Art [1] Mutual citations and related application (s) [2] This application claims the benefit of priority based on 112 dates Korea Patent Application No. 2017-0005598, and No. 112 dated Korea Patent Application No. 2018-0004664 May 2018 May 2017, all described in the literature of the Korea Patent Application content of which is incorporated as a part hereof. [3] [4] Art [5] The present invention relates to a lithium secondary battery comprising the nonaqueous electrolyte and it comprises an oligomeric additive. BACKGROUND [6] Recently, increasing interest in energy storage technology. In particular, mobile phones, camcorders and notebook PC, and further expand its application far as electric vehicles, it is increasingly embodied a commitment to research and development of energy-saving technologies. [7] The electrochemical device is a field in the most attention among these energy storage technology, particularly there is emerging interest in the secondary battery can be charged and discharged. [8] The lithium secondary battery developed in the early 1990s from the secondary battery that is currently being applied has been highlighted in a high working voltage is much greater energy density points. [9] And the lithium secondary battery comprises a non-aqueous electrolyte comprising an electrolyte salt and a separator, and an electrolyte solvent, which is interposed between an anode and a cathode, the anode and the cathode. [10] On the other hand, the electrolyte solvents because the decomposition or at the electrode surface of the charge and discharge of the battery, a co-intercalation (co-intercalation) between the negative electrode carbon material layer collapses the anode structure, it is possible to inhibit the stability of the battery. [11] This problem is known that during the initial charging of the cell can be solved by a solid electrolyte interface (solid electrolyte interface, SEI) film formed on the anode surface by reduction of the electrolyte solvent. [12] However, if the SEI film is a lithium secondary battery is to be activated or allowed to stand under a high-temperature environment, it is easy to collapse by electrochemical energy and thermal energy over time. When the SEI film is collapsed, the negative electrode is exposed, while the exposed cathode cause side reactions continue to react with the electrolyte CO, CO 2 , CH 4 , and C 2 H 6 to generate a gas such as. [13] After all, not only lead to cell transformation, such as those affected by cell internal pressure rises to cell swelling (swelling), causing an internal short circuit of the battery cell may be a fire or explosion. [14] Recently non-aqueous method for adding the additive for the SEI film formed to prevent the collapse of SEI film has been proposed in the electrolytic solution. However, while due to such electrolyte additive up the electrolyte oxidation at the anode surface during high temperature reaction, and causes another problem that ultimately increases the irreversible capacity of the secondary battery, and the output characteristics decrease. [15] In order to solve the conventional problems, there is a need to develop on the high temperature storage when the non-aqueous electrolyte and a lithium secondary battery capable of reducing the gas generation. [16] [17] Prior Art Document [18] Republic of Korea Patent Application Publication No. 2009-0015859 No. Detailed Description of the Invention SUMMARY [19] The present invention has been made in view of solving the above problems. [20] The first object of the present invention is to provide a non-aqueous electrolytic solution capable of reducing the gas generation during high-temperature storage. [21] A second object of the present invention is that by containing the non-aqueous electrolyte lithium secondary battery provides a high-temperature storage stability is improved. Problem solving means [22] In order to solve the above problems, in the embodiment of the present invention [23] A lithium salt; The non-aqueous organic solvent; And [24] And as additives to provide a non-aqueous electrolyte comprising an oligomer represented by the general formula (1): [25] Formula 1 [26] [27] In the formula 1, [28] R 1 to R 3 are each independently substituted with fluorine or unsubstituted alkylene group having 1 to 4 rings, [29] R 4 and R 5 are each independently an aliphatic hydrocarbon group or aromatic hydrocarbon group, [30] [31] [32] [33] R 6 and R 7 are each independently an alkyl group having 1 to 10 carbon atoms or [34] ego, [35] Wherein R 8 and R 9 is an alkyl group or a group having 1 to 10 carbon atoms independently , and [36] Wherein R 10 is an aliphatic hydrocarbon group or aromatic hydrocarbon group, [37] R 11 is an alkylene group having 1 to 3 carbon atoms, [38] R 12 is hydrogen or an alkyl group having 1 to 2; [39] N is