Abstract: A lithium ion secondary battery in which at least one step portion is formed on an upper surface of a cap plate, and at least one step portion is formed on a lower or first surface of a battery part opposite to the upper or first surface of the cap plate so that the at least two step portions are complementary. The complementary step portions of the cap plate of the bare cell and the battery part provided at an upper part of the cap plate result in easy coupling of the battery part to the bare cell and stable maintenance of the coupling between the battery part and the bare cell. The coupling structure results in greater ease in performing subsequent manufacturing processes and protects the bare cells coupled to the battery part from dislodging.

Abstract: A closed battery, according to the invention, comprises a substantially flat box-type outer case 60 having electrical conductivity, provided with an opening on one side in the longitudinal direction thereof and other peripheral sides that are closed, a spiral electrode body 21 housed in the outer case, comprising a positive electrode, a negative electrode, and a separator interposed therebetween, an electrode current collector tab 21a larger in thickness than a core body, welded to a cut and raised piece that is cut and raised from an exposed part of the core body of one of the electrodes of the spiral electrode body, and a sealing plate 50 for covering and sealing the opening of the outer case, wherein the outer case is sealed by laser-welding with the electrode current collector tab being clamped between the rim of the opening and the sealing plate when sealing the opening of the outer case.

Abstract: The metal foil of the positive electrode 1a or the negative electrode 1b in the power generating element 1 is connected along the connecting plate portion 2b which is folded, twisted, and provided in a protruding condition from the main portion 2a of the current-collector connector 2; hence the shape of the current-collector connector 2 becomes easy to form, and a battery capable of enhancing current collection efficiency, reliability and workability can be provided.

Abstract: A terminal platform comprising a first terminal block securable to a housing of the battery, a second terminal block configured to electrically connect to a terminal wire of the battery, and an insulating support electrically isolating the second terminal block from the first terminal block.

Abstract: An electrode assembly and a lithium ion secondary battery using the electrode assembly having reduced winding thickness. Active materials are coated on a first region of a negative electrode collector to which a negative electrode conductive tab is welded, and on an adjacent region overlapping the first region. Active materials are also coated on a first region of a positive electrode collector, to which a positive electrode conductive tab is welded, and an adjacent region overlapping the first region. Parts of the electrode assembly corresponding to the conductive tabs do not protrude from the electrode assembly, allowing for easy insertion of the electrode assembly into a can or pouch.

Abstract: A sealed rechargeable battery has an electrode group formed by winding together a positive electrode and a negative electrode via a separator. A plurality of radial slits are provided in a welding section that is formed by an exposed section of a collector of at least one of the positive electrode and the negative electrode exposed at both ends of the electrode group. In the welding section, the exposed section is folded from the winding axis side toward the outer periphery to form a flat welding face.

Abstract: A lithium ion secondary battery and a jelly-roll type electrode assembly in a lithium ion secondary battery including a can and a cap assembly together with the electrode assembly. The electrode assembly is made up of two electrodes; a ceramic separator coating on at least one surface among the four surfaces of the two electrode plates and located between the two opposing electrodes; and porous polymer resin separation films placed between the electrode plates at certain locations where the plates are bent to relatively small radii of curvature and outward from an innermost portion of a core, and/or at terminal ends of the electrode plates, respectively.

Abstract: The present subject matter includes a capacitor stack having a plurality of anode layers, and a plurality of cathodic metal substrates partially coated in a titanium coating. Cathode portions lacking titanium enable weld interconnections which are substantially free of titanium, improving capacitor properties. In some embodiments, anodes are interspersed among cathodes, and are electrically separated from the cathodes, with portions of cathode material attached to the welding area of the anode. These portions of the cathode material are no longer electrically connected to the cathode. As the anode and these cathode portions are welded and aged, leakage current is reduced due to improved oxide growth in the welding area due to the absence of titanium.

Abstract: The present invention provides battery cell having low resistance internal connections and compact, low volume terminal connections in order to maximize power-producing volume. The battery of the present invention may be created using a novel fold geometry to fold electrode tabs into compact, low profile tabs having a low total volume. The battery cell provides a means for equalizing path lengths from each electrode active area to the point of connection to the terminal and also reducing path length, thereby further reducing resistance of the battery. The connection means of the present invention consumes less internal battery space than connection means of prior art electrode stacks. Accordingly, the electrode stack of the present invention disposes more or larger battery cells in the battery than the prior art and thus provides more power than the prior art battery. The present invention is designed to overcome prior art difficulties in preparing a battery.

