordance with an embodiment of.
[43]
Figure 5 is a further vertical cross-sectional view of another pouch-shaped battery case in accordance with an embodiment of.
[44]
Figure 6 is a further vertical cross-sectional view of the pouch-shaped battery case according to another embodiment.
[45]
Figure 7 is a further vertical cross-sectional view of the pouch-shaped battery case according to another embodiment.
Mode for the Invention
[46]
Reference to the accompanying drawings self having ordinary skill in the art will be described in detail an embodiment that can easily practice the invention. However, if it is determined that in the following description of the detail of the operation principle of a preferred embodiment of the present invention is a detailed description of known functions or constructions may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.
[47]
In addition, the same reference numerals to portions that a similar function and operation throughout the drawings. In the specification, when there is any part connected to the other part, which, as well as if it is directly connected to, placed between the other elements in between, and includes cases that are indirectly connected. Also, it includes a certain component, not excluding the other elements do not have a base material which is particularly opposite, means that may further contain other components.
[48]
According to the invention in the drawings will be described as in the detailed embodiment.
[49]
Figure 1 and Figure 2 shows a vertical cross-sectional view of the pouch-shaped battery case including a metal barrier layer, an adhesive layer is disposed. As shown in Fig.
[50]
1 and 2, the pouch-shaped battery case 100, an outer cover layer 101, a metal blocking layer 110 and inner sealant layer 104, and are sequentially stacked, the outer cover layer 101 and the metal between the barrier layer 110 is interposed the adhesive layer 105. Metal barrier layer 110 is bonded to the adhesive layer 105 is interposed between the laminated in the thickness direction of the first metal layer 102 and the second metal layer (103) state.
[51]
Between the pouch-shaped battery case 200, an outer cover layer 201, a metal blocking layer 210 and inner sealant layer 204, and are sequentially stacked, the outer cover layer 201 and the metal barrier layer 210, the adhesive layer ( 205) are disposed. Metal barrier layer 210 is provided between the first metal layer 202, second metal layer 203 and first metal layer 202 and are stacked in the vertical direction, the first metal layer 202 and the second metal layer 203 the adhesive layer 205 is bonded to the through state.
[52]
3 to 7 shows a vertical cross-sectional view of the pouch-shaped battery case including a metal barrier layer in the cladding structure. Fig.
[53]
3 to Referring to Figure 7, the pouch-shaped battery case 300, an outer cover layer 301, a metal blocking layer 310 and inner sealant layer 304, and are sequentially stacked, a metal blocking layer 310 a first metal 302 and a second metal 303 is mutually laminated in the thickness direction are bonded array.
[54]
Pouch-shaped battery case 300, an outer cover layer 301 and barrier metal layer 310, but the structure via the adhesive layer 305 between the, in some cases, the adhesive layer 305 may be omitted.
[55]
Pouch-shaped battery case 400, an outer cover layer 401, a metal blocking layer 410 and inner sealant layer 404, and are sequentially stacked, a metal barrier layer 410, a first metal 402 and the second metal 403 and a first metal 402 are mutually stacked in the thickness direction are bonded array.
[56]
Pouch-shaped battery case 400, an outer cover layer 401 and barrier metal layer 410, but the structure via the adhesive layer 405 between the, in some cases, the adhesive layer 405 may be omitted.
[57]
Pouch-shaped battery case 500, an outer cover layer 501, a metal blocking layer 510 and inner sealant layer 504, and are sequentially stacked in a vertical direction, a metal barrier layer 510, a first metal 502 and there is a second metal 503 is bonded to the alternate arrangement in the vertical direction of the width to the thickness direction. Width to the number of the first metal 502, and a second metal 503 is capable of selectively applying the necessary changes.
[58]
Pouch-shaped battery case 600, an outer cover layer 601, a metal blocking layer 610 and inner sealant layer 604, and is sequentially stacked in the vertical direction, a metal barrier layer 610, a first metal 602 and of the notches formed in the surface, made of a second metal 603 it is interposed in the groove structure. Size to the number of the grooves is capable of selectively applying the necessary changes.