any integer of 1 to 70, [40] m is any integer of 1 to 3. [41] [42] In the oligomer of formula (1), the aliphatic hydrocarbon group may contain an alicyclic hydrocarbon group or linear hydrocarbon. [43] The alicyclic hydrocarbon group is a small number cycloalkylene group of substituted or unsubstituted 4 to 20 carbon atoms; Isocyanate group-cycloalkylene group of substituted or unsubstituted 4 to 20 carbon atoms containing a (NCO); Cycloalkenyl group substituted or unsubstituted 4 to 20 carbon atoms; And there may be mentioned a substituted or unsubstituted at least one or more selected from the group consisting of unsubstituted heterocycloalkyl alkylene having 2 to 20 carbon atoms. [44] The linear hydrocarbon group is a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms; Isocyanate group-containing substituted (NCO) or unsubstituted alkylene group having 1 to 20 carbon atoms; Xylene alkoxyl group of substituted or unsubstituted C1 to C20; Substituted or unsubstituted alkenylene group of 2 to 20 carbon atoms; And there may be mentioned at least one or more selected from the substituted or non-substituted alkynylene group the group consisting of a ring having 2 to 20 carbon atoms. [45] Also, in the oligomer of the formula (1), the aromatic hydrocarbon group is a substituted or unsubstituted arylene group having 6 to 20 carbon atoms; Or there may be mentioned a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms. [46] [47] Specifically, an oligomer represented by the formula (1) can be given to an oligomer of the formula 1a. [48] [Chemical Formula 1a] [49] [50] In Formula 1a, [51] R 4 and R 5 is an aliphatic hydrocarbon group, each independently, [52] R 8 and R 9 are each independently a, [53] R 10 is an aliphatic hydrocarbon group, R 11 is an alkylene group having 1 to 3 carbon atoms, [54] R 12 is hydrogen or an alkyl group having 1 to 2; [55] N is any integer of from 10 to 20, [56] m is any integer of 1 to 2. [57] [58] More specifically, the oligomer represented by the formula (1a) may be an oligomer represented by the formula 1a-1 to. [59] [Chemical Formula 1a-1] [60] [61] In the formula 1a-1, [62] n is any integer of from 10 to 20. [63] [64] In the non-aqueous liquid electrolyte of the present invention, an oligomer of the formula (1) is a non-aqueous electrolyte based on a total weight of 0.5% by weight to 20% by weight of a, it can be included in a 1% to 10% by weight particularly. [65] Further, the weight average molecular weight (MW) of the oligomer represented by the formula (1) is 1,000 g / mol to about 10,000 g / mol, specifically 3,000 g / mol to about 8,000 g / mol, and more particularly 3,000 g / mol to about 5,000 g / mol may be. [66] [67] In one embodiment of the present invention [68] Interposed between the cathode, the anode, the cathode and the anode separator, and [69] It provides a rechargeable lithium battery including a non-aqueous liquid electrolyte of the present invention. Effects of the Invention [70] According to one embodiment of the present invention by including an oligomer having a specific structure as an additive, CO or CO generated in a secondary battery during high temperature storage 2 can be prepared a lithium secondary battery, a non-aqueous electrolytic solution capable of reducing the gas and the like. Further, it is possible to manufacture a high-temperature storage stability and improved lithium secondary battery, by including them. Brief Description of the Drawings [71] Following figures attached to this specification are intended to illustrate preferred embodiments of the present invention, the components which serve to further understand the teachings of the present invention with the content of the above-described invention, the invention is only to details set forth in those figures It is limited and are not to be construed. [72] Figure 1 is a graph illustrating results of analysis on Test Example 1 The thickness increase rate during the high temperature storage of the lithium secondary battery in (%) according to the present invention; Best Mode for Carrying Out the Invention [73] A detailed explanation follows below with more detail the present invention. [74] Herein and in the terms or words used in the claims is general and not be construed as limited to the dictionary meanings are not, the inventor can adequately define terms to describe his own invention in the best way on the basis of the principle that the interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. [75] A "*", unless otherwise specified in the present invention refers to a connected part between the same or different atom or an end portion of the formula. [76] [77] One embodiment of the present invention, [78] A lithium salt; [79] The non-aqueous organic solvent; And [80] As an additive to provide a non-aqueous electrolyte comprising an