[1]The present invention relates to a secondary battery including a secondary battery and a casing for accommodating this, the electrode assembly. And more particularly, to a secondary battery including a secondary battery packaging material having a function to erase the generated during the charge and discharge of the battery of hydrogen fluoride (HF), and this. [2]This application claims priority to an application for the Korea Patent Application No. 10-2017-0031307, filed on March 13, 2017, all information disclosed in the specification and drawings of that application is hereby incorporated by reference into this application. [3] BACKGROUND [4] This secondary battery according to the shape and material of the case for housing the electrode assembly, the electrode assembly is in a cylindrical battery and a prismatic battery that is embedded in a metallic can of cylindrical shape or square shape, the electrode assembly is incorporated in a pouch type case of aluminum laminate sheet It is classified as a pouch-shaped battery. [5] [6] On the other hand, in general, it may be included in a small amount of water, etc. battery manufacturing process of the battery, especially in the case of a pouch-shaped case has a very high potential for water to penetrate through such sealing regions. When the water present in the cell by various causes, such as the reaction product of HF by the reaction of the cell components is generated. The HF is destroyed the SEI layer and causes a degradation (dissolution) of the cathode, this phenomenon may cause serious problems in safety of the bars and cells more remarkably occur in a high temperature. [7] [8] In this regard, in some prior art discloses a technique of including a predetermined HF scavenger in the cell. For example, Japanese Patent Application Laid-Open No. 1999-283671 discloses a LiF 6 in the secondary battery containing, Mg in the cathode mix x Al y O z (x≥0, y≥0, x + y = 1, z> this technology relates to a rechargeable battery, characterized in that the addition of 0), and discloses, Korea Patent Application Laid-Open No. 2001-0068650 discloses a hydrogen fluoride (HF) gas is derived at least any one electrode, a separator and an electrolytic solution from a fluorine-containing compound to discloses a technique concerning a lithium secondary battery, characterized in that comprises an inorganic base that can be captured. [9] However, the techniques technology bar, the inorganic additives if a large amount present in the region to act directly on the cell operation, greatly reducing the lithium ion mobility, which includes a predetermined inorganic substance to the electrode, a separator and an electrolyte in the form of additives and, it can be a battery performance is the conductivity is reduced accordingly, and can cause a variety of side reactions in the battery. Therefore mothada not solve this problem as fundamental. [10] Detailed Description of the Invention SUMMARY [11] The present invention for solving the foregoing technical problem, the hydrogen fluoride (HF to the inner surface of the casing of the secondary battery (gas), and an object thereof is to provide a) scavengers secondary battery packaging material of the polymer sheet is added containing. Further, the present invention is to provide a secondary battery including the secondary battery in the casing is still another object of the present invention. Other objects and advantages of the other invention will be readily appreciated that this can be realized by the means as claimed and combinations thereof. [12] Problem solving means [13] The present invention provides a secondary battery casing for solving the problem of the prior art. [14] According to a first aspect of the invention, the packaging material may be formed additional receiving corresponding to the shape of the electrode assembly, and a polymer sheet containing a HF scavenger (scavenger) to the inner surface of the packaging material is added, the polymer sheet It will be dissolved under the conditions of pH 3 or less. [15] According to a second aspect of the present invention, in the first aspect, the polymer sheet to the main chain including the general formula (1), (2), the polymer comprising a repeating unit or two or more of the repeating unit represented by General Formula (3) . [16] [17] Formula 1 [18] , [19] [20] [Formula 2] [21] [22] [23] [Formula 3] [24] , [25] Each independently in Formula 1 and X 2 is absent or, a sulfone group (sulfone group), ether group (ether group), a thioether group (thioether group) or an alkyl group (alkyl group) having 1 to 5 carbon atoms, [26] In formula 2 is Y or a sulfone (sulfone group), ether group (ether group), thioether (thioether group) or an alkyl group (alkyl group) having 1 to 5 carbon atoms. [27] Further, a third aspect of the present invention according to the first or second aspect, is that the HF scavenger (scavenger) is supported on the polymer sheet. [28] A fourth aspect of the present invention according to any one of the first through the third aspect, is that the HF scavenger (scavenger) is coated on one side of the polymer sheet. [29] In the fifth aspect of the present invention, any one of the first to fourth aspects, wherein the polymer sheet is that is that the HF scavenger (scavenger) to the coating surface facing the exterior material. [30] A method according to any of the sixth aspect, the first to the fifth aspect of the invention