TW201607108A - 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 packaging battery, and method of manufacturing the same

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

Conventionally, as a battery container that houses a battery element such as a lithium ion secondary battery or an electric double layer capacitor (all charging/discharging elements including an electrolyte), a metal container having excellent water vapor permeability resistance is often used. However, the metal container is heavy, bulky, complicated in packaging engineering, and low in productivity. In particular, the welding of the container body and the lid requires a large amount of man-hours, and there is a problem from the viewpoint of mass productivity. Further, in lithium batteries and the like for electric vehicles, since the number of vehicles is large, it is desirable that the containers are light and compact.

In response to these demands, a bag type in which a laminate composed of a base material layer, a metal foil such as aluminum, or a sealant layer is formed into a bag shape, or a pressure molded of the laminate to form a concave portion and a lithium ion battery main body has been developed. A film-packaged battery such as a concavo-convex type (also referred to as "stretching type") that is accommodated in the concave portion (for example, Patent Documents 1 and 2).

The stretch processing type battery container can also be housed for a slightly thick battery element, and has the advantage that the battery element is easily filled and packaged, and the volume effect The ratio (ratio of the volume to the entire volume of the battery container) is high, and it is easy to achieve weight reduction and low cost.

[Prior patent documents] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2002-216713

Patent Document 2: Japanese Laid-Open Patent Publication No. 2010-262932

However, in the battery container of the stretch processing type, as described in Patent Documents 1 and 2, when a slip agent or a fluid paraffin layer or the like is used, the smoothness of the surface of the mold and the packaging material is improved, and the drawing can be carried out deeper. Stretching processing. However, even if the stretchability is improved, since the metal foil is stretched into a three-dimensional shape, the stretching depth is limited, and the depth of the stretch molding container is about 10 mm. Therefore, there is a problem that a large battery element having a large capacity cannot be accommodated.

In addition, since the corners are particularly strongly stretched, the metal foil may become thinner or a plurality of pinholes may be formed on the metal foil. If moisture enters from a thin portion of the metal foil or a pinhole, it reacts with the electrolyte to form hydrofluoric acid or the like. Therefore, there is a problem that the welded portion of the electrode member is deteriorated or the electrolyte is leaked.

The present invention has been made in view of the above problems, and an object of the invention is to provide a battery container, a film packaging battery using the battery container, and a method for producing such a product having high manufacturing efficiency, and the battery container is easy to be filled and packaged. It can be designed to have an arbitrary thickness so as to be lightweight, volumetric, and even large-capacity as in the case of a stretch-process type battery container. Thick battery elements can also be easily stored.

The present invention provides the following battery container.

(1) A battery container having a container body formed of a laminated film having a metal foil and a welded layer, wherein a wall surface bent and raised from a bottom of the square is welded to the top wall of the container body The surface is a resin molded body which is a sealing material of a cover material, and is connected.

(2) The battery container according to Item 1, wherein the resin molded body is a plate body, and a side surface of the plate body is 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 surfaces at both ends.

(4) The battery container according to (1), wherein the resin molded body is a frame body, and a top surface of the frame body is a cover material welding surface.

The present invention provides the following method of manufacturing a battery container.

(5) The method of manufacturing a battery container according to any one of the preceding claims, wherein the method of manufacturing the battery container is characterized by the following: a resin plate welding process, which is to be a long resin sheet which is divided into a plurality of the resin molded bodies is welded to the welded layers on both sides of the long laminated film; the plate body is cut out, and the resin plate and the substrate are obtained in the following manner The laminated film is cut out to cut out the resin molded body: the resin sheets are retained as a plurality of the resin molded bodies on both sides of the long laminated film, and the adjacent resin is present The laminated body between the molded bodies is longer than the length of the two faces which are welded to the adjacent resin molded bodies facing each other; the side wall forming works, the remaining of the resin molded body is retained The laminated film is bent so that the resin molded bodies on both sides face each other to stand up, and the resin molded body is The laminated film that is in contact with the lower end is welded to the resin molded body to form a side wall, and a wall surface connection process is performed, and a portion where the slit is formed in the laminated film is bent from a root portion of the resin molded body to stand up, and The resin molding body weight is combined and welded, and the wall surface of the container body is joined to form a peripheral wall of the container body.

(6) The method of manufacturing a battery container according to any one of the preceding claims, wherein the method of manufacturing the battery container is characterized by having the following work: a film cutting process, in a strip The both sides of the laminated film have a width of a main surface of the resin molded body, and a portion of the bottom portion of the container main body is retained to be adjacent to each other. The laminated film in which the length of the two faces of the resin molded body facing each other is long is cut off, and the side edge of the laminated film welded to the resin molded body is made to have a plurality of freedoms The end is provided with a slit extending outward from a portion which becomes the bottom portion of the container body; the resin molded body is welded to make the angle of the outer peripheral surface of the resin molded body and the laminated film become the container main body a portion of the four corners of the bottom portion are disposed in unison, and the resin molded body is welded to the welded layer of the laminated film; and a wall jointing process, the portion having the slit and the free end of the laminated film are Resin The root of the bent upright so that they were welded with the resin molded body together, said coupling wall surface of the container body is formed in the peripheral wall of the container body.

(7) The method of manufacturing a battery container according to the item (5) or (6), wherein the battery container manufacturing method further comprises an electrode for providing an electrode lead portion formed of an opening on the long laminated film. Opening work.

Further, the present invention provides the following film packaging battery.

(8) A film-packaged battery using the battery container according to any one of the items (1) to (4), wherein the battery element is housed in the container body and sealed by a lid member.

Further, the present invention provides the following method for producing a film packaging battery.

(9) A method of producing a film-wrapped battery using the method of manufacturing a battery container according to any one of the items (5) to (7), wherein The manufacturing method includes, in order, a battery element storage project in which a battery element is housed in a battery container formed in the wall surface connection process, and a sealing process in which a lid member is welded to an opening of the battery container.