Abstract: A lid 3 that closes the upper surface of the opening of a closed-bottom prismatic tubular battery can 1, an electrode body 2 accommodated in the battery can 1, a negative terminal 12 penetratively fastened to the lid 3, an insulating plate 11 placed on the lower surface side of the lid 3, a lead plate 17 placed on the lower surface side of the insulating plate 11, and a negative electrode current collector lead 7 led upwardly of the electrode body 2 are included. The upper end portion of the current collector lead 7 is welded to the lower surface of the lead plate 17 and bent in a position located rather closer to the front wall of the battery can 1. The insulating plate 11 has a lid side insulating portion 22 held between the lid 3 and the lead plate 17 and a front sidewall 25 that extends downwardly from the front end side of the lid side insulating portion 22.

Abstract: A connection device for an electric accumulator 10 a first connection subassembly 16 associated with one of the electrodes 12. It comprises a metallic conducting strip 20 provided with several pins that will be embedded in the electrode 12 to make the electrical contact, and temperature and/or electrical protection means housed in a fixed module 25 electrically connected to one of the ends of the strip 20.

Abstract: An electrode assembly having a super-capacitor for allowing high current charge/discharge operations and a lithium secondary battery having the same. The electrode assembly includes first and second electrode plates, a separator interposed between the first and second electrode plates; and a super-capacitor. Each plate has an electrode charge collector, an activation material layer formed on at least one surface of the electrode charge collector, and an electrode tap attached to the electrode charge collector.

Abstract: A battery, in particular a lead-acid rechargeable battery, having at least one battery cell connecting element, which has a connector, which has at least one side surface, for connection to at least one plate on a lower face of the connector, and a welding lug, which is electrically conductively connected to the connector and has a recess which is bounded by a boundary, wherein, in a section which is adjacent to the side surface of the connector, the boundary has a profile which corresponds to a contour of the side surface of the connector.

Abstract: Disclosed herein is a terminal-linking member of a high-output, large-capacity secondary battery module or pack having a plurality of unit cells stacked one on another and electrically connected with each other. The terminal-linking member includes an insulating member mounted between electrode terminals of the neighboring unit cells for accomplishing the electrical insulation between the electrode terminals, the insulating member being coupled to the electrode terminals, and a connecting member coupled to the insulating member for electrically connecting the electrode terminals of the unit cells coupled to the insulating member in series or in parallel with each other.

Abstract: An electrode assembly and a lithium ion secondary battery using the same capable of preventing a short circuit from being created in an outer peripheral portion of the electrode assembly. Uncoated areas of positive and negative electrode plates and an active material layer in the inner and outer peripheral portions of the electrode assembly are optimally aligned such that the thickness of the electrode assembly is uniformly formed widthwise along the electrode assembly.

Abstract: Lead-acid storage batteries of the type having a plurality of cells, each including alternating positive and negative plates, each plate including an upstanding lug, and a partition separating adjacent cells are provided with unique improved lighter weight and lower resistance plate and intercell connectors. The connector comprises at least one cell plate connector including a wall with a multiple spaced slots for receiving the lugs from either the positive or negative plates of the cells. A strap extends from the cell plate connector. The cell plate connector and the strap are formed of a metal substrate that has a lower specific gravity and higher conductivity than lead, the substrate having a lead-based outer coating that resists the corrosive effects of the battery acid. A small amount of lead is then applied covering the slotted wall and at least a portion of each lug to insure good connection.

Abstract: A stacked lithium-ion rechargeable battery comprises a plurality of stacked positive and negative electrode couples forming a battery core, each of said couple having a negative electrode, a positive electrode, a separator, and non-aqueous electrolyte, all encased in a battery case. The core is secured by a clamp case and said clamp case is encased in a battery shell. There are thin neck parts (or conducting tabs) extending from the base plates of the positive and negative electrodes to form the current collectors of the positive and negative electrodes. The positive electrodes and negative electrodes are arranged such that the two current collectors are located on the two opposite ends of the core. The current collector at each end of the core is clamped by a clip and connecting to the respective positive and negative terminals. This stacked lithium-ion rechargeable battery has a relatively low impedance, high discharge rate and high safety performance.

Abstract: A lithium secondary battery includes a can made of a conductive metal. The can houses an electrode unit having positive and negative electrode plates with a separator interposed therebetween with an electrolytic solution. An upper opening of the can is sealed by a cap assembly. A bottom plate is welded to an outer bottom surface of the can, and a lead plate having a first end welded to the outer bottom surface of the can and a second end connected to a safety device so that the can is electrically connected to the safety device.

