Abstract: Disclosed is a battery pack, which includes at least one battery module and electric parts electrically connected to the at least one battery module, a tray configured to support the at least one battery module and the electric parts at an upper surface thereof, and a pack cover having a rim that faces a rim of the tray, the pack cover being coupled to the tray to cover the battery module and the electric parts, wherein the tray includes a tray stopper provided at the rim of the tray and bent upwards to support the rim of the pack cover from an outer side toward an inner side.

Abstract: A flat-shaped battery of the present invention includes an outer can that is open upward, a sealing can that is open downward, and a gasket that is placed between the outer can and the sealing can to seal the space between them. The outer can includes a base plate and a cylindrical surrounding wall. The surrounding wall of the outer can includes a straight portion that extends upward and perpendicular to the base plate. The sealing can includes a housing in the form of an inverted dish, a flange that projects outward from a lower end of the opening of the housing, and a single outer surrounding wall that extends downward from an outside edge of the flange so as to be perpendicular to the flange. The outer surrounding wall of the sealing can is arranged perpendicular to the base plate of the outer can.

Abstract: A battery sealing member: has a power generating element, a case body member, a case lid member, and an electrode terminal member having an insert-through part inserted in a through-hole provided in the case lid member. The electrode terminal member is electrically connected to the power generating element. The battery sealing member is made of a synthetic resin and has a sealing part held between the electrode terminal member and the inner surface of the case lid member. The crystallinity of the sealing part of the sealing member is higher than the crystallinity of a portion other than the seal section.

Abstract: An electrochemical cell includes a cell element and a current collector disposed in a housing that includes a vent. The current collector includes an outer member and an inner member coupled together by one or more flexible arms. The outer member is coupled to the cell element and the inner member is coupled to the vent, such that the flexible arms allow axial movement of the inner member with respect to the outer member when the vent moves from an undeployed position to a deployed position. The housing may include a shoulder that holds the cell element in the housing. The electrochemical cell may also include a coil plate provided at an end of the cell element. The coil plate is coupled to an edge of at least one electrode of the cell element.

Abstract: Provided is a gasket for an electrochemical cell, which has good sealing performance and is capable of improving productivity of the gasket, and an electrochemical cell. A gasket (4) for an electrochemical cell, which is made of a resin and has an annular shape including an outer wall and an inner wall, includes a plurality of annular salient portions (4a) formed on an inner side surface of the outer wall.

Abstract: A secondary battery that can easily adjust power by disposing a plurality of jelly-rolls for the secondary battery in a case and connecting electrodes of the jelly-rolls in either electrical series or in electrical parallel, with corresponding welds. The secondary battery is constructed with a plurality of jelly-rolls each having a first electrode tab and a second electrode tab protruding from the jelly-roll, a case having an opening accommodating insertion of the jelly-rolls, and a cap plate sealing the opening of the case and bearing electrode terminals on a bottom side of the cap plate facing the jelly-rolls. The first electrode tabs protruding from the jelly-rolls are electrically connected to the electrode terminals and the second electrode tabs protruding from the jelly-rolls are electrically connected to the cap plate.

Abstract: Disclosed is a secondary battery. The secondary battery includes an electrode assembly including a first plate, a second plate, and a separator disposed between the first and second plates, a battery case accommodating the electrode assembly and an electrolyte, a cap assembly sealing an opening formed on one side of the battery case, and a gasket disposed between the cap assembly and the battery case. The battery case includes a crimping part formed on an upper portion of the battery case, and the crimping part is disposed on the gasket. A ratio of a second thickness of the gasket to a first thickness of the gasket is greater than 1.8 and is less than 4.8. The first thickness is a length between an internal surface of the battery case and an outermost edge of the cap assembly, and the second thickness is a length between the internal surface of the battery case and an outermost tip of the crimping part.

Abstract: According to an embodiment, a battery includes a cap plate, the cap plate having an opening penetrating therethrough and having at least a first protrusion extending from a first side, an electrode terminal extending through the opening in the cap plate, a collector extending from the electrode terminal, and a gasket interposed between a portion of the electrode terminal and the first side of the cap plate, the first protrusion extending through the gasket and the collector.

