Abstract: A metal-resin composite having high gas sealing properties is provided. An aluminum alloy structure having a shape surrounding the copper 63 is firstly formed, and the attached aluminum alloy is made closely contact with the copper electrode 63 and further made engaged into the copper electrode 63 by pressing or forging. It is then machined into a predetermined shape so as to prepare the copper alloy 63 attached with an aluminum alloy part 61a. Subsequently, the surface treatment of the NMT or NMT 2 is given to three members of an aluminum electrode 62, the copper electrode 63 attached with the aluminum alloy part 61a and an aluminum alloy lid 61. These three members are inserted into an injection mold, and a thermoplastic resin composition 64 of PPS resin is injected. The lithium-ion battery lid 60 having a structure as shown in FIG. 11 is thus obtained.

Abstract: Provided are a cap assembly for a secondary battery and a secondary battery having the same. Here, when a can is sealed using a laser beam, soot and degradation of a gasket of the cap assembly may be prevented. The cap assembly includes an electrode terminal, a cap plate having a terminal through-hole, and a gasket disposed between the electrode terminal and the cap plate, and a distance between an outermost edge of the gasket and an outermost edge of the cap plate is 0.7 times or greater than a diameter of a laser beam used in a sealing process of the can.

Abstract: A rechargeable battery includes a battery case surrounding an electrode assembly. The battery case may include a cap plate having a vent hole, the cap plate being attached to the battery case, a vent plate disposed over and covering the vent hole, and a member protruding from an area of the cap plate surrounding the vent hole, the vent plate being on the member.

Abstract: A secondary battery includes an electrode assembly having a positive electrode tab and a negative electrode tab, a can housing the electrode assembly, a cap assembly sealing a top opening of the can, and a protective circuit module in a space between the cap assembly and the electrode assembly.

Abstract: Disclosed is a secondary battery, which includes: an electrode assembly; a can receiving the electrode assembly; and an insulation case provided at an upper part of the electrode assembly inside the can, where a stepped part thinner than the can is formed on an inner surface of an upper part of the can. The insulation case can be inserted to the stepped part and the cap plate can be seated on a second stepped part formed at the upper part of the stepped part and can have protrusions that contact the stepped part. The insulation case and cap plate are stably assembled to the can, thereby improving reliability of the process to weld the cap plate to the upper part of the can.

Abstract: A lead-acid battery comprising a container having at least one cell chamber and a lid body for covering a top opening of the container. The lid body has on a top surface a recessed portion having therein an annular portion protruding upward and having, in an area of a bottom wall inside the protruding portion, an exhaust hole for exhausting gas from the cell chamber, wherein a guide passage for guiding gas from the exhaust hole to the outside is formed by joining the protruding portion with a joining portion provided on the lid body cover. An annular groove formed between the protruding portion and the vertical wall is covered with an outer periphery of the lid body cover 5 and the guide passage is isolated from the groove.

Abstract: A welding method of a sealed secondary battery provided with a casing configured to encase therein electrodes and an electrolyte, a cap body configured to cover the casing, and two terminals inserted into holes provided in the cap body, connected to a pair of electrodes, and formed of a material including composition different from a material of the lead includes crushing and spreading the distal end side of each of two terminals along a cap body, and carrying out continuous welding along a boundary line between a circumference of the distal end side of the terminal, and the cap body, and alternately and repetitively by way of a position on the terminal side of the boundary line regarded as a reference line, and a position on the cap body side of the boundary line.

Abstract: A cap assembly includes a protective circuit module; and an injection molded upper cap integral with the protective circuit module and configured to be coupled to an opening of a can housing an electrode assembly, wherein the upper cap comprises sealing portions that extend in a first direction away from the protective circuit module, and wherein the sealing portions are configured to contact an inner surface of the can.

Abstract: The invention relates to a cover part (1) for a rechargeable battery, with the cover part (1) being produced from plastic and having at least one sleeve-like connecting socket (2) for making electrical contact with the rechargeable battery, with a lower section (26) of the connecting socket (2) being embedded in the plastic material of the cover part (1), wherein a plurality of sliding elements (3), which are in the form of strips and are separated from one another over the internal circumference of the connecting socket (2), are arranged on the inside of the connecting socket (2).

