TW201929292A - Battery casing, film packaging battery, and methods for manufacture thereof - Google Patents

Abstract

The present invention provides a battery casing, a film packaging battery using the same, and methods for manufacture thereof. The present invention relates to a battery casing having a casing body formed from a laminated film having a metal foil and a welding layer, wherein the peripheral walls of the casing body are walls in which the wall surfaces, which rise up from a square-shaped bottom section by being folded, are joined by a top surface being welded to a resin molded body, which becomes a lid material welding surface.

Description

Battery container, film-packed battery, and manufacturing method thereof

The present invention relates to a battery container, a film-packed battery, and a method of manufacturing the same.

Conventionally, as a battery container containing battery elements (all charging / discharging elements including an electrolyte) such as a lithium ion secondary battery or an electric double-layer capacitor, a metal container having excellent water vapor transmission resistance has been used in many cases. However, metal containers are heavy, bulky, packaging engineering is complicated, and productivity is not high. In particular, the welding of the container main body and the lid requires a large number of man-hours, and there are problems from the viewpoint of mass productivity. In addition, for lithium batteries for electric vehicles, etc., since the number of vehicles is large, it is desirable that the containers are light and compact.
In response to these requirements, a pouch type has been developed in which a laminated body composed of a base material layer, a metal foil such as aluminum, and a sealant layer is formed into a pouch shape, or the laminated body is pressure-molded to form a recessed portion and a lithium ion battery body A film-packed battery such as a concave-convex type (also referred to as a “stretch processing type”) stored in the recess (for example, Patent Documents 1 to 2).
Stretch-processed battery containers can also accommodate slightly thicker battery elements, and have the advantages of easy filling and packaging of battery elements, high volumetric efficiency (ratio of volume to the overall volume of the battery container), and easy realization Lightweight and low cost.
[Antecedent Patent Literature]
[Patent Literature]

Patent Document 1: Japanese Patent Application Laid-Open No. 2002-216713 Patent Document 2: Japanese Patent Application Laid-Open No. 2010-262932

[Problems to be Solved by the Invention]

However, as described in Patent Documents 1 and 2 for stretch-processed battery containers, when a slip agent or a flowing paraffin layer is used, the smoothness of the surface of the mold and the packaging material is improved, and the surface can be drawn deeper. Stretch processing. However, even if the stretchability is improved, since the metal foil is stretched into a three-dimensional shape, there is a limit to the depth of stretching. As the depth of the stretch-molded container, about 10 mm is the upper limit. Therefore, there is a problem that a large-capacity thick battery element cannot be accommodated.
In addition, since the corners are particularly strongly stretched, the metal foil becomes thin, or a plurality of pinholes are generated in the metal foil. If moisture enters through a thin portion or pinhole of the metal foil, it will react with the electrolyte and generate hydrofluoric acid. Therefore, there are problems such as deterioration of the welded portion of the electrode member and leakage of the electrolytic solution.
[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a battery container, a thin-film-packed battery using the battery container, and a method for manufacturing such a high-efficiency item. Regarding the battery container, filling and packaging of battery elements is easy, It can be designed to an arbitrary thickness so that it can be light-weighted and have a high volumetric efficiency similar to a stretch-processed battery container, and can easily accommodate even a large-capacity thick battery element.

The present invention provides the following battery containers.
(1) A battery container having a container body formed of a laminated film having a metal foil and a welding layer, wherein the peripheral wall of the container body is welded to a top wall surface bent and raised from the bottom The surfaces are connected to form a resin molded body on which the cover material is welded.
(2) The battery container according to item 1 of the scope of patent application, wherein the resin molded body is a plate body, and a side surface of the plate body becomes a cover material welding surface.
(3) The battery container according to the item (2), wherein the resin molded body is a plate body having extension portions for welding the wall surface at both ends.
(4) The battery container according to the item (1), wherein the resin molded body is a frame body, and a top surface of the frame body becomes a cover material welding surface.

The present invention provides the following method for manufacturing a battery container.
(5) The method for manufacturing a battery container according to any one of points (1) to (3), wherein the method for manufacturing a battery container is characterized by having the following process: a resin plate welding process, which will be performed by The long resin plates that are divided into a plurality of the resin molded bodies are welded to the welding layers on both sides of the long laminated film; the plate body is cut out, and the resin plates and The laminated film is cut out to cut out the resin molded body: the resin plates are retained as a plurality of the resin molded bodies on both sides of the long laminated film, and the adjacent resin The laminated film has a length longer than the length of the two surfaces of the resin molded body facing each other, which are welded to each other; the side wall forming process will retain the resin molded body. The laminated film is bent so that the resin molded bodies on both sides face each other to stand up, and the laminated film in contact with the lower end of the resin molded body is welded to the resin molded body to form a side wall; and a wall surface; Connection process, the laminated film The portion where the cutout is formed is bent from the root of the resin molded body to stand up, and is welded together with the resin molded body to be welded, and the wall surface of the container body is connected to form a peripheral wall of the container body.
(6) The method for manufacturing a battery container according to any one of the points (1) to (4), wherein the method for manufacturing a battery container is characterized by having the following processes: a film removal process, and a long strip The two sides of the laminated film are based on the width of the main surface of the resin molded body, and a plurality of portions serving as the bottom portion of the container body are retained with respect to each other. The laminated film having a length of a portion of two faces of the resin molded body facing each other is cut away, and a plurality of side edges of the laminated film welded to the resin molded body are freed. A cutout is provided so as to expand outward from a portion that becomes the bottom of the container body; a resin molding welding process is performed such that an angle of an outer peripheral surface of the resin molded body and the laminated film become the container body. The four corners of the bottom portion are arranged in a consistent manner, and the resin molded body is welded to the welded layer of the laminated film; and a wall surface connection process is performed to remove the portion of the laminated film in which the cutout and the free end are located. The resin molded body is bent to cause them to stand upright, are welded to the resin molded body, are welded, and are connected to the wall surface of the container body to form a peripheral wall of the container body.
(7) The method for manufacturing a battery container according to the item (5) or (6), wherein the method for manufacturing a battery container further includes an electrode lead-out portion provided with an opening on the long laminated film. Opening works.

Moreover, this invention provides the following film-packed batteries.
(8) A film-packed battery is a film-packed battery using the battery container according to any one of points (1) to (4), wherein a battery element is housed in the container body and sealed with a cover material.