Abstract: A rechargeable battery comprises an electrode assembly comprising an anode, a cathode, and a separator, a case for receiving the electrode assembly, and an electrode terminal electrically connected to the electrode assembly and drawn outside the case. The anode and the cathode each comprises an electrode uncoated region exposed past the separator and including a current collector at an edge. The electrode terminal comprises a terminal plate having a first terminal portion adhered to a bottom surface of the current collector and a second terminal portion drawn outside the case, and a combiner installed on the terminal plate to surround and adhere to a side surface and a top surface of the current collector.

Abstract: A battery case comprises a tray member (20), a cover member (22), a first holding member (24) of a metal arranged to contact a tray flange (32) with its outer circumferential edge portion projecting outward from the tray flange by a predetermined length, a second holding member (26) of a metal arranged to contact a cover flange (36) with its outer circumferential edge portion projecting outward from the cover flange by a predetermined length, and a fastening means (28, 29) fastening the first and second holding members together at a predetermined location outwardly away from the tray and cover flanges.

Abstract: A battery is provided with a base portion provided on the base end side of a columnar rivet portion. A terminal rivet is formed, on that surface of the base portion on which the rivet portion is located, with a sloped seat surface having a height which increases as one moves closer to the rivet section and provided at the entire circumference around the rivet section. The battery is also provided with an annular elastic member and a hard member having higher hardness than the elastic member and provided with a first hole having a diameter greater than the outer diameter of the elastic member and smaller than the outer diameter of the sloped seat surface. The terminal rivet is mounted such that the base portion and a current collecting part are located inside a battery case and such that the rivet portion penetrates through a hole in the battery case to project outward.

Abstract: A modular battery includes: a first battery cell having a first electrode surface; a second battery cell having a second electrode surface; a compressible interconnector connecting the first battery cell and the second battery cell; and a polymeric material holding the first battery cell against the second battery cell with the interconnector in a compressed state. A method is also provided.

Abstract: A battery may have a foil battery pack with leads that are coupled to a printed circuit board. Battery protection structures formed from an insulating material such as plastic may be used to protect the foil battery pack. The foil battery pack may have a rectangular shape with front and rear faces surrounded by a rectangular peripheral edge. The battery protection structures may have a ring shape that surrounds the peripheral edge while leaving the front and rear faces exposed to minimize the size of the battery protection structures. An elastomeric material may be used to form the battery protection structures. The elastomeric material may allow the battery protection structures to stretch when the battery pack expands during use. Two shots of plastic may be incorporated into the battery protection structures to provide both puncture resistance and the ability to stretch during use.

Abstract: An electricity storage device includes: a plurality of cells that are aligned in a predetermined direction; a pair of end plates that sandwich the plurality of cells in the predetermined direction; and a restraining member that extends in the predetermined direction, is fixed to the pair of end plates, and exerts a restraining force on the plurality of cells in the predetermined direction via the end plates. Each of the end plates includes a first plate and a second plate. The first plate has a plurality of ribs on a surface that faces the adjacent cell and is formed of insulating material. The second plate is fixed to the first plate on a side opposite to the surface that faces the adjacent cell and is formed of material stronger than the insulating material for the first plate.

Abstract: Disclosed herein is a battery cartridge having a plate-shaped battery cell mounted therein, wherein the battery cartridge includes a pair of plate-shaped frames configured to fix opposite sides of the battery cell at the edge thereof in a state in which the sides of the battery cell are open, and each of the frames is provided at the inside thereof, disposed in contact with the edge of the battery cell, with an elastic pressing member configured to press the edge of the battery cell.

