Abstract: A solid-state battery including a solid-state battery laminate that includes at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer along a lamination direction, and defining: an overlapping part in which the positive electrode layer and the negative electrode layer overlap each other in the lamination direction, and a non-overlapping part in which the positive electrode layer and the negative electrode layer do not overlap each other in the lamination direction. At least one main surface having a normal in the lamination direction has a recess overlapping the overlapping part and defines a step between the overlapping part and the non-overlapping part or in the non-overlapping part.

Abstract: The disclosed technology relates to electrical feedthroughs for thin battery cells. A battery cell enclosure includes a terraced portion having a reduced thickness relative to another portion of the enclosure. The enclosure includes an opening disposed on a horizontal surface of the terraced portion for receiving the electrical feedthrough. Because the feedthrough is disposed on the horizontal surface of the terraced portion, the feedthrough may be over-sized thereby reducing the resistance and impedance of the feedthrough without increasing the height or thickness of the enclosure.

Abstract: A cover plate assembly, a battery, and a method for assembling a battery are provided. The cover plate assembly includes a cover plate, a pole, and an explosion-proof assembly. The cover plate includes a cover plate body and a carrier portion. The cover plate body is disposed around an external periphery of the carrier portion. The carrier portion is recessed from a first surface of the cover plate body. The carrier portion and the cover plate body cooperatively define a first recess communicating with a first through hole defined by the carrier portion. The pole is disposed in the first recess. The pole abuts against the carrier portion. The explosion-proof assembly includes an explosion-proof valve and a protective sheet. The explosion-proof valve and the protective sheet are disposed in a second through hole defined by the pole. The explosion-proof valve is spaced apart from the protective sheet.

Abstract: Systems, devices, and methods, for harvesting, storing, and using electricity from earth energy devices, particularly involving galvanic cells and antenna received energy. FIGS. 1 through 5 depict numerous technical features and embodiments for combination and utilization in said systems, devices, and methods.

Abstract: A secondary battery includes a battery case, an electrode body, and a collector member connecting the battery case and the electrode body. A positive electrode includes an insulation layer provided so as to be adjacent to a positive electrode active material layer. The collector members include first portions, and second portions continuous to the first portions and bent relative to the first portions. The first portions are fixed to the battery case. The second portions are connected, at ends thereof opposite to the bent portions, to collector regions, respectively. The collector members further include ribs connected, at the bent portions, to the first portions and the second portions, respectively.

Abstract: A rechargeable battery includes: a case accommodating an electrode assembly and having an opening; a cap assembly including a cap plate coupled to the case to cover the opening, and a terminal plate coupled to the cap plate; and a direction determining member covering the cap plate and coupled to the case to define an extended part.

Abstract: A rechargeable battery jump starting device and a rechargeable battery assembly for use in the portable rechargeable battery jump starting device. The portable rechargeable battery jump starting device maximizes the power conducted from the rechargeable battery assembly to a battery being jump started.

Abstract: A cell of an energy storage device with at least one electrode that is tabless, and methods of forming thereof, are described. The cell includes a first substrate having a first coating disposed thereon, wherein a second portion of the first substrate at a proximal end along the width of the first substrate comprises a conductive material. An inner separator is disposed over the first substrate. A second substrate is disposed over the inner separator. The second substrate has a second coating disposed thereon. The first substrate, the inner separator, and the second substrate in a successive manner, the first substrate, the inner separator, and the second substrate are rolled about a central axis.

Abstract: Provided is a rechargeable battery including an electrode assembly comprising an electrode assembly body and an electrode tab protruding from the electrode assembly body, and a connecting member comprising a guiding plate and a first connecting plate connected to the guiding plate. The guiding plate extends in a width direction and the first connecting plate extends away from a plate surface of the guiding plate along the width direction or extends toward the plate surface of the guiding plate along the width direction. The electrode tab has a stacked multi-layer structure, the electrode tab protrudes from a portion of an end surface of the electrode assembly body in a longitudinal direction at a side of a split of the electrode assembly body perpendicular to the width direction, and the electrode tab is bent with respect to a longitudinal direction and is connected to the first connecting plate.

