Abstract: A battery unit and a lithium secondary battery employing the same are provided. The battery unit includes a positive electrode plate having a positive current collector and a positive active material layer formed on at least one plane of the positive current collector, a positive electrode lead electrically connected with the positive current collector, a negative electrode plate having a negative current collector and a negative active material layer formed on at least one plane of the negative current collector, a negative electrode lead electrically connected with the negative current collector, and a separator interposed between the positive electrode plate and the negative electrode plate, having a width greater than that of each electrode plate, and having different widths of protruding portions which stick out on either side of the electrode plate.

Abstract: A polymer battery pack includes a core pack having a protective circuit module attached to a bare cell, a case having the core pack coupled thereto, the protective circuit module having a portion exposed to an exterior of the case, and a resin enclosing at least a portion of the protective circuit module that is exposed to the exterior of the case. A method of manufacturing a polymer battery pack includes forming a bare cell, forming a core pack having a protective circuit module, coupling the core pack to an interior of the case such that the protective circuit module is exposed to an exterior of the case, and molding the protective circuit module with a resin such that a terminal on the protective circuit module is exposed to an exterior of the resin.

Abstract: A lithium polymer battery comprising an internal sheath, reinforcement members, and an external sheath and a method for manufacturing the same are provided. The lithium polymer battery comprises a pouch-type internal sheath with an electrode assembly positioned therein and a protective circuit module that is attached to the surface thereof to control the charging and discharging processes of the electrode assembly. The battery further comprises reinforcement members that couple with surfaces of the internal sheath and an external sheath for integrally enclosing the internal sheath and the reinforcement members. The external sheath may comprise a tube, a thermally contractible tube, or a melted resin.

Abstract: The present invention relates to an electrolyte for a lithium ion rechargeable battery and a lithium ion rechargeable battery including the same. The electrolyte includes a non-aqueous organic solvent, a lithium salt, and triphenyl phosphate. A lithium ion rechargeable battery including the electrolyte has improved overcharge stability and shows excellent chemical properties including reducing swelling, high-temperature storage stability, and cycle life characteristics.

Abstract: A lithium polymer battery comprising an internal sheath, reinforcement members, and an external sheath and a method for manufacturing the same are provided. The lithium polymer battery comprises a pouch-type internal sheath with an electrode assembly positioned therein and a protective circuit module that is attached to the surface thereof to control the charging and discharging processes of the electrode assembly. The battery further comprises reinforcement members that couple with surfaces of the internal sheath and an external sheath for integrally enclosing the internal sheath and the reinforcement members. The external sheath may comprise a tube, a thermally contractible tube, or a melted resin.

Abstract: A pouch type secondary battery which can prevent a cut portion from electrically contacting a protective circuit module, thereby preventing an electrical short circuit and acceleration of corrosion of a core material and enhancing safety includes an electrode assembly having a first electrode plate, a second electrode plate, and a separator; a pouch case made of a flexible material, and having a container, insulated at least on its inner surface and accommodating the electrode assembly, and sealing portions along an edge of the container, the sealing portions including a first sealing portion through which electrode taps of the electrode assembly extend from the pouch case, and a second sealing portion and a third sealing portion respectively positioned at opposite sides of the first sealing portion, the second an third sealing portions being folded at least one time; a protective circuit module connected to the electrode tips and mounted on an outer surface of the first sealing portion; and a short circuit p

Abstract: A pouch type secondary battery which can prevent a cut portion from electrically contacting a protective circuit module, thereby preventing an electrical short circuit and acceleration of corrosion of a core material and enhancing safety includes an electrode assembly having a first electrode plate, a second electrode plate, and a separator; a pouch case made of a flexible material, and having a container, insulated at least on its inner surface and accommodating the electrode assembly, and sealing portions along an edge of the container, the sealing portions including a first sealing portion through which electrode taps of the electrode assembly extend from the pouch case, and a second sealing portion and a third sealing portion respectively positioned at opposite sides of the first sealing portion, the second an third sealing portions being folded at least one time; a protective circuit module connected to the electrode taps and mounted on an outer surface of the first sealing portion; and a short circuit p

Abstract: A battery unit having at least two pouch type secondary battery cells and a single safety device serving each cell in the battery unit. Each individual battery or cell body fits into a space within a casing. The battery unit may use one or more casings. The battery cells are arranged such that the terminals of different battery cells are located near the terminals of other battery cells within the unit. These terminals are connected to the safety device. The safety device may be a safety circuit board that is positioned in a space within the battery unit so that the battery unit does not consume any more space than when no safety circuit board is used.

Abstract: A pouch type lithium secondary battery includes an electrode assembly including a first electrode plate connected to a first electrode tap, a second electrode plate connected to a second electrode tap, and a separator interposed between the first and second electrode plates. The battery also includes a pouch exterior having an electrode assembly storing portion and at least a wing portion extending from at least an end of the electrode assembly storing portion, the wing portion entirely winding around side faces of the electrode assembly storing portion. A method of fabricating a pouch type lithium secondary battery is also disclosed.

Abstract: A pouch type rechargeable battery that comprises an electrode assembly comprising a first electrode, a second electrode, and a separator interposed between the first and second electrodes is disclosed. The battery further comprises a pouch case comprising a case cover and a case body that is formed with a space for receiving the electrode assembly therein and a sealing part that is formed around the space. The sealing part comprises side sealing sections where the width of each side sealing section is less than the depth of the space.