Abstract: A lithium ion battery pack battery pack is disclosed. The battery pack comprises a housing, the housing having a sidewall and a sidewall opening extending there through, a plurality of lithium ion battery cells disposed within the housing, the battery cells having an anode terminal and a cathode terminal, first and second current collectors disposed in the housing, the first and second current collectors electrically engaging respective ones of the anode and the cathode terminals, a metal plate disposed in the sidewall opening adjacent one of the current collectors, and an electrically non-conductive barrier disposed between the adjacent one of the current collectors and the metal plate, wherein the metal plate draws heat from the adjacent one of the current collectors outwardly into the ambient environment.

Abstract: A cylindrical battery gasket that will not functionally deteriorate in absorbing stress caused by the gasket extending radially upon the battery being sealed is provided with a boss part with a central hole through which a negative electrode collector is inserted, a canister contact part that is affixed in place and in contact with a cathode canister, a disk-shaped part that is provided to connect the boss part to the canister contact part, and a stress buffering part that is provided on the way to the disk-shaped pat. The stress buffering part has a first bent part and a second bent part, both of an acute angle, and is set nearer the center of the cathode canister than to the positive electrode mixture, upon the gasket being installed in the cathode canister.

Abstract: A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly including a positive electrode, a negative electrode, a separator disposed between the positive and negative electrodes and having an expanded portion protruding to the outside of the positive and negative electrodes; a fixing member including a first support contacting a first outer side of the expanded portion, a second support contacting a second outer side, facing the opposite direction of the first outer side, and a joining portion joining the first and second supports; and a terminal electrically connected with the electrode assembly.

Abstract: A secondary battery includes an electrode assembly formed by winding two different electrodes and a separator interposed therebetween, a can housing the electrode assembly, a cap assembly at a upper opening of the can; and a gasket interposed between the cap assembly and the can. The gasket has a relaxed condition prior to compression between the cap assembly and an upper portion of the can and a compressed condition after compression between the cap assembly and the upper portion of the can. The gasket includes a sidewall portion bent inwardly from outside of the can when the gasket is in the compressed condition, a bottom portion at a bottom of the sidewall portion and extending inwardly from a periphery of the can, a protruding portion on which the cap assembly is seated, and a concave portion formed between the protruding portion and an inner surface of the sidewall portion.

Abstract: A battery module includes a plurality of battery cells stacked together; first and second end plates located at a first end and a second end, respectively, of the stacked battery cells; and side plates and a bottom plate coupled to the first and second end plates, wherein at least one of the first end plate and the second end plate has a bent support portion that overlaps with at least a portion of the bottom plate.

Abstract: The plant (1) with high-temperature fuel cells (7) includes a clamping device for a cell stack (5) and axially aligned chambers (7) for an after-burning. Clamping bars (60) of the clamping device are disposed between the afterburning chambers. Exhaust gas passages connect the after-burning chambers to a heat exchanger (20a) acting as a heat sink. A clamping element (62) of the clamping device is in heat conducting connection with the heat exchanger. Compression springs (63) are respectively mounted on the clamping bars between an end of the clamping bar and a lug (622) of the clamping element. In this arrangement they exert a clamping force onto the clamping bars. The compression springs are shielded by the clamping element from the cell stack so that, thanks to the heat sink, the compression springs are only exposed to moderate temperature at which the clamping force is maintained.

Abstract: Disclosed herein is a battery module including a charge and discharge stack, constituted by a plurality of secondary battery cells that can be charged and discharged or a plurality of unit modules having the secondary battery cells, mounted between an upper module case and a lower module case, wherein the lower module case is provided with joint structures including coupling parts (upper and lower coupling parts) for allowing both upward and downward couplings, and the upper module case is provided with joint holes communicating with the upper coupling parts of the joint structures. The battery module according to the present invention has the effect of reinforcing the low mechanical strength of the battery cells while the weight and size of the battery module is minimized.