oligomer represented by the general formula (1). [81] Formula 1 [82] [83] In the formula 1, [84] R 1 to R 3 are each independently substituted with fluorine or unsubstituted alkylene group having 1 to 4 rings, [85] R 4 and R 5 are each independently an aliphatic hydrocarbon group or aromatic hydrocarbon group, [86] R 6 and R 7 is an alkyl group or 1 to 10 carbon atoms independently , and [87] Wherein R 8 and R 9 is an alkyl group or a group having 1 to 10 carbon atoms independently , and [88] R 10 is an aliphatic hydrocarbon group or aromatic hydrocarbon group, [89] R 11 is an alkylene group having 1 to 3 carbon atoms, [90] R 12 is hydrogen or an alkyl group having 1 to 2; [91] N is any integer of 1 to 70, [92] m is any integer of 1 to 3. [93] [94] In this case, the group in the oligomer of the formula (1), wherein the aliphatic hydrocarbon group may comprise a cycloaliphatic hydrocarbon group or linear hydrocarbon. [95] The alicyclic hydrocarbon group is a small number cycloalkylene group of substituted or unsubstituted 4 to 20 carbon atoms; Isocyanate group-cycloalkylene group of substituted or unsubstituted 4 to 20 carbon atoms containing a (NCO); Cycloalkenyl group substituted or unsubstituted 4 to 20 carbon atoms; And there may be mentioned a substituted or unsubstituted at least one or more selected from the group consisting of unsubstituted heterocycloalkyl alkylene having 2 to 20 carbon atoms. [96] The linear hydrocarbon group is a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms; Isocyanate group-containing substituted (NCO) or unsubstituted alkylene group having 1 to 20 carbon atoms; Xylene alkoxyl group of substituted or unsubstituted C1 to C20; Substituted or unsubstituted alkenylene group of 2 to 20 carbon atoms; And there may be mentioned at least one or more selected from the substituted or non-substituted alkynylene group the group consisting of a ring having 2 to 20 carbon atoms. [97] Also, in the oligomer of the formula (1), the aromatic hydrocarbon group is a substituted or unsubstituted arylene group having 6 to 20 carbon atoms; Or there may be mentioned a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms. [98] [99] Specifically, an oligomer represented by the formula (1) can be given to an oligomer of the formula 1a. [100] [Chemical Formula 1a] [101] [102] In Formula 1a, [103] R 4 and R 5 is an aliphatic hydrocarbon group, each independently, [104] R 8 and R 9 are each independently a, [105] R 10 is an aliphatic hydrocarbon group, R 11 is an alkylene group having 1 to 3 carbon atoms, [106] R 12 is hydrogen or an alkyl group having 1 to 2; [107] N is any integer of from 10 to 20, [108] m is any integer of 1 to 2. [109] [110] More specifically, the oligomer represented by the formula (1a) may be an oligomer represented by the formula 1a-1 to. [111] [Chemical Formula 1a-1] [112] [113] In the formula 1a-1, [114] n is any integer of from 10 to 20. [115] [116] Oligomers of the formula (1) is used as an additive for non-aqueous electrolyte of the present invention at the same time to self-containing hydrophilic segment of an acrylate-based functional group capable of forming a cross-linked to the both ends, substituted with a hydrophobic moiety fluoride because it includes an alkylene group, it is possible to perform a surface active agent (surfactant) function within the cell to lower the surface resistance of the electrode interface. Therefore, the non-aqueous electrolyte comprising an oligomer of the formula (1) can be improved than the wetting effect. As well, the oligomer of the formula (1) is it has the ability to dissociate the Li salt can improve lithium ion mobility, in particular, very electrochemically stable in the repeating units of the main chain, as the reactivity of the Li-ion since it comprises a low fluorine-substituted ethylene, lithium ion (Li + CO or CO when it is possible to control a decomposition reaction of a) a side reaction, and a lithium salt (salt) such as overcharge or high-temperature storage 2 reducing gas generation, such as can do. Thus, it is possible to prevent the battery cell strain or internal short-circuit occurs, it is possible to improve the high temperature storage stability of the lithium secondary battery. [117] [118] According to one embodiment of the invention, an oligomer represented by the formula (1) wherein the non-aqueous electrolyte additive is a non-aqueous electrolyte total weight 0.5% by weight to 20% by weight, based on the can be included in a 1% to 10% by weight particularly. [119] To 0.5% by weight less than occurs when gas reduction amount of the additive is negligible, and if the content of the additives exceeds 20% by weight, the resistance increased by a large excess of the oligomer, and the like cycle characteristics may be degraded. [120] [121] Further, according to one embodiment