Abstract: An electronic apparatus and a battery by which battery inserting and removing operations can be performed smoothly with certainty are disclosed. When a battery is inserted into a battery accommodating chamber, a locking projection of a spring is contacted once with and resiliently deformed outwardly in a widthwise direction by and then slidably moves on an edge portion of a projecting wall. However, when a connector section and an electronic apparatus side connector section are coupled soon, the locking portion of the spring is engaged with a locking recess. In this state, an inclined face of the locking portion displaced to the electronic apparatus side connector section is lockably engaged with a wall face of the locking recess displaced toward the connector section and biases the battery forwardly toward the electronic apparatus side connector section by resilient force of the resilient portion.

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 flat secondary battery having a fusion-bonded sealing type laminate film as an armored body tends to be inferior in sealing reliability to a flat secondary battery having a welded sealing type can as an armored body, due to a difference in sealing method between the two batteries. Therefore, there has been a large challenge of finding the way to make the sealing reliability of the laminate film secondary battery closer to that of the can type secondary battery. The sealing reliability is improved by further increasing a sealing force without taking any measure to the existing laminate film secondary battery, in such a manner that the fusion bonding area of the existing laminate film secondary battery is sandwiched from upside and downside to be cramped from outside so as to mechanically add a sealing force from outside to the sealing force of the laminate film itself.

Abstract: An insulative feedthrough receives an electrical lead therethrough and includes a ferrule having first and second open ends and an interior surface. At least one polymeric guide member is positioned substantially within the first end of the ferrule and has an aperture therethrough for receiving the lead. An insulating material is deposited in the ferrule through the second end for sealingly engaging the lead and the interior surface of the ferrule.

Abstract: A secondary battery which can prevent leakage of an electrolytic solution by improving the sealing property of an electrolytic solution injection hole formed at a cap plate comprises: an electrode assembly including a cathode plate, a separator and an anode plate; a can having an upper opening for receiving the electrode assembly; and a cap assembly which is combined with the upper opening of the can, and which includes a cap plate provided with an electrolytic solution injection hole at one side thereof. A groove is formed in an axial direction on an inner circumferential surface of the electrolytic solution injection hole. Thus, the contact area between a stopper and the electrolytic solution injection hole is increased, thereby improving the sealing property of the electrolytic solution injection hole.

Abstract: A battery receptacle includes an insulative casing, positive and negative electrodes, and an interface assembly. The positive and negative electrodes have end portions disposed on the casing. The negative electrode has an end portion disposed on the casing. The interface assembly is disposed on the casing, and includes an insulative body, anode and cathode terminals, a contact element, and an insulating protrusion. The anode terminal projects from the insulative body, and is in electrical contact with the end portion of the positive electrode. The cathode terminal is provided on a periphery of the insulative body. The contact element is in electrical contact with the cathode terminal, projects from the insulative body, and is in electrical contact with the end portion of the negative electrode. The insulating protrusion is provided on the insulative body, and abuts against the end portion of the positive electrode.

Abstract: A square-shaped storage battery including a rectangular accumulator element (16), a sealed case (30) that accommodates the accumulator element, and a resin plate (20) which is formed of a hard resin having insulating properties and interposed between the sealed case and the accumulator element for limiting movement of the accumulator element.

Abstract: A rechargeable battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the two electrodes, a container for receiving the electrode assembly inside, and a cap assembly fixed to the container. The cap assembly includes a cap plate fixed to the container, an external terminal disposed in the cap plate to electrically be coupled with the electrode assembly, and a tubular body that surrounds the external terminal to fix the external terminal to the cap plate. The external terminal includes at least one groove formed toward inside of the external terminal for fastening the external terminal to the tubular body.