Abstract: The present invention relates to a battery stack arrangement (50) comprising at least one bipolar battery. Each bipolar battery comprises a plurality of battery cell arranged between endplates (22,23). Each battery cell is provided with a seal (24) arranged around the entire periphery of each cell, and a sealing pressure Fseal is applied over the seal to prevent electrolyte leakage between adjacent cells. The battery stack arrangement further comprises a mounting frame (57) including: at least two mounting units (58,59) and at least one tie unit (60, 60?, 60?) holding said mounting units together. The bipolar battery is arranged between the mounting units (58,59), and the battery stack arrangement further comprises at least one spacing element (61) arranged between the mounting units (58,59) and each spacing element (61) abuts against at least one endplate (22,23) and is held in place by said mounting frame (57) to create a stack pressure Fstack, independent of the sealing pressure Fseal.

Abstract: A housing comprises a first housing part, having a first bearing surface for a first contact surface of a sealing ring, and a second housing part, which can be screwed together with the first housing part and has a second bearing surface for a second contact surface of the sealing ring. The first contact surface of the sealing ring is produced from a first material having a first coefficient of friction in relation to the material of the first bearing surface, the second contact surface of the sealing ring is produced from a second material that has a second coefficient of friction in relation to the material of the second bearing surface, and the first coefficient of friction is smaller than the second coefficient of friction.

Abstract: A parallel connection assembly of batteries and a battery set having the same are provided. The parallel connection assembly connects battery units to form a battery set, and it includes electrical-conductive connecting pieces, two flexible metallic woven bands and electrical-conductive fixing elements. Each battery unit has a positive electrode hole and a negative electrode hole. Each electrical-conductive connecting piece has a through-hole and a fixing portion. Each electrical-conductive fixing element passes through the through-hole to be fixed in the positive electrode hole or the negative electrode hole. The two flexible metallic woven bands serially connect the fixing portions of the electrical-conductive connecting pieces located on the positive electrode holes and the negative electrode holes respectively, thereby electrically connecting the battery units in parallel.

Abstract: One embodiment provides an electronic device (for example, a ruggedized laptop computer) which includes a housing, a battery compartment, and a battery cover. The cover can have a thickness sufficient to protect the battery from damage. The cover can include a body, a conductive heat transfer device (for instance a conductive pad), and a convective heat transfer device (for instance, a plurality of fins). The conductive device can be on the inside of the cover and can abut the battery. Together, the conductive heat transfer device, the body of the battery cover, and the convective heat transfer device can form a heat transfer path from the battery to the environment which has a low overall heat transfer coefficient. The convective device can be a plurality of fins recessed into the exterior of the cover. A gusset can be on the interior of the cover and can correspond with the recess.

Abstract: Provided is a gasket for an electrochemical cell, which has good sealing performance and is capable of improving productivity of the gasket, and an electrochemical cell. A gasket (4) for an electrochemical cell, which is made of a resin and has an annular shape including an outer wall and an inner wall, includes a plurality of annular salient portions (4a) formed on an inner side surface of the outer wall.

Abstract: An electrode group is constructed by disposing a positive electrode current collector exposed portion on one end side and a negative electrode current collector exposed portion on the other end side. A positive electrode current collector terminal plate and a negative electrode current collector terminal plate are connected to the positive and negative electrode current collector exposed portions, respectively. A conductive coned disc spring is disposed compressed between the positive electrode current collector terminal plate and a sealing plate. The coned disc spring has a dead zone in which the elastic force does not change according to the amount of deformation, and urges the negative electrode current collector terminal plate toward a bottom portion of a battery case with a defined elastic force.

Abstract: Disclosed herein are a stacking type electrode assembly constructed in a cathode/separator/anode structure, wherein the electrode assembly is provided at a predetermined region thereof with at least one through-hole, and a pair of holding members (a male coupling member and a female coupling member) constructed in a male-female coupling type structure is inserted through the through-hole inside a battery case, an outer surface of the female coupling member being brought into tight contact with the through-hole when the male coupling member is inserted into the female coupling member while the female coupling member having an outer diameter less than an inner diameter of the through-hole is inserted through the through-hole, and a secondary battery including the same.