of the invention, the weight average molecular weight (MW) of the oligomer represented by the formula (1) can be adjusted by the number of repeat units, from about 1,000 g / mol to about 10,000 g / mol, specifically 3,000 g / mol to about 8,000 g / mol, and more specifically can be 3,000 g / mol to about 5,000 g / mol days. [122] When the weight average molecular weight of said oligomer is within the above range, the protective layer may be effectively formed on the positive electrode and the negative electrode surface. If, when the weight average molecular weight of the oligomer is less than 1,000 g / mol, it is because the reduction in the number of fluorine to control the side reaction of electrolyte-substituted repeat units, the side-reaction inhibiting effect of the electrodes and the electrolyte can be lowered. On the other hand, if the weight average molecular weight of the oligomer exceeds 100,000 g / mol, the properties of the oligomer itself is stiff (rigid), low electrolyte solvent and affinity as well as to be dissolved is difficult, in an electrolyte solution prepared by a high molecular weight and the viscosity can be greatly wettability of the non-aqueous electrolyte within the electrode and membrane degradation to increase, whereby the overall performance of the lithium secondary battery can be reduced accordingly. [123] The weight average molecular weight is gel permeation chromatography (Gel Permeation Chromatography: GPC) by a molecular weight of the can means the converted value for the standard polystyrene measured by, unless specifically defined otherwise, can mean a weight average molecular weight. For example, the present invention, measured with a Agilent 1200 Series GPC 社 condition, wherein the column can be used for the Agilent 社 PL mixed B columns used, the solvents can be used to THF. [124] [125] On the other hand, the lithium salt in the nonaqueous electrolyte according to an embodiment of the present invention can be used without limitation, those which are used as the electrolyte salt for a lithium secondary battery, for example, Li as the cationic + anionic, and include F - , Cl - , Br - , I - , NO 3 - , N (CN) 2 - , BF 4 - , ClO 4 - , AlO 4 - , AlCl 4 - , PF 6 - , SbF 6 - , AsF 6 - , BF 2 C 2 O 4 - , BC 4 O 8 - , (CF 3 ) 2 PF 4 - , (CF 3 ) 3 PF 3 - , (CF 3 ) 4 PF 2 - , (CF 3 ) 5 PF - , (CF 3 ) 6 P - , CF 3 SO 3 - , C 4 F 9 SO 3 - , CF 3 CF 2 SO 3 - , (CF 3 SO 2 ) 2 N - , (F 2 SO 2 ) 2 N - , CF 3 CF 2 (CF 3 ) 2 CO - , (CF 3 SO 2 ) 2 CH - , CF 3 (CF 2 ) 7 SO 3 - , CF 3 CO 2 - , CH 3 CO 2 - , SCN - , and (CF 3 CF 2 SO 2 ) 2 N - it can include at least one selected from the group consisting of. The lithium salt according to one or required may be used by mixing two or more. The lithium salt is typically be suitably changed to the extent possible the use, but in order to obtain a corrosion resistant film-forming effect of the optimum electrode surface, may include a concentration of 0.8 M to about 2M, particularly 0.8M to 1.5M in the electrolyte have. [126] [127] In addition, the non-aqueous organic solvent contained in the non-aqueous electrolyte according to an embodiment of the present invention may be a decomposition due to oxidation minimized in the charge-discharge process of the secondary battery, so long as it can exhibit the desired properties with additives especially It does not limit, for example, can be used as a mixture ether-based solvents, ester-based solvents, amide-based solvents or the like, each alone, or two or more kinds. [128] In an ether solvent of said organic solvent is dimethyl ether, diethyl ether, dipropyl ether, methyl ethyl ether, available methyl propyl ether, and any one or a mixture of two or more of those selected from the group consisting of: ethyl propyl ether, but , and the like. [129] In addition, the ester solvent may include at least one or more compounds selected from the cyclic carbonate compound, a linear carbonate compound, a linear ester compound, the group consisting of a cyclic ester compound. [130] Specific examples of double the cyclic carbonate compound is ethylene carbonate (ethylene carbonate, EC), propylene carbonates (propylene carbonate, PC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate , 2,3-pen there is any one or a mixture of two or more of those selected from ethylene carbonate, vinylene carbonate, and the group consisting of ethylene carbonate (FEC) fluoro. [131] Further, specific examples of the linear carbonate compounds include the group consisting of dimethyl carbonate (dimethyl carbonate, DMC), diethyl carbonate (diethyl carbonate, DEC), dipropyl carbonate, ethyl methyl carbonate (EMC), methyl propyl carbonate and ethyl propyl carbonate the one or the like of two or more of a mixture thereof is selected from may be used as a representative, and the like. [132] The