In addition, the present invention provides the following method for manufacturing a thin film packaged battery.
(9) A method of manufacturing a thin film packaged battery, which is a method of manufacturing a film packaged battery using the method of manufacturing a battery container according to any one of points (5) to (7), wherein The manufacturing method includes the following processes in order: a battery element storage process, which stores battery elements in a battery container formed in the wall surface connection process; and a sealing process, which welds a lid material to an opening portion of the battery container.
[Inventive effect]

According to the battery container and the film-packed battery of the present invention, the bottom and the peripheral wall of the battery container body are made of a laminated film containing a thin metal foil, similar to a stretch-processed battery container. Therefore, the battery container has high barrier properties and a high weight. Light weight and high volumetric efficiency. Moreover, unlike a stretch-processed battery container, the peripheral wall is connected by a resin molded body, and therefore, it has excellent shape retention. In addition, bending a laminated film containing a metal foil only by a folding line does not stretch into a three-dimensional shape. Therefore, even if the metal foil is thin, cracks or a large number of pinholes do not occur in the metal foil. Thereby, since the depth of the battery container body can be freely designed, even a thick battery element having a large capacity can be easily stored. In addition, even if a current-use metal foil with low stretchability that cannot be used in a stretch-processed container if the thickness is reduced is used, or a laminate of a metal foil that is not suitable for stretch processing due to low stretchability is used. The film can also be used freely.
In addition, since the resin molded body has a cover material welding surface, at least two opposite sides of the film-packed battery can be fused to the resin molded body and sealed. Therefore, since the welding portion of the cover material does not protrude to the outside of the battery container, the battery becomes compact, and when a plurality of batteries are used in a group, the volume of the aggregate can be reduced. In addition, the workability when storing or collecting a plurality of batteries is also excellent.
According to the method for manufacturing a battery container and a film-packed battery of the present invention, a plurality of battery container bodies are formed using a long laminated film. Thereby, a battery container or a film-packed battery can be continuously manufactured while winding a laminated film wound on a roll, a core roll, a shaft roll, or a laminated film to which a resin molded body is fused, and thus has high production efficiency.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
The battery container 10 of the present embodiment shown in FIG. 1 accommodates the battery element 5 and becomes a film-packed battery 20 of the present embodiment shown in FIG. 2. The film-packed battery 20 of this embodiment is a secondary battery, an electric double-layer capacitor, or the like.

The film-packed battery 20 of this embodiment contains a battery element 5 inside the battery container 10. The battery element 5 includes a positive plate, a negative plate, a separator, and an electrolyte. The battery element 5 is a battery element including all elements necessary for charging / discharging including an electrolyte.
In the film-packed battery 20 of this embodiment, the positive electrode lead and the negative electrode lead electrically connected to the positive and negative electrode plates protrude from the battery container 10 in directions opposite to each other. The lead is mounted on the electrode plate and is electrically connected to the electrode plate.
As the separator, a porous film made of a thermoplastic resin such as polyolefin, a non-woven fabric, or a woven fabric, such as a sheet-like member capable of being impregnated with an electrolytic solution, is used.

The battery container 10 shown in FIGS. 1 (a) to (c) includes a container body 4 which is composed of a laminated film 1 having a metal foil and a welding layer. In the battery container 10, a resin molded body 2 is welded to the welding layers of a pair of opposing side surfaces of the container body 4. The battery container 10 includes a bottom portion 41 formed in a rectangular shape in plan view, a pair of end walls 42 and 42 and side walls 43 and 43 standing up from the end edges of the bottom portion 41, and a plate-shaped resin molded body 2 fused to the side wall 43. And a lead holding portion 44 protruding outward from an end portion of the end wall 42.
The film-packed battery 20 shown in FIG. 2 contains the battery element 5 in the battery container 10, and the cover material 3 is hermetically sealed. The lid member 3 is fused to the lid member welding surface of the resin molded body 2 and the lead holding portion 44 at the opening of the container body 4. The lead is sandwiched by the lead holding portion 44 and the cover material 3.

Regarding the peripheral wall of the container main body 4, the end walls 42, 42 and the side walls 43, 43 are bent by a fold line made of a straight line to rise from the four-square bottom 41, and are connected at the ends of the resin molded body 2 to form the container main body 4. Perimeter wall. The container body 4 is formed of a laminated film 1 in which a portion of the peripheral wall rising from the bottom portion 41 is bent by a fold line made of a straight line having no bent portion, and therefore, it is not necessary to stretch the metal foil into a three-dimensional shape.
Therefore, the depth of the container main body 4 is not limited, and there is no case where the corner portion is particularly strongly stretched to cause thinning of the metal foil, or cracks or a large number of pinholes in the metal foil.

The laminated film 1 forming the container body 4 is a laminated film in which a metal foil and an innermost layer of a welded layer made of a thermoplastic resin are laminated.
In this embodiment, the laminated film 1 has a welding layer only on one side. The welding layer of the laminated film 1 is the innermost layer of the container body 4.
In the laminated film 1 used in this embodiment, a protective layer made of a resin is laminated on the side of the metal foil opposite to the welding layer.
The protective layer can prevent the metal foil from being corroded by moisture or the electrolyte, or the metal foil coming into contact with other objects and causing damage. The protective layer is preferably formed of a thermoplastic resin or a thermosetting resin having a higher melting point than the fusion layer.

Specific examples of the laminated film 1 include a laminated film obtained by laminating a polyester film such as polyethylene terephthalate or polybutylene naphthalate, or 6 nylon or 66 A protective layer made of resin such as polyamide, nylon, metal foil such as stainless steel or aluminum, and a welded layer made of polyolefin such as polyethylene or polypropylene.
The protective layer is preferably biaxially stretched to increase heat resistance and strength, but a plurality of layers may be laminated.
For the lamination of each layer, a conventional method such as dry lamination, extrusion lamination, or thermocompression lamination can be adopted.

The metal foil of the laminated film 1 functions as a barrier layer that provides the laminated film 1 with a gas-barrier property against oxygen, water vapor, or the like. Examples of the metal foil include aluminum foil, aluminum alloy foil, stainless steel foil, iron foil, copper foil, and lead foil.
Among these metal foils, an aluminum foil or an aluminum alloy foil is preferably used because of a small specific gravity and factors excellent in ductility (easy extensibility) and thermal conductivity. If the thermal conductivity is excellent, the heat dissipation property when the battery element generates heat can be improved. If consideration is given to ensuring barrier properties or processing adaptability and other factors, the thickness of the aluminum foil is preferably in the range of 6 μm to 200 μm. If the thickness of the aluminum foil is less than 6 μm, there are cases where many pinholes are generated and the barrier properties are lowered.

