Abstract: The invention features a prismatic battery with an electrically conductive housing comprising an elongated, prismatic can with an open end, and a housing cover pressed into the open end of the can and welded in place. The novel cover has an outer flange about its periphery, extending generally in the direction of extension of the sides of the can, which elastically deflects as the cover is pressed into the can to provide good contact for welding. The cover has two raised bumps forming internal pockets that are part of the internal volume of the cell. The bumps are also arranged to prevent rotation of the seal/vent assembly. One embodiment includes a plugged fill hole in one of the bumps. Corresponding methods of manufacture are also disclosed.

Abstract: An assembly of an electronic device within a sealed chamber of a flexible container. The electronic device, which may be a printed circuit board, has signal terminals connected to elongated insulated signal conductors. These conductors pass through a laminate construction wall of the container for connection to outside conductors. The signal conductors are electrically isolated from an EMI protection layer which forms part of the laminate construction wall. A grounding device connects a ground conductor of the electronic device to the EMI protection layer. The grounding device comprises a ground element having teeth on one side. A screwthread arrangement extends through the container wall and clamps the ground element onto the wall with the teeth cutting into the EMI protection layer to be in electrical contact therewith. The ground conductor is electrically connected to the screwthread arrangement.

Abstract: A non-aqueous electrolyte battery wherein the battery element comprising a cathode, an anode and separator, is housed and sealed completely into a cylindrical metallic casing after being impregnated with electrolyte, and said battery is featured by that the opening of its casing is sandwiched between and closed by the insulating gasket placed at the internal surface, and the metallic reinforcement placed at the external surface.

Abstract: An electrochemical cell containing a snap-through sealing gasket that has a compressive preloading on a selected area of the snap-through gasket to prevent premature venting of the cell.

Abstract: Unitary fill port and terminal constructions and methods for filling and sealing are disclosed for electrical devices comprising liquids. The invention is particularly suited for use in prismatic batteries comprising non-aqueous organic electrolytes.

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: A sealed galvanic dry cell that has a sealing means comprising a terminal cover having a peripheral extending flange that is compressed between a neutral cover and a rim of the open end of a cell's container by use of a compressable gasket that operates such that the rim of the container further interlocks with the flange of the terminal cover upon the buildup of internal pressure to effectively maintain the seal for the cell.

Abstract: An electrochemical cell containing a vent assembly for sealing the cell and having a snap-through seal membrane in the form of a concave contour that is designed to snap from a concave contour to a convex contour and rupture upon the build-up of a predetermined pressure within the cell.

Abstract: A metal support disk useful in sealing an electrochemical cell exerts a resilient outward radial force against the seal to assure seal integrity over a wide temperature range and exerts an upward force against an adjacent metal end cap terminal to assure continued mechanical and electrical contact with the terminal. The support is a stepped disk having a centrally located, shallow, cylindrical pill-box, with the bottom of the pill-box extending radially outward into an annular ring. A spring means in the form of an S-shaped rim extends down from the periphery of the ring, terminating at its bottom in an outward extending flange. The edge of the flange presses a plastic seal member against the inside wall of the cell to form the seal.

Abstract: An electrochemical cell has a wheel shaped, molded plastic seal member of a unitary construction which includes a central cylindrical hub from which depend in outward radial sequence, an annular pressure vent, a boss, a downward projecting skirt, an annular flexure means for providing radial movement and an outer rim terminating at its periphery in a cylindrical wall. The pressure vent includes a thin membrane ring depending from the hub which joins the hub to an annular diaphragm. A hinge ring joins the periphery of the diaphragm to the boss. The seal member is designed so that the membrane ring fails primarily in shear at excessive cell pressure which makes the vent more reliable and easier to fabricate.

Abstract: A container for a battery and a method for manufacturing such a container are provided. The container includes a housing; a cover adapted for attachment to the housing by crimping; and a gasket crimped to the cover and housing. One or more grooves are formed in the housing or cover or both. During assembly, the gasket is positioned between the cover and the housing, and a portion of the cover and a portion of the housing are crimped together causing the gasket to flow into and conform to the shape of the grooves. Placement of the gasket within the grooves increases the surface area of the resultant seal thereby improving the seal quality without significantly increasing the thickness of the battery or cell. In addition the grooves prevent the gasket from flowing out of the crimped seam and help to maintain the crimp pressure throughout the lifetime of the battery.

Abstract: An electrochemical cell including a current collector assembly having a current collector, a seal and a compression means wherein the compression means and collector exert minimum tension and maximum compressive stresses on the seal thereby avoiding leakage of electrolyte either through or around the seal.

