Abstract: The present invention relates to a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. More particularly, the present invention relates to a positive active material for a rechargeable lithium battery including a compound that can reversibly intercalate/deintercalate lithium and a lithium metal phosphate produced through binding with lithium of the compound, the lithium metal phosphate existing from the surface of the compound to a predetermined depth, a method of preparing the positive active material, and a rechargeable lithium battery having the positive active material. The positive active material can accomplish excellent cycle-life characteristic and also, suppress battery swelling at a high temperature.

Abstract: A lithium (Li) polymer battery is provided. The Li polymer battery includes: a positive plate including a positive collector having a plurality of openings and a positive active material layer on at least one surface of the positive collector; a negative plate including a negative collector in a foil form, and a negative active material layer on at least on surface of the negative collector; and a separator between the positive and negative plates, for insulating the positive and negative plates.

Abstract: A pouch type secondary battery having enhanced reliability by protecting the battery from external impacts is described. A reinforcement structure may be installed on a pouch casing and an electrode assembly housed in the pouch casing. Short-circuits inside the pouch casing may be minimized. The pouch type secondary battery has an electrode assembly with positive and negative electrode plates with a separator interposed therebetween, and positive and negative terminal portions extending from the positive and negative electrode plates. A first reinforcement member is closely adhered to one or more planes of the electrode assembly. A second reinforcement member may be adhered to the pouch casing and used with or without the first reinforcement member.

Abstract: A battery has enhanced reliability by protecting the battery from external impacts by separately installing a reinforcement structure on a casing and an electrode assembly housed in the casing. The configuration reduces or minimizes volumetric change in the dimensions due to volumetric expansion of the electrode assembly. The battery may include an electrode assembly having first and second electrode plates with a separator interposed therebetween. First and second terminal portions extending from the first and second electrode plates and a pouch casing having an open portion and for housing the electrode assembly. A pouch cover coupled and sealed with an opening of the pouch casing. The pouch cover having at least one throughhole and at least one electrode pin fastened to the throughhole. The electrode pin is electrically connected to one of the first and second terminal portions of the electrode assembly.

Abstract: A lithium (Li) polymer battery is provided. The Li polymer battery includes: a positive plate including a positive collector having a plurality of openings and a positive active material layer formed on at least one surface of the positive collector; a negative plate including a negative collector in a foil form, and a negative active material layer formed on at least on surface of the negative collector; and a separator between the positive and negative plates, for insulating the positive and negative plates.

Abstract: A lithium polymer battery having a positive electrode including a positive electrode current collector and positive electrode sheets on at least one surface of the positive electrode current collector, the positive electrode sheets having a positive electrode active material layer as a main component, a negative electrode including a negative electrode current collector and negative electrode sheets on at least one surface of the negative electrode current collector, the negative electrode sheets having a negative electrode active material layer as a main component, and a separator interposed between the positive electrode and the negative electrode, for insulating the electrodes from each other. The positive electrode and the negative electrode of the lithium polymer battery each include a plate and are wound with the separator interposed therebetween.

Abstract: A case for a secondary battery. The case for a secondary battery has a space in which an assembled battery unit including a positive electrode plate, a separator, and a negative electrode plate, is accommodated, and sealing portions welded along the periphery of the space, wherein at least one notch is present in the sealing portions.

Abstract: A collector, an electrode and a secondary battery adopting the same. The secondary battery includes: an electrode assembly having electrodes obtained by attaching an active material sheet to at least one side of a flat collector with a plurality of through holes formed in a predetermined pattern, and a separator interposed between the electrodes; a case for sealing the electrode assembly; and tabs connected to terminals of the electrode assembly and extended outwards the case, wherein the through holes have a regular polygonal shape and the rib widths among the through holes are equal.

Abstract: A polymer lithium ion battery has an aluminum foil case, both surface of which are coated with a thin layer of an insulating polymer and portions of the polymer on the periphery of the case are removed so that the exposed regions can function as battery terminals. Portions of the polymer on the inner surface of the case are removed so that electrode sheets can be electrically connected to the battery terminals.

Abstract: A method for manufacturing a lithium polymer secondary battery includes the steps of fabricating a unit cathode plate, a unit anode plate and a separator each having a plasticizer, extracting each plasticizer from the unit cathode plate, the unit anode plate and the separator and drying the same, stacking the cathode plate and the unit anode plate and interposing the separator therebetween to form a unit battery cell, and impregnating the unit battery cell with an electrolytic solution. Therefore, the battery productivity can be improved. Also, expanded metal or punched metal as well as a foil can be used as cathode and anode current collectors of the lithium polymer secondary battery.

Abstract: A secondary battery includes positive electrode plates with tabs at one end, bundled together, negative electrode plates with tabs at one end, bundled together, a separator between each positive electrode and each negative electrode, a protective circuit controlling charging/discharging of the battery, and a pair of electrical leads, each lead including two layers of different materials such that one layer is connected to one of the tabs and the other layer is connected to the protective circuit.