According to the battery container and the film packaging battery of the present invention, the bottom and the peripheral wall of the battery container main body are composed of a laminated film containing a thin metal foil, and the battery container has high barrier properties and weight. Light and volume efficient. Further, unlike the stretched type battery container, the peripheral wall is connected by the resin molded body, and therefore the shape retainability is excellent. Further, since the laminated film containing the metal foil is bent only by the fold line, it is not stretched into a three-dimensional shape. Therefore, even if the metal foil is thin, cracks or a large number of pinholes are not generated in the metal foil. Thereby, since the depth of the battery container main body can be freely designed, even a thick battery element having a large capacity can be easily accommodated. In addition, even if it is a metal foil which is currently not used in a stretch processing type container, the metal foil having low stretchability is used, or the metal foil which is not suitable for drawing processing due to small stretchability is used. The membrane can also be used freely.

Further, since the resin molded body has the cover material welding surface, at least the opposite sides of the film packaging battery can weld the lid member to the resin molded body for sealing. Thereby, since the welded portion of the lid member does not protrude to the outside of the battery container, the battery becomes compact, and in the case where a plurality of batteries are used in aggregate, the volume of the aggregate can be reduced. In addition, the operability when storing or collecting a plurality of batteries is also excellent.

According to the battery container and the method of manufacturing a film packaging battery of the present invention, a plurality of battery container bodies are formed using a long laminated film. With this configuration, the battery container or the film-packaged battery can be continuously produced while winding the laminated film wound around the roll, the core roll, and the roll, or the laminated film in which the resin molded body is welded, so that the production efficiency is high.

1‧‧‧Laminated film

2‧‧‧Resin molded body (plate body, frame)

21‧‧‧resin board

3‧‧‧Cleaning

4‧‧‧ container body

41‧‧‧ (bottom of the container)

42‧‧‧ (end of the container body)

43‧‧‧ (the main body of the container)

44‧‧‧ (container body) lead clamping

5‧‧‧ battery components

10‧‧‧Battery container

20‧‧‧film packaging battery

Fig. 1 is a view showing a battery container according to a first embodiment, wherein (a) is a perspective view, (b) is a cross-sectional view taken along line AA in Fig. 1(a), and (c) is along the first figure ( A cross-sectional view of the BB line in a).

Fig. 2 is a perspective view showing a film-packaged 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 a 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 of the first embodiment using a long laminated film.

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

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

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

Fig. 13 is a view showing the battery container of the second embodiment, wherein (a) is a perspective view, and (b) is a cross-sectional view taken along line C-C of Fig. 13(a).

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

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

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

Figure 17 is a view showing a battery of a second embodiment using a long laminated film. A perspective view of a part of the manufacturing process of the container.

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

Fig. 19 is a perspective view showing a part of a manufacturing process of a film packaging battery using a battery container of a second embodiment manufactured using a long laminated film.

Figure 20 is a view for explaining a battery container of a third embodiment, wherein (a) is a perspective view showing the battery container of the present embodiment, and (b) is a film showing the battery container of the present embodiment. A perspective view of the packaged battery.

Fig. 21 is a view showing a part of the manufacturing process of the battery container of the third embodiment, wherein (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 resin plate cut. A perspective view of a state in which a resin molded body is formed by breaking.

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

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

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

Fig. 25 is a perspective view showing a part of a manufacturing process of a film packaging battery using a battery container of a third embodiment which is manufactured by using a long laminated film.

Figure 26 is a view showing a battery container of a fourth embodiment, wherein (a) is a perspective view showing the battery container of the present embodiment, and (b) is a view showing the use of the battery container. A perspective view of a film-wrapped battery of a battery container of an embodiment.

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

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

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

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

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 houses the battery element 5 and becomes the film package battery 20 of the present embodiment shown in Fig. 2 . The film package battery 20 of the present embodiment is a secondary battery or an electric double layer capacitor or the like.

In the film packaging battery 20 of the present embodiment, a battery element 5 having a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution is housed inside the battery container 10. Further, the battery element 5 is a battery element containing all the elements required for charging/discharging including an electrolyte.

In the film package battery 20 of the present 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 electrically connected to the electrode plate.

As the separator, a porous film made of a thermoplastic resin such as polyolefin, A sheet-like member capable of immersing an electrolyte such as a nonwoven fabric or a woven fabric.

The battery container 10 shown in Figs. 1(a) to (c) has a container body 4 composed of a laminated film 1 having a metal foil and a welded layer. In the battery container 10, the resin molded body 2 is welded to the welded layer on the pair of side faces of the container body 4 facing each other. The battery container 10 has a bottom portion 41 formed in a rectangular shape in plan view, a pair of end walls 42, 42 and side walls 43, 43 rising from the end edge of the bottom portion 41; a plate-shaped resin molded body 2 welded to the side wall 43; And a lead holding portion 44 that protrudes outward from the end of the end wall 42.

The film package battery 20 shown in FIG. 2 houses the battery element 5 in the battery container 10, and is sealed by the lid member 3. The lid member 3 is welded to the lid material welding surface of the resin molded body 2 and the lead wire holding portion 44 at the opening of the container body 4. The lead wire is sandwiched by the lead holding portion 44 and the cover member 3.

With respect to the peripheral wall of the container body 4, the end walls 42, 42 and the side walls 43, 43 are bent from a line formed by a straight line, and are raised from the bottom portion 41 of the square, and joined at the end of the resin molded body 2, thereby forming the container body 4. The 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 composed of a straight line having no curved 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 the metal foil to be thinned or cracks or a large number of pinholes to be formed on the metal foil.

The laminated film 1 which forms the container main body 4 is a laminated film in which the metal foil and the innermost layer of the weld layer made of a thermoplastic resin are laminated.

In the present embodiment, the laminated film 1 has a welded layer only on one side. Laminated film 1 The weld layer is the innermost layer of the container body 4.

In the laminated film 1 used in the present embodiment, a protective layer made of a resin is laminated on the opposite side of the metal foil from the welded layer.