Abstract: The present invention relates to a rechargeable battery having a plurality of cells each having a plurality of positive and negative electrode plates, the positive and negative electrode plates electrically isolated from one another by separators and having output lugs arranged alternately alongside one another. The rechargeable battery also includes a first output lug bundle comprising the output lugs of the positive electrode plates of a first cell electrically connected together and a second output lug bundle comprising the output lugs of the negative electrode plates of the first cell electrically connected together. The first output lug bundle and the second output lug bundle each comprise a recess for holding a pole output conductor, the pole output conductor having a clamping shoe with two clamping plates which can be moved relative to one another by means of a clamping screw in which case the clamping screw can be inserted into the recess in the output lug bundle.

Abstract: A prismatic battery with highly reliable sealing properties and its manufacturing method, wherein a negative collector is welded to one end of an electrode plate group accommodated in a prismatic case, the collector being connected to an electrode pole that functions as the negative electrode terminal, and the electrode pole is fitted into a support cylinder that is provided on an upper lid for closing one open end of the case. An insulating gasket is interposed between an inner periphery of the support cylinder and an outer periphery of the electrode pole, the support cylinder being formed with at least one annular crimped portion that has an arc-shaped longitudinal cross section.

Abstract: A valve-regulated lead acid (VRLA) battery cell (2,40) has positive and negative plates (10,11,41,42) separated by separator media (12,43) and held together under pressure. The separator is adapted to support therein an electrolyte. Each plate has a first single or plurality of tabs (12,13,46) on a first side and a second single or plurality of tabs (15,16,47) on a second side of the plate, each tab being connected to a busbar (17,18,49,50) to form positive and negative busbars on each of the first and second sides of the plate. The cell may be alternatively configured in a spirally-wound arrangement or in a prismatic arrangement of flat plates. The cell may be constructed of a plurality of such positive and negative plates. A VLRA battery (1, 40) may be constructed of one or a plurality of such VLRA cells, in which case the busbars of neighboring cells are connected by welded joints. The busbars are serviced by at least plural pairs of positive and negative terminals (24,25,33,34,52,53,54,55).

Abstract: A lead acid battery of the present invention has: an electrode plate pack including a plurality of negative electrode plates which each comprise a negative electrode grid having a tab and a negative electrode active material layer retained by the negative electrode grid, a plurality of positive electrode plates which each comprise a positive electrode grid having a tab and a positive electrode active material layer retained by the positive electrode grid, and a plurality of separators separating the positive and negative electrode plates; a positive electrode connecting member connected to each positive electrode plate of the electrode plate pack; and a negative electrode connecting member connected to each negative electrode plate of the electrode plate pack. The positive electrode grid has a lead alloy layer including 0.01 to 0.

Abstract: One embodiment of an electrochemical cell for an implantable medical device is presented. The electrochemical cell includes a first electrode. The first electrode includes at least one current collector with a tab extending therefrom. The at least one tab comprises one of vanadium and vanadium alloy.

Abstract: An electrode group 4 having a positive electrode plate and a negative electrode plate arranged with a porous insulating layer interposed therebetween and end portions of the positive and negative electrode plates protruding from the porous insulating layer is prepared, and current collector plates 10 and 11 each of which is provided with a projection 12 having a gap 12a formed therein is prepared. With the end portion 2a of the electrode plate protruding from the porous insulating layer 3 kept in contact with a principle surface of the current collector plates 10 and 11, the projection 12 is locally heated to join the end portion 2a of the electrode plate and the current collector plates 10 and 11. the end portion 2a of the electrode plate is welded to the current collector plates 10 and 11 with a fused material obtained by fusing the projection 12.

Abstract: A sheet-shaped energy device includes at least sheet-shaped battery cells, in each of which a positive collector, a negative collector, a positive active material, and an electrolyte are laminated, and a plurality of substrates in a thickness direction. An internal wiring pattern and/or an optical function part are formed on at least one substrate excluding a substrate constituting an outermost layer of the energy device among the plurality of substrates. Because of this, a constraint on the arrangement of various kinds of components used simultaneously with the sheet-shaped energy device and lengthy wiring can be reduced in electronic equipment.