Abstract: The present invention relates to a secondary battery, and in particular relating to a secondary battery in which connection between the bare cell and the protection circuit can be established by a mechanical connection system without using molding method. A secondary battery of the present invention includes a bare cell in which charging and discharging can be performed, a protection circuit substrate electrically connected to the bare cell, a substrate molding body integrally formed with the protection circuit substrate, a support member having a connection unit coupled to the substrate molding body for connecting the substrate molding body to the support member, and a connection member for connecting the substrate molding body to the connection unit.

Abstract: A battery which can be assembled by using reduced man-hours. The battery has a battery cell having a positive electrode terminal and a negative electrode terminal which are arranged on one side surface of the battery cell, a circuit board placed facing the one side surface of the battery cell and having a first board terminal and a second board terminal, a first conduction member for conducting the positive electrode terminal and first board terminal to each other, a second conductive member for conducting the negative electrode terminal and the second board terminal to each other, a first cover placed between the circuit board and the battery cell, a second cover placed facing the first cover with the circuit board sandwiched between the first and second covers, a connection section for connecting the first and second covers to each other, and a cover for covering the circuit board.

Abstract: Cover for electrolytic batteries, comprising a primary cover adapted to be fixed on a container of electrolytic cells and provided with a plurality of openings for filling with electrolyte for respective electrolytic cells of the container, the walls of the openings being crossed transversely by a common gas collection channel, the cover comprising at least one secondary cover which can be fixed on the upper face of the primary cover to cover the openings, the secondary cover comprising a plurality of caps, each one of the caps being provided with a radial expansion adapted to engage in a gas-tight manner on the wall of the respective opening between the common gas collection channel and the upper face of the primary cover, the caps being not accessible when the secondary cover is fixed on the upper face of the primary cover.

Abstract: The object of the present invention is to provide an electric construction machine capable of efficiently cooling the battery mounted on the swing structure. To achieve the object, there is provided an electric construction machine in which a battery storage room 11 is formed in the swing structure 3 and a plurality of batteries 231 as electric power sources are arranged in the battery storage room 11, comprising: a battery storage structure 23 storing the batteries 231 and having an air flow channel through which air can flow upward from a lower part of the battery storage structure 23; a covering sheet 26 entirely covering the top and side faces of the battery storage structure 23; and a duct 27 for discharging the air, one end of which is arranged in an upper part of the covering sheet 26.

Abstract: A battery-cell structure of a battery is constructed to have a resinous spacer 5 with a frame shape surrounding thick central portions between a battery cell 3 arranged at an upper side and a battery cell 4 arranged at a lower side, and ventilation portions 62 and 64 that are provided in the resinous lower case 6 to communicate the exterior with depressed portions 61 of the resinous lower case 6 and have an up- and down symmetrical shape and size. It is constructed so that the battery cell 3 arranged at the upper side and the battery cell 4 arranged at the lower side are put in a vertical direction between the resinous lower case 6, the spacer 5 and the upper case 2.

Abstract: A secondary battery includes a can having an open end and housing an electrode assembly; a cap assembly sealing the open end of the can; and an insulating case located between the electrode assembly and the cap assembly, the insulating case comprising folding protrusions protruding from a peripheral surface of the insulating case and oriented such that a first side of the folding protrusion contacts the insulating case and a second side of the folding protrusion contacts the can.

Abstract: A packing case for a battery including an inside layer, an outside layer, and a metal layer formed between the inside and outside layers, wherein the outside layer comprises at least one sub-layer having a color different than a color of the metal layer; and a secondary battery including the packing case; and a method of manufacturing the secondary battery.

Abstract: A cover for electrolytic batteries, comprising an upper face and a lower face and provided with a plurality of openings for filling with electrolyte for respective electrolytic cells of the container, each one of the openings being surrounded by a wall, the walls of the openings being crossed transversely by a common gas collection channel, which is connected to a seat for a frit, the seat of the frit being arranged on the upper face of the cover, laterally with respect to the common gas collection channel and on a plane which is comprised between the channel and the upper face of the cover.

Abstract: A cap assembly (100, 200) for a lithium ion secondary battery (1000, 2000). The cap assembly includes a cap plate (30, 97), a leakproof film (20, 98), and a cap cover (10, 99). The cap plate (30, 97) includes a supporting portion (31, 971) and a safety film (32, 972). The safety film is positioned in the supporting portion (31, 971). The safety film (32, 972) defines safety grooves (33, 973). The safety film (32, 972) is capable of break down along the safety grooves (33, 973). The leakproof film (20, 98) is attached on the supporting portion (31, 971). The leakproof film (20, 98) is made of a material with high temperature resistance and elasticity properties. The cap cover (10, 99) is attached on the leakproof film (20, 98).