Abstract: The present invention relates to and provides a fuel cell in which sealing can be reliably made for each unit cell, thereby, enabling thinning, facilitating maintenance, and enabling miniaturization and weight reduction, and enabling free shape design. A fuel cell of the present invention is characterized by comprising a sheet-like solid polymer electrolyte 1 and a pair of electrode plates 2, 3 arranged on both sides of the solid polymer electrolyte 1, and further comprising a pair of metallic plates 4, 5 arranged on both sides of the electrode plates 2, 3, and provided flow path grooves 9, and inlets 4c, 5c and outlets communicating with the flow path grooves, wherein the peripheral edges of the metallic plates 4, 5 are mechanically sealed with an insulation material 6 interposed between the metallic plates.

Abstract: A battery is provided with a battery stack body including a plurality of stacks of secondary batteries in each of which electrode plates, stacked via a separator, are accommodated and sealed in an outer sheath member, with electrode terminals correspondingly connected to the electrode plates and extracted from an outer peripheral edge of the outer sheath member, a pair of plate-like members, stacked as outermost layers of the battery stack body, respectively, so as to be opposed to each other, and a pressing mechanism pressing the plurality of secondary batteries via the pair of plate-like members. At least one of the pair of plate-like members having a characteristic exhibiting a maximum rigidity at a pressing center determined based on a plurality of pressing points of the at least one of the pair of plate-like members that are pressed by the pressing mechanism.

Abstract: Packing according to the invention includes a cylinder portion which extends in a direction of an axis, and in which a diameter of a portion in one end side is increased when the packing is fitted to an object. The cylinder portion includes a fold portion which has a tortuous periphery in a cross section orthogonal to the direction of the axis.

Abstract: A rectangular air battery includes: a first case having a bottom with air holes; a second case; and an insulating gasket with a substantially U-shaped cross-section. The first case and the second case are joined such that the opening of the second case faces the bottom of the first case, and are sealed by crimping the opening edge of the sidewalls of the first case onto the outer face of the second case, with the outer sidewalls of the insulating gasket interposed therebetween. A rib is provided on the bottom of the first case so as to protrude inward inside the first case. The rib extends along the four sidewalls of the first case and supports the inner lower end of the inner sidewalls of the insulating gasket, with at least a separator interposed therebetween.

Abstract: A non-aqueous electrolyte battery of the present invention includes a non-aqueous electrolyte containing a lithium salt, a cyclic sultone derivative, and an acid anhydride, wherein the non-aqueous electrolyte contains the cyclic sultone derivative in an amount of 0.3 to 3% by mass and the non-aqueous electrolyte contains the acid anhydride in an amount of 0.3 to 3% by mass. Furthermore, the non-aqueous electrolyte battery includes at least one selected from a cyclic sultone derivative and an acid anhydride, and an electrolyte salt. The electrolyte salt contains lithium salt A and lithium salt B. The lithium salt A is at least one selected from LiBF4, LiPF6, LiAsF6, and LiSbF6, and the lithium salt B is a lithium salt other than the lithium salt A. The electrolyte contains the lithium salt A in an amount of 2 mol % or more.

Abstract: A manganese dry battery with excellent leak-proof property is provided, in which electrolyte leakage does not occur even if the size of a positive electrode material mixture is increased to meet a demand for improvement in discharge property. In a sealing part, a first circular projection, a second circular projection and a third circular projection are arranged at the bottom in sequence from the center to the outside, and a positive electrode carbon rod supporting part is provided in an innermost periphery portion to have an interval from the first circular projection. A groove between the first projection and the carbon rod is formed to have a substantially rectangular vertical section, kraft board is pressed by flat bottom surfaces of the first and second projections and an opening of the zinc can is fitted between the second and third projections.

Abstract: A polymer battery module (2) provided with tabs (4) is put in a package (5) and an open end part of the package (5) is heat-sealed by a heat-sealing machine (10). The heat-sealing machine (10) is provided with a pair of sealing heads (10a, 10b) respectively having sealing surfaces (12). The sealing surfaces (12) of the sealing heads (10a, 10b) are provided with recesses (11) in parts thereof corresponding to the tabs (4) of the polymer battery module (2) contained in the package (5) as located in place between the sealing heads (10a, 10b) for heat-sealing.

