Abstract: A lithium battery including an electrode assembly having a cathode, an anode and a separator interposed between the cathode and the anode, a gel-state electrolyte solution having a crosslinking product of prepolymer for forming epoxy resin and amine, a lithium salt and an organic solvent, and a case accommodating the electrode assembly and the electrolyte solution.

Abstract: Provided are a polymeric gel electrolyte comprising a lithium salt, an organic solvent and a thermal curing product of a composition having a terpolymer having a repeating unit represented by formula (1), a repeating unit represented by formula (2) and a repeating unit represented by formula (3): wherein n is an integer from 1 to 12, and R is a C1 to C12 alkyl group, and a lithium battery employing the polymeric electrolyte. Use of a polymeric gel electrolyte according to the present invention can effectively suppress swelling due to an electrolytic solution, and a lithium battery which can prevent reliability and safety from being lowered due to the swelling, can be attained.

Abstract: A method of manufacturing a lithium secondary cell includes preparing an anode precursor and a cathode precursor by coating current collectors with electrode compositions, each not containing a plasticizer, preparing a separator precursor by coating both sides of a porous polymer film which is not gelled by an electrolytic solution with slurry containing an ion conductive polymer and the plasticizer, laminating the anode and cathode precursors and the separator precursor to prepare a cell precursor, and activating the cell precursor by injecting the electrolytic solution into the cell precursor. In the method of manufacturing method of the lithium secondary cell, the lithium secondary cell can be manufactured without a process of extracting a plasticizer using an organic solvent. Thus, environmental contamination due to plasticizer extraction can be prevented, thereby reducing the manufacturing cost of batteries.

Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including at least one organic solvent selected from the group consisting of thiocarbonate, thioester and thioether, and a lithium salt.

Abstract: Provided are a polymeric gel electrolyte comprising a lithium salt, an organic solvent and a thermal curing product of a composition having a terpolymer having a repeating unit represented by formula (1), a repeating unit represented by formula (2) and a repeating unit represented by formula (3): 1

Abstract: A polymeric sol electrolyte including a sol-forming polymer and an electrolytic solution consisting of a lithium salt and an organic solvent. Use of the polymeric sol electrolyte allows problems such as swelling or leakage to be overcome, compared to the case of using a liquid-type electrolytic solution. Also, the polymeric sol electrolyte has better ionic conductivity than a polymeric gel electrolyte. In addition, when the lithium battery according to the present invention is overcharged at 4.2 V or higher, an electrochemically polymerizable material existing in the polymeric sol electrolyte is subjected to polymerization to prevent heat runaway, which simplifies a separate protection circuit, leading to a reduction in manufacturing cost.

Abstract: A lithium secondary battery and a method of manufacturing the battery. In the lithium secondary battery including a positive electrode plate having a positive electrode current collector and a positive electrode sheet having a positive electrode active material fixed to at least one surface of the positive electrode current collector, a negative electrode plate having a negative electrode current collector and a negative electrode sheet having a negative electrode active material fixed to at least one surface of the negative electrode current collector, a separator is interposed between the positive electrode plate and the negative electrode plate, and a coating of a polymer material having a high elongation ratio is present on at least each one outer surface of the positive and negative electrode plates to improve battery safety.

Abstract: A secondary battery includes an electrode assembly formed by sequentially stacking positive electrode plates each having a positive electrode tab formed at one side thereof, negative electrode plate each having a negative electrode tab formed at one side thereof, and separators interposed between the positive electrode plates and the negative electrode plates, for insulating the positive and negative electrode plates from each other, the positive electrode tabs being welded to each other to form a positive electrode tab group, and the negative electrode tabs being welded to each other to form a negative electrode tab group, a case having a lower case part having a space in which the electrode assembly is accommodated, and an upper case part connected to one side periphery of the lower case part and fixed to the lower case part, for hermetically sealing the space of the lower case part, the upper case part and the lower case part having sealing portions at the peripheries thereof to be sealed to each other, a

Abstract: A method of manufacturing a lithium secondary cell includes preparing an anode precursor and a cathode precursor by coating current collectors with electrode compositions, each not containing a plasticizer, preparing a separator precursor by coating both sides of a porous polymer film which is not gelled by an electrolytic solution with slurry containing an ion conductive polymer and the plasticizer, laminating the anode and cathode precursors and the separator precursor to prepare a cell precursor, and activating the cell precursor by injecting the electrolytic solution into the cell precursor. In the method of manufacturing method of the lithium secondary cell, the lithium secondary cell can be manufactured without a process of extracting a plasticizer using an organic solvent. Thus, environmental contamination due to plasticizer extraction can be prevented, thereby reducing the manufacturing cost of batteries.