Abstract: An alkaline battery of the present invention includes a battery case, a power generating element housed in the interior of the battery case, and an assembled sealing part for closing the opening of the battery case. The assembled sealing part includes a resin sealing member. The sealing member includes a central cylindrical portion having a through-hole for inserting a shank of a negative electrode current collector therethrough, a peripheral cylindrical portion interposed between the periphery of the negative electrode terminal plate and the end portion of the opening of the battery case, and a joint portion for joining the central cylindrical portion and the peripheral cylindrical portion. The end portion of the opening of the battery case is curved such that the top of the peripheral cylindrical portion of the sealing member is wrapped therein, and the curved portion is crimped inward so that the periphery of the negative electrode terminal plate is fixed tightly.

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 secondary battery comprises a bare cell including an electrode assembly composed of positive and negative electrodes and a separator, a can acting as a container for containing the electrode assembly and an electrolyte, and a cap assembly having a cap plate for covering the open upper end of the can and a lead plate coupled to a part of the cap plate, wherein an electrolyte injection hole is positioned on a side of the cap plate. The lead plate has a bottom portion which covers the electrolyte injection hole and at least a part of which is coupled to a surface of the cap plate. Additionally, a part of the lead plate, which corresponds to the electrolyte injection hole of the bottom portion, is removed to form a hole so that a cap which seals the electrolyte injection hole is exposed.

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: An insulative feedthrough receives an electrical lead therethrough and includes a ferrule having first and second open ends and an interior surface. At least one polymeric guide member is positioned substantially within the first end of the ferrule and has an aperture therethrough for receiving the lead. An insulating material is deposited in the ferrule through the second end for sealingly engaging the lead and the interior surface of the ferrule.

Abstract: A rechargeable battery (2) and a circuit substrate (3) are connected by lead plates (4, 5) and united by a primary mold (11) that is formed by filling resin therebetween, after which a secondary mold (12) is formed on the outer face by filling resin at necessary locations and a winding sheet (13) is wound around the periphery, thereby forming a battery pack.

Abstract: An integrated cap assembly of a secondary battery. A cap lamination forms a top portion of the secondary battery and serves as a connection terminal while the secondary battery is charged or discharged. A gasket is molded integrally with the cap lamination in such a manner that a peripheral portion of the cap lamination is inserted in the gasket, the gasket insulating the cap lamination from a can of the secondary battery and sealing a gap between the cap lamination and the can.

Abstract: A nonaqueous secondary electrolytic battery comprising an electricity-generating element formed by spirally winding a laminate of a positive electrode plate, a separating material and a negative electrode plate, and an electrolytic solution with which the separating material, if it is a separator, is impregnated. The electricity-generating element is sealed in a battery case formed by a resin-laminated sheet comprising a metal layer as a barrier layer. Only a pair of lead terminals are drawn to the exterior of the battery case. The resin sheet comprises an oriented resin layer laminated on both surfaces of the metal layer. The inner heat-fused layers are opposed and heat-fused to each other. A molten and solidified resin mass is formed protruding from the inner end of the welded portion toward the inner space of the battery by 0.1 mm or more. Alternatively, the welded portion is formed thinner at the outer end thereof than at the inner end thereof.

Abstract: An insulative feedthrough receives an electrical lead therethrough and includes a ferrule having fist and second open ends and an interior surface. At least one polymeric guide member is positioned substantially within the first end of the ferrule and has an aperture therethrough for receiving the lead. An insulating material is deposited in the ferrule through the second end for sealingly engaging the lead and the interior surface of the ferrule.

Abstract: A cap assembly including a cap plate having a port aperture, an electrode port inserted into the port aperture, and an insulating member formed between the cap plate and the electrode port to insulate the cap plate and the electrode port and to tightly bind the electrode port to the cap plate, wherein the insulating member, the cap plate, and the electrode port form a single integrated body.