In addition, compared with aluminum foil, stainless steel foil is inferior in thermal conductivity, but its tensile strength and corrosion resistance are high. For a metal foil with high corrosion resistance, it is preferred that the container body 4 is not easily corroded even if the welding layer inward of the metal foil is broken and comes into contact with the electrolyte filled in the battery container 10, and the gas barrier property is maintained . When a stainless steel foil is used, austenite such as SUS304 or SUS316, which is excellent in corrosion resistance, is preferably used, and SUS316 is more preferably used. The thickness range of the stainless steel foil is preferably set to 10 μm to 150 μm. If the thickness of the stainless steel foil is less than 10 μm, many pinholes are generated, and the barrier properties are reduced. In addition, if the thickness of the stainless steel foil exceeds 150 μm, the rigidity increases and it becomes difficult to process.

Examples of the resin used in the fusion-bonding layer of the laminated film 1 include high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear polyethylene, ethylene-acrylic acid copolymer, and ethylene-methacrylic acid copolymer. Polymers, ethylene-ethyl acrylate copolymers, ethylene-methyl acrylate copolymers, ionomers, ethylene-vinyl acetate copolymers, and polyethylene (PE) resins such as carboxylic acid-modified polyethylene or propylene. Polymers, propylene-ethylene random copolymers, ethylene-propylene block copolymers, propylene-α-olefin block copolymers, and polyolefins such as polypropylene (PP) resins such as carboxylic acid-modified polypropylene.

As shown in FIG. 2, in this embodiment, as the cover material 3, another member having the same laminated structure as the laminated film 1 is used. The cover material 3 may be integrated with the laminated film 1 and a part thereof may be folded.
If the cover material 3 and the laminated film 1 are integrated, the ridge line on the top surface of the container body 4 formed by folding the laminated film 1 is covered by the laminated film 1. Therefore, even if the resin molded body 2 has a thin plate shape, it has a barrier property. The reduction is also small and better. Moreover, it is preferable that the ridge line of the container body 4 which is formed by folding the laminated film 1 to face the ridge line of the top surface is also covered by the laminated film 1. In this case, it is preferable to increase the width of the laminated film 1 and also provide a welding layer on the outer surface of the laminated film 1 to weld and fix the lid material 3 beyond the outer surface of the side wall 43 of the container body 4.

In this embodiment, the cover material 3 is another member having the same width as the laminated film 1. In this case, although the ridge line on the top surface of the container main body 4 is not covered by the cover material 3, the reduction in barrier properties is generally small due to the thickness of the resin molded body 2.
When the ridge line of the top surface of the container body 4 is covered with the cover material 3, it is preferable to make the width of the cover material 3 wider than the width of the container body 4 so as to cover the entire upper end surface of the resin molded body 2. Welding. Therefore, even if the resin molded body 2 is in a thin plate shape, the decrease in the barrier properties is small, which is preferable. In this case, it is preferable to provide a welding layer also on the outer surface of the laminated film 1, and to weld and fix the overhanging cover material 3 to the outer surface of the side wall 43 of the container body 4.

When the laminated structure of the cover material 3 is different from the laminated film 1, a laminated film having a metal foil and a fusion layer is preferred. However, when a thick resin plate having a barrier property close to that of metal foil is used, the metal foil may not be required.
When the cover material 3 is a laminated film having a metal foil and a fusion layer, a structure in which the same protective layer as the laminated film 1 is laminated is preferable.

Regarding the battery container 10 of this embodiment, as shown in FIGS. 1 (a) and 1 (c), the inner surface of the side walls 43, 43 on both sides of the container body 4 is fused to each other with the side wall 43 facing each other. Resin molded bodies 2 and 2 with the same length of the cover material welding surface. The resin molded body 2 has the same width as the side wall 43.
In this embodiment, the resin molded body 2 is formed in a plate shape and has a side end surface (hereinafter referred to as a lower end surface on the bottom portion 41 side of the container body 4, an upper end surface on the opening portion side serving as a cover material welding surface, and both ends in the longitudinal direction. (In some cases, the "resin molded body 2" is referred to as "plate body 2").

The main surface of the plate body 2 is fused to the side wall 43, the end surface in the longitudinal direction, that is, the side end surface is fused to the end wall 42, and the lower end surface is fused to the bottom portion 41. The upper end surface of the plate body 2 is a welding surface which is welded to the cover material 3. The plate body 2 need not have a plate shape as long as it has these welding surfaces. For example, the central portion of the plate body 2 may be a hollowed-out frame, or a bridge shape such as a bridge pier and a deck of two or more bridges.
In addition, in this specification, a "main surface" means the largest surface among a some surface.

As the resin forming the resin molded body 2, a resin that can be fused to the fusion layer of the laminated film 1 can be used. The resin is preferably the same resin as that of the fusion layer of the laminated film 1, but as long as it can be welded to the fusion layer of the laminated film 1, a resin different from the resin of the fusion layer of the laminated film 1 may be used.
The thickness of the resin molded body 2 is preferably 2 to 5 mm. When the thickness of the resin molded body 2 is 2 mm or more, the welding strength with which the end wall 42 and the cover material 3 are welded is excellent. In addition, even if the connecting portion of the end wall 42 and the side wall 43 is not covered by the laminated film 1, the reduction in the barrier properties is small due to the thickness of the plate body 2. Even if the thickness of the resin molded body 2 is 5 mm or more, further improvement in welding strength or barrier properties cannot be expected, and the volumetric efficiency of the battery container 10 decreases.

In this embodiment, the end wall 42 of the container body 4 shown in FIG. 1 (a) is not reinforced by a resin plate, and is substantially composed of a laminated film 1. However, both ends of the end wall 42 are welded to the side end surfaces of the plate body 2. As a result, the end wall 42 of the container body 4 is fixed and connected to the side end of the plate body 2 in a state close to the side wall 43 to form a peripheral wall of the main body container 4. In addition, the shape retaining property of the opposite end wall 42 achieved by the side ends of the plate body 2 is enhanced.
The end wall 42 and the side wall 43 of the container body 4 are connected in a close state. However, due to the thickness of the plate body 2, the reduction in barrier properties at the ridge line of the connection portion is small.

The lead holding portion 44 of the container body 4 is formed by bending the laminated film 1 horizontally at the upper end of the end wall 42 and protruding to the outside of the container body 4.
As shown in FIG. 2, the cover material 3 is welded to the upper end surface of the plate body 2, that is, the cover material welding surface and the lead holding portion 44 of the container body 4 to hold the lead and block the opening of the container body 4.

As an example of a method of manufacturing the battery container 10 of the present invention, an example of the independent container body 4 will be described with reference to FIGS. 3 to 5.
First, as shown in FIG. 3, a resin plate 21 having the same width and thickness as the plate body 2 is welded to the welding layers on both sides of the laminated film 1 as the side wall 43 of the container body 4. At the time of welding, the both edges of the resin plate 21 and the laminated film 1 are aligned.
In this embodiment, the resin plate 21 is welded over the entire side of the laminated film 1. However, as long as the length of the plate body 2 can be ensured, the welding may be performed only on a part of the side. In addition, the portion to be welded to form the plate body 2 may be a cover material welding surface and both end faces capable of fixing the upper end, and therefore, may be the entire main surface of the plate body 2 or only the peripheral edge.