The protective layer prevents the metal foil from being damaged by moisture or electrolyte, or the metal foil is in contact with other articles to cause damage. The protective layer is preferably formed of a thermoplastic resin or a thermosetting resin having a higher melting point than the welded layer.

Specific examples of the laminated film 1 include a laminated film obtained by laminating a polyester such as polyethylene terephthalate or polybutylene naphthalate or 6 nylon or 66. A protective layer formed of a resin such as polyamide or the like; a metal foil such as stainless steel or aluminum; and a welded layer formed of a 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 the respective layers, a conventional method such as dry lamination, extrusion lamination or thermocompression lamination can be employed.

The metal foil of the laminated film 1 functions as a barrier layer that imparts gas barrier properties against oxygen or water vapor to the laminated film 1 . Examples of the metal foil include an aluminum foil, an aluminum alloy foil, a stainless steel foil, an iron foil, a copper foil, or a lead foil.

Among these metal foils, aluminum foil or aluminum alloy foil is preferably used because of its small specific gravity and excellent ductility (easily extensible) and thermal conductivity. If the thermal conductivity is excellent, the heat dissipation property in the case where the battery element generates heat can be improved. The thickness of the aluminum foil is preferably in the range of 6 μm to 200 μm in consideration of barrier property assurance or processing suitability and other factors. If the thickness of the aluminum foil is less than 6 μm, there are cases where many pinholes are generated and the barrier property is lowered.

Further, the stainless steel foil is inferior in thermal conductivity as compared with the aluminum foil, but has high tensile strength and corrosion resistance. In the metal foil having high corrosion resistance, it is preferable that even if the weld layer on the inner side of the metal foil in the container main body 4 is broken and comes into contact with the electrolytic solution filled in the inside of the battery container 10, it is less likely to corrode and maintain gas barrier properties. . When a stainless steel foil is used, it is preferable to use austenite such as SUS304 or SUS316 which is excellent in corrosion resistance, and it is more preferable to use SUS316. It is preferable to set the thickness range of the stainless steel foil 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 property is lowered. Further, if the thickness of the stainless steel foil exceeds 150 μm, the rigidity is increased and it is difficult to process.

Examples of the resin used in the fusion 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 copolymerization. Polyethylene (PE) resin or propylene such as ethylene-ethyl acrylate copolymer, ethylene-methyl acrylate copolymer, ionomer, ethylene-vinyl acetate copolymer, and carboxylic acid modified polyethylene A polyolefin such as a polypropylene, a propylene-ethylene random copolymer, an ethylene-propylene block copolymer, a propylene-α-olefin block copolymer, or a polypropylene (PP) resin such as a carboxylic acid-modified polypropylene.

As shown in Fig. 2, in the present embodiment, as the lid member 3, another member having the same laminated structure as that of the laminated film 1 was used. The cover member 3 may also be integral with the laminated film 1 and a part thereof may be folded.

When the lid member 3 and the laminated film 1 are integrated, the ridge line of the top surface of the container body 4 in which the laminated film 1 is folded is covered with the laminated film 1, and therefore the resin molded body 2 has a thin plate shape and is barrier-like. The reduction is also small and preferred. And, more The ridge line of the container body 4, which is preferably a folded laminated film 1, which faces the ridge line of the top surface, is also covered by the laminated film 1. In this case, it is preferable to enlarge the width of the laminated film 1, and to provide a welded layer on the outer surface of the laminated film 1, and to weld the excess cover member 3 to the outer surface of the side wall 43 of the container body 4.

In the present embodiment, the cover member 3 is another member having the same width as the laminated film 1. In this case, although the ridge line of the top surface of the container main body 4 is not covered by the cover material 3, due to the thickness of the resin molded body 2, generally, the decrease in barrier property is small.

In the case where the ridge line of the top surface of the container body 4 is covered by the lid member 3, it is preferable that the width of the lid member 3 is 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 the form of a thin plate, the decrease in barrier properties is small, which is preferable. In this case, it is preferable to provide a welded layer on the outer surface of the laminated film 1, and the excess cover member 3 is welded and fixed to the outer surface of the side wall 43 of the container body 4.

In the case where the laminated structure of the cover member 3 is different from that of the laminated film 1, a laminated film having a metal foil and a welded layer is preferable. However, in the case of using a thick resin sheet having a barrier property close to that of the metal foil, the metal foil may not be provided.

In the case where the lid member 3 is a laminated film having a metal foil and a welded layer, it is preferable to have a structure in which the same protective layer as that of the laminated film 1 is laminated.

As shown in FIGS. 1(a) and 1(c), the battery container 10 of the present embodiment is welded to the inner surfaces of the side walls 43, 43 on both sides of the container main body 4 so as to be opposed to each other with the side wall 43. Resin molded bodies 2 and 2 of the same length of the cover material welding surface. The width of the resin molded body 2 is the same as that of the side wall 43.

In the present embodiment, the resin molded body 2 is formed in a plate shape and in the container body 4 The lower end surface on the bottom portion 41 side, the upper end surface which is the lid material welding surface on the opening side, and the side end surface in the longitudinal direction (hereinafter, the case where the "resin molded body 2" is referred to as "plate body 2") .

The main surface of the plate body 2 is welded to the side wall 43, and the end surface in the longitudinal direction, that is, the side end surface is welded to the end wall 42, and the lower end surface is welded to the bottom portion 41. The upper end surface of the plate body 2 is a welded surface that is welded to the lid member 3. The plate body 2 may not have a plate shape as long as it has these welded surfaces. For example, the central portion of the plate body 2 may be a hollowed out frame, or may be a bridge shape such as a pier and a bridge surface of two or more bridges.

Further, in the present specification, the "main surface" indicates the largest one of the plurality of faces.

As the resin forming the resin molded body 2, a resin which can be welded to the welded layer of the laminated film 1 can be used. The resin is preferably the same resin as the resin of the welded layer of the laminated film 1, but a resin different from the resin of the welded layer of the laminated film 1 may be used as long as it can be welded to the welded layer of the laminated film 1.