linear ester compound two of any one thereof is selected from the specific examples of methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, and butyl propionate group consisting of or more such as the mixture may be used as a representative, and the like. [133] The cyclic ester compound is the specific example γ- butyrolactone, two or more of any one or combinations selected from a lactone, γ- caprolactone, lactone, such as the group consisting of ε- caprolactone as σ- ballet as γ- ballet species the mixture can be used for, but is not limited to this. [134] The cyclic carbonate compound in an ester solvent may be used preferably because good dissociate a lithium salt in a high dielectric constant is used as the organic solvent having a high viscosity electrolyte, a low viscosity such as this cyclic carbonate compound as dimethyl carbonate and diethyl carbonate, a numeral that using a mixture of dielectric constant linear carbonate compound and linear ester compound in an appropriate ratio can make the electrolytic solution having high electric conductivity may be used more preferably. [135] [136] On the other hand, the non-aqueous electrolyte lithium secondary battery according to an embodiment of the present invention may further include additional additives as needed. In addition, the additive can be used in the present invention is mixed vinylene carbonate, vinyl ethylene carbonate, fluoro-ethylene carbonate, vinyl ethylene carbonate, cyclic sulfite, saturated sultone, unsaturated sultone, non-annular sulfone, etc., each alone or in combination and it can be used. [137] In this case, the cyclic sulfites include ethylene sulfite, methyl ethylene sulfite, ethyl ethylene sulfite, 4,5-dimethyl ethylene sulfite, 4,5-diethyl ethylene sulfite, propylene sulfite, 4,5-dimethyl propylene sulfite, 4,5-diethyl propylene sulfite, 4,6-dimethyl propylene sulfite, 4,6-diethyl propylene sulfite, 1,3-butylene, and the like, and glycol sulfite, saturated sultone It includes 1,3-propane sultone, 1,4-butane sultone and the like, unsaturated sultone include ethene sultone, 1,3-propene sultone, 1,4-butene sultone, 1-methyl-1,3 -propene sultone and the like, non-cyclic sulfones include divinyl sulfone, and the like, dimethyl sulfone, diethyl sulfone, methyl ethyl sulfone, methyl vinyl sulfone. [138] The additional additives may be included, and the two or more species may be used are mixed, from 0.01 to 5% by weight based on the total amount of the electrolytic solution, in particular 0.01 to 3% by weight, more preferably 0.05 to 3% by weight. The additional When the content of additives is less than 0.01% by weight when the of the battery low-temperature output improved, and high-temperature storage characteristics and high-temperature cycle life characteristics improving effect insignificant, and the amount of the additional additives is more than 5% by weight of the charge and discharge of the battery when there is a possibility of excessive side reactions in the electrolyte. In particular, the additional additives mothayeo not sufficiently decomposed at a high temperature at the time to be added in excess, there can be, and in the electrolytic solution at room temperature, there remains unreacted or precipitated. Accordingly, there can be a side reaction that the life or resistance characteristics of the secondary battery degradation. [139] [140] In one embodiment of the present invention [141] The membrane and interposed between the positive electrode and the negative electrode, the positive electrode and the negative electrode [142] It is possible to provide a lithium secondary battery comprising the nonaqueous electrolyte of the present invention. [143] [144] Specifically, the lithium secondary battery of the present invention can be produced by injecting a non-aqueous liquid electrolyte of the present invention, the electrode structure comprising a separator interposed between the positive electrode, a negative electrode and the positive electrode and the negative electrode. At this time, the positive electrode, negative electrode and separator constituting the electrode structure may be used in all the things that were commonly used in manufacturing the lithium secondary battery. [145] The positive electrode may be manufactured by forming a positive electrode material mixture layer on a positive electrode collector. The positive electrode material mixture layer can be formed by drying, rolling, and then coating the cathode slurry comprising a cathode active material, a binder, a conductive material and a solvent or the like onto the positive electrode collector. [146] The cathode current collector is so long as it has suitable conductivity without causing chemical changes in the fabricated battery is not particularly limited, for example, stainless