When the resin plate 21 is welded, it is preferable to weld from the laminated film 1 side by a known method such as ultrasonic sealing or heat sealing. Alternatively, the laminated film 1 may be loaded into a mold, and the resin plate 21 may be injection-molded onto the fusion-bonded layers on both sides thereof. When the laminated film 1 is produced, the fusion-bonded layer and the resin plate 21 may be extrusion-shaped and laminated on the film laminated with the metal foil.
In addition, instead of using the resin plate 21, the plate body 2 may be directly formed by injection molding, and the plate body 2 may be welded to the portions of the laminated film 1 that become the side walls 43, 43 in a mold. In this case, it is preferable to form a cross shape in advance: the portion serving as the bottom portion 41 is retained and the four corners of the laminated film 1 are cut to form portions of the end walls 42, 42 and the lead holding portions 44, 44, And the part which becomes the side wall 43, 43 is reserved as a free end. Further, the four corners of the laminated film 1 may be cut after the plate body 2 is welded.
In addition, in this specification, "free end" means the end part which can move freely.

In this embodiment, as shown in FIG. 4, the four corners of the laminated film 1 are cut by the width of the main surface of the resin plate 21, and the plate body 2 is cut out from the resin plate 21. The resin plate 21 becomes the plate body 2 by cutting out from the resin plate 21 so that the size of the main surface of the plate body 2 matches the size of the side wall 43 of the container body 4. Therefore, the side end surface of the plate body 2 is formed from the cut surface at this time.
As a method for cutting the sides of the resin plate 21 and the laminated film 1, a method in which the sides of the resin plate 21 and the laminated film 1 are punched out together with a punching die, or cutting using laser light may be used. Break and so on.
The punching using a punching die is suitable in that the resin plate 21 can be cut out in a short time by a simple device.

As shown in FIG. 4, if the resin plate 21 and the sides of the laminated film 1 are cut together, a portion where the plate body 2 is fused and two free ends where the plate body 2 does not exist are left on the laminated film 1. . These free ends are portions that become the end wall 42 and the lead holding portion 44.
Then, as shown in FIG. 5, the plate body 2 fused to the laminated film 1 is bent so as to stand above the laminated film 1, and then the lower end surface of the plate body 2 and the laminated film 1 are faced from the laminated film 1 side. Welding is performed to fix them.

Next, the two free ends of the laminated film 1 are bent from the root of the resin molded body 2 to be closely adhered to the both end surfaces of the plate bodies 2 and 2, and welded from the laminated film 1 side. As a result, the end wall 42 and the side wall 43 of the container body 4 are fixed to the plate body 2 in close proximity, and the wall surfaces of the container body 4 are connected to complete the peripheral wall.
Then, the free end protruding from the end wall 42 is horizontally bent outward to form a lead holding portion 44, thereby obtaining the battery container 10 of the present embodiment shown in FIGS. 1 (a) and (b).
The formation of the lead holding portion 44 may be performed simultaneously with the formation of the end wall 42.

The battery element 5 was put into the obtained battery container 10, the cover material 3 was placed in the opening portion, and the cover material 3 was welded to both the upper end surface of the plate body 2 and the lead holding portion 44 of the battery container 10. In this way, the lead wires are clamped by the cover material 3 and the lead wire clamping portion 44, and the opening portion of the battery container 10 is blocked, thereby obtaining the film-packed battery 20 of the present embodiment shown in FIG. 2.

In addition, the battery container 10 and the film-packed battery 20 of this embodiment can be efficiently manufactured using the long laminated film 1. Hereinafter, an example of a manufacturing method will be described with reference to FIGS. 6 to 12.
The manufacturing method of the battery container 10 of this embodiment includes a resin plate welding process, a plate body cutting process, a side wall forming process, and a wall surface connection process. These processes are substantially the same as the manufacturing method of the independent container body 4. In the following, only the differences will be described for each process.

＜ Resin plate welding process ＞
As shown in FIG. 6, a long resin plate 21 serving as a plurality of plate bodies 2 is welded to the welding layers on both sides of the long laminated film 1. An opening for exposing leads is provided in the long laminated film 1. As a method for providing the opening, a method of punching with a punching die or cutting using a laser beam can be used.
The welding method of the long resin plate 21 is the same as the welding method of the laminated film 1 and the resin plate 21 in the manufacturing method of the independent container body 4.

The opening of the long laminated film 1 is a structure for directly applying the tape body of the container body 4 obtained in a wall surface connection process described later to a method of manufacturing the thin film packaged battery 20. When a plurality of independent container bodies 4 are cut out from the band body of the container body 4 to manufacture the film-packed battery 20, there may be no opening.
In order to provide an opening in the long laminated film 1, the opening may be provided after the long resin plate 21 is fused, but it is preferable to provide an opening in the long laminated film 1 at first to improve workability.

＜ Board cutting out process ＞
As shown in FIG. 7, a plurality of plate bodies 2 are cut out from the long laminated film 1 to which the long resin plate 21 is welded in the same manner as the manufacturing method of the independent container body 4. At the time of cutting out, as shown in FIG. 8, the portion formed by the laminated film 1 between the adjacent plate bodies 2 is formed by a connection portion having an opening and a lead holding portion 44. , 44 and parts of the end walls 22, 22 are formed.
Therefore, the length of the laminated film 1 between the adjacent plate bodies 2 is longer than the length of the two adjacent cutting surfaces (side end faces) welded to the plate body 2 by the connecting portion and the two lead holding portions 44. The amount of length.

Referring to FIG. 8, two two-dot chain lines 1 a and 1 a extending outward from the end edge of the opening of the laminated film 1 are imaginary planned cutting lines for cutting and removing the connecting portion. The planned cutting lines 1 a and 1 a cut and remove the connecting portion sandwiched by the two sets of planned cutting lines 1 a and 1 a to cut off the belts to which a plurality of completed container bodies 4 or film-packed batteries 20 are connected. The widths of the two sets of planned cutting lines 1a, 1a may be narrower than the width of the openings as long as the connecting portion can be cut and removed.
A two-dot chain line 1 b connecting the side end surfaces of the plate body 2 to each other is a boundary line between a portion that becomes the bottom portion 41 of the container body 4 and a portion that becomes the end wall 22. When the laminated film 1 is fused to the plate body 2 to form the end wall 22, the boundary line 1 b is valley-folded.
A two-dot chain line 1c between the boundary line 1b and the planned cutting lines 1a, 1a is a boundary line between a portion serving as the end wall 22 of the container body 4 and a portion serving as the lead holding portion 44. This boundary line 1c is mountain-folded when the end wall 22 is formed.
In addition, in FIGS. 6 to 12, an example in which two consecutive battery containers 10 are formed is shown. However, three or more battery containers 10 are usually formed.