Abstract: Disclosed is a battery pack that enables its outer case to be formed in small thickness regardless of formability and material property, and has enhanced twisting resistance. The battery pack includes a bare cell for generating electricity, a circuit member provided at an upper part of the bare cell and electrically coupled to the bare cell, a frame case formed so as to expose front and back parts of the bare cell externally while covering the bare cell including the circuit member, and a film sheet connected to the frame case so as to cover the front and back parts of the bare cell.

Abstract: An battery end cap is disclosed for limiting current flow of a battery. The battery end cap includes a cap terminal, the cap terminal comprising an external conductive surface and an internal conductive surface. The battery end cap further includes a pressure sensitive switch, wherein when the battery end cap is installed on a battery, the pressure sensitive switch is configured to bias the internal conductive surface of the cap terminal from being in electrical communication with an electrical source of the battery. Electrical communication between the cap terminal and the electrical source is created or maintained when a sufficient external pressure is applied to the battery end cap and electrical contact between the cap terminal and the internal electrical source is broken without the sufficient external pressure.

Abstract: A protection circuit assembly and a battery pack including the same, which can simplify a manufacturing process and increase productivity. The protection circuit assembly includes a protection circuit board including a connection terminal, and a first lead plate connected to the connection terminal and having a coupling hole. The battery pack includes a bare cell having a protrusion, and a protection circuit assembly electrically connected with the bare cell and including a first lead plate having a coupling hole. Accordingly, the battery pack includes a protection circuit assembly including a lead plate having a coupling hole, and a bare cell including a structure inserted into the coupling hole, and thus it is possible to simplify a manufacturing process and increase productivity.

Abstract: Provided are a cover having a metallic grid structure and a method for manufacturing the cover. The cover includes a pattern portion formed of a metallic material, in which a plurality of patterns are independently disposed spaced apart from each other and an injection portion disposed between pattern portions to connect the pattern portions, the injection portion being formed of a non-metallic material. The method includes forming a pre-pattern portion including patterns in a regular or irregular form and a bridge connecting the patterns on a metallic plate, forming the injection portion on the pre-pattern portion by insert-injection or thermo-compression press, and removing the bridge.

Abstract: A battery includes: a first member having an opening a housing space which houses a generation element; and a second member which closes the opening of the first member. The first member and the second member have welded portions which are welded to each other. A groove which can receive a part of molten metal MM generated upon welding is formed in a channel between the first and the second member, i.e., from the welded portion to the housing space. This prevents flow of the molten metal generation upon welding to the housing space. A vehicle using the battery and a method for manufacturing such a battery are also provided.

Abstract: A lithium secondary battery includes a supporting sealing member between a safety vent and a gasket to enhance a safety of the lithium secondary battery by preventing a gas or an electrolyte from leaking.

Abstract: A rechargeable battery constructed with a bare cell, a protective circuit board electrically connected to the bare cell, a lead plate operationally connecting the bare cell and the protective circuit board, and a combining case covering an upper end of the bare cell, the protective circuit board and the lead plate. The lead plate is constructed with a first plate electrically connected to an outside surface of the protective circuit board, a second plate electrically connected to the bare cell, and an inside bending part connected between the first plate and the second plate. The first plate of the lead plate is bent around the inside bending part at 180 degrees such that the bare cell is coupled with the protective circuit board in parallel. Therefore, the distance between the bare cell and the protective circuit is reduced, and the capacity per volume of the rechargeable battery is increased.

Abstract: A battery module including a battery including a connection terminal; and a battery cell; and a protective circuit module including a printed circuit board having an inner surface that faces the battery, an outer surface that opposes the inner surface, and a terminal opening, and including a conductive pattern around a periphery of the terminal opening and an insulating part around the periphery of the terminal opening, wherein the connection terminal extends from the battery cell to the outer surface of the printed circuit board through the terminal opening, the conductive pattern is coupled with the battery cell through the connection terminal, and the insulating part contacts a portion of the conductive pattern that is closest to the terminal opening.