one, the HF scavenger is lithium cobalt oxide (Li 2 CO 3 ), lithium carbonate, sodium carbonate, calcium hydroxide, activated carbon, diatomaceous earth, peorayiteu (perite) is at least one member selected from the group consisting of and zeolite (zeolite). [31] A seventh aspect of the present invention are those, wherein, in the first to the sixth method according to any one of the aspects, the HF content of the scavenger is from 0.01 to 50% by weight, based on the total weight of the polymer sheet. [32] A method according to any one of the eighth aspect, the first to seventh aspect of the invention, the polymer sheet is bonded aid for increasing the binding force of the HF scavenger to the polymer sheet agent added additionally. [33] In the ninth aspect of the invention, any one of the first to eighth aspects, wherein the polymer sheet is to be bonded by using a non-reactive adhesive (nonreactive adhesive) that affect the cell operation, or adhered by heat fusion will be. [34] A tenth aspect of the present invention is the first to ninth process according to any one of the side surfaces, the non-reactive adhesive is a silicone polymer adhesive or a carbon-fiber polymer adhesive. [35] 11th aspect of the invention, the first to the 10 process according to any one of the aspects, it is the secondary battery casing made of a laminate sheet consisting of the outer cover layer and the barrier layer, and an inner sealant layer of a polyolefin of a metal foil of a polymer film . [36] Claim 12 of the present invention aspects, the first to the 11 process according to any one of the side surfaces, the secondary [37] It said polymeric sheet is formed on the upper surface of the inner sealant layer. [38] Further, a thirteenth aspect of the present invention is directed to a secondary battery including the secondary battery casing according to any one of the first to twelfth aspects. [39] 14th aspect of the invention is according to the thirteenth aspect, wherein the battery is a pouch-shaped battery with a built-in electrode assembly in a pouch type case of the laminated sheet. [40] Fifteenth aspect is an electrode assembly including a separator interposed between the positive electrode, a negative electrode and the positive electrode and the negative electrode of the present invention; Electrolyte solution containing a lithium salt and an organic solvent; And a casing accommodating the electrode assembly and an electrolyte, wherein the packaging material is a secondary battery casing according to any one of the first to twelfth aspects. [41] Effects of the Invention [42] Secondary battery packaging material of the present invention, the cell performance when under certain conditions increase the amount of generation of HF to the pH of the electrolyte up to a certain condition HF scavenging agent eluted into the electrolytic solution being the polymer sheet, the dissolution is to minimize the initial side reactions caused by the additive without a worsening of HF it can be removed effectively can exhibit excellent battery performance. That is, HF by erasing agent adsorbed HF present in the cell itself, it is possible to prevent the side reaction are not intended, such as decomposition of the electrode active material or the electrolyte, it is possible to prevent performance deterioration of the battery life characteristics and cell deterioration. [43] Brief Description of the Drawings [44] Intended to illustrate the following figures attached to the specification are exemplary of the invention, the components which serve to further understand the spirit of the invention and together with the description of which will be described later invention, the details of this invention is described in such figures be construed as limited only is not. [45] 1 is an exploded perspective view of a secondary battery including the secondary battery packaging material in accordance with one embodiment of the invention. [46] 2 shows a pouch-type secondary battery according to one specific embodiment of the invention. [47] Figure 3 shows the A-A 'of Figure 2; [48] Figure 4 shows the schematic view showing an embodiment of a secondary battery, the casing having an HF scavenging agent impregnated polymer sheet. [49] Figures 5a and 5b illustrate by a schematic view showing one embodiment of a secondary battery, the casing having an HF scavenging agent coated polymer sheets. [50] Figure 6 is dissolved in a polymer sheet coated on a polymer sheet erase I shows the schematic view showing the shape that is diffused in the electrolytic solution. [51] Best Mode for Carrying Out the Invention [52] Mode for the Invention [53] It will be described in detail below the present invention. The specification and are should not be construed as limited to the terms or general and dictionary meanings used in the claims, the inventor can adequately define terms to describe his own invention in the best way be based on the principle that the interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. Accordingly, the configuration shown in the examples and figures disclosed herein are in not intended to limit the scope of the present merely nothing but the embodiment most preferred embodiment of the present invention invention, a variety that can be made thereto according to the present application point It should be understood that there are equivalents and modifications. [54] Secondary battery casing according