Abstract: The present disclosure enables a decline in a joining force between an internal terminal and an external terminal to be suppressed even when a load is applied to a sealed battery from the outside. In a sealed battery disclosed herein, an external terminal includes a plate portion and a flange portion. The plate portion has a rectangular shape and includes an internal terminal joining portion that is joined to the internal terminal at one end of the plate portion in a lengthwise direction and an external device joining portion that is joined to an external device at another end of the plate portion in the lengthwise direction. The flange portion is arranged in at least one side edge portion of the plate portion in a transverse direction so as to rise approximately perpendicularly with respect to the plate portion.

Abstract: According to various embodiments of the present invention, an electronic device may comprise: a housing, which comprises a first plate, a second plate facing the opposite direction to the first plate, and a side surface member surrounding a space between the first plate and the second plate; a display viewed through at least a part of the first plate; a battery, which is disposed in the housing and comprises a battery cell comprising multiple cell parts, at least some of which are arranged to overlap each other when viewed from above one surface of the battery, and multiple conductive members arranged so as to overlap each other at the edges of the multiple cell parts when viewed from above the one surface; a battery protection circuit joined to the multiple conductive members; and a processor operationally connected to the display and the battery. Various other embodiments may also be possible.

Abstract: A lithium ion (Li-ion) battery module includes a module terminal configured to electrically couple the Li-ion battery module to an electrical connector of an external load. The module terminal includes a conductive component and a sealing shim secured to the conductive component, the sealing shim being formed from a polymeric material. The Li-ion battery module includes a housing containing a plurality of Li-ion battery cells and having an opening through which the conductive component of the module terminal at least partially protrudes. The sealing shim of the module terminal is directly secured to the housing and forms a seal isolating an interior of the housing from the external environment.

Abstract: Provided is a rectangular secondary cell enabling seal performance of a gasket to be improved with a simple structure without enlarging a shaft of a terminal. A rectangular secondary cell according to the present invention includes a cell can housing a winding group and having an opening portion, a lid provided with a positive electrode terminal electrically connected to the winding group and closing the opening portion, and a gasket having an interposed portion interposed between the lid and a lower surface of the positive electrode terminal. In the gasket, an external shape of the interposed portion is smaller than an external shape of the lower surface of the positive electrode terminal.

Abstract: Provided is a casing for a lithium metal secondary battery including: a battery casing material; at least one releasable capsule attached at least partially or totally to the inner surface of the casing material to cover the inner surface of the casing material; and a release solution supported in the releasable capsule, wherein the releasable capsule includes a capsule coating film and a capsule inner space surrounded with the capsule coating film, the release solution is supported in the capsule inner space, and the release solution includes a release agent and a solvent. A lithium metal secondary battery including the casing and a method for manufacturing the same are also provided. It is possible to increase releasability of the negative electrode in a lithium metal secondary battery and to improve nail safety by using the releasable capsule according to the present disclosure.

Abstract: A technique relating to a battery structure is disclosed. A base substrate and a battery layer having a support substrate are prepared. The battery layer includes a protection layer formed on the support substrate, a film battery element formed on the protection layer and an insulator covering the film battery element. The battery layer is placed onto the base substrate with the bottom of the support substrate facing up. The support substrate is then removed from the battery layer at least in part by etching while protecting the film battery element by the protection layer. A stacked battery structure including the base substrate and the two or more battery layers is also disclosed.

Abstract: A cell of an energy storage device with at least one electrode that is tabless, and methods of forming thereof, are described. The cell includes a first substrate having a first coating disposed thereon, wherein a second portion of the first substrate at a proximal end along the width of the first substrate comprises a conductive material. An inner separator is disposed over the first substrate. A second substrate is disposed over the inner separator. The second substrate has a second coating disposed thereon. The first substrate, the inner separator, and the second substrate in a successive manner, the first substrate, the inner separator, and the second substrate are rolled about a central axis.

Abstract: Provided is a rechargeable battery including an electrode assembly comprising an electrode assembly body and an electrode tab protruding from the electrode assembly body, and a connecting member comprising a guiding plate and a first connecting plate connected to the guiding plate. The guiding plate extends in a width direction and the first connecting plate extends away from a plate surface of the guiding plate along the width direction or extends toward the plate surface of the guiding plate along the width direction. The electrode tab has a stacked multi-layer structure, the electrode tab protrudes from a portion of an end surface of the electrode assembly body in a longitudinal direction at a side of a split of the electrode assembly body perpendicular to the width direction, and the electrode tab is bent with respect to a longitudinal direction and is connected to the first connecting plate.