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 of the end wall 42 and the lid member 3 is excellent. Further, even if the joint portion between the end wall 42 and the side wall 43 is not covered by the laminated film 1, the decrease in the barrier property 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 property is not expected, and the volumetric efficiency of the battery container 10 is lowered.

In the present 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 constituted by the laminated film 1. However, both ends of the end wall 42 are welded to the side end faces of the plate body 2. Thus the container The end wall 42 of the main body 4 is fixed and joined to the side end of the plate body 2 in a state close to the side wall 43, thereby forming a peripheral wall of the main body container 4. In addition, the shape retainability of the 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 joined in a close state. However, due to the thickness of the plate body 2, the decrease in the barrier property at the ridge line of the joint portion is small.

The lead wire holding portion 44 of the container body 4 is formed by folding the laminated film 1 horizontally at the upper end of the end wall 42 and then projecting to the outside of the container body 4.

As shown in Fig. 2, the lid member 3 is welded to the lid member welding surface of the upper end surface of the plate body 2, and the lead wire holding portion 44 of the container body 4, thereby holding the lead wire and blocking the opening of the container body 4.

As an example of the 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, the resin sheet 21 having the same width and thickness as the plate body 2 is welded to the welded layer on both sides of the laminated film 1 which is the side wall 43 of the container body 4. At the time of welding, both side edges of the resin sheet 21 and the laminated film 1 are made uniform.

In the present embodiment, the resin sheet 21 is welded over the entire side of the laminated film 1, but it is also possible to perform welding only on a part of the side as long as the length of the sheet 2 can be secured. In addition, as for the portion where the plate body 2 is to be welded and formed, the cover material welding surface and the both end surfaces of the upper end may be fixed. Therefore, the entire main surface of the plate body 2 may be used, or only the peripheral edge may be used.

When the resin sheet 21 is welded, it is preferably welded from the laminated film 1 side by a conventional method such as ultrasonic sealing or heat sealing. Alternatively, the laminated film 1 may be placed in a mold, and the resin sheet 21 may be injection molded on the welded layers on both sides thereof. another Further, when the laminated film 1 is produced, the fusion-bonding layer and the resin sheet 21 may be extrusion-molded and laminated on a film on which a metal foil is laminated.

Further, the plate body 2 may be directly formed by injection molding without using the resin sheet 21, and the plate body 2 may be welded to the portion of the laminated film 1 which becomes the side walls 43, 43 in the mold. In this case, it is preferable to form a cross shape in advance such that a portion which becomes the bottom portion 41 is left and the four corners of the laminated film 1 are cut to become portions of the end walls 42, 42 and the lead holding portions 44, 44, And the portion that becomes the side walls 43, 43 is retained as a free end. Further, the four corners of the laminated film 1 may be cut after the plate body 2 is welded.

Further, in the present specification, "free end" means an end that is free to move.

In the present embodiment, as shown in Fig. 4, the four corners of the laminated film 1 are cut away by the width of the main surface of the resin sheet 21, and the plate body 2 is cut out from the resin sheet 21. The resin sheet 21 is cut out from the resin sheet 21 so that the size of the main surface of the plate body 2 coincides with the size of the side wall 43 of the container body 4, whereby the resin sheet 21 becomes the plate body 2. Therefore, the side end surface of the plate body 2 is formed by the cut surface at this time.

As a method of cutting the side edges of the resin sheet 21 and the laminated film 1, a method of punching the side edges of the resin sheet 21 and the laminated film 1 by a punching die or a cutting using laser light can be employed. Break and so on.

The punching using the punching die is suitable in the following point: the resin sheet 21 can be cut out in a short time by a simple device.

As shown in Fig. 4, when the side edges of the resin sheet 21 and the laminated film 1 are collectively cut, the portion where the plate body 2 is welded and the two free ends where the plate body 2 is not present remain on the laminated film 1. . These free ends are part of the end wall 42 and the lead holding portion 44.

Then, as shown in Fig. 5, the plate body 2 welded to the laminated film 1 is bent so as to rise above the laminated film 1, and then the lower end surface of the plate body 2 and the laminated film 1 are laminated from the laminated film 1 side. They are welded to fix them.

Next, the two free ends of the laminated film 1 are bent from the root of the resin molded body 2, and are closely adhered to both end faces of the respective plates 2 and 2, and are welded from the laminated film 1 side. Thereby, the end wall 42 of the container main body 4 and the side wall 43 are fixed to the plate body 2 in close proximity, and the wall surface of the container main body 4 is joined, and the peripheral wall is completed.

Then, the free end extending from the end wall 42 is horizontally bent outward to form the lead holding portion 44, whereby the battery container 10 of the present embodiment shown in Figs. 1(a) and 1(b) is obtained.

Further, the formation of the lead holding portion 44 may be performed simultaneously with the formation of the end wall 42.

The battery element 5 is placed in the obtained battery container 10, the lid member 3 is placed on the opening, and the lid member 3 is welded to both the upper end surface of the plate body 2 of the battery container 10 and the lead wire holding portion 44. Thus, the lead material is sandwiched by the lid member 3 and the lead holding portion 44, and the opening of the battery container 10 is blocked, whereby the film package battery 20 of the present embodiment shown in Fig. 2 is obtained.

Further, the battery container 10 and the film packaging battery 20 of the present 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 the present embodiment has a resin plate welding process, a plate body cutting process, a side wall forming process, and a wall surface joining process. These works are substantially the same as the manufacturing method of the independent container body 4. Below, about each worker Process, only the different points are explained.

<Resin plate welding project>

As shown in Fig. 6, the long resin sheet 21 which is a plurality of plate bodies 2 is welded to the welded layers on both sides of the long laminated film 1. An opening for exposing the lead is provided on the long laminated film 1. As a method of providing the opening, a method of punching using a punching die or cutting using laser light or the like can be employed.

The welding method of the long resin sheet 21 is the same as the welding method of the laminated film 1 and the resin board 21 in the manufacturing method of the independent container main body 4.