to the invention as housed portion is formed corresponding to the shape of the electrode assembly is accommodated to this, and the inner surface polymer sheet (sheet) containing the HF scavenger (scavenger) to the packaging material is added, the polymer sheet is characterized in that the melting in the condition of about 3 or lower pH. [55] In the present invention, the inner side refers to the inside of the exterior packaging material that is incorporated into the interior is not exposed to the outside after sealing of the surface of the exterior packaging material cell surface. [56] [57] Said polymeric sheet is formed in accordance with at least a portion of the inner surface of the packaging material, one embodiment of the polymer sheet is attached either chemically or physically to the inner surface of the casing. According to a specific exemplary embodiment of the invention the polymeric sheet is characterized in that the melting under the conditions of about pH 3. In the present invention, dissolution is a part or all polymer chains separated as an ion bonding, hydrogen bonding, dipole dipole mutual coupling and van der formed between the polymer chains that make up the polymer sheet weaken the coupling by Waals action of the polymer sheet that may mean. [58] [59] According to a specific exemplary embodiment of the present invention wherein the polymer sheet is to may comprise a polymer containing a repeating unit or two or more of the repeating unit represented by Formula 1, Formula 2 or Formula 3. [60] [61] Formula 1 [62] , [63] [64] [Formula 2] [65] , [66] [67] [Formula 3] [68] , [69] [70] Each X is, or in the formulas (1) and (2), can be a sulfone group (sulfone group), ether group (ether group), a thioether group (thioether group) or an alkyl group having 1 to 5 carbon atoms (alkyl group). [71] May also, in formula 2 is Y or, sulfonic groups (sulfone group), ether group (ether group), thioether (thioether group) or an alkyl group having 1 to 5 carbon atoms (alkyl group). [72] In a specific exemplary embodiment of the invention, X and Y in the alkyl group each independently be a. [73] [74] A polymer having a repeating unit of any one of the above Chemical Formulas 1 to 3 is polybenzimidazole (Polybenzimidazole) and polymer is representative of the series, specifically, poly [2,2 '- (m and phenylene) -5,5'- bibenzimidazole] may be mentioned (PBI) and poly [2,5-benzimidazole] (ABPBI). [75] [76] The polybenzimidazole-based polymer includes an aromatic ring, and has a π-π interaction in the planar structure. In addition, the interactions between polymer chains to the effect of hydrogen bonding of the NH structure of the polymer chains is very strong in the electrolyte properties are very strong. [77] [78] The polybenzimidazole-based polymers in the strong acid conditions H + ion the nitrogen atom (N) when the polymer chains to fold around the positive charges are significantly and by electrical repulsion between chains pulrige the aggregation state of polymer chains This polymer sheet It is dissolved. [79] [80] According to a specific exemplary embodiment of the invention the polymeric sheet can be supported HF scavenging agent. Or, according to other exemplary embodiments the polymer sheet apparently is the HF scavenging agent coated on one side thereof. Wherein the HF scavenger method of coating a method or HF scavenger to supported on the polymeric sheet on the surface of the polymer sheet, but may follow the method described below it is not particularly limited thereto. [81] [82] First pole obtain a uniform solution by dissolving a Revenge imidazole-based polymer powder under a high-temperature high-pressure state to a mixture of LiCl and DMAc. Another method is by refluxing a polybenzimidazole based polymer powder in a mixture of NaOH and ethanol to obtain a solution wherein the concentration of NaOH is maintained at about 3%. When such a method the solution of the pole obtained Revenge imidazole series polymer by applying the solution to a substrate such as glass or teflon and excess solvent it can be produced by removing the polymer sheets. [83] [84] In the above-mentioned polymer sheet manufacturing method, the input to the HF scavenger to the polymer solution and dried and the solvent may be HF scavenging agent preparing the polymer-supported sheet. Or, for example by immersion of the polymer sheet in a solution that is HF scavenging agent dispersion can be carried in a polymer sheet. [85] [86] On the other hand, the flow coating method (flow coating), spin coating method (spin coating), dip coating method to coat the HF scavenger to the surface of the polymer sheet by various methods such as (dip coating), bar coating method (bar coating) and, by vaporizing a HF scavenger it may be a method of depositing on the surface of the polymer sheet. [87] [88] The polymer sheet may be attached to the portion of the casing form in the assembly process of the secondary battery. In this case, using a non-reactive adhesive (non-reactive adhesive) that do not affect the cell operation can be bonded by adhesive or heat seal the polymer sheet. [89] [90] When attaching the polymer sheet to a portion at least the inner surface of the exterior packaging material is then attached to a polymer sheet on the battery case producing sheet form a housing having a shape corresponding to the electrode assembly, or a polymeric sheet on the inner surface of the form storage unit