Abstract: Provided is a highly safe portable electronic device having a secondary battery as a power source, and including a package, an electronic device body housed in the package, and a battery housing portion housed in the package, in which even if the content melts due to an extremely significant impact applied thereto, discharge of a melt is inhibited. In the portable electronic device, the battery housing portion is a molding with a battery fitting portion for fitting the secondary battery therein, and the battery fitting portion has a covering layer, which includes a temperature suppression layer and a block layer, provided on its surface.

Abstract: A secondary battery includes an electrode assembly having a first electrode plate, a second electrode plate, and a separator disposed between the first and second electrode plates, a case accommodating the electrode assembly, and a cap assembly coupled to the case, the cap assembly including a cap plate sealing the case and having a short-circuit hole, a short-circuit plate covering the short-circuit hole of the cap plate, the short-circuit plate being spaced apart from an outer surface of the cap plate, a reversible plate adjacent the short-circuit hole, and a sealing member between the cap plate and the short-circuit plate.

Abstract: A holding mechanism for holding a battery includes a retaining member, a resisting member ant at least two limiting members. The retaining member limits the battery from movement in a first direction. The resisting member corresponds to the retaining member and engages with the retaining member to cooperatively support and limit the battery from movement in a second direction perpendicular to the first direction. The at least two limiting members are arranged at opposite sides of the retaining member and are used for limiting the battery from movement in a third direction. The third direction is perpendicular to the first direction and the second direction. An electronic device using the holding mechanism is also provided.

Abstract: A protective circuit module for a secondary battery includes a circuit board. At least one protection control circuit element for preventing overcharge and over-discharge of the secondary battery is mounted on the circuit board. A first conductive pad is coupled to the circuit board. A positive temperature coefficient device is between the at least one protection control circuit and the first conductive pad such that when a secondary battery temperature reaches a threshold value, resistance of the positive temperature coefficient device is increased and battery current is reduced.

Abstract: A secondary battery for an electronic appliance, including a battery cell. The battery cell has a positive electrode, a negative electrode, and an electrolyte in a pack. A positive electrode terminal and a negative electrode terminal are lead out from the same side face of the pack. A metallic battery can accommodates the battery cell therein such that the side face from which the positive electrode terminal and the negative electrode terminal are lead out is faced towards the opening side. A lid, made of a synthetic resin, in which terminal parts to be connected to the electrodes of the electronic appliance upon being connected to the positive electrode terminal and the negative electrode terminal are faced outwardly, plugs the opening of the battery can, the battery cell being accommodated in the battery can upon being adhered onto an inner face thereof.

Abstract: The present invention aims to provide a method for insulatively covering the side surfaces and bottom of a prismatic outer can in a simple manner. This can be realized by adopting the following configuration: a prismatic cell including a prismatic outer can having an opening at the top thereof; a sealing body for sealing the opening; and positive and negative electrode external terminals that are protruded from and insulated from the sealing body, wherein the prismatic outer can is covered on the side surfaces and entire bottom with a piece of folded insulation sheet. Preferably, the bottom of the prismatic outer can is covered with only one piece of the insulating sheet, and all edges of the insulating sheet is positioned above the bottom of the outer can.

Abstract: Disclosed herein is a secondary battery pack including a battery cell having an electrode assembly of a cathode/separator/anode structure mounted in a battery case together with an electrolyte in a sealed state, an insulative mounting member having openings, through which electrode terminals of the battery cell are exposed to the outside, the insulative mounting member being constructed in a structure in which a safety element is mounted to the top of the insulative mounting member, the insulative mounting member being in direct contact with the top of the battery cell, and an insulative cap coupled to the top of the battery cell such that the insulative cap surrounds the insulative mounting member while the safety element is mounted to the insulative mounting member, wherein the battery case is provided at the top thereof with at least one coupling groove, and the insulative mounting member is provided at the bottom thereof with at least one coupling protrusion corresponding to the at least one coupling groo

Abstract: An electronic device includes a fixing mechanism for a battery that includes a housing, a guide track positioned on the housing, a latching member slidably received in the guide track, a resilient member, a control, and a resisting member. The battery includes a latching slot. The latching member includes a latching end latching with the latching slot. The control resists the latching member to drive the latching member along the guide track. Two ends of the resisting member resist the latching member and the extended surface. The latching member is capable of sliding away from the battery to detach the latching end from the latching slot and elevate the battery.