steel, aluminum, nickel, titanium, sintered carbon, or carbon on the surface of aluminum or stainless steel , nickel, titanium, can be used as such as to a surface treatment or the like. [147] The positive electrode active material is a reversible intercalation and de capable of intercalation compounds of lithium, specifically, it may comprise a lithium composite metal oxide containing at least one metal and lithium such as cobalt, manganese, nickel or aluminum have. More specifically, the lithium composite metal oxide is the lithium-manganese-based oxide (for example, LiMnO 2 , LiMn 2 O 4 and the like), lithium-cobalt oxide (e.g., LiCoO 2 and the like), lithium-nickel-based oxide (for example, LiNiO 2 and the like), lithium-nickel-manganese-based oxide (for example, LiNi 1 - Y Mn Y O 2 (where, 0 [178] Example 1 [179] (The non-aqueous electrolyte, Ltd.) [180] 1M LiPF 6 is dissolved in a non-aqueous organic solvent (ethylene carbonate (EC): ethyl methyl carbonate (EMC) = 3: 7 volume ratio) wherein the 95g compound of formula 1a-1 (n = 10, weight average molecular weight (Mw): 3,000 g / mol) was added to 5g prepare a non-aqueous liquid electrolyte of the present invention. [181] [182] (Secondary Battery Co., Ltd.) [183] As a cathode active material (LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 ; NCM) 94% by weight, of a conductive material of carbon black (carbon black) 3% by weight, a solvent for polyvinylidene fluoride, 3 weight% of a binder which was prepared N- methyl-2-pyrrolidone (NMP), a positive electrode active material slurry (solid content 50%) was added to. After the positive electrode active material slurry is applied to a thickness approximately the positive electrode collector of aluminum (Al) film of 20㎛ and dried to produce a positive electrode, a positive electrode subjected to a roll press (press roll) was prepared. [184] A carbon powder, a binder, a negative electrode active material to PVDF, the conductive material of carbon black (carbon black), respectively 96 wt%, 3 wt% to 1 wt% was added to the solvent NMP negative electrode active material slurry (solid content 80%) It was prepared. After the above is a negative electrode active material slurry was applied to a thickness of the anode current collector, copper (Cu) thin film of 10㎛ and dried to produce a negative electrode, a negative electrode subjected to a roll press (press roll) was prepared. [185] The positive electrode, negative electrode and a polypropylene / polyethylene / polypropylene (PP / PE / PP) stacking a separator consisting of three layers, to thereby prepare an electrode assembly, and by accommodating them in a battery case and injecting the non-aqueous electrolyte thus prepared lithium to prepare a secondary battery (Full cell). [186] [187] Example 2 [188] When the non-aqueous electrolyte is prepared, is to prepare a non-aqueous secondary battery comprising a method similar to the Example 1, and this electrolyte solution except that the addition of non-aqueous organic solvent 90g 10g The compound of the formula 1a-1 in. [189] [190] Example 3. [191] When the non-aqueous electrolyte is prepared, is to prepare a non-aqueous secondary battery comprising a method similar to the Example 1 except that the electrolyte solution and this was added to 1g of the compound of the formula 1a-1 in a non-aqueous organic solvent, 99g. [192] [193] Example 4. [194] When the non-aqueous electrolyte is prepared, non-aqueous organic solvent to 95g compound (weight-average molecular weight (Mw): 1,000 g / mol) of the formula 1a-1 above, except that the addition of 5g is a non-aqueous as in Example 1 and the same method as to prepare an electrolytic solution and a secondary battery including the same. [195] [196] Example 5. [197] When the non-aqueous electrolyte is prepared, is to prepare a non-aqueous secondary battery comprising a method similar to the Example 1 except that this electrolytic solution, and adding 20g of the compound of formula 1a-1 wherein the non-aqueous organic solvent 80g. [198] [199] Example 6. [200] When the non-aqueous electrolyte is prepared, the compound of formula 1a-1 wherein the non-aqueous organic solvent, 95g (weight average molecular weight (Mw): 10,000 g / mol) and is a non-aqueous in a manner similar to that of example 1 except that the addition of 5g to prepare an electrolytic solution and a secondary battery including the same. [201] [202] Example 7. [203] When the non-aqueous electrolyte is prepared, non-aqueous organic solvent to the compound 99.7g (n = 10, weight average molecular weight (Mw): 3,000 g / mol) of the formula 1a-1 above, except that the addition of 0.3g is Example 1 and a non-aqueous electrolyte solution was prepared in the same method and a secondary battery including the same. [204] [205] Example 8. [206] When the non-aqueous electrolyte is prepared, is to