Abstract: A button-type battery is disclosed comprising a cathode, an anode, a solid electrolyte, a first terminal housing and a second terminal housing. The cathode is bonded to a conductive substrate which bears against one of the terminal housings. The anode has a diameter smaller than both the cathode and the solid electrolyte.

Abstract: This invention pertains to electrode cans and metal air electrochemical cells made with the electrode cans. The invention provides improved structure, and methods for making the outer edge of the closed end of the can at the joinder of the closed end of the can with an side wall extending from the closed end. A substantially flat portion of the outer surface of the closed end of the can extends outwardly of the inner surface of the side wall. The electrochemical cells are assembled using improved assembly methods. Button-type electrochemical cells made using the invention are free of the inward dishing common to especially cathode cans in such button cells.

Abstract: A sealing and insulating member for a cylindrical galvanic cell wherein said member comprises a plurality of vent membranes of non-circular configuration. The seal can readily be made from mineral filled polyolefin material by injection molding.

Abstract: This invention pertains to alkaline electrochemical cells, typically to metal-air cells of the button-type. Non-reactive elements of cells of the invention are thinner than corresponding non-reactive elements of prior art cells. Such elements can be made thinner because of improved structures of such elements. The anode can is made from a metal strip structure having a higher steel content. The cathode can has a modified temper, which improves relative stiffness and rigidity while retaining sufficient ductility. The seal disposed between the anode can and the cathode can is made thinner. Structure of the corner of the cathode can between the bottom and the side wall is improved. By so reducing the thicknesses of non-reactive elements of the cell, and thus the volume occupied by such non-reactive elements, the fraction of the cell devoted to holding electrochemically reactive anode material therein is increased, with corresponding increase in the milliampere hour capacity of the cell.

Abstract: A flat-type cell comprising cup shaped positive and negative electrode cases, each having a cylindrical part with the negative electrode case being placed inside the positive electrode case with their cylindrical parts facing each other with a gasket in between, wherein the cylindrical part of the negative electrode case has its open edge folded outwardly to form U shaped section and its cylindrical part expanded outwardly, so that the inner volume of the negative electrode case is enlarged and the electrical capacity is improved with decreased self-discharge and electrolyte leakage.

Abstract: A metal support disk for an electrochemical cell seal exerts a resilient outward radial force against the seal to maintain seal integrity over a wide range of operating temperature and, at the same time, exerts an upward force against the bottom of the metal end cap terminal of the cell to assure electrical contact between the anode inside the cell and the terminal. The disk includes a central, circular platform connected to an outer, sealing edge sealing flange by an annular flexure means which permits radially inward and outward movement of the sealing edge when the end of the cell is radially crimped during the sealing process. The crimping also moves the central portion of the disk up which results in the upward force being exerted against the end terminal. The flexure means is a sequential series of three annular, curved fibs with the first and third curved downward and the second curved upward.

Abstract: A design and process for making hermetically sealed thermocompression feedthrough and peripheral seal for high temperature Li Alloy FeS.sub.x battery cells and battery enclosures. The selected materials and processes parameters are developed to match the high temperature Li Alloy/FeS.sub.x system.

Abstract: In one aspect the invention is a lead-acid cell of the type having a container. The container has a jar and a lid. The jar has an upper perimeter defining an opening matingly engaging and closed by the lid. The container houses at least one positive electrode plate, at least one negative electrode plate, a separator interposed between the electrode plates, acid electrolyte absorbed in the electrode plates and separator, and electrical connections from the electrode plate(s) through the container to an output terminal location. The lid is sealed to the jar. The cell is improved by the lid and the jar including a mechanical means for retaining the mating relationship of the lid and with the jar, when the lid is placed upon the upper perimeter, of the jar.

Abstract: An electrochemical cell having a cold worked, complexly configurated and subsequently annealed cover over an open end of the cell housing, the cell cover incorporating a compression ring of high yield strength in radially outwardly compressive engagement with the inner face of a rim of the cover to compress the rim against a seal between the rim and the cell housing.

Abstract: This invention relates to a seal for a cylindrical alkaline cell. The member includes a metal support having an annular spring disposed at the outer periphery. The spring is placed under compression by a radial crimp and the spring is adapted to expand and contract whereby the seal is maintained during thermal cycling. The member also includes a plastic grommet having an annular vent designed to open at very high pressures whereby said seal member is particularly useful in alkaline cells having little or no mercury whereby high internal pressures can develop.