Abstract: A sealed battery provided by this invention has a case (10) having an opening portion, and a lid (60) which closes the case opening portion. An inside protruding portion which enters into the case and mates with the case opening portion is formed in the face of the lid opposing the case, and a case peripheral wall portion (14) surrounding the opening portion and the lid are joined by welding. And, in a region in which the case peripheral wall portion and the lid are in close proximity, and which is at least a region including the inside edge (16) of the peripheral wall portion forming the case opening portion periphery, a barrier layer (70) is provided which impedes direct contact between the peripheral wall portion and the lid, and moreover, the edge portion of the barrier layer on the outer side of the case is formed midway in the opening end face (15) of the case peripheral wall portion, between the outside edge and the inside edge, without reaching the outside edge (18) of the peripheral wall portion.

Abstract: A power supply includes rectangular battery cells 1. Each cell 1 includes a rectangular container 11 covered with an electrically insulating film 2. The film 2 has a bottom cover 22, main covers 21, and side covers 23. The bottom cover 22 is arranged between the main covers 21. The side covers 23 protrude from the both sides of the main and bottom covers 21 and 22. Each side cover 23 has first and second side covers 23A and 23B. The first and second side covers 23A and 23B protrude from the side edges of the main and bottom covers 21 and 22. The first and second side covers 23A and 23B are continuously arranged in connection areas 24. When folded on side surfaces 11D of the container 11, the first and second side covers 23A and 23B are superposed on one another. The superposed parts 25 are welded.

Abstract: A battery pack for an electric power tool has a housing and a housing cover that closes off the housing. Battery cells are arranged in the housing and electrically conductingly connected to one another. An electronic circuit for monitoring operating parameters of the battery cells is provided wherein the electronic circuit is mounted on a circuit board and is arranged in the housing. The housing cover has an inner side facing the battery cells. The inner side has a receptacle that is delimited by an outer receptacle rim. The circuit board is received in the receptacle and is spaced from a bottom of the receptacle so that a filling space is provided between circuit board, bottom of the receptacle, and the receptacle rim. A cured potting compound fills out the filling space.

Abstract: A cap assembly includes a cap-up and a safety vent wherein an end of the safety vent is bent to cover an end of the cap-up, a first thickness of a first region of the cap-up in contact with the end of the safety vent is smaller than a second thickness of a second region of the cap-up not in contact with the end of the safety vent.

Abstract: The molding packaging material 1 according to the present invention includes a heat resistant resin layer 2 as an outer layer, a thermoplastic resin layer 3 as an inner layer, a metal foil layer 4 arranged between the heat resistant resin layer and the thermoplastic resin layer, and a black ink layer 10 arranged between the metal foil layer 4 and the heat resistant resin layer 2. The black ink layer 10 contains carbon black, diamine, polyol, and hardening agent. The black ink layer does not partially crack and detach even when the molding packaging material according to the present invention is used in a somewhat harsh environment such as a hot and humid environment and/or at the time of molding or sealing.

Abstract: An insulating case for a secondary battery and a secondary battery having the same, the insulating case having opposing first and second portions. The first portion faces an electrode assembly of the secondary battery and has a first melting point. The second portion faces a cap assembly of the secondary battery and has a second melting point that is higher than the first melting point. The first melting point is approximately the contraction temperature of a separator of the electrode assembly.

Abstract: A hermetically-sealed electrical feed-through device includes a conductor, an insulating sleeve, and an outer ferule interconnected in a manner preventing relative rotation therebetween and/or includes a thermocouple in direct contact with the conductor for monitoring temperature. The conductor can have a body section extending along an axis and having an outer contour including flats or an outwardly-extending eccentrically-shaped lobe. The sleeve confronts and covers the body section of the conductor and accommodates and engages the outer contour at the flats or lobe to prevent rotation of the conductor relative to the sleeve, and the outer ferrule sandwiches the insulating sleeve between the outer ferrule and the outer contour of the conductor. The outer ferrule accommodates and engages the sleeve adjacent the outer contour of the conductor at the flats or lobe to prevent rotation of the insulator sleeve relative to the outer ferrule.