Abstract: A battery module for a high-voltage battery of a motor vehicle has at least two battery cells, two pressure plates, between which the battery cells are arranged, and at least two tie rods, which are led along opposite side regions of the at least two battery cells and which are connected to the pressure plates, forming a cell module frame surrounding the battery cells and pressing the battery cells against one another. The tie rods are integrally connected to the respective side regions of the battery cells by an adhesive connection.

Abstract: Various embodiments of the present invention relate to a secondary battery. The technical problem to be solved is to provide the secondary battery which can improve the insulation strength of first and second multi-tabs, by forming the first and second multi-tabs of first and second electrode assemblies symmetrically with respect to each other, and also can improve the insulation strength of the first and second multi-tabs by forming an insulating layer on the first and second multi-tabs of the first and second electrode assemblies.

Abstract: A battery unit includes: an electrode assembly, including a main body portion, and a negative tab and a positive tab, which respectively extend out from both ends of the main body portion along the length direction; a negative terminal and a positive terminal, arranged at the top of the electrode assembly; a first current collector for electrically connecting the negative tab with the negative terminal; and a second current collector for electrically connecting the positive tab with the positive terminal. The first current collector includes a first guiding plate. The first guiding plate is of a flat plate structure, and the negative tab is bent to one side of the first guiding plate away from the main body portion and is connected with the first guiding plate.

Abstract: This disclosure presents a terminal (30) for a secondary cell (40). The terminal (30) comprises a terminal plate (20) comprising a through-hole (21) and an inner surface (23) adapted to face the interior of the secondary cell (40). The terminal (30) further comprises a terminal rivet (1) that extends through the through-hole (21) of the terminal plate (20). The terminal rivet (1) comprises a first flange (6) that comprises a protruding portion (7), and the protruding portion (7) extends into the inner surface (23) of the terminal plate (20) in a riveted state (1b). The disclosure also presents a terminal rivet (1).

Abstract: An impact-proofed battery includes a packaging film, an electrode assembly received in the packaging film, tabs extending from an end portion of the electrode assembly, and insulating layers. Each tab includes a connecting region, a packaging region, and an exposed region connected in the order written. The connecting region is electrically connected to the electrode assembly, and the exposed region is exposed from the packaging film. Each insulating layer includes a packaging portion and a protective portion connecting to the packaging portion. The packaging portion covers the packaging region and is between the packaging film and the packaging region. The protective portion is between the connecting region and the packaging film, and an area of the protective portion is greater than an area of the connecting region. The disclosure also provides a device using the battery.

Abstract: A negative electrode terminal includes a flange, and a connection portion disposed on a first surface of the flange. The connection portion is inserted into a terminal attachment hole. The negative electrode terminal includes a first area made of aluminium or an aluminium alloy, and a second area made of copper or a copper alloy. In the flange, the second area is disposed adjacent to the first surface, and the first area is disposed adjacent to the second surface. A boundary between the first area and the second area is disposed between the first surface and the second surface. A thinnest portion of the first area of the flange in the thickness direction of the flange has a thickness of larger than or equal to 0.3 mm. An external electroconductive member made of aluminium or an aluminium alloy is welded to the flange to form a welded portion.

Abstract: The present disclosure relates to a secondary battery, a battery module, and a device using the secondary battery as a power source. The secondary battery includes a casing and a top cover for connecting with the casing. The casing includes an end portion provided with an opening. The top cover is used to cover the opening of the casing. The top cover includes an inserting portion extending into the casing from the opening. A plurality of notches are provided on an inner side of the end portion of the casing or on a side wall of the inserting portion facing the casing. In the secondary battery, the battery module, and the device using the secondary battery as a power source according to the present disclosure, the secondary battery can reduce the possibility of short circuit occurring in the electrode assembly and improve the operational safety of the secondary battery.

Abstract: The disclosed technology relates to electrical feedthroughs for thin battery cells. A battery cell enclosure includes a terraced portion having a reduced thickness relative to another portion of the enclosure. The enclosure includes an opening disposed on a horizontal surface of the terraced portion for receiving the electrical feedthrough. Because the feedthrough is disposed on the horizontal surface of the terraced portion, the feedthrough may be over-sized thereby reducing the resistance and impedance of the feedthrough without increasing the height or thickness of the enclosure.