＜ Sidewall formation process ＞
As shown in FIG. 9, similarly to the method of manufacturing the independent container body 4, the laminated film 1 is bent such that the cut-out plural plate bodies 2 stand up above the laminated film 1, and the plurality of plates are folded. The lower end surfaces of the respective bodies 2 and the laminated film 1 are welded and fixed to form a plurality of side walls 43.

＜ Wall surface connection project ＞
Along the two-dot chain line shown in FIG. 8, the portion of the laminated film 1 that becomes the end wall 42 of the laminated film 1 between which the side walls 43 of the plate body 2 are fused is vertically folded, and is folded horizontally to fold the connection. The portion and the portion that becomes the two lead holding portions 44 are lifted horizontally and closely contact the side end surfaces of the plate body 2.
Then, the laminated film 1 is welded and fixed to the side end surface of the plate body 2 in the same manner as the method for manufacturing the independent container body 4 to obtain a battery in which a plurality of container bodies 4 shown in FIG. 10 are connected by a connecting portion. The body of the container 10.
When the connecting portion of the belt body of the obtained container body 4 is cut and removed, the battery container 10 of the present example shown in FIG. 1 can be obtained.
The obtained battery case 10 can also be used as the battery case 10 without breaking.

Next, a method for manufacturing the film-packed battery 20 that uses the band body of the battery container 10 as the battery container 10 without breaking will be described.
The manufacturing method of the film-packed battery 20 of this embodiment is a method of adding a battery element storage process and a sealing process to the manufacturing method of the battery container 10 of the present invention. Hereinafter, the battery element storage process and the sealing process will be described.

＜ Battery element storage process ＞
In the method of manufacturing the film-packed battery 20 of this embodiment, first, as shown in FIG. 11, the battery element 5 is housed in each of the battery containers 10 of the belt body of the battery container 10.
When accommodating the battery element 5, the end portions of the positive electrode lead and the negative electrode lead protruding from the battery container 10 in opposite directions to each other are stored in the opening of the connection portion.

＜ Sealing Engineering ＞
In this embodiment, a long cover material 3 formed by connecting a plurality of cover materials 3 is used. The cover member 3 has a connection portion similar to the connection portion of the belt body of the battery container 10, and the connection portion includes an opening. The size of the opening may be different from the connecting portion of the band of the battery container 10, but it is preferably the same as the connecting portion of the band of the battery container 10. Alternatively, a plurality of independent cover materials 3 may be used.
The connection portion of the long cover material 3 used in this embodiment has the same width and length as the connection portion of the belt body of the container body 4, and has the same shape openings formed at the same interval. In addition, the lengths of the bands may be different from each other.

The cover material 3 is overlapped so that the opening of the strip body of the battery container 10 containing the battery element 5 and the opening of the long cover material 3 coincide, and each cover material 3 is fused to the container body 4 from the cover material 3 side. Both the upper end surface of the plate body 2 and the lead holding portion 44 are provided. In this way, when the lead is sandwiched between each cover material 3 and the lead holding portion 44 of each battery container 10, and the opening of each battery container 10 is blocked, the thin film packaged battery shown in FIG. 12 can be obtained Band of 20.
When the connecting portion of the tape body of the obtained film-packed battery 20 is cut and removed, the film-packed battery 20 shown in FIG. 2 is completed.
In addition, the strip body of the obtained film-packed battery 20 may be directly used as a finished product.

<Second embodiment>
As shown in FIG. 13, the battery container 10 of this embodiment is different from the battery container 10 of the first embodiment only in the following point: The length of the lower end surface of the plate body 2 is shorter than the length of the upper end surface. In this embodiment, the side end surface of the plate body 2 is inclined at an acute angle with respect to the upper end surface. Therefore, compared with the first embodiment, the bending angle of the end wall 42 with respect to the bottom surface 41 or the lead holding portion 44 is smaller. Therefore, the battery container 10 of the present embodiment is preferable when a highly rigid stainless steel foil is used as the barrier layer in the laminated film 1 or the cover material 3. In addition, since the opening portion of the container body 4 is wider than the bottom portion 41, operability is good when the battery element 5 is stored.
Hereinafter, only the differences between the battery container 10 of this embodiment and the battery container 10 of the first embodiment will be described.

Both end surfaces of the plate body 2 used in the battery container 10 of this embodiment are formed to be inclined at an acute angle with respect to the upper end surface. The main surface of the plate body 2 shown in FIG. 13 is trapezoidal. However, for example, as shown in FIG. 14, the side end surface of the plate body 2 may move from the upper end surface side to the lower end surface side and approach an angle of 90 °. Degrees way to bend. Alternatively, the plate body 2 shown in FIG. 13 may be bent so that the inclination angle approaches 90 degrees as it travels from the lower end surface to the end surface side.
In particular, when the plate body 2 shown in FIG. 14 is used, when the cover material 3 is welded to the lead holding portion 44, the acute angle formed by the upper end surface and the side end surface of the plate body 2 can be easily made. The ridges at the ends are melted, so that the cover material 3 can be hermetically sealed.

As shown in FIG. 13, in the battery container 10 of this embodiment, the length of the lower end surface of the plate body 2 is shorter than the length of the upper end surface.
As shown in FIG. 15, in the battery container 10 of this embodiment, the plate body 2 is cut out from the resin plate 21 fused to the laminated film 1 so that the length of the lower end surface of the plate body 2 is shorter than the length of the upper end surface. Other than that, it can be produced similarly to the first embodiment.
In addition, with regard to the plate bodies 2 and 2, it is not necessary to make the both end surfaces of the plate body 2 at an acute angle, and one of the opposite side end surfaces may be inclined at an acute angle with respect to the upper end surface, and the other is as the first The examples are formed vertically.

When the battery element 5 is housed in the battery container 10 of this embodiment and the lid member 3 is welded in the same manner as in the first embodiment, the film-packed battery 20 of this embodiment shown in FIG. 16 is completed.
In addition, the battery container 10 and the film-packed battery 20 of this embodiment can also be efficiently manufactured using the long laminated film 1. As an example of the manufacturing method, when the board body cutting process of the first embodiment is changed to cut out the board body 2 whose length of the lower end face shown in FIG. 17 is shorter than the length of the upper end face, the eighteenth can be obtained. A belt body of a battery container 10 in which a plurality of battery containers 10 shown in the figure are connected by a connecting portion.
If the connecting portion of the band body of the obtained battery container 10 is cut, removed, and separated, the battery container 10 of this embodiment can be obtained.