Abstract: A headspace insulator for a battery cell operatively coupled to circuitry within an implantable medical device in including one or more of the following: (a) a body of electrically and thermally insulating material disposed between a battery electrode assembly and a battery cover, (b) a receiving area within the body that receives and isolates a battery feedthrough pin, (c) an indentation within the receiving area retaining the feedthrough pin within the receiving area, (d) a raised portion coupled to a battery cover providing an air gap between the cover and the headspace insulator near case-to-cover weld areas, (e) a feedthrough aperture adapted to receive a feedthrough assembly, (f) a pin aperture that receives the feedthrough pin, (g) a fillport aperture for electrolyte fluid flow through the headspace insulator, and (h) a slot that locates a battery weld bracket and isolates it from the feedthrough pin.

Abstract: Electrode plate assemblies forming independent elements for electromotive force each contained in a partition member are series-connected and accommodated in a battery case. Each element is constructed as a nickel-metal hydride rechargeable battery cell and has an electromotive force of predetermined voltage, and so the battery connected in series has an output voltage and can be applied to general-purpose uses.

Abstract: A secondary battery in which the structure of an insulating case arranged between an electrode assembly and a cap assembly prevents electrode tabs from being bent. The secondary battery includes: an electrode assembly including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and electrode tabs respectively extending from the positive electrode and the negative electrode; a can for accommodating the electrode assembly; a cap assembly attached to an opening of the can and connected to the electrode tabs; and an insulating case arranged between the electrode assembly and the cap assembly and including a hole through which one of the electrode tabs pass, the insulating case including barrier ribs respectively extending from at least portions of side walls of the hole.

Abstract: A polymer battery pack includes a polymer battery, an outer case having a first outer panel and a second outer panel, the outer case enclosing the polymer battery, an electrode tap in electrical communication with the polymer battery and positioned outside the outer case, and a protecting circuit board in electrical communication with the electrode tap and positioned outside the outer case, for enhanced operation and durability.

Abstract: A pouch-type lithium secondary battery includes a battery unit having a positive plate, a separator, and a negative plate; a plurality of electrode tabs, drawn from the positive and negative plates, respectively; a case, formed with a space receiving the battery unit and with upper and lower sealing surfaces thermally fused to each other; and an insulating tape wrapping the electrode tabs, wherein a portion of the insulating tape interposed between the upper and lower sealing surfaces is thermally fused to the upper and lower sealing surfaces, and an end portion of the insulating tape is exposed outside the case together with the electrode tabs and positioned outside the upper or lower sealing surface after being folded. A portion of the insulating tape exposed outside the sealing surface of the case is extended and the extended portion of the insulating tape comes in contact with the end portion of the sealing surface after being folded.

Abstract: In order to enable the safer use of an assembly of multiple cells comprising: a plurality of unit cells; an outer container for housing the unit cells; a terminal plate for sealing an upper opening of the outer container; and a positive output terminal and a negative output terminal formed on the same face of the terminal plate, at least the side face of the negative output terminal is covered by a protective tube having an electrical insulation property.

Abstract: A battery pack includes a laminate battery having a built-in electrode held inside thereof by connecting a first sheathing film and a second sheathing film at lap sections thereof along outer peripheries of the electrode. A terminal substrate is disposed at the lap section and includes output terminals at a front surface side thereof. A substrate holder is disposed between a rear surface of the terminal substrate and the lap section, and a first metal plate is laminated on a first sheathing film side of the laminate battery. In the battery pack, the terminal substrate is supported by the substrate holder, the lap section, and the first metal plate, and the output terminals of the terminal substrate are disposed at positions so as to be brought closer to the same plane as a front surface of the second sheathing film.

Abstract: In a structure of connecting battery terminals 101 and 102 to bus bars 16 and 17 wherein the plus terminal 102 and the minus terminal 101, projecting from an upper surface of a battery 100, are connected respectively to the pair of bus bars 17 and 16projecting from a relay block 10, an insulative-resin cover portion 11b, which covers at least an upper surface of one (17) of the bus bars, and another insulative-resin cover 11g, which covers at least a lower surface of the other bus bar 16, project from a block body 11 of the relay block 10, thereby preventing short-circuit between the two bus bars 16 and 17.