Abstract: A battery pack raises an alarm under overheated or high pressure conditions in the battery pack. The alarm is raised from the battery pack or an external device that is coupled with the battery pack when the temperature or the pressure of the battery pack exceeds a predetermined level. The battery pack includes a terminal that is coupled with a charging device or an external device, a battery cell coupled with the terminal so that the battery cell can be charged or discharged, a sensor that is installed in the battery cell to detect at least one of a temperature and a pressure of the battery cell, and an alarm unit that compares a value detected by the sensor with a reference level and raises an alarm for a user when the value detected by the sensor exceeds the reference level.

Abstract: Provided are an electrode assembly with improved active material coatings of electrodes, by which an increase in thickness or distortion in shape can be prevented even after repeated charge and discharge cycling, and a lithium ion cell having the electrode assembly.

Abstract: A rechargeable battery that comprises a jelly roll type electrode assembly that comprises two electrodes with different polarities and separators for preventing an electrical short between the two electrodes is disclosed. The battery further comprises a case for storing the electrode assembly and electrode tabs that are made of different materials for connecting the two electrodes of the electrode assembly to an external circuit via the case, wherein the thicknesses of the electrode tabs are different. It is possible to reduce the thickness of a protruded part in an outer surface of the jelly roll due to the thinner electrode tabs and to reduce pressure on the activation materials near the protruded part.

Abstract: A battery unit including an electrode unit including a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate, the separator, and the negative electrode plate are disposed in sequential order; electrode leads extending from each of the positive and negative electrode plates of the electrode unit; and a finishing tape provided on an outermost surface of the electrode unit, including an adhesive layer having a low adhesive strength, and a polymer film layer coated with the adhesive layer, wherein the finishing tape is detachably attached to the electrode unit so as to detach in response to the electrode unit deforming.

Abstract: A pouch-type lithium secondary battery including: a battery unit comprising a positive electrode plate, a separator, and a negative electrode plate, wherein the separator is disposed between the positive and negative electrode plates; electrode tabs extending from each of the positive and negative electrode plates of the battery unit, respectively; a case having a space to accommodate the battery unit and sealing surfaces formed along the periphery of the space, wherein the case is sealed at the sealing surfaces by thermal fusion; and a protection circuit board 600 electrically connected to the electrode tabs. The protection circuit board is disposed parallel to an outer wall of the case. Since the electrode tabs are bent in an upright position with respect to the sealing surfaces, and the protection circuit board electrically connected to the bent electrode tabs is disposed between the outer wall of the case and the electrode tabs, the size of the sealing surfaces of the case can be minimized.

Abstract: A pouch-type lithium secondary battery including a battery unit having a positive electrode plate, a negative electrode plate, and a separator between the positive and negative electrode plates; electrode tabs extending from each of the positive and negative electrode plates of the battery unit, respectively; a case having a space to accommodate the battery unit; a sealing surface along the periphery of the space; and a protection circuit board electrically connected to the electrode tabs, wherein portions of each of the electrode tabs extend outside the case, and are bent in an upright position with respect to a plane of the sealing surface.

Abstract: A lithium polymer battery includes a cathode, an anode and a porous separator disposed between the cathode and the anode. A first polymeric electrolyte is positioned on a first surface of the separator in contact with the cathode. A second polymeric electrolyte is positioned on a second surface of the separator layer in contact with the anode. The first and second polymeric electrolytes use host polymers having different pH levels in an aqueous solution extracted using water.

Abstract: A pouch type secondary battery which can prevent a cut portion from electrically contacting a protective circuit module, thereby preventing an electrical short circuit and acceleration of corrosion of a core material and enhancing safety includes an electrode assembly having a first electrode plate, a second electrode plate, and a separator; a pouch case made of a flexible material, and having a container, insulated at least on its inner surface and accommodating the electrode assembly, and sealing portions along an edge of the container, the sealing portions including a first sealing portion through which electrode taps of the electrode assembly extend from the pouch case, and a second sealing portion and a third sealing portion respectively positioned at opposite sides of the first sealing portion, the second an third sealing portions being folded at least one time; a protective circuit module connected to the electrode taps and mounted on an outer surface of the first sealing portion; and a short circuit p

Abstract: A pouch-type lithium secondary battery including a battery unit having a positive electrode plate, a negative electrode plate, and a separator between the positive and negative electrode plates; electrode tabs extending from each of the positive and negative electrode plates of the battery unit, respectively; a case having a space to accommodate the battery unit; a sealing surface along the periphery of the space; and a protection circuit board electrically connected to the electrode tabs, wherein portions of each of the electrode tabs extend outside the case, and are bent in an upright position with respect to a plane of the sealing surface.

Abstract: A battery unit including an electrode unit including a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate, the separator, and the negative electrode plate are disposed in sequential order; electrode leads extending from each of the positive and negative electrode plates of the electrode unit; and a finishing tape provided on an outermost surface of the electrode unit, including an adhesive layer having a low adhesive strength, and a polymer film layer coated with the adhesive layer, wherein the finishing tape is detachably attached to the electrode unit so as to detach in response to the electrode unit deforming.