In this embodiment, the obtained band body of the battery container 10 can also be used as the battery container 10 without breaking.
In addition, the band of the battery container 10 can be used as the battery container 10 without being broken, and processed in the same manner as the battery element storage process and the sealing process of the first embodiment, and the film shown in FIG. 19 can be obtained. The band body of the battery 20 is packaged.
When the connecting portion of the band body of the obtained film-packed battery 20 is cut and removed, the film-packed battery 20 shown in FIG. 16 is completed.
In addition, the strip body of the obtained film-packed battery 20 may be directly used as a finished product.

<Third Example>
As shown in FIG. 20, this embodiment is different from the first embodiment only in that, when the battery container 10 is formed, the plate body 2 is provided with end wall reinforcing plates 2 h and 2 h that extend inward at the end surfaces of both sides, respectively. In this embodiment, the side end surface of the plate body 2 is reinforced with the end wall 42 by the end wall reinforcing plates 2h, 2h, and therefore, the shape retention of the battery container 10 is high.
Hereinafter, only the differences between the battery container 10 of this embodiment and the battery container 10 of the first embodiment will be described.

As shown in FIG. 20 (a), the battery container 10 of this embodiment is provided with end wall reinforcing plates 2h and 2h on both end surfaces of the plate body 2. The main surface of the plate body 2 is welded to the side wall 43 of the container body 4. Welding layer. The side end surface of the plate body 2, that is, the main surface of the end wall reinforcing plate 2 h is welded to the welding layer of the end wall 42 of the container body 4. The lower end surface of the end wall reinforcing plate 2h of the plate body 2 is welded to the welding layer of the bottom surface 41 of the container body 4. The upper end surface of the end wall reinforcing plate 2h of the plate body 2 is welded to the welding layer of the cover material 3.

When the independent battery container 10 of this embodiment is manufactured, the shape of the plate body 2 in this embodiment is more complicated than that of the plate body 2 in the first embodiment, so it is preferably formed by injection molding. The main surface and the lower end surface of the end wall reinforcing plate 2h of the plate body 2 injection-molded can be welded to the laminated film 1 in the same manner as the side and lower end surfaces of the plate body 2 in the first embodiment.

When the main surface of the plate body 2 is welded to the welding layers on both sides of the laminated film 1, the plate body 2 may be formed by direct injection molding, and then welded in a mold. In this case, it is preferable to form the cross shape in advance: the four corners of the laminated film 1 are cut in advance to form portions of the end walls 42 and 42 and the lead holding portions 44 and 44 and the side walls 43 and 43 The part is reserved as the free end. Alternatively, the four corners of the laminated film 1 may be cut after the plate body 2 is fused.

The battery container 10 of this embodiment can be manufactured by cutting out the plate body 2 of the container body 4 from the resin plate 21 serving as the plate body 2 in the same manner as in the first embodiment.
When the plate body 2 is cut out, as shown in FIG. 21 (a), it can be cut out in the same manner as the battery container 10 of the first embodiment except that the plate body 2 used in the first embodiment is used. The resin plate 21 having the end wall reinforcing plate 2h standing on the main surface of the laminated film 1 is not welded, and as shown in FIG. 21 (b), the resin plate 21 is coplanar with the outer surface of the end wall reinforcing plate 2h. The outer resin plate 21 is cut and removed.

The main surface and the lower end surface of the cut-out end wall reinforcing plate 2h of the plate body 2 can be welded to the laminated film 1 in the same manner as the side and lower end surfaces of the plate body 2 in the first embodiment, respectively.
As shown in FIG. 20 (b), the upper end surface of the end wall reinforcing plate 2h and the upper end surface of the plate body 2 are welded to the cover material 3 together.
As in the first embodiment, if the battery element 5 is housed in the container body 4 of the battery container 10 of the present embodiment and the lid member 3 is welded, the film of the present embodiment shown in FIG. 20 (b) is completed. Pack the battery 20.

In addition, the battery container 10 and the film-packed battery 20 of this embodiment can also be efficiently manufactured using the long laminated film 1.
As an example of this manufacturing method, in the resin plate welding process of the first embodiment, a long resin plate 21 shown in FIG. 22 is used to form a plurality of plate bodies 2 shown in FIG. 23 and welded to a long plate. Welding layer of the strip laminated film 1. As shown in FIG. 22, the long resin plate 21 is a resin plate having a plurality of end wall reinforcing plates 2 h standing on the main surface of the resin plate 21 of the first embodiment that is not welded to the laminated film 1.

Then, in the same manner as the plate cutting process in the first embodiment, a long laminated film 1 in which a plurality of plates 2 are welded as shown in FIG. 23 is produced, and connected to the wall surface as shown in FIG. 24. In the process, if both ends in the width direction of the laminated film 1 are welded and fixed to the main surfaces of the end wall reinforcing plates 2h of the plurality of plate bodies 2, a battery in which a plurality of container bodies 4 are connected by a connecting portion can be obtained The body of the container 10.
When the connecting portion of the belt body of the obtained battery container 10 is cut and removed, the battery container 10 of the present embodiment shown in FIG. 20 (a) can be obtained.

In this embodiment, the obtained band body of the battery container 10 can also be used as the battery container 10 without breaking.
In addition, the band of the battery container 10 can be used as the battery container 10 without being broken, and processed in the same manner as the battery element storage process and the sealing process of the first embodiment, and the film shown in FIG. 25 can be obtained. The band body of the battery 20 is packaged.
When the connecting portion of the band body of the obtained film-packed battery 20 is cut and removed, the film-packed battery 20 shown in FIG. 20 (b) is completed.
In addition, the strip body of the obtained film-packed battery 20 may be directly used as a finished product.

<Fourth Example>
As shown in FIG. 26, the battery container 10 of this embodiment differs from the battery container 10 of the first embodiment only in that the resin molded body 2 is a rectangular frame (hereinafter, the "resin molded body 2 may be sometimes "Is called" Frame 2 "). In this embodiment, since the entire peripheral wall of the container body 4 is reinforced by the frame body 2, the shape retention of the container body 4 is high.
In addition, since the battery container 10 of this embodiment can hold the lead wire only by the frame body 2 and the cover material 3, the lead wire holding portion 44 can be omitted. In this case, the lead can be clamped at an arbitrary side of the battery container 10.
Hereinafter, only the differences between the battery container 10 of this embodiment and the battery container 10 of the first embodiment will be described.