Abstract: A plastic sealing element for dry cells includes a radially symmetrical, contrally perforated base element, the upper side of which is provided with an elastomeric sealing material which is extruded in the form of a circumferential annular bead, and a process for its manufacture. After the sealing element is pre-assembled with the cell's metal housing cover and the cell is assembled, the annular bead is pressed flat during final crimping so that a sealing zone having a small cross section and defining a long leakage path is developed between the cover and the base element, effectively preventing the leakage of electrolyte or water vapor, which is especially diffuse from the cell's porous carbon rod conductor, into the cell's sealing zone.

Abstract: A high-temperature storage battery includes a housing and a stack of at least two storage cells disposed in the housing. Each of the storage cells has components loosely disposed on top of one another in the stack. The components include two reactant chambers, a planar ion-conducting solid electrolyte mutually separating the reactant chambers, and planar components serving as electrodes and bordering the storage cells toward the outside. At least one common resilient structural element presses the components of all of the storage cells together in a leakproof manner.

Abstract: A sealing and insulating member for a cell formed with an inwardly directed shoulder in the periphery of the member. A downwardly and outwardly extending skirt extends below the shoulder, the maximum diameter of which is located at its lowest extremity with that diameter being greater than the diameter at the bead of a cell can. The sealing and insulating member can be snap-fitted into the can prior to crimping, and held in place without the necessity to pre-crimp.

Abstract: Terminal contact is made between an electrode in an electrochemical cell and the external terminal therefor by capture of an electrically conductive portion of said electrode within or by a member of a compressively formed seal of the cell.

Abstract: A primary element of the round-cell type is effectively protected from desiccation by a sealing washer made of a flexible foamed plastic (preferably foamed PVC), placed above the depolarization electrode and clamped between the positive cap and the zinc can of the cell. An additional adhesive beading is provided on the carbon rod of the cell to prevent the passage of electrolyte through the central opening in the sealing washer which receives the carbon rod.

Abstract: An inexpensive, reliable seal for an electrochemical cell comprising tapered walls adjacent the upper open end of a metal cell container and a matched angle tapered metal cell top seated thereon with an interference fit with an insulating and sealing film of minimal thickness compressively held therebetween.

Abstract: A cell comprising a positive can and a negative collector fitted in the opening of the positive can, a gasket being set in the space between the positive can and the negative collector to prevent the leakage of liquid material from the cell, characterized in that the gasket is made of a synthetic resin composition comprising glass beads. The cell is much improved in its leak-proof properties.

Abstract: A leak-proof cell comprising a positive can and a negative collector fitted in the opening of the positive can, a gasket made of a synthetic resin being set in the space between the positive can and the negative collector to prevent the leakage of any liquid material in the cell, characterized in that the degree of crystallinity of the gasket set in the cell is at least 10% higher than that of the gasket immediately after molding.

Abstract: A closure for a galvanic element, and particularly a cylindrical cell, is formed in substance of a cap-like or toroidal, resilient member, whose upstanding outer rim is segmented by slits into distinct flaps. These are therefore capable of acting resiliently in a radial direction and are capable of maintaining in the sealing region a steady sealing pressure between the cup and a plastic closure member. During closing of the cell through crimping, the flaps are supported from inside by a crimper support sleeve. In this way, the plastic of the closure body is plasticized during movement of the crimping tool toward the die.

Abstract: A leak-proof alkaline cell comprising a negative electrode collector and a gasket, characterized in that the negative electrode collector is coated with a film comprising a triazole compound at least at the part faced to the gasket.

Abstract: A leak-proof alkaline cell comprising a positive can and a negative electrode collector kept at the opening end of the positive can with intervention of a gasket so as to make the inside of the cell liquid-tight, characterized in that the gasket is made of an alkali resistant, elastic material and has a moisture content of not more than 0.3% by weight.

Abstract: An improved seal closure for the open end of a cell comprising a cover including an annular depending flange which has a circumferential notch for engaging the inwardly turned peripheral edge of the cell, an annular recess located in the cover and extending below the level of the notch and a locking collar for insertion within the recess.

Abstract: A sealing grommet in a cylindrical electrochemical cell designed for long term use, the grommet having an extended area which is compressed between a separator having structural integrity and a cell top.

Abstract: A galvanic cell having a primary radial type seal in conjunction with a secondary resealable vent closure, said resealable vent closure comprising a resilient elastomeric sponge gasket disposed and compressed between the upper surface of the cell's cover and the rim of the cell's container, which is turned over the upper surface of the cover, so as to facilitate the venting of any high pressure gases that may escape past the radial seal while retaining liquid.

Abstract: A galvanic cell, and a method for making it, having a resealable vent closure consisting of a resilient elastomeric sponge gasket disposed and compressed between the cover of the cell and the upper wall of the cell's container and designed such that gas buildup within the cell in the range of about 5 to 75 psi will vent along the cover-gasket interface and/or container-gasket interface.