The opening of the long laminated film 1 is a structure for directly applying the tape body of the container main body 4 obtained in the wall surface joining process described later to the manufacturing method of the film packaging battery 20. In the case where the plurality of individual container bodies 4 are cut out from the belt body of the container body 4 to manufacture the film package battery 20, there may be no opening.

When the opening is provided in the long laminated film 1, the opening may be provided after the long resin sheet 21 is welded. However, it is preferable to provide an opening in the long laminated film 1 at first, and workability is good.

<Plate cut out project>

As shown in Fig. 7, in the same manner as the method of manufacturing the independent container body 4, a plurality of plate bodies 2 are cut out from the long laminated film 1 in which the long resin sheets 21 are welded. When the cutting is performed, as shown in Fig. 8, the portion between the adjacent plate bodies 2 composed only of the laminated film 1 is formed by the connecting portion having the opening and the lead holding portion 44. , 44 and portions of the end walls 22, 22 are formed.

Therefore, the length of the laminated film 1 between the adjacent plate bodies 2 is larger than the length of the adjacent two cut faces (side end faces) welded to the plate body 2, and the joint portion and the two The amount of the length of the lead holding portion 44.

In the eighth embodiment, two two-dot chain lines 1a and 1a extending outward from the edge of the opening of the laminated film 1 are virtual cutting planned lines for cutting and removing the connecting portion. The cutting planned lines 1a and 1a are cut and removed by the connecting portions sandwiched between the two sets of cutting lines 1a and 1a, and the belt bodies in which the plurality of completed container main bodies 4 or the film packaging battery 20 are connected are separated. The width of the two sets of planned cutting lines 1a and 1a can be narrower than the width of the opening as long as the connecting portion can be cut and removed.

Further, a two-dot chain line 1b that connects the side end faces 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 welded to the plate body 2 to form the end wall 22, the boundary line 1b is folded by the valley.

Further, the two-dot chain line 1c between the boundary line 1b and the planned cutting lines 1a and 1a is a boundary line between the portion which becomes the end wall 22 of the container main body 4 and the portion which becomes the lead holding portion 44. This boundary line 1c is folded by the mountain when the end wall 22 is formed.

Further, in FIGS. 6 to 12, an example in which two continuous battery containers 10 are formed is illustrated, but three or more battery containers 10 are usually formed.

<Surface forming project>

As shown in Fig. 9, in the same manner as the method of manufacturing the individual container body 4, the laminated film 1 is bent so that the plurality of cut sheets 2 rise above the laminated film 1, and the plurality of sheets are folded. The lower end faces of the bodies 2 and the laminated film 1 are welded and fixed to form a plurality of side walls 43.

<Wall connection project>

The side wall 43 of the plate body 2 will be welded along the two-dot chain line shown in FIG. The portion of the laminated film 1 which is the end wall 42 between the two is vertically folded and folded horizontally, thereby horizontally lifting the joint portion and the portion which becomes the two lead holding portions 44 and closely adhering to the plate body. 2 side end faces.

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 of manufacturing the independent container body 4, and the battery in which the plurality of container bodies 4 shown in FIG. 10 are connected by the connection portion is obtained. The belt body of the container 10.

When the connection portion of the belt body of the obtained container body 4 is cut and removed, the battery container 10 of the present embodiment shown in Fig. 1 can be obtained.

The obtained tape body of the battery container 10 can also be used as the battery container 10 without being broken.

Next, a method of manufacturing the film packaging battery 20 used as the battery container 10 without breaking the tape of the battery container 10 will be described.

The method of manufacturing the film packaging battery 20 of the present embodiment is a method of attaching a battery element housing process and a sealing process to the method of manufacturing the battery container 10 of the present invention. Hereinafter, the battery element storage project and the sealing process will be described.

<Battery component storage project>

In the method of manufacturing the film-packaged battery 20 of the present embodiment, first, as shown in FIG. 11, the battery element 5 is housed in each of the battery containers 10 of the tape body of the battery container 10.

When the battery element 5 is housed, the end portions of the positive electrode lead and the negative electrode lead that protrude from the battery container 10 in opposite directions to each other are housed in the opening of the connecting portion.

<sealing engineering>

In the present embodiment, a long cover member 3 in which a plurality of cover members 3 are joined is used. Similarly to the connection portion of the tape body of the battery container 10, the lid member 3 has a connection portion having an opening. The size of the opening may be different from the connection portion of the tape body of the battery container 10, but it is preferably the same as the connection portion of the tape body of the battery container 10. Further, a plurality of separate cover members 3 may be used.

The joint portion of the long lid member 3 used in the present embodiment has the same width and length as the joint portion of the belt body of the container body 4, and openings having the same shape are formed at the same interval. In addition, usually the lengths of the strips may not coincide with each other.

The lid member 3 is superposed so that the opening of the tape body of the battery container 10 in which the battery element 5 is housed and the opening of the long lid member 3 are aligned, and the respective lid members 3 are welded to the respective container bodies 4 from the lid member 3 side. Both the upper end surface of the plate body 2 and the lead holding portion 44 are provided. Thus, when the lead wires are sandwiched between the respective cover members 3 and the lead holding portions 44 of the respective battery containers 10, and the opening portions of the respective battery containers 10 are blocked, the film-packaged battery shown in Fig. 12 can be obtained. 20 belt body.

When the connection portion of the tape body of the obtained film packaging battery 20 is cut and removed, the film package battery 20 shown in Fig. 2 is completed.

Alternatively, the obtained tape-packaged battery 20 may be directly used as a finished product.

<Second embodiment>

As shown in Fig. 13, the battery container 10 of the present embodiment differs 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 formed shorter than the length of the upper end surface. In the present embodiment, the side end surface of the plate body 2 is inclined at an acute angle with respect to the upper end surface, and therefore, compared with the first embodiment, the end portion The bending angle of the wall 42 with respect to the bottom surface 41 or the lead holding portion 44 is small. Therefore, in the battery container 10 of the present embodiment, it is preferable to use a stainless steel foil having high rigidity as the barrier layer in the laminated film 1 or the lid member 3. Further, since the opening of the container body 4 is wider than the bottom portion 41, the operability is good when the battery element 5 is housed.