after the battery case It can be attached. [91] [92] The non-reactive adhesive is meant an adhesive that does not cause side reactions such as electrolyte or the electrode active material and can be, for example, a silicone adhesive polymer or a carbon-fiber polymer adhesive. [93] [94] The thickness of the polymer sheet in consideration of the size of the storage capacity and electrode assembly of the cell case may be appropriately determined. However, when the thickness of the polymer sheet is too thin, if it is difficult to exert a shock-absorbing effect desired, on the contrary too thick, relatively, so a problem that the battery capacity is reduced, preferably 1㎛ ~ 1 mm in consideration of this work number and, more preferably is 10 ㎛ ~ 0.5 mm. [95] [96] In the polymer sheet in the present invention, it is, contains HF scavenging agent as described above. Therefore, to look at the HF Bar to solve many of the problems that can occur if you are present in the cell, which in further detail below. [97] [98] For example, LiPF the electrolytic solution 6, if it contains a lithium salt, LiPF 6 is Li + and PF 6 - should be present in ionic form, but, intent and the side reaction arose unstable PF as a by-product unlike 5 is generated, H which is present in a very small amount in the electrolyte 2 to form HF by reaction with O. HF is destroyed the SEI layer was sikimyeo cause degradation (dissolution) of the cathode, this phenomenon is more remarkably occur in a high temperature. In particular, HF may increase the battery internal pressure due to generate a large amount of gas by the decomposition of the organic solvent component of the electrolyte solution and because of this the battery explosion. Depending on the kind of lithium salt used as an electrolyte in addition to HF is generated are substances such as HF, HCl, HBr, HI, there is a problem that can act as an acid, such as HF (Acid). [99] This can be considered a method of directly adding the like HF scavenger as a method for in a battery to solve However, in the case of direct addition of such additives in the electrolyte or the electrode assembly as described above, and the movement of lithium ions may decrease, is relatively reduced capacity of the battery, due to the direct contact with the electrode material can cause a variety of side reactions, there is a problem. [100] [101] On the other hand, increases the amount of HF, as in the present invention, under certain conditions, the pH of the electrolyte up to a certain condition of the polymer sheet is dissolved by being HF scavenging agent battery to minimize the initial side reactions occur due to, the additive when eluted with the electrolyte solution because without deteriorating performance can effectively remove HF, it can exhibit excellent battery performance. That is, HF by erasing agent adsorbed HF present in the cell itself, it is possible to prevent the side reaction are not intended, such as decomposition of the electrode active material or the electrolyte, it is possible to prevent performance deterioration of the battery life characteristics and cell deterioration. [102] [103] The HF scavenger is a material that does not degrade the performance of the battery do not react with the electrolyte and the electrode active material, and a known agent capable of adsorbing HF first HF elimination can be used. For example, HF molecules and may be an excellent material chemical bonding or affinity of the HF molecule than between the electrolyte, and preferably, Li 2 CO 3 , potassium carbonate, lithium carbonate, sodium carbonate, activated charcoal, calcium hydroxide, diatomaceous earth, peorayiteu (perite) and but one member selected from the group consisting of zeolite (zeolite) or be equal to or greater than two, but is not limited to these. [104] [105] The content of the HF scavenger is preferably be contained in an amount of 0.01 to 50% by weight based on the total weight of the polymer sheet. When the amount of the HF scavenger is too small, it is difficult to expect the HF absorption effect of the desired degree, whereas too many cases, by the amount which does not bond to the polymeric sheet, eluting with an electrolytic solution increase Direct addition of HF scavenger in the electrolyte the following problems occur when, and battery capacity, and is not preferable in terms of weight reduction. [106] [107] These in the coating process, the bar in a predetermined coupling aid agent may be added to enhance the HF scavenger binding force of a polymer sheet, wherein the coupling assist agent, or to cause a chemical reaction in the battery is not particularly limited, and for example , there may be mentioned the PVdF, a fluorine-based polymers, PVdF copolymer polymers such as PTFE, PMMA, PAN, PEO, SBR and the like. [108] [109] In some cases, it may be included to add moisture scavenging agent to said polymer sheet, or may contain some moisture or erased instead HF scavenger in a separate polymeric sheet of polymer sheet I. For example, there may be included whereby the polymer sheet comprising HF scavenger and the water scavenging agent at the same time in addition to the inner surface of the battery case. Alternatively, a surface of the battery case is provided with a scavenging agent comprises an HF addition polymer sheet, the other surface there may also be included by being a polymer sheet containing a water-absorbing agent is added. Thus, not only