Abstract: The instant specification discloses a flat battery constituted by sealing a power generation element with: a case that works as one electrode terminal; a sealing plate that works as the other electrode terminal and has a flat central section projected outward and a flat peripheral section extending substantially parallel to the flat central section; and a gasket that insulates the case from the sealing plate, characterized in that the peripheral section of the sealing plate has an outer circumferential part being bent, or the case has a turned edge provided to make the peripheral section of the sealing plate fitted therein via the gasket and to partly press the gasket. The flat battery of the present invention having improvement in shape of the sealing plate and/or the case is sufficiently thin and exerts the effects of high leakage resistance and excellent mass productivity.

Abstract: An electrochemical separator is formed insitu on an electrode surface within an electrochemical cell, preferably an alkaline cell cathode surface. The alkaline cell comprises a zinc anode, a and potassium hydroxide electrolyte. The cathode may comprise a cathode comprising manganese dioxide. The separator may be formed by coating an electrode surface preferably with a low molecular weight copolymer of polyvinyalcohol and polyvinylacetate. The film can be coagulated to form a permeable separator uniformly conforming to and covering the electrode surface irrespective of the shape and contour of the electrode. A separate protector disk can be inserted onto the top surface of the cathode to protect the cathode from shorting in the event that imperfections in the separator surface develop. The protector disk can have a protruding lip which surrounds and protects the inside corner edge of the cathode.

Abstract: A gasket-integrated case is obtained by punching out a circular piece from a metal sheet on which a gasket resin film having a round hole is integrally laminated with an adhesive, in such a way as to have a diameter concentric with, but larger than, the round hole, and by drawing the circular piece into a bottomed cylindrical shape. Elements for electromotive force and a sealing plate are then disposed on the case, and the periphery of the sealing plate is sandwiched and sealed by the periphery of the case by crimping, with a gasket including the resin film interposed therebetween, so that a coin-shaped battery is formed. The resin film has a thickness in the range of 20 &mgr;m to 150 &mgr;m and a modulus of elasticity equal to or greater than 35 kgf/mm2.

Abstract: A protection device for an electrical component that has a protective housing and a terminal cap. The protective housing has a base with a contact hole therethrough for accommodating an electrical terminal pin. A projecting perimeter wall extends from the base. Attached to the perimeter wall is an inwardly extending tapered rib. Each rib is tapered such that the end of each rib closest to the base surface extends from the perimeter wall further than the end of the rib furthest from the base surface. A terminal cap is placed within the perimeter wall and forced toward the base surface until the tapered ribs engage and are deformed by the terminal cap to provide an interference fit between the ribs and the terminal cap. A method of assembling a battery and an electrical component with such a protection device is also disclosed.

Abstract: A method of sealing an end of a battery container is disclosed. The method includes: (a) providing a plurality of supports in a wall of the container toward the end of the container; (b) scoring the wall of the container at a position between the end of the container and the supports; (c) inserting a top assembly into the container such that the top assembly contacts the supports; and (d) folding an edge of the container over the top assembly.

Abstract: An electrochemical cell constructed in accordance with the present invention includes a can for containing electrochemical materials including positive and negative electrodes and an electrolyte, the can having an open end and a closed end; a pressure relief mechanism formed in the closed end of the can for releasing internal pressure from within the can when the internal pressure becomes excessive; a first outer cover positioned on the closed end of the can to be in electrical contact therewith and to extend over the pressure relief mechanism; a second outer cover positioned across the open end of the can; and an insulator disposed between the can and the second outer cover for electrically insulating the can from the second outer cover. According to another embodiment, the second cover is dielectrically isolated from a current collector. The second cover is fastened to the can by the use of a double-seamed closure.

Abstract: An electrochemical cell having a container with a closed bottom end, an open top end, and side walls extending between the top and bottom ends has a pressure relief mechanism formed in the bottom end, and positive and negative electrodes disposed in the container. The pressure relief mechanism is a stress concentrator formed in the container for providing pressure relief to vent high pressure gases. The stress concentrator includes first and second crossing grooves and third and fourth arcuate grooves to provide for multiple stress concentration points which offers increased reliability of venting, reduced space required for the vent opening, and results in significant reduction of bulging in the closed bottom end of the container.