Hereinafter, only differences between the battery container 10 of the present embodiment and the battery container 10 of the first embodiment will be described.

Both end faces of the plate body 2 used in the battery container 10 of the present 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 a trapezoidal shape. However, as shown in Fig. 14, for example, the side end surface of the plate body 2 may be inclined at an inclination angle of 90 as it travels from the upper end surface side toward the lower end surface side. The way to bend. Alternatively, in the plate body 2 shown in Fig. 13, the plate body 2 may be curved so as to be inclined at an inclination angle of 90 degrees as it goes from the lower end surface to the upper end side.

In particular, when the plate body 2 shown in Fig. 14 is used, when the lid member 3 is welded to the lead wire 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. Since the ridge line of the end is melted, the lid member 3 can be hermetically sealed.

As shown in Fig. 13, in the battery container 10 of the present 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 the present embodiment, the plate body 2 is cut out from the resin sheet 21 welded 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. The production can be performed in the same manner as in the first embodiment.

Further, regarding the plate bodies 2 and 2, it is not always necessary to form the both end faces of the plate body 2 at an acute angle, and one of the opposite side end faces may be inclined at an acute angle with respect to the upper end surface, and the other may be the first one. It is formed vertically as in the embodiment.

When the battery element 5 is housed in the battery container 10 of the present embodiment and the cover material 3 is welded in the same manner as in the first embodiment, the film package battery 20 of the present embodiment shown in Fig. 16 is completed.

Further, the battery container 10 and the film packaging battery 20 of the present embodiment can also be efficiently manufactured using the long laminated film 1. As an example of the manufacturing method, if the plate body 2 in which the length of the lower end surface shown in FIG. 17 is shorter than the length of the upper end surface is cut in the plate cutting process of the first embodiment, the 18th can be obtained. The battery container 10 shown in the figure is a belt body of the battery container 10 which is connected by a connection part.

When the connection portion of the tape body of the obtained battery container 10 is cut off and separated, the battery container 10 of the present embodiment can be obtained.

In the present embodiment, the obtained belt body of the battery container 10 can also be used as the battery container 10 without being broken.

In addition, when the tape body of the battery container 10 is used as the battery container 10 without being broken, the film is 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 tape of the battery 20 is packaged.

When the connection portion of the tape body of the obtained film packaging battery 20 is cut and removed, the film package battery 20 shown in Fig. 16 is completed.

Alternatively, the obtained tape-packaged battery 20 may be directly used as a finished product.

<Third embodiment>

As shown in Fig. 20, the difference between the present embodiment and the first embodiment is only that when the battery container 10 is formed, the plate body 2 has end wall reinforcing plates 2h and 2h extending inward on both side end faces. In the present embodiment, the side end faces of the plate body 2 are reinforced by the end wall reinforcing plates 2h, 2h, and therefore, the shape retainability of the battery container 10 is high.

Hereinafter, only differences between the battery container 10 of the present embodiment and the battery container 10 of the first embodiment will be described.

As shown in Fig. 20(a), the battery container 10 of the present embodiment is provided with end wall reinforcing plates 2h, 2h on both end faces of the plate body 2, and the main surface of the plate body 2 is welded to the side wall 43 of the container body 4. Welding layer. The side surface of the plate body 2, that is, the main surface of the end wall reinforcing plate 2h is welded to the welded 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 welded 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 welded layer of the lid member 3.

In the case of producing the independent battery container 10 of the present embodiment, since the shape of the plate body 2 in the present embodiment is more complicated than that of the plate body 2 in the first embodiment, 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 that has been molded out can be welded to the laminated film 1 in the same manner as the side end surface and the lower end surface of the plate body 2 in the first embodiment.

When the main surface of the plate body 2 is welded to the welded layers on both sides of the laminated film 1, the plate body 2 can be formed by direct injection molding, and welded in the mold. In this case, it is preferable to form a cross shape in advance such that the four corners of the laminated film 1 are cut in advance to form the end walls 42, 42 and the lead holding portion 44, The portion of 44, and the portion that becomes the side walls 43, 43 are retained as free ends. Further, the four corners of the laminated film 1 may be cut after the plate body 2 is welded.

In the battery container 10 of the present embodiment, the plate body 2 of the container body 4 is cut out from the resin sheet 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), the plate body 2 of the first embodiment can be cut out in the same manner as the battery container 10 of the first embodiment except for the following case. The resin sheet 21 on which the end wall reinforcing plate 2h is erected on the main surface of the laminated film 1 and which is coplanar with the outer surface of the end wall reinforcing plate 2h as shown in Fig. 21(b) The outer resin sheet 21 is cut and removed.

The main surface and the lower end surface of the end wall reinforcing plate 2h of the cut plate body 2 can be welded to the laminated film 1 in the same manner as the side end surface and the lower end surface of the plate body 2 in the first embodiment.

As shown in Fig. 20(b), the upper end surface of the end wall reinforcing plate 2h is welded to the lid member 3 together with the upper end surface of the plate body 2.

In the same manner as in the first embodiment, when 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 embodiment shown in Fig. 20(b) is completed. Pack the battery 20.

Further, the battery container 10 and the film packaging battery 20 of the present embodiment can also be efficiently manufactured using the long laminated film 1.

In the resin sheet welding process of the first embodiment, the long resin sheet 21 in Fig. 22 is used as the plurality of sheets 2 shown in Fig. 23, and is welded to the long length. The welded layer of the laminated film 1 of the strip. As shown in Fig. 22, the long resin sheet 21 is not in the resin sheet 21 of the first embodiment. A resin plate in which a plurality of end wall reinforcing plates 2h are erected on the main surface of the laminated film 1 is welded.

