TECHNOLOGY FOCUS - INDUSTRIAL STANDARDS - Preferred Method: In controlling the short circuit resistance of the secondary battery, the adjusting of the amount comprises adjusting the amount of the polymer electrolyte, such that the critical short circuit resistance is not included in an RSC range having an ignition risk. The RSC range having an ignition risk occurs while the total heating value according to time is within 90% of the maximum level of the total heating value according to time. The heating value satisfies Equation 1: W=(VOC/R1+RSC+R)2xRSC.VOC=an open circuit voltage;R1=a specific resistance of the secondary battery;RSC=a short circuit resistance; andR=a specific resistance of a shorting pin.Also, the short circuit resistance (RSC) satisfies Equation 2: RSC=VSC(R1+R)/VOC-VSC. The calculating of the short circuit resistance (RSC) is performed by applying changes in the measured open circuit voltage to Equation 2. Calculating of the heating value (W) according to time is performed by applying changes in the short circuit resistance (RSC) according to time to Equation 1. Moreover, a positive electrode collector and a negative electrode active material layer are short-circuited in the secondary battery.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The lithium salt is selected from lithium phosphofluoride (LiPF6), lithium borofluoride (LiBF4), lithium bisoxalato borate (LiBOB), lithium antimony fluoride (LiSbF6), lithium arsenic fluoride (LiAsF6), lithium chlorate (LiClO4), lithium carbofluoro sulfate (LiCF3SO3), LiN(CF3SO2)2, LiN(C2F5SO2)2, LiAlO4, LiAlCl4, LiN(CxF2x+1SO2)(CyF2x+1SO2) (where, x and y are natural numbers), LiSO3CF3, and a combination.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The polymer electrolyte further comprises a second monomer selected from: CH2=CR1-C(=O)-O-X; CH2=CR1-O-X; CH2=CR1-O-C(=O)-X; CH2=CH-CH2-O-X; CH2=CH-S(=O)2-X; and CH2=CR1-C(=O)-O-CH2CH2-NH-C(=O)-O-X.R1=H, a 1-10C hydrocarbon, or an aromatic hydrocarbon; andX=a 1-20C hydrocarbon, a halogenated hydrocarbon, an aromatic hydrocarbon or a halogenated aromatic hydrocarbon.The alcohol derivative is selected from polyethyleneglycol, polypropyleneglycol, alkanediol, ethoxylated alkanediol, propoxylated alkanediol, trimethylolpropane, ethoxylated trimethylolpropane, propoxylated trimethylolpropane, ditrimethylolpropane, ethoxylated ditrimethylolpropane, propoxylated ditrimethylolpropane, pentaerythritol, ethoxylated pentaerythritol, propoxylated pentaerythritol, dipentaerythritol, ethoxylated dipentaerythritol, propoxylated dipentaerythritol, bisphenol A, ethoxylated bisphenol A, and propoxylated bisphenol A. The A and B are independently selected from a (meth)acryl group, a vinyl group, a allyl group, a vinylsulfonyl group, and a urethane(meth)acryl group. The non-aqueous organic solvent is from a carbonate, an ester, an ether, a ketone, a nitrile, and a combination. The negative electrode further includes a binder comprising a styrene-butadiene rubber or polyvinylidene fluoride. EXAMPLE - No suitable example given.