Abstract: Electric vehicle battery packs with external side enclosures for containing electrical connectors and other components therein. Each enclosure is sized to support various connectors or other components as desired, and may have a number of openings formed to provide interfaces for connecting various electric vehicle systems to the battery pack. The enclosures may be placed at various locations along one or more sides of the battery pack, and connectors may be routed over an upper surface of a battery pack frame or through a gap formed between the pack frame and cover. Enclosures may be made of any material, including plastic for lower weight applications and metal for improved electromagnetic interference shielding.

Abstract: Disclosed herein is A battery pack comprising: a pack housing; a base plate; at least two battery modules arranged such that the battery modules are located in a space defined between the pack housing and the base plate, each battery module including a plurality of battery cells or unit modules which can be charged and discharged; a first wall located at a first side of the base plate; a second wall located at a second side of the base plate; an external input terminal and an external output terminal are located at both of the first wall and the second wall, the battery modules being connected to the external input and output terminals in a state in which the battery modules are electrically connected in series or in parallel to each other; and a capacitor is present at the first or second wall adjacent to a corresponding one of the external input and output terminals, the capacitor being electrically connected to said corresponding one of the external input and output terminals.

Abstract: The present disclosure relates to a rechargeable battery including: an electrode assembly including a first electrode, a second electrode, and a separation layer interposed between the first electrode and the second electrode, a first electrode tab electrically connected to the first electrode, a second electrode tab electrically connected to the second electrode, and a first exterior member and a second exterior member receiving the electrode assembly and disposed to face each other, wherein at least one of the first exterior member and the second exterior member includes at least one of a first draw-out unit drawing out the first electrode tab and a second draw-out unit drawing out the second electrode tab, and a display device including the same.

Abstract: A rechargeable battery and a battery module are provided. According to embodiments, a rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator; a case accommodating the electrode assembly therein and including an open side; a cap plate coupled to the open side of the case; and a terminal portion arranged on the cap plate to be electrically connected to the electrode assembly, and the terminal portion is slidable in a direction on the cap plate.

Abstract: A battery module according to an embodiment of the present invention includes: a plurality of unit cells, each including a case and an electrode terminal protruding from the case; and a bus bar which electrically connects any pair of unit cells among the plurality of unit cells, and the bus bar includes: a terminal coupler which is inserted between respective electrode terminals of the pair of unit cells; and a case coupler which is inserted between respective cases of the pair of unit cells.

Abstract: Battery systems containing recyclable battery portions. The present disclosure includes disclosure of a battery system, comprising a housing configured to retain two or more battery portions; two or more battery portions configured to fit within the housing; wherein the housing is configured to fit within a battery compartment of a cart; wherein the two or more battery portions, when effectively connected together using a central connector of the battery system, collectively produce sufficient power to power electronic equipment of the cart; and wherein each of the two or more battery portions weigh at or below a desired threshold weight.

Abstract: A method of forming a package is provided and includes providing two laminate edge portions of the package, each of which includes a foil layer between first and second resin layers; and welding together the respective first resin layers at a first position spaced apart from the edges while not welding the respective first resin layers at the edges, wherein the edge portions include edges from which electrode terminals extend such that portions of the electrode terminals are exposed beyond the edges, and wherein the edge portions are between a sealing portion and exposed portions of positive and negative electrode terminals.

Abstract: The invention relates to a battery cell (2), in particular a prismatic lithium ion cell, the battery cell (2) comprising an electrode assembly (4), a battery case (6) for housing the electrode assembly (4) and a cap assembly (S) for closing the battery case (6), the cap assembly (S) comprising a set of terminals (10) arranged thereon, wherein the electrode assembly (4) comprises first electrode plates (14), separator plates and second electrode plates (16) stacked on one another, wherein electrode tabs (12) are provided to electrically connect the electrode assembly (4) with the terminals (10). The electrode tabs (12) are bent at least once in a direction normal to the first and second electrode plates (14, 6). Furthermore, the invention relates to a method of manufacturing a battery cell (2).

Abstract: A secondary battery, a battery pack and a device using the battery are provided, wherein the end cover assembly includes: an end cover with a through hole for injection of electrolyte and an accommodating part, the accommodating part is arranged on a side far away from a shell of the end cover and is arranged along a circumferential direction of the through hole; a sealing element; and a cover body for covering at least part of the sealing element, the cover body is rotatable and includes a limiting part; when the cover body rotates to a first position, the limiting part is located inside the accommodating part to limit separation of the cover body from the end cover; when the cover body rotates to a second position, the limiting part and the accommodating part are misplaced to realize separation of the cover body from the end cover.