Then, in the same manner as the sheet cutting process in the first embodiment, a long laminated film 1 obtained by welding a plurality of plate bodies 2 shown in Fig. 23 is produced, and as shown in Fig. 24, the wall surface is joined. In the process, when both ends of the laminated film 1 in the width direction 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 belt body of the container 10.

When the connection portion of the tape 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 the present embodiment, the obtained belt body of the battery container 10 can also be used as the battery container 10 without being broken.

In addition, when the tape body of the battery container 10 is used as the battery container 10, the battery container 10 is processed in the same manner as the battery element storage project and the sealing process of the first embodiment, and the film shown in Fig. 25 can be obtained. The tape of the battery 20 is packaged.

When the connection portion of the tape body of the obtained film packaging battery 20 is cut and removed, the film package battery 20 shown in Fig. 20(b) is completed.

Alternatively, the obtained tape-packaged battery 20 may be directly used as a finished product.

<Fourth embodiment>

As shown in Fig. 26, the battery container 10 of the present embodiment differs from the battery container 10 of the first embodiment only in that the resin molded body 2 is a square frame (hereinafter, the "resin molded body 2" may be used. "called "frame 2"). In the present embodiment, the entire peripheral wall of the container body 4 is reinforced by the frame 2, so The shape of the main body 4 is high.

Further, in the battery container 10 of the present embodiment, the lead wire can be held only by the frame 2 and the lid member 3, so that the lead wire holding portion 44 can be omitted. In this case, the lead can be held at any side of the battery container 10.

Hereinafter, only differences between the battery container 10 of the present 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 the present embodiment, the outer peripheral surface of the casing 2 is welded to the welded walls of the side walls 43, 43 of the container main body 4 and the end walls 42, 42. The lower end surface of the frame 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 casing 2 is welded to the lid member 3.

Since the frame 2 in the present embodiment is more complicated in shape than the plate body 2 in the first embodiment, it is preferably produced by injection molding. Alternatively, it may be produced by extrusion molding in a tubular shape and cutting in the longitudinal direction.

As an example of the production of the independent container body 4 of the present embodiment, first, the frame 2 is produced by injection molding. The casing 2 is produced such that the outer periphery in plan view coincides with 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, and the laminated film 1 is formed into a cross shape. By the cutting of the four corners, a cross shape such as a portion which becomes the end walls 42, 42 and the lead holding portions 44, 44, and a portion which becomes the side walls 43, 43 as a center is left as a center portion which becomes the bottom portion 41. The end expands to the outside.

Further, the four corners of the laminated film 1 may be cut after the frame 2 is welded.

The produced frame 2 is superposed on the cascading cut into a cross shape The welded layer of the film 1 is welded to the bottom surface 41 of the container body 4 from the laminated film 1 side. When the frame 2 is superposed, the outer circumference of the frame 2 is aligned with the boundary of the portion of the bottom portion 41 of the container body 4.

When the lower end surface of the casing 2 is welded to the bottom portion 41, the frame body 2 can be formed directly by injection molding, and at this time, the frame body 2 is welded to the welded layer of the laminated film 1 in the mold.

Then, the free end of the laminated film 1 is bent from the root of the frame 2, and the portions which become the end walls 42, 42 and the portions which become the side walls 43, 43 are closely adhered to the outer peripheral surface of the frame 2, and are laminated from the film. The outer peripheral surface of the frame 2 is welded to the welded layer of the laminated film 1 on the one side, and thus the battery container 10 of the present embodiment shown in Fig. 26(a) is completed.

When the frame 2 is welded to the welded layer of the laminated film 1, the frame 2 can be directly formed by injection molding, and the lower end surface and the outer peripheral surface of the frame 2 are welded to the welded layer of the laminated film 1 in the mold. When the battery element 5 is housed in the battery container 10 of the present embodiment and the lid member 3 is welded in the same manner as in the first embodiment, the film package battery 20 of the present embodiment shown in FIG. 26(b) is completed.

Further, the battery container 10 and the film packaging battery 20 of the present 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 the present embodiment has a resin plate welding process, a plate body cutting process, a side wall forming process, and a wall surface joining process. These works are substantially the same as the manufacturing method of the independent container body 4. Hereinafter, only the different points will be described with respect to each project.

<Film removal engineering>

First, an opening for exposing the lead wire in the same manner as in the first embodiment is provided on the long laminated film 1. Then, a laminated film 1 having a cross shape similar to the case of producing the independent battery container 10 is produced in the same manner as the plate cutting process of the first embodiment except that only the laminated film 1 is cut out. The laminated film is joined by a connecting portion having an opening.

As shown in Fig. 28, in the laminated film 1, the width of the outer peripheral surface of the main body surface of the casing 2 on both sides of the long laminated film 1 is abundance at the bottom of the container main body 4 The portions of 41 are cut so as to retain the laminated film 1 having a longer length than the portions of the two faces facing each other in the adjacent frames 2 and 2. As a result, the side edge of the laminated film 1 which is welded to the frame 2 and becomes the side walls 43 and 43 expands outward from the portion which becomes the bottom part 41 of the some container main body 4 as a plurality of free ends.

<Resin molded body welding project>

In the same manner as in the case of producing the independent battery container 10, the angle of the outer peripheral surface of the frame 2 is aligned with the four corners of the bottom surface 41 of the container body 4 of the container body 4, and the arrangement is performed. The frame 2 is welded to the welded layer of the portion of the long laminated film 1 which is the bottom portion 41, and the long laminated film 1 in which the plurality of frames 2 are welded as shown in Fig. 28 is produced.

<Wall connection project>

The slit portion and the plurality of free ends of the long laminated film 1 in which the frame 2 is welded are bent from the root of the frame 2 to stand up, and they are closely attached to the outer peripheral surface of the frame 2. The outer peripheral surface of the frame 2 is welded to the welded layer of the laminated film 1 from the side of the laminated film 1, and the end walls 42, 42 and the side walls 43, 43 are formed.