Abstract: An electrochemical cell constructed in accordance with the present invention includes a can for containing electrochemical materials including positive and negative electrodes and an electrolyte, the can having an open end and a closed end; an integral seal/inner cover assembly positioned in the open end of the can, the integral seal/inner cover assembly having a rigid inner cover and a seal preformed directly onto at least an inner-facing surface of the rigid inner cover; a collector extending through a central hole provided in the integral seal/inner cover assembly and into the can so as to contact one of the electrodes; and an outer cover positioned across the open end of the can proximate an outer-facing surface of the rigid inner cover, the outer cover being positioned so as to be in electrical contact with the collector. The rigid inner cover preferably includes at least one aperture extending from the inner-facing surface to the outer-facing surface of the inner cover.

Abstract: The invention provides a metal-air electrochemical cell, having a leak-proof, metal prismatic casing comprising a pair of interfacing interengaging rectangular tray-like casing components, a first substantially rectangular tray-like casing component having a first major surface and contiguous side walls for encompassing a cathode of the cell and a second inverted substantially tray-like casing component having a second major surface and contiguous depending side walls for encompassing an anode of the cell, the side walls of one of the casing components being of a height to facilitate the curling and crimping of an upper portion thereof over a peripheral edge area of the major surface of the other casing component to form a leak-proof, closed prismatic casing.

Abstract: Notches (21a, 21b) are formed at the corners of only one side edge (19a) of a metal jacket blank (19) of a rectangular metal strip. The blank (19) is rolled into a cylindrical shape so that its opposite sides (19a, 19b) are adjoined to each other forming an abutment joint (10) and a lower end (19c) of the blank (19) is inwardly curled and crimped to form a bottom, thus completing an outer metal jacket (18). After a cell member (26) is loaded into the metal jacket (18), the upper end (19d) of the blank (19) is inwardly curled and crimped to cause the notches (21a, 21b) to abut the other side edge (19b) of the blank (19), forming a curled abutment joint (20) along a direction (S) which is different from the radial direction (R) of the metal jacket (18). This arrangement prevents any dents caused by the buckling of the outer metal jacket (18) while being crimped, and allows dry cells to be more efficiently produced.

Abstract: An electrochemical cell containing a V-shaped gasket for sealing the cell and preferably the gasket has a compressive preloading on a selected area of the gasket to prevent premature venting of the cell.

Abstract: A closed container is filled through a metal fill port which is then sealed with a rigid metal ball press fitted into the port passageway.

Abstract: A method of forming a button-type battery includes: a) positioning first and second terminal housing members in facing juxtaposition to one another, and providing an anode, a cathode and an electrolyte intermediate the first and second terminal housing member central portions; b) providing a peripheral insulative sealing gasket intermediate the first and second terminal housing members, the insulative sealing gasket being in the shape of an annulus and having a radial extent which extends radially outward beyond the surrounding peripheral portions of the first and second terminal housing members; c) moving at least one of the juxtaposed first and second terminal housing members in the direction of the other to push the first terminal housing member container wall against the first gasket face and to simultaneously force the second terminal housing member peripheral portion against the second gasket face, and continuing such moving to bend the insulative gasket about the container wall and force it to be recei

Abstract: Collector assemblies and methods of making and using them, and electrochemical cells made with such current collector assemblies, are disclosed. The invention provides a current collector assembly which permits safe, effective venting of pressure in the cell; reduces early activation of venting structures in the current collector assembly; contains fewer piece parts than known structurally-robust current collectors; is easy to implement; and provides superior tolerance to outside impact forces. Current collectors of the invention provide a stiffer, more rigid washer, repositioned closer to the bottom plate at its central region while the washer maintains the traditional function of controlling positioning of the seal body of the current collector assembly.