Abstract: A battery according to an embodiment may comprise an electrode assembly, said electrode assembly comprising an electrode substrate comprising a first area and a second area; an active material deposited on the first area of the electrode substrate; and an electrode tab attached to the second area of the electrode substrate, wherein the electrode tab comprises a bonding surface having at least one protrusion making contacting with a bonding location of the second area of the electrode substrate, wherein a surface opposite to the bonding surface and a surface opposite the bonding location are substantially flat.

Abstract: The present disclosure relates to a secondary battery and a manufacturing method of the secondary battery, and the secondary battery includes a case; an electrode assembly, accommodated in the case and including a main body and a tab connected to the main body; a cap plate, coupled to the case; an electrode terminal, located on an outer side of the cap plate and provided with a through hole; and a current collecting member, including an extending portion and a connecting portion connected to the extending portion, wherein the connecting portion is located on an inner side of the cap plate and is directly connected to the tab, and the extending portion is adapted to extend toward the electrode terminal and protrude into the through hole, and is connected to the electrode terminal. The configuration of the secondary battery of the present disclosure is conducive to improving an energy density.

Abstract: A feedthrough that forms a terminal for a metal-ion electrochemical accumulator, provided through an aperture opening out on either side of a wall including two opposite faces. The includes feedthrough an electrically conductive male part, and a female part made of an aluminum-based alloy. A portion of the male part is tight-fitted into a blind hole of the female part.

Abstract: In this non-aqueous electrolyte secondary battery, a positive terminal and a negative terminal extend in a first direction, protrude from a laminated cell stack, and are provided so that a center line is interposed therebetween, the center line passing through a midpoint of both ends of the laminated cell stack in a second direction orthogonal to the first direction and extending in the first direction when the laminated cell stack is seen in plan view, and a first terminal with higher heat dissipation efficiency among the positive terminal and the negative terminal is provided in a location closer to the center line than a location of a second terminal with lower heat dissipation efficiency among the positive terminal and the negative terminal.

Abstract: A method of manufacturing a secondary battery including an electrode body including a positive electrode plate and a negative electrode plate, an outer package including an opening and housing the electrode body, a sealing plate sealing the opening, a negative electrode terminal attached to the sealing plate, a negative electrode tab portion provided in the negative electrode plate, and a negative electrode collector electrically connecting the negative electrode tab portion and the negative electrode terminal to each other, the method including welding a flange portion of the negative electrode terminal and the negative electrode collector together by projecting an energy ray, the negative electrode collector includes, before the welding, a rough surface portion, and in the welding, the flange portion of the negative electrode terminal and the negative electrode collector are connected by welding by projecting an energy ray onto the rough surface portion.

Abstract: A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly including a first electrode, a second electrode, and a separator that is disposed between the first electrode and the second electrode; a case where the electrode assembly is embedded; a cap plate that is coupled to an opening of the case; and a first electrode terminal provided on an upper side of the cap plate and having a first plate terminal that is electrically connected with the cap plate through a fuse portion and a second electrode terminal provided on the upper side of the cap plate and that is electrically connected with the second electrode by penetrating through the cap plate.

Abstract: An electricity storage apparatus 100 may include: an electrode assembly 3 including a positive electrode and a negative electrode; a tab 9 including one end which is electrically connected to the electrode assembly 3; and a conductive member 20 disposed above the electrode assembly 3, and electrically connected to the tab 9. The tab 9 may include a first bent part 14 provided in a vicinity of the one end of the tab 9, a second bent part 16 provided in a vicinity of another end of the tab 9, and a joining part 18 provided between the first bent part 14 and the second bent part 16 and joined to the conductive member 20. The second bent part 16 may be bent so that the other end of the tab 9 is disposed above the conductive member 20.

Abstract: Provided herein are a battery cell of a battery pack for electric vehicles. A housing for the battery cell can have a body and a head region. The body region can include an electrolyte, anode, and cathode. The battery cell can include a first sealing element disposed in an opening of the head region. The first sealing element can define two slots for disposing a second sealing element and a third sealing element respectively. A first conductive contact for a positive terminal coupled to the cathode can be disposed in the second sealing element. A second conductive contact for a negative terminal coupled to the anode can be disposed in the third sealing element. A first protector element disposed below the second sealing element can react to a first failure condition. A second protector element disposed below the third sealing element can react to a second failure condition.