Abstract: An electrode in an electrochemical cell for an implantable medical device is presented. The electrode includes a plurality of electrode plates. Each electrode plate includes a tab extending therefrom. The tab is shaped in a H-shape, a T-shape, a Y-shape, and a L-shape.

Abstract: A stack type battery has positive electrode current collector tabs (11) overlapped with each other and welded to a positive electrode current collector terminal (15), and negative electrode current collector tabs (12) overlapped with each other and welded to a negative electrode current collector terminal (16). The positive electrode current collector tabs (11) existing between the positive electrode plates (1) and an end part (15a) of the positive electrode current collector terminal (15) that is on the positive electrode plate (1) side are welded to each other and/or the negative electrode current collector tabs (12) existing between the negative electrode plates (2) and an end part (16a) of the negative electrode current collector terminal (16) that is on a negative electrode plate (2) side are welded to each other.

Abstract: A storage cell includes a storage element, a first case having a first flat portion contacting an upper surface of the storage element and having a rectangular shape, a second case having a second flat portion contacting a lower surface of the storage element and having a rectangular shape, a gasket allowing the storage element to be accommodated between the first case and the second case, first and second terminal plates joined to the first and second cases, respectively, a first sealing resin for sealing the first case and the gasket, a second sealing resin for sealing the second case and the gasket, and a package resin covering the above components. The gasket has a rectangular frame shape, and has a cross section having substantially an H-shape. Edges of the first and second cases are inserted in recesses in the gasket and sealed with the first and second sealing resins, respectively. This storage cell has a high withstanding temperature and reduces an area having the cell mounted thereto.

Abstract: A method of controlling an elevator system comprises transferring power to an elevator car from a primary power supply to a backup power supply without interruption of power if the primary power supply fails or is disrupted. Following transfer of power to the elevator car from the primary power supply to the backup power supply either pending operations of the elevator car are completed or the elevator car is moved to a predetermined floor based on pending operations of the elevator car. The backup power supply can be attached to the elevator car.

Abstract: The invention provides an EC bundle having a plurality of cells. In turn, each cell respectively comprises: a pair of sheet-like electrodes; electrolyte interposed between the electrodes; and a sheet like current collecting element. The sheet-like current collecting element, which includes a pair of generally opposite main faces, projects from at least one of the sheet-like electrodes and is electrically connected thereto. Moreover, the plurality of cells are arranged into a stack such that their respective sheet-like current collecting elements are in a side-by-side relationship with their main faces generally facing one another. The EC bundle further comprises a current collecting terminal featuring a pair of arms in a spaced apart relationship which define a recess which receives the sheet-like current collecting elements and which establishes an electrical connection with them.

Abstract: A secondary battery including a can for receiving an electrolyte and an electrode assembly including first and second electrode plates and a cap assembly including a cap plate covering an upper portion of the can. An electrode terminal connected to one of the first and second electrode plates is inserted into a center portion of the cap plate. A safety vent is formed at a first side of the cap plate and an electrode lead wire is connected to an upper surface of the electrode terminal to connect the electrode terminal to an external terminal. A washer is installed on an upper surface of the cap assembly in order to insulate the cap plate from the electrode lead wire and has an exposure part for exposing the safety part allowing the location of the safety vent to be noted without disassembly of the secondary battery.

Abstract: An electrode assembly comprises a positive electrode plate having a positive electrode collector and a positive electrode coating portion formed one the positive electrode collector, a negative electrode plate having a negative electrode collector and a negative electrode coating portion formed on the negative electrode collector; and a separator. Either the positive electrode coating portion or the negative electrode coating portion is divided into a coating-starting portion, a coating-finishing portion and a uniform region between the coating-starting portion and the coating-finishing portion.

Abstract: The invention concerns a battery module comprising at least one element consisting of stacked layers, some layers having edges extending beyond the edges of other layers, thus forming projecting parts, and a tightening member maintaining the projecting parts of the layers tightly close together. The invention is characterized in that the tightening member is a self-contained elastic member which by itself, without external aid, provides for the tightening of said projecting parts and its own grip thereon, and is adapted to provide an electrical connection of said layers to a circuit.

Abstract: A rechargeable battery includes a cover and at least one connecting pole comprising a pole shank inserted into a pole sleeve having an inner casing. The connecting pole is closed from the outside of the rechargeable battery such that it is liquid-tight and gas-tight. The pole sleeve is electrically conductively connected to the pole shank and is held in a liquid-tight and gas-tight manner by the cover. A first section of the pole shank is electrically conductively connected in a gas-tight and liquid-tight manner to the inner casing of the pole sleeve. A sliding element is provided between a second section of the pole shank and the inner casing of the pole sleeve.