it can remove an acid such as HF, may be essential to prevent its occurrence itself. [110] [111] The water scavenger is a material that does not degrade the performance of the battery do not react with the electrolyte and the electrode active material, preferably activated carbon (Activated Carbon), zeolite (Zeolite), alumina (Alumina), silica gel (Silica Gel), the day after sieve (Molecular sieve), magnesium (magnesia: MgO) and titanium dioxide: (titania TiO 2 , but) the number is more than one or two selected from the group consisting of, but is not limited to these. [112] [113] The packaging material may be formed from a laminated sheet consisting of an external cover layer and the barrier layer, and an inner sealant layer of a polyolefin of a metal foil of a polymer film. The outer coating layer because it must have excellent resistance from the external environment, it is necessary to have a predetermined or more tensile strength and weather resistance. A polymer resin of the outer resin layer in such an aspect can be preferably used a stretched nylon film or polyethylene terephthalate (PET). The barrier layer may be aluminum, preferably, to exert the function of improving the strength of the battery case in addition to the ability to prevent entry of foreign matter to leak, such as gas or moisture. The inner sealant layer has a heat-sealable (heat-adhesive), it was hygroscopicity is low, in order to suppress the penetration of the electrolyte, which is a polyolefin (polyolefin) resin that is not expanded or eroded by the electrolytic solution can be preferably used, and more It may preferably be used a new lead-free polypropylene (cPP). [114] [115] The containing portion may be formed to a size corresponding to the electrode assembly at one side of the cell outer package, it may be formed on both sides of the cell outer package. [116] [117] In addition, the present invention relates to a secondary battery including the secondary battery casing. [118] [119] In a specific exemplary embodiment, the secondary battery may be a laminate sheet, specifically, the pouch type secondary battery with a built-in electrode assembly in a pouch type case of the aluminum laminate sheet, especially a metal layer and a resin layer. However, this is not limited, and alternatively a circular or rectangular cans on the electrode assembly is housed in a cylindrical or prismatic metal may be a secondary battery. [120] [121] In the present invention, the secondary battery is constructed in a structure that is the electrolyte is impregnated into the electrode assembly including a separator interposed between the positive electrode to the negative electrode and the positive electrode and the negative electrode. [122] [123] The positive electrode according to a specific exemplary embodiment of the present invention are, for example, the positive electrode current collector coated with a cathode active material in the whole image, is prepared by drying, a binder, and the conductive material and the components described in earlier as needed in connection with the configuration of the anode are more It may also be included. [124] [125] The cathode current collector is generally fabricated to have a thickness of 3 to 500 ㎛. The cathode current collector, if it has suitable conductivity without causing chemical changes in the fabricated battery is not particularly limited, for example, the surface of stainless steel, aluminum, nickel, titanium, sintered carbon, or aluminum or stainless steel on carbon, nickel, titanium and the like may be used as a surface treatment or the like. In addition, the anode current collector may also improve the adhesion of the positive electrode active material to form fine irregularities on the surface thereof, films, sheets, foils, nets, porous structures, foams and non-woven fabrics and so on can take various forms. [126] [127] The positive electrode active material is lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ) layered compounds or one or more transition compounds substituted with a metal such as; Formula Li 1 + x Mn 2-x O 4 (where, x is from 0 to 0.33), LiMnO 3 , LiMn 2 O 3 , LiMnO 2 Li-Mn oxide and the like; Lithium copper oxide (Li 2 CuO 2 ); LiV 3 O 8 , LiFe 3 O 4 , V 2 O 5 , Cu 2 V 2 O 7 including the vanadium oxide; Formula LiNi 1 - x M x O 2 (where, the M = Co, Mn, Al, Cu, Fe, Mg, B or Ga, x = 0.01 ~ 0.3 Im) Ni site type lithium nickel oxide which is represented by; Formula LiMn 2 - x M x O 2 (where, M = Co, Ni, Fe , Cr, and Zn, or Ta, x = 0.01 ~ 0.1 Im) or Li 2 Mn 3 MO 8 (where, M = Fe, Co, lithium manganese composite oxide represented by Ni, Cu or Zn); A portion of Li is substituted with alkaline earth metal ions formula LiMn 2 O 4 ; Disulfide compounds; Fe 2 (MoO 4 ) 3 And the like, but is not limited to these. [128] The cathode current collector is coated with a negative electrode material containing a negative electrode active material and a binder to the entire production phase and W in a dry and compressed, if necessary, may be components such as conductive material and filler were included as further optional. [129] The cathode material includes, for example, I carbon such as graphitized carbon, graphite-based carbon; Li x Fe 2 O 3 (0≤x≤1), Li x WO 2 (0≤x ≤1), Sn x Me 1 -x Me ' y O z (Me: Mn, Fe, Pb, Ge; Me' : Al, B, P, Si, Group 1 of the Periodic Table, Group 2, Group 3 element, a halogen; a metal composite oxide, such as 1≤z≤8); 0