Abstract: An electricity storage apparatus 100 may include: an electrode assembly 3 including a positive electrode and a negative electrode; a tab 9 including one end which is electrically connected to the electrode assembly 3; and a conductive member 20 disposed above the electrode assembly 3, and electrically connected to the tab 9. The tab 9 may include a first bent part 14 provided in a vicinity of the one end of the tab 9, a second bent part 16 provided in a vicinity of another end of the tab 9, and a joining part 18 provided between the first bent part 14 and the second bent part 16 and joined to the conductive member 20. The second bent part 16 may be bent so that the other end of the tab 9 is disposed above the conductive member 20.

Abstract: Provided are an electrode for a secondary battery and a manufacturing method thereof. According to the present invention, a secondary battery, which has high capacity and is also able to get an excellent evaluation in a nail penetration test so that stability is ensured, may be manufactured. In order to accomplish the above objectives, the present invention provides an electrode for a secondary battery which includes an electrode current collector; a first electrode active material layer formed on the electrode current collector; and a second electrode active material layer formed on the first electrode active material layer, wherein a layer composed of the electrode current collector and the first electrode active material layer has a tensile strain of 1.2% or less.

Abstract: A battery pack includes a two-dimensional or three-dimensional array of battery cells, each cell having a polygonal (i.e, rectangular) shape and a “three side-and-one side” terminal configuration. In some embodiments, the terminal configuration allows the cells to be electrically connected in any configuration, series, parallel, or series parallel simply by changing the orientation of the cell relative to adjacent cells and applying pressure to maintain contact. For a rectangular cell shape, this is achieved by providing three like charged terminals (such as positive) on three respective sides of the cell and one oppositely charged terminal (such as negative) on a fourth side of the cell while maintaining a neutral charge on both of the end surfaces of the cell.

Abstract: The present application relates to a secondary battery, including a naked battery core and a secondary battery head cover assembly. The secondary battery head cover assembly includes a head cover and an insulation structure. The insulation structure includes a top connection sheet and two naked battery core insulation sheets, and the two naked battery core insulation sheets are connected to two long sides of the top connection sheet, respectively. The top connection sheet is located below the head cover. The naked battery core is located below the top connection sheet. The head cover is provided with an explosion-proof valve, the top connection sheet is provided with an explosion-proof valve air hole, and the explosion-proof valve air hole is provided correspondingly below the explosion-proof valve.

Abstract: The present disclosure relates to a cap assembly and a power battery. The cap assembly comprises a cap plate including a top surface, a bottom surface opposed to the top surface in a thickness direction and a liquid injection hole penetrating through the cap plate from the top surface to the bottom surface, the liquid injection hole having an inlet provided on the top surface and an outlet provided on the bottom surface; and a blocking member provided on the bottom surface, a projection of the blocking member in the thickness direction at least partially covers the outlet, wherein a fluid channel is formed between the blocking member and the cap plate, and the fluid channel communicates with the outlet of the liquid injection hole. The cap assembly can be applied to the power battery.

Abstract: Provided is a plate-shaped battery cell in which electrode leads are located at one side end portion of a battery case including an excess sealing portion of a thermally-welded or adhesive structure for sealing an electrode assembly.

Abstract: Disclosed herein is an electronic device including a substrate, with an active layer stack on the substrate. A cover is on the active layer stack and has a surface area greater than that of the active layer so as to encapsulate the active layer stack. A conductive pad layer is on the cover. At least one conductive via extends between the active layer stack and the conductive pad layer.

Abstract: A method for manufacturing a secondary battery having a film package by covering upper and lower sides of a laminate structure constituting a battery with a pair of film materials respectively and bonding the film materials together sequentially in a process direction from one end of the film materials to the other, the method including overlapping the film materials such that the laminate structure is sandwiched therebetween, and sealing one end of the overlapping part of the films, the one end being located at an upstream of the process direction, and bonding the overlapped film materials together at one or each of side portions thereof extending along the process direction sequentially in the process direction, while pressing a middle portion of the overlapped film materials sequentially in the process direction to thereby degas an internal space between the film materials, the middle portion being located between the side portions.