Abstract: A lead storage battery of the present invention has: an electrode plate pack including a plurality of negative electrode plates which each comprise a negative electrode grid having a tab and a negative electrode active material layer retained by the negative electrode grid, a plurality of positive electrode plates which each comprise a positive electrode grid having a tab and a positive electrode active material layer retained by the positive electrode grid, and a plurality of separators separating the positive and negative electrode plates; a positive electrode connecting member connected to each positive electrode plate of the electrode plate pack; and a negative electrode connecting member connected to each negative electrode plate of the electrode plate pack. The negative electrode active material layer includes 0.0001 to 0.003 wt % of Sb, and includes 0.01 to 2 wt % of a condensate of bisphenol and aminobenzene sulfonic acid derivative.

Abstract: An electrochemical device comprising an electrolyte and at least one electrode plate, the electrochemical device having a metal part constituting the electrode plate or being connected to the electrode plate; the electrolyte comprising a solute and a solvent dissolving the solute; the metal part having an insulating oxide layer for preventing the electrolyte from creeping on at least part of the surface of the metal part.

Abstract: A battery device comprises a first lead board having one surface and the other surface, a second lead board having one surface and the other surface, the one surface of the second lead board facing the one surface of the first lead board through a spacing, a first terminal electrode formed on the one surface of the first lead board, a second terminal electrode formed on the one surface of the second lead board, and a solid electrolyte of conducting a lithium ion provided in the spacing between the one surface of the first lead board and the one surface of the second lead board so as to cover at least one of the first terminal electrode and the second terminal electrode. Such a battery device can eliminate occurrence of short-circuit between the cathode and the anode, which likely to occur during the production of an all-solid secondary battery. Further, an all-solid lithium-ion secondary battery provided with the battery device is also provided.

Abstract: Electrochemical battery cells with strip-like electrodes and having a pressure contact between a lead from one of the electrodes and a side wall of the cell container. An electrochemical cell having a spiral wound electrode assembly having an internal lead in direct pressure contact with a lithium foil negative electrode free of a separate current collector and in contact with an inner portion of the cell container, wherein specified contact between the lead and lithium foil provides current flow between the container and foil.

Abstract: A battery includes a battery enclosure (3), a power-generating unit (50) accommodated in the battery enclosure (3), positive and negative terminal electrodes (1, 2). The battery enclosure (3) is composed of a laminate film compounded of metal and a polymer material, and has a rectangular shape. The power-generating unit (50) includes positive electrode collectors (5), negative electrode collectors (7) and separators (8). The positive and negative terminal electrodes (1, 2) have dimensions substantially equal to those of the positive and negative electrode collectors (5, 7), respectively. Further, the positive and negative terminal electrodes (1, 2) protrude from mutually different sides of the battery enclosure (3). The positive terminal electrode (1) is formed by protruding the positive electrode collectors (5) from the battery enclosure (3) in a state where end portions of the positive electrode collectors (5) are mutually stacked.

Abstract: A battery of the present invention has a strip-shaped electrode group. The electrode group includes a first electrode, a second electrode, and a separator interposed therebetween. The first electrode has a strip-shaped first current collector and a first active material layer carried on one surface thereof. The first active material layer faces the separator. The second electrode has a strip-shaped second current collector and a second active material layer carried on one surface thereof. The second active material layer faces the separator. The electrode group is folded in a zigzag pattern to form a laminate having a plurality of flat portions, at least one first bent portion located on a first end side of the plurality of flat portions in which the first current collector is located on the outermost side, and at least one second bent portion located on a second end side that is opposite to the first end side in which the second current collector is located on the outermost side.

Abstract: An electric storage battery and method of manufacture thereof characterized by a feed through pin (12) which is internally directly physically and electrically connected to an inner end of a positive electrode substrate (32). A C-shaped mandrel (48) extends around the pin and substrate end enabling the pin/mandrel to be used during the manufacturing process as an arbor to facilitate winding layers of a spiral jellyroll electrode assembly. The pin additionally extends from the battery case (101) and in the final product constitutes one of the battery terminals (14) with the battery case comprising the other terminal. The electrolyte is injected through the open end of the case after the end cap is welded to the negative electrode but before sealing the end cap to the case. The electrolyte is preferably injected through the C-shaped mandrel to facilitate and speed filling.