As shown in FIG. 26 (a), in the battery container 10 of this embodiment, the outer peripheral surface of the frame body 2 is welded to the welding layers of the side walls 43, 43 and the end walls 42, 42 of the container body 4. The lower end surface of the frame body 2 is welded to the bottom portion 41 of the container body 4. As shown in FIG. 26 (b), the upper end surface of the frame body 2 is welded to the cover material 3.
Since the frame body 2 in this embodiment is more complicated in shape than the plate body 2 in the first embodiment, it is preferably manufactured by injection molding. Alternatively, it can also be produced by extruding in a cylindrical shape and cutting in the longitudinal direction.

As an example of producing the independent container body 4 of this embodiment, first, the frame body 2 is produced by injection molding. The frame body 2 is produced so that the outer periphery thereof in plan view matches the bottom portion 41 of the container body 4.
Next, as shown in FIG. 27, the four corners of the laminated film 1 are cut to form the laminated film 1 in a cross shape. By cutting at four corners, the following cross shape is left around the portion that becomes the bottom portion 41: the portions that become the end walls 42, 42 and the lead holding portions 44, 44 and the portions that become the side walls 43, 43 are free The end expands outward.
In addition, the four corners of the laminated film 1 may be cut after the frame body 2 is welded.

The produced frame body 2 is overlapped with the welding layer of the laminated film 1 cut into a cross shape, and the lower end surface of the frame body 2 is welded to the bottom portion 41 of the container body 4 from the laminated film 1 side. When the frame body 2 is superimposed, the outer periphery of the frame body 2 and the boundary of the part which becomes the bottom part 41 of the container main body 4 are matched.
When the lower end surface of the frame body 2 is welded to the bottom portion 41, the frame body 2 can be directly formed by injection molding, and the frame body 2 is welded to the welding layer of the laminated film 1 in a mold at this time.

Then, the free end of the laminated film 1 is bent from the root of the frame body 2 so that the portions serving as the end walls 42 and 42 and the portions serving as the side walls 43 and 43 closely adhere to the outer peripheral surface of the frame body 2 and are removed from the laminated film. The outer peripheral surface of the frame body 2 is welded to the welding layer of the laminated film 1 on one side, so that the battery container 10 of the present embodiment shown in FIG. 26 (a) is completed.
When the frame body 2 is fused to the welding layer of the laminated film 1, the frame body 2 can be directly formed by injection molding, and the lower end surface and the outer peripheral surface of the frame body 2 can be fused to the welding layer of the laminated film 1 in a mold. When the battery element 5 is housed in the battery container 10 of this embodiment and the lid member 3 is welded in the same manner as in the first embodiment, the film-packed battery 20 of this embodiment shown in FIG. 26 (b) is completed.

In addition, the battery container 10 and the film-packed battery 20 of this embodiment can also be efficiently manufactured using the long laminated film 1. Hereinafter, an example of a manufacturing method will be described with reference to FIGS. 28 to 30.
The manufacturing method of the battery container 10 of this embodiment includes a resin plate welding process, a plate body cutting process, a side wall forming process, and a wall surface connection process. These processes are substantially the same as the manufacturing method of the independent container body 4. In the following, only the differences will be described for each process.

＜ Memectomy process ＞
First, an opening for exposing leads is provided in the long multilayer film 1 in the same manner as in the first embodiment. Then, except that only the laminated film 1 is cut out, a laminated film 1 is produced in the same manner as in the plate body cutting process of the first embodiment. The laminated film 1 has a plurality of cross shapes similar to those in the case of producing the independent battery container 10. The laminated film is connected by a connection portion having an opening.
As shown in FIG. 28, for the laminated film 1, the width of the outer peripheral surface of the frame 2 as the main surface is formed on both sides of the long laminated film 1, and the bottom of the container body 4 is a plurality of layers. The portions of 41 are cut so that the length of the laminated film 1 is longer than the length of the portions welded to the two faces of the adjacent frames 2 and 2 facing each other. As a result, the side edges of the laminated film 1 which is welded to the frame body 2 and become the side walls 43, 43 expand outward as a plurality of free ends from a portion which becomes the bottom portion 41 of the plurality of container bodies 4.

＜ Resin molding welding process ＞
A plurality of frames 2 are injection-molded, and the corners of the outer peripheral surface of the frame 2 and the four corners of the bottom portion 41 of the container main body 4 of the laminated film 1 are arranged in the same manner as in the case of producing the independent battery container 10. The frame body 2 is welded to the welding layer of the portion of the long laminated film 1 that becomes the bottom portion 41, and the long laminated film 1 to which a plurality of frames 2 are welded as shown in FIG. 28 is produced.

＜ Wall surface connection project ＞
The notched portion and the plurality of free ends of the long laminated film 1 to which the frame body 2 is fused are bent from the root of the frame body 2 to stand them up, and they are closely adhered to the outer peripheral surface of the frame body 2 The outer peripheral surface of the frame body 2 is welded to the welding layer of the laminated film 1 from the laminated film 1 side to form end walls 42 and 42 and side walls 43 and 43.
Then, similar to the wall surface connection process of the first embodiment, the portion of the laminated film 1 that becomes the end wall 42 is vertically valley-folded, and then mountain-folded horizontally to become a portion of the connection portion and the two lead holding portions 44. It is lifted horizontally and welded to the side end surface of the plate body 2 for fixing. In this way, a band body of the battery container 10 in which a plurality of battery containers 10 are connected by a connecting portion can be obtained.
When the connecting portion of the band body of the obtained battery container 10 is cut and removed, the battery container 10 of the present example shown in FIG. 26 (a) can be obtained.

In this embodiment, the obtained band body of the battery container 10 can also be used as the battery container 10 without breaking.
In addition, the band body of the battery container 10 can be used as the battery container 10 without being broken, and can be processed in the same manner as the battery element storage process and the sealing process of the first embodiment, so that the film packaged battery 20 can be obtained. .
When the connecting portion of the tape body of the obtained film-packed battery 20 is cut and removed, the film-packed battery 20 shown in FIG. 26 (b) is completed.
In addition, the strip body of the obtained film-packed battery 20 may be directly used as a finished product.