Abstract: A lithium battery including an electrode assembly having a cathode, an anode, a separator interposed between the cathode and the anode, a gel electrolyte prepared by dissolving a terpolymer having a repeating unit represented by formula (1), a repeating unit represented by formula (2) and a repeating unit represented by formula (3) in an organic solvent having a low boiling point, mixing a lithium salt and organic solvent therewith to obtain a composition for forming an electrolyte, injecting the composition into a case accommodating the electrode assembly or coating on at least one of the cathode, the anode and the separator, and then removing the low boiling point organic solvent from the resultant structure, and the pouch accommodating the electrode assembly and the gel electrolyte: 1

Abstract: A lithium battery including an electrode assembly having a cathode, and anode and a seperator interposed between the cathode and the anode, a gel-state electrolyte solution having a crosslinking product of prepolymer for forming epoxy resin and amine, a lithium salt and an organic solvent, and a case accommodating the electrode assembly and the electrolyte solution.

Abstract: A method for manufacturing a case for a secondary battery includes preparing a case material in a plate state; setting a plurality of sections on the case material, each section including parts for forming a pan for a battery main body, a gas receiving portion disposed at a side of the pan, a path connecting the pan and the gas receiving portion, and a cover portion covering the pan and the gas receiving portion together; forming the pan of the battery main body, the gas receiving portion, and the path by molding the case material; and severing each section from the case material.

Abstract: A secondary battery having an improved sealing structure between electrode tabs acting as terminals of the battery, and a dielectric package, which is capable of preventing leakage of an organic electrolyte. The secondary battery includes a battery body having a positive electrode, a negative electrode and a separator which are stacked, and electrode tabs for inducing current generated therein to the outside; a dielectric package having upper and lower dielectric packages, for enclosing the battery body by sealing edge portions of the upper and lower dielectric packages while the electrode tabs are partially exposed to the outside; and sealing materials including sidearms, coated on predetermined portions of the electrode tabs by a predetermined width, for preventing leakage of an organic liquid electrolyte while being interposed and fused between the edge portions of the upper and lower dielectric packages.

Abstract: A case for a secondary battery includes a pan having a space for accommodating a battery main body and an opening. A first bonding portion extends along the edge of the pan. A second bonding portion extends along the edge of the cover portion for corresponding attachment to the first bonding portion when folded onto the pan. Thus, mass production of the case is possible and the bonding portion becomes firm when the first and second bonding portions are bonded together.

Abstract: The present invention provides a lithium secondary battery for surrounding and hermetically sealing a battery body which generates current, comprising: a first copolymer layer which is the innermost layer for surrounding and hermetically sealing the battery body and is formed of poly(ethylene-co-acrylic acid) (EAA); an aluminum (Al) layer formed on the first copolymer layer; and a first nylon layer which is the outermost layer formed on the Al layer. The case can improve the overall moldability and interlayer adhesiveness and can effectively prevent leakage of an electrolytic solution, thereby increasing the battery reliability.

Abstract: Disclosed are non-flammable electrolyte compositions of the present invention that comprise a mixed solvent comprising carbonate-, thiocarbonate-, and phosphate-based solvents and inorganic additives such as metal compounds or metal halogen compounds. A mixed ratio of carbonate:thiocarbonate:phosphate-based solvent is in the range of 20˜75:5˜30:15˜50. The metal compounds or metal halogen compounds are exemplified by triphenylbismuth carbonate, triphenylbismuth, bismuth subnitrate, bismuth subcarbonate, dimethyl pyrocabonate, diethyl pyrocarbonate, bismuth fluoride, and the like. The inorganic additives are contained in the electrolytes of the present invention in the amounts of about 0.3 to about 5 weight percent of the mixed solvent.