Abstract: A rechargeable battery comprises an electrode assembly including a positive electrode, a negative electrode, and a separator interposed therebetween. The battery further comprises a case for housing the electrode assembly, a cap assembly coupled with the case, and a collecting plate having a first fixing portion coupled with the positive electrode or the negative electrode and a second fixing portion coupled with the case. A buffer portion is provided between the first fixing portion and the second fixing portion to alleviate forces exerted on the collecting plate.

Abstract: Provided are a low-cost battery in which an outermost first electrode plate is designed to be bent at a bent portion farther from a current collector than its own joint end so that a near portion extending from the bent portion to the joint end is positioned inward in a lamination direction than a distant portion positioned farther from the current collector than the bent portion, and first electrode plates including the outermost first electrode plate are connected to a collector joint part, and a manufacturing method thereof. In the battery of the invention, a negative collector joint part is connected to a negative joint end of an inside negative electrode plate with a fillet formed of metal melted from the negative collector joint part itself and also connected to a negative joint end of an outermost negative electrode plate with a fillet formed of metal melted from the negative collector joint part itself.

Abstract: A low pressure current interrupt device (CID) activates at a minimal threshold internal gauge pressure in a range of, for example, between about 4 kg/cm2 and about 9 kg/cm2. Preferably, the CID includes a first conductive plate and a second conductive plate in electrical communication with the first conductive plate, the electrical communication between the first and the second conductive plates being interrupted at the minimal threshold internal gauge pressure. More preferably, the first conductive plate includes a frustum having a first end and a second end, a base extending radially from a perimeter of the first end of the frustum, and an essentially planar cap sealing the second end of the frustum. The first end has a broader diameter than the second end. More preferably, the second conductive plate is in electrical contact with the essentially planar cap through a weld. A battery, preferably a lithium-ion battery, comprises a CID as described above.

Abstract: A method of manufacturing a battery includes providing a cell for a battery having alternating positive and negative electrode plates, each of the electrode plates being separated by an electrically insulative separator layer. Each of the positive and negative electrode plates includes a projecting tab extending from an adjacent upper portion thereof, the projecting tabs of the positive plates being generally aligned, and the projecting tabs of the negative plates being generally aligned. The method comprises attaching a conductive connecting strap to the projecting tabs The method comprises applying a cap material onto the connecting positive strap and allowing the cap material to spread and drip to the exposed portions of the projecting tabs and the adjacent upper portions of the negative and positive plates and separator material. The cap material hardens to provide a cap.

Abstract: The invention provides a battery module including an output breaker that ensures safe and prompt installation of batteries in a system. The battery module includes one or more batteries and a case housing the batteries and having output terminals, each output terminal being connected to a positive or negative electrode of the housed battery, the battery module further including means for turning on and off the connection between the output terminal and the positive or negative electrode of the battery. The means for turning on and off the connection may include a contact subjected to making and breaking operations and a screw for making and breaking the contact, the screw having an insulator at an interface with the contact.

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 jelly-roll type electrode assembly, a lithium secondary battery having the same, and a method for manufacturing the same are provided. The electrode assembly comprises a deformation prevention core which simplifies the manufacture of a lithium secondary battery and prevents deformation of the electrode assembly. The electrode assembly comprises positive and negative electrode plates and a separator wound around a deformation prevention core. A positive electrode active material is coated on the positive electrode plate and a negative electrode active material is coated on the negative electrode plate. The separator insulates the positive electrode plate from the negative electrode plate. The deformation prevention core is located near the center of the electrode assembly.

Abstract: A battery conductive plate includes at least two welding point zones and at least one connecting zone for electrically connecting the welding point zones to one another. The battery conductive plate is characterized in at least one narrow opening that divides the battery conductive plate into a plurality of separated and electrically non-contact conductive plate parts, so that the battery conductive plate may be more firmly welded to the battery terminals using a stick welding machine.

Abstract: The prevention of lithium clusters from bridging between the negative and positive portions of a cell during discharge is described. This is done by limiting the amount of electrolyte in the cell, thereby eliminating excess electrolyte pooling above the cell stack. It is in this excess electrolyte that a relatively higher Li+ ion concentration can occur, creating an anodically polarized region resulting in the reduction of lithium ions on the negative and positive surfaces as the concentration gradient is relaxed. Typically, a lithium ion concentration gradient sufficient to cause lithium cluster formation is induced by the high rate, intermittent discharge of a lithium/silver vanadium oxide (Li/SVO) cell.