Abstract: The invention provides a closed type battery comprising an electrode-leading terminal formed by caulking that ensures satisfactory sealing sealability. That terminal comprising a metal plate for sealing up an opening in a battery can, an insulating member that cover a through-hole provided through the metal plate and both surfaces of the metal plate around the through-hole, an electrode-drawing sheet positioned on a surface of the insulating member located on an outer surface of a battery and an electrode-leading pin that is inserted into the through-hole in the electrode-drawing sheet and caulked from above and below. At the surface of contact of a flange of the electrode-leading pin with the insulating member there is provided at least a projection.

Abstract: The present invention provides a closed type battery that is free from any sealing defects due to a sag of caulking with time, etc. The closed type battery is constructed of a monolithic electrode terminal that comprises an insulating member for covering the inner surface of a through-hole formed through a metal sheet for sealing up an opening of a battery can and both surfaces of the metal sheet around the through-hole, and an electrode-drawing sheet having a synthetic resin layer formed on one surface thereof, which sheet is located on the surface of the insulating member positioned on the outer surface of the battery while the synthetic resin layer comes in contact therewith, wherein the electrode-drawing sheet and the insulating member are integrated together by means of an electrode-leading pin passed through a through-hole in the electrode-drawing sheet.

Abstract: A process for producing a lead-acid battery, in which a lead bushing cast in a lid b of an assembled lead-acid battery A and a pole inserted through an insertion hole in the lead bushing are welded together by applying a laser beam thereto. At the time of the laser welding, as desired, a jig is so placed around the lead bushing as to surround it and the laser welding is carried out.

Abstract: A body implantable medical device (IMD) includes a first shell and a second shell whose outer surfaces are biocompatible. The IMD further includes a battery enclosure defined by all or a portion of the first shell of the IMD housing and a cover. The cover of the battery enclosure is disposed between the inner surfaces of the first and second shells, has a greater rigidity than the first shell, and includes an improved feedthrough assembly for an electrochemical cell, such as a flat liquid electrolyte battery, provided in the battery enclosure. Electronic circuitry, supported on a flexible wiring substrate, is provided between the inner surface of the second shell and the cover of the battery enclosure. A hermetic seal is provided between the cover of the battery enclosure and all or a portion of the first shell.

Abstract: Mechanically and thermally improved rechargeable batteries, modules and fluid-cooled battery pack systems. The battery is prismatic in shape with an optimized thickness to width to height aspect ratio which provides the battery with balanced optimal properties when compared with prismatic batteries lacking this optimized aspect ratio. The optimized thickness, width and height allow for maximum capacity and power output, while eliminating deleterious side affects. The battery case design allows for unidirectional expansion which is readily compensated for by applying external mechanical compression counter to that direction. In the module, the batteries are bound within a module bundling/compression means under external mechanical compression which is optimized to balance outward pressure due to expansion and provide additional inward compression to reduce the distance between the positive and negative electrodes, thereby increasing overall battery power.

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: A feedthrough arrangement includes a titanium alloy terminal for conducting electrical current between a first environment within a housing and a second environment outside of the housing. An insulating member is positioned around a portion of the terminal. A sleeve member is positioned around the insulating member. The terminal, insulating member, and insulating member all being in sealing engagement therewith to environmentally isolate the first and second environments.

Abstract: By using a rivet which serves also as a terminal member, and a sealing member which serves also as an insulating member, the terminal member and the insulating member can be omitted, thereby forming the lid of the secondary battery from only three parts, i.e. the body, rivet and sealing member. The sealing member includes a cylindrical portion and a flange portion which are separate members. The cylindrical portion is formed by cutting a fluororesin tube. The flange portion is formed by punching a polypropylene resin sheet. Thus, the number of parts can be reduced to four, so that it is possible to reduce the parts cost and manufacturing cost as compared to conventional lids.