prepare a non-aqueous secondary battery comprising a method similar to the Example 1 except that this electrolytic solution, and adding 25g of the compound of formula 1a-1 wherein the non-aqueous organic solvent 75g. [207] [208] Example 9. [209] When the non-aqueous electrolyte is prepared, non-aqueous organic solvent to 95g The compound of the formula 1a-1 (weight average molecular weight (Mw): 500 g / mol), except that the addition of 5g is a non-aqueous as in Example 1 and the same method as to prepare an electrolytic solution and a secondary battery including the same. [210] [211] Example 10. [212] When the non-aqueous electrolyte is prepared, the compound of formula 1a-1 wherein the non-aqueous organic solvent, 95g (weight average molecular weight (Mw): 20,000 g / mol) and is a non-aqueous in a manner similar to that of example 1 except that the addition of 5g to prepare an electrolytic solution and a secondary battery including the same. [213] [214] Comparative Example 1. [215] (The non-aqueous electrolyte, Ltd.) [216] 1M LiPF 6 the non-aqueous organic solvent to prepare a non-aqueous electrolyte solution by dissolving the (ethylene carbonate (EC): 7 volume ratio: ethyl methyl carbonate (EMC) = 3). [217] [218] (Preparation of lithium secondary battery) [219] Was prepared a lithium secondary battery with a method similar to Example 1. [220] [221] To summarized the construction of the non-aqueous liquid electrolyte of Examples 1 to 10 compared with the non-aqueous electrolyte of Example 1 in Table 1. [222] [223] TABLE 1 [224] [225] Experimental Example [226] Experimental Example 1: High Temperature Performance Evaluation [227] Examples 1 and 2 and the comparative rechargeable lithium battery of Example 1 was charged with 3 hours to 0.1 C rate. Then, the degassing (degas) / resealed (reseal), and is charged by constant current / constant voltage condition by 0.2C at room temperature for up to 4.15V with 0.2C to 3.0V with a constant current discharge conditions to perform the initial charging and discharging. After the initial charging and discharging, the increase (%) in thickness (100% state of charge (SOC)), and then, 60 ℃ stored for each and filled with a 4.15V, at 60 ℃ 10 ju was measured. The results are shown in Fig. [228] Also look at the thickness increase rate (%) of 1, carried out using the electrolyte solution containing the oligomer according to the embodiment of the present invention Example 1, and the secondary battery 2, as compared to Comparative Example 1 with an electrolyte solution containing no oligomer 60 in the four weeks since ℃ can be seen that the thickness increase is significantly reduced. [229] [230] Experimental Example 2: High-temperature storage performance [231] Subjected to a lithium secondary battery manufactured by the lithium secondary battery prepared in Examples 3-10 was charged with 0.1C rate 3 hours. Then, the degassing (degas) / resealed (reseal), and is charged by constant current / constant voltage condition by 0.2C at room temperature for up to 4.15V with 0.2C to 3.0V with a constant current discharge conditions to perform the initial charging and discharging. After the initial charging and discharging, respectively, filled with a 4.15V and stored at 60 ℃ for 6 weeks (SOC 100%) the capacity retention rate of the next, the difference compared to 6 weeks 0 parking cell (%) and the thickness change rate (swelling) was measured . [232] The results are shown in Table 2. [233] TABLE 2 [234] [235] The As shown in Table 2, the lithium secondary batteries prepared in Examples 3 to 6 is then high-temperature storage capacity retention ratio is at least about 94%, after high-temperature storage thickness increase can be seen that about 7.2% or less. [236] On the other hand, the lithium additive are prepared in Examples 3 to 6 and a small amount include a non-aqueous high temperature after storage capacity retention ratio of the embodiment having the electrolytic solution in Example 7 The lithium secondary battery of more than 82.4%, after high-temperature storage thickness growth at 15% it can be seen that the deterioration of contrast secondary battery. [237] Further, in the additive it is provided with a non-aqueous electrolyte that contains excessive For lithium secondary batteries after high-temperature storage due to the storage capacity increases retention of 8 is not less than 86.1%, after high-temperature storage thickness growth rate in Examples 3 to 6 to 13.2% it can be seen that the deterioration of contrast a lithium secondary battery produced. [238] In addition, a weight average molecular weight is carried out provided with a non-aqueous electrolyte containing a low oligomer, for example, after the high temperature storage of the lithium secondary battery, the capacity maintenance rate of 9 is more than 89%, after