Abstract: A rechargeable battery pack including a cap cover through which a protection element may be easily mounted and a coupling terminal which is integrally manufactured when forming the cap cover includes: a bare cell having an electrode terminal; a cap cover coupled to a leading side of the electrode terminal of the bare cell, and on which a through hole is formed; a first coupling terminal attached to an external side of the cap cover; and a protection element accommodated in the cap cover, electrically connected to the electrode terminal via a first coupling lead, and electrically connected to the first coupling terminal via the through hole by a second coupling lead.

Abstract: The present invention relates to a rechargeable battery, particularly a rechargeable battery having a bare cell, a protective circuit board, a lead plate, and a flat plate attached to a cap plate of the bare cell for connecting the lead plate to the cap plate. According to the invention, the lead plate is not directly combined with the cap plate, in which the cap plate is made of material differently from the lead plate, and the lead plate and cap plate are respectively welded to the metal layer made of the same material by means of the flat plate formed of metal, thereby allowing them to be easily combined with each other and the adhesive force to be enhanced.

Abstract: A secondary battery includes: a jelly roll that includes a positive and a negative electrode wound via a separator; a case; a lid; and electrically conductive input/output members, wherein: the electrically conductive input/output members include, at least; a positive and a negative electrode current collector plate with one end thereof connected to the positive and the negative electrode respectively; a positive and a negative electrode external conductive member with one end thereof connected to another end of the positive and the negative electrode current collector plate respectively and another end thereof extending to an outer side of the lid; the one end of the positive and the negative electrode external conductive member are respectively swage-fused to the other end of the positive and the negative electrode current collector plate; and an oxide layer is formed at a surface of each swage-fused area.

Abstract: A rechargeable battery including an electrode assembly including a positive electrode and a negative electrode formed on both surfaces of a separator; a case accommodating the electrode assembly; a cap plate closing an opening of one side of the case; and an electrode terminal installed to the cap plate, wherein the electrode terminal includes a first terminal part installed to a terminal hole of the cap plate, connected to the electrode assembly inside the case, and protruding outside the cap plate thereby forming a first connection portion, a second terminal part forming a second connection portion coupled to the first connection portion in a first direction determined along a length of the electrode terminal and protruding from the first terminal part, and a fastener coupling the first connection portion and the second connection portion in a second direction intersecting the first direction.

Abstract: A method for dismantling a device including at least one article at least partially embedded in a resin, the article including a body and a housing at least partially surrounding the body, the housing being at least partially in contact with the resin, wherein the method includes extracting the body from the housing, the housing remaining attached to the resin upon the extraction of the body.

Abstract: A battery box includes at least one battery and a switch apparatus. The switch apparatus includes a first conductor, a second conductor, and an operation element. The first conductor includes a first conductive portion and a first contact portion protruding from the first conductive portion. The second conductor includes a second conductive portion and a second contact portion protruding from the second conductive portion. The operation element is movable with respect to the housing and able to resist the second conductive portion along with the movement of the operation element. When the operation element is moved to resist the second conductive portion, the second contact portion contacts with the first contact portion, and when the operation element is moved to separate from the second conductive portion, the second contact portion does not contact with the first contact portion. An electronic device using the battery box is also provided.

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: A battery includes a cell element that is disposed in a housing, and the housing is sealed with a top cover made primarily of plastic. The top cover may include a layer of metallic foil, which may make the top cover more impermeable to moisture. The top cover may also include a vent, which may or may not utilize the metallic foil to determined the primary opening force of the vent. The top cover may also have one or more stiffening ribs that extend downwardly from a bottom portion of the top cover to contact the cell element, so as to limit movement of the cell element within the housing. In addition, the top cover may have one or more conductive terminals that are at least partially overmolded by the plastic of the top cover.

Abstract: An alkaline battery including a positive electrode of a hollow cylindrical shape disposed in contact with an inner surface of a bottomed cylindrical battery case, a gelled negative electrode, a separator, and an alkaline electrolyte. The separator includes a cylindrical separator disposed in contact with the inner side surface of the positive electrode, and a bottom separator covering an opening of the cylindrical separator in the bottom side of the battery case. The bottom of the battery case includes: an annular base portion for supporting the positive electrode; an annular intermediate portion provided inwardly of the base portion, for supporting the bottom separator; and a terminal portion protruding outwardly from the intermediate portion. The intermediate portion has an inclined surface on the inner bottom surface of the battery case, the inclined surface being inclined downwardly from the base portion toward the terminal portion.