Abstract: An insulative feedthrough receives an electrical lead therethrough and includes a ferrule having fist and second open ends and an interior surface. At least one polymeric guide member is positioned substantially within the first end of the ferrule and has an aperture therethrough for receiving the lead. An insulating material is deposited in the ferrule through the second end for sealingly engaging the lead and the interior surface of the ferrule.

Abstract: In order to enable the safer use of an assembly of multiple cells comprising: a plurality of unit cells; an outer container for housing the unit cells; a terminal plate for sealing an upper opening of the outer container; and a positive output terminal and a negative output terminal formed on the same face of the terminal plate, at least the side face of the negative output terminal is covered by a protective tube having an electrical insulation property.

Abstract: Vulnerable surfaces of feedthroughs employed in electrochemical cells or batteries, particularly miniaturized, high energy density primary batteries for implantable medical devices (IMDs), are provided with protective coatings to protect from degradation by the cell electrolyte or deposition of conductive materials bridging the feedthrough pin and ferrule. A liquid polyimide coating is applied to the vulnerable surfaces and cured into a substantially uniformly thick polyimide coating that tenaciously adheres to the vulnerable surfaces during subsequent welding and molding assembly steps. A further insulator is preferably molded in situ of a polymer adhere wells to the polyimide coating during molding. Gaps between the insulator and the polyimide coating are advantageously minimized.

Abstract: A nonaqueous secondary electrolytic battery comprising an electricity-generating element formed by spirally winding a laminate of a positive electrode plate, a separating material and a negative electrode plate, and an electrolytic solution with which the separating material, if it is a separator, is impregnated. The electricity-generating element is sealed in a battery case formed by a resin-laminated sheet comprising a metal layer as a barrier layer. Only a pair of lead terminals are drawn to the exterior of the battery case. The resin sheet comprises an oriented resin layer laminated in both surfaces of the metal layer. The inner heat-fused layers are opposed and heat-fused to each other. A molten and solidified resin mass is formed protruding from the inner end of the welded portion toward the inner space of the battery by 0.1 mm or more. Alternatively, the welded portion is formed thinner at the outer end thereof than at the inner end thereof.

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 battery pack of the invention includes a laminate battery having a built-in electrode held inside thereof by connecting a first sheathing film and a second sheathing film at lap sections thereof along outer peripheries of the electrode, a terminal substrate disposed at the lap section and including output terminals at a front surface side thereof; a substrate holder disposed between a rear surface of the terminal substrate and the lap section; and a first metal plate laminated on a first sheathing film side of the laminate battery. In the battery pack, the terminal substrate is supported by the substrate holder, th lap section, and the first metal plate, and the output terminals of the terminal substrate are disposed at positions to be brought closer to the same plane as a front surface of the second sheathing film.

Abstract: A unitary lid for the casing of an electrochemical is described. The lid has a terminal lead ferrule and a fillport formed from a single blank in a machining process. The lid does not require any welding except for securing it to the open end of a casing container. This helps the lid contribute to the cell's volumetric efficiency, which is especially important for cells powering implantable medical device.

Abstract: An electric energy storage device for reducing electric resistance between the anode/cathode electrodes and their terminals is disclosed. In the electric energy storage device, an anode electrode and a cathode electrode are stacked to have offset areas with predetermined margins and an insulating film is inserted therebetween. And, the stacked electrodes between which the insulating film is inserted is rolled up so as to form an electrode body. A plate type anode terminal and a plate type cathode terminal which have the thread-like unevenness at their bottoms are connected to a top and bottom of the rolled electrode body respectively. A metal layer is formed on both contact areas of the anode and cathode electrodes by plasma or arc spray.