[59]
Pouch-shaped battery case 700, an outer cover layer 701, a metal blocking layer 710 and inner sealant layer 704, and is sequentially stacked in the vertical direction, a metal barrier layer 710, a first metal 702 the line through the interior of the formed, made of a second metal 703 is interposed in the structure of the through line. Size to the number of the through line is capable of selectively applying the necessary changes.
[60]
In this way, pouch-shaped battery case in accordance with the present invention can improve both the moldability and stiffness of the bar, the battery case including a metal barrier layer and a second metal having a first metal and a high rigidity superior in formability .
[61]
[62]
Those of ordinary skill in the art that the present invention it will be possible to perform a variety of applications and modifications within the scope of the invention as disclosed in the accompanying claims.
Industrial Applicability
[63]
The pouch type battery case according to the present invention includes an inner sealant layer positioned to the battery cell outer coating layer for protection from the outside, a metal barrier layer which is located on the inside of the outer coating layer, and the inner side of the metal barrier layer, wherein metal barrier layer formability is excellent first metal, and due to the softness of the bar, the first metal formed in a structure including a second metal having high rigidity, moldability of the battery case is improved, and the rigidity of the second metal a bar, capable of producing a battery case having high rigidity by the mechanical stress on the battery case can be prevented from being broken even if applied, sealing performance can be provided an improved battery case.

Claims

[Claim 1]A pouch-shaped battery case to embed the electrode assembly of a structure in which a separator is interposed between an anode and a cathode with the electrolyte solution, the outer coating layer of the polymer resin constituting the outer surface of the battery case in order to protect the battery cells from outside; Located on the inner side of the outer coating layer, a metal to provide a moisture-barrier and heat-conductive barrier layer; And an inner sealant layer of the polymeric resin is located with a heat-sealable on the inner side of the metal barrier layer; The metal barrier layer, includes the pouch-shaped battery case including a second metal having an excellent moldability first metal and a high rigidity.
[Claim 2]
The method of claim 1 wherein the first metal is aluminum or an aluminum alloy material, the second metal is a stainless steel-based material, a pouch type battery case.
[Claim 3]
The method of claim 1 wherein the metal barrier layer is a pouch-shaped battery case is disposed in the second metal layer form including a first metal layer and the second metal comprising the first metal.
[Claim 4]
The method of claim 3, wherein the pouch-shaped battery case, which is between the first metal layer and the second metal layer, the adhesive layer is added.
[Claim 5]
The method of claim 1 wherein the metal barrier layer in which a clad structure in the pouch-shaped battery case mutually joined by a first metal and a second metal to the rolling.
[Claim 6]
The method of claim 5, wherein the metal barrier layer includes a first metal and the second metal is a pouch-shaped battery case are mutually stacked in a thickness direction of the battery case, the bonded arrangement.
[Claim 7]
The method of claim 5, wherein the metal barrier layer, the first metal and the second joint of the pouch-shaped first metal is added to the bonding arrangement in the structure on the other surface of the second metal battery case.
[Claim 8]
The method of claim 5, wherein the metal barrier layer includes a first metal and a second metal structure of the pouch-shaped battery case to bonded alternately arranged in a width direction perpendicular to the thickness direction of the battery case.
[Claim 9]
The method of claim 5, wherein the metal barrier layer is a groove formed in the surface of the first metal, the second metal is a pouch-shaped battery case made of a structure disposed in the groove.
[Claim 10]
The method of claim 5, wherein the metal barrier layer is a through line in the interior of the first metal is formed, the second metal is a pouch-shaped battery case made of a structure disposed in the through line.
[Claim 11]
2. The method of claim 1, wherein between the outer cover layer and the barrier metal layer, and / or in the pouch-shaped battery case, which is interposed an adhesive layer between the metal barrier layer and the inner sealant layer.
[Claim 12]
Any one of claims 1 to 11 of the pouch-shaped battery case, an electrode assembly and an electrolyte, the battery cell that is built according to any of the preceding.