Then, the laminated film 1 is laminated in the same manner as the wall surface joining process of the first embodiment. The portion which becomes the end wall 42 is vertically folded, and then the mountain is folded horizontally, and the portion which becomes the connection portion and the two lead holding portions 44 is horizontally lifted, and is welded to the side end surface of the plate body 2 to be fixed. A strip body of the battery container 10 in which the plurality of battery containers 10 are connected by the connection portion can be obtained.

When the connection portion of the tape body of the obtained battery container 10 is cut off and separated, the battery container 10 of the present embodiment shown in Fig. 26(a) can be obtained.

In the present embodiment, the obtained belt body of the battery container 10 can also be used as the battery container 10 without being broken.

In addition, when the tape body of the battery container 10 is used as the battery container 10 without being broken, the battery element storage process and the sealing process of the first embodiment are processed, and the tape package battery 20 can be obtained. .

When the connection portion of the tape body of the obtained film packaging battery 20 is cut and removed, the film package battery 20 shown in Fig. 26(b) is completed.

Alternatively, the obtained tape-packaged battery 20 may be directly used as a finished product.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the embodiments, and various modifications can be made without departing from the spirit and scope of the invention.

For example, in the case where the battery container 10 is formed, in the third embodiment in which the plate body 2 has the end wall reinforcing plates 2h and 2h extending inward on the both end faces, the pair of plates 2 which are formed by injection are formed in advance. When the end portions of the end wall reinforcing plates 2h are arranged to face each other, the frame shape of the square portion lacking the intermediate portion is used. Therefore, the strip can be used in the same manner as the fourth embodiment using the resin molded body 2 composed of the frame body. The laminated film 1 efficiently produces the battery container 10 and the film package Battery 20.

Further, in the first and second embodiments in which the plate body 2 does not have the end wall reinforcing plates 2h and 2h on both end faces, the pair of plate bodies 2 which are previously injection-molded are arranged to face each other in a zigzag shape. By using this, the battery container 10 and the film package battery 20 can be efficiently manufactured using the long laminated film 1 as in the case of the fourth embodiment.

Further, in the battery container 10 and the film package battery 20 of the fourth embodiment, instead of the frame 2, a frame having a notch or missing on one side in a plan view may be used. In this case, it is preferable to arrange the side having the notch or the missing side on the lead holding portion 44 side.

Further, in the second embodiment in which the length of the lower end surface of the plate body 2 is shorter than the length of the upper end surface, the resin plate can be interposed between the end portions of the opposing plate bodies 2 Form the frame shape.

Further, a form in which the positive and negative electrodes project in opposite directions to each other is shown, but the positive and negative electrodes may protrude from one side in the same direction.

1‧‧‧Laminated film

3‧‧‧Cleaning

4‧‧‧ container body

5‧‧‧ battery components

10‧‧‧Battery container

20‧‧‧film packaging battery

42‧‧‧ (end of the container body)

43‧‧‧ (the main body of the container)

44‧‧‧ (container body) lead clamping

Claims (9)

A battery container having a container body formed of a laminated film having a metal foil and a welded layer, wherein a peripheral wall of the container body is a wall surface that is bent and raised from a bottom of the square and is welded to the top surface to form a cover The resin molded body of the material welding surface is connected. The battery container according to claim 1, 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 the second aspect of the invention, wherein the resin molded body is a plate body having an extending portion for welding the wall surface at both ends. The battery container according to the first aspect of the invention, wherein the resin molded body is a frame body, and a top surface of the frame body is a lid material welding surface. A method of manufacturing a battery container according to any one of claims 1 to 3, which has the following item: a resin plate welding process, which is to be broken to become the length of the resin molded body The resin sheet of the strip is welded to the welded layer on both sides of the long laminated film; the sheet is cut out, and the resin sheet and the laminated film are cut out to cut out the resin molded body in the following manner: The resin sheets are retained as the resin molded bodies on both sides of the long laminated film, and the adjacent resin molded bodies are retained between the adjacent resin molded bodies. The laminated film having a longer length on the two faces facing each other; the side wall forming process, the laminated film in which the resin molded body is retained is bent and raised so that the resin molded bodies on both sides face each other, The laminated film that is in contact with the lower end of the resin molded body is welded to the resin molded body to form a side wall; In the wall surface connection process, the portion of the laminated film in which the slit is formed is bent from the root portion of the resin molded body to be raised, and the resin molded body is superposed and welded, and the wall surface of the container body is joined to form the container body. The perimeter wall. A method of manufacturing a battery container according to any one of claims 1 to 4, which has the following item: a film cutting process, on both sides of the long laminated film The width of the main surface of the resin molded body is such that a portion of the two faces that are opposite to each other of the adjacent resin molded body is retained between the plurality of portions that are the bottom portions of the container body. The laminated film having a long length is cut off, and a slit is provided so that a side edge of the laminated film welded to the resin molded body expands outward from a portion which becomes the bottom portion of the container body as a plurality of free ends In the resin molded body welding process, the corners of the outer peripheral surface of the resin molded body are aligned with the four corners of the bottom portion of the laminated film which is the container body, and the resin molded body is welded to the laminated film. a welded layer; and a wall joining process, wherein the slit portion and the free end of the laminated film are bent from the root of the resin molded body to cause them to rise, respectively, and the resin molded body They are welded together, connecting the wall surface of the container body to form a peripheral wall of the container body. The method of manufacturing a battery container according to the invention of claim 5, wherein the method of manufacturing the battery container further includes an opening for an electrode provided with an electrode lead portion formed of an opening in the long laminated film. A film packaging battery for use in items 1 to 4 of the patent application scope A film packaging battery for a battery container according to any one of the that, wherein the battery element is housed in the container body and sealed by a lid member. A method of manufacturing a film-wrapped battery using the method of manufacturing a battery container according to any one of claims 5 to 7, wherein the method for manufacturing the film-wrapped battery has the following works in sequence In the battery element storage project, the battery element is housed in a battery container formed in the wall surface connection process, and the sealing material is welded to the opening of the battery container.