Abstract: Battery with a flexible laminate casing includes a means for fixing the electrode assembly (2) within the casing (1, 18). The fixing means may be a frame (19, 33, 38, 50, 54) attached to the periphery of the electrode assembly, or an insulating spacer (59, 69, 70, 77, 78) encased within the casing together with the electrode assembly such as to fill a space between one end of the electrode assembly and the casing. Alternatively, the fixing means may be constructed of a material with which the casing and the electrode assembly are joined together by applying heat and pressure, or may be an abutting surface (87h) provided to the casing (87) itself such as to make contact with one end face of the electrode assembly within the casing.

Abstract: A cap assembly including a cap plate having a port aperture, an electrode port inserted into the port aperture, and an insulating member formed between the cap plate and the electrode port to insulate the cap plate and the electrode port and to tightly bind the electrode port to the cap plate, wherein the insulating member, the cap plate, and the electrode port form a single integrated body.

Abstract: A rechargeable electric battery including a plate block arranged in a plastic block box, positive and negative electrodes located in the box and electrically isolated by separators and conductively connected by sulfuric acid electrolyte, a cover for the box which has closure plugs and/or acid state indicators fitted in a gas-tight manner to openings therein, wherein at least a portion of an inner surface of the battery is electrically conductive or is provided with an electrically conductive layer, beginning in an area of a sealing seat of the closure plug or of the acid state indicator, and is electrically conductively connected to the electrolyte.

Abstract: An energy storage device, such as an electrical storage battery, having a unique terminal structure, sealing arrangement and an S-shaped mandrel for the electrode assembly. The battery generally includes a case in which an electrode assembly is dispose, and a cover provided with a fill hole and fill plug, and a terminal structure that forms a battery terminal. The terminal hole and the fill hole have counter bore structure to provide tighter sealing. A nickel layer is provided on the aluminum fill plug to facilitate electrical contact with the external circuit. A mandrel is provided for the rolled electrode assembly, and is electrically coupled to the terminal structure via a push-in tab inserted into a space in the S-shape of the mandrel.

Abstract: A connection (1) is provided between a conductive substrate, in the form of a planar aluminium terminal (2), and a laminate (3). The laminate has a first plastics layer, in the form of a polymer layer (4), that is secured to terminal (2) and a conductive aluminium layer (5) disposed outwardly from and adjacent to layer (4). The layers (4, 5) terminate at a common circular edge (6) that defines an opening (7) that overlies terminal (2). The connection (1) includes an insulator in the form of a grommet (8) that extends over edge (6) for electrically insulating layer (5) from terminal (2).

Abstract: A battery having an electrode assembly located in a housing that efficiently utilizes the space available in many implantable medical devices is disclosed. The battery housing provides a cover and a shallow case a preferably planar, major bottom portion, an open top to receive the cover opposing the bottom portion, and a plurality of sides being radiused at intersections with each other and with the bottom to allow for the close abutting of other components located within the implantable device while also providing for efficient location of the battery within an arcuate edge of the device. The cover and the shallow case being substantially hermetically sealed by a laser weld technique and an insulator member disposed within the case to provide a barrier to incident laser radiation so that during welding radiation does not impinge upon radiation sensitive component(s) disposed within the case.

Abstract: A laminate packaging flat cell comprises a laminate film formed by combining polymer and metal with each other; a power generating element formed of a plurality of electrode plates and separators, and hermetically sealed by the laminate film; and an electrode terminal lead coupled to the electrode plate. In the laminate packaging flat cell of the present invention, the power generating element is hermetically sealed by forming a thermally welded portion on an outer periphery of the laminate film, and the electrode terminal lead protrudes from the thermally welded portion, and a through-hole is provided in a position thereof contacting the thermally welded portion.

Abstract: A unitary lid for the casing of an electrochemical energy storage device is described. The lid has a terminal lead ferrule and a fill port formed from a single blank in a machine process. The lid does not require any welding except for securing it to the open end of a casing container. The ferrule supports a terminal lead insulated therefrom by glass. A thermoplastic insulator material encases the ferrule and a portion of the terminal lead extending below the lid. In that manner, the insulator helps prevent contact between the anode and the cathode in the vicinity of the lid.