high-temperature storage thickness growth rate in Examples 3 to 6 to 8.7% it can be seen that the deterioration of contrast a lithium secondary battery produced. [239] On the other hand, when the weight average molecular weight of the non-aqueous embodiments having a liquid electrolyte lithium secondary cell of Example 10, whereas the same level and a lithium secondary battery produced in Example 3-6 to a thickness increase rate of 7%, the molecular weight including a high oligomeric depending on the viscosity of the electrolyte increases by increasing its own, since the wetting property in the cell significantly decreased, the reverse charge efficiency is lowered. Accordingly, due to non-uniform reaction when the high temperature storage can be seen that the capacity retention rate is deteriorated to less than 92.5%. Claims [Claim 1] A lithium salt; The non-aqueous organic solvent; And a non-aqueous electrolyte to the additive comprises an oligomer represented by Formula 1: Formula 1 In Formula 1, R 1 to R 3 are each independently substituted with fluorine or unsubstituted alkylene group of 1 to 4 carbon atoms and, R 4 and R 5 are each independently an aliphatic hydrocarbon group or aromatic hydrocarbon group, R 6 and R 7 are each independently an alkyl group or a group having 1 to 10 carbon atoms , and wherein R 8 and R 9 are independently C 1 each to 10 alkyl group, or of a, R 10 is an aliphatic hydrocarbon group or aromatic hydrocarbon group, R 11 is an alkylene group of a carbon number of 1 to 3, R 12 is hydrogen or an alkyl group having 1 to 2, n is from 1 to 70 It is any integer, m is any integer of 1 to 3. [Claim 2] The method according to claim 1, in the oligomer of the formula (1), the aliphatic hydrocarbon group is a cycloalkylene group of the substituted or unsubstituted 4 to 20 carbon atoms; Isocyanate group-cycloalkylene group of substituted or unsubstituted 4 to 20 carbon atoms containing a (NCO); Cycloalkenyl group substituted or unsubstituted 4 to 20 carbon atoms; And a substituted or unsubstituted C2 to heterocycloalkyl or more of at least one selected from the group consisting of alkylene groups of 20 alicyclic hydrocarbon group, or a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms; Isocyanate group-containing substituted (NCO) or unsubstituted alkylene group having 1 to 20 carbon atoms; Xylene alkoxyl group of substituted or unsubstituted C1 to C20; Substituted or unsubstituted alkenylene group of 2 to 20 carbon atoms; And a substituted or unsubstituted carbon atoms, and at least one linear hydrocarbon group selected from 2 to 20 alkynylene group group consisting of the aromatic hydrocarbon group is a substituted or unsubstituted arylene group having 6 to 20 carbon atoms; Or heteroaryl, the non-aqueous electrolyte will alkylene group of the substituted or unsubstituted 2 to 20 carbon atoms. [Claim 3] The method according to claim 1, the oligomer of the formula (1) is to a non-aqueous electrolyte to the oligomer represented by the general formula 1a. [Chemical Formula 1a] in the formula 1a, R 4 and R 5 are each independently an aliphatic hydrocarbon group, R 8 and R 9 are each independently a, R 10 is an aliphatic hydrocarbon group, R 11 is 1 to 3 carbon atoms an alkylene group, R 12 is hydrogen or an alkyl group having 1 to 2, n is any integer of from 10 to 20, m is any integer of 1 to 2. [Claim 4] The method according to claim 3, the oligomer is a non-aqueous electrolyte to be the oligomer of the formula 1a-1 of the formula 1a. [Chemical Formula 1a-1] in the formula 1a-1, n is any integer of from 10 to 20. [Claim 5] The method according to claim 1, wherein the non-aqueous electrolyte is included in the oligomer is 0.5% to 20% by weight, based on the total weight of the non-aqueous electrolyte of the formula (1). [Claim 6] The method according to claim 5, wherein the non-aqueous electrolyte is included in the oligomer is from 1% to 10% by weight, based on the total weight of the non-aqueous electrolyte of the formula (1). [Claim 7] The method according to claim 1, wherein the non-aqueous electrolytic solution The weight average molecular weight (MW) of the oligomer represented by the formula (1) is a 1,000 g / mol to about 10,000 g / mol. [Claim 8] The system according to claim 7, wherein the non-aqueous electrolytic solution The weight average molecular weight (MW) of the oligomer represented by the formula (1) is a 3,000 g / mol to about 8,000 g / mol. [Claim 9] The method according to claim 8, wherein the non-aqueous electrolytic solution The weight average molecular weight (MW) of the oligomer represented by the formula (1) is a 3,000 g / mol to about 5,000 g / mol. [Claim 10] A separator, and a lithium secondary battery comprising a non-aqueous electrolyte of Claim 1 is interposed between the cathode, the anode, the cathode and the anode.