As mentioned above, although embodiment of this invention was described referring an accompanying drawing, this invention is not limited to these Example, Various changes can be made in the range which does not change the meaning of this invention.
For example, when the battery container 10 is formed, in the third embodiment in which the plate body 2 has end wall reinforcing plates 2h and 2h extending inwardly on the end faces of both sides, for example, if the The ends of the end wall reinforcing plate 2h are arranged to be used facing each other, and have a rectangular frame shape lacking a middle portion. Therefore, it is possible to use a long strip in the same manner as in the fourth embodiment using the resin molded body 2 made of a frame. The laminated film 1 is used to efficiently produce a battery container 10 and a thin-film packaged battery 20.
In the same manner, in the first and second embodiments in which the plate body 2 does not have the end wall reinforcing plates 2h and 2h on the end faces of both sides, a pair of plate bodies 2 injection-molded in advance are arranged in a double shape to face each other. By using this, as in the case of the fourth embodiment, it is possible to efficiently manufacture the battery container 10 and the film-packed battery 20 using the long laminated film 1.

In addition, in the battery container 10 and the film-packed battery 20 of the fourth embodiment, a frame having a cutout on one side or a missing side in plan view may be used instead of the frame 2. In this case, it is preferable to arrange a side having a notch or a missing edge on the lead holding portion 44 side.
In addition, in the second embodiment using the plate body 2 in which the length of the lower end surface of the plate body 2 is shorter than the length of the upper end surface, a resin plate may be interposed between the ends of the opposite plate bodies 2. Form a frame shape.
Moreover, although the form where the positive and negative electrodes protruded in opposite directions was shown, the positive and negative electrodes may protrude from one side in the same direction.

1‧‧‧ laminated film

2‧‧‧Resin molding (plate, frame)

21‧‧‧resin board

3‧‧‧ cover material

4‧‧‧ container body

41‧‧‧ (of the container body) bottom

42‧‧‧ (of the container body) end wall

43‧‧‧ (of the container body) side wall

44‧‧‧ (of the container body) lead holding section

5‧‧‧ Battery Components

10‧‧‧ Battery Container

20‧‧‧ film pack battery

FIG. 1 is a view showing the battery container of the first embodiment, in which (a) is a perspective view, (b) is a cross-sectional view taken along the line AA in FIG. 1 (a), and (c) is a view taken along the first view ( Sectional view taken along line BB in a).

Fig. 2 is a perspective view showing a film-packed battery using the battery container of the first embodiment.

Fig. 3 is a perspective view showing a part of a manufacturing process of the battery container of the first embodiment.

Fig. 4 is a perspective view showing a part of a manufacturing process of the battery container of the first embodiment.

Fig. 5 is a perspective view showing a part of a manufacturing process of the battery container of the first embodiment.

FIG. 6 is a perspective view showing a part of the manufacturing process of the battery container of the first embodiment using a long laminated film.

Fig. 7 is a perspective view showing a part of a manufacturing process of the battery container according to the first embodiment using a long laminated film.

Fig. 8 is a plan view for explaining the long laminated film shown in Fig. 7.

FIG. 9 is a perspective view showing a part of the manufacturing process of the battery container according to the first embodiment using a long laminated film.

Fig. 10 is a perspective view showing a part of a manufacturing process of the battery container according to the first embodiment using a long laminated film.

FIG. 11 is a perspective view showing a part of a manufacturing process of a thin film packaged battery using the battery container of the first embodiment manufactured by using a long laminated film.

FIG. 12 is a perspective view showing a part of a manufacturing process of a thin-film packaged battery, which uses the battery container of the first embodiment manufactured using a long laminated film.

Fig. 13 is a view showing a battery container according to a second embodiment, in which (a) is a perspective view, and (b) is a cross-sectional view taken along a line C-C in Fig. 13 (a).

Fig. 14 is a cross-sectional view showing another example of a resin molded body used in the second embodiment.

Fig. 15 is a perspective view showing a part of a manufacturing process of a battery container according to a second embodiment.

Fig. 16 is a perspective view showing a film-packed battery using the battery container of the second embodiment.

Fig. 17 is a perspective view showing a part of a manufacturing process of a battery container according to a second embodiment using a long laminated film.

Fig. 18 is a perspective view showing a part of a manufacturing process of a battery container according to a second embodiment using a long laminated film.

FIG. 19 is a perspective view showing a part of a manufacturing process of a thin-film packaged battery using a battery container of a second embodiment manufactured using a long laminated film.

Fig. 20 is a diagram for explaining the battery container of the third embodiment, in which (a) is a perspective view showing the battery container of the present embodiment, and (b) is a film showing the battery container using the embodiment A perspective view of a packaged battery.

Fig. 21 is a view showing a part of a manufacturing process of a battery container according to a third embodiment, in which (a) is a perspective view showing a state in which a resin plate is welded to a laminated film, and (b) is a view showing a state in which the resin plate is cut This is a perspective view showing how the resin molded body is cut.

Fig. 22 is a perspective view showing a part of a manufacturing process of a battery container according to a third embodiment using a long laminated film.

Fig. 23 is a perspective view showing a part of a manufacturing process of a battery container according to a third embodiment using a long laminated film.

Fig. 24 is a perspective view showing a part of a manufacturing process of a battery container according to a third embodiment using a long laminated film.

Fig. 25 is a perspective view showing a part of a manufacturing process of a thin-film packaged battery using a battery container of a third embodiment manufactured using a long laminated film.

Fig. 26 is a view showing a battery container of a fourth embodiment, in which (a) is a perspective view showing the battery container of this embodiment, and (b) is a film-packed battery using the battery container of this embodiment; Perspective view.

Fig. 27 is a perspective view showing a part of a manufacturing process of a battery container according to a fourth embodiment.

Fig. 28 is a perspective view showing a part of a manufacturing process of a battery container according to a fourth embodiment using a long laminated film.

Fig. 29 is a perspective view showing a part of a manufacturing process of a battery container according to a fourth embodiment using a long laminated film.

FIG. 30 is a perspective view showing a part of a manufacturing process of a thin film packaged battery using a battery container of a fourth embodiment manufactured using a long laminated film.

Claims (5)

A battery container comprising a container body and a lid material, the container body being formed of a laminated film having a welding layer on one surface of a metal foil and a protective layer on the other surface of the metal foil; The welding layer serves as the inner surface side of the container body; The peripheral wall of the container body is welded and connected to the four wall surfaces which are bent and bent from the bottom of the container body by folding lines; Among the four wall surfaces, the resin molded body is welded to at least a pair of the wall surfaces facing each other. The battery container according to item 1 of the patent application scope, wherein the resin molded body is a plate body, and a side surface of the plate body is a cover material welding surface. The battery container according to item 2 of the scope of the patent application, wherein the resin molded body is a plate body having extension portions for welding the wall surface at both ends. The battery container according to item 1 of the scope of patent application, wherein the resin molded body is a frame body, and a top surface of the frame body is a cover material welding surface. A film-packed battery is a film-packed battery using a battery container according to any one of claims 1 to 4, wherein